10196 results about "Rack and pinion" patented technology

The invention provides a multi-dimensional supporting leg structure for lightweight steel ring splicing equipment, and relates to the field of tunnel engineering. The mounting base is fixedly connected with the frame, the telescopic driving mechanism is arranged between the mounting base and the supporting leg assembly, the angle adjusting mechanism is arranged between the cylinder barrel and the mounting base, and the self-locking mechanism is used for locking the cylinder barrel and the piston rod when the driving unit fails. The telescopic driving mechanism is composed of a cylinder barrel, a piston rod and a driving unit, the angle adjusting mechanism is driven through a first rotating shaft and a second rotating shaft which are perpendicular to each other and corresponding rotation, so that the cylinder barrel achieves double-shaft swing adjustment, the self-locking mechanism is composed of a locking rack, a movable tooth claw, a reset spring, an electromagnet and a permanent magnet, and power-on unlocking and power-off self-locking are achieved. According to the structure, the supporting polygon is obviously enlarged under the complex basic condition, the anti-overturning stability of equipment is improved, reliable supporting is kept when a hydraulic system fails, and the safety and adaptability of steel ring splicing operation in a tunnel are improved.

The present application relates to the technical field of piano, in particular to a piano pedal system, comprising an external unit and an additional unit; the external unit comprises: an external pedal module comprising at least one external pedal; a data acquisition module for acquiring the pedal data of the external pedal; a height adjustment module comprising a driving mechanism and two supporting mechanisms, the driving mechanism comprising a driving motor, a driving gear fixedly connected with the output shaft of the driving motor and two driving racks, the two driving racks being oppositely engaged on both sides of the driving gear, the supporting mechanisms being one-to-one arranged with the driving racks, the supporting mechanisms being connected between the driving racks and the external pedal module, the driving racks driving the supporting mechanisms to stretch or retract to realize the height adjustment of the external pedal module; the additional unit is used for stepping on the corresponding piano pedal according to the pedal data. The present application can be applied to different types and models of pianos and improve the accuracy and convenience of the height adjustment of the pedal.

The invention provides a multifunctional cycle power generation system and method by a gravity lever. The system comprises a supporting rack and a balance weight arranged on the supporting rack and slidably matched with the supporting rack, wherein engines are arranged on one side or two sides of the balance weight; the input shaft of each engine is connected to a transmission shaft; two or more single-directional clutches are fixedly connected to the middle of the transmission shaft; the locking directions of the single-directional clutches are same, gears are fixed to the peripheries of thesingle-directional clutches, and a rack matched with each gear to drive the transmission shaft to rotate is arranged next to each single-directional clutch; at least one pair of racks is arranged on the upper part and the lower part, separately, the racks and the balance weight which reciprocates are in driving movement and the balance weight is arranged on the supporting rack to swing through a lifting mechanism in a reciprocating manner. As the balance weight which swings in the reciprocating manner pulls the racks to drive the transmission shaft to rotate in the single direction, multiple engines can be driven synchronously to generate electricity synchronously, and the power needed by a supporting rack lifting device is alleviated greatly by means of a swing mode like to a lever, so that the energy sources are saved and the power generation efficiency is improved greatly.

The invention discloses a mahjong machine and a slope tile playing device thereof, which are characterized in that a planet carrier and a planet wheel which rotate actively rotate around a fixed sun wheel, and a tile feeding push rod is driven by the planet carrier, the planet wheel and a turntable to rotate to push and feed tiles; a mahjong lifting swing arm is driven by a planet carrier, a swing rod, a rack and a mahjong lifting gear to swing to drive a mahjong lifting supporting plate to lift mahjong; two transmission paths of a planet carrier and a planet wheel are ingeniously utilized, so that a mahjong feeding push head does not push mahjong tiles when a mahjong tile lifting supporting plate is controlled to descend only through mechanical transmission cooperation by a motor, and the mahjong tile lifting supporting plate does not move when the mahjong tile feeding push head pushes the mahjong tiles; when the tile lifting supporting plate is lifted, the tile feeding pushing head does not push tiles, after the tile lifting supporting plate is lifted, the tile feeding pushing head moves out of the tile storage groove, the lifting action of the tile lifting supporting plate and the tile pushing action of the tile feeding pushing head do not interfere with each other, the structure is simple and reasonable, action connection is good, operation is stable and reliable, the mahjong machine is coherent and smooth in action, noise is low, and the user experience is good.

