A spot welding device for micro DC motor terminals

Abstract

The present invention relates to the field of micro motor processing technology, and specifically to a micro DC motor terminal spot welding device, including a support body and a positioning bracket, a movable ring is slidably installed on the outer wall of the support body, two symmetrically arranged adjustment grooves are provided on the outer wall of the support body, a lifting unit is arranged in the adjustment groove, a spot welding unit is fixedly installed on the telescopic end of the lifting unit, four symmetrically arranged fixed brackets are fixedly installed on the inner ring wall of the support body, and a positioning module is fixedly installed at one end of the four fixed brackets close to each other and located at the center of the circle of the support body. The present invention designs a positioning bracket, and the welding copper sheet and the terminal can be pre-spliced ​​and kept fixed by adjusting the telescopic rod and the splicing unit on the positioning bracket. When spot welding is performed, the end cover together with the positioning bracket can be directly inserted into the positioning module to complete the positioning, which solves the problem of low precision of manual splicing when welding motor terminals.

Description

Technical Field

[0001] The invention relates to the technical field of micro motor processing, and in particular to a micro DC motor terminal spot welding device. Background Art

[0002] A micro motor is a smaller electric motor that is mainly powered by electric energy. It is mainly composed of a stator, a rotor, terminals and an outer casing.

[0003] The terminal is plugged into the outer shell and in contact with the rotor. The terminal is connected to an external power source and conducts it to the rotor to make it rotate. Therefore, two conductive copper sheets are usually fixedly installed on the outside of the terminal. When in use, the wire needs to be connected to the conductive copper sheet. However, due to its small size, the general micro motor, in order to quickly insert the conductive copper sheet into the terminal during production, the conductive copper sheet used on the terminal is generally short, which is not conducive to subsequent installation and connection. Therefore, after the motor terminal is produced, it is usually necessary to spot weld the conductive copper sheet on the terminal to extend the length of the conductive copper sheet. At present, when spot welding the conductive copper sheet on the terminal, it is all done manually. The copper sheet is manually aligned with the conductive copper sheet on the terminal and superimposed, and then the two copper sheets are spot welded by a spot welding device. This operation method is relatively primitive and inefficient. Secondly, the terminal of the micro motor is generally small, and the volume of the installed copper sheet will be even smaller. Manual alignment is prone to deviation, which can easily lead to the deviation of the welding position of the copper sheet, affecting the strength of the connection after the copper sheet is welded. Therefore, a micro DC motor terminal spot welding device is urgently needed. Summary of the invention

[0004] The purpose of the present invention is to solve the problems in the background technology and to propose a micro DC motor terminal spot welding device.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a micro DC motor terminal spot welding device, comprising a support body and a positioning bracket, the support body is in a circular ring structure, a moving ring is slidably installed on the outer wall of the support body, two symmetrically arranged adjustment grooves are provided on the outer wall of the support body, and a lifting unit is arranged in the adjustment groove. The installation directions of the two lifting units are arranged opposite to each other, a spot welding unit is fixedly installed on the telescopic end of the lifting unit, and the lifting unit is fixedly connected to the moving ring. Four symmetrically arranged fixed brackets are fixedly installed on the inner ring wall of the support body, and a positioning module is fixedly installed at one end of the four fixed brackets close to each other and located at the center of the support body;

[0006] The positioning bracket is in a circular ring structure, and the positioning bracket is sleeved on the outer wall of the motor end cover, and the motor end cover is inserted on the positioning module.

[0007] In the above-mentioned micro DC motor terminal spot welding device, four supporting telescopic rods are fixedly installed in the positioning module. The four supporting telescopic rods are symmetrically arranged in pairs. The installation directions of the two symmetrically arranged supporting telescopic rods are opposite to each other. The telescopic ends of the two symmetrically arranged supporting telescopic rods respectively pass through the top and bottom of the positioning module, and pressure sensors are inserted on the telescopic ends of the supporting telescopic rods.

