CN103158754A - Vehicle steering wheel limit device - Google Patents

Abstract

Translated fromChinese

本发明公开了一种车辆转向方向盘限位装置，旨在实现方向盘在任意位置时转向模式切换和准确限位。小齿轮固定联接在主动齿轮轴上，滚珠座固定安装在箱体底板上，滚珠压盖固定联接在滚珠座上，环形挡板滑动联接在滚珠座和滚珠压盖之间，环形挡板上部固定有内齿轮，底部设置有长凹槽，长凹槽内设置有短凹槽，内齿轮与小齿轮啮合传动安装，支撑座固定安装在箱体上，限位挡块动配合安装在支撑座的滑道内，弹簧安装在支撑座的滑道内，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 limiting device for a steering wheel of a vehicle, which aims at realizing switching of steering modes and accurate limiting when the steering wheel is in any position. The pinion is fixedly connected to the driving gear shaft, the ball seat is fixedly installed on the bottom plate of the box body, the ball gland is fixedly connected to the ball seat, the ring baffle is slidably connected between the ball seat and the ball gland, and the upper part of the ring baffle is fixed There is an internal gear, the bottom is provided with a long groove, and the long groove is provided with a short groove, the internal gear and the pinion are meshed for transmission installation, the support seat is fixedly installed on the box body, and the limit stopper is dynamically fitted on the support seat. In the slideway, the spring is installed in the slideway of the support seat, the driven frame is fixedly connected to the lower end of the limit stopper, the motor is fixedly connected to the support seat, and the cam is fixedly connected to the output shaft of the motor. The inner surface of the frame bottom is in dynamic fit contact. The invention can realize steering mode switching and accurate limit when the steering wheel is in any position.

Description

Translated fromChinese

车辆转向方向盘限位装置Vehicle steering wheel limiting 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转向方向盘限位装置。The invention relates to a limiting device, in particular to a limiting device for a steering wheel 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，达到车辆右全转向或左全转向位置，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，达到车辆右全转向或左全转向位置，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，缺少了灵活性和实用性。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°. The right or left full steering position of the vehicle is reached. During low-speed loading operations, the steering wheel can rotate 180° clockwise or counterclockwise. When turning 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 order to realize the switching from one steering mode to another, which lacks flexibility and practicability.

因此设计一种车辆转向方向盘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 wheel limiting 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

本发明提供的车辆转向方向盘限位装置，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。The vehicle steering wheel limiting device provided by the present invention can reliably realize the switching of the steering mode when the steering wheel is in any position, and the limiting is accurate, and the length of the limiting mechanism can be reduced, thereby reducing the volume of the entire steering wheel device and 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，该装置主要包括内齿轮、滚珠压盖、支撑座、凸轮、从动架、弹簧、限位挡块、小齿轮、环形挡板、滚珠座、下滚珠、上滚珠和电机，所述小齿轮固定联接在主动齿轮轴上，所述滚珠座通过支架固定安装在箱体的底板上，所述滚珠压盖固定联接在滚珠座上，所述下滚珠以最小间隙在滚珠座的环槽内安放一圈，所述上滚珠以最小间隙在滚珠压盖的环槽内安放一圈，所述环形挡板通过下滚珠和上滚珠活动联接在滚珠座和滚珠压盖之间，所述环形挡板底部沿圆周方向设置有一个长凹槽，又在长凹槽的长度方向中心位置沿圆周方向对称切割出一个短凹槽，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，所述内齿轮固定安装在环形挡板上，所述内齿轮与小齿轮啮合传动安装，所述支撑座固定安装在箱体的底板上，所述限位挡块动配合安装在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 At the bottom of the bottom, the input shaft of the angular displacement sensor is fixedly connected with the lower end of the driven gear shaft through a coupling. The device mainly includes an internal gear, a ball gland, a support seat, a cam, a driven frame, a spring, a limit stopper, Pinion, annular baffle, ball seat, lower ball, upper ball and motor, the pinion is fixedly connected on the drive gear shaft, the ball seat is fixedly installed on the bottom plate of the box through a bracket, the ball gland Fixedly connected to the ball seat, the lower ball is placed in the ring groove of the ball seat with the smallest gap, the upper ball is placed in the ring groove of the ball gland with the smallest gap, and the ring baffle passes through The lower ball and the upper ball are movably connected between the ball seat and the ball gland. A long groove is arranged at the bottom of the annular baffle along the circumferential direction, and a groove is cut symmetrically along the circumferential direction at the center of the long groove in the length direction. The short groove, the center position of the length direction of the long groove is the same as the length direction center position of the short groove, the internal gear is fixedly installed on the annular baffle, the internal gear is meshed with the pinion gear and installed for transmission, the The support seat is fixedly installed on the bottom plate of the box body, the limit stopper is movably installed in the slideway at the upper end of the support seat, the limit stopper is in the shape of a step, and the spring is installed in the slideway at the upper end of the 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 surface of the limit block. The spring is a compression spring, and the driven frame is fixedly connected to the lower end of the limit block. The motor The cam is fixedly connected to the support base, 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。当方向盘处于车辆可以直线行驶状态的位置时，环形挡板和内齿轮处于初始位置，此时所述环形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。所述滚珠座为圆环形状结构。所述环形挡板为圆环形状结构。所述内齿轮与环形挡板同轴心线安装。The motor is a steering gear motor. When the steering wheel is in the position where the vehicle can run straight, the ring baffle and the internal gear are in the initial position, and the center position of the short groove on the lower side of the ring baffle in the length direction is on the axis line of the stopper. 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 ball seat is in the shape of a ring. The annular baffle is a ring-shaped structure. The internal gear is installed coaxially with the annular baffle.

