Wire harness terminal welding device and welding assembly

Abstract

The invention discloses a wire harness terminal welding device and a welding assembly, and relates to the technical field of welding. To solve efficiency problems; the device specifically comprises two variable-pitch modules, the inner side of each variable-pitch module is in transmission connection with a plurality of sliding blocks, each variable-pitch module comprises a first support and a transmission assembly arranged on the outer side of the first support, the side walls of the two variable-pitch modules are provided with the same adjusting linkage assembly, and a welding head is fixed to the outer wall of the bottom of the sliding block located at the top. And the sliding block is positioned above the sliding block at the bottom. According to the wire harness welding device, the two variable-pitch modules are arranged and are provided with the multiple sliding blocks, so that multiple wire harnesses and terminals can be welded at a time, the batch production efficiency can be improved, and by arranging the transmission assembly, on one hand, adjustment can be conducted according to different pitch requirements, the applicability of the device is improved, and on the other hand, the production efficiency is improved. And on the other hand, the multiple sliding blocks are adjusted synchronously, the use convenience is improved, the adjusted intervals are equal, and the consistency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of welding, and in particular to a wire harness terminal welding device and a welding assembly. Background Art

[0002] In order to facilitate the connection between a wire harness and an electrical device or electrical component, and ensure the sufficient contact and reliable contact of the connection, a wire harness terminal is first welded to the end of the wire harness, so that the wire harness can be connected to the wiring terminal of the electrical device or electrical component by using the wire harness terminal.

[0003] After retrieval, a patent with the Chinese patent publication number CN112448249A discloses a terminal wire harness positioning welding device, including a machine table, a terminal horizontal transfer table, a support block, a wire harness and terminal pressing mechanism, a wire harness induction mechanism, a cutting mechanism, a welding head, and a welding head lifting mechanism. The terminal horizontal transfer table, the support block, the wire harness and terminal pressing mechanism, the wire harness induction mechanism, the cutting mechanism, and the welding head lifting mechanism are fixed on the machine table, and the welding head is installed on the welding head lifting mechanism.

[0004] The above patent has the following deficiencies: It can only weld and fix a single terminal and a single wire harness in a single operation. In mass production, the production volume is large, which will lead to a low overall production efficiency.

[0005] Therefore, the present invention proposes a wire harness terminal welding device and a welding assembly. Summary of the Invention

[0006] The purpose of the present invention is to solve the deficiencies existing in the prior art, and to propose a wire harness terminal welding device and a welding assembly.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A wire harness terminal welding assembly includes two groups of variable pitch modules.

[0009] A plurality of sliders are drivingly connected to the inner side of each group of variable pitch modules. The variable pitch module includes a first bracket and a transmission component arranged outside the first bracket, and a set of adjustment linkage components are arranged on the side walls of the two groups of variable pitch modules.

[0010] A welding head is fixed to the bottom outer wall of the slider at the top. A terminal card slot for limiting the terminal and a wire harness slot for limiting the wire harness are respectively opened above the slider at the bottom. Clamping components are arranged on both sides of the wire harness slot.

[0011] Preferably: The transmission assembly includes a first slide bar fixed inside the first bracket and slidably fitted to the inner wall of the slider, as well as two first connecting rods and multiple second connecting rods. A convex post is welded to the side wall of the slider. The two sliders at the ends are rotatably connected to one end of the first connecting rod through the convex posts welded to their tops, and the remaining sliders are rotatably connected to the middle of the second connecting rod through the convex posts welded to their tops. Moreover, the multiple second connecting rods are rotatably connected end to end through hinge rods, and the other end of the first connecting rod is rotatably connected to the ends of the two second connecting rods at the ends.

[0012] Furthermore: The transmission assembly further includes a first slide bar, a motor, and a lead screw. The first slide bar is fixed inside the first bracket, and the lead screw is rotatably connected inside the first bracket. The motor is fixed to the outer side wall of the first bracket through bolts, and the telescopic end of the motor is connected to the end of the lead screw through a coupling.

[0013] Based on the foregoing solution: One of the middle sliders is fixed to the outer wall of the first slide bar, and the remaining sliders are slidably connected to the outer wall of the first slide bar;

[0014] The two sliders at both ends are respectively connected to both sides of the lead screw through threads with opposite helix directions.

