Anti-corrosion treatment device for stainless steel corrugated pipe machining

Abstract

The stainless steel corrugated pipe machining anti-corrosion treatment device comprises a base, movable seats are arranged on the two sides of the inner surface of the base, a supporting frame is fixedly arranged in the middle of the upper surface of each movable seat, and a driving shaft is rotationally installed in the supporting frame and located at the longitudinal central axis position of the supporting frame through a bearing; a centering clamping mechanism for positioning and clamping the stainless steel corrugated pipe and a self-adaptive distance-adjusting spraying mechanism are arranged in the middle of the outer end of the driving shaft, and the self-adaptive distance-adjusting spraying mechanism comprises a guide rod frame fixedly arranged in the middle of the outer surface of the base. According to the device, the spraying distance is adjusted through the self-adaptive distance-adjusting spraying mechanism, the defect that the peak is thick and the valley is thin due to the wavy surface of the corrugated pipe is effectively overcome, it is ensured that a coating is evenly covered, the integrity and durability of an anti-corrosion layer are improved, a two-way screw drives a movable base to symmetrically move, and automatic centering clamping of a pipe fitting is achieved in cooperation with a centering clamping mechanism; manual operation is replaced, labor intensity is remarkably reduced, and machining efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of stainless steel bellows processing, and in particular to an anti-corrosion treatment device for stainless steel bellows processing. Background Art

[0002] A stainless steel bellows is a flexible pipe made of stainless steel material, which has a unique corrugated structure and good flexibility, corrosion resistance, high temperature resistance and wear resistance. It can be freely bent into various angles and radius of curvature, and is used to compensate for the deformation of the pipeline system caused by factors such as thermal expansion and contraction, displacement, vibration, etc., playing a role in vibration reduction and noise elimination. Stainless steel bellows are widely used in fields such as water supply and drainage, heating, ventilation and air conditioning, chemical industry, machinery manufacturing, automobile exhaust systems, etc., and are important components for connecting and fixing various pipeline systems.

[0003] The existing anti-corrosion treatment of stainless steel bellows mainly relies on manual spraying operations, with low operation efficiency and high labor intensity. Secondly, the unique wavy surface of the stainless steel bellows forms a periodic high-low drop structure, which may cause the staff to be unable to adjust the spraying distance in a timely manner according to this high-low drop, resulting in insufficient coating coverage in the concave area due to the too far distance between the nozzle and the surface, and paint accumulation in the convex part due to the too close distance, ultimately forming a non-uniform coating with "thick peaks and thin valleys", which is likely to affect the integrity and durability of the anti-corrosion layer. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the present invention proposes an anti-corrosion treatment device for stainless steel bellows processing.

[0005] To solve the above technical problems, the basic technical solution proposed by the present invention is as follows:

[0006] An anti-corrosion treatment device for stainless steel bellows processing, including a base, both sides of the inner surface of the base are provided with movable seats, and a support frame is fixedly arranged in the middle of the upper surface of the movable seat. And a driving shaft is rotatably installed through a bearing at the longitudinal central axis position inside the support frame. A centering and clamping mechanism for positioning and clamping the stainless steel bellows is arranged in the middle of the outer end of the driving shaft. It also includes: an adaptive distance-adjusting spraying mechanism for spraying the outer surface of the stainless steel bellows. The adaptive distance-adjusting spraying mechanism includes a guide rod frame fixedly arranged in the middle of the outer surface of the base, and a movable vertical plate arranged on the outer surface of the guide rod frame. It further includes a guide horizontal plate fixedly arranged in the middle of the upper end of the movable vertical plate, and a plurality of guide rails arranged at equal intervals and fixedly arranged on the outer surface of the guide horizontal plate and facing one side of the stainless steel bellows.

[0007] Preferably, a telescopic arm is elastically arranged inside the guide rail through a third spring, and the end of the telescopic arm is designed in a semi-circular structure. A paint collecting pipe is installed on the outer surface of the movable vertical plate. An atomizing nozzle is installed on the inner wall of the end of the telescopic arm, and a feeding hose is arranged at the inlet end of the atomizing nozzle. The outlet end of the feeding hose is connected to the inlet end of the atomizing nozzle, the inlet end of the feeding hose is connected to the outlet end of the paint collecting pipe, and the inlet end of the paint collecting pipe is connected to the outlet end of an external pump body.

