Electric vehicle switch contact laser welding device

Abstract

The electric vehicle switch contact laser welding device comprises a base and a top frame, a material fixing mechanism is arranged on one side of the top end of the base, a first longitudinal frame is fixedly installed on the side, close to the material fixing mechanism, of the bottom end of the top frame, and a welding mechanism is fixedly installed at the bottom end of the first longitudinal frame; a conveying device is arranged on the side, close to the welding mechanism, of the top end of the base, and a second longitudinal frame is fixedly installed on the side, away from the first longitudinal frame, of the bottom end of the top frame. The waterproof and chemical corrosion resistant performance of the electric vehicle switch contact platform and the electric wire welding position is improved, the damage to the electric vehicle switch contact platform and the electric wire welding position is reduced, and the subsequent use effect of the whole electric vehicle switch is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electric vehicle processing, in particular to a laser welding device for electric vehicle switch contacts. BACKGROUND

[0002] The electric vehicle switch contact is a core conductive component responsible for realizing circuit on-off in an electric vehicle switch assembly and is an "execution terminal" of the switch function; the electric vehicle switch contact is mainly a contact piece or a contact head made of high-conductivity materials (such as copper, silver alloy, gold-plated materials and the like), realizes contact or separation with a corresponding conductive component through mechanical operation (such as pressing, rotating, poking) of the switch, thereby controlling conduction and disconnection of the electric vehicle circuit, and finally determines the working state of components such as a vehicle lamp, a horn, a motor power supply and a steering lamp. The electric vehicle switch contact is firmly welded together with related components in the form of tin soldering to form a welded joint. In tin soldering processing of the electric vehicle switch contact, single-station operation is mostly used, manual positioning is required, the welding point position is difficult to accurately control, and the efficiency is relatively low. In addition, tin soldering fixation is prone to cause oxidation and fall-off, thereby affecting normal use of the electric vehicle switch contact. Therefore, the application provides a laser welding device for electric vehicle switch contacts to solve the above problems. SUMMARY

[0003] The application aims to provide a laser welding device for electric vehicle switch contacts to solve the problems in the background art.

[0004] To achieve the above-mentioned purpose, the application provides the following technical scheme: a laser welding device for electric vehicle switch contacts, comprising a base and a top frame, a material positioning mechanism is arranged on one side of the top end of the base, a first vertical frame is fixedly installed on one side of the bottom end of the top frame close to the material positioning mechanism, a welding mechanism is fixedly installed on the bottom end of the first vertical frame, a conveying device is arranged on one side of the top end of the base close to the welding mechanism, a second vertical frame is fixedly installed on one side of the bottom end of the top frame away from the first vertical frame, a material feeding mechanism is fixedly installed on the bottom end of the second vertical frame, and auxiliary support platforms are arranged on both sides of one end of the conveying device close to the welding mechanism.

[0005] Preferably, the material positioning mechanism comprises a first linear electric rail, the first linear electric rail is fixedly installed on one side of the top end of the base, a connecting cross frame is fixedly installed on the driving end of the first linear electric rail, and positioning members are fixedly installed on both ends of the connecting cross frame.

[0006] Preferably, the positioning part comprises a positioning base frame fixedly installed at the end of the connecting cross frame, a positioning sliding groove is formed at each corner of the positioning base frame, a positioning vertical rod is slidably clamped in the positioning sliding groove, a plurality of the positioning vertical rods movably clamp the electric vehicle switch contact platform to be welded therebetween, two limiting clamps are fixedly sleeved at the middle part of the positioning vertical rod, the two limiting clamps are in contact with the upper and lower surfaces of the positioning base frame respectively, a first bidirectional telescopic rod is arranged at the bottom of each side of the positioning base frame, a mounting seat is fixedly installed on the outer side of the first bidirectional telescopic rod, the mounting seat is fixedly installed at the bottom of the positioning base frame, a driving sliding frame is fixedly installed at the two driving ends of the first bidirectional telescopic rod, and the bottom of the two positioning vertical rods on the same side is movably clamped in the corresponding driving sliding frame.

[0007] Preferably, the welding mechanism comprises a mechanism vertical frame fixedly installed at the bottom end of the first vertical frame, a lifting cylinder fixedly installed in the mechanism vertical frame, a distance adjusting outer frame provided at the bottom end of the lifting cylinder, a first toothed plate slidably clamped at the top of the distance adjusting outer frame, a second toothed plate slidably clamped at the bottom of the distance adjusting outer frame, a first mounting frame fixedly installed at the outer end of the first toothed plate, a second mounting frame fixedly installed at the outer end of the second toothed plate, a welding part fixedly installed on the first mounting frame, and an auxiliary covering frame fixedly installed on the second mounting frame.

