Pullout force testing tool

Abstract

The utility model discloses a pullout force testing tool, the pullout force testing tool comprises a tool main body and a clamping part, the tool main body is suitable for being fixedly connected with a tensile machine, the clamping part is fixedly connected with the tool main body, and the clamping part is fixedly connected with the tool main body. The clamping part and the tool body are opposite and spaced so that an assembly space can be formed between the clamping part and the tool body, the clamping part defines a clamping notch communicated with the assembly space, the clamping notch is provided with an inner end and an open end which are opposite to each other, and the inner end and the open end of the clamping notch are communicated with the assembly space in the direction from the inner end to the open end. And the width size of the clamping notch is gradually increased. According to the pullout force test tool, the pullout force test tool is simple in structure, high in universality, simple in test process, low in test cost, high in test efficiency and high in test data accuracy.

Description

Technical Field

[0001] The utility model relates to the field of testing tools, in particular to a pull-out force testing tool. Background Art

[0002] In the related technology, automotive hoses are mostly made of a combination of hoses and quick-connect connectors to achieve low or no leakage in the pipeline, easy installation and use, lightweight and reduced vehicle cost. The pull-out force of the hose and connector is of great significance for evaluating the hose connection effect. The existing pull-out force test tooling uses a mandrel that matches the quick-connect connector for testing. The test process cannot ensure that the upper and lower clamping positions are aligned. There may be radial stress at the joint position, which affects the test data. During the test, the mandrel needs to be repeatedly inserted and pulled out and the sample needs to be aligned. The mandrel needs to be customized according to different pipe diameters and different connection methods. The test process is cumbersome, the test efficiency is low, and the test cost is high. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a pull-out force test tool with simple structure, strong versatility, simple test process, low test cost, high test efficiency and high test data accuracy.

[0004] According to the pull-out force testing tool of the embodiment of the utility model, it includes: a tool body and a clamping part, the tool body is suitable for being fixedly connected to a tensile testing machine, the clamping part is fixedly connected to the tool body, the clamping part and the tool body are opposite and spaced apart to form an assembly space between the clamping part and the tool body, the clamping part defines a clamping notch connected to the assembly space, the clamping notch has opposite inner ends and an open end, and the width dimension of the clamping notch gradually increases from the inner end to the open end.

[0005] According to the pull-out force testing tooling of the embodiment of the present application, it includes a tooling body and a clamping part, the tooling body is suitable for being fixedly connected to a tensile testing machine, the clamping part is fixedly connected to the tooling body, the clamping part and the tooling body are relative and spaced apart to form an assembly space between the clamping part and the tooling body, the assembly space is used to assemble the joint, the hose pull-out force test uses two pull-out force testing tools to cooperate with each other to complete the test, the two pull-out force testing tools are fixedly connected to the tensile testing machine, the pull-out force testing tooling has a simple structure, strong versatility, simple testing process, low testing cost, high testing efficiency, and high test data accuracy.

[0006] According to some embodiments of the present invention, the clamping portion includes: a first clamping arm and a second clamping arm, the first clamping arm and the second clamping arm are opposite to and spaced apart from each other, so as to form the clamping gap between the first clamping arm and the second clamping arm.

[0007] According to some embodiments of the present utility model, the pull-out force testing tool further includes: a connecting arm, and the clamping portion is fixedly connected to the tool body through the connecting arm.

[0008] According to some embodiments of the utility model, along the arrangement direction of the clamping portion and the tooling body, the end surface of the clamping portion facing the tooling body is constructed as an inclined surface, and the spacing distance between the inclined surface and the tooling body gradually decreases from the inner end to the open end.

[0009] According to some embodiments of the present invention, the angle between the inclined surface and the direction perpendicular to the arrangement direction of the clamping portion and the tooling body is β, satisfying the relationship: 4°≤β≤6°.

[0010] According to some embodiments of the present invention, along the arrangement direction of the clamping portion and the tool body, a friction portion is formed on a portion of an end surface of the clamping portion facing the tool body, and the friction portion is adjacent to the open end.

