118results about How to "Increase the gap" patented technology

This invention discloses a power supply device for safety engineering equipment on construction sites, relating to the field of power supply devices. It includes a power cabinet and multiple batteries. The power cabinet is cylindrical with a notch on one side, where a side filter is installed. It should be noted that, in this embodiment, when the batteries are in use, the radial layout effectively increases the gap between batteries while ensuring the number of batteries is sufficient, increasing airflow and improving heat dissipation. A combination of central heat dissipation and rotating lateral heat dissipation ensures uniform heat dissipation for each battery, eliminating localized hotspots, improving heat dissipation efficiency, extending battery life, and reducing maintenance costs and replacement frequency. Furthermore, the sliding filter plate can slide open, directly exposing the batteries to further enhance heat dissipation. When not dissipating heat, it closes, providing ample protection against dust, moisture, and impact.

The utility model belongs to fresh noodle production equipment field, concretely relates to a kind of anti-adhesion mechanism for fresh noodle processing, be set to noodle press, the noodle press includes the noodle cutting pair roller of installation by means of rack, the anti-adhesion mechanism includes shunt plate, first conveyor belt and second conveyor belt, the shunt plate, first conveyor belt and second conveyor belt are sequentially arranged in the height direction below noodle cutting pair roller and are connected with rack, the upper end of the shunt plate is arranged between the front noodle outlet end, rear noodle outlet end of noodle cutting pair roller, the front output end, rear output end of shunt plate are respectively connected with first conveyor belt, second conveyor belt, the conveying direction of the first conveyor belt and second conveyor belt is opposite, the first powder box of being located above first conveyor belt, the second powder box of being located above second conveyor belt are set on the rack, and the anti-adhesion mechanism can make dry powder fully wrap the surface of noodle, avoid the adhesion between noodle.

The utility model discloses a sprouting incubator for soybean planting, which relates to the technical field of soybean planting and comprises a base, a connecting shell is fixedly mounted at the upper end of the outer wall of the base, two bilaterally symmetrical rotating rods are rotatably arranged in the connecting shell, and placing frames are fixedly mounted on the side walls of the rotating rods in a linear arrangement manner. According to the bean seed cultivation device, bean seeds are placed and cultivated through the two semicircular cultivation pots in each placing frame, and all the placing frames on the left side and the right side are driven to rotate at the same time through rotation of the two rotating shafts; according to the device, water mist can be evenly sprayed to bean seeds in the semicircular cultivation pots on each rotating shaft, the bean seeds in the semicircular cultivation pots are automatically watered, meanwhile, a plurality of placing frames are arranged on each rotating rod, more bean seeds can be cultivated at a time, and the device is convenient to use. The number of bean sprouts cultivated by the device in unit area is increased, and the space utilization rate of the device is increased.

This invention provides a micro-adhesive film-attached flexible circuit board packaging tray and packaging method, including a tray body with a front and a back. The front has several circuit board placement areas, and non-recessed areas corresponding to the placement areas are non-placement areas. The tray also includes: edge-guarding protrusions on the edges of the non-placement areas; edge-guarding protrusions with several hand-positioning grooves; placement areas with several placement grooves; and spacer protrusions at the joints of the placement grooves, dividing the placement areas into several placement grooves; the hand-positioning grooves are connected to the placement grooves. The release film is pressed against the micro-adhesive film through the hand-positioning grooves, allowing for the alignment and rapid packaging of the circuit boards. The spacer protrusions in the tray placement areas prevent the micro-adhesive film from sticking and overlapping, and their number and position can be set according to the specifications of the shipping packaging, enabling the simultaneous and rapid production of products of uniform specifications and improving packaging efficiency. The hand-positioning grooves are ergonomically designed to fit the size of a human finger, facilitating operation.

This utility model discloses a shaping, cooling, and cleaning device for pigskin puffing processing, including a spraying mechanism and a feeding mechanism. The spraying mechanism includes a clean water tank, a water supply pipe, a diversion pipe, and a spray pipe. The feeding mechanism includes an equipment frame, a chain conveyor belt, a hanger, a drive motor, a submersible pump, and cleaning wheels. The hanger is fixedly installed on the upper surface of the equipment frame. The drive motor is installed on the side surface of the equipment frame to drive the chain conveyor belt and cleaning wheels. The submersible pump is installed in the water supply tank and supplies water to the diversion pipe through the water supply pipe. The diversion pipe is connected to the top of the spray pipe, and the spray pipe is movably installed on the equipment frame. This utility model has the advantages of adjustable spray angle, self-cleaning conveyor belt, and thorough cleaning, solving the problems of incomplete cleaning and cross-contamination caused by traditional equipment.

