CN103171613A - Vehicle steer-by-wire mode switching limit device - Google Patents

Abstract

Translated fromChinese

本发明公开了一种车辆线控转向模式切换限位装置，旨在实现方向盘在任意位置时转向模式切换和准确限位。直线导轨固定安装在箱体上，滑块滑动联接在直线导轨上，不完全齿条和滑块分别固定联接在行程挡板的两侧，行程挡板的下侧设置有长凹槽，长凹槽内设置有短凹槽，不完全齿轮固定联接在主动齿轮轴上，与不完全齿条啮合，挡块支撑座固定联接在箱体的底板上，限位挡块动配合安装在挡块支撑座上端的滑道内，弹簧安装在挡块支撑座的滑道内，从动架固定联接在限位挡块的下端，电机固定联接在挡块支撑座上，凸轮固定联接在电机的输出轴上，凸轮的外轮廓与从动架底部内表面动配合接触。本发明能实现方向盘在任意位置时转向模式切换和准确限位。

The invention discloses a control-by-wire steering mode switching limiting device for a vehicle, which aims to realize steering mode switching and accurate limiting when the steering wheel is in any position. The linear guide rail is fixedly installed on the box body, the slider is slidably connected to the linear guide rail, the incomplete rack and the slider are respectively fixedly connected to both sides of the travel baffle, and the lower side of the travel baffle is provided with a long groove. There is a short groove in the groove, the incomplete gear is fixedly connected to the driving gear shaft, and meshes with the incomplete rack, the stopper support seat is fixedly connected to the bottom plate of the box body, and the limit stopper is movable and installed on the stopper support In the slideway at the upper end of the seat, the spring is installed in the slideway of the block support seat, the driven frame is fixedly connected to the lower end of the limit stopper, the motor is fixedly connected to the stopper support seat, and the cam is fixedly connected to the output shaft of the motor. The outer contour of the cam is in moving contact with the inner surface of the bottom of the driven frame. The invention can realize steering mode switching and accurate limit when the steering wheel is in any position.

Description

Translated fromChinese

车辆线控转向模式切换限位装置Vehicle steering-by-wire mode switching limit device

技术领域technical field

本发明涉及一种限位装置，具体地说是一种车辆线控转向模式切换限位装置。The invention relates to a limiting device, in particular to a limiting device for switching a steering-by-wire mode of a vehicle.

背景技术Background technique

转向系统的功用是操纵车辆的行驶方向，系统应能根据需要保持车辆稳定地沿直线行驶，并能根据要求灵活地改变行驶方向。对转向系统的基本要求是操纵轻便灵活、工作稳定可靠、使用经济耐久，转向性能是保证车辆安全行驶，减轻驾驶员的劳动强度，提高作业生产率的重要因素。The function of the steering system is to control the driving direction of the vehicle. The system should be able to keep the vehicle running in a straight line stably and flexibly change the driving direction according to the requirements. The basic requirements for the steering system are light and flexible operation, stable and reliable operation, and economical and durable use. The steering performance is an important factor to ensure the safe driving of the vehicle, reduce the labor intensity of the driver, and improve the work productivity.

