Automobile wiring harness terminal crimping device

Abstract

The present application relates to a terminal crimping device for automotive wiring harnesses, belonging to the field of terminal crimping technology, comprising a frame, a workbench, an upper die, and a bottom die, wherein the workbench is fixed to the frame, the upper die is arranged on the frame, the bottom die is arranged on the workbench, the upper die is located above the bottom die, the bottom die comprises a base, a terminal positioning mechanism, and a limit compensation mechanism, the terminal positioning mechanism is arranged on the base for positioning the terminal, and the limit compensation mechanism is arranged on the base for providing compensation space for the terminal positioning mechanism. The limit compensation mechanism provides space compensation for the terminal positioning mechanism, so that it is not easy to generate extrusion between the terminal and the bottom die, thereby making it difficult for the bottom of the terminal to deform, thereby improving the overall strength of the terminal.

Description

Technical Field

[0001] The present application relates to the technical field of terminal crimping, and in particular to a terminal crimping device for an automobile wiring harness. Background Art

[0002] The terminals inside automotive plug-ins are a basic component of electrical design. After the plug-ins are connected, the current is ultimately transmitted through the male and female terminals inside the plug-ins.

[0003] In the related art, automobile wiring harness terminals are generally used in pairs during use, and the structures of the two are as follows: Figure 1 and Figure 2 For ease of description, a pair of automotive wiring harness terminals is shown as a first terminal 5 and a second terminal 6. The first terminal 5 is sequentially divided into a crimping portion 51, an intermediate portion 52, and a fixing portion 53. The crimping portion 51 is used to crimp the conductor to the wiring harness 54, while the fixing portion 53 is used to connect the first terminal 5 to the vehicle. The intermediate portion 52 and fixing portion 53 of the first terminal 5 are mirror-imaged with the intermediate portion 52 and fixing portion 53 of the second terminal 6 along the center plane between the two wiring harnesses 54. The crimping portion 51 and the intermediate portion 52 are perpendicular to each other, and the intermediate portion 52 and fixing portion 53 are perpendicular to each other. Both the intermediate portion 52 and fixing portion 53 are sheet-shaped. Because each pair of terminals has different shapes and specifications, the crimping process for automotive wiring harness terminals requires different crimping dies. Therefore, the crimping dies are often split into an upper die 3 and a lower die 4. The terminal is placed on the lower die 4, and then the wire core is placed on the terminal. The upper die 3 then presses down to crimp the terminal to the wire core. When the crimping of terminals of the same type is completed, the bottom die 4 is replaced to complete the crimping of terminals of other types.

[0004] Regarding the above-mentioned related technologies, the inventors believe that when crimping the terminals, the upper mold presses down to generate an impact force, and the terminal is subjected to an instantaneous impact force, which will cause extrusion between the terminal and the bottom mold, which can easily cause serious deformation of the bottom of the terminal and produce burrs, thereby reducing the overall strength of the terminal. Summary of the Invention

[0005] In order to improve the above technical problems, the present application provides an automotive wiring harness terminal crimping device.

[0006] This application provides an automotive wiring harness terminal crimping device, which adopts the following technical solutions:

[0007] A terminal crimping device for an automobile wiring harness includes a frame, a workbench, an upper die and a bottom die. The workbench is fixed to the frame, the upper die is arranged on the frame, the bottom die is arranged on the workbench, and the upper die is located above the bottom die. The bottom die includes a base, a terminal positioning mechanism and a limit compensation mechanism. The terminal positioning mechanism is arranged on the base for positioning the terminal, and the limit compensation mechanism is arranged on the base for providing compensation space for the terminal positioning mechanism.

[0008] By adopting the above technical solution, the terminal is placed on the terminal positioning mechanism for fixation, and the upper mold is lowered to rivet the terminal and the wire core. When the upper mold is riveting the terminal and the wire core, due to the impact force, extrusion will occur between the terminal and the terminal positioning mechanism. Due to the setting of the limit compensation mechanism, when the upper mold is pressed down to rivet the terminal and the wire core, the impact force on the terminal will be transmitted to the terminal positioning mechanism. At this time, the limit compensation mechanism is used to provide space compensation for the terminal positioning mechanism, so that it is not easy to produce extrusion between the terminal and the bottom mold, so that the bottom of the terminal is not easy to deform, thereby improving the overall strength of the terminal.

[0009] Preferably, the terminal positioning mechanism includes a clamping block and a pad; the clamping block and the pad are both connected to the limit compensation mechanism, the middle portion of the terminal is placed on the clamping block, and the bent portion between the middle portion of the terminal and the fixed portion is placed on the pad;

[0010] A pressure block is provided on the base near the clamping block, and the connection between the terminal and the wiring harness is located on the pressure block;

[0011] A wire harness fixing block is provided on the base, and the wire harness is clamped in the wire harness fixing block.