[0015] A better solution in the foregoing solution is: The clamping assembly includes a clamping plate slidably connected to one group of sliders through a first guide rod and an inclined block two fixed to the side wall of the clamping plate. A first spring is buckled inside the end of the first guide rod, and the other end of the first spring is buckled to the side wall of this group of sliders. The bottom of the other group of sliders is connected to an inclined block one through an elastic strut, and the inclined block one is located directly above the inclined block two.

[0016] As a further solution of the present invention: The adjustment linkage assembly includes multiple belt pulleys and a synchronous belt drivingly engaged with the outer walls of the multiple belt pulleys.

[0017] Meanwhile, two opposed support blocks are slidably connected to the end of each first bracket through a second slide bar. A second spring is buckled between the relative sides of the support block and the first bracket. Among them, multiple belt pulleys are respectively fixed to the outer wall of the lead screw and rotatably connected to the side wall of the support block.

[0018] A wire harness terminal welding device includes a wire harness terminal welding assembly, which includes a base and a gantry fixed to the top of the base through bolts. The top of the base is connected to the bottom of one of the variable pitch modules through a second bracket, and the lower surface of the top of the gantry is provided with a lifting assembly, and the moving end of the lifting assembly is connected to the top of the other variable pitch module through another second bracket.

[0019] Meanwhile, the lifting assembly includes a lifting plate, a first movable pulley, and a second movable pulley. The first movable pulley and the second movable pulley are respectively rotatably connected to the bottom of the lifting plate through a first wheel frame and a second wheel frame. And the lifting plate is slidably connected to the inner wall of the gantry through a second guiding rod welded to its top. And a telescopic device is fixed to the outer wall of the top of the gantry through bolts, and the telescopic end of the telescopic device is fixed to the outer wall of the top of the lifting plate through bolts. The lifting assembly further includes a first cable and a second cable. One ends of the first cable and the second cable are respectively fixed to the outer walls on both sides of the second bracket at the top. The other end of the first cable is wound around the top of the first movable pulley and then fixed to the outer wall of the top of the base. The other end of the second cable is wound around the bottom of the second movable pulley and then fixed to the lower surface of the top of the gantry.

[0020] As a more optimal solution of the present invention: the first movable pulley is rotatably connected to the first wheel frame through a connecting shaft, the second movable pulley is rotatably connected to the second wheel frame through another connecting shaft, and one ends of the two connecting shafts are provided with overspeed limiting components, and the other ends of the two connecting shafts are provided with overspeed limiting components;

[0021] The overspeed limiting component includes a clamping wheel fixed to the outer wall of the connecting shaft and a fixed ring fixed to the outer walls of the first wheel frame and the second wheel frame. A friction ring is fixed to the inner side wall of the fixed ring. A friction block that can cooperate with the friction ring is radially slidably connected to the clamping wheel, and the end face of the friction block is connected to the outer wall of the connecting shaft through a tension spring;

[0022] The locking component includes a clamping plate fixed to the end face of the connecting shaft and a moving block. Key-shaped protrusions are welded to the outer walls of the first wheel frame and the second wheel frame. The moving block is in clearance fit with the outer wall of the key-shaped protrusion. A circular array of locking components is provided on the inner wall of the clamping plate. A mating groove that is snap-fitted with the mating groove is fixed to the side wall of the moving block;

[0023] An electromagnet two is fixed to the end face of the moving block through bolts. An electromagnet one is arranged on one side of the electromagnet two. The electromagnet one is fixed to the first wheel frame and the second wheel frame. And a return spring is buckled on the outer wall of one side of the first wheel frame and the second wheel frame. The other end of the return spring is buckled on the side wall of the moving block;

[0024] The electromagnet one and the electromagnet two are connected in series to the power supply circuit of the telescopic device.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. In the present invention, by setting two groups of variable pitch modules, which are equipped with multiple sliders, it is possible to weld multiple wire harnesses and terminals at one time, improving the efficiency of batch production. And by setting a transmission assembly, on the one hand, it can be adjusted according to different pitch requirements, increasing the applicability of the device. On the other hand, the adjustment of multiple sliders is carried out synchronously, increasing the convenience of use, and the adjusted pitches are all equal, increasing the consistency.

