Wire harness abrasion resistance testing device

Abstract

The application discloses a wire harness abrasion resistance testing device, which comprises a friction mechanism, an electric linear driving mechanism, a chuck, a support plate and a controller. The chuck comprises a support, a static clamping strip, a dynamic clamping strip, a manual linear driving mechanism, a support rod, a guide wheel, a wheel seat and a connecting frame. The dynamic clamping strip is oppositely arranged with the static clamping strip and forms a clamping opening together. The dynamic clamping strip is driven by the manual linear driving mechanism to move close to or away from the dynamic clamping strip. The wheel seat is fixed with the static clamping strip through the connecting frame. The guide wheel is rotatably connected to the wheel seat and located obliquely above the clamping opening. The friction mechanism comprises a core column, a sleeve and a fan. The bottom end of the core column is fixed with the electric linear driving mechanism mounted on the support plate and is driven to move back and forth along the length direction of the wire harness to be detected. The top end of the core column is provided with an expansion part. The core column is provided with an air duct passing through the expansion part. The fan can inject air into the air duct through the air inlet. The device has good heat dissipation and good clamping stability.

Description

[0001] The present application relates to the technical field of wiring harnesses, in particular to the technical field of wiring harness abrasion resistance testing devices.

[0002] Wiring harnesses are the nerve transmission system of engines, and their role is to transmit or exchange power supply or data signals of electrical systems. With the increasing requirements for engine power, economy and emission, engine electronic control systems have become increasingly complex, and the complexity of wiring harnesses has also increased. Wiring harnesses are prone to friction during operation, which can cause failure or even breakage. Therefore, they usually need to be tested for abrasion resistance according to different levels before leaving the factory.

[0003] The existing wiring harness abrasion resistance testing device, such as the automobile high-voltage wiring harness abrasion resistance testing device with publication (announcement) number CN210665250U, needs to connect the first and last ends of the wiring harness 12, then wrap them around the first and second winding rollers 4 and 11, and then use the rotating motor 3 to drive the first winding roller 4 to rotate, thereby driving the wiring harness 12 to rotate, and finally causing friction between the wiring harness 12 and the friction block 15 to achieve abrasion resistance testing. However, since the friction caused by vibration and other factors during actual use is not long-lasting, long-term friction between the wiring harness 12 and the friction block 15 can easily generate heat, causing the softness of the wiring harness 12 and the friction block 15 to change, thereby affecting the accuracy of the abrasion resistance test. Moreover, the design of the wiring harness 12 moving while the friction block 15 remains stationary causes the wiring harness 12 to also constantly rub against the first and second winding rollers 4 and 11, further affecting the accuracy of the abrasion resistance test. The automobile high-voltage wiring harness abrasion resistance testing device with publication (announcement) number CN212459271U also has the above-mentioned problems. Therefore, a clamp is used to make the wiring harness 12 stationary, and a driving mechanism is used to move the friction block 15. The wiring harness cutting device for wiring harness processing with publication (announcement) number CN216801511U has an L-shaped clamping 33 that can clamp the end of the wiring harness. However, if the clamping force is small, the wiring harness may come loose during friction, and if the clamping force is large, the surface skin of the wiring harness may be deformed, thereby affecting the protection of the wiring harness.

[0004] The purpose of the present application is to solve the problems in the prior art and to provide a wiring harness abrasion resistance testing device that can greatly improve the heat dissipation effect, thereby effectively avoiding the problem of decreased test accuracy caused by friction between the sheath and the wiring harness. The method of bending first and then clamping can enhance the clamping stability and prevent damage to the skin of the wiring harness.

[0005] ​​​In order to achieve the above object, the present application provides a wire harness abrasion resistance testing device, which comprises a friction mechanism, an electric linear driving mechanism, clamping heads, a support plate and a controller, two groups of the clamping heads are oppositely arranged above the support plate, the clamping head comprises a support, a static clamping strip, a dynamic clamping strip, a manual linear driving mechanism, a support rod, a guide wheel, a wheel seat and a connecting frame, the support is installed on the support plate through the support rod, the static clamping strip is fixed on the top surface of the support, the dynamic clamping strip is oppositely arranged with the static clamping strip and forms a clamping opening together, the dynamic clamping strip is driven by the manual linear driving mechanism to move close to or away from the dynamic clamping strip so as to make the clamping opening shrink or expand, the wheel seat is fixed with the static clamping strip through the connecting frame, the guide wheel is rotatably connected on the wheel seat and located obliquely above the clamping opening, the friction mechanism comprises a core column, a sleeve and a fan, the bottom end of the core column is fixed with the electric linear driving mechanism installed on the support plate and is driven to move back and forth along the length direction of the wire harness to be detected, and the top end is provided with an expansion part, the sleeve is wrapped outside the expansion part and tightly contacts with the wire harness to be detected, the core column is provided with an air duct passing through the expansion part, the outer wall of the core column is respectively provided with an air inlet and an air outlet which are communicated with the air duct and the outside, the fan can inject air into the air duct along the air inlet, and the controller is electrically connected with the friction mechanism and the electric linear driving mechanism respectively.

