A bending fixture for automotive wiring harness terminals

Abstract

This invention relates to the field of automotive wiring harness connector terminal processing technology, specifically proposing an automotive wiring harness terminal bending fixture; used for synchronously bending multiple pins in a single row of pin terminals, including a rotating frame, two side clamping modules, and a tension claw; the side clamping module includes a mold base plate slidably mounted on the rotating frame, a bending plate in contact with the pin bending, and a flexible isolation pad; the isolation pad is clamped and fixed between the bending plate and the mold base plate; a correction plate for pin spacing correction is embedded in the bending contact surface of the bending plate; the tension claw is slidably mounted on the rotating frame and slides in cooperation with the bending plates in the two side clamping modules along the sliding direction; the bending fixture provided by this invention, while ensuring the pin bending angle accuracy, synchronously corrects the pin spacing to ensure the overall accuracy of the pins after bending, so as to facilitate subsequent assembly, and at the same time ensure the reliability and stability of the electrical connection after use.

Description

Technical Field

[0001] This invention relates to the field of automotive wiring harness connector terminal processing technology, and specifically proposes an automotive wiring harness terminal bending fixture. Background Technology

[0002] Automotive wiring harness bend connectors are core components in automotive wiring harness systems that enable separable electrical connections. Also called pin terminals, they contain single or multiple rows of pins, as shown in the image. Figure 10 As shown, stable and low-resistance conductivity is achieved through stable contact points on the pin terminals. Simultaneously, to adapt to spatial layout and better conduction, the entire row of pins is typically bent uniformly from a straight line to a specific angle. In existing technologies, a single-sided bending template is often used to uniformly fold the pins for bending and forming. While the bending fixture is simple and the bending process is quick, the pins undergo not only plastic deformation but also elastic deformation during bending. After bending, the elastic deformation recovers, resulting in a springback, causing the actual bending angle of the pins to be less than the required angle. Although uniform bending is used, the springback amount varies among different pins, exhibiting discrete deviations. Furthermore, the pins of the pin terminals are fixed before uniform bending. During transport, the pins collide and come into contact, easily causing localized bending or lateral bending deformations. Existing bending fixtures can generally correct minor bends (excluding lateral bending) during bending, but lateral bending is largely uncorrected, resulting in uneven pin gaps.

[0003] In summary, existing bending fixtures may cause quality problems such as inconsistent bending angles and uneven pin gaps after uniformly bending the pin terminals arranged in a row. For high-precision pin terminals, this affects the subsequent assembly alignment accuracy, causing assembly difficulties, and also affects the reliability and stability of electrical connections. It may even increase the risk of deformation and breakage of the pins after use. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides an automotive wiring harness terminal bending fixture, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention employs the following technical solution: a bending fixture for automotive wiring harness terminals, used for simultaneously bending multiple pins in a single row of pin terminals, comprising a rotating frame, two side clamping modules, and tension claws; the rotating frame is horizontally rotatable; the two side clamping modules are slidably mounted relative to each other on the rotating frame, and are vertically distributed when the rotating frame is horizontal; each side clamping module includes a mold base plate slidably mounted on the rotating frame, a bending plate in contact with the bending of the pins, and a flexible isolation pad; the isolation pad is clamped and fixed between the bending plate and the mold base plate; the bending contact of the bending plate... An embedded straightening plate for correcting pin spacing is mounted on the surface; a tension claw is slidably mounted on the rotating frame and slides in cooperation with the bending plates in the two side clamping modules along the sliding direction; through sliding, the sliding contact between the tension claw and the bending plate can switch from flexible contact to rigid contact; in the flexible contact state, the straightening plate and the bending plate are flush, and the rotating frame drives the two side clamping modules to rotate and pre-bend the pins; during the process of sliding to the rigid contact state and continuing to slide, the tension claw first drives the two straightening plates to move closer together to correct the pin spacing, and then increases the internal tension force to drive the two bending plates to correct and shape the pins.