[0012] By adopting the above technical solution, the conductor portion of the terminal is clamped within the clamping block, the connection between the conductor and the wiring harness is placed on the pressure block, and the wiring harness is fixed with the harness fixing block. The upper die is then driven downward to rivet the conductor and wiring harness together. The clamping block is used to clamp the conductor, the harness fixing block is used to clamp the wiring harness, and the pressure block provides support for the downward pressure of the bottom die, thereby ensuring reliable riveting between the conductor and wiring harness.

[0013] Preferably, the limit compensation mechanism includes a guide block and a first spring, the guide block is arranged on the base, a guide groove is provided on the guide block, the clamping block is slidably arranged in the guide groove, one end of the first spring is fixedly connected to the side of the guide block away from the pressure block, and the other side of the first spring is fixedly connected to the side wall of the guide groove.

[0014] By adopting the above technical solution, the conductor portion of the terminal is clamped in the clamping block, and the connection between the conductor and the wiring harness is placed on the pressure block. The wiring harness is fixed by the wiring harness fixing block, and then the upper mold is driven downward to rivet the conductor and the wiring harness. When the upper mold rivets the terminal and the wire core, due to the impact force, the terminal and the clamping block will be squeezed. When the clamping block is subjected to the force, it will slide in the guide groove, compressing the first spring, making it less likely to squeeze between the terminal and the bottom mold, thereby preventing the bottom of the terminal from deforming, and protecting both the terminal and the clamping block.

[0015] Preferably, the bottom mold also includes a terminal auxiliary fixing mechanism, the terminal auxiliary fixing mechanism is arranged on the base for fixing to the second terminal, the terminal positioning mechanism is used to fix the first terminal, the terminal auxiliary fixing mechanism and the terminal positioning mechanism are connected by a switching mechanism, the terminal auxiliary fixing mechanism and the terminal positioning mechanism are located on the same side of the pressure block, and the terminal auxiliary fixing mechanism and the terminal positioning mechanism are symmetrically arranged along the center plane between the two.

[0016] By adopting the above technical solution, since the shapes of each pair of two terminals are different, under normal circumstances, the terminals are processed in batches. After the riveting of the first terminals in a batch is completed, the bottom mold is replaced and the second terminals in a batch are processed. The operation is relatively cumbersome. Therefore, the terminal auxiliary fixing mechanism can fix the second terminal to complete the riveting of the second terminal, and the terminal positioning mechanism can fix the first terminal to complete the riveting of the first terminal. The staff can switch the terminal auxiliary fixing mechanism and the terminal positioning mechanism through the switching mechanism. After the riveting of the first terminal is completed, there is no need to disassemble the bottom mold. The terminal positioning mechanism on the base is switched to the terminal auxiliary fixing mechanism through the switching mechanism, and the second terminal can be fixed to complete the riveting of the second terminal. There is no need to disassemble the bottom mold, and the riveting of different types of terminals can be completed, which is convenient and quick to operate.

[0017] Preferably, the switching mechanism includes a driving assembly and a locking assembly, a support plate is mounted on the base, and the driving assembly is mounted on the support plate;

[0018] The driving assembly includes a first driving group and a second driving group, one end of the first driving group is fixed to one end of the support plate, and the other end of the first driving group extends toward the terminal auxiliary fixing mechanism;

[0019] One end of the second driving group is fixed to one end of the support plate, and the other end of the second driving group extends toward the terminal positioning mechanism;

[0020] The locking assembly is mounted on the support plate and is used to lock the terminal positioning mechanism or the terminal auxiliary fixing mechanism;

[0021] When the locking assembly is connected to the terminal positioning mechanism, the first drive group is in a compressed state, and the second drive group is in a non-stressed state;

[0022] When the locking assembly is connected to the terminal auxiliary fixing mechanism, the second driving group is in a compressed state, and the first driving group is in a non-stressed state.

[0023] By adopting the above technical solution, when the first terminal is riveted, the locking assembly is connected to the terminal positioning mechanism. After the riveting of the first terminal is completed, the staff first releases the restriction of the locking assembly on the terminal auxiliary fixing mechanism and the terminal positioning mechanism. At this time, the rebound force of the first drive group pushes the terminal auxiliary fixing mechanism and the terminal positioning mechanism toward the direction of the second drive group. After the terminal auxiliary fixing mechanism moves close to the locking assembly, the terminal auxiliary fixing mechanism can be locked by the locking assembly, and the riveting of the second terminal can be started.

[0024] Preferably, the support plate is hollow inside, and the locking assembly is arranged inside the support plate;

[0025] The locking assembly includes a first clamping block, a second clamping block, a clamping claw and a driving arm. The first clamping block is fixed to the bottom of the terminal auxiliary fixing mechanism, and is passed through the upper bottom plate of the support plate and extends into the interior of the support plate; the second clamping block is fixed to the bottom of the terminal positioning mechanism, and is passed through the upper bottom plate of the support plate and extends into the interior of the support plate; the clamping claw is fixed to the inner bottom surface of the support plate and is used to lock the first clamping block or the second clamping block; the driving arm is connected to the inner wall of the support plate of the clamping claw and is used to drive the clamping claw to open and close.

