Spring rack for durability test of electric power steering gear assembly

By designing the lifting frame of the spring test bench and the sliding connection of the steering wheel assembly, the problems of diversity and mobility of the electric power steering assembly test device were solved, enabling various types of durability tests and reducing costs and complexity.

CN223500653UActive Publication Date: 2025-10-31SUZHOU HENGLU AUTO PARTS CO LTD
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Patent Information

Application Number
CN202423151213.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-12-19
Publication Date
2025-10-31
Estimated Expiration
2034-12-19

AI Technical Summary

Technical Problem

Existing electric power steering assembly testing equipment has limited functionality, cannot be used for various types of durability tests, and is complex in structure, difficult to move, and costly.

Method used

A spring test bench was designed, comprising a mounting base, a lifting frame, a steering wheel assembly, and a spring assembly. The height and angle of the steering wheel assembly are adjusted by the lifting frame, and the sliding connection between the slide plate and the steering wheel tray is combined to achieve durability testing of various types of electric power steering assemblies.

Benefits of technology

It enables durability testing of various types of electric power steering assemblies. The structure is simple, easy to operate, and movable, reducing the number of parts and processing and assembly costs. It simulates actual stress conditions, which facilitates quality control.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a spring rack for durability test of an electric power steering gear assembly. The spring rack comprises a mounting bottom plate, a lifting frame, a steering wheel assembly and a spring assembly, a lifting frame and a spring assembly are mounted on the mounting bottom plate; a steering wheel assembly is installed on the lifting frame and used for adjusting the height of the steering wheel assembly. The steering wheel assembly comprises a steering wheel tray and a sliding plate. The upper surface of the sliding plate is in sliding connection with the steering wheel tray; one end of the steering wheel shaft is connected with a steering wheel, and the other end of the steering wheel shaft is connected with a universal joint; the universal joint is used for connecting an input shaft of the electric power steering gear assembly; the spring assembly comprises a spring support, a spring is installed in the spring support, and the two ends of the spring are connected with a first spring connecting piece and a second spring connecting piece respectively. And the first spring connecting piece and the second spring connecting piece are used for connecting an inner pull rod of the electric power steering gear assembly. According to the utility model, durability tests can be carried out on various types of electric power steering gear assemblies.
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Description

Technical Field

[0001] This utility model relates to the field of automotive chassis steering technology, and in particular to a spring test bench for durability testing of electric power steering assembly. Background Technology

[0002] As automobiles enter the era of intelligent technology, the requirements for the integration and spatial structure of automotive components are becoming increasingly stringent. The maturity of steer-by-wire technology has driven the development of electric power steering (EPS). EPS eliminates the need for the power steering pump, hoses, hydraulic fluid, transmission belt, and engine-mounted pulleys required by mechanical steering systems, saving energy and protecting the environment. Currently, EPS is in its developmental stage, and durability testing of EPS is becoming particularly important given various automotive usage scenarios and complex road conditions.

[0003] The existing durability testing equipment for electric power steering (EPS) assemblies has the following problems:

[0004] 1. Existing electric power steering assembly (EPS assembly) testing equipment has limited functionality and cannot be used for durability testing of various types of electric power steering assemblies (EPS assemblies).

[0005] 2. Existing electric power steering assembly (EPS assembly) testing equipment is mostly fixed, which is not easy to move and is not suitable for multi-site display or durability testing.

[0006] 3. Existing electric power steering assembly (EPS assembly) testing equipment has a complex structure, involves a large number of parts, and has high costs for parts processing and assembly. Utility Model Content

[0007] This invention proposes a spring test stand for durability testing of electric power steering (EPS) assemblies, in order to solve the technical problem that existing EPS assembly testing devices have limited functionality and cannot be used for various EPS assembly durability tests.

[0008] One aspect of this utility model is to provide a spring test bench for durability testing of an electric power steering assembly, the spring test bench comprising: a mounting base plate, a lifting frame, a steering wheel assembly, and a spring assembly;

[0009] The lifting frame and the spring assembly are mounted on the mounting base; the steering wheel assembly is mounted on the lifting frame for adjusting the height of the steering wheel assembly;

[0010] The steering wheel assembly includes at least: a steering wheel tray and a sliding plate; the steering wheel tray is connected to the lifting frame, and the upper surface of the sliding plate is slidably connected to the lower surface of the steering wheel tray;

[0011] A steering wheel shaft is mounted on the lower surface of the skateboard. One end of the steering wheel shaft is connected to the steering wheel, and the other end is connected to a universal joint. The universal joint is used to connect the input shaft of the electric power steering assembly.

