A welding aid

Abstract

The application discloses a welding auxiliary tool, which comprises a base, N clamping assemblies, and a transmission mechanism, wherein the clamping assemblies are connected to the base, and each clamping assembly comprises a first block, a second block and the transmission mechanism; the first block is provided with a first guide groove penetrating through the first block and a first wall; the second block is adapted to be installed in the first guide groove and can move along the extension direction of the first guide groove, i.e. a first direction; the second block is provided with a second wall; and the first wall and the second wall are arranged perpendicularly to the extension direction of the first guide groove. The first block is pushed and the second block is pulled by the eccentric wheel body to form a forward pushing and backward pulling movement effect, the first block and the second block are simultaneously controlled to move in opposite directions by one operation, two pin line pairs are simultaneously clamped, the operation is simple and fast, and the machining efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of welding fixtures for flat wire stators, and more particularly to a welding auxiliary fixture. Background Technology

[0002] In flat-wire motors, a busbar is a conductive component, typically made of copper, that electrically connects all flat wire ends of the same phase (such as U1, U2, V1, V2, W1, W2) and leads them to an external power source, replacing the tedious manual wire binding process in traditional motors. Busbar welding is the process of reliably and efficiently connecting all phase wire ends of the flat-wire stator to the corresponding busbar using welding technology.

[0003] Currently, for common flat wire stator busbar welding, TIG welding is usually used. However, before welding, the installation of busbar welding fixtures often relies on manual operation. It requires manual clamping of the pins of the flat wire stator and the pins of the busbar. Manual operation is difficult, prone to inaccurate positioning, and wastes a lot of time, greatly affecting production efficiency. Summary of the Invention

[0004] To address the technical problems existing in the background art, the present invention proposes a welding auxiliary tooling.

[0005] This invention proposes a welding auxiliary fixture for clamping and fixing 2N first-type pins on a flat wire stator and 2N second-type pins on a busbar in a one-to-one correspondence. The flat wire stator has N groups of first-type pins, and the busbar has N groups of second-type pins. In the first-type pin groups, two first-type pins are arranged at a first interval, and in the second-type pin groups, two second-type pins are arranged at a second interval. The first interval is smaller than the second interval. The fixture includes a base and N clamping components, all connected to the base. Each clamping component specifically includes a first block, a second block, and a transmission mechanism. The first block has a first guide groove that penetrates through it and has a first wall. The second block is fitted into the first guide groove and can move along the extension direction of the first guide groove, i.e., a first direction. The two blocks have a second wall, and both the first wall and the second wall are arranged perpendicular to the extension direction of the first guide groove. When there is a one-to-one correspondence between N first-type pin groups and N second-type pin groups, with two first-type pins in the same group located between two second-type pins in the same group, N clamping components are arranged on the base according to a preset positional relationship, so that the N clamping components can simultaneously perform the following operations on a group of first-type pins and a group of second-type pins with the above positional relationship: the transmission mechanism can link the first block to move to the first preset position, causing the first wall on the first block to push one of the first-type pins in the group to press one of the second-type pins in the group, and the transmission mechanism will synchronously link the second block to move to the second preset position, causing the second wall on the second block to push another first-type pin in the group to press another second-type pin in the group.

[0006] Preferably, it further includes: a limiting plate, which is installed on the base and has a first oblong groove and a second oblong groove. The first circular protrusion is fixed to the first block and passes through the first waist-shaped slot; The second circular protrusion is fixed to the second block and passes through the second waist-shaped slot. During the process of the transmission mechanism linking the first block to move to the first preset position, the first circular protrusion gradually moves from abutting against the upstream semicircle in the first waist-shaped slot in the direction of movement of the first block to abutting against the downstream semicircle in the first waist-shaped slot. During the process of the transmission mechanism linking the second block to move to the second preset position, the second circular protrusion gradually moves from abutting against the downstream semicircle of the first block in the second waist-shaped slot to abutting against the upstream semicircle in the second waist-shaped slot.

