Welding equipment for electro-tricycle production

Abstract

The invention relates to the technical field of electro-tricycle production, and discloses a welding device for electro-tricycle production, which comprises a device shell, a welding unit and a fixing unit, the welding unit and the fixing unit are both located in the device shell, and the fixing unit can position and fix a workpiece to be welded. According to the laser welding device, through a hydraulic self-adaptive mechanism in the fixing unit, when a workpiece is slightly deviated due to welding stress, a fixing piece on the inner side of a fixing ring transmits pressure change to an adjusting plate through a driving rod, and then hydraulic pressure in a pressure adjusting bin is changed; due to the fact that the left pressure adjusting bin and the right pressure adjusting bin are communicated through the conveying pipeline, pressure changes can be transmitted instantly and drive the opposite side fixing pieces to generate compensation motion, a dynamic balance closed-loop force system is formed, it is guaranteed that a workpiece is evenly and stably clamped all the time in the welding process, and thermal deformation and welding dislocation are effectively restrained.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric tricycle production, and particularly relates to a welding equipment for electric tricycle production. BACKGROUND

[0002] The electric tricycle is a three-wheeled transport tool for pulling goods or people, which is powered by a battery and driven by an electric motor. The electric tricycle adopts a tube type large capacity, left and right lining, deep discharge, and traction type battery, which can meet the requirements of long-time work and continuous discharge. The battery can be used normally for two years without reducing the capacity. The electric motor of the electric tricycle adopts a direct current series excitation traction type brush or brushless motor. The motor is provided with a speed regulating and force increasing device inside, which is not easy to be damaged in normal use, thereby ensuring the strong output power. Therefore, a professional welding equipment needs to be used in the production process of the electric tricycle.

[0003] A welding equipment for electric tricycle production is disclosed in Chinese Patent No. CN220838592U, which relates to the technical field of electric tricycle production and comprises a workbench and a frame assembly. The frame assembly is fixed on the workbench and further comprises a welding assembly. The welding assembly comprises a movable arm, a fixed seat and a support. The support is fixed at the middle of the top of the workbench, the movable arm is rotatably connected to the top of the support, the movable arm can rotate 360 degrees around the axis of the support, and the fixed seat is movably connected to the free end of the movable arm. The bottom of the fixed seat is fixed with a welding head, which is used for welding the frame assembly. The movable arm can be folded, and the folding angle is within the range of 30 degrees to 90 degrees. The top of the fixed seat is fixed with a moving block, and the top of the fixed seat is provided with a sliding groove. The bottom of the moving block extends into the sliding groove and is fixedly connected with the welding head. The welding equipment can complete the welding work at the connection without moving the frame assembly, and the welding is flexible and convenient to operate.

[0004] According to the above-mentioned prior art, it is found that the traditional welding equipment adopts a rigid clamping method when fixing the workpiece, which cannot effectively cope with the micro deformation of the workpiece caused by thermal stress during the welding process. This will cause slight deviation or vibration of the workpiece during the welding process, resulting in inaccurate welding points and unstable weld quality. In addition, for long shaft type workpieces such as electric tricycle frames, macroscopic bending deformation may occur due to heat accumulation during continuous welding. The existing equipment lacks effective real-time correction means, and often needs to be corrected manually after welding or directly scrapped, which seriously affects the production efficiency and product qualification rate. SUMMARY

[0005] The present application aims to provide a welding equipment for electric tricycle production to solve the problems in the background art.

[0006] To achieve the above object, the present application provides the following technical scheme: a welding equipment for production of electric tricycles, comprising an equipment shell, a welding unit and a fixing unit, the welding unit and the fixing unit are located inside the equipment shell, and the fixing unit can position and fix the workpiece to be welded, the welding unit comprises a laser welding equipment, the laser welding equipment is located above a mounting plate, and the laser welding equipment is rotationally connected with the surface of the mounting plate; The fixing unit comprises a longitudinal magnetic rail, an electromagnetic slider adapted to the outer surface of the longitudinal magnetic rail is slidably arranged on the outer surface of the longitudinal magnetic rail, the electromagnetic slider can slide on the outer surface of the longitudinal slide rail, a support plate is arranged on the top of the electromagnetic slider, a sliding block is arranged in the inside of the support plate, the support plate is provided with a fixing ring through the sliding block, and the fixing ring can fixedly hold the outer side of the workpiece to be welded; A driving rod is arranged in the inside of the fixing ring, the driving rod is slidably arranged in the inside of the fixing ring, fixing pieces and adjusting plates are respectively arranged at the left and right ends of the driving rod, the adjusting plates are located at the outer side region of the fixing ring, the fixing pieces are located at the inner diameter of the fixing ring, a compression spring is arranged between the driving rod and the adjusting plate, and a pressure adjusting chamber is arranged on the outer side of the fixing piece.