The invention relates to the field of robot additional shafts, in particular to an additional shaft servo motor type selection method for a robot, which comprises the following specific steps of: S1, determining a transmission system structure at a load end of an additional shaft motor; s2, determining a mechanical structure and motion characteristic parameters of the transmission system; s3, importing into a motor library; s4, performing calculation; s5, judging and checking; s6, model selection is completed; for three mainstream transmission systems of a gear rack, a ball screw and a belt at a load end of a robot additional shaft motor, calculation and accurate model selection are performed on parameters of the motor, and the dynamic response characteristic of the motor and the system compatibility of the model selection method are improved; the model selection tool can support a user to import and modify a motor database by himself / herself, and quickly and conveniently recommend an accurate model selection result from the motor database according to the rotation speed, torque, power and load inertia ratio judgment and check conditions of the motor, thereby improving the model selection efficiency of the servo motor and improving the user experience. And resource redundancy and manufacturing cost caused by a traditional empirical selection method are reduced.

The invention discloses an inspection robot based on property security, and relates to the technical field of inspection robots. Comprising a main body, a buffering assembly is arranged on one side of a buffering plate, an angle adjusting assembly is arranged on one side of a gear, a rotating seat is arranged on one side of the angle adjusting assembly, a stabilizing assembly is arranged at the bottom of the rotating seat, and balance weight balls are arranged on the two sides of the stabilizing assembly. The rack drives a bidirectional screw rod to rotate through meshed gears, the bidirectional screw rod drives a first moving plate and a second moving plate to move bidirectionally, fixed blocks which are arranged on the outer walls of a first connecting rod and a second connecting rod in a staggered mode move to drive a rotating rod which is rotationally connected to move bidirectionally, and then a rotating seat is driven to rotate; the balance weight pressure is increased towards the rear wheels, the positive pressure of the rear wheels is improved, then the road holding force is increased, and uphill interruption or backward sliding is prevented.

The invention belongs to the technical field of bridge construction, and particularly relates to a single-point multiple-jack synchronous beam falling forced displacement method prestress applying method which comprises the steps that S1, a plurality of temporary supporting points are arranged beside a permanent support, and a self-locking type beam bearing mechanism is installed on each temporary supporting point; meanwhile, a hydraulic jack is arranged at each temporary supporting point, the multiple hydraulic jacks are connected to a PLC integrated hydraulic synchronous control system through hydraulic pipelines, and synchronous linkage mechanisms are arranged among the multiple hydraulic jacks. According to the single-point multiple-jack synchronous beam falling forced displacement method prestress applying method, when an inner jacking pipe sleeve pushes a supporting cushion block to ascend and descend, through meshing of a self-locking gear and two self-locking racks, a secondary telescopic block can be forcibly driven to move synchronously, so that continuous stretching and retracting of a bearing beam are achieved, the cushion block does not need to be manually replaced after single beam falling, and the working efficiency is improved. The system automatically adjusts the height to meet the multi-stroke circulating beam falling requirement, and the construction efficiency is improved.

The invention relates to the technical field of electric foam die cutting, and provides a conductive foam positioning die cutting device which comprises a conveying assembly, a height adjusting assembly, a fixing assembly and an adjustable cutting assembly, the conveying assembly is composed of a conveying base and a conveying belt, and the conveying belt is installed on the conveying base. The height adjusting assembly is arranged at the top of the conveying assembly and used for adjusting the cutting height, and through arrangement of the adjustable cutting assembly, a transmission motor, a servo motor and other structures, the transmission motor is used for driving a meshing gear to accurately move along an arc-shaped rack; and meanwhile, the servo motor adjusts the tension of the cutting wire in real time through the take-up reel, so that the device can adapt to complex cutting tasks with different shape requirements, the flexibility and adaptability of equipment machining are improved, and the problems that in the prior art, the flexibility is poor, and the positioning precision is insufficient are solved.

