Terminal ultrasonic welding equipment based on electric automobile parts

Abstract

The invention relates to the technical field of electric vehicle welding, and discloses a welding device for welding electric vehicles, a lifting air cylinder is vertically installed in a welding platform and located below a positioning plate, a lifting rod is movably arranged in the lifting air cylinder upwards, and the end, stretching out of the welding platform upwards, of the lifting rod is connected with a detachable end cover. The upper end of the detachable end cover is connected with a female seat. A lifting cylinder is started, a lifting rod extends out, a mother seat linearly ascends along two groups of guide side plates until a son seat is attached to a positioning plate and a peeling part abuts against a welding head, then the lifting rod continuously extends out, the mother seat continuously ascends, and a plurality of groups of buffer springs between the mother seat and the son seat are extruded; active movement of the ultrasonic welding head is replaced with a passive welding mode, on one hand, the service life of the ultrasonic welding head and the amplitude-change pole is prolonged, the stability of the ultrasonic welding head during working is improved, and on the other hand, the contact acting force among the ultrasonic welding head, the amplitude-change pole and the buffer spring is automatically adjusted and buffered through the buffer spring.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicle welding, and particularly relates to a terminal ultrasonic welding device based on electric vehicle parts. Background Art

[0002] The new energy electric vehicle market in China has maintained strong growth. The sales volume is expected to reach 16.5 million (including exports) in 2025, with a growth rate of nearly 30%. The domestic penetration rate will exceed 55%. Since electric vehicles are powered by electricity, wiring terminals are required for in-vehicle batteries, vehicle-mounted sensors, motors, and multiple in-vehicle electrical devices. For example, alloy terminals have excellent electrical conductivity, strong mechanical properties, strong corrosion resistance, good processing performance and other technical characteristics; wiring terminals are formed by welding metal sheets and wires enclosed in insulating plastics. Therefore, a terminal ultrasonic welding device is needed during the processing.

[0003] There are many technical defects in the existing terminal ultrasonic welding devices during use. First, when welding, the ultrasonic welding head needs to be pressed down at high speed to press the metal sheet and the wire. On the one hand, the frequent reciprocating motion will reduce the service life of the ultrasonic welding head and the horn, increasing the maintenance cost. On the other hand, the movable design is likely to cause local structure loosening, which will reduce the stability of the ultrasonic welding head during operation, thereby reducing the welding quality. For example, the phenomenon of welding paste will occur, and the wire may also be broken; Second, there are oil stains, oxide layers and impurities on the surfaces of the metal sheet and the wire. Direct welding will reduce the bonding quality between the two. Currently, the existing terminal ultrasonic welding devices lack a mechanism capable of automatically cleaning the two, resulting in low automation of the devices.

[0004] In summary, considering that the existing facilities cannot meet the working requirements, for this reason, we propose a terminal ultrasonic welding device based on electric vehicle parts. Summary of the Invention

[0005] The main purpose of the present invention is to provide a terminal ultrasonic welding device based on electric vehicle parts, which can effectively solve the problems in the background art.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows: A terminal ultrasonic welding device based on electric vehicle parts includes a welding platform. A support frame is provided at the lower end of the welding platform. A bearing seat is provided at the rear position on the upper end of the welding platform. An ultrasonic welding machine body is installed on the upper end of the bearing seat. A control panel is provided on the front end face of the ultrasonic welding machine body. A horn is provided at the lower end of the ultrasonic welding machine body. An ultrasonic welding head is connected to the lower end of the horn. A positioning plate is horizontally provided on the front end face of the ultrasonic welding machine body near the horn.

[0007] As a preferred embodiment of the ultrasonic welding device for terminals based on electric vehicle parts according to the present invention, wherein: a lifting cylinder is vertically installed inside the welding platform and below the positioning plate. A lifting rod is movably arranged upward inside the lifting cylinder. The end of the lifting rod extending upward out of the welding platform is connected with a detachable end cover. The upper end of the detachable end cover is connected with a female seat. Guide side plates for the female seat are symmetrically fixed on the upper end surface of the welding platform, and the number of the guide side plates is 2 groups.

[0008] As a preferred embodiment of the ultrasonic welding device for terminals based on electric vehicle parts according to the present invention, wherein: a positioning groove is formed at the rear position of the upper end of the female seat, and a metal joint piece is placed in the positioning groove. A buffer groove is formed at the rear position of the upper end of the female seat. A number of limiting grooves are symmetrically formed on both sides of the buffer groove, and the number of the limiting grooves is preferably 2 - 5 groups. An inner strip-shaped adjusting groove is formed in each of the limiting grooves.

[0009] As a preferred embodiment of the ultrasonic welding device for terminals based on electric vehicle parts according to the present invention, wherein: a sub-seat is movably arranged in the buffer groove. The upper end surface of the sub-seat contacts the positioning plate during the upward movement. A number of moving blocks extending into the limiting grooves are symmetrically connected to both sides of the sub-seat, and the number of the moving blocks is preferably 2 - 5 groups. A spring clamping groove is formed at the bottom of each of the moving blocks, and a buffer spring is connected between the spring clamping groove and the limiting groove.