[0006] Preferably, both ends of the bending plate along the axial direction of the rotating frame shaft are provided with stepped holes including large and small inner hole sections. A guide sleeve is embedded and fixed in the larger inner hole section of the stepped hole. The tension claw is provided with a corresponding insertion rod on each of the stepped holes on the two bending plates. The insertion rod slides with the guide sleeve, and the insertion rod is in transition fit with the smaller inner hole section in the stepped hole. When the insertion rod slides from the guide sleeve into the smaller inner hole section in the stepped hole, the contact changes from flexible contact to rigid contact.

[0007] Preferably, a mold groove is provided on the bending contact surface of the bending plate; multiple guide rods that slide with the bending plate are fixed on the straightening plate, and multiple tension springs are connected between the straightening plate and the mold base plate; under the elastic force of the multiple tension springs, the straightening plate is embedded and pressed tightly in the mold groove, and the straightening plate is flush with the surface of the bending plate.

[0008] Preferably, a crossbar is fixed between the ends of two rods that are slidably inserted into the same bending plate and located away from the rotation center axis of the rotating frame; a snap-fit ​​groove is provided on the side end of the bending plate to engage with the corresponding crossbar, and the snap-fit ​​groove is connected between the ports of the larger inner hole section of the two stepped holes.

[0009] Preferably, the straightening plate has an abutment strip protruding away from the other straightening plate at one end away from the rotation center axis of the rotating frame; when the crossbar moves closer to the snap-fit ​​groove and the insert rod slides into the smaller inner hole section of the stepped hole, the crossbar touches the abutment strip, causing the straightening plate to move outward from the mold groove.

[0010] Preferably, at least one arc-shaped elastic plate is fixed between the two crossbars; the inner arc surface of the elastic plate faces away from the rotation center axis of the rotating frame; a slider is fixed on the elastic plate and the slider is slidably mounted on the rotating frame.

[0011] Preferably, the connection positions of the slider, the two crossbars, and the elastic plate are arranged in an isosceles triangle, and the connection position of the slider and the elastic plate is located at the vertex of the isosceles triangle.

[0012] Preferably, the correction plate is provided with a plurality of partition plates evenly distributed; the partition plates are used to be inserted into the gap between adjacent pins.

[0013] Preferably, the back of the bending plate is provided with a back groove, the isolation pad is embedded in the back groove, and the mold base plate is provided with a clamping part for clamping the isolation pad, and the clamping part is embedded in the back groove.

[0014] Preferably, a plurality of guide posts are fixed in the back groove, and the plurality of guide posts slide through and are in contact with the isolation pad and the mold base plate; each guide post is threadedly fitted with a clamping ring, which clamps the isolation pad between the mold base plate and the bending plate.

[0015] The above technical solution has the following advantages or beneficial effects: This invention provides a bending fixture for automotive wiring harness terminals, which replaces the existing single-sided bending plate structure design with two oppositely arranged side clamping modules. The tension claw controls the gap between the two side clamping modules, and can switch between flexible and rigid contact states between the two modules. In the flexible contact state, the pins of the connector terminal can be pre-bent, and the non-rigid clamping constraint guides the pins to actively release bending stress, allowing natural springback. In the rigid contact state, based on the complete pre-bending of the pins, the pin gap is first corrected to eliminate lateral bending deformation. Then, while maintaining the gap correction state, the pins are corrected and shaped by rigid clamping and pressure holding. The bending fixture provided by this invention ensures the accuracy of the pin bending angle and simultaneously corrects the pin spacing to ensure the overall accuracy of the bent pins, facilitating subsequent assembly and ensuring the reliability and stability of the electrical connection after use. Attached Figure Description

[0016] The invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings, which are not intentionally drawn to scale; the focus is on illustrating the gist of the invention.

[0017] Figure 1 This is a three-dimensional structural diagram of an automotive wiring harness terminal bending fixture.

[0018] Figure 2This is a front view of an automotive wiring harness terminal bending fixture.

[0019] Figure 3 It is a three-dimensional structural diagram of the side clamp module assembled with the crossbar and insert rod.

[0020] Figure 4 This is a three-dimensional sectional view of the side clamp module.

[0021] Figure 5 This is a three-dimensional structural diagram of the mold base plate.

[0022] Figure 6 This is a three-dimensional structural diagram of the bent plate.