[0008] Preferably, a forward sawtooth rack is fixedly arranged on the upper surface of the telescopic arm. A slider is arranged in the middle of the upper surface of the guiding cross plate. A transfer plate is fixedly arranged on the outer surface of the slider and opposite to one side of the guide rail. The end of the transfer plate is fixedly provided with a driving cross plate. Reverse sawtooth plates are arranged below the driving cross plate at the positions of each forward sawtooth rack, and the reverse sawtooth plates and the driving cross plate are elastically arranged through a second spring.

[0009] Preferably, a plurality of arm wheels are installed on both sides of the telescopic arm at equal intervals. The bottom of the slider is designed in an inverted T-shaped structure. A chute designed in an inverted T-shaped structure is formed on the upper surface of the guiding cross plate. The movable vertical plate and the guide rod frame are elastically arranged through a first spring. Vertical rods are fixedly arranged on the upper surface of the reverse sawtooth plate at the positions of each second spring. The reverse sawtooth plate and the forward sawtooth rack are slidably engaged.

[0010] Preferably, a second fixing key is fixedly arranged on the outer surface of the guiding cross plate near the slider. A first fixing key is fixedly arranged in the middle of the outer surface of the slider. A first electric telescopic rod is installed inside the guide rod frame. The output end of the first electric telescopic rod is connected and assembled with the outer end of the movable vertical plate. A second electric telescopic rod is installed on the upper surface of the guiding cross plate near the slider. The output end of the second electric telescopic rod is connected and assembled with the outer end of the slider.

[0011] Preferably, the centering clamping mechanism includes a circular plate, the circular plate is connected to the driving shaft. A plurality of receiving grooves are formed through the middle of the outer surface of the circular plate at equal intervals in a ring shape. A track rod is fixedly arranged inside the receiving groove. A driving block is elastically arranged on the outer surface of the track rod through a fourth spring. A spreading arm is fixedly arranged in the middle of the outer surface of the driving block facing away from the driving shaft. An anti-slip pad is fixedly arranged on the upper surface of the spreading arm.

[0012] Preferably, a lifting rack is fixedly arranged on the outer surface of the driving block and facing one end of the driving shaft. A transfer shaft is arranged on the outer surface of the circular plate near each lifting rack. A synchronous gear is rotatably installed on the outer surface of the transfer shaft through a bearing. A driving gear ring is rotatably arranged in the middle of the outer surface of the circular plate facing one end of the driving shaft. A plurality of positioning wheels arranged in an annular and equally spaced manner are installed in the middle of one end of the outer surface of the circular plate. A driving rod is rotatably installed at the bottom of the circular plate through a bearing. A driving gear is fixedly installed on the outer surface of the driving rod near one side of the driving gear ring. The outer end of the driving rod is connected and assembled with the output end of an external driving member through a coupling. The synchronous gear is meshed with the lifting rack, and each synchronous gear is meshed and driven with the driving gear ring. The driving gear is meshed and driven with the driving gear ring.

[0013] Preferably, the movable seat and the base are slidably arranged through a seat wheel. A bidirectional screw rod is rotatably installed in the middle of the transverse central axis of the base through a bearing. Guide rods are fixedly arranged on both sides of the inner surface of the base. A worm gear is installed on the outer surface of one of the driving shafts. A bearing seat is arranged at the bottom of the worm gear. A worm is rotatably installed in the bearing seat through a bearing. The outer end of the worm is connected and assembled with the output end of an external driving member through a coupling. Both movable seats are engaged with the bidirectional screw rod through threads. The outer end of the bidirectional screw rod is connected and assembled with the output end of an external driving member through a coupling. The bearing seat is connected to the support frame. The worm is meshed and driven with the worm gear.

