45results about How to "Has a boosting effect" patented technology

The invention discloses a clothing processing device. The device comprises a door cover and a device body, the door cover is connected with the device body through a hinge structure, and the hinge structure comprises a stopping damping hinge and an assistance damping hinge; the stopping damping hinge comprises a hinge base, a first shaft which is fixedly connected with the hinge base and a dampingdevice which is rotatably connected with the first shaft, and a stopping device which controls the door cover to be positioned at different angles is arranged on the contact portion between the firstshaft and the damping device; the assistance damping hinge comprises a mounting part which is fixed on the hinge base, a second shaft of which one end is fixed to the mounting part and a rotation part which can rotate around the second shaft and is fixedly connected with the door cover, a torsional spring sleeves the second shaft, one end of the torsional spring is connected with the end, away from the mounting part, of the second shaft, and the other end of the torsional spring is connected with the rotation part, so that the torsional spring generates application force. According to the clothing processing device, the door cover can be stopped at any angle, and the effects of free slowing-down in closing and assistance in cover opening can be achieved.

The present invention relates to a double-link overturning platform, which comprises an overturning platform top and an overturning system driving the overturning platform top, and wherein, the overturning system is composed of a platform top pitching mechanism and a platform top turning mechanism. The platform top pitching mechanism consists of a bench, two main motors, two decelerators, two couplings, two fixed seats, four fixed hinges, two small gears, two big gears, two big gear steady bearings, two lower link hinges, two links, two upper link hinges, a coordinating rod, a coordinating rod hinge, an overturning bench connecting seat, an overturning bench and two upper bench hinges. The platform top turning mechanism consists of a platform top rotating motor, a small platform top rotating gear, a large platform top rotating gear, a rotating platform top and a main shaft. The present invention utilizes the driving of the main motors and the platform top rotating motor to realize the overturning movement of a workpiece on the rotating platform top, the structure is simple, the platform top pitching mechanism has a force-increasing effect, the self-locking protection can be realized at an ultimate overturning position, and the present invention can realize the overturning of large-tonnage workpieces.

The invention relates to a symmetrical toggle rod pressure transmission mechanism belonging to the field of connecting bar transmission mechanisms. The toggle rod pressure transmission mechanism comprises toggle rod mechanisms, a drive block, a slide block and a rack, wherein two toggle rod mechanisms are symmetrically arranged at both sides of an axis of a drive rod positioned in the center of the mechanism; each toggle rod mechanism comprises an upper toggle plate, a lower toggle rod and a middle connecting bar, wherein the upper toggle plate is respectively connected with the lower toggle rod, the middle connecting bar and the rack through a toggle rod hinge, a connection hinge and an upper beam hinge, the other end of the lower toggle rod is connected with the slice block through a slide block hinge, and the other end of the middle connecting bar is connected with a driving slide block through a driving hinge; and a segment taking the axle centers of the two connection hinges as endpoints is always intersected with a straight line passing through the axle center of the upper beam hinge and the axle center of the toggle rod hinge positioned at the same side with the upper beam hinge. Compared with the traditional symmetrical six-bar mechanism, the invention has good force-increasing effect, relative uncomplicated stress of a load-bearing shaft, difficult breakage, low total height of the mechanism, and the like.

The invention relates to a toggle lever pressure transmission mechanism, belonging to the field of connecting rod transmission mechanisms; the toggle lever pressure transmission mechanism comprises toggle lever mechanisms, a driving block and a sliding block. Each toggle lever mechanism comprises an upper toggle plate, a lower toggle rod and a middle connecting rod. The upper toggle plate is respectively connected with the lower toggle rod, the middle connecting rod and a machine frame through a toggle rod hinge, a connecting hinge and an upper beam hinge, the other end of the lower toggle rod is connected with the sliding block through a sliding block hinge, the other end of the middle connecting rod is connected with the driving block through a driving hinge; in each toggle lever mechanism, a line segment taking axes of the driving hinge and the connecting hinge as the end points, and a straight line passing through the axes of the upper beam hinge and the toggle lever hinge are in the same plane and maintain not to be intersected in the whole working process of the mechanism. Compared with the symmetrical six-bar linkage mechanism, the toggle lever pressure transmission mechanism has good reinforcement effect, relatively-uncomplicated force application of the load bearing shaft, is not easy to be broken and has low mechanism overall height.