[0007] Preferably, the equipment shell comprises a workbench, an emergency stop button is arranged on the outer surface of the workbench, the emergency stop button is used to stop welding and fixing work in an emergency state, a hydraulic push rod is arranged in the inside of the workbench, and a mounting plate is slidably arranged on the output end of the hydraulic push rod; The output end of the hydraulic push rod penetrates the mounting plate and is connected with the welding unit, the welding unit and the hydraulic push rod are arranged in an inclined manner, the hydraulic push rod can drive the welding unit to move in the direction of elongation or contraction, so as to adjust the working height of the welding unit, an operation button is arranged above the emergency stop button of the workbench, and the operation button is used to control the welding unit and the fixing unit to work.

[0008] Preferably, the welding unit comprises a laser welding equipment, the laser welding equipment is located above a mounting plate, the laser welding equipment is rotationally connected with the surface of the mounting plate, a rotary motor is arranged on the top of the laser welding equipment, the rotary motor can drive the laser welding equipment to rotate above the mounting plate, so as to meet the welding work of workpieces in multiple area angles, and a welding head is arranged on one side of the laser welding equipment, the welding head is used for surface welding work on the workpiece to be welded.

[0009] Preferably, a linear drive equipment is arranged on one side of the support plate, the output end of the linear drive equipment penetrates the support plate, the output end of the linear drive equipment is fixedly connected with one side of the sliding block, and the linear drive equipment can drive the sliding block to slide horizontally along the support plate. When the longitudinal slide rail, electromagnetic slider, linear drive device and sliding block cooperate with each other, they can drive the fixed ring to move in multiple axes and fix the outer side of the workpiece to be welded.

[0010] Preferably, a micro motor is provided between the fixed ring and the sliding plate, the output end of the micro motor is connected to the bottom of the fixed ring, and the fixed ring driven by the micro motor rotates above the sliding block. A linear double-end drive device is provided at the bottom of the fixed ring. The output end of the linear dual-end drive device is provided with a connecting rod. The end of the connecting rod away from the linear dual drive device is connected to one side of the fixed ring. The fixed ring has an open-loop design structure. The linear dual-end drive device can adjust the opening size of the fixed ring using multiple connecting rods.

[0011] Preferably, the pressure regulating chamber is provided with a partition plate inside, the pressure regulating chamber is filled with liquid, the regulating plate is in close contact with the interior of the pressure regulating chamber, and together with the partition plate forms an independent piston chamber, a conveying pipe is connected to one side of the pressure regulating chamber, and an electric pump is provided on the outside of the end of the conveying pipe near the pressure regulating chamber.

[0012] Preferably, there are multiple fixed plates, drive rods, adjusting plates, dividing plates, and compression springs, and each fixed plate, drive rod, adjusting plate, and compression spring is mirror-arranged on the left and right sides of the fixed ring. The number of pressure regulating chambers is at least two, and the two pressure regulating chambers are symmetrically arranged on the left and right sides of the fixed ring.

[0013] Preferably, when the fixing plate is under pressure, the drive rod slides inside the fixing ring, the adjusting plate moves away from the fixing ring, and the internal hydraulic pressure of the pressure regulating chamber is in a rising state. When the fixing plate is not under pressure, the compression spring is in a neutral state, and the adjusting plate is in close contact with the outer surface of the fixing ring.

[0014] Preferably, the two pressure regulating chambers are interconnected by a conveying pipe. The dividing plate in the pressure regulating chamber can divide the space inside the pressure regulating chamber into multiple independent chambers. The number of conveying pipes is set to multiple, and each conveying pipe is interconnected with the formed independent chamber. Each fixing plate is equipped with a pressure sensor, which can detect the pressure data generated by the contact between the fixing plate and the welded part in real time.