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，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，且限位准确，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 can be well realized when the steering wheel is in any position, the length of the limit mechanism is reduced, thereby reducing the volume of the entire steering wheel device, saving installation space, and the limit is accurate, which has great advantages. 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是本发明所述车辆转向方向盘限位装置的主视图；Fig. 1 is the front view of the vehicle steering wheel limiting device of the present invention;

图2是图1中的A-A剖视图；Fig. 2 is A-A sectional view among Fig. 1;

图3是图1中的B-B剖视图。Fig. 3 is a B-B sectional view in Fig. 1 .

图中：箱体1  主动齿轮2  主动齿轮轴3  内齿轮4  滚珠压盖5  从动齿轮轴6  从动齿轮7  角位移传感器8  支撑座9  凸轮10  从动架11  弹簧12  限位挡块13  双向液压泵14  小齿轮15  环形挡板16  滚珠座17  下滚珠18  上滚珠19  电机20In the figure: box body 1driving gear 2driving gear shaft 3internal gear 4ball gland 5 drivengear shaft 6 drivengear 7angular displacement sensor 8support seat 9cam 10 drivenframe 11 spring 12limit stopper 13 bidirectionalHydraulic pump 14pinion 15annular baffle 16ball seat 17lower ball 18upper ball 19 motor 20