A gas spring mounting structure and connection structure, and a device having an opening and closing mechanism are disclosed. The gas spring mounting structure is used to connect the gas spring to the opening and closing mechanism. The first end of the gas spring is used to connect to the housing of the opening and closing mechanism. The gas spring mounting structure includes: a first support member with a first end face and a first hole in the first end face; a second support member with a second end face and a second hole corresponding to the first hole in the second end face; and a first threaded fastener, which is embedded in the second support member and the first support member through the second hole and the first hole to realize the disassembly and locking of the first support member and the second support member. The first threaded fastener is used to reduce the gap between the second support member and the first support member during the locking process, thereby gradually pre-tightening the gas spring. Furthermore, due to the existence of the gas spring mounting structure, no additional gas spring mounting fixture is required, avoiding the influence of the superposition of the tolerances of the fixture and the gas spring on the installation accuracy.

The application discloses a storage and transportation trolley, which comprises a bottom support horizontally arranged, at least four wheels arranged on the lower side of the bottom support, a first side support and a second side support, which are both vertically arranged on the bottom support and are arranged in parallel and at intervals, and a third side support and a fourth side support, which are arranged in parallel and at intervals between the first side support and the second side support, and each of the third side support and the fourth side support comprises a crossbeam and a plurality of vertical columns, the two ends of the crossbeam are connected with the first side support and the second side support respectively, the plurality of vertical columns are arranged in parallel and at intervals and are detachably inserted into the crossbeam, and the lower end of each vertical column is in abutment with the bottom support, wherein the crossbeam is parallel to the bottom support, and the vertical column is perpendicular to the bottom support. According to the storage and transportation trolley, plate-shaped objects can be conveniently stored and transported.

The utility model provides an improved X-ray detector which is characterized in that a first slope channel is arranged in an inlet assembly, and an outlet of the first slope channel is communicated with an inlet of a detection channel; a first material sliding plate is laid in the first slope channel; a first shielding curtain is arranged at an inlet of the first slope channel, and a second shielding curtain is arranged at an outlet; a second slope channel is arranged in the outlet assembly, the height from an inlet of the second slope channel to the ground is larger than that from an outlet to the ground, and the inlet of the second slope channel communicates with an outlet of the detection channel; a second material sliding plate is laid in the second slope channel; a third shielding curtain is arranged at an inlet of the second slope channel, and a fourth shielding curtain is arranged at an outlet of the second slope channel. The technical problems that in the prior art, due to the fact that the gap between the lead curtain and the conveying belt is too small, light objects are blocked, and due to the fact that the gap between the lead curtain and the conveying belt is too large, X-rays leak are solved.

This utility model relates to the field of yarn tube paper production technology, and more particularly to a calendering device for yarn tube paper production. The technical solution includes a base plate, with a fixed frame fixedly connected between the top edges of the base plate and the two sides. A guide roller is rotatably connected between the inner walls of the two sides of the fixed frame near the top edge. Connecting plates are slidably fitted onto the outer surfaces of the guide rollers near both ends. This utility model uses a first rotating gear to drive a bidirectional threaded rod to rotate, causing the connecting plates to move relative to each other under the action of the bidirectional threaded rod. The connecting plates drive limiting blocks to slide on the guide rollers, thereby effectively controlling the gap between the limiting blocks, facilitating the guidance of the yarn tube paper on the guide rollers, effectively reducing uneven guidance of the yarn tube paper, making the yarn tube paper more compact during calendering, and thus improving the calendering effect of the device.

This utility model discloses a rockery that is easy to plant, comprising a pool, several rocks, and a sprinkler system. Adjacent rocks are connected by a fixing component containing a grouting cylinder, enhancing the connection and perspective effect. The rocks are irregularly stacked around the sprinkler system, which includes a first water pump, nozzles, and a deflector to achieve water feature landscaping and misting effects. A second water pump delivers water to the top of the rockery. Mounting boxes are embedded in the sides of the rocks, containing planting blocks for planting greenery. The mounting boxes are connected to a humidification component containing a water channel and drip pipes to replenish water for the greenery and create a high-humidity environment. This rockery has a stable structure, offers diverse landscape effects, and facilitates planting and maintenance of greenery.

