47results about How to "High centering accuracy" patented technology

The utility model discloses a rotary self-centering chuck, and belongs to the field of machining equipment. The device comprises a fixed disc, a rotating disc, clamping jaws and a rotating driving mechanism, each clamping jaw comprises a connecting rod and a contact piece, one end of each connecting rod is hinged to the fixing disc, and the other end of each connecting rod is connected with the contact piece. The rotating disc is rotationally installed on the fixed disc, and a clamping jaw moving groove is formed in the side face of the rotating disc. The connecting rod penetrates through the clamping jaw moving groove, and the middle of the connecting rod is hinged to the wall face of the clamping jaw moving groove in a sliding mode. And the rotary driving mechanism controls the rotary disc to rotate on the fixed disc along the center of the rotary disc. According to the self-centering chuck, the structure of a traditional self-centering chuck is improved, the centering precision of the self-centering chuck is improved, the self-centering chuck can be suitable for different numbers of clamping jaws, the equipment structure is not complex, and the machining and maintenance cost is low.

The invention discloses a railway turnout flash welding machine which comprises a center shaft mechanism, a first clamping device, a second clamping device and a guiding device, upsetting oil cylinders of an upsetting device are installed on the outer side areas of the lower portions of a third box body and a fourth box body of the second clamping device respectively, and the two upsetting oil cylinders are connected with upsetting rod electrodes respectively; the other ends of the two upsetting rod electrodes are respectively connected with the corresponding box body I and the box body II to form a sliding pair; the lower portions of a first box body and a second box body of the first clamping device and the lower portions of a third box body and a fourth box body of the first clamping device are in a gradually-shrinking shape which gathers towards the corresponding jaws from top to bottom. The lower portions of the third box body and the fourth box body and the lower portion of the first box body and the lower portion of the second box body are in a wedge shape gathering towards the extending direction of the rail. The five-axis structure is adopted, so that the bending rigidity and strength are remarkably improved, steel rails which are gradually close to each other on the two sides of the turnout can be prevented from interfering with each other due to the gathering and gradual shrinking of the box body and the wedge-shaped structure, and the device is very suitable for operation in narrow spaces such as turnout areas.

The invention discloses a supporting structure for reducing the degree of freedom of an electromechanical transmission output shaft and an output gear, which belongs to the technical field of mechanical design and comprises a cylindrical pin, the output shaft, a flange plate, the output gear and a bearing. The flange plate is mounted on the box body; the flange plate is supported on the output gear through a bearing; one end of the output shaft is coaxially sleeved in an axial blind hole A in the output gear; the output gear and the output shaft are coaxially connected through a cylindrical pin; one end of the cylindrical pin is in transition fit with an axial blind hole B in the output gear, and the other end of the cylindrical pin is in transition fit with an axial blind hole C in the output shaft. According to the invention, the cylindrical pin is utilized to restrain the redundant degrees of freedom of the output gear and the output shaft in the axial direction and the radial direction, and the coaxiality between the output shaft and the output gear is improved, so that the assembly error is reduced, the dynamic load is reduced, and the overall performance and reliability of an electromechanical transmission system are improved.

The utility model relates to the technical field of automation, in particular to a clamping device and clamping equipment, which comprise a fixed seat and a clamping jaw mechanism, a rotating shaft is arranged on the fixed seat and penetrates through the fixed seat; the two clamping jaw mechanisms are arranged on the two sides of the fixing base in the axial direction of the rotating shaft correspondingly. The clamping jaw mechanism comprises a first clamping jaw, a second clamping jaw, a first transmission part, a second transmission part and a third transmission part; the first clamping jaw and the second clamping jaw are oppositely arranged on the two radial sides of the rotating shaft and are both slidably connected with the fixing base, and the sliding directions of the first clamping jaw and the second clamping jaw face the rotating shaft. The first transmission part is rotationally connected with the rotating shaft and comprises a first end and a second end; one end of the second transmission part is rotationally connected with the first clamping jaw, and the other end is rotationally connected with the first end; one end of the third transmission part is rotationally connected with the second clamping jaw, and the other end is rotationally connected with the second end; the first clamping jaw moves and drives the second clamping jaw to be relatively close to or away from the rotating shaft. The centering device is high in centering precision and does not damage materials.