随着应用场合工况要求的提高和现代技术的发展，车辆各方面性能需要进一步提高，尤其是在转向系统方面，提出了转向稳定可靠、操作轻便灵活、转向功率足够大等的技术要求，而在工程车辆中原有的转向系统中存在着灵敏度不可调节、没有路感等问题。为提高车辆转向性能，科技工作者致力于研究线控转向技术。它是通过微电子技术连接并控制转向系统的各个元件来代替传统的机械或液压连接。由于取消了方向盘和转向轮之间的机械连接，完全摆脱了传统转向系统的各种限制，因此使车辆的设计、装配大为简化，而且还可以自由设计车辆转向的力传递特性和角传递特性，是车辆转向系统的重大革新。线控转向技术采用传感器记录驾驶者的转向数据，然后通过数据线将信号传递给车上的微控制单元MCU，MCU综合有关的信号做出判断，发出控制车辆转向的指令，然后MCU检测车辆转过的角度信号与给定指令比较，构成闭环反馈控制，实现稳定、安全高性能的转向动作。在一些工程车辆的线控转向系统中方向盘的转动角度范围可以根据实际工况进行调节，在高速行驶工况时，方向盘顺时针或逆时针转动范围为900°，单方向连续转动900°时，就达到车辆右全转向或左全转向的位置，在低速装载作业时，方向盘顺时针或逆时针转动范围为180°，单方向连续转动180°时，就达到车辆右全转向或左全转向的位置，当方向盘转到极限位置时需要有机械装置进行限位。现有的技术方案是方向盘带动齿轮转动，从而使与之啮合的齿条移动，通过在不同位置设置挡块来限定齿条的极限位置，来实现转向模式的切换。由于方向盘转动的角度大，故齿条的尺寸和所需的工作空间就会很大，然而驾驶室底板的空间有限，不易进行设计安装。在现有的技术方案中，方向盘必须回正到车辆可以直线行驶状态时的初始位置才能实现一种转向模式向另一种转向模式的切换，缺少了实用性。With the improvement of application conditions and the development of modern technology, the performance of all aspects of the vehicle needs to be further improved, especially in the steering system, the technical requirements of stable and reliable steering, light and flexible operation, and sufficient steering power are put forward. In the original steering system of engineering vehicles, there are problems such as non-adjustable sensitivity and no road feeling. In order to improve the steering performance of vehicles, scientific and technological workers are committed to researching steering-by-wire technology. It connects and controls various components of the steering system through microelectronics technology to replace traditional mechanical or hydraulic connections. Due to the cancellation of the mechanical connection between the steering wheel and the steering wheel, it completely gets rid of various restrictions of the traditional steering system, so the design and assembly of the vehicle are greatly simplified, and the force transmission characteristics and angle transmission characteristics of the vehicle steering can also be freely designed. , is a major innovation in the vehicle steering system. The steer-by-wire technology uses sensors to record the steering data of the driver, and then transmits the signal to the micro control unit MCU on the vehicle through the data line. The passed angle signal is compared with the given command to form a closed-loop feedback control to achieve a stable, safe and high-performance steering action. In the steer-by-wire system of some engineering vehicles, the range of rotation angle of the steering wheel can be adjusted according to the actual working conditions. In high-speed driving conditions, the range of rotation of the steering wheel clockwise or counterclockwise is 900°. It can reach the position of full right steering or full left steering of the vehicle. When loading at low speed, the steering wheel can rotate clockwise or counterclockwise within 180°. position, when the steering wheel is turned to the limit position, a mechanical device is required to limit the position. The existing technical solution is that the steering wheel drives the gear to rotate, so that the rack meshed with it moves, and the limit position of the rack is limited by setting stoppers at different positions to realize the switching of the steering mode. Because the angle of rotation of the steering wheel is large, the size of the rack and the required working space will be large, but the space of the cab floor is limited, so it is difficult to design and install. In the existing technical solutions, the steering wheel must return to the initial position when the vehicle can travel straight in a straight line to realize switching from one steering mode to another, which lacks practicability.

因此设计一种车辆线控转向模式切换限位装置变得非常有必要，有利于推动线控转向系统的开发、研制与应用。Therefore, it is very necessary to design a vehicle steering-by-wire mode switching limit device, which is conducive to promoting the development, development and application of the steering-by-wire system.

发明内容Contents of the invention

本发明提供的车辆线控转向模式切换限位装置，能够可靠地实现方向盘在任意位置时转向模式的切换，且限位准确，又能减少限位结构的长度，从而减小整个方向盘装置的体积，节省安装空间。The vehicle steer-by-wire mode switch limit device provided by the present invention can reliably realize the switch of the steering wheel when the steering wheel is in any position, and the limit is accurate, and can reduce the length of the limit structure, thereby reducing the volume of the entire steering wheel device , saving installation space.