This invention provides a method for processing an ultrafine lithotripsy probe, comprising the following steps: S1. Inserting one end of the probe body into the mounting hole of the probe base to complete the initial assembly; S2. Placing the initially assembled ultrafine lithotripsy probe into a pressing device and fastening the probe body to the column of the pressing device, so that the probe base is located inside the heating coil of the heating machine; S3. Starting the heating machine to heat the probe base, and when the probe base reaches a predetermined state, using the pressing device to press the probe body into the mounting hole to a predetermined depth; S4. After pressing, removing the ultrafine lithotripsy probe and performing a cooling treatment. The ultrafine lithotripsy probe produced by this processing method has the advantages of tight assembly between the probe body and the probe base, low ultrasonic transmission loss, and the connection between the probe body and the probe base is not easily broken under high-frequency ultrasonic vibration, resulting in high lithotripsy efficiency.

The application discloses a kitchen sliding door, and aims to solve the problem that it is relatively inconvenient to open the sliding door when people are holding dishes with both hands. The technical scheme is as follows: the kitchen sliding door comprises a door frame and a door body, the door body is provided with a door handle capable of sliding inward, the door body is provided with a pushing device used for abutting against the door frame to push the door body to move, and the pushing device is connected with the door handle. The door handle is abutted against by the elbow or other positions, so that the door handle slides inward, the pushing device abuts against the inner wall of the door frame to push the door body to move, a gap is formed between the door body and the door frame, the user can insert the gap with the foot, the elbow or other positions, and push the door body to be completely opened, so that the inconvenient situation that the sliding door needs to be opened when people are holding dishes with both hands is reduced.

This application relates to the field of valve technology and discloses a pressure-dividing valve, including a bracket, valve body, connector, spring frame, pressure adjusting screws, valve seats, valve cores, cylindrical springs, and connector plugs. During use, rotating the two pressure adjusting screws causes them to gradually approach the two valve seats, pushing the two valve cores continuously into the valve seats, thereby reducing the gap between the valve cores and the valve seats, and thus adjusting the pressure of the water flow to decrease. Conversely, as the two pressure adjusting screws gradually move away from the valve seats, the elastic force of the two springs pushes the two valve cores continuously out of the valve seats, thereby increasing the gap between the valve cores and the valve seats, and thus adjusting the pressure of the water flow to increase, thus regulating the pressure of the water flow.

The application discloses a flexible sheet feeding conveying device and belongs to the technical field of feeding equipment. The feeding conveying device comprises a feeding conveying assembly, the feeding conveying assembly comprises a pressing mechanism, a transfer mechanism and a clamping mechanism arranged on the transfer mechanism, the clamping mechanism arranged on the transfer mechanism is driven to move by the transfer mechanism in the feeding conveying assembly, so that the second clamping arm in the clamping mechanism can be inserted into the gap between the top layer sheet and the secondary layer sheet along the upper surface of the secondary layer sheet, then the top layer sheet is clamped by the opposite movement of the first clamping arm and the second clamping arm, and then the top layer sheet is transferred by the clamping mechanism. And the pressing mechanism is used for pressing the upper surface of the secondary layer sheet, which fixes the secondary layer sheet on one hand and avoids the movement of the secondary layer sheet, and on the other hand, the gap between the secondary layer sheet and the top layer sheet is increased, which is more conducive to the insertion of the first clamping arm into the gap to clamp the top layer sheet.

The utility model relates to an envelope, in particular to an envelope with a certificate easy to replace, which comprises a cover and a bottom surface, a connecting belt is connected between the cover and the bottom surface, a limit frame is fixedly connected on the inner side of the bottom surface, an opening is arranged on one side of the limit frame far away from the cover, a slot is arranged in the limit frame, and a limit strip is fixedly connected on one side of the cover far away from the bottom surface. The limiting strips can be located at the openings of the limiting frames, a plurality of protruding strips are fixedly connected to the positions, between the limiting frames, in the bottom face, the middles of the protruding strips protrude, and the protruding height of the protruding strips is smaller than that of the upper ends of the limiting frames. According to the utility model, the limiting frame and the limiting strip are designed, so that the certificate is limited and protected when the envelope is combined, and when the envelope is opened, a user directly pulls out the certificate towards one side for replacement. According to the technical scheme, the protruding strip is designed, the gap between the certificate and the bottom face can be increased through the protruding strip, when the certificate is placed, no pressure difference is generated between the certificate and the bottom face, and therefore the certificate can be taken out easily when taken out.