[0008] Preferably, the welding part comprises a protective outer cylinder, an exhaust head integrally formed at the bottom end of the protective outer cylinder, the protective outer cylinder fixedly installed on the first mounting frame, a sealing ring fixedly installed at the top end of the protective outer cylinder, a laser welding head fixedly installed at the middle part of the sealing ring, a first head integrally formed at the top of the protective outer cylinder, a first hose fixedly installed at the end of the first head, a first pipe fixedly installed at the end of the first hose, a first seat fixedly installed at the outer side of the first pipe, and the first seat fixedly installed at the outer side of the mechanism vertical frame.

[0009] Preferably, a second head is integrally formed at the top of the auxiliary covering frame, a second hose is fixedly installed at the end of the second head, a second pipe is fixedly installed at the end of the second hose, a second seat is fixedly installed at the outer side of the second pipe, and the second seat is fixedly installed at the outer side of the mechanism vertical frame.

[0010] Preferably, a driving gear is engagedly connected between the first toothed plate and the second toothed plate, a driving horizontal shaft is fixedly installed at the middle part of the driving gear, and the driving horizontal shaft is rotatably installed on the distance adjusting outer frame.

[0011] Preferably, the outer end of the driving cross shaft is fixedly installed with a worm gear, the outer side of the worm gear is engaged with a worm, the worm is rotatably installed on the outer wall of the distance adjusting outer frame, the side of the distance adjusting outer frame close to the worm is fixedly installed with a first motor, and the driving end of the first motor and the shaft end of the worm are fixedly installed.

[0012] Preferably, the feeding mechanism comprises a second linear motor rail, the second linear motor rail is fixedly installed at the bottom end of the second vertical frame, the driving end of the second linear motor rail is fixedly installed with a connecting bracket, the end of the connecting bracket is fixedly installed with a guide cross rod, the both ends of the guide cross rod are slidably installed with a translation slide, the bottom end of the translation slide is fixedly installed with a clamping piece, the end of the connecting bracket is fixedly installed with a second double-acting telescopic rod, and the both driving ends of the second double-acting telescopic rod are fixedly installed with the translation slide.

[0013] Preferably, the clamping piece comprises two clamping side frames symmetrically distributed, one of the clamping side frames is fixedly installed at the bottom end of the corresponding translation slide, the top of the two clamping side frames is fixedly installed with a guide slide rod, the outer side of the guide slide rod is slidably clamped with two clamping frames symmetrically distributed, the middle of the two clamping side frames is fixedly installed with a connecting seat, the bottom of the connecting seat is fixedly installed with a third double-acting telescopic rod, and the both driving ends of the third double-acting telescopic rod are fixedly installed with the clamping frame.

[0014] Compared with the prior art, the beneficial effects of the present application are that: 1. The material positioning mechanism is arranged to position and transmit the electric vehicle switch contact platform, the welding mechanism is arranged to laser weld and glue seal the welding position, the waterproof and chemical corrosion resistance of the electric vehicle switch contact platform and the electric wire welding position is improved, the damage of the electric vehicle switch contact platform and the electric wire welding position is reduced, and the use effect of the entire electric vehicle switch is improved.

[0015] 2. The welding mechanism is arranged to form a protection area at the laser welding position of the electric vehicle switch contact platform, so as to prevent the welding seam from oxidizing too fast and affecting the welding effect of the laser welding position of the electric vehicle switch contact platform.

[0016] 3. The welding mechanism can flexibly adjust the distance between the welding part and the auxiliary cover frame, adapt to the subsequent welding processing of different distance contacts, and improve the use flexibility of the entire device.

[0017] 4. The feeding mechanism is arranged to clamp and position the two ends of the electric wire and transmit them above the two switch contact welding positions on the electric vehicle switch contact platform, so as to stably laser weld the two ends of the electric wire and the two switch contact welding positions on the electric vehicle switch contact platform. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 Structure schematic diagram of the present application.

[0020] Figure 2 Structure schematic diagram of the material positioning mechanism in the present application.

[0021] Figure 3 Structure schematic diagram of the positioning member in the present application.

[0022] Figure 4 Structure schematic diagram of the welding mechanism in the present application.