The invention relates to a diagonally driven connecting rod pressure drive mechanism, belongs to connecting rod drive mechanisms, and solves the problems of the traditional pressure drive mechanism that a force boosting effect is not obvious and a slide block side force cannot be eliminated. A connecting hinge, a driving hinge and a slide block hinge are fixed on a middle frame of the drive mechanism, wherein the connecting lines among the axle centres of the three hinges form an isosceles right triangle; two ends of the connecting rod are connected with a machine frame and the middle frame respectively through an upper cross beam hinge and the connecting hinge; a driving source is connected with the machine frame through a fixed support hinge; a main driving rod is connected with the middle frame through the driving hinge; and a slide block is connected with the middle frame through the slide block hinge. The diagonally driven connecting rod pressure drive mechanism of the invention has the characteristics of a hydraulic drive mechanism as well as the characteristics of crank connecting rod drive and toggle rod drive mechanisms, and has the force boosting effect; the mechanism can work with a rated load in most of the travel range of slide block movement, wherein the slide block has a very weak side force to a guide rail in the whole travel range of movement, can move at a changeable speed and can maintain pressure at a lower dead centre; and the mechanism is applied to the pressure drive of press machines or fixtures.

The invention discloses a control device for achieving C arm system follow-up motion. The control device comprises active driving elements, an auxiliary control handle, an infrared switch and a force sensor. All joints of a C arm system are provided with the active driving elements, the auxiliary control handle is connected with the C arm system through the force sensor, and the infrared switch is arranged on the auxiliary control handle. In the starting state, the force sensor obtains operating intentions and transmits commands to the active driving elements of all the joints, and the active driving elements drive the joints of the C arm system to move. According to the control device for achieving C arm system follow-up motion, an operator only needs to apply a little force to flexibly and naturally operate a C arm so as to accurately complete expected motion and positioning according to the will of the operator, and therefore intuitive, simple, accurate and efficient operation is achieved.

The invention relates to a connecting-rod pressure transmission mechanism of an intermediate connecting plate, belonging to the field of a connecting-rod transmission mechanism. The connecting-rod pressure transmission mechanism comprises two connecting rod mechanisms, a driving block, a sliding block and a machine frame, wherein the two connecting rod mechanisms are symmetrically arranged at the two sides of the axis of a diving rod in the center of the mechanism; each connecting rod mechanism comprises a frame connecting rod, a lower connecting rod and the intermediate connecting plate; the intermediate connecting plate is respectively connected with the driving block, the frame connecting rod and the lower connecting rod by a driving hinge, an upper hinge and a lower hinge; the other end of the lower connecting rod is connected with the sliding block by a sliding block hinge, and the other end of the frame connecting rod is connected with the machine frame by a machine frame hinge. Compared with a present symmetrical six-link mechanism, the connecting-rod pressure transmission mechanism of the intermediate connecting plate has the characteristics of high idle stroke speed and short single-trip time under the condition of equivalent force-increasing effect so as to well adapt to high-speed working, and has the advantages of relatively non-complex force bearing of a load-bearing shaft, hard breaking-off and small total height of the mechanism.

The invention relates to an electronic mechanical and hydraulic two-purpose brake, relating to the technical field of brake devices in automobile safety systems. The electronic mechanical and hydraulic two-purpose brake can be connected in parallel with an electronic mechanical brake system and a hydraulic brake system for use, and can be used independently in one mode. A central hole is arranged at the end surface of a hydraulic cylinder and brake caliper assembly (10) of a traditional hydraulic brake system, and an electronic mechanical driving mechanism which directly pushes a piston (9) to work is additionally arranged. The electronic mechanical and hydraulic two-purpose brake comprises a bearing seat (4) and a moment input shaft (1), wherein the moment input shaft (1) is installed in the bearing seat (4) through a thrust bearing (2); the moment input shaft (1) pushes a thrust rod (8) with a wedge-shaped end surface through a force transfer steel ball (3) with an embedded end surface; the thrust rod (8) is installed in the central hole at the end surface of the hydraulic cylinder and brake caliper assembly (10) through a key (5) and contacted with the piston (9); and the bearing seat (4) is fixedly connected with the hydraulic cylinder and brake caliper assembly (10). The brake has the advantages of simple structure, high respond speed and high reliability.

