A reducer assembly

Abstract

The application discloses a kind of reducer assemblies, it is related to the technical field of reducer assembly, including contact type static electricity guide component, it is set inside the reducer box body, contact type static electricity guide component is internally provided with the felt capable of moving back and forth, and the surface of felt has antistatic agent, for transmitting the static charge of gear to the fiber of felt, avoid gear surface electric erosion pit, two reset springs of contact type static electricity guide component installation and second gear surface contact, for same posture smoothly contact gear surface, ensure that antistatic agent is evenly applied, and the structure can realize the intermittent application of antistatic agent, can be operated when antistatic agent needs intervention, the original performance of base oil is maximized to retain, and multiple reinforcing ribs form radial support structure, increase support area, and disperse pressure.

Description

Technical Field

[0001] This invention relates to the field of speed reducer assembly technology, specifically to a speed reducer assembly. Background Technology

[0002] Mechanical transmission includes gear transmission. A reducer assembly, commonly called a speed reducer, is an indispensable core component in modern mechanical transmission systems. Its main functions can be summarized in three points: reducing speed, increasing torque, and changing the direction of transmission. Reducers are used wherever motors and equipment need to operate at different speeds and with different forces. Gear transmission is the process of transmitting the rotational power and motion of one gear to another through the meshing of the teeth of two or more gears. To achieve speed reduction, the key is to select a suitable gear ratio. The gear ratio refers to the ratio of the number of teeth on the driving gear to the number of teeth on the driven gear in two meshing gears. When the number of teeth on the driving gear is less than that on the driven gear, the speed of the driven gear will be lower than that of the driving gear, thus achieving a speed reduction effect. This speed reduction effect is achieved through the meshing transmission between gears. Reduction gears have wide applications in mechanical equipment. In automotive transmission systems, gearboxes use gear combinations with different gear ratios to achieve different speed ratios to meet the driving needs of vehicles under different operating conditions.

[0003] Speed ​​reduction requires the meshing of two gears with different numbers of teeth. Typically, both gears are made of alloy steel. During high-speed meshing, the tooth surfaces constantly contact and separate. Even with a lubricating oil film separating them, the roughness of the tooth surface protrusions leads to solid-to-solid friction, causing static electricity. As static electricity accumulates, it breaks down the lubricating oil film at the gear meshing point, instantly melting the tooth surface metal and forming tiny pits. As the gears continue to rotate, these pits become stress concentration points, gradually expanding into pitting and spalling. In severe cases, stripes appear on the tooth surface, ultimately leading to loss of gear precision. Some reducers use carbon brushes that continuously contact the helical gear end face, eliminating static electricity through grounding. However, the carbon brushes wear down during this continuous process, producing carbon dust. This dust enters the lubricating oil, becoming abrasive and affecting gear precision. The continuous pressure of the carbon brushes on the rotating parts creates frictional resistance, increasing the resistance to gear meshing and reducing the smoothness of gear engagement, thus lowering the reducer's speed reduction efficiency. Therefore, a speed reducer assembly is designed to address this issue. Summary of the Invention

[0004] The purpose of this invention is to provide a reducer assembly to solve the problems mentioned in the background art, such as the wear of carbon brushes during continuous operation, the generation of carbon powder, the entry of these powders into the lubricating oil as abrasives, the impact on gear precision, and the frictional resistance caused by the continuous pressure of the carbon brushes on the rotating parts, which increases the resistance of gear meshing.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a reducer assembly, comprising: Gearbox housing; Four bearing housings, wherein a first gear is disposed between two of the bearing housings and a second gear is disposed between the other two bearing housings; The contact-type electrostatic conductive component is installed inside the gearbox. The contact-type electrostatic conductive component contains a felt that can move back and forth, and the surface of the felt is coated with an antistatic agent to transfer the electrostatic charge of the gear to the felt fibers, thereby preventing electrolytic erosion pits on the tooth surface. The contact-type electrostatic conductive component drives the felt to contact the tooth surface of the second gear through two installed return springs, so as to make stable contact with the tooth surface in the same posture and ensure that the antistatic agent is evenly applied. The stabilized bonding assembly is located inside the contact-type electrostatic conductive assembly. The first vertical plate driven by the felt is close to the magnet strip installed in the stabilized bonding assembly. An iron core is provided on the side of the first vertical plate, and the iron core is magnetically connected to the magnet strip to ensure that the felt and the tooth surface are in a stable bonding state. The reset-type flushing and suction assembly is located inside the contact-type electrostatic conductive assembly. The felt moves away from the second gear and approaches the position sensor installed on the reset-type flushing and suction assembly, driving the air pump in the control box to collect pollutants using the suction airflow.

[0006] Preferably, the contact-type electrostatic conductive assembly further includes two barrier plates, two first support rods, two first support blocks, a U-shaped frame, and two arc-shaped plates. The two barrier plates are respectively disposed inside the gearbox, the two first support rods are respectively disposed inside the gearbox, the two first support blocks are respectively movably sleeved with one end of the two first support rods, the U-shaped frame is disposed on the top of the two first support blocks, and the two arc-shaped plates are respectively disposed on both sides of the top of the U-shaped frame.

[0007] Preferably, the contact-type electrostatic conductive assembly further includes two protruding plates, two tension springs, two support plates, a rigid cylinder, and multiple reinforcing ribs. The two protruding plates are respectively disposed on the inner side of the two arc-shaped plates, the two tension springs are respectively disposed on the top of the two protruding plates, the bottom of the two support plates are respectively connected to one end of the two tension springs, the rigid cylinder is disposed between the two support plates, and the multiple reinforcing ribs are respectively disposed on the outside of the rigid cylinder.

[0008] Preferably, the contact-type electrostatic conductive assembly further includes a cover ring, an insulating cylinder, multiple impact holes, a servo motor, a third gear, and a straight rack. The cover ring is disposed at one end of multiple reinforcing ribs, the insulating cylinder is sleeved at one end of the cover ring, the felt is sleeved at one end of the insulating cylinder, the multiple impact holes are respectively opened on the surface of the felt, the servo motor is disposed inside the gearbox, and the output shaft of the servo motor is drivenly connected to the third gear.