The invention discloses an air jet loom reed defect detection device, and relates to the technical field of detection, the air jet loom reed defect detection device comprises a support table, a rotating shaft is rotatably connected in the support table, the surface of the rotating shaft is fixedly sleeved with a clamping gear, and the surface of the rotating shaft is movably sleeved with two torsion springs; the opposite ends of the two torsion springs are fixedly connected with the two sides of the clamping gear, so that the upward moving distance of the lifting rack is larger than the upward moving distance of the telescopic outer rod, then the lifting rack drives the rotating gear to rotate in a large range, a worker is conveniently reminded of unevenness of a reed wire on the reed, the reed is conveniently detected, and the working efficiency is improved. And meanwhile, a user can conveniently amplify detection data, so that a slight height difference can be conveniently amplified, a worker can be conveniently assisted in watching, the detection convenience is improved, the phenomenon of omission is prevented, and unqualified reeds are prevented from flowing into the market to the maximum extent.

The invention provides a tool applied to the field of petroleum drilling, and particularly relates to an underground non-circular gear intelligent impact tool which comprises a power module, an axial impact module and a circumferential impact module, the power module enables drilling fluid to impact a turbine in a directional mode through a drainage disc, hydraulic energy is converted into mechanical energy, and the mechanical energy is transmitted to the axial impact module. The power is transmitted to the axial impact module and the circumferential impact module, the axial impact module lifts a rack punch hammer to compress a spring through meshing of an incomplete gear and the rack punch hammer, and when the incomplete gear is disengaged from the rack punch hammer, the spring releases energy to generate axial impact downwards. The circumferential impact module is composed of two groups of incomplete gears and racks which are arranged in an up-down 90-degree staggered mode, the rack punch hammer compresses a spring through meshing of the incomplete gears and the rack punch hammer, and the spring is released to generate circumferential impact when the incomplete gears and the rack punch hammer are disengaged. Periodic impact can be achieved, the mechanical rock breaking efficiency is effectively improved, and the stick-slip phenomenon at the drill bit is reduced.

The utility model relates to the technical field of housing construction engineering, and discloses a housing construction engineering positioning and measuring device which comprises a supporting table, a supporting rod is movably connected in the supporting table in a penetrating mode, a measuring instrument is fixedly connected to the upper end of the supporting rod, and a supporting mechanism is arranged on the lower surface of the supporting table. A rack is fixedly connected to the left side surface of the supporting rod, and an adjusting mechanism is arranged on the upper surface of the supporting table and located on the left side of the supporting rod. According to the utility model, in the aspect of height adjustment, through the linkage design of the supporting rod and the rack and the combination of a mechanical locking mechanism of the gear, the ratchet wheel and the pawl, stepless precise adjustment of the measuring instrument is realized, and the motor fault risk and power consumption are avoided; in addition, the rotating rod can be locked through the positioning bolt after adjustment is completed, accidental displacement of the measuring instrument is prevented, and the reliability of the device is further improved. According to the design, through a pure mechanical structure, the height adjusting process is simplified, the maintenance cost is reduced, and the device is particularly suitable for engineering scenes in a power-free environment.

The invention provides a bidirectional synchronous gripper and a gripping method thereof, and relates to the technical field of mechanical equipment.The bidirectional synchronous gripper comprises a base, a guide rail is arranged on the surface of the top of the base, a first connecting block is slidably connected to one side of the guide rail, a second connecting block is slidably connected to the other side of the guide rail, a mounting hole is formed in the surface of the base, and an air cylinder is fixed in the mounting hole; the tail end of a piston rod of the air cylinder is connected with a first connecting block, a first rack is arranged on the side, facing the second connecting block, of the first connecting block in an extending mode and meshed with a gear, and a second rack is meshed with the opposite side, deviating from the first rack, of the gear and fixedly connected with the second connecting block. Clamping assemblies are arranged on the top face of the first connecting block and the top face of the second connecting block correspondingly, the technical problem that long-stroke two-way synchronization precision is insufficient is solved, and the technical effects that long-stroke automatic synchronous clamping is achieved, the overall structure is simplified, and the device is suitable for industrial heavy-load grabbing are achieved.

