Rear wheel automatic aligning device
By designing an automatic rear wheel return device, which utilizes sensors and an electrical control system to achieve automatic rear wheel return, the problem of cumbersome operation and safety issues caused by rear wheel deflection in existing technologies is solved, thereby improving the driving safety of construction machinery.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-28
- Publication Date
- 2026-03-31
AI Technical Summary
In existing construction machinery, the operation of switching from rear wheel steering to front wheel steering is cumbersome and prone to deflection due to hydraulic leakage, which affects driving safety, especially on rough roads or trestle bridges.
Design a rear wheel automatic return-to-center device. The device detects rear wheel deflection using sensors and utilizes the mechanical structure and electrical control system of the tie rod sensor and steering cylinder to achieve automatic return-to-center of the rear wheels, ensuring that the rear wheels remain in a straight position during driving.
It simplifies the operation, improves driving safety, ensures that the rear wheels always remain straight, and reduces the safety risks caused by deflection.
Smart Images
Figure CN224061047U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to engineering machinery technical field especially is related to a rear wheel automatic return device. BACKGROUND
[0002] In engineering machinery, using front and rear double steering axle can make the equipment realize various steering modes, such as front wheel steering, four-wheel steering, crab walking, etc., in actual application, when it is needed to switch to front wheel steering, it is usually needed to manually hit the steering wheel to adjust four-wheel return and then lock the rear axle steering through a hydraulic valve block, this kind of mode is complicated to operate, and due to factors such as hydraulic line leakage, the rear wheel will be deflected under external force during driving, which affects driving safety, and the rear wheel deflection will be more serious when driving on rough road or through a stack bridge. SUMMARY
[0003] The technical problem to be solved by the utility model is to overcome the defects of the prior art, provide a rear wheel automatic return device, which has simple mechanical structure and control logic, can ensure that the rear wheel is always in a return state during driving, reduces the difficulty of operation, improves the safety of driving, and effectively solves the problems in the background art.
[0004] In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme:
[0005] A rear wheel automatic return device, comprising a steering drive axle, a tire is installed on the axle shaft of the steering drive axle, a sensor fixing plate is installed on the side of the steering drive axle through a sensor fixing bolt, a pull rod sensor is installed on the sensor fixing plate, a steering oil cylinder is installed on the side of the steering drive axle, a movable clamp is installed on the pull rod sensor, the movable clamp is movably connected with the steering oil cylinder, a pull rod connecting seat is installed on the end of the cylinder rod of the steering oil cylinder, and the pull rod connecting seat is fixedly connected with the sensor pull rod on the pull rod sensor.
[0006] Further, the pull rod sensor and the steering oil cylinder are arranged in parallel.
[0007] Further, the pull rod connecting seat comprises a U-shaped connecting plate, a clamping bolt and a U-shaped clamp, the U-shaped connecting plate and the U-shaped clamp are buckled on the end of the cylinder rod of the steering oil cylinder, the U-shaped connecting plate and the U-shaped clamp are connected and fixed through the clamping bolt, and the sensor pull rod on the pull rod sensor is fixedly connected with the U-shaped connecting plate.
[0008] Further, the pull rod connecting seat further comprises a rubber pad, and the rubber pad is arranged on the contact surface of the U-shaped connecting plate, the U-shaped clamp and the cylinder rod of the steering oil cylinder.
[0009] Compared with the prior art, the automatic rear wheel alignment device has the following advantages: the mechanical structure and control logic are simple, the vehicle can always keep the rear wheel in the alignment state during driving, the difficulty of operation is reduced, and the safety of driving is improved. BRIEF DESCRIPTION OF DRAWINGS
[0010] Fig. 1 is a schematic view of the three-dimensional structure of the utility model;
[0011] Fig. 2 is a schematic view of the partial structure of the pull rod connecting seat of the utility model.
[0012] In the figure: 1 - steering drive axle, 1.1 - steering oil cylinder, 1.1.1 - steering oil cylinder rod, 2 - tire, 3 - pull rod sensor, 3.1 - sensor pull rod, 3.2 - movable clamp, 4 - sensor fixing plate, 5 - sensor fixing bolt, 6 - pull rod connecting seat, 7 - U-shaped connecting plate, 8 - clamping bolt, 9 - U-shaped clamp, 10 - rubber pad. DETAILED DESCRIPTION
[0013] The utility model can be explained in detail through the following examples, and the purpose of the utility model is to protect all technical improvements within the scope of the utility model.