[0009] Preferably, the contact-type electrostatic conductive assembly further includes a second support rod, a second support block, a T-shaped block, and two return springs. The T-shaped block is disposed on the top of one of the first support blocks. The second support rod is disposed inside the gearbox body. The second support block is sleeved on one end of the second support rod. One side of the straight rack is connected to one side of the second support block. One side of the T-shaped block is connected to one side of the straight rack. The two return springs are respectively wound around the outside of the two first support rods.

[0010] Preferably, the stabilizing bonding assembly further includes two first magnet blocks, two binding plates, two second magnet blocks, and two extension plates. The two first magnet blocks are respectively disposed on one side of the U-shaped frame, the two binding plates are respectively disposed on one side of the two barrier plates, the two second magnet blocks are respectively disposed on one side of the two binding plates, the two extension plates are respectively disposed on the top of the two binding plates, and a plurality of magnet strips are respectively disposed on one side of the two extension plates.

[0011] Preferably, the two first vertical plates are respectively disposed on one side of the two support plates, the two first magnet blocks are magnetically connected to the two second magnet blocks respectively, and the plurality of magnet strips are magnetically connected to the two iron cores respectively.

[0012] Preferably, the reset-type flushing assembly further includes a guide plate, an L-shaped tube, a bellows, two second vertical plates, and multiple first cams. The guide plate is inserted and connected to one side of the felt, the L-shaped tube is inserted and connected to one side of the control box, the bellows is disposed at one end of the L-shaped tube, the two second vertical plates are respectively disposed at the top of the control box, and the multiple first cams are respectively disposed at the top of the two second vertical plates.

[0013] Preferably, the reset-type flushing assembly further includes multiple second cams, a receiving box, and a protective cover, with the multiple second cams respectively disposed at the bottom of the two first vertical plates.

[0014] Preferably, the receiving box is located inside the gearbox, and the protective cover is located on one side of the gearbox.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, through the meshing of the second gear and the first gear, the antistatic agent on the surface of the second gear is transferred to the tooth surface of the first gear. Both gears are coated with antistatic agent, which can immediately take effect at the source of charge generation, improving the efficiency of static dissipation. By starting the servo motor, the third gear is driven to rotate, which in turn drives the straight rack meshed with it to move back and forth. When the straight rack moves forward, it transfers the antistatic agent to the gear tooth surface. When the straight rack moves backward, the gear tooth surface separates from the felt. This structure enables intermittent application of the antistatic agent, allowing operation when intervention is needed, and preserving the maximum amount of antistatic agent. The original properties of the base oil, multiple reinforcing ribs forming a radial support structure, increase the support area, disperse pressure, and make the cover ring evenly stressed. The felt base uses special oleophilic and hydrophobic fibers, and microporous channels are embedded inside the felt. The oleophilic and hydrophobic fiber material is a non-woven fiber made of polyester and polypropylene, which can ensure preferential adsorption of oily antistatic agents and repel water stains on the gear surface. An internal grid layer is embedded as a skeleton to prevent the felt from being stretched and deformed when moving back and forth. The felt is supported by two tension springs, which can replace elastic support with rigid support, avoiding the instantaneous impact that causes the felt to be flattened or torn when it comes into contact with the tooth surface of the second gear.

[0016] In this invention, two first vertical plates drive the iron core to move, gradually bringing it closer to the magnetic strip. The two magnetically attract each other, and upon contact, the magnetic strip and iron core become magnetically connected, tightly adhering together. This clamps the felt between the two extension plates. At this point, the felt is positioned on the side of the second gear. As the second gear rotates, the antistatic agent on the felt surface contacts the gear teeth, transferring the antistatic agent to the gear teeth. After electrostatic conduction is complete, the U-shaped frame moves backward. As the force separating the first vertical plates from the extension plates increases, the iron core and magnetic strip separate, the return spring gradually extends, and the straight rack moves backward. This structure enables the... The felt is intermittently coated with an antistatic agent on the tooth surface of the second gear. The magnetic strip and the iron core attract each other, allowing them to automatically align. The magnetic force guides the felt to slide automatically to the position of the second gear, ensuring that the felt adheres to the tooth surface of the second gear at the same angle each time. The antistatic agent covers all areas without dead corners, maximizing the contact area between the felt and the tooth surface. The control box contains a miniature air pump and control circuit. An L-shaped tube is inserted and connected to one side of the control box, serving as the airflow inlet and outlet channel. A corrugated pipe is located at one end of the L-shaped tube, and its other end is connected to the guide plate. The corrugated pipe is flexible and can freely expand and contract with the back and forth movement of the felt, ensuring that the air path remains unobstructed during movement. A position sensor is used to detect the position of the U-shaped frame. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a speed reducer assembly according to the present invention; Figure 2 This is a schematic diagram of the internal cross-sectional structure of the main body of a reducer assembly according to the present invention; Figure 3 This is a schematic diagram of the structure of a contact-type electrostatic discharge component in a speed reducer assembly according to the present invention; Figure 4 In a speed reducer assembly of the present invention Figure 3 A magnified structural diagram at point A; Figure 5 This is a partial top view of the felt structure in a speed reducer assembly according to the present invention; Figure 6 This is a schematic diagram of the structure of a stabilizing bonding component in a reducer assembly according to the present invention; Figure 7 This is a schematic diagram of the structure of a reset-type suction assembly in a reducer assembly according to the present invention; Figure 8 This is a partial side view of a reducer assembly according to the present invention. Figure 9 This is a partial side view of the receiving box in a reducer assembly according to the present invention.

