Power-on detection device for wire harness test

Abstract

The invention belongs to the technical field of wire harness testing, and particularly discloses a power-on detection device for wire harness testing, which comprises an insulation box, a lap joint cavity is formed in the insulation box, the top of the lap joint cavity penetrates to the upper part of the insulation box, and fitting grooves are formed in the edges of the inner walls of the four sides, close to the lap joint cavity, of the top of the insulation box. A cover plate is arranged between the inner walls of the attaching groove, and an adjusting groove is formed in one side of the lap joint cavity. According to the invention, through the arrangement of the electric induction mechanism, the cooling assembly, the butt joint assembly and the constraint assembly, the current flowing through the wire harness can be monitored in real time when the wire harness is measured, corresponding adjustment operation can be performed when the current is large, the current can be induced through the electric induction mechanism, and then the cooling assembly and the constraint assembly are driven to work. When the current is large, the induction mechanism drives the constraint assembly to work and cuts off the butt joint assembly at the same time, and therefore damage to equipment caused by the large current is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of wire harness testing, and in particular to a power-on detection device for wire harness testing. Background Art

[0002] A wiring harness is a component that is formed by crimping contact terminals made of copper material with wires and cables, and then plasticizing an insulator or adding a metal shell to the outside to form a connecting circuit. To ensure the safe and reliable use of the wiring harness, a continuity test is usually performed before the wiring harness is put into use to determine whether the conductivity of each circuit in the wiring harness is qualified.

[0003] After the existing test equipment connects the wiring harness, when the supplied current is large, it can only rely on an external circuit breaker to cut off the line. The test equipment itself cannot make real-time feedback adjustments based on changes in the connected current. There is a reaction time difference between the test equipment and the circuit breaker, resulting in the inability to make timely adjustments based on changes in the current inside the wiring harness. Summary of the invention

[0004] The purpose of the present invention is to provide a power-on detection device for wire harness testing, which solves the problem that when the current is large during wire harness testing, the line can only be cut off by an external circuit breaker, and the test equipment itself cannot make real-time feedback adjustments according to the changes in the connected current.

[0005] To achieve the above object, the present invention adopts the following technical scheme: a power-on detection device for wire harness testing, comprising an insulating box, a lap joint cavity is provided inside the insulating box, the top of the lap joint cavity penetrates to the top of the insulating box, a fitting groove is provided at the top of the insulating box near the edges of the inner walls of the four sides of the lap joint cavity, a cover plate is provided between the inner walls of the fitting groove, an adjustment groove is provided on one side of the lap joint cavity, a docking assembly is provided inside the adjustment groove, and an electric induction mechanism is provided inside the lap joint cavity; A constraint component is provided inside the adjustment groove, a partition net is provided on the top of the cover plate, an electric connection block is fixed between the inner walls of the adjustment groove near the inner edge of the overlapping cavity, four through holes are equidistantly provided on the outer surface of the electric connection block along the circumferential direction and penetrate to both ends, a guide groove is provided in the middle of one side of the electric connection block, a socket is provided on the other side of the overlapping cavity, the socket penetrates to the outside of the insulating box, and a first copper column is fixed between the inner walls of the socket near the inner edge of the overlapping cavity.

[0006] Preferably, the electric induction mechanism includes a constraint sleeve, a cooling component is provided on the side wall of the constraint sleeve, the constraint sleeve is slidably connected between the inner walls of the adjustment groove, an annular constraint groove is provided between the inner walls of the constraint sleeve near one side edge, the inner wall of the annular constraint groove is inclined near one side edge, push rods are slidably connected between the inner walls of the four through-openings, one end of the four push rods are correspondingly fixed on one side of the constraint sleeve, the other ends of the four push rods extend to the inside of the overlap cavity, and connecting plates are fixed between the other ends of the four push rods.

[0007] Preferably, copper blocks are fixed on one side of the connecting plate and one end of the first copper column, two bayonet holes are opened on the top of the two copper blocks near the edge of one side, and clamping rods are fixed between the inner walls on both sides of the multiple bayonet holes, and the two bayonet holes located on the same side of the two copper blocks form a group.