[0023] Figure 5 Structure schematic diagram of the welding mechanism in the present application.

[0024] Figure 6 Structure schematic diagram of the welding mechanism in the present application.

[0025] Figure 7 Structure schematic diagram of the present application Figure 6 Enlarged view of A in the present application.

[0026] Figure 8 Structure schematic diagram of the welding member in the present application.

[0027] Figure 9 Structure schematic diagram of the auxiliary cover frame in the present application.

[0028] Figure 10 Structure schematic diagram of the feeding mechanism in the present application.

[0029] Figure 11 Structure schematic diagram of the present application Figure 10 Enlarged view of B in the present application.

[0030] Figure 12 Structure schematic diagram of the clamping member in the present application.

[0031] In the diagram: 1. Base; 2. Top frame; 21. First longitudinal frame; 22. Second longitudinal frame; 3. Material positioning mechanism; 4. Welding mechanism; 5. Conveying equipment; 6. Feeding mechanism; 7. Auxiliary support platform; 31. First linear electric rail; 32. Connecting cross frame; 33. Positioning component; 331. Positioning bottom frame; 332. Positioning slide groove; 333. Positioning longitudinal rod; 334. Limiting clasp; 335. First bidirectional telescopic rod; 336. Mounting seat; 337. Drive slide frame; 41. Mechanism longitudinal frame; 42. Lifting cylinder; 43. Adjustable outer frame; 431. First toothed plate; 4311. First mounting frame; 432. Second toothed plate; 4321. Second mounting frame; 433. Drive gear; 4331. Drive horizontal shaft; 434. Worm gear; 435. Worm; 436. 44. First motor; 44. Welded component; 441. Protective outer cylinder; 4411. Exhaust head; 442. Sealing ring; 443. Laser welding head; 444. First head; 45. Auxiliary frame; 451. Second head; 46. Protective outer frame; 461. Rotary cylinder; 4611. Drive longitudinal shaft; 462. Protective top cover; 47. First hose; 471. First pipe; 472. First seat; 48. Second hose; 481. Second pipe; 482. Second seat; 61. Second linear electric rail; 62. Connecting bracket; 63. Guide crossbar; 631. Second bidirectional telescopic rod; 64. Translation slide; 65. Clamping component; 651. Clamping side frame; 652. Guide slide bar; 653. Clamping frame; 654. Connecting seat; 655. Third bidirectional telescopic rod. Detailed Implementation

[0032] 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.

[0033] Example: Figures 1-12 As shown, the present invention provides a laser welding device for electric vehicle switch contacts, including a base 1 and a top frame 2. A material fixing mechanism 3 is provided on one side of the top of the base 1. A first longitudinal frame 21 is fixedly installed on the bottom of the top frame 2 near the material fixing mechanism 3. A welding mechanism 4 is fixedly installed on the bottom of the first longitudinal frame 21. A transmission device 5 is provided on the top of the base 1 near the welding mechanism 4. The transmission device 5 automatically transmits multiple electrical wires one by one to the position of the welding mechanism 4. A second longitudinal frame 22 is fixedly installed on the bottom of the top frame 2 away from the first longitudinal frame 21. A feeding mechanism 6 is fixedly installed on the bottom of the second longitudinal frame 22. Auxiliary support platforms 7 are provided on both sides of the end of the transmission device 5 near the welding mechanism 4. The auxiliary support platforms 7 are fixedly installed on the top of the base 1.