[0015] The technical effects and advantages of this invention are as follows: 1. This invention utilizes a hydraulic adaptive mechanism within the fixed unit. When welding stress causes a slight shift in the workpiece, the fixing plate on the inner side of the fixing ring transmits the pressure change to the adjusting plate via a drive rod, thereby altering the hydraulic pressure within the pressure regulating chamber. Since the left and right pressure regulating chambers are connected via a delivery pipeline, the pressure change can be transmitted instantaneously and drive the fixing plate on the opposite side to generate compensating motion, forming a dynamically balanced closed-loop force system. This ensures that the workpiece is always clamped evenly and stably during the welding process, effectively suppressing thermal deformation and welding misalignment.

[0016] 2. This invention can intelligently determine the overall offset trend of the workpiece by using data fed back from pressure sensors on multiple fixed rings. By coordinating the movement of the electromagnetic slider on the longitudinal slide rail, the lateral drive of the sliding block by the linear drive device, and the rotation of the fixed ring by the micro motor, the system can perform multi-degree-of-freedom "straightening" operations on the workpiece. This intelligent correction mechanism, which is from local self-adaptation to global coordination, is particularly suitable for welding long shaft workpieces, fundamentally ensuring the welding accuracy of complex structural parts.

[0017] 3. This invention adopts an open-loop design for the fixed ring, and the opening size is controlled by a linear double-end drive device through a connecting rod, which can quickly adapt to workpieces of different sizes. The welding unit adjusts the working height through a hydraulic push rod, and the laser welding equipment is driven by a rotary motor for multi-angle positioning, which greatly expands the welding range. This highly flexible and automated design reduces the dependence on operator skills and significantly improves production efficiency and operational safety. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a front view of the overall structure of the present invention; Figure 3 This is a side view of the overall structure of the present invention; Figure 4 This is a schematic diagram of the longitudinal slide rail and sliding block installation state of the present invention; Figure 5 This is a schematic diagram of the fixing ring and related structures of the present invention; Figure 6 This is a schematic diagram of the fixed ring in the open state of the present invention; Figure 7 This is a schematic diagram of the assembly state of the conveying pipe and the fixing ring of the present invention.

[0019] In the diagram: 1. Equipment housing; 101. Workbench; 102. Cooling fan; 103. Emergency stop button; 104. Operation button; 2. Welding unit; 201. Laser welding equipment; 202. Rotary motor; 203. Hydraulic push rod; 204. Mounting plate; 3. Fixing unit; 301. Longitudinal slide rail; 302. Support plate; 303. Electromagnetic slider; 304. Linear drive device; 305. Pressure regulating chamber; 306. Fixing ring; 307. Sliding block; 308. Fixing plate; 309. Linear double-end drive device; 310. Connecting rod; 311. Drive rod; 312. Conveying pipe; 313. Adjusting plate. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0021] This invention provides, for example Figures 1 to 7 The welding equipment shown includes a housing 1, a welding unit 2, and a fixing unit 3. The welding unit 2 and the fixing unit 3 are both located inside the housing 1. The fixing unit 3 can position and fix the workpiece to be welded, so as to avoid the workpiece shifting during the welding process and thus affecting the welding quality. The welding unit 2 can weld the workpiece that has been fixed. The housing 1 is used to provide stable support for the welding unit 2 and the fixing unit 3, so as to avoid shaking during the operation, which would seriously affect the welding quality or the positioning and fixing.

[0022] The equipment housing 1 includes a workbench 101. An emergency stop button 103 is provided on the outer surface of the workbench 101. A cooling fan 102 is provided above the workbench 101, and the cooling fan 102 can cool and dissipate heat on the welding surface of the welded parts. The emergency stop button 103 is used to stop welding and fix the work in an emergency. A hydraulic push rod 203 is provided inside the workbench 101. A mounting plate 204 is slidably provided at the output end of the hydraulic push rod 203. The output end of the hydraulic push rod 203 passes through the mounting plate 204 and is connected to the welding unit 2. The welding unit 2 and the hydraulic push rod 203 are inclined. The hydraulic push rod 203 can drive the welding unit 2 to move in the extension or retraction direction to adjust the working height of the welding unit 2. An operation button 104 is provided above the emergency stop button 103 on the workbench 101, and the operation button 104 is used to control the welding unit 2 and the fixing unit 3 to work.