具体实施方式Detailed ways

在图1、图2和图3中，双向液压泵14通过螺栓固定安装在箱体1的底部，主动齿轮轴3的下端通过联轴器与双向液压泵14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3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7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7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，该装置主要由内齿轮4、滚珠压盖5、支撑座9、凸轮10、从动架11、弹簧12、限位挡块13、小齿轮15、环形挡板16、滚珠座17、下滚珠18、上滚珠19和电机20组成，所述小齿轮15通过键固定联接在主动齿轮轴3上，所述滚珠座17通过支架采用螺栓固定安装在箱体1的底板上，所述滚珠压盖5通过螺栓固定联接在滚珠座17上，所述下滚珠18以最小间隙在滚珠座17的环槽内安放一圈，所述上滚珠19以最小间隙在滚珠压盖5的环槽内安放一圈，所述环形挡板16通过下滚珠18和上滚珠19活动联接在滚珠座17和滚珠压盖5之间，所述环形挡板16底部沿圆周方向铣削加工出一个长凹槽，又在长凹槽的长度方向中心位置沿圆周方向对称铣削加工出一个短凹槽，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，所述内齿轮4通过螺栓固定安装在环形挡板16上，所述内齿轮4与小齿轮15啮合传动安装，所述支撑座9通过螺栓固定安装在箱体1的底板上，所述限位挡块13动配合安装在支撑座9上端的滑道内，所述限位挡块13为阶梯形状，所述弹簧12安装在支撑座9上端的滑道内，所述弹簧12的下端与滑道内的环台接触、另一端与限位挡块13的阶梯面接触，所述弹簧12为压缩弹簧，所述从动架11通过螺栓固定联接在限位挡块13的下端，所述电机20通过螺栓固定联接在支撑座9上，所述凸轮10通过键固定联接在电机20的输出轴上，所述凸轮10的外轮廓与从动架11底部内表面动配合接触。In Fig. 1, Fig. 2 and Fig. 3, the two-wayhydraulic pump 14 is fixedly installed on the bottom of the box body 1 by bolts, the lower end of thedriving gear shaft 3 is fixedly connected with the input shaft of the two-wayhydraulic pump 14 through a coupling, and thedriving gear 2 Fixedly installed on thedriving gear shaft 3 through a key, the drivengear shaft 6 is installed in the bearing seat on the upper part of the box body 1 through a bearing, and the drivengear 7 is fixedly installed on the drivengear shaft 6 through a key, thedriving gear 2 and the driven gear Thedriving gear 7 is meshed with the transmission installation, and theangular displacement sensor 8 is fixedly installed on the bottom of the box body 1 through 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 of aninternal gear 4.Ball gland 5,support seat 9,cam 10, drivenframe 11, spring 12,limit block 13,pinion 15,ring baffle 16,ball seat 17,lower ball 18,upper ball 19 and motor 20, thepinion 15 is fixedly connected to thedriving gear shaft 3 through a key, theball seat 17 is fixedly installed on the bottom plate of the box body 1 by bolts through the bracket, and theball gland 5 is fixedly connected to the ball bearing by bolts. On theseat 17, thelower ball 18 is placed in the ring groove of theball seat 17 with a minimum gap, and theupper ball 19 is placed in the ring groove of theball gland 5 with a minimum gap. Thering baffle 16 is movably connected between theball seat 17 and theball gland 5 through thelower ball 18 and theupper ball 19. A long groove is milled at the bottom of theannular baffle 16 along the circumferential direction, and at the center of the length direction of the long groove The position is symmetrically milled along the circumferential direction to form a short groove, the center position of the length direction of the long groove is the same as the center position of the length direction of the short groove, and theinternal gear 4 is fixedly installed on thering baffle plate 16 by bolts, Theinternal gear 4 is engaged with thepinion 15 for transmission installation, thesupport seat 9 is fixedly installed on the bottom plate of the box body 1 by bolts, and thelimit stopper 13 is movably mounted in the slideway at the upper end of thesupport seat 9, so that Thelimit block 13 is in a stepped shape, the spring 12 is installed in the slideway at the upper end of thesupport base 9, the lower end of the spring 12 is in contact with the ring platform in the slideway, and the other end is in contact with the stepped surface of thelimit block 13 , the spring 12 is a compression spring, the drivenframe 11 is fixedly connected to the lower end of thelimit block 13 by bolts, the motor 20 is fixedly connected to thesupport seat 9 by bolts, and thecam 10 is fixedly connected by a key On the output shaft of the motor 20 , the outer contour of thecam 10 is in moving contact with the inner surface of the bottom of the drivenframe 11 .

另外，所述电机20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，环形挡板16和内齿轮4处于初始位置，此时所述环形挡板16下侧短凹槽长度方向的中心位置处于限位挡块13的轴心线上。所述限位挡块13上端为长方体形状，下端为圆柱体形状，所述弹簧12套装在限位挡块13的下端圆柱体形状部位。所述滚珠座17为圆环形状结构。所述环形挡板16为圆环形状结构。所述内齿轮4与环形挡板16同轴心线安装。In addition, the motor 20 is a steering gear motor. When the steering wheel is in the position where the vehicle can travel straight, theannular baffle 16 and theinternal gear 4 are in the initial position, and the center position of the short groove length direction on the lower side of theannular baffle 16 is at the axis of thelimit block 13. heart line. The upper end of thelimiting block 13 is in the shape of a cuboid, and the lower end is in the shape of a cylinder. The spring 12 is sleeved on the lower end of the limitingblock 13 in the shape of a cylinder. Theball seat 17 is in the shape of a ring. Theannular baffle 16 is a ring-shaped structure. Theinternal gear 4 and theannular baffle 16 are coaxially installed.