为了解决上述技术问题，本发明采用下述技术方案：双向液压泵固定安装在箱体的底部，主动齿轮轴的下端通过联轴器与双向液压泵的输入轴固定联接，主动齿轮固定安装在主动齿轮轴上，从动齿轮轴通过轴承安装在箱体上部的轴承座内，从动齿轮固定安装在从动齿轮轴上，主动齿轮与从动齿轮啮合传动安装，角位移传感器固定安装在箱体的底部，角位移传感器的输入轴通过联轴器与从动齿轮轴的下端固定联接，该装置主要包括不完全齿轮、直线导轨、行程挡板、不完全齿条、挡块支撑座、从动架、凸轮、弹簧、限位挡块、电机和滑块，所述直线导轨固定安装在箱体上，所述滑块滑动联接在直线导轨上，所述行程挡板与不完全齿条的背面固定联接，所述行程挡板与滑块固定联接，所述行程挡板的下侧设置有一个长凹槽，又在长凹槽的长度方向中心位置对称切割掉长凹槽实体的一部分形成一个短凹槽，所述长凹槽的长度方向中心位置与短凹槽的长度方向中心位置相同，所述不完全齿轮固定联接在主动齿轮轴上，所述不完全齿轮与不完全齿条啮合传动安装，所述挡块支撑座固定联接在箱体的底板上，所述限位挡块动配合安装在挡块支撑座上端的滑道内，所述限位挡块为阶梯形状，所述弹簧安装在挡块支撑座上端的滑道内，所述弹簧的下端与滑道内的环台接触、另一端与限位挡块的阶梯端面接触，所述弹簧为压缩弹簧，所述从动架固定联接在限位挡块的下端，所述电机固定联接在挡块支撑座上，所述凸轮固定联接在电机的输出轴上，所述凸轮的外轮廓与从动架底部内表面动配合接触。In order to solve the above technical problems, the present invention adopts the following technical scheme: the two-way hydraulic pump is fixedly installed at the bottom of the box, the lower end of the drive gear shaft is fixedly connected with the input shaft of the two-way hydraulic pump through a coupling, and the drive gear is fixedly installed on the drive On the gear shaft, the driven gear shaft is installed in the bearing seat on the upper part of the box through bearings, the driven gear is fixedly installed on the driven gear shaft, the driving gear and the driven gear are meshed for transmission installation, and the angular displacement sensor is fixedly installed in the box The bottom of the angular displacement sensor, the input shaft of the angular displacement sensor is fixedly connected with the lower end of the driven gear shaft through a coupling. frame, cam, spring, limit stopper, motor and slider, the linear guide rail is fixedly installed on the box body, the slider is slidably connected to the linear guide rail, the travel baffle plate and the back of the incomplete rack Fixedly connected, the stroke baffle is fixedly connected with the slider, a long groove is arranged on the underside of the stroke baffle, and a part of the long groove entity is symmetrically cut off at the center of the length direction of the long groove to form a Short grooves, the center position of the long groove in the length direction is the same as the center position of the short groove in the length direction, the incomplete gear is fixedly connected to the driving gear shaft, and the incomplete gear meshes with the incomplete rack for transmission Installation, the stopper support seat is fixedly connected to the bottom plate of the box body, the limit stopper is movably installed in the slideway at the upper end of the stopper support seat, the limit stopper is in the shape of a ladder, and the spring is installed In the slideway at the upper end of the block support seat, the lower end of the spring is in contact with the ring platform in the slideway, and the other end is in contact with the stepped end face of the limit stopper. The spring is a compression spring, and the driven frame is fixedly connected to the The lower end of the limit block, the motor is fixedly connected to the block support seat, the cam is fixedly connected to the output shaft of the motor, and the outer contour of the cam is in moving contact with the inner surface of the bottom of the driven frame.

所述电机为舵机电机。所述不完全齿轮可以由对称分布的两段正常齿构成，当方向盘处于车辆可以直线行驶状态的位置时，使不完全齿轮的一段正常齿与不完全齿条处于开始进入啮合的位置配合安装。所述不完全齿轮也可由一段正常齿构成，O-O线是一条与不完全齿轮轴心线垂直相交、且平行于不完全齿条的安装标志线，当方向盘处于车辆可以直线行驶状态的位置时，经过不完全齿轮正常齿段长度方向中心的径向线垂直于O-O线，并且不完全齿轮正常齿段与不完全齿条分居O-O线的两侧。当方向盘处于车辆可以直线行驶状态的位置时，不完全齿条和行程挡板处于初始位置，此时所述行程挡板下侧短凹槽长度方向的中心位置处于限位挡块的轴心线上。所述限位挡块上端为长方体形状，下端为圆柱体形状，所述弹簧套装在限位挡块的下端圆柱体形状部位。所述直线导轨是T型直线导轨也可以是方型直线导轨。The motor is a steering gear motor. The incomplete gear can be composed of two sections of normal teeth symmetrically distributed. When the steering wheel is in a position where the vehicle can drive straight, a section of normal teeth of the incomplete gear is installed in cooperation with the incomplete rack at the position where it starts to mesh. The incomplete gear can also be composed of a section of normal teeth. The O-O line is an installation marking line perpendicular to the axis of the incomplete gear and parallel to the incomplete rack. When the steering wheel is in a position where the vehicle can drive straight, The radial line passing through the center of the length direction of the normal tooth segment of the incomplete gear is perpendicular to the O-O line, and the normal tooth segment of the incomplete gear and the incomplete rack are separated on both sides of the O-O line. When the steering wheel is in the position where the vehicle can drive straight, the incomplete rack and the stroke baffle are in the initial position, and the center position of the short groove on the lower side of the stroke baffle in the length direction is at the axis line of the stopper superior. The upper end of the limit block is in the shape of a cuboid, and the lower end is in the shape of a cylinder, and the spring is sleeved on the lower end of the limit block in the shape of a cylinder. The linear guide is a T-shaped linear guide or a square linear guide.