The invention discloses a composite multi-crank rocker mechanism for a roll crusher. The mechanism is characterized in that a unique crushing cavity is formed by a crusher roll and a cambered crushing wall; and a composite multi-crank rocker mechanism for driving the crushing wall to perform crush movement is designed. The core technology of the invention is as follows: the crusher roll is matched with the cambered crushing wall to form the crushing cavity, and the crushing cavity is matched with the composite multi-crank rocker mechanism for design crushing force which has 'shear crushing', 'selective crushing' and other advanced crushing mechanisms.

The invention relates to an energy-saving power increase transmission device, which comprises a motor, a speed increase driving gear on the motor output axle, and a driven gear mounted on the power output axle, while said driving and driven gears are meshed. Said speed increase driving gear comprises a disc mounted on the motor output axle and a gear flywheel eccentrically sheathing the motor output axle; wherein the gear flywheel is formed by the inner ring and the outer ring whose end has gear tooth; the disc along the circumference has several radial projected movable dial rods while the outer end of each dial rod is connected to the outer ring of gear flywheel. The invention uses the eccentric and lever theories, to increase the large torque in the same speed of motor. The invention can reduce the power of motor but outputting same torque.

A numerical control turret punch press relates to the technical field of numerical control turret punch press automation. The numerical control turret punch press is compact in structure, high in reliability and convenient to use, conveniently detects the wear condition of a die based on a visual inspection technology under the condition of reserving the main body structure of the original turret punch press, can rapidly change the die after detection, and has high automation degree. When a cam disc rotates, a die changing device drives a clamping jaw to make linear reciprocating movement along a radial sliding hole through an arc-shaped cam groove, so that the die below a guide plate can be conveniently and efficiently grabbed or released. The work efficiency is high, and the stability is great. A die wear detection device and the die changing device are effectively arranged, the technical problem in the prior art that the wear condition of the die cannot be detected or judged is effectively solved, and after detection, the die out of the wear standard can be conveniently, efficiently and rapidly taken out and changed. As a whole, the numerical control turret punch press has high automation degree, great use effect and high work efficiency.

The invention discloses a double pendulum rod compound holder, which comprises a front baffle, an upper slip segment, a lower slip segment, a lead screw, a compression bar, a compression bar pin roll, a pendulum rod, a pendulum rod pin roll, a mandril pin roll, a mandril, a side plate, a back baffle, a piston, elastic devices, a cylinder and a base. A force-applying device and a stress device of the double pendulum rod compound holder adopt the upper and lower double-layer design, and thus the size of the holder in the length direction is reduced. The left and right oil cylinders of the holder are internally provided with a set of elastic device respectively, pretightening force of the elastic devices are transmitted to the slip group by virtue of the lever principle, and thus a drill pipe is clamped. The power arm of a lever is larger than the resisting arm, so the holder has the function of increasing force. The slip group comprises the left and right slips, each slip is composed of the upper slip segment and the lower slip segment, and the slips are connected through the lead screw. Under the state that the holder clamps the drill pipe, the lead screw for connecting the slips is disassembled, the upper slip segment of each slip is removed, and thus the drill pipe is taken out. The double pendulum rod compound holder has a small external dimension and large opening, so the field use is facilitated.

The invention discloses a gear machining and fixing tool. The gear machining and fixing tool comprises a clamp and is provided with a pressure head, a screw, a rotary handle and a nut, the nut is provided with an outer thread and in threaded connection with the clamp, the outer thread of the nut rotates in the direction reverse to the thread on the screw, the screw is in threaded connection with the nut, the lower end of the screw is provided with a joint, the pressure head is connected at the lower end of the joint, the joint is provided with a radial through hole along the screw, and the rotary handle is fittingly inserted into the through hole. The gear machining and fixing tool is sufficient in clamping force during machining a gear.

The invention discloses an air pumping system applied to a building and belongs to the technical field of building ventilation. The air pumping system comprises a ventilation pipe, a spraying device,a hollow rotating shaft, a bearing, a guiding structure, filter structures and a protecting branch pipe. The ventilation pipe stretches from the top of the building into a base layer, ventilation branch pipes communicating with the ventilation pipe are arranged inside the building, and end ports of the ventilation branch pipes are connected with the filter structures; the ventilation pipe communicates with the protecting branch pipe; the spraying device is provided with a vacuum cavity with the vacuum condition; one side face of the vacuum cavity communicates with an outlet pipe, and the outlet pipe corresponds to a thin end port of a contracting pipe; the hollow rotating shaft is fixed through the bearing fixed to the building, and the inner wall of the lower portion of the hollow rotating shaft is connected with the outer wall of the ventilation pipe in a clearance fit mode; and the upper portion of the hollow rotating shaft communicates with the vacuum cavity, and the top of the spraying device is fixedly connected with the guiding structure. According to the air pumping system, air in a unit space inside the building is pumped out to the top of the building through an air powersource on the top of the building, and the air exchange speed of the unit space and the exterior of the building is increased.