[0010] As a preferred embodiment of the ultrasonic welding device for terminals based on electric vehicle parts according to the present invention, wherein: a small hydraulic cylinder is horizontally installed inside each of the moving blocks. A hydraulic rod is movably arranged outward inside the small hydraulic cylinder. The end of the hydraulic rod is welded with a push block. An arc portion is arranged at the end of the push block, and the arc portion extends into the inside of an elastic stop piece for fixation. The elastic stop piece moves up and down locally along the inner strip-shaped adjusting groove, and two groups of anti-slip spring steels are included on both sides of the elastic stop piece.

[0011] As a preferred embodiment of the ultrasonic welding device for terminals based on electric vehicle parts according to the present invention, wherein: a wire releasing channel is formed through the front end surface inside the sub-seat, and a wire leading channel is formed through the rear end surface inside the sub-seat, and the wire releasing channel is communicated with the wire leading channel.

[0012] As a preferred solution of a terminal ultrasonic welding device for electric vehicle parts according to the present invention, wherein: a plurality of groups of traction wheels are equidistantly installed at the bottom of the lead channel, the number of the traction wheels is preferably 5-10 groups, and each traction wheel is provided with a friction clamping groove on its wheel surface. The friction clamping groove contacts the wire, and the stripped part of the wire extends out of the lead channel. The inside of the traction wheel is for the wheel shaft to pass through, and both ends of the wheel shaft are fixed to the inner wall of the sub-seat by the first bearing seats. One or two groups of sprockets are also sleeved on each wheel shaft, and the sprockets of adjacent traction wheels are connected and driven by a short chain. One of the wheel shafts extends outwards and is connected to a first servo motor by a coupling, and the first servo motor horizontally penetrates the outer side of the sub-seat.

[0013] As a preferred solution of a terminal ultrasonic welding device for electric vehicle parts according to the present invention, wherein: a second servo motor is fixedly arranged inside the bearing seat, the second servo motor is connected to a drive shaft by a coupling, a cam is sleeved in the middle of the drive shaft, and both ends of the drive shaft are fixed to the inner wall of the bearing seat by the second bearing seats. A mobile cleaner is arranged on the horizontal front side of the cam.

[0014] As a preferred solution of a terminal ultrasonic welding device for electric vehicle parts according to the present invention, wherein: the mobile cleaner includes a frustum, a wheel groove is formed on the rear end surface of the frustum, a pulley is rotatably arranged in the wheel groove, and a part of the pulley extends out of the wheel groove and acts on the wheel surface of the cam. A displacement rod is horizontally fixed on the front end surface of the frustum, the displacement rod passes through a positioning partition, the positioning partition is riveted at the middle position inside the storage cylinder, a return spring sleeved on the outer side of the displacement rod is fixed between the positioning partition and the frustum, and a sliding motor seat is riveted at the end of the displacement rod away from the frustum. The sliding motor seat moves linearly along the track groove inside the storage cylinder.

[0015] As a preferred solution of a terminal ultrasonic welding device for electric vehicle parts according to the present invention, wherein: a middle roller is rotatably arranged at the middle position inside the sliding motor seat, the middle roller is connected to the sliding motor seat by an inner bearing, a hollow cleaning seat is fixed to the outside of the sliding motor seat by the middle roller extending outwards. The hollow cleaning seat extends out of the storage cylinder by horizontal movement to allow the stripped part to enter its inside. A plurality of groups of first oil-absorbing cotton strips are evenly distributed on the inner wall of the hollow cleaning seat, the number of the first oil-absorbing cotton strips exceeds 10 groups, a plurality of groups of second oil-absorbing cotton strips are evenly distributed on the outer wall of the hollow cleaning seat, the second oil-absorbing cotton strips act on the upper end surface of the metal joint piece, and the number of the second oil-absorbing cotton strips exceeds 8 groups.

[0016] As a preferred embodiment of the terminal ultrasonic welding device for electric vehicle parts according to the present invention, the following is provided: A large gear is sleeved on the middle roller, a small gear is meshed and arranged on one side of the large gear, the small gear is sleeved on the output shaft of a constant-speed motor, and the constant-speed motor is horizontally fixed inside a sliding motor seat.

[0017] As a preferred embodiment of the terminal ultrasonic welding device for electric vehicle parts according to the present invention, the following is provided: A ventilation hole is penetrated and opened at the middle position inside the middle roller, a sealing shaft sleeve is installed inside the rear end of the ventilation hole, a bent pipe is arranged inside the sealing shaft sleeve, one end of the bent pipe is connected with an air supply hose, the air supply hose extends to the outside of the storage cylinder, a cold air blower is arranged inside the welding platform, and the air supply hose is connected with the air outlet of the cold air blower.