The invention discloses an automatic installation device for a line lightning arrester, and relates to the technical field of distribution line lightning protection equipment installation, and the device comprises a connection support, a connection support positioning device, a screw tightening device and a wire clamp installation device. The connecting bracket consists of an upper clamping block, a lower clamping block and a screw rod, can be fixed with the lightning arrester on the ground, and can be clamped and fixed with a cross arm without dismantling an insulator; the connecting bracket positioning device drives a gear rack through a motor to drive a C-shaped upper cover plate so as to adapt to limiting and clamping of lightning arresters with different lengths; the screw tightening device enhances the tightening force through gear meshing transmission. According to the device, only three motors and one electric push rod are needed to be installed on the insulation operating rod, live-line automatic installation of the lightning arrester can be achieved, the working efficiency is improved by more than one time, the labor intensity of workers is greatly reduced, and the reliability of power supply is guaranteed.

The invention relates to the field of suturing systems of medical instruments, and discloses a suturing system. The suturing system includes a control handle, a tube, a receiving cartridge, and a needle. The control handle comprises a shell, a driving mechanism and a rotation indicating piece, the rotation indicating piece is rotatably connected to the shell, and a plurality of position marks are arranged on the periphery of the shell. An actuating shaft in the driving mechanism is coupled to a first gear, an actuating pipe is coupled to a second gear, and the first gear and the second gear are arranged in the longitudinal direction and rotate synchronously. When the rack moves longitudinally, the conversion gear can be driven to rotate so as to drive the first gear to rotate, and the first gear and the second gear respectively drive the actuating shaft and the actuating tube to do longitudinal reciprocating motion, so that the needle is alternately combined with the actuating tube and the receiving bin. The driving mechanism in the sewing system is reliable in structure, and the failure rate can be effectively reduced. In addition, the rotation indicating piece is used in cooperation with a position mark arranged on the shell so that the positions of the shell and the driving mechanism after rotation can be indicated, and operation is convenient.

A steering gear for a surgical instrument includes two motorized drives designed to spatially align a wobble plate via the adjustment angle of the two drives, which is designed to control a distal angling mechanism of the surgical instrument. A first of the two drives has a first motor, which drives a drive pinion via a driveshaft, which engages with a lateral toothing of a first toothed rack, driving a first transmission pinion of a first double gear. A second of the two drives has a second motor driving a drive pinion via a driveshaft, which engages with a lateral toothing of a second toothed rack and drives a second transmission pinion of a second double gear wheel. The wobble plate is arranged between the two bevel gear rims, which are facing one another and lie on a common axis.

The invention discloses a pipe welder online inner crator and burr removing equipment device, and relates to the technical field of steel pipe welding, the pipe welder online inner crator and burr removing equipment device comprises a fixing frame, two sliding rails are symmetrically and fixedly mounted at the top of the fixing frame, a plurality of mounting frames and moving frames are slidably mounted at the tops of the two sliding rails respectively, and the mounting frames and the sliding rails are fixed through bolts; and a feeding mechanism, a delivery mechanism and a conveying mechanism are arranged on one side of each of the multiple mounting frames and the movable frame. A second air cylinder, a lead screw and a crank of the high-pressure inner burr blowing mechanism can adjust the position of an air nozzle body, adapt to steel pipes of different specifications and cooperate with a first air cylinder and a lower pressing plate to achieve stable positioning, and inner burrs are efficiently removed; a fourth motor, a sixth gear and a rack of the driving mechanism drive a moving frame to slide along a sliding rail to flexibly adapt to steel pipes with different lengths; a first gear, a second gear and a third gear of the delivery mechanism are linked to drive a first clamping piece on a moving plate to synchronously transfer multiple sets of steel pipes, and it is guaranteed that the rhythms of all procedures are matched.