The embodiment of the utility model discloses a direct-connection type range extender and a hybrid electric vehicle, and the direct-connection type range extender comprises an engine which comprises a crankshaft; the generator comprises a generator housing, which is provided with a centering shaft; the rotor bracket is in transmission connection with the crankshaft and sleeves the periphery of the centering shaft; one of the crankshaft and the centering shaft is provided with a positioning hole, and the other one is provided with a positioning part; and the positioning hole is matched with the positioning part in shape, so that the positioning part is embedded in the positioning hole. According to the utility model, the centering degree among the crankshaft, the generator shell and the rotor bracket is improved in the installation process, the precision requirement of installation equipment is reduced, and the installation difficulty of the generator on an engine is reduced.

The utility model relates to the technical field of assembly or welding process equipment, in particular to a roller vertical clamping and positioning tool for assembly and welding, which comprises a pit arranged on an operation site, a centering positioner arranged at the bottom of the pit and a centering clamp arranged on the periphery of the opening of the pit. The centering positioner comprises a centering seat ring and a conical positioning hole formed in the upper end face of the centering seat ring. The centering clamping device comprises a pair of synchronous clamping devices and a pair of V-shaped clamping blocks, wherein the pair of synchronous clamping devices is fixed to the periphery of the pit opening portion of the pit and arranged on the two sides of the periphery of the pit opening portion respectively, and the pair of V-shaped clamping blocks is correspondingly arranged at the front ends of the pair of synchronous clamping devices and used for clamping the outer circle of a roller. According to the utility model, vertical hoisting during roller assembling and welding is facilitated, and the convenience and the production efficiency of roller assembling operation or roller welding operation are improved.

This invention discloses a cold forging device and method for high-pressure oil pipe sealing cones based on a vertical hydraulic press. The cold forging fixture includes an upper die and a lower die. The upper die is connected to the head mold by a connector, allowing for adaptation to different products by changing the head mold of different specifications, thus offering strong versatility. The lower die is assembled layer by layer from bottom to top, consisting of a pad, support, body, clamping block, pressure ring, and clamping nut. The parts are connected by standardized methods such as cylindrical surface fit, conical surface fit, and threaded connection. Any worn or damaged part can be disassembled and replaced individually without replacing the entire set of molds, reducing maintenance costs and downtime. The forging method using this fixture effectively improves the forging quality and dimensional accuracy of high-pressure oil pipe sealing cones, significantly reducing the overall manufacturing cost. It can be widely used in the forging and forming of high-pressure oil pipe sealing cones for high-power diesel engines.

The utility model discloses a centering guide mechanism. The centering guide mechanism comprises an auxiliary supporting assembly and a clamping centering assembly which are sequentially arranged in the bamboo feeding direction. The clamping and centering assembly comprises a clamping assembly, a guiding assembly and a driving assembly. The clamping assembly and the guiding assembly are sequentially arranged in the bamboo feeding direction, and the clamping assembly and the guiding assembly are in transmission connection with the driving assembly. According to the bamboo splitting machine, the centering precision of bamboos can be improved, and it is guaranteed that the sizes of bamboo chips are uniform after the bamboos are split.

The utility model provides a conical head processing device convenient to position relates to mechanical equipment technical field, including top support, install upper die on top support, be equipped with lower die under the upper die, the lower die is installed on the bottom support, the utility model discloses a positioning mechanism and the support mechanism constitute the pure mechanical linkage mechanism that designs, will simple manual dial -in input precision is converted into the synchronous straight line of multiple positioning points and pushes the action, has realized to the conical head steel sheet quick, accurate and reliable centering positioning, has greatly promoted the precision and efficiency of subsequent punch forming.

The utility model relates to rail flaw detection technical field, and disclose a new type railway double rail flaw detection car flaw dynamic and static calibration test block. The new type railway double rail flaw detection car flaw dynamic and static calibration test block, including base plate and rail, the rail includes rail head, rail waist and rail bottom, the top fixedly connected with the rail of base plate is before and after symmetry distribution, the surface of rail head all is inlayed and set with wear -resisting alloy layer, the surface of rail head all is equipped with transverse slot type defect, this device has the advantages such as simplifying calibration procedure, improving calibration stability, reducing economy and site restriction, perfecting detection function, reducing comprehensive cost and improving centring accuracy, guaranteeing the accuracy and efficiency of flaw detection car detection, adapting to the development demand of railway flaw detection technology, solve the calibration operation of the existing railway double rail flaw detection car flaw dynamic and static calibration technology complicated, poor stability, is restricted by economy and site, test block function is insufficient, detects the cost is high and the problem of low centring calibration accuracy.