[0018] In the diagram: 100, Gearbox housing; 101, Bearing seat; 102, First gear; 103, Second gear; 2, Contact-type static discharge assembly; 201, Barrier plate; 202, First support rod; 203, First support block; 204, U-shaped frame; 205, Arc plate; 206, Convex plate; 207, Tension spring; 208, Support plate; 209, Rigid cylinder; 210, Reinforcing rib; 211, Cover ring; 212, Insulating cylinder; 213, Felt; 214, Impact hole; 215, Servo motor; 216, Third gear; 217, Straight rack; 218, Second... 219. Support rod; 220. Second support block; 221. T-shaped block; 222. Return spring; 3. Stabilizing bonding assembly; 301. First magnet block; 302. Restraining plate; 303. Second magnet block; 304. Extension plate; 305. Magnet strip; 306. First vertical plate; 307. Iron core; 4. Reset-type suction assembly; 401. Guide plate; 402. Control box; 403. L-shaped tube; 404. Corrugated pipe; 405. Position sensor; 406. Second vertical plate; 407. First cam; 408. Second cam; 409. Receiving box; 410. Protective cover. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] To address the problems in existing reducer assemblies and processing devices where carbon brushes wear down during operation, generating carbon dust that enters the lubricating oil and becomes an abrasive, affecting gear precision, and where the continuous pressure of the carbon brushes on rotating parts creates frictional resistance that increases gear meshing resistance, this invention provides a reducer assembly, as described above. Figure 1 and Figure 2 As shown: including: Gearbox body 100; Four bearing housings 101, wherein a first gear 102 is provided between two bearing housings 101 and a second gear 103 is provided between the other two bearing housings 101; The contact-type electrostatic conductive component 2 is installed inside the gearbox 100. The contact-type electrostatic conductive component 2 is equipped with a felt 213 that can move back and forth. The surface of the felt 213 is coated with an antistatic agent to transfer the electrostatic charge of the gear to the fibers of the felt 213, thereby preventing electrolytic pitting on the tooth surface. The contact-type electrostatic conductive component 2 drives the felt 213 to contact the tooth surface of the second gear 103 through two installed return springs 221, so as to make stable contact with the tooth surface in the same posture and ensure that the antistatic agent is evenly applied. The stabilized bonding component 3 is located inside the contact-type electrostatic conductive component 2. The first vertical plate 306 driven by the felt 213 is close to the magnet strip 305 installed in the stabilized bonding component 3. The side of the first vertical plate 306 is provided with an iron core 307, and the iron core 307 is magnetically connected to the magnet strip 305 to ensure that the felt 213 and the tooth surface are in a stable bonding state. The reset-type flushing and suction assembly 4 is located inside the contact-type electrostatic conductive assembly 2. The felt 213 moves away from the second gear 103 and approaches the position sensor 405 installed on the reset-type flushing and suction assembly 4, driving the air pump in the control box 402 to collect pollutants by using the suction airflow.

[0021] First, deceleration means the process of transferring the rotational power and motion of one gear to another through the meshing of the teeth of two or more gears. To achieve deceleration, the key is to select a suitable gear ratio. The gear ratio refers to the ratio of the number of teeth of the driving gear to the number of teeth of the driven gear in two meshing gears. When the number of teeth of the driving gear is less than that of the driven gear, the rotational speed of the driven gear will be lower than that of the driving gear, thus achieving the deceleration effect. The driving gear is the first gear 102, and the driven gear is the second gear 103. The motor drives the first gear 102, which rotates at high speed. The teeth of the first gear 102 push the teeth of the second gear 103 in sequence, and the two mesh closely. Since the second gear 103 has more teeth, its angular velocity decreases and its angular acceleration increases. At the meshing point, the tangential force applied by the first gear 102 acts on the pitch circle radius of the second gear 103, thereby outputting a larger torque. The second gear 103 transmits the power to the working machine through a coupling, thus achieving the purpose of deceleration.

[0022] To address the issue of carbon brushes wearing down and producing carbon powder during continuous operation, which then enters the lubricating oil and becomes an abrasive, a contact-type conductive static electricity component 2 is installed to intermittently deliver an antistatic agent to the gear tooth surface for static electricity treatment.

[0023] Preferably, the specific working process of the contact-type static discharge component 2 is as follows: Figure 3 As shown, the contact-type electrostatic conductive assembly 2 also includes two barrier plates 201, two first support rods 202, two first support blocks 203, a U-shaped frame 204, and two arc-shaped plates 205. The two barrier plates 201 are respectively disposed inside the gearbox 100, the two first support rods 202 are respectively disposed inside the gearbox 100, the two first support blocks 203 are respectively movably sleeved with one end of each of the two first support rods 202, the U-shaped frame 204 is disposed on top of the two first support blocks 203, and the two arc-shaped plates 205 are respectively disposed on both sides of the top of the U-shaped frame 204. 01 are respectively fixedly installed on the top of the gearbox 100 to isolate the first support rod 202 from the arc plate 205. The two first support rods 202 are fixedly installed inside the gearbox 100. The two first support blocks 203 are respectively movably sleeved on one end of the first support rods 202. The bottom of the U-shaped frame 204 is fixedly installed on the top of the two first support blocks 203 to adjust the front and back movement position of the U-shaped frame 204. The bottom of the two arc plates 205 are respectively fixedly connected to the top of the U-shaped frame 204. The movement of the U-shaped frame 204 will drive the arc plate 205 to move synchronously.

[0024] Preferred, according to Figure 5As shown, the contact-type static-dissipating assembly 2 also includes two protruding plates 206, two tension springs 207, two support plates 208, a rigid cylinder 209, and multiple reinforcing ribs 210. The two protruding plates 206 are respectively disposed on the inner sides of the two arc-shaped plates 205, the two tension springs 207 are respectively disposed on the tops of the two protruding plates 206, the bottoms of the two support plates 208 are respectively connected to one end of the two tension springs 207, the rigid cylinder 209 is disposed between the two support plates 208, and the multiple reinforcing ribs 210 are respectively disposed on the outside of the rigid cylinder 209. The contact-type static-dissipating assembly 2 also includes a cover. The structure includes a ring 211, an insulating cylinder 212, multiple impact holes 214, a servo motor 215, a third gear 216, and a straight rack 217. The covering ring 211 is located at one end of multiple reinforcing ribs 210. The insulating cylinder 212 is fitted over one end of the covering ring 211. Felt 213 is fitted over one end of the insulating cylinder 212. Multiple impact holes 214 are respectively formed on the surface of the felt 213. The servo motor 215 is located inside the gearbox 100. The output shaft of the servo motor 215 is driven by the third gear 216. One side of each of the two convex plates 206 is connected to one side of each of the two arc-shaped plates 205. With the side plates fixed, the movement of the arc plate 205 will drive the convex plate 206 to move synchronously. One end of each of the two tension springs 207 is fixed to the top of the two convex plates 206, which is used to drive the felt 213 to sway slightly. The bottoms of the two support plates 208 are fixed to the other ends of the two tension springs 207. The rigid cylinder 209 is connected to the two support plates 208 by two bolts. One end of each of the multiple reinforcing ribs 210 is connected to the outer wall of the rigid cylinder 209, and the multiple reinforcing ribs 210 are arranged at equal intervals to increase the support area. The inner surface of the covering ring 211 is connected to the outer wall of the rigid cylinder 209 by multiple reinforcing ribs 210. One end of each reinforcing rib 210 is fixed together. The insulating cylinder 212 is fixedly sleeved on one end of the covering ring 211 and is used to support the felt 213. Multiple neodymium magnets are provided inside the insulating cylinder 212. The felt 213 is embedded with the corresponding magnets. The two are magnetically connected, so the insulating cylinder 212 and the felt 213 present a magnetic quick-release structure. Multiple impact holes 214 are equally spaced on the surface of the felt 213 for reverse suction of airflow. The servo motor 215 is fixedly installed inside the gearbox 100, and the top of the third gear 216 is connected to the output shaft of the servo motor 215.

