Anti-mutual interference two-channel static loading deviceTechnical Field
The application relates to the field of static tests, in particular to an anti-mutual interference two-channel static loading device.
Background
The static test is a common test for checking the static strength of parts and the transmission performance of a mechanism. To more accurately simulate the stress of a component, two or more forces are typically applied to a single component that can be independently controlled. However, once the parts deform or mechanically move, the forces between the channels interfere with each other, reducing the accuracy of load control, and affecting the stability of the system. Therefore, a loading device is needed, which can avoid the mutual interference of forces between different channels while adjusting the loading force of each channel, improve the loading precision and reduce the control difficulty.
Disclosure of Invention
In view of the above, the application provides an anti-mutual interference two-channel static loading device, which solves the problems in the prior art, realizes the control of loading forces of two channels through one force control channel and one displacement control channel, simultaneously avoids the interference between the two loading forces and reduces the control difficulty of a loading system.
The application provides an anti-mutual interference two-channel static loading device which adopts the following technical scheme:
an anti-mutual interference two-channel static force loading device comprises a mounting frame, a first balance lever, a second balance lever, a first force loading assembly and a second force loading assembly;
The first end of the mounting frame is connected with the first end of the first balance lever through a supporting component, the middle part of the first balance lever is connected with the second end of the mounting frame through a force loading driving mechanism, and the force loading driving mechanism is used for driving the middle part of the first balance lever to be far away from or close to the second end of the mounting frame;
The second end of the second balance lever is hinged with one end of the first force loading assembly, and the middle part of the second balance lever is hinged with one end of the second force loading assembly;
The first balance lever is provided with a first sliding block sliding along the length direction of the first balance lever, the first balance lever is provided with a first driving mechanism driving the first sliding block to slide, the second balance lever is provided with a second sliding block sliding along the length direction of the second balance lever, the first sliding block and the second sliding block are connected through a middle connecting rod, one end of the middle connecting rod is hinged with the first sliding block, and the other end of the middle connecting rod is hinged with the second sliding block;
A balancing mechanism is arranged between the first balancing lever and the second balancing lever, the balancing mechanism is connected with the second end of the first balancing lever and the second end of the second balancing lever, and the balancing mechanism is used for enabling the distance from the first sliding block to the second end of the first balancing lever to be always equal to the distance from the second sliding block to the second end of the second balancing lever;
The hinge shafts of the first force loading assembly, the hinge shafts of the second force loading assembly and the hinge shafts at two ends of the middle connecting rod are parallel to each other and are perpendicular to the length direction of the first balance lever and the output direction of the output shaft of the force loading driving mechanism.
Optionally, the force loading driving mechanism is an actuator, a sleeve of the actuator is hinged to a second end of the mounting frame, a push rod of the actuator is hinged to the middle of the first balance lever, the supporting assembly comprises a first supporting connecting rod and a second supporting connecting rod, one ends of the first supporting connecting rod and the second supporting connecting rod are coaxially hinged to a first end of the first balance lever, the other ends of the first supporting connecting rod and the second supporting connecting rod are respectively hinged to the mounting frame, and hinge points of the first supporting connecting rod and the second supporting connecting rod, which are connected with the mounting frame, are arranged at intervals along the direction from the first end to the second end of the mounting frame;
the hinge shaft of the actuator, the hinge shaft of the first support connecting rod and the hinge shaft of the second support connecting rod are parallel to each other and are perpendicular to the length direction of the first balance lever and the expansion and contraction direction of the push rod of the actuator.
