A power-on detection device for wire harness testing

Abstract

The application belongs to the technical field of wire harness testing, and discloses a power-on detection device for wire harness testing, which comprises an insulation box, a lap joint cavity is arranged in the interior of the insulation box, the top of the lap joint cavity penetrates to the upper side of the insulation box, a fitting groove is arranged at the edge of the four side inner walls of the lap joint cavity, a cover plate is arranged between the inner walls of the fitting groove, and an adjusting groove is arranged on one side of the lap joint cavity; the inductive mechanism, the cooling assembly, the docking assembly and the constraint assembly are arranged, which are beneficial to monitoring the current flowing through the wire harness in real time when the wire harness is measured, and corresponding adjustment operation is made when the current is large; the inductive mechanism can sense the size of the current, and then drive the cooling assembly and the constraint assembly to work; when the current is large, the inductive mechanism drives the constraint assembly to work while cutting off the docking assembly, so that damage to the equipment caused by large current is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of harness testing, in particular to a power-on detection device for harness testing. BACKGROUND

[0002] The harness refers to the contact terminal and the wire cable pressure joint after being punched from copper material, and the outside is plastic pressure insulation body or additional metal shell, etc., to form a connected circuit assembly by harness lashing, in order to ensure the safe and reliable use of the harness, before the harness is put into use, the conduction test is usually carried out to judge whether the conduction state of each line in the harness is qualified.

[0003] At present, when the supplied current is large, the existing test equipment can only rely on the external circuit breaker to cut off the line after the harness is butt jointed, and the test equipment itself cannot make real-time feedback adjustment according to the change of the connected current, so there is a reaction time difference between the test equipment and the circuit breaker, which leads to the inability to make timely adjustment according to the change of the internal current of the harness. SUMMARY

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

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme: a power-on detection device for harness testing, comprising an insulation box, a lap joint cavity is formed in the inside of the insulation box, the top of the lap joint cavity penetrates to the upper side of the insulation box, a fitting groove is formed in the top of the insulation box near the inner wall edge of the four sides of the lap joint cavity, a cover plate is arranged between the inner walls of the fitting groove, an adjusting groove is formed on one side of the lap joint cavity, a butt joint assembly is arranged in the inside of the adjusting groove, and an electric induction mechanism is arranged in the inside of the lap joint cavity.

[0006] A constraint assembly is arranged in the inside of the adjusting groove, a mesh is arranged on the top of the cover plate, an electric contact block is fixed between the inner wall of the adjusting groove near the inner side edge of the lap joint cavity, four through holes penetrating to both ends are formed on the outer surface of the electric contact block at equal intervals in the circumferential direction, a guide groove is formed on one side of the electric contact block in the middle, a jack is formed on the other side of the lap joint cavity, the jack penetrates to the outside of the insulation box, and a first copper column is fixed between the inner walls of the jack near the inner side edge of the lap joint cavity.

[0007] Preferably, the electric induction mechanism comprises a constraint sleeve, a cooling assembly is arranged on the side wall of the constraint sleeve, the constraint sleeve is slidingly connected between the inner walls of the adjusting groove, an annular constraint groove is arranged between the inner walls of the constraint sleeve close to one side edge, the inner wall of the annular constraint groove is inclined close to one side edge, four push rods are slidingly connected between the inner walls of the four through holes, one end of each of the four push rods is fixed on one side of the constraint sleeve, the other end of each of the four push rods extends into the lapping cavity, and a connecting disc is fixed between the other ends of the four push rods.

[0008] Preferably, a copper block is fixed on one side of the connecting disc and one end of the first copper column, two clamping holes are arranged on the top of each of the two copper blocks close to one side edge, a clamping rod is fixed between the inner walls of each of the plurality of clamping holes, and the two clamping holes on the same side of the two copper blocks form a group.

[0009] Preferably, two arc-shaped bimetallic strips are arranged in the adjusting groove, a copper plate is fixed on each end of the two arc-shaped bimetallic strips, a limiting hole is arranged on the bottom of each of the plurality of copper plates, each of the plurality of copper plates is clamped in the clamping hole, each of the plurality of clamping rods is located in the limiting hole, and the arc-shaped convex parts of the two arc-shaped bimetallic strips are opposite.