[0025] Preferred, according to Figure 4As shown, the contact-type electrostatic discharge assembly 2 also includes a second support rod 218, a second support block 219, a T-block 220, and two return springs 221. The T-block 220 is disposed on the top of one of the first support blocks 203. The second support rod 218 is disposed inside the gearbox 100. The second support block 219 is sleeved on one end of the second support rod 218. One side of the straight rack 217 is connected to one side of the second support block 219, and one side of the T-block 220 is connected to one side of the straight rack 217. The two return springs 221 are respectively wound around the outside of the two first support rods 202. The second support rod 218 is fixedly disposed inside the gearbox 100. The second support block 219 is movably sleeved on one end of the second support rod 218. One side of the straight rack 217 is fixed to one side of the second support block 219. The T-shaped block 220 is fixed to the top of one of the first support blocks 203. One side of the T-shaped block 220 is fixed to one side of the straight rack 217. The movement of the first support block 203, connected by the T-shaped block 220, drives the second support block 219 to move at one end of the second support rod 218. Through the meshing connection between the third gear 216 and the straight rack 217, the first support block 203 is also driven to move back and forth, thereby adjusting the distance between the felt 213 and the second gear 103.

[0026] Beforehand, the staff sprayed an antistatic agent onto the surface of the felt 213. The felt 213 is made of absorbent material. After the antistatic agent is applied, the surface gradually becomes moist. The servo motor 215 is then started, which drives the third gear 216, which is connected to its output shaft, to rotate. This, in turn, drives the straight rack 217, which is meshed with the rack, to move back and forth. The straight rack 217 continues to transmit force to the second support block 219 and the first support block 203. The second support block 219 moves back and forth at one end of the second support rod 218, while the two first support blocks 203 are located on the first support rod 202. One end moves smoothly back and forth, and under the connection of the U-shaped frame 204, it drives the two arc-shaped plates 205 to move synchronously. The two protruding plates 206 move synchronously with the arc-shaped plates 205, continuing to drive the felt 213 to move, so that the felt 213 gradually approaches the second gear 103. The antistatic agent on the surface of the felt 213 directly contacts the tooth surface of the second gear 103, discharging static electricity through the antistatic agent. Through the meshing of the second gear 103 and the first gear 102, the antistatic agent on the surface of the second gear 103 will be transferred to the tooth surface of the first gear 102. All materials are coated with an antistatic agent, which can immediately take effect at the source of charge generation, improving static dissipation efficiency. By activating the servo motor 215, the third gear 216 rotates, which in turn moves the straight rack 217 meshing with it back and forth. When the straight rack 217 moves forward, it transfers the antistatic agent to the gear teeth. When the straight rack 217 moves backward, the gear teeth separate from the felt 213. This structure enables intermittent application of the antistatic agent, allowing operation when intervention is needed, and preserving the original properties of the base oil to the greatest extent. To avoid waste, the antistatic agent forms a molecular layer with ionic conductivity on the gear tooth surface, using the originally insulating oil film as a conductor. This allows the static charge generated by friction to be safely discharged through the contact felt 213 and the grounding wire, preventing the charge from accumulating to the breakdown voltage and causing electrolytic corrosion. The static electricity on the gear is conducted to the grounding wire through the felt 213 and discharged through the grounding wire. When the first support block 203 moves, it transmits the force to the return spring 221. The return spring 221 is compressed and deformed under the force, converting kinetic energy into elastic potential energy, thus limiting the moving distance of the first support block 203.

[0027] It is important to note that multiple reinforcing ribs 210 form a radial support structure, increasing the support area, dispersing pressure, and ensuring uniform stress on the covering ring 211. The base of the felt 213 is made of special oleophilic and hydrophobic fibers, and microporous channels are embedded inside the felt 213. The oleophilic and hydrophobic fiber material is a non-woven fiber made of polyester and polypropylene, which can ensure preferential adsorption of oily antistatic agents and repel water stains on the gear surface. An internal grid layer is embedded as a skeleton to prevent the felt 213 from being stretched and deformed when moving back and forth. The felt 213 is supported by two tension springs 207, which can replace elastic support with rigid support, avoiding the instantaneous impact that causes the felt 213 to be flattened or torn when it comes into contact with the tooth surface of the second gear 103.

[0028] To address the issue of insufficient stability in the contact-type electrostatic conductive component 2's movement and contact with the gear surface, a stabilizing contact component 3 is installed to enhance stability when in contact with the gear tooth surface.