[0007] Preferably, the transmission mechanism specifically includes: a second shaft, the axis of which is arranged perpendicular to the first direction; The first shaft has its axis arranged along a first direction. One end of the shaft is fixed to the second block in the first guide groove, and the other end movably passes through the first block and is rotatably connected to the second shaft. The operating component includes: a grip portion and a wheel portion extending from one end of the grip portion, the wheel portion being eccentrically connected to the second axle, and the wheel portion abutting against the first block; When the operating grip drives the wheel to rotate in a direction perpendicular to the first direction, the wheel will push the first block and simultaneously pull the second block, causing the first circular protrusion and the second circular protrusion to move closer or further apart. The process of the first circular protrusion and the second circular protrusion moving closer together is the process of the transmission mechanism linking the first block to move to the first preset position and simultaneously linking the second block to move to the second preset position.

[0008] Preferably, it further includes a first spring, which is coaxially sleeved on the first shaft. The first spring is located at the end of the first guide groove away from the first wall, and the two ends of the first spring abut against the second block and the end wall of the first guide groove, respectively, to apply a resistance torque to the eccentric wheel that is opposite to its rotation trend.

[0009] Preferably, the first block has a first notch perpendicular to the first direction penetrating the first block, and the first wall is the inner wall of the first notch; the second block has a through hole perpendicular to the first direction penetrating the second block, and the second wall is the inner wall of the through hole.

[0010] Preferably, a guide block is detachably installed at the bottom of the limiting plate, and a second guide groove is arranged on the guide block. The first block is adapted to be installed in the second guide groove and can move back and forth along the extension direction of the second guide groove.

[0011] Preferably, the base has a second notch, which corresponds to the welding position of the busbar on the flat wire stator; The welding auxiliary fixture also includes a positioning ring, a support block, a support plate, an elastic element, a first pushing mechanism, and a second pushing mechanism. The positioning ring is adapted to be installed on the edge surface of the second notch of the base. The first pushing mechanism pushes the positioning ring to move until it presses against one side wall of the busbar. The support block is arranged facing the positioning ring and is adapted to be installed in the second notch of the base. The elastic element pushes the support block in the opposite direction of the positioning ring's displacement to press against the other side wall of the busbar. One side wall of the busbar and the other side wall of the busbar are arranged facing each other. The support plate is arranged below the support block. The second pushing mechanism pushes the support plate along the displacement direction of the positioning ring until it moves to the bottom of the busbar.

[0012] Preferably, the first pushing mechanism has two first elbow clamps, which are adapted to be installed on the base, and the moving ends of the two first elbow clamps are respectively connected to both ends of the positioning ring; the second pushing mechanism has a second elbow clamp, which is arranged between the two first elbow clamps, and the moving end of the second elbow clamp is connected to the support plate.

[0013] Preferably, the device further includes an adjustment mechanism, which has a connecting plate, a first rod, a second rod, and a third block. The connecting plate is arranged below the guide block. One end of the first rod is fixedly connected to a positioning ring. The second rod is arranged perpendicular to the first rod, with one end fixedly connected to the guide block and the other end fixedly connected to the connecting plate. The third block is arranged between the connecting plate and the guide block. The first rod and the second rod both movably pass through the third block. The third block can drive the clamping assembly to move horizontally along the axial direction of the first rod and can drive the clamping assembly to move vertically along the axial direction of the second rod.

[0014] Preferably, the adjusting mechanism also includes a second spring, a locking rod, and a locking seat. The two ends of the second spring are fixedly connected to the third block and the guide block, respectively. One end of the locking seat is fixed to the bottom of the connecting plate, and the other end of the locking seat has a locking groove that movably passes through the third block. The locking rod is threaded onto the third block.