[0010] Preferably, the cooling assembly comprises a first annular cavity, the first annular cavity is arranged in the inside of the insulating box, the first annular cavity is located outside the adjusting groove, a plurality of through holes are equidistantly arranged on the inner wall of one side of the first annular cavity in the circumferential direction and penetrate into the inside of the adjusting groove, a side branch pipe is fixed on the outer surface of the insulating box, and the side branch pipe communicates with the inside of the first annular cavity.

[0011] Preferably, a second annular cavity is arranged on the side wall of the constraint sleeve, a plurality of side holes are equidistantly arranged on the inner wall of one side of the second annular cavity in the circumferential direction and penetrate to the outside, the plurality of side holes are in communication with the through holes, a drainage hole is arranged in each of the four push rods, one end of each of the four drainage holes penetrates into the inside of the second annular cavity, and the other end of each of the four drainage holes penetrates into one side of the connecting disc.

[0012] Preferably, the butt joint assembly comprises a second copper column, the second copper column is slidingly connected between the inner walls of the constraint sleeve, a hexagonal pipe is fixed on one end of the second copper column, one end of the hexagonal pipe slidingly extends to the outside of the insulating box, and a plurality of electric connection holes are equidistantly arranged on one end of the second copper column and one end of the electric block.

[0013] Preferably, the other end of the second copper column is fixed with a plurality of copper rods, the plurality of copper rods are inserted into the electrical connection holes on the electrical connector, the other end of the second copper column is fixed with a guide rod, the guide rod is inserted into the guide slot, one end of the guide rod is fixed with a traction spring, one end of the traction spring is fixed in the inner bottom surface of the guide slot.

[0014] Preferably, the outer surface of the guide rod is equidistantly provided with a plurality of copper contact pieces, the outer surfaces of the plurality of copper contact pieces are correspondingly attached to the inner walls of the guide slot, a plurality of indicator lights are equidistantly arranged on the top of the insulating box near the side edge, and the plurality of indicator lights are electrically connected between the copper contact pieces.

[0015] Preferably, the constraint assembly comprises a plurality of spring clamping blocks, the connecting part of the second copper column and the hexagonal pipe is equidistantly provided with a plurality of installation grooves in the circumferential direction, one end of the plurality of spring clamping blocks is correspondingly fixed on the inner wall of the installation groove, one side of the plurality of spring clamping blocks extends into the annular constraint groove, and one side of the plurality of spring clamping blocks is arc-shaped.

[0016] Compared with the prior art, the present application has the following advantages:

[0017] 1、The electric induction mechanism, the cooling assembly, the docking assembly and the constraint assembly are arranged, which is beneficial to monitoring the current flowing through the wire harness in real time when the wire harness is measured, and corresponding adjustment operation is made when the current is large, the electric induction mechanism can sense the size of the current, and then drive the cooling assembly and the constraint assembly to work, and when the electric induction mechanism drives the constraint assembly to work, the docking assembly is also cut off, so that the damage of large current to the equipment is avoided.

[0018] 2、The electric induction mechanism is arranged, which can make corresponding action according to the size of the current in the circuit, so as to drive the cooling assembly and the constraint assembly to work, when the electric induction mechanism works, the two arc bimetallic pieces are arranged in the circuit, the heat generated by the arc bimetallic pieces is large when the current is large, so that the arc bimetallic pieces are deformed, which is used as a driving force to drive the cooling assembly and the constraint assembly to work, when the cooling assembly works, the side branch pipe is first connected with the external cooling air supply pipeline, then when the side opening 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 are communicated with each other, and the cold air enters the lap joint cavity through the drainage hole on the second annular cavity for cooling.

[0019] 3、The application can control the butt joint of the wire, and can indicate the working state of the electric induction mechanism through the indicating lamp, when the butt joint assembly works, the copper rod on the second copper column is butt jointed with the electricity connection hole on the electricity block, so that the electric conduction can be completed, and the copper contact piece is arranged on the guide rod, the number of the light emitting of the indicating lamp is controlled by the butt joint and the number of the guide groove of the copper contact piece, so as to transmit the working state of the electric induction mechanism to people.