[0018] As a preferred embodiment of the terminal ultrasonic welding device for electric vehicle parts according to the present invention, the following is provided: Two groups of inner clamping grooves are symmetrically opened at the outer opening of the hollow cleaning seat, a folding structure is movably arranged in each group of inner clamping grooves, the number of the folding structures is 2 groups, the folding structure includes a folding rod, short shafts are welded to the upper and lower end faces of the folding rod, each group of short shafts is connected with the inner clamping groove by a damping bearing, one group of short shafts is connected with a third servo motor through a coupling, one end of the folding rod is connected with an air bag, and a correction curve surface acting on the peeling part is arranged at the outer end of the air bag.

[0019] The present invention provides a terminal ultrasonic welding device for electric vehicle parts through improvement. Compared with the prior art, it has the following remarkable improvements and advantages: Start the first servo motor to drive one group of traction wheels to rotate counterclockwise. Through the connection and transmission of multiple short chains, the sprockets on each group of wheel shafts rotate synchronously, and each group of traction wheels rotates synchronously. Utilize the frictional force between the friction clamping groove and the wire to pull the wire to continue moving into the wire release channel. Finally, the wire extends out from the narrow rear end face of the wire release channel and is straightened and fixed by several groups of traction wheels, achieving the function of automatically positioning the wire and avoiding the problem of poor positioning effect caused by the easy bending of the wire due to its flexibility.

[0020] The hollow cleaning base is automatically extended out of the storage cylinder, exactly making the peeling part enter the central position inside it. At this time, the uniform-speed motor is started, and through a series of transmission intermediate rollers, the hollow cleaning base is driven to make a rotational motion. On the one hand, several groups of first oil-absorbing cotton strips inside the hollow cleaning base make a circular motion to clean the outer surface of the peeling part, wiping off impurities and oil stains. On the other hand, several groups of second oil-absorbing cotton strips outside the hollow cleaning base synchronously make a circular motion. When the second oil-absorbing cotton strip passes by the metal connector piece below, it cleans the upper end surface of the metal connector piece, wiping off impurities and oil stains, enabling the welding machine to have the function of cleaning the metal sheet and the wire simultaneously, with a high degree of automation, and it can cooperate with the assembly line, saving time and effort.

[0021] The lifting cylinder is started, the lifting rod extends out, and the female seat rises linearly along the two groups of guiding side plates until the male seat and the positioning plate are in contact. At this time, the peeling part and the ultrasonic welding head are in contact. Then, the lifting rod continues to extend out, the female seat continues to rise, and several groups of buffer springs between the female seat and the male seat are compressed until the metal connector piece contacts the peeling part and performs a squeezing action in cooperation with the ultrasonic welding head. Using the passive welding method to replace the active movement of the ultrasonic welding head, on the one hand, it has the effect of prolonging the service life of the ultrasonic welding head and the horn and improving the stability of the ultrasonic welding head during operation. On the other hand, the buffer springs are used to automatically adjust and buffer the contact force among the three, avoiding the occurrence of damage to the ultrasonic welding head and wire breakage.

[0022] When the pressure value detected by the pressure sensor on the ultrasonic welding head reaches the standard value, several groups of small hydraulic cylinders are started, the hydraulic rods extend out, and the push block drives the elastic stop piece to continue to displace and insert deeper into the inner strip-shaped groove. The two groups of anti-slip spring steels are respectively squeezed by the groove walls of the inner strip-shaped groove, forming a bent and contracted state, so that the elastic stop piece is stuck in the inner strip-shaped groove. The simultaneous action of several groups of elastic stop pieces, in cooperation with the pressure sensor, enables the male seat to be accurately positioned on the female seat, improving the stability of the workpiece during welding and the crimping quality, and ensuring that the terminal will not be affected by the reaction force of the spring when the male seat and the female seat descend, having a protective effect.

[0023] The third servo motor is started, the short shaft drives the folding rod to flip 90°, and the two groups of folding rods respectively extend into the outer openings of the hollow cleaning base, forming a centered straightening space. When the hollow cleaning base returns to its original position, the copper wire of the peeling part passes through the straightening space and generates a relative force when contacting the two groups of straightening curved surfaces. On the one hand, it flexibly straightens the deformed copper wire to avoid contact damage and improve the welding quality. On the other hand, it performs a secondary wiping on the peeling part to improve the cleaning effect. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall structure of a terminal ultrasonic welding device for electric vehicle parts according to the present invention; Figure 2 Schematic diagram of the structure inside the guiding side plate of the present invention; Figure 3 Schematic diagram of the connection of the ultrasonic welding head of the present invention; Figure 4 Schematic diagram of the driving structure of the female seat of the present invention; Figure 5 Schematic diagram of the connection between the female seat and the male seat of the present invention; Figure 6 Specific structural diagram of the female seat of the present invention; Figure 7 External structural diagram of the male seat of the present invention; Figure 8 Specific structural diagram of the elastic stop piece of the present invention; Figure 9 Cross-sectional view of the male seat of the present invention; Figure 10 Schematic diagram of the transmission structure of the traction wheel of the present invention; Figure 11 Schematic diagram of the driving structure of the mobile cleaner of the present invention; Figure 12 Specific structural diagram of the mobile cleaner of the present invention; Figure 13 Schematic diagram of the internal structure of the sliding motor base of the present invention; Figure 14 Schematic diagram of the internal structure of the hollow cleaning base in the second embodiment of the present invention; Figure 15 Specific structural diagram of the folding structure of the present invention.