[0015] In this invention, multiple clamping components are installed on a base to correspond to the positions of multiple second-type pins on the busbar and multiple first-type pins on the flat wire stator. This allows for the simultaneous clamping of multiple clamping components. An eccentrically positioned wheel pushes a first block and pulls a second block, creating a push-pull motion. By synchronously controlling the first and second blocks to move in opposite directions in a single operation, two pin pairs can be clamped simultaneously. This simple and quick operation improves processing efficiency. Furthermore, the precise adjustment of the clamping component positions using an adjustment mechanism ensures accurate clamping and positioning, guaranteeing the clamping effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the welding auxiliary tooling proposed in this invention during use; Figure 2 This is a schematic diagram showing the flat wire stator and busbar in a welded state. Figure 3 This is an exploded view of the welding auxiliary tooling, flat wire stator, and busbar proposed in this invention. Figure 4 This is a diagram showing the composition of the clamping assembly and adjustment mechanism of the welding auxiliary tooling proposed in this invention; Figure 5 This is an exploded view of the limiting plate and the first block of the welding auxiliary tooling proposed in this invention; Figure 6 This is a schematic diagram of the first block and the guide block of the welding auxiliary tooling proposed in this invention; Figure 7 This is a schematic diagram of the first and second blocks of the welding auxiliary tooling proposed in this invention before they move and with the limiting plate. Figure 8This is a schematic diagram of the first and second blocks of the welding auxiliary tooling proposed in this invention after they have moved and are positioned relative to the limiting plate. Figure 9 This is a schematic diagram of the first and second blocks of the welding auxiliary tooling and the transmission mechanism proposed in this invention; Figure 10 This is a schematic diagram of the locking rod and locking seat of the welding auxiliary tooling proposed in this invention; Figure 11 This is a schematic diagram of the base of the welding auxiliary tooling proposed in this invention; Figure 12 This is a schematic diagram of the guide bearing and locating pin on the base of the welding auxiliary tooling proposed in this invention; Figure 13 This is a schematic diagram of one type of cover plate for the welding auxiliary tooling proposed in this invention; Figure 14 This is a schematic diagram of a second type of cover plate for the welding auxiliary tooling proposed in this invention. Detailed Implementation

[0017] Reference Figures 1-3 This invention proposes a welding auxiliary fixture for clamping and fixing 2N first-type pins on a flat wire stator 4 and 2N second-type pins on a busbar 5 in a one-to-one correspondence. The flat wire stator 4 has N groups of first-type pins, and the busbar 5 has N groups of second-type pins. In the first-type pin groups, two first-type pins are arranged at a first interval, and in the second-type pin groups, two second-type pins are arranged at a second interval. The first interval is smaller than the second interval, so that the busbar 5 can be inserted into the flat wire stator 4 to form N pin pairs composed of first-type pins and second-type pins.

[0018] Because the welding precision requirements for the first type of pins on the flat wire stator 4 and the second type of pins on the busbar 5 in flat wire motors are high, traditional techniques require manual clamping, resulting in significant time consumption and impacting production efficiency. To address this issue, the welding auxiliary fixture proposed in this invention includes the following specific structure: Figure 1-14 The base 1 shown and the N clamping components 2 connected to the base 1 can be used to automatically clamp the pin pairs to be soldered, replacing manual labor.

[0019] The base 1 has N clamping components 2, which can quickly clamp multiple pin pairs on the flat wire stator 4, improving production efficiency. The structure of the base 1 is as follows: Figure 11 , Figure 12The diagram shows a first plate 11 and a second plate 12. The first plate 11 is arranged perpendicular to the axis of the flat wire stator 4. The first plate 11 has a first through hole 111 that is parallel to the axial direction of the flat wire stator 4 and passes through the first plate 11. A limiting ring 112 is fixedly connected to the inner wall of the first through hole 111. The inner diameter of the first through hole 111 is greater than or equal to the outer diameter of the flat wire stator 4, and the inner diameter of the limiting ring 112 is smaller than the outer diameter of the flat wire stator 4. When the first plate 11 is fitted onto the end face of the flat wire stator 4, the end face of the flat wire stator 4 contacts the limiting ring 112 so that the limiting ring 112 constitutes a limit on the first plate 11 in the axial direction of the flat wire stator 4. The second plate 12 has a second notch 1221 that is parallel to the axial direction of the flat wire stator 4 and passes through the second plate 12. The second notch 1221 occupies a part of the area of ​​the first through hole 111 in the circumferential direction so that the second plate 12 covers the remaining part of the area of ​​the first through hole 111.

