21results about How to "Avoid partial wear" patented technology

The application discloses a kind of automatic cleaning device for shield machine cutter, it is related to tunneling equipment technical field, including including shield machine main body and cutter head body, the cutter head body is arranged on the surface of shield machine main body, the side annular array of shield machine main body is close to cutter head body and is provided with several water pipe grooves, the inside of water pipe groove is all fixedly connected with water outlet cavity, the inside of shield machine main body is located on the side of water outlet cavity away from cutter head body and is provided with annular water storage chamber, the annular water storage chamber is used to store water.The application can flush cutter and cutter head in real time when shield machine is normally tunneling, just remove in time when sundries is just attached, block mud cake formation and muck jam from source, continuously keep the surface of cutter clean, avoid cutter jam and eccentric wear problem from root.

A loader frame articulation structure, belonging to the field of engineering machinery, includes a front frame and a rear frame, connected by an articulation assembly. The articulation assembly includes an articulation shaft, which is fixedly mounted on the front frame, and the rear frame is rotatably connected to the articulation shaft. The articulation shaft includes a cylindrical portion and a truncated cone portion. The truncated cone portion is fixedly mounted on the upper end of the cylindrical portion and installed within an articulation hole in the front frame. A mounting plate is mounted on the upper end of the truncated cone portion, and the mounting plate is fixedly connected to the front frame by bolts. The cylindrical portion is rotatably connected to the rear frame, and the lower end of the cylindrical portion is connected to the articulation hole on the front frame via a bushing. The use of a conical surface fit at the loader's articulation structure significantly improves the assembly accuracy and connection strength at the articulation point, thereby solving the connection strength problem at the articulation point under extreme working conditions and the fatigue wear problem caused by the increasing use time of the loader, effectively reducing the failure rate of the loader product.

The utility model provides a kind of rhythmic vibration machine, it is related to fitness equipment technical field, including base, lower support, upper support and pedal, lower support is fixed with base, upper support is fixed with pedal, and lower support is equipped with rhythmic module, including drive motor, pivot and the cam connected with pivot by eccentric bearing, drive motor drives pivot by transmission mechanism, drives cam to make upper support rhythmic up and down;Meanwhile, vibration module is equipped on the side of upper support away from drive motor, for generating high-frequency vibration. By efficiently integrating rhythmic and vibration function in one, compact structure, and the stability of both simultaneous operation is improved by effectively avoiding motion interference with the layout of the two, so that users can simultaneously obtain the dual effect of full-body rhythmic exercise and local muscle deep relaxation.

A brake handle with a dynamically variable rotation center in the braking process comprises a brake shell, a piston assembly, a push rod assembly, a brake handle, a multi-fulcrum linkage component and a rotation switching mechanism. The shell is provided with a piston cavity. The handle drives the piston to move through the push rod. The linkage component is provided with two rotating fulcrums, and the switching mechanism can switch two working states. When the front section of the handle is pinched, the handle rotates around the first fulcrum, idle stroke is eliminated, and operation is labor-saving. When the rear section is pinched, the second fulcrum is switched to rotate, and the lever ratio is increased to improve braking force. By means of automatic switching of double fulcrums, labor-saving control and large braking force output are both considered, and the problem that a traditional hydraulic brake handle is poor in performance is solved; the modular structure is easy to adapt to mass production, and switching nodes are accurate and controllable; a locking and failure protection structure is arranged, so that the operation is stable and safe; meanwhile, eccentric wear of parts is eliminated, the service life of sealing pieces is prolonged, and braking efficiency and use safety are improved.

The utility model belongs to the field of automobile engineering, and particularly relates to an automobile brake caliper structure which comprises a shell, a first connecting rod is fixedly connected to the top of the shell, a hydraulic hole is formed in the surface of the shell, and a transmission mechanism is arranged in the shell. The transmission mechanism comprises two sleeves fixedly connected to the two sides of the interior of the shell, the interiors of the two sleeves are both slidably connected with sliding rods, one end of each sliding rod is slidably connected with a brake pad, a buckle mechanism is arranged in each sliding rod, and the buckle mechanisms are used in cooperation with the brake pads; by arranging the transmission mechanism, the brake pads on the two sides of the floating type brake calipers can almost simultaneously and evenly press the brake disc, eccentric wear of the brake disc caused by braking force loss generated by successive contact of the brake pads is avoided, replacement of new and old brake pads can be completed by arranging the buckle mechanism without disassembling chassis components, and the replacement efficiency is improved. And the maintenance cost and the time cost of the vehicle are reduced.

