Auxiliary tool for testing hardness of supporting arm of automobile suspension cushion

Abstract

The utility model relates to the field of automobile spare parts, in particular to an auxiliary device for a hardness test of an automobile suspension cushion support arm, which comprises a flat-plate-shaped base, at least two studs are vertically arranged on the base, the studs are matched with fixing holes on a test surface of the suspension cushion support arm to be tested, and screw rods of the studs are sleeved with nuts. According to the scheme, when the suspension cushion supporting arm to be tested is subjected to hardness testing, the stud is directly sleeved with the mounting hole of the part to be tested of the suspension cushion supporting arm to be tested, the nut on the stud is located on the lower portion of the suspension cushion supporting arm to be tested, and the weight of other parts of the suspension cushion assembly is borne by the base; during hardness testing, the auxiliary tool is directly placed on an objective table of a durometer, interference of the shape of the cushion supporting arm on the hardness testing is avoided, and testing can be directly carried out without sample preparation work such as cutting, grinding and polishing.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts, in particular to an auxiliary device for testing the hardness of an automobile suspension cushion support arm. Background Art

[0002] The suspension cushion assembly is an important component connecting the automobile body and the powertrain, including the suspension cushion bracket, suspension cushion outer shell, main spring rubber, base and other components. It is used to support the powertrain and plays a role in fixing and shock absorption. It is one of the key automobile parts. The suspension cushion bracket is usually divided into cast iron and aluminum alloy. Since the ductility of these two materials is not high, the failure form is mostly brittle fracture. Therefore, the hardness test of the part body is an important means to detect its mechanical properties.

[0003] The conventional performance verification of the suspension cushion support arm includes material performance verification, part performance verification, and assembly performance verification. The suspension cushion support arm mainly bears bending stress. Due to the complexity of the vehicle movement, its force direction is also variable. Therefore, whether the mechanical strength of the part meets the design requirements is the key verification content of the part performance verification. The mechanical strength of the part is guaranteed by the strength of the part body material. The structure and shape of the suspension cushion support arm determine that it is difficult to verify the tensile strength. The industry generally uses the general test method of GB / T231.1 or GB / T230.1 to verify it by the hardness test method. The general test method of GB / T231.1 or GB / T230.1 requires that the hardness test test surface is parallel to the support surface. However, the shape of the suspension cushion support arm is difficult to meet this requirement, and cutting, grinding and polishing and other sample preparation work are required, which is labor-intensive and inefficient. There is currently no professional experimental auxiliary device for the hardness test of the suspension cushion support arm. Utility Model Content

[0004] The utility model aims to provide a suspension cushion support arm hardness test aid. When the automobile cushion support arm is subjected to a hardness test, the tested part is supported and supported, and the interference of the shape of the suspension cushion assembly on the hardness test can be ignored. The test can be directly carried out without cutting, grinding and polishing and other sample preparation work.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an auxiliary tool for testing the hardness of an automobile suspension cushion arm, comprising a flat base, on which at least two studs are vertically arranged, and the studs are adapted to the fixing holes on the test surface of the suspension cushion arm to be tested, and a nut is sleeved on the screw rod of the stud.

[0006] In the above scheme, when the hardness test is carried out on the suspended cushion support arm to be tested, the mounting hole of the tested part of the suspended cushion support arm to be tested is directly placed on the stud, and the nut on the stud is located at the lower part of the suspended cushion support arm to be tested. The weight of other parts of the suspended cushion assembly is borne by the base. When the hardness test is carried out, the auxiliary tool can be directly placed on the stage of the hardness tester, avoiding the interference of the shape of the cushion support arm on the hardness test, and the test can be carried out directly without cutting, grinding and polishing and other sample preparation work. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of a hardness testing aid of the utility model;

[0008] Figure 2 It is a schematic diagram of the base 10 of the auxiliary tool of the utility model;

[0009] Figure 3 It is a schematic diagram of a nut 20 of the auxiliary tool of the utility model;

[0010] Figure 4 It is a schematic diagram of the counterweight 50 of the auxiliary tool of the utility model;

[0011] Figure 5 It is a schematic diagram of the auxiliary tool of the utility model in use. DETAILED DESCRIPTION

[0012] The technical solution of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0013] An auxiliary tool for testing the hardness of an automobile suspension cushion support arm, characterized in that it includes a flat base 10, on which at least two studs 20 are vertically arranged, the studs 20 are adapted to the fixing holes on the test surface of the suspension cushion support arm A1 to be tested, and a nut 21 is sleeved on the screw rod of the stud 20.