[0020] During installation, the first plate 11 is placed on the flat wire stator 4, and the axis of the first through hole 111 on the first plate 11 is aligned with the axis of the flat wire stator 4. The second notch 1221 on the second plate 12 is aligned with the area where the first type of pin wire is located on the flat wire stator 4. The second plate 12 consists of a vertical baffle 121 and a horizontal baffle 122. The vertical baffle 121 is detachably connected to the limiting ring 112. The horizontal baffle 122 is fixedly connected to the vertical baffle 121 and extends horizontally from the vertical baffle 121 towards the center of the first through hole 111. The second notch 1221 is arranged on the horizontal baffle 122. The vertical baffle 121 is a non-complete ring structure, and the projected area of ​​the horizontal baffle 122 is smaller than the area of ​​the first through hole 111. The vertical baffle 121 and the horizontal baffle 122 can shield the welding area of ​​the flat wire stator 4 to prevent welding slag from falling into the interior of the flat wire stator 4 and affecting the welding quality. During the installation of the base 1, the positioning pin 13 at the bottom of the first plate 11 needs to be inserted into the core gap of the flat wire stator 4 to limit the degree of freedom of the flat wire stator 4. At the same time, the guide bearing 14 at the bottom of the first plate 11 contacts the outer wall of the flat wire stator 4 to achieve positioning. The guide bearing 14 is installed at the bottom of the base 1 through the guide mounting block 141. At least two guide bearings 14 are provided and are evenly distributed around the first through hole 111. The bottom of the first plate 11 also has a mounting groove 142 for the guide mounting block 141 to move within a preset range, so that it can be used for flat wire stators 4 of different sizes.

[0021] During the welding process, in order to minimize the amount of weld slag that falls into the flat wire stator 4 through the second notch 1221 on the second plate 12, such as... Figure 13 and Figure 14As shown, a cover plate 15 is also provided on the base 1. This cover plate 15 is detachably installed on the second plate 12 corresponding to the second notch 1221 to cover a portion of the area occupied by the second notch 1221 in the circumferential direction of the second through hole 151. The cover plate 15 has a second through hole 151 through which the pins to be welded pass, so that the cover plate 15 can shield the welding slag while satisfying the welding requirements. This increases the success rate of welding the flat wire stator 4. The clamping component 2 can also be hidden under the cover plate 15, reducing damage to the clamping component 2 during the welding process and reducing the manpower and material resources required to replace the clamping component 2.

[0022] Since the first and second type pins need to be cut before welding to ensure their length meets welding requirements, the cover plate 15 is divided into two types based on different operating procedures: a cutting cover plate and a welding cover plate. The difference between the cutting cover plate and the welding cover plate is that the cross-sectional thickness of the area where the second through hole 151 is located on the cutting cover plate is greater than that on the welding cover plate. This setting makes the plane of the cutting cover plate flush with the first and second type pins after cutting, so as to better protect the pins and ensure that the pins are not deformed by force during cutting. In addition, the size of the second through hole 151 is smaller to ensure that the pins are not deformed as much as possible, and the waste generated will not fall into the lower part. During the welding process, considering that welding will reduce the length of the pin wire, a groove is dug downwards in the area where the second through hole 151 is located on the welding processing cover plate. Also, the pin wire end may melt and become larger due to the welding process. If the original hole size is maintained, it may not be easy to remove. Therefore, the hole size of the second through hole 151 on the welding processing cover plate is appropriately increased to ensure that it can be easily removed after welding is completed.