The application provides a rear axle steering continuous pipe operation roller semi-trailer. The semi-trailer comprises a frame, a roller arranged on the frame, a rear axle assembly and a rear axle steering mechanism. The rear axle steering mechanism comprises an upper support seat, a rotary disc bearing, a lower support seat and a steering driving assembly. The steering driving assembly and the upper support seat are arranged on the frame, the rotary disc bearing is connected with the upper support seat and the lower support seat respectively, and the lower support seat is fixedly connected with the rear axle assembly. The steering driving assembly is connected with the lower support seat to drive the lower support seat to rotate relative to the upper support seat and drive the rear axle assembly to rotate. The rear axle assembly is steered by adopting the steering driving mechanism to drive the lower support seat. The relative rotation angle between the frame and the wheel is large, the turning radius of the semi-trailer is reduced, the reliability of the steering driving is improved, the safety of the whole vehicle is improved, and the driving strength of the vehicle is reduced.

The application discloses a CACC vehicle platoon cooperative lane-changing control method in a mixed traffic flow environment, and steps include: determining an initial lane-changing gap of a target lane and a target connected automatic driving vehicle controlled cooperatively with the CACC vehicle platoon; obtaining vehicle motion state information of the CACC vehicle platoon, the target connected automatic driving vehicle and a preceding vehicle thereof; constructing a longitudinal control method, generating a lane-changing gap through vehicle cooperative deceleration, and controlling the vehicle to complete lane-changing by using a lateral control algorithm; and after the CACC vehicle platoon finishes lane-changing, controlling the vehicle to cruise at an expected distance by using the longitudinal control method again. When the vehicle gap in the target lane does not have lane-changing conditions, the CACC vehicle platoon can effectively realize lane-changing through cooperative control between vehicles.

This application relates to an arc-extinguishing structure for a relay and a relay. The relay includes an arc-extinguishing structure comprising an insulating cover, a magnetic plate, and an insulating plate. The insulating cover has a closed end and an open end. The magnetic plate is connected to the end face of the open end via a frame. The insulating plate is disposed close to the inner cavity sidewall of the insulating cover and is connected to the magnetic plate via an elastic element, such that at least a portion of the outer wall of the insulating plate can be attached to the inner sidewall of the insulating cover by the elastic force generated by the elastic element. In this way, the inner wall of the insulating plate and the inner cavity sidewall of the insulating cover can form a bent creepage path. The leakage current generated by the arc will creep along the bent creepage path, thus extending the creepage distance. Furthermore, it prevents the formation of a large gap between the inner cavity sidewall of the insulating cover and the insulating plate due to processing defects, thus preventing splashed metal particles from entering the gap and contaminating the inner cavity sidewall of the insulating cover, thereby reducing the insulating capacity of the insulating cover.

The utility model discloses a three-ring type inflation cover, and belongs to the technical field of tire inflation equipment. The device comprises an inner gas hood, a middle gas hood and an outer gas hood which are coaxially nested, and the inner gas hood, the middle gas hood and the outer gas hood are driven by a cylinder to realize axial lifting switching. The inner gas hood is driven by a first cylinder, an inner clamping ring at the top of the inner gas hood is in sliding fit with a middle clamping ring of the middle gas hood, and the outer gas hood is driven by an outer cylinder and sleeves the outer side of the middle gas hood; a locking air cylinder is arranged on the side wall of the outer gas hood, and the position of the gas hood is locked by being inserted into locking holes of the inner clamping ring and the middle clamping ring. The three groups of stepped ring structures ensure the sealing performance during gas hood switching, and gas leakage is avoided. An air pipe penetrates through the middle air hood connecting plate to be communicated with the inner air hood, and inflation of tires of different sizes is adapted through lifting switching. The device is compact in structure, free of extra centering and convenient to maintain, movement stability is improved through the design of the guide columns and the floating connectors, locking balance is guaranteed through uniform distribution of the locking air cylinders, and the device is suitable for efficient inflation operation of an automatic tire production line.