[0025] In the figure: 1. welding platform; 2. support frame; 3. bearing seat; 4. ultrasonic welding body; 5. control panel; 6. positioning plate; 7. amplitude rod; 8. ultrasonic welding head; 10. lifting cylinder; 11. lifting rod; 12. detachable end cover; 13. mother seat; 14. positioning groove; 15. metal joint piece; 16. buffer groove; 17. limit groove; 18. inner strip adjustment groove; 20. sub-seat; 21. moving block; 22. spring clamping groove; 23. buffer spring; 24. wire release channel; 25. lead channel; 26. wire; 27. stripping part; 30. small hydraulic cylinder; 31. hydraulic rod; 32. push block; 33. arc part; 34. elastic stopper; 35. anti-skid spring steel; 40. traction wheel; 41. friction clamping groove; 42. axle; 43. first bearing seat; 44. sprocket; 45. short Chain; 46, first servo motor; 50, second servo motor; 51, drive shaft; 52, cam; 53, second bearing seat; 60, mobile cleaner; 61, round table; 62, wheel groove; 63, pulley; 64, displacement rod; 65, positioning partition; 66, return spring; 67, sliding motor seat; 68, storage cylinder; 70, intermediate roller; 71, inner bearing; 72, hollow cleaning seat; 73, No. 1 oil-absorbing cotton strip; 74, No. 2 oil-absorbing cotton strip; 75, large gear; 76, small gear; 77, uniform speed motor; 80, folding structure; 81, folding rod; 82, short shaft; 83, damping bearing; 84, third servo motor; 85, air bag; 86, correction surface; 90, guide side plate; 91, ventilation hole; 92, sealing bushing; 93, elbow; 94, air supply hose; 95, inner slot. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Embodiment 1

[0027] like Figure 1-13As shown in the figure, this embodiment provides a terminal ultrasonic welding device for electric vehicle parts, including a welding platform 1. A support frame 2 is arranged at the lower end of the welding platform 1, and the support frame 2 has a supporting function. A bearing seat 3 is arranged at the rear position on the upper end of the welding platform 1, and the bearing seat 3 has the functions of bearing and storing. An ultrasonic welding machine body 4 is installed on the upper end of the bearing seat 3. A control panel 5 is arranged on the front end face of the ultrasonic welding machine body 4. The control panel 5 includes a display and control buttons. A horn 7 is arranged at the lower end of the ultrasonic welding machine body 4. An ultrasonic welding head 8 is connected to the lower end of the horn 7. A pressure sensor is installed on the ultrasonic welding head 8 for detecting the crimping pressure value.

[0028] Among them, a positioning plate 6 is horizontally arranged at the position on the front end face of the ultrasonic welding machine body 4 close to the horn 7. The position of the positioning plate 6 is set according to the actual situation. A lifting cylinder 10 is vertically installed inside the welding platform 1 and below the positioning plate 6. A lifting rod 11 is movably arranged upward inside the lifting cylinder 10. The end of the lifting rod 11 extending upward out of the welding platform 1 is connected with a detachable end cover 12. A female seat 13 is connected to the upper end of the detachable end cover 12. The female seat 13 can be detached and replaced from the detachable end cover 12. Guide side plates 90 for the female seat 13 are symmetrically fixed on the upper end face of the welding platform 1, playing a role of limiting and guiding. As Figures 2-4 shown.

[0029] Specifically, a positioning groove 14 is opened at the rear position on the upper end of the female seat 13. A metal joint piece 15 is placed in the positioning groove 14, and their sizes are adapted to each other. A buffer groove 16 is opened at the rear position on the upper end of the female seat 13. A number of groups of limiting grooves 17 are symmetrically opened on both sides of the buffer groove 16. An inner strip-shaped adjustment groove 18 is opened in each group of limiting grooves 17. The deepest position of the inner strip-shaped adjustment groove 18 is a curved surface. As Figure 5 and Figure 6 shown.

[0030] Furthermore, a sub-seat 20 is movably arranged in the buffer groove 16. The upper end face of the sub-seat 20 contacts the positioning plate 6 during the upward movement process, and the contact position remains horizontal. A number of groups of moving blocks 21 extending into the limiting grooves 17 are symmetrically connected to both sides of the sub-seat 20. A spring clamping groove 22 is opened at the bottom of each group of moving blocks 21. The spring clamping groove 22 and the limiting groove 17 are connected by a buffer spring 23. A number of groups of buffer springs 23 provide a supporting force for the sub-seat 20. As Figure 5 and Figure 7 shown.

[0031] Among them, a small hydraulic cylinder 30 is horizontally installed inside each group of moving blocks 21. A hydraulic rod 31 is movably arranged outward inside the small hydraulic cylinder 30. A push block 32 is welded to the end of the hydraulic rod 31. An arc portion 33 is arranged at the end of the push block 32. The arc portion 33 extends into the inside of the elastic stop piece 34 and is fixed. The elastic stop piece 34 moves up and down locally along the inner strip-shaped adjustment groove 18. Both sides of the elastic stop piece 34 include two groups of anti-slip spring steels 35. The anti-slip spring steels 35 have the characteristic of deformation and reset, as Figure 8 shown.

