A sensor spot welding device

Abstract

The present invention discloses a sensor spot welding device, which belongs to the field of sensor welding technology, including a base device, a welding device and a push-out device are arranged on the base device, the welding device is used to spot weld the sensor housing and the sensor end cover, and the push-out device is used to push out the sensor end cover. The base device arranged in the present invention can drive three spot welding mechanisms to move at the same time, and drive the push-out device to move at the same time, when the photoelectric sensor detects the sensor housing, the motor rotates one circle, drives the inner rotating block to rotate one circle, realizes that the push-out block returns to the initial position after being pushed out once, and at the same time the track wheel rotates half a circle, and the welding gun is reset after descending once, with a high degree of automation; the three spot welding mechanisms act synchronously, and are quickly lifted up under the action of the sliding column spring after the spot welding is completed, and due to the arrangement of the bracket, when the sensor end cover is pushed out, if the sensor housing is not fitted with the end of the bracket, the sensor housing will be pushed together by the push-out device to fit with the bracket, and the docking accuracy is high.

Description

Technical Field

[0001] The invention relates to the technical field of sensor welding, and in particular to a sensor spot welding device. Background Art

[0002] During the production process of the sensor, the sensor housing and the sensor end cap need to be welded. The welding of the sensor housing and the sensor end cap is a key step to ensure that the sensor assembly is fully encapsulated and has good protection performance. This process involves connecting the housing part of the sensor with the end cap part through welding technology. The housing and the end cap need to be accurately aligned to ensure the correct welding position. A welding gun is used to apply pressure at the welding point and heat it with electricity. It is suitable for welding thin metal materials and is often used in large-scale production. It is widely used in various industrial and consumer electronic products, such as automotive sensors, environmental monitoring sensors, medical equipment sensors, etc. The welding of the sensor housing and the end cap in the prior art is mainly performed manually with an automatic welding machine, which has high labor intensity, low automation intensity, and requires control through multiple power sources. Summary of the invention

[0003] In view of the above technical problems, the technical solution adopted by the present invention is: a sensor spot welding device, including a base device, the base device includes a bottom plate, a fixing ring is fixedly installed on the bottom plate, a welding device and a pushing device are arranged on the base device, the welding device includes a welding frame, the welding frame is fixedly installed on the bottom plate, the welding device is used to spot weld the sensor housing and the sensor end cover, the pushing device includes a placement slot frame, the placement slot frame is fixedly installed on the fixing ring, and the pushing device is used to push the sensor end cover out.

[0004] Furthermore, the base device includes a bracket fixedly mounted on the base plate, a photoelectric sensor is fixedly mounted on the bracket, the sensor housing is placed on the bracket, a motor is fixedly mounted on the base plate, a motor wheel is fixedly mounted on the motor shaft of the motor, the motor wheel is rotatably mounted on the base plate, an outer wheel and an upper wheel are rotatably mounted on the base plate, and a transmission belt is wrapped around the motor wheel, the outer wheel and the upper wheel.

[0005] Furthermore, a rotating mechanism is provided on the fixed ring, and the rotating mechanism includes a rotating gear ring rotatably mounted on the fixed ring, friction wheels are fixedly mounted on the outer wheel and the motor wheel respectively, friction teeth are provided on the surface of the friction wheel, friction teeth are provided on the outer surface of the rotating gear ring, and the rotating gear ring and the friction wheel form a friction transmission, three inner bevel gears are rotatably mounted on the fixed ring, an inner gear is fixedly mounted on the inner bevel gear, and the inner gear is meshed with the rotating gear ring.

[0006] Place the sensor housing on the bracket. When the photoelectric sensor detects the sensor housing, the motor starts to rotate, driving the motor wheel to rotate, thereby driving the upper wheel and the outer wheel to rotate through the transmission belt, thereby driving the friction wheel to rotate. The friction wheel rotation drives the rotating gear ring to rotate, thereby driving the three internal gears to rotate, thereby driving the three internal bevel gears to rotate.