This utility model provides an integrated braking device for a suspended bogie, belonging to the field of railway vehicle technology. It includes a braking assembly, a transmission assembly, an air drive assembly, and a suspension assembly. The braking assembly includes a first brake beam and a second brake beam spaced apart. The transmission assembly includes a first push rod, a second push rod, a first transmission member, and a second transmission member. One end of both the first and second push rods is hinged to the second brake beam. The first and second transmission members are located at opposite ends of the air drive assembly. The first transmission member is hinged to the air drive assembly, the first brake beam, and the first push rod, respectively. The second transmission member is hinged to the air drive assembly, the first brake beam, and the second push rod, respectively. The first and second brake beams are connected to the bogie crossbeam via the suspension assembly. This utility model reduces the bogie's lower mass, improves the vehicle's dynamic performance, and also enhances the vehicle's braking and release performance.

The application provides a self-cleaning hob of a disc cutter assisted by a cavitation water jet, which comprises a hob side plate, a disc cutter and a cleaning component; the disc cutter is arranged between the two hob side plates through a cutter shaft, the two ends of the cutter shaft are detachably arranged on the two hob side plates, and the disc cutter can rotate around the cutter shaft; the cleaning component is rotatably arranged on the side of the cutting edge of the disc cutter and can clean the cutting edge of the disc cutter; the disc cutter is provided with a transmission assembly, the transmission assembly is in transmission connection with the cleaning component; the transmission assembly can rotate together with the disc cutter, so as to drive the cleaning component to rotate; the scheme provided by the application can fundamentally improve the tunneling efficiency, solve the problem of mud accumulation of the cutter head of the tunneling machine, reduce the eccentric wear of the cutter ring, prolong the service life of the cutter, shorten the construction period and reduce the engineering cost, so as to achieve the purpose of reducing the construction burden and make up for the deficiency of the existing mud accumulation response measures of the cutter head.

This invention provides a straightening guide for a screw pump sucker rod, comprising: a housing; a plurality of straightening blocks evenly arranged on the outer surface of the housing; a top rod concentrically arranged inside the housing, with ball heads at both ends of the top rod; and connector assemblies disposed at both ends of the housing for connecting an upper sucker rod and a lower sucker rod, respectively. The connector assemblies include a ball-and-socket type connecting seat fixedly connected to the end of the housing and a ball-and-cap connector adapted to the ball-and-socket type connecting seat. The inner wall surface of the ball-and-socket type connecting seat is constructed as a first inner spherical surface, and an inner drive tooth is provided on the first inner spherical surface. The ball-and-cap connector includes a ball-and-cap body, the outer surface of which is provided with radially extending outer drive teeth, and the interior of the ball-and-cap body forms a second inner spherical surface adapted to the ball head. The outer drive teeth and the inner drive teeth mesh to form a meshing pair, allowing the ball-and-cap connector to bend relative to the housing and to straighten the sucker rod via the straightening blocks.

This utility model discloses a special chopping knife for titanium forging parts, relating to the field of forging equipment technology. The utility model includes a base, with the chopping knife body disposed inside the base; an anti-detachment mechanism is provided on one side of the base, comprising a fixed box fixedly connected to one side of the base, and a fixed cylinder disposed inside the fixed box. This utility model, through the synergistic effect of the worm gear transmission and the mechanical interlocking of the locking rod and locking hole in the anti-detachment mechanism, effectively prevents the mounting bolts from loosening due to vibration. The self-locking characteristic of the worm gear ensures that the locking rod will not rotate on its own due to reverse load after locking, while the structure of the locking rod inserting into the locking hole of the limiting disc forms a physical limit, providing double protection for installation stability and avoiding safety accidents caused by the chopping knife falling off. The transmission design of the first bevel gear and the second bevel gear in the drive mechanism converts the rotational motion input from the handle into the axial drive of the worm gear.