[0014] Please refer to Figs. 1-2The embodiment provides a technical scheme: a rear wheel automatic alignment device, which comprises a steering drive axle 1, a tire 2 is installed on an axle of the steering drive axle 1, a sensor fixing plate 4 is installed on the side of the steering drive axle 1 through a sensor fixing bolt 5, a pull rod sensor 3 is installed on the sensor fixing plate 4, a steering oil cylinder 1.1 is installed on the side of the steering drive axle 1, a movable clamp 3.2 is installed on the pull rod sensor 3, the movable clamp 3.2 is movably connected with the steering oil cylinder 1.1, a pull rod connecting seat 6 is installed at the end of a steering oil cylinder rod 1.1.1 of the steering oil cylinder 1.1, the pull rod connecting seat 6 is fixedly connected with a sensor pull rod 3.1 on the pull rod sensor 3, the pull rod sensor 3 and the steering oil cylinder 1.1 are arranged in parallel, the pull rod connecting seat 6 comprises a U-shaped connecting plate 7, a clamping bolt 8 and a U-shaped clamp 9, the U-shaped connecting plate 7 and the U-shaped clamp 9 are buckled at the end of the steering oil cylinder rod 1.1.1, the U-shaped connecting plate 7 and the U-shaped clamp 9 are connected and fixed through the clamping bolt 8, the sensor pull rod 3.1 on the pull rod sensor 3 is fixedly connected with the U-shaped connecting plate 7, during driving of the equipment, the rear wheel is deflected by external force and the like to drive the axle steering oil cylinder rod 1.1.1 to stretch and contract, the sensor pull rod 3.1 moves synchronously with the steering oil cylinder rod 1.1.1, the pull rod sensor 3 outputs an electric signal to a controller, an electrical control system judges the stretching and contracting of the steering oil cylinder rod 1.1.1, outputs a control signal to a hydraulic actuator, the hydraulic actuator controls the steering oil cylinder 1.1 to move in the opposite direction, after the tire 2 is aligned, the control system outputs a control signal to the hydraulic actuator steering oil cylinder 1.1 to stop moving, and closed loop control is achieved, the mechanical structure and control logic are simple, the vehicle can always keep the rear wheel in an aligned state during driving, the difficulty of operation is reduced, and the safety of driving is improved.
[0015] The pull rod connecting seat 6 further comprises a rubber pad 10, the rubber pad 10 is arranged on the contact surface of the U-shaped connecting plate 7, the U-shaped clamp 9 and the steering oil cylinder rod 1.1.1, the rubber pad 10 can protect the surface of the steering oil cylinder rod 1.1.1 and increase the friction force, so that the connection is more reliable.
[0016] The working principle of the rear wheel automatic alignment device is as follows: during driving of the equipment, the rear wheel is deflected by external force and the like to drive the axle steering oil cylinder rod 1.1.1 to stretch and contract, the sensor pull rod 3.1 moves synchronously with the steering oil cylinder rod 1.1.1, the pull rod sensor 3 outputs an electric signal to a controller, an electrical control system judges the stretching and contracting of the steering oil cylinder rod 1.1.1, outputs a control signal to a hydraulic actuator, the hydraulic actuator controls the steering oil cylinder 1.1 to move in the opposite direction, after the tire 2 is aligned, the control system outputs a control signal to the hydraulic actuator steering oil cylinder 1.1 to stop moving, and closed loop control is achieved.
[0017] It is worth noting that the components disclosed in the above embodiments are all general standard components or components known to those skilled in the art, the structure and principle of which can be known by the technical personnel through the technical manual or through the conventional experimental method.
[0018] In the utility model, unless another definite provision and limitation, the term "mount", "link", "connect", "fix" and so on term should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can pass through the indirect connection of intermediate medium, can be the communication or the interaction of two elements of two elements inside, unless another definite limitation. For the ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances, for example, rotating connection can be rotating connection through bearing.
[0019] The part not described in the utility model is prior art, although the utility model is specifically shown and introduced in combination with the preferred embodiment, there are many specific implementation methods and approaches for the technical scheme, and the above-mentioned is only the preferred embodiment of the utility model, but the skilled in the art should understand that various changes can be made to the utility model in form and detail without departing from the spirit and scope of the utility model defined by the appended claims, and all are within the protection scope of the utility model.
Claims
1. A rear wheel automatic straightening device, comprising a steering drive axle (1), a tire (2) is installed on the wheel shaft of the steering drive axle (1), characterized in that: The side of the steering drive axle (1) is provided with a sensor fixing plate (4) through a sensor fixing bolt (5), a pull rod sensor (3) is installed on the sensor fixing plate (4), a steering oil cylinder (1.1) is installed on the side of the steering drive axle (1), a movable clamp (3.2) is installed on the pull rod sensor (3), the movable clamp (3.2) is movably connected with the steering oil cylinder (1.1), a pull rod connecting seat (6) is installed at the end of a steering oil cylinder rod (1.1.1) of the steering oil cylinder (1.1), and the pull rod connecting seat (6) is fixedly connected with a sensor pull rod (3.1) on the pull rod sensor (3).
2. The rear wheel automatic straightening device according to claim 1, characterized in that: The pull rod sensor (3) and the steering oil cylinder (1.1) are arranged in parallel.
3. The rear wheel automatic straightening device according to claim 1, characterized in that: The pull rod connecting seat (6) comprises a U-shaped connecting plate (7), a clamping bolt (8) and a U-shaped clamp (9), the U-shaped connecting plate (7) and the U-shaped clamp (9) are buckled at the end of the steering oil cylinder rod (1.1.1), the U-shaped connecting plate (7) and the U-shaped clamp (9) are connected and fixed through the clamping bolt (8), and the sensor pull rod (3.1) on the pull rod sensor (3) is fixedly connected with the U-shaped connecting plate (7). The pull rod connecting seat (6) further comprises a rubber pad (10), and the rubber pad (10) is arranged on the contact surface of the U-shaped connecting plate (7), the U-shaped clamp (9) and the steering oil cylinder rod (1.1.1).
4. The rear wheel automatic straightening device according to claim 1, characterized in that: