A steering wheel device with a shock absorption system

Abstract

This utility model provides a steering wheel device with a shock absorption system, relating to a steering transmission mechanism, comprising: a steering wheel bracket, the steering wheel bracket including a mounting plate and a mounting arm, the mounting arm being arranged perpendicular to the mounting plate; a steering assembly disposed on the mounting plate, the steering assembly being used to drive the steering wheel bracket to rotate; a rocker arm rotatably connected to the mounting arm, the rocker arm also being rotatably connected to a shock absorber, the shock absorber being rotatably connected to the mounting plate; and a running assembly for running, including running wheels and running shafts disposed on the running wheels, the running shafts being disposed on the rocker arm. This application adopts single-sided support of the steering wheel bracket, which, compared to conventional double-sided support, allows for better arrangement of the overall structure, reduces the height of the application, achieves a compact overall design, and makes the application more miniaturized.

Description

Technical Field

[0001] This utility model relates to a steering transmission mechanism, and in particular to a steering wheel device with a shock absorption system. Background Technology

[0002] The steering wheel is an integrated mechanical structure that combines a drive motor, a steering motor, and a reducer. Currently, steering wheel mechanisms have been successfully applied in industries such as laser forklifts, assembly AGVs, and industrial robots. Robots are driven by steering wheels, so the structural durability and shock absorption of the steering wheel are crucial to the entire device. Existing robot shock absorption systems have poor obstacle-crossing capabilities and require high ground conditions in the working environment, thus limiting their use.

[0003] Currently, when installing shock absorbers, the steering wheel structure is generally arranged vertically above the tire structure, resulting in a relatively high overall vehicle height when the steering wheel structure is installed on the vehicle body, making it difficult to meet environmental requirements.

[0004] In addition, shock absorbers are usually rotatably connected to a shock absorber shaft, which is externally mounted on the steering wheel structure. When the shock absorber bears an excessive load, the shock absorber shaft is prone to deformation and breakage. Utility Model Content

[0005] This invention provides a steering wheel device with a shock absorption system, which aims to solve the problem that the existing steering wheel structure is too high and the shock absorber shaft is prone to deformation and breakage due to excessive load.

[0006] To achieve the above objectives, embodiments of this utility model provide a steering wheel device with a shock absorption system, comprising:

[0007] A steering wheel bracket, the steering wheel bracket including a mounting plate and a mounting arm, the mounting arm being arranged perpendicular to the mounting plate;

[0008] A steering assembly is mounted on the mounting plate and is used to drive the steering wheel bracket to rotate;

[0009] A rocker arm is rotatably connected to the mounting arm, and a shock absorber is also rotatably connected to the rocker arm. The shock absorber is rotatably connected to the mounting plate.

[0010] A traveling assembly for traveling includes traveling wheels and a traveling shaft disposed on the traveling wheels, the traveling shaft being disposed on the rocker arm.

[0011] Preferably, the rocker arm has U-shaped grooves at both ends, the mounting arm is rotatably connected to the groove by a pin, the shock absorber is rotatably connected to another groove by another pin, and the other end of the shock absorber is rotatably connected to the mounting plate.

[0012] Preferably, the steering assembly includes a pivot shaft, a bearing bracket, and a steering unit. The pivot shaft is vertically disposed on the mounting plate and fixedly connected to the mounting plate. The bearing bracket is disposed above the mounting plate. The steering unit is disposed on the bearing bracket. The pivot shaft passes through the bearing bracket and is drively connected to the steering unit.

[0013] Preferably, a cavity is formed inside the bearing bracket for mounting the bearing, and the rotating shaft passes through the inner ring of the bearing and is fixedly connected to the bearing.

[0014] Preferably, the steering assembly further includes a bearing cover plate, which is disposed on the bearing bracket. The cover plate has a through hole for the rotating shaft to pass through, and a retaining ring is disposed at the upper end of the rotating shaft. The retaining ring and the bearing cover plate are used to restrict the axial movement of the rotating shaft.

[0015] Preferably, the steering wheel device with a shock absorption system further includes a control assembly, which includes a control mounting base and a Hall effect sensor PCBA board and a steering control PCBA board disposed within the control mounting base.

[0016] The control mounting base is fixed on the steering unit, and the Hall sensor PCBA board is disposed above the steering control PCBA board;

[0017] The rotating shaft is also provided with a sensing part, which is used to sense the Hall sensor in the Hall sensing PCBA board.

[0018] Preferably, the steering unit is a steering motor, the output shaft of the steering motor is connected to the rotating shaft, the output shaft and the rotating shaft are hollow structures, and the side of the output shaft is provided with a wire through hole;

[0019] The sensing element is located at the upper end of the output shaft and directly below the Hall sensor.