方向盘带动主动齿轮轴3上的主动齿轮2旋转，从而使与之啮合的从动齿轮7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7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14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20带动凸轮10转动，使得凸轮10的最高点作用到从动架11底部内表面上，从而使限位挡块13向下移动克服弹簧力退回到环形挡板16下部的长凹槽内，限制环形挡板16在长凹槽的范围内转动，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，就达到车辆右全转向或左全转向的位置，方向盘转动过程中使得与主动齿轮轴3固定联接的小齿轮15转过相应角度，小齿轮15与内齿轮4啮合传动带动通过螺栓固定联接的环形挡板16转动，达到900°极限位置时，限位挡块13与环形挡板16上的长凹槽的一个侧壁面接触，限制环形挡板16继续转动，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低速行驶装载作业模式时，电机20带动凸轮10转动，使得凸轮10的最低点作用到从动架11底部内表面上，若此时限位挡块13在环形挡板16下部的短凹槽范围内时，在弹簧12的作用下限位挡块13伸出，直接进入短凹槽，实现模式切换；若此时限位挡块13不在环形挡板16下部的短凹槽范围内，弹簧12使得限位挡块13压在长凹槽的顶部，当在方向盘的作用下环形挡板16下部的短凹槽到达限位挡块13所在位置时，弹簧12将限位挡块13弹入短凹槽，实现模式切换，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，使环形挡板16到达极限位置，限位挡块13与环形挡板16上的短凹槽的一个侧壁面接触，限制环形挡板16继续转动，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 3 to rotate, so that the drivengear 7 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 7 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 14 provides the driver with a sense of road through cooperation with other control elements. When the vehicle turns and needs to switch to the high-speed driving mode, the motor 20 drives thecam 10 to rotate, so that the highest point of thecam 10 acts on the inner surface of the bottom of the drivenframe 11, so that thelimit block 13 moves downward to overcome the spring force and returns to In the long groove at the bottom of thering baffle 16, the rotation of thering baffle 16 within the range of the long groove is restricted to realize mode switching. When the steering wheel is in the position where the vehicle can drive straight, the steering wheel can be rotated clockwise or counterclockwise at 90° Rotate within the range of 900 ° in one direction, when the unidirectional continuous rotation of 900 °, the vehicle will reach the position of full right steering or full left steering. Engage with theinternal gear 4 to drive thering baffle 16 fixedly connected by bolts to rotate. When reaching the 900° limit position, thelimit stopper 13 contacts with a side wall surface of the long groove on thering baffle 16 to limit the ring baffle. 16 continue to rotate, steering wheel also can not continue to rotate forward, but can turn around in the opposite direction, and this moment, the sensitivity of steering wheel is lower to guarantee the safety of high-speed transition driving process. When the vehicle turns and needs to switch to the low-speed driving and loading operation mode, the motor 20 drives thecam 10 to rotate, so that the lowest point of thecam 10 acts on the inner surface of the bottom of the drivenframe 11. When within the range of the short groove, thelimit block 13 stretches out under the action of the spring 12, and directly enters the short groove to realize mode switching; , the spring 12 makes thelimit stopper 13 press on the top of the long groove, and when the short groove at the bottom of theannular baffle 16 reaches the position of thelimit stopper 13 under the action of the steering wheel, the spring 12 pushes thelimit stopper 13 Pop into the short groove to realize mode switching. The steering wheel can be rotated within 180° clockwise or counterclockwise. When continuously rotating 180° in one direction, the vehicle can reach the right full steering or left full steering position, so that thering baffle 16 can reach the limit position, thelimit block 13 is in contact with a side wall of the short groove on theannular baffle 16, restricting the continuous rotation of theannular baffle 16, and the steering wheel cannot continue to rotate forward, but can turn in the opposite direction. At this time, the sensitivity of the steering wheel It is higher, which can reduce the work intensity of frequent turning during loading and improve work efficiency.