[0034] The material positioning mechanism 3 comprises a first linear motor 31 fixedly installed on the top end side of the base 1, a connecting cross frame 32 fixedly installed at the driving end of the first linear motor 31, and a positioning piece 33 fixedly installed at both ends of the connecting cross frame 32. By starting the first linear motor 31 to drive the connecting cross frame 32 to slide the two positioning pieces 33, one of the positioning pieces 33 is moved below the welding mechanism 4, and the other is moved to the side of the welding mechanism 4, so as to facilitate the discharging of the welded electric vehicle switch contact platform and the immediate feeding of the new electric vehicle switch contact platform, thereby improving the welding efficiency of the electric vehicle switch contact of the whole welding device. The positioning piece 33 comprises a positioning bottom frame 331 fixedly installed at the end of the connecting cross frame 32, a positioning sliding groove 332 formed at each corner of the positioning bottom frame 331, and a positioning vertical rod 333 slidably clamped in the positioning sliding groove 332. A plurality of positioning vertical rods 333 are movably clamped between the electric vehicle switch contact platforms to be welded, and the electric vehicle switch contact platforms are positioned. The middle part of the positioning vertical rod 333 is fixedly sleeved with two limiting clamping rings 334, and the two limiting clamping rings 334 respectively contact the upper and lower surfaces of the positioning bottom frame 331. The first bidirectional telescopic rod 335 is provided at the bottom end of the positioning bottom frame 331, and the mounting seat 336 is fixedly installed on the outside of the first bidirectional telescopic rod 335. The mounting seat 336 is fixedly installed at the bottom end of the positioning bottom frame 331, and the driving sliding frame 337 is fixedly installed at the two driving ends of the first bidirectional telescopic rod 335. The bottom part of the two positioning vertical rods 333 on the same side is movably clamped in the corresponding driving sliding frame 337. By starting the first bidirectional telescopic rod 335 to drive the two driving sliding frames 337 to slide towards each other, the positioning vertical rods 333 are slid in the corresponding driving sliding frames 337, and the plurality of positioning vertical rods 333 are controlled to slide towards each other in the corresponding positioning sliding grooves 332, so as to position the electric vehicle switch contact platform and facilitate the stable welding of the electric vehicle switch contact platform. Conversely, by starting the first bidirectional telescopic rod 335 to drive the two driving sliding frames 337 to slide away from each other, the positioning vertical rods 333 are slid in the corresponding driving sliding frames 337, and the plurality of positioning vertical rods 333 are controlled to slide away from each other in the corresponding positioning sliding grooves 332, so that the electric vehicle switch contact platform loses the positioning.

[0035] The welding mechanism 4 comprises a mechanism longitudinal frame 41 fixedly installed at the bottom end of the first longitudinal frame 21, a lifting cylinder 42 fixedly installed in the mechanism longitudinal frame 41, a distance-adjusting outer frame 43 provided at the bottom end of the lifting cylinder 42, a first toothed plate 431 slidingly clamped at the top of the distance-adjusting outer frame 43, a second toothed plate 432 slidingly clamped at the bottom of the distance-adjusting outer frame 43, a first mounting frame 4311 fixedly installed at the outer end of the first toothed plate 431, a second mounting frame 4321 fixedly installed at the outer end of the second toothed plate 432, a welding piece 44 fixedly installed on the first mounting frame 4311, and an auxiliary covering frame 45 fixedly installed on the second mounting frame 4321, wherein the welding piece 44 and the auxiliary covering frame 45 are controlled to lift by opening the lifting cylinder 42. The distance-adjusting outer frame 43 is provided with a protective outer frame 46, a rotating cylinder 461 fixedly installed in the protective outer frame 46, a driving longitudinal shaft 4611 fixedly installed at the driving end of the rotating cylinder 461, the driving longitudinal shaft 4611 corresponding in position to the center positions of the two contact points on the switch contact platform of the electric vehicle, the driving longitudinal shaft 4611 fixedly installed at the top middle part of the distance-adjusting outer frame 43, a protective top cover 462 fixedly installed at the top end of the protective outer frame 46, and the driving end of the lifting cylinder 42 fixedly installed at the top end of the protective top cover 462, wherein the welding piece 44 and the auxiliary covering frame 45 are controlled to rotate by opening the rotating cylinder 461, and the positions of the welding piece 44 and the auxiliary covering frame 45 are exchanged.

[0036] The welding piece 44 comprises a protective outer cylinder 441 fixedly installed on the first mounting frame 4311, an exhaust head 4411 integrally formed at the bottom end of the protective outer cylinder 441, an enclosing ring 442 fixedly installed at the top end of the protective outer cylinder 441, a laser welding head 443 fixedly installed at the middle part of the enclosing ring 442, a first head 444 integrally formed at the top of the protective outer cylinder 441, a first hose 47 fixedly installed at the end of the first head 444, a first pipe 471 fixedly installed at the end of the first hose 47, a first seat 472 fixedly installed at the outer side of the first pipe 471, and the first seat 472 fixedly installed at the outer side of the mechanism longitudinal frame 41, wherein the end of the first pipe 471 is connected with the output port of a protective gas output system, the laser welding head 443 is used to perform laser welding processing on the laser welding position of the switch contact platform and the electric wire of the electric vehicle, and the protective gas output system is simultaneously opened, the protective gas is introduced into the protective outer cylinder 441 through the first pipe 471, the first hose 47 and the first head 444, and is uniformly exhausted through the bottom exhaust head 4411, so as to be arranged at the laser welding position of the switch contact platform of the electric vehicle and form a protective area at the laser welding position of the switch contact platform of the electric vehicle, thereby preventing the weld from being oxidized too fast and affecting the welding effect of the laser welding position of the switch contact platform of the electric vehicle.