[0014] The beneficial effects of the present invention are as follows:

[0015] The device adjusts the spraying distance through the adaptive distance-adjusting spraying mechanism, effectively solves the defect of "thick at the peak and thin at the valley" caused by the wavy surface of the corrugated pipe, ensures uniform coating coverage, improves the integrity and durability of the anti-corrosion layer. The bidirectional screw rod drives the symmetrical movement of the movable seat, and cooperates with the centering clamping mechanism to realize automatic centering clamping of the pipe fittings, replacing manual operation, significantly reducing the labor intensity and improving the processing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the overall structural schematic diagram of the present invention;

[0017] Figure 2 is the structural schematic diagram of the movable seat of the present invention;

[0018] Figure 3 is the structural schematic diagram of the circular plate of the present invention Figure 1 ;

[0019] Figure 4 is the structural schematic diagram of the circular plate of the present invention Figure 2 ;

[0020] Figure 5 Schematic structural diagram of the adaptive distance-adjusting spraying mechanism of the present invention Figure 1 ;

[0021] Figure 6 Schematic structural diagram of the adaptive distance-adjusting spraying mechanism of the present invention Figure 2 ;

[0022] Figure 7 Schematic structural diagram of the adaptive distance-adjusting spraying mechanism of the present invention Figure 3 。

[0023] Explanation of reference numerals:

[0024] 100, base; 101, movable seat; 102, bidirectional screw; 103, guide rod; 104, support frame; 105, drive shaft; 106, seat wheel; 107, bearing seat; 108, worm; 109, worm gear; 200, adaptive distance-adjusting spraying mechanism; 201, guide rod frame; 202, movable vertical plate; 203, guide horizontal plate; 204, first electric telescopic rod; 205, first spring; 206, slider; 207, adapter plate; 208, drive horizontal plate; 209, guide rail; 210, telescopic arm; 211, first fixing key; 212, second fixing key; 213, reverse serrated plate; 214, second spring; 215, vertical rod; 216, second electric telescopic rod; 217, third spring; 218, paint gathering pipe; 219, arm wheel; 220, atomizing nozzle; 221, forward serrated rack; 222, feeding hose; 300, centering clamping mechanism; 301, circular plate; 302, driving gear ring; 303, driving gear; 304, driving rod; 305, positioning wheel; 306, driving block; 307, adapter shaft; 308, synchronous gear; 309, track rod; 310, spreading arm; 311, anti-slip pad; 312, fourth spring; 313, lifting rack. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the attached drawings... Figure 1 to the attached drawings... Figure 7 Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without any creative work belong to the scope of protection of the present invention.

[0026] The present invention provides a technical solution: an anti-corrosion treatment device for processing stainless steel bellows, including a base 100. On both sides of the inner surface of the base 100, movable seats 101 are provided. The movable seats 101 and the base 100 are slidably arranged through seat wheels 106. In the middle of the upper surface of the movable seat 101, a support frame 104 is fixedly arranged. Inside the support frame 104 and at the position of the longitudinal central axis of the support frame 104, a driving shaft 105 is rotatably installed through a bearing. Inside the base 100 and at the position of the transverse central axis of the base 100, a bidirectional screw 102 is rotatably installed through a bearing. Both movable seats 101 are engaged with the bidirectional screw 102 through threads. The outer end of the bidirectional screw 102 is connected and assembled with the output end of an external driving member through a coupling. The driving member is a motor, which is not drawn and labeled in the attached drawings of the specification. As a prior art, it will not be elaborated here. On both sides of the inner surface of the base 100, guide rods 103 are fixedly arranged. On the outer surface of one of the driving shafts 105, a worm gear 109 is installed to drive the driving shaft 105 to rotate synchronously. At the bottom of the worm gear 109, a bearing seat 107 is provided. The bearing seat 107 is connected to the support frame 104. Inside the bearing seat 107, a worm 108 is rotatably installed through a bearing. The worm 108 is in meshing transmission with the worm gear 109. The outer end of the worm 108 is connected and assembled with the output end of an external driving member through a coupling. The principle of the driving member is the same as above. In this device, in the middle of the outer end of the driving shaft 105, a centering and clamping mechanism 300 for positioning and clamping the stainless steel bellows is provided. The two centering and clamping mechanisms 300 are corresponding in position. It further includes: an adaptive distance-adjusting spraying mechanism 200 for spraying the outer surface of the stainless steel bellows.

