Drive-by-wire chassis steering mechanism

Abstract

The utility model discloses a drive-by-wire chassis steering mechanism, and relates to the field of drive-by-wire chassis. The device comprises a motor, a bracket, a transmission structure arranged on the motor and a moving structure arranged on the bracket, the transmission structure comprises a fixing frame fixedly connected to the lower surface of the motor, a rack slidably connected to the lower surface of the fixing frame, a gear fixedly connected to the output end of the motor, a first fixing shaft fixedly connected to the lower surface of the rack, a connecting rod rotationally connected to the outer surface of the first fixing shaft and a first buffering assembly arranged on the fixing frame. Through the arrangement of the second buffer assembly, the moving wheel has an independent buffer structure, so that the energy transmitted to the bracket by the vibration of the moving wheel can be reduced, the vibration of the bracket is reduced, the comfort of the vehicle is further improved, and the wear rate of the frame and other parts can be reduced by reducing the vibration of the frame, so that the service life of the vehicle is prolonged. Therefore, the service time of the frame and the connecting part is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of drive-by-wire chassis, and in particular relates to a drive-by-wire chassis steering mechanism. Background Technology

[0002] steer-by-wire is a new type of automotive steering system that converts the driver's steering input into electrical signals via sensors. These signals are then transmitted to the electronic control unit (ECU), which in turn sends instructions to the steering actuator motor. The motor drives the steering mechanism, thereby turning the wheels. This steering method avoids a direct mechanical connection between the steering wheel and the steering wheels, making it easier to optimize the interior space layout.

[0003] In existing technologies, most drive-by-wire chassis steering mechanisms use devices such as buffer springs to cushion and dampen the chassis. However, this results in the other wheel vibrating when one wheel vibrates, causing the other wheel to vibrate as well. This accelerates the wear between the wheel and the wheel frame, reduces the service life of the wheel and the wheel frame, and increases the vibration frequency of the chassis each time the wheel vibrates, thus reducing the comfort of the vehicle. To address these issues, we provide a drive-by-wire chassis steering mechanism. Utility Model Content

[0004] The purpose of this invention is to provide a drive-by-wire chassis steering mechanism to solve the corresponding problem.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution: by setting the second buffer component, the moving wheel has an independent buffer structure, which can reduce the energy transmitted from the vibration of the moving wheel to the bracket, thereby reducing the vibration of the bracket and improving the comfort of the vehicle.

[0006] This utility model is a drive-by-wire chassis steering mechanism, which includes: a motor, a bracket, a transmission structure mounted on the motor, and a moving structure mounted on the bracket.

[0007] The transmission structure includes a fixed frame fixedly connected to the lower surface of the motor, a rack slidably connected to the lower surface of the fixed frame, a gear fixedly connected to the output end of the motor, a first fixed shaft fixedly connected to the lower surface of the rack, a connecting rod rotatably connected to the outer surface of the first fixed shaft, and a first buffer assembly disposed on the fixed frame. The moving structure includes a rotating shaft slidably connected to both sides of the bracket, a wheel frame fixedly connected to the lower surface of the rotating shaft, a moving wheel rotatably connected to the inner side of the wheel frame, a second buffer assembly disposed on the wheel frame, and a connecting assembly disposed on the upper surface of the rotating shaft.

[0008] Preferably, the first buffer assembly includes a first buffer spring fixedly connected to the lower surface of the fixed frame, a first guide post fixedly connected to the lower surface of the fixed frame, and a first guide rod fixedly connected to the upper surface of the bracket, which facilitates the buffering and elimination of vibrations transmitted from the bracket to the fixed frame, reduces the vibration generated by the fixed frame, and improves the comfort of the vehicle.

[0009] Preferably, the inner surface of the first guide post is slidably connected to the first guide rod, the end of the first buffer spring away from the fixed frame is fixedly connected to the bracket, and hydraulic oil is provided inside the first guide post to improve the buffering capacity.

[0010] Preferably, the second buffer assembly includes a second guide rod fixed to the lower surface of the bracket, a second guide post fixedly connected to the upper surface of the wheel frame, and a second buffer spring fixedly connected to the lower inner wall of the second guide post, which facilitates the buffering and elimination of vibrations transmitted from the wheel frame to the bracket, reduces the vibration generated by the bracket, and thus reduces the wear between the bracket and the connecting parts.