[0008] In the above-mentioned micro DC motor terminal spot welding device, plug-in rods are rotatably installed at both ends of the positioning module, and the outer wall of the plug-in rod is provided with a plurality of shrinkage grooves evenly distributed along its circumference, and a spring plate with an arc-shaped structure is fixedly installed on the inner wall of the shrinkage groove, and an extrusion block is fixedly installed on the outer wall of the spring plate, and the extrusion block extends out of the shrinkage groove, and the top of the extrusion block is provided with symmetrically arranged inclined surfaces.

[0009] In the above-mentioned micro DC motor terminal spot welding device, two symmetrically arranged positioning rods are fixedly installed at both ends of the positioning module and located on the outside of the plug-in rod. A positioning telescopic rod is inserted into the end of the positioning rod away from the plug-in rod. A positioning shaft is rotatably installed at the end of the positioning telescopic rod away from the positioning rod, and one end of the positioning shaft is a conical structure.

[0010] In the above-mentioned micro DC motor terminal spot welding device, two supporting platforms are fixedly installed on the outer ring wall of the positioning bracket, and the installation positions of the two supporting platforms are staggered with each other. Adjustment slots are opened on the two supporting platforms, and an adjustment slider is slidably installed in the adjustment slot. A connecting shaft is rotatably installed on the adjustment slider, and one end of the connecting shaft extends out of the adjustment slot and is fixedly installed with an adjustment telescopic rod, and a splicing unit is fixedly installed at the telescopic end of the adjustment telescopic rod.

[0011] In the above-mentioned micro DC motor terminal spot welding device, the splicing unit is composed of two splicing frames, the splicing frames are L-shaped curved structures, the installation directions of the two splicing frames are set in opposite directions to each other, and a number of connecting telescopic rods are arranged between the two splicing frames. The two ends of the connecting telescopic rods are respectively inserted into the two splicing frames, and one of the two splicing frames is fixedly connected to the telescopic end of the adjustable telescopic rod.

[0012] In the above-mentioned micro DC motor terminal spot welding device, a splicing groove is opened on one side of the splicing frame, and a plurality of evenly distributed spring sheets are fixedly installed on the inner wall of the splicing groove. The spring sheets are in an L-shaped curved structure, and a rubber strip is fixedly installed on the inner wall of the splicing groove and on the side away from the spring sheets. The installation positions of the spring sheets and rubber strips on the inner walls of the splicing grooves on the two splicing frames are staggered with each other.

[0013] In the above-mentioned micro DC motor terminal spot welding device, a plurality of through grooves are opened on the telescopic end of the adjustable telescopic rod, the through grooves pass through the telescopic end of the adjustable telescopic rod, a rotating shaft is rotatably installed on the inner wall of the through groove, and an extrusion strip with an arc-shaped structure is fixedly installed on the rotating shaft.

[0014] Compared with the existing technology, the advantages of the micro DC motor terminal spot welding device are: the present invention designs a positioning bracket, and the welding copper sheet and the terminal can be spliced ​​and fixed in advance through the adjustable telescopic rod and the splicing unit on the positioning bracket. When spot welding, the end cover together with the positioning bracket can be directly inserted into the positioning module to complete the positioning, which solves the problem of low manual splicing accuracy during motor terminal welding. At the same time, the spot welding unit can be driven to perform spot welding in a reciprocating cycle through the automated operation moving ring, which greatly improves the efficiency of terminal spot welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the supporting body and the positioning bracket in the present invention.

[0016] Figure 2 The present invention Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0017] Figure 3 The present invention Figure 1 Schematic diagram of the local enlarged structure at point B in the middle.

[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the positioning bracket in the present invention.

[0019] Figure 5 It is a three-dimensional structural schematic diagram of the positioning module in the present invention.

[0020] Figure 6 It is a schematic cross-sectional structural diagram of the adjustable telescopic rod in the present invention.

[0021] Figure 7 The present invention Figure 6 Schematic diagram of the local enlarged structure at point C in the middle.

[0022] Figure 8 The present invention Figure 6 Schematic diagram of the local enlarged structure at point D in the middle.

[0023] Fig. 9 It is a schematic cross-sectional structural diagram of the positioning rod and the positioning telescopic rod in the present invention.

[0024] Fig.10 It is a partial cross-sectional structural schematic diagram of the splicing frame in the present invention.