[0011] According to some embodiments of the present invention, another portion of the end surface of the clamping portion facing the tool body is formed with a smooth surface.

[0012] According to some embodiments of the present utility model, the tool body is formed with a mounting hole, and the mounting hole is used for assembly with the tensile testing machine so that the tool body is fixedly connected to the tensile testing machine.

[0013] According to some embodiments of the utility model, the mounting hole includes: a first hole and a second hole, the axial direction of the first hole is parallel to the arrangement direction of the clamping portion and the tooling body, the axial direction of the second hole is perpendicular to the arrangement direction of the clamping portion and the tooling body, and the first hole and the second hole are connected.

[0014] According to some embodiments of the present invention, there are a plurality of second holes, and the plurality of second holes are arranged around the first hole along the circumference of the first hole.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is a front cross-sectional view of a pull-out force testing tool according to an embodiment of the present application;

[0018] Figure 2 is a side cross-sectional view of a pull-out force testing tool according to an embodiment of the present application;

[0019] Figure 3 yes Figure 1 Sectional view at AA in the figure;

[0020] Figure 4 yes Figure 3 A partial enlarged schematic diagram of area B in the middle.

[0021] Reference numerals:

[0022] Pull-out force test fixture 1,

[0023] Tool body 10, mounting hole 11, first hole 111, second hole 112,

[0024] Clamping portion 20, clamping notch 21, inner end 211, open end 212,

[0025] The first clamping arm 22, the second clamping arm 23, the friction portion 24, the inclined surface 25,

[0026] Assembly space 30 , connecting arm 40 , first plate body 41 . DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] Reference below Figure 1-Figure 4 A pull-out force testing tool 1 according to an embodiment of the present utility model is described.

[0029] According to the pull-out force testing tool 1 of the embodiment of the utility model, Figure 1 , Figure 2 As shown, the pull-out force test tool 1 may include: a tool body 10 and a clamping portion 20, the tool body 10 is suitable for being fixedly connected to the tensile machine, the clamping portion 20 is fixedly connected to the tool body 10, the clamping portion 20 and the tool body 10 are opposite and spaced apart to form an assembly space 30 between the clamping portion 20 and the tool body 10, and the clamping portion 20 defines a clamping notch 21 communicating with the assembly space 30, as shown in FIG. Figure 3 As shown, the clamping notch 21 has an inner end 211 and an open end 212 opposite to each other, and the width of the clamping notch 21 gradually increases from the inner end 211 to the open end 212 .

[0030] It should be noted that the existing pull-out force test tooling uses a mandrel that is clamped and matched with a quick-connect connector for testing. The test process cannot ensure that the upper and lower clamping positions are aligned, and radial stress may exist at the connector position, affecting the test data. During the test, the mandrel needs to be repeatedly inserted and pulled out and the sample needs to be aligned. The mandrel needs to be customized according to different pipe diameters and different connection methods. The test process is cumbersome, the test efficiency is low, and the test cost is high.

[0031] Based on this, the embodiment of the present application proposes a pull-out force testing jig 1, including a jig main body 10 and a clamping portion 20. The jig main body 10 is suitable for fixed connection with a tensile testing machine. The tensile testing machine may have a fixed end and a beam end. Both the fixed end and the beam end of the tensile testing machine may be fixedly provided with the jig main body 10. The jig main body 10 may be fixedly connected with the tensile testing machine by bolt connection, clamping connection, etc. The clamping portion 20 is opposite to and spaced apart from the jig main body 10. The clamping portion 20 and the jig main body 10 are fixedly connected. The pull-out force testing jig 1 may include a first plate 41. The first plate 41 is connected between the clamping portion 20 and the jig main body 10 to achieve a fixed connection between the clamping portion 20 and the jig main body 10. The clamping portion 20 may be fixedly connected to the first plate 41 by bolt connection, welding, etc. The jig main body 10 may be fixedly connected to the first plate 41 by bolt connection, welding, etc., thereby achieving a fixed connection between the clamping portion 20 and the jig main body 10. The clamping portion 20 is fixedly connected, or the clamping portion 20 has a connecting portion, which is fixedly connected to the tool body 10. The clamping portion 20 and the tool body 10 are arranged opposite to each other, and the clamping portion 20 and the tool body 10 are spaced apart to form an assembly space 30 between the clamping portion 20 and the tool body 10. The assembly space 30 is used to assemble the joint. The joint is formed with a boss structure, and the boss structure abuts against the clamping portion 20 to limit the joint, so that at least part of the joint is assembled in the assembly space 30, thereby realizing the assembly of the hose joint and the pull-out force test tool 1.