[0012] The spring assembly includes: a spring frame, in which a spring is installed, and the two ends of the spring are respectively connected to a first spring connector and a second spring connector;

[0013] The first spring connector and the second spring connector are used to connect the inner tie rod of the electric power steering assembly.

[0014] In a preferred embodiment, the lifting frame includes a lifting sleeve and a lifting rod;

[0015] The steering wheel tray is connected to the riser lever. The riser lever is inserted into the riser sleeve and adjusted by multiple adjusting bolts to adjust the height of the riser lever inserted into the riser sleeve, thereby adjusting the height of the steering wheel assembly.

[0016] In a preferred embodiment, the steering wheel tray is fixedly connected to the riser lever.

[0017] In a preferred embodiment, the steering wheel tray is rotatably connected to the lift lever.

[0018] In a preferred embodiment, a slide rail is provided on the upper surface of the skateboard, and a slide groove is formed on the lower surface of the steering wheel tray;

[0019] The slide rail and the slide groove slide together to connect the upper surface of the slide plate with the lower surface of the steering wheel tray.

[0020] In a preferred embodiment, a fixed bushing is provided on the lower surface of the skateboard, and the steering wheel shaft is rotatably mounted within the bushing.

[0021] In a preferred embodiment, the first spring connector fixes the first connecting block, and the second spring connector fixes the second connecting block;

[0022] The first connecting block and the second connecting block are used to connect the inner tie rod of the electric power steering assembly.

[0023] In a preferred embodiment, the mounting base plate has multiple screw holes for securing the electric power steering assembly with bolts.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] This invention proposes a spring test bench for durability testing of electric power steering (EPS) assemblies. A steering wheel assembly is mounted on a lifting frame and slidably connected to the lower surface of the steering wheel tray via a sliding plate. Adjusting the height of the steering wheel assembly adjusts the height of the universal joint connected to the steering wheel shaft, thereby adjusting the height of the input shaft of the EPS assembly. This allows the spring test bench to be applicable to various types of EPS assemblies, enabling durability testing of these assemblies.

[0026] This utility model proposes a spring stand for durability testing of electric power steering assembly. It is easy to move, suitable for display or durability testing in multiple occasions, has fewer parts, and has low costs for parts processing and assembly.

[0027] This invention proposes a spring test bench for durability testing of electric power steering (EPS) assemblies. It is easy to manufacture, small in size, movable, space-saving, and facilitates process quality control. The spring force effectively simulates the actual stress conditions of the EPS assembly, making durability testing convenient. Attached Figure Description

[0028] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a spring test bench for durability testing of an electric power steering assembly, as shown in this utility model, from one perspective.

[0030] Figure 2 This is a structural schematic diagram of the steering wheel assembly of this utility model.

[0031] Figure 3 This is a schematic diagram of the structure of a spring test bench for durability testing of an electric power steering assembly, as presented in this utility model, from another perspective. Detailed Implementation

[0032] To make the above and other features and advantages of this utility model clearer, the utility model will be further described below with reference to the accompanying drawings. It should be understood that the specific embodiments given herein are for the purpose of explanation to those skilled in the art, and are exemplary only, not restrictive.

[0033] Combination Figures 1 to 3According to an embodiment of the present invention, a spring test bench for durability testing of an electric power steering assembly (EPS assembly) is provided, comprising: a mounting base 1, a lifting frame 4, a steering wheel assembly 2, and a spring assembly 3. The lifting frame 4 and the spring assembly 3 are mounted on the mounting base 1; the steering wheel assembly 2 is mounted on the lifting frame 4 for adjusting the height of the steering wheel assembly 2.

[0034] like Figure 1 and Figure 2 As shown, the steering wheel assembly 2 includes: a steering wheel tray 201, a sliding plate 202, a bushing 203, a steering wheel shaft 204, a universal joint 205, and a steering wheel 206.

[0035] The steering wheel tray 201 is connected to the lifting frame 4, and the upper surface of the slide plate 202 is slidably connected to the lower surface of the steering wheel tray 201.