Optionally, the balancing mechanism comprises a linkage assembly and a telescopic rod;
The linkage assembly comprises a first balance connecting rod, a second balance connecting rod, a third balance connecting rod and a fourth balance connecting rod, wherein one end of the first balance connecting rod is hinged with a first sliding block, the hinge shafts of the first balance connecting rod and the first sliding block are coaxial with one end of a middle connecting rod and the hinge shaft of the first sliding block, one end of the second balance connecting rod is hinged with a second sliding block, the hinge shafts of the second balance connecting rod and the second sliding block are coaxial with one end of the middle connecting rod and the hinge shaft of the second sliding block, a first gear is arranged at the other end of the first balance connecting rod in a rotating mode, a second gear is arranged at the other end of the second balance connecting rod in a rotating mode, the first gear is meshed with the second gear, a first stabilizing connecting rod is arranged between the first gear and the second gear, one end of the first stabilizing connecting rod is in rotating connection with a rotating shaft of the first gear, and the other end of the first stabilizing connecting rod is in rotating connection with a rotating shaft of the second gear;
One end of the third balance connecting rod is hinged with the second end of the first balance lever, one end of the fourth balance connecting rod is hinged with the second end of the second balance lever, the other end of the third balance connecting rod is rotatably provided with a third gear, the other end of the fourth balance connecting rod is rotatably provided with a fourth gear, the third gear is meshed with the fourth gear, a second stable connecting rod is arranged between the third gear and the fourth gear, one end of the second stable connecting rod is rotatably connected with a rotating shaft of the third gear, and the other end of the second stable connecting rod is rotatably connected with a rotating shaft of the fourth gear;
The device comprises a first balance connecting rod, a second balance connecting rod, a third balance connecting rod, a fourth balance connecting rod hinge shaft, a first gear, a second gear, a third gear and a fourth gear, wherein the rotating shafts of the first balance connecting rod, the second balance connecting rod, the third balance connecting rod, the fourth balance connecting rod and the first gear are mutually parallel, the rotating shafts of the third gear and the fourth gear are perpendicular to the length direction of the first balance connecting rod and the output direction of an output shaft of a force loading driving mechanism, the distance between the hinge shafts at two ends of the first balance connecting rod is equal to the distance between the hinge shafts at two ends of the second balance connecting rod, the distance between the hinge shafts at two ends of the third balance connecting rod is equal to the distance between the hinge shafts at two ends of the fourth balance connecting rod, the tooth numbers and the moduli of the first gear and the second gear are equal, and the tooth numbers and moduli of the third gear and the fourth gear are equal.
Optionally, the balancing mechanism comprises two sets of linkage assemblies, two intermediate connecting rods are arranged, the two intermediate connecting rods are parallel and aligned, and the telescopic rod is positioned between the two intermediate connecting rods;
each set of linkage assembly comprises a first balance connecting rod, a second balance connecting rod, a third balance connecting rod, a fourth balance connecting rod, a first gear, a second gear, a third gear, a fourth gear, a first stabilizing connecting rod and a second stabilizing connecting rod;
the rotating shafts of the two first gears, the rotating shafts of the two second gears, the rotating shafts of the two third gears and the rotating shafts of the two fourth gears of the two sets of linkage components are fixedly connected through connecting shafts respectively;
the telescopic rod is positioned between the two sets of linkage components.
Optionally, a second driving mechanism for driving the second sliding block to slide along the length direction of the second balance lever is arranged on the second balance lever.
Optionally, the first driving mechanism and the second driving mechanism are pneumatic actuators or hydraulic actuators, the front cavities of the first driving mechanism and the second driving mechanism are connected to the same medium conveying pipe through pipelines, and the tail cavities of the first driving mechanism and the second driving mechanism are connected to the same medium conveying pipe through pipelines.