[0006] As a preferred, the friction mechanism further comprises a sleeve ring and a positioning bolt, the sleeve ring is threadedly connected outside the column body of the core column, one end of the sleeve ring towards the expansion part is provided with an extension ring part, the extension ring part is provided with a plurality of cutting grooves, each cutting groove separates the extension ring part into a plurality of movable pieces, the expansion part, the sleeve and each movable piece are respectively provided with a threaded hole, a sleeve body through hole and a piece body through hole, and the positioning bolt can pass through the piece body through hole, the sleeve body through hole and the threaded hole in sequence to connect the expansion part, the sleeve and each movable piece from inside to outside.

[0007] As a preferred, the friction mechanism further comprises a vertical telescopic rod, the upper and lower ends of the vertical telescopic rod are respectively fixed with the core column and the electric linear driving mechanism.

[0008] As a preferred, the electric linear driving mechanism comprises a motor, an electric drive screw rod, an electric drive nut, an electric drive sliding block and an electric drive track, the electric drive nut is located in the motor and is driven to rotate by the motor, the electric drive screw rod horizontally penetrates the motor and is threadedly connected with the electric drive nut, the electric drive sliding block is fixed on one end of the electric drive screw rod and is slidably connected with the electric drive track, the electric drive track is horizontally arranged on the top surface of the support plate, and the friction mechanism is installed on the electric drive sliding block.

[0009] As preferred, the manual linear drive mechanism comprises a handle, a hand drive screw rod, a hand drive sliding block, a hand drive rail and a hand drive nut, the support is provided with a protrusion opposite to the static clamping strip, the hand drive screw rod is horizontally arranged and rotatably connected between the static clamping strip and the protrusion, one end of the hand drive screw rod penetrates through the protrusion and is fixed with the handle, the hand drive nut is threadedly connected outside the hand drive screw rod, the hand drive sliding block is fixed with the hand drive nut and slidably connected with the hand drive rail, the hand drive rail is horizontally arranged on the top surface of the support, and the dynamic clamping strip is mounted on the hand drive sliding block.

[0010] As preferred, the guide wheels of the two groups of clamping heads are oppositely arranged.

[0011] The beneficial effects of the present application are as follows:

[0012] 1) By arranging the support, the static clamping strip, the dynamic clamping strip, the manual linear drive mechanism, the supporting rod, the guide wheel, the wheel seat and the connecting frame, the clamping head is formed, the end portion of the wire harness is first bent downward by the guide wheel, and then the static clamping strip and the dynamic clamping strip are used to clamp the connector of the wire harness, so that the clamping stability is enhanced and the damage to the skin layer of the wire harness is avoided.

[0013] 2) By arranging the core column with the expansion part and the air duct, the expansion part covered with the skin is driven by the electric linear drive mechanism to continuously rub against the wire harness, the air duct passes through the expansion part, and the fan continuously sends cold air into the air duct, so that the heat dissipation effect is greatly improved, and the problem of reduced test accuracy caused by heat generated by the friction between the skin and the wire harness is effectively avoided.

[0014] 3) By threadedly connecting the sleeve ring outside the column body of the core column, arranging a plurality of movable pieces on one end of the sleeve ring towards the expansion part, and arranging screw holes, skin body through holes and piece body through holes on the expansion part, the skin and the movable pieces, respectively, the expansion part and the skin are connected by the positioning bolt when the positioning bolt is screwed in, and the movable pieces are pressed against the skin, so that the skin is tightly attached to the expansion part, and the skin is prevented from being pulled and deformed due to friction.

[0015] 4) By arranging the handle, the hand drive screw rod, the hand drive sliding block, the hand drive rail and the hand drive nut to form the manual linear drive mechanism, the distance between the static clamping strip and the dynamic clamping strip can be accurately controlled by hand, and the sliding mode of the dynamic clamping strip is more smooth.