[0026] By adopting the above technical solution, after the riveting of the first terminal is completed, the staff opens the claw through the driving arm to release the restriction of the claw on the second clamping block. At this time, the rebound force of the first driving group pushes the terminal auxiliary fixing mechanism and the terminal positioning mechanism toward the direction of the second driving group. When the first clamping block moves to the position of the second clamping block, the claw closes and locks the second clamping block.

[0027] Preferably, the clamping claw includes a clamping seat and locking plates hinged on both sides of the clamping seat, the clamping seat is fixed inside the support plate, and a first torsion spring is provided between each locking plate and the clamping seat to control the relative movement of the two locking plates and to press against the side wall of the first clamping block or the second clamping block;

[0028] Both sides of each locking plate that are perpendicular to the clamping seat are provided with guiding inclined surfaces, and the guiding inclined surfaces of each locking plate are inclined toward the first clamping block or the second clamping block.

[0029] By adopting the above technical solution, after the riveting of the first terminal is completed and the restriction of the claw on the second clamping block is released, when the second clamping block is disconnected from the clamping claw and the first clamping block has not entered between the two locking plates, the rebound force of the first driving group will apply a thrust to the first clamping block, and the first clamping block and the guide inclined surface will squeeze the two locking plates in opposite directions. When the first clamping block completely enters between the two locking plates, the squeezing force on the two locking plates disappears, and the first clamping block can be locked by the rebound force of the first torsion spring, thereby completing the switching between the terminal auxiliary fixing mechanism and the terminal positioning mechanism.

[0030] Preferably, an auxiliary groove is formed on a side of the clamping seat facing the locking plate, and both side walls of the auxiliary groove along the movement direction of the first clamping block and the second clamping block are hingedly connected to limit plates, and a second torsion spring is provided between each limit plate and the side wall of the auxiliary groove, and the two limit plates extend in opposite directions;

[0031] When the second torsion spring is not subjected to force, the angle formed by the limiting plate and the bottom of the auxiliary groove is 20 degrees to 45 degrees;

[0032] When the limiting plate is pressed and fits into the bottom of the auxiliary slot, the upper surface of the limiting plate is flush with the upper surface of the clamping seat.

[0033] By adopting the above technical solution, when the first clamping block is disconnected from the clamping claw, the first clamping block is disengaged from the limit plate on the same side, and the two limit plates will be reset under the action of the rebound force of the second torsion spring. When the second clamping block gradually enters the inside of the clamping claw, the limit plate on the same side as the second clamping block will be located at the bottom of the second clamping block, and the other limit plate will be perpendicular to the clamping seat under the thrust of the second clamping block gradually entering the inside of the clamping claw. At this time, the position of the second clamping block can be limited, and the two locking plates can reliably lock the second clamping block.

[0034] In summary, this application includes at least one of the following beneficial technical effects:

[0035] 1. By setting up the terminal positioning mechanism and the limit compensation mechanism, space compensation can be provided for the terminal positioning mechanism, so that it is not easy to be squeezed between the terminal and the bottom mold, so that the bottom of the terminal is not easy to be deformed, thereby improving the overall strength of the terminal;

[0036] 2. By setting up the terminal auxiliary fixing mechanism, different types of terminals can be riveted without removing the bottom mold, which is convenient and quick to operate;

[0037] 3. By providing the auxiliary groove and the limiting plate, it is possible to facilitate the reliable locking of the first clamping block or the second clamping block. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a structural diagram of the first terminal in the related art;

[0039] Figure 2 is a schematic structural diagram of a second terminal in the related art;

[0040] Figure 3 This is a schematic structural diagram of a terminal crimping device according to an embodiment of the present application;

[0041] Figure 4 This is a schematic diagram illustrating the positional relationship between the terminal positioning mechanism and the terminal auxiliary fixing mechanism in an embodiment of the present application;

[0042] Figure 5 This is a schematic diagram of the structure of the switching mechanism in the embodiment of the present application;

[0043] Figure 6 This is a structural diagram illustrating the positional relationship between the drive assembly and the locking assembly in an embodiment of the present application;

[0044] Figure 7 This is a structural diagram illustrating the connection relationship between the locking assembly and the second clamping block in an embodiment of the present application;

[0045] Figure 8 It is a structural diagram used to reflect the locking assembly in an embodiment of the present application.

