Wire harness terminal crimping and preloading apparatus

Abstract

The utility model relates to the technical field of wire harness terminal crimping, and concretely provides a wire harness terminal crimping pre-tightening equipment, the wire harness terminal crimping pre-tightening equipment is used for the pretreatment of each core wire of wire harness end, and the wire harness terminal crimping pre-tightening equipment includes base, and is located on the rotating tightening mechanism and core wire clamping mechanism of base, the core wire clamping mechanism includes the first jaw that can be controlled and opens and shuts, under the condition that each core wire of wire harness end is transferred to the first jaw of opening, the first jaw that is controlled and closes can compress tightly each core wire, the rotating tightening mechanism can drive the first jaw to rotate with the axis of wire harness as the shaft to compress tightly each core wire in the first jaw together, the wire harness terminal crimping pre-tightening equipment of the utility model, through setting up rotating tightening mechanism and core wire clamping mechanism, the pre-tightening treatment before merging crimping of each core wire of wire harness end is carried out, this reduces the situation that the core wire of wire harness end appears to scatter when carrying out terminal crimping.

Description

Technical Field

[0001] This utility model relates to the field of wire harness terminal crimping technology, and in particular to a wire harness terminal crimping pre-tightening device. Background Technology

[0002] In the electrical wiring systems of automobiles, equipment, etc., there are situations where multiple lines need to be grounded. This requires a grounding terminal to crimp the ends of multiple conductors together. This is an important part of the automotive wiring harness manufacturing process, which involves using a specialized terminal crimping die to crimp multiple conductors together onto a single grounding terminal.

[0003] Because multiple wires are being crimped together, the clamping claws need to hold multiple wires simultaneously during the crimping process. When using a mechanical gripper to automatically crimp the core wires at their ends, assuming no interference from the mechanical components during crimping, the ends of the core wires on one side of the clamping area may naturally spread out. This results in the grounding terminal being unable to completely gather and crimp the core wires together during the crimping process, leading to some core wires remaining outside the terminal crimping area. This is a serious quality issue that can cause short circuits in the wiring harness circuit and even lead to fires.

[0004] Given the aforementioned issues, current automotive wiring harness installation processes cannot automate the crimping of multiple wires to grounding terminals; the crimping operation is always performed manually. Manually crimping multiple wires to grounding terminals requires sequentially producing, storing, and transferring individual wires according to process requirements, followed by manual crimping of the multiple wires and their end cores. This process is complex, time-consuming, has low processing accuracy, poor product consistency, low production efficiency, and requires a large number of personnel. Utility Model Content

[0005] In view of this, the present invention aims to provide a wire harness terminal crimping pre-tightening device to reduce the situation where the core wires at the end of the wire harness separate during terminal crimping, thereby creating favorable conditions for the combined crimping of each core wire.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A wire harness terminal crimping pre-tightening device is used for pre-processing each core wire at the end of the wire harness. The wire harness terminal crimping pre-tightening device includes a base, and a rotating tightening mechanism and a core wire clamping mechanism disposed on the base.

[0008] The core wire clamping mechanism includes a first clamp that can be manipulated to open and close. When each of the core wires at the end of the wire harness is transferred into the open first clamp, the first clamp that is manipulated to close can press each of the core wires together. The rotary tightening mechanism can drive the first clamp to rotate about the axis of the wire harness to tighten each of the core wires in the first clamp together.

[0009] Furthermore, the core wire clamping mechanism also includes a jaw fixing frame disposed on the rotary tightening mechanism, a first driving cylinder disposed on the base, and a transmission mechanism; the two jaws of the first jaw are movably disposed on the jaw fixing frame, and the first driving cylinder drives the two jaws to approach or move away through the transmission mechanism to realize the closing or opening action of the first jaw; the rotary tightening mechanism drives the first jaw to rotate about the axis of the wire harness through the jaw fixing frame.

[0010] Furthermore, the transmission mechanism includes a swing arm corresponding to the two claw bodies. The swing arm is mounted on the gripper fixing frame via a swing shaft. The swing shaft is located at the middle position of the swing arm. The two ends of the swing arm are respectively connected to the first driving cylinder and the claw body. The swing arm is driven to swing by the first driving cylinder to move the corresponding claw body.

[0011] Furthermore, the claw body is slidably mounted on the gripper fixing frame, and the pin hole of the claw body for hinged to the swing arm is an elongated hole, in which the pivot pin can move its position as the swing arm swings.