[0008] Preferably, two arc-shaped bimetallic strips are arranged inside the adjustment groove, copper plates are fixed at both ends of the two arc-shaped bimetallic strips, limiting openings are opened at the bottoms of multiple copper plates, multiple copper plates are correspondingly engaged in the inside of the openings, multiple clamping rods are correspondingly located inside the limiting openings, and the arc-shaped protruding parts of the two arc-shaped bimetallic strips are opposite.

[0009] Preferably, the cooling assembly includes a first annular cavity, which is opened inside the insulating box and located on the outside of the adjustment groove. An inner wall on one side of the first annular cavity is provided with a plurality of through holes that penetrate into the interior of the adjustment groove at equal intervals along the circumferential direction. A side branch pipe is fixed to the outer surface of the insulating box, and the side branch pipe is connected to the interior of the first annular cavity.

[0010] Preferably, a second annular cavity is formed on the side wall of the constraint sleeve, and a plurality of side openings penetrating to the outside are formed on the inner wall of one side of the second annular cavity at equal intervals along the circumferential direction, and the plurality of side openings are relatively connected to the through hole, and drainage holes are formed inside the four push rods, and one end of the four drainage holes corresponds to penetrating into the interior of the second annular cavity, and the other end of the four drainage holes corresponds to penetrating into one side of the connecting plate.

[0011] Preferably, the docking assembly includes a second copper column, which is slidably connected between the inner walls of the constraining sleeve, and a hexagonal tube is fixed to one end of the second copper column, and one end of the hexagonal tube slides and extends to the outside of the insulating box, and one end of the second copper column and one end of the electrical connection block are both equidistantly provided with multiple electrical connection holes.

[0012] Preferably, a plurality of copper rods are fixed to the other end of the second copper column, and the plurality of copper rods are correspondingly inserted into the electrical connection holes on the electrical connection block. A guide rod is fixed to the other end of the second copper column, and the guide rod is inserted into the guide groove. A traction spring is fixed to one end of the guide rod, and one end of the traction spring is fixed to the inner bottom surface of the guide groove.

[0013] Preferably, a plurality of copper contacts are equidistantly arranged on the outer surface of the guide rod, and the outer surfaces of the plurality of copper contacts are in contact with the inner wall of the guide groove, and a plurality of indicator lights are equidistantly arranged on the top of the insulating box near one side edge, and the plurality of indicator lights are electrically connected with the copper contacts.

[0014] Preferably, the constraint assembly includes a plurality of spring clamps, and a plurality of mounting grooves are equidistantly provided at the connection portion between the second copper column and the hexagonal tube in the circumferential direction, one end of each of the spring clamps is correspondingly fixed on an inner wall of one side of the mounting groove, one side of each of the spring clamps extends to the interior of the annular constraint groove, and one side of each of the spring clamps is in the shape of an arc.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is provided with an electric induction mechanism, a cooling component, a docking component and a restraining component, which is conducive to real-time monitoring of the current flowing through the wiring harness when measuring the wiring harness, and making corresponding adjustment operations when the current is large. The electric induction mechanism can sense the current, thereby driving the cooling component and the restraining component to work. When the current is large, the induction mechanism drives the restraining component to work and cuts off the docking component at the same time, thereby avoiding damage to the equipment caused by large current; 2. The present invention is provided with an electric induction mechanism, which can make corresponding actions according to the current size in the circuit, thereby driving the cooling component and the constraint component to work. When the electric induction mechanism is working, by setting two arc-shaped bimetallic strips in the circuit, the arc-shaped bimetallic strips generate more heat when the current is large, thereby deforming, which is used as a driving force to drive the cooling component and the constraint component to work. When the cooling component is working, the side branch pipe is first connected to the external cooling air supply pipeline, and then when the side port on the second annular cavity is opposite to the through hole on the first annular cavity, the second annular cavity and the first annular cavity can be connected to each other, and the cold air will enter the overlap cavity through the drainage hole on the second annular cavity for cooling; 3. The present invention can control the connection and disconnection of the wires by providing a docking assembly, and can prompt people with the working state of the electric induction mechanism through an indicator light. When the docking assembly is working, the copper rod on the second copper column is docked with the electrical connection hole on the electrical connection block, so that electrical conduction can be completed. At the same time, a copper contact piece is provided on the guide rod, and the number of light-emitting indicators is controlled by the number of the copper contact pieces docking and affixing with the guide groove, so as to convey the working state of the electric induction mechanism to people; 4. The present invention is provided with a constraint component, which can constrain the wires in the process of the electric induction mechanism cutting off the circuit to prevent the wires from loosening at the joints during operation. When the constraint component is working, the inclined surface of the inner wall on one side of the annular constraint groove fits with the arc surface on one side of the spring clamp, so that the spring clamp can be squeezed into the inside of the hexagonal tube, thereby clamping the wire harness inside the hexagonal tube to a limit position. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of a three-dimensional structure of a power-on detection device for wiring harness testing provided by the present invention; Figure 2 The present invention provides a schematic diagram of the other side of the three-dimensional structure of a power-on detection device for wiring harness testing; Figure 3 The present invention provides a top-view stereoscopic structural schematic diagram of an insulating box in a power-on detection device for wiring harness testing; Figure 4 The present invention provides a cross-sectional three-dimensional structural schematic diagram of a power-on detection device for wiring harness testing; Figure 5 The present invention provides a cross-sectional three-dimensional structural schematic diagram of an insulating box in a power-on detection device for wiring harness testing; Figure 6 The present invention provides a cross-sectional three-dimensional structural schematic diagram of a second copper column and an electrical connection block in a power-on detection device for wiring harness testing; Figure 7 The present invention provides a cross-sectional three-dimensional structural schematic diagram of a restraining sleeve in a power-on detection device for wiring harness testing; Figure 8 The present invention provides a schematic diagram of the main three-dimensional structure of a curved bimetallic strip in a power-on detection device for wiring harness testing; Fig. 9 For the present invention Figure 4 A magnified partial view of point A in the middle.