The present disclosure provides a ventilation device, comprising: a body provided with an opening; a panel covering the opening; a mounting assembly, the mounting assembly comprising: a clamping structure for clamping connection of the body and the panel, a locking structure provided on the opposite side of the clamping structure for locking the clamping structure, the clamping structure comprising: a connecting portion comprising a first connecting piece protruding from the panel to the side of the body and a second connecting piece protruding from the body to the side of the panel, a fixing portion comprising a first fixing portion protruding from the first connecting piece to the side of the second connecting piece and a second fixing portion protruding from the second connecting piece to the side of the first connecting piece, the second fixing portion being below the first fixing portion, and at least a part of the orthographic projection of the second fixing portion to the first fixing portion overlapping the first fixing portion, and a limiting portion protruding and extending from the connecting portion to the side of the fixing portion on the opposite side, and at least a part of the limiting portion contacting the mating surface of the fixing portion on the opposite side facing the connecting portion.

A scroll compressor includes a motor, a compression mechanism, a drive shaft and a bushing. The compression mechanism includes a fixed scroll and an orbiting scroll. The drive shaft has an eccentric journal. The bushing is designed to be movable relative to the eccentric journal to enable the orbiting scroll to have a variable eccentricity, wherein one axial section of the bushing is arranged between the orbiting scroll and the eccentric journal to enable the drive shaft to transmit power to the orbiting scroll via the one axial section of the bushing, and another axial section of the bushing is designed to limit the range of movement of the bushing relative to the eccentric journal to further define the range of variation of the variable eccentricity of the orbiting scroll. The bushing with the above configuration cooperates with the corresponding structure to reliably and effectively limit the range of movement thereof to enable the orbiting scroll to have a proper variable eccentricity, which reduces the requirement for assembly accuracy of the scroll compressor and thereby reduces the cost of the compressor.

This application discloses a static electricity neutralization method and apparatus based on PECVD, belonging to the field of semiconductor thin film deposition technology. It includes: applying a first radio frequency (RF) to a reaction chamber to ionize a continuously introduced reactive gas into the chamber, forming plasma which is then deposited onto the wafer surface; after stopping the introduction of the reactive gas and the application of the first RF, applying a second RF in the chamber, wherein the power of the second RF is lower than that of the first RF, and the voltage polarity of the second RF is opposite to that of the first RF; moving a heater base on which the wafer is placed downwards to increase the gap between the wafer and the heater base, thereby facilitating the neutralization of static electricity between the wafer and the heater base by the second RF; and after stopping the application of the second RF, introducing a purge gas into the chamber to clean the wafer surface. This application neutralizes static electricity through low-power plasma discharge, avoiding the problems of wafer breakage and adhesion caused by electrostatic forces between the wafer and the heater base.

The utility model provides a vacuum insulated panel and a heat preservation box, which can improve gaps when the vacuum insulated panel is spliced and reduce cold and heat loss in the using process. The vacuum insulated panel comprises a core material and an outer wrapping bag. The length and the width of the outer packaging bag are larger than those of the core material. The plate face of the core material comprises a first face and a second face which are oppositely arranged. The redundant part of the outer packaging bag comprises a first edge, a second edge and a corner part, and the redundant part is fixedly attached to the core material through a turnover structure. The folding structure comprises a first edge folding unit, an angle folding unit and a second edge folding unit. The first edge folding unit is formed in the mode that the first edge is folded inwards and attached to the first face in the mode that the first edge is tightly attached to the outline of the core material. The folding mark of the first edge folding unit extends to the corner part and folds the corner part, and the folded corner part is folded inwards and attached to the first edge and the first face in the mode that the folded corner part is tightly attached to the outline of the core material to form the corner folding unit. The second edge folding unit is formed in the mode that the second edge is folded inwards and attached to the corner and the first face in the mode that the second edge is tightly attached to the outline of the core material.

This invention belongs to the field of curbstone transportation technology, specifically a curbstone transportation trolley, including a transportation frame with wheels rotatably connected to both ends of the frame. A sleeve is fixedly installed on the top of the frame, and a sliding rod is slidably connected inside the sleeve. In this invention, the sliding rod rotates towards the curbstone body under the weight of a first and second clamping plate. The first and second clamping plates rotate along a connecting shaft, increasing the gap between them, allowing the curbstone body to enter between the two clamping plates and thus clamping it. As the end of the sliding rod away from the first connecting rope is pressed down, under the lever principle, the end of the sliding rod near the first connecting rope begins to rotate upwards, and under the weight of the curbstone body, the first and second clamping plates firmly clamp the curbstone body.