[0046] Explanation of the accompanying symbols: 1. frame; 2. workbench; 3. upper mold; 4. bottom mold; 41. base; 42. terminal positioning mechanism; 421. clamping block; 422. pressure block; 423. wire harness fixing block; 424. wire harness fixing groove; 425. pad; 43. limit compensation mechanism; 431. guide block; 432. guide groove; 433. first spring; 434. guide rod; 44. terminal auxiliary fixing mechanism; 45. switching mechanism; 46. drive assembly; 461. first drive group; 462. second drive group; 463. mounting bar; 47. locking assembly; 471. first clamping block; 472. second clamping block; 473. claw; 4731. base; 4732. first Locking plate; 4733, second locking plate; 4734, guide slope; 4735, auxiliary groove; 4736, limit plate; 4737, accommodating space; 474, driving arm; 4741, first connecting rod; 4742, second connecting rod; 4743, third connecting rod; 4744, fourth connecting rod; 4745, driving rod; 4746, second spring; 4747, baffle; 475, waist-shaped hole; 48, support plate; 481, bracket; 482, first fixed axis; 483, second fixed axis; 484, first limit hole; 485, second limit hole; 5, first terminal; 51, riveting part; 52, middle part; 53, fixing part; 54, wiring harness; 6, second terminal. DETAILED DESCRIPTION

[0047] The following is combined with Figure 3-8 This application is described in further detail.

[0048] The embodiment of the present application discloses a terminal crimping device for automobile wiring harness. Figure 3 A terminal crimping device for automobile wiring harness includes a frame 1, a workbench 2, an upper die 3 and a bottom die 4. The workbench 2 is fixed on the frame 1, the upper die 3 is arranged on the frame 1, and the bottom die 4 is arranged on the workbench 2. The bottom die 4 can be driven back and forth by a cylinder to facilitate the installation of the terminal on the bottom die 4. When the terminal is riveted, the upper die 3 is located above the bottom die 4.

[0049] Reference Figure 4 The bottom mold 4 includes a base 41, a support plate 48, a terminal positioning mechanism 42, a terminal auxiliary fixing mechanism 44 and a limit compensation mechanism 43. The support plate 48 is slidably arranged on the base 41. In order to improve the accuracy of the sliding of the support plate 48, a slide rail can be set between the support plate 48 and the base 41. The terminal positioning mechanism 42 and the terminal auxiliary fixing mechanism 44 are both slidably arranged on the support plate 48. The terminal positioning mechanism 42 is used to position the first terminal 5, and the terminal auxiliary fixing mechanism 44 is used to position the second terminal 6. The terminal positioning mechanism 42 and the terminal auxiliary fixing mechanism 44 are symmetrically arranged through the center plane between the two. The terminal positioning mechanism 42 and the terminal auxiliary fixing mechanism 44 are both matched with the corresponding limit compensation mechanism 43. The limit compensation mechanism 43 is set on the base 41 to provide compensation space for the positioning mechanism or the terminal auxiliary fixing mechanism 44.

[0050] Since the shapes of the two terminals in each pair are different, when riveting the first terminal 5, the first terminal 5 is placed on the terminal positioning mechanism 42, and then the upper mold 3 is lowered to rivet the first terminal 5 and the wire core. The impact force on the first terminal 5 transmits the force to the terminal positioning mechanism 42. At this time, the terminal positioning mechanism 42 is provided with space compensation through the limit compensation mechanism 43, so that it is not easy to be squeezed between the first terminal 5 and the bottom mold 4, so that the bottom of the first terminal 5 is not easy to be deformed, thereby improving the overall strength of the terminal. The terminal auxiliary fixing mechanism 44 is connected to the terminal positioning mechanism 42 through the switching mechanism 45. After the riveting of the first terminal 5 is completed, the staff switches the terminal auxiliary fixing mechanism 44 and the terminal positioning mechanism 42 through the switching mechanism 45 to realize the riveting of the second terminal 6. In this embodiment, the riveting method of the first terminal 5 and the second terminal 6 is the same.

[0051] It should be noted that the terminal positioning mechanism 42 , the terminal auxiliary fixing mechanism 44 and the limit compensation mechanism 43 can be matched according to the model of the terminal.

[0052] Reference Figure 4The terminal positioning mechanism 42 includes a clamping block 421 and a cushion block 425, both of which are connected to the limit compensation mechanism 43. The middle part 52 of the terminal is placed on the clamping block 421, and the bending part between the middle part 52 of the terminal and the fixing part 53 is located on the cushion block 425. A pressure block 422 and a harness fixing block 423 are fixed on the support plate 48. The pressure block 422 is arranged close to the clamping block 421, and the connection between the harness terminal and the harness 54 is located on the pressure block 422. The harness fixing block 423 is located on the side of the pressure block 422 away from the clamping block 421, and the pressure block 422 and the harness fixing block 423 are located on the same straight line. A harness fixing groove 424 is provided on the harness fixing block 423. When the terminal is crimped, the harness 54 is clamped in the harness fixing groove 424 to position the harness 54, thereby improving the accuracy of the terminal riveting. When riveting terminals of different models, the terminal auxiliary fixing mechanism 44 and the terminal positioning mechanism 42 are switched through the switching mechanism 45 so that the terminal auxiliary fixing mechanism 44 corresponds to the pressure block 422 and the harness fixing block 423 .