[0012] Furthermore, the transmission mechanism also includes a front connecting block corresponding to the two swing arms, and an annular connector driven by the first driving cylinder to move along the axial direction of the wire harness; the front connecting block is guided along the axial direction of the wire harness on the gripper fixing frame, and the annular connector is provided with a groove arranged around the axis of the wire harness; one end of the front connecting block is hooked in the groove, and the other end is hinged to the swing arm; during the rotation of the front connecting block with the gripper fixing frame, the hooked end of the front connecting block slides in the groove.

[0013] Furthermore, the rotary tightening mechanism includes a first drive motor mounted on the base, a tightening shaft for driving the first gripper to rotate, and a first transmission unit disposed between the first drive motor and the tightening shaft.

[0014] Furthermore, the first transmission unit includes a first driving pulley disposed on the power output shaft of the first drive motor, a first driven pulley disposed on the tightening shaft, and a first transmission belt disposed between the first driving pulley and the first driven pulley.

[0015] Furthermore, it also includes a wire fixing mechanism disposed on the base, the wire fixing mechanism having a second clamp that can be controlled to open and close; the second clamp is disposed corresponding to the first clamp, the open second clamp can accept the insertion of a set number of wires, and the controlled closed second clamp can press each wire into the wire bundle, and place each core wire at the end of the wire bundle in the open first clamp.

[0016] Furthermore, it also includes a wire transfer mechanism disposed on the base, the wire transfer mechanism including a third gripper that can be manipulated to open and close, and a drive unit for driving the third gripper to reciprocate; as the third gripper opens, closes and reciprocates, the third gripper can move the wire into the open second gripper.

[0017] Furthermore, the base is provided with a slide rail, and the third gripper is slidably mounted on the slide rail via a movable slider; the drive unit includes a second drive motor and a second transmission belt that reciprocates under the drive of the second drive motor; the movable slider is connected to the second transmission belt and reciprocates on the slide rail as the second transmission belt moves.

[0018] Compared with the prior art, this utility model has the following advantages:

[0019] (1) The wire harness terminal crimping pre-tightening device of this utility model pre-tightens each core wire at the end of the wire harness before merging and crimping by setting a rotary tightening mechanism and a core wire clamping mechanism. First, the first claw in the core wire clamping mechanism is used to press each core wire together. Then, the rotary tightening mechanism is used to tighten each core wire into one piece. In this way, when the end of the wire harness is placed in the crimping area of ​​the terminal for terminal crimping, the clamping of the wire harness is less likely to cause the core wires to spread out naturally. This reduces the situation where the core wires at the end of the wire harness spread out when crimping the terminal, thus creating good conditions for merging and crimping each core wire.

[0020] (2) The first driving cylinder drives the two claws of the first gripper to the gripper fixing frame, which can realize the opening and closing action of the first gripper. The first driving cylinder has the characteristics of timely action and easy control, and the purchase cost is low, which helps to reduce the overall cost of equipment manufacturing.

[0021] (3) By synchronously driving the two rocker arms to swing through the first driving cylinder, the two claws of the first gripper are driven. This can simply and efficiently transform the linear drive of the first driving cylinder into the symmetrical movement of the two claws, thereby efficiently driving the opening and closing action of the first gripper.

[0022] (4) The two claws are guided and slidably set on the claw fixing frame. At the same time, the pin hole on the claw is designed as a long hole, which can effectively overcome the deviation between the moving path of the swing arm end and the guiding moving direction of the claw.

[0023] (5) A front connecting block and an annular connector are set in the transmission mechanism. The annular groove on the annular connector allows the gripper fixing frame to rotate relative to the annular connector with the swing arm and the front connecting block. This greatly reduces the rotational load of the rotary tightening mechanism and the difficulty of setting up the transmission mechanism.

[0024] (6) The rotary tightening mechanism is driven by a motor, which has the advantage of easy and precise control. The rotary drive action of the first drive motor can well meet the rotary drive requirements of the rotary tightening mechanism for the first gripper.

[0025] (7) The first drive motor and the tightening shaft are driven by a belt. By configuring the first drive wheel and the first driven wheel with reasonable diameter, a suitable transmission ratio can be obtained. Moreover, since the first drive belt can provide flexible transmission distance, it is convenient to arrange the first drive motor and the tightening shaft flexibly.

[0026] (8) By setting a wire fixing mechanism on the base, multiple wires can be pressed into a wire bundle, and a stable clamping and fixing of the wire bundle can be formed. With the rotation drive of the rotating tightening mechanism and the clamping of the first jaw, the merging and spiral winding of the core wires at the end of the wire bundle can be completed smoothly, so that the core wires are tightened together.