[0032] Furthermore, a wire releasing channel 24 is opened through the front end face inside the sub-seat 20, and a lead wire channel 25 is opened through the rear end face inside the sub-seat 20. The lead wire channel 25 gradually narrows from front to back. The wire releasing channel 24 and the lead wire channel 25 are connected. When taking the part, the terminal can be pulled out from the lead wire channel 25, as Figure 9 shown.

[0033] Among them, a number of groups of traction wheels 40 are equidistantly installed at the bottom of the lead wire channel 25. A friction clamping groove 41 is arranged on the wheel surface of each group of traction wheels 40, which has an inward concave friction pattern design. The friction clamping groove 41 contacts the wire 26. The peeled portion 27 of the wire 26 extends out of the lead wire channel 25. The inside of the traction wheel 40 is for the wheel shaft 42 to pass through. Both ends of the wheel shaft 42 are fixed to the inner wall of the sub-seat 20 by the first bearing seats 43, as Figure 9 and Figure 10 shown.

[0034] Among them, 1-2 groups of sprockets 44 are also sleeved on each group of wheel shafts 42. The sprockets 44 of adjacent traction wheels 40 are connected and driven by a short chain 45. One of the wheel shafts 42 extends outward and is connected by a coupling to a first servo motor 46. The first servo motor 46 is horizontally arranged through the outer side surface of the sub-seat 20, as Figure 9 and Figure 10 shown.

[0035] Furthermore, a second servo motor 50 is fixedly arranged inside the bearing seat 3. The second servo motor 50 is connected by a coupling to a drive shaft 51. A cam 52 is sleeved in the middle of the drive shaft 51. The cam 52 includes an arc protruding portion. Both ends of the drive shaft 51 are fixed to the inner wall of the bearing seat 3 by the second bearing seats 53. A mobile cleaner 60 is arranged on the horizontal front side of the cam 52, as Figure 11 shown.

[0036] In this embodiment, the mobile cleaner 60 includes a frustum 61. A wheel groove 62 is opened on the rear end face of the frustum 61. A pulley 63 is rotatably arranged in the wheel groove 62. A part of the pulley 63 extends out of the wheel groove 62 and acts on the wheel surface of the cam 52, as Figure 11 and Figure 12 shown.

[0037] In this embodiment, a displacement rod 64 is horizontally fixed to the front end face of the frustum 61. The displacement rod 64 passes through the positioning partition 65. A limiting hole for the movement of the displacement rod 64 is provided in the middle of the positioning partition 65. The positioning partition 65 is riveted to the middle position inside the storage cylinder 68. The storage cylinder 68 is horizontally fixed to the middle position of the front end face of the bearing seat 3. A return spring 66 sleeved outside the displacement rod 64 is fixed between the positioning partition 65 and the frustum 61. One end of the displacement rod 64 away from the frustum 61 is riveted with a sliding motor seat 67. The sliding motor seat 67 moves linearly along the track groove inside the storage cylinder 68, playing a role of limiting and guiding, as Figure 2 and Figure 12 shown.

[0038] Specifically, a middle roller 70 is rotatably arranged at the middle position inside the sliding motor seat 67. The middle roller 70 is connected to the sliding motor seat 67 by an inner bearing 71. A hollow cleaning seat 72 is fixed to the outside of the middle roller 70 extending from the sliding motor seat 67. The hollow cleaning seat 72 extends out of the storage cylinder 68 by horizontal movement, allowing the peeling part 27 to enter its interior. A number of groups of first oil-absorbing cotton strips 73 are evenly distributed on the inner wall of the hollow cleaning seat 72. A number of groups of second oil-absorbing cotton strips 74 are evenly distributed on the outer wall of the hollow cleaning seat 72. The second oil-absorbing cotton strips 74 act on the upper end face of the metal connector piece 15. The moving speeds of the first oil-absorbing cotton strips 73 and the second oil-absorbing cotton strips 74 are adjustable, and it is necessary to regularly remove oil and clean both of them, as Figure 12 and Figure 13 shown.

[0039] Among them, a large gear 75 is sleeved on the middle roller 70. A small gear 76 is meshed on one side of the large gear 75. The small gear 76 is sleeved on the output shaft of the constant-speed motor 77. The constant-speed motor 77 is horizontally fixed inside the sliding motor seat 67, as Figure 13 shown.

[0040] Furthermore, a ventilation hole 91 is penetrated through the middle position inside the middle roller 70. A sealing shaft sleeve 92 is installed inside the rear end of the ventilation hole 91, which has a sealing function. A bent pipe 93 is arranged inside the sealing shaft sleeve 92. The bent pipe 93 and the middle roller 70 move relative to each other by means of the sealing shaft sleeve 92. One end of the bent pipe 93 is connected with an air supply hose 94. The air supply hose 94 can move along with the movement of the sliding motor seat 67. The air supply hose 94 extends to the outside of the storage cylinder 68. A cold air blower is arranged inside the welding platform 1. The air supply hose 94 is connected to the air outlet of the cold air blower, as Figure 12 and Figure 13 shown.