[0023] Figure 7 This is a 3D structural diagram of the isolation pad.

[0024] Figure 8 This is a planar cross-sectional view of the tension claw and two side clamping modules when pre-bending the insert pin.

[0025] Figure 9 This is a planar cross-sectional view of the tension claw and two side clamping modules when they are correcting and shaping the pre-bent pins.

[0026] Figure 10 This is a 3D structural diagram of the pin terminal.

[0027] In the diagram: 1. Bending machine base; 2. Rotating frame; 21. Side plate; 22. Horizontal plate; 3. Side clamping module; 31. Mold base plate; 311. Clamping plate; 32. Bending plate; 321. Mold groove; 322. Stepped hole; 323. Snap-fit ​​groove; 324. Guide sleeve; 325. Guide post; 33. Straightening plate; 331. Contact strip; 332. Separator plate; 333. Guide rod; 334. Tension spring; 34. Isolation pad; 35. Clamping ring; 4. Tension claw; 41. Slider; 42. Elastic plate; 43. Horizontal bar; 44. Insert rod; 5. Pin terminal; 51. Terminal housing; 52. Pin. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1 , Figure 2 and Figure 10 As shown, an automotive wiring harness terminal bending fixture is used to simultaneously bend multiple pins 52 in a single row of pin terminals 5. It should be noted that, to ensure the bending accuracy of the wiring harness terminals, the automotive wiring harness terminal bending fixture provided by this invention is a specialized fixture for bending specific types of wiring harness terminals. Figure 10 The diagram shows a pin terminal 5, specifically a single-row flat-head bent pin connector. The pin terminal 5 includes a terminal housing 51 and a row of pins 52 pre-fixed on the terminal housing 51. The single row of pins 52 is subsequently bent at the required angles, such as 30°, 45°, and 90°. In this embodiment, the bending process is for a 90° angle. It should also be emphasized that the pin terminal 5 is not limited to a single-row bent pin connector; it can also be a multi-row bent pin connector. To control accuracy, multi-row bent pin connectors can be bent in stages. The automotive wiring harness terminal bending fixture provided by this invention can be matched and applied to the corresponding pin terminal 5.

[0031] like Figure 1 and Figure 2 As shown, the automotive wiring harness terminal bending fixture includes a bending machine base 1, a rotating frame 2, two side clamping modules 3, and a tension claw 4. The rotating frame 2 includes two horizontally opposite side plates 21 and a horizontal plate 22 fixed between the two side plates 21 by bolts. Two bearings with seats are fixed on the bending machine base 1 by bolts, and the two side plates 21 are rotatably mounted on the two bearings with seats through a rotating shaft. In this embodiment, the rotating frame 2 can be driven to rotate by a gear and rack mechanism (not shown in the figure). Specifically, a cylinder can be horizontally fixed on the bending machine base 1, the rack is fixed to the output end of the cylinder, and the gear is fixed on the rotating shaft of the side plate 21 adjacent to the cylinder. The gear meshes with the rack, so that the rotating frame 2 flips between the initial horizontal state and the bending vertical state. In order to achieve state locking, the cylinder can be an existing self-locking cylinder.

[0032] like Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 and Figure 9As shown, two side clamping modules 3 are slidably mounted on the rotating frame 2, and are horizontally distributed when the rotating frame 2 is vertical; a primary slide rail is welded on the side plate 21 and is perpendicular to the rotating shaft; the side clamping module 3 includes a mold base plate 31 slidably mounted on the primary slide rail of the two side plates 21, a bending plate 32 that bends and contacts the pin 52, and a flexible isolation pad 34; the back of the bending plate 32 is provided with a rectangular back groove, the isolation pad 34 is made of rubber and is embedded in the back groove, the mold base plate 31 is provided with a clamping part 311 for clamping the isolation pad 34, and the clamping part 311 is embedded in the back groove to improve the stability of the installation and cooperation between the bending plate 32 and the mold base plate 31; the back groove is provided with a clamping part 311 for clamping the isolation pad 34, and the clamping part 311 is embedded in the back groove to improve the stability of the installation and cooperation between the bending plate 32 and the mold base plate 31; Three guide posts 325 are fixed by screws and are evenly distributed along the axial direction of the side plate 21. The three guide posts 325 slide through and engage with the isolation pad 34 and the mold base plate 31. Each guide post 325 is threaded with a clamping ring 35. By tightening the clamping ring 35, the isolation pad 34 is clamped between the mold base plate 31 and the bending plate 32. It should be emphasized that in order to avoid excessive compression of the isolation pad 34 due to excessive pre-tightening force, and to facilitate the proper functioning of the isolation pad 34 during subsequent pre-bending, the clamping ring 35 is tightened until the isolation pad 34 is slightly pressed against the mold base plate 31 and the bending plate 32, and an isolation gap is maintained between the mold base plate 31 and the bending plate 32.