[0016] The features and advantages of the present application will be described in detail in conjunction with the embodiments and the accompanying drawings.

DRAWINGS

[0017] Figure 1 is the front view of the wire harness wear resistance test device of the present application;

[0018] Figure 2 is the assembly diagram of the friction mechanism and the electric linear drive mechanism of the wiring harness abrasion resistance test device of the present application;

[0019] Figure 3 is the main view of the friction mechanism of the wiring harness abrasion resistance test device of the present application after removing the fan and the vertical telescopic rod;

[0020] Figure 4 is Figure 1 the enlarged view of A.

[0021] In the figure: 1-friction mechanism, 11-core column, 111-expansion part, 112-air duct, 12-sleeve, 13-sleeving ring, 131-extended ring part, 132-cut groove, 14-positioning bolt, 15-fan, 16-vertical telescopic rod, 2-electric linear drive mechanism, 21-motor, 22-electric drive screw rod, 23-electric drive sliding block, 24-electric drive track, 3-chuck, 31-support, 32-static clamping strip, 33-dynamic clamping strip, 34-manual linear drive mechanism, 341-handle, 342-hand drive screw rod, 343-hand drive sliding block, 344-hand drive track, 345-hand drive screw nut, 35-branch rod, 36-guide wheel, 361-annular wire groove, 37-wheel seat, 38-link frame, 4-branch plate, 5-wiring harness

DETAILED DESCRIPTION

[0022] Referring to Figures 1 to 4The present application wire harness abrasion resistance testing device, including friction mechanism 1, electric linear drive mechanism 2, chuck 3, support plate 4 and controller, two groups of chuck 3 are oppositely arranged above the support plate 4, chuck 3 includes support 31, static clamp strip 32, dynamic clamp strip 33, manual linear drive mechanism 34, support rod 35, guide wheel 36, wheel seat 37 and connecting frame 38, support 31 is installed on the support plate 4 by support rod 35, static clamp strip 32 is fixed on the top surface of support 31, dynamic clamp strip 33 is oppositely arranged with static clamp strip 32 and forms a clamping opening together, dynamic clamp strip 33 is driven by manual linear drive mechanism 34 to approach or away from dynamic clamp strip 33, so that the clamping opening is contracted or expanded, wheel seat 37 is fixed with static clamp strip 32 through connecting frame 38, guide wheel 36 is rotatably connected on wheel seat 37 and located obliquely above the clamping opening, friction mechanism 1 includes core column 11, sleeve 12 and fan 15, the bottom end of core column 11 is fixed with electric linear drive mechanism 2 installed on the support plate 4 and is driven to move back and forth along the length direction of the wire harness 5 to be detected, and the top end is provided with expansion part 111, sleeve 12 is covered outside expansion part 111 and closely contacts with the wire harness 5 to be detected, air duct 112 passing through expansion part 111 is arranged in core column 11, air inlet and air outlet communicating with air duct 112 and the outside are respectively arranged on the outer wall of core column 11, fan 15 can inject air into air duct 112 along air inlet, controller is electrically connected with friction mechanism 1 and electric linear drive mechanism 2 respectively.In use, the end of the wire harness can be first guided by guide wheel 36 to bend downward, and then static clamp strip 32 and dynamic clamp strip 33 are used to clamp the connector of the wire harness together, which has strong clamping stability and is not easy to damage the skin layer of the wire harness.In addition, during the test, fan 15 can continuously send cold air into air duct 112, which greatly improves the heat dissipation effect, so as to effectively avoid the problem of test accuracy decline caused by heat generated by the friction between sleeve 12 and wire harness 5.

[0023] The friction mechanism 1 further comprises a sleeve 13 and a positioning bolt 14, the sleeve 13 is threadedly connected outside the column body of the core column 11, the sleeve 13 is provided with an extension ring part 131 at one end of the expansion part 111, the extension ring part 131 is provided with a plurality of slits 132, each slit 132 separates the extension ring part 131 into a plurality of movable pieces, the expansion part 111, the sleeve 12 and each movable piece are respectively provided with a threaded hole, a skin body through hole and a piece body through hole, the positioning bolt 14 can pass through the piece body through hole, the skin body through hole and the threaded hole in sequence to connect the expansion part 111, the sleeve 12 and each movable piece from inside to outside. In this way, when the positioning bolt 14 is screwed in, on the one hand, the expansion part 111 and the sleeve 12 are directly connected by the positioning bolt 14, on the other hand, each movable piece is pressed against the sleeve 12, thereby making the sleeve 12 tightly adhere to the expansion part 111, avoiding the sleeve 12 being pulled and causing the skin body through hole to be deformed due to friction.

