Rotary main body of inside and outside saddle joint welding machine

Abstract

The present application belongs to the technical field of automatic electric welding machine, and discloses a rotating main body of inner and outer saddle joint welding machine, which comprises a three-jaw chuck, a center fixed spindle assembly, a driving box assembly and a main slip ring assembly. The positive claw of the three-jaw chuck is inwardly retracted to clamp and fix the tail end of the center spindle provided in the center fixed spindle assembly. The driving box assembly is rotatably connected with the center spindle through the top bearing and the bottom bearing provided therein. The main slip ring assembly is fixed on the top of the driving box assembly and is slidably connected with the T-shaped conductive sleeve provided in the center fixed spindle assembly through the main slip ring copper shoe provided in the main slip ring assembly. The present application can fix the welding machine rotating main body in the pipeline according to the needs of the inner and outer saddle joint welding interface to complete the welding requirement of the outer intersection joint of the inner and outer saddle joints.

Description

Technical Field

[0001] This invention relates to the field of automatic welding machine technology, specifically to a rotating body for an internal and external saddle-mouth welding machine. Background Technology

[0002] Electric welding machines use electrical energy, instantly converting it into heat energy. They are widely used in various fields, including for welding intersecting seams in large pipelines, due to their simple operation, ease of use, and strong welds. However, due to the limitations of their working principle, most electric welding machines currently in use are quite bulky and unsuitable for certain specific work scenarios, such as welding intersecting seams in large pipelines, especially for welding internal and external saddle-shaped seams. In such scenarios, the welding machine needs to be flexibly placed within the confined space of the internal and external saddle-shaped pipe joints to perform welding. Existing welding machines are not suitable for these types of work scenarios. Summary of the Invention

[0003] The purpose of this invention is to provide a rotating body for an internal and external saddle joint welding machine to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a rotating body for an internal and external saddle-shaped welding machine, comprising a three-jaw chuck, a central fixed spindle assembly, a drive box assembly, and a main slip ring assembly. The three-jaw chuck's positive jaws retract inward to clamp and fix the tail end of the central spindle provided in the central fixed spindle assembly. The drive box assembly is rotatably connected to the central spindle via a top bearing and a bottom bearing. The main slip ring assembly is fixed to the top of the drive box assembly and is slidably connected to a T-shaped conductive sleeve provided in the central fixed spindle assembly via a main slip ring copper bushing provided in the main slip ring assembly.

[0005] The central fixed spindle assembly includes a central spindle, a driven gear, a main slip ring inverted T-shaped insulating sleeve, a T-shaped conductive sleeve, a washer on the main slip ring insulating sleeve, a gasket on the conductive sleeve, a lower positioning nut, an output wiring flange, an upper positioning nut, a top wire lug slip ring connecting piece, a cable terminal, and an aviation socket. The central spindle passes through the driven gear, the main slip ring inverted T-shaped insulating sleeve, the T-shaped conductive sleeve, the washer on the main slip ring insulating sleeve, the gasket on the conductive sleeve, the lower positioning nut, the output wiring flange, and the upper positioning nut in sequence from bottom to top. The driven gear is keyed and fixed to the central spindle. The lower positioning nut and the upper positioning nut are threaded to the central spindle. The T-shaped conductive sleeve is fitted on the outer surface of the main slip ring inverted T-shaped insulating sleeve. The cable terminal and the aviation socket are fixed to the output wiring flange. The lower end of the cable terminal is fixedly connected to the top wire lug slip ring connecting piece, and the lower end of the top wire lug slip ring connecting piece is fixedly connected to the upper part of the T-shaped conductive sleeve.

[0006] The drive box assembly includes a top bearing, a bottom bearing, a drive box, a rotary stepper motor, a rotary worm gear reducer, a drive shaft, a drive gear, a rotary driver, and a stepper motor controller. The top bearing is located at the top of the drive box, and the bottom bearing is located at the bottom of the drive box. The rotary stepper motor and the rotary worm gear reducer are evenly arranged on the bottom plate of the drive box. The output shaft of the rotary stepper motor is fixedly connected to the input end of the worm shaft in the rotary worm gear reducer. The drive gear is keyed and fixed to the drive shaft. The top end of the drive shaft is rotatably connected to the drive bearing mounted on the top of the drive box, and the bottom end of the drive shaft is fixedly connected to the worm output shaft in the rotary worm gear reducer. The drive gear and the driven gear are connected and linked by a ring chain. The rotary driver is located next to the rotary stepper motor and fixed to the inner surface of the bottom plate of the drive box. The stepper motor controller is located on the drive box. The output end of the stepper motor controller is electrically connected to the input end of the rotary driver, and the output end of the rotary driver is electrically connected to the terminal of the rotary stepper motor.