[0041] When this embodiment is in use, first place the metal joint piece 15 into the prefabricated positioning groove 14 for positioning, and then place one end of the wire 26 with the stripping part 27 into the wire feeding channel 24, so that it locally contacts the friction clamping grooves 41 of several groups of traction wheels 40. At this time, start the first servo motor 46 to drive one group of traction wheels 40 to rotate counterclockwise. Through the connection and transmission of multiple short chains 45, the sprockets 44 on each group of axle shafts 42 rotate synchronously, and each group of traction wheels 40 rotates synchronously. Utilizing the frictional force between the friction clamping grooves 41 and the wire 26, the wire 26 is pulled to continue moving into the wire feeding channel 24. Since the inner diameter of the wire feeding channel 24 becomes smaller and smaller, finally the wire 26 extends out from the narrow rear end face of the wire feeding channel 24 and is fixed in cooperation with several groups of traction wheels 40.

[0042] At this time, first start the second servo motor 50. The drive shaft 51 drives the cam 52 to rotate. The protruding part of the cam 52 acts on the wheel surface of the pulley 63 during the circular motion, generating a squeezing force that causes the straight-line motion of the frustum 61 and the displacement rod 64 (the return spring 66 is compressed), thereby driving the sliding motor base 67 to move linearly along the track groove inside the receiving cylinder 68, so that the hollow cleaning seat 72 extends out of the receiving cylinder 68, just enabling the stripping part 27 to enter the central position inside it. At this time, start the uniform speed motor 77, and the small gear 76 rotates. Through meshing and deceleration, the large gear 75 rotates accordingly, and the intermediate roller 70 drives the hollow cleaning seat 72 to perform a rotational motion. On the one hand, several groups of first oil-absorbing cotton strips 73 inside the hollow cleaning seat 72 perform circular motion to clean the outer surface of the stripping part 27, wiping off impurities and oil stains. On the other hand, several groups of second oil-absorbing cotton strips 74 outside the hollow cleaning seat 72 perform circular motion synchronously. When the second oil-absorbing cotton strips 74 pass by the metal joint piece 15 below, they clean the upper end surface of it, wiping off impurities and oil stains. When the protruding part of the cam 52 leaves the wheel surface of the pulley 63, under the reset action of the return spring 66, the hollow cleaning seat 72 returns to the inside of the receiving cylinder 68 again.

[0043] At this time, start the lifting cylinder 10. The lifting rod 11 extends out, driving the female seat 13 to rise linearly along the two groups of guiding side plates 90. The male seat 20 rises accordingly until the male seat 20 fits with the positioning plate 6. At this time, the stripping part 27 abuts against the ultrasonic welding head 8. Then let the lifting rod 11 continue to extend out, and the female seat 13 continues to rise, and squeeze several groups of buffer springs 23 between the female seat 13 and the male seat 20, causing relative motion between several groups of moving blocks 21 and the limiting grooves 17 to play a guiding role until the metal joint piece 15 contacts the stripping part 27 and performs a squeezing action on it in cooperation with the ultrasonic welding head 8, causing it to undergo slight deformation. Until the pressure value detected by the pressure sensor on the ultrasonic welding head 8 reaches the standard value, the lifting rod 11 stops moving.

[0044] At this time, several groups of small hydraulic cylinders 30 are synchronously started, the hydraulic rods 31 extend out, and the push block 32 drives the elastic stop piece 34 to continue to displace and insert into a deeper position in the inner strip-shaped adjustment groove 18. The two sets of anti-slip spring steels 35 in the open state are respectively squeezed by the groove walls of the inner strip-shaped adjustment groove 18, forming a bent and contracted state, so that the elastic stop piece 34 is clamped in the inner strip-shaped adjustment groove 18 through the contact force. The several groups of elastic stop pieces 34 act simultaneously, so that the sub-seat 20 is accurately positioned on the mother seat 13.

[0045] At this time, the transducer inside the ultrasonic welding machine body 4 receives the high-frequency electrical signal of the generator, generates mechanical vibration through the piezoelectric effect or magnetostrictive effect, the amplitude transformer rod 7 amplifies the vibration amplitude and then transmits it to the ultrasonic welding head 8, and the ultrasonic welding head 8 concentrates the high-frequency vibration on the contact surface between the stripping part 27 and the metal joint piece 15. Microscopic friction occurs on the contact surface, resulting in intense movement between material molecules. The frictional heat causes the local temperature of the material to rapidly rise to the melting point. The molten material molecules diffuse and penetrate each other, forming intermolecular bonding. After the vibration stops, it is maintained for 1 - 3 seconds, and the material cools and solidifies under pressure to form a terminal, completing the welding process.