[0053] Reference Figure 4 and Figure 5 The limit compensation mechanism 43 includes a guide block 431 and a first spring 433. The guide block 431 is slidably disposed on the support plate 48 via the switching mechanism 45. A guide groove 432 is defined on the side of the guide block 431 away from the support plate 48. The clamping block 421 is slidably disposed within the guide groove 432. The pad 425 is fixed to the side wall of the guide block 431. One end of the first spring 433 is fixedly connected to the side of the guide block 431 away from the pressure block 422, and the other side of the first spring 433 is fixedly connected to the side wall of the guide groove 432. A guide rod 434 is inserted into the first spring 433 to limit the movement trajectory of the clamping block 421, thereby protecting the terminal. One end of the guide rod 434 is fixed to the clamping block 421, and the other end of the guide rod 434 passes through the side wall of the guide groove 432.

[0054] Here, taking the riveting of the first terminal 5 as an example, the conductor portion of the first terminal 5 is clamped in the clamping block 421, and the connection between the conductor and the wiring harness 54 is placed on the pressure block 422. The wiring harness 54 is fixed by the wiring harness fixing block 423, and then the upper mold 3 is driven downward to press the conductor and the wiring harness 54. When the upper mold 3 rivets the first terminal 5 and the wire core, the first terminal 5 is subjected to the impact force of the upper mold 3, and compression will occur between the first terminal 5 and the clamping block 421. After the clamping block 421 is subjected to force, it will slide in the guide groove 432, making it difficult for compression to occur between the first terminal 5 and the bottom mold 4. At this time, the first spring 433 is compressed, and then the clamping block 421 is reset by the rebound force of the first spring 433. The first spring 433 can also apply a thrust to the clamping block 421, so that the first terminal 5 can be reliably clamped on the clamping block 421. The riveting method of the second terminal 6 is the same as that of the first terminal 5.

[0055] Reference Figure 5 and Figure 6 The switching mechanism 45 includes a driving assembly 46 and a locking assembly 47. The driving assembly 46 is disposed on a support plate 48, which is hollow inside. The locking assembly 47 is located inside the support plate 48. When it is necessary to replace the terminal positioning mechanism 42 and the terminal auxiliary fixing mechanism 44, the locking assembly 47 first releases the restriction on the terminal positioning mechanism 42. Then, the driving assembly 46 pushes the terminal positioning mechanism 42 and the terminal auxiliary fixing mechanism 44, so that the locking assembly 47 locks the terminal auxiliary fixing mechanism 44, and the second terminal 6 can be riveted.

[0056] Reference Figure 4 and Figure 6 The drive assembly 46 includes a first drive group 461 and a second drive group 462. Each of the first and second drive groups 461 and 462 is composed of multiple parallel springs to enhance their resilience. Mounting strips 463 are fixed to both ends of the support plate 48 along its length. One end of the first drive group 461 is fixed to the mounting strip 463, while the other end of the first drive group 461 extends toward the auxiliary terminal fixing mechanism 44. One end of the second drive group 462 is fixed to the mounting strip 463 at the other end of the support plate 48, while the other end of the second drive group 462 extends toward the terminal positioning mechanism 42.

[0057] When the first terminal 5 is riveted, the pressure block 422 and the harness fixing block 423 both correspond to the terminal positioning mechanism 42. At this time, the locking assembly 47 is connected to the terminal positioning mechanism 42, the first drive group 461 is in a compressed state, and the end of the first drive group 461 facing the terminal auxiliary fixing mechanism 44 abuts against the side wall of the terminal auxiliary fixing mechanism 44. At the same time, the second drive group 462 is in a non-stressed state. After the first terminal 5 is riveted, the staff first releases the restriction of the locking assembly 47 on the terminal auxiliary fixing mechanism 44 and the terminal positioning mechanism 42. At this time, the rebound force of the first drive group 461 pushes the terminal auxiliary fixing mechanism 44 and the terminal positioning mechanism 42 toward the direction of the second drive group 462. The first drive group 461 gradually disconnects from the terminal auxiliary fixing mechanism 44, and the second drive group 462 gradually abuts against the terminal positioning mechanism 42. After the terminal auxiliary fixing mechanism 44 moves close to the locking assembly 47, the terminal auxiliary fixing mechanism 44 can be locked by the locking assembly 47, and the riveting of the second terminal 6 begins.

[0058] On the other hand, when the second terminal 6 is being riveted, the pressure block 422 and the harness fixing block 423 both correspond to the terminal auxiliary fixing mechanism 44. At this time, the locking assembly 47 is connected to the terminal auxiliary fixing mechanism 44, the second drive group 462 is in a compressed state, and the end of the second drive group 462 facing the terminal positioning mechanism 42 abuts against the side wall of the terminal positioning mechanism 42. At the same time, the first drive group 461 is in an unstressed state. After the second terminal 6 is riveted, the staff first releases the restriction of the locking assembly 47 on the terminal auxiliary fixing mechanism 44 and the terminal positioning mechanism 42. At this time, the rebound force of the second drive group 462 pushes the terminal auxiliary fixing mechanism 44 and the terminal positioning mechanism 42 toward the direction of the first drive group 461. The second drive group 462 gradually disconnects from the terminal positioning mechanism 42, and the first drive group 461 gradually abuts against the terminal auxiliary fixing mechanism 44. After the terminal positioning mechanism 42 moves close to the locking assembly 47, the terminal positioning mechanism 42 can be locked by the locking assembly 47, and the riveting of the first terminal 5 begins. Repeat this process repeatedly.