[0027] (9) By configuring a wire transfer mechanism for the equipment, the wires can be transferred one by one to the wire fixing mechanism by using the reciprocating third gripper on the wire transfer mechanism, thereby quickly completing the merging of multiple wires and forming a wire harness that requires terminal crimping.

[0028] (10) By setting a slide rail on the base, the second drive motor drives the second transmission belt to reciprocate, thereby driving the moving slider to move on the slide rail, and can carry the third gripper to perform transfer action. Attached Figure Description

[0029] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model. The directional terms such as front / back, up / down, etc., used therein are only used to indicate relative positional relationships and do not constitute an improper limitation of this utility model. In the drawings:

[0030] Figure 1 This is a schematic diagram of the overall structure of the wire harness terminal crimping and pre-tightening device described in this embodiment of the utility model;

[0031] Figure 2 This is a front view of the wire harness terminal crimping pre-tightening device described in an embodiment of the present invention;

[0032] Figure 3 This is a schematic diagram of the core wire clamping mechanism and the rotary tightening mechanism described in the embodiment of this utility model;

[0033] Figure 4 for Figure 3 A schematic diagram of the structure of each component shown with the bearing housing removed;

[0034] Figure 5 for Figure 4 A schematic diagram of the structure of each component behind the hidden gripper fixing frame;

[0035] Figure 6 for Figure 3 The diagram shows the structure of the entire core wire clamping mechanism after removing the gripper fixing frame;

[0036] Figure 7 This is a three-dimensional structural diagram of the wire fixing mechanism described in an embodiment of the present utility model;

[0037] Figure 8 This is a three-dimensional structural diagram of the wire transfer mechanism described in an embodiment of the present utility model;

[0038] Figure 9 for Figure 8 The diagram shows the structure of the third gripper, the movable slider, and the slide rail.

[0039] Explanation of reference numerals in the attached figures:

[0040] 1. Core wire clamping mechanism; 10. First drive cylinder; 100. Fixing plate; 11. Transmission mechanism; 111. Rear connecting block; 112. Linkage plate; 113. Ring connector; 114. Front connecting block; 115. Swing rod; 116. Swing shaft; 12. Gripper fixing frame; 120. Guide groove; 13. Pivot pin; 14. First gripper; 140. Pin hole;

[0041] 2. Rotary tightening mechanism; 20. First drive motor; 21. First transmission unit; 211. First drive pulley; 212. First transmission belt; 213. First driven pulley; 22. Bearing housing; 23. Rolling bearing; 24. Tightening shaft;

[0042] 3. Base; 30. Frame;

[0043] 4. Wire fixing mechanism; 40. Fixing base; 41. Second drive cylinder; 42. Second gripper;

[0044] 5. Wire transfer mechanism; 50. Second drive motor; 51. Second transmission unit; 511. Second drive wheel; 512. Second transmission belt; 513. Second driven wheel; 52. Slide rail; 53. Moving slider; 530. Fixed base plate; 54. Third drive cylinder; 55. Third gripper;

[0045] 8. Conductor; 800. Core wire; 801. Insulation sheath. Detailed Implementation

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0047] In the description of this utility model, it should be stated that if terms such as "upper," "lower," "left," "right," "front," "back," "inner," and "outer" appear, they are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed or operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0048] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model in light of the specific circumstances. The limiting terms such as "first," "second," "A," "B," "C," and "D" appearing in the description of this utility model are merely for distinguishing similar features in different locations, attributions, or uses, in order to avoid ambiguity and confusion, and should not be construed as indicating or implying relative importance.

[0049] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0050] Example 1

[0051] This embodiment relates to a wire harness terminal crimping pre-tightening device for pre-processing each core wire 800 at the end of the wire harness. This reduces the likelihood of the core wires 800 at the end of the wire harness spreading out during terminal crimping, thus creating favorable conditions for the combined crimping of each core wire 800. An exemplary structure is shown below. Figure 1 , Figure 2 and Figure 3 As shown.

[0052] Overall, the wire harness terminal crimping pre-tightening device includes a base 3, a rotary tightening mechanism 2, and a core wire clamping mechanism 1 mounted on the base 3. The core wire clamping mechanism 1 includes a first clamping jaw 14 that can be controlled to open and close. When each core wire 800 at the end of the wire harness is moved into the open first clamping jaw 14, the controlled closing first clamping jaw 14 can clamp each core wire 800. The rotary tightening mechanism 2 can drive the first clamping jaw 14 to rotate about the axis of the wire harness, thereby tightening each core wire 800 in the first clamping jaw 14 together.