[0037] The top of the auxiliary cover frame 45 is integrally formed with a second head 451, the end of the second head 451 is fixedly installed with a second hose 48, the end of the second hose 48 is fixedly installed with a second pipe 481, the outer side of the second pipe 481 is fixedly installed with a second seat 482, the second seat 482 is fixedly installed on the outer side of the mechanism vertical frame 41, in use, the end of the second pipe 481 is connected with the output port of the epoxy resin glue output system, after the automatic laser welding of the electric vehicle switch contact platform and the electric wire is completed, the auxiliary cover frame 45 is moved to the upper side of the welding position, the epoxy resin glue output system is turned on, the epoxy resin glue is introduced into the auxiliary cover frame 45 through the second pipe 481, the second hose 48 and the second head 451, and is discharged through the bottom end of the auxiliary cover frame 45, the epoxy resin glue is protected at the welding position of the electric vehicle switch contact platform and the electric wire, the waterproof and chemical corrosion resistance of the welding position of the electric vehicle switch contact platform and the electric wire are improved, the damage of the welding position of the electric vehicle switch contact platform and the electric wire is reduced, and the use effect of the entire electric vehicle switch is improved.

[0038] The first tooth plate 431 and the second tooth plate 432 are meshed and connected with a driving gear 433, the driving gear 433 and the middle part are fixedly installed with a driving horizontal shaft 4331, the driving horizontal shaft 4331 is rotatably installed on the distance adjusting outer frame 43; the outer end of the driving horizontal shaft 4331 is fixedly installed with a worm wheel 434, the outer side of the worm wheel 434 is meshed and connected with a worm 435, the worm 435 is rotatably installed on the outer wall of the distance adjusting outer frame 43, the side of the outer wall of the distance adjusting outer frame 43 close to the worm 435 is fixedly installed with a first motor 436, the driving end of the first motor 436 and the shaft end of the worm 435 are fixedly installed, by turning on the first motor 436, the worm 435 drives the worm wheel 434 and the driving horizontal shaft 4331 to rotate, so as to control the driving gear 433 to rotate, and then drive the first tooth plate 431 and the second tooth plate 432 to move away from each other, on the contrary, by turning on the first motor 436, the worm 435 drives the worm wheel 434 and the driving horizontal shaft 4331 to reversely rotate, so as to control the driving gear 433 to reversely rotate, and then drive the first tooth plate 431 and the second tooth plate 432 to move towards each other, so as to flexibly adjust the distance between the welding part 44 and the auxiliary cover frame 45, adapt to the subsequent welding processing of different distance contacts, and improve the use flexibility of the entire device.

[0039] The feeding mechanism 6 comprises a second linear motor 61 fixedly installed at the bottom end of the second vertical frame 22, a connecting bracket 62 fixedly installed at the driving end of the second linear motor 61, a guide cross bar 63 fixedly installed at the end of the connecting bracket 62, a translation slide 64 slidingly installed at both ends of the guide cross bar 63, a clamping piece 65 fixedly installed at the bottom end of the translation slide 64, and a second double-acting telescopic rod 631 fixedly installed at the end of the connecting bracket 62, with both driving ends of the second double-acting telescopic rod 631 fixedly installed at the translation slides 64. The second linear motor 61 is opened to drive the connecting bracket 62 to move the two clamping pieces 65 to slide, and the second double-acting telescopic rod 631 is opened to drive the two clamping pieces 65 to move towards or away from each other to adjust the distance between the two clamping pieces 65 to adapt to the clamping and positioning of the different distance end heads of the electric wire. The clamping piece 65 comprises two clamping side frames 651 symmetrically distributed, one of which is fixedly installed at the bottom end of the corresponding translation slide 64, and a guide slide rod 652 is fixedly installed at the top of the two clamping side frames 651. The guide slide rod 652 is slidingly clamped with two clamping frames 653 symmetrically distributed on the outer side, a connecting seat 654 is fixedly installed at the middle of the two clamping side frames 651, a third double-acting telescopic rod 655 is fixedly installed at the bottom of the connecting seat 654, and both driving ends of the third double-acting telescopic rod 655 are fixedly installed at the clamping frames 653. The two end heads of the electric wire are moved to between the two clamping frames 653 in the corresponding clamping piece 65, the third double-acting telescopic rod 655 is opened to drive the corresponding two clamping frames 653 to move towards each other to clamp and position the two end heads of the electric wire, and the two end heads of the electric wire are moved above the two switch contact welding positions on the electric vehicle switch contact platform for subsequent stable laser welding of the two end heads of the electric wire and the two switch contact welding positions on the electric vehicle switch contact platform.