The invention provides a lifting device for a rolling brush of a small electric sweeper, comprising a bracket, chain wheels, nuts, a chain, a direct-current motor, a lead screw and a bearing block, wherein the chain is arranged between the chain wheels, the direct-current motor is connected with the chain wheels, the lead screw is connected with the chain wheels and the nuts, the bearing block is connected with the lead screw, guide rails are arranged on two ends of the bracket, and the bearing block is arranged between the guide rails of the two ends. The lifting device for the rolling brush of a small electric sweeper, disclosed by the invention, has the following technical effects that: (1) when the rolling brush goes up or down, a spiral transmission mechanism consisting of the nuts and the lead screw has a reinforcement function, and enables a lifting track of the rolling brush to be vertical to the ground so as to reach high-efficiency energy-saving purposes; (2) synchronous lifting of two ends of the rolling brush is realized by utilizing transmission of a chain and two spiral transmission mechanisms so that contact pressure of the rolling brush and the ground is balanced axially, and a sweeping effect of the rolling brush is improved; and (3) a vertical lifting action of the rolling brush is realized by utilizing a spiral transmission mechanism, the location is exact, the external impaction resistance is strong, the operation is stable, and the noise is low.

The invention discloses an ice remover for an overhead transmission line, and aims to solve the problem of poor stability in the prior art. The ice remover comprises a rotating motor and a wire port, one side of the rotating motor is provided with a driving box, the wire port is installed below a fan, the left side of a bottom shell is provided with a feeding box, and the left side of a crushing box is provided with a sleeve. A cone is arranged on the left side of the screw pipe, a first hydraulic disc is arranged in the driving box, a belt is arranged on the right side of a second hydraulic disc, and a driving wheel is arranged in the feeding box. The ice remover is provided with the chuck, the sleeve, the cone and the screw tube so that stable clamping can be achieved, the deicer is further provided with the guide wheel, the movable rod and the first spring so that guiding traction can be achieved, and meanwhile the deicer is provided with the sharp hammer, the main rod, the cam, the lifting motor, the sliding plate, the sliding rod and the second spring so that breaking can be thorough; and a rotating motor, a first hydraulic disc, a second hydraulic disc, a belt and a fan are arranged, so that transmission assistance and accumulated snow removal can be carried out.

The invention discloses a steering device for an electrical children's cart, which is characterized in that: the first input ends of double power driving wheels are connected with the output end of a first driving motor; the second input ends of the double power driving wheels are connected with the output end of a second driving motor; the output end of a first linkage steering structure is connected with the input end of the first driving motor; and the output end of the second linkage steering structure is connected with the input end of the second driving motor. The device is reasonable in entire structure and can realize 360-degree omnidirectional guided rotation by adopting double power driving motors. The device has the advantages that: steering operation and control are sensitive; a double power effect can be achieved; the driving part also has a self-braking unit, so the safety of the product is improved; the overall structure is reasonable, and the practicality is high; and substantial characteristics are more prominent and improvement is more obvious than those of the prior art.

The invention discloses a combined-type clamping device used for a clamping drill rod of an underground drill rig. The device comprises an insertion sleeve, an outer baffle, an inner baffle, a clamping tile, an inner slope drive block and an outer slope drive sleeve, wherein the outer baffle and the inner baffle are firmly installed in sequence on the outer side of the left end of the insertion sleeve; a protective shell is disposed on the outer side of the inner baffle; the clamping tile is installed in the middle of the insertion sleeve in a sliding manner; the upper end of the clamping tile is firmly connected to the lower end of the inner slope drive block; the outer slope drive sleeve is disposed on the outer side of the inner slope drive block in a sliding manner; a bearing used to reduce relative friction force is disposed between the outer slope drive sleeve and the inner baffle; the right end of the insertion sleeve is firmly equipped with an end face cover plate by a drive threaded sleeve; and a compressing spring is disposed between the end face cover plate and the outer slope drive sleeve. The device disclosed by the invention is characterized by rational design, a simple structure, convenient use, a small volume, a light weight, convenient assembly and disassembly and good clamping effects.