[0017] In the figure: 1. insulation box; 2. overlapping cavity; 3. fitting groove; 4. cover plate; 5. partition net; 6. indicator light; 7. hexagonal tube; 8. socket; 9. side branch pipe; 10. first copper column; 11. copper block; 12. bayonet; 13. clamping rod; 14. arc bimetallic strip; 15. limit opening; 16. first annular cavity; 17. adjustment groove; 18. second copper column; 19. electrical connection block; 20. copper plate; 21. through hole; 22. constraint sleeve; 23. annular constraint groove; 24. second annular cavity; 25. side opening; 26. drainage hole; 27. electrical connection hole; 28. copper rod; 29. ​​guide rod; 30. copper contact piece; 31. traction spring; 32. guide groove; 33. through opening; 34. push rod; 35. connecting plate; 36. spring clamp block; 37. installation groove. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] See also Figure 1-9 The present invention provides a technical solution: a power-on detection device for testing a wiring harness, comprising an insulating box 1, a lap joint cavity 2 is provided inside the insulating box 1, the top of the lap joint cavity 2 penetrates to the top of the insulating box 1, a fitting groove 3 is provided at the top of the insulating box 1 near the edges of the inner walls of the four sides of the lap joint cavity 2, a cover plate 4 is provided between the inner walls of the fitting groove 3, an adjustment groove 17 is provided on one side of the lap joint cavity 2, a docking assembly is provided inside the adjustment groove 17, and an electric induction mechanism is provided inside the lap joint cavity 2; A restraining assembly is provided inside the adjustment groove 17, a partition net 5 is provided on the top of the cover plate 4, an electric connection block 19 is fixed between the inner walls of the adjustment groove 17 near the inner edge of the lap cavity 2, and four through holes 33 are equidistantly provided on the outer surface of the electric connection block 19 along the circumferential direction, extending to both ends, a guide groove 32 is provided in the middle of one side of the electric connection block 19, a socket 8 is provided on the other side of the lap cavity 2, and the socket 8 extends to the outside of the insulating box 1, and a first copper column 10 is fixed between the inner walls of the socket 8 near the inner edge of the lap cavity 2.