[0007] Furthermore, the welding device includes three sets of spot welding mechanisms fixedly mounted on the welding frame, and the spot welding mechanism includes a fixed slide and a fixed rotating frame fixedly mounted on the welding frame, a sliding column is fixedly mounted on the fixed slide, a sliding frame is slidably mounted on the sliding column, a sliding column spring is arranged between the sliding frame and the fixed slide, a track wheel is rotatably mounted on the fixed rotating frame, a docking bevel gear is fixedly mounted on the track wheel, and the docking bevel gear is meshed with the inner bevel gear.

[0008] Furthermore, the track wheel is provided with a track groove, the track groove is provided with two inclined sections and two vertical sections, a guide ball is fixedly mounted on the sliding frame, and the guide ball slides in the track groove.

[0009] Furthermore, a clamping mechanism is provided on the sliding frame, and the clamping mechanism includes an inner trapezoidal block fixedly mounted on the sliding frame, an outer trapezoidal block is slidably mounted on the inner trapezoidal block, the outer trapezoidal block slides along the inclined surface of the inner trapezoidal block, a tightening bolt is rotatably mounted on the inner trapezoidal block, an internal thread is provided in the outer trapezoidal block, a threaded transmission is formed between the outer trapezoidal block and the tightening bolt, and the outer trapezoidal block is driven to slide along the inclined surface of the inner trapezoidal block by rotating the tightening bolt, and the welding gun is located between the inner trapezoidal block and the outer trapezoidal block, and is clamped by the inner trapezoidal block and the outer trapezoidal block.

[0010] Place the welding gun between the inner trapezoidal block and the outer trapezoidal block, adjust the position of the welding gun, then turn the tightening bolt to drive the outer trapezoidal block to slide along the inclined surface of the inner trapezoidal block, and clamp the welding gun through the inner trapezoidal block and the outer trapezoidal block.

[0011] The rotation of the inner bevel gear will drive the docking bevel gear to rotate, thereby driving the track wheel to rotate. As the track wheel rotates, it first drives the guide ball and the sliding frame to descend through the inclined section of the track groove, thereby driving the welding gun to descend, and the slide column spring is compressed, causing the welding gun to spot weld the sensor housing and the sensor end cover. Then the guide ball reaches the vertical section of the track groove. At this time, the slide column spring rebounds, driving the sliding frame to rise, and the welding gun is separated from the sensor housing and the sensor end cover. The outer wheel rotates one circle, driving the track wheel to rotate half a circle, so that the welding gun can be quickly lifted after being lowered once.

[0012] Furthermore, the ejection device includes an outer rotating block rotatably mounted on the base plate, an inner rotating block fixedly mounted on the upper wheel, a rotating member rotating block rotatably mounted on the inner rotating block, the rotating member rotating block and the outer rotating block are rotatably mounted, a rotating frame rotatably mounted on the rotating member rotating block, an intermediate rotating head rotatably mounted on the rotating frame, a rotating push rod fixedly mounted on the intermediate rotating head, a rotating head fixedly mounted on the rotating push rod, and a ejection block rotatably mounted on the rotating head.

[0013] Furthermore, a feeding mechanism is provided on the placement slot frame, and the feeding mechanism includes a fixed cylinder fixedly installed on the placement slot frame, a plurality of sensor end covers are placed in the placement slot frame, and a groove is provided in the placement slot frame, so that the sensor end cover can only slide into the fixed cylinder along the placement slot frame, and the ejection block is slidably installed with the fixed cylinder.