[0020] 4、The application can constrain the wire in the process that the electric induction mechanism cuts off the circuit, prevent the wire from being loose when moving, when the constraint assembly works, the inclined surface of the inner wall of the annular constraint groove is matched with the arc surface of one side of the spring clamp block, the spring clamp block can be extruded to the inside of the hexagonal tube, so that the wire harness in the hexagonal tube is clamped and limited. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A side perspective structural schematic view of a power-on detection device for wire harness testing is provided for the application;

[0022] Figure 2 Another side perspective structural schematic view of a power-on detection device for wire harness testing is provided for the application;

[0023] Figure 3 A top view perspective structural schematic view of an insulation box in a power-on detection device for wire harness testing is provided for the application;

[0024] Figure 4 A sectional view perspective structural schematic view of a power-on detection device for wire harness testing is provided for the application;

[0025] Figure 5 A sectional view perspective structural schematic view of an insulation box in a power-on detection device for wire harness testing is provided for the application;

[0026] Figure 6 A sectional view perspective structural schematic view of a second copper column and an electricity block in a power-on detection device for wire harness testing is provided for the application;

[0027] Figure 7 A sectional view perspective structural schematic view of a constraint sliding sleeve in a power-on detection device for wire harness testing is provided for the application;

[0028] Figure 8 A front view perspective structural schematic view of an arc-shaped bimetallic strip in a power-on detection device for wire harness testing is provided for the application;

[0029] Figure 9 A front view perspective structural schematic view of an arc-shaped bimetallic strip in a power-on detection device for wire harness testing is provided for the application; Figure 4 A partial enlarged view of A in the application.

[0030] In the figure: 1, insulation box; 2, lap cavity; 3, fitting groove; 4, cover plate; 5, screen; 6, indicator light; 7, hexagonal tube; 8, jack; 9, side branch pipe; 10, first copper column; 11, copper block; 12, bayonet; 13, clamping rod; 14, arc bimetallic strip; 15, limiting port; 16, first annular cavity; 17, adjusting groove; 18, second copper column; 19, electrical interface block; 20, copper plate; 21, through hole; 22, constraint sliding sleeve; 23, annular constraint groove; 24, second annular cavity; 25, side port; 26, drainage hole; 27, electrical interface hole; 28, copper rod; 29, guide rod; 30, copper contact piece; 31, traction spring; 32, guide groove; 33, through port; 34, push rod; 35, connecting disc; 36, spring clamp block; 37, mounting groove. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] Please refer to Figures 1-9 The present application provides a technical solution: a power-on detection device for wire harness testing, comprising an insulation box 1, the inside of the insulation box 1 is provided with a lap cavity 2, the top of the lap cavity 2 penetrates to the upper side of the insulation box 1, the top of the insulation box 1 is provided with a fitting groove 3 near the four inner wall edges of the lap cavity 2, the inner walls of the fitting groove 3 are provided with a cover plate 4, one side of the lap cavity 2 is provided with an adjusting groove 17, the inside of the adjusting groove 17 is provided with a docking assembly, and the inside of the lap cavity 2 is provided with an electrical induction mechanism.

[0033] The inside of the adjusting groove 17 is provided with a constraint assembly, the top of the cover plate 4 is provided with a screen 5, the inner walls of the adjusting groove 17 are fixed with an electrical interface block 19 near the inner side edges of the lap cavity 2, four through ports 33 penetrating to both ends are equidistantly provided on the outer surface of the electrical interface block 19 in the circumferential direction, a guide groove 32 is provided on one side of the electrical interface block 19, the other side of the lap cavity 2 is provided with a jack 8, the jack 8 penetrates to the outside of the insulation box 1, and a first copper column 10 is fixed between the inner walls of the jack 8 near the inner side edges of the lap cavity 2.

[0034] The achieved effect is that: by setting the electric induction mechanism, corresponding actions can be made according to the current size in the circuit, so as to drive the cooling assembly and the constraint assembly to work, by setting the cooling assembly, cooling nitrogen can be transported to the inside of the lap joint cavity 2 when the overload or the current is large, the inside of the lap joint cavity 2 is cooled and flame retarded by the cooling nitrogen, by setting the butt joint assembly, the butt joint of the wire can be controlled to be on or off, the damage to the equipment caused by the large current is avoided, and the working state of the electric induction mechanism can be prompted to people through the indicator light 6, by setting the constraint assembly, the wire can be constrained during the process that the electric induction mechanism cuts off the circuit, so as to prevent the wire from being loose with the butt joint during the action, when the wire harness is measured, the current size flowing through the wire harness can be monitored in real time, and corresponding adjustment operations are made when the current is large.