[0023] Welding unit 2 includes laser welding equipment 201, which is located above mounting plate 204 and is rotatably connected to the surface of mounting plate 204. A rotary motor 202 is provided on the top of laser welding equipment 201, which can drive laser welding equipment 201 to rotate along the top of mounting plate 204 to meet the welding work of welding parts with multiple angles. A welding head is provided on one side of laser welding equipment 201, which is used to perform welding work on the surface of the workpiece to be welded.

[0024] The fixing unit 3 includes a longitudinal magnetic rail. An electromagnetic slider 303 adapted to the longitudinal magnetic rail is slidably mounted on its outer surface. The electromagnetic slider 303 can slide on the outer surface of the longitudinal slide rail 301. A support plate 302 is mounted on the top of the electromagnetic slider 303. A linear drive device 304 is mounted on one side of the support plate 302. The output end of the linear drive device 304 passes through the support plate 302, and a sliding block 307 is mounted on the output end of the linear drive device 304. The bottom of the sliding block 307 is slidably connected to the upper part of the support plate 302, and the top of the sliding block 307... The part is provided with a fixing ring 306, which is used to clamp and fix the surface of the workpiece to be welded. The linear drive device 304 can drive the sliding block 307 to move horizontally along the outer surface of the support plate 302. When the longitudinal slide rail 301, electromagnetic slider 303, linear drive device 304 and sliding block 307 cooperate with each other, they can drive the fixing ring 306 to move in multiple axes and fix the outer side of the workpiece to be welded. There are multiple fixing units 3, and each fixing unit 3 is symmetrically distributed on the top of the worktable 101.

[0025] A micro motor is provided between the fixed ring 306 and the sliding plate. The output end of the micro motor is connected to the bottom of the fixed ring 306, and the fixed ring 306 driven by the micro motor rotates above the sliding block 307. A linear double-end drive device 309 is provided at the bottom of the fixed ring 306. The linear double-end drive device 309 is a dual-output type, and the output end of the linear double-end drive device 309 is provided with a connecting rod 310. The end of the connecting rod 310 away from the linear double-end drive device is connected to one side of the fixed ring 306. The fixed ring 306 has an open-loop design structure. The linear double-end drive device 309 can adjust the opening size of the fixed ring 306 by using the cooperation of multiple connecting rods 310, thereby adapting to workpieces of different diameters to be welded.

[0026] A drive rod 311 is provided inside the fixed ring 306. The drive rod 311 is slidably disposed inside the fixed ring 306. A fixing plate 308 and an adjusting plate 313 are respectively provided at the left and right ends of the drive rod 311. The adjusting plate 313 is located on the outer side of the fixed ring 306, while the fixing plate 308 is located on the inner side. A compression spring is provided between the drive rod 311 and the adjusting plate 313. A pressure regulating chamber 305 is provided outside the fixing plate 308. A dividing plate is provided inside the pressure regulating chamber 305. The pressure regulating chamber 305 contains liquid, which can be coolant, water, or hydraulic oil. The adjusting plate 313 is in close contact with the interior of the pressure regulating chamber 305 and, together with the dividing plate, forms an independent piston chamber. The pressure regulating chamber 305 has a conveying pipe 312 connected to one side. The conveying pipe 312 has a certain degree of flexibility to avoid the risk of the conveying pipe 312 breaking during the process of adjusting the opening size of the fixed ring using the linear double-end drive device 309. An electric pump is provided on the outside of the end of the conveying pipe 312 near the pressure regulating chamber 305. When the fixed plate 308 is under pressure, the drive rod 311 slides inside the fixed ring 306, and the adjusting plate 313 moves away from the fixed ring 306. The internal hydraulic pressure of the pressure regulating chamber 305 is in a rising state. When the fixed plate 308 is not under pressure, the compression spring is in a neutral state, and the adjusting plate 313 is in close contact with the outer surface of the fixed ring 306.