A pole and tower foundation slope protection drawing automatic forming system comprises a pole and tower environment foundation database, a pole and tower parameter database, a foundation slope protection parameter database, and a fusion module; the system uses the most advanced and cheap three dimensional laser scanning technique to obtain a three dimensional data topographic map in the slope protection design correlation scope, and the topographic map can truly reflect the landform surface feature space information, is high in resolution, and high in precision; DEM elevation information of point cloud data can be utilized to form a contour with the precision above 0.5m altitude difference, thus satisfying contour precision requirements by the slope protection amount calculation, accurately realizing slope protection amount calculation, and reducing engineering investment and shortening a slope protection design period.

The invention relates to a synergistic method for preventing and controlling weeds of weeding vinegar and belongs to the field of a compound natural pesticide synergism technology and a usage method. The synergistic method for preventing and controlling weeds of the weeding vinegar comprises the following steps that 1, after the weeding vinegar is diluted with water, mineral oil accounting for 10-50% of the weight of the weeding vinegar is instantly added and is evenly stirred; 2, then a surfactant accounting for 0.5-5% of the weight of the weeding vinegar is added and is evenly stirred; 3, spraying is performed by using an electrostatic sprayer. The weeding vinegar has a promoting effect and is low in cost, accordingly does not easily form a large-tonnage consumption article and is used in common pollution-free food production. According to the method, the weeding vinegar, the mineral oil and the surfactant are packaged together in a bottling mode and are mixed in advance or poured in a separated mode according to the situation in use, accordingly the requirement for industrial applicability is met, the usage cost is greatly reduced, meanwhile a weeding effect is ensured, and the weeding vinegar is harmless while efficient weeding.

The invention discloses a toggle type mechanical edge covering press which comprises a base, stand columns, a cross beam, a sliding block, an edge covering die, overload protection devices, a transmission mechanism and a motor speed reduction device. The stand columns are fixed on two sides of the base; guide rails are installed on the inner side of the stand columns; the edge covering die is installed at the bottom of the sliding block; the cross beam is arranged at the tops of the stand columns; the upper ends of the overload protection devices are nested at the left end and the right end ofthe cross beam; the lower ends of the overload protection devices are connected with the transmission mechanism; and the transmission mechanism comprises a lead screw, a screw nut, a connecting blockand two sets of symmetrically arranged toggle mechanisms. The toggle type mechanical edge covering press has the advantages of compact structure, reinforcement effect, large working stroke, adjustable synchronous movement precision of the transmission mechanism and overload protection function in the working process.

The invention discloses a manual stamping and punching machine which is convenient for taking out workpieces. The sliding mechanism is slidingly connected with the frame, and the stamping mechanism is connected with the second transmission device through the first transmission device, and the second transmission device is symmetrically installed on the left and right sides of the frame. The stamping mechanism with thread transmission ability drives the stamping rod to punch the workpiece. It has compact structure, high transmission precision, stable work, and it has a force-increasing effect. As long as a small torque is given to the active part, the driven part will A large axial force can be obtained, which greatly increases the punching force of the punching and punching machine, which can meet the needs of use, and the processed workpiece can be taken out through the ejector mechanism, which is easy to operate and easy to use.

A numerical control turret punch press relates to the technical field of numerical control turret punch press automation. The numerical control turret punch press is compact in structure, high in reliability and convenient to use, conveniently detects the wear condition of a die based on a visual inspection technology under the condition of reserving the main body structure of the original turret punch press, can rapidly change the die after detection, and has high automation degree. When a cam disc rotates, a die changing device drives a clamping jaw to make linear reciprocating movement along a radial sliding hole through an arc-shaped cam groove, so that the die below a guide plate can be conveniently and efficiently grabbed or released. The work efficiency is high, and the stability is great. A die wear detection device and the die changing device are effectively arranged, the technical problem in the prior art that the wear condition of the die cannot be detected or judged is effectively solved, and after detection, the die out of the wear standard can be conveniently, efficiently and rapidly taken out and changed. As a whole, the numerical control turret punch press has high automation degree, great use effect and high work efficiency.