[0014] The rotation of the upper wheel drives the inner rotating block to rotate, thereby driving the rotating piece rotating block to rotate. At the same time, the outer rotating block rotates around the bottom plate, and the rotating piece rotating block drives the rotating frame to rotate, thereby driving the middle rotating head to rotate, thereby driving the pushing block to slide back and forth in the fixed cylinder by rotating the push rod and the rotating head, thereby pushing the sensor end cover in the fixed cylinder into contact with the sensor housing through the pushing block, and the welding gun descends to spot weld the sensor end cover and the sensor housing. When a sensor end cover is pushed out, the sensor end cover placed in the slot rack will slide down to the fixed cylinder in turn, waiting for the next push-out, and manually take out the spot-welded sensor housing and sensor end cover, and put in the next sensor housing to be welded. When the photoelectric sensor detects the sensor housing, the motor rotates one circle, driving the inner rotating block to rotate one circle, so that the pushing block returns to the initial position after being pushed out once, and at the same time the track wheel rotates half a circle, and the welding gun is reset after descending once.

[0015] Compared with the prior art, the present invention has the following beneficial effects: (1) the base device provided in the present invention can drive the three spot welding mechanisms to move at the same time, and drive the ejection device to move at the same time. When the photoelectric sensor detects the sensor housing, the motor rotates one circle, driving the inner rotating block to rotate one circle, so that the ejection block returns to the initial position after being pushed out once, and at the same time the track wheel rotates half a circle, and the welding gun is lowered once and reset, with a high degree of automation; (2) the three spot welding mechanisms provided in the present invention move synchronously, and spot welding is performed when the welding gun contacts the welding position of the sensor housing and the sensor end cover, and is quickly lifted up under the action of the slide spring after the spot welding is completed. Due to the setting of the bracket, when the sensor end cover is pushed out, if the sensor housing is not in contact with the end of the bracket, the sensor housing will be pushed together with the ejection device to be in contact with the bracket, and the docking accuracy is high; (3) the feeding mechanism provided in the present invention cooperates with the ejection device, so that every time a sensor end cover is pushed out, a sensor end cover placed in the slot rack will automatically fall out into the fixed cylinder, so as to realize automatic and continuous feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the overall structure of the present invention (placement state).

[0017] Figure 2 It is a schematic diagram of the overall structure of the present invention (spot welding state).

[0018] Figure 3 It is a schematic diagram of the structure of the base device of the present invention.

[0019] Figure 4 It is a schematic diagram of the structure of the rotating mechanism of the present invention.

[0020] Figure 5 The structure of the welding device of the present invention is shown in FIG. Figure 1 .

[0021] Figure 6 The structure of the welding device of the present invention is shown in FIG. Figure 2 .

[0022] Figure 7 The spot welding mechanism structure of the present invention is shown in FIG. Figure 1 .

[0023] Figure 8 It is a schematic diagram of the structure of the clamping mechanism of the present invention.

[0024] Fig. 9 The structure of the push device of the present invention is shown in FIG. Figure 1 .

[0025] Fig.10 The structure of the push device of the present invention is shown in FIG. Figure 2 .

[0026] Reference numerals: 101-bottom plate; 102-bracket; 103-sensor housing; 104-photoelectric sensor; 105-fixed ring; 106-rotating gear ring; 107-motor; 108-motor wheel; 109-outer wheel; 110-upper wheel; 111-transmission belt; 112-friction wheel; 113-inner bevel gear; 114-inner gear; 201-welding frame; 202-fixed slide; 203-fixed rotating frame; 204-sliding column; 205-sliding frame; 206-sliding Column spring; 207-track wheel; 208-inner trapezoidal block; 209-outer trapezoidal block; 210-welding gun; 211-jointing bevel gear; 212-guide ball; 213-tightening bolt; 214-track groove; 301-slot rack; 302-sensor end cover; 303-fixing cylinder; 304-ejection block; 305-rotating head; 306-rotating push rod; 307-middle rotating head; 308-rotating frame; 309-rotating piece rotating block; 310-outer rotating block; 311-inner rotating block. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings.

[0028] Example: Reference Figure 1-Figure 10 A sensor spot welding device includes a base device, the base device includes a base plate 101, a fixing ring 105 is fixedly installed on the base plate 101, a welding device and a pushing device are arranged on the base device, the welding device includes a welding frame 201, the welding frame 201 is fixedly installed on the base plate 101, the welding device is used to spot weld the sensor housing and the sensor end cover, the pushing device includes a placement slot frame 301, the placement slot frame 301 is fixedly installed on the fixing ring 105, and the pushing device is used to push the sensor end cover out.