[0023] After the base 1 is installed, the busbar 5 needs to be inserted between the multiple first-type pins of the flat wire stator 4 located at the second notch 1221 of the second plate 12. This is to fix the position of the busbar 5, as follows: Figure 11 and Figure 12As shown: The base 1 is also provided with a positioning ring 6, a support block 7, a support plate 8, an elastic element 71, a first pushing mechanism, and a second pushing mechanism. The positioning ring 6 is adapted to be installed on the edge surface of the second notch 1221 on the second plate 12. The first pushing mechanism has two first elbow clamps 61, which are adapted to be installed on the first plate 11. The moving ends of the two first elbow clamps 61 are respectively connected to the two ends of the positioning ring 6. The first elbow clamps 61 push the positioning ring 6 to move until they press against one side wall of the busbar 5. The support block 7 is arranged facing the positioning ring 6 and is adapted to be installed in the second notch 1221 on the second plate 12. The elastic element 71 pushes the support block 7 in the opposite direction of the displacement of the positioning ring 6 to press against the other side wall of the busbar 5. The one side wall of the busbar 5 and the other side wall of the busbar 5 are arranged facing each other. In this way, the positioning ring 6 and the support block 7 can be used to clamp the busbar 5 from two opposing directions to achieve the function of fixing the position of the busbar 5.

[0024] A support plate 8 is positioned below the support block 7. The second pushing mechanism has a second elbow clamp 81, which is positioned between two first elbow clamps 61. The moving end of the second elbow clamp 81 is connected to the support plate 8. Before inserting the busbar 5, the second elbow clamp 81 can be moved to push the support plate 8 from below the second plate 12 into the second notch 1221 of the second plate 12 along the displacement direction of the positioning ring 6. Next, the busbar 5 is aligned with the position of the first type pin line and installed in the installation position of the busbar 5 in the second notch 1221 on the second plate 12. At this time, the busbar 5 is placed on the support plate 8, and the support plate 8 supports the busbar 5 from below and restricts its downward degree of freedom. Due to gravity, its upward degree of freedom is basically constrained without the action of external force. At the same time, the support block 7 on the base 1 is supported by the elastic element 71 (which can be a spring, with the two ends of the spring respectively fixing the support block 7 and the second plate 12) to push the busbar 5. Then, the first elbow clamp 61 is moved to cause the first elbow clamp 61 to drive the positioning ring 6 to press the manifold 5 from the direction of the force relative to the elastic member 71, so that the manifold 5 can be clamped between the positioning ring 6 and the support block 7, thereby achieving the positioning effect.

[0025] Next, clamping components 2 need to be installed at the positions corresponding to the multiple pin pairs that need to be soldered, such as... Figures 4-9As shown, the clamping assembly 2 specifically includes a first block 21, a second block 22, a transmission mechanism 24, a limiting plate 23, a first circular protrusion 212, and a second circular protrusion 221. The first block 21 has a first guide groove 211 that penetrates the first block 21, and the first block 21 has a first wall. The second block 22 is adapted to be installed in the first guide groove 211 and can move along the extension direction of the first guide groove 211, i.e., the first direction. The second block 22 has a second wall, and both the first wall and the second wall are arranged perpendicular to the extension direction of the first guide groove 211. The first block 21 has a first notch 213 that penetrates the first block 21 perpendicular to the first direction, and the first wall is the inner wall of the first notch 213. The second block 22 has a through hole 222 that penetrates the second block 22 perpendicular to the first direction, and the second wall is the inner wall of the through hole 222. The limiting plate 23 is installed on the base 1. A guide block 26 is detachably installed on the bottom of the limiting plate 23. A second guide groove 261 is arranged on the guide block 26. The first block 21 is adapted to be installed in the second guide groove 261 and can move back and forth along the extension direction of the second guide groove 261. The limiting plate 23 is provided with a first waist-shaped slot 231 and a second waist-shaped slot 232. A first circular protrusion 212 is fixed on the first block 21 and passes through the first waist-shaped slot 231. A second circular protrusion 221 is fixed on the second block 22 and passes through the second waist-shaped slot 232.

[0026] Before performing the clamping action, the clamping assembly 2 adjusts the first wall on the first block 21 and the second wall on the second block 22 to a position that contacts the first type of pin wire. Specifically, as shown in the figure... Figure 4 and Figure 10 As shown, the adjustment mechanism 3 has a connecting plate 31, a first rod 32, a second rod 33, and a third block 34. The connecting plate 31 is arranged below the guide block 26. One end of the first rod 32 is fixedly connected to a positioning ring. The second rod 33 is arranged perpendicular to the first rod 32, with one end fixedly connected to the guide block 26 and the other end fixedly connected to the connecting plate 31. The third block 34 is arranged between the connecting plate 31 and the guide block 26, and both the first rod 32 and the second rod 33 can move through the third block 34.