[0027] The number of fixing plates 308, drive rods 311, adjusting plates 313, dividing plates, and compression springs is set in multiples, and each fixing plate 308, drive rod 311, adjusting plate 313, and compression spring is mirrored on the left and right sides of the fixing ring 306. The number of pressure regulating chambers 305 is at least two, and the two pressure regulating chambers 305 are symmetrically arranged on the left and right sides of the fixing ring 306. The two pressure regulating chambers 305 are interconnected by conveying pipes 312. The dividing plates in the pressure regulating chambers 305 can divide the space inside the pressure regulating chambers 305 into multiple independent chambers. The number of conveying pipes 312 is set in multiples, and each conveying pipe is interconnected with the formed independent chamber. Each fixing plate 308 is equipped with a pressure sensor, which can detect the pressure data generated by the contact between the fixing plate 308 and the welded part in real time.

[0028] In use, the operator first places the workpiece to be welded (such as a tricycle frame pipe) into the equipment's working area. The control system activates the fixing unit 3, controlling the sliding of the electromagnetic slider 303 on the longitudinal magnetic track and the linear drive device 304 to push the sliding block 307 to slide horizontally on the support plate 302, moving the fixing ring 306 to the part of the workpiece that needs to be clamped. Subsequently, the linear double-end drive device 309 is in an extended state, and simultaneously adjusts the distance between the left and right sides of the fixing ring 306 through the connecting rod 310, thereby adjusting the opening size of the fixing ring 306 (open-ring design), so that it initially clamps the workpiece from the outside, adapting to different... For workpieces of a certain diameter, once the workpiece is stably fixed, welding unit 2 begins to work. Using the action of hydraulic push rod 203, the mounting plate 204 and the entire welding unit 2 on it are pushed up or down, adjusting the welding head to a suitable working height. Then, the rotary motor 202 is started, driving the laser welding equipment 201 to rotate on the surface of the mounting plate 204, thereby changing the irradiation angle of the welding head to adapt to welds at different angles on the workpiece. After this positioning is completed, the laser welding equipment 201 is started, and a high-energy laser beam is emitted from the welding head, precisely melting the material at the workpiece to be welded, achieving precise and efficient welding.

[0029] Finally, after welding is completed, welding unit 2 stops working and resets, fixing unit 3 releases its clamp (linear double-end drive device 309 is released, and compression spring pushes fixing plate 308 back to its original position), and the operator can then take out the welded workpiece.

[0030] During the welding process, due to laser thermal shock or equipment vibration, the workpiece exhibits a slight tendency to shift to the right. At this time, the workpiece exerts additional pressure on the fixing plate 308 on the right side of the fixing ring 306. This increased pressure on the right side pushes the fixing plate 308 and the drive rod 311 to slide outwards from the fixing ring 306. The drive rod 311 pushes the adjusting plate 313, compressing the compression spring and simultaneously squeezing the liquid in the right-side pressure regulating chamber 305, causing a sudden increase in hydraulic pressure within this independent chamber. Since the pressure regulating chambers 305 on the left and right sides of the fixing ring 306 are interconnected via the delivery pipe 312, the increased high-pressure liquid in the right-side chamber will immediately... The liquid flows through the pipe to the left pressure regulating chamber 305, where the pressure is relatively low. The pressure in the left pressure regulating chamber 305 increases due to the inflow of liquid. This pressure pushes the left regulating plate 313 to move into the fixed ring 306. The regulating plate 313 transmits the force to the left fixed plate 308 through the drive rod 311, driving the left fixed plate 308 to actively press against the workpiece (to the right). At the same time, the electromagnetic slider 303 slides on the outside of the longitudinal slide rail 301, and the linear drive device 304 controls the sliding block 307 to move horizontally on the surface of the support plate 302. At the same time, the rotary motor 202 is started to drive the fixed ring 306 to rotate.