[0025] Fig.11It is a structural schematic diagram of the micro motor end cover in the present invention.

[0026] In the figure: 1. supporting body; 2. positioning bracket; 101. moving ring; 102. adjusting groove; 103. lifting unit; 104. spot welding unit; 105. fixing bracket; 3. positioning module; 301. supporting telescopic rod; 302. plug-in rod; 303. shrinking groove; 304. spring plate; 305. extrusion block; 306. positioning rod; 307. positioning telescopic rod; 308. positioning shaft; 201. supporting platform; 202. adjusting slide groove; 203. adjusting slider; 204. connecting shaft; 205. adjusting telescopic rod; 4. splicing unit; 401. splicing frame; 402. connecting telescopic rod; 403. splicing groove; 404. spring sheet; 206. through groove; 207. rotating shaft; 208. extrusion strip. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0028] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] Reference Figure 1-Figure 11 A micro DC motor terminal spot welding device includes a support body 1 and a positioning bracket 2. The support body 1 is a circular ring structure. A moving ring 101 is slidably installed on the outer wall of the support body 1. Two symmetrically arranged adjustment grooves 102 are provided on the outer wall of the support body 1. A lifting unit 103 is arranged in the adjustment groove 102. The installation directions of the two lifting units 103 are arranged opposite to each other. A spot welding unit 104 is fixedly installed on the telescopic end of the lifting unit 103. The lifting unit 103 is fixedly connected to the moving ring 101.

[0030] Four symmetrically arranged fixed brackets 105 are fixedly installed on the inner ring wall of the support body 1, and a positioning module 3 is fixedly installed at one end of the four fixed brackets 105 close to each other and located at the center of the support body 1. The support body 1 is fixedly installed on the desktop through the brackets, and the moving ring 101 reciprocates on the outer wall of the support body 1 through a lead screw. The movement of the moving ring 101 can drive the lifting unit 103 and the spot welding unit 104 to move synchronously. The lifting unit 103 drives the spot welding unit 104 to cooperate with the positioning module 3 to realize automatic spot welding of the micro motor terminals, which greatly improves the processing efficiency of the micro motor terminals.

[0031] The positioning bracket 2 is in a circular ring structure. The positioning bracket 2 is sleeved on the outer wall of the motor end cover, and the motor end cover is inserted on the positioning module 3.

[0032] Four telescopic support rods 301 are fixedly installed in the positioning module 3. The four telescopic support rods 301 are symmetrically arranged in pairs. The installation directions of the two symmetrically arranged telescopic support rods 301 are opposite to each other. The telescopic ends of the two symmetrically arranged telescopic support rods 301 respectively penetrate the top and bottom of the positioning module 3. Pressure sensors are inserted on the telescopic ends of the telescopic support rods 301. The telescopic support rods 301 are electrically driven. The telescopic ends of the telescopic support rods 301 can contact the bottom of the terminal on the end cover to cooperate with the spot welding unit 104 to spot weld the terminal. The pressure sensor on the telescopic end of the telescopic support rod 301 is used to control the telescopic position of the telescopic end of the telescopic support rod 301 to avoid excessive telescopic extension of the telescopic end of the telescopic support rod 301 and cause deformation of the terminal.

[0033] Both ends of the positioning module 3 are rotatably mounted with a plug rod 302, and the outer wall of the plug rod 302 is provided with a plurality of contraction grooves 303 evenly distributed along its circumference, and a spring plate 304 with an arc structure is fixedly mounted on the inner wall of the contraction groove 303, and an extrusion block 305 is fixedly mounted on the outer wall of the spring plate 304, and the extrusion block 305 extends out of the contraction groove 303, and the top of the extrusion block 305 is provided with a symmetrically arranged inclined surface, and the plug rod 302 is used to be inserted into the through hole on the end cover for plugging the end cover, and at the same time, when the end cover is plugged into the plug When the rod 302 is on, it will contact the extrusion block 305 on the spring plate 304. At this time, continuing to push the end cover can press the extrusion block 305 and the spring plate 304, and the pressed spring plate 304 will move into the contraction groove 303. At this time, the end cover is successfully inserted into the plug-in rod 302, and after the end cover passes, the spring plate 304 and the extrusion block 305 will automatically reset under the rebound effect of the spring plate 304. At this time, the end cover can be positioned by being blocked by the extrusion block 305 to prevent the end cover from moving during the positioning and spot welding process.