[0007] Furthermore, in order to prevent the drive box from shifting position after rotating to the working position, the drive box assembly also includes a top locking handwheel, which is fixedly connected to the main shaft of the rotary stepper motor.

[0008] Furthermore, in order to adjust the tension of the annular chain belt between the driving gear and the driven gear, the drive box assembly also includes a tension gear assembly, which is located inside the drive box, and the gear of the tension gear assembly is meshed with the annular chain belt.

[0009] The tensioning gear assembly includes a support arm swing shaft, a lower support arm, an upper support arm, a support arm connecting block, an idler pin, an idler wheel, an idler wheel bearing, and an adjusting screw. The lower end of the support arm swing shaft is fixed to the inner surface of the drive box bottom plate. It passes through the lower support arm and the upper support arm sequentially from bottom to top and is rotatably connected to the lower support arm and the upper support arm. The support arm connecting block is located between the lower support arm and the upper support arm and is fixed. The idler wheel bearing is located on the outer end face of the lower support arm and the upper support arm. The idler wheel pin is keyed in the middle to fix the idler wheel, and its two ends are rotatably connected to the idler wheel bearing. The adjusting screw penetrates the side of the drive box from the external thread and abuts against the side of the support arm connecting block.

[0010] Furthermore, to prevent the idler wheel from swinging up and down during rotation, the tensioning gear assembly also includes a support arm swing shaft limiting sleeve, which is sleeved on the upper part of the support arm swing shaft above the upper support arm, and the top end of the support arm swing shaft limiting sleeve abuts against the inner surface of the drive box top plate.

[0011] The main slip ring assembly includes a core tube fixing nut, 18-way conductive rotating slip rings, a main slip ring copper bushing, an insulating fixing post, and conductive slip ring shims. The central spindle passes through the core tube fixing nut, 18-way conductive rotating slip rings, a main slip ring inverted T-shaped insulating sleeve, a main slip ring copper bushing, and a T-shaped conductive sleeve sequentially from bottom to top. The core tube fixing nut is located above the bottom bearing and is threadedly connected and fixed to the central spindle. The 18-way conductive rotating slip rings are fixedly connected to the corresponding conductive slip ring shims via bottom supports on both sides. The conductive slip ring shims are fixed to the outer surface of the drive box top plate. On the surface, the main slip ring copper plate is divided into symmetrical semi-circular arc pieces, with grooves at the upper and lower ends to place spring rings to hold tightly on the outer surface of the T-shaped conductive sleeve. There are gaps between the main slip ring copper plates. The insulating fixing posts are symmetrically distributed on both sides of the 18-way conductive rotating slip ring, with protrusions on their upper inner surfaces. The protrusions are inserted into the gaps between the main slip ring copper plates. The 18-way conductive rotating slip ring is rotatably connected to the central main shaft. The input end of the 18-way conductive rotating slip ring is electrically connected to the output end of the aviation socket, and the output end is electrically connected to the input end of the stepper motor controller.

[0012] Compared with the prior art, the present invention can fix the rotating body of the welding machine inside the pipe to complete the welding requirements of the intersecting seam of the inner and outer saddle joints according to the needs of the welding joint of the inner and outer saddle joints. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the structure of the present invention; Figure 2 A schematic diagram showing the structural relationship between the drive box assembly housing and the central spindle. Figure 3 Schematic diagram of the centrally fixed spindle assembly structure; Figure 4 Exploded view of the centrally fixed spindle assembly; Figure 5 This is one of the three-dimensional structural diagrams of the drive box assembly; Figure 6 This is the second schematic diagram of the main three-dimensional structure of the drive box assembly; Figure 7 This is a schematic diagram of the tensioning gear assembly structure; Figure 8 This is an exploded view of the tensioning gear assembly structure. Figure 9 A schematic diagram of the main slip ring assembly; Figure 10 This is an exploded view of the main slip ring assembly structure. Detailed Implementation

[0014] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings, but this is not intended to limit the scope of the invention.

