A wire harness bending performance testing fixture

Abstract

This utility model relates to the field of wire harness manufacturing, and in particular to a wire harness bending performance testing fixture, including a frame, a wire harness, and a clamping mechanism. The frame is arranged front and rear, with a bending mechanism located on the front side of the frame. The bending mechanism performs repeated bending tests on the wire harness. The clamping mechanism includes two clamping components, arranged vertically and located at opposite ends of the wire harness. Each clamping component includes two cylindrical clamping rollers. One end of the wire harness to be tested is placed between the two upper clamping rollers. An inflation / deflation module inflates the two upper air bladders, allowing them to flexibly clamp the wire harness. The cylindrical clamping rollers and the annular air bladders prevent localized wear on the wire harness caused by plate-shaped edges. The inflation degree of the air bladders can be adjusted to clamp wire harnesses of different diameters. Several protrusions increase the friction between the air bladders and the wire harness, improving the clamping effect and enhancing the accuracy of the test results.

Description

Technical Field

[0001] This utility model relates to the field of wire harness manufacturing, and in particular to a wire harness bending performance testing fixture. Background Technology

[0002] According to the patent document with publication number CN222166726U, the wire harness is inserted into the inner cavity of the housing, so that the wire harness is located between the extrusion clamp and the fixing clamp. By pushing the extrusion pin, the anti-detachment block passes through the opening, and then the sliding plate compresses the spring, so that the spring pushes the extrusion clamp, making the extrusion clamp stably press against the surface of the wire harness. By rotating the extrusion pin 90 degrees, the elasticity of the spring makes the anti-detachment block engage in the inner cavity of the limiting groove, so that the extrusion pin is stably located in the inner cavity of the fixing tube, thus completing the limiting clamping of the wire harness.

[0003] The patent document states that during the repeated bending of the wire harness, the edges of the compression clamp and the fixing clamp may cause wear or damage to the wire harness, affecting the accuracy of the test results, or even causing the wire harness to fail prematurely during the test, making it impossible to accurately assess its actual service life. Utility Model Content

[0004] The purpose of this invention is to provide a wire harness bending performance testing fixture to solve the above-mentioned problems.

[0005] This utility model achieves the above objectives through the following technical solutions:

[0006] A wire harness bending performance testing fixture includes a frame, a wire harness, and a clamping mechanism.

[0007] The rack is set up at the front and back, with a bending mechanism on the front side of the rack. The bending mechanism is used to repeatedly bend the wire harness for testing.

[0008] The clamping mechanism includes two clamping components, which are arranged one above the other and located at both ends of the wire harness. Each clamping component includes two clamping rollers, which are cylindrical. An air bladder is fixed on the outer wall of the clamping roller. The air bladder is annular and has several protrusions fixed on its outer surface. An inflation / deflation module is provided on one side of the air bladder. When clamping the wire harness, the air bladder is inflated through the inflation / deflation module. After the test, the air bladder is deflated through the inflation / deflation module.

[0009] Preferably, the inflation / deflation module includes an inlet check valve, an exhaust check valve, and an air pump. The inlet check valve and the exhaust check valve are both fixed on one side of the airbag, and an air supply pipe is fixed between the air pump and the inlet check valve.

[0010] Preferably, the bending mechanism includes a first bending disc and a second bending disc, both of which are rotatably connected to the front side of the frame. A swing arm is provided between the first bending disc and the second bending disc, and the swing arm is rotatably connected to the frame. A motor is fixed at the input end of the swing arm.

[0011] Preferably, the bending mechanism further includes two guide rollers and a counterweight frame. The two guide rollers are located below the swing arm and are fixedly connected to the frame. The counterweight frame is located below the guide rollers and is slidably connected to the front of the frame.

[0012] Preferred option: The protrusions are made of rubber.

[0013] Preferably, the two clamping rollers on the upper side are fixed to the front side of one end of the swing arm, the two clamping rollers on the upper side are vertically distributed, and the air pump on the upper side is fixed to the rear side of one end of the swing arm.

[0014] Preferably, the two clamping rollers on the lower side are fixed to the top rear side of the counterweight frame, the two clamping rollers on the lower side are horizontally distributed, and the air pump on the lower side is fixed to the top front side of the counterweight frame.

