An experimental device for detecting backlash in automotive steering gear screws.

Abstract

This utility model relates to the field of steering gear lead screw assembly testing technology, specifically, to an experimental device for detecting the backlash of automotive steering gear lead screws. The structure provided by this utility model mainly includes a displacement sensor module mounted on a base, two push-pull units, and a lead screw bracket. The lead screw bracket is used to mount the automotive steering gear lead screw, the push-pull units are used to push and pull the automotive steering gear lead screw, and the displacement sensor module is used to collect displacement data. This structure enables the real-time displacement of the lead screw to be read and recorded by the displacement sensor. Simultaneously, a servo electric cylinder generates push-pull force to simulate the actual driving conditions of a car.

Description

Technical Field

[0001] This utility model relates to the field of steering gear screw assembly testing technology, and more specifically, to an experimental device for testing the clearance of automotive steering gear screws. Background Technology

[0002] In automotive steering systems, the lead screw converts the rotational motion of the motor into lateral motion. As a critical component, the lead screw's clearance significantly impacts the entire steering system's response; therefore, the clearance between the lead screw and its nut is crucial. Existing lead screw testing devices for clearance detection under no-load conditions are general-purpose devices. However, the actual operating conditions of automotive steering systems are far more complex: high loads, rapid changes, and numerous operating scenarios. Therefore, existing devices cannot accurately simulate the actual rear-wheel steering conditions of a car. Furthermore, they cannot apply dynamic loads to the lead screw or determine the deformation of the lead screw and its nut under extreme operating conditions. Therefore, a dedicated testing device for testing critical components within automotive steering systems is needed. Utility Model Content

[0003] The purpose of this invention is to provide a relay calibration device to solve the problem that existing technologies cannot simulate the actual working conditions of rear wheel steering in automobiles.

[0004] This utility model is achieved through the following technical solution:

[0005] An experimental device for detecting the backlash of a car steering gear lead screw includes a displacement sensor module mounted on a base, two push-pull units, and a lead screw bracket. The two push-pull units are located on both sides of the lead screw bracket. The lead screw bracket is used to mount the car steering gear lead screw, and the push-pull units are used to push and pull the car steering gear lead screw. The displacement sensor module is connected to one of the push-pull units to collect displacement data.

[0006] Preferably, the push-pull unit includes a power unit and a push-pull force sensor. One end of the push-pull force sensor is connected to the push-pull unit, and the other end is connected to the steering gear screw of the vehicle via a double-ended stud.

[0007] Preferably, the power unit includes a servo electric cylinder and a cylinder bracket, wherein the servo electric cylinder is mounted on the base via the cylinder bracket.

[0008] Preferably, a positioning block is provided on one side of the push-pull unit, and the positioning block is fixed on the base.

[0009] Preferably, the displacement sensor module is disposed on the positioning block. The displacement sensor module includes a connecting rod, a displacement sensor, and a displacement sensor bracket. The displacement sensor is disposed on the positioning block through the displacement sensor bracket, and one end of the displacement sensor is connected to the telescopic end of the servo electric cylinder through the connecting rod.

[0010] Preferably, the lead screw support includes a force-bearing support and two support supports, the force-bearing support is disposed between the two support supports, and both the force-bearing support and the support supports have through holes in the middle, and the lead screw moves within the through holes.

[0011] Preferably, the support bracket includes two removable pressure blocks.

[0012] Preferably, the force-bearing bracket and the two support brackets are both disposed on the support plate, and the support plate is disposed on the base.

[0013] The technical solution of this utility model has at least the following advantages and beneficial effects:

[0014] The structure provided by this utility model mainly includes a displacement sensor module mounted on a base, two push-pull units, and a lead screw bracket. The lead screw bracket is used to mount the automotive steering gear lead screw, the push-pull units are used to push and pull the automotive steering gear lead screw, and the displacement sensor module is used to collect displacement data. This structure enables the real-time displacement of the lead screw to be read and recorded by the displacement sensor. Simultaneously, a push-pull force is generated by a servo electric cylinder to simulate the actual driving conditions of a car. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a front view structural diagram of the present utility model;

[0018] Figure 3 This is a top view of the structure of this utility model.

[0019] Icons: 1-Servo electric cylinder, 2-Electric cylinder bracket, 3-Push-pull force sensor, 4-Double-ended stud, 5-Support bracket, 6-Screw assembly, 7-Force support bracket, 8-Screw nut, 9-Support plate, 10-Base, 11-Positioning block, 12-Displacement sensor, 13-Connecting rod. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Please refer to Figures 1-3 An experimental device for detecting the backlash of a car steering gear lead screw includes a displacement sensor module, two push-pull units, and a lead screw bracket mounted on a base 10. The two push-pull units are located on both sides of the lead screw bracket. The lead screw bracket is used to mount the car steering gear lead screw. The push-pull units are used to push and pull the car steering gear lead screw. The displacement sensor module is connected to one of the push-pull units to collect displacement data.

[0022] The structure provided by this utility model mainly includes a displacement sensor module mounted on the base 10, two push-pull units, and a lead screw bracket. The lead screw bracket is used to mount the automotive steering gear lead screw, the push-pull units are used to push and pull the automotive steering gear lead screw, and the displacement sensor module is used to collect displacement data. This structure enables the real-time displacement of the lead screw to be read and recorded by the displacement sensor 12. Simultaneously, a push-pull force is generated by a servo electric cylinder to simulate the actual driving conditions of a car.