[0015] Figures 1 to 10 A rotating body for an internal and external saddle welder is shown, comprising a three-jaw chuck 1, a central fixed spindle assembly 2, a drive box assembly 3, and a main slip ring assembly 4. The three-jaw chuck 1 retracts its front jaws to clamp and fix the tail end of the central spindle 21 provided in the central fixed spindle assembly 2. The drive box assembly 3 is rotatably connected to the central spindle 21 through a top bearing 31 and a bottom bearing 32. The main slip ring assembly 4 is fixed to the top of the drive box assembly 3 and is slidably connected to the T-shaped conductive sleeve 24 provided in the central fixed spindle assembly 2 through the main slip ring copper tile 43 provided in the main slip ring assembly 4.

[0016] like Figure 3 , Figure 4 As shown, the central fixed spindle assembly 2 includes a central spindle 21, a driven gear 22, a main slip ring inverted T-shaped insulating sleeve 23, a T-shaped conductive sleeve 24, a washer 25 on the main slip ring insulating sleeve, a washer 26 on the conductive sleeve, a lower positioning nut 27a, an output wiring flange 28, a upper positioning nut 27b, a top wire lug slip ring connecting piece 29a, a cable terminal 29b, and an aviation socket 29c. The central spindle 21 passes sequentially from bottom to top through the driven gear 22, the main slip ring inverted T-shaped insulating sleeve 23, the T-shaped conductive sleeve 24, the washer 25 on the main slip ring insulating sleeve, the washer 26 on the conductive sleeve, and the lower positioning nut 27a. 7a. Output wiring flange 28, positioning nut 27b, driven gear 22 is keyed and fixed to the central spindle 21, positioning nut 27a and positioning nut 27b are threaded to the central spindle 21, T-shaped conductive sleeve 24 is fitted on the outer surface of the inverted T-shaped insulating sleeve 23 of the main slip ring, cable terminal 29b and aviation socket 29c are fixed on the output wiring flange 28, the lower end of cable terminal 29b is fixedly connected to the top wire lug slip ring connecting piece 29a, and the lower end of the top wire lug slip ring connecting piece 29a is fixedly connected to the upper part of the T-shaped conductive sleeve 24.

[0017] like Figure 2 , Figure 5 , Figure 6As shown, the drive box assembly 3 includes a top bearing 31, a bottom bearing 32, a drive box 33, a rotary stepper motor 34, a rotary worm gear reducer 35, a drive shaft 36, a drive gear 37, a rotary driver 38, and a stepper motor controller 39. The top bearing 31 is located at the top of the drive box 33, and the bottom bearing 32 is located at the bottom of the drive box 33. The rotary stepper motor 34 and the rotary worm gear reducer 35 are evenly arranged on the bottom plate of the drive box 33. The output shaft of the rotary stepper motor 34 is fixedly connected to the input end of the worm shaft in the rotary worm gear reducer 35. The drive gear 37 is keyed and fixed to the drive shaft. On shaft 36, the top end of the drive shaft 36 is rotatably connected to the drive bearing 33a mounted on the top of the drive box 33, and the bottom end of the drive shaft 36 is fixedly connected to the worm gear output shaft inside the rotary worm gear reducer 35. The drive gear 37 and the driven gear 22 are connected and linked by a ring chain belt. The rotary driver 38 is located next to the rotary stepper motor 34 and fixed on the inner surface of the bottom plate of the drive box 33. The stepper motor controller 39 is located on the drive box 33. The output terminal of the stepper motor controller 39 is electrically connected to the input terminal of the rotary driver 38, and the output terminal of the rotary driver 38 is electrically connected to the terminal of the rotary stepper motor 34.

[0018] Furthermore, in order to prevent the drive box 33 from shifting position after rotating to the working position, the drive box assembly 3 also includes a top locking handwheel 39, which is fixedly connected to the main shaft of the rotary stepper motor 34.

[0019] like Figure 7 , Figure 8 As shown, further, in order to adjust the tension of the annular chain belt between the driving gear 37 and the driven gear 22, the drive box assembly 3 also includes a tension gear assembly 3a. The tension gear assembly 3a is located inside the drive box 33, and the gear of the tension gear assembly 3a is meshed with the annular chain belt.