This application relates to the field of overhead contact line accessories technology, and provides an overhead contact line compensation device. The device includes: a pulley block equipped with a compensation rope, one end of which extends to the outside of the pulley block to form a connecting section for connecting a weight; a connecting frame mounted on the pulley block; and a limiting part fixed to the connecting frame, forming a limiting channel extending vertically through the limiting part. The connecting section passes through the limiting channel to restrict the horizontal movement of the compensation rope relative to the pulley block. When the weight swings, the limiting channel restricts the horizontal swing amplitude of the connecting section; when the pulley block swings, the limiting part swings with the pulley block via the connecting frame, and the inner wall of the limiting channel pushes the connecting section to swing with the pulley block, ultimately limiting the range of movement of the compensation rope relative to the pulley block, preventing uneven wear between the compensation rope and the pulley block grooves, and improving the lifespan and reliability of the overhead contact line compensation device.

The utility model relates to a tread pattern structure of a medium-short distance all-steel truck radial tire, which is characterized in that three rows of Z-shaped zigzag grooves in the same direction are distributed on a tire tread along the circumferential direction of the tire tread, and main pattern blocks with irregular pentagonal structures are distributed between the adjacent Z-shaped zigzag grooves to form two rows of blocky pattern columns; an inclined shallow groove is formed between every two adjacent main pattern blocks in each row. And the main pattern blocks in the block-shaped pattern columns on the two sides of the central zigzag groove are reversely arranged in a staggered manner along the circumferential direction. A plurality of stone discharging blocks are arranged at the bottom of the Z-shaped zigzag ditch in the extending direction of the Z-shaped zigzag ditch, and the stone discharging blocks comprise main stone discharging blocks and auxiliary stone discharging blocks which are sequentially and alternately connected. A plurality of knife-shaped shallow grooves are evenly distributed in the shoulder portions of the tire tread, a plurality of block-shaped heat dissipation square grooves are evenly distributed below the two shoulder portions of the tire tread, and a plurality of exhaust holes are evenly distributed in the peripheries of the main pattern blocks. Compared with the prior art, the tire tread pattern structure disclosed by the utility model has the advantages of low rolling resistance, strong road holding force, good stone discharging performance and the like.

A marine motor with eccentric end cover, comprising a frame, an end cover connected to the frame, a stator connected to the end cover in the frame, a bearing connected to the end cover, a rotating shaft connected to the bearing through a bearing bush, and a rotor corresponding to the stator and arranged on the rotating shaft; the axial center of the end cover is offset relative to the axial center of the rotating shaft, and the fit clearance between the bearing bush and the rotating shaft and between the stator and the rotor is adjusted by adjusting the offset degree of the end cover relative to the rotating shaft. The invention solves the problems of uneven distribution of bearing clearance and stator-rotor air gap caused by the self-weight sag of the rotating shaft in the traditional concentric end cover type marine motor, complicated assembly and debugging, and difficult on-site clearance correction.

The utility model provides a guide tow dual -purpose truck tire belongs to tire technical field, including the tread, the tread includes a plurality of middle part longitudinal grooves and edge part longitudinal grooves which are set up along the circumferential extension, the middle part longitudinal groove and edge part longitudinal groove divide the tread into a plurality of pattern bars, the pattern bar includes the middle part pattern bar at the tread center line, a plurality of oblique through -going horizontal grooves are set up on the middle part pattern bar, the third horizontal steel sheet of horizontal through -going is set up between adjacent horizontal grooves, wherein, the angle of horizontal groove and tire axial is 40 ~ 45 DEG, the depth of horizontal groove is 1 / 3 ~ 1 / 5 of the depth of middle part longitudinal groove, the width of horizontal groove is 1mm ~ 4mm. The utility model tire product considers high load, torsion resistance, wear resistance, steering nimble and stronger ground adaptability simultaneously, improves the engagement performance and tow performance of tire on the wet and slippery road surface.