[0011] Preferably, the end of the second buffer spring away from the second guide post is fixedly connected to the second guide rod, the outer surface of the second guide rod is slidably connected to the second guide post, and hydraulic oil is provided inside the second guide post to improve the buffering capacity.

[0012] Preferably, the connecting assembly includes an adjusting seat fixedly connected to the upper surface of the rotating shaft, a second fixed shaft fixedly connected to the upper surface of the adjusting seat, and a fixing ring fixedly connected to the upper surface of the second fixed shaft. Two symmetrically distributed protective springs are fixedly connected to the end of the connecting rod away from the first fixed shaft, which facilitates the connection between the connecting rod and the adjusting seat. The movement of the connecting rod drives the adjusting seat to rotate, which in turn drives the wheel frame to rotate, realizing the steering of the moving wheel. At the same time, the protective springs protect the connecting rod, preventing the wheel frame from vibrating and causing the adjusting seat to move, which could damage the connecting rod.

[0013] Preferably, one of the protective springs is fixedly connected to the fixed ring at the end away from the connecting rod, and the other protective spring is fixedly connected to the adjusting seat at the end away from the connecting rod. The outer surface of the second fixed shaft is slidably connected to the connecting rod, which facilitates the protection of the connecting rod and prevents the wheel frame from vibrating and causing the adjusting seat to move, thus avoiding damage to the connecting rod.

[0014] Preferably, the outer surface of the gear meshes with the rack, and the motor is electrically connected to an external power source.

[0015] This utility model has the following beneficial effects:

[0016] 1. By setting the second buffer component, this utility model enables the moving wheel to have an independent buffer structure, which can reduce the energy transmitted from the vibration of the moving wheel to the bracket, thereby reducing the vibration of the bracket and improving the comfort of the vehicle.

[0017] 2. This utility model reduces the vibration of the frame, thereby reducing the wear rate of the frame and other components, thus extending the service life of the frame and connecting parts and reducing maintenance costs.

[0018] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 A three-dimensional structural diagram of a drive-by-wire chassis steering mechanism;

[0021] Figure 2 This is a schematic diagram of a part of a drive-by-wire chassis steering mechanism;

[0022] Figure 3 This is a schematic diagram of a part of a drive-by-wire chassis steering mechanism;

[0023] Figure 4 This is a schematic diagram of a part of a drive-by-wire chassis steering mechanism.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Motor; 2. Bracket; 3. Fixing frame; 4. Rack; 5. Gear; 6. First fixed shaft; 7. Connecting rod; 8. Rotating shaft; 9. Wheel frame; 10. First buffer spring; 11. First guide post; 12. First guide rod; 13. Second guide rod; 14. Second guide post; 15. Second buffer spring; 16. Adjusting seat; 17. Second fixed shaft; 18. Fixing ring; 19. Protective spring; 20. Moving wheel. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model. Specific Implementation

[0027] like Figures 1-4 As shown, this utility model is a drive-by-wire chassis steering mechanism, including: a motor 1, a bracket 2, a transmission structure mounted on the motor 1, and a moving structure mounted on the bracket 2. The motor 1 is electrically connected to an external power source.