[0027] 2. In the present invention, by providing a clamping assembly, the wire harness can be clamped, which increases the stability during welding, thereby improving the welding precision. Moreover, by utilizing the cooperation between the first inclined block and the second inclined block to drive the clamping plate, the clamping power can be derived from the movement of the slider, thus simplifying the layout of the power source, reducing costs, and also increasing the tightness and synchronism of the connection between each step.

[0028] 3. In the present invention, by providing an adjustment linkage assembly, when one of the lead screws rotates, the other lead screw can be driven to move synchronously through the transmission cooperation of the belt pulley and the synchronous belt, so as to realize the synchronous and same-speed adjustment of the two groups of sliders, ensuring the matching of the welding head with the wire harness and terminal positions. Additionally, when the positions of the two groups of sliders change, the belt pulley can also be tensioned through the elastic support of the second spring on the support block, ensuring the reliability of the linkage.

[0029] 4. In the present invention, by using the lifting assembly to drive the lifting of the second bracket, and the lifting assembly realizes the drive of the second bracket through the cooperation of the first movable pulley and the first cable and the cooperation of the second movable pulley and the second cable, so that the lifting speed of the second bracket is twice the lifting speed of the lifting plate. Thus, when the speed of the telescopic device is constant, the moving speed of the second bracket can be faster, resulting in higher welding efficiency.

[0030] 5. In the present invention, by providing an overspeed limit assembly, by utilizing the characteristic that the rotational speed of the connecting shaft increases during overspeed, it can not only ensure unobstructed operation at normal speed but also achieve negative feedback inhibition at high speed, thereby preventing damage caused by high-speed collisions.

[0031] 6. In the present invention, by providing the clamping rod and the mating groove, it can lock the lifting of the device when the telescopic device is in a non-working state, thereby preventing sliding due to gravity and increasing the stability of the device. Moreover, by using the first electromagnet and the second electromagnet to drive the moving block and connecting the first electromagnet and the second electromagnet in series to the power supply circuit of the telescopic device, automatic control of the locking, release, and starting state of the telescopic device can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the overall structural schematic diagram of a wire harness terminal welding assembly proposed by the present invention;

[0033] Figure 2 is the partial structural schematic diagram of a wire harness terminal welding assembly proposed by the present invention;

[0034] Figure 3 is the partial sectional structural schematic diagram of a wire harness terminal welding assembly proposed by the present invention;

[0035] Figure 4 is the structural schematic diagram of the transmission assembly of a wire harness terminal welding assembly proposed by the present invention;

[0036] Figure 5 Schematic cross-sectional structure diagram of the transmission component of a wire harness terminal welding assembly proposed by the present invention;

[0037] Figure 6 Schematic structure diagram of the adjustment linkage component of a wire harness terminal welding assembly proposed by the present invention;

[0038] Figure 7 Schematic overall structure diagram of a wire harness terminal welding device proposed by the present invention;

[0039] Figure 8 Schematic cross-sectional overall structure diagram of a wire harness terminal welding device proposed by the present invention. Figure 9 Schematic overall structure diagram of the overspeed limit component and the locking component of a wire harness terminal welding device proposed by the present invention; Figure 10 Schematic cross-sectional structure diagram of the overspeed limit component of a wire harness terminal welding device proposed by the present invention; Figure 11 Schematic cross-sectional structure diagram of the locking component of a wire harness terminal welding device proposed by the present invention.

[0040] In the figure: 1, variable pitch module; 2, slider; 3, transmission component; 4, bracket one; 5, adjustment linkage component; 6, welding head; 7, wire harness groove; 8, clamping component; 9, terminal card slot; 10, elastic strut; 11, inclined plane block one; 12, spring one; 13, guide rod one; 14, inclined plane block two; 15, clamping plate; 16, slide rod one; 17, convex column; 18, connecting rod one; 19, articulated rod; 20, connecting rod two; 21, motor; 22, lead screw; 23, support block; 24, spring two; 25, slide rod two; 26, belt pulley; 27, synchronous belt; 28, gantry; 29, lifting component; 30, base; 31, bracket two; 32, telescopic device; 33, guide rod two; 34, lifting plate; 35, wheel frame one; 36, movable pulley one; 37, cable one; 38, movable pulley two; 39, cable two; 40, wheel frame two; 41, connecting shaft; 42, overspeed limit component; 43, locking component; 44, tension spring; 45, friction block; 46, friction ring; 47, fixed ring; 48, locking wheel; 49, return spring; 50, electromagnet one; 51, electromagnet two; 52, moving block; 53, mating groove; 54, clamping plate; 55, clamping rod; 56, key-shaped protrusion. Specific embodiments

[0041] The technical solutions of the present invention will be further described in detail below in conjunction with specific embodiments.