[0020] The tensioning gear assembly 3a includes a support arm swing shaft 3a1, a lower support arm 3a2, an upper support arm 3a3, a support arm connecting block 3a4, an idler pin 3a5, an idler wheel 3a6, an idler wheel bearing 3a7, and an adjusting screw 3a8. The lower end of the support arm swing shaft 3a1 is fixed to the inner surface of the bottom plate of the drive box 33. It passes through the lower support arm 3a2 and the upper support arm 3a3 sequentially from bottom to top and is rotatably connected to the lower support arm 3a2 and the upper support arm 3a3. The support arm connecting block 3a4 is located between the lower support arm 3a2 and the upper support arm 3a3 and is fixed. The idler wheel bearing 3a7 is located on the outer end face of the lower support arm 3a2 and the upper support arm 3a3. The idler wheel pin 3a5 is keyed in the middle to fix the idler wheel 3a6, and its two ends are rotatably connected to the idler wheel bearing 3a7. The adjusting screw 3a8 penetrates the side of the drive box 33 from the external thread and abuts against the side of the support arm connecting block 3a4.

[0021] Furthermore, to prevent the idler wheel 3a6 from swinging up and down during rotation, the tensioning gear assembly 3a also includes a support arm swing shaft limiting sleeve 3a9. The support arm swing shaft limiting sleeve 3a9 is fitted on the upper part of the support arm swing shaft 3a1 above the upper support arm 3a3, and the top of the support arm swing shaft limiting sleeve 3a9 abuts against the inner surface of the top plate of the drive box 33.

[0022] like Figure 9 , Figure 10 As shown, the main slip ring assembly 4 includes a core tube fixing nut 41, an 18-way conductive rotating slip ring 42, a main slip ring copper bushing 43, an insulating fixing post 44, and a conductive slip ring pad 45. The central spindle 21 passes through the core tube fixing nut 41, the 18-way conductive rotating slip ring 42, the main slip ring inverted T-shaped insulating sleeve 23, the main slip ring copper bushing (43), and the T-shaped conductive sleeve 24 sequentially from bottom to top. The core tube fixing nut 41 is located above the bottom bearing 32 and is threadedly connected and fixed to the central spindle 21. The 18-way conductive rotating slip ring 42 is fixedly connected to the corresponding conductive slip ring pad 45 through bottom support feet 42a provided on both sides. The conductive slip ring pad 45 is fixed... Fixed on the outer surface of the top plate of the drive box 33, the main slip ring copper tile 43 is divided into symmetrical semi-circular arc pieces. The upper and lower ends of the main slip ring copper tile 43 are provided with grooves to place spring rings to hold tightly on the outer surface of the T-shaped conductive sleeve 24. There are gaps between the main slip ring copper tiles 43. The insulating fixing posts 44 are symmetrically distributed on both sides of the 18-way conductive rotating slip ring 42. The upper inner surface of the post is provided with a protrusion 44a. The protrusion 44a is inserted into the gap between the main slip ring copper tiles 43. The 18-way conductive rotating slip ring 42 is rotatably connected to the central spindle 21. The input end of the 18-way conductive rotating slip ring 42 is electrically connected to the output end of the aviation socket 29c. The output end is electrically connected to the input end of the stepper motor controller 39.

[0023] Working principle of this invention: Figures 1 to 10As shown, when the present invention is ready to operate, the positive jaw of the three-jaw chuck 1 first retracts inward to clamp and fix the tail end of the central spindle 21 provided in the central fixed spindle assembly 2. The negative jaw of the three-jaw chuck 1 expands and fixes the inner diameter of the tube workpiece. After entering the working state, the control signal sequentially enters the rotary driver 38 through the aviation socket 29c, the 18-channel conductive rotating slip ring 42, and the stepper motor controller 39. The rotary driver 38 controls the rotary stepper motor 34 to start running, driving the rotary worm gear reducer 35 to output rotation. The driving gear 37 rotates and is linked with the driven gear 22 through the ring chain. Since the central spindle 21 is fixed by the three-jaw chuck 1 and cannot rotate, the driving gear 37 rotates around the driven gear 22, thereby driving the drive box 33 to rotate around the central spindle 21. At the same time, since the insulating fixing post 44 is fixed on the drive box 33, the insulating fixing post 44 also rotates around the central spindle 21 along with the drive box 33. The protrusion 44a of the insulating fixing post 44 also drives the main slip ring copper tile 43 to rotate against the outer surface of the T-shaped conductive sleeve 24, thereby ensuring that the main current transmitted along the cable terminal 29b, the top wire lug slip ring connecting piece 29a, and the T-shaped conductive sleeve 24 can be smoothly transmitted to the welding torch through the main slip ring copper tile 43 without the main current transmission line tangling due to rotation.

