A wire welding device for motor stator

Abstract

This invention relates to the field of welding equipment technology, specifically to a wire end welding device for motor stators, comprising a frame, a forming section, and a welding section. A copper strip is mounted on the frame. The forming section includes a support plate, a first forming component, a second forming component, and a third forming component. The first, second, and third forming components are all mounted on the support plate. This motor stator wire end welding device of the present invention, by setting the forming section and welding section on the frame, allows the copper strip to be bent using the first, second, and third forming components before welding, forming G-shaped copper terminals. The welding section then welds the copper terminals to the wire end. For wire ends of different thicknesses, the lengths of the first and third sections of the copper strip are changed by driving the support plate up and down, improving the tightness of the connection between the formed copper terminal and the wire end, thus contributing to improved welding quality.

Description

Technical Field

[0001] This invention relates to the field of welding equipment technology, and specifically to a welding device for wire ends of an electric motor stator. Background Technology

[0002] As a crucial component of an electric motor, the welding quality of the stator leads directly determines the motor's performance and reliability. During motor manufacturing, the winding coils need to be connected to the leads, i.e., the stator leads need to be connected, in order to achieve functions such as transmitting electrical energy, generating a magnetic field, and driving the motor.

[0003] In existing technologies, the wire ends of motor stators are mainly connected by welding. The main welding process is as follows: ① The machine automatically forms copper strip into G-type open terminals and delivers the terminals to the welding point; ② The enameled wire and lead wire are inserted into the terminal; ③ Pressure welding discharge is applied, and the wire ends are cut off. This process fuses adjacent metal surfaces, heats the copper terminals with current between electrodes, causing the enameled wire coating to vaporize, and uses the pressure of the electrodes on the support to press them together, forming a fusion between metal molecular layers. Compared to terminal crimping where adjacent copper wires remain independent metal units, this process results in a tighter connection, effectively improving the durability of the motor. However, in this process, while the G-type open terminals are usually of uniform size, the wire ends vary in thickness. When connecting the wire ends to the terminals, the tightness of the connection cannot be guaranteed, potentially leading to displacement and insufficient fusion area during subsequent welding, which negatively impacts the welding quality. Summary of the Invention

[0004] This invention provides a wire end welding device for motor stators to solve the problem that existing welding equipment cannot guarantee the tightness of the connection between the terminal and the wire end due to the different thicknesses of the wire ends, thus affecting the welding quality.

[0005] The present invention provides a stator wire welding device for a motor, comprising a frame, a forming section, and a welding section; both the forming section and the welding section are mounted on the frame; a copper strip is provided on the frame, the copper strip being movable from the forming section to the welding section, the direction in which the copper strip moves from the forming section to the welding section being referred to as the first direction, which is a horizontal direction; the forming section includes a support plate, a first forming component, a second forming component, and a third forming component; the support plate is movably mounted on the frame; the first forming component, the second forming component, and the third forming component are all mounted on the support plate; in its natural state, the copper strip is a rectangular plate structure; the copper strip includes components along the vertical direction... The copper strip consists of a first segment, a second segment, and a third segment, which are sequentially and fixedly connected. The first forming component allows the upper and lower ends of the first segment to approach each other vertically and form an arc-shaped structure. The second forming component allows the second segment to bend upward relative to the first segment. The third forming component allows the third segment to bend relative to the second segment towards the side of the first segment along a second direction. The second direction is horizontal and perpendicular to the first direction, and the bent copper strip has a G-shaped structure. The support plate can move up and down to lengthen the first segment and shorten the third segment, or vice versa. The welding part is used to weld the copper strip bent into a G-shaped structure to the wire end.

[0006] Furthermore, the first molded part includes a fixed mold and a moving mold; the fixed mold is fixedly installed on the support plate, the moving mold is slidably installed on the support plate, the moving mold can move along the second direction toward the side closer to the fixed mold and close with the fixed mold, and an arc-shaped mold cavity is defined between the fixed mold and the moving mold after the mold is closed.

[0007] Furthermore, a limit plate is provided on the support plate, and a limit rod is provided on the moving mold. The limit rod is arranged along the second direction and slides in cooperation with the limit plate.