[0053] It should be noted that, based on the above overall design concept, the technical solution of this utility model can adopt a variety of different specific implementation structures, forms, or configuration sequences. For example, the aforementioned grippers can be existing mature products or designed separately; the rotary tightening mechanism 2 can be driven by a motor, rotary cylinder, etc.; the first gripper 14 can use different driving and control methods such as cylinders and motors. The specific arrangement sequence and assembly method of the core wire clamping mechanism 1, rotary tightening mechanism 2, etc. on the base 3 can also be flexibly adjusted. For parts required for the implementation of the overall solution but not involved in the above overall setup, reasonable and flexible designs can be made by referring to mature setup methods in the field and the actual situation during implementation. The specific implementation schemes described below in this embodiment are only one of the many solutions that can be formed by the above various combinations and variations. In actual implementation, those skilled in the art can make flexible adjustments and improvements based on the actual situation. Obviously, the various solutions that can be formed by the above specific combinations and variations, as well as the specific implementation schemes of this embodiment, are all within the protection scope of this utility model.

[0054] Specifically, combined Figure 4 , Figure 5 As shown, in addition to the first gripper 14, the core wire clamping mechanism 1 of this embodiment also includes a gripper fixing frame 12 mounted on the rotary tightening mechanism 2, a first driving cylinder 10 mounted on the base 3, and a transmission mechanism 11. The first gripper 14 has two relatively movable claw bodies. The relative movement of the two claw bodies enables the opening and closing of the first gripper 14. In this embodiment, the two claw bodies of the first gripper 14 are movably mounted on the gripper fixing frame 12. The first driving cylinder 10 drives the two claw bodies to approach or move away from each other via the transmission mechanism 11, thereby achieving the closing or opening action of the first gripper 14. The rotary tightening mechanism 2 drives the first gripper 14 to rotate about the axis of the wire harness via the gripper fixing frame 12. Using the first driving cylinder 10 to drive the two claw bodies of the first gripper 14 on the gripper fixing frame 12 effectively achieves the opening and closing action of the first gripper 14. The first driving cylinder 10 has the characteristics of timely response and easy control, and its purchase cost is low, which helps to reduce the overall cost of equipment manufacturing.

[0055] For the aforementioned transmission mechanism 11, various structural solutions are available; for example, a connecting rod can be used to achieve transmission between the first drive cylinder 10 and the first gripper 14. In this embodiment, as... Figure 5 and Figure 6 As shown, the transmission mechanism 11 includes a swing arm 115 corresponding to the two claw bodies. The swing arm 115 is mounted on the gripper fixing frame 12 via a swing shaft 116, allowing the swing arm 115 to swing on the gripper fixing frame 12. The swing shaft 116 is located at the middle of the swing arm 115, and the two ends of the swing arm 115 are respectively connected to the first drive cylinder 10 and the claw body via pivot pins 13. When the swing arm 115 is driven to swing by the first drive cylinder 10, it can drive the corresponding claw body to move. By synchronously driving the two swing arms 115 to swing through the first drive cylinder 10, the two claw bodies of the first gripper 14 are driven, which can simply and efficiently transform the linear drive of the first drive cylinder 10 into the symmetrical movement of the two claw bodies, thereby efficiently driving the opening and closing action of the first gripper 14.

[0056] Based on the above configuration, the following structural form is preferred. Two guide grooves 120 are provided vertically spaced on the gripper holder 12. The two claws of the first gripper 14 are slidably disposed in the two guide grooves 120 respectively. The pin hole 140 for hinged connection of the claw to the swing arm 115 is an elongated hole, in which the pivot pin 13 can move position with the swing arm 115. By slidably disposing of the two claws on the gripper holder 12 and designing the pin hole 140 as an elongated hole, the deviation between the movement path of the swing arm 115 end and the guiding movement direction of the claws can be effectively overcome. In a specific design, the arrangement direction of the elongated hole can be perpendicular to the guiding movement direction of the claws. In this embodiment, the two claws are vertically spaced and guided vertically along the height of the equipment, while the elongated hole is horizontally arranged. When the end of the swing arm 115 is connected to the claw, its path will be arc-shaped. There is a certain distance of movement in both the direction of movement of the claw and the direction of the elongated hole. The setting of the elongated hole well meets the movement path requirements of the end of the swing arm 115.