[0029] Preferably, the specific working process of the stabilized bonding component 3 is as follows: Figure 6As shown, the stabilizing bonding assembly 3 also includes two first magnet blocks 301, two binding plates 302, two second magnet blocks 303, and two extension plates 304. The two first magnet blocks 301 are respectively disposed on one side of the U-shaped frame 204, the two binding plates 302 are respectively disposed on one side of the two barrier plates 201, the two second magnet blocks 303 are respectively disposed on one side of the two binding plates 302, the two extension plates 304 are respectively disposed on the top of the two binding plates 302, multiple magnet strips 305 are respectively disposed on one side of the two extension plates 304, and two first vertical plates 306 are respectively disposed on one side of the two support plates 208. The two first magnet blocks 301 and the two second magnet blocks 303 are magnetically repelled, and the multiple magnet strips 305 are magnetically connected to the two iron cores 307. The two first magnet blocks 301 are fixedly disposed on one side of the U-shaped frame 204, the two binding plates 302 are fixedly disposed on one side of the two barrier plates 201, and one end of each of the two second magnet blocks 303 is fixedly attached to one side of the two binding plates 302. As the U-shaped frame 204 and the second magnet block 303 gradually approach each other, the magnetic repulsion between the first magnet block 301 and the second magnet block 303 prevents the U-shaped frame 204 from moving continuously, thus stabilizing it in a specific position where it contacts the second gear 103. One side of each of the two first vertical plates 306 is fixed to one side of each of the two support plates 208, and the bottom of each of the two extension plates 304 is fixed to the top of each of the two binding plates 302. Multiple magnet strips 305 are respectively fixed... The first vertical plate 306 is fixed on one side of the two extension plates 304. When the U-shaped frame 204 moves closer to the second gear 103, the two first vertical plates 306 gradually approach the extension plates 304. The two iron cores 307 and the magnetic strips 305 are magnetically attracted. As the two approach each other, the first vertical plates 306 and the magnetic strips 305 are attracted and connected. The attraction between the two ensures the stability of the felt 213, confining it to a specific position and preventing it from shaking back and forth, making it more firmly connected to the second gear 103.

[0030] After the servo motor 215 installed on the contact-type electrostatic discharge assembly 2 starts, it drives the straight rack 217, which meshes with the third gear 216, to move back and forth. Under the transmission of force, the first support block 203 moves at one end of the first support rod 202, which in turn drives the U-shaped frame 204 to move back and forth. As the U-shaped frame 204 moves, the two first magnet blocks 301 move synchronously. The two first magnet blocks 301 gradually approach the restraint plate 302, and thus gradually approach the second magnet block 303. The magnetic repulsion between magnet 301 and second magnet 303 slows down the movement of U-shaped frame 204, preventing it from shifting away from the position of second gear 103 due to continuous movement. As U-shaped frame 204 moves, the first vertical plates 306 mounted on both sides of felt 213 move accordingly. The two first vertical plates 306 drive the iron core 307 to move, and the iron core 307 gradually approaches the magnetic strip 305. The two are magnetically attracted, and upon contact, the magnetic strip 305 and iron core 307 are magnetically connected and tightly attracted to each other. When attached together, the felt 213 is clamped between the two extension plates 304. At this time, the felt 213 is located on the side of the second gear 103. As the second gear 103 rotates, the antistatic agent on the surface of the felt 213 will come into contact with the tooth surface of the second gear 103, transferring the antistatic agent to the tooth surface of the second gear 103. After the electrostatic conduction is completed, the U-shaped frame 204 moves backward. As the force separating the first vertical plate 306 from the extension plate 304 increases, the iron core 307 and the magnet strip 305 separate from each other. The return spring 221 gradually extends and stretches, while the straight rack 217 moves backward. This structure enables the felt 213 to intermittently coat the tooth surface of the second gear 103 with antistatic agent. The magnetic strip 305 and the iron core 307 are attracted to each other and can automatically align with each other. The magnetic force will guide the felt 213 to automatically slide to the position of the second gear 103, ensuring that the felt 213 fits the tooth surface of the second gear 103 at the same angle every time. The antistatic agent is covered without dead corners, and the contact area between the felt 213 and the tooth surface is maximized.

[0031] To address the issue of contaminants adhering to the surface of the contact-type conductive component 2 and affecting the electrostatic treatment effect, a reset-type flushing component 4 is installed to use the suction airflow to clean the contaminants from the surface of the contact-type conductive component 2.

[0032] Preferably, the specific working process of the reset-type flushing and suction assembly 4 is as follows: Figure 7 , Figure 8 and Figure 9As shown, the reset-type flushing and suction assembly 4 also includes a guide plate 401, an L-shaped tube 403, a bellows tube 404, two second vertical plates 406, and multiple first cams 407. The guide plate 401 is inserted and connected to one side of the felt 213, the L-shaped tube 403 is inserted and connected to one side of the control box 402, the bellows tube 404 is located at one end of the L-shaped tube 403, the two second vertical plates 406 are respectively located at the top of the control box 402, and the multiple first cams 407 are respectively located at the top of the two second vertical plates 406. The reset-type flushing and suction assembly 4 also includes multiple second cams 408, a receiving box 409, and a protective cover 410. The multiple second cams 408 are respectively located at the bottom of the two first vertical plates 406, and the receiving box 409 is located inside the gearbox 100. The protective cover 410 is installed on one side of the gearbox 100. The position sensor 405 is fixedly installed inside the baffle plate 201. Multiple second cams 408 are respectively fixedly installed at the bottom of two first vertical plates 306. The two second vertical plates 406 are respectively fixedly installed at the top of the control box 402. Multiple first cams 407 are respectively fixedly installed at the top of two second vertical plates 406. The contact between the second cams 408 and the first cams 407 causes the felt 213 to vibrate. When the U-shaped frame 204 retracts, it gradually approaches the position sensor 405, triggering the position sensor 405 and driving the air pump in the control box 402 to work. One end of the guide plate 401 is connected to the microporous air passage and impact hole 214 in the felt 213. The felt 213 interacts with the second gear. During the process of applying antistatic agent to the tooth surface of gear 103 and discharging static electricity, it is inevitable that sludge, metal shavings, and residual lubricating oil contaminants adhering to the surface of the second gear 103 will be adsorbed. If not cleaned in time, these contaminants will clog the pores of the felt fibers, reduce the wetting efficiency of the antistatic agent and the static electricity discharge ability, and may even bring the contaminants back to the tooth surface during the next application, causing secondary pollution and abrasive wear. The guide plate 401 is used to guide the clean airflow and suction to the surface and interior of the felt 213. The control box 402 is equipped with a miniature air pump and control circuit. The L-shaped tube 403 is inserted and connected to one side of the control box 402 as the inlet and outlet channel of the airflow. The corrugated tube 404 is set at one end of the L-shaped tube 403, and its other end is connected to the guide plate. Connected at 401, the corrugated tube 404 is flexible and can freely expand and contract with the back-and-forth movement of the felt 213, ensuring that the air passage remains unobstructed during movement. The position sensor 405 is used to detect the position of the U-shaped frame 204. When the U-shaped frame 204 retracts to the preset position, it triggers the position sensor 405, which immediately sends an electrical signal to the control circuit in the control box 402. The control circuit then starts the internal micro air pump, putting it into suction mode. At this time, the negative pressure generated by the air pump is guided through the L-shaped tube 403 to the corrugated tube 404, then to the guide plate 401, and finally flows to the microporous air passages inside the felt 213 and the multiple impact holes 214 suction holes on the surface of the felt 213, forming a directional negative pressure area on the surface of the felt 213 and inside the fibers.As the U-shaped frame 204 retracts, multiple second cams 408 fixedly mounted at the bottom of the first vertical plate 306 slide into contact with multiple first cams 407 fixedly mounted at the top of the second vertical plate 406. Due to the contour curve of the cam surface, the relative movement between the two causes the first vertical plate 306 to vibrate at high frequency and with small amplitude. This vibration is transmitted to the felt 213 through a magnetic connection, causing the felt fibers to vibrate slightly. The vibration loosens the sludge and metal shavings attached to the surface and deep layers of the felt 213 fibers. The negative pressure airflow draws in these loosened contaminants and enters the internal air passage of the felt through the suction holes 214. The material is then guided by the guide plate 401, corrugated pipe 404, and L-shaped pipe 403, and finally fed into the dust collection chamber inside the control box 402. The protective cover 410 prevents contaminants from splashing during the suction process, ensuring they fall into the receiving box 409. The control circuit automatically stops the air pump. The felt 213 has completed self-cleaning and is in a clean, ready-to-use state, awaiting the next forward coating operation. The mechanical force generated by shaking loosens the stains, causing them to detach from the fiber surface, and then they are carried away by the negative pressure airflow. This shaking and suction cleaning mode improves cleaning efficiency and thoroughness, extends the service life of the felt 213, and enhances the reliability of the entire antistatic agent coating device.