[0028] The transmission structure includes a fixed frame 3 fixedly connected to the lower surface of the motor 1, a rack 4 slidably connected to the lower surface of the fixed frame 3, a gear 5 fixedly connected to the output end of the motor 1, a first fixed shaft 6 fixedly connected to the lower surface of the rack 4, a connecting rod 7 rotatably connected to the outer surface of the first fixed shaft 6, and a first buffer assembly disposed on the fixed frame 3. The outer surface of the gear 5 meshes with the rack 4. The first buffer assembly includes a first buffer spring 10 fixedly connected to the lower surface of the fixed frame 3, a first guide post 11 fixedly connected to the lower surface of the fixed frame 3, and a first guide rod 12 fixedly connected to the upper surface of the bracket 2. The inner surface of the first guide post 11 is slidably connected to the first guide rod 12. The end of the first buffer spring 10 away from the fixed frame 3 is fixedly connected to the bracket 2. The moving structure includes a sliding connection. The bracket 2 has a rotating shaft 8 on both sides, a wheel frame 9 fixedly connected to the lower surface of the rotating shaft 8, a movable wheel 20 rotatably connected to the inner side of the wheel frame 9, a second buffer assembly set on the wheel frame 9, and a connecting assembly set on the upper surface of the rotating shaft 8. The connecting assembly includes an adjusting seat 16 fixedly connected to the upper surface of the rotating shaft 8, a second fixed shaft 17 fixedly connected to the upper surface of the adjusting seat 16, and a fixing ring 18 fixedly connected to the upper surface of the second fixed shaft 17. Two symmetrically distributed protective springs 19 are fixedly connected to the end of the connecting rod 7 away from the first fixed shaft 6. One protective spring 19 is fixedly connected to the fixing ring 18 at the end away from the connecting rod 7, and the other protective spring 19 is fixedly connected to the adjusting seat 16 at the end away from the connecting rod 7. The outer surface of the second fixed shaft 17 is slidably connected to the connecting rod 7.

[0029] In this embodiment, the motor 1 drives the gear 5 to rotate. The gear 5 meshes with the rack 4, causing the rack 4 to move. The movement of the rack 4, through the connection between the first fixed shaft 6 and the connecting rod 7, causes the connecting rod 7 to move. This, in turn, through the connection between the connecting rod 7 and the second fixed shaft 17, causes the adjusting seat 16 to rotate. The rotation of the adjusting seat 16, through the rotating shaft 8, causes the wheel frame 9 to rotate, thus realizing the rotation of the moving wheel 20. When the bracket 2 vibrates, the vibration transmitted to the fixed frame 3 is reduced by the buffering of the first buffer spring 10. At the same time, the connection between the first guide post 11 and the first guide rod 12 guides the movement of the bracket 2, improving the stability of the bracket 2. Furthermore, the hydraulic oil inside the first guide post 11 can improve the buffering effect. Specific Implementation

[0030] like Figures 1-4 As shown, this utility model is a drive-by-wire chassis steering mechanism. Compared with Embodiment 1, this embodiment includes: a motor 1, a bracket 2, a transmission structure mounted on the motor 1, and a moving structure mounted on the bracket 2.

[0031] The transmission structure includes a fixed frame 3 fixedly connected to the lower surface of the motor 1, a rack 4 slidably connected to the lower surface of the fixed frame 3, a gear 5 fixedly connected to the output end of the motor 1, a first fixed shaft 6 fixedly connected to the lower surface of the rack 4, a connecting rod 7 rotatably connected to the outer surface of the first fixed shaft 6, and a first buffer assembly disposed on the fixed frame 3. The outer surface of the gear 5 meshes with the rack 4. The moving structure includes a rotating shaft 8 slidably connected to both sides of the support 2, a wheel frame 9 fixedly connected to the lower surface of the rotating shaft 8, a movable wheel 20 rotatably connected to the inner side of the wheel frame 9, a second buffer assembly disposed on the wheel frame 9, and a connecting assembly disposed on the upper surface of the rotating shaft 8. The second buffer assembly includes a second guide rod 13 fixedly connected to the lower surface of the support 2, a second guide post 14 fixedly connected to the upper surface of the wheel frame 9, and a fixed connecting rod 7. A second buffer spring 15 is attached to the inner wall of the second guide post 14. The end of the second buffer spring 15 away from the second guide post 14 is fixedly connected to the second guide rod 13. The outer surface of the second guide rod 13 is slidably connected to the second guide post 14. The connecting assembly includes an adjusting seat 16 fixedly connected to the upper surface of the rotating shaft 8, a second fixed shaft 17 fixedly connected to the upper surface of the adjusting seat 16, and a fixing ring 18 fixedly connected to the upper surface of the second fixed shaft 17. Two symmetrically distributed protective springs 19 are fixedly connected to the end of the connecting rod 7 away from the first fixed shaft 6. One protective spring 19 is fixedly connected to the fixing ring 18 at the end away from the connecting rod 7, and the other protective spring 19 is fixedly connected to the adjusting seat 16 at the end away from the connecting rod 7. The outer surface of the second fixed shaft 17 is slidably connected to the connecting rod 7.