[0027] The operator can move the third block 34 along the first rod 32, and use the third block 34 to drive the guide block 26 and the clamping component 2 installed on the guide block 26 to make a horizontal displacement closer to the positioning ring. Then, the operator can move the guide block 26 and the connecting plate 31 along the second rod 33 to drive the clamping component 2 installed on the guide block 26 to make a vertical downward displacement closer to the positioning ring. At this time, the first wall of the first block 21 and the second wall of the second block 22 can be moved to the vicinity of the pin pair to be welded.

[0028] Next, the position of the guide block 26 needs to be fixed, which means fixing the positions of the N clamping components 2. The adjustment mechanism 3 also has a second spring 35, a locking rod 36, and a locking seat 37. The two ends of the second spring 35 are fixedly connected to the third block 34 and the guide block 26, respectively. One end of the locking seat 37 is fixed to the bottom of the connecting plate 31, and the other end of the locking seat 37 has a locking groove 371 that moves through the third block 34. The locking rod 36 is threaded onto the third block 34. As the guide block 26 and the second rod 33 move down synchronously, the locking seat 37 will also move down through the connecting plate 31 until the center of the locking groove 371 on the locking seat 37 is moved to a position flush with the axis of the locking rod 36. Then the locking rod 36 can be rotated until the rod head of the locking rod 36 extends into the locking groove 371 to prevent the locking seat 37 and the connecting plate 31 from moving down further, thus achieving the effect of locking the height of the guide block 26 and the clamping components.

[0029] The aforementioned base 1 and adjustment mechanism 3 allow for the quick installation of multiple clamping components 2 corresponding to the pin pairs to be clamped, which helps improve the installation efficiency of welding auxiliary tooling.

[0030] Then, the operator can control the clamping assembly 2 to perform the following clamping operation by operating the transmission mechanism 24: the transmission mechanism 24 can move the first block 21 to the first preset position so that the first wall on the first block 21 pushes one of the first type pins in the group to press one of the second type pins in the group. The transmission mechanism 24 will then move the second block 22 to the second preset position so that the second wall on the second block 22 pushes another first type pin in the group to press another second type pin in the group, thus achieving the effect of clamping the pin pair. During the process of the transmission mechanism 24 moving the first block 21 to the first preset position, the first circular protrusion 212 gradually moves from abutting against the upstream semicircle of the first block 21 in the first waist-shaped slot 231 in the direction of movement to abutting against the downstream semicircle of the first waist-shaped slot 231; during the process of the transmission mechanism 24 moving the second block 22 to the second preset position, the second circular protrusion 221 gradually moves from abutting against the downstream semicircle of the first block 21 in the second waist-shaped slot 232 in the direction of movement to abutting against the upstream semicircle of the second waist-shaped slot 232.

[0031] Specifically, the specific structure of the aforementioned transmission mechanism 24 is as follows: Figure 7 and Figure 9As shown, it includes: a second shaft 242, a first shaft 241, and an operating member 243. The axis of the second shaft 242 is arranged perpendicular to the first direction. The axis of the first shaft 241 is arranged along the first direction. One end of the first shaft 241 is fixed to the second block 22 in the first guide groove 211, and the other end of the first shaft 241 movably passes through the first block 21 and is rotatably connected to the second shaft 242. The operating member 243 includes a gripping part 2431 and a wheel part 2432 extending from one end of the gripping part 2431. The wheel part 2432 is eccentrically connected to the second shaft 242 and abuts against the first block 21. When operating the clamping assembly 2, the operator can operate the gripping part 2431 to drive the wheel part 2432 to rotate 180° in a direction perpendicular to the first direction. The wheel part 2432 pushes the first wall of the first block 21 to press the first type of pin wire in the pin wire pair. During this process, the wheel part 2432 simultaneously pulls the first shaft 241 and the second block 22 backward through the second shaft 242 until the second wall on the second block 22 can press the first type of pin wire in another pin wire pair. This allows the first type of pin wire to press the second type of pin wire in the pin wire pair, forming a push-pull motion process to achieve the clamping effect. The operation is simple and convenient, which helps to improve processing efficiency.