[0033] Working Principle: Mechanical transmission includes gear transmission. A speed reducer assembly, commonly called a reducer, is an indispensable core component in modern mechanical transmission systems. Its main functions can be summarized in three points: reducing speed, increasing torque, and changing the transmission direction. Speed ​​reducers are used wherever motors and equipment need to operate at different speeds and forces. Gear transmission is the process of transmitting the rotational power and motion of one gear to another through the meshing of the teeth of two or more gears. To achieve speed reduction, the key is to select a suitable gear ratio. The gear ratio refers to the ratio of the number of teeth on the driving gear to the number of teeth on the driven gear in two meshing gears. When the number of teeth on the driving gear is less than that on the driven gear, the speed of the driven gear will be lower. The gear will be lower than the driving gear, thus achieving a deceleration effect. This deceleration effect is achieved through the meshing transmission between gears. Reduction gears have wide applications in mechanical equipment. In automotive transmission systems, gearboxes use gear combinations with different gear ratios to achieve different speed ratios to meet the driving needs of vehicles under different operating conditions. Deceleration requires the meshing of two gears with different numbers of teeth. Usually, both gears are made of alloy steel. When the two gears mesh at high speed, the tooth surfaces will continuously contact and separate. Even with a lubricating oil film separating them, the roughness of the tooth surface protrusions will still cause solid-to-solid friction between the protrusions, leading to triboelectric charging. As static electricity accumulates, it will break through the lubricating oil film at the gear meshing point, and the discharge point will instantly melt the metal of the tooth surface. Tiny pits form, and as the gears continue to rotate, these pits become stress concentration points, gradually expanding into pitting and spalling. In severe cases, stripes appear on the tooth surface, ultimately leading to loss of gear precision. Some reducers use carbon brushes that continuously contact the end face of the helical gears, with grounding wires to eliminate static electricity. However, the carbon brushes themselves wear down during this continuous process, producing carbon dust. This dust enters the lubricating oil and becomes an abrasive, affecting gear precision. The continuous pressure of the carbon brushes on the rotating parts creates frictional resistance, which increases the resistance to gear meshing, reducing the smoothness of gear meshing and thus reducing the reduction efficiency of the reducer. To address this, a reducer assembly is designed, with the driving gear being the first gear 102, the driven gear being the second gear 103, and the motor driving... The first gear 102 rotates at high speed, and its teeth sequentially push the teeth of the second gear 103, resulting in close meshing. Because the second gear 103 has more teeth, its angular velocity decreases while its angular acceleration increases. At the meshing point, the tangential force applied by the first gear 102 acts on the pitch circle radius of the second gear 103, thus outputting greater torque. The second gear 103 transmits the power to the working machine through a coupling, thereby achieving speed reduction. Beforehand, an antistatic agent is sprayed onto the surface of the felt 213, which is made of absorbent material. After the antistatic agent is applied, the surface gradually becomes moist. The servo motor 215 is then started, driving the third gear 216, which is connected to its output shaft, to rotate.This causes the straight rack 217, which meshes with it, to move back and forth. The straight rack 217 continues to transmit force to the second support block 219 and the first support block 203. The second support block 219 moves back and forth at one end of the second support rod 218, while the two first support blocks 203 move smoothly back and forth at one end of the first support rod 202. With the connection of the U-shaped frame 204, the two arc plates 205 move synchronously, and the two convex plates 206 move synchronously with the arc plates 205, continuing to drive the felt 213 to move. This causes the felt 213 to gradually approach the second gear 103. The antistatic agent on the surface of the felt 213 directly contacts the tooth surface of the second gear 103, discharging static electricity through the antistatic agent and then through the second gear 103. 3. When the second gear 103 meshes with the first gear 102, the antistatic agent on the surface of the second gear 103 is transferred to the tooth surface of the first gear 102. Both gears are coated with antistatic agent, which can immediately play a role at the source of charge generation, improving the efficiency of static dissipation. By starting the servo motor 215, the third gear 216 is driven to rotate, which in turn drives the straight rack 217 meshing with it to move back and forth. When the straight rack 217 moves forward, it transfers the antistatic agent to the gear tooth surface. When the straight rack 217 moves backward, the gear tooth surface separates from the felt 213. This structure enables intermittent application of the antistatic agent, allowing operation when intervention is needed, preserving the original performance of the base oil to the greatest extent, and avoiding waste. The antistatic agent is applied through... A molecular layer with ionic conductivity is formed on the gear tooth surface, using the originally insulating oil film as a conductor. This allows the static charge generated by friction to be safely discharged through the contact felt 213 and the grounding wire, preventing the charge from accumulating to the breakdown voltage and causing electrolytic corrosion. The static electricity on the gear is conducted to the grounding wire through the felt 213 and then discharged through the grounding wire. When the first support block 203 moves, it transmits force to the return spring 221. The return spring 221 is compressed and deformed under force, converting kinetic energy into elastic potential energy, thus limiting the moving distance of the first support block 203. When the U-shaped frame 204 and the second magnet block 303 gradually approach each other, the magnetic repulsion between the first magnet block 301 and the second magnet block 303 causes the movement of the U-shaped frame 204 to be stopped, preventing the U-shaped frame 204 from moving. 