[0032] When performing a hose pull-out force test, the hose and the joint are connected, and the tensile machine pulls the pull-out force test fixture 1 to separate the hose and the joint, completing the hose pull-out force test. The clamping portion 20 defines a clamping notch 21 that is connected to the assembly space 30, and the joint and the clamping portion 20 are in contact. The hose is inserted into the clamping notch 21, and the joint and the clamping portion 20 can be slidably connected, so that the clamping portion 20 does not generate radial stress on the joint. It should be noted that when the pull-out force test fixture 1 is as Figure 1 When placed, the radial direction is perpendicular to Figure 1 The clamping notch 21 has an inner end 211 and an open end 212 opposite to each other. Figure 2 and Figure 3As shown, one end of the clamping notch 21 close to the connection between the clamping portion 20 and the first plate body 41 is an inner end 211, and one end of the clamping notch 21 away from the connection between the clamping portion 20 and the first plate body 41 is an open end 212. From the inner end 211 to the open end 212, the width of the clamping notch 21 gradually increases. The cross-section of the clamping notch 21 can be a trapezoid or a trapezoid-like shape. The clamping notch 21 can be adapted to hoses of different sizes, so that the pull-out force test fixture 1 can test hose connectors of different sizes.

[0033] In the embodiment of the present application, when performing the pull-out force test of the hose and the joint, two pull-out force test fixtures 1 are used, and the two pull-out force test fixtures 1 are fixedly connected to the tensile machine, one of the pull-out force test fixtures 1 is connected to the fixed end of the tensile machine, and the other pull-out force test fixture 1 is connected to the crossbeam end of the tensile machine. The position of the crossbeam end of the tensile machine is adjusted, and a hose with a joint to be tested is selected. The hose can be made of nylon, rubber or other materials, and the joints at both ends of the hose are respectively assembled in the assembly space 30 of the two pull-out force test fixtures 1. At least part of the connector is assembled in the assembly space 30, and the flexible hose is moved to keep it in a natural hanging state. The hose passes through the clamping notch 21, and the peripheral wall of the hose contacts the inner wall of the clamping notch 21. Then the tensile machine is started to start the pull-out force test. After the pull-out force test is completed, it is only necessary to reset the tensile machine, remove the hose and the pulled-out connector, and install a new hose to be tested to start a new round of hose pull-out force test. The pull-out force test fixture 1 of the present application has a simple structure, a simple test process, high test efficiency, low test cost, and high test data accuracy. In addition, since the width of the clamping notch 21 gradually increases from the inner end 211 to the open end 212, the clamping notch 21 can be adapted to hoses of different sizes, which can improve the versatility of the pull-out force test fixture 1.

[0034] In some embodiments of the present invention, Figure 3 As shown, the clamping portion 20 may include: a first clamping arm 22 and a second clamping arm 23 , the first clamping arm 22 and the second clamping arm 23 are opposite to and spaced apart from each other, so as to form a clamping gap 21 between the first clamping arm 22 and the second clamping arm 23 .

[0035] like Figure 3 As shown, the clamping portion 20 may include a first clamping arm 22 and a second clamping arm 23, the first clamping arm 22 and the second clamping arm 23 are opposite and spaced apart, and along the direction from the inner end 211 to the open end 212 of the clamping notch 21, the width of the first clamping arm 22 and the width of the second clamping arm 23 gradually decrease, and the spacing distance between the first clamping arm 22 and the second clamping arm 23 gradually increases, thereby forming a clamping notch 21 between the first clamping arm 22 and the second clamping arm 23, and the cross-section of the clamping notch 21 may be a trapezoid or a trapezoid-like shape.