[0008] Furthermore, the second molding part includes an ejector block, which is mounted on the moving mold via a first elastic member. The first elastic member always has a tendency to cause the ejector block to move upward. In the initial state, the upper end of the ejector block is higher than the lower end of the fixed mold, and before the moving mold and the fixed mold are closed, the ejector block is located between the fixed mold and the moving mold. After the moving mold and the fixed mold are closed, the fixed mold is located between the ejector block and the moving mold, and at this time the ejector block can cause the second section of the copper strip to bend relative to the first section of the copper strip.

[0009] Furthermore, the third molding component includes a push plate, a top block, and a moving mold arranged sequentially in the second direction, with the top block located between the push plate and the moving mold, and the push plate being able to move along the second direction.

[0010] Furthermore, a pressure plate is provided on the moving mold, and the pressure plate slides with the moving mold. The pressure plate and the moving mold are arranged side by side in the first direction. In the initial state, the distance from the pressure plate to the fixed mold in the second direction is less than the distance from the moving mold to the fixed mold in the second direction. The movement of the moving mold towards the side closer to the fixed mold in the second direction has a first stroke and a second stroke. In the first stroke, the moving mold and the pressure plate move synchronously. In the second stroke, the moving mold moves relative to the pressure plate.

[0011] Furthermore, the moving mold is connected to the pressure plate via a second elastic element, which is arranged along a second direction.

[0012] Furthermore, a conveying section is provided on the frame, which is located on the side of the first forming part away from the welding part in the first direction. The conveying section is capable of feeding the copper strip into the first forming part of the forming part.

[0013] Furthermore, the conveying unit includes two conveying rollers arranged side by side in the second direction and defining a clamping channel for clamping the copper strip. Both conveying rollers are arranged in the vertical direction and can rotate about their own axes respectively.

[0014] Furthermore, a drum is also provided on the support platform, and a copper strip is wound on the drum; the drum is located on the side of the conveying section away from the first molded part in the first direction.

[0015] The beneficial effects of this invention are as follows: The stator wire welding equipment of this invention, by setting a forming part and a welding part on a frame, allows copper strips to pass through the forming part before welding. The copper strips are then bent using a first forming part, a second forming part, and a third forming part, forming a G-shaped copper terminal after three bends. The welding part then welds the copper terminal to the wire end. Furthermore, for wire ends of different thicknesses, the lengths of the first and third sections of the copper strip are changed by moving the drive support plate up and down. For thicker wire ends, the first section of the copper strip is lengthened, the second section remains unchanged, and the third section is shortened, increasing the area of ​​space left after the copper terminal and wire end are crimped. For thinner wire ends, the first section of the copper strip is shortened, the second section remains unchanged, and the third section is lengthened, reducing the area of ​​space left after the copper terminal and wire end are crimped, improving the tightness of the connection between the formed copper terminal and the wire end, and contributing to improved welding quality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1This is a schematic diagram of the overall structure of an embodiment of a wire-end welding device for an electric motor stator according to the present invention;

[0018] Figure 2 This is a front view of the overall structure of an embodiment of a wire-end welding device for an electric motor stator according to the present invention;

[0019] Figure 3 for Figure 2 Sectional view at point AA along the middle;

[0020] Figure 4 This is a schematic diagram of a partial structure of an embodiment of a wire-end welding device for a motor stator according to the present invention;

[0021] Figure 5 This is a front view of a partial structure of an embodiment of a wire-end welding device for an electric motor stator according to the present invention;

[0022] Figure 6 for Figure 5 Cross-sectional view at the middle edge BB;

[0023] Figure 7 This is a schematic diagram of the forming section of an embodiment of a wire end welding device for an electric motor stator according to the present invention;

[0024] Figure 8 This is an exploded view of the forming section of an embodiment of a wire end welding device for an electric motor stator according to the present invention;

[0025] Figure 9 This is a schematic diagram of the copper strip after bending, according to an embodiment of the wire welding equipment for motor stator of the present invention;

[0026] Figure 10 This is a diagram showing the welding section of a welding device for welding the wire ends of an electric motor stator according to an embodiment of the present invention, where the formed copper terminal is welded to the thick wire end.