[0046] At this time, let the lifting rod 11 return downward, thereby driving the mother seat 13 and the sub-seat 20 to move linearly downward (at this time, the sub-seat 20 is still in the positioned state to ensure sufficient time for the terminal to solidify), until the terminal descends to the horizontal position of the storage cylinder 68. Let the cold air blower work, and the cold air is made to pass through the air supply hose 94, the elbow 93, and the ventilation hole 91 in sequence and enter the hollow cleaning seat 72, and then blow horizontally from the hollow cleaning seat 72 to the terminal area to accelerate its cooling process, achieving the purpose of automatic temperature reduction. At the same time, the cooling air removes impurities from the first oil-absorbing cotton strip 73 inside the hollow cleaning seat 72. Embodiment 2

[0047] On the basis of Embodiment 1, the copper wires of the stripping part 27 of the wire 26 are prone to deformation and bending after positioning and cleaning. When the bent copper wires are welded to the metal joint piece 15, molten adhesive material will occur, resulting in poor welding quality and not meeting the factory specifications of the terminal. To solve the above technical problems, two groups of inner clamping grooves 95 are symmetrically opened at the outer opening of the hollow cleaning seat 72, and a folding structure 80 is movably arranged in each group of inner clamping grooves 95, as Figure 14 and 15 shown.

[0048] Specifically, the folding structure 80 includes a folding rod 81. Short shafts 82 are welded to the upper and lower end faces of the folding rod 81. Each group of short shafts 82 is connected to the inner clamping groove 95 by a damping bearing 83. The damping bearing 83 has a certain damping force to prevent its self-rotation. One group of short shafts 82 is connected to a third servo motor 84 through a coupling.

[0049] One end of the folding rod 81 is connected with an airbag 85. The airbag 85 has the function of flexible straightening and adapts to the contact strength of the copper wire. A correction curve surface 86 acting on the peeling part 27 is arranged at the outer end of the airbag 85.

[0050] When this embodiment is in use, the folding structure 80 is initially in the inner card slot 95 and in a folded state, so as not to interfere with the cleaning work. After the hollow cleaning seat 72 finishes cleaning the peeling part 27 and the metal joint piece 15, the third servo motor 84 is started. The short shaft 82 drives the folding rod 81 to flip 90° (the folding rod 81 rotates around the two groups of damping bearings 83). The two groups of folding rods 81 respectively extend into the outer openings of the hollow cleaning seat 72 to form a centered straightening space. When the hollow cleaning seat 72 returns to its position, the copper wire of the peeling part 27 passes through the straightening space and contacts the two groups of correction curve surfaces 86 to generate a relative acting force. On the one hand, it flexibly straightens the deformed copper wire, and on the other hand, it uses the airbag fabric to wipe the peeling part 27 for the second time to improve the cleaning effect.

[0051] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to this process, method, article or device.

[0052] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic welding device for terminals of electric vehicle parts, comprising a welding platform (1), characterized in that: A lifting cylinder (10) is vertically installed inside the welding platform (1) and below the positioning plate (6); a lifting rod (11) is movably arranged inside the lifting cylinder (10) so as to move upward; the end of the lifting rod (11) extending upward from the welding platform (1) is connected to a detachable end cover (12); the upper end of the detachable end cover (12) is connected to a female seat (13); A buffer groove (16) is provided at the rear end of the upper end of the mother seat (13); a plurality of groups of limiting grooves (17) are symmetrically provided on both sides of the buffer groove (16); an inner strip-shaped adjustment groove (18) is provided in each group of the limiting grooves (17); a sub-seat (20) is movably provided in the buffer groove (16); the upper end surface of the sub-seat (20) contacts the positioning plate (6) during the upward movement; a plurality of groups of moving blocks (21) extending into the limiting groove (17) are symmetrically connected on both sides of the sub-seat (20); a spring slot (22) is provided at the bottom of each group of the moving blocks (21); the spring slot (22) and the limiting groove (17) are connected by a buffer spring (23); A small hydraulic cylinder (30) is horizontally installed inside each group of the moving blocks (21), a hydraulic rod (31) is movably arranged inside the small hydraulic cylinder (30), a push block (32) is welded to the end of the hydraulic rod (31), an arc portion (33) is arranged at the end of the push block (32), the arc portion (33) extends into the inside of an elastic stop plate (34) for fixing, the elastic stop plate (34) moves up and down along a part of the inner strip adjustment groove (18), and two sides of the elastic stop plate (34) include two groups of anti-slip spring steel (35).

2. The terminal ultrasonic welding equipment based on electric vehicle parts according to claim 1 is characterized in that: A support frame (2) is arranged at the lower end of the welding platform (1), a bearing seat (3) is arranged at the rear position of the upper end of the welding platform (1), an ultrasonic welding body (4) is installed at the upper end of the bearing seat (3), a control panel (5) is arranged at the front end surface of the ultrasonic welding body (4), a variable amplitude rod (7) is arranged at the lower end of the ultrasonic welding body (4), an ultrasonic welding head (8) is connected to the lower end of the variable amplitude rod (7), a pressure sensor is installed on the ultrasonic welding head (8), and a positioning plate (6) is horizontally arranged at a position close to the variable amplitude rod (7) on the front end surface of the ultrasonic welding body (4).