[0024] Compared with the prior art, the present invention can fix the rotating body of the welding machine inside the pipe to complete the welding requirements of the intersecting seam of the inner and outer saddle joints according to the needs of the welding joint of the inner and outer saddle joints.

[0025] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations to these embodiments without departing from the principles and spirit of the present invention still fall within the protection scope of the present invention.

Claims

1. A rotating body for an internal and external saddle joint welding machine, characterized in that, The assembly includes a three-jaw chuck (1), a central fixed spindle assembly (2), a drive box assembly (3), and a main slip ring assembly (4). The three-jaw chuck (1) retracts its front jaws to clamp and fix the tail end of the central spindle (21) provided in the central fixed spindle assembly (2). The drive box assembly (3) is rotatably connected to the central spindle (21) through a top bearing (31) and a bottom bearing (32). The main slip ring assembly (4) is fixed on the top of the drive box assembly (3) and is slidably connected to the T-shaped conductive sleeve (24) provided in the central fixed spindle assembly (2) through the main slip ring copper tile (43) provided in the main slip ring assembly (4).

2. The rotating body of the internal and external saddle joint welding machine according to claim 1, characterized in that, The central fixed spindle assembly (2) includes a central spindle (21), a driven gear (22), a main slip ring inverted T-shaped insulating sleeve (23), a T-shaped conductive sleeve (24), a washer (25) on the main slip ring insulating sleeve, a washer (26) on the conductive sleeve, a positioning nut (27a), an output wiring flange (28), a positioning nut (27b), a top wire lug slip ring connecting piece (29a), a cable terminal (29b), and an aviation socket (29c). The central spindle (21) passes through the driven gear (22), the main slip ring inverted T-shaped insulating sleeve (23), the T-shaped conductive sleeve (24), the washer (25) on the main slip ring insulating sleeve, the washer (26) on the conductive sleeve, the positioning nut (27a), and the output wiring flange (28). The flange (28), the positioning nut (27b), the driven gear (22) and the central spindle (21) are keyed and fixed, the positioning nut (27a) and the positioning nut (27b) are threaded and connected to the central spindle (21), the T-shaped conductive sleeve (24) is sleeved on the outer surface of the inverted T-shaped insulating sleeve (23) of the main slip ring, the cable terminal (29b) and the aviation socket (29c) are fixed on the output wiring flange (28), the lower end of the cable terminal (29b) is fixedly connected to the top wire lug slip ring connecting piece (29a), and the lower end of the top wire lug slip ring connecting piece (29a) is fixedly connected to the upper part of the T-shaped conductive sleeve (24).

3. The rotating body of the internal and external saddle joint welding machine according to claim 2, characterized in that, The drive box assembly (3) includes a top bearing (31), a bottom bearing (32), a drive box (33), a rotary stepper motor (34), a rotary worm gear reducer (35), a drive shaft (36), a drive gear (37), a rotary driver (38), and a stepper motor controller (39). The top bearing (31) is located at the top of the drive box (33), and the bottom bearing (32) is located at the bottom of the drive box (33). The rotary stepper motor (34) and the rotary worm gear reducer (35) are evenly arranged on the bottom plate of the drive box (33). The output shaft of the rotary stepper motor (34) is fixedly connected to the input end of the worm shaft in the rotary worm gear reducer (35). The drive gear (37) is keyed and fixed to the drive shaft. On (36), the top end of the drive shaft (36) is rotatably connected to the drive bearing (33a) mounted on the top of the drive box (33), the bottom end of the drive shaft (36) is fixedly connected to the worm gear output shaft inside the rotary worm gear reducer (35), the drive gear (37) and the driven gear (22) are connected and linked by a ring chain belt, the rotary driver (38) is located next to the rotary stepper motor (34) and fixed on the inner surface of the bottom plate of the drive box (33), the stepper motor controller (39) is located on the drive box (33), the output end of the stepper motor controller (39) is electrically connected to the input end of the rotary driver (38), and the output end of the rotary driver (38) is electrically connected to the terminal of the rotary stepper motor (34).

