Automobile steering force detection device

Abstract

The invention discloses an automobile steering force detection device, which comprises a dynamometer, a fixed ring, a movable ring and an operation ring, and is characterized in that the fixed ring is fixedly connected with a steering wheel of an automobile, the movable ring is slidably connected with the fixed ring, the dynamometer is connected with the movable ring and the fixed ring, the dynamometer is used for detecting the torque of the movable ring, and the operation ring is connected with the dynamometer. The operation ring is connected with the movable ring in a sliding mode, and the buffer is connected with the operation ring and the movable ring. According to the automobile steering force detection device, the influence of relative displacement between an arm and a steering wheel on a result is reduced, and the detection accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile detection, in particular to an automobile braking and steering force detection device. Background Art

[0002] The steering force detection of the car is an important part of car maintenance and detection, which involves the evaluation and verification of the performance of the vehicle steering system. Steering force detection is not only related to driving comfort and convenience, but also directly related to the safety and stability of vehicle driving. When detecting the steering force of the car, the force of the driver when steering is directly obtained by the dynamometer installed on the steering wheel, so as to measure the tangential force applied to the steering wheel. However, in the dynamic detection of the car, since the steering force signal is collected while the car is driving, the vibration generated by the car during the rotation detection process will cause the relative displacement of the driver's arm and the steering wheel, and these displacements will eventually be converted into interference signals, thereby affecting the detection results. Summary of the invention

[0003] In view of the above-mentioned prior art, the present invention provides a vehicle steering force detection device to reduce the influence of the relative displacement between the arm and the steering wheel on the result and improve the accuracy of the detection.

[0004] To achieve the above object, the technical solution of the embodiment of the present invention is implemented as follows:

[0005] A vehicle steering force detection device comprises a dynamometer, a fixed ring, a movable ring and an operating ring, wherein the fixed ring is fixedly connected to the steering wheel of the vehicle, the movable ring is slidably connected to the fixed ring, the dynamometer connects the movable ring and the fixed ring, the dynamometer is used to detect the torque of the movable ring, the operating ring is slidably connected to the movable ring, and the buffer is connected to the operating ring and the movable ring.

[0006] Furthermore, the fixing ring is provided with a clamping claw, and the clamping claw is used to clamp with the steering wheel.

[0007] Furthermore, the force sensor includes a force sensor, a first connecting plate and a second connecting plate, the first connecting plate is connected to the fixed ring, the second connecting plate is connected to the movable ring, and the force sensor is connected to the first connecting plate and the second connecting plate.

[0008] Furthermore, the buffer includes a return spring and a limit head, the limit head is fixedly connected to the movable ring, the operating ring is provided with a groove for inserting the limit head, the return spring is arranged in the groove, and the return spring is connected to the limit head.

[0009] Furthermore, the return spring is a coil spring, one end of which is fixedly connected to the operating ring, and the other end of which is sleeved with the limit head.

[0010] Furthermore, the buffer includes a sleeve, a piston rod and a limit head, the limit head is fixedly connected to the movable ring, the operating ring is provided with a groove for inserting the limit head, the sleeve is fixedly connected to the operating ring, both ends of the sleeve are sealed and a sliding partition is provided inside, the sleeve is filled with an expansive fluid, a first through hole is provided on the edge or in the middle of the partition, the piston rod passes through both ends of the sleeve, and one end of the piston rod is connected to the limit head, and the middle part is connected to the partition.

[0011] Furthermore, the dilatant fluid is raw starch paste, cream or high molecular polymer solution.

[0012] Furthermore, a second through hole passing through the piston rod is provided at the end of the sleeve, and a sealing ring is provided at the second through hole.

[0013] Furthermore, the operating ring is provided with an embedding groove, the embedding groove is communicated with the side surface of the groove, and the sleeve is arranged in the embedding groove.

[0014] The beneficial effect of the present invention is that when collecting the dynamic steering force of a car, when the car is driving on actual roads or simulated roads in different scenes, the vibration generated during driving causes the driver's arm and the steering wheel to be relatively displaced, and the driver's handle action acts on the operating circle, and after being buffered by the buffer, the interference signal can be effectively filtered out, thereby reducing the influence of the relative displacement between the arm and the steering wheel on the result and improving the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a vehicle steering force detection device in Example 1 of the present application;

[0016] Figure 2 In Example 1 of this application Figure 1 Schematic diagram of the cross-sectional structure of AA;

[0017] Figure 3 In Example 1 of this application Figure 2 A schematic diagram of the enlarged structure of region A;

[0018] Figure 4 In Example 2 of this application, Figure 2 A schematic diagram of the enlarged structure of the A region;

[0019] Description of Figure Numbers:

[0020] 1. Dynamometer; 2. Fixed ring; 3. Movable ring; 4. Operating ring; 5. Buffer; 6. Clamping claw; 7. Force sensor; 8. First connecting piece; 9. Second connecting piece; 10. Reset spring; 11. Limiting head; 12. Groove; 13. Sleeve; 14. Piston rod; 16. Partition; 17. First through hole; 18. Second through hole; 19. Sealing ring; 20. Embedded groove. DETAILED DESCRIPTION

[0021] The technical solution of the present invention is further elaborated in detail below in conjunction with the drawings and specific embodiments of the specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. In the following description, the expression "some embodiments" is related to a subset of all possible embodiments, but it should be understood that "some embodiments" can be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0022] It should also be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "inside", "outside", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0023] Example 1

[0024] Please refer to the attached Figure 1 The present application provides a vehicle steering force detection device, comprising a dynamometer 1, a fixed ring 2, a movable ring 3 and an operating ring 4, wherein the fixed ring 2 is fixedly connected to the steering wheel of the vehicle, the movable ring 3 is slidably connected to the fixed ring 2, the dynamometer 1 connects the movable ring 3 and the fixed ring 2, the dynamometer 1 is used to detect the torque of the movable ring 3, the operating ring 4 is slidably connected to the movable ring 3, and the buffer 5 is connected to the operating ring 4 and the movable ring 3.

[0025] During the experiment, the fixed ring 2 is fixed on the steering wheel, and the movable ring 3 squeezes the dynamometer 1 when sliding relatively. The dynamometer 1 is used to check the torque of the movable ring 3, so as to collect the steering force of the car. During the operation, the driver controls the movement of the operating ring 4, and the operating ring 4 drives the movable ring 3 to move through the buffer 5 after the movement. When collecting the dynamic steering force of the car, the car is driving on actual roads or simulated roads in different scenes. When the vibration generated during driving causes the driver's arm and the steering wheel to have a relative displacement, the driver's handle action acts on the operating ring 4. After being buffered by the buffer 5, the interference signal can be effectively filtered out. Reduce the influence of the relative displacement between the arm and the steering wheel on the results, and improve the accuracy of the detection.

[0026] Specifically, the fixing ring 2 is provided with a clamping claw 6, which is used to clamp with the steering wheel. The fixing ring 2 is clamped on the steering wheel by the clamping claw 6, which is easy to operate and firmly fixed.

[0027] Specifically, the force sensor 1 includes a force sensor 7, a first connecting piece 8 and a second connecting piece 9. The first connecting piece 8 is connected to the fixed ring 2, the second connecting piece 9 is connected to the movable ring 3, and the force sensor 7 is connected to the first connecting piece 8 and the second connecting piece 9. When the movable ring 3 rotates, the movable ring 3 drives the second connecting piece 9 to move, and the second connecting piece 9 and the first connecting piece 8 squeeze the force sensor 7, and the signal of the force sensor 7 is collected to obtain the rotational torque of the steering wheel.

[0028] Specifically, the buffer 5 includes a return spring 10 and a limit head 11, the limit head 11 is fixedly connected to the movable ring 3, the operating ring 4 is provided with a groove 12 for inserting the limit head 11, the return spring 10 is arranged in the groove 12, and the return spring 10 is connected to the limit head 11. The return spring 10 makes the limit head 11 located at the center of the groove 12 when not acted upon by external force. When the vibration of the car is transmitted to the driver's arm, the relative displacement of the handle needs to pass through the return spring 10 and the fiber head to be transmitted to the movable ring 3, and the return spring 10 needs to be compressed and deformed during the transmission process, so that the displacement of the handle is delayed in the transmission time, and the displacement caused by vibration is often periodic, for example, the arm deviates to the left and right sides, and the force has not been completely transmitted to the movable ring 3 when it deviates to the left, and the arm has deviated to the right at this time, thereby weakening the generation of interference signals, and during the test, the driver will also consciously control the displacement caused by the vibration of the arm. The present invention can provide the driver with a longer reaction time, reduce the influence of the relative displacement of the arm and the steering wheel on the result, and improve the accuracy of the detection.

[0029] Specifically, the reset spring 10 is a coil spring, one end of which is fixedly connected to the operating ring 4 and the other end of which is sleeved with the limit head 11. The coil spring has a stable structure and can reset the limit head 11 to the middle of the groove 12.