[0035] As shown in Figure 3 , Figure 4 and Figure 8 , the electric induction mechanism comprises a constraint sleeve 22, the side wall of the constraint sleeve 22 is provided with a cooling assembly, the constraint sleeve 22 is slidingly connected between the inner walls of the adjusting groove 17, the annular constraint groove 23 is formed 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, the four push rods 34 are slidingly connected between the inner walls of the four through holes 33, one end of the four push rods 34 is fixed on one side of the constraint sleeve 22, the other end of the four push rods 34 extends to the inside of the lap joint cavity 2, and the other end of the four push rods 34 is fixed with the connecting disc 35, the copper block 11 is fixed on one side of the connecting disc 35 and one end of the first copper column 10, two clamping holes 12 are formed in the top of the two copper blocks 11 near one side edge, the clamping rods 13 are fixed between the inner walls of the two clamping holes 12 on the same side of the two copper blocks 11, the two clamping holes 12 on the same side of the two copper blocks 11 form a group, the adjusting groove 17 is provided with two arc-shaped bimetallic strips 14, the copper plates 20 are fixed at the two ends of the two arc-shaped bimetallic strips 14, the limiting holes 15 are formed in the bottoms of the plurality of copper plates 20, the plurality of copper plates 20 are clamped in the inside of the clamping holes 12, the plurality of clamping rods 13 are located in the inside of the limiting holes 15, and the arc-shaped convex parts of the two arc-shaped bimetallic strips 14 are opposite.

[0036] The achieved effect is that by setting two arc bimetallic strips 14 in the circuit, when the current is large, the arc bimetallic strip 14 generates more heat, thereby generating deformation to drive the cooling assembly and the constraint assembly to work, when the arc bimetallic strip 14 is elastically deformed due to heating, since the two ends of the arc bimetallic strip 14 are clamped in the inside of the bayonet 12 through the copper plate 20, when elastic deformation is generated, the connecting disc 35 can only be pushed to one side, when the connecting disc 35 slides, the push rod 34 drives the constraint sleeve 22 to slide, when the annular constraint groove 23 on the constraint sleeve 22 is in contact with the plurality of spring clamping blocks 36, the second copper column 18 is driven to slide to one side, when the copper plate 20 is clamped in the inside of the bayonet 12, the clamping rod 13 is clamped in the inside of the limiting port 15, thereby limiting the copper plate 20, in actual use, the arc bimetallic strip 14 is a composite material composed of two or more metals or other materials with suitable properties, since the thermal expansion coefficients of the layers are different, when the temperature changes, the deformation of the active layer is greater than that of the passive layer, so that the whole arc bimetallic strip 14 will bend to the passive layer side.

[0037] As shown in Figure 4 , Figure 5 , Figure 7 and Figure 9 , the cooling assembly comprises a first annular cavity 16, the first annular cavity 16 is arranged in the inside of the insulating box 1, and the first annular cavity 16 is located outside the adjusting groove 17, a plurality of through holes 21 penetrating into the inside of the adjusting groove 17 are arranged on the side inner wall of the first annular cavity 16 in the circumferential direction at equal intervals, the outer surface of the insulating box 1 is fixed with a side branch pipe 9, the side branch pipe 9 is communicated to the inside of the first annular cavity 16, a second annular cavity 24 is arranged on the side wall of the constraint sleeve 22, a plurality of side ports 25 penetrating to the outside are arranged on the side inner wall of the second annular cavity 24 in the circumferential direction at equal intervals, the plurality of side ports 25 are communicated with the through holes 21, the inside of the four push rods 34 is arranged with a drainage hole 26, one end of the four drainage holes 26 is correspondingly penetrated into the inside of the second annular cavity 24, the other end of the four drainage holes 26 is correspondingly penetrated into one side of the connecting disc 35.

[0038] The achieved effect is that the side branch pipe 9 is connected with the external cooling gas supply pipeline first, then the second annular cavity 24 is communicated with the first annular cavity 16 when the side opening 25 on the second annular cavity 24 is opposite to the through hole 21 on the first annular cavity 16 during the process that the restraint sliding sleeve 22 is pushed to one side of the adjusting groove 17 by the electric induction mechanism, at this time, the gas can enter the first annular cavity 16 from the side branch pipe 9, then enter the second annular cavity 24 from the through hole 21 and the side opening 25 in the first annular cavity 16, and then enter the lap joint cavity 2 through the drainage hole 26 on the second annular cavity 24 to cool, and the cooling gas is cooled nitrogen, which can cool and flame retardant the inside of the equipment through the non-flame retardant property of nitrogen.