[0014] During the hardness test, first place the auxiliary tool horizontally on the stage B1 of the hardness tester B (either Brinell or Rockwell hardness tester), adjust the position of the nut 21 on the stud 20, and then pass the mounting and fixing hole on the suspension cushion support arm A1 of the suspension cushion assembly A to be tested onto the stud. Note that the height of the stud should be lower than the upper surface of A1 to avoid the stud affecting the hardness test. The hardness test auxiliary tool is equivalent to raising the suspension cushion support arm A1 to be tested with the nut 21 on the stud 20, forcing it to be in a horizontal hardness test state, while the weight of other parts of the suspension cushion assembly A is supported by the base 10. During the actual test, the nut and stud bear the downward pressure load of the hardness tester B.

[0015] As a preferred solution, a lifting platform 30 is provided on the base 10, and the distance between the lifting platform 30 and the base 10 is adjustable. A through hole 31 is provided on the lifting platform 30 at a position corresponding to the stud 20. The lifting platform 30 is arranged above the base, and the suspension cushion assembly A is supported by the lifting platform 30. By adjusting the distance between the lifting platform 30 and the base 10, the suspension cushion assembly A of various sizes or models and specifications can be adapted.

[0016] Furthermore, the upper plate surface of the base 10 is provided with a closing groove 11 with an inverted T-shaped cross section with the notch facing upward, and the bolt head 22 at the lower end of the stud 20 is accommodated in the groove cavity of the closing groove 11 and forms a sliding fit. Figure 1-3 As shown, two studs 20 are provided, and the bolt head provided at the lower end of the stud 20 can be square, and the closing groove on the base 10 serves as a sliding guide rail for the bolt head 22, so that the distance between the studs 20 can be adjusted to adapt to the fixing hole distance of the suspension cushion support arm A of different specifications.

[0017] An adjustment unit 40 is provided between the base 10 and the lifting platform 30. Figure 1 As shown, the base 10 and the lifting platform 30 are rectangular in shape, and screws and nuts are arranged at the four corners of the two, which can adjust the distance between the two on the one hand, and adjust the lifting platform 30 to a horizontal position on the other hand. Further, a level is arranged on the lifting platform 30.

[0018] The through holes 31 arranged on the lifting platform 30 at positions corresponding to the studs 20 are strip-shaped holes to cooperate with the studs 20 to adjust the spacing.

[0019] The base 10 is provided with a counterweight 50, the weight of which is equivalent to the weight of the suspension cushion assembly A to be tested. The counterweight 50 is provided to prevent the suspension cushion assembly A from being too heavy, causing the center of gravity of the entire test aid to shift, and the stud 20 to bear an eccentric torque, which affects the hardness test results. Counterweights 50 of different weights can be made according to the weight of different models of suspension cushion assemblies A.

[0020] The auxiliary tool for testing the hardness of the suspended cushion support arm involved in the utility model can be applicable to various types of suspended cushion support arms A1, and can greatly improve the working efficiency of the hardness test of the suspended cushion support arm; it can cooperate with various Brinell and Rockwell hardness testers to realize the hardness test of the suspended cushion support arm A1, and has a wide adaptability to hardness testing machines; it can adapt to various types of suspended cushion support arms A1 by only adjusting the position of the stud 20, and has a wide adaptability to parts; when the auxiliary tool of the utility model is used for hardness testing, there is no need to perform sample preparation work such as cutting and polishing, and the workload is small and the efficiency is high.

Claims

1. An auxiliary tool for testing the hardness of a car suspension cushion support arm, characterized in that: The invention comprises a flat base (10), on which at least two studs (20) are vertically arranged, the studs (20) are matched with fixing holes on a test surface of a suspended cushion support arm (A1) to be tested, and nuts (21) are sleeved on the screw rods of the studs (20).

2. The vehicle suspension cushion support arm hardness testing aid according to claim 1, characterized in that: A lifting platform (30) is provided on the base (10); the distance between the lifting platform (30) and the base (10) is adjustable; and a through hole (31) is provided on the lifting platform (30) at a position corresponding to the stud (20).

3. The vehicle suspension cushion support arm hardness testing aid according to claim 1, characterized in that: The upper plate surface of the base (10) is provided with a closing groove (11) with an upward notch and an inverted T-shaped cross section, and the bolt head (22) at the lower end of the stud (20) is accommodated in the groove cavity of the closing groove (11) to form a sliding fit.

4. The vehicle suspension cushion support arm hardness testing aid according to claim 2, characterized in that: An adjustment unit (40) matched with a screw and a nut is provided between the base (10) and the lifting platform (30).

5. The vehicle suspension cushion support arm hardness testing aid according to claim 2, characterized in that: The through hole (31) arranged on the lifting platform (30) at the position corresponding to the stud (20) is a strip-shaped hole.

6. The vehicle suspension cushion support arm hardness testing aid according to claim 1, characterized in that: A counterweight (50) is provided on the base (10), and the weight of the counterweight (50) is equivalent to the weight of the suspended cushion assembly (A) to be tested.

7. The vehicle suspension cushion support arm hardness testing aid according to claim 2, characterized in that: The lifting platform (30) is provided with a level.

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