In summary, the application has the following beneficial technical effects:
The force loading driving mechanism is used for applying acting force to the first balance lever, acting force on the first balance lever is transmitted to the second balance lever through the first sliding block, the middle connecting rod and the second sliding block, and the force loading driving mechanism is changed to control the acting force output by the first force loading assembly and the second force loading assembly, so that the total loading force of the two loading channels is controlled. The first driving mechanism is used for controlling the position of the first sliding block on the first balance lever, and the distance from the first sliding block to the second end of the first balance lever is always equal to the distance from the second sliding block to the second end of the second balance lever through the balance mechanism, so that the position of the first sliding block is adjusted, the position of the second sliding block is changed at the same time, and the ratio of acting forces distributed to the first force loading assembly and the second force loading assembly is changed and adjusted through the position of the second sliding block.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the overall structure of an anti-mutual interference two-channel static loading device of the application;
FIG. 2 is a schematic structural view of a linkage assembly of the present application;
FIG. 3 is a schematic view of a linkage assembly according to another embodiment of the present application;
Fig. 4 is a schematic diagram of the connection of the air paths of the first driving mechanism and the second driving mechanism.
The reference numerals are 1, a mounting frame, 11, a support assembly, 12, a first support link, 13, a second support link, 14, a mounting plate, 2, a first balance lever, 21, a first sliding block, 22, a first driving mechanism, 3, a second balance lever, 31, a second sliding block, 32, a second driving mechanism, 4, a first force loading assembly, 5, a second force loading assembly, 6, a force loading driving mechanism, 7, an intermediate link, 8, a balance mechanism, 81, a linkage assembly, 811, a first balance link, 812, a second balance link, 813, a third balance link, 814, a fourth balance link, 815, a first gear, 816, a second gear, 817, a third gear, 818, a fourth gear, 82, a telescopic link, 821, a sliding rod, 822, a sliding cylinder, 83, a first stabilizing link, 84, a second stabilizing link, 85, a connecting shaft, 9, a pipeline, 91 and a medium conveying pipe.
Detailed Description
Embodiments of the present application will be described in detail below with reference to the accompanying drawings.
Other advantages and effects of the present application will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present application with reference to specific examples. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. The application may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present application. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It is noted that various aspects of the embodiments are described below within the scope of the following claims. It should be apparent that the aspects described herein may be embodied in a wide variety of forms and that any specific structure and/or function described herein is merely illustrative. Based on the present disclosure, one skilled in the art will appreciate that one aspect described herein may be implemented independently of any other aspect, and that two or more of these aspects may be combined in various ways. For example, an apparatus may be implemented and/or a method practiced using any number of the aspects set forth herein. In addition, such apparatus may be implemented and/or such methods practiced using other structure and/or functionality in addition to one or more of the aspects set forth herein.
It should also be noted that the illustrations provided in the following embodiments merely illustrate the basic concept of the present application by way of illustration, and only the components related to the present application are shown in the illustrations, not according to the number, shape and size of the components in actual implementation, and the form, number and proportion of the components in actual implementation may be arbitrarily changed, and the layout of the components may be more complicated.
In addition, in the following description, specific details are provided in order to provide a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects may be practiced without these specific details.
The embodiment of the application provides an anti-mutual interference two-channel static loading device.
As shown in fig. 1, an anti-mutual interference two-channel static loading device comprises a mounting frame 1, a first balance lever 2, a second balance lever 3, a first force loading assembly 4 and a second force loading assembly 5.
The first end of the mounting frame 1 is connected with the first end of the first balance lever 2 through a supporting component 11, the middle part of the first balance lever 2 is connected with the second end of the mounting frame 1 through a force loading driving mechanism 6, and the force loading driving mechanism 6 is used for driving the middle part of the first balance lever 2 to be far away from or close to the second end of the mounting frame 1.
The second end of the second balance lever 3 is hinged to one end of the first force loading assembly 4, and the middle portion of the second balance lever 3 is hinged to one end of the second force loading assembly 5.
The first balance lever 2 is provided with a first sliding block 21 sliding along the length direction of the first balance lever 2, the first balance lever 2 is provided with a first driving mechanism 22 driving the first sliding block 21 to slide, the second balance lever 3 is provided with a second sliding block 31 sliding along the length direction of the second balance lever 3, the first sliding block 21 and the second sliding block 31 are connected through an intermediate connecting rod 7, one end of the intermediate connecting rod 7 is hinged with the first sliding block 21, and the other end of the intermediate connecting rod 7 is hinged with the second sliding block 31.