[0024] The friction mechanism 1 further comprises a vertical telescopic rod 16, the upper and lower ends of the vertical telescopic rod 16 are respectively fixed with the core column 11 and the electric linear drive mechanism 2. Among them, the added vertical telescopic rod 16 facilitates the user to adjust the height of the expansion part 111, so as to ensure that the sleeve 12 located outside can tightly adhere to the wire harness 5.

[0025] The electric linear drive mechanism 2 comprises a motor 21, an electric drive screw rod 22, an electric drive nut, an electric drive sliding block 23 and an electric drive rail 24, the electric drive nut is located in the motor 21 and is driven to rotate by the motor 21, the electric drive screw rod 22 horizontally penetrates the motor 21 and is threadedly connected with the electric drive nut, the electric drive sliding block 23 is fixed at one end of the electric drive screw rod 22 and is slidably connected with the electric drive rail 24, the electric drive rail 24 is horizontally arranged on the top surface of the support plate 4, and the friction mechanism 1 is installed on the electric drive sliding block 23.

[0026] The manual linear drive mechanism 34 comprises a handle 341, a hand drive screw rod 342, a hand drive sliding block 343, a hand drive rail 344 and a hand drive nut 345, the support 31 is provided with a protrusion opposite to the static clamping strip 32, the hand drive screw rod 342 is horizontally arranged and rotatably connected between the static clamping strip 32 and the protrusion, one end of the hand drive screw rod 342 penetrates the protrusion and is fixed with the handle 341, the hand drive nut 345 is threadedly connected outside the hand drive screw rod 342, the hand drive sliding block 343 is fixed with the hand drive nut 345 and slidably connected with the hand drive rail 344, the hand drive rail 344 is horizontally arranged on the top surface of the support 31, and the dynamic clamping strip 33 is installed on the hand drive sliding block 343. In this way, the distance between the static clamping strip 32 and the dynamic clamping strip 33 can be accurately controlled by hand shaking, and the sliding mode of the dynamic clamping strip 33 is more smooth.

[0027] The guide wheels 36 of the two sets of the chuck 3 are oppositely arranged, so that the normal rotation of the handle 341 is not affected by the guide wheels 36.

[0028] Working process of the present application:

[0029] Before testing: first, the wire harness 5 is bent by the guide wheels 36 until the connector of the wire harness 5 extends into the clamping opening. Then, the handle 341 is rotated, so that the hand drive nut 345 gradually approaches the static clamping strip 32 along the hand drive screw rod 342, thereby driving the hand drive sliding block 343 and the dynamic clamping strip 33 to gradually approach the static clamping strip 32, so that the clamping opening is contracted and the connector is stably clamped, and finally the wire harness 5 to be tested is horizontally fixed above the support plate 4. Then, the height of the expansion part 111 is adjusted by the vertical telescopic rod 16 until the sleeve skin 12 sleeved outside is tightly attached to the wire harness 5.

[0030] During testing: the motor 21 continuously drives the electric drive nut to rotate clockwise or counterclockwise, so that the electric drive screw rod 22 continuously moves left and right horizontally, and the electric drive sliding block 23 and the electric drive rail 24 drive the friction mechanism 1 to continuously move left and right horizontally, thereby performing friction test on the wire harness 5. At the same time, the fan 15 can continuously inject cold air into the air duct 112 along the air inlet and absorb the heat generated by friction, and then flow back to the atmosphere along the air outlet.

[0031] When the sleeve skin 12 needs to be replaced: first, unscrew the old positioning bolts 14, and then rotate the sleeve ring 13 until the movable pieces are no longer located outside the expansion part 111. Then, tear off the old sleeve skin 12, rewrap the new sleeve skin 12, and then rotate the sleeve ring 13 until the movable pieces are located outside the expansion part 111. Finally, pass the positioning bolts 14 through the piece body through hole and the skin body through hole, and then screw them into the screw holes.

[0032] The above embodiments are illustrative of the present application, but not limiting of the present application. Any simple transformation of the present application belongs to the protection scope of the present application.