[0020] Preferably, the steering wheel bracket and the bearing bracket are further provided with a limiting structure, which is used to limit the maximum angle of relative rotation between the steering wheel bracket and the bearing bracket.

[0021] Preferably, the mounting plate is provided with two limiting plates located on both sides of the rotating shaft, and the bottom end of the bearing bracket is provided with a limiting post. The two limiting plates are located on the rotation path of the limiting post to limit the rotation angle of the mounting plate.

[0022] Preferably, the angle between the line connecting one of the limiting plates and the rotating shaft and the line connecting the other limiting plate and the rotating shaft is 170°.

[0023] The above-mentioned solution of this utility model has the following beneficial effects:

[0024] First, this application adopts a single-sided support for the steering wheel bracket, which, compared to the conventional double-sided support, allows for a better overall structural arrangement, reduces the height of this application, achieves a compact overall design, and makes this application more miniaturized.

[0025] Second, the steering assembly in this application adopts a sealed structure, with no external leakage from bearings, shafts, etc., and does not require daily lubrication or maintenance. The structure is simple and reliable, reducing the risk of jamming.

[0026] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0027] Figure 1 This is an exploded view of this utility model;

[0028] Figure 2 This is a cross-sectional view of the present invention;

[0029] Figure 3 This is a schematic diagram showing the connection between the steering wheel bracket and the running gear assembly.

[0030] Figure 4 This is a partial schematic diagram of the control assembly;

[0031] Figure 5 This is a schematic diagram of the limiting angle.

[0032] [Explanation of Labels in the Attached Image]

[0033] 10-Steering wheel bracket, 11-Mounting plate, 12-Mounting arm, 13-Limiting plate,

[0034] 20-Steering assembly, 21-Shaft, 22-Bearing bracket, 23-Steering unit, 24-Bearing, 25-Bearing cover plate, 26-Limit post, 27-Cable hole

[0035] 30 - Rocker arm, 31 - Shock absorber

[0036] 40-Runner assembly,

[0037] 50-Control assembly, 51-Mounting base, 52-Hall sensor PCBA board, 53-Steering control PCBA board, 54-Sensing unit, 55-Control mounting cover. Detailed Implementation

[0038] To make the technical problems, technical solutions and advantages of this utility model clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0039] like Figure 1-5As shown, an embodiment of this utility model provides a steering wheel device with a shock absorption system, including a steering wheel bracket 10, a steering assembly 20, a rocker arm 30, and a traveling assembly 40. The steering wheel bracket 10 includes a mounting plate 11 and a mounting arm 12, with the mounting arm 12 perpendicular to the mounting plate 11. The mounting plate 11 and the mounting arm 12 are integrally formed. The aforementioned steering assembly 20 is mounted on the mounting plate 11 and can drive the steering wheel bracket 10 to rotate in a vertical direction. The aforementioned rocker arm 30 is rotatably mounted on the mounting arm 12, with a shock absorber 31 rotatably connected to its other end. The shock absorber 31 is also rotatably connected to the mounting plate 11. The shock absorber 31 remains in a vertical position. The aforementioned traveling assembly 40 is used for traveling and includes a traveling wheel and a traveling shaft mounted on the traveling wheel. The traveling shaft is located in the middle of the rocker arm 30. The traveling wheel can rotate using existing technology.

[0040] In this application, the steering wheel bracket 10 adopts an asymmetrical structure, and the shock absorber 31 is placed below the mounting plate 11. While ensuring good shock absorption, it saves costs and reduces the overall height, making it suitable for height requirements in special scenarios. Moreover, when encountering obstacles, the swing of the rocker arm 30 can alleviate vibration, reducing the requirements for the shock absorber 31.

[0041] Furthermore, the aforementioned rocker arm 30 has U-shaped grooves at both ends, which extend through the rocker arm 30 along its thickness. A pin is installed in each groove; one pin is rotatably connected to the lower end of the mounting arm 12, and the other pin is rotatably connected to the lower end of the shock absorber 31. Since both ends of each pin are inserted into the rocker arm 30, the load borne by each pin is evenly distributed across the rocker arm 30. Compared to the existing shock absorber 31, which bears load on only one side, the pin can withstand a larger load and is less prone to deformation or breakage. The upper end of the shock absorber 31 is rotatably mounted on the mounting plate 11 via a third pin.

[0042] Furthermore, the aforementioned steering assembly 20 includes a pivot 21, a bearing bracket 22, and a steering unit 23. The pivot 21 is vertically mounted on the mounting plate 11 and fixedly connected to the mounting plate 11. The bearing bracket 22 is located above the mounting plate 11, and the steering unit 23 is located above the bearing bracket 22. The upper end of the pivot 21 passes through the bearing bracket 22 and is drively connected to the steering unit 23.