[0036] In some embodiments of the present invention, Figure 1 , 2 As shown, the pull-out force testing tool 1 may further include: a connecting arm 40 , through which the clamping portion 20 is fixedly connected to the tool body 10 .

[0037] The extraction force test fixture 1 may further include a connecting arm 40, which is used to connect the clamping part 20 and the fixture body 10. In the embodiment of the present application, the first plate body 41 is configured as the connecting arm 40 as an example for explanation. The clamping part 20 is fixedly connected to the fixture body 10 through the connecting arm 40. The clamping part 20 can be fixedly connected to the connecting arm 40 by bolt connection, welding, etc. The fixture body 10 can be fixedly connected to the connecting arm 40 by bolt connection, welding, etc., but the utility model is not limited thereto. The connecting arm 40, the clamping part 20 and the fixture body 10 are integrally formed. Thus, the clamping part 20 and the fixture body 10 are fixedly connected, so that the clamping part 20 and the fixture body 10 are opposite and spaced apart, thereby realizing the arrangement of the assembly space 30.

[0038] In some embodiments of the present invention, Figure 2 As shown, along the arrangement direction of the clamping portion 20 and the tooling body 10, the end surface of the clamping portion 20 facing the tooling body 10 is constructed as an inclined surface 25, and the spacing distance between the inclined surface 25 and the tooling body 10 gradually decreases from the inner end 211 to the open end 212.

[0039] Along the arrangement direction of the clamping portion 20 and the tool body 10, that is, Figure 1 In the Y direction of the clamping part 20, the end surface facing the tool body 10 is configured as an inclined surface 25, and the boss structure of the joint abuts against the inclined surface 25 of the clamping part 20 facing the tool body 10, which plays a role in limiting the joint, so that at least part of the joint is limited in the assembly space 30, and the joint is prevented from moving out of the assembly space 30 during the test. Along the direction from the inner end 211 of the clamping part 20 to the open end 212, the spacing distance between the inclined surface 25 and the tool body 10 gradually decreases, so that the end surface of the clamping part 20 facing the tool body 10 is configured as the inclined surface 25.

[0040] In some embodiments of the present invention, the angle between the inclined surface 25 and the direction perpendicular to the arrangement direction of the clamping portion 20 and the tool body 10 is β, which satisfies the relationship: 4°≤β≤6°.

[0041] like Figure 2As shown, from the inner end 211 of the clamping portion 20 to the open end 212, the spacing distance between the inclined surface 25 and the tooling body 10 gradually decreases, and an angle is formed between the inclined surface 25 and the direction perpendicular to the arrangement direction of the clamping portion 20 and the tooling body 10. Exemplarily, the angle between the inclined surface 25 and the direction perpendicular to the arrangement direction of the clamping portion 20 and the tooling body 10 can be 4°, 4.6°, 5°, 5.2°, 5.8°, 6°, etc. The angle between the inclined surface 25 and the direction perpendicular to the arrangement direction of the clamping portion 20 and the tooling body 10 can be in the range of 4° to 6°. Any value, including the endpoint value, is the optional angle between the inclined surface 25 and the direction perpendicular to the arrangement direction of the clamping portion 20 and the tooling body 10 of the utility model. If the angle between the inclined surface 25 and the direction perpendicular to the arrangement direction of the clamping part 20 and the tool body 10 is less than 4°, the hose may slip off the pull-out force test tool 1 during the test, affecting the test efficiency and test safety; if the angle between the inclined surface 25 and the direction perpendicular to the arrangement direction of the clamping part 20 and the tool body 10 is greater than 6°, the inclined surface 25 may generate radial stress on the joint, affecting the test results and reducing the accuracy of the test data. When the angle between the inclined surface 25 and the direction perpendicular to the arrangement direction of the clamping part 20 and the tool body 10 is between 4° and 6°, the joint will not slip off the pull-out force test tool 1, and the joint and the inclined surface 25 are in contact, but the inclined surface 25 will not generate radial stress on the joint, reducing the risk of the joint slipping off the pull-out force test tool 1 and improving the accuracy of the test data.