[0023] In one embodiment, the push-pull unit includes a power unit and a push-pull force sensor 3. One end of the push-pull force sensor 3 is connected to the push-pull unit, and the other end is connected to the steering gear screw of the car through a double-ended stud 4. The power unit includes a servo cylinder 1 and a cylinder bracket 2. The servo cylinder 1 is mounted on the base 10 through the cylinder bracket 2. A positioning block 11 is provided on one side of the push-pull unit and the positioning block 11 is fixed on the base 10.

[0024] In one embodiment, the displacement sensor module is disposed on the positioning block 11. The displacement sensor module includes a connecting rod 13, a displacement sensor 12, and a displacement sensor 12 bracket. The displacement sensor 12 is disposed on the positioning block 11 through the displacement sensor 12 bracket, and one end of the displacement sensor 12 is connected to the telescopic end of the servo electric cylinder 1 through the connecting rod 13.

[0025] Preferably, the lead screw support includes a force-bearing support 7 and two support supports 5. The force-bearing support 7 is disposed between the two support supports 5. Both the force-bearing support 7 and the support supports 5 have through holes in their middle parts, and the lead screw moves within the through holes. Secondly, the support supports 5 include two detachable pressure blocks. The force-bearing support 7 and the two support supports 5 are both disposed on a support plate 9, which is disposed on the base 10.

[0026] Specifically, during use, the lead screw assembly 6 to be tested is fixed on the lead screw bracket, and the lead screw nut 8 is fixed in the intermediate force-bearing bracket 7. Clamping blocks are located on the outside, and bolts are used to tighten the screws to prevent lateral movement. The two side support brackets 5 provide support force and have internal grooves to fix the cylinder sleeves, allowing the two long and short shaft mechanisms to slide left and right. Push-pull force sensors 3 are fixed on both sides of the sliding long and short shafts, one on each side. The outer side of the push-pull force sensors 3 is connected to the servo cylinder 1. The push-pull force sensors 3 are connected to the sliding long shaft shaft and externally connected to the displacement sensor 12. All brackets are fixed to the experimental platform. The long strip in the middle of the experimental platform serves as the reference axis and is fixed in the middle position of the experimental platform.

[0027] The test bracket for the lead screw assembly 6 provides support and fixation for the lead screw assembly 6 under test. The central force-bearing bracket 7 fixes the lead screw nut 8, while the two side support brackets 5 provide support, causing axial displacement of the assembly. This bracket assembly is fixed to the experimental platform. The double-ended studs 4 on both sides are connected to push-pull force sensors 3, which read and record the push-pull force generated by the servo electric cylinder 1 on the lead screw assembly 6 in real time. One side of the double-ended studs 4 is connected to a displacement sensor 12 through a connecting block to read and record the real-time displacement of the lead screw. The servo electric cylinders on both sides of the tension and compression sensors generate push-pull forces, accurately simulating the actual driving conditions of a car. It is fixed to the experimental platform by the bracket. The middle strip is a positioning block 11, which is installed tightly against the bracket to ensure the coaxiality of the lead screw assembly 6 experimental device.

[0028] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A test apparatus for detecting the backlash of an automotive steering gear lead screw, characterized in that, It includes a displacement sensor module, two push-pull units, and a lead screw bracket mounted on a base (10). The two push-pull units are located on both sides of the lead screw bracket. The lead screw bracket is used to mount the car steering gear lead screw. The push-pull units are used to push and pull the car steering gear lead screw. The displacement sensor module is connected to one of the push-pull units to collect displacement data.

2. The experimental device for detecting the backlash of an automotive steering gear lead screw according to claim 1, characterized in that, The push-pull unit includes a power unit and a push-pull force sensor (3). One end of the push-pull force sensor (3) is connected to the push-pull unit, and the other end is connected to the steering screw of the car via a double-ended stud (4).

3. The experimental device for detecting the backlash of an automotive steering gear lead screw according to claim 2, characterized in that, The power unit includes a servo electric cylinder (1) and an electric cylinder bracket (2), wherein the servo electric cylinder (1) is mounted on the base (10) via the electric cylinder bracket (2).

4. The experimental device for detecting the backlash of an automotive steering gear lead screw according to claim 3, characterized in that, A positioning block (11) is provided on one side of the push-pull unit, and the positioning block (11) is fixed on the base (10).

5. The experimental device for detecting the backlash of an automotive steering gear lead screw according to claim 4, characterized in that, The displacement sensor (12) module is mounted on the positioning block (11). The displacement sensor module includes a connecting rod (13), a displacement sensor (12), and a displacement sensor bracket. The displacement sensor (12) is mounted on the positioning block (11) via the displacement sensor bracket. One end of the displacement sensor (12) is connected to the telescopic end of the servo electric cylinder (1) via the connecting rod (13).

6. The experimental device for detecting the backlash of an automotive steering gear lead screw according to claim 5, characterized in that, The lead screw support includes a force-bearing support (7) and two support supports (5). The force-bearing support (7) is disposed between the two support supports (5). Both the force-bearing support (7) and the support supports (5) have through holes in their middle parts, and the automotive steering gear lead screw moves within the through holes.

7. The experimental device for detecting the backlash of an automotive steering gear lead screw according to claim 6, characterized in that, The support bracket (5) includes two removable pressure blocks.

8. The experimental device for detecting the backlash of an automotive steering gear lead screw according to claim 7, characterized in that, The force-bearing bracket (7) and the two support brackets (5) are both mounted on the support plate (9), which is mounted on the base (10).

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