[0027] Specifically, the adaptive distance-adjustable spraying mechanism 200 includes a guide rod frame 201 fixedly arranged in the middle of the outer surface of the base 100, and a movable vertical plate 202 arranged on the outer surface of the guide rod frame 201. The movable vertical plate 202 and the guide rod frame 201 are elastically arranged through a first spring 205. A first electric telescopic rod 204 is installed inside the guide rod frame 201, and the output end of the first electric telescopic rod 204 is connected and assembled with the outer end of the movable vertical plate 202. The adaptive distance-adjustable spraying mechanism 200 further includes a guide cross plate 203 fixedly arranged in the middle of the upper end of the movable vertical plate 202. On the outer surface of the guide cross plate 203 and facing the side of the stainless steel bellows, a plurality of guide rails 209 arranged at equal intervals are fixedly arranged. A telescopic arm 210 is elastically arranged inside the guide rail 209 through a third spring 217. The end of the telescopic arm 210 is designed in a semicircular structure. A plurality of arm wheels 219 arranged at equal intervals are installed on both sides of the telescopic arm 210 to reduce the friction at the joint. A paint collecting pipe 218 is installed on the outer surface of the movable vertical plate 202. An atomizing nozzle 220 is installed on the inner wall of the end of the telescopic arm 210. A guide hose 222 is arranged at the inlet end of the atomizing nozzle 220. The outlet end of the guide hose 222 is connected to the inlet end of the atomizing nozzle 220, and the inlet end of the guide hose 222 is connected to the outlet end of the paint collecting pipe 218. The inlet end of the paint collecting pipe 218 is connected to the outlet end of an external pump body, and the pump body is used to transport the external paint into the paint collecting pipe 218.

[0028] Furthermore, a forward sawtooth rack 221 is fixedly arranged on the upper surface of the telescopic arm 210. A slider 206 is arranged in the middle of the upper surface of the guide cross plate 203. A second fixed key 212 is fixedly arranged on the outer surface of the guide cross plate 203 and near the slider 206. A first fixed key 211 is fixedly arranged in the middle of the outer surface of the slider 206 for cooperating with the second fixed key 212 to intercept the slider 206. A second electric telescopic rod 216 is installed on the upper surface of the guide cross plate 203 and near the slider 206. The output end of the second electric telescopic rod 216 is connected and assembled with the outer end of the slider 206. The bottom of the slider 206 is designed in an inverted T-shaped structure. A chute designed in an inverted T-shaped structure is opened on the upper surface of the guide cross plate 203. A transfer plate 207 is fixedly arranged on the outer surface of the slider 206 and facing the side of the guide rail 209, and a driving cross plate 208 is fixedly arranged at the end of the transfer plate 207. Below the driving cross plate 208 and at the positions of each forward sawtooth rack 221, a reverse sawtooth plate 213 is arranged for cooperating with the forward sawtooth rack 221 to brake the telescopic arm 210. The reverse sawtooth plate 213 and the driving cross plate 208 are elastically arranged through a second spring 214. Upright rods 215 are fixedly arranged on the upper surface of the reverse sawtooth plate 213 and at the positions of each second spring 214. The reverse sawtooth plate 213 and the forward sawtooth rack 221 are in sliding engagement.

[0029] Specifically, the centering clamping mechanism 300 includes a circular plate 301. The circular plate 301 is connected to the drive shaft 105. A plurality of storage grooves are formed through the middle of the outer surface of the circular plate 301 and are arranged at equal intervals in a ring shape. A track rod 309 is fixedly arranged inside the storage groove. A drive block 306 is elastically arranged on the outer surface of the track rod 309 through a fourth spring 312. A spreading arm 310 is fixedly arranged in the middle of one end of the outer surface of the drive block 306 facing away from the drive shaft 105. An anti-slip pad 311 is fixedly arranged on the upper surface of the spreading arm 310 to increase the friction at the joint and avoid slipping. A lifting rack 313 is fixedly arranged on the outer surface of the drive block 306 at one end facing the drive shaft 105 for driving the drive block 306 to lift synchronously. A transfer shaft 307 is arranged on the outer surface of the circular plate 301 near each lifting rack 313. A synchronous gear 308 is rotatably installed on the outer surface of the transfer shaft 307 through a bearing. The synchronous gear 308 is meshed with the lifting rack 313. A drive gear ring 302 is rotatably arranged in the middle of one end of the outer surface of the circular plate 301 facing the drive shaft 105. Each synchronous gear 308 is meshed and driven with the drive gear ring 302. A plurality of positioning wheels 305 are arranged at equal intervals in a ring shape in the middle of one end of the outer surface of the circular plate 301 and located at one end of the drive gear ring 302 for centering the drive gear ring 302. A drive rod 304 is rotatably installed at the bottom of the circular plate 301 through a bearing. A drive gear 303 is fixedly installed on the outer surface of the drive rod 304 near one side of the drive gear ring 302. The drive gear 303 is meshed and driven with the drive gear ring 302. The outer end of the drive rod 304 is connected and assembled with the output end of an external drive member through a coupling.