[0042] In some embodiments of the utility model, along the arrangement direction of the clamping portion 20 and the tool body 10, a friction portion 24 is formed on the end surface of the clamping portion 20 facing the tool body 10, and the friction portion 24 is adjacent to the open end 212. The friction portion 24 can be formed by knurling or sandblasting the end surface, or by coating the end surface with metal coating, etc. The friction portion 24 is arranged adjacent to the open end 212, and the joint is installed in the assembly space 30 and abuts against the end surface of the clamping portion 20 facing the tool body 10. After the joint contacts the friction portion 24, the friction force between the joint and the clamping portion 20 can be increased, thereby reducing the risk of the joint slipping off the pull-out force test tool 1, thereby improving the test efficiency and test safety.

[0043] In some embodiments of the present invention, another portion of the end surface of the clamping portion 20 facing the tool body 10 is formed with a smooth surface.

[0044] A friction portion 24 is formed on a portion of the end surface of the clamping portion 20 facing the tooling body 10, and the friction portion 24 is adjacent to the open end 212. A smooth surface is formed on another portion of the end surface of the clamping portion 20 facing the tooling body 10. The smooth surface can be formed by polishing the end surface of the clamping portion 20 facing the tooling body 10. A portion of the end surface of the clamping portion 20 facing the tooling body 10 forms a smooth surface. The joint is installed in the assembly space 30 and abuts against the end surface of the clamping portion 20 facing the tooling body 10. When the joint abuts against the smooth surface, the clamping portion 20 will not generate radial stress on the joint, so that the test data is more accurate.

[0045] In some embodiments of the present invention, Figure 1 , Figure 2 As shown, the tool body 10 is formed with a mounting hole 11, and the mounting hole 11 is used for assembly with the tensile testing machine so that the tool body 10 is fixedly connected to the tensile testing machine. The mounting hole 11 can be a threaded hole or a through hole, and the mounting hole 11 can be fixedly connected to the tensile testing machine by bolt connection, mounting shaft and mounting pin connection, etc. The tool body 10 is fixedly connected to the tensile testing machine, so that the pull-out force test tool 1 can be fixed on the tensile testing machine to realize the pull-out force test of the hose.

[0046] In some embodiments of the present invention, Figure 1 , Figure 2 As shown, the mounting hole 11 may include: a first hole 111 and a second hole 112, the axial direction of the first hole 111 is parallel to the arrangement direction of the clamping portion 20 and the tooling body 10, the axial direction of the second hole 112 is perpendicular to the arrangement direction of the clamping portion 20 and the tooling body 10, and the first hole 111 and the second hole 112 are connected.

[0047] The mounting hole 11 may include a first hole 111 and a second hole 112. In the embodiment of the present application, the present application takes the mounting hole 11 and the tensile machine as an example to achieve fixed connection through the mounting shaft and the mounting pin. The axial direction of the first hole 111 is parallel to the arrangement direction of the clamping part 20 and the tooling body 10. The first hole 111 can cooperate with the mounting shaft on the tensile machine. The axial direction of the second hole 112 is perpendicular to the arrangement direction of the clamping part 20 and the tooling body 10. The first hole 111 and the second hole 112 are connected. The second hole 112 can be assembled with the mounting pin. The mounting pin is penetrated through the second hole 112 and cooperates with the mounting shaft in the first hole 111 to fix the mounting shaft on the tensile machine in the first hole 111, realize the fixed connection between the tooling body 10 and the tensile machine, and improve the safety of the test.

[0048] In some embodiments of the present invention, there are a plurality of second holes 112 , and the plurality of second holes 112 are arranged around the first hole 111 along the circumference of the first hole 111 .