[0036] Specifically, a slide rail (not shown in the figure) is provided on the upper surface of the skateboard 202, and a slide groove 2011 (e.g., ...) is provided on the lower surface of the steering wheel tray 201. Figure 2 As shown, the slide rail and the slide groove 2011 slide together to connect the upper surface of the slide plate 202 with the lower surface of the steering wheel tray 201.

[0037] A steering wheel shaft 204 is mounted on the lower surface of the skateboard 202. One end of the steering wheel shaft 204 is connected to the steering wheel 206, and the other end is connected to a universal joint 205. The universal joint 205 is used to connect the input shaft of the electric power steering assembly (EPS assembly).

[0038] Furthermore, a fixed bushing 203 is attached to the lower surface of the skateboard 202, and the steering wheel shaft 204 is rotatably mounted inside the bushing 203.

[0039] According to an embodiment of the present invention, a steering wheel assembly 2 is installed on the lifting frame 4 to adjust the height of the steering wheel assembly 2, thereby adjusting the height of the universal joint 205 connected to the steering wheel shaft 204 and the height of the steering wheel 206.

[0040] Specifically, the lifting frame 4 includes a lifting sleeve 401, a lifting rod 402, and multiple adjusting bolts 403. The steering wheel tray 201 is connected to the lifting rod 402, and the lifting sleeve 401 is connected to the mounting base plate 1. The lifting rod 402 is inserted into the lifting sleeve 401, and the height of the lifting rod 402 inserted into the lifting sleeve 401 is adjusted by the multiple adjusting bolts 403, thereby adjusting the height of the steering wheel assembly 2.

[0041] like Figure 3As shown, in this embodiment, the steering wheel tray 201 is fixedly connected to the riser lever 402, for example, by bolts. In some other preferred embodiments, the steering wheel tray 201 and the riser lever 402 are rotatably connected to adjust the angle of the steering wheel 206 and the universal joint 205, thereby adjusting the angle of the input shaft of the electric power steering assembly (EPS assembly).

[0042] Combination Figure 1 and Figure 3 According to an embodiment of the present invention, the spring assembly 3 includes a spring frame 301, a spring 302, a first spring connector 303, and a second spring connector 304.

[0043] The spring bracket 301 is connected to the mounting base plate 1. A spring 302 is installed inside the spring bracket 301. The two ends of the spring 302 are respectively connected to the first spring connector 303 and the second spring connector 304. The first spring connector 303 and the second spring connector 304 are used to connect the inner tie rod of the electric power steering assembly (EPS assembly).

[0044] In a further embodiment, the first spring connector 303 fixes the first connecting block 305, and the second spring connector 304 fixes the second connecting block 306. For example, the first spring connector 303 is fixed to the first connecting block 305 by bolts, and the second spring connector 304 is fixed to the second connecting block 306 by bolts.

[0045] The first connecting block 305 and the second connecting block 306 are used to connect the inner tie rod of the electric power steering assembly (EPS assembly).

[0046] like Figure 3 As shown, the mounting base plate 1 of this utility model has multiple screw holes 101 for fixing the electric power steering assembly (EPS assembly) with bolts. A travel wheel 102 is mounted on the lower surface of the mounting base plate 1 to facilitate the movement of a spring test bench used for durability testing of the electric power steering assembly (EPS assembly).

[0047] The following describes the usage process of this utility model.

[0048] When a durability test is required on an electric power steering assembly (EPS assembly), the EPS assembly to be tested is first mounted on a spring test bench provided by this utility model for durability testing of electric power steering assemblies (EPS assemblies).

[0049] The electric power steering assembly (EPS assembly) is fixed to the mounting base plate 1 through multiple screw holes 101.

[0050] Adjust the height of the lifting rod 402 inserted into the lifting sleeve 401, adjust the height of the steering wheel assembly 2, thereby adjusting the height of the universal joint 205 connected to the steering wheel shaft 204 and the height of the steering wheel 206, so that the height of the universal joint 205 is adapted to the height of the input shaft of the electric power steering assembly (EPS assembly) to be tested, and fix the lifting rod 402 and the lifting sleeve 401 by adjusting the bolt 403.

[0051] Adjusting the slide plate 202 to slide relative to the steering wheel tray 201, the slide plate 202 drives the bushing 203, steering wheel shaft 204, universal joint 205 and steering wheel 206 to slide relative to the steering wheel tray 201, so that the universal joint 205 is connected to the input shaft of the electric power steering assembly (EPS assembly) under test, connecting the universal joint 205 to the input shaft of the electric power steering assembly (EPS assembly) under test.