[0057] To allow for flexible arrangement of the first drive cylinder 10 and to achieve a good transmission effect between the rocker arm 115 and the first drive cylinder 10, the transmission mechanism 11 of this embodiment further includes a front connecting block 114 corresponding to the two rocker arms 115, and an annular connector 113 driven by the first drive cylinder 10 to move along the axial direction of the wire harness. The front connecting block 114 is axially guided on the gripper fixing frame 12, and the annular connector 113 has a groove arranged around the axis of the wire harness. One end of the front connecting block 114 is hooked in the groove, and the other end is hinged to the rocker arm 115. During the rotation of the front connecting block 114 with the gripper fixing frame 12, the hooked end of the front connecting block 114 slides within the groove.

[0058] A front connecting block 114 and an annular connector 113 are provided in the transmission mechanism 11. The annular groove on the annular connector 113 allows the gripper fixing frame 12, carrying the swing arm 115 and the front connecting block 114, to rotate relative to the annular connector 113. The annular connector 113 only needs to be guided and moved on the base 3 under the drive of the first drive cylinder 10. In this way, the first drive cylinder 10 can be directly fixed to the top of the bearing seat 22 in the rotary tightening mechanism 2 via the fixing plate 100, and the annular connector 113 can be directly fitted onto the rotary tightening mechanism. On the tightening shaft 24 in the tightening mechanism 2; the first drive cylinder 10 and the annular connector 113 can be connected by the rear connecting block 111 and the linkage plate 112. Under the drive of the first drive cylinder 10, the annular connector 113 only needs to move horizontally back and forth, without needing to rotate with the tightening shaft 24 of the rotary tightening mechanism 2. The tightening shaft 24 only needs to drive the gripper fixing frame 12 and its first gripper 14, front connecting block 114 and swing rod 115 to rotate, which greatly reduces the rotational load of the rotary tightening mechanism 2 and the difficulty of setting up the transmission mechanism 11.

[0059] There are, of course, various structural options available for the rotary tightening mechanism 2. In this embodiment, such as... Figure 4 , Figure 5 , Figure 6 As shown, the rotary tightening mechanism 2 includes a first drive motor 20 mounted on a base 3, a tightening shaft 24 for driving the first gripper 14 to rotate, and a first transmission unit 21 located between the first drive motor 20 and the tightening shaft 24. Specifically, a bearing housing 22 can be fixedly mounted above the first drive motor 20, two sets of rolling bearings 23 can be installed in the bearing housing 22, and the tightening shaft 24 can be installed into the two sets of rolling bearings 23. The rotary tightening mechanism 2 is driven by a motor, which has the advantage of easy and precise control. The rotary drive action of the first drive motor 20 can well meet the rotary drive requirements of the rotary tightening mechanism 2 for the first gripper 14.

[0060] It should be noted that, in order to make the arrangement of the core wire clamping mechanism 1 and the rotary tightening mechanism 2 more flexible and reasonable, a frame 30 can be set on the base 3, and the aforementioned first drive cylinder 10, bearing seat 22 and first drive motor 20 can be fixed on the frame 30 in an up-down arrangement.

[0061] Given that the rotary tightening mechanism 2 is driven by the first drive motor 20, the first transmission unit 21 preferably adopts a belt drive. Specifically, the first transmission unit 21 in this embodiment includes a first drive pulley 211 disposed on the power output shaft of the first drive motor 20, a first driven pulley 213 disposed on the tightening shaft 24, and a first transmission belt 212 disposed between the first drive pulley 211 and the first driven pulley 213. The belt drive between the first drive motor 20 and the tightening shaft 24 allows for a suitable transmission ratio by configuring the first drive pulley 211 and the first driven pulley 213 with appropriate diameters. Furthermore, the first transmission belt 212 provides flexible transmission distance, facilitating the flexible arrangement of the first drive motor 20 and the tightening shaft 24.

[0062] When the end of the wire harness is moved into the opened first clamp 14, it can be done manually. The operator can organize multiple wires 8 into a wire harness, align the core wires 800 with the insulation sheath 801 removed from their ends, and then move the core wires 800 into the first clamp 14. During the process of the rotating tightening mechanism 2 driving the first clamp 14 to rotate and tighten each core wire 800, the wire harness should be held firmly to prevent the entire wire harness from rotating with the rotation of the first clamp 14, so that the core wires 800 at the end of the wire harness can be tightened together well.