[0030] Example 2

[0031] Please refer to the accompanying drawings. The difference between this embodiment and embodiment 1 is that the buffer 5 includes a sleeve 13, a piston rod 14 and a limit head 11. The limit head 11 is fixedly connected to the movable ring 3. The operating ring 4 is provided with a groove 12 for inserting the limit head 11. The sleeve 13 is fixedly connected to the operating ring 4. Both ends of the sleeve 13 are sealed and a slidable partition 16 is provided inside. The sleeve 13 is filled with an expansive fluid. Optionally, the expansive fluid is raw starch paste, cream or a high molecular polymer solution. A first through hole 17 is provided on the edge or in the middle of the partition 16. When the partition 16 is movable, the fluid flows between the cavities on both sides of the partition 16. The piston rod 14 passes through both ends of the sleeve 13, and one end of the piston rod 14 is movably connected to the limit head 11. For example, one end of the piston rod 14 is provided with a connecting ring, and the limit head 11 passes through the connecting ring to form a movable connection. The middle part of the piston rod 14 is connected to the partition 16. The sleeve 13 is filled with an expansive fluid, such as raw starch paste, cream or high molecular polymer solution. Under the action of external force, the viscosity of the fluid will increase due to the increase in shear rate. The force of the arm displacement driven by vibration during the driving of the car is small, and the corresponding amplitude and frequency are also relatively small. The arm displacement drives the displacement of the operating circle 4 and the movable circle 3 slowly. At this time, the movement speed of the sleeve 13 relative to the piston rod 14 and the partition 16 is small, the fluid passes smoothly through the first through hole 17, and the force of the arm displacement on the movable circle 3 is small. When the driver operates the steering wheel normally, the force of the arm acting on the operating circle 4 is large, and the corresponding amplitude and frequency are also relatively large. The arm displacement drives the instantaneous displacement speed of the operating circle 4 and the movable circle 3 to be large. At this time, the movement speed of the sleeve 13 relative to the piston rod 14 and the partition 16 is large, and the fluid is difficult to pass through the first through hole 17. The arm can directly control the steering wheel through the operating circle 4, the movable circle 3 and the fixed circle 2, thereby improving the response efficiency of operating the steering wheel.

[0032] Specifically, the end of the sleeve 13 is provided with a second through hole 18 that passes through the piston rod 14, and the second through hole 18 is provided with a sealing ring 19. The second through hole 18 of the sleeve 13 is sealed by the sealing ring 19 to prevent the fluid from leaking out of the second through hole 18.

[0033] Specifically, the operating ring 4 is provided with an embedding groove 20, the embedding groove 20 is communicated with the side of the groove 12, and the sleeve 13 is arranged in the embedding groove 20. The sleeve 13 is embedded in the groove 12 to improve the stability of the sleeve 13.

[0034] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. The protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A vehicle steering force detection device, characterized in that: It includes a force gauge, a fixed ring, a movable ring and an operating ring, wherein the fixed ring is fixedly connected to the steering wheel of the car, the movable ring is slidably connected to the fixed ring, the force gauge connects the movable ring and the fixed ring, the force gauge is used to detect the torque of the movable ring, the operating ring is slidably connected to the movable ring, and the buffer is connected to the operating ring and the movable ring.

2. The vehicle steering force detection device according to claim 1, characterized in that: The fixing ring is provided with a clamping claw, and the clamping claw is used for clamping with the steering wheel.

3. The vehicle steering force detection device according to claim 1, characterized in that: The force sensor comprises a force sensor, a first connecting piece and a second connecting piece, wherein the first connecting piece is connected to the fixed ring, the second connecting piece is connected to the movable ring, and the force sensor is connected to the first connecting piece and the second connecting piece.

4. The vehicle steering force detection device according to claim 1, characterized in that: The buffer includes a reset spring and a limit head, the limit head is fixedly connected to the movable ring, the operating ring is provided with a groove for inserting the limit head, the reset spring is arranged in the groove, and the reset spring is connected to the limit head.

5. The vehicle steering force detection device according to claim 4, characterized in that: The reset spring is a coil spring, one end of which is fixedly connected to the operating ring, and the other end of which is sleeved to the limit head.

6. The vehicle steering force detection device according to claim 1, characterized in that: The buffer includes a sleeve, a piston rod and a limit head, the limit head is fixedly connected to the movable ring, the operating ring is provided with a groove for inserting the limit head, the sleeve is fixedly connected to the operating ring, both ends of the sleeve are sealed and a sliding partition is provided inside, the sleeve is filled with an expansive fluid, a first through hole is provided on the edge or in the middle of the partition, the piston rod passes through both ends of the sleeve, one end of the piston rod is connected to the limit head, and the middle part is connected to the partition.

7. The vehicle steering force detection device according to claim 6, characterized in that: The dilatant fluid is raw starch paste, cream or high molecular polymer solution.

8. The vehicle steering force detection device according to claim 6, characterized in that: A second through hole through which the piston rod passes is formed at the end of the sleeve, and a sealing ring is formed at the second through hole.

9. The vehicle steering force detection device according to claim 6, characterized in that: The operating ring is provided with an embedding groove, the embedding groove is communicated with the side surface of the groove, and the sleeve is arranged in the embedding groove.

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