[0040] Working principle: connect the end of the first pipe 471 with the output port of the protective gas output system, and connect the end of the second pipe 481 with the output port of the epoxy resin glue output system. Place the electric vehicle switch contact platform to be welded between the plurality of positioning vertical rods 333, open the first double-acting telescopic rod 335 to drive the two side driving slide frames 337 to slide towards each other, and cooperate with the positioning vertical rods 333 to slide in the corresponding driving slide frames 337 to control the plurality of positioning vertical rods 333 to slide towards each other in the corresponding positioning slide grooves 332 to position the electric vehicle switch contact platform. Subsequently, the first linear motor 31 is opened to drive the connecting cross frame 32 to move the two positioning pieces 33 to slide to move the electric vehicle switch contact platform below the welding mechanism 4, and the other positioning piece 33 is moved to one side of the welding mechanism 4 to facilitate the immediate feeding and positioning of the new electric vehicle switch contact platform on the other positioning piece 33 for subsequent laser welding of the new electric vehicle switch contact platform. The transmission device 5 is used to automatically transmit the plurality of electrical wires one by one to the position of the welding mechanism 4. By opening the second linear motor rail 61, the connecting bracket 62 drives the two clamping pieces 65 to slide upwards to the end of the transmission device 5, and by opening the second double telescopic rod 631, the two clamping pieces 65 are driven to move towards or away from each other, adjusting the distance between the two clamping pieces 65 to adapt to the clamping and positioning of the electrical wires with different interval ends, so that the two ends of the electrical wires are moved to the two clamping frames 653 between the corresponding clamping pieces 65, and the third double telescopic rod 655 is opened to drive the two corresponding clamping frames 653 to move towards each other to clamp and position the two ends of the electrical wires. Then, the second linear motor rail 61 is opened again to drive the connecting bracket 62 to move the two clamping pieces 65 and the two ends of the electrical wires to the upper position of the two switch contact welding positions on the electric vehicle switch contact platform. Then, the first motor 436 is opened to drive the worm 435 to drive the worm gear 434 and the driving horizontal shaft 4331 to rotate, thereby controlling the driving gear 433 to rotate, and then driving the first toothed plate 431 and the second toothed plate 432 to move away from each other. Conversely, the first motor 436 is opened to drive the worm 435 to drive the worm gear 434 and the driving horizontal shaft 4331 to rotate in the opposite direction, thereby controlling the driving gear 433 to rotate in the opposite direction, and then driving the first toothed plate 431 and the second toothed plate 432 to move towards each other. In this way, the distance between the welding piece 44 and the auxiliary cover frame 45 is flexibly adjusted to adapt to the subsequent welding processing of different interval contacts, until the welding piece 44 and the auxiliary cover frame 45 are adjusted to the position, so that the welding piece 44 and the auxiliary cover frame 45 are respectively and one-to-one corresponding to the two switch contact welding positions on the electric vehicle switch contact platform. Then, the lifting cylinder 42 is opened to control the welding piece 44 and the auxiliary cover frame 45 to descend, so that the laser welding head 443 descends to the appropriate height. The laser welding head 443 is used to laser weld the electric vehicle switch contact platform and the electrical wire laser welding position. The protective gas output system is opened at the same time. The protective gas is introduced into the protective outer cylinder 441 through the first pipe 471, the first hose 47 and the first head 444, and is uniformly discharged through the bottom exhaust head 4411. The protective gas is discharged at the electric vehicle switch contact platform laser welding position, forming a protective area at the electric vehicle switch contact platform laser welding position, preventing the weld from oxidizing too quickly and affecting the welding effect of the electric vehicle switch contact platform laser welding position. After the laser welding of one switch contact welding position is completed, the welding piece 44 and the auxiliary cover frame 45 are moved upward, then the rotary cylinder 461 is opened to control the welding piece 44 and the auxiliary cover frame 45 to rotate, the positions of the welding piece 44 and the auxiliary cover frame 45 are exchanged, the laser welding head 443 is moved to another switch contact welding position for laser welding, at the same time, the auxiliary cover frame 45 corresponds to the last switch contact welding position, then the epoxy resin glue output system is opened, the epoxy resin glue is introduced into the auxiliary cover frame 45 through the second pipe 481, the second hose 48 and the second head 451, and is discharged through the bottom end of the auxiliary cover frame 45, the epoxy resin glue is used for sealing and protecting the electric vehicle switch contact platform and the electric wire welding position, and the waterproof and chemical corrosion resistance of the electric vehicle switch contact platform and the electric wire welding position are improved; When the laser welding of another switch contact welding position is completed, the welding piece 44 and the auxiliary cover frame 45 are moved upward again and are reset in the reverse direction, and the auxiliary cover frame 45 is used for sealing and protecting another switch contact welding position; Until the welding and sealing protection of two switch contact welding positions are completed, the welding piece 44 and the auxiliary cover frame 45 are moved upward and reset, and the positioning of the electric wire is released; Then, the first straight linear rail 31 is opened again to drive the connection cross frame 32 to move the positioning piece 33 to the lower side of the welding mechanism 4 for subsequent welding processing, and the electric vehicle switch contact platform and the electric wire after welding are moved to the side of the welding mechanism 4, so that the electric vehicle switch contact platform after welding on the positioning piece 33 is discharged, and the auxiliary support platform 7 supports the electric wire after welding.