采用本发明的有益效果是，能很好地实现方向盘在任意位置时转向模式的切换，且限位准确，又能减少限位机构的长度，从而减小整个方向盘装置的体积，节省安装空间，有很好的推广应用价值。The beneficial effect of adopting the present invention is that the switching of the steering mode when the steering wheel is in any position can be well realized, and the limit is accurate, and the length of the limit mechanism can be reduced, thereby reducing the volume of the entire steering wheel device and saving installation space. It has good promotion and application value.

下面结合附图和具体实施方式对本发明作进一步详细说明。The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

附图说明Description of drawings

图1是本发明所述车辆线控转向模式切换限位装置的主视图；Fig. 1 is a front view of the vehicle steering-by-wire mode switching limiting device according to the present invention;

图2是本发明所述车辆线控转向模式切换限位装置的左视图；Fig. 2 is a left view of the vehicle steering-by-wire mode switching limiting device according to the present invention;

图3是图1中第一个实施例的A-A剖视图；Fig. 3 is the A-A cross-sectional view of the first embodiment in Fig. 1;

图4是图1中第二个实施例的A-A剖视图。Fig. 4 is A-A sectional view of the second embodiment in Fig. 1 .

图中：箱体1  主动齿轮2  不完全齿轮3  主动齿轮轴4  从动齿轮5  从动齿轮轴6直线导轨7  角位移传感器8  行程挡板9  不完全齿条10  挡块支撑座11  双向液压泵12从动架13  凸轮14  弹簧15  限位挡块16  电机17  滑块18In the figure:box body 1driving gear 2incomplete gear 3driving gear shaft 4 drivengear 5 drivengear shaft 6linear guide rail 7angular displacement sensor 8stroke baffle 9incomplete rack 10block support seat 11 bidirectionalhydraulic pump 12 drivenframe 13cam 14spring 15limit block 16motor 17slide block 18

具体实施方式Detailed ways

在图1和图2中，双向液压泵12通过螺栓固定安装在箱体1的底部，主动齿轮轴4的下端通过联轴器与双向液压泵12的输入轴固定联接，主动齿轮2通过键固定安装在主动齿轮轴4上，从动齿轮轴6通过轴承安装在箱体1上部的轴承座内，从动齿轮5通过键固定安装在从动齿轮轴6上，主动齿轮2与从动齿轮5啮合传动安装，角位移传感器8通过螺栓固定安装在箱体1的底部，角位移传感器8的输入轴通过联轴器与从动齿轮轴6的下端固定联接，该装置主要由不完全齿轮3、直线导轨7、行程挡板9、不完全齿条10、挡块支撑座11、从动架13、凸轮14、弹簧15、限位挡块16、电机17和滑块18组成，所述直线导轨7通过螺栓固定安装在箱体1上，所述滑块18滑动联接在直线导轨7上，所述行程挡板9与不完全齿条10的背面通过螺栓固定联接，所述行程挡板9与滑块18通过螺栓固定联接，所述行程挡板9的下侧铣削加工出一个长凹槽，又在长凹槽的长度方向中心位置对称铣削加工掉长凹槽实体的一部分形成一个短凹槽，所述长凹槽的长度方向中心位置与短凹槽的长度方向中心位置相同，所述不完全齿轮3通过键固定联接在主动齿轮轴4上，所述不完全齿轮3与不完全齿条10啮合传动安装，所述挡块支撑座11通过螺栓固定联接在箱体1的底板上，所述限位挡块16动配合安装在挡块支撑座11上端的滑道内，所述限位挡块16为阶梯形状，所述弹簧15安装在挡块支撑座11上端的滑道内，所述弹簧15的下端与滑道内的环台接触、另一端与限位挡块16的阶梯端面接触，所述弹簧15为压缩弹簧，所述从动架13通过螺栓固定联接在限位挡块16的下端，所述电机17通过螺栓固定联接在挡块支撑座11上，所述凸轮14通过键固定联接在电机17的输出轴上，所述凸轮14的外轮廓与从动架13底部内表面动配合接触。In Fig. 1 and Fig. 2, the two-wayhydraulic pump 12 is fixedly installed on the bottom of thebox body 1 by bolts, the lower end of thedriving gear shaft 4 is fixedly connected with the input shaft of the two-wayhydraulic pump 12 through a coupling, and thedriving gear 2 is fixed by a key Installed on thedriving gear shaft 4, the drivengear shaft 6 is installed in the bearing seat on the upper part of thebox body 1 through bearings, the drivengear 5 is fixedly installed on the drivengear shaft 6 through a key, thedriving gear 2 and the drivengear 5 Mesh transmission installation, theangular displacement sensor 8 is fixedly installed on the bottom of thebox body 1 by bolts, the input shaft of theangular displacement sensor 8 is fixedly connected with the lower end of the drivengear shaft 6 through a coupling, the device is mainly composed ofincomplete gear 3, Thelinear guide rail 7, thestroke baffle plate 9, theincomplete rack 10, theblock support seat 11, the drivenframe 13, thecam 14, thespring 15, thelimit stopper 16, themotor 17 and theslide block 18, thelinear guide rail 7 is fixedly installed on thebox body 1 by bolts, theslider 18 is slidably connected to thelinear guide rail 7, thestroke baffle 9 and the back of theincomplete rack 10 are fixedly connected by bolts, thestroke baffle 9 and the Theslider 18 is fixedly connected by bolts, and a long groove is milled on the lower side of thestroke baffle 9, and a part of the long groove entity is symmetrically milled at the center of the length direction of the long groove to form a short groove , the longitudinal center position of the long groove is the same as the lengthwise center position of the short groove, theincomplete gear 3 is fixedly connected to thedriving gear shaft 4 through a key, and theincomplete gear 3 and theincomplete rack 10 meshing transmission installation, thestopper support seat 11 is fixedly connected to the bottom plate of thebox body 1 by bolts, thelimit stopper 16 is movably mounted in the slideway at the upper end of thestopper support seat 11, and thelimit stopper Block 16 is a stepped shape, and thespring 15 is installed in the slideway at the upper end of theblock support seat 11. The lower end of thespring 15 is in contact with the ring platform in the slideway, and the other end is in contact with the stepped end face of thelimit block 16. Thespring 15 is a compression spring, the drivenframe 13 is fixedly connected to the lower end of thelimit block 16 through bolts, themotor 17 is fixedly connected to theblock support seat 11 through bolts, and thecam 14 is fixedly connected through a key On the output shaft of themotor 17 , the outer contour of thecam 14 is in moving contact with the inner surface of the bottom of the drivenframe 13 .