[0042] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation of the present invention.

[0043] Embodiment 1:

[0044] A wiring harness terminal welding assembly, as Figures 1-8 shown, includes two groups of variable pitch modules 1. A plurality of sliders 2 are drivingly connected to the inner sides of each group of variable pitch modules 1. The variable pitch module 1 includes a first bracket 4 and a transmission assembly 3 provided on the outer side of the first bracket 4. And a set of adjustment linkage assemblies 5 are provided on the side walls of the two groups of variable pitch modules 1.

[0045] A welding head 6 is fixed to the bottom outer wall of the slider 2 at the top. And a terminal card slot 9 for limiting the terminal and a wire harness slot 7 for limiting the wire harness are respectively formed above the slider 2 at the bottom. And clamping assemblies 8 are provided on both sides of the wire harness slot 7.

[0046] The transmission assembly 3 includes a first slide bar 16 fixed inside the first bracket 4 and slidably fitted to the inner wall of the slider 2, two first connecting rods 18 and a plurality of second connecting rods 20. A convex column 17 is welded to the side wall of the slider 2. The two sliders 2 at the ends are rotatably connected to one end of the first connecting rod 18 through the convex column 17 welded to their tops. The remaining sliders 2 are rotatably connected to the middle of the second connecting rod 20 through the convex column 17 welded to their tops. And the plurality of second connecting rods 20 are rotatably connected end to end through a hinge rod 19. The other end of the first connecting rod 18 is rotatably connected to the ends of the two second connecting rods 20 at the ends.

[0047] During use, a plurality of terminals are respectively placed inside the terminal card slot 9 of the bottom slider 2. Then the wire harness is placed inside the wire harness slot 7, and the contact position between the end of the wire harness and the terminal meets the welding requirements. Subsequently, control the slider 2 at the top to descend so that the welding head 6 descends to the position where the wire harness contacts the terminal, and welding can be performed. And because the diameters of the wire harnesses are different and different spacings are required, the slider 2 can be moved. Through the connection action of the first connecting rod 18 and the second connecting rod 20, the spacings between the plurality of sliders 2 are adjusted and the spacings always remain equal.

[0048] In this device, by providing two groups of variable pitch modules 1 which are equipped with a plurality of sliders 2, it can realize welding of multiple wire harnesses and terminals at one time, improve the efficiency of batch production. And by providing the transmission assembly 3, on the one hand, it can be adjusted according to different spacing requirements, increasing the applicability of the device. On the other hand, the adjustment of the plurality of sliders 2 is carried out synchronously, increasing the convenience of use, and the adjusted spacings are all equal, increasing the consistency.

[0049] To solve the problem of adjustment drive; as Figure 4 、 5 shown, the transmission assembly 3 further includes a first slide bar 16, a motor 21 and a lead screw 22. The first slide bar 16 is fixed to the inner side of the first bracket 4, and the lead screw 22 is rotatably connected to the inner side of the first bracket 4. The motor 21 is fixed to the outer wall of the first bracket 4 by bolts, and the telescopic end of the motor 21 is connected to the end of the lead screw 22 through a coupling.

[0050] One of the middle sliders 2 is fixed to the outer wall of the first slide bar 16, and the remaining sliders 2 are slidably connected to the outer wall of the first slide bar 16.

[0051] The two sliders 2 at both ends are respectively connected to both sides of the lead screw 22 through threads with opposite helix directions.

[0052] When the motor 21 is started, it can drive the lead screw 22 to rotate, thereby driving the two sliders 2 at both ends to move in the same speed and opposite directions through the threaded connection. And because the middle slider 2 is fixed, the plurality of sliders 2 are adjusted.

[0053] To solve the problem of wire harness fixing; as Figure 3 、 4 shown, the clamping assembly 8 includes a clamping plate 15 slidably connected to one group of sliders 2 through a first guide rod 13 and an inclined block two 14 fixed to the side wall of the clamping plate 15. The inner side of the end of the first guide rod 13 is buckled with a first spring 12, and the other end of the first spring 12 is buckled to the side wall of this group of sliders 2. The bottom of the other group of sliders 2 is connected with an inclined block one 11 through an elastic strut 10, and the inclined block one 11 is located directly above the inclined block two 14.