[0033] like Figure 2 , Figure 4 , Figure 6 , Figure 8 and Figure 9 As shown, a mold groove 321 is formed on the bending contact surface of the bending plate 32; a straightening plate 33 for correcting the spacing of the pins 52 is embedded in the mold groove 321, and the thickness of the straightening plate 33 is equal to the depth of the mold groove 321; a plurality of partition plates 332 are evenly provided on the straightening plate 33; the partition plates 332 are used to insert into the gaps between adjacent pins 52, and the width of the partition plates 332 is equal to the width of the gaps between adjacent pins 52. In order to facilitate the partition plates 332 to extend into the gaps between adjacent pins 52, the edges of the partition plates 332 are rounded; the back of the straightening plate 33 has corresponding partition plates 332 at each partition plate 332. Guide rods 333 are welded on the mold base plate 31 and slide through it. Each guide rod 333 has a corresponding guide hole on the mold base plate 31. The guide rods 333 pass through the isolation pad 34 and slide into the corresponding guide holes on the mold base plate 31. Three guide rods 333 slide into the guide posts 325. Three tension springs 334 are welded between the straightening plate 33 and the mold base plate 31. The three tension springs 334 are evenly distributed along the axis of rotation of the side plate 21. Under the elastic force of the three tension springs 334, the straightening plate 33 is pressed against the mold groove 321 and is flush with the surface of the bending plate 32.

[0034] like Figure 2and Figure 3 As shown, the tension claw 4 includes two sliders 41, two elastic plates 42, two crossbars 43, and two sets of insert rods 44. Secondary slide rails, perpendicular to the primary slide rails, are welded onto the side plates 21. The two sliders 41 are slidably installed in the secondary slide rails of the two side plates 21. In this embodiment, miniature cylinders (not shown) are fixed to both side plates 21, and the two sliders 41 are fixed to the output ends of the two miniature cylinders. The miniature cylinders are used to drive the sliders 41 to slide. The two sliders 41 are welded to the two elastic plates 42 via insert rods 44. The elastic plates 42 have an arc-shaped structure and are made of spring steel. The inner arc surface of the elastic plates 42 faces away from the rotating shaft of the side plates 21. The two crossbars 43 are arranged parallel to each other and horizontally welded between the two elastic plates 42. Two sets of insert rods 44 are welded to the two crossbars 43, with two rods in each set, and the insert rods 44 are perpendicular to the crossbars 43. Two sets of insert rods 44 are correspondingly engaged with two side clamping modules 3; both ends of the bending plate 32 along the axial direction of the side plate 21 are provided with stepped holes 322 including large and small inner hole sections, and a guide sleeve 324 is embedded and fixed in the larger inner hole section of the stepped hole 322; a snap-fit ​​groove 323 is provided on the side end of the bending plate 32 away from the center of the side plate 21, which is engaged with the corresponding crossbar 43, and the snap-fit ​​groove 323 is connected between the ports of the larger inner hole sections of the two stepped holes 322; an abutting strip 331 protruding from the other straightening plate 33 is provided on the end of the straightening plate 33 away from the side plate 21. In each group, two insert rods 44 are inserted into the two stepped holes 322 of the bending plate 32. The insert rods 44 are slidably engaged with the guide sleeves 324, and the insert rods 44 are in transitional engagement with the smaller inner hole section of the stepped hole 322. When the insert rods 44 slide from the guide sleeves 324 into the smaller inner hole section of the stepped hole 322, the contact changes from flexible to rigid.