[0020] The effect achieved is that, by providing an electric induction mechanism, corresponding actions can be taken according to the current size in the circuit, thereby driving the cooling component and the constraint component to work. By providing the cooling component, cooling nitrogen can be delivered to the inside of the lap joint cavity 2 when overloaded or the current is large, and the inside of the lap joint cavity 2 is cooled and flame-retardant by the cooled nitrogen. By providing the docking component, the connection and disconnection of the wires can be controlled to avoid damage to the equipment caused by large currents, and the working status of the electric induction mechanism can be prompted to people through the indicator light 6. By providing the constraint component, the wires can be constrained in the process of the electric induction mechanism cutting off the circuit to prevent the wires from loosening at the docking point during action. When the entire device measures the wiring harness, it can monitor the current size flowing through the wiring harness in real time, and make corresponding adjustments when the current is large.

[0021] like Figure 3 , Figure 4 and Figure 8As shown, the electric induction mechanism includes a constraint sleeve 22, a cooling assembly is provided on the side wall of the constraint sleeve 22, the constraint sleeve 22 is slidably connected between the inner walls of the adjustment groove 17, an annular constraint groove 23 is provided between the inner walls of the constraint sleeve 22 near one side edge, the inner wall of the annular constraint groove 23 is inclined near one side edge, push rods 34 are slidably connected between the inner walls of the four through openings 33, one end of the four push rods 34 is correspondingly fixed on one side of the constraint sleeve 22, the other ends of the four push rods 34 extend to the inside of the overlap cavity 2, and a connecting disk 35 is fixed between the other ends of the four push rods 34, one side of the connecting disk 35 and the first A copper block 11 is fixed at one end of the copper column 10, and two bayonet holes 12 are provided on the top of the two copper blocks 11 near one side edge, and a clamping rod 13 is fixed between the inner walls on both sides of the multiple bayonet holes 12. The two bayonet holes 12 located on the same side of the two copper blocks 11 are a group, and two arc-shaped bimetallic strips 14 are arranged inside the adjustment groove 17. Copper plates 20 are fixed at both ends of the two arc-shaped bimetallic strips 14, and limiting openings 15 are provided at the bottom of the multiple copper plates 20. The multiple copper plates 20 are correspondingly engaged in the inside of the bayonet holes 12, and the multiple clamping rods 13 are correspondingly located inside the limiting openings 15, and the arc-shaped protruding parts of the two arc-shaped bimetallic strips 14 are opposite.

[0022] The effect achieved is that, by setting two arc-shaped bimetallic strips 14 in the circuit, when the current is large, the heat generated by the arc-shaped bimetallic strips 14 is large, thereby causing deformation, which is used as a driving force to drive the cooling component and the constraint component to work. When the arc-shaped bimetallic strips 14 are heated and elastically deformed, since the two ends of the arc-shaped bimetallic strips 14 are clamped in the inside of the bayonet 12 through the copper plate 20, the connecting plate 35 can only be pushed to one side when elastic deformation occurs. When the connecting plate 35 slides, the push rod 34 drives the constraint sleeve 22 to slide, and the annular constraint groove on the constraint sleeve 22 When 23 and multiple spring clamps 36 contact each other, the second copper column 18 will be driven to slide to one side. When the copper plate 20 is clamped in the inside of the clamping port 12, the clamping rod 13 is clamped in the inside of the limiting port 15, so that the copper plate 20 can be limited. In actual use, the arc-shaped bimetallic strip 14 is a composite material composed of two or more metals or other materials with suitable properties. Due to the different thermal expansion coefficients of each component layer, when the temperature changes, the deformation of the active layer is greater than the deformation of the passive layer, so that the entire arc-shaped bimetallic strip 14 will bend to the passive layer side.

[0023] like Figure 4 , Figure 5 , Figure 7 and Fig. 9As shown, the cooling assembly includes a first annular cavity 16, which is opened inside the insulating box 1, and the first annular cavity 16 is located on the outside of the adjusting groove 17, and a plurality of through holes 21 penetrating into the inside of the adjusting groove 17 are equidistantly opened on the inner wall of one side of the first annular cavity 16 along the circumferential direction, a side branch pipe 9 is fixed to the outer surface of the insulating box 1, and the side branch pipe 9 is connected to the inside of the first annular cavity 16, a second annular cavity 24 is opened on the side wall of the constraint sleeve 22, and a plurality of side openings 25 penetrating to the outside are equidistantly opened on the inner wall of one side of the second annular cavity 24 along the circumferential direction, and the plurality of side openings 25 are relatively connected to the through hole 21, and a drainage hole 26 is opened inside each of the four push rods 34, and one end of the four drainage holes 26 correspondingly penetrates into the inside of the second annular cavity 24, and the other end of the four drainage holes 26 correspondingly penetrates into one side of the connecting plate 35.

