A kind of elbow wire harness assembly process system and its elbow wire harness

Abstract

The application discloses a kind of elbow harness assembly process systems and its elbow harness, including harness, one end of harness is elbow terminal inner core, and elbow terminal inner core is provided with terminal insulating shell and fixed back cover outside;Elbow terminal inner core includes vertically connected elbow a section and elbow b section, and elbow b section is consistent with the extension direction of harness and is connected with the end of harness, and terminal insulating shell includes integrally vertically communicated connecting insulating cylinder and rectangular insulating shell body, and the tail end of rectangular insulating shell body and the side away from insulating cylinder are both provided with open mouth, so that rectangular clamping slot is formed in rectangular insulating shell body;Insulating cylinder is sleeved outside elbow a section;Elbow b section is clamped in rectangular clamping slot in rectangular insulating shell body along length direction;The cooperation of the package body of the application and hard arc piece can effectively protect the connecting part of harness and elbow terminal inner core.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of wire harness. BACKGROUND

[0002] The connection between the end of the automobile wire harness and the wire harness elbow is a relatively weak part of the wire harness. In order to achieve stable connection between the wire harness terminal and the end of the wire harness, a wire harness terminal crimping process is generally used to crimp the metal part into a ring-shaped tight clamping on the end of the wire harness, so as to achieve the purpose of stable connection. The existing crimping clamping method at the connection between the terminal and the wire harness has certain disadvantages, such as Figure 7 As shown in the figure, one is that the clamping cannot be closed during the crimping clamping process, and the other is that excessive crimping during the clamping process causes the end of the wire harness to be pierced. SUMMARY

[0003] The present application provides a kind of elbow wire harness assembly process system and its elbow wire harness, the cooperation of the clamping body and the hard arc piece of the present application can effectively protect the connection part between the wire harness and the inner core of the elbow terminal.

[0004] Technical scheme: To achieve the above-mentioned purpose, an elbow wire harness of the present application comprises a wire harness, one end of the wire harness being an elbow terminal inner core, the elbow terminal inner core being provided with a terminal insulating shell and a fixed rear cover outside;

[0005] The elbow terminal inner core comprises a vertically connected elbow a section and an elbow b section, the elbow b section being consistent with the extension direction of the wire harness and connecting the end of the wire harness, the terminal insulating shell comprising an integrally vertically connected insulating cylinder and a rectangular insulating shell, the tail end of the rectangular insulating shell and the side away from the insulating cylinder are both provided with an open port, so that a rectangular clamping groove is formed in the rectangular insulating shell; the insulating cylinder is sleeved outside the elbow a section; the elbow b section is clamped in the rectangular clamping groove in the rectangular insulating shell along the length direction.

[0006] Further, the rectangular insulating shell is fixedly connected with a hard arc piece extending along the length direction of the wire harness at the tail end close to the insulating cylinder, and the concave arc surface of the hard arc piece is attached to the outer arc surface of the wire harness.

[0007] Further, after the elbow b section is clamped in the rectangular clamping groove, a rear cover clamping groove is formed in the rectangular clamping groove on the side of the elbow b section away from the elbow a section.

[0008] Further, the fixed rear cover comprises a strip-shaped rectangular metal rear cover, the front part of the rectangular metal rear cover is embedded in the rear cover clamping groove, the tail part of the strip-shaped rectangular metal rear cover is vertically and integrally connected with the first clamping piece and the second clamping piece on both sides in a symmetrical manner, the wire harness end is clamped between the first clamping piece and the second clamping piece, and the free ends of the first clamping piece and the second clamping piece are bent towards the side close to each other in the assembled state and tightly clamp the wire harness end to form a clamping body in a closed loop shape tightly clamping the wire harness end, and the end splicing parts of the first clamping piece and the second clamping piece of the clamping body are tightly fitted with the outer arc surface of the hard arc-shaped piece.

[0009] Further, an assembling process of the elbow wire harness comprises the following steps.