[0035] like Figure 2 and Figure 8 As shown, the connection positions of the slider 41 and the two crossbars 43 with the elastic plate 42 are distributed in an isosceles triangle, and the connection position of the slider 41 and the elastic plate 42 is located at the vertex of the isosceles triangle. When bending stress is applied to the elastic plate 42 through the slider 41, it is ensured that the tension indirectly acting on the two crossbars 43 by the elastic plate 42 is approximately equal.

[0036] When the two sliders 41 are furthest from the pivot of the side plate 21, the insert rod 44 is only inserted into the guide sleeve 324. The insert rod 44 has an indirect flexible contact with the stepped hole 322 through the guide sleeve 324. A certain amount of movement gap is reserved between the insert rod 44 and the stepped hole 322, so that the bending plate 32 indirectly obtains the movement gap to compress the isolation pad 34. It should be added that in order for the isolation pad 34 to provide lateral elastic support to the bending plate 32, the first-stage slider of the side plate 21... Two limiting blocks, not shown in the figure, are also fixed in the rail by screws. Specifically, two mold base plates 31 are located between the two limiting blocks, and the two mold base plates 31 are in corresponding contact with the two limiting blocks. When the bending plate 32 presses against the isolation pad 34, the mold base plate 31 abuts against the limiting blocks, and the isolation pad 34 is compressed. In addition, the two elastic plates 42 are in a naturally bent state. In this state, a gap is maintained between the two bending plates 32, and the gap is slightly larger than the thickness of the pin 52. In the flexible contact state, it is suitable for pre-bending the pin 52.

[0037] When the two sliders 41 are driven by two miniature cylinders to slide synchronously toward the pivot of the side plate 21, the two elastic plates 42, the two crossbars 43, and the two sets of insertion rods 44 move synchronously. The insertion rods 44 are inserted from the guide sleeve 324 into the smaller inner section of the stepped hole 322. Since the insertion rods 44 and the smaller inner section of the stepped hole 322 have a transition fit, the contact between the insertion rods 44 and the stepped hole 322 switches from flexible contact to rigid contact. At this time, the tension claw 4 is rigidly constrained between the two bending plates 32, and the lateral elastic support of the isolation pad 34 is ineffective. After switching to the rigid contact state, the pre-bent insertion pins 52 can be clamped and pressure-held for shaping.

[0038] To complement the automotive wiring harness terminal bending fixture provided by this invention Figure 10 The pin terminal 5 shown is bent and can be used with an external positioning and conveying fixture. This fixture includes a positioning mold, a pressing component, a lifting platform, and a transverse platform. The transverse platform is fixed on the lifting platform, and the positioning mold and pressing component are fixed on the transverse platform. The positioning mold has a limiting groove that matches the outer contour of the terminal housing 51, allowing the pin terminal 5 to be positioned on the positioning mold. The pressing component is used to press the terminal housing 51. In the initial state, the positioned pin terminal 5 is horizontally aligned with the two side clamping modules 3. The transverse platform moves the pin terminal 5, allowing the pin 52 to be horizontally inserted into the gap between the two bending plates 32. The lifting platform, after bending, moves the bent pin 52 downwards from between the two side clamping modules 3. It should be noted that the positioning and conveying fixture is not shown in the attached drawings, but its structure is simple, and those skilled in the art can implement it using existing technology and common sense.

[0039] During the actual processing, initially, the rotating frame 2 is in a horizontal state, and the tension claw 4 is in flexible contact with the two side clamping modules 3. After the pin terminals 5 are positioned, they are moved laterally so that multiple pins 52 in the same row extend into the gap between the two bending plates 32. Then, the rotating frame 2 drives the two side clamping modules 3 to flip to a vertical state, pre-bending the pins 52 to ninety degrees. Since the two bending plates 32 do not rigidly clamp the pins 52 at this time, the pins 52 have a small gap, allowing them to spring back naturally and actively release bending stress. This allows for a discrete deviation in the bending angle of multiple pins 52 after pre-bending. (See details below.) Figure 8 As shown.