[0027] Figure 11 This is a diagram showing the welding section of a welding device for welding wire ends of a motor stator according to an embodiment of the present invention, where the formed copper terminal is welded to the thin wire end.

[0028] In the diagram: 100, frame; 110, first drive unit; 120, conveying unit; 121, conveying roller; 130, support platform; 131, clamping plate; 132, drum; 200, forming unit; 210, support plate; 211, second drive unit; 212, limiting plate; 213, third drive unit; 220, first forming part; 221, fixed mold; 222, moving mold; 223, limiting rod; 224, pressure plate; 230, second forming part; 231, top block; 232, first elastic element; 240, third forming part; 241, push plate; 300, welding unit; 310, moving electrode; 320, fixed electrode; 400, copper strip; 401, first section; 402, second section; 403, third section; 500, wire end. Detailed Implementation

[0029] 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.

[0030] An embodiment of the present invention, namely a wire end welding device for an electric motor stator, is as follows: Figures 1 to 11 As shown.

[0031] A stator wire welding device for an electric motor includes a frame 100, a forming section 200, and a welding section 300. Both the forming section 200 and the welding section 300 are mounted on the frame 100. A copper strip 400 is provided on the frame 100. The copper strip 400 is movable from the forming section 200 to the welding section 300; the direction in which the copper strip 400 moves from the forming section 200 to the welding section 300 is called a first direction, which is horizontal. The forming section 200 includes a support plate 210, a first forming component 220, a second forming component 230, and a third forming component 240. The support plate 210 is movably mounted on the frame 100. The first forming component 220, the second forming component 230, and the third forming component 240 are all mounted on the support plate 210.

[0032] In its natural state, the copper strip 400 has a rectangular plate-like structure. The copper strip 400 includes a first segment 401, a second segment 402, and a third segment 403, which are arranged and fixedly connected in a vertical direction. The first forming member 220 enables the upper and lower ends of the first segment 401 of the copper strip 400 to approach each other in a vertical direction and form an arc-shaped structure. The second forming member 230 enables the second segment 402 of the copper strip 400 to bend upward relative to the first segment 401, and the third forming member 240 enables the third segment 403 of the copper strip 400 to bend relative to the second segment 402 towards the side closer to the first segment 401 of the copper strip 400 along a second direction. The second direction is horizontal and perpendicular to the first direction, and the copper strip 400 after being bent by the first forming member 220, the second forming member 230, and the third forming member 240 forms a G-shaped structure. The support plate 210 can move up and down to lengthen the first segment 401 of the copper strip 400 and shorten the third segment 403, or vice versa. The welding part 300 is used to weld the copper strip 400, which is bent into a G-shaped structure, to the wire end 500.

[0033] The welding section 300 employs resistance welding, a technique known in the prior art. The welding section 300 includes a movable electrode 310 and a fixed electrode 320. The movable electrode 310 and the fixed electrode 320 are arranged sequentially in the vertical direction, with the movable electrode 310 positioned above the fixed electrode 320. The movable electrode 310 is capable of moving downwards and abutting against the fixed electrode 320.

[0034] In use, the copper strip 400, bent into a G-shape, is first placed on the fixed electrode 320. Then, the wire end 500 is clipped into the copper strip 400. Next, the moving electrode 310 is moved down for pre-pressing. After that, the power is turned on. The resistance heat generated by the current passing between the moving electrode 310 and the fixed electrode 320 generates heat at the connection between the copper strip 400 and the wire end 500, and locally heats it to the point of melting, eventually forming a whole.

[0035] Specifically, a first driving component 110 is provided on the frame 100, which is used to drive the support plate 210 to move up and down. The first driving component 110 is a hydraulic telescopic cylinder.

[0036] By providing a forming section 200 and a welding section 300 on the frame 100, during welding, the copper strip 400 first passes through the forming section 200. When the copper strip 400 passes through the forming section 200, the first forming member 220, the second forming member 230 and the third forming member 240 will bend the copper strip 400 respectively, and after three bends, the copper strip 400 forms a G-shaped structure.