[0010] Step one, prepare the wire harness with the elbow terminal inner core, the terminal insulating shell, the fixed rear cover and the rear cover clamping device;

[0011] Step two, wrap the insulating cylinder on the outer part of the elbow a section, and clamp the elbow b section in the rectangular clamping groove in the rectangular insulating shell in the length direction, at this time, the concave arc surface of the hard arc-shaped piece is fitted with the outer arc surface of the wire harness; in the rectangular clamping groove, the side of the elbow b section away from the elbow a section forms the rear cover clamping groove;

[0012] Step three, embed the front part of the rectangular metal rear cover in the rear cover clamping groove, and clamp the wire harness end between the first clamping piece and the second clamping piece; at this time, the preliminary splicing of the elbow terminal inner core, the terminal insulating shell and the fixed rear cover is completed;

[0013] The preliminary splicing of the three of the terminal insulating shell and the fixed rear cover, at this time, the combined structure of the elbow terminal inner core, the terminal insulating shell and the fixed rear cover is still a loose structure;

[0014] Step four, bend the free ends of the first clamping piece and the second clamping piece towards the side close to each other by the rear cover clamping device and tightly clamp the wire harness end to form a clamping body in a closed loop shape tightly clamping the wire harness end, and make the end splicing parts of the first clamping piece and the second clamping piece of the clamping body tightly fitted with the outer arc surface of the hard arc-shaped piece; thereby obtain the wire harness elbow with stable structure.

[0015] Further, the rear cover clamping device of the assembling process of the elbow wire harness: the rear cover clamping device comprises an a rotating shaft driven by a driving device, the a rotating shaft end is fixedly installed with an extender in the length direction, the extender end has a telescopic push rod capable of telescopic movement; the lower side of the extender shell is fixed with a connecting arm extending downward in the initial state, the connecting arm end is vertically fixed with a horizontal sliding table, the upper side of the end of the horizontal sliding table away from the connecting arm is vertically connected with a cylinder clamping seat, the distance between the cylinder clamping seat and the connecting arm is greater than the outer diameter size of the insulating cylinder; the side close to the connecting arm of the cylinder clamping seat is provided with an arc-shaped concave clamping opening, the inner contour of the arc-shaped concave clamping opening is adapted to the outer contour of the insulating cylinder; the upper part of the cylinder clamping seat is provided with a horizontal limiting strip parallel to the extender, and the horizontal limiting strip is fixedly connected with the extender shell through a synchronous arm.

[0016] Further, the b rotating shaft driven by the driving device is arranged on the side of the barrel holder away from the connecting arm, the axis of the b rotating shaft is parallel to the axis of the a rotating shaft and directly below the axis of the a rotating shaft, the b rotating shaft is vertically fixedly connected with a rocker arm at the end of the b rotating shaft, the rocker arm is vertically connected with a rolling wheel shaft parallel to the b rotating shaft, and the rolling wheel shaft is rotatably installed with a rolling wheel outside through a bearing.

[0017] Further, the assembling structure of the three of the elbow terminal inner core, the terminal insulating shell and the fixed rear cover is in the rear cover clamping device state: the insulating barrel is downward, the lower end of the insulating barrel is in limiting contact with the surface of the horizontal sliding table, the sidewall of the insulating barrel is attached to the inner wall of the arc-shaped recessed clamping hole of the barrel holder, the end of the telescopic push rod is extended and presses the rectangular insulating shell away from the front end of the barrel holder, the lower surface of the horizontal limiting strip is attached to the upper surface of the rectangular metal rear cover along the length direction, the axis of the a rotating shaft is coaxial with the axis of the wire harness end, the b rotating shaft is parallel to the wire harness end below, and the rolling wheel is tangent to the outer side surface of the middle part of the first clamping piece or the second clamping piece.

[0018] When the rolling wheel is tangent to the outer side surface of the middle part of the second clamping piece, if the b rotating shaft is counterclockwise rotated, the rolling wheel is separated from the second clamping piece, and the b rotating shaft continues to rotate to drive the rolling wheel to be tangent to the outer side surface of the middle part of the first clamping piece.

