A test fixture for testing automotive parts

Abstract

A test tool for testing automobile accessories, comprising a test platform, a fixed end provided on a connecting frame of the test platform, used for connecting a connecting part of an accessory to be tested, so that a mounting hole and an arm part of the accessory to be tested can be exposed, and the connecting frame can change the angle relative to the test platform, used for adjusting the specified position of the fixed end between a first position and a second position, wherein the first position is a test position of the mounting hole, that is, the axis direction D2 of the fixed end is adjusted to a specified position with an angle of α degrees compared with the loading force direction D1 of the loading member; the second position is a test position of the arm part, that is, the axis direction D2 of the fixed end is adjusted to a specified position parallel to the loading force direction D1 of the loading member, so that the accessory to be tested with different detection parts and the required loading directions of different detection parts form an included angle α, and the accessory to be tested can complete the test on one detection tool, thereby improving the detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of automotive performance testing equipment, and more particularly to a testing fixture for testing automotive parts. Background Technology

[0002] For testing automotive parts, the applicant generally uses test fixtures similar to those in "Publication No. CN217483876U" or "Publication No. CN217483876U". These fixtures employ a test platform, connecting mechanism, or loading mechanism to load test the workpiece under test. Alternatively, they may be similar to the workbench, actuator fixed on the gantry, and load-applying fixture mechanism used in "A Comprehensive Test Bench and Method for Engineering Machinery Tracks" (application No. CN202410125314.8). These test fixtures are suitable for loading tests on one part of the workpiece under test. If the workpiece under test has multiple parts that need to be tested, different test fixtures may need to be used.

[0003] If the workpiece to be tested is as follows Figure 1 The shock absorber fork shown includes a connecting part 1' for connecting to the shock absorber, two arms 3' coaxially arranged with the connecting part 1', and a mounting hole 2' on the outer wall of the connecting part 1' for mounting a stabilizer bar. When the shock absorber fork is in use, the force direction of the connecting part 1' and the force direction of the mounting hole 2' form an angle α. To ensure the reliability of the suspension system, the working load test of the mounting hole 2' becomes crucial. However, due to the special structure of the shock absorber fork, namely, the force direction of the connecting part 1' forms an angle α with the force direction of the mounting hole 2', if any of the above-mentioned test fixtures is used to test the working load of the mounting hole 2', the following problems will exist: First, the test platform used for connecting the workpiece to be tested and the fixture mechanism used to apply the load are generally fixed in their positions, and can only load one part, that is, can only test the two arms 3'. Since they are different test parts of the same workpiece to be tested, if the mounting hole 2' also needs to be tested, the test fixture or the test site needs to be changed, which is relatively cumbersome for the operators and requires further improvement. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a test fixture for testing automotive parts that can reduce the workload required by operators during the inspection process, especially suitable for situations where different inspection parts of the same workpiece require loading directions that form an angle α.

[0005] The technical solution adopted by the present invention to solve the above-mentioned technical problem is as follows: the test fixture for testing automotive parts includes:

[0006] Test platform;

[0007] a loading member arranged on the test platform;

[0008] a connecting member for connecting the accessory to be tested to the loading end of the loading member;

[0009] wherein the detection part of the accessory to be tested comprises a mounting hole and an arm part, the arm part is in the same straight line relative to the loading force direction D1 of the loading member, and the mounting hole forms an included angle α relative to the loading force direction D1 of the loading member; characterized in that:

[0010] a fixed end arranged on the connecting frame of the test platform, for connecting the connecting part of the accessory to be tested, so that the mounting hole and the arm part of the accessory to be tested can be exposed;

[0011] the connecting member comprises a first connecting assembly for connecting the mounting hole and a second connecting assembly for connecting the arm part, and the first connecting assembly and the second connecting assembly are selectively arranged and connected on the loading end of the loading member;

[0012] the connecting frame can change the angle relative to the test platform, for adjusting the specified position of the fixed end between the first position and the second position, wherein the first position is the test position of the mounting hole, that is, the axis direction D2 of the fixed end is adjusted to the specified position with an offset angle of α degrees relative to the loading force direction D1 of the loading member;

[0013] the second position is the test position of the arm part, that is, the axis direction D2 of the fixed end is adjusted to the specified position parallel to the loading force direction D1 of the loading member.