[0059] Reference Figure 6 and Figure 7, the locking component 47 includes a first clamping block 471, a second clamping block 472, a claw 473 and a driving arm 474. A waist-shaped hole 475 is formed in the support plate 48, and the waist-shaped hole 475 is formed along the moving direction of the terminal auxiliary fixing mechanism 44 and the terminal positioning mechanism 42. The first clamping block 471 is fixed to the bottom of the terminal auxiliary fixing mechanism 44 and extends into the interior of the support plate 48 through the waist-shaped hole 475. The second clamping block 472 is fixed to the bottom of the terminal positioning mechanism 42 and extends into the interior of the support plate 48 through the waist-shaped hole 475. The claw 473 is fixed to the inner bottom surface of the support plate 48 for locking the first clamping block 471 or the second clamping block 472, and the driving arm 474 is connected to the inner wall of the support plate 48 of the claw 473 for driving the claw 473 to open and close.

[0060] Referring to Figure 7 and Figure 8 , the claw 473 includes a clamping seat 4731 and locking plates hinged to both sides of the clamping seat 4731. The clamping seat 4731 is fixed inside the support plate 48, and a first torsion spring is arranged between the locking plates and the clamping seat 4731. By the first torsion spring, the two locking plates are subjected to forces in opposite directions, so as to lock the first clamping block 471 or the second clamping block 472 to realize the riveting of the terminal. Each locking plate is in a "C" shape, so a receiving space 4737 is formed between the two locking plates, and the first clamping block 471 or the second clamping block 472 is located in the receiving space 4737 to limit the first clamping block 471 and the second clamping block 472. In order to facilitate the first clamping block 471 or the second clamping block 472 to smoothly enter between the two locking plates, guide inclined surfaces 4734 are arranged on both sides of each locking plate perpendicular to the clamping seat 4731, and the guide inclined surfaces 4734 of the two locking plates are inclined towards the locking plate in the opposite position, so that the first clamping block 471 or the second clamping block 472 can be抵靠 the guide inclined surface 4734 by the thrust received and open the two locking plates, so that the first clamping block 471 or the second clamping block 472 enters the receiving space 4737. When the first clamping block 471 or the second clamping block 472 enters the receiving space 4737, the extrusion force received by the two locking plates disappears, and the two locking plates can be reset by the resilience of the first torsion spring to lock the first clamping block 471 or the second clamping block 472.

[0061] Referring to Figure 8The side of the retaining plate 4731 facing the locking plate defines an auxiliary slot 4735. The auxiliary slot 4735 extends in the direction of movement of the first retaining block 471 and the second retaining block 472. Limiting plates 4736 are hingedly connected to both side walls of the auxiliary slot 4735, extending in opposite directions. A second torsion spring is provided at the junction between each limiting plate 4736 and the side wall of the auxiliary slot 4735. This allows the two limiting plates 4736 to be forced toward the bottom of the auxiliary slot 4735 due to the rebound force of the second torsion spring. When the second torsion spring is unloaded, the angle formed between the limiting plates 4736 and the bottom of the auxiliary slot 4735 is between 20 and 45 degrees, and in this embodiment, preferably 30 degrees. As the first clamping block 471 gradually enters the accommodation space 4737, the limiting plate 4736 on the same side as the first clamping block 471 will be located at the bottom of the first clamping block 471. At this time, the upper surface of the limiting plate 4736 on the same side as the first clamping block 471 is flush with the upper surface of the clamping seat 4731. Because the other limiting plate 4736 is in an inclined position, as the first clamping block 471 gradually enters the accommodation space 4737, the limiting plate 4736 on the same side as the second clamping block 472 gradually moves toward a position perpendicular to the clamping seat 4731. When the first clamping block 471 fully enters the accommodation space 4737, the limiting plate 4736 on the same side as the second clamping block 472 is positioned perpendicular to the clamping seat 4731. When switching between the terminal auxiliary fixing mechanism 44 and the terminal positioning mechanism 42, the two limiting plates 4736 are reset due to the rebound force of the second torsion spring.