[0032] In this embodiment, when the moving wheel 20 vibrates, the vibration is transmitted to the bracket 2 via the wheel frame 9, the second guide rod 13, the second guide post 14, and the second buffer spring 15. The hydraulic oil inside the second guide post 14 and the second buffer spring 15 work together to improve the vibration buffering effect of the second guide rod 13 and the second guide post 14, thereby reducing the vibration generated by the bracket 2. At the same time, the vibration of the wheel frame 9 will drive the rotating shaft 8 to move, thereby causing the adjusting seat 16 and the second fixed shaft 17 to vibrate. The protective spring 19 is provided to protect the connecting rod 7 when the adjusting seat 16 and the second fixed shaft 17 vibrate, avoiding damage caused by the connecting rod 7 colliding with the adjusting seat 16 and the second fixed shaft 17.

[0033] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0034] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A by-wire chassis steering mechanism, characterized in that, Motor (1), support (2), transmission structure arranged on the motor (1) and moving structure arranged on the support (2) are included. The transmission structure includes a fixed frame (3) fixedly connected to the lower surface of the motor (1), a rack (4) slidingly connected to the lower surface of the fixed frame (3), a gear (5) fixedly connected to the output end of the motor (1), a first fixed shaft (6) fixedly connected to the lower surface of the rack (4), a connecting rod (7) rotatably connected to the outer surface of the first fixed shaft (6), and a first buffer assembly arranged on the fixed frame (3), and the moving structure includes a rotating shaft (8) slidingly connected to both sides of the support (2), a wheel frame (9) fixedly connected to the lower surface of the rotating shaft (8), a moving wheel (20) rotatably connected to the inner side of the wheel frame (9), a second buffer assembly arranged on the wheel frame (9), and a connecting assembly arranged on the upper surface of the rotating shaft (8).

2. A by-wire chassis steering mechanism according to claim 1, characterised in that, The first buffer assembly includes a first buffer spring (10) fixedly connected to the lower surface of the fixed frame (3), a first guide column (11) fixedly connected to the lower surface of the fixed frame (3), and a first guide rod (12) fixedly connected to the upper surface of the support (2).

3. A by-wire chassis steering mechanism according to claim 2, characterised in that, The inner surface of the first guide column (11) is slidingly connected with the first guide rod (12), and one end of the first buffer spring (10) away from the fixed frame (3) is fixedly connected with the support (2).

4. A by-wire chassis steering mechanism according to claim 1, characterised in that, The second buffer assembly includes a second guide rod (13) fixed to the lower surface of the support (2), a second guide column (14) fixedly connected to the upper surface of the wheel frame (9), and a second buffer spring (15) fixedly connected to the lower inner wall of the second guide column (14).

5. A by-wire chassis steering mechanism according to claim 4, wherein, One end of the second buffer spring (15) away from the second guide column (14) is fixedly connected with the second guide rod (13), and the outer surface of the second guide rod (13) is slidingly connected with the second guide column (14).

6. A by-wire chassis steering mechanism according to claim 1, wherein, The connecting assembly includes an adjusting seat (16) fixedly connected to the upper surface of the rotating shaft (8), a second fixed shaft (17) fixedly connected to the upper surface of the adjusting seat (16), and a fixed ring (18) fixedly connected to the upper surface of the second fixed shaft (17), and one end of the connecting rod (7) away from the first fixed shaft (6) is fixedly connected with two symmetrically distributed protection springs (19).

7. A by-wire chassis steering mechanism according to claim 6, wherein, One end of one of the protection springs (19) away from the connecting rod (7) is fixedly connected with the fixed ring (18), and one end of the other protection spring (19) away from the connecting rod (7) is fixedly connected with the adjusting seat (16), and the outer surface of the second fixed shaft (17) is slidingly connected with the connecting rod (7).

8. A by-wire chassis steering mechanism according to claim 1, wherein, The outer surface of the gear (5) is meshingly connected with the rack (4), and the motor (1) is electrically connected with an external power supply.

Images