[0015] The beneficial effects compared with existing technologies are as follows: One end of the wire harness to be tested is placed between the two clamping rollers on the upper side. The two airbags on the upper side are inflated by the inflation and deflation module, so that the two airbags flexibly clamp the wire harness. The cylindrical clamping rollers and the annular airbags avoid local wear on the wire harness caused by the plate-shaped edges. The inflation degree of the airbags can be adjusted to clamp wire harnesses of different diameters. Several protrusions increase the friction between the airbags and the wire harness, improve the clamping effect, and enhance the accuracy of the test results. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a wire harness bending performance testing fixture according to the present invention;

[0018] Figure 2 This is a side view of a wire harness bending performance testing fixture according to the present invention;

[0019] Figure 3 yes Figure 1 A magnified view of a section at point A in the middle;

[0020] Figure 4 yes Figure 1A magnified view of a section at point B in the middle;

[0021] Figure 5 This is a schematic diagram of the air bladder and protrusion structure of the wire harness bending performance testing fixture described in this utility model.

[0022] The annotations in the attached figures are explained as follows:

[0023] 1. Frame; 201. First bending disc; 202. Second bending disc; 203. Swing arm; 204. Motor; 205. Counterweight frame; 206. Guide roller; 3. Wire harness; 401. Clamping roller; 402. Airbag; 403. Protrusion; 404. Inlet check valve; 405. Exhaust check valve; 406. Air pump; 407. Air supply pipe. Detailed Implementation

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. All electrical components mentioned in this document are electrically connected to an external main controller and 220V AC mains power, and the main controller can be a conventionally known device such as a computer that provides control.

[0025] The present invention will be further described below with reference to the accompanying drawings:

[0026] like Figures 1-5 As shown, a wire harness bending performance testing fixture includes a frame 1, a wire harness 3, and a clamping mechanism.

[0027] The frame 1 is arranged front and rear. A bending mechanism is provided on the front side of the frame 1. The bending mechanism is used to repeatedly bend the wire harness 3. The bending mechanism includes a first bending disc 201 and a second bending disc 202. Both the first bending disc 201 and the second bending disc 202 are rotatably connected to the front side of the frame 1. A swing arm 203 is provided between the first bending disc 201 and the second bending disc 202. The swing arm 203 is rotatably connected to the frame 1. A motor 204 is fixed at the input end of the swing arm 203. The bending mechanism also includes two guide rollers. 206 and counterweight frame 205, two guide rollers 206 are located below the swing arm 203 and are fixedly connected to the frame 1. The counterweight frame 205 is located below the guide rollers 206 and is slidably connected to the front side of the frame 1. The motor 204 drives the swing arm 203 to swing back and forth with the same amplitude, so that the wire harness 3 is pulled and bent on the outer side wall of the first bending disc 201 and the second bending disc 202 in sequence. The wire harness 3 drives the counterweight frame 205 to move up and down in the vertical direction.

[0028] The clamping mechanism includes two clamping components, arranged vertically and located at opposite ends of the wire harness 3. Each clamping component includes two cylindrical clamping rollers 401. An air bladder 402, which is annular, is fixed to the outer wall of each clamping roller 401. Several protrusions 403, made of rubber, are fixed to the outer surface of the air bladder 402. The two upper clamping rollers 401 are fixed to the front of one end of the swing arm 203 and are vertically distributed. The two lower clamping rollers 401 are fixed to the rear of the top of the counterweight frame 205 and are horizontally distributed. One end of the wire harness 3 to be tested is placed into the two upper clamping rollers 401. Between them, the two airbags 402 on the upper side are inflated by the inflation and deflation module, so that the two airbags 402 flexibly clamp the wire harness 3. The cylindrical clamping roller 401 and the annular airbag 402 prevent the plate-shaped edges from causing local wear to the wire harness 3. The inflation degree of the airbag 402 can be adjusted to clamp wire harnesses 3 of different diameters. Several protrusions 403 increase the friction between the airbag 402 and the wire harness 3, improving the clamping effect. The other end of the wire harness 3 passes through the first bending disc 201 and the second bending disc 202 in sequence, and between the two guide rollers 206. Finally, the other end of the wire harness 3 is placed between the two clamping rollers 401 on the lower side. The above operation is repeated to clamp the other end of the wire harness 3.

[0029] An inflation / deflation module is provided on one side of the airbag 402. When the wire harness 3 is clamped, the airbag 402 is inflated through the inflation / deflation module. After the test, the airbag 402 is deflated through the inflation / deflation module. The inflation / deflation module includes an intake one-way valve 404, an exhaust one-way valve 405, and an air pump 406. The intake one-way valve 404 and the exhaust one-way valve 405 are both fixed on one side of the airbag 402. An air supply pipe 407 is fixed between the air pump 406 and the intake one-way valve 404. The upper air pump 406 is fixed to the rear side of one end of the swing arm 203, and the lower air pump 406 is fixed to the top front side of the counterweight frame 205. When the wire harness 3 is clamped, the air is input into the airbag 402 through the air supply pipe 407 and the intake one-way valve 404 by the air pump 406. After the test, the air in the airbag 402 is released by opening the exhaust one-way valve 405.