[0029] like Figure 3 , Figure 4 As shown, the base device includes a bracket 102 fixedly mounted on a base plate 101, a photoelectric sensor 104 is fixedly mounted on the bracket 102, a sensor housing 103 is placed on the bracket 102, a motor 107 is fixedly mounted on the base plate 101, a motor wheel 108 is fixedly mounted on the motor shaft of the motor 107, the motor wheel 108 is rotatably mounted on the base plate 101, an outer wheel 109 and an upper wheel 110 are rotatably mounted on the base plate 101, and a transmission belt 111 is wrapped around the motor wheel 108, the outer wheel 109 and the upper wheel 110.

[0030] like Figure 3 , Figure 4 As shown, a rotating mechanism is provided on the fixed ring 105, and the rotating mechanism includes a rotating ring gear 106 rotatably mounted on the fixed ring 105, and friction wheels 112 are fixedly mounted on the outer wheel 109 and the motor wheel 108 respectively, and friction teeth are provided on the surface of the friction wheel 112, and friction teeth are provided on the outer surface of the rotating ring gear 106, and the rotating ring gear 106 and the friction wheel 112 form a friction transmission, and three inner bevel gears 113 are rotatably mounted on the fixed ring 105, and an inner gear 114 is fixedly mounted on the inner bevel gear 113, and the inner gear 114 is meshed with the rotating ring gear 106.

[0031] The sensor housing 103 is placed on the bracket 102. When the photoelectric sensor 104 detects the sensor housing 103, the motor 107 starts to rotate, driving the motor wheel 108 to rotate, thereby driving the upper wheel 110 and the outer wheel 109 to rotate through the transmission belt 111, thereby driving the friction wheel 112 to rotate, and the friction wheel 112 rotates to drive the rotating ring gear 106 to rotate, thereby driving the three internal gears 114 to rotate, thereby driving the three internal bevel gears 113 to rotate.

[0032] like Figure 5-Figure 8As shown, the welding device includes three sets of spot welding mechanisms fixedly installed on the welding frame 201, and the spot welding mechanism includes a fixed slide 202 and a fixed rotating frame 203 fixedly installed on the welding frame 201, a slide column 204 is fixedly installed on the fixed slide 202, a slide frame 205 is slidably installed on the slide column 204, a slide column spring 206 is arranged between the slide frame 205 and the fixed slide 202, a track wheel 207 is rotatably installed on the fixed rotating frame 203, a docking bevel gear 211 is fixedly installed on the track wheel 207, and the docking bevel gear 211 is meshed with the inner bevel gear 113.

[0033] like Figure 5-Figure 8 As shown, a track groove 214 is provided on the track wheel 207 , and the track groove 214 is provided with two inclined sections and two vertical sections. A guide ball 212 is fixedly mounted on the sliding frame 205 , and the guide ball 212 slides in the track groove 214 .

[0034] like Figure 5-Figure 8 As shown, a clamping mechanism is provided on the sliding frame 205, and the clamping mechanism includes an inner trapezoidal block 208 fixedly mounted on the sliding frame 205, an outer trapezoidal block 209 is slidably mounted on the inner trapezoidal block 208, the outer trapezoidal block 209 slides along the inclined surface of the inner trapezoidal block 208, a tightening bolt 213 is rotatably mounted on the inner trapezoidal block 208, an internal thread is provided in the outer trapezoidal block 209, the outer trapezoidal block 209 and the tightening bolt 213 form a threaded transmission, and the tightening bolt 213 is rotated to drive the outer trapezoidal block 209 to slide along the inclined surface of the inner trapezoidal block 208, and the welding gun 210 is located between the inner trapezoidal block 208 and the outer trapezoidal block 209, and is clamped by the inner trapezoidal block 208 and the outer trapezoidal block 209.