[0063] However, in order to reduce the intensity of manual operations, such as Figure 1 and combined Figure 7As shown, the wire harness terminal crimping pre-tightening device of this embodiment also includes a wire fixing mechanism 4 disposed on the base 3. The wire fixing mechanism 4 has a second clamp 42 that can be controlled to open and close. The second clamp 42 is disposed corresponding to the first clamp 14. The open second clamp 42 can accept the insertion of a set number of wires 8, and the controlled closed second clamp 42 can crimp each wire 8 into a wire harness, and position each core wire 800 at the end of the wire harness within the open first clamp 14. Specifically, a fixed base 40 can be fixedly mounted on the base 3, and a second drive cylinder 41 can be disposed on the fixed base 40 to drive the opening and closing of the second clamp 42. By setting the wire fixing mechanism 4 on the base 3, multiple wires 8 can be pressed into a wire bundle, and a stable clamping and fixing of the wire bundle can be formed. With the rotation drive of the rotating tightening mechanism 2 and the clamping of the first jaw 14, the merging and spiral winding of each core wire 800 at the end of the wire bundle can be completed smoothly, so that each core wire 800 is tightened together.

[0064] In addition, such as Figure 1 and combined Figure 8 , Figure 9 As shown, the wire harness terminal crimping pre-tightening device of this embodiment also includes a wire transfer mechanism 5 disposed on the base 3; the wire transfer mechanism 5 includes a third gripper 55 that can be manipulated to open and close, and a drive unit for driving the third gripper 55 to reciprocate. During the filling and transfer of the wire 8, as the third gripper 55 opens, closes and reciprocates, the third gripper 55 can move the wire 8 into the open second gripper 42. By configuring the device with the wire transfer mechanism 5, the wires 8 can be transferred one by one to the wire fixing mechanism 4 by utilizing the reciprocating third gripper 55 on the wire transfer mechanism 5, thereby quickly completing the joining operation of multiple wires 8, thereby forming a wire harness that needs to be crimped.

[0065] For the configuration of the drive unit, there are naturally many different structural schemes to choose from; different methods such as cylinders and robotic arms can be used to drive the movement of the third gripper 55. In this embodiment, as... Figure 8 , Figure 9 As shown, the base 3 is provided with a slide rail 52, and the third gripper 55 is slidably disposed on the slide rail 52 via a movable slider 53. The movable slider 53 is provided with a third drive cylinder 54 for driving the third gripper 55 to perform opening and closing actions. The drive unit includes a second drive motor 50 and a second transmission belt 512 that reciprocates under the drive of the second drive motor 50. The movable slider 53 is connected to the second transmission belt 512 and reciprocates on the slide rail 52 as the second transmission belt 512 moves.

[0066] By setting a slide rail 52 on the base 3, the second drive motor 50 drives the second transmission belt 512 to reciprocate, thereby driving the movable slider 53 to move on the slide rail 52 and carrying the third gripper 55 for transfer. The second transmission belt 512 can be a regular belt or a toothed belt. Correspondingly, the second drive pulley 511 on the power shaft of the second drive motor 50 and the corresponding second driven pulley 513 are both gears. The second drive pulley 511, the second transmission belt 512, and the second driven pulley 513 together constitute the second transmission unit 51, realizing the transmission between the second drive motor 50 and the movable slider 53. This greatly improves the transmission reliability of the second transmission belt 512. The third gripper 55 can be fixed to the movable slider 53 by a fixed base plate 530. The fixed base plate 530 can have only one third gripper 55 or two third grippers 55 spaced apart. When two third grippers 55 are set, the two third grippers 55 can take turns to perform the clamping and transfer operations of the wire 8. One third gripper 55 clamps the wire 8 and moves it into the second gripper 42 in the wire fixing mechanism 4, while the other third gripper 55 can open to welcome the insertion of another wire 8.

[0067] As is well known, at present, when performing multi-wire crimping of various terminals such as grounding and bridging terminals, it is necessary to bundle together multiple wires 8 with their insulation stripped at one end 801, exposing the core wires 800, and then combine the core wires 800 at that end together and crimp them into a single terminal. Ordinary single-wire crimping simply crimps one wire 8 into the terminal, which is relatively simple and avoids the situation where the core wires 800 spread out outside the terminal. Therefore, single-wire terminal crimping can achieve automatic cable clamping to complete the crimping process.

[0068] However, when multiple wires are crimped together, such as grounding terminals, using the automated production method for single-wire terminal crimping, the clamping claws will naturally spread out when holding the wire harness near the end of the core wire 800. This means that during the crimping process, the crimping area of ​​the grounding terminal cannot completely gather and crimp each conductor 800 into the terminal, resulting in some core wires 800 not being crimped and remaining outside the crimping area. If this happens, it can easily cause short circuits and short circuits in automotive wiring, which is a serious quality problem.