04. Continuous movement stabilizes the felt 213 in a specific position, where it contacts the second gear 103. One side of each of the two first vertical plates 306 is fixed to one side of each of the two support plates 208. The bottoms of each of the two extension plates 304 are fixed to the tops of each of the two binding plates 302. Multiple magnetic strips 305 are fixedly installed on one side of each of the two extension plates 304. As the U-shaped frame 204 moves closer to the second gear 103, the two first vertical plates 306 gradually approach the extension plates 304. The two iron cores 307 are magnetically attracted to the magnetic strips 305. As they approach each other, the first vertical plates 306 and the magnetic strips 305 are attracted together. This attraction ensures the stability of the felt 213, confining it to a specific position and preventing it from swaying back and forth.To ensure a more secure contact with the second gear 103, the servo motor 215 mounted on the contact-type electrostatic discharge assembly 2 starts, driving the straight rack 217, which meshes with the third gear 216, to move back and forth. Under the transmission of force, the first support block 203 moves at one end of the first support rod 202, thus driving the U-shaped frame 204 to move back and forth. As the U-shaped frame 204 moves, the two first magnet blocks 301 move synchronously, gradually approaching the restraint plate 302, and thus gradually approaching the second magnet block 303. The first magnet blocks 301 and the second magnet blocks 303 repel each other magnetically, slowing down the movement speed of the U-shaped frame 204 and preventing it from shifting from the position area of ​​the second gear 103 due to continuous movement. As 204 moves, the first vertical plates 306 mounted on both sides of the felt 213 move accordingly. The two first vertical plates 306 drive the iron core 307 to move, and the iron core 307 gradually approaches the magnetic strip 305. The two are magnetically attracted to each other, and as they come into contact, the magnetic strip 305 and the iron core 307 are magnetically connected and tightly attracted together, clamping the felt 213 between the two extension plates 304. At this time, the felt 213 is just located on the side of the second gear 103. As the second gear 103 rotates, the antistatic agent on the surface of the felt 213 will come into contact with the tooth surface of the second gear 103, transferring the antistatic agent to the tooth surface of the second gear 103. After the electrostatic conduction is completed, the U-shaped frame 204 moves backward, and as the first vertical plates 306 and the extension plates move, the first vertical plates 306 and the first vertical plates 306 move together. As the force of separation increases, the iron core 307 and the magnetic strip 305 separate, the return spring 221 gradually extends and stretches, and the straight rack 217 moves backward. This structure enables the felt 213 to intermittently coat the tooth surface of the second gear 103 with antistatic agent. The attraction between the magnetic strip 305 and the iron core 307 allows them to automatically align with each other. The magnetic force guides the felt 213 to automatically slide to the position of the second gear 103, ensuring that the felt 213 always adheres to the tooth surface of the second gear 103 at the same angle. The antistatic agent covers all areas without dead corners, maximizing the contact area between the felt 213 and the tooth surface. When the U-shaped frame 204 retracts, it gradually approaches the position sensor 405, triggering the position sensor 405 and driving the air pump in the control box 402 to work. The guide plate 4... One end of 01 is connected to the microporous air passage and impact hole 214 inside the felt 213. During the process of applying antistatic agent and discharging static electricity in contact with the tooth surface of the second gear 103, the felt 213 will inevitably adsorb the sludge, metal shavings and residual lubricating oil contaminants attached to the surface of the second gear 103. If not cleaned in time, these contaminants will block the pores of the felt fibers, reduce the wetting efficiency of the antistatic agent and the static electricity discharge ability, and may even bring the contaminants back to the tooth surface during the next application, causing secondary pollution and abrasive wear. The guide plate 401 is used to guide the clean airflow and suction to the surface and interior of the felt 213. The control box 402 is equipped with a micro air pump and control circuit. The L-shaped tube 403 is inserted and connected to one side of the control box 402.As the inlet and outlet channel for airflow, the bellows 404 is located at one end of the L-shaped tube 403, and its other end is connected to the guide plate 401. The bellows 404 is flexible and can freely expand and contract with the back and forth movement of the felt 213, ensuring that the air passage remains unobstructed during movement. The position sensor 405 is used to detect the position of the U-shaped frame 204. When the U-shaped frame 204 retracts to the preset position, it will trigger the position sensor 405, which will immediately send an electrical signal to the control circuit in the control box 402. The control circuit will then... The internal micro air pump is activated and put into suction mode. The negative pressure generated by the pump is guided through the L-shaped tube 403 to the bellows 404, then to the guide plate 401, and finally flows to the microporous air channels inside the felt 213 and the multiple impact holes 214 suction holes on the surface of the felt 213. This creates a directional negative pressure area on the surface of the felt 213 and inside the fibers. Simultaneously, as the U-shaped frame 204 retracts, multiple second cams 408 fixedly mounted at the bottom of the first vertical plate 306, along with those fixedly mounted... Multiple first cams 407 on the top of the second vertical plate 306 slide in contact. Due to the contour curve of the cam surface, the relative movement between the two causes the first vertical plate 306 to vibrate at high frequency and small amplitude. This vibration is transmitted to the felt 213 through magnetic connection, causing the felt fibers to vibrate slightly. The vibration loosens the oil sludge and metal shavings attached to the surface and deep layers of the felt 213 fibers. The negative pressure airflow sucks in these loosened contaminants, which enter the internal air passage of the felt through the impact hole 214 suction hole, and then through the guide plate 401, corrugated pipe 404, and L-shaped pipe 403, and is finally sent into the dust collection chamber in the control box 402. The protective cover 410 prevents contaminants from splashing during the suction process and ensures that they fall into the receiving box 409. The control circuit automatically stops the air pump. The felt 213 has completed self-cleaning and is in a clean and ready-to-use state, waiting for the next forward coating operation. The mechanical force generated by the vibration can loosen the stains and remove them from the fiber surface, which are then carried away by the negative pressure airflow. The cleaning mode of shaking and suction at the same time improves the cleaning efficiency and thoroughness. ,