A balancing mechanism 8 is arranged between the first balancing lever 2 and the second balancing lever 3, the balancing mechanism 8 is connected with the second end of the first balancing lever 2 and the second end of the second balancing lever 3, and the balancing mechanism 8 is used for enabling the distance from the first sliding block 21 to the second end of the first balancing lever 2 to be always equal to the distance from the second sliding block 31 to the second end of the second balancing lever 3.
The hinge shafts of the first force loading assembly 4, the second force loading assembly 5 and the middle connecting rod 7 are parallel to each other and are perpendicular to the length direction of the first balance lever 2 and the output direction of the output shaft of the force loading driving mechanism 6. The concepts of the first end and the second end are exemplified in fig. 1, where the right side is the first end and the left side is the second end.
The force loading driving mechanism 6 applies acting force to the first balance lever 2, the acting force on the first balance lever 2 is transmitted to the second balance lever 3 through the first sliding block 21, the middle connecting rod 7 and the second sliding block 31, and the force loading driving mechanism 6 can be changed to control the magnitude of the acting force output by the first force loading assembly 4 and the second force loading assembly 5, so that the total loading force of the two loading channels is controlled. The first driving mechanism 22 is used for controlling the position of the first sliding block 21 on the first balance lever 2, the distance from the first sliding block 21 to the second end of the first balance lever 2 is always equal to the distance from the second sliding block 31 to the second end of the second balance lever 3 through the balance mechanism 8, the position of the first sliding block 21 is adjusted, the position of the second sliding block 31 is changed at the same time, the proportion of acting forces distributed to the first force loading assembly 4 and the second force loading assembly 5 is changed and adjusted through the position of the second sliding block 31, and the force distribution proportion of the first force loading assembly 4 and the second force loading assembly 5 can be calculated according to the lever principle. Finally, the control of the loading forces of the two channels is realized through one force control channel and one displacement control channel. When the loaded object has small deformation, the second balance lever 3 can rotate under the constraint of the balance mechanism 8 and the middle connecting rod 7, so that the self-adaptation to the deformation is realized.
When the object to be loaded is deformed or displaced slightly by the first force loading assembly 4 and the second force loading assembly 5, if the deformation or displacement is inconsistent along the application direction of the first force loading assembly 4 and the second force loading assembly 5, the second balance lever 3 and the first balance lever 2 will rotate relatively to adapt to the inconsistent deformation. When the deformation is small, the rotation of the second balance lever 3 has less influence on the force distribution ratio between the first force loading assembly 4 and the second force loading assembly 5, which can be considered to be kept unchanged in practical engineering.
In the embodiment of the application, the first force loading assembly 4 comprises two parallel first force loading rods, the same side end parts of the two first loading rods are coaxially hinged with the second end of the second balance lever 3, the other ends of the two first loading rods are hinged with the loaded object, the second loading assembly comprises two parallel second force loading rods, the same side end parts of the two second loading rods are coaxially hinged with the middle part of the second balance lever 3, and the other ends of the two second loading rods are hinged with the loaded object. The mounting frame 1 is hinged at a first end and a second end with a mounting plate 14, and the mounting plate 14 is used for fixedly mounting the whole device on an external fixing base to determine the space position of the whole device.