[0035] Place the welding gun 210 between the inner trapezoidal block 208 and the outer trapezoidal block 209, adjust the position of the welding gun 210, and then turn the tightening bolt 213 to drive the outer trapezoidal block 209 to slide along the inclined surface of the inner trapezoidal block 208, and clamp the welding gun 210 through the inner trapezoidal block 208 and the outer trapezoidal block 209.

[0036] The rotation of the inner bevel gear 113 will drive the docking bevel gear 211 to rotate, thereby driving the track wheel 207 to rotate. As the track wheel 207 rotates, it first drives the guide ball 212 and the sliding frame 205 to descend through the inclined section of the track groove 214, thereby driving the welding gun 210 to descend, and the slide column spring 206 is compressed, so that the welding gun 210 spot welds the sensor housing 103 and the sensor end cover 302. Then the guide ball 212 reaches the vertical section of the track groove 214. At this time, the slide column spring 206 rebounds, driving the sliding frame 205 to rise, and the welding gun 210 is separated from the sensor housing 103 and the sensor end cover 302. The outer wheel 109 rotates one circle, driving the track wheel 207 to rotate half a circle, so that the welding gun 210 is quickly lifted after being lowered once.

[0037] like Fig. 9, Fig.10 As shown, the ejection device includes an outer rotating block 310 rotatably mounted on the base plate 101, an inner rotating block 311 is fixedly mounted on the upper wheel 110, a rotating member rotating block 309 is rotatably mounted on the inner rotating block 311, the rotating member rotating block 309 is rotatably mounted with the outer rotating block 310, a rotating frame 308 is rotatably mounted on the rotating member rotating block 309, an intermediate rotating head 307 is rotatably mounted on the rotating frame 308, a rotating push rod 306 is fixedly mounted on the intermediate rotating head 307, a rotating head 305 is fixedly mounted on the rotating push rod 306, and a ejection block 304 is rotatably mounted on the rotating head 305.

[0038] like Fig. 9 , Fig.10 As shown, a feeding mechanism is arranged on the placement slot frame 301, and the feeding mechanism includes a fixed cylinder 303 fixedly installed on the placement slot frame 301, and a plurality of sensor end covers 302 are placed in the placement slot frame 301. A groove is arranged in the placement slot frame 301, so that the sensor end cover 302 can only slide into the fixed cylinder 303 along the placement slot frame 301, and the ejection block 304 is slidably installed with the fixed cylinder 303.

[0039] The upper wheel 110 rotates to drive the inner rotating block 311 to rotate, thereby driving the rotating member rotating block 309 to rotate. At the same time, the outer rotating block 310 rotates around the bottom plate 101, and the rotating member rotating block 309 drives the rotating frame 308 to rotate, thereby driving the intermediate rotating head 307 to rotate, thereby driving the push block 304 to slide back and forth in the fixed cylinder 303 by rotating the push rod 306 and the rotating head 305, so that the sensor end cover 302 in the fixed cylinder 303 is pushed out by the push block 304 until it contacts the sensor housing 103, and the welding gun 210 descends to spot weld the sensor end cover 302 and the sensor housing 103 When a sensor end cover 302 is pushed out, the sensor end cover 302 placed in the slot frame 301 will slide down into the fixed cylinder 303 in turn, waiting for the next push-out. The sensor housing 103 and the sensor end cover 302 that have been spot-welded are manually taken out, and the next sensor housing 103 to be welded is put in. When the photoelectric sensor 104 detects the sensor housing 103, the motor 107 rotates one circle, driving the inner rotating block 311 to rotate one circle, so that the push-out block 304 returns to the initial position after being pushed out once, and at the same time, the track wheel 207 rotates half a circle, and the welding gun 210 is reset after being lowered once.