[0054] When the top slider 2 descends to the point where the inclined block one 11 cooperates with the inclined block two 14, the slider 2 continues to descend. At this time, the inclined block one 11 will cooperate with the inclined block two 14 to make the clamping plate 15 move inward to clamp the wire harness. After stable clamping, the slider 2 continues to descend, and the elastic strut 10 contracts until reaching the welding station for welding.

[0055] In this device, by setting the clamping assembly 8, the wire harness can be clamped, the stability during welding is increased, thereby improving the welding precision. And by using the cooperation between the inclined block one 11 and the inclined block two 14 to realize the drive of the clamping plate 15, the clamping power can be derived from the movement of the slider 2, thus simplifying the layout of the power source, reducing costs and increasing the tightness and synchronism of the connection between each step.

[0056] To solve the problem of adjustment precision; as Figure 6 shown, the adjustment linkage assembly 5 includes a plurality of belt pulleys 26 and a timing belt 27 drivingly engaged with the outer walls of the plurality of belt pulleys 26.

[0057] Each end of each bracket 4 is slidably connected with two opposed support blocks 23 through a second slide bar 25. A second spring 24 is buckled on the opposite side of the support block 23 and the bracket 4. A plurality of the belt pulleys 26 are respectively fixed on the outer wall of the lead screw 22 and rotatably connected to the side wall of the support block 23.

[0058] In this device, by arranging the adjustment linkage assembly 5, when one of the lead screws 22 rotates, the other lead screw 22 can be driven to move synchronously through the transmission cooperation of the belt pulley 26 and the synchronous belt 27, so as to realize the synchronous and same-speed adjustment of the two groups of sliders 2, ensure the matching of the position of the welding head 6 with the wire harness and the terminal. In addition, when the positions of the two groups of sliders 2 change, the belt pulley 26 can also be tensioned by the elastic support of the second spring 24 on the support block 23 to ensure the reliability of the linkage.

[0059] When this embodiment is in use, first, determine the required distance between two adjacent sliders 2 according to the diameter of the welded wire harness. Then, start the motor 21 to drive one of the lead screws 22 to rotate, and then drive the other lead screw 22 to rotate through the cooperation of the belt pulley 26 and the synchronous belt 27. While the lead screw 22 rotates, it will drive the sliders 2 at both ends to move in the same speed and in opposite directions. Also, since the middle slider 2 is fixed, the other sliders 2 can be driven to move simultaneously through the cooperation of the first connecting rod 18 and the second connecting rod 20, and keep the distance equal. After the adjustment is completed, place a plurality of terminals inside the terminal card slots 9 of the bottom slider 2 respectively, then place the wire harness inside the wire harness groove 7, and make the contact position between the end of the wire harness and the terminal meet the welding requirements. Then, control the top slider 2 to descend. When the top slider 2 descends to the position where the first inclined block 11 cooperates with the second inclined block 14, the slider 2 continues to descend. At this time, the first inclined block 11 will cooperate with the second inclined block 14 to make the clamping plate 15 move inward to clamp the wire harness. After the clamping is stable, the slider 2 continues to descend, and the elastic strut 10 contracts until it reaches the welding station for welding. After the welding is completed, the slider 2 resets, and the welded wire harness and terminal can be taken out.

[0060] Embodiment 2:

[0061] A wire harness terminal welding device, which includes the wire harness terminal welding assembly in Embodiment 1. As Figures 7-8 shown, it includes a base 30 and a gantry 28 fixed to the top of the base 30 by bolts. The top of the base 30 is connected to the bottom of one of the variable pitch modules 1 through a second bracket 31. The lower surface of the top of the gantry 28 is provided with a lifting assembly 29, and the moving end of the lifting assembly 29 is connected to the top of the other variable pitch module 1 through another second bracket 31.

[0062] The lifting assembly 29 includes a lifting plate 34, a first movable pulley 36 and a second movable pulley 38. The first movable pulley 36 and the second movable pulley 38 are respectively rotatably connected to the bottom of the lifting plate 34 through a first wheel frame 35 and a second wheel frame 40. And the lifting plate 34 is slidably connected to the inner wall of the gantry 28 through a second guide rod 33 welded to its top. And the outer wall of the top of the gantry 28 is fixed with a telescopic device 32 by bolts, and the telescopic end of the telescopic device 32 is fixed to the outer wall of the top of the lifting plate 34 by bolts.