[0024] The effect achieved is that the side branch pipe 9 is first connected to the external cooling air supply pipeline, and then when the electric induction mechanism pushes the constraint sleeve 22 to one side of the adjustment groove 17, when the side port 25 on the second annular cavity 24 is opposite to the through hole 21 on the first annular cavity 16, the second annular cavity 24 and the first annular cavity 16 can be connected to each other. At this time, the gas will enter the first annular cavity 16 through the side branch pipe 9, and then enter the second annular cavity 24 through the through hole 21 and the side port 25 in the first annular cavity 16, and enter the overlap cavity 2 through the drainage hole 26 on the second annular cavity 24 in the second annular cavity 24 for cooling. The cooling gas uses cooled nitrogen, and the non-flame retardant nature of nitrogen can cool and flame retard the interior of the equipment.

[0025] like Figure 4 and Figure 6 As shown, the docking assembly includes a second copper column 18, the second copper column 18 is slidably connected between the inner walls of the constraint sleeve 22, one end of the second copper column 18 is fixed with a hexagonal tube 7, one end of the hexagonal tube 7 slides and extends to the outside of the insulation box 1, one end of the second copper column 18 and one end of the electrical connection block 19 are equidistantly provided with a plurality of electrical connection holes 27, the other end of the second copper column 18 is fixed with a plurality of copper rods 28, the plurality of copper rods 28 are correspondingly inserted into the electrical connection holes 27 located on the electrical connection block 19, and the other end of the second copper column 18 is fixed with a plurality of copper rods 28. A guide rod 29 is fixed at one end, and the guide rod 29 is inserted into the guide groove 32. A traction spring 31 is fixed at one end of the guide rod 29, and one end of the traction spring 31 is fixed to the inner bottom surface of the guide groove 32. A plurality of copper contacts 30 are equidistantly arranged on the outer surface of the guide rod 29, and the outer surfaces of the plurality of copper contacts 30 are correspondingly fitted with the inner wall of the guide groove 32. A plurality of indicator lights 6 are equidistantly arranged on the top of the insulating box 1 near one side edge, and the plurality of indicator lights 6 are electrically connected with the corresponding copper contacts 30.

[0026] The effect achieved is that the hexagonal tube 7 can be used to guide and limit the second copper column 18 when it slides, and the copper rod 28 on the second copper column 18 is connected to the electrical connection hole 27 on the electrical connection block 19, so that electrical conduction can be completed. At the same time, a copper contact piece 30 is arranged on the guide rod 29. In actual use, two opposite copper contacts 30 form a group, and both ends of each indicator light 6 are connected to each group of two copper contacts 30. Therefore, when the guide rod 29 slides into the guide groove 32, when the outer surface of each group of two copper contacts 30 fits the inner wall of the guide groove 32, the corresponding indicator light 6 can be turned on and illuminated, so that the number of indicator lights 6 that light up can convey the working state of the electric induction mechanism to people. A traction spring 31 is fixed between one end of the guide rod 29 and the inner bottom surface of the guide groove 32. The pulling force of the traction spring 31 can make the second copper column 18 and the electrical connection block 19 dock more tightly.

[0027] like Figure 4 , Figure 6 and Fig. 9 As shown, the constraint assembly includes a plurality of spring clamps 36, and a plurality of mounting grooves 37 are equidistantly provided at the connection portion between the second copper column 18 and the hexagonal tube 7 along the circumferential direction. One end of the plurality of spring clamps 36 is correspondingly fixed on an inner wall of one side of the mounting groove 37, and one side of the plurality of spring clamps 36 extends to the interior of the annular constraint groove 23, and one side of the plurality of spring clamps 36 is in an arc shape.

[0028] The effect achieved is that, in the process of pushing the constraint sleeve 22 toward one side of the adjustment groove 17, the spring clamp block 36 can be squeezed toward the inside of the hexagonal tube 7 by the mutual fit of the inclined surface of the inner wall on one side of the annular constraint groove 23 and the arc surface on one side of the spring clamp block 36, thereby clamping the wiring harness inside the hexagonal tube 7 to limit its position.