[0019] Beneficial effects: the cooperation of the clamping body and the hard arc-shaped piece can effectively protect the connection part of the wire harness and the elbow terminal inner core, and stably form a closed loop structure wrapping the wire harness end, so that the connection part of the wire harness and the elbow terminal inner core is prevented from being broken under external pulling; meanwhile, the hard arc-shaped piece has a certain constraint effect on the bending process of the first clamping piece and the second clamping piece, so that the first clamping piece and the second clamping piece are prevented from piercing the connection part of the wire harness and the elbow terminal inner core towards the inside. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a schematic diagram of wire harness elbow assembly process;

[0021] Figure 2 It is a schematic diagram of the rear cover clamping device structure;

[0022] Figure 3 It is a schematic diagram of the insulating barrel being arranged between the barrel holder and the connecting arm in the tooling process;

[0023] Figure 4 It is a schematic diagram of the completed tooling;

[0024] Figure 5 It is a schematic diagram of the completed tooling; Figure 4 It is a schematic diagram of the completed tooling;

[0025] Figure 6 A schematic diagram showing the free end of the second clamping piece being bent into a bent section of the clamping piece;

[0026] Figure 7 These are two types of defects in existing crimping methods. Detailed Implementation

[0027] The invention will now be further described with reference to the accompanying drawings.

[0028] As attached Figures 1 to 7 The bent wire harness shown includes a wire harness 13, one end of which is a bent terminal core 5. The bent terminal core 5 is provided with a terminal insulating shell 4 and a fixed back cover 6. The bent terminal core 5 includes a bent a section 9 and a bent b section 8 that are vertically connected. The bent b section 8 extends in the same direction as the wire harness 13 and is connected to the end of the wire harness 13.

[0029] The terminal insulating housing 4 includes an integrally vertically connected insulating cylinder 11 and a rectangular insulating shell 10. Openings are provided at the tail end and on the side away from the insulating cylinder 11 of the rectangular insulating shell 10, forming a rectangular slot 14 inside the rectangular insulating shell 10. The insulating cylinder 11 is fitted over the elbow section a 9. The elbow section b 8 is fitted along its length into the rectangular slot 14 inside the rectangular insulating shell 10. A rigid arc-shaped piece 12 extending along the length of the wire harness 13 is fixedly connected to the tail end of the rectangular insulating shell 10 near the insulating cylinder 11. The concave arc surface of the rigid arc-shaped piece 12 conforms to the outer arc surface of the wire harness 13. The rigid arc-shaped piece 12 is a relatively thick, non-deformable metal structure or a rigid plastic structure. Figure 1Step two: After the elbow section b 8 is installed in the rectangular slot 14, a rear cover slot 14a is formed on the side of the elbow section b 8 away from the elbow section a 9 in the rectangular slot 14. The fixed rear cover 6 includes a rectangular metal rear cover 7. The front part of the rectangular metal rear cover 7 is embedded in the rear cover slot 14a. The tail of the rectangular metal rear cover 7 is symmetrically and vertically connected to the first clamping piece 1a and the second clamping piece 1b. The first clamping piece 1a and the second clamping piece 1b are both thin metal sheets that are easily deformable. The thickness shown in the attached figure is thicker than expected. In reality, they are thinner. The end of the wire harness 13 is clamped between the first clamping piece 1a and the second clamping piece 1b. In the assembled state, the free ends of the first clamping piece 1a and the second clamping piece 1b are bent toward the side that is close to each other and tightly clamp the end of the wire harness 13, forming a closed loop. The clamping body 2 at the end of the tightly wrapped wire harness 13 has its first clamping piece 1a and second clamping piece 1b tightly attached to the outer arc surface of the rigid arc-shaped piece 12. The cooperation between the clamping body 2 and the rigid arc-shaped piece 12 can effectively protect the connection between the wire harness 13 and the inner core 5 of the elbow terminal, and stably form a closed-loop structure that wraps around the end of the wire harness, preventing the connection between the wire harness 13 and the inner core 5 of the elbow terminal from being broken under external force. At the same time, the rigid arc-shaped piece 12 exerts a certain restraining effect on the clamping and bending process of the first clamping piece 1a and the second clamping piece 1b, which can effectively prevent the ends of the first clamping piece 1a and the second clamping piece 1b from piercing the connection between the wire harness 13 and the inner core 5 of the elbow terminal during the bending deformation clamping process.

[0030] like Figure 1 The assembly process for the elbow wire harness shown includes the following steps:

[0031] Step 1: Prepare the wire harness 13 with the bent terminal core 5, the terminal insulating shell 4, the fixed back cover 6, and the back cover clamping device 100.