[0063] The lifting assembly 29 further includes a first cable 37 and a second cable 39. One ends of the first cable 37 and the second cable 39 are respectively fixed to the outer walls on both sides of the second bracket 31 at the top. The other end of the first cable 37 is wound around the top of the first movable pulley 36 and then fixed to the outer wall of the top of the base 30. The other end of the second cable 39 is wound around the bottom of the second movable pulley 38 and then fixed to the lower surface of the top of the gantry 28.

[0064] And the second bracket 31 at the top is connected to the outer wall of the bottom of the lifting plate 34 through a telescopic guide rod.

[0065] When this embodiment is in use, controlling the telescopic device 32 to expand and contract can drive the lifting of the lifting plate 34. When the lifting plate 34 descends, the second bracket 31 is driven to descend through the cooperation of the second movable pulley 38 and the second cable 39. When the lifting plate 34 ascends, the second bracket 31 is driven to ascend through the cooperation of the first movable pulley 36 and the first cable 37.

[0066] In this device, the lifting of the second bracket 31 is driven by using the lifting assembly 29. The lifting assembly 29 in turn realizes the driving of the second bracket 31 through the cooperation of the first movable pulley 36 and the first cable 37, and the cooperation of the second movable pulley 38 and the second cable 39. As a result, the lifting speed of the second bracket 31 is twice that of the lifting speed of the lifting plate 34. Thus, when the speed of the telescopic device 32 is constant, the moving speed of the second bracket 31 can be faster, and thus the welding efficiency is higher.

[0067] Embodiment 3:

[0068] A wire harness terminal welding device. This embodiment makes the following improvements on the basis of Embodiments 1 and 2: The first movable pulley 36 is rotatably connected to the first wheel frame 35 through a connecting shaft 41. The second movable pulley 38 is rotatably connected to the second wheel frame 40 through another connecting shaft 41. And one ends of the two connecting shafts 41 are provided with an overspeed limiting assembly 42, and the other ends of the two connecting shafts 41 are provided with an overspeed limiting assembly 42.

[0069] The overspeed limit component 42 includes a clamping wheel 48 fixed to the outer wall of the connecting shaft 41 and a fixing ring 47 fixed to the outer walls of the first wheel carrier 35 and the second wheel carrier 40. A friction ring 46 is fixed to the inner side wall of the fixing ring 47. A friction block 45 that can cooperate with the friction ring 46 is radially slidably connected to the clamping wheel 48, and the end face of the friction block 45 is connected to the outer wall of the connecting shaft 41 through a tension spring 44.

[0070] When the device is operating at normal speed, the friction block 45 does not contact the friction ring 46 under the action of the tension of the tension spring 44. When the device runs at overspeed, the rotation speed of the clamping wheel 48 increases, and the rotation speed of the friction block 45 also increases, and the centrifugal force received increases, so as to overcome the tension of the tension spring 44 and move outward, so as to realize deceleration by using the contact between the friction block 45 and the friction ring 46.

[0071] In this device, by setting the overspeed limit component 42 and utilizing the characteristic that the rotation speed of the connecting shaft 41 increases during overspeed, it can not only ensure unobstructed operation at normal speed, but also achieve negative feedback inhibition at high speed, thereby preventing damage caused by high-speed collisions.

[0072] To solve the locking problem, as Figure 11 shown, the locking component 43 includes a clamping plate 54 fixed to the end face of the connecting shaft 41 and a moving block 52. Key-shaped protrusions 56 are welded to the outer walls of the first wheel carrier 35 and the second wheel carrier 40. The moving block 52 is in clearance fit with the outer wall of the key-shaped protrusion 56. A circular array of locking components 43 is provided on the inner wall of the clamping plate 54, and a mating groove 53 that is snap-fitted with the mating groove 53 is fixed to the side wall of the moving block 52.

[0073] An electromagnet two 51 is fixed to the end face of the moving block 52 through a bolt. An electromagnet one 50 is provided on one side of the electromagnet two 51. The electromagnet one 50 is fixed to the first wheel carrier 35 and the second wheel carrier 40, and a return spring 49 is buckled on the outer side walls of both the first wheel carrier 35 and the second wheel carrier 40. The other end of the return spring 49 is buckled on the side wall of the moving block 52.