[0031] In addition, at least four fixing units 3 are provided, which are installed in pairs on the two longitudinal slide rails 301 located on the left and right sides of the worktable 101. In this way, the workpiece to be welded is clamped at least four points (two at the front and two at the back) to form a stable fixation. Two fixing units 3 are regarded as a cooperative group. When welding causes the workpiece to shift, the pressure sensor data on the two fixing rings 306 on the same side will show a consistent trend. Based on this, the system judges that the workpiece has shifted as a whole, rather than a local disturbance. Taking the welding of long shaft-type workpieces (such as the frame beam of a tricycle) as an example, where welding thermal stress causes the workpiece to bend and shift to the right: The workpiece bends to the right, causing greater deformation and displacement on its right side (the end furthest from the welding point) than on its left side (the end closest to the welding point). At this point, the pressure sensor reading on the right rear retaining ring 306 will show a significant anomaly first (e.g., a continuous increase in pressure), followed by a change in the reading on the right front retaining ring 306. By comparing the data from the two nodes on the same side, the system can diagnose that the workpiece shift is systemic, and that the shift increases from the welding point towards the far end. The adjustment steps are as follows: First, the right rear fixing unit 3, which has the most severe offset, is commanded to move. Its electromagnetic slider 303 slides along the longitudinal slide rail 301, and the linear drive device 304 pushes the sliding block 307 to move horizontally. At the same time, the micro motor rotates the fixing ring 306. These three actions are carried out in coordination, moving the fixing ring 306 to a new position to "straighten" the far end of the workpiece. This adjustment range is the largest. Subsequently, the right front fixing unit 3 will also make similar adjustments, but the range of movement and rotation will be smaller than that of the rear unit. Its function is to smooth the transition and prevent new stress concentration in the middle part of the workpiece. While the right unit moves, the left fixing unit 3 will also make minor adaptive adjustments to maintain the overall symmetrical constraint and avoid over-constraint. In this way, while adjusting the new fixing point, the already deformed weldment can be straightened to avoid thermal deformation and excessive offset after welding, which would lead to a decrease in the subsequent welding quality.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A welding device for producing an electrically motorized tricycle, comprising a device housing (1), a welding unit (2) and a holding unit (3), the welding unit (2) and the holding unit (3) being located inside the device housing (1), and the holding unit (3) being capable of positioning and holding a workpiece to be welded, characterized in that: The welding unit (2) comprises a laser welding device (201), the laser welding device (201) is located above the mounting plate (204), and the laser welding device (201) is rotationally connected with the surface of the mounting plate (204); The fixing unit (3) comprises a longitudinal magnetic rail, an outer side surface of the longitudinal magnetic rail is slidably provided with an electromagnetic slider (303) matched with the outer side surface, the electromagnetic slider (303) can slide on the outer side surface of the longitudinal sliding rail (301), a top of the electromagnetic slider (303) is provided with a supporting plate (302), an inner side of the supporting plate (302) is provided with a sliding block (307), and the supporting plate (302) is provided with a fixing ring (306) through the sliding block (307); the fixing ring (306) can fixedly clamp the outer side of the workpiece to be welded; An inner side of the fixing ring (306) is provided with a driving rod (311), the driving rod (311) is slidably arranged in the inner side of the fixing ring (306), left and right ends of the driving rod (311) are respectively provided with a fixing sheet (308) and an adjusting plate (313), the adjusting plate (313) is located at an outer side region of the fixing ring (306), the fixing sheet (308) is located at an inner diameter of the fixing ring (306), a compression spring is arranged between the driving rod (311) and the adjusting plate (313), and an outer side of the fixing sheet (308) is provided with a pressure adjusting chamber (305).

2. The welding apparatus for producing an electrically motorized tricycle according to claim 1, characterized in that: The equipment shell (1) comprises a workbench (101), an outer side surface of the workbench (101) is provided with an emergency stop button (103), the emergency stop button (103) is used for stopping welding and fixing work in an emergency state, an inner side of the workbench (101) is provided with a hydraulic push rod (203), and an output end of the hydraulic push rod (203) is slidably provided with a mounting plate (204); The output end of the hydraulic push rod (203) penetrates through the mounting plate (204) and is connected with the welding unit (2), the welding unit (2) and the hydraulic push rod (203) are arranged in an inclined mode, the hydraulic push rod (203) can drive the welding unit (2) to move in an extension or contraction direction, the working height of the welding unit (2) is adjusted, the workbench (101) is provided with an operation button (104) above the emergency stop button (103), and the operation button (104) is used for controlling the welding unit (2) and the fixing unit (3) to work.