[0040] The working principle of a sensor spot welding device disclosed in the present invention is as follows: a welding gun 210 is placed between the inner trapezoidal block 208 and the outer trapezoidal block 209, the position of the welding gun 210 is adjusted, and then the jacking bolt 213 is rotated to drive the outer trapezoidal block 209 to slide along the inclined surface of the inner trapezoidal block 208, and the welding gun 210 is clamped and fixed by the inner trapezoidal block 208 and the outer trapezoidal block 209. The sensor housing 103 is placed on the bracket 102, and when the photoelectric sensor 104 detects the sensor housing 103, the motor 107 starts to rotate and drives the motor wheel 108 to rotate, thereby driving the upper wheel 110 and the outer wheel 109 to rotate through the transmission belt 111, thereby driving the friction wheel 112 to rotate, and the friction wheel 112 rotates to drive the rotating gear ring 106 to rotate, thereby driving the three internal gears 114 to rotate, thereby driving the three internal bevel gears 113 to rotate. The rotation of the inner bevel gear 113 will drive the docking bevel gear 211 to rotate, thereby driving the track wheel 207 to rotate. As the track wheel 207 rotates, it first drives the guide ball 212 and the sliding frame 205 to descend through the inclined section of the track groove 214, thereby driving the welding gun 210 to descend, and the slide column spring 206 is compressed, so that the welding gun 210 spot welds the sensor housing 103 and the sensor end cover 302. Then the guide ball 212 reaches the vertical section of the track groove 214. At this time, the slide column spring 206 rebounds, driving the sliding frame 205 to rise, and the welding gun 210 is separated from the sensor housing 103 and the sensor end cover 302. The outer wheel 109 rotates one circle, driving the track wheel 207 to rotate half a circle, so that the welding gun 210 is quickly lifted after being lowered once. The upper wheel 110 rotates to drive the inner rotating block 311 to rotate, thereby driving the rotating member rotating block 309 to rotate. At the same time, the outer rotating block 310 rotates around the bottom plate 101, and the rotating member rotating block 309 drives the rotating frame 308 to rotate, thereby driving the intermediate rotating head 307 to rotate, thereby driving the push block 304 to slide back and forth in the fixed cylinder 303 by rotating the push rod 306 and the rotating head 305, so that the sensor end cover 302 in the fixed cylinder 303 is pushed out by the push block 304 until it contacts the sensor housing 103, and the welding gun 210 descends to spot weld the sensor end cover 302 and the sensor housing 103 When a sensor end cover 302 is pushed out, the sensor end cover 302 placed in the slot frame 301 will slide down into the fixed cylinder 303 in turn, waiting for the next push-out. The sensor housing 103 and the sensor end cover 302 that have been spot-welded are manually taken out, and the next sensor housing 103 to be welded is put in. When the photoelectric sensor 104 detects the sensor housing 103, the motor 107 rotates one circle, driving the inner rotating block 311 to rotate one circle, so that the push-out block 304 returns to the initial position after being pushed out once, and at the same time, the track wheel 207 rotates half a circle, and the welding gun 210 is reset after being lowered once.

[0041] 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 of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A sensor spot welding device, comprising a base device, characterized in that: The base device comprises a base plate (101), a fixing ring (105) is fixedly mounted on the base plate (101), a welding device and a pushing device are arranged on the base device, the welding device comprises a welding frame (201), the welding frame (201) is fixedly mounted on the base plate (101), the welding device is used to spot weld the sensor housing and the sensor end cover, the pushing device comprises a placement slot frame (301), the placement slot frame (301) is fixedly mounted on the fixing ring (105), and the pushing device is used to push the sensor end cover out; An outer wheel (109) and an upper wheel (110) are rotatably mounted on the bottom plate (101); The ejection device comprises an outer rotating block (310) rotatably mounted on the bottom plate (101), an inner rotating block (311) fixedly mounted on the upper wheel (110), a rotating member rotating block (309) rotatably mounted on the inner rotating block (311), the rotating member rotating block (309) and the outer rotating block (310) being rotatably mounted, a rotating frame (308) rotatably mounted on the rotating member rotating block (309), an intermediate rotating head (307) rotatably mounted on the rotating frame (308), a rotating push rod (306) fixedly mounted on the intermediate rotating head (307), a rotating head (305) fixedly mounted on the rotating push rod (306), and an ejection block (304) rotatably mounted on the rotating head (305); The placement slot frame (301) is provided with a feeding mechanism, and the feeding mechanism comprises a fixed cylinder (303) fixedly mounted on the placement slot frame (301), a plurality of sensor end covers (302) are placed in the placement slot frame (301), and a groove is provided in the placement slot frame (301), so that the sensor end covers (302) can only slide along the placement slot frame (301) into the fixed cylinder (303), and the push-out block (304) is slidably mounted with the fixed cylinder (303).