[0043] In this embodiment, the steering unit 23 drives the rotation of the steering wheel bracket 10 by driving the rotation of the rotating shaft 21, thereby changing the direction of travel of the steering wheel device with the shock absorption system.

[0044] Furthermore, a cavity is formed within the bearing bracket 22 for mounting the bearing 24, and the rotating shaft 21 passes through and is fixedly connected to the inner ring of the bearing 24. When the rotating shaft 21 rotates, the bearing 24 can reduce the frictional resistance of rotation.

[0045] To seal the cavity and prevent dust and other contaminants from entering, a bearing cover plate 25 is installed above the bearing bracket 22 to seal the cavity. The bearing cover plate 25 is mounted on the bearing bracket 22 and the relative positions of the two are fixed by bolts. The bearing cover plate 25 is located between the bearing bracket 22 and the steering unit 23, and it has a central through hole for the rotating shaft 21 to pass through. A retaining circumferential spring is also installed at the upper end of the rotating shaft 21, located below the bearing cover plate 25. By installing the retaining circumferential spring and the bearing cover plate 25, axial movement of the rotating shaft 21 can be restricted. The retaining circumferential spring is installed according to existing technology.

[0046] The steering wheel assembly with a shock absorption system also includes a control assembly 50. The control assembly 50 includes a control mounting base 51, a Hall effect sensor PCBA board 52, and a steering control PCBA board 53. Both the Hall effect sensor PCBA board 52 and the steering control PCBA board 53 are housed within the control mounting base 51, with the Hall effect sensor PCBA board 52 positioned above the steering control PCBA board 53. The Hall effect sensor PCBA board 52 has a Hall effect sensor, and a sensing element 54 is provided on the rotating shaft 21. The Hall effect sensor determines the position of the sensing element 54 to influence the rotation angle of the rotating shaft 21. The sensing element 54 is a magnet. Preferably, a control mounting cover 55 is provided above the control mounting base 51.

[0047] The aforementioned steering unit 23 is a steering motor. The output shaft of the steering motor is connected to the rotating shaft 21. The output shaft and the rotating shaft 21 are coaxial. Both the output shaft and the rotating shaft 21 are hollow structures. The hollow structure is used for wiring. The upper side of the output shaft is provided with a wire hole 27, which is connected to the hollow structure.

[0048] In this embodiment, to ensure that the hollow structure of the output shaft and the rotating shaft 21 are connected, the output shaft and the rotating shaft 21 are the same component. That is, the steering unit does not have an output shaft, but is fixedly connected to the rotor of the steering unit through the rotating shaft 21. This ensures both the connection of the hollow structure and the rotation of the steering wheel bracket 10 under the drive of the steering motor.

[0049] In another embodiment, the steering wheel bracket 10 can be connected by extending the output shaft instead of using the rotating shaft 21. Both methods can achieve the steering motor driving the steering wheel bracket 10 to rotate while ensuring the unobstructed flow of the hollow structure.

[0050] The aforementioned sensing element 54 is disposed above the rotating shaft 21. In the aforementioned embodiments of two output shafts and rotating shaft 21, when no output shaft is provided, the sensing element 54 is disposed at the top of the rotating shaft 21. When no rotating shaft 21 is provided, the sensing element 54 is disposed at the upper end of the output shaft.

[0051] Preferably, in order to prevent the rotation angle between the steering wheel bracket 10 and the bearing bracket 22 from being too large, a limiting structure is also provided between the two, which can limit the maximum rotation angle between the two.

[0052] In this application, the upper surface of the mounting plate 11 is provided with two limiting plates 13, which are located on both sides of the rotating shaft 21. The bottom end of the bearing bracket 22 is provided with a limiting post 26, and the two limiting plates 13 are located on the rotation path of the limiting post 26. When the limiting post 26 rotates to one of the limiting plates 13, the steering wheel bracket 10 cannot continue to rotate because the limiting post 26 and the limiting plate 13 abut against each other, thereby achieving the function of limiting.

[0053] Preferably, the angle between the line connecting one limiting plate 13 and the rotating shaft 21 and the connection between the other limiting plate 13 and the rotating shaft 21 is 170°. Preferably, the unidirectional rotatable angle of the limiting post is 85°.

[0054] In this application, the steering assembly 20 is disposed between the bearing bracket 22 and the bearing cover plate 25, without being exposed, requiring no subsequent maintenance, and can adapt to dusty and complex environments, thus having better adaptability. Moreover, the steering unit 23 is connected to the steering wheel bracket 10, eliminating the need for gear sets and reducers to drive the steering wheel bracket 10, resulting in better transmission efficiency and a simpler structure.

