16results about How to "Avoid direct abrasion" patented technology

The invention discloses a tooth-shaped structure of a bolt fixing tool. The tooth-shaped structure comprises a drive part, a looping part is concavely arranged inside the drive part; the inner periphery of the looping part is a hollow structure and is approximately a polygonal structure, the intersectional angle between edges of the polygonal structure of the looping part are respectively provided with an escape groove, the escape groove is a recessed arc structure, an opening of the escape groove and an opening of the adjacent escape groove take on a straight edge, the straight edge is a lank line section; a top surface is respectively arranged at the center of the straight edges between two adjacent escape grooves, the top surface is in a planar straight line section structure, the top surface is arranged at the straight edge between the two adjacent escape grooves and is superposed on the straight edge; a first groove and a second groove are respectively recessed between the escape groove and the top surface, the first groove is closer to the escape groove, the second groove is closer to the top surface, the first and the second grooves are arranged in line symmetry with another first and second grooves; based on the intermediate vertical line of the distance between the two side walls of the escape groove with the arc structure, the first and the second grooves are arranged in line symmetry with another first and second grooves by the central vertical line of the distance between the two side walls of the arc structure of the escape grooves. The tooth-shaped structure of a bolt fixation tool can not cause slipping and bruting of the bolt fixing part resulting from the stress concentration of point contact.

The hidden uncovering dissecting table comprises a storage box and an upper cover plate capable of being wound and bent, an opening is formed in the upper end of the storage box, a supporting guide groove is formed in the side wall of the opening in the upper end of the storage box, an outer shell is arranged on the outer side of the storage box, and a hidden temporary storage space is formed between the outer shell and the storage box; the upper cover plate slides in the supporting guide groove and the hidden temporary storage space, and when the upper cover plate is in an open state, the upper cover plate slides and is hidden in the hidden temporary storage space; when the upper cover plate is in a closed state, the upper cover plate slides into the supporting guide groove from the hidden temporary storage space to seal and cover the upper end opening. When the upper cover plate of the dissecting table is closed, the upper cover plate directly slides into the hidden temporary storage space from the supporting guide groove, so that the space at the two ends of the dissecting table can be saved, and students can conveniently observe and operate the dissecting table.

The utility model relates to a novel eccentric semi-ball valve which comprises a valve body and a bottom plate, a valve pipe is fixedly connected to the side edge of the valve body, a flange is fixedly connected to the side edge of the valve pipe, a stand column is fixedly connected to the top of the bottom plate, a supporting block is fixedly connected to the top of the stand column and is in an arc shape, a connecting plate is installed on the inner side of the bottom plate, and a fixing block is installed on the top of the valve pipe. The fixing block is in an arc shape, first protruding blocks are arranged on the side edge of the fixing block, second protruding blocks are arranged on the side edge of the supporting block, through holes are formed in the first protruding blocks, threaded grooves are formed in the tops of the second protruding blocks, first bolts are arranged in the through holes, the first bolts are in threaded connection with the threaded grooves, and the number of the first protruding blocks is two, and the number of the second protruding blocks is two. The two first protruding blocks are distributed on the front side and the rear side of the fixing block, the two second protruding blocks are distributed on the front side and the rear side of the supporting block, and moving wheels are installed at the bottom of the bottom plate. The device is easy to operate and convenient to install, saves time, improves efficiency, improves flexibility, saves manpower, and is easy to detach and convenient to maintain and replace.

The invention relates to a double-acting pneumatic actuator which comprises an air cylinder module comprising a cylinder body assembly and a piston assembly, and the piston assembly is sequentially provided with a sealing component and a wear-resistant belt in the radial direction of the cylinder body assembly; the box body module is provided with a first end and a second end, the first end and the second end are each provided with an air cylinder module, a guide assembly and a shifting fork assembly are arranged in the box body module, and the guide assembly is used for guiding the piston assembly to move in the axial direction of the cylinder body assembly; the shifting fork assembly is used for being connected with a valve rotating shaft and converting linear motion of the piston assembly into rotating motion of the valve rotating shaft. The sealing mode of the sealing component and the wear-resistant belt is adopted on the piston assembly, the sealing component is in contact sealing with the wear-resistant belt, and the wear-resistant belt is in friction contact with the inner wall of the air cylinder for sealing, so that the service life of the sealing component can be effectively prolonged. The piston assembly operates more stably through the guide assembly, linear motion of the piston assembly is converted into rotation motion of the valve rotating shaft through the shifting fork assembly, and therefore opening and closing control over the valve is achieved.