[0069] For the reasons mentioned above, the current industry can only use manual crimping for multi-wire merging of grounding terminals, which cannot be fully automated. This results in many problems, such as difficulty in operation, low production efficiency, high personnel requirements, many processing steps, large amounts of wire storage and turnover, and difficulty in ensuring product consistency.

[0070] This utility model of wire harness terminal crimping pre-tightening equipment enables multiple core wires 800 at the end of the wire harness to be clamped by the first jaw 14 of the core wire clamping mechanism 1 before being crimped together, and then tightened by the rotation tightening mechanism 2, thereby bringing the core wires 800 together. This provides good conditions for the automatic crimping production of grounding terminals. In this way, the existing manual processing technology can be replaced by automated equipment, thereby greatly improving production efficiency.

[0071] Of course, in addition to the aforementioned actuators such as the core wire clamping mechanism 1, the rotary tightening mechanism 2, the wire fixing mechanism 4, and the wire transfer mechanism 5, the equipment should also be equipped with a control unit and a power supply unit. The control unit can be controlled by a PLC, while the power supply unit is responsible for converting 220V AC power into 36V and 24V DC power, respectively providing 36V DC power to the first drive motor 20 and the second drive motor 50, and providing 24V DC power to the PLC.

[0072] In addition, the control unit may include a PLC, solenoid valves, relays, and limit sensors. It primarily controls the drive devices such as the first drive cylinder 10, the first drive motor 20, and the second drive motor 50 in each mechanism, and is responsible for detecting the placement of wires 8, wire harnesses, etc. Preferably, the first drive motor 20 is a servo motor, which allows for precise control of the motor speed, number of rotations, and angle. Based on the above description of the functions, sequence, and principles of each mechanism's actions, those skilled in the art can achieve equipment operation control through simple and reasonable settings.

[0073] As can be seen from the above, the wire harness terminal crimping pre-tightening equipment of this utility model can realize the automated production of multi-wire merging crimping of grounding terminals, replacing the existing manual production method. It solves the problem that the core wires 800 are prone to loosening when the clamps hold multiple cables before multi-wire merging crimping. During crimping, the grounding terminal can include each core wire 800 in the core wire crimping area, which can completely achieve the purpose of gathering the core wires 800 of multiple conductors 8, thereby avoiding the phenomenon of the core wires 800 falling outside the crimping terminal. This utility model's wire harness terminal crimping pre-tightening device is used before the merging and crimping of wire harnesses. It utilizes a rotary tightening mechanism 2 to drive the first gripper 14 in the core wire clamping mechanism 1 to perform a slight pre-tightening operation on the end core wire 800, so as to achieve the purpose of gathering the core wire 800 before crimping. Ultimately, it realizes the fully automated production of grounding terminal merging and crimping, simplifies the existing production process of grounding wire merging and crimping terminals, reduces the storage and turnover process of the wire 8, and helps to reduce terminal damage and other adverse problems caused by storage and turnover. It also shortens the production cycle, improves production efficiency, and reduces the labor intensity of production personnel.

[0074] In summary, the wire harness terminal crimping pre-tightening device of this embodiment, by setting a rotary tightening mechanism 2 and a core wire clamping mechanism 1, performs pre-tightening treatment on each core wire 800 at the end of the wire harness before merging and crimping. First, the first jaw 14 in the core wire clamping mechanism 1 is used to press each core wire 800 together. Then, with the help of the rotary tightening mechanism 2, the core wires 800 are tightened together as one unit. In this way, when the end of the wire harness is placed in the crimping area of ​​the terminal for terminal crimping, the clamping of the wire harness is less likely to cause the core wires 800 to spread out naturally. This reduces the possibility of the core wires 800 at the end of the wire harness spreading out during terminal crimping, thereby creating favorable conditions for the merging and crimping of each core wire 800.

[0075] The above description is merely a preferred embodiment of this utility model. Detailed explanations of configurations, examples of specific structural arrangements, and descriptions of assembly and connection methods are provided to ensure sufficient disclosure so that those skilled in the art can better implement this utility model, and are not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A wire harness terminal crimping pre-tightening device for pre-treating each core wire (800) at the end of a wire harness, characterized in that: The wire harness terminal crimping pre-tightening device includes a base (3), a rotary tightening mechanism (2) and a core wire clamping mechanism (1) provided on the base (3); The core wire clamping mechanism (1) includes a first clamp (14) that can be manipulated to open and close. When each of the core wires (800) at the end of the wire harness is transferred into the open first clamp (14), the first clamp (14) that is manipulated to close can press each of the core wires (800) together. The rotary tightening mechanism (2) can drive the first gripper (14) to rotate about the axis of the wire harness to tighten each of the core wires (800) in the first gripper (14) together.