3. The welding apparatus for producing an electrically motorized tricycle according to claim 1, characterized in that: The welding unit (2) comprises a laser welding device (201), the laser welding device (201) is located above the mounting plate (204), and the laser welding device (201) is rotationally connected with the surface of the mounting plate (204), the laser welding device (201) is provided with a rotating motor (202) at the top, the rotating motor (202) can drive the laser welding device (201) to rotate above the mounting plate (204), so as to meet the welding work of a welding piece in a multi-region angle, and one side of the laser welding device (201) is provided with a welding head, the welding head is used for surface welding work on the workpiece to be welded.

4. The welding apparatus for producing an electrically motorized tricycle according to claim 1, characterized in that: One side of the support plate (302) is provided with a linear drive device (304), the output end of the linear drive device (304) penetrates the support plate (302), the output end of the linear drive device (304) is fixedly connected with one side of the sliding block (307), and the linear drive device (304) can drive the sliding block (307) to slide horizontally along the support plate (302); The longitudinal slide rail (301), the electromagnetic slide block (303), the linear drive device (304) and the sliding block (307) cooperate to drive the fixed ring (306) to move in multiple axial directions and fix the outer side of the workpiece to be welded.

5. The welding apparatus for producing an electrically motorized tricycle according to claim 4, characterized in that: A micro motor is arranged between the fixed ring (306) and the sliding plate, the output end of the micro motor is connected with the bottom of the fixed ring (306), the micro motor can drive the fixed ring (306) to rotate above the sliding block (307), and the bottom of the fixed ring (306) is provided with a linear double-end drive device (309); The output end of the linear double-end drive device (309) is provided with a connecting rod (310), one end of the connecting rod (310) away from the linear double-end drive device (309) is connected with one side of the fixed ring (306), the fixed ring (306) is designed as an open ring structure, and the linear double-end drive device (309) can adjust the opening size of the fixed ring (306) by using multiple connecting rods (310).

6. The welding apparatus for production of an electrically motorized tricycle according to claim 1, characterized in that: The inside of the pressure adjusting chamber (305) is provided with a partition plate, the inside of the pressure adjusting chamber (305) contains liquid, the adjusting plate (313) is in close contact with the inside of the pressure adjusting chamber (305), and the partition plate forms an independent piston chamber, one side of the pressure adjusting chamber (305) is connected with a conveying pipeline (312), and the outside of one end of the conveying pipeline (312) close to the pressure adjusting chamber (305) is provided with an electric pump.

7. The welding apparatus for producing an electrically motorized tricycle according to claim 5, characterized in that: The number of the fixed pieces (308), the drive rods (311), the adjusting plates (313), the partition plates and the compression springs is multiple, and each of the fixed pieces (308), the drive rods (311), the adjusting plates (313) and the compression springs is mirror arranged on the left and right sides of the fixed ring (306), and the number of the pressure adjusting chambers (305) is at least two, and the two pressure adjusting chambers (305) are symmetrically arranged on the left and right sides of the fixed ring (306).

8. The welding apparatus for producing an electrically motorized tricycle according to claim 6, characterized in that: When the fixed piece (308) is in a stressed state, the drive rod (311) slides in the fixed ring (306), the adjusting plate (313) moves away from one side of the fixed ring (306), and the internal hydraulic pressure of the pressure adjusting chamber (305) is in a raised state, when the fixed piece (308) is not in a stressed state, the compression spring is in a neutral state, and the adjusting plate (313) is tightly attached to the outer surface of the fixed ring (306).

9. The welding apparatus for producing an electrically motorized tricycle according to claim 7, characterized in that: Two said pressure regulating chambers (305) are connected with each other by a conveying pipe (312), a partition plate in the pressure regulating chamber (305) can divide the space in the pressure regulating chamber (305) into multiple independent chambers, the number of the conveying pipes (312) is set to be multiple, and each conveying pipe is connected with the independent chambers, and a pressure sensor is arranged on each said fixed sheet (308), which can detect the pressure data generated by the contact between the fixed sheet (308) and the welding piece in real time.

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