[0014] In order to detect the working load of the mounting hole, preferably, the first connecting assembly comprises a first connecting piece for connecting the mounting hole and a first transmission arm connected with the first connecting piece, and the first transmission arm is connected to the loading end of the loading member and can transmit the loading force of the loading member to the first connecting piece. When testing the working load of the mounting hole, the first connecting assembly is connected to the loading end of the loading member, and the fixed end is in the first position with an offset angle of α degrees relative to the loading force direction of the loading member.

[0015] In order to simulate the stress direction of the mounting hole in actual use, preferably, the first connecting piece is rotationally connected to the first transmission arm. The rotational connection can keep the force direction of the loading member unchanged during testing, avoiding the change of the force direction during testing and affecting the test results due to the torsional force on the mounting hole.

[0016] In order to rotate the first connecting piece on the first transmission arm, preferably, the first connecting piece comprises a ball head and a protruding part protruding from the ball head and capable of being inserted into the mounting hole to connect the mounting holes, the first end of the first transmission arm is connected to the loading end of the loading member, and the second end is provided with a receiving part for receiving the ball head, and the first connecting piece can be rotated relative to the first transmission arm by means of the cooperation of the ball head and the receiving part. The cooperation of the ball head and the receiving part can simulate the force exerted by the stabilizing rod on the mounting hole during actual use of the accessory to be tested, so that the test result is more consistent with the actual use scene.

[0017] In order to test the working load of the arm part, the arm part comprises a first arm part and a second arm part arranged in parallel with the first arm part, the second connecting assembly comprises a second connecting piece capable of connecting the first arm part and the second arm part at the same time and a second transmission assembly connected to the loading end of the loading member and capable of transmitting the loading force of the loading member to the second connecting piece. When testing the working load of the arm part, the second connecting assembly is connected to the loading end of the loading member, and the fixed end is in a second position parallel to the direction of the loading force of the loading member.

[0018] In order to realize that the second connecting piece can connect the first arm part and the second arm part at the same time, preferably, the second connecting piece comprises first and second parallel walls, and third and fourth walls connecting the first and second walls, the first wall is partially protruding to form a first protruding block, and the second wall is partially protruding to form a second protruding block, wherein the first arm part has a first connecting hole, and the second arm part has a second connecting hole, the first protruding block can be inserted into the first connecting hole to connect the first arm part, and the second protruding block can be inserted into the second connecting hole to connect the second arm part. In this way, the first arm part and the second arm part are connected by one connecting block, and force can be applied to both arm parts at the same time, and when the first arm part or the second arm part yields, the result obtained is the maximum load of the accessory to be tested.

[0019] In order to transmit the tension or pressure of the loading member to the second connecting piece, preferably, the second transmission assembly comprises a second transmission arm, a third transmission arm arranged in parallel with the second transmission arm, and a fourth transmission arm connecting the tail of the second transmission arm and the tail of the third transmission arm, the fourth transmission arm is connected to the loading end of the loading member, and the head of the second transmission arm and the head of the third transmission arm are connected to the second connecting piece. The transmission mode of two transmission arms can make the force of the two arm parts uniform, so that the test result is more accurate, in addition, the mode of connecting one transmission arm to the second connecting piece can also be used to transmit the tension or pressure of the loading member to the second connecting piece.

[0020] In order to further ensure that the two arm portions are stressed evenly, preferably, the third wall surface portion is protruded to form a third protruding block, the fourth wall surface portion is protruded to form a fourth protruding block, the head of the second transmission arm is provided with a second insertion hole, the third protruding block can be inserted into the second insertion hole to connect the second transmission arm and the second connecting piece, the head of the third transmission arm is provided with a third insertion hole, and the fourth protruding block can be inserted into the third insertion hole to connect the third transmission arm and the second connecting piece. The second transmission arm and the third transmission arm are respectively connected at the centers of the upper and lower sides of the second connecting piece, so that the stress point of the second connecting piece is located at the gravity center position of the second connecting piece, and the accuracy of the test result is further ensured.