This invention relates to the field of vertical milling and turning technology, and discloses a vertical milling and turning composite machining center, including a machining table, a support frame, a vertical cantilever, a drive motor, and a drive shaft. A composite machining mechanism for switching machining types is mounted on the side of the vertical cantilever; a switching mechanism for changing the workpiece's motion state according to the machining type is provided below the composite machining mechanism; a spraying mechanism for changing the coolant's application according to the machining type is provided on the upper surface of the machining table; a clamping mechanism for fixing a ring-shaped workpiece is provided at the top of the switching mechanism; the composite machining mechanism includes a sliding frame plate, with two double-toothed plates slidably connected inside the sliding frame plate. This invention utilizes the forward and reverse directions of the vertical cantilever's lifting stroke to correspond to different machining actions, improving the continuity of actions and machining efficiency, and ensuring the positional stability and synchronization accuracy of the milling cutter and drill bit near the workpiece.

This invention relates to the field of positioning technology for thin-walled workpieces, and discloses a positioning device for preventing offset of thin-walled workpieces based on CNC machine tools. It aims to solve the technical problems of easy deformation during positioning of thin-walled workpieces and poor adaptability of traditional clamping blocks. The device includes a CNC machine tool body, a rotating chuck, an adjustment drive assembly, a push rod assembly, and a tensioning positioning assembly. A frustum-shaped push block converts rotational motion into linear motion via a screw and nut mechanism. This, in conjunction with a limiting assembly, drives the push rod assembly to synchronously and uniformly extend and retract radially, causing a spring steel sheet with a pre-positioned section to achieve curvature self-adaptation. The pre-positioned section is a sliding compensation arc surface section, adapting to thin-walled pipes of different diameters while maintaining surface contact. The device has two sets of staggered tensioning positioning rings, forming a full-circumferential, gapless support for the inner wall of the pipe. This device avoids stress concentration problems caused by line contact, effectively preventing deformation of thin-walled pipes, balancing positioning firmness and deformation prevention requirements, and significantly improving the processing qualification rate and production efficiency of thin-walled pipes.

The utility model discloses a conveyor centering mechanism, first long clamping arm is fixed on first sliding block, second long clamping arm is fixed on second sliding block, first long clamping arm includes fixed base, clamping plate and pressure sensor, fixed base and first sliding block fixed connection, clamping plate and fixed base are connected through spring, pressure sensor contact projects on fixed base, pressure sensor and PLC controller communication connection, PLC controller control electric cylinder servo motor, first long clamping arm and second long clamping arm are symmetrical, and the left and right sides of base are equipped with guide rail, and first sliding block or second sliding block is driven along guide rail and moves by electric cylinder, and transmission guide rod includes first guide rod, second guide rod and third guide rod, the utility model discloses adopting the sliding centering structure of clamping arm cooperation transmission guide rod, and the two sides clamping arm clamps tightly by servo motor control, after centering is completed, the pressure sensor is triggered by compression spring, makes servo motor reverse, and clamping arm opens and resets, and the structure is simple, and the centering precision is high, can stable repeat work.

The tail end driving clamp comprises a flange, a transmission rod, a transmission block, a driving ring and a plurality of springs, the two ends of the transmission rod are fixedly connected with the flange and the transmission block respectively, the driving ring is fixedly connected with the transmission block, the driving ring and the flange are coaxially arranged, an opening is formed in the driving ring, and the springs are arranged in the opening. A first through hole and a first threaded hole are vertically formed in the two sides of the opening respectively, the locking screw penetrates through the first through hole to be in threaded connection with the first threaded hole, the driving ring is used for tightly holding the tail end of the shaft workpiece, the springs are arranged in the circumferential direction of the driving ring at equal intervals, and the two ends of each spring are connected with the flange and the driving ring respectively. The clamp is used in combination with an existing high-precision center and an existing center frame, can replace a chuck, fix the tail end of a shaft workpiece and drive the shaft workpiece to do rotary motion, can achieve high-precision and high-efficiency clamping of the shaft workpiece, can be widely applied to a grinding machine with a headstock provided with the center, and enables the average grinding machining efficiency of the shaft workpiece to be improved by about 10%.