[0074] The electromagnet one 50 and the electromagnet two 51 are connected in series to the power supply circuit of the telescopic device 32.

[0075] When the telescopic device 32 is started for lifting and lowering operations, the electromagnet one 50 and the electromagnet two 51 are also powered on, thereby generating a mutually attracting magnetic field, pulling the moving block 52 to move, so that the clamping rod 55 is pulled out from the inner wall of the mating groove 53, and the connecting shaft 41 contacts and locks with the first wheel carrier 35 and the second wheel carrier 40, and the device can be lifted and lowered normally. When the telescopic device 32 is powered off, the electromagnet one 50 and the electromagnet two 51 are powered off, and the moving block 52 moves under the action of the elastic force of the return spring 49, so that the clamping rod 55 is inserted into the mating groove 53, thereby realizing the locking of the connecting shaft 41 with the first wheel carrier 35 and the second wheel carrier 40.

[0076] In this device, by providing the clamping rod 55 and the mating groove 53, the device can be locked in the lifting state when the telescopic device 32 is not working, thereby preventing sliding due to gravity and increasing the stability of the device. In addition, the moving block 52 is driven by the electromagnet I 50 and the electromagnet II 51, and the electromagnet I 50 and the electromagnet II 51 are connected in series to the power supply circuit of the telescopic device 32, so as to realize the automatic control of the locking, contact and starting state of the telescopic device 32.

[0077] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A wire harness terminal welding assembly, comprising two sets of variable pitch modules (1), characterized in that a plurality of sliders (2) are drivingly connected to the inner side of each set of variable pitch modules (1). The variable pitch module (1) includes a first bracket (4) and a transmission assembly (3) arranged on the outer side of the first bracket (4), and a set of adjustment linkage assemblies (5) are arranged on the side walls of the two sets of variable pitch modules (1); a welding head (6) is fixed to the bottom outer wall of the slider (2) at the top, and a terminal card slot (9) for limiting the terminal and a wire harness slot (7) for limiting the wire harness are respectively formed above the slider (2) at the bottom, and clamping assemblies (8) are arranged on both sides of the wire harness slot (7).

2. The wire harness terminal welding assembly according to claim 1, wherein The transmission assembly (3) includes a first slide rod (16) fixed inside the first bracket (4) and slidably fitted to the inner wall of the slider (2), two first connecting rods (18) and a plurality of second connecting rods (20). A convex column (17) is welded to the side wall of the slider (2). The two sliders (2) at the ends are rotatably connected to one end of the first connecting rod (18) through the convex column (17) welded to their tops. The remaining sliders (2) are rotatably connected to the middle of the second connecting rod (20) through the convex column (17) welded to their tops. The plurality of second connecting rods (20) are rotatably connected end to end through a hinge rod (19), and the other end of the first connecting rod (18) is rotatably connected to the ends of the two second connecting rods (20) at the ends.

3. The wire harness terminal welding assembly according to claim 2, characterized in that, The transmission assembly (3) further includes a first slide rod (16), a motor (21) and a lead screw (22). The first slide rod (16) is fixed to the inner side of the first bracket (4), and the lead screw (22) is rotatably connected to the inner side of the first bracket (4). The motor (21) is fixed to the outer side wall of the first bracket (4) by bolts, and the telescopic end of the motor (21) is connected to the end of the lead screw (22) through a coupling.

4. The wire harness terminal welding assembly according to claim 3, wherein One of the middle sliders (2) is fixed to the outer wall of the first slide rod (16), and the remaining sliders (2) are slidably connected to the outer wall of the first slide rod (16); The two sliders (2) at both ends are respectively connected to both sides of the lead screw (22) through threads with opposite helix directions.

5. A wire harness terminal welding assembly according to claim 2, wherein The clamping assembly (8) includes a clamping plate (15) slidably connected to one set of sliders (2) through a first guide rod (13) and an inclined plane block two (14) fixed to the side wall of the clamping plate (15). A first spring (12) is buckled inside the end of the first guide rod (13), and the other end of the first spring (12) is buckled to the side wall of this set of sliders (2). The bottom of the other set of sliders (2) is connected to an inclined plane block one (11) through an elastic strut (10), and the inclined plane block one (11) is located directly above the inclined plane block two (14).