The invention discloses a wafer clamping mechanism, and belongs to the technical field of semiconductor manufacturing equipment. The wafer clamping mechanism comprises an external clamping mechanism, an internal clamping mechanism and a wafer rotating and transferring mechanism. The internal clamping mechanism integrates four motion functions of lifting, deflection, pitching and rotation. Wherein the gear driving motor drives the L-shaped connecting rod shaft to axially move through a gear rack pair, and then the movement is converted into the swing of the rotating shaft through the connecting rod mechanism, so that the pitching adjustment of the suction cup is realized; the deflection motor drives the overturning shaft through the synchronous belt to achieve deflection movement of the suction cup. The rotating motor directly drives the suction cup to rotate, and the Z-axis moving module achieves accurate positioning in the vertical direction. The external clamping mechanism is responsible for bearing and horizontally rotating the wafer, and the rotary transfer mechanism realizes automatic transfer of the wafer among different stations. According to the invention, the problems of function splitting, low space utilization rate and insufficient clamping stability in the prior art are solved, and multi-degree-of-freedom precise posture adjustment of the wafer can be synchronously realized.

The automatically retractable movable seat frame includes at least one stretching device, including a linkage mechanism, including a driving elastic member, a rotating rack, and a linkage rack, the driving elastic member being assembled between the rotating rack and the linkage rack; a leg mechanism, hinged to a front end of the linkage rack, a drag link being hinged between the rotating rack and the leg mechanism; a seat mechanism, hinged to a rear end of the leg mechanism; and a rotating mechanism, connected to the rotating rack, configured to drive the rotating rack to rotate, so that the stretching device is switched between a sitting position and a relaxing position, in which the driving elastic member stretches and retracts with the rotation of the rotating rack, and the rotating rack is driven to rotate, so that the leg mechanism is folded.

The invention discloses an angle-variable and self-revolution wafer base device, and belongs to the technical field of wafer bases, the angle-variable and self-revolution wafer base device comprises a revolution base, a gear carrier is fixedly connected to the center of the top of the revolution base, and a base is arranged above the gear carrier. According to the cooling device, an external liquid supply device conveys cooling water into the connecting base through a cooling water inlet pipe, inclined blades in the connecting base drive a driving shaft and a double-end protruding block to rotate, a sliding block drives an annular gear and a cooling disc to rotate through a rack, and the rotating cooling disc centrifugally throws out the cooling water; a uniform and dead-corner-free cooling water curtain is formed, the rotation shaft and the adjusting shaft are completely wrapped, the cooling uniformity of the peripheral side of the shaft body is ensured, stable and efficient heat exchange is achieved, sprayed cooling water can cool the revolution seat and the gear carrier at the same time, the influence of the high temperature in the reaction cavity on the device is reduced in an auxiliary mode, and the reaction efficiency is improved. And the operation reliability and the overall performance of the device are obviously improved.

The utility model discloses a shakeout roller device for casting molding sand separation, which is characterized in that an inner cylinder is arranged inside an outer cylinder, the inner cylinder is connected with a first discharge port through a first bearing, the inner cylinder is in a straight cylinder shape, the left side of the inner cylinder is connected with the outer cylinder through a second bearing, a rack is arranged on the circumference of the outer side of the left end of the inner cylinder, and a motor is arranged at the upper part of the outer cylinder; according to the sand shakeout device, the inner cylinder and the outer cylinder are arranged, so that molding sand enters the outer cylinder after being separated, the molding sand is prevented from being accumulated in the inner cylinder, a buffering function is achieved on a casting, the sand shakeout effect is improved, and the molding sand is prevented from being left on the casting; and the device is further provided with first shifting teeth and second shifting teeth which are staggered with each other, molding sand cakes falling into the outer cylinder are crushed, the subsequent crushing treatment procedure of the molding sand cakes is omitted, manpower, material resources and time are saved, the subsequent treatment cost of the molding sand is reduced, and good practicability and applicability are achieved.