[0037] See Figure 6As shown, the copper strip 400 is bent by the first forming member 220 and the second forming member 230. The first segment 401 of the copper strip 400, after being bent by the first forming member 220, forms an arc-shaped structure. The second segment 402 of the copper strip 400, after being bent by the second forming member 230, bends upwards relative to the first segment 401. (See also...) Figure 9 As shown, the copper strip 400 is bent by the third forming part 240 to finally form a G-shaped structure. That is, the copper strip 400 is now processed into a copper terminal, and then the welding part 300 is used to weld the copper terminal to the wire end 500. After welding, the copper terminal and the wire end 500 will be flattened, see attached diagram. Figure 10 and Figure 11 As shown.

[0038] For wire ends 500 of varying thicknesses, the support plate 210 can be moved up and down to change the lengths of the first segment 401 and the third segment 403 of the copper strip 400. With a fixed total length of copper strip 400, when the first segment 401 becomes longer and the second segment 402 remains unchanged, the third segment 403 becomes shorter. Conversely, when the first segment 401 becomes shorter and the second segment 402 remains unchanged, the third segment 403 becomes longer. (See also...) Figure 10 As shown, for a thicker wire end 500, the first segment 401 of the copper strip 400 is lengthened, the second segment 402 remains unchanged, and the third segment 403 is shortened, increasing the area of ​​the space left after the copper terminal and the wire end 500 are crimped together. That is, the area covering the wire end 500. For a thinner wire end 500, the first segment 401 of the copper strip 400 is shortened, the second segment 402 remains unchanged, and the third segment 403 is lengthened, decreasing the area of ​​the space left after the copper terminal and the wire end 500 are crimped together. The lengths of the first segment 401 and the third segment 403 of the copper strip 400 are adjusted according to the thickness of the wire end 500 during forming, improving the tightness of the connection between the formed copper terminal and the wire end 500, and facilitating subsequent soldering.

[0039] In a further embodiment, the first molded part 220 includes a fixed mold 221 and a movable mold 222. The fixed mold 221 is fixedly mounted on the support plate 210, and the movable mold 222 is slidably mounted on the support plate 210. The movable mold 222 can move along a second direction toward the side closer to the fixed mold 221 and close with the fixed mold 221, and an arc-shaped mold cavity is defined between the fixed mold 221 and the movable mold 222 after the mold is closed.

[0040] The support plate 210 is fixedly provided with a second driving component 211, and the moving mold 222 is fixedly installed at the output end of the second driving component 211. The second driving component 211 is a hydraulic telescopic cylinder.

[0041] By setting the fixed mold 221 and the moving mold 222 to cooperate, when in use, the copper strip 400 is fed between the fixed mold 221 and the moving mold 222, and a margin is left at the lower end to facilitate the forming of the second section 402 and the third section 403. Then, the second driving component 211 is activated, and the moving mold 222 is driven to move along the second direction towards the side closer to the fixed mold 221 until it closes with the fixed mold 221. After the fixed mold 221 and the moving mold 222 close, the forming of the first section 401 of the copper strip 400 is completed.

[0042] Furthermore, a limit plate 212 is fixedly installed on the support plate 210, and a limit rod 223 is installed on the moving mold 222. The limit rod 223 is arranged along the second direction and slides in cooperation with the limit plate 212. By setting the limit plate 212 and the limit rod 223 to slide in cooperation, the movement of the moving mold 222 is limited.

[0043] In a further embodiment, the second molded part 230 includes a top block 231, which is mounted on the moving mold 222 via a first elastic member 232. The first elastic member 232 always has a tendency to cause the top block 231 to move upward. The first elastic member 232 is arranged vertically and is a spring. In the initial state, the upper end of the top block 231 is higher than the lower end of the fixed mold 221. That is, in the initial state, the distance from the upper end of the top block 231 to the support plate 210 in the vertical direction is greater than the distance from the lower end of the fixed mold 221 to the support plate 210 in the vertical direction. Before the moving mold 222 and the fixed mold 221 are closed, the top block 231 is located between the fixed mold 221 and the moving mold 222. After the moving mold 222 and the fixed mold 221 are closed, the fixed mold 221 is located between the top block 231 and the moving mold 222. At this time, the top block 231 can cause the second segment 402 of the copper strip 400 to bend relative to the first segment 401 of the copper strip 400.

