A terminal pull-out force testing fixture

Abstract

This utility model relates to the field of wire harness processing technology. A terminal pull-out force testing fixture includes a base, two limiting blocks, and a cover plate. The two limiting blocks are located between the base and the cover plate. A first limiting boss extending to one side of the limiting blocks is provided on the top of the base. A second limiting boss extending to one side of the limiting blocks is provided on the top of the cover plate. A first notch for embedding the first limiting boss and a second notch for embedding the second limiting boss are provided on opposite sides of the top of the two limiting blocks. Third limiting bosses extending close to each other are provided on adjacent sides of the two limiting blocks. The base, the two limiting blocks, and the cover plate form four limiting surfaces for clamping the terminal housing. The first, second, and third limiting bosses of this utility model achieve mutual positioning of the base, limiting blocks, and cover plate, preventing misalignment. Simultaneously, they limit the terminal housing during the pull-out test.

Description

Technical Field

[0001] This utility model relates to the field of wire harness processing technology, specifically to a terminal pull-out force testing fixture. Background Technology

[0002] Pull-out force fixtures typically use only two limiting blocks with contour grooves to fix the terminals. If the contour grooves are misaligned, it will affect the test results.

[0003] A terminal pull-out force testing fixture disclosed in patent CN210401064U uses four circumferentially arranged locking blocks to fix the terminal. This terminal fixing structure requires adjusting the locking blocks in four directions, which is cumbersome. Utility Model Content

[0004] In view of the problems existing in the prior art, this utility model provides a terminal pull-out force testing fixture to solve at least one of the above technical problems.

[0005] To achieve the above objectives, this utility model provides a terminal pull-out force testing fixture, characterized in that it includes a base, two limiting blocks, and a cover plate, with the two limiting blocks located between the base and the cover plate;

[0006] At least two positioning pins are fixed on the base, and a first limiting boss extending toward one side of the limiting block is provided on the top of the base.

[0007] Both limiting blocks have through holes for the positioning pin to pass through;

[0008] The cover plate has a through hole for the positioning pin to pass through, and the top of the cover plate is provided with a second limiting boss extending toward one side of the limiting block.

[0009] The top of the two limiting blocks has a first notch for embedding the first limiting boss and a second notch for embedding the second limiting boss on opposite sides;

[0010] A third limiting boss that extends close to each other is provided on the adjacent sides of the two limiting blocks;

[0011] The base, two limiting blocks, and cover plate form four limiting surfaces of the housing for clamping the terminals;

[0012] The first limiting boss, the second limiting boss, and the third limiting boss form a U-shaped limiting structure for abutting the outer shell of the terminal.

[0013] This invention optimizes the structure of the fixing fixture and, in conjunction with the clamping mechanism of the pull-out force testing machine, facilitates the clamping of the terminal shell on all four sides. Furthermore, the first, second, and third limiting bosses achieve mutual positioning of the base, limiting block, and cover plate, preventing misalignment. Simultaneously, they limit the position of the terminal shell during the pull-out test. The terminal shell is rectangular and is limited by the inner walls of the limiting block, base, and cover plate.

[0014] More preferably, the adjacent sides of the two limiting blocks are provided with avoidance notches for avoiding the elastic claws on the housing.

[0015] More preferably, the first notch and the second notch are cuboid notches at the two edges of the top of the limiting block.

[0016] More preferably, two positioning pins are provided;

[0017] Each of the limiting blocks has a through hole for the positioning pin to pass through.

[0018] More preferably, the first limiting boss, the second limiting boss, and the third limiting boss form a square hole structure.

[0019] The square hole structure is used to limit the inward bending of the terminal.

[0020] This allows for the limiting of the terminal position.

[0021] More preferably, the lower end faces of the first limiting boss, the second limiting boss, and the third limiting boss are flush.

[0022] A further preferred embodiment includes a clamp for a pull-out force testing machine, the clamp comprising two opposing clamping plates that clamp the base, the limiting block, and the cover plate;

[0023] The base is in contact with one of the clamping pieces;

[0024] The cover plate is in contact with another clamping piece.

[0025] To facilitate clamping of the fixtures on the pull-out force testing machine.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] This invention can effectively simplify the terminals and fixtures, and ensure the positioning and fixing of the terminals. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure after mounting the terminal in a specific embodiment 1 of this utility model;

[0029] Figure 2 This is a schematic diagram of another structure after the mounting terminal is installed in specific embodiment 1 of this utility model;

[0030] Figure 3 This is a schematic diagram of the structure of the base of a specific embodiment 1 of this utility model;

[0031] Figure 4 This is a schematic diagram of the structure of the limiting block in specific embodiment 1 of this utility model;

[0032] Figure 5 This is a schematic diagram of the structure after the base and the limiting block are connected in a specific embodiment of this utility model;

[0033] Figure 6 This is a structural schematic diagram of the base and the limiting block after they are connected in a specific embodiment of the present invention from another perspective;

[0034] Figure 7 This is a structural schematic diagram of the base and the limiting block after they are connected in a specific embodiment of the present invention from another perspective;

[0035] Figure 8 This is a schematic diagram of the cover plate of a specific embodiment 1 of the present utility model.

[0036] In the diagram: 1 is the base, 2 is the limiting block, 3 is the cover plate, 4 is the terminal, 11 is the positioning pin, 12 is the first limiting boss, 21 is the first notch, 22 is the second notch, 23 is the third limiting boss, 31 is the second limiting boss, and 41 is the outer shell. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings.

