Disclosure of Invention
The utility model provides a down-pressing type electric screwdriver, which is convenient to use and can prevent a screw from being damaged.
In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a down-pressure type electric screwdriver, includes shell, motor, pivot subassembly, planetary gear set, control circuit and depression bar, the depression bar passes through control circuit and connects in the motor, the motor passes through planetary gear set transmission and connects in pivot subassembly, be provided with the driving disk between planetary gear set and the pivot subassembly to connect in the pivot subassembly through the driving disk transmission, the pivot subassembly is including the main shaft and correspond to set up in main epaxial two reflectors, one of them the reflector can do fore-and-aft slip according to the main shaft axial, the shell inboard corresponds and is provided with two inductors, and two the inductor sets up respectively and corresponds two the reflector.
Further, the rotating shaft assembly comprises two abutting rings arranged on the main shaft at intervals, a spring is arranged between the two abutting rings, and one reflector is arranged on the abutting ring positioned at the lower part through a bracket.
Further, the rotating shaft assembly comprises a shaft sleeve sleeved on the main shaft and is rotationally connected to the main shaft, a groove is formed in the shaft sleeve, and the support is arranged in the groove.
Further, the transmission disc is provided with a protruding portion, the main shaft is provided with a disc which is abutted to the transmission disc, and the disc is provided with a groove corresponding to the protruding portion.
Further, one side of the disc, which is far away from the transmission disc, is abutted against an abutting ring positioned at the upper part of the main shaft.
Further, the control circuit is respectively connected to the two inductors.
Compared with the prior art, the utility model has the beneficial effects that: through the reflector that sets up on the main shaft, set up the inductor in the shell, make the inductor sense the reflector and then automatically drive motor through pushing down the main shaft, under the control mode prerequisite of remaining original hand press pole, provide the control mode of pushing down the main shaft more, make things convenient for the user to use, in the operation process, send stop command after a inductor sensed the reflector that corresponds, the motor stops the drive to reach the effect of screwing up back automatic stop, prevent to twist bad screw.
Drawings
Fig. 1 is a perspective view of the present utility model.
Fig. 2 is a cross-sectional view of the present utility model.
Fig. 3 is an exploded view of the present utility model.
Fig. 4 is an exploded view of a spindle assembly according to the present utility model.
Fig. 5 is a schematic structural view of a spindle according to the present utility model.
In the figure: the motor comprises a shell 1, a motor 2, a rotating shaft assembly 3, a planetary gear set 4, a control circuit 5, a pressing rod 6, a transmission disc 7, a main shaft 31, a reflector 32, an inductor 33, an abutting ring 34, a spring 35, a shaft sleeve 36, a disc 70, a ball bearing 88, a torsion adjusting mechanism 99, a screw tap 310, a bracket 320 and a pipe sleeve 340.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
As shown in the drawing, the utility model relates to a down-pressing type electric screwdriver, which comprises a shell 1, a motor 2, a rotating shaft assembly 3, a planetary gear set 4, a control circuit 5 and a pressing rod 6, wherein the pressing rod 6 is connected with the motor 2 through the control circuit 5, the motor 2 is connected with the rotating shaft assembly 3 through the planetary gear set 4 in a transmission way, a fixed sleeve and a torsion adjusting mechanism 99 for adjusting torsion are also arranged in the shell 1, the torsion adjusting mechanism 99 is of a prior structure and is not described herein, a driving disc 7 is arranged between the planetary gear set 4 and the rotating shaft assembly 3 and is connected with the rotating shaft assembly 3 through the driving disc 7 in a transmission way, a ball bearing 88 is arranged between the planetary gear set 4 and the driving disc 7, a center column is arranged at one side of the driving disc 7 and is inserted in the middle part of the planetary gear set 4, the driving disc 7 is ensured not to influence the rotation of the driving disc 7 when the driving disc 7 is tightly abutted against one side of the planetary gear set 4, the spindle assembly 3 includes a spindle 31, and two reflectors 32 disposed on the spindle 31, as shown in fig. 2 or 4, where the two reflectors 32 are disposed on two sides of the spindle 31, and one of the reflectors 32 can slide back and forth along the axial direction of the spindle 31, that is, the movable reflector 32 can slide up and down, and the mounting position of the movable reflector 32 is lower than that of the other reflector 32, the movable reflector 32 is used for controlling and driving the spindle 31, two sensors 33 are disposed on the inner side of the housing 1, the two sensors 33 can adopt sensing devices such as infrared sensors, and the two sensors 33 are disposed corresponding to the two reflectors 32, respectively, the user can press the pressing rod 6, and the control circuit 5 is connected to the motor 2 for controlling the operation of the motor 2 or stopping the control mode of the existing electric screwdriver, the main shaft 31 can be pressed down, one reflector 32 on the main shaft 31 can be moved up to the corresponding position sensed by the sensor 33, the sensor 33 senses that the rear driving motor 2 operates, the electric screwdriver can realize the control of the two control modes of the pressing down type of the main shaft 31 and the pressing down type of the hand pressing rod 6, and a plurality of control modes are provided for the user to select.