[0021] Compared with the prior art, the test tool has the advantages that the connecting member comprises a first connecting assembly for connecting the mounting hole and a second connecting assembly for connecting the arm portion, one of the first connecting assembly and the second connecting assembly can be arranged on the power output end of the loading member according to the detection position of the tested accessory, the fixed end can be switched between the first position at an angle of α degrees with the loading force direction of the loading member and the second position parallel to the loading force direction of the loading member according to the detection position of the tested accessory, the tested accessory with different detection positions and different required loading directions forming the angle α can be tested on one detection tool, and the detection efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of a damping fork in the background art of the present application;

[0023] Figure 2 It is a structure schematic view of a damping fork in the embodiment of the present application;

[0024] Figure 3 It is a structure schematic view of the first connecting assembly connected to the loading member in the embodiment of the present application;

[0025] Figure 4 It is an enlarged view of B in FIG. 5; Figure 3

[0026] Figure 5 It is an exploded view of the first connecting assembly in the embodiment of the present application;

[0027] Figure 6 It is a top view of the first connecting assembly and the fixed end in the embodiment of the present application;

[0028] Figure 7 It is a sectional view of C-C in FIG. 6; Figure 6

[0029] Figure 8 It is a structure schematic view of the second connecting assembly connected to the loading member in the embodiment of the present application; ​​

[0030] Figure 9 This is an exploded view of the second connecting component and the fixed end in an embodiment of the present invention;

[0031] Figure 10 This is a schematic diagram of the structure of the second connecting component in an embodiment of the present invention;

[0032] Figure 11 This is an exploded view of the second connecting component in an embodiment of the present invention. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0034] like Figures 2-11 As shown, this is a preferred embodiment of the present invention. The test fixture for testing automotive parts in this embodiment includes a test platform 1 and a loading member 3 disposed on the test platform 1, a connecting member for connecting the part to be tested A to the loading end of the loading member 3, and a fixing end 6. In this embodiment, the part to be tested A is a shock absorber fork, such as... Figure 2 As shown, the shock absorber fork includes a connecting part A3 for connecting with the shock absorber, a mounting hole A1 on the outer wall of the connecting part A3 for mounting a stabilizer bar, and an arm part A2 coaxially disposed with the connecting part A3. The arm part A2 includes a first arm part A21 and a second arm part A22 spaced apart from the first arm part A21.

[0035] The connecting components include a first connecting assembly 4 for connecting the mounting hole A1 and a second connecting assembly 5 for connecting the arm A2. Either the first connecting assembly 4 or the second connecting assembly 5 is selectively connected to the power output end of the loading member 3. The fixed end 6 is located on the connecting frame of the test platform 1 and is used to connect the connecting part A3 of the accessory to be tested A, allowing the mounting hole A1 and the arm A2 of the accessory to be tested A to be exposed. The connecting frame can change its angle relative to the test platform 1 to adjust the predetermined position of the fixed end 6 between a first position and a second position. The first position is the test position of the mounting hole A1, i.e., the axial direction D2 of the fixed end 6 is adjusted to a predetermined position with an angle of α degrees relative to the loading force direction D1 of the loading member 3. The second position is the test position of the arm A2, i.e., the axial direction D2 of the fixed end 6 is adjusted to a predetermined position parallel to the loading force direction D1 of the loading member 3.

[0036] like Figures 3-4As shown, when the detection part is the mounting hole A1, the first connecting assembly 4 is arranged to be connected to the loading end of the loading member 3, at this time, the adjusting fixed end 6 is adjusted to the first position described above. The first connecting assembly 4 in this embodiment includes a first connecting piece 41 for connecting the mounting hole A1, and a first transmission arm 42 connected to the first connecting piece 41, the first transmission arm 42 is connected to the loading end of the loading member 3 and can transmit the loading force of the loading member 3 to the first connecting piece 41, and the first connecting piece 41 is rotationally connected to the first transmission arm 42. Specifically, as shown in Figures 5-7 The first connecting piece 41 includes a ball head 41a and a protruding part 41b partially protruding from the ball head 41a and capable of being inserted into the mounting hole A1, the first end of the first transmission arm 42 is connected to the loading end of the loading member 3, and the second end is provided with a receiving part 42a for receiving the ball head 41a, by means of the cooperation of the ball head 41a and the receiving part 42a, the first connecting piece 41 can rotate relative to the first transmission arm 42. The cooperation of the ball head 41a and the receiving part 42a can simulate the force exerted by the stabilizing rod on the mounting hole A1 when the accessory A to be tested is actually used, so that the test result is more consistent with the actual use scene, and the ball head 41a and the receiving part 42a can rotate relative to each other, so that the force direction of the loading member 3 can be kept unchanged during testing, avoiding the change of the force direction during testing and affecting the test result due to the torsional force on the mounting hole A1.