[0034] Two symmetrically arranged positioning rods 306 are fixedly installed at both ends of the positioning module 3 and located on the outside of the plug-in rod 302. A positioning telescopic rod 307 is inserted at one end of the positioning rod 306 away from the plug-in rod 302. A positioning shaft 308 is rotatably installed at one end of the positioning telescopic rod 307 away from the positioning rod 306. One end of the positioning shaft 308 is in a conical structure. The end caps of the micro motors are mostly in a circular structure. In order to fix the end caps to the outer shell, symmetrical grooves are usually provided on the outer wall of the end caps to facilitate the fixing of the clamping structure on the shell to the end caps. Therefore, when the end caps are inserted on the plug-in rod 302, the outer wall of the end caps will be aligned with the two positioning shafts 30 8, since the end of the positioning shaft 308 close to the end cover is a pointed cone structure, when the end cover contacts the positioning shaft 308, a horizontal extrusion force is applied to the positioning shaft 308, and the positioning shaft 308 is forced to drive the positioning telescopic rod 307 to extend, and when the end cover is inserted into the specified position, the end cover is rotated, and when the groove on the end cover rotates to the specified position and is aligned with the positioning shaft 308, the positioning shaft 308 is driven by the positioning telescopic rod 307 to be clamped in the groove on the end cover. At this time, the end cover can be positioned by the positioning shaft 308, so that the terminal on the end cover remains in a horizontal state and is aligned with the spot welding unit 104 and the supporting telescopic rod 301.

[0035] Two supporting platforms 201 are fixedly installed on the outer ring wall of the positioning bracket 2. The installation positions of the two supporting platforms 201 are staggered with each other. Both supporting platforms 201 are provided with adjustment slots 202. An adjustment slider 203 is slidably installed in the adjustment slots 202. A connecting shaft 204 is rotatably installed on the adjustment slider 203. One end of the connecting shaft 204 extends out of the adjustment slot 202 and is fixedly installed with an adjustment telescopic rod 205. The telescopic end of the adjustment telescopic rod 205 is fixedly installed with a splicing unit 4. The supporting platform 201 is used for adjusting The telescopic rod 205 is adjusted for support, and the adjusting slot 202 cooperates with the adjusting slider 203 to drive the telescopic rod 205 to move horizontally, which is convenient for adjustment according to the length of the welding copper sheet. The connecting shaft 204 allows the telescopic rod 205 to rotate. When the telescopic rod 205 is rotated to be flush with the positioning bracket 2, the positioning bracket 2 can be conveniently mounted on the end cover. After the positioning bracket 2 is mounted on the end cover, the telescopic rod 205 is rotated and the welding copper sheet and the terminal are spliced, contacted and fixed to each other through the splicing unit 4.

[0036] The splicing unit 4 is composed of two splicing frames 401, which are L-shaped curved structures. The installation directions of the two splicing frames 401 are set opposite to each other. A number of connecting telescopic rods 402 are set between the two splicing frames 401. The two ends of the connecting telescopic rods 402 are respectively inserted into the two splicing frames 401. One of the two splicing frames 401 is fixedly connected to the telescopic end of the adjusting telescopic rod 205. The two splicing frames 401 are connected by connecting the telescopic rod 402, and the two splicing frames 401 can be pulled apart by connecting the telescopic rod 402, so as to adapt to the lengths of different welding copper sheets.