The force loading driving mechanism 6 is an actuator, a sleeve of the actuator is hinged to the second end of the mounting frame 1, a push rod of the actuator is hinged to the middle of the first balance lever 2, the supporting component 11 comprises a first supporting connecting rod 12 and a second supporting connecting rod 13, one ends of the first supporting connecting rod 12 and the second supporting connecting rod 13 are coaxially hinged to the first end of the first balance lever 2, the other ends of the first supporting connecting rod 12 and the second supporting connecting rod 13 are respectively hinged to the mounting frame 1, and the hinge points of the first supporting connecting rod 12 and the second supporting connecting rod 13, which are connected with the mounting frame 1, are arranged at intervals along the direction from the first end to the second end of the mounting frame 1. The expansion and contraction of the actuator changes the force to the first balance lever 2, and eventually changes the force of the first force loading assembly 4 and the second force loading assembly 5 to the loaded object.
In the embodiment of the application, the length of the first balance lever 2 is equal to that of the second balance lever 3, the hinge point of the first support link 12 and the mounting frame 1 is closer to the first end of the mounting frame 1 than the hinge point of the second support link 13 and the mounting frame 1, sliding rails are arranged on the first balance lever 2 and the second balance lever 3, and the first sliding block 21 and the second sliding block 31 are respectively arranged on the corresponding sliding rails in a sliding manner.
Wherein the hinge axis of the actuator, the hinge axis of the first support link 12 and the hinge axis of the second support link 13 are parallel to each other and are perpendicular to the length direction of the first balance lever 2 and the telescoping direction of the push rod of the actuator.
As shown in fig. 2 and 3, the balancing mechanism 8 includes a linkage assembly 81 and a telescopic rod 82.
The linkage assembly 81 includes a first balance link 811, a second balance link 812, a third balance link 813, and a fourth balance link 814, one end of the first balance link 811 is hinged to the first slider 21, and the hinge axes of the first balance link 811 and the first slider 21 are coaxial with one end of the intermediate link 7 and the hinge axis of the first slider 21, one end of the second balance link 812 is hinged to the second slider 31, the hinge axes of the second balance link 812 and the second slider 31 are coaxial with one end of the intermediate link 7 and the hinge axis of the second slider 31, the other end of the first balance link 811 is rotatably provided with a first gear 815, the other end of the second balance link 812 is rotatably provided with a second gear 816, the first gear 815 is meshed with the second gear 816, and a first stabilization link 83 is provided between the first gear 815 and the second gear 816, one end of the first stabilization link 83 is rotatably connected with the rotation axis of the first gear 815, and the other end of the first stabilization link 83 is rotatably connected with the rotation axis of the second gear 816.
One end of the third balance link 813 is hinged to the second end of the first balance lever 2, one end of the fourth balance link 814 is hinged to the second end of the second balance lever 3, a third gear 817 is rotatably disposed at the other end of the third balance link 813, a fourth gear 818 is rotatably disposed at the other end of the fourth balance link 814, the third gear 817 is meshed with the fourth gear 818, a second stabilizing link 84 is disposed between the third gear 817 and the fourth gear 818, one end of the second stabilizing link 84 is rotatably connected with a rotating shaft of the third gear 817, and the other end of the second stabilizing link 84 is rotatably connected with a rotating shaft of the fourth gear 818.
The telescopic rod 82 includes a sliding rod 821 and a sliding barrel 822 sleeved on the outer periphery of the sliding rod 821, the sliding rod 821 and the sliding barrel 822 are slidably arranged, one ends of the first stabilizing connecting rod 83 and the sliding rod 821 are fixedly connected, and the second stabilizing connecting rod 84 and the sliding barrel 822 are fixedly connected.
The hinge shafts of the first balance link 811, the second balance link 812, the third balance link 813, the fourth balance link 814, and the rotation shafts of the first gear 815, the second gear 816, the third gear 817, and the fourth gear 818 are parallel to each other and are perpendicular to the length direction of the first balance lever 2 and the output direction of the output shaft of the force loading driving mechanism 6, the pitch of the hinge shafts at both ends of the first balance link 811 is equal to the pitch of the hinge shafts at both ends of the second balance link 812, the pitch of the hinge shafts at both ends of the third balance link 813 is equal to the pitch of the hinge shafts at both ends of the fourth balance link 814, the numbers of teeth and the moduli of the first gear 815 and the second gear 816 are equal, and the numbers of teeth and the moduli of the third gear 817 and the fourth gear 818 are equal.