The utility model relates to the technical field of tunnel construction, in particular to a supporting device for tunnel linings, which comprises a plurality of groups of supporting structures, the supporting structures are arranged between two adjacent linings, each supporting structure comprises an abutting assembly, a sleeve and shaft pieces arranged on two sides of the sleeve, and the shaft pieces are slidably connected in the sleeves. One end of the shaft piece is hinged to the lining, the abutting assembly comprises an abutting block and a connecting rod, the connecting rod penetrates through the sleeve, and one end of the connecting rod is connected with the abutting block. According to the lining supporting device, after the shaft piece and the sleeve are connected, the center position of the sleeve is aligned with the position of a connecting seam of the adjacent linings, the shaft piece, the support and the sleeve enable the adjacent linings to be pressed tightly, the pressure of surrounding rock on the linings can be balanced to the maximum extent, the gap between the linings is prevented from becoming large, and the abutting block is arranged at the position of the connecting point of the adjacent linings. The abutting blocks tightly press the gaps between the adjacent linings, and the situation that the gaps between the adjacent linings become large due to surrounding rock pressure is further avoided.

This invention belongs to the field of solid waste treatment technology and discloses a sorting device for recycled concrete fragments, including a sorting component and further comprising: a vibration component disposed on the sorting component; and a buffer component disposed on the sorting component. The sorting component includes a sorting box, with a collection chamber 1 on the right side of the sorting box, a collection chamber 2 in the center of the sorting box, and a collection chamber 3 on the left side of the sorting box. Three fixed frames are movably fitted above the sorting box and located above the collection chambers 1, 2, and 3. Because the width of the discharge port of the feed box is smaller than the width of the feed port, the vibration of the feed box allows the concrete fragments to be evenly spread out during feeding, preventing them from accumulating in one place. This ensures that the concrete fragments evenly cover each screen surface, thereby improving the sorting efficiency of the concrete fragments.

The present application relates to the technical field of grading machine, propose a kind of carbon powder special grading machine, including grading cylinder, the outer surface of the grading cylinder is sequentially installed with exhaust port and air inlet from top to bottom, and tangential with the outer surface of the grading cylinder, the front of the air inlet is installed with fan, the top of the grading cylinder is fixedly installed with support cylinder, the side of the support cylinder is installed with feed inlet, the top of the support cylinder is installed with motor.The device can produce up and down vibration when the distribution disc rotates, the material in the "distribution area" is vibrated and scattered, the material with smaller quality is gradually moved to the upper layer, and the material moved to the upper layer can be horizontally moved to the outside of the distribution disc through the support plate and the vertical plate, while the material with larger quality is directly vertically downward through the discharge port, increasing the gap between the two materials, so that the material with smaller quality can be quickly separated, thereby realizing the function of improving the grading efficiency of the device.

This invention relates to the field of valve molding, and more particularly to a valve molding casting equipment and mold, comprising a mold body, with a gating and riser body at the upper end of the mold body. The mold body is made of foam plastic, and its surface is coated with a refractory coating. After drying, the mold body and the gating and riser body are bonded and fixed together with hot melt adhesive to form a mold cluster. It also includes a vibrating table and a sand box mounted on the upper end of the vibrating table. The sand box has an internal cavity that can be drawn into a negative pressure state. The cavity is connected to the bottom of the sand box through multiple air holes. A U-shaped frame is provided at the upper end of the sand box, with a plastic film covering its upper side. A support ring is provided on the inner side of the U-shaped frame, and the outer side of the support ring is fixedly connected to the U-shaped frame by multiple reinforcing rods. During use, this equipment, compared to existing technologies, ensures the sealing performance after film covering. Furthermore, when releasing the negative pressure state, a longer waiting time is eliminated, improving overall processing efficiency.

The utility model discloses a motor oil seal mounting structure belongs to motor technical field, including motor outer cover, the motor outer cover is rotationally connected with the pivot in, is provided with the bearing chamber in the motor outer cover, is rotationally connected with the bearing in the bearing chamber, is provided with the inner cover in the bearing chamber outside one side, is provided with the oil seal ring between the inner cover and the bearing, is provided with a plurality of muscle mouth on the oil seal ring along the circumferential direction, can help oil seal quick positioning and prevent rotation or eccentricity in the installation process, promotes the installation efficiency and operating stability, after the grease is extruded, the grease solution can be arranged to the inner cover space along the muscle mouth channel, then is arranged to export through the grease hole on the inner cover, thereby realizes the automatic renewal, avoids the old grease stagnation, the hardening even the blockage lubrication channel, is helpful to prolong the bearing life, keeps the smooth operation.