采用内齿轮减小了限位机构一个方向较大的尺寸，另一方向的尺寸和其它机构共同用利空间，没有增加该方向限位机构的尺寸，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。The use of internal gears reduces the larger size of the limit mechanism in one direction, and the size of the other direction shares the space with other mechanisms, without increasing the size of the limit mechanism in this direction, thereby reducing the volume of the entire steering wheel device and saving installation. space, and at the same time achieve the purpose of steering mode switching and accurate limit when the steering wheel is in any position.

Claims (7)

1. Vehicular turn steering wheel with limiting device, bidirectional hydraulic pump (14) is fixedly mounted on the bottom of casing (1), the lower end of driving gear shaft (3) is fixedly connected by the input shaft of coupler and bidirectional hydraulic pump (14), driving gear (2) is fixedly mounted on driving gear shaft (3), driven gear shaft (6) is arranged in the bearing seat on casing (1) top by bearing, driven gear (7) is fixedly mounted on driven gear shaft (6), driving gear (2) is installed with driven gear (7) engaged transmission, angular-motion transducer (8) is fixedly mounted on the bottom of casing (1), the input shaft of angular-motion transducer (8) is fixedly connected by the lower end of coupler and driven gear shaft (6), it is characterized in that, mainly by inner gear (4), ball gland (5), supporting seat (9), cam (10), from moving frame (11), spring (12), positive stop (13), miniature gears (15), ring baffle (16), ball base (17), lower ball (18), upper ball (19) and motor (20) form, described miniature gears (15) is fixedly connected on driving gear shaft (3), described ball base (17) is fixedly mounted on the base plate of casing (1) by support, described ball gland (5) is fixedly connected on ball base (17), described lower ball (18) is laid a circle in the annular groove of ball base (17) with minimum clearance, described upper ball (19) is laid a circle in the annular groove of ball gland (5) with minimum clearance, described ring baffle (16) is actively connected between ball base (17) and ball gland (5) by lower ball (18) and upper ball (19), described ring baffle (16) bottom along the circumferential direction is provided with a long recess, again in the length direction center of long recess along the circumferential direction symmetry cut out a short groove, the length direction center of the length direction center of described long recess and short groove is identical, described inner gear (4) is fixedly mounted on ring baffle (16), described inner gear (4) is installed with miniature gears (15) engaged transmission, described supporting seat (9) is fixedly mounted on the base plate of casing (1), described positive stop (13) running-fit is arranged in the slideway of supporting seat (9) upper end, described positive stop (13) is stairstepping, described spring (12) is arranged in the slideway of supporting seat (9) upper end, ring platform in the lower end of described spring (12) and slideway contacts, the other end contacts with the cascaded surface of positive stop (13), described spring (12) is Compress Spring, describedly be fixedly connected in the lower end of positive stop (13) from moving frame (11), described motor (20) is fixedly connected on supporting seat (9), described cam (10) is fixedly connected on the output shaft of motor (20), the outline of described cam (10) with move with the touch from moving frame (11) bottom interior surface.

2. Vehicular turn steering wheel with limiting device according to claim 1, it is characterized in that: described motor (20) is steering gear electric-machine.

3. Vehicular turn steering wheel with limiting device according to claim 1, it is characterized in that: when bearing circle is in the position that vehicle can the straight-line travelling state, ring baffle (16) and inner gear (4) are in initial position, and the center of the short groove length direction of described ring baffle (16) downside this moment is on the axial line of positive stop (13).

4. Vehicular turn steering wheel with limiting device according to claim 1, it is characterized in that: described positive stop (13) upper end is rectangular shape, the lower end is cylindrical shape, and described spring (12) is sleeved on the cylindrical shape position, lower end of positive stop (13).

5. Vehicular turn steering wheel with limiting device according to claim 1 is characterized in that: described ball base (17) is the toroidal structure.

6. Vehicular turn steering wheel with limiting device according to claim 1 is characterized in that: described ring baffle (16) is the toroidal structure.

7. Vehicular turn steering wheel with limiting device according to claim 1, is characterized in that: described inner gear (4) and the installation of ring baffle (16) coaxial inner conductor.

Images