[0062] Reference Figure 8 , the two locking plates are divided into a first locking plate 4732 and a second locking plate 4733. The driving arm 474 includes a first connecting rod 4741, a second connecting rod 4742, a third connecting rod 4743, a fourth connecting rod 4744 and a driving rod 4745. One end of the first connecting rod 4741 is hinged to the side wall of the first locking plate 4732 away from the base 4731, the second connecting rod 4742 is hinged to the other end of the first connecting rod 4741, one end of the third connecting rod 4743 is hinged to the side wall of the second locking plate 4733 away from the base 4731, and the third connecting rod 4744 is hinged to the side wall of the second locking plate 4733 away from the base 4731. One end of the fourth connecting rod 4744 is hinged to the other end of the third connecting rod 4743, and the end of the second connecting rod 4742 away from the first connecting rod 4741 and the end of the fourth connecting rod 4744 away from the third connecting rod 4743 are hinged to one end of the driving rod 4745 at the same time. The driving rod 4745 slides through the bottom plate of the support plate 48 at one end away from the second connecting rod 4742 and the fourth connecting rod 4744, and extends out of the support plate 48 and extends toward the base 41.

[0063] A bracket 481 is provided within the support plate 48. A first connecting rod 4741, a second connecting rod 4742, a third connecting rod 4743, and a fourth connecting rod 4744 are all connected to the bracket 481. The first connecting rod 4741 and the third connecting rod 4743 are each L-shaped. First fixed shafts 482 are provided at the corners of the first and third connecting rods 4741 and 4743. The bracket 481 is provided with first retaining holes 484 that mate with the corresponding first fixed shafts 482. The two first retaining holes 484 are vertically defined. Second fixed shafts 483 are connected to the hinges between the first and second connecting rods 4741 and 4742, as well as the hinges between the third and fourth connecting rods 4743 and 4744. Second retaining holes 485 are provided on the bracket 481 that mate with the corresponding second fixed shafts 483. The two first retaining holes 484 are horizontally defined.

[0064] A baffle 4747 is fixedly mounted on the driving rod 4745, and the baffle 4747 is located in the accommodating space 4737. A second spring 4746 is mounted on the end of the driving rod 4745 that extends into the accommodating space 4737. One end of the second spring 4746 is abutted against the connection between the second connecting rod 4742 and the fourth connecting rod 4744, and the other end of the second spring 4746 is abutted against the baffle 4747.

[0065] The staff manually presses the driving rod 4745, and the driving rod 4745 can squeeze the second spring 4746 through the baffle 4747, and the second connecting rod 4742 and the fourth connecting rod 4744 will move in the direction away from the second spring 4746, and the two second fixed shafts 483 will move in opposite directions along the second limiting hole 485. At this time, the second connecting rod 4742 pulls the first connecting rod 4741 to move, and the fourth connecting rod 4744 pulls the third connecting rod 4743 to move, so that the two first fixed shafts 482 both move along the first limiting hole 484 toward the base 41. During the movement of the first connecting rod 4741 and the third connecting rod 4743, a pulling force will be applied to the first locking plate 4732 and the second locking plate 4733, so that the claw 473 can be opened to facilitate the switching of the position of the terminal auxiliary fixing mechanism 44 and the terminal positioning mechanism 42. When the staff releases the driving rod 4745, the second spring 4746 will drive the baffle 4747 to reset through its own rebound force. At this time, the second connecting rod 4742 and the fourth connecting rod 4744 will reset, and the first connecting rod 4741 and the third connecting rod 4743 will reset at the same time. The first locking plate 4732 and the second locking plate 4733 will reset synchronously, and the first clamping block 471 or the second clamping block 472 can be clamped.

[0066] The implementation principle of an automotive wiring harness terminal crimping device in an embodiment of the present application is as follows: when riveting the first terminal 5, the first terminal 5 is fixed on the terminal positioning mechanism 42, and then the first terminal 5 is riveted by pressing down the upper mold 3. During the riveting process, the first terminal 5 and the terminal positioning mechanism 42 are protected by the limit compensation mechanism 43. When the riveting of the first terminal 5 is completed, the driving rod 4745 is manually pressed to open the claw 473, and the terminal auxiliary fixing mechanism 44 and the terminal positioning mechanism 42 can be switched through the first driving group 461. After the switching is completed, the claw 473 will automatically lock the second clamping block 472 to start riveting the second terminal 6.