[0029] Working principle: When using the device, first insert one end of the wiring harness into the hexagonal tube 7, so that one end of the wiring harness is connected to the electrical connection hole 27 on the second copper column 18. When the second copper column 18 is connected to the electrical connection block 19, it is pulled by the elastic tension of the traction spring 31, so as to ensure the stability of the connection. By setting two arc-shaped bimetallic strips 14 in the circuit, the heat generated by the arc-shaped bimetallic strip 14 is large when the current is large, thereby causing deformation. When the arc-shaped bimetallic strip 14 is elastically deformed, it can only push the connecting disk 35 to one side. When the connecting disk 35 slides, the push rod 34 drives the constraint sleeve 22 to slide. During the sliding process of the constraint sleeve 22, when the annular constraint groove 23 contacts with a plurality of spring clamps 36, the inclined surface of the inner wall on one side of the annular constraint groove 23 fits with the arc surface on one side of the spring clamp 36, so that the spring clamp 36 can be squeezed into the inside of the hexagonal tube 7, thereby the hexagonal tube is fixed. 7, when the constraint sleeve 22 continues to slide toward the side of the adjustment groove 17, multiple copper rods 28 will slide out from the inside of the electrical connection hole 27, thereby cutting off the circuit, and will also drive the guide rod 29 to slide out from the inside of the guide groove 32. When sliding out, the outer surface of each group of two copper contacts 30 is gradually separated from the inner wall of the guide groove 32. At this time, the indicator lights 6 are extinguished one by one. People can observe the state of the indicator lights 6 to determine whether the circuit is completely cut off. At the same time, when the side opening 25 on the second annular cavity 24 is opposite to the through hole 21 on the first annular cavity 16, the second annular cavity 24 and the first annular cavity 16 can be connected to each other. At this time, the gas will enter the first annular cavity 16 from the side branch pipe 9, and then enter the second annular cavity 24 from the through hole 21 and the side opening 25 in the first annular cavity 16, and enter the lap cavity 2 in the second annular cavity 24 through the drainage hole 26 on the second annular cavity 24 for cooling.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A power-on detection device for wiring harness testing, characterized in that: The insulating box (1) comprises an insulating box (1), wherein a lap joint cavity (2) is provided inside the insulating box (1), the top of the lap joint cavity (2) extends to the top of the insulating box (1), a fitting groove (3) is provided at the top of the insulating box (1) near the edges of the inner walls of the four sides of the lap joint cavity (2), a cover plate (4) is provided between the inner walls of the fitting groove (3), an adjustment groove (17) is provided on one side of the lap joint cavity (2), a docking assembly is provided inside the adjustment groove (17), and an electric induction mechanism is provided inside the lap joint cavity (2); A restraining assembly is arranged inside the adjustment groove (17), a partition net (5) is arranged on the top of the cover plate (4), an electric connection block (19) is fixed between the inner walls of the adjustment groove (17) near the inner edge of the lap joint cavity (2), the outer surface of the electric connection block (19) is provided with four through openings (33) extending to both ends at equal intervals along the circumferential direction, a guide groove (32) is arranged in the middle of one side of the electric connection block (19), a plug hole (8) is arranged on the other side of the lap joint cavity (2), the plug hole (8) extends to the outside of the insulating box (1), and a first copper column (10) is fixed between the inner walls of the plug hole (8) near the inner edge of the lap joint cavity (2).

2. The power-on detection device for wiring harness testing according to claim 1, characterized in that: The electric induction mechanism comprises a restraining sleeve (22), a cooling assembly is provided on the side wall of the restraining sleeve (22), the restraining sleeve (22) is slidably connected between the inner walls of the adjustment groove (17), an annular restraining groove (23) is provided between the inner walls of the restraining sleeve (22) near one side edge, the inner wall of the annular restraining groove (23) is inclined near one side edge, push rods (34) are slidably connected between the inner walls of the four through openings (33), one end of the four push rods (34) are fixed to one side of the restraining sleeve (22), the other ends of the four push rods (34) extend to the inside of the overlap cavity (2), and a connecting plate (35) is fixed between the other ends of the four push rods (34).