[0039] As shown in Figure 4 and Figure 6 , the docking assembly comprises a second copper column 18 which is slidingly connected between the inner walls of the restraint sliding sleeve 22, one end of the second copper column 18 is fixed with a hexagonal pipe 7, one end of the hexagonal pipe 7 slidingly extends to the outside of the insulating box 1, a plurality of electrically connected holes 27 are equidistantly arranged on one end of the second copper column 18 and one end of the electric contact block 19, a plurality of copper rods 28 are fixed on the other end of the second copper column 18, the plurality of copper rods 28 are inserted into the electrically connected holes 27 on the electric contact block 19, a guide rod 29 is fixed on the other end of the second copper column 18, the guide rod 29 is inserted into the guide groove 32, a traction spring 31 is fixed on one end of the guide rod 29, one end of the traction spring 31 is fixed on the inner bottom surface of the guide groove 32, a plurality of copper contact pieces 30 are equidistantly arranged on the outer surface of the guide rod 29, the outer surfaces of the plurality of copper contact pieces 30 are correspondingly attached to the inner walls 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 correspondingly electrically connected between the copper contact pieces 30.

[0040] The achieved effect is that the hexagonal pipe 7 can guide and limit the sliding of the second copper column 18, the copper rods 28 on the second copper column 18 are connected with the electrically connected holes 27 on the electric contact block 19, so that the electrical connection can be completed, the copper contact pieces 30 are arranged on the guide rod 29, in actual use, the two copper contact pieces 30 are a group, the two ends of each indicator light 6 are correspondingly connected with each group of two copper contact pieces 30, so that when the outer surfaces of each group of two copper contact pieces 30 are attached to the inner walls of the guide groove 32, the corresponding indicator light 6 can be turned on and emit light when the guide rod 29 slides into the guide groove 32, so that the number of indicator lights 6 emitting light can convey the working state of the electric induction mechanism to people, the traction spring 31 is fixed between one end of the guide rod 29 and the inner bottom surface of the guide groove 32, and the traction spring 31 can make the second copper column 18 and the electric contact block 19 more closely connected.

[0041] As shown in Figure 4 ,Figure 6 and Figure 9 As shown in the figure, the constraint assembly comprises a plurality of spring clamping blocks 36, the connecting position of the second copper column 18 and the hexagonal tube 7 is provided with a plurality of installation grooves 37 equidistantly in the circumferential direction, one end of each of the plurality of spring clamping blocks 36 is fixed on the inner wall of one side of the installation groove 37, one side of each of the plurality of spring clamping blocks 36 extends to the inside of the annular constraint groove 23, and one side of each of the plurality of spring clamping blocks 36 is arc-shaped.

[0042] The achieved effect is that, in the process of pushing the constraint sleeve 22 to one side of the adjusting groove 17, the inclined surface of the inner wall of one side of the annular constraint groove 23 and the arc surface of one side of the spring clamping block 36 are mutually fitted, so that the spring clamping block 36 is extruded to the inside of the hexagonal tube 7, thereby clamping and limiting the wire harness inside the hexagonal tube 7.

[0043] Working principle: when using the device, first insert one end of the wire harness into the inside of the hexagonal tube 7, so that one end of the wire harness is in butt joint with the electrical connection hole 27 on the second copper column 18, and when the second copper column 18 is in butt joint with the electrical contact block 19, pull it by the elastic tension of the traction spring 31, so as to ensure the stability of the butt joint, by arranging two arc bimetallic strips 14 in the circuit, when the current is large, the arc bimetallic strip 14 generates a large amount of heat, thereby deforming, when the arc bimetallic strip 14 is elastically deformed, it can only push the connecting disc 35 to one side, when the connecting disc 35 slides, it will drive the constraint sleeve 22 to slide through the push rod 34, in the process of sliding the constraint sleeve 22, when the annular constraint groove 23 is in contact with the plurality of spring clamping blocks 36, the inclined surface of the inner wall of one side of the annular constraint groove 23 and the arc surface of one side of the spring clamping block 36 are mutually fitted, so that the spring clamping block 36 is extruded to the inside of the hexagonal tube 7, thereby clamping and limiting the wire harness inside the hexagonal tube 7, at this time, when the constraint sleeve 22 continues to slide to one side of the adjusting groove 17, the plurality of copper rods 28 will slide out of the inside of the electrical connection hole 27, thereby cutting off the circuit, and the guide rod 29 will also slide out of the inside of the guide groove 32, when sliding out, the outer surface of each group of two copper contact pieces 30 gradually separates from the inner wall of the guide groove 32, at this time, the indicator lamp 6 is extinguished in turn, people can observe the state of the indicator lamp 6 to obtain 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 are mutually communicated, at this time, the gas will enter the inside of the first annular cavity 16 from the side branch pipe 9, then enter the inside of 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 joint cavity 2 inside through the drainage hole 26 on the second annular cavity 24 for cooling.