[0044] By setting an ejector block 231 and installing it on the moving mold 222, before the moving mold 222 and the fixed mold 221 are closed, both the ejector block 231 and the moving mold 222 are positioned away from the fixed mold 221 in the second direction. At this time, the ejector block 231 is located between the fixed mold 221 and the moving mold 222. When the moving mold 222 moves towards the fixed mold 221 in the second direction and closes with the fixed mold 221, the distance from the upper end of the ejector block 231 to the support plate 210 in the vertical direction is greater than the distance from the lower end of the fixed mold 221 to the support plate 210 in the vertical direction in the initial state. Therefore, during the movement of the moving mold 222 driving the ejector block 231, the ejector block 231 will slide along the lower surface of the copper strip 400 when passing the fixed mold 221, and extend upward after passing the fixed mold 221, pushing the second section 402 of the copper strip 400 upward, causing the second section 402 of the copper strip 400 to bend relative to the first section 401 of the copper strip 400, thus completing the forming of the second section 402 of the copper strip 400. The forming of the second section 402 of the copper strip 400 is completed almost simultaneously with the forming of the first section 401 of the copper strip 400, resulting in a simple structure and convenient operation. Furthermore, after the moving mold 222 and the fixed mold 221 are closed, the fixed mold 221 is located between the ejector block 231 and the moving mold 222.

[0045] In another possible embodiment, one end of the moving mold 222 away from the welding portion 300 along the first direction is blade-shaped.

[0046] In use, a portion of the copper strip 400 is fed between the fixed mold 221 and the moving mold 222. During the process of the moving mold 222 and the fixed mold 221 closing and bending the first section 401 of the copper strip 400, the moving mold 222 also uses its blade-like structure to cut the copper strip 400. It should be noted that, because the copper strip 400 has a certain thickness, after the mold is closed, the copper strip 400 to be formed and the already formed copper strip 400 are still partially connected. However, the connected part can assist the already formed copper strip 400 in entering the welding section 300 and will be separated during the subsequent welding process, without affecting the normal progress of the welding.

[0047] Alternatively, the copper strip 400 can be cut and separated manually using auxiliary tools.

[0048] In a further embodiment, the third forming part 240 includes a push plate 241, a top block 231 and a moving mold 222 arranged sequentially in the second direction, and the top block 231 is located between the push plate 241 and the moving mold 222. The push plate 241 can move along the second direction, so that the third segment 403 of the copper strip 400 is bent relative to the second segment 402 in the second direction toward the side close to the first segment 401 of the copper strip 400.

[0049] Among them, the push plate 241 is mounted on the support plate 210 through the third drive component 213, and the push plate 241 is fixedly mounted on the output end of the third drive component 213, which is a hydraulic telescopic cylinder.

[0050] By setting the push plate 241, after the moving mold 222 and the fixed mold 221 are closed, the third driving component 213 is activated to drive the push plate 241 to move towards the side closer to the third section 403 of the copper strip 400, so that the third section 403 of the copper strip 400 is bent relative to the second section 402 of the copper strip 400.

[0051] In a further embodiment, a pressure plate 224 is provided on the moving mold 222. The pressure plate 224 is slidably engaged with the moving mold 222. The pressure plate 224 and the moving mold 222 are arranged side by side in the first direction, and the pressure plate 224 is located on the side of the moving mold 222 away from the welding part 300 in the first direction.

[0052] In the initial state, the distance from the pressure plate 224 to the fixed mold 221 along the second direction is less than the distance from the moving mold 222 to the fixed mold 221 along the second direction. The movement of the moving mold 222 towards the side closer to the fixed mold 221 along the second direction has a first stroke and a second stroke. In the first stroke, the moving mold 222 moves synchronously with the pressure plate 224. In the second stroke, the moving mold 222 moves relative to the pressure plate 224.

[0053] The moving mold 222 is connected to the pressure plate 224 via a second elastic element, which is arranged along a second direction and is a spring. The pressure plate 224 is slidably engaged with the moving mold 222 via a sliding rod.

