A device for measuring the radial stiffness of the tie rod inside the steering gear

Abstract

This utility model discloses a radial stiffness measuring device for the inner tie rod of a steering gear, relating to the field of automotive steering system testing. It aims to solve the problem that existing technologies only perform axial stiffness testing on the inner tie rod and cannot measure its radial stiffness. The technical solution adopted is as follows: An end fixing device is located on the worktable; a neck fixing device is located to the right of the end fixing device; a tension / compression mechanism is located to the right of the neck fixing device; the tension / compression mechanism is connected to the output head of a tension / compression machine; and a measuring mechanism is also located on the worktable, including a micrometer. The measuring end of the micrometer contacts the tension / compression mechanism, and the micrometer is electrically connected to a computer. This utility model uses the end fixing device and the neck fixing device to fix the inner tie rod, and uses upper and lower clamping blocks to fix the ball cup housing, and works with the tension / compression machine to achieve radial tension / compression. The radial stiffness of the inner tie rod is measured by measuring the offset of the upper clamping block using the micrometer.

Description

Technical Field

[0001] This utility model relates to the field of automotive steering system testing, specifically a device for measuring the radial stiffness of the tie rod inside the steering gear. Background Technology

[0002] The steering tie rod, a key component connecting the steering gear and chassis hinge in an automotive steering system, typically consists of three parts: the ball joint housing, the ball joint rod, and the ball joint cup. During the product design phase, stiffness testing of the steering tie rod accurately assesses the fit between the ball joint housing, ball joint rod, and ball joint cup. Based on the stiffness test values, the riveting degree of the ball joint housing is determined, continuously optimizing the reliability and operational stability of the steering tie rod. Existing tie rods only undergo axial stiffness testing. However, with increasingly stringent customer performance requirements, some OEMs are requesting radial stiffness measurement of the tie rod. Since there are no industry references for this, a radial stiffness measuring device for the tie rod needs to be designed to address this issue. Utility Model Content

[0003] The technical problem to be solved by this invention is to overcome the existing defects and provide a device for measuring the radial stiffness of the tie rod inside the steering gear, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model discloses a radial stiffness measuring device for the inner tie rod of a steering gear. The technical solution adopted includes a worktable with an end fixing device on the worktable, a neck fixing device on the right side of the end fixing device, a tension / compression mechanism on the right side of the neck fixing device, the tension / compression mechanism being connected to the output head of a tension / compression machine, and a measuring mechanism on the worktable. The measuring mechanism includes a micrometer, the measuring end of which is in contact with the tension / compression mechanism, and the micrometer being electrically connected to a computer.

[0005] As a preferred technical solution of this utility model, the worktable has a first slide groove and a second slide groove, the first slide groove and the second slide groove are T-shaped grooves, the end fixing device and the neck fixing device are fixed to the inside of the first slide groove by T-bolts, and the measuring mechanism is fixed to the inside of the second slide groove by T-bolts.

[0006] As a preferred technical solution of this utility model, the end fixing device includes an end support base and an end fixing block. The end support base is fixed to the inside of the first slide groove by a T-bolt, and the end fixing block is detachably connected to the end support base by a fixing bolt. A through hole is opened at the contact surface of the end support base and the end fixing block.

[0007] As a preferred technical solution of this utility model, the neck fixing device includes a neck support base and a neck fixing block. The neck support base is fixed to the inside of the first sliding groove by a T-bolt. The neck support base is detachably connected to the neck fixing block by a fixing bolt. The contact surfaces of the neck support base and the neck fixing block are provided with irregular holes.

[0008] As a preferred technical solution of this utility model, the tension and compression mechanism includes a connecting flange, which is connected to the output head of the tension and compression machine. An upper clamping block is fixedly connected below the connecting flange. The upper clamping block is detachably connected to a lower clamping block by fixing bolts. V-grooves are formed on the upper clamping block and the lower clamping block. The contact end of the micrometer is in contact with the surface of the upper clamping block.