The utility model relates to a principle and an effect of a push-down type electric screwdriver, which are characterized in that a reflector 32 is arranged on a main shaft 31, an inductor 33 is arranged in a shell 1, the inductor 33 senses the reflector 32 by pushing down the main shaft 31, a motor 2 is automatically driven, on the premise of keeping the control mode of an original hand pressing rod 6, a control mode of pushing down the main shaft 31 is provided, the use of a user is facilitated, the user can select any mode to operate the screwdriver according to the situation, when the main shaft 31 is pushed down until one inductor 33 senses the corresponding reflector 32, the motor 2 drives the main shaft 31 to rotate, and a stop instruction is sent until the other inductor 33 senses the corresponding reflector 32, and the motor 2 stops driving, so that the effect of automatic stop after screwing is achieved, and screw breakage is prevented.
In this embodiment, the spindle assembly 3 includes two abutting rings 34 disposed at intervals on the spindle 31, a spring 35 is disposed between the two abutting rings 34, as shown in fig. 5, the two abutting rings 34 are disposed at intervals up and down, the spring 35 is disposed in the middle, the two abutting rings 34 and the spring 35 are both sleeved outside the spindle 31, one of the reflectors 32 is disposed on the lower abutting ring 34 through a bracket 320, when the spindle 31 is pressed down, the lower abutting ring 34 is lifted up, so that the inductor 33 can sense the reflectors 32, when the spindle 31 loses the pressing force, the lower abutting ring 34 returns to the original position due to the rebound force of the spring 35, the spindle assembly 3 includes a sleeve 36 sleeved on the spindle 31, the sleeve 36 is relatively fixed and does not rotate along with the spindle 31, and is rotatably connected with the spindle 31, the bracket 320 is disposed in the slot and slides in the slot, the sleeve 36 is fixedly mounted in the slot, and the bracket 320 is disposed in the slot, and the other end of the sleeve is fixed against the spindle 31 by the sleeve 340, and the other end of the sleeve is further fixed against the spindle assembly, and the other end of the sleeve 340 is fixed against the spindle 31 by the bearing sleeve 340.
In this embodiment, the driving disc 7 is provided with a protruding portion, the spindle 31 is provided with a disc 70 abutting against the driving disc 7, the disc 70 is provided with a groove corresponding to the protruding portion, one side of the disc 70 away from the driving disc 7 abuts against the abutting ring 34 located at the upper portion of the spindle 31, the abutting ring 34 at the upper portion can be fixed in position by the arrangement of the disc 70, the fixed end is used as a fixed end, and the other abutting ring 34 is used as a movable end to slide up and down on the abutting ring 34 at the upper portion.
In this embodiment, the control circuit 5 is respectively connected to two sensors 33, the control circuit 5 receives the instruction from the sensors 33 and drives the motor 2 to operate or stop, when the spindle 31 is pressed down until one of the sensors 33 senses the corresponding reflector 32, the sensor 33 sends the instruction, and drives the motor 2 to operate through the control circuit 5, so that the motor 2 is driven to the spindle 31 through the planetary gear set 4, and when the other sensor 33 senses the corresponding reflector 32, the control circuit 5 controls the motor 2 to stop.
When the screw driver is used, a user installs the screw driver head, the main shaft 31 presses down and pushes the screw against the installation hole site through the screw driver head, the main shaft 31 provided with the screw driver head is pushed upwards due to the reaction force, so that the lower abutting ring 34 is pushed up to the sensor 33 to sense the reflector 32 under the pushing of the pipe sleeve 340 of the rotating shaft assembly 3, the sensor 33 drives the motor 2 to operate through the control circuit 5, the motor 2 shaft drives the planetary gear set 4, after multiple gears, the rotating speed of the motor 2 is reduced, the torque is converted into the torque to be output to the driving disc 7, the driving disc 7 drives the tightly abutted main shaft 31 to rotate, the other sensor 33 controls the motor 2 to stop until the screw is screwed, the screw is prevented from being damaged, the other sensor 33 controls the motor 2 to stop through the sensing mode of the sensing reflector 32, for example, when the height of the movable reflector 32 is higher than that of the fixed reflector 32, the lower abutting ring 34 can be gradually lifted due to continuous screwing of the screw, and the movable reflector 32 is driven to be lifted to exceed the fixed reflector 32.
The above embodiments are preferred embodiments of the present utility model, and all similar structures and equivalent modifications are intended to fall within the scope of the present utility model.