[0049] In the application embodiment itself, the second hole 112 is connected to the first hole 111, the mounting pin is passed through the second hole 112, and the mounting pin cooperates with the mounting shaft in the first hole 111, the mounting pin cooperates with the mounting shaft on the tensile machine in the first hole 111 to realize the fixed connection between the tooling body 10 and the tensile machine, and the second hole 112 can be multiple, and the multiple second holes 112 are arranged around the first hole 111 along the circumference of the first hole 111, and each second hole 112 is provided with a mounting pin. By simultaneously assembling the multiple mounting pins with the mounting shaft, the tightness of the connection between the tooling body 10 and the tensile machine is increased, and the safety of the test is improved.

[0050] Other structures and operations of the pull-out force testing tool 1 according to the embodiment of the utility model are known to ordinary technicians in the field and will not be described in detail here.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A pull-out force test tool (1), characterized in that: include: A tool body (10), wherein the tool body (10) is suitable for being fixedly connected to a tensile testing machine; A clamping portion (20), the clamping portion (20) being fixedly connected to the tooling body (10), the clamping portion (20) and the tooling body (10) being opposite to each other and spaced apart so as to form an assembly space (30) between the clamping portion (20) and the tooling body (10), the clamping portion (20) defining a clamping notch (21) communicating with the assembly space (30), the clamping notch (21) having opposite inner ends (211) and an open end (212), and the width of the clamping notch (21) gradually increasing from the inner end (211) to the open end (212).

2. The pull-out force testing tool (1) according to claim 1, characterized in that: The clamping portion (20) comprises a first clamping arm (22) and a second clamping arm (23), wherein the first clamping arm (22) and the second clamping arm (23) are opposite to each other and spaced apart so as to form the clamping gap (21) between the first clamping arm (22) and the second clamping arm (23).

3. The pull-out force testing tool (1) according to claim 1, characterized in that: Also includes: A connecting arm (40), wherein the clamping portion (20) is fixedly connected to the tooling body (10) via the connecting arm (40).

4. The pull-out force testing tool (1) according to claim 1, characterized in that: Along the arrangement direction of the clamping portion (20) and the tooling body (10), the end surface of the clamping portion (20) facing the tooling body (10) is constructed as an inclined surface (25), and the spacing distance between the inclined surface (25) and the tooling body (10) gradually decreases from the inner end (211) to the open end (212).

5. The pull-out force testing tool (1) according to claim 4, characterized in that: The angle β between the inclined surface (25) and the direction perpendicular to the arrangement direction of the clamping portion (20) and the tooling body (10) is satisfied, and the relationship: 4°≤β≤6°.

6. The pull-out force testing tool (1) according to any one of claims 1 to 5, characterized in that: Along the arrangement direction of the clamping portion (20) and the tooling body (10), a friction portion (24) is formed on the end surface of the clamping portion (20) facing the tooling body (10), and the friction portion (24) is adjacent to the open end (212).

7. The pull-out force testing tool (1) according to claim 6, characterized in that: Another part of the end surface of the clamping portion (20) facing the tool body (10) is formed with a smooth surface.

8. The pull-out force testing tool (1) according to any one of claims 1 to 5, characterized in that: The tool body (10) is formed with a mounting hole (11), and the mounting hole (11) is used for assembly with the tensile testing machine so that the tool body (10) is fixedly connected to the tensile testing machine.

9. The pull-out force testing tool (1) according to claim 8, characterized in that: The mounting hole (11) comprises: a first hole (111) and a second hole (112); the axial direction of the first hole (111) is parallel to the arrangement direction of the clamping portion (20) and the tooling body (10); the axial direction of the second hole (112) is perpendicular to the arrangement direction of the clamping portion (20) and the tooling body (10); and the first hole (111) and the second hole (112) are connected.

10. The pull-out force testing tool (1) according to claim 9, characterized in that: There are a plurality of second holes (112), and the plurality of second holes (112) are arranged around the first hole (111) along the circumference of the first hole (111).

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