[0032] Step 2: The insulating cylinder 11 is fitted over the elbow section a 9, and the elbow section b 8 is clamped in the rectangular slot 14 inside the rectangular insulating shell 10 along the length direction. At this time, the concave arc surface of the rigid arc-shaped piece 12 is in contact with the outer arc surface of the wire harness 13. In the rectangular slot 14, the side of the elbow section b 8 away from the elbow section a 9 forms the rear cover slot 14a.

[0033] Step 3: Insert the front part of the rectangular metal back cover 7 into the back cover slot 14a, and clamp the end of the wire harness 13 between the first clamping piece 1a and the second clamping piece 1b; at this point, the connection of the elbow terminal inner core 5 is complete.

[0034] The initial assembly of the terminal insulating shell 4 and the fixed back cover 6 is underway. At this time, the combined structure of the elbow terminal inner core 5, the terminal insulating shell 4 and the fixed back cover 6 is still a loose structure.

[0035] Step four: The free ends of the first clamping piece 1a and the second clamping piece 1b are bent toward each other and tightly clamped to the end of the wire harness 13 by the back cover clamping device 100, forming a closed-loop clamping body 2 that tightly clamps the end of the wire harness 13. The splicing points of the ends of the first clamping piece 1a and the second clamping piece 1b of the clamping body 2 are tightly attached to the outer arc surface of the rigid arc-shaped piece 12. The rigid arc-shaped piece 12 exerts a certain constraint on the clamping and bending process of the first clamping piece 1a and the second clamping piece 1b, which can effectively prevent the ends of the first clamping piece 1a and the second clamping piece 1b from piercing the connection between the wire harness 13 and the inner core 5 of the elbow terminal during the bending deformation clamping process; thus, a wire harness elbow 3 with stable structure and performance is obtained.

[0036] like Figure 2 The rear cover clamping device 100 in "Step Four" above includes an a-rotating shaft 20 that can be driven by a driving device. An expansion joint 21 is fixedly installed at the end of the a-rotating shaft 20 along the length direction. The expansion joint 21 has a telescopic push rod 23 at the end that can perform telescopic movement. A connecting arm 19 that initially extends downward is fixed on the lower side of the housing of the expansion joint 21. A horizontal slide 18 is vertically fixed at the end of the connecting arm 19. A cylinder holder 17 is vertically connected to the upper side of the end of the horizontal slide 18 away from the connecting arm 19. The distance between the cylinder holder 17 and the connecting arm 19 is greater than the outer diameter of the insulating cylinder 11. An arc-shaped concave notch 24 is provided on the side of the cylinder holder 17 near the connecting arm 19. The inner contour of the arc-shaped concave notch 24 is adapted to the outer contour of the insulating cylinder 11.

[0037] A horizontal limiting bar 25 parallel to the telescopic device 21 is provided above the cylinder holder 17. The horizontal limiting bar 25 is fixedly connected to the housing of the telescopic device 21 through the synchronous arm 22. A b-shaft 16 that can be driven by a driving device is provided on the side of the cylinder holder 17 away from the connecting arm 19. The axis of the b-shaft 16 is parallel to the axis of the a-shaft 20 directly below it. A rocker arm 15 is vertically fixedly connected to the end of the b-shaft 16. A rolling roller shaft 27 parallel to the b-shaft 16 is vertically connected to the end of the rocker arm 15. A rolling roller 26 is rotatably mounted on the outside of the rolling roller shaft 27 through a bearing. The axial dimension of the rolling roller 26 is the same as the width dimension of the first clamping piece 1a and the second clamping piece 1b.