The balance mechanism 8 has the functions of firstly ensuring that the distance from the first sliding block 21 to one end of the first balance lever 2 is always equal to the distance from the second sliding block 31 to the second balance lever 3, and secondly ensuring that the included angle between the first balance lever 2 and the middle connecting rod 7 is equal to the included angle between the second balance lever 3 and the middle connecting rod 7. Thus, under the constraint of the intermediate link 7, the first balance lever 2 and the second balance lever 3 can only rotate relatively, and the mechanism can be equivalently hinged at the midpoint of the intermediate link 7 of the first balance lever 2 and the second balance lever 3 according to the three-center theorem. The first force loading component 4 and the second force loading component 5 on the second balance lever 3 are connected with the loaded object through a hinge, and the force distribution proportion of the two loading pull rod groups can be calculated according to the lever principle. In the embodiment of the present application, the restraining action of the linkage assembly 81 is independent of the length of the intermediate link 7. Therefore, if the intermediate link 7 is changed to a flexible member that can be stretched, such as an elastic rope, the function achieved by the intermediate link is still effective.
The balance mechanism 8 comprises two sets of linkage assemblies 81, two intermediate connecting rods 7 are arranged, the two intermediate connecting rods 7 are parallel and aligned, and the telescopic rod 82 is positioned between the two intermediate connecting rods 7.
Each set of linkage assemblies 81 comprises a first balance connecting rod 811, a second balance connecting rod 812, a third balance connecting rod 813 and a fourth balance connecting rod 814, a first gear 815, a second gear 816, a third gear 817, a fourth gear 818, a first stabilizing connecting rod 83 and a second stabilizing connecting rod 84, the rotating shafts of the two first gears 815, the rotating shafts of the two second gears 816, the rotating shafts of the two third gears 817 and the rotating shafts of the two fourth gears 818 of the two sets of linkage assemblies 81 are fixedly connected through connecting shafts 85 respectively, and the telescopic rod 82 is located between the two sets of linkage assemblies 81.
The second balance lever 3 is provided with a second driving mechanism 32 for driving the second slider 31 to slide along the length direction of the second balance lever 3. When the loading force is relatively large, the sliding resistance of the first slide block 21 and the second slide block 31 is increased, and in order to ensure that the distance from the first slide block 21 to the second end of the first balance lever 2 is always equal to the distance from the second slide block 31 to the second end of the second balance lever 3, the second driving mechanism 32 is added on the second balance lever 3, thereby providing an auxiliary effect for the movement of the second slide block 31 and improving the accuracy of two-channel force loading.
As shown in fig. 4, the first driving mechanism 22 and the second driving mechanism 32 are pneumatic actuators or hydraulic actuators, the front cavities of the first driving mechanism 22 and the second driving mechanism 32 are connected to the same medium conveying pipe 91 through one pipe 9, and the tail cavities of the first driving mechanism 22 and the second driving mechanism 32 are connected to another same medium conveying pipe 91 through another pipe 9. In the embodiment of the application, the first driving mechanism 22 and the second driving mechanism 32 are pneumatic actuators, and the two pneumatic actuators serving as the first driving mechanism 22 and the second driving mechanism 32 are connected, so that the synchronous operation of the first driving mechanism 22 and the second driving mechanism 32 is ensured, and the accuracy of the force loading of two channels is further improved.
The initial assembly position of the loading device according to the application should be such that the first force loading assembly 4, the second force loading assembly 5 and the intermediate link 7 are as parallel as possible in order to achieve a more accurate proportional distribution of the loading forces.
The foregoing is merely illustrative of the present application, and the present application is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present application should be included in the present application. Therefore, the protection scope of the application is subject to the protection scope of the claims.