The utility model relates to the technical field of automobile sliding doors, in particular to a sliding door limiting device and an automobile, the sliding door limiting device comprises a convex block assembly and a concave block assembly, the convex block assembly comprises a convex block base, a first boss arranged on the convex block base in a protruding mode and a second boss arranged on the first boss in a protruding mode, the concave block assembly comprises a concave block base, a third boss and a groove, the third boss is arranged on the concave block base in a protruding mode, the groove is formed in the third boss, a buffering assembly connected with the third boss in a sliding mode is arranged in the groove, and the second boss can be clamped in the groove and abuts against the buffering assembly. By limiting the concave-convex block, eccentric wear of the contact position of the concave-convex block is avoided, and the abnormal knocking sound of the concave-convex block of the vehicle door when the vehicle passes through a bumpy road section is eliminated.

The utility model discloses a multi-blade band saw machine which comprises a machine frame, a first band saw wheel and an adjusting plate, and the machine frame is provided with a first installation position and a second installation position. The first band saw wheel is installed on the machine frame in a penetrating mode through a rotating shaft. One end of the rotating shaft is mounted on the first mounting position through a first connecting assembly, and the other end of the rotating shaft is mounted on the second mounting position through a second connecting assembly; and when the position of the adjusting plate is adjusted, the adjusting plate and the first connecting assembly form wedge block movement so as to adjust the height of one end of the rotating shaft relative to the other end of the rotating shaft, and then the heights of the two sides of the belt wheel are changed. Therefore, wedge block movement is formed through the adjusting plate and the first connecting assembly, the first band saw wheel can be kept horizontal, band saw blade displacement caused by inconsistent left and right heights is avoided, the sawing precision and stability in the sawing process are improved, meanwhile, the service life of the band saw blade is prolonged, the equipment maintenance frequency is reduced, and the production cost is reduced.

The invention discloses a high-speed motor centrifugal magnetic adjusting device, which comprises a composite rotating shaft, a magnetic adjusting rotor, a rigid rotor and a magnetic adjusting device, and is characterized in that the composite rotating shaft is divided into a tooth-shaped section with circumferential transmission teeth and an optical axis section with a smooth surface, the magnetic adjusting rotor is sleeved on the tooth-shaped section and can slide along the axial direction, and the rigid rotor is fixed on the optical axis section; the magnetic adjusting devices are arranged on the end face between the magnetic adjusting rotor and the rigid rotor and evenly distributed in the circumferential direction, each magnetic adjusting device comprises a triangular groove piece, a boss piece and a tension ball, and the triangular groove pieces are fixed to the end face of the rigid rotor and provided with guide slopes to form slope sliding rails. The upper end of the boss piece is embedded into a radial groove in the bottom of the flux adjusting rotor, the lower end of the boss piece is in slope sliding fit with the guide slope, and the tension ball is arranged in a spherical cavity in the radial outer end of the boss piece and limited. Centrifugal force is generated through rotation of the tension ball, the centrifugal force is converted into axial component force through the slope sliding rail to push the magnetic field adjusting rotor to move axially, so that the magnetic field coupling strength of the motor is adjusted, and the device is suitable for a wide-speed-range high-speed motor system.

A conveying structure of corn husking equipment comprises a first conveying frame. The first conveying belt is rotatably arranged in the first conveying frame and used for conveying corn cobs; the rotatable baffle is arranged at the tail end of the first conveying belt, and a limiting channel with a gap smaller than the diameter of a corn cob is formed between the baffle and the first conveying belt; the second conveying frame is vertically fixed to the tail end of the first conveying frame and located below the limiting channel; the corn cob conveying device is novel in structure, the limiting channel formed between the rotatable baffle and the first conveying belt can effectively limit the movement track of corn cobs, and it is ensured that the corn cobs enter the subsequent conveying process in the specific posture and direction; when the speed of the first conveying belt is high, the baffles can block and buffer corn cobs, so that the corn cobs well fall to the middle position of the second conveying belt, and the side wall of the second conveying belt is prevented from being impacted; and the baffle can rotate flexibly, the balance and rotation resistance of the baffle can be adjusted by adjusting the number of the magnetic attraction pieces, the working performance of the limiting channel is optimized, and the conveying speed of the first conveying belt is adapted.