[0038] The assembly structure of the elbow terminal inner core 5, the terminal insulating shell 4, and the fixed rear cover 6 is in the state of the rear cover clamping device 100: the insulating cylinder 11 faces downward, and the lower end of the insulating cylinder 11 is in contact with the surface of the horizontal slide table 18; the side wall of the insulating cylinder 11 is attached to the inner wall of the arc-shaped concave slot 24 of the cylinder holder 17; the end of the telescopic push rod 23 extends out and presses the rectangular insulating shell 10 away from the front end of the cylinder holder 17; the lower surface of the horizontal limiting strip 25 is attached to the upper surface of the rectangular metal rear cover 7 along the length direction; a. rotating shaft 2 The axis of 0 is coaxial with the axis of the end of the wire harness 13, and the b-shaft 16 is parallel to the lower part of the end of the wire harness 13; the rolling roller 26 is tangent to the outer side of the middle height of the first clamping piece 1a or the second clamping piece 1b; when the rolling roller 26 is just tangent to the outer side of the middle height of the second clamping piece 1b, if the b-shaft 16 is rotated counterclockwise, the rolling roller 26 will disengage from the second clamping piece 1b, and the b-shaft 16 will continue to rotate, which will drive the rolling roller 26 to move until it is tangent to the outer side of the middle height of the first clamping piece 1a.

[0039] The tooling method and working principle of the rear cover clamping device in the assembly process of the elbow wire harness:

[0040] First, assemble the inner core 5 of the bent terminal at the end of the wire harness 13, the terminal insulating shell 4, and the fixing back cover 6 according to "Step 1" to "Step 3". Then, with the insulating shell 4 of the assembled structure facing downwards, place the insulating shell 11 between the shell holder 17 and the connecting arm 19. Figure 3 As shown, finally, the end of the telescopic push rod 23 extends, and the telescopic push rod 23 pushes the assembled structure consisting of the elbow terminal inner core 5, the terminal insulating shell 4, and the fixed rear cover 6 along the length direction until the insulating cylinder 11 of the terminal insulating shell 4 moves to the inner wall of the arc-shaped concave slot 24 of the side wall fitting cylinder seat 17, as shown. Figure 4 As shown, the assembly structure consisting of the elbow terminal inner core 5, the terminal insulating shell 4, and the fixed back cover 6 is now positioned as a whole and synchronized with the a rotating shaft 20. At this time, the rolling roller 26 is just tangent to the outer side at the middle height of the second clamping piece 1b.

[0041] A tight and non-destructive clamping process based on tooling:

[0042] like Figure 5From the axial perspective shown, let the axis of shaft a 20 be denoted as axis a 28, and the axis of shaft b 16 be denoted as axis b 29. Assuming the position of the rolling roller 26 remains fixed, the driving device drives shaft a 20 to rotate clockwise, causing the assembled structure consisting of the elbow terminal inner core 5, the terminal insulating shell 4, and the fixed rear cover 6 to slowly rotate clockwise around axis a 28. From the perspective of relative motion, the rolling roller 26 will relatively roll and constrain the second clamping piece 1b along a strict circular arc path, causing a section of the second clamping piece 1b near its free end to move along a specific and strict circular arc path towards... One side of the wire harness 13 is bent, ultimately forming the bent section 30 of the clamping piece. Due to deviations in size and process, the contour shape and relative position of the rigid arc-shaped piece 12 will inevitably have certain deviations, leading to two potential unfavorable situations for the final bent section 30 of the clamping piece. The first situation is that the bent section 30 of the clamping piece does not fit tightly against the rigid arc-shaped piece 12, resulting in looseness after assembly. The second situation is that the target contour of the bent section 30 of the clamping piece interferes with the outer contour of the rigid arc-shaped piece 12, causing the rigid arc-shaped piece 12 to break during the clamping process. The following is the optimized method:

[0043] While the drive device drives the a-shaft 20 to rotate clockwise, the drive device applies a clockwise torque to the b-shaft 16. This torque is transmitted to the rolling roller 26 through the rocker arm 15, thereby causing the rolling roller 26 to exert a consistently stable rolling force on the second clamping piece 1b. By controlling the magnitude of the clockwise torque applied by the drive device to the b-shaft 16, the rolling force is sufficient to bend the second clamping piece 1b but not enough to crush the hard arc-shaped piece 12. During the clockwise rotation of the a-shaft 20 by the drive device, the rolling roller 26 moves relative to the hard arc-shaped piece 12. The outer contour of the sheet 12 is rolled to constrain the second clamping sheet 1b, causing a section of the second clamping sheet 1b near the free end to bend towards the side closer to the wire harness 13, ultimately forming a bent section 30 of the clamping sheet that closely fits the outer contour of the rigid arc-shaped sheet 12 without being crushed; this completes the bending and clamping process of the second clamping sheet 1b; finally, the a rotating shaft 20 is driven to rotate counterclockwise to the initial state, so that the assembly structure composed of the inner core 5 of the bent terminal, the insulating shell 4 of the terminal, and the fixed back cover 6 returns to the initial state, and then the first clamping sheet 1a needs to be bent and clamped;