[0067] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An automobile wiring harness terminal crimping device, comprising a frame (1), a workbench (2), an upper die (3) and a bottom die (4), wherein the workbench (2) is fixed to the frame (1), the upper die (3) is arranged on the frame (1), the bottom die (4) is arranged on the workbench (2), and the upper die (3) is located above the bottom die (4), characterized in that: The bottom mold (4) includes a base (41), a terminal positioning mechanism (42) and a limit compensation mechanism (43); the terminal positioning mechanism (42) is arranged on the base (41) for positioning the terminal, and the limit compensation mechanism (43) is arranged on the base (41) for providing compensation space for the terminal positioning mechanism (42); the terminal positioning mechanism (42) includes a clamping block (421) and a cushion block (425); the clamping block (421) and the cushion block (425) are both connected to the limit compensation mechanism (43); the middle portion (52) of the terminal is placed on the clamping block (421), and the bending portion between the middle portion (52) and the fixed portion (53) of the terminal is placed on the cushion block (425); A pressure block (422) is provided on the base (41) and close to the clamping block (421), and the connection between the terminal and the wiring harness (54) is located on the pressure block (422); A wiring harness fixing block (423) is provided on the base (41), and the wiring harness (54) is clamped in the wiring harness fixing block (423); the bottom mold (4) also includes a terminal auxiliary fixing mechanism (44), the terminal auxiliary fixing mechanism (44) is provided on the base (41) for fixing the second terminal (6), the terminal positioning mechanism (42) is used to fix the first terminal (5), the terminal auxiliary fixing mechanism (44) and the terminal positioning mechanism (42) are connected through a switching mechanism (45), the terminal auxiliary fixing mechanism (44) and the terminal positioning mechanism (42) are located on the same side of the pressure block (422), and the terminal auxiliary fixing mechanism (44) and the terminal positioning mechanism (42) are symmetrically arranged along the center plane between the two.

2. The automotive wiring harness terminal crimping device according to claim 1, characterized in that: The limit compensation mechanism (43) includes a guide block (431) and a first spring (433), wherein the guide block (431) is arranged on the base (41), a guide groove (432) is provided on the guide block (431), the clamping block (421) is slidably arranged in the guide groove (432), one end of the first spring (433) is fixedly connected to a side of the guide block (431) away from the pressure block (422), and the other side of the first spring (433) is fixedly connected to the side wall of the guide groove (432).

3. The automotive wiring harness terminal crimping device according to claim 1, characterized in that: The switching mechanism (45) includes a driving assembly (46) and a locking assembly (47); a support plate (48) is mounted on the base (41); and the driving assembly (46) is mounted on the support plate (48); The driving assembly (46) includes a first driving group (461) and a second driving group (462), one end of the first driving group (461) is fixed to one end of the support plate (48), and the other end of the first driving group (461) extends toward the terminal auxiliary fixing mechanism (44); One end of the second drive group (462) is fixed to one end of the support plate (48), and the other end of the second drive group (462) extends toward the terminal positioning mechanism (42); The locking assembly (47) is mounted on the support plate (48) and is used to lock the terminal positioning mechanism (42) or the terminal auxiliary fixing mechanism (44); When the locking assembly (47) is connected to the terminal positioning mechanism (42), the first drive group (461) is in a compressed state, and the second drive group (462) is in an unstressed state; When the locking assembly (47) is connected to the terminal auxiliary fixing mechanism (44), the second drive group (462) is in a compressed state, and the first drive group (461) is in an unstressed state.

4. The automotive wiring harness terminal crimping device according to claim 3, characterized in that: The support plate (48) is hollow inside, and the locking assembly (47) is arranged inside the support plate (48); The locking assembly (47) includes a first clamping block (471), a second clamping block (472), a clamping claw (473) and a driving arm (474), wherein the first clamping block (471) is fixed to the bottom of the terminal auxiliary fixing mechanism (44), and is provided through the upper bottom plate of the support plate (48) and extends into the interior of the support plate (48); the second clamping block (472) is fixed to the bottom of the terminal positioning mechanism (42), and is provided through the upper bottom plate of the support plate (48) and extends into the interior of the support plate (48); the clamping claw (473) is fixed to the inner bottom surface of the support plate (48) and is used to lock the first clamping block (471) or the second clamping block (472); the driving arm (474) is connected to the inner wall of the support plate (48) of the clamping claw (473) and is used to drive the clamping claw (473) to open and close.

5. The automotive wiring harness terminal crimping device according to claim 4, characterized in that: The clamping claw (473) includes a clamping seat (4731) and locking plates hinged on both sides of the clamping seat (4731), the clamping seat (4731) is fixed inside the support plate (48), and a first torsion spring is provided between each locking plate and the clamping seat (4731) to control the relative movement of the two locking plates and to press against the side wall of the first clamping block (471) or the second clamping block (472); Each locking plate is provided with a guide slope (4734) on both sides perpendicular to the clamping seat (4731), and the guide slope (4734) of each locking plate is inclined toward the first clamping block (471) or the second clamping block (472).

6. The automotive wiring harness terminal crimping device according to claim 5, characterized in that: An auxiliary groove (4735) is provided on one side of the clamping seat (4731) facing the locking plate. The two side walls of the auxiliary groove (4735) along the movement direction of the first clamping block (471) and the second clamping block (472) are hingedly connected to limit plates (4736). A second torsion spring is provided between each limit plate (4736) and the side wall of the auxiliary groove (4735). The two limit plates (4736) extend in opposite directions. When the second torsion spring is not subjected to force, the angle formed by the limiting plate (4736) and the bottom of the auxiliary groove (4735) is 20 degrees to 45 degrees; When the limiting plate (4736) is pressed and fits against the bottom of the auxiliary groove (4735), the upper surface of the limiting plate (4736) is flush with the upper surface of the clamping seat (4731).

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