另外，所述电机17为舵机电机。当方向盘处于车辆可以直线行驶状态的位置时，不完全齿条10和行程挡板9处于初始位置，此时所述行程挡板9下侧短凹槽长度方向的中心位置处于限位挡块16的轴心线上。所述限位挡块16上端为长方体形状，下端为圆柱体形状，所述弹簧15套装在限位挡块16的下端圆柱体形状部位。所述直线导轨7是T型直线导轨也可以是方型直线导轨。In addition, themotor 17 is a servo motor. When the steering wheel is in the position where the vehicle can travel straight, theincomplete rack 10 and thestroke baffle 9 are in the initial position, and the center position of the short groove length direction on the lower side of thestroke baffle 9 is at thelimit block 16 on the axis. The upper end of thelimiting block 16 is in the shape of a cuboid, and the lower end is in the shape of a cylinder. Thespring 15 is sleeved on the lower end of the limitingblock 16 in the shape of a cylinder. Thelinear guide 7 is a T-shaped linear guide or a square linear guide.

在图3所示的第一个实施例中，所述不完全齿轮3由对称分布的两段正常齿构成，当方向盘处于车辆可以直线行驶状态的位置时，使不完全齿轮3的一段正常齿与不完全齿条10处于开始进入啮合的位置配合安装。在图4所示的第二个实施例中，所述不完全齿轮3由一段正常齿构成，划出一条与不完全齿轮3轴心线垂直相交、且平行于不完全齿条10的安装标志线O-O，当方向盘处于车辆可以直线行驶状态的位置时，经过不完全齿轮3正常齿段长度方向中心的径向线垂直于O-O线，并且不完全齿轮3正常齿段与不完全齿条10分居O-O线的两侧。In the first embodiment shown in FIG. 3 , theincomplete gear 3 is composed of two sections of normal teeth symmetrically distributed. It is installed in cooperation with theincomplete rack 10 at the position where it starts to engage. In the second embodiment shown in FIG. 4 , theincomplete gear 3 is composed of a section of normal teeth, and an installation mark perpendicular to the axis line of theincomplete gear 3 and parallel to theincomplete rack 10 is drawn. Line O-O, when the steering wheel is at the position where the vehicle can drive straight, the radial line passing through the center of the length direction of the normal tooth segment of theincomplete gear 3 is perpendicular to the O-O line, and the normal tooth segment of theincomplete gear 3 is separated from theincomplete rack 10 Both sides of the O-O line.