The differential mechanism for the axle comprises a differential mechanism shell, a planetary gear, a cross shaft and a cross shaft support are installed in the differential mechanism shell, the planetary gear is installed on the cross shaft in a sleeved mode, the cross shaft is installed in the cross shaft support, and the cross shaft support is located in the middle of the differential mechanism shell. A rolling assembly is arranged between the planetary gear and the cross shaft, an inner hole of the planetary gear is a stepped hole, the outer side of the rolling assembly is limited through a circular bead of the planetary gear, and the inner side of the rolling assembly is limited through a cross shaft support. The roller pin assembly is arranged between the planetary gear and the cross shaft, and sliding friction between the planetary gear and the cross shaft is changed into rolling friction, so that the heat productivity and abrasion of the contact part are reduced, and the reliability of a product is improved.

The utility model belongs to power generation equipment, and particularly relates to an axial movement measuring and mounting structure of a fan of a thermal power plant. The measuring assembly is connected with the fan shaft and is internally provided with an accommodating cavity; the connecting assembly is arranged in the accommodating cavity of the measuring assembly, and comprises a transmission shaft, an input end of the transmission shaft extends out of the accommodating cavity; one end of the threaded rod is connected with the output end of the transmission shaft; the extrusion pipe is connected with the end, away from the transmission shaft, of the threaded rod. The pin rod is arranged on the inner wall of the containing cavity, and the axis of the pin rod is perpendicular to the axis of the extrusion pipe; the fixed end of the spring is connected to the inner wall of the containing cavity, and the telescopic end is connected with the pin rod. According to the utility model, the problem of abrasion between the sensor and the fan shaft caused by direct installation of the photoelectric sensor on the shaft for displacement measurement is solved, and the problem of data deviation caused by influence on the measurement precision due to instantaneous impact fluctuation generated during high-speed operation of the fan is also solved.

The utility model discloses a locking nut with a metal block, which comprises a nut body, the nut body is hollowed out along the axis of the nut body, a connecting block is slidably connected to the hollowed-out position of the nut body, a threaded groove is formed in the connecting block, a sliding groove is formed in the outer wall of the nut body, and the metal block is arranged in the sliding groove. Inserting blocks are fixedly connected to the inner walls of the two sets of arc-shaped connecting plates, the positions of the inserting blocks correspond to the positions of the two sets of inserting grooves, the inserting blocks are inserted into the adjacent inserting grooves, the two sets of connecting plates are connected through an elastic mechanism, and the connecting blocks are made of metal materials. The arc-shaped connecting plate capable of sliding along the sliding groove is arranged and matched with the spring in the elastic mechanism to push the wedge-shaped face of the inserting block to be tightly attached to the inserting groove, direct abrasion of the nut body is avoided, the connecting plate can be independently replaced after being abraded, and the nut does not need to be wholly replaced. The problem that a traditional small-diameter nut cannot be disassembled due to the fact that the outer surface is rounded is solved, and the maintenance cost is reduced.

This invention relates to the field of food processing equipment technology, and discloses a food processing machine with stable operation, including a mixing cup and a main unit equipped with a motor and a reduction mechanism. The reduction mechanism includes a fixed gear ring, a double gear, a moving gear ring, and a planetary carrier that cooperate with each other. The double gear includes a gear with a shaft hole and a gear shaft passing through the shaft hole. The gear shaft and the motor shaft are arranged side by side, and the motor shaft drives the gear and gear shaft to rotate synchronously. The gear includes an upper gear that meshes with the fixed gear ring and a lower gear that meshes with the moving gear ring. The shaft hole wall is provided with a wear-resistant part, which surrounds the gear shaft to limit the radial movement of the gear shaft. The outer surface of the wear-resistant part is fixedly connected to the shaft hole wall, and a heat dissipation gap is provided between the inner surface of the wear-resistant part and the gear shaft. The axial height h2 of the wear-resistant part and the shaft hole wall height h1 satisfy 1 / 2h1<h2≤h1-2mm. This avoids direct contact between the gear shaft and the shaft hole, provides good wear resistance to the shaft hole, ensures good alignment between the gear and the rotating shaft, and ensures stable operation.