This invention relates to the field of large bulk material handling machinery, specifically to a device and method for correcting the deviation of a movable beam in a bucket wheel excavator. The device comprises a movable beam, a trolley, a traveling wheel frame with electromagnets, a magnetorheological elastomer pad, a main drive hydraulic cylinder, cross-connected antagonistic hydraulic cylinders, and a controller. The system calculates the resistance-thrust-stiffness mismatch index through the controller. When the index exceeds a threshold, the electromagnets are triggered to generate an upward suction force to reduce the contact normal pressure on the traveling wheels, and simultaneously reduce the elastic modulus of the pad to release lateral restraint. Its core principle is to utilize electromagnetic attraction and a variable stiffness pad to synergistically reduce drag, which, in conjunction with the main drive hydraulic cylinder, pushes the movable beam for lateral repositioning. This invention abandons the traditional rigid lateral pushing method under heavy loads, significantly reducing the thrust required for lateral repositioning, effectively solving the problems of easy stick-slip jumping and stress concentration, and achieving smooth deviation correction.

The utility model relates to the technical field of automobile braking, in particular to an automobile brake caliper which comprises a caliper body, a return mechanism, a pressure equalizing assembly and a heat dissipation assembly. The return mechanism is matched with the elastic supporting piece through a driving block to realize uniform return of the friction plate; the pressure equalizing assembly optimizes the stress distribution of a push rod through an adjusting block and a pressure plate; the heat dissipation performance of the heat dissipation assembly is improved through the flow guide grooves, the heat conduction pieces and the heat dissipation fins. The problem of return force attenuation is solved through the elastic supporting piece of the multi-layer corrugated structure and the damping coating, stress concentration is reduced through the design of the reset spring, the overall structure simplifies the assembling procedure, cost is reduced, meanwhile, the heat dissipation efficiency is improved, the service life is prolonged, and the requirements for high responsiveness, high stability and long service life of a modern automobile braking system are met; and high practicability and popularization value are achieved.

This invention relates to the field of aero-engine technology and discloses an assembly structure for a rotor and stator, comprising: an mounting groove on the annular inner ring of the stator; an inner ring of a sealing ring serving as a sealing portion and an outer ring serving as a base portion; the base portion overlapping the inner ring of the stator; a through hole adapted to the mounting groove on the base portion; the sealing portion spaced around the rotor; a gap of Δ2 between the sealing portion and the rotor; a connecting assembly passing through the through hole and the mounting groove to assemble the sealing ring onto the stator; the connecting assembly being adapted to adjust the connection length to adjust the axial gap Δ3 between the stator and the sealing ring along the rotor axis, such that Δ3 is half of Δ2. This application, by adjusting the connection length of the connecting assembly, adjusts the axial gap between the stator and the sealing ring to obtain a suitable gap, preventing uneven wear, improving the stability of the aero-engine, extending the service life of aero-engine parts, reducing maintenance costs, and improving the reliability and economy of the aero-engine structure.

The utility model discloses a mobile X-ray machine rack brake structure, and relates to the field of X-ray machine racks, the mobile X-ray machine rack brake structure comprises a rack vehicle body, a rotating shaft is rotatably connected in the rack vehicle body in a penetrating manner, wheels are arranged on both sides of the rack vehicle body, and a brake assembly used for braking the wheels of the X-ray machine rack is arranged outside the rotating shaft; the cams are made to rotate through the pedal, the bearings on the brake rods are moved to the locking grooves of the cams, so that the friction blocks abut against the wheels, the braking effect is achieved, manual fixing is not needed, the use convenience is improved, the cams on the two sides can rotate at the same time through use of the rotating shaft, the two friction blocks make contact with the wheels synchronously, and the braking effect is improved. The braking force is ensured to be uniformly distributed, eccentric wear of the brake pad or reduction of the braking efficiency caused by single-side pressure application is prevented, and the brake rod and the sliding block are fixed and released by using the first stud and the fixing block.