The present invention discloses a clamp and a five-axis machining machine, which relate to the technical field of numerical control machining equipment. The clamp has a first clamping part and a second clamping part. The first clamping part is used to abut against one side of a blade, and the second clamping part is pressed against the other side of the blade under the locking action of a first fastener, thereby clamping the blade. When the clamping position of the blade needs to be adjusted, the first fastener is first loosened, and the first adjusting member is rotated to drive the pusher to slide on the guide slope, thereby driving the support seat to slide toward the blade, and the first clamping part and the blade are abutted and transmitted to adjust the clamping position of the blade between the first clamping part and the second clamping part, so that the center of the blade can be close to the central axis of the turntable. Therefore, the clamp of the present invention is conducive to improving the centering efficiency and centering accuracy of the blade.

The invention belongs to the technical field of workpiece storage and feeding equipment, and particularly relates to a material sheet feeding method and system. A material rack is transferred to a feeding machine from a material warehouse through material transferring equipment; the material frame comprises a material table and a loading mechanism, the material table is used for stacking round material sheets, the round material sheets are driven by the loading mechanism to move towards the center of the material table to achieve centering, and the edges of the round material sheets are limited by the loading mechanism to achieve positioning; according to the feeding machine, the material frame is fixed to the lifting position through the positioning material table, the material frame is driven to move from the lifting position to the round material pieces on the top layer to be transferred to the feeding position, and automation, modularization and standardization of the round material pieces in the warehousing storage process, the discharging transfer process and the feeding process are achieved; and the tedious process that in the prior art, the circular material pieces need to be transferred for the second time is avoided, and therefore the feeding procedure is simpler.

The invention relates to the field of liquid or fluid sampling devices, in particular to an automatic loading and unloading device for a temperature measurement sampling probe and a using method thereof. The automatic loading and unloading device for the temperature measurement sampling probe comprises a robot (1) and a probe (2), a gripper (12) is arranged at the outer end of an operating arm (11) of the robot (1), the gripper (12) holds the probe (2), and the automatic loading and unloading device is characterized by further comprising a bottom plate (3), a guide cone (4) and a clamping device (5), and the bottom plate (3) is vertically arranged; the guide cone (4) is in a horn shape, the small round end of the guide cone (4) serves as the bottom to be fixed to the bottom plate (3), and the connector (13) is arranged above the top of the guide cone (4). The clamping devices (5) are movably buckled on the two sides of the bottom plate (3) through the inner ends and arranged below the bottoms of the guide cones (4), the spring shifting pieces (51) and the anti-skid plates (52) are sequentially embedded in the middles of the clamping devices (5), and anti-skid teeth (521) are arranged on the side faces of the anti-skid plates (52). The application method of the automatic loading and unloading device for the temperature measurement sampling probe comprises the steps of mounting and dismounting. The device is high in automation degree and reliable in assembly and disassembly.

The application discloses a motor rotor maintenance tool and belongs to the technical field of motor maintenance. The tool comprises a non-maintenance end tool and a maintenance end tool. The non-maintenance end tool fixes the transition disc to the motor end cover through the tooth bar, the non-maintenance end shaft head is connected to the slewing bearing inner ring through the first shaft head flange, and the slewing bearing outer ring is fixed to the transition disc, so that the axial positioning and the free rotation are decoupled. The maintenance end tool is fixed to the motor base end face through the tool base, the rotor shaft is supported by the adjustable roller, the limiting plate with the ball is arranged to cooperate with the limiting sleeve, and the axial movement of the rotor is limited. The tool takes the motor structure as the positioning reference, is favorable for improving the tool installation precision, reducing the radial space occupation, facilitating the disassembly and assembly, is suitable for narrow working conditions such as the wind power tower drum, and can reserve the driving module and the turning module installation interface to realize the on-site rotary machining.

The present invention discloses a servo sheet metal centering mechanism, comprising: a bidirectional centering unit, a unidirectional centering unit, a centering platform base, and a panel, wherein the panel is arranged on the top surface of the centering platform base, and a plurality of unidirectional centering units and bidirectional centering units are arranged below the panel. Through the above manner, the servo sheet metal centering mechanism of the present invention realizes that a centering platform can meet the centering of two types of workpieces, a single large sheet metal and two small sheets, through a liftable bidirectional flapping structure, with diverse functions, high centering accuracy, and high efficiency.