[0037] A splicing groove 403 is provided on one side of the splicing frame 401, and a plurality of evenly distributed spring sheets 404 are fixedly installed on the inner wall of the splicing groove 403. The spring sheets 404 are in an L-shaped curved structure. A rubber strip is fixedly installed on the inner wall of the splicing groove 403 and on one side away from the spring sheets 404. The installation positions of the spring sheets 404 and the rubber strips on the inner walls of the splicing grooves 403 on the two splicing frames 401 are staggered with each other. When installing the copper sheet, the copper sheet is inserted into the splicing groove 403. The spring sheets 404 on the inner wall of the splicing groove 403 can resist the welded copper sheet to achieve a fixing effect. After the positioning bracket 2 is sleeved on the end cover, the telescopic rod 205 is operated and adjusted to rotate and be flush with the positioning bracket 2 to weld the copper sheet. Plug it into the splicing groove 403, rotate the adjusting telescopic rod 205 to the specified position, at this time, the splicing frame 401 is aligned with the terminal on the end cover, press the splicing frame 401 to shrink the adjusting telescopic rod 205, and at the same time, the splicing frame 401 will move closer to the terminal after being pressed, and when the terminal is inserted into the splicing groove 403, it can be spliced ​​with the welding copper sheet, and the installation positions of the spring pieces 404 in the two splicing grooves 403 are staggered to facilitate the smooth insertion of the terminal. The spring piece 404 on the splicing frame 401 connected to the adjusting telescopic rod 205 is installed on the upper part of the inner wall of the corresponding splicing groove 403, and the spring piece 404 on the other splicing frame 401 is installed on the bottom of the inner wall of the corresponding splicing groove 403. The spring sheet 404 can press the welding copper sheet against the middle position of the splicing groove 403. When the terminal needs to be inserted, the terminal is first overlapped with part of the welding copper sheet. At this time, pressing the splicing frame 401 downward can slightly lift the welding copper sheet, so that the gap between the bottom of the welding copper sheet and the splicing groove 403 is increased, so that the terminal can be smoothly inserted into the splicing groove 403. After the terminal is inserted into the splicing groove 403, the clamping effect can be achieved under the resistance of the spring sheet 404. When the positioning bracket 2 is installed and the end cover is inserted on the plug-in rod 302, the positions of the two welding copper sheets are respectively directly below and directly above their corresponding spot welding units 104, and the positions of the two terminals are respectively at the corresponding supporting telescopic rods 30 1, first operate the corresponding supporting telescopic rod 301 to contact the terminal, and then operate the spot welding unit 104 to spot weld the welding copper sheet, and weld the welding copper sheet to the terminal. After the welding of the terminal on one side of the positioning module 3 is completed, the other end cover that needs spot welding can be directly installed on the other side, and then operate the moving ring 101 to drive the spot welding unit 104 to move to the specified position. The reciprocating movement of the moving ring 101 can reciprocate and cycle The terminals on both sides of the positioning module 3 are spot welded, which greatly improves the spot welding efficiency of the micro motor terminals and reduces the processing cost. At the same time, the pre-splicing of the splicing frame 401 solves the problem of inaccurate manual splicing position in the prior art.

[0038] A plurality of through slots 206 are provided on the telescopic end of the adjusting telescopic rod 205, and the through slots 206 pass through the telescopic end of the adjusting telescopic rod 205. A rotating shaft 207 is rotatably mounted on the inner wall of the through slot 206, and an extrusion strip 208 with an arc-shaped structure is fixedly mounted on the rotating shaft 207. When the adjusting telescopic rod 205 needs to be retracted and needs to be positioned, the rotating shaft 207 at the corresponding position is toggled, and the extrusion strip 208 on the corresponding rotating shaft 207 is rotated 90°. At this time, the extrusion strip 208 is vertical to the telescopic end of the adjusting telescopic rod 205. At this time, after the telescopic end of the adjusting telescopic rod 205 is retracted, the extrusion strip 208 at the corresponding position will abut against the inner wall of the telescopic slot on the adjusting telescopic rod 205, so as to achieve a certain fixing effect.