6. The wire harness terminal welding assembly according to claim 1, characterized in that The adjustment linkage assembly (5) includes a plurality of pulleys (26) and a synchronous belt (27) drivingly engaged with the outer walls of the plurality of pulleys (26).

7. A wire harness terminal welding assembly according to claim 6, characterized in that, At each end of each bracket one (4), there are two opposed support blocks (23) slidably connected through a second slide bar (25). A second spring (24) is buckled on the opposite side of the support block (23) and the bracket one (4). Among them, a plurality of the belt pulleys (26) are respectively fixed on the outer wall of the lead screw (22) and rotatably connected to the side wall of the support block (23).

8. A wire harness terminal welding device, which comprises the wire harness terminal welding assembly according to any one of claims 1-7, characterized in that, It includes a base (30) and a gantry (28) bolted to the top of the base (30). The top of the base (30) is connected to the bottom of one of the variable pitch modules (1) through a bracket two (31). A lifting assembly (29) is arranged on the lower surface of the top of the gantry (28), and the moving end of the lifting assembly (29) is connected to the top of another variable pitch module (1) through another bracket two (31).

9. The wire harness terminal welding device according to claim 8, wherein, The lifting assembly (29) includes a lifting plate (34), a first movable pulley (36) and a second movable pulley (38). The first movable pulley (36) and the second movable pulley (38) are respectively rotatably connected to the bottom of the lifting plate (34) through a first wheel frame (35) and a second wheel frame (40). The lifting plate (34) is slidably connected to the inner wall of the gantry (28) through a second guide rod (33) welded to its top. A telescopic device (32) is bolted to the outer wall of the top of the gantry (28), and the telescopic end of the telescopic device (32) is bolted to the outer wall of the top of the lifting plate (34). The lifting assembly (29) further includes a first cable (37) and a second cable (39). One ends of the first cable (37) and the second cable (39) are respectively fixed to the outer walls on both sides of the top bracket two (31). The other end of the first cable (37) is wound around the top of the first movable pulley (36) and then fixed to the outer wall of the top of the base (30). The other end of the second cable (39) is wound around the bottom of the second movable pulley (38) and then fixed to the lower surface of the top of the gantry (28).

10. A wire harness terminal welding device according to claim 9, characterized in that, The first movable pulley (36) is rotatably connected to the first wheel frame (35) through a connecting shaft (41). The second movable pulley (38) is rotatably connected to the second wheel frame (40) through another connecting shaft (41). One ends of the two connecting shafts (41) are provided with an overspeed limiting assembly (42), and the other ends of the two connecting shafts (41) are provided with an overspeed limiting assembly (42). The overspeed limiting assembly (42) includes a catch wheel (48) fixed to the outer wall of the connecting shaft (41) and a fixed ring (47) fixed to the outer walls of the first wheel frame (35) and the second wheel frame (40). A friction ring (46) is fixed to the inner side wall of the fixed ring (47). A friction block (45) that can cooperate with the friction ring (46) is slidably connected in the radial direction of the catch wheel (48). The end face of the friction block (45) is connected to the outer wall of the connecting shaft (41) through a tension spring (44). The locking assembly (43) includes a clamping plate (54) fixed to the end face of the connecting shaft (41) and a moving block (52). Key-shaped protrusions (56) are welded to the outer walls of the first wheel carrier (35) and the second wheel carrier (40). The moving block (52) is in clearance fit with the outer wall of the key-shaped protrusion (56). Circularly-arrayed locking assemblies (43) are provided on the inner wall of the clamping plate (54). A mating groove (53) that is snap-fitted with the mating groove (53) is fixed to the side wall of the moving block (52); An electromagnet two (51) is fixed to the end face of the moving block (52) by bolts. An electromagnet one (50) is provided on one side of the electromagnet two (51). The electromagnet one (50) is fixed to the first wheel carrier (35) and the second wheel carrier (40). A return spring (49) is snap-fitted to the outer walls on one side of the first wheel carrier (35) and the second wheel carrier (40). The other end of the return spring (49) is snap-fitted to the side wall of the moving block (52); The electromagnet one (50) and the electromagnet two (51) are connected in series in the power supply circuit of the telescoper (32).

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