[0054] By setting a pressure plate 224, and ensuring that the initial distance of the pressure plate 224 along the second direction to the fixed mold 221 is less than the distance of the moving mold 222 along the second direction to the fixed mold 221, the pressure plate 224 is located between the fixed mold 221 and the moving mold 222. During the process of the moving mold 222 moving closer to the fixed mold 221 to close with it, in the first stroke of the moving mold 222's movement, the moving mold 222 will push the pressure plate 224 to move synchronously through the second elastic element until the pressure plate 224 abuts against the copper strip 400. At this time, the pressure plate 224 can first limit the copper strip 400, improving the stability of the copper strip 400. Then, the moving mold 222 moves to the second stroke, and the moving mold 222 moves relative to the pressure plate 224, compressing the second elastic element, until the moving mold 222 closes with the fixed mold 221.

[0055] In a further embodiment, a conveying section 120 is provided on the frame 100. The conveying section 120 is located on the side of the first molding part 220 away from the welding part 300 in the first direction. The conveying section 120 can feed the copper strip 400 into the first molding part 220 of the molding part 200, so that the copper strip 400 fits with the fixed mold 221 of the first molding part 220.

[0056] Automatic feeding of copper strip 400 is achieved by setting up conveyor unit 120.

[0057] The conveying unit 120 includes two conveying rollers 121, which are arranged side by side in the second direction and define a clamping channel for clamping the copper strip 400. Both conveying rollers 121 are arranged in the vertical direction and can rotate around their own axes respectively.

[0058] Specifically, the conveying unit 120 is mounted on the frame 100 via a support platform 130. A first motor is provided on the support platform 130. One of the conveying rollers 121 is fixedly mounted on the output end of the first motor, and a first gear is coaxially and fixedly connected to the conveying roller 121. A second gear is coaxially and fixedly connected to the other conveying roller 121, and the first gear meshes with the second gear.

[0059] Furthermore, two clamping plates 131 are fixedly installed on the support platform 130. The two clamping plates 131 are arranged side by side in the second direction and are located between the conveyor roller 121 and the first forming part 220. A limiting channel is defined between the two clamping plates 131. The limiting channel and the clamping channel are on the same horizontal axis, and the copper strip 400 can enter the limiting channel through the clamping channel.

[0060] By setting the clamp 131, the movement of the copper strip 400 is limited, thereby improving the accuracy of the copper strip 400 conveying.

[0061] Furthermore, a drum 132 is also provided on the support platform 130, and the copper strip 400 is wound on the drum 132. The drum 132 is located on the side of the conveyor roller 121 away from the first forming part 220 in the first direction.

[0062] Based on the above embodiments, the specific working process is as follows:

[0063] During welding, the copper strip 400 is pulled from the spool 132 and passes through the clamping channel and the limiting channel in sequence, finally resting on the fixed mold 221. The copper strip 400 is positioned between the fixed mold 221 and the moving mold 222, with a margin left at the lower end to facilitate the forming of the second section 402 and the third section 403. Then, the second drive unit 211 is activated, driving the moving mold 222 to move along the second direction towards the side closer to the fixed mold 221. During the first stroke of the moving mold 222, the moving mold 222 pushes the pressure plate 224 to move synchronously through the second elastic member until the pressure plate 224 abuts against the copper strip 400. At this point, the pressure plate 224 can first limit the copper strip 400, improving its stability. Afterward, the moving mold 222 moves to the second stroke, moving relative to the pressure plate 224 and compressing the second elastic member until the moving mold 222 closes with the fixed mold 221. Furthermore, the first segment 401 of the copper strip 400, after being bent, forms an arc-shaped structure.

[0064] During the movement of the moving mold 222 and the moving block 231, the moving block 231 will slide along the lower surface of the copper strip 400 when passing the fixed mold 221, and extend upward after passing the fixed mold 221, pushing the second section 402 of the copper strip 400 upward, so that the second section 402 of the copper strip 400 bends relative to the first section 401 of the copper strip 400, thus completing the forming of the second section 402 of the copper strip 400. The second section 402 of the copper strip 400 bends upward relative to the first section 401, and the forming of the second section 402 of the copper strip 400 is completed almost simultaneously with the forming of the first section 401 of the copper strip 400.

[0065] After the moving mold 222 and the fixed mold 221 are closed, the third driving component 213 is activated to drive the push plate 241 to move towards the side close to the third section 403 of the copper strip 400, so that the third section 403 of the copper strip 400 is bent relative to the second section 402 of the copper strip 400, and finally a G-type copper terminal is formed.