[0030] According to the above, the device adjusts the spraying distance through the adaptive distance-adjusting spraying mechanism 200, effectively solves the defect of "thick at the peak and thin at the valley" caused by the corrugated surface of the bellows, ensures uniform coating coverage, improves the integrity and durability of the anti-corrosion layer. The bidirectional screw 102 drives the movable seat 101 to move symmetrically, and cooperates with the centering clamping mechanism 300 to realize automatic centering and clamping of the pipe fittings, replacing manual operation, significantly reducing the labor intensity and improving the processing efficiency.

[0031] According to the disclosure and teachings of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above. Some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A stainless steel bellows processing and anti-corrosion treatment device, comprising a base (100), characterized in that: A movable seat (101) is disposed on both sides of the inner surface of the base (100), and a support frame (104) is fixedly disposed in the middle of the upper surface of the movable seat (101), and a drive shaft (105) is rotatably mounted inside the support frame (104) and located at the longitudinal center axis of the support frame (104) through a bearing, and a centering clamping mechanism (300) for positioning and clamping the stainless steel bellows is disposed in the middle of the outer end of the drive shaft (105), and further comprising: a centering clamping mechanism (300) for positioning and clamping the outer surface of the stainless steel bellows An adaptive distance-adjustable spraying mechanism (200) for spraying, the adaptive distance-adjustable spraying mechanism (200) comprising a guide rod frame (201) fixedly arranged in the middle of the outer surface of a base (100), and a movable vertical plate (202) arranged on the outer surface of the guide rod frame (201), and also comprising a guide transverse plate (203) fixedly arranged in the middle of the upper end of the movable vertical plate (202), and a plurality of guide rails (209) arranged at equal intervals are fixedly arranged on the outer surface of the guide transverse plate (203) and facing the side of the stainless steel corrugated pipe.

2. The device for processing and anti-corrosion treatment of stainless steel bellows according to claim 1, characterized in that: A telescopic arm (210) is elastically provided inside the guide rail (209) via a third spring (217), and the end of the telescopic arm (210) is designed to be a semicircular structure. A paint collecting tube (218) is installed on the outer surface of the movable vertical plate (202), an atomizing nozzle (220) is installed on the inner wall of the end of the telescopic arm (210), and a material guiding hose (222) is provided at the inlet end of the atomizing nozzle (220), the outlet end of the material guiding hose (222) is connected to the inlet end of the atomizing nozzle (220), and the inlet end of the material guiding hose (222) is connected to the outlet end of the paint collecting tube (218), and the inlet end of the paint collecting tube (218) is connected to the outlet end of the external pump body.

3. The device for processing and anti-corrosion treatment of stainless steel bellows according to claim 2, characterized in that: A forward sawtooth bar (221) is fixedly arranged on the upper surface of the telescopic arm (210), a slider (206) is arranged in the middle of the upper surface of the guide transverse plate (203), and an adapter plate (207) is fixedly arranged on the outer surface of the slider (206) and on the side facing the guide rail (209), and a driving transverse plate (208) is fixedly arranged at the end of the adapter plate (207), and a reverse sawtooth plate (213) is arranged below the driving transverse plate (208) and at the position of each forward sawtooth bar (221), and the reverse sawtooth plate (213) and the driving transverse plate (208) are elastically arranged via a second spring (214).