方向盘带动主动齿轮轴4上的主动齿轮2旋转，从而使与之啮合的从动齿轮5转过一定角度，由于角位移传感器8的输入轴通过联轴器与从动齿轮轴6固定联接，故角位移传感器8就可以检测到从动齿轮5的旋转角度并输出电信号，根据传动比可得到方向盘的转动角度。车辆的其它执行机构根据此角度信号完成车辆的转向，双向液压泵12通过与其它控制元件的配合为驾驶员提供路感。当车辆转向需要切换到高速行驶模式时，电机17带动凸轮14转动，使得凸轮14的最高点作用到从动架13底部内表面上，从而使限位挡块16向下移动克服弹簧力退回到行程挡板9上的长凹槽内，限制行程挡板9在长凹槽的范围内移动，实现模式切换，当方向盘处于车辆可以直线行驶状态的位置时，方向盘可以在顺时针或逆时针900°范围内转动，单方向连续转动900°时，达到车辆右全转向或左全转向位置，转动过程中使得与主动齿轮轴4固定联接的不完全齿轮3转过相应角度，不完全齿轮3与不完全齿条10啮合传动带动与不完全齿条10固定联接的行程挡板9间歇移动，达到900°极限位置时，限位挡块16与行程挡板9上的长凹槽的一个侧壁面接触，限制行程挡板9继续移动，方向盘亦不能继续向前转动，但可以反方向回转，此时方向盘的灵敏度较低以保证高速转场行驶过程的安全性。当车辆转向需要切换到装载模式时，电机17带动凸轮14转动，使得凸轮14的最低点作用到从动架13底部内表面上，若此时限位挡块16在行程挡板9的短凹槽范围内，在弹簧15的作用下限位挡块16伸出，直接进入短凹槽，实现模式切换；若此时限位挡块16不在行程挡板9的短凹槽范围内，弹簧15使得限位挡块16压在长凹槽的顶部，当在方向盘的作用下行程挡板9的短凹槽到达限位挡块16所在位置时，弹簧15将限位挡块16弹入短凹槽，实现模式切换，此时，方向盘可以在顺时针或逆时针180°范围内转动，单方向连续转动180°时，达到车辆右全转向或左全转向位置，使行程挡板9到达极限位置，限位挡块16与行程挡板9上的短凹槽的一个侧壁面接触，限制行程挡板9继续移动，方向盘亦不能继续向前转动，但可以反方向回转，此时方向盘的灵敏度较高，可以降低装载过程中频繁转向的作业强度，提高作业效率。The steering wheel drives thedriving gear 2 on thedriving gear shaft 4 to rotate, so that the drivengear 5 meshing with it rotates through a certain angle. Since the input shaft of theangular displacement sensor 8 is fixedly connected with the drivengear shaft 6 through a coupling, Theangular displacement sensor 8 can detect the rotation angle of the drivengear 5 and output an electric signal, and the rotation angle of the steering wheel can be obtained according to the transmission ratio. Other actuators of the vehicle complete the steering of the vehicle according to the angle signal, and the two-wayhydraulic pump 12 provides road sense for the driver by cooperating with other control elements. When the vehicle turns and needs to switch to the high-speed driving mode, themotor 17 drives thecam 14 to rotate, so that the highest point of thecam 14 acts on the inner surface of the bottom of the drivenframe 13, so that thelimit block 16 moves downward to overcome the spring force and returns to In the long groove on thestroke baffle 9, the movement of thestroke baffle 9 within the range of the long groove is restricted to realize mode switching. When the steering wheel is in a position where the vehicle can drive straight, the steering wheel can be rotated clockwise or counterclockwise by 90°. Rotate within the range of 900° in one direction and continuously rotate 900° in one direction to reach the full right steering or full left steering position of the vehicle. During the rotation process, theincomplete gear 3 fixedly connected with thedriving gear shaft 4 is rotated through the corresponding angle, and theincomplete gear 3 and the The meshing transmission of theincomplete rack 10 drives thestroke baffle 9 fixedly connected with theincomplete rack 10 to move intermittently. Contact, limitstroke baffle plate 9 and continue to move, steering wheel also can not continue to rotate forward, but can turn around in the opposite direction, and now the sensitivity of steering wheel is lower to guarantee the safety of high-speed transition driving process. When the vehicle turns and needs to be switched to the loading mode, themotor 17 drives thecam 14 to rotate, so that the lowest point of thecam 14 acts on the inner surface of the bottom of the drivenframe 13. Within the range, under the action of thespring 15, thelimit block 16 stretches out and directly enters the short groove to realize mode switching;Stopper 16 is pressed on the top of long groove, and when the short groove oftravel baffle plate 9 reaches the position oflimit stopper 16 under the action of steering wheel,spring 15 bounces limitstopper 16 into short groove, realizes Mode switching, at this time, the steering wheel can be rotated in the range of 180° clockwise or counterclockwise, and when it is continuously rotated 180° in one direction, it will reach the right full steering or left full steering position of the vehicle, so that thetravel baffle 9 reaches the limit position, thelimit position Stopper 16 contacts with a side wall surface of the short groove on thestroke baffle 9, restricts thestroke baffle 9 to continue to move, and the steering wheel cannot continue to rotate forward, but can turn in the opposite direction. Reduce the work intensity of frequent steering during loading and improve work efficiency.