[0044] Although the present application has been described in detail with reference to the foregoing embodiments, the technical solutions recorded in the foregoing embodiments can be modified, or some of the technical features can be replaced by equivalent features, by those skilled in the art, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

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 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 joint cavity (2), and the outer surface of the electric connection block (19) is provided with four through-holes (33) extending to both ends at equal intervals along the circumferential direction, a guide groove (32) is provided in the middle of one side of the electric connection block (19), and a socket (8) is provided on the other side of the lap joint cavity (2), and the socket (8) extends to the outside of the insulating box (1). A first copper column (10) is fixed between the inner walls of the jack (8) near the inner edge of the lap cavity (2), the electric induction mechanism includes a constraint sleeve (22), the side wall of the constraint sleeve (22) is provided with a cooling component, 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, and the inner walls of the four through-holes (33) are all slidably connected with Push rods (34), one end of each of the four push rods (34) is correspondingly fixed to one side of the constraint sleeve (22), the other ends of each 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), a copper block (11) is fixed to one side of the connecting plate (35) and one end of the first copper column (10), two bayonet holes (12) are provided on the top of each of the two copper blocks (11) near one side edge, and a bayonet rod (11) is fixed between the inner walls of both sides of the bayonet holes (12). 3) The two bayonet holes (12) located on the same side of the two copper blocks (11) form a group, and two arc-shaped bimetallic strips (14) are provided inside the adjustment slot (17), and copper plates (20) are fixed at both ends of the two arc-shaped bimetallic strips (14), and a plurality of the copper plates (20) are provided with a limiting opening (15) at the bottom, and the plurality of the copper plates (20) are correspondingly engaged with the inside of the bayonet holes (12), and 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; The cooling assembly includes a first annular cavity (16), the first annular cavity (16) is opened inside the insulating box (1), and the first annular cavity (16) is located outside the adjustment groove (17), a plurality of through holes (21) penetrating into the adjustment groove (17) are opened on the inner wall of one side of the first annular cavity (16) at equal intervals along the circumferential direction, and the through holes (21) are equidistantly opened, the through holes (21) are equidistantly opened, and the through holes (21) are equidistantly opened along the circumferential direction, a side branch pipe (9) is fixed on 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), and the constraint sleeve (22) A second annular cavity (24) is provided on the side wall of the second annular cavity (24), and a plurality of side openings (25) extending to the outside are provided on the inner wall of one side of the second annular cavity (24) at equal intervals along the circumferential direction. The plurality of side openings (25) are relatively connected to the through hole (21), and a drainage hole (26) is provided inside each of the four push rods (34). One end of each of the four drainage holes (26) extends through the inside of the second annular cavity (24), and the other end of each of the four drainage holes (26) extends through one side of the connecting plate (35).

2. The power-on detection device for wiring harness testing according to claim 1, characterized in that: 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), a hexagonal tube (7) is fixed to one end of the second copper column (18), one end of the hexagonal tube (7) slides and extends to the outside of the insulating box (1), and a plurality of electrical connection holes (27) are equidistantly provided at one end of the second copper column (18) and one end of the electrical connection block (19).

3. The power-on detection device for wiring harness testing according to claim 2, 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).

4. The power-on detection device for wiring harness testing according to claim 3, 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 one side edge, and the plurality of indicator lights (6) are correspondingly electrically connected to the copper contacts (30).

5. The power-on detection device for wiring harness testing according to claim 4, characterized in that: 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 each 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 each of the plurality of spring clamps (36) extends to 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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