[0032] It is worth noting that during the clamping process, the first circular protrusion 212 on the first block 21 and the second circular protrusion 221 on the second block 22 approach each other. The sum of the formation of the first circular protrusion 212 and the second circular protrusion 221 is exactly equal to the eccentricity of the wheel body 2432. This design can precisely control the movement distance of the first block 21 and the second block 22. By replacing the limiting plate 23 with a first waist-shaped slot 231 and a second waist-shaped slot 232 of different lengths, this welding auxiliary tooling can also be applied to flat wire stators 4 with different first spacings and busbars 5 with different second spacings, increasing the possibility of changing the tooling of this invention and making it highly applicable.

[0033] After the first block 21 and the second block 22 reach the first preset position and the second preset position, respectively, to lock the positions of the first block 21 and the second block 22, a first spring 25 is coaxially sleeved on the first shaft 241. The first spring 25 is located at the end of the first guide groove 211 away from the first wall, and its two ends abut against the second block 22 and the end wall of the first guide groove 211, respectively. This allows the first spring 25 to be compressed after the wheel 2432 rotates 180°, so that the first spring 25 can apply a resistance torque to the wheel 2432 opposite to its rotational trend. The force of the first spring 25 achieves a locking effect, ensuring that the first block 21 and the second block 22 are in the clamped position. Then, the clamped pin pair can be further processed.

[0034] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A welding auxiliary fixture for clamping and fixing 2N first-type pins on a flat wire stator and 2N second-type pins on a busbar in a one-to-one correspondence. The flat wire stator has N groups of first-type pins, and the busbar has N groups of second-type pins. In the first-type pin groups, two first-type pins are arranged at a first interval, and in the second-type pin groups, two second-type pins are arranged at a second interval. The first spacing is smaller than the second spacing, characterized in that it includes: a base and N clamping assemblies, all of which are connected to the base. Each clamping assembly specifically includes a first block, a second block, and a transmission mechanism. The first block has a first guide groove that penetrates through the first block, and the first block has a first wall. The second block is adapted to be installed in the first guide groove and can move along the extension direction of the first guide groove, i.e., the first direction. The second block has a second wall, and both the first wall and the second wall are arranged perpendicular to the extension direction of the first guide groove. The transmission mechanism, in conjunction with the first wall on the first block and the second wall on the second block, presses against two second-type pins in the same group. The transmission mechanism, in conjunction with the first wall on the first block and the second wall on the second block, presses two second-type pins in the same group as follows: When there is a one-to-one correspondence between N groups of first-type pins and N groups of second-type pins, with two first-type pins in the same group located between two second-type pins in the same group, N clamping components are arranged on the base according to a preset positional relationship, so that the N clamping components can simultaneously perform the following operations on a group of first-type pins and a group of second-type pins with the above positional relationship: The transmission mechanism can move the first block to a first preset position, causing the first wall on the first block to push one of the first-type pins in the group to press one of the second-type pins in the group; the transmission mechanism will simultaneously move the second block to a second preset position, causing the second wall on the second block to push another first-type pin in the group to press another second-type pin in the group. Also includes: A limiting plate is installed on the base, and a first waist-shaped slot and a second waist-shaped slot are provided on it. A guide block is detachably installed at the bottom of the limiting plate, and a second guide groove is arranged on the guide block. The first block is adapted to be installed in the second guide groove and can move back and forth along the extension direction of the second guide groove. The first circular protrusion is fixed to the first block and passes through the first waist-shaped slot; The second circular protrusion is fixed to the second block and passes through the second waist-shaped slot. During the process of the transmission mechanism linking the first block to move to the first preset position, the first circular protrusion gradually moves from abutting against the upstream semicircle in the first waist-shaped slot in the direction of movement of the first block to abutting against the downstream semicircle in the first waist-shaped slot. During the process of the transmission mechanism linking the second block to move to the second preset position, the second circular protrusion gradually moves from abutting against the downstream semicircle in the second waist-shaped slot in the direction of movement of the first block to abutting against the upstream semicircle in the second waist-shaped slot. The transmission mechanism specifically includes: The second shaft is arranged with its axis perpendicular to the first direction; The first shaft has its axis arranged along a first direction. One end of the shaft is fixed to the second block in the first guide groove, and the other end movably passes through the first block and is rotatably connected to the second shaft. The operating component includes: a grip portion and a wheel portion extending from one end of the grip portion, the wheel portion being eccentrically connected to the second axle, and the wheel portion abutting against the first block; When the operating grip drives the wheel to rotate in a direction perpendicular to the first direction, the wheel will push the first block and simultaneously pull the second block, causing the first circular protrusion and the second circular protrusion to move closer or further apart. The process of the first circular protrusion and the second circular protrusion moving closer together is the process of the transmission mechanism linking the first block to move to the first preset position and simultaneously linking the second block to move to the second preset position.