3. The terminal ultrasonic welding equipment based on electric vehicle parts according to claim 2 is characterized in that: A positioning groove (14) is provided at the rear end of the upper end of the mother seat (13), a metal connector piece (15) is placed in the positioning groove (14), a wire laying channel (24) is provided inside the sub-seat (20) and passes through the front end surface, and a wire lead channel (25) is provided inside the sub-seat (20) and passes through the rear end surface, the wire lead channel (25) gradually narrows from front to back, and the wire laying channel (24) and the wire lead channel (25) are connected.

4. The terminal ultrasonic welding equipment based on electric vehicle parts according to claim 3 is characterized in that: A plurality of groups of traction wheels (40) are equidistantly mounted at the bottom of the wire guide channel (25). A friction clamping groove (41) is arranged on the wheel surface of each group of traction wheels (40). The friction clamping groove (41) contacts the wire (26). The stripped portion (27) of the wire (26) extends out of the wire guide channel (25). The inside of the traction wheel (40) is provided with a wheel axle (42) passing through. Both ends of the wheel axle (42) are fixed by means of a first bearing seat (43) and an inner wall of a sub-seat (20). One to two groups of sprocket wheels (44) are also sleeved on each group of the wheel axles (42). The sprocket wheels (44) of adjacent traction wheels (40) are connected for transmission by means of a short chain (45).

5. The terminal ultrasonic welding equipment based on electric vehicle parts according to claim 2 is characterized in that: A second servo motor (50) is fixedly arranged inside the bearing seat (3); the second servo motor (50) is connected to a drive shaft (51) via a coupling; a cam (52) is sleeved in the middle of the drive shaft (51); both ends of the drive shaft (51) are fixed by means of a second bearing seat (53) and the inner wall of the bearing seat (3); and a mobile cleaner (60) is arranged on the horizontal front side of the cam (52).

6. The terminal ultrasonic welding equipment based on electric vehicle parts according to claim 5 is characterized in that: The mobile cleaner (60) comprises a round table (61), a wheel groove (62) is formed on the rear end surface of the round table (61), a pulley (63) is rotatably arranged in the wheel groove (62), a part of the pulley (63) extends out of the wheel groove (62) and acts on the wheel surface of the cam (52), a displacement rod (64) is horizontally fixed on the front end surface of the round table (61), the displacement rod (64) passes through a positioning partition (65), the positioning partition (65) is riveted to the middle position inside the storage tube (68), a return spring (66) sleeved on the outside of the displacement rod (64) is fixed between the positioning partition (65) and the round table (61), and a sliding motor seat (67) is riveted to one end of the displacement rod (64) away from the round table (61), and the sliding motor seat (67) moves linearly along the track groove inside the storage tube (68).

7. The terminal ultrasonic welding equipment based on electric vehicle parts according to claim 6 is characterized in that: An intermediate roller (70) is rotatably arranged at the middle position inside the sliding motor seat (67). The intermediate roller (70) is connected to the sliding motor seat (67) by means of an inner bearing (71). The intermediate roller (70) is extended to the outside of the sliding motor seat (67) and fixed with a hollow cleaning seat (72). The hollow cleaning seat (72) extends out of the storage cylinder (68) by horizontal movement to allow the peeling part (27) to enter the inside. A plurality of groups of No. 1 oil-absorbing cotton strips (73) are evenly distributed on the inner wall of the hollow cleaning seat (72). A plurality of groups of No. 2 oil-absorbing cotton strips (74) are evenly distributed on the outer wall of the hollow cleaning seat (72). The No. 2 oil-absorbing cotton strips (74) act on the upper end surface of the metal joint sheet (15).

8. The terminal ultrasonic welding equipment based on electric vehicle parts according to claim 7 is characterized in that: A large gear (75) is sleeved on the intermediate roller (70), a small gear (76) is meshedly provided on one side of the large gear (75), and the small gear (76) is sleeved on the output shaft of a constant speed motor (77), and the constant speed motor (77) is horizontally fixed inside the sliding motor seat (67).

9. The terminal ultrasonic welding equipment based on electric vehicle parts according to claim 8 is characterized in that: A ventilation hole (91) is provided through the middle position of the interior of the intermediate roller (70); a sealing sleeve (92) is installed inside the rear end of the ventilation hole (91); a curved pipe (93) is provided inside the sealing sleeve (92); one end of the curved pipe (93) is connected to an air supply hose (94); and the air supply hose (94) extends to the outside of the storage tube (68).

10. The terminal ultrasonic welding equipment based on electric vehicle parts according to claim 9 is characterized in that: Two groups of inner slots (95) are symmetrically provided at the outer opening of the hollow cleaning seat (72), and a folding structure (80) is movably provided in each group of the inner slots (95). The folding structure (80) comprises a folding rod (81), and short shafts (82) are welded to the upper and lower end surfaces of the folding rod (81). Each group of the short shafts (82) is connected to the inner slots (95) by means of a damping bearing (83), and one group of the short shafts (82) is connected to a third servo motor (84) via a coupling. An air bag (85) is connected to one end of the folding rod (81), and a correction curved surface (86) acting on the peeling portion (27) is provided at the outer end of the air bag (85).

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