在方向盘连续旋转的过程中，行程挡板9是间歇运动的，所以只需要较小的行程挡板9即可完成限位工作，减小了长度尺寸，从而减小整个方向盘装置的体积，节省安装空间，同时实现方向盘在任意位置时转向模式切换和准确限位的目的。During the continuous rotation of the steering wheel, thestroke baffle 9 moves intermittently, so only asmall stroke baffle 9 is needed to complete the limit work, which reduces the length, thereby reducing the volume of the entire steering wheel device and saving The installation space, and at the same time realize the purpose of steering mode switching and accurate limit when the steering wheel is in any position.

Claims (8)

Translated fromChinese

1.一种车辆线控转向模式切换限位装置，双向液压泵(12)固定安装在箱体(1)的底部，主动齿轮轴(4)的下端通过联轴器与双向液压泵(12)的输入轴固定联接，主动齿轮(2)固定安装在主动齿轮轴(4)上，从动齿轮轴(6)通过轴承安装在箱体(1)上部的轴承座内，从动齿轮(5)固定安装在从动齿轮轴(6)上，主动齿轮(2)与从动齿轮(5)啮合传动安装，角位移传感器(8)固定安装在箱体(1)的底部，角位移传感器(8)的输入轴通过联轴器与从动齿轮轴(6)的下端固定联接，其特征是，主要由不完全齿轮(3)、直线导轨(7)、行程挡板(9)、不完全齿条(10)、挡块支撑座(11)、从动架(13)、凸轮(14)、弹簧(15)、限位挡块(16)、电机(17)和滑块(18)组成，所述直线导轨(7)固定安装在箱体(1)上，所述滑块(18)滑动联接在直线导轨(7)上，所述行程挡板(9)与不完全齿条(10)的背面固定联接，所述行程挡板(9)与滑块(18)固定联接，所述行程挡板(9)的下侧设置有一个长凹槽，又在长凹槽的长度方向中心位置对称切割掉长凹槽实体的一部分形成一个短凹槽，所述长凹槽的长度方向中心位置与短凹槽的长度方向中心位置相同，所述不完全齿轮(3)固定联接在主动齿轮轴(4)上，所述不完全齿轮(3)与不完全齿条(10)啮合传动安装，所述挡块支撑座(11)固定联接在箱体(1)的底板上，所述限位挡块(16)动配合安装在挡块支撑座(11)上端的滑道内，所述限位挡块(16)为阶梯形状，所述弹簧(15)安装在挡块支撑座(11)上端的滑道内，所述弹簧(15)的下端与滑道内的环台接触、另一端与限位挡块(16)的阶梯端面接触，所述弹簧(15)为压缩弹簧，所述从动架(13)固定联接在限位挡块(16)的下端，所述电机(17)固定联接在挡块支撑座(11)上，所述凸轮(14)固定联接在电机(17)的输出轴上，所述凸轮(14)的外轮廓与从动架(13)底部内表面动配合接触。1. A vehicle steering-by-wire mode switching limit device, the two-way hydraulic pump (12) is fixedly installed on the bottom of the box (1), and the lower end of the driving gear shaft (4) is connected to the two-way hydraulic pump (12) through a coupling The input shaft is fixedly connected, the driving gear (2) is fixedly installed on the driving gear shaft (4), the driven gear shaft (6) is installed in the bearing seat on the upper part of the box body (1) through the bearing, and the driven gear (5) It is fixedly installed on the driven gear shaft (6), the driving gear (2) is engaged with the driven gear (5) for transmission installation, the angular displacement sensor (8) is fixedly installed on the bottom of the box body (1), and the angular displacement sensor (8) )’s input shaft is fixedly connected with the lower end of the driven gear shaft (6) through a coupling, which is characterized in that it is mainly composed of incomplete gears (3), linear guides (7), travel baffles (9), incomplete gears bar (10), block support seat (11), driven frame (13), cam (14), spring (15), limit stop (16), motor (17) and slide block (18), The linear guide rail (7) is fixedly installed on the box body (1), the slider (18) is slidably connected to the linear guide rail (7), and the stroke baffle (9) and the incomplete rack (10) The back side of the stroke baffle (9) is fixedly connected with the slider (18), and the underside of the stroke baffle (9) is provided with a long groove, and at the center of the length direction of the long groove A part of the long groove entity is cut symmetrically to form a short groove, the center position of the length direction of the long groove is the same as that of the short groove, and the incomplete gear (3) is fixedly connected to the driving gear shaft (4), the incomplete gear (3) is meshed with the incomplete rack (10) for transmission installation, the stopper support seat (11) is fixedly connected to the bottom plate of the box (1), and the limit The stopper (16) is installed in the slideway at the upper end of the stopper support seat (11) with a moving fit, the limit stopper (16) is in the shape of a step, and the spring (15) is installed at the upper end of the stopper support seat (11) In the slideway, the