[0009] As a preferred embodiment of this utility model, the measuring mechanism includes a slide rod with a base below it. The base is fixed to the inside of the second slide groove by a T-bolt. A sliding clamping block is slidably connected to the slide rod. The sliding clamping block has a first clamping hole and a second clamping hole. The sliding clamping block is slidably connected to the slide rod through the first clamping hole and locked by a fixing screw. A micrometer is slidably connected inside the second clamping hole and locked by a fixing screw.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model fixes the inner tie rod by means of the end fixing device and the neck fixing device, fixes the ball cup shell by means of the upper clamping block and the lower clamping block, and achieves radial tension and compression by means of the tension and compression machine, and measures the radial stiffness of the inner tie rod by means of the micrometer measuring the offset of the upper clamping block. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present utility model. Figure 1 ;

[0012] Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 2 ;

[0013] Figure 3 This is a cross-sectional view of the structure of this utility model;

[0014] Figure 4 This is a schematic diagram of the neck fixation device of this utility model;

[0015] Figure 5 This is a schematic diagram of the internal tie rod structure of this utility model.

[0016] In the figure: 1. Workbench; 101. First slide groove; 102. Second slide groove; 2. End fixing device; 201. End support base; 202. End fixing block; 3. Neck fixing device; 301. Neck support base; 302. Neck fixing block; 4. Tension and compression mechanism; 401. Connecting flange; 402. Upper clamping block; 403. Lower clamping block; 5. Measuring mechanism; 501. Slide rod; 502. Sliding clamping block; 503. Micrometer; 6. Inner tie rod; 601. End; 602. Neck; 603. Ball cup shell. Detailed Implementation

[0017] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example 1

[0018] like Figures 1 to 5 As shown, this utility model discloses a device for measuring the radial stiffness of a steering gear inner tie rod. The technical solution adopted includes a workbench 1 with a first slide groove 101 and a second slide groove 102. The first slide groove 101 and the second slide groove 102 are T-shaped grooves. An end fixing device 2 and a neck fixing device 3 are fixed to the inside of the first slide groove 101 by T-bolts. A measuring mechanism 5 is fixed to the inside of the second slide groove 102 by T-bolts. The workbench 1 has an end fixing device 2, and a neck fixing device 3 is located on the right side of the end fixing device 2. An inner tie rod 6 is located on the end fixing device 2 and the neck fixing device 3. The inner tie rod 6 includes an end 601 on the left side and a neck on the right side. 602, a ball joint with a ball-and-socket housing 603 is attached to the ball head at the end of the neck 602. A tension and compression mechanism 4 is located on the right side of the neck fixing device 3. The tension and compression mechanism 4 is connected to the output head of the tension and compression machine. The tension and compression mechanism 4 includes a connecting flange 401, which is connected to the output head of the tension and compression machine. An upper clamping block 402 is fixedly connected below the connecting flange 401. The upper clamping block 402 is detachably connected to a lower clamping block 403 by fixing bolts. V-grooves are provided on the upper clamping block 402 and the lower clamping block 403. A measuring mechanism 5 is also provided on the worktable 1. The measuring mechanism 5 includes a micrometer 503. The measuring end of the micrometer 503 is in contact with the tension and compression mechanism 4. The micrometer 503 is electrically connected to a computer.

[0019] As a preferred technical solution of this utility model, the end fixing device 2 includes an end support base 201 and an end fixing block 202. The end support base 201 is fixed to the inside of the first slide groove 101 by a T-bolt. The end fixing block 202 is detachably connected to the end support base 201 by a fixing bolt. A through hole is opened at the contact surface of the end support base 201 and the end fixing block 202, and the end 601 is fixed to the inside of the through hole.

[0020] As a preferred technical solution of this utility model, the neck fixing device 3 includes a neck support base 301 and a neck fixing block 302. The neck support base 301 is fixed to the inside of the first slide groove 101 by T-bolts. The neck support base 301 is detachably connected to the neck fixing block 302 by fixing bolts. The contact surfaces of the neck support base 301 and the neck fixing block 302 are provided with irregular holes. The irregular holes are matched with the surface of the neck 602, and the neck 602 is fixed inside the irregular holes, ensuring that the ball head of the inner tie rod 6 remains stationary during the application of tension and pressure.

[0021] As a preferred technical solution of this utility model, the measuring mechanism 5 includes a slide rod 501, a base below the slide rod 501, the base being fixed to the inside of the second slide groove 102 by T-bolts, a sliding clamping block 502 being slidably connected to the slide rod 501, the sliding clamping block 502 having a first clamping hole and a second clamping hole, the sliding clamping block 502 being slidably connected to the slide rod 501 through the first clamping hole and locked by a fixing screw, a micrometer 503 being slidably connected inside the second clamping hole and locked by a fixing screw, the contact end of the micrometer 503 contacting the surface of the upper clamping block 402 and maintaining a certain amount of compression, which can be adjusted by loosening the fixing screw.