[0039] It is further explained that the above-mentioned fixed connection should be understood in a broad sense unless otherwise clearly specified and limited. For example, it can be welding, gluing, or one-piece molding, etc., which are conventional means well known to those skilled in the art.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A micro DC motor terminal spot welding device, comprising a supporting body (1) and a positioning bracket (2), characterized in that: The support body (1) is in a circular ring structure. A moving ring (101) is slidably mounted on the outer wall of the support body (1). Two symmetrically arranged adjustment grooves (102) are provided on the outer wall of the support body (1). A lifting unit (103) is arranged in the adjustment groove (102). The two lifting units (103) are installed in opposite directions. A spot welding unit (104) is fixedly mounted on the telescopic end of the lifting unit (103). The lifting unit (103) is fixedly connected to the moving ring (101). Four symmetrically arranged fixed brackets (105) are fixedly mounted on the inner ring wall of the support body (1). A positioning module (3) is fixedly mounted on one end of the four fixed brackets (105) close to each other and located at the center of the support body (1). The positioning bracket (2) is in the form of a circular ring structure, the positioning bracket (2) is sleeved on the outer wall of the motor end cover, and the motor end cover is inserted on the positioning module (3); Four supporting telescopic rods (301) are fixedly installed in the positioning module (3), and the four supporting telescopic rods (301) are symmetrically arranged in pairs, and the installation directions of the two symmetrically arranged supporting telescopic rods (301) are arranged in opposite directions to each other, and the telescopic ends of the two symmetrically arranged supporting telescopic rods (301) respectively penetrate the top and bottom of the positioning module (3), and pressure sensors are inserted into the telescopic ends of the supporting telescopic rods (301); Both ends of the positioning module (3) are rotatably mounted with a plug rod (302), the outer wall of the plug rod (302) is provided with a plurality of contraction grooves (303) evenly distributed along its circumference, a spring plate (304) with an arc-shaped structure is fixedly mounted on the inner wall of the contraction groove (303), an extrusion block (305) is fixedly mounted on the outer wall of the spring plate (304), the extrusion block (305) extends out of the contraction groove (303), and a symmetrically arranged inclined surface is provided on the top of the extrusion block (305); Two supporting platforms (201) are fixedly mounted on the outer ring wall of the positioning bracket (2), and the mounting positions of the two supporting platforms (201) are staggered with each other. Both supporting platforms (201) are provided with an adjusting slot (202), an adjusting slider (203) is slidably mounted in the adjusting slot (202), a connecting shaft (204) is rotatably mounted on the adjusting slider (203), one end of the connecting shaft (204) extends out of the adjusting slot (202) and is fixedly mounted with an adjusting telescopic rod (205), and a splicing unit (4) is fixedly mounted on the telescopic end of the adjusting telescopic rod (205).

2. A micro DC motor terminal spot welding device according to claim 1, characterized in that: Two symmetrically arranged positioning rods (306) are fixedly installed at both ends of the positioning module (3) and located outside the plug-in rod (302); a positioning telescopic rod (307) is inserted at one end of the positioning rod (306) away from the plug-in rod (302); a positioning shaft (308) is rotatably installed at one end of the positioning telescopic rod (307) away from the positioning rod (306); and one end of the positioning shaft (308) is in a conical structure.

3. A micro DC motor terminal spot welding device according to claim 1, characterized in that: The splicing unit (4) is composed of two splicing frames (401), the splicing frames (401) are in an L-shaped curved structure, the installation directions of the two splicing frames (401) are arranged in opposite directions to each other, a plurality of connecting telescopic rods (402) are arranged between the two splicing frames (401), the two ends of the connecting telescopic rods (402) are respectively inserted into the two splicing frames (401), and one of the two splicing frames (401) is fixedly connected to the telescopic end of the adjusting telescopic rod (205).

4. A micro DC motor terminal spot welding device according to claim 3, characterized in that: A splicing groove (403) is provided on one side of the splicing frame (401); a plurality of evenly distributed spring sheets (404) are fixedly mounted on the inner wall of the splicing groove (403); the spring sheets (404) are in an L-shaped curved structure; a rubber strip is fixedly mounted on the inner wall of the splicing groove (403) and on a side away from the spring sheets (404); and the installation positions of the spring sheets (404) and the rubber strips on the inner walls of the splicing grooves (403) on the two splicing frames (401) are staggered with each other.

5. A micro DC motor terminal spot welding device according to claim 1, characterized in that: A plurality of through slots (206) are provided on the telescopic end of the adjustable telescopic rod (205), the through slots (206) passing through the telescopic end of the adjustable telescopic rod (205), a rotating shaft (207) is rotatably mounted on the inner wall of the through slot (206), and an extrusion strip (208) with an arc-shaped structure is fixedly mounted on the rotating shaft (207).

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