Claims

1. A harness abrasion resistance testing device characterized by: The utility model provides a kind of friction mechanism, electric linear drive mechanism, chuck, support plate and controller, two groups of the chuck (3) are oppositely arranged on the top of support plate (4), the chuck (3) includes support (31), static clamping strip (32), dynamic clamping strip (33), manual linear drive mechanism (34), support rod (35), guide wheel (36), wheel seat (37) and connecting frame (38), the support (31) is installed on the top of support plate (4) by support rod (35), the static clamping strip (32) is fixed on the top surface of support (31), the dynamic clamping strip (33) is oppositely arranged with static clamping strip (32) and forms clamping opening together, the dynamic clamping strip (33) is driven by manual linear drive mechanism (34) to approach or away from static clamping strip (32) to make clamping opening contract or expand, the wheel seat (37) is fixed with static clamping strip (32) by connecting frame (38), the guide wheel (36) is rotatably connected on the top of wheel seat (37) and is located in the oblique top of clamping opening, the friction mechanism (1) includes core column (11), sleeve skin (12) and fan (15), the bottom end of core column (11) is fixed with electric linear drive mechanism (2) installed on support plate (4) and is driven to move back and forth along the length direction of wire harness (5) to be detected and top end is equipped with expansion part (111), the sleeve skin (12) is covered outside expansion part (111) and is tightly attached with wire harness (5) to be detected, the core column (11) is equipped with air duct (112) passing through expansion part (111), the outer wall of core column (11) is respectively equipped with air inlet and air outlet that are communicated with air duct (112) and the outside, the fan (15) can inject air into air duct (112) along air inlet, the controller is electrically connected with friction mechanism (1) and electric linear drive mechanism (2) respectively;The friction mechanism (1) further includes sleeve ring (13) and positioning bolt (14), the sleeve ring (13) is threadedly connected outside the column body of core column (11), one end of the sleeve ring (13) towards expansion part (111) is equipped with extension ring part (131), the extension ring part (131) is equipped with several cut grooves (132), each cut groove (132) separates the extension ring part (131) to form several movable pieces, the expansion part (111), the sleeve skin (12) and each movable piece are respectively equipped with screw hole, skin body through hole and piece body through hole, the positioning bolt (14) can pass through piece body through hole, skin body through hole and screw hole in turn to connect expansion part (111), sleeve skin (12) and each movable piece from inside to outside.

2. The wiring harness abrasion resistance testing apparatus of claim 1, wherein: The friction mechanism (1) further includes vertical telescopic rod (16), the upper and lower ends of vertical telescopic rod (16) are respectively fixed with core column (11) and electric linear drive mechanism (2).

3. The wiring harness abrasion resistance testing apparatus of claim 1, wherein: The electric linear drive mechanism (2) comprises a motor (21), an electric drive screw rod (22), an electric drive screw nut, an electric drive sliding block (23) and an electric drive track (24), the electric drive screw nut is located in the motor (21) and is driven to rotate by the motor (21), the electric drive screw rod (22) is horizontally through the motor (21) and is threadedly connected with the electric drive screw nut, the electric drive sliding block (23) is fixed at one end of the electric drive screw rod (22) and is slidably connected with the electric drive track (24), the electric drive track (24) is horizontally arranged on the top surface of the support plate (4), and the friction mechanism (1) is mounted on the electric drive sliding block (23).

4. The wiring harness abrasion resistance testing apparatus of claim 1, wherein: The manual linear drive mechanism (34) comprises a handle (341), a manual drive screw rod (342), a manual drive sliding block (343), a manual drive track (344) and a manual drive screw nut (345), the support base (31) is provided with a protrusion which is oppositely arranged with the static clamping strip (32), the manual drive screw rod (342) is horizontally arranged and rotatably connected between the static clamping strip (32) and the protrusion, one end of the manual drive screw rod (342) penetrates through the protrusion and is fixed with the handle (341), the manual drive screw nut (345) is threadedly connected outside the manual drive screw rod (342), the manual drive sliding block (343) is fixed with the manual drive screw nut (345) and slidably connected with the manual drive track (344), the manual drive track (344) is horizontally arranged on the top surface of the support base (31), and the dynamic clamping strip (33) is mounted on the manual drive sliding block (343).

5. The wiring harness abrasion resistance testing apparatus of claim 1, wherein: The guide wheels (36) of the two groups of chuck heads (3) are oppositely arranged.

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