[0034] The miniature air pump and position sensor 405 in this invention are common knowledge in the field, and their working principle is a well-known technology. The appropriate model is selected according to the actual use. Therefore, the control method and wiring layout of the miniature air pump and position sensor 405 will not be explained in detail.

[0035] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A speed reducer assembly, characterized in that, include: Gearbox (100); Four bearing housings (101), wherein a first gear (102) is provided between two of the bearing housings (101), and a second gear (103) is provided between the other two bearing housings (101). The contact-type electrostatic conductive component (2) is installed inside the gearbox (100). The contact-type electrostatic conductive component (2) is provided with a felt (213) that can move back and forth. The surface of the felt (213) is covered with an antistatic agent to transfer the electrostatic charge of the gear to the fibers of the felt (213) to avoid electrolytic pitting on the tooth surface. The contact-type electrostatic conductive component (2) drives the felt (213) to contact the tooth surface of the second gear (103) through two reset springs (221) to make stable contact with the tooth surface in the same posture and ensure that the antistatic agent is evenly applied. The stabilized bonding assembly (3) is located inside the contact-type electrostatic conductive assembly (2). The first vertical plate (306) driven by the felt (213) is close to the magnet strip (305) installed in the stabilized bonding assembly (3). The side of the first vertical plate (306) is provided with an iron core (307), and the iron core (307) is magnetically connected to the magnet strip (305) to ensure that the felt (213) and the tooth surface are in a stable bonding state. The reset-type flushing assembly (4) is located inside the contact-type electrostatic discharge assembly (2). The felt (213) moves away from the second gear (103) and approaches the position sensor (405) installed in the reset-type flushing assembly (4), driving the air pump in the control box (402) to collect pollutants by using the suction airflow.

2. The reducer assembly according to claim 1, characterized in that: The contact-type electrostatic conductive assembly (2) further includes two barrier plates (201), two first support rods (202), two first support blocks (203), a U-shaped frame (204), and two arc-shaped plates (205). The two barrier plates (201) are respectively disposed inside the gearbox (100), the two first support rods (202) are respectively disposed inside the gearbox (100), the two first support blocks (203) are respectively movably sleeved with one end of the two first support rods (202), the U-shaped frame (204) is disposed on the top of the two first support blocks (203), and the two arc-shaped plates (205) are respectively disposed on both sides of the top of the U-shaped frame (204).

3. The reducer assembly according to claim 2, characterized in that: The contact-type electrostatic conductive assembly (2) also includes two protruding plates (206), two tension springs (207), two support plates (208), a rigid cylinder (209), and multiple reinforcing ribs (210). The two protruding plates (206) are respectively disposed on the inner side of the two arc-shaped plates (205). The two tension springs (207) are respectively disposed on the top of the two protruding plates (206). The bottom of the two support plates (208) is respectively connected to one end of the two tension springs (207). The rigid cylinder (209) is disposed between the two support plates (208). The multiple reinforcing ribs (210) are respectively disposed on the outside of the rigid cylinder (209).

4. The reducer assembly according to claim 3, characterized in that: The contact-type electrostatic conductive assembly (2) also includes a cover ring (211), an insulating cylinder (212), multiple impact holes (214), a servo motor (215), a third gear (216), and a straight rack (217). The cover ring (211) is disposed at one end of multiple reinforcing ribs (210). The insulating cylinder (212) is sleeved on one end of the cover ring (211). The felt (213) is sleeved on one end of the insulating cylinder (212). Multiple impact holes (214) are respectively opened on the surface of the felt (213). The servo motor (215) is disposed inside the gearbox (100). The output shaft of the servo motor (215) is driven by the third gear (216).

5. The reducer assembly according to claim 4, characterized in that: The contact-type electrostatic conductive assembly (2) further includes a second support rod (218), a second support block (219), a T-block (220), and two return springs (221). The T-block (220) is disposed on the top of one of the first support blocks (203). The second support rod (218) is disposed inside the gearbox (100). The second support block (219) is sleeved on one end of the second support rod (218). One side of the straight rack (217) is connected to one side of the second support block (219). One side of the T-block (220) is connected to one side of the straight rack (217). The two return springs (221) are respectively wound around the outside of the two first support rods (202).

6. The reducer assembly according to claim 1, characterized in that: The stabilized bonding assembly (3) further includes two first magnet blocks (301), two binding plates (302), two second magnet blocks (303), and two extension plates (304). The two first magnet blocks (301) are respectively disposed on one side of the U-shaped frame (204), the two binding plates (302) are respectively disposed on one side of the two barrier plates (201), the two second magnet blocks (303) are respectively disposed on one side of the two binding plates (302), the two extension plates (304) are respectively disposed on the top of the two binding plates (302), and a plurality of magnet strips (305) are respectively disposed on one side of the two extension plates (304).

7. The reducer assembly according to claim 6, characterized in that: Two first vertical plates (306) are respectively disposed on one side of two support plates (208), two first magnet blocks (301) are magnetically connected to two second magnet blocks (303) respectively, and multiple magnet strips (305) are magnetically connected to two iron cores (307) respectively.

8. The reducer assembly according to claim 1, characterized in that: The reset-type flushing assembly (4) further includes a guide plate (401), an L-shaped tube (403), a bellows tube (404), two second vertical plates (406), and multiple first cams (407). The guide plate (401) is inserted and connected to one side of the felt (213), the L-shaped tube (403) is inserted and connected to one side of the control box (402), the bellows tube (404) is located at one end of the L-shaped tube (403), the two second vertical plates (406) are respectively located at the top of the control box (402), and the multiple first cams (407) are respectively located at the top of the two second vertical plates (406).

9. The reducer assembly according to claim 8, characterized in that: The reset-type flushing assembly (4) also includes multiple second cams (408), a receiving box (409), and a protective cover (410), with the multiple second cams (408) respectively disposed at the bottom of the two first vertical plates (306).

10. The reducer assembly according to claim 9, characterized in that: The receiving box (409) is located inside the gearbox (100), and the protective cover (410) is located on one side of the gearbox (100).

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