4. The device for processing and anti-corrosion treatment of stainless steel corrugated pipe according to claim 3, characterized in that: Both sides of the telescopic arm (210) are provided with a plurality of arm wheels (219) arranged at equal intervals, the bottom of the slider (206) is designed in an inverted T-shaped structure, the upper surface of the guide cross plate (203) is provided with a slide groove designed in an inverted T-shaped structure, the movable vertical plate (202) and the guide rod frame (201) are elastically arranged by a first spring (205), and vertical rods (215) are fixedly arranged on the upper surface of the reverse sawtooth plate (213) and at the positions of each second spring (214), and the reverse sawtooth plate (213) is slidably engaged with the forward sawtooth bar (221).

5. The device for processing and anti-corrosion treatment of stainless steel bellows according to claim 1, characterized in that: A second fixed key (212) is fixedly arranged on the outer surface of the guide transverse plate (203) and close to the position of the slider (206); a first fixed key (211) is fixedly arranged in the middle of the outer surface of the slider (206); a first electric telescopic rod (204) is installed inside the guide rod frame (201); an output end of the first electric telescopic rod (204) is connected and assembled with the outer end of the movable vertical plate (202); a second electric telescopic rod (216) is installed on the upper surface of the guide transverse plate (203) and close to the position of the slider (206); an output end of the second electric telescopic rod (216) is connected and assembled with the outer end of the slider (206).

6. The device for processing and anti-corrosion treatment of stainless steel bellows according to claim 1, characterized in that: The centering clamping mechanism (300) comprises a circular plate (301), the circular plate (301) being connected to the driving shaft (105), a plurality of storage grooves being arranged in a circular shape with equal spacing being formed through the middle of the outer surface of the circular plate (301), a track rod (309) being fixedly arranged inside the storage groove, a driving block (306) being elastically arranged on the outer surface of the track rod (309) via a fourth spring (312), a spreading arm (310) being fixedly arranged on the outer surface of the driving block (306) and at the middle of one end facing away from the driving shaft (105), and an anti-slip pad (311) being fixedly arranged on the upper surface of the spreading arm (310).

7. The device for processing and anti-corrosion treatment of stainless steel bellows according to claim 6, characterized in that: A lifting rack (313) is fixedly arranged on the outer surface of the driving block (306) facing one end of the driving shaft (105); a transfer shaft (307) is arranged on the outer surface of the circular plate (301) near each lifting rack (313); a synchronous gear (308) is rotatably mounted on the outer surface of the transfer shaft (307) via a bearing; a driving gear ring (302) is rotatably mounted on the outer surface of the circular plate (301) facing the middle of one end of the driving shaft (105); and a plurality of ring-shaped gears are installed on the outer surface of the circular plate (301) at the middle of one end of the driving gear ring (302). The positioning wheels (305) are arranged at intervals, a driving rod (304) is rotatably mounted on the bottom of the circular plate (301) through a bearing, a driving gear (303) is fixedly mounted on the outer surface of the driving rod (304) and close to the driving gear ring (302), the outer end of the driving rod (304) is connected and assembled with the output end of the external driving member through a coupling, the synchronous gear (308) is meshed with the lifting rack (313), each of the synchronous gears (308) is meshed with the driving gear ring (302) for transmission, and the driving gear (303) is meshed with the driving gear ring (302) for transmission.

8. The device for processing and anti-corrosion treatment of stainless steel bellows according to claim 1, characterized in that: The movable seat (101) and the base (100) are slidably arranged via a seat wheel (106); a bidirectional screw (102) is rotatably installed inside the base (100) and located at the transverse center axis of the base (100) via a bearing; guide rods (103) are fixedly arranged on both sides of the inner surface of the base (100); a worm gear (109) is installed on the outer surface of one of the drive shafts (105); a bearing seat (107) is arranged at the bottom of the worm gear (109); A worm (108) is rotatably mounted inside the seat (107) via a bearing, the outer end of the worm (108) is connected and assembled with the output end of the external drive member via a coupling, the two movable seats (101) are both engaged with the bidirectional screw (102) via threads, the outer end of the bidirectional screw (102) is connected and assembled with the output end of the external drive member via a coupling, the bearing seat (107) is connected to the support frame (104), and the worm (108) is meshed with the worm wheel (109) for transmission.

Images