[0041] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An electric vehicle switch contact laser welding device, comprising a base (1) and a top frame (2), characterized in that: The top end side of the base (1) is provided with a material positioning mechanism (3), the bottom end of the top frame (2) is fixedly installed with a first vertical frame (21) on the side close to the material positioning mechanism (3), the bottom end of the first vertical frame (21) is fixedly installed with a welding mechanism (4), the top end of the base (1) is provided with a conveying device (5) on the side close to the welding mechanism (4), the bottom end of the top frame (2) is fixedly installed with a second vertical frame (22) on the side away from the first vertical frame (21), the bottom end of the second vertical frame (22) is fixedly installed with a feeding mechanism (6), and the conveying device (5) is provided with auxiliary supporting platforms (7) on the two sides of the end close to the welding mechanism (4). The auxiliary supporting platforms (7) are fixedly installed on the top end of the base (1).

2. A laser welding apparatus for electric vehicle switch contacts as defined in claim 1, wherein: The material positioning mechanism (3) comprises a first linear electric rail (31), the first linear electric rail (31) is fixedly installed on the top end side of the base (1), and the driving end of the first linear electric rail (31) is fixedly installed with a connecting cross frame (32). The two end portions of the connecting cross frame (32) are fixedly installed with positioning pieces (33).

3. A laser welding apparatus for electric vehicle switch contacts as defined in claim 2, wherein: The positioning piece (33) comprises a positioning bottom frame (331), the positioning bottom frame (331) is fixedly installed on the end portion of the connecting cross frame (32), positioning sliding grooves (332) are formed at the four corners of the positioning bottom frame (331), positioning vertical rods (333) are slidably clamped in the positioning sliding grooves (332), and an electric vehicle switch contact platform to be welded is movably clamped between the plurality of positioning vertical rods (333). Two limiting clamping rings (334) are fixedly sleeved on the middle portion of the positioning vertical rod (333), the limiting clamping rings (334) are respectively in contact with the upper and lower surfaces of the positioning bottom frame (331), first bidirectional telescopic rods (335) are arranged on the two sides of the bottom end of the positioning bottom frame (331), mounting seats (336) are fixedly installed on the outer sides of the first bidirectional telescopic rods (335), the mounting seats (336) are fixedly installed on the bottom end of the positioning bottom frame (331), drive sliding frames (337) are fixedly installed on the two driving ends of the first bidirectional telescopic rods (335), and the bottoms of the two positioning vertical rods (333) on the same side are movably clamped in the corresponding drive sliding frames (337).