2. The wire harness terminal crimping and pre-tightening device according to claim 1, characterized in that: The core wire clamping mechanism (1) further includes a clamping claw fixing frame (12) disposed on the rotary tightening mechanism (2), a first driving cylinder (10) disposed on the base (3), and a transmission mechanism (11); The two claws of the first gripper (14) are movably mounted on the gripper fixing frame (12). The first drive cylinder (10) drives the two claws to approach or move away through the transmission mechanism (11) to realize the closing or opening action of the first gripper (14). The rotary tightening mechanism (2) drives the first clamp (14) to rotate around the axis of the wire harness via the clamp fixing frame (12).

3. The wire harness terminal crimping and pre-tightening device according to claim 2, characterized in that: The transmission mechanism (11) includes a swing arm (115) corresponding to the two claw bodies. The swing arm (115) is mounted on the gripper fixing frame (12) via a swing shaft (116). The swing shaft (116) is located in the middle of the swing arm (115). The two ends of the swing arm (115) are respectively connected to the first driving cylinder (10) and the claw body. The swing arm (115) is driven to swing by the first driving cylinder (10) to drive the corresponding claw body to move.

4. The wire harness terminal crimping and pre-tightening device according to claim 3, characterized in that: The claw body is slidably mounted on the gripper fixing frame (12), and the pin hole (140) of the claw body for hinged to the swing rod (115) is an elongated hole, in which the pivot pin (13) can move in position as the swing rod (115) swings.

5. The wire harness terminal crimping and pre-tightening device according to claim 3, characterized in that: The transmission mechanism (11) further includes a front connecting block (114) corresponding to the two swing arms (115), and an annular connector (113) driven by the first driving cylinder (10) to move along the axial direction of the wire harness. The front connecting block (114) is guided along the axial direction of the wire harness and is mounted on the clamp fixing frame (12), and the annular connector (113) is provided with a groove arranged around the axis of the wire harness. One end of the front connecting block (114) is hooked in the groove, and the other end is hinged to the swing rod (115). During the rotation of the front connecting block (114) with the gripper fixing frame (12), the hooked end of the front connecting block (114) slides in the groove.

6. The wire harness terminal crimping and pre-tightening device according to claim 1, characterized in that: The rotary tightening mechanism (2) includes a first drive motor (20) mounted on the base (3), a tightening shaft (24) for driving the first gripper (14) to rotate, and a first transmission unit (21) mounted between the first drive motor (20) and the tightening shaft (24).

7. The wire harness terminal crimping and pre-tightening device according to claim 6, characterized in that: The first transmission unit (21) includes a first drive wheel (211) disposed on the power output shaft of the first drive motor (20), a first driven wheel (213) disposed on the tightening shaft (24), and a first transmission belt (212) disposed between the first drive wheel (211) and the first driven wheel (213).

8. The wire harness terminal crimping pre-tightening device according to any one of claims 1 to 7, characterized in that: It also includes a wire fixing mechanism (4) provided on the base (3), the wire fixing mechanism (4) having a second gripper (42) that can be operated to open and close; The second gripper (42) is configured to correspond to the first gripper (14). The open second gripper (42) can accept the insertion of a set number of wires (8), and the closed second gripper (42) can press each of the wires (8) into the wire bundle and place each of the core wires (800) at the end of the wire bundle in the open first gripper (14).

9. The wire harness terminal crimping pre-tightening device according to claim 8, characterized in that: It also includes a wire transfer mechanism (5) disposed on the base (3), the wire transfer mechanism (5) including a third gripper (55) that can be manipulated to open and close, and a drive unit for driving the third gripper (55) to reciprocate. As the third gripper (55) opens and closes and reciprocates, the third gripper (55) can move the wire (8) into the opened second gripper (42).

10. The wire harness terminal crimping pre-tightening device according to claim 9, characterized in that: The base (3) is provided with a slide rail (52), and the third gripper (55) is slidably disposed on the slide rail (52) by means of a movable slider (53); The drive unit includes a second drive motor (50) and a second transmission belt (512) that reciprocates under the drive of the second drive motor (50); The movable slider (53) is connected to the second transmission belt (512) and moves back and forth on the slide rail (52) as the second transmission belt (512) moves.

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