The utility model relates to the technical field of thermal insulation pipes, in particular to a double-channel air conditioner thermal insulation pipe which comprises a main body, a buffer layer is fixedly connected to the inner wall of the main body, the buffer layer is made of silica gel materials, hollow channels are formed in the inner wall of the buffer layer, a plurality of limiting grooves are formed in the inner walls of the two hollow channels, and the limiting grooves are communicated with the main body. A road supply sleeve is installed in the left hollow channel, a clamping strip is fixedly connected to the outer wall of the road supply sleeve, a loop sleeve is installed in the right hollow channel, a clamping groove is formed in the outer wall of the loop sleeve, and limiting strips are fixedly connected to the outer wall of the road supply sleeve and the outer wall of the loop sleeve. According to the utility model, the condition that the supply path hose and the loop hose connected with the air conditioner are directly contacted with the main body and are abraded is avoided, the supply path hose and the loop hose connected with the air conditioner are quickly and conveniently mounted, and when one of the supply path hose and the loop hose is damaged, only the damaged hose needs to be independently replaced, so that the cost is saved.

This application relates to a rotary valve, comprising: a valve head having a main flow channel and a first switching flow channel; multiple first switching flow channels arranged around the axis of the valve head; a bushing fixedly disposed within the valve head, forming a static seal with the bushing; the bushing having a transition flow channel and a second switching flow channel; the transition flow channel communicating with the main flow channel, and the first switching flow channels corresponding to and communicating with the second switching flow channels; a valve core rotatably disposed within the bushing, forming a dynamic seal with the bushing; the valve core having a central flow channel, a first connecting flow channel, and a second connecting flow channel; the first connecting flow channel always communicating with the central flow channel and the transition flow channel; the second connecting flow channel being used to switch the central flow channel to communicate with different second switching flow channels after the valve core rotates. This utility model reduces the processing difficulty and inspection of rotary valves, improves the wear resistance of the valve head, and reduces the cost of replacing the entire valve head.

The utility model relates to the technical field of blade processing, and discloses a blade conveying device for a blade detector, which comprises a mounting frame, a conveying plate fixedly mounted on the upper surface of the mounting frame, a support rod fixedly mounted at the upper end of the conveying plate, an L-shaped conveying plate arranged at the lower end of the support rod and positioned in the conveying plate, and a plurality of blades arranged on the L-shaped conveying plate. The auxiliary mechanism is arranged on the L-shaped conveying plate, the auxiliary mechanism comprises a rubber pad and two threaded rods, four positioning rods are fixedly connected to the left end of the upper surface of the L-shaped conveying plate, the rubber pad is installed on the upper surface of the L-shaped conveying plate, and the upper ends of the four positioning rods all penetrate through the upper surface of the rubber pad. According to the blade conveying device, the blade is in flexible contact with the rubber pad after falling to the upper end of the L-shaped conveying plate, so that scratches on the contact surface of the blade and the L-shaped conveying plate are prevented, direct abrasion of the L-shaped conveying plate to the surface of the blade is avoided, the qualified rate of the blade is increased, and the subsequent blade detection effect is improved.