The invention discloses a combined-type hydraulic chuck for a tunnel drilling rig, wherein the combined-type hydraulic chuck comprises a slip, wherein an inner inclined surface mechanism is installed on the slip; an outer inclined mechanism is slidingly installed at the outer side of the inner inclined surface; a bearing is arranged between one end of the outer inclined surface mechanism and a blocking plate 1; and a spring is arranged between the other end of the outer inclined mechanism and a blocking plate 2. The combined-type hydraulic chuck for the tunnel drilling rig provided by the invention has the following characteristics of simple structure, convenience in using, high automation degree, small volume, light weight, great convenience in transportation, good clamping effect and low labor intensity.

The invention relates to a hybrid driven punch. A hydraulic oil cylinder and a mechanical connection rod mechanism are adopted and combined with each other. The hybrid driven punch comprises the hydraulic oil cylinder and a machine body. A piston rod is installed in the hydraulic oil cylinder. A slider is installed in the machine body and is connected with the piston rod through the connection rodmechanism. The innovation points lie in that the oil cylinder is adopted for driving two sets of symmetrically connected toggle rod mechanisms so as to achieve the purposes of secondary force increase and speed increase effects and adjustable working stroke and speed. The hybrid driven punch has the advantages that the slider is connected with the piston rod through a double toggle mechanism, thus the slider has the speed increase and force increase effects, thereby reaching the needed forge-press force in the mode that the hydraulic oil cylinder only needs to give small force to the double toggle mechanism, energy consumption is lowered greatly, energy is saved, and meanwhile the purpose of the adjustable stroke and speed of the slider can be achieved by controlling the stroke and speedof the hydraulic oil cylinder.

The invention discloses a novel quick-opening type valve which comprises a valve main body and a handle. One side of the upper end of the valve main body is connected with the handle through a handlesleeve base. A base with holes is installed at the bottom of the valve main body. The surface of the valve main body is symmetrically provided with an air inlet port and an air outlet port which are located on the upper side of the base with the holes. The air inlet port communicates with the air outlet port through a valve element cavity. A valve element body is arranged inside the valve elementcavity. The valve element body is of an O-shaped ring structure. The valve element body is connected with a guide rod through a fixed base. The upper end of the guide rod is connected with a guide shaft through a spring. The guide shaft is connected with an eccentric wheel through a guide shaft circular groove formed in the side surface of a handle base, the eccentric wheel is connected with a square rod through an eccentric shaft, the eccentric shaft is installed inside a bearing housing, the square rod penetrates through a reset groove to be connected with a handle core base of the handle, the handle is of a line-styled structure, ring bases are symmetrically installed on the surface of the upper outer side of the handle, and cleanliness is high.

A pole and tower foundation slope protection drawing automatic forming system comprises a pole and tower environment foundation database, a pole and tower parameter database, a foundation slope protection parameter database, and a fusion module; the system uses the most advanced and cheap three dimensional laser scanning technique to obtain a three dimensional data topographic map in the slope protection design correlation scope, and the topographic map can truly reflect the landform surface feature space information, is high in resolution, and high in precision; DEM elevation information of point cloud data can be utilized to form a contour with the precision above 0.5m altitude difference, thus satisfying contour precision requirements by the slope protection amount calculation, accurately realizing slope protection amount calculation, and reducing engineering investment and shortening a slope protection design period.

The present invention relates to a double-link overturning platform, which comprises an overturning platform top and an overturning system driving the overturning platform top, and wherein, the overturning system is composed of a platform top pitching mechanism and a platform top turning mechanism. The platform top pitching mechanism consists of a bench, two main motors, two decelerators, two couplings, two fixed seats, four fixed hinges, two small gears, two big gears, two big gear steady bearings, two lower link hinges, two links, two upper link hinges, a coordinating rod, a coordinating rodhinge, an overturning bench connecting seat, an overturning bench and two upper bench hinges. The platform top turning mechanism consists of a platform top rotating motor, a small platform top rotating gear, a large platform top rotating gear, a rotating platform top and a main shaft. The present invention utilizes the driving of the main motors and the platform top rotating motor to realize theoverturning movement of a workpiece on the rotating platform top, the structure is simple, the platform top pitching mechanism has a force-increasing effect, the self-locking protection can be realized at an ultimate overturning position, and the present invention can realize the overturning of large-tonnage workpieces.