[0055] When using this application, when encountering uneven road surfaces, the control mounting base 51 is fixed to the bottom of the vehicle body. Since the bearing 24 cannot move longitudinally, the height between the control mounting base and the bearing bracket 22 will not change. The running assembly 40 can only rotate to achieve the purpose of running. The shock absorber 31 is compressed and returned to its original position by its own spring to achieve the purpose of shock absorption and protect the components on the vehicle body.

[0056] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A steering wheel assembly having a shock absorption system, characterized by include: A steering wheel bracket (10) includes a mounting plate (11) and a mounting arm (12), wherein the mounting arm (12) is arranged perpendicular to the mounting plate (11); A steering assembly (20) is mounted on the mounting plate (11) and is used to drive the steering wheel bracket (10) to rotate. A rocker arm (30) is rotatably connected to the mounting arm (12). The rocker arm (30) is also rotatably connected to a shock absorber (31), which is rotatably connected to the mounting plate (11). The traveling assembly (40) is used for traveling and includes a traveling wheel and a traveling shaft disposed on the traveling wheel, the traveling shaft being disposed on the rocker arm (30).

2. The steering wheel assembly with a shock absorption system according to claim 1, characterized in that: The rocker arm (30) has U-shaped grooves at both ends. The mounting arm (12) is rotatably connected to the groove by a pin. The shock absorber (31) is rotatably connected to another groove by another pin. The other end of the shock absorber (31) is rotatably connected to the mounting plate (11).

3. The steering wheel assembly with a shock absorption system according to claim 1, characterized in that: The steering assembly (20) includes a pivot (21), a bearing bracket (22), and a steering unit (23). The pivot (21) is vertically mounted on the mounting plate (11) and fixedly connected to the mounting plate (11). The bearing bracket (22) is located above the mounting plate (11). The steering unit (23) is mounted on the bearing bracket (22). The pivot (21) passes through the bearing bracket (22) and is connected to the steering unit (23) in a transmission manner.

4. The steering wheel assembly with a shock absorption system according to claim 3, characterized in that: The bearing bracket (22) has a cavity for installing the bearing (24), and the rotating shaft (21) passes through the inner ring of the bearing (24) and is fixedly connected to the bearing (24).

5. The steering wheel device with a shock absorption system according to claim 3, characterized in that: The steering assembly (20) also includes a bearing cover plate (25), which is disposed on the bearing bracket (22). The cover plate is provided with a through hole for the rotating shaft (21) to pass through. The upper end of the rotating shaft (21) is also provided with a retaining ring. The retaining ring and the bearing cover plate (25) are used to restrict the axial movement of the rotating shaft (21).

6. The steering wheel device with a shock absorption system according to claim 3, characterized in that: The steering wheel device with a shock absorption system also includes a control assembly (50), which includes a control mounting base (51) and a Hall sensor PCBA board (52) and a steering control PCBA board (53) disposed in the control mounting base (51). The control mounting base (51) is fixed on the steering unit (23), and the Hall sensor PCBA board (52) is disposed above the steering control PCBA board (53); The rotating shaft (21) is also provided with a sensing part (54), which is used to sense the Hall sensor in the Hall sensing PCBA board (52).

7. The steering wheel device with a shock absorption system according to claim 6, characterized in that: The steering unit (23) is a steering motor. The output shaft of the steering motor is connected to the rotating shaft (21) in a transmission manner. The output shaft and the rotating shaft (21) are hollow structures respectively. A wire hole (27) is provided on the side of the output shaft. The sensing unit (54) is disposed at the upper end of the output shaft and is located directly below the Hall sensor.

8. The steering wheel device with a shock absorption system according to claim 3, characterized in that: The steering wheel bracket (10) and the bearing bracket (22) are also provided with a limiting structure, which is used to limit the maximum angle of relative rotation between the steering wheel bracket (10) and the bearing bracket (22).

9. The steering wheel device with a shock absorption system according to claim 8, characterized in that: The mounting plate (11) is provided with two limiting plates (13), which are located on both sides of the rotating shaft (21). The bearing bracket (22) is provided with a limiting post (26) at the bottom end. The two limiting plates (13) are located on the rotation path of the limiting post (26) to limit the rotation angle of the mounting plate (11).

10. The steering wheel device with a shock absorption system according to claim 9, characterized in that: The angle between the line connecting one of the limiting plates (13) and the rotating shaft (21) and the line connecting the other limiting plate (13) and the rotating shaft (21) is 170°.

Images