[0040] Subsequently, by moving the slider 41, the flexible contact is switched to rigid contact. As the crossbar 43 moves synchronously with the slider 41, before the crossbar 43 is fully engaged in the engagement groove 323, the insertion rod 44 can still slide in the stepped hole 322. The two elastic plates 42 basically maintain their natural state, and the gap between the two bending plates 32 remains unchanged from the initial state. However, when the crossbar 43 moves, it will contact the abutment strip 331, causing the straightening plate 33 to be forced to move outward from the mold groove 321. The two straightening plates 33 will be relatively close and tightly pressed together, and the partition plates 332 in the relative positions of the two straightening plates 33 will extend into the gap of the corresponding adjacent insertion pin 52 to pre-correct the gap of the insertion pin 52 and correct any possible lateral bending deformation of the insertion pin 52. After the crossbar 43 is fully moved and engaged in the engagement groove 323, the crossbar 43 still maintains contact with the abutment strip 331, and the straightening plate 33 maintains its corrected state.

[0041] As the slider 41 continues to slide, the bending plate 32 restricts the crossbar 43 through the snap-fit ​​groove 323, preventing the insertion rod 44 from continuing to slide along the stepped hole 322. The slider 41 forces the elastic plate 42 to continue bending and deforming, causing the elastic plate 42 to generate an internal tension force on the crossbars 43 on both sides. The crossbars 43 cooperate with the two insertion rods 44 to pull the side clamping module 3 to slide along the first-level slide rail. The two bending plates 32 will move slightly closer together and clamp the insertion pin 52 with pressure. This allows the insertion pin 52, which has a discrete deviation in bending angle, to be corrected and shaped again after the gap correction is completed, in order to achieve the final shaping and ensure the accuracy of the bending angle and gap distribution of the insertion pin 52. The specific state can be seen in the figure. Figure 9 As shown. It should be noted that the straightening and shaping is equivalent to a secondary bending based on the discrete angular deviation, achieving angular correction. The bending angle is small, so the springback deformation after straightening and shaping is negligible. In addition, the crossbar 43 is engaged in the engaging groove 323, and the crossbar 43 can work with the two insert rods 44 to pull the bending plate 32, compensating for the insufficient pulling strength of the two insert rods 44.

[0042] After clamping and holding pressure for several seconds, the slider 41 moves in the opposite direction. First, the rigid clamping of the two bending plates 32 on the pin 52 is released. Then, the crossbar 43 separates from the contact bar 331, so that the straightening plate 33 is reset under the tension of the tension spring 334. Finally, the pin 44 is completely retracted into the guide sleeve 324. After the bent pin 52 moves downward from between the two bending plates 32, the rotating frame 2 rotates back to the horizontal state.

[0043] In this invention, two opposing side clamping modules 3 are used instead of the existing single-sided bending plate 32 structure. The gap between the two side clamping modules 3 is controlled by tension claws 4. The tension claws 4 can switch between flexible contact and rigid contact between the two side clamping modules 3. In the flexible contact state, the pins 52 of the pin terminal 5 can be pre-bent. The non-rigid clamping constraint guides the pins 52 to actively release bending stress and allows natural springback. In the rigid contact state, the gap between the pins 52 can be corrected first to eliminate lateral bending deformation after the pins 52 are fully pre-bent. Then, while maintaining the gap correction state, the pins 52 are corrected and shaped by rigid clamping pressure. Thus, while ensuring the bending angle accuracy of the pins 52, the spacing between the pins 52 is simultaneously corrected to ensure the overall accuracy of the pins 52 after bending, so as to facilitate subsequent assembly and ensure the reliability and stability of the electrical connection after use.