[0037] As shown in Figure 8 When the detection part is the arm part A2, the second connecting assembly 5 is arranged to be connected to the loading end of the loading member 3, at this time, the adjusting fixed end 6 is adjusted to the second position described above. Since the accessory A to be tested includes a first arm part A21 and a second arm part A22 arranged in a spaced manner with the first arm part A21, in order to test the working load of the first arm part A21 and the second arm part A22 at the same time, the second connecting assembly 5 needs to connect the first arm part A21 and the second arm part A22 at the same time, as shown in Figures 9-11As shown, the second connecting assembly 5 of the embodiment comprises a second connecting piece 51 capable of connecting the first arm portion A21 and the second arm portion A22 simultaneously, and a second transmission assembly 52 connected to the loading end of the loading member 3 and capable of transmitting the loading force of the loading member 3 to the second connecting piece 51. Specifically, the second connecting piece 51 comprises a first wall surface 51a and a second wall surface 51b arranged in parallel, and a third wall surface 51c and a fourth wall surface 51d connecting the first wall surface 51a and the second wall surface 51b, wherein the first wall surface 51a is partially protruded to form a first protruding block 511, the second wall surface 51b is partially protruded to form a second protruding block 512, the first arm portion A21 has a first connecting hole A211, the second arm portion A22 has a second connecting hole A221, the first protruding block 511 is capable of being inserted into the first connecting hole A211, and the second protruding block 512 is capable of being inserted into the second connecting hole A221, so as to simultaneously connect the first arm portion A21 and the second arm portion A22. The second transmission assembly 52 comprises a second transmission arm 521, a third transmission arm 522 arranged in parallel with the second transmission arm 521, and a fourth transmission arm 523 connecting the tail of the second transmission arm 521 and the tail of the third transmission arm 522, the fourth transmission arm 523 is connected to the loading end of the loading member 3, the central portion of the third wall surface 51c is protruded to form a third protruding block 513, the head of the second transmission arm 521 is provided with a second insertion hole 524, the third protruding block 513 is capable of being inserted into the second insertion hole 524 to connect the head of the second transmission arm 521 and the second connecting piece 51, the central portion of the fourth wall surface 51d is protruded to form a fourth protruding block 514, the head of the third transmission arm 522 is provided with a third insertion hole 525, and the fourth protruding block 514 is capable of being inserted into the third insertion hole 525 to connect the head of the third transmission arm 522 and the second connecting piece 51. The transmission mode of the two transmission arms can make the force of the first arm portion A21 and the second arm portion A22 uniform, so as to make the test result more accurate, and the second transmission arm 521 and the third transmission arm 522 are respectively connected to the upper and lower central portions of the second connecting piece 51, which can ensure that the stress point of the second connecting piece 51 is at the gravity center position, and further ensure the accuracy of the test result.

[0038] The test tool of the embodiment can select the first connecting assembly 4 or the second connecting assembly 5 to be connected to the power output end of the loading member 3 according to the detection position of the shock absorber fork, and when the first connecting assembly 4 is connected to the loading end of the loading member 3, the fixed end 6 can be correspondingly adjusted to be in the first position at an angle α with the loading force direction of the loading member or in the second position parallel to the loading force direction of the loading member. When the first connecting assembly 4 is connected to the loading end of the loading member 3 and the fixed end 6 is in the first position, the mounting hole A1 of the shock absorber fork can be tested. When the second connecting assembly 51 is connected to the loading end of the loading member 3 and the fixed end 6 is in the second position, the arm A2 of the shock absorber fork can be tested, and the loading direction forms an angle α with the same tested accessory A in different detection positions.