The utility model discloses a novel magnetic attraction three-dimensional rail transit toy which comprises a toy car and a plurality of magnetic attraction splicing blocks capable of being spliced into a three-dimensional traffic rail, each magnetic attraction splicing block is provided with a sinking groove, a rack part is arranged in the middle of each sinking groove, and limiting convex edges are arranged on the left side wall and the right side wall of each sinking groove. The bottom of the toy car is provided with an autorotation gear matched with the rack part of the magnetic attraction splicing block, floating limiting pieces are arranged on the left side and the right side of the autorotation gear, and the floating limiting pieces are provided with barb parts matched with the limiting convex edges of the magnetic attraction splicing block. The toy car is novel in structure and ingenious in design, the barb portion of the floating limiting piece of the toy car is located on the lower side of the limiting convex edge of the magnetic attraction splicing block, the driving motor of the toy car drives the rotation gear to rotate through the transmission gear set, and the rotation gear is meshed with the rack portion of the magnetic attraction splicing block. Therefore, the toy car can automatically move along the three-dimensional traffic rail, and the toy car can be effectively prevented from falling off from the three-dimensional traffic rail.

An outboard motor includes a steering mechanism including a pinion located in a central portion of an outboard motor body in a right-left direction and operable to rotate together with the outboard motor body, a rack operable to linearly move to rotate the pinion, and a rack position detector on a first side of the rack opposite to the pinion to detect a position of the rack.

The utility model discloses a geological drilling coring device which comprises a frame body, a placing table is installed on the upper portion of the frame body in a sliding mode, a motor is connected to the upper portion of the placing table through bolts, the motor is connected with a transmission shaft through a belt, a coring barrel is fixedly connected to the bottom of the transmission shaft, and a drill bit is fixedly connected to the bottom of the coring barrel. A cutting-off structure is arranged in the coring barrel and comprises a cavity and a first gear, a sliding block is slidably installed in the cavity, a rack is fixedly installed on the upper portion of the sliding block, a second gear is rotatably installed in the cavity, the second gear is connected with the rack in a meshed mode, and a double-face gear ring is rotatably installed at the upper position in the cavity. The double-face gear ring is connected with the second gear in a meshed mode, the double-face gear ring is connected with the first gear in a meshed mode, and a rotating shaft is fixedly installed at the top of the first gear. According to the geological drilling coring device disclosed by the utility model, a required core sample can be completely stored in the device.

A steering assembly comprises: a steering rack configured to be linearly movable; a nut rotatably coupled to the steering rack, wherein the steering rack linearly moves in association with rotation of the nut; a bearing configured to support the rotation of the nut, the bearing comprising an outer race having a flanged part protruding from an outer surface of the outer race of the bearing; and a rack housing accommodating at least a portion of the steering rack, the nut, and the bearing, and having a groove recessed from an inner surface of the rack housing. The flanged part protruding from the outer surface of the outer race of the bearing is disposed in the groove recessed from the inner surface of the rack housing.

The invention belongs to the field of electro-hydraulic actuators, and particularly relates to a double-cylinder double-acting rotary electro-hydraulic actuator which comprises a box body, a sealing cover provided with a shaft hole is installed at the front end of the box body, a bearing installed in an inner cavity of the box body is arranged behind the sealing cover, and a gear shaft penetrates through the middle of the bearing. The gear shaft is sleeved with a gear. When the gear shaft is driven, the upper oil cylinder and the lower oil cylinder move oppositely, the pistons on the upper portion and the lower portion drive the racks to be meshed with the gears through jacking, stretching and resetting, and the four cylinders are crossed and symmetrical, so that the gear shaft is evenly pushed by the two oil cylinders all the time in the rotating process, operation is very stable, torque output of the gear shaft is increased in a limited space, and the service life of the gear shaft is prolonged. And the double-acting design enables the opening and closing actions to be actively driven by hydraulic pressure, the control response is fast, the position is accurate, and the hydraulic valve is suitable for opening and closing of large-torque valves of ships, chemical engineering and the like.