[0022] The working principle of this utility model is as follows: First, the end fixing block 202 and the neck fixing block 302 are separated from the end support base 201 and the neck support base 301. The inner pull rod 6 is placed on the end support base 201 and the neck support base 301, and the end fixing block 202 and the neck fixing block 302 are fixed to the end support base 201 and the neck support base 301, thereby clamping the inner pull rod 6. The lower pressure block 403 is separated from the upper clamping block 402. The output shaft of the tension and pressure machine is controlled to drive the upper clamping block 402 to move down to a suitable position. The ball cup shell 603 is clamped by installing the lower clamping block 402. The position of the micrometer 503 is adjusted by loosening the fixing screw and sliding the sliding clamping block 502, so that the contact end of the micrometer 503 contacts the surface of the upper clamping block 402 and maintains a certain amount of compression, thereby completing the preparation work before the test.

[0023] The tension and compression machine is controlled to perform tension and compression. The displacement of the upper clamping block 402 is collected by the micrometer 503 and transmitted to the computer for recording. The relationship curve between load and displacement is plotted, thereby realizing the measurement of the radial stiffness of the tie rod inside the steering gear.

[0024] The circuits and mechanical connections involved in this utility model are common practices used by those skilled in the art, and technical inspiration can be obtained through a limited number of experiments. They are common knowledge.

[0025] Components not described in detail in this article are existing technologies.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for measuring the radial stiffness of a steering gear inner tie rod, comprising a worktable (1), characterized in that: The workbench (1) has an end fixing device (2), a neck fixing device (3) on the right side of the end fixing device (2), a tensioning mechanism (4) on the right side of the neck fixing device (3), the tensioning mechanism (4) is connected to the output head of the tensioning machine, the workbench (1) also has a measuring mechanism (5), the measuring mechanism (5) includes a micrometer (503), the measuring end of the micrometer (503) is in contact with the tensioning mechanism (4), and the micrometer (503) is electrically connected to a computer.

2. The device for measuring the radial stiffness of the tie rod inside a steering gear according to claim 1, characterized in that: The workbench (1) has a first slide (101) and a second slide (102). The first slide (101) and the second slide (102) are T-shaped grooves. The end fixing device (2) and the neck fixing device (3) are fixed to the inside of the first slide (101) by T-bolts. The measuring mechanism (5) is fixed to the inside of the second slide (102) by T-bolts.

3. The device for measuring the radial stiffness of the tie rod inside a steering gear according to claim 2, characterized in that: The end fixing device (2) includes an end support base (201) and an end fixing block (202). The end support base (201) is fixed to the inside of the first slide groove (101) by a T-bolt. The end fixing block (202) is detachably connected to the end support base (201) by a fixing bolt. A through hole is opened on the contact surface of the end support base (201) and the end fixing block (202).

4. The device for measuring the radial stiffness of the tie rod inside a steering gear according to claim 3, characterized in that: The neck fixation device (3) includes a neck support base (301) and a neck fixing block (302). The neck support base (301) is fixed to the inside of the first slide groove (101) by a T-bolt. The neck support base (301) is detachably connected to the neck fixing block (302) by a fixing bolt. The contact surfaces of the neck support base (301) and the neck fixing block (302) are provided with irregular holes.

5. The device for measuring the radial stiffness of the tie rod inside a steering gear according to claim 1, characterized in that: The tensioning mechanism (4) includes a connecting flange (401), which is connected to the output head of the tensioning machine. An upper clamping block (402) is fixedly connected below the connecting flange (401). The upper clamping block (402) is detachably connected to a lower clamping block (403) by fixing bolts. V-grooves are opened on the upper clamping block (402) and the lower clamping block (403). The contact end of the micrometer (503) is in contact with the surface of the upper clamping block (402).

6. The device for measuring the radial stiffness of the tie rod inside a steering gear according to claim 2, characterized in that: The measuring mechanism (5) includes a slide rod (501) with a base below it. The base is fixed to the inside of the second slide groove (102) by a T-bolt. A sliding clamp (502) is slidably connected to the slide rod (501). A first clamping hole and a second clamping hole are provided on the sliding clamp (502). The sliding clamp (502) is slidably connected to the slide rod (501) through the first clamping hole and locked by a fixing screw. A micrometer (503) is slidably connected inside the second clamping hole and locked by a fixing screw.

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