4. The laser welding apparatus for electric vehicle switch contacts of claim 1, wherein: The welding mechanism (4) comprises a mechanism longitudinal frame (41) fixedly installed at the bottom end of the first longitudinal frame (21), a lifting cylinder (42) fixedly installed in the mechanism longitudinal frame (41), a distance adjusting outer frame (43) provided at the bottom end of the lifting cylinder (42), a first toothed plate (431) slidingly clamped at the top of the distance adjusting outer frame (43), a second toothed plate (432) slidingly clamped at the bottom of the distance adjusting outer frame (43), a first mounting frame (4311) fixedly installed at the outer end of the first toothed plate (431), a second mounting frame (4321) fixedly installed at the outer end of the second toothed plate (432), a welding piece (44) fixedly installed on the first mounting frame (4311), an auxiliary covering frame (45) fixedly installed on the second mounting frame (4321), a protective outer frame (46) provided at the top end of the distance adjusting outer frame (43), a rotating cylinder (461) fixedly installed in the protective outer frame (46), a driving longitudinal shaft (4611) fixedly installed at the driving end of the rotating cylinder (461), a protective top cover (462) fixedly installed at the top end of the protective outer frame (46), and the driving end of the lifting cylinder (42) is fixedly installed at the top end of the protective top cover (462).

5. A laser welding apparatus for electric vehicle switch contacts as defined in claim 4, wherein: The welding piece (44) comprises a protective outer cylinder (441), an exhaust head (4411) integrally formed at the bottom end of the protective outer cylinder (441), the protective outer cylinder (441) being fixedly installed on the first mounting frame (4311), a sealing ring (442) fixedly installed at the top end of the protective outer cylinder (441), a laser welding head (443) fixedly installed at the middle portion of the sealing ring (442), a first head (444) integrally formed at the top of the protective outer cylinder (441), a first hose (47) fixedly installed at the end of the first head (444), a first pipe (471) fixedly installed at the end of the first hose (47), a first seat (472) fixedly installed at the outer side of the first pipe (471), and the first seat (472) being fixedly installed at the outer side of the mechanism longitudinal frame (41).

6. A laser welding apparatus for electric vehicle switch contacts as defined in claim 4, wherein: The top of the auxiliary covering frame (45) is integrally formed with a second head (451), a second hose (48) is fixedly installed at the end of the second head (451), a second pipe (481) is fixedly installed at the end of the second hose (48), a second seat (482) is fixedly installed at the outer side of the second pipe (481), and the second seat (482) is fixedly installed at the outer side of the mechanism longitudinal frame (41).

7. The laser welding apparatus for electric vehicle switch contacts of claim 4, wherein: The first toothed plate (431) and the second toothed plate (432) are engagedly connected with a driving gear (433), the driving gear (433) is fixedly installed with a driving horizontal shaft (4331) at the middle portion, and the driving horizontal shaft (4331) is rotatably installed on the distance adjusting outer frame (43).

8. The laser welding apparatus for electric vehicle switch contacts of claim 7, wherein: The outer end of the driving horizontal shaft (4331) is fixedly installed with a worm gear (434), the outer side of the worm gear (434) is engaged with a worm (435), the worm (435) is rotatably installed on the outer wall of the distance adjusting outer frame (43), the side of the distance adjusting outer frame (43) close to the worm (435) is fixedly installed with a first motor (436), and the driving end of the first motor (436) and the shaft end of the worm (435) are fixedly installed.

9. The laser welding apparatus for electric vehicle switch contacts of claim 1, wherein: The feeding mechanism (6) comprises a second linear motor rail (61), the second linear motor rail (61) is fixedly installed at the bottom end of the second vertical frame (22), the driving end of the second linear motor rail (61) is fixedly installed with a connecting bracket (62), the end of the connecting bracket (62) is fixedly installed with a guide cross rod (63), both ends of the guide cross rod (63) are slidably installed with a translation slide (64), the bottom end of the translation slide (64) is fixedly installed with a clamping piece (65), the end of the connecting bracket (62) is fixedly installed with a second two-way telescopic rod (631), and both driving ends of the second two-way telescopic rod (631) are fixedly installed with the translation slide (64).

10. The laser welding apparatus for electric vehicle switch contacts of claim 9, wherein: The clamping piece (65) comprises two clamping side frames (651) symmetrically distributed, one of the clamping side frames (651) is fixedly installed at the bottom end of the corresponding translation slide (64), the top of the two clamping side frames (651) is fixedly installed with a guide slide rod (652), the outer side of the guide slide rod (652) is slidably clamped with two clamping frames (653) symmetrically distributed, the middle of the two clamping side frames (651) is fixedly installed with a connecting seat (654), the bottom of the connecting seat (654) is fixedly installed with a third two-way telescopic rod (655), and both driving ends of the third two-way telescopic rod (655) are fixedly installed with the clamping frame (653).

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