[0038] See Figures 1 to 8A terminal pull-out force testing fixture includes a base 1, two limiting blocks 2, and a cover plate 3. The two limiting blocks 2 are located between the base 1 and the cover plate 3. At least two positioning pins 11 are fixed on the base 1, and a first limiting boss 12 extending towards one side of the limiting blocks 2 is provided on the top of the base 1. Each of the two limiting blocks 2 has a through hole for the positioning pins 11 to pass through. The cover plate 3 has a through hole for the positioning pins 11 to pass through, and a second limiting boss 31 extending towards one side of the limiting blocks 2 is provided on the top of the cover plate 3. The top of the two limiting blocks 2 has a first notch 21 for embedding the first limiting boss 12 and a second notch 22 for embedding the second limiting boss 31 on opposite sides; the adjacent sides of the two limiting blocks 2 have a third limiting boss 23 extending close to each other; the base 1, the two limiting blocks 2, and the cover plate 3 form four limiting surfaces for clamping the outer shell 41 of the terminal 4; the first limiting boss 12, the second limiting boss 31, and the third limiting boss 23 form a U-shaped limiting structure for abutting the outer shell 41 of the terminal 4. This utility model optimizes the structure of the fixing fixture and, in conjunction with the clamping mechanism of the pull-out force testing machine, facilitates the clamping of the outer shell 41 of the terminal 4 on all four sides. The first limiting boss 12, the second limiting boss 31, and the third limiting boss 23 achieve mutual positioning of the base 1, the limiting blocks 2, and the cover plate 3, preventing misalignment. At the same time, it achieves the limiting of the outer shell 41 of the terminal 4 during the pull-out test.

[0039] The adjacent sides of the two limiting blocks 2 are provided with clearance notches for avoiding the elastic claws on the housing 41.

[0040] The first notch 21 and the second notch 22 are cuboid notches at the top two edges of the limiting block 2.

[0041] There are two positioning pins 11; each limiting block 2 has a through hole for the positioning pin 11 to pass through.

[0042] The first limiting boss 12, the second limiting boss 31, and the third limiting boss 23 form a square hole structure; the square hole structure is used to limit the bending and inward retraction of the terminal 4, thereby achieving the limitation of the terminal 4.

[0043] The lower surfaces of the first limiting boss 12, the second limiting boss 31, and the third limiting boss 23 are flush. The longitudinal height of the first notch 21 and the second notch 22 matches the longitudinal height of the third limiting boss 23.

[0044] The device also includes a fixture for a pull-out force testing machine. The fixture comprises two opposing clamping plates that clamp a base 1, a limiting block 2, and a cover plate 3. The base 1 is in contact with one clamping plate, and the cover plate 3 is in contact with the other clamping plate. This facilitates the clamping of the pull-out force testing machine. The fixture is prior art and will not be described in detail in this application.

[0045] In use, the limiting block is assembled on the base, the terminal is placed into the groove formed by the base and the limiting block, and the cover plate is fixed by passing it through the positioning pin. The crimping end of the terminal extends outward from the base from the first limiting boss and the second limiting boss.

[0046] The fixture, consisting of the base, limit block, and cover plate, is clamped by the jig of the pull-out force testing machine.

[0047] The above are merely preferred embodiments of this utility model. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model.

Claims

1. A terminal pull force test fixing jig characterized by, It includes a base, two limiting blocks, and a cover plate, with the two limiting blocks located between the base and the cover plate; At least two positioning pins are fixed on the base, and a first limiting boss extending toward one side of the limiting block is provided on the top of the base. Both limiting blocks have through holes for the positioning pin to pass through; The cover plate has a through hole for the positioning pin to pass through, and the top of the cover plate is provided with a second limiting boss extending toward one side of the limiting block. The top of the two limiting blocks has a first notch for embedding the first limiting boss and a second notch for embedding the second limiting boss on opposite sides; A third limiting boss that extends close to each other is provided on the adjacent sides of the two limiting blocks; The base, two limiting blocks, and cover plate form four limiting surfaces of the housing for clamping the terminals; The first limiting boss, the second limiting boss, and the third limiting boss form a U-shaped limiting structure for abutting the outer shell of the terminal.

2. The terminal pull force test fixture of claim 1, wherein: The adjacent sides of the two limiting blocks are provided with clearance notches for avoiding the elastic claws on the housing.

3. The terminal pull force test fixture of claim 1, wherein: The first notch and the second notch are cuboid notches at the two edges of the top of the limiting block.

4. The terminal pull force test fixture of claim 1, wherein: Two positioning pins are provided; Each of the limiting blocks has a through hole for the positioning pin to pass through.

5. The terminal pull force test fixture of claim 1, wherein: The first limiting boss, the second limiting boss, and the third limiting boss form a square hole structure. The square hole structure is used to limit the inward bending of the terminal.

6. The terminal pull force test fixture of claim 1, wherein: The lower surfaces of the first limiting boss, the second limiting boss, and the third limiting boss are flush.

7. The terminal pull force test fixture of claim 1, wherein: It also includes a fixture for a pull-out force testing machine, the fixture comprising two opposing clamping plates that clamp the base, the limiting block, and the cover plate; The base is in contact with one of the clamping pieces; The cover plate is in contact with another clamping piece.

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