4. The rotating body of the internal and external saddle joint welding machine according to claim 3, characterized in that, The drive box assembly (3) also includes a top locking handwheel (39), which is fixedly connected to the main shaft of the rotary stepper motor (34).

5. The rotating body of the internal and external saddle joint welding machine according to claim 3, characterized in that, The drive box assembly (3) further includes a tension gear assembly (3a), which is located inside the drive box (33), and the gear of the tension gear assembly (3a) meshes with the annular chain belt.

6. The rotating body of the internal and external saddle joint welding machine according to claim 5, characterized in that, The tensioning gear assembly (3a) includes a support arm swing shaft (3a1), a lower support arm (3a2), an upper support arm (3a3), a support arm connecting block (3a4), an idler wheel pin (3a5), an idler wheel (3a6), an idler wheel bearing (3a7), and an adjusting screw (3a8). The lower end of the support arm swing shaft (3a1) is fixed to the inner surface of the bottom plate of the drive box (33). It passes through the lower support arm (3a2) and the upper support arm (3a3) sequentially from bottom to top and is rotatably connected to the lower support arm (3a2) and the upper support arm (3a3). The support arm connecting block... (3a4) is located between the lower support arm (3a2) and the upper support arm (3a3) and is connected and fixed to the lower support arm (3a2) and the upper support arm (3a3). The idler bearing (3a7) is respectively located on the outer end face of the lower support arm (3a2) and the upper support arm (3a3). The idler pin (3a5) is keyed in the middle to fix the idler (3a6), and both ends are rotatably connected to the idler bearing (3a7). The adjusting screw (3a8) penetrates the side of the drive box (33) from the external thread and abuts against the side of the support arm connecting block (3a4).

7. The rotating body of the internal and external saddle joint welding machine according to claim 6, characterized in that, The tensioning gear assembly (3a) also includes a support arm swing shaft limiting sleeve (3a9), which is sleeved on the upper part of the support arm swing shaft (3a1) above the upper support arm (3a3), and the top end of the support arm swing shaft limiting sleeve (3a9) abuts against the inner surface of the top plate of the drive box (33).

8. The rotating body of the internal and external saddle joint welding machine according to claim 3, characterized in that, The main slip ring assembly (4) includes a core tube fixing nut (41), an 18-way conductive rotating slip ring (42), a main slip ring copper bushing (43), an insulating fixing post (44), and a conductive slip ring shim (45). The central spindle (21) passes through the core tube fixing nut (41), the 18-way conductive rotating slip ring (42), the main slip ring inverted T-shaped insulating sleeve (23), the main slip ring copper bushing (43), and the T-shaped conductive sleeve (24) sequentially from bottom to top. The core tube fixing nut (41) is located above the bottom bearing (32) and is threadedly connected and fixed to the central spindle (21). The 18-way conductive rotating slip ring (42) is fixedly connected to the corresponding conductive slip ring shim (45) through bottom support feet (42a) on both sides. The conductive slip ring shim (45) is fixed on the core tube fixing nut (41), the 18-way conductive rotating slip ring (42) is connected to the corresponding conductive slip ring shim (45) through bottom support feet (42a) on both sides. On the outer surface of the top plate of the drive box (33), the main slip ring copper tile (43) is divided into symmetrical semi-circular arc pieces. The upper and lower ends of the pieces are provided with grooves to place spring rings to hold the outer surface of the T-shaped conductive sleeve (24). There are gaps between the main slip ring copper tiles (43). The insulating fixing posts (44) are symmetrically distributed on both sides of the 18-way conductive rotating slip ring (42). The upper inner surface of the posts is provided with protrusions (44a). The protrusions (44a) are inserted into the gaps between the main slip ring copper tiles (43). The 18-way conductive rotating slip ring (42) is rotatably connected to the central spindle (21). The input end of the 18-way conductive rotating slip ring (42) is electrically connected to the output end of the aviation socket (29c). The output end is electrically connected to the input end of the stepper motor controller (39).

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