Claims

1. A test fixture for testing automobile parts, comprising: a test platform (1); a loading member (3) arranged on the test platform (1); a connecting member for connecting a part (A) to be tested to a loading end of the loading member (3); a detection part of the part (A) to be tested comprises a mounting hole (A1) and an arm part (A2), the arm part (A2) is in the same straight line relative to a loading force direction D1 of the loading member (3), and the mounting hole (A1) forms an included angle a with the loading force direction D1 of the loading member (3); characterized in that: a fixed end (6) is arranged on a connecting frame of the test platform (1) and is used for connecting a connecting part (A3) of the part (A) to be tested, so that the mounting hole (A1) and the arm part (A2) of the part (A) to be tested can be exposed; the connecting member comprises a first connecting assembly (4) for connecting the mounting hole (A1) and a second connecting assembly (5) for connecting the arm part (A2), and the first connecting assembly (4) and the second connecting assembly (5) are selectively arranged on the loading end of the loading member (3); the connecting frame can change the angle relative to the test platform (1) and is used for adjusting the specified position of the fixed end (6) between a first position and a second position, wherein the first position is a test position of the mounting hole (A1), that is, the axis direction D2 of the fixed end (6) is adjusted to a specified position with an included angle a relative to the loading force direction D1 of the loading member (3); and the second position is a test position of the arm part (A2), that is, the axis direction D2 of the fixed end (6) is adjusted to a specified position parallel to the loading force direction D1 of the loading member (3). The first connecting assembly (4) comprises a first connecting piece (41) for connecting the mounting hole (A1) and a first transmission arm (42) connected with the first connecting piece (41), and the first transmission arm (42) is connected to the loading end of the loading member (3) and can transmit the loading force of the loading member (3) to the first connecting piece (41). The first connecting piece (41) is rotationally connected to the first transmission arm (42). The first connecting piece (41) comprises a ball head (41a) and a protruding part (41b) protruding from the ball head (41a) and capable of being inserted into the mounting hole (A1) to connect with the mounting hole (A1), a first end of the first transmission arm (42) is connected to the loading end of the loading member (3), and a second end is provided with a receiving part (42a) for receiving the ball head (41a), and by means of cooperation of the ball head (41a) and the receiving part (42a), the first connecting piece (41) can rotate relative to the first transmission arm (42). wherein ​ ​ ​ ​ ​ 2. The test fixture of claim 1, wherein: ​ 3. The test fixture of claim 2, wherein: ​ 4. The test fixture of claim 3, wherein: ​ 5. The test fixture of claim 1, wherein: The arm portion (A2) comprises a first arm portion (A21) and a second arm portion (A22) arranged in a spaced manner with the first arm portion (A21), and the second connecting assembly (5) comprises a second connecting piece (51) capable of simultaneously connecting the first arm portion (A21) and the second arm portion (A22), and a second transmission assembly (52) connected to the loading end of the loading member (3) and capable of transmitting the loading force of the loading member (3) to the second connecting piece (51).

6. The test fixture of claim 5, wherein: The second connecting piece (51) comprises a first wall surface (51a) and a second wall surface (51b) arranged in parallel, and a third wall surface (51c) and a fourth wall surface (51d) connecting the first wall surface (51a) and the second wall surface (51b), the first wall surface (51a) is partially protruding to form a first protruding block (511), and the second wall surface (51b) is partially protruding to form a second protruding block (512), wherein the first arm portion (A21) has a first connecting hole (A211), and the second arm portion (A22) has a second connecting hole (A221), the first protruding block (511) can be inserted into the first connecting hole (A211) to connect with the first arm portion (A21), and the second protruding block (512) can be inserted into the second connecting hole (A221) to connect with the second arm portion (A22).

7. A test fixture according to claim 6, characterised in that: The second transmission assembly (52) comprises a second transmission arm (521), a third transmission arm (522) arranged in a spaced manner with the second transmission arm (521), and a fourth transmission arm (523) connecting the tail of the second transmission arm (521) and the tail of the third transmission arm (522), the fourth transmission arm (523) is connected to the loading end of the loading member (3), and the head of the second transmission arm (521) and the head of the third transmission arm (522) are connected with the second connecting piece (51).

8. The test fixture of claim 7, wherein: The third wall surface (51c) is partially protruding to form a third protruding block (513), the fourth wall surface (51d) is partially protruding to form a fourth protruding block (514), the head of the second transmission arm (521) is provided with a second insertion hole (524), the third protruding block (513) can be inserted into the second insertion hole (524) to connect the second transmission arm (521) and the second connecting piece (51), and the head of the third transmission arm (522) is provided with a third insertion hole (525), the fourth protruding block (514) can be inserted into the third insertion hole (525) to connect the third transmission arm (522) and the second connecting piece (51).

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