3. The power-on detection device for wiring harness testing according to claim 2, characterized in that: A copper block (11) is fixed to one side of the connection plate (35) and one end of the first copper column (10); two clips (12) are provided on the tops of the two copper blocks (11) near one edge; a clip rod (13) is fixed between the inner walls on both sides of the clips (12); and the two clips (12) located on the same side of the two copper blocks (11) form a group.

4. The power-on detection device for wiring harness testing according to claim 3, characterized in that: Two arc-shaped bimetallic strips (14) are arranged inside the adjustment groove (17), copper plates (20) are fixed at both ends of the two arc-shaped bimetallic strips (14), a plurality of the copper plates (20) are provided with a limiting opening (15) at the bottom, the plurality of the copper plates (20) are correspondingly engaged inside the opening (12), the plurality of the clamping rods (13) are correspondingly located inside the limiting opening (15), and the arc-shaped protruding parts of the two arc-shaped bimetallic strips (14) are opposite to each other.

5. The power-on detection device for wiring harness testing according to claim 4, characterized in that: The cooling assembly comprises a first annular cavity (16), the first annular cavity (16) being opened inside the insulating box (1), and the first annular cavity (16) being located outside the adjusting groove (17), a plurality of through holes (21) penetrating into the adjusting groove (17) being opened at equal intervals along the circumferential direction on an inner wall of one side of the first annular cavity (16), and a side branch pipe (9) being fixed to the outer surface of the insulating box (1), and the side branch pipe (9) being connected to the interior of the first annular cavity (16).

6. The power-on detection device for wiring harness testing according to claim 5, characterized in that: A second annular cavity (24) is formed on the side wall of the constraint sleeve (22); a plurality of side openings (25) penetrating to the outside are formed on the inner wall of one side of the second annular cavity (24) at equal intervals in the circumferential direction; the plurality of side openings (25) are relatively connected to the through hole (21); a drainage hole (26) is formed inside each of the four push rods (34); one end of each of the four drainage holes (26) penetrates into the interior of the second annular cavity (24); and the other end of each of the four drainage holes (26) penetrates into one side of the connecting plate (35).

7. The power-on detection device for wiring harness testing according to claim 6, characterized in that: The docking assembly comprises a second copper column (18), the second copper column (18) being slidably connected between the inner walls of the constraining sleeve (22), a hexagonal tube (7) being fixed to one end of the second copper column (18), one end of the hexagonal tube (7) being slidably extended to the outside of the insulating box (1), and a plurality of electrical connection holes (27) being equidistantly formed at one end of the second copper column (18) and one end of the electrical connection block (19).

8. The power-on detection device for wiring harness testing according to claim 7, characterized in that: A plurality of copper rods (28) are fixed to the other end of the second copper column (18), and the plurality of copper rods (28) are correspondingly inserted into the interior of the electrical connection holes (27) located on the electrical connection block (19). A guide rod (29) is fixed to the other end of the second copper column (18), and the guide rod (29) is inserted into the interior of the guide groove (32). A traction spring (31) is fixed to one end of the guide rod (29), and one end of the traction spring (31) is fixed to the inner bottom surface of the guide groove (32).

9. The power-on detection device for wiring harness testing according to claim 8, characterized in that: The outer surface of the guide rod (29) is provided with a plurality of copper contacts (30) at equal intervals, and the outer surfaces of the plurality of copper contacts (30) are correspondingly fitted with the inner wall of the guide groove (32). The top of the insulating box (1) is provided with a plurality of indicator lights (6) at equal intervals near the edge of one side, and the plurality of indicator lights (6) are correspondingly electrically connected with the copper contacts (30).

10. The power-on detection device for wiring harness testing according to claim 9, characterized in that: The constraint assembly comprises a plurality of spring clamps (36); a connection portion between the second copper column (18) and the hexagonal tube (7) is provided with a plurality of mounting grooves (37) equidistantly arranged along a circumferential direction; one end of each of the plurality of spring clamps (36) is correspondingly fixed on an inner wall of one side of the mounting groove (37); one side of each of the plurality of spring clamps (36) extends into the interior of the annular constraint groove (23); and one side of each of the plurality of spring clamps (36) is in the shape of an arc surface.

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