A kind of wear-resistant large shovel for heavy load operation, it is related to the technical field of shovel, solve the problem that the thickness of wear-resistant steel plate is excessively increased to improve wear resistance in prior art, leading to the excessive weight of shovel itself, affecting operation efficiency.Problems include bucket body, the edge of the bucket mouth of the bucket body is connected with reinforcing blade, the back of the bucket body is provided with trunnion seat;The inside of the two side walls of the bucket body is provided with a plurality of transverse reinforcing ribs and longitudinal reinforcing ribs, the transverse reinforcing ribs and the longitudinal reinforcing ribs are vertically intersected and distributed and form a grid structure, and the transverse reinforcing ribs and the longitudinal reinforcing ribs are welded at the intersection;The inside of the two side walls of the bucket body is also provided with a plurality of transverse reinforcing bars and longitudinal reinforcing bars, the transverse reinforcing bars and the longitudinal reinforcing bars are vertically intersected and distributed and form a grid structure, and the transverse reinforcing bars and the longitudinal reinforcing bars are welded at the intersection.The beneficial effect is: it can improve wear resistance, effectively control the weight of shovel itself, and ensure flexibility and efficiency during operation.

The utility model provides a combined four-shaft tightening machine tool plate which is used for limiting and installing four tightening shafts on a four-shaft tightening machine and comprises a bottom plate seat and four limiting guide sleeves. The four limiting guide sleeves are all of an annular T-shaped structure and are installed in positioning holes in the corresponding positions of the bottom plate base in an embedded mode. According to the combined type four-shaft tightening machine tool plate, the limiting guide sleeves with better abrasion resistance are additionally arranged on the bottom plate base, direct abrasion to the bottom plate base is avoided, the tightening shafts are more stable in the working process, the combined type four-shaft tightening machine tool plate is easy to disassemble and assemble and convenient to replace and machine, and the effect of protecting equipment is achieved while the production efficiency is improved.

The utility model provides a connecting device of a filter and a filtering system. The filter comprises a connecting port, the connecting device comprises a fixing piece and a connector pipe arranged on the fixing piece in a penetrating mode. The connecting device further comprises a first O-shaped ring, the connector pipe comprises an insertion section capable of being inserted into the connecting port, and the insertion section extrudes the first O-shaped ring to form sealed connection of the connector pipe and the filter. One side of the first O-shaped ring is provided with a limiting part through which the insertion section penetrates, a gap is formed between the outer side wall of the insertion section and the inner side wall of the connecting port, and an axial limiting distance for preventing the joint pipe from inclining at the angle exceeding the maximum inclination angle is formed between the limiting part and the first O-shaped ring; the maximum inclination angle is based on at least one of the compression ratio upper limit and the compression ratio lower limit of the first O-ring, and has the advantage of avoiding excessive inclination of the joint pipe so as to maintain the tightness of the first O-ring to the joint pipe and the connection port.

The utility model relates to mechanical manufacturing technical field, and disclose a kind of clamp for steel structure processing, including base, multiple pneumatic devices are symmetrically arranged on base, pneumatic device is arranged towards positioning clamp, positioning clamp is array distribution and drive device is penetrated in middle part, base other side is also provided with suction extractor.The utility model introduces repelling magnet and spring between positioning clamp and base, which forms a unique magnetic force suspension guiding buffering mechanism, compared with traditional mechanical contact friction, direct wear of workpiece is avoided, and the effect of reducing damage is achieved.

The utility model discloses a two-pole one-way impeller rotor which comprises a rotor frame, a magnetic ring arranged on the rotor frame in a sleeved mode and an impeller arranged at one end of the rotor frame, and the impeller comprises an impeller seat arranged at the end of the rotor frame and a plurality of elastic blades arranged on the upper end face of the impeller seat in a circle. Each elastic blade comprises a fixed part fixed on the impeller seat and an elastic part which is connected with the fixed part and is separated from the impeller, and the impeller is provided with a positioning part which can be blocked by the elastic part when the elastic part deforms under the impact of water flow when the impeller rotates. According to the utility model, the blades are divided into the fixed parts and the elastic parts, the fixed parts are connected with the impeller seat, the elastic parts bend and extend in the direction far away from the center of the rotor frame and can elastically deform and displace when being impacted by water flow, and the elastic blades flexibly deform to absorb local impact load, relieve root stress concentration and reduce fatigue fracture risk; therefore, the rotor is large in lift, large in drainage flow, high in efficiency and long in service life.