2. A sensor spot welding device according to claim 1, characterized in that: The base device comprises a bracket (102) fixedly mounted on a base plate (101), a photoelectric sensor (104) fixedly mounted on the bracket (102), a sensor housing (103) placed on the bracket (102), a motor (107) fixedly mounted on the base plate (101), a motor wheel (108) fixedly mounted on a motor shaft of the motor (107), the motor wheel (108) being rotatably mounted on the base plate (101), and a transmission belt (111) being wound around the motor wheel (108), the outer wheel (109) and the upper wheel (110).

3. A sensor spot welding device according to claim 2, characterized in that: The fixed ring (105) is provided with a rotating mechanism, the rotating mechanism comprising a rotating ring gear (106) rotatably mounted on the fixed ring (105), friction wheels (112) fixedly mounted on the outer wheel (109) and the motor wheel (108), respectively, the surface of the friction wheel (112) is provided with friction teeth, the outer surface of the rotating ring gear (106) is provided with friction teeth, the rotating ring gear (106) and the friction wheel (112) form a friction transmission, three inner bevel gears (113) are rotatably mounted on the fixed ring (105), an inner gear (114) is fixedly mounted on the inner bevel gear (113), and the inner gear (114) meshes with the rotating ring gear (106).

4. A sensor spot welding device according to claim 1, characterized in that: The welding device comprises three groups of spot welding mechanisms fixedly mounted on a welding frame (201), the spot welding mechanisms comprising a fixed slide (202) and a fixed rotating frame (203) fixedly mounted on the welding frame (201), a slide column (204) fixedly mounted on the fixed slide (202), a slide frame (205) slidably mounted on the slide column (204), a slide column spring (206) provided between the slide frame (205) and the fixed slide (202), a track wheel (207) rotatably mounted on the fixed rotating frame (203), a butt bevel gear (211) fixedly mounted on the track wheel (207), and the butt bevel gear (211) meshes with the inner bevel gear (113).

5. A sensor spot welding device according to claim 4, characterized in that: The track wheel (207) is provided with a track groove (214), and the track groove (214) is provided with two inclined sections and two vertical sections. A guide ball (212) is fixedly mounted on the sliding frame (205), and the guide ball (212) slides in the track groove (214).

6. A sensor spot welding device according to claim 5, characterized in that: The sliding frame (205) is provided with a clamping mechanism, and the clamping mechanism comprises an inner trapezoidal block (208) fixedly mounted on the sliding frame (205), an outer trapezoidal block (209) slidably mounted on the inner trapezoidal block (208), the outer trapezoidal block (209) slides along the inclined surface of the inner trapezoidal block (208), a tightening bolt (213) is rotatably mounted on the inner trapezoidal block (208), an inner thread is arranged inside the outer trapezoidal block (209), the outer trapezoidal block (209) and the tightening bolt (213) form a threaded transmission, and the tightening bolt (213) is rotated to drive the outer trapezoidal block (209) to slide along the inclined surface of the inner trapezoidal block (208), and the welding gun (210) is located between the inner trapezoidal block (208) and the outer trapezoidal block (209), and is clamped by the inner trapezoidal block (208) and the outer trapezoidal block (209).

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