lower end of the spring (15) is in contact with the ring platform in the slideway, and the other end is in contact with the stepped end face of the limit stopper (16), the spring (15) is a compression spring, and the driven frame (13) is fixedly connected to the lower end of the limit block (16), the motor (17) is fixedly connected to the block support seat (11), and the cam (14) is fixedly connected to the output shaft of the motor (17) Above, the outer contour of the cam (14) is in moving contact with the inner surface of the bottom of the driven frame (13).2.根据权利要求1所述的车辆线控转向模式切换限位装置，其特征是：所述电机(17)为舵机电机。2. The vehicle steering-by-wire mode switching limiting device according to claim 1, characterized in that: the motor (17) is a steering gear motor.3.根据权利要求1所述的车辆线控转向模式切换限位装置，其特征是：所述不完全齿轮(3)由对称分布的两段正常齿构成，当方向盘处于车辆可以直线行驶状态的位置时，使不完全齿轮(3)的一段正常齿与不完全齿条(10)处于开始进入啮合的位置配合安装。3. The vehicle steering-by-wire mode switch limiting device according to claim 1, characterized in that: the incomplete gear (3) is composed of two sections of normal teeth symmetrically distributed, when the steering wheel is in the state where the vehicle can drive straight During position, make a section of normal tooth of incomplete gear (3) and incomplete rack (10) be in the position that starts to enter engagement and cooperate to install.4.根据权利要求1所述的车辆线控转向模式切换限位装置，其特征是：所述不完全齿轮(3)由一段正常齿构成，O-O线是一条与不完全齿轮(3)轴心线垂直相交、且平行于不完全齿条(10)的安装标志线，当方向盘处于车辆可以直线行驶状态的位置时，经过不完全齿轮(3)正常齿段长度方向中心的径向线垂直于O-O线，并且不完全齿轮(3)正常齿段与不完全齿条(10)分居O-O线的两侧。4. The vehicle steering-by-wire mode switching limiting device according to claim 1, characterized in that: the incomplete gear (3) is composed of a section of normal teeth, and the O-O line is a line connected to the axis of the incomplete gear (3). The lines intersect vertically and are parallel to the installation marking line of the incomplete rack (10). When the steering wheel is in the position where the vehicle can drive straight, the radial line passing through the lengthwise center of the normal tooth segment of the incomplete gear (3) is perpendicular to O-O line, and the normal tooth segment of the incomplete gear (3) and the incomplete rack (10) are separated on both sides of the O-O line.5.根据权利要求1所述的车辆线控转向模式切换限位装置，其特征是：当方向盘处于车辆可以直线行驶状态的位置时，不完全齿条(10)和行程挡板(9)处于初始位置，此时所述行程挡板(9)下侧短凹槽长度方向的中心位置处于限位挡块(16)的轴心线上。5. The vehicle steering-by-wire mode switching limiting device according to claim 1, characterized in that: when the steering wheel is in the position where the vehicle can drive straight, the incomplete rack (10) and the travel baffle (9) are in the position of In the initial position, at this time, the center position in the length direction of the short groove on the lower side of the stroke baffle (9) is on the axis of the limit stopper (16).6.根据权利要求1所述的车辆线控转向模式切换限位装置，其特征是：所述限位挡块(16)上端为长方体形状，下端为圆柱体形状，所述弹簧(15)套装在限位挡块(16)的下端圆柱体形状部位。6. The vehicle steering-by-wire mode switching limiting device according to claim 1, characterized in that: the upper end of the limiting block (16) is in the shape of a cuboid, the lower end is in the shape of a cylinder, and the spring (15) is set At the lower end cylinder shape position of limit stopper (16).7.根据权利要求1所述的车辆线控转向模式切换限位装置，其特征是：所述直线导轨(7)为T型直线导轨。7. The vehicle steering-by-wire mode switching limiting device according to claim 1, characterized in that: the linear guide rail (7) is a T-shaped linear guide rail.8.根据权利要求1所述的车辆线控转向模式切换限位装置，其特征是：所述直线导轨(7)为方型直线导轨。8. The vehicle steering-by-wire mode switching limiting device according to claim 1, characterized in that: the linear guide rail (7) is a square linear guide rail.

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