The invention relates to the technical field of medical apparatuses and instruments, and provides a limb traction device which comprises a traction seat used for fixing a limb of a patient and provided with a mounting via hole and a rotating hole, and the rotating hole and the mounting via hole are arranged at an interval and communicate through a mounting window; the basic shaft is arranged in the mounting through hole in a penetrating manner and is provided with a rack extending in the axial direction of the basic shaft; the driving mechanism comprises a rotating shaft rotationally connected into the rotating hole, a driving gear fixed to the rotating shaft and a clutch locking mechanism arranged on the rotating shaft; the driving gear is positioned in the rotating hole and is meshed with the rack through the mounting window; the clutch locking mechanism is matched with the traction seat, has a locking state and an unlocking state, and is provided with a driving end for receiving driving force; in the locking state, the clutch locking mechanism is in limiting fit with the traction seat to limit rotation of the rotating shaft; when the driving end receives driving force, the clutch locking mechanism and the traction seat are separated from limiting fit to be switched to an unlocking state, so that the rotating shaft drives the driving gear to rotate, and the traction seat is driven to slide along the basic shaft.

The utility model relates to the technical field of sockets, in particular to a desktop lifting socket, which comprises a cylindrical base embedded and fixed in a desk hole, and a socket body provided with at least one socket unit, the outer wall of the cylindrical base is in threaded connection with a locking ring, and the locking ring is used for clamping the cylindrical base on the table hole; the socket body is slidably mounted on the cylindrical base, and the inner wall of the cylindrical base is fixedly connected with a vertically arranged rack; a driving assembly is arranged in the lower end part of the socket body, and the driving assembly comprises a driving motor and a driving gear driven by the driving motor; the driving gear is engaged with the rack, and the driving motor drives the driving gear to rotate forwards and backwards, so that the socket body ascends or descends relative to the cylindrical base. The scheme has the advantages of convenience in operation, simple structure, safety and reliability.

The utility model relates to the technical field of beam-pumping units, in particular to a horsehead receding device of a pumping unit. Comprising a horse head rotationally connected with one end of a walking beam, the horse head comprises two side plates fixedly connected, two lug plates are fixed between the two side plates and fixedly connected through a vertical rotating shaft, the rotating shaft is rotationally connected with one end of the walking beam, a square rod is arranged on the walking beam in a sliding mode, and a telescopic rod can drive the square rod to slide. A fixing rod is fixed to the lower end of the square rod, a push rod is fixed to the lower end of the fixing rod, a rack is fixed to the end, away from the fixing rod, of the push rod, and a gear ring is concentrically and fixedly arranged on the rotating shaft in a sleeving mode. The electric telescopic rod drives the square rod to slide, manual climbing operation is not needed, and potential safety hazards of climbing operation in a traditional device are thoroughly eliminated.

The invention discloses a steel structure butt welding adjusting device which comprises a supporting plate and supporting rods fixed to the four corners of the bottom of the supporting plate. A grinding part is arranged in the butt joint mechanism, in the butt joint process of the two steel structure bodies, the grinding part can make contact with the steel structure bodies along with continuous movement of a driving part, the grinding part comprises a coarse grinding plate, a fine grinding plate and a polishing plate, in the grinding process, a sliding plate slides on the top of a supporting plate along with a mounting plate driven by the driving part to move, and the grinding plate is in contact with the grinding part. The rough grinding plate firstly makes contact with the rotating steel structure main body and conducts comprehensive rough grinding on the end face of the steel structure main body through rotation of the steel structure main body, and due to the fact that a second gear at the bottom of a lead screw is meshed with a second rack at the bottom of a mounting shell, the lead screw can rotate, and therefore when a grinding piece moves to a certain degree, the grinding piece can rotate. And the rough grinding plate, the fine grinding plate and the polishing plate can sequentially treat the steel structure body and then move downwards into the second mounting frame.