[0030] Working principle: One end of the wire harness 3 to be tested is placed between the two upper clamping rollers 401. Air is pumped into the airbag 402 through the air supply pipe 407 and the air inlet one-way valve 404 by the air pump 406 to inflate the airbag. The two airbags 402 flexibly clamp the wire harness 3. The cylindrical clamping rollers 401 and the annular airbags 402 prevent the plate edges from causing local wear to the wire harness 3. The inflation degree of the airbags 402 can be adjusted to clamp wire harnesses 3 of different diameters. Several protrusions 403 increase the friction between the airbags 402 and the wire harness 3 to improve the clamping effect. The other end of the wire harness 3 passes through the first bending plate 201 and the second bending plate 202 in sequence, and between the two guide rollers 206. Finally, the other end of the wire harness 3 is placed between the two lower clamping rollers 401. The above operation is repeated to clamp the other end of the wire harness 3.

[0031] After clamping, the motor 204 drives the swing arm 203 to swing back and forth with a consistent amplitude, so that the wire harness 3 is pulled and bent on the outer walls of the first bending plate 201 and the second bending plate 202 in sequence. The wire harness 3 drives the counterweight frame 205 to move up and down in the vertical direction. After the test is completed, the air in the airbag 402 is released by opening the exhaust one-way valve 405. The wire harness 3 can then be removed for the next test.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A wire harness bending performance testing fixture, characterized in that: Includes a frame (1), a wiring harness (3), and a clamping mechanism; The frame (1) is arranged at the front and back, and a bending mechanism is provided on the front side of the frame (1). The wire harness (3) is repeatedly bent through the bending mechanism. The clamping mechanism includes two clamping components, which are arranged vertically and located at both ends of the wire harness (3). Each clamping component includes two clamping rollers (401), which are cylindrical. An airbag (402) is fixed on the outer wall of the clamping roller (401). The airbag (402) is annular and has several protrusions (403) fixed on its outer surface. An inflation / deflation module is provided on one side of the airbag (402). When the wire harness (3) is clamped, the airbag (402) is inflated through the inflation / deflation module. After the test, the airbag (402) is deflated through the inflation / deflation module.

2. The wire harness bending performance testing fixture according to claim 1, characterized in that: The inflation / deflation module includes an inlet check valve (404), an exhaust check valve (405), and an air pump (406). The inlet check valve (404) and the exhaust check valve (405) are both fixed to one side of the airbag (402). An air supply pipe (407) is fixed between the air pump (406) and the inlet check valve (404).

3. The wire harness bending performance testing fixture according to claim 2, characterized in that: The bending mechanism includes a first bending disc (201) and a second bending disc (202). The first bending disc (201) and the second bending disc (202) are rotatably connected to the front side of the frame (1). A swing arm (203) is provided between the first bending disc (201) and the second bending disc (202). The swing arm (203) is rotatably connected to the frame (1). A motor (204) is fixed at the input end of the swing arm (203).

4. A wire harness bending performance testing fixture according to claim 3, characterized in that: The bending mechanism also includes two guide rollers (206) and a counterweight frame (205). The two guide rollers (206) are located on the lower side of the swing arm (203) and are fixedly connected to the frame (1). The counterweight frame (205) is located on the lower side of the guide rollers (206) and is slidably connected to the front side of the frame (1).

5. A wire harness bending performance testing fixture according to claim 1, characterized in that: The protrusion (403) is made of rubber.

6. A wire harness bending performance testing fixture according to claim 4, characterized in that: The two clamping rollers (401) on the upper side are fixed to the front side of one end of the swing arm (203), the two clamping rollers (401) on the upper side are vertically distributed, and the air pump (406) on the upper side is fixed to the rear side of one end of the swing arm (203).

7. A wire harness bending performance testing fixture according to claim 4, characterized in that: The two clamping rollers (401) on the lower side are fixed to the top rear side of the counterweight frame (205), the two clamping rollers (401) on the lower side are horizontally distributed, and the air pump (406) on the lower side is fixed to the top front side of the counterweight frame (205).

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