[0044] Rotate shaft 16 counterclockwise to make rocker arm 15 drive rolling wheel 26 to move to tangent to the outer side of the first clamping piece 1a at the middle height; then bend and clamp the first clamping piece 1a in accordance with the bending and clamping process of the second clamping piece 1b.

[0045] The free ends of the first clamping piece 1a and the second clamping piece 1b are bent toward each other and tightly clamp the end of the wire harness 13, forming a closed-loop clamping body 2 that tightly clamps the end of the wire harness 13. The splice of the ends of the first clamping piece 1a and the second clamping piece 1b of the clamping body 2 are tightly attached to the outer arc surface of the rigid arc plate 12; thus, a wire harness bend 3 with a stable structure and no damage to the rigid arc plate 12 is obtained.

[0046] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A back cover clamping device for a bend harness assembly process, characterized by: The elbow wire harness comprises a wire harness (13), one end of the wire harness (13) being an elbow terminal inner core (5), the elbow terminal inner core (5) being externally provided with a terminal insulating shell (4) and a fixed rear cover (6); The elbow terminal inner core (5) comprises a vertically connected elbow a section (9) and an elbow b section (8), the elbow b section (8) being consistent with the extension direction of the wire harness (13) and being connected to the end of the wire harness (13), the terminal insulating shell (4) comprising an integrally vertically connected insulating cylinder (11) and a rectangular insulating shell (10), the tail end of the rectangular insulating shell (10) and the side away from the insulating cylinder (11) being provided with open ports, so that a rectangular clamping groove (14) is formed in the rectangular insulating shell (10); the insulating cylinder (11) is sleeved on the outside of the elbow a section (9); the elbow b section (8) is clamped in the rectangular clamping groove (14) in the rectangular insulating shell (10) along the length direction; The rectangular insulating shell (10) is fixedly connected with a hard arc-shaped sheet (12) extending along the length direction of the wire harness (13) at the tail end close to the insulating cylinder (11), the concave arc surface of the hard arc-shaped sheet (12) being attached to the outer arc surface of the wire harness (13); After the elbow b section (8) is clamped in the rectangular clamping groove (14), a rear cover clamping groove (14a) is formed on the side of the elbow b section (8) away from the elbow a section (9) in the rectangular clamping groove (14); The fixed rear cover (6) comprises a strip-shaped rectangular metal rear cover (7), the front part of the rectangular metal rear cover (7) being clamped in the rear cover clamping groove (14a), the tail part of the strip-shaped rectangular metal rear cover (7) being symmetrically and vertically integrally connected with a first clamping sheet (1a) and a second clamping sheet (1b), the end of the wire harness (13) being clamped between the first clamping sheet (1a) and the second clamping sheet (1b), and the free ends of the first clamping sheet (1a) and the second clamping sheet (1b) being bent towards each other and tightly clamping the end of the wire harness (13) in the assembled state, forming a clamping body (2) in the form of a closed loop tightly clamping the end of the wire harness (13), the end joint of the first clamping sheet (1a) and the second clamping sheet (1b) of the clamping body (2) being tightly attached to the outer arc surface of the hard arc-shaped sheet (12); The assembly process of the elbow wire harness comprises the following steps: Step one, preparing the wire harness (13) with the elbow terminal inner core (5), the terminal insulating shell (4), the fixed rear cover (6) and the rear cover clamping device (100); Step two, sleeving the insulating cylinder (11) on the outside of the elbow a section (9) and clamping the elbow b section (8) in the rectangular clamping groove (14) in the rectangular insulating shell (10) along the length direction, at this time, the concave arc surface of the hard arc-shaped sheet (12) is attached to the outer arc surface of the wire harness (13); in the rectangular clamping groove (14), the rear cover clamping groove (14a) is formed on the side of the elbow b section (8) away from the elbow a section (9); Step three, clamping the front part of the rectangular metal rear cover (7) in the rear cover clamping groove (14a) and clamping the end of the wire harness (13) between the first clamping sheet (1a) and the second clamping sheet (1b); at this time, the assembly of the elbow terminal inner core (5) The preliminary assembly of the terminal insulating shell (4) and the fixed rear cover (6), at this time, the combined structure of the elbow terminal inner core (5), the terminal insulating shell (4) and the fixed rear cover (6) is still a loose structure; Step four, the free ends of the first clamping piece (1a) and the second clamping piece (1b) are bent towards each other by the rear cover clamping device (100) and tightly clamp the wire harness (13) end, forming a clamping body (2) that tightly clamps the wire harness (13) end in a closed loop, so that the end joint of the first clamping piece (1a) and the second clamping piece (1b) of the clamping body (2) is tightly attached to the outer arc surface of the hard arc-shaped piece (12); thereby obtaining a wire harness elbow (3) with stable structure; The rear cover clamping device (100) includes an a rotating shaft (20) that can be driven by a driving device, the a rotating shaft (20) has an extender (21) fixedly installed at the end thereof along the length direction, and the extender (21) has a telescopic push rod (23) capable of telescopic movement at the end thereof; the lower side of the shell of the extender (21) is fixedly connected with a connecting arm (19) extending downward in the initial state, the end of the connecting arm (19) is fixedly connected with a horizontal sliding table (18) vertically, the upper side of the end of the horizontal sliding table (18) away from the connecting arm (19) is connected with a cylinder clamping seat (17) vertically, and the distance between the cylinder clamping seat (17) and the connecting arm (19) is greater than the outer diameter dimension of the insulating cylinder (11); the side of the cylinder clamping seat (17) close to the connecting arm (19) is provided with an arc-shaped concave clamping opening (24), the inner contour of the arc-shaped concave clamping opening (24) is adapted to the outer contour of the insulating cylinder (11); the upper side of the cylinder clamping seat (17) is provided with a horizontal limiting strip (25) parallel to the extender (21), and the horizontal limiting strip (25) is fixedly connected with the shell of the extender (21) through a synchronous arm (22); The side of the cylinder clamping seat (17) away from the connecting arm (19) is provided with a b rotating shaft (16) capable of being driven by a driving device, the axis of the b rotating shaft (16) is parallel to the axis of the a rotating shaft (20) directly below; the end of the b rotating shaft (16) is fixedly connected with a rocker arm (15) vertically, and the end of the rocker arm (15) is connected with a rolling wheel shaft (27) parallel to the b rotating shaft (16) vertically, and the rolling wheel shaft (27) is rotatably installed with a rolling wheel (26) outside through a bearing.