2. The welding auxiliary tooling according to claim 1, characterized in that, It also includes a first spring, which is coaxially sleeved on the first shaft. The first spring is located at the end of the first guide groove away from the first wall. The two ends of the first spring abut against the second block and the end wall of the first guide groove, respectively, to apply a resistance torque to the eccentric wheel that is opposite to its rotation trend.

3. The welding auxiliary tooling according to claim 1, characterized in that, The first block has a first notch perpendicular to the first direction, penetrating the first block, and the first wall is the inner wall of the first notch; the second block has a through hole perpendicular to the first direction, penetrating the second block, and the second wall is the inner wall of the through hole.

4. The welding auxiliary tooling according to claim 1, characterized in that, The base has a second notch, which corresponds to the welding position of the busbar on the flat wire stator; The welding auxiliary fixture also includes a positioning ring, a support block, a support plate, an elastic element, a first pushing mechanism, and a second pushing mechanism. The positioning ring is adapted to be installed on the edge surface of the second notch of the base. The first pushing mechanism pushes the positioning ring to move until it presses against one side wall of the busbar. The support block is arranged facing the positioning ring and is adapted to be installed in the second notch of the base. The elastic element pushes the support block in the opposite direction of the positioning ring's displacement to press against the other side wall of the busbar. One side wall of the busbar and the other side wall of the busbar are arranged facing each other. The support plate is arranged below the support block. The second pushing mechanism pushes the support plate to move to the bottom of the busbar along the displacement direction of the positioning ring.

5. The welding auxiliary tooling according to claim 4, characterized in that, The first pushing mechanism has two first elbow clamps, which are adapted to be installed on the base, and the moving ends of the two first elbow clamps are respectively connected to the two ends of the positioning ring; the second pushing mechanism has a second elbow clamp, which is arranged between the two first elbow clamps, and the moving end of the second elbow clamp is connected to the support plate.

6. The welding auxiliary tooling according to claim 4, characterized in that, It also includes an adjustment mechanism, which has a connecting plate, a first rod, a second rod, and a third block. The connecting plate is arranged below the guide block. One end of the first rod is fixedly connected to a positioning ring. The second rod is arranged perpendicular to the first rod, with one end fixedly connected to the guide block and the other end fixedly connected to the connecting plate. The third block is arranged between the connecting plate and the guide block. The first rod and the second rod both movably pass through the third block. The third block can drive the clamping assembly to move horizontally along the axis of the first rod and can drive the clamping assembly to move vertically along the axis of the second rod.

7. The welding auxiliary tooling according to claim 6, characterized in that, The adjusting mechanism also has a second spring, a locking rod and a locking seat. The two ends of the second spring are fixedly connected to the third block and the guide block respectively. One end of the locking seat is fixed to the bottom of the connecting plate, and the other end of the locking seat has a locking groove that moves through the third block. The locking rod is threaded onto the third block.

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