[0044] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0045] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "connected," "installed," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0046] The preferred embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and the devices and structures not described in detail should be understood as being implemented in a manner common to the art; any possible variations and modifications made by those skilled in the art without departing from the technical solution of the present invention, or equivalent embodiments with equivalent changes, do not affect the essential content of the present invention. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A bending fixture for automotive wiring harness terminals, used for simultaneously bending multiple pins in a single row of pin terminals, characterized in that, include: The rotating frame is configured to rotate horizontally. Two side clamping modules are slidably mounted on a rotating frame and are vertically distributed when the rotating frame is horizontal. Each side clamping module includes a mold base plate slidably mounted on the rotating frame, a bending plate that contacts the bent pins, and a flexible isolation pad. The isolation pad is clamped and fixed between the bending plate and the mold base plate. A correction plate for correcting the pin spacing is embedded in the bending contact surface of the bending plate. The tension claw is slidably mounted on the rotating frame and slides in cooperation with the bending plates in the two side clamping modules along the sliding direction. Through sliding, the sliding contact between the tension claw and the bending plate can switch from flexible contact to rigid contact. In the flexible contact state, the straightening plate and the bending plate are flush, and the rotating frame drives the two side clamping modules to rotate and pre-bend the pins. In the process of sliding to the rigid contact state and continuing to slide, the tension claw first drives the two straightening plates to move closer to each other to correct the pin spacing, and then increases the internal tension force to drive the two bending plates to correct and shape the pins.

2. The automotive wiring harness terminal bending fixture according to claim 1, characterized in that: Both ends of the bending plate along the axial direction of the rotating frame shaft are provided with stepped holes including large and small inner hole sections. A guide sleeve is embedded and fixed in the larger inner hole section of the stepped hole. The tension claw is provided with a corresponding insertion rod on each of the stepped holes on the two bending plates. The insertion rod slides with the guide sleeve, and the insertion rod is in transition fit with the smaller inner hole section in the stepped hole. When the insertion rod slides from the guide sleeve into the smaller inner hole section in the stepped hole, the contact changes from flexible contact to rigid contact.

3. The automotive wiring harness terminal bending fixture according to claim 2, characterized in that: The bending contact surface of the bending plate is provided with a mold groove; multiple guide rods that slide with the bending plate are fixed on the straightening plate, and multiple tension springs are connected between the straightening plate and the mold base plate; under the elastic force of the multiple tension springs, the straightening plate is embedded and pressed tightly in the mold groove, and the straightening plate is flush with the surface of the bending plate.

4. The automotive wiring harness terminal bending fixture according to claim 3, characterized in that: Two insert rods that slide into the same bending plate are fixed with a crossbar between their ends away from the rotation center axis of the rotating frame; the side end of the bending plate is provided with a snap-fit ​​groove that engages with the corresponding crossbar, and the snap-fit ​​groove is connected between the ports of the larger inner hole section of the two stepped holes.

5. The automotive wiring harness terminal bending fixture according to claim 4, characterized in that: The straightening plate has an abutment strip protruding from the other straightening plate at one end away from the rotation center axis of the rotating frame; when the crossbar moves closer to the snap-fit ​​groove and the insert rod slides into the smaller inner hole section of the stepped hole, the crossbar touches the abutment strip, causing the straightening plate to move outward from the mold groove.

6. The automotive wiring harness terminal bending fixture according to claim 4, characterized in that: At least one arc-shaped elastic plate is fixed between the two crossbars; the inner arc surface of the elastic plate faces away from the rotation center axis of the rotating frame; a slider is fixed on the elastic plate and the slider is slidably mounted on the rotating frame.

7. The automotive wiring harness terminal bending fixture according to claim 6, characterized in that: The connection points between the slider, the two crossbars, and the elastic plate are arranged in an isosceles triangle, with the connection point between the slider and the elastic plate located at the vertex of the isosceles triangle.

8. The automotive wiring harness terminal bending fixture according to claim 1, characterized in that: The correction plate is provided with a plurality of partition plates evenly distributed; the partition plates are used to be inserted into the gap between adjacent pins.

9. The automotive wiring harness terminal bending fixture according to claim 1, characterized in that: The back of the bending plate is provided with a back groove, and the isolation pad is embedded in the back groove. The mold base plate is provided with a clamping part for clamping the isolation pad, and the clamping part is embedded in the back groove.

10. The automotive wiring harness terminal bending fixture according to claim 9, characterized in that: Multiple guide posts are fixed in the back groove, and the multiple guide posts slide through and engage with the isolation pad and the mold base plate; each guide post is threaded with a clamping ring, which clamps the isolation pad between the mold base plate and the bending plate.

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