2. A back cover clamping device for a hump harness assembly process according to claim 1, characterized in that: The assembling structure tooling of the elbow terminal inner core (5), the terminal insulating shell (4) and the fixed rear cover (6) is in the rear cover clamping device (100) state: the insulating cylinder (11) faces downward, and the lower end of the insulating cylinder (11) is limited to contact the surface of the horizontal sliding table (18), the side wall of the insulating cylinder (11) is attached to the inner wall of the arc-shaped recessed clamping opening (24) of the cylinder clamping seat (17), the end of the telescopic push rod (23) extends and presses the rectangular insulating shell (10) away from the front end of the cylinder clamping seat (17), the lower surface of the horizontal limiting strip (25) is attached to the upper surface of the rectangular metal rear cover (7) along the length direction, the axis of the a rotating shaft (20) is coaxial with the axis of the end of the wire harness (13), and the b rotating shaft (16) is parallel to the lower end of the wire harness (13); the rolling wheel (26) is tangent to the outer side surface at the middle height of the first clamping piece (1a) or the second clamping piece (1b); When the rolling wheel (26) is tangent to the outer side surface at the middle height of the second clamping piece (1b), if the b rotating shaft (16) is counterclockwise rotated, the rolling wheel (26) is separated from the second clamping piece (1b), and the b rotating shaft (16) continues to rotate to drive the rolling wheel (26) to move to be tangent to the outer side surface at the middle height of the first clamping piece (1a).

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