[0052] In some embodiments, the steering wheel tray 201 is rotatably connected to the riser lever 402 to adjust the angle of the steering wheel 206 and the universal joint 205, thereby adjusting the angle of the input shaft of the electric power steering assembly (EPS assembly).

[0053] The inner tie rods at both ends of the electric power steering assembly (EPS assembly) are fixed to the first connecting block 305 and the second connecting block 306 respectively, thus completing the installation of the electric power steering assembly (EPS assembly).

[0054] After installation, a durability test was conducted on the electric power steering assembly (EPS assembly):

[0055] Rotating the steering wheel 206 causes the steering wheel shaft 204, universal joint 205, and input shaft of the electric power steering assembly (EPS assembly) to rotate, causing the rack of the electric power steering assembly (EPS assembly) to move left and right, thereby driving the inner tie rod to compress or extend the spring 302, and performing a durability test on the electric power steering assembly (EPS assembly).

[0056] When it is necessary to conduct durability tests on different types of electric power steering assemblies (EPS assemblies), the corresponding type of electric power steering assembly (EPS assembly) can be installed on the spring test stand for durability testing of electric power steering assembly (EPS assembly) provided by this utility model according to the above installation method, and the durability test can be carried out.

[0057] This invention uses a lifting frame 4 to mount a steering wheel assembly 2, which is slidably connected to the lower surface of the steering wheel tray 201 via the upper surface of a sliding plate 202. Adjusting the height of the steering wheel assembly 2 allows for adjustment of the height of the universal joint 205 connected to the steering wheel shaft 204, and consequently, the height of the input shaft of the electric power steering assembly. This enables the spring test bench to be used for various types of electric power steering assemblies (EPS assemblies) for durability testing. This invention is simple in structure, easy to operate, and highly flexible, suitable for durability testing of various types of electric power steering assemblies (EPS assemblies).

[0058] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A spring test bench for durability testing of electric power steering assembly, characterized in that, The spring frame includes: a mounting base plate, a lifting frame, a steering wheel assembly, and a spring assembly; The lifting frame and the spring assembly are mounted on the mounting base; the steering wheel assembly is mounted on the lifting frame for adjusting the height of the steering wheel assembly; The steering wheel assembly includes at least: a steering wheel tray and a sliding plate; the steering wheel tray is connected to the lifting frame, and the upper surface of the sliding plate is slidably connected to the lower surface of the steering wheel tray; A steering wheel shaft is mounted on the lower surface of the skateboard. One end of the steering wheel shaft is connected to the steering wheel, and the other end is connected to a universal joint. The universal joint is used to connect the input shaft of the electric power steering assembly. The spring assembly includes: a spring frame, in which a spring is installed, and the two ends of the spring are respectively connected to a first spring connector and a second spring connector; The first spring connector and the second spring connector are used to connect the inner tie rod of the electric power steering assembly.

2. The spring stand according to claim 1, characterized in that, The lifting frame includes a lifting sleeve and a lifting rod; The steering wheel tray is connected to the riser lever. The riser lever is inserted into the riser sleeve and adjusted by multiple adjusting bolts to adjust the height of the riser lever inserted into the riser sleeve, thereby adjusting the height of the steering wheel assembly.

3. The spring stand according to claim 2, characterized in that, The steering wheel tray is fixedly connected to the lifting lever.

4. The spring stand according to claim 2, characterized in that, The steering wheel tray is rotatably connected to the lifting lever.

5. The spring stand according to claim 1, characterized in that, The upper surface of the skateboard is provided with a slide rail, and the lower surface of the steering wheel tray is provided with a slide groove; The slide rail and the slide groove slide together to slidably connect the upper surface of the slide plate with the lower surface of the steering wheel tray.

6. The spring stand according to claim 1, characterized in that, The lower surface of the skateboard is fixed with a bushing, and the steering wheel shaft is rotatably mounted inside the bushing.

7. The spring stand according to claim 1, characterized in that, The first spring connector fixes the first connecting block, and the second spring connector fixes the second connecting block; The first connecting block and the second connecting block are used to connect the inner tie rod of the electric power steering assembly.

8. The spring stand according to claim 1, characterized in that, The mounting base plate has multiple screw holes for fixing the electric power steering assembly with bolts.