[0066] Then, the copper terminal and wire end 500 are soldered together using the soldering part 300. After soldering, the copper terminal and wire end 500 will be flattened; see attached diagram. Figure 10 and Figure 11 As shown.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. 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 device for welding wire ends on a motor stator, characterized in that: It includes a frame, a forming section, and a welding section; both the forming section and the welding section are mounted on the frame; a copper strip is provided on the frame, and the copper strip can move from the forming section to the welding section. The direction in which the copper strip moves from the forming section to the welding section is called the first direction, which is a horizontal direction; the forming section includes a support plate, a first forming component, a second forming component, and a third forming component; the support plate is mounted on the frame and can move up and down; the first forming component, the second forming component, and the third forming component are all mounted on the support plate; in its natural state, the copper strip has a rectangular plate structure; the copper strip includes a first section, a second section, and a third section arranged and fixedly connected in a vertical direction; the first forming component can bring the upper and lower ends of the first section of the copper strip closer to each other in the vertical direction and form an arc structure; the second forming component can bend the second section of the copper strip upward relative to the first section; the third forming component can bend the third section of the copper strip relative to the second section towards the side closer to the first section of the copper strip in a second direction, which is a horizontal direction and perpendicular to the first direction, and the bent copper strip has a G-shaped structure; The support plate can move up and down to lengthen the first section of the copper strip and shorten the third section, or vice versa; the welding part is used to weld the copper strip bent into a G-shaped structure to the wire end; the first forming part includes a fixed mold and a moving mold; the fixed mold is fixedly installed on the support plate, and the moving mold is slidably installed on the support plate. The moving mold can move along the second direction towards the side closer to the fixed mold and close with the fixed mold, and an arc-shaped mold cavity is defined between the fixed mold and the moving mold after the mold is closed; the second forming part includes a top block, which is installed by a first elastic element. On the moving mold, the first elastic element always has the tendency to cause the ejector block to move upward; in the initial state, the upper end of the ejector block is higher than the lower end of the fixed mold, and before the moving mold and the fixed mold are closed, the ejector block is located between the fixed mold and the moving mold; after the moving mold and the fixed mold are closed, the fixed mold is located between the ejector block and the moving mold, and at this time the ejector block can cause the second section of the copper strip to bend relative to the first section of the copper strip; the third forming element includes a push plate, the push plate, the ejector block and the moving mold are arranged sequentially in the second direction, and the ejector block is located between the push plate and the moving mold, and the push plate can move along the second direction.

2. The stator wire welding equipment according to claim 1, characterized in that: A limit plate is provided on the support plate, and a limit rod is provided on the moving mold. The limit rod is set along the second direction and slides in cooperation with the limit plate.

3. The stator wire welding equipment according to claim 1, characterized in that: A pressure plate is provided on the moving mold, and the pressure plate slides with the moving mold. The pressure plate and the moving mold are arranged side by side in the first direction. In the initial state, the distance from the pressure plate to the fixed mold in the second direction is less than the distance from the moving mold to the fixed mold in the second direction. The movement of the moving mold towards the side closer to the fixed mold in the second direction has a first stroke and a second stroke. In the first stroke, the moving mold and the pressure plate move synchronously. In the second stroke, the moving mold moves relative to the pressure plate.

4. The stator wire welding equipment according to claim 3, characterized in that: The moving mold is connected to the pressure plate through a second elastic element, which is arranged along a second direction.

5. The stator wire welding equipment according to claim 1, characterized in that: The frame is equipped with a conveying section, which is located on the side of the first forming part away from the welding part in the first direction. The conveying section can feed the copper strip into the first forming part of the forming part.

6. The stator wire welding equipment according to claim 5, characterized in that: The conveying unit includes two conveying rollers arranged side by side in the second direction and defining a clamping channel for holding copper strips. Both conveying rollers are arranged in the vertical direction and can rotate about their own axes.

7. The stator wire welding equipment according to claim 5, characterized in that: A drum is also provided on the support platform, and copper strip is wound on the drum; the drum is located on the side of the conveying section away from the first molded part in the first direction.

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