The application discloses a barrel type fireproof coating automatic capping mechanism and relates to the technical field of fireproof coating production. The barrel type fireproof coating automatic capping mechanism comprises a workbench, a barrel roller way, a feeding roller, an adjustable support, a fixing base, a jacking mechanism, a positioning and capping mechanism and a driving mechanism. The positioning and capping mechanism is arranged below the fixing base in a liftable mode and is provided with a positioning station and a rotating capping station. When the positioning station is used, the positioning and capping mechanism is lowered to be attached to the barrel cap at the barrel opening of the coating barrel, so that the coating barrel is coaxially positioned with the positioning and capping mechanism. When the rotating capping station is used, the positioning and capping mechanism is rotated, and the capping sheet on the barrel cap is pressed against the barrel opening of the coating barrel. The barrel, the barrel cap and the capping sheet are coaxially positioned through the positioning and capping mechanism. The capping sheet can be extruded from top to bottom and then be rotated and extruded. The capping sheet can be uniformly pressed against the barrel opening, the attachment compactness is improved, and the capping effect is improved.

The invention discloses a turnout welding machine with a postweld heat treatment function, which comprises a central shaft mechanism, a first clamping device, a second clamping device, a guide device and an induction heat treatment device arranged between the first clamping device and the second clamping device, the lower portions of a first box body and a second box body of the first clamping device and the lower portions of a third box body and a fourth box body of the first clamping device are in a gradually-shrinking shape which gathers towards the corresponding jaws from top to bottom. The lower portions of the third box body and the fourth box body and the lower portion of the first box body and the lower portion of the second box body are in a wedge shape gathering towards the extending direction of the rail. The five-axis structure is adopted, so that the bending rigidity and strength are remarkably improved, steel rails which are gradually close to each other on the two sides of the turnout can be prevented from interfering with each other due to the gathering and gradual shrinking of the box body and the wedge-shaped structure, the device is very suitable for operation in narrow and small spaces such as turnout areas, and the two working procedures of welding and postweld heat treatment can be completed under one-time clamping.

The invention discloses a positioning and clamping device for heat treatment of an aerospace high-strength structural part, relates to the field of aerospace component heat treatment tools, and solves the problems that an existing device is poor in adaptability and insufficient in clamping and fitting degree. The device comprises a positioning base table, side jacking limiting pieces and a clamping driving piece, the positioning base table is a basic support, and the side jacking limiting pieces are distributed in a bilateral symmetry mode and can be freely combined up and down to adapt to workpieces with different heights. The side jacking limiting piece comprises a sliding base, a jacking rod, a jacking head and an elastic jacking piece, the jacking head achieves angle self-adaption through a universal ball joint and is attached to the side face of a workpiece, and the elastic jacking piece provides continuous jacking force. The clamping driving piece drives the sliding seats on the two sides to move synchronously through the double-end lead screw, and stable movement and accurate positioning are guaranteed in cooperation with the guide assembly. The device is flexible in clamping and high in universality, deformation of workpieces during heat treatment can be avoided, and the clamping efficiency and the machining precision are improved.

This utility model discloses a sliding guide centering device for a high-speed wire rod finishing mill, belonging to the field of high-speed wire rod production technology. It is installed on the roll box panel of the guide seat and includes a first slide rail, a second slide rail, a third slide rail, a first centering clamping plate, a second centering clamping plate, and a third centering clamping plate. The first centering clamping plate is slidably connected to the first slide rail via a first slider, the second centering clamping plate is slidably connected to the second slide rail via a second slider, and the third centering clamping plate is slidably connected to the third slide rail via a third slider. The first centering clamping plate includes a first square plate and a first centering portion in the shape of an isosceles trapezoid. The second centering clamping plate includes a second square plate and two second centering portions in the shape of isosceles triangles. The third centering clamping plate includes a third triangular plate and a third centering portion in the shape of an isosceles trapezoid. All three centering clamping plates can be moved left and right and their positions can be finely adjusted forward and backward. This utility model solves the problem of unstable centering of the sliding guide in existing high-speed wire rod finishing mills.

The utility model provides a kind of tooling and assembly equipment, tooling is used for the centering of bushing, it includes first body and positioning pin, first body is equipped with lap joint portion near the side edge of bushing, lap joint portion is formed by the inward recess of one end of first body;When assembling top plate, lap joint portion is overlapped with the edge of bushing, positioning pin is fixedly connected first body and chamber cover, then top plate is fixed and set in the upper of bushing.This application is limited to bushing by first body, then fixedly connects first body and chamber cover by positioning pin, to further fix first body, chamber cover and bushing, to avoid bushing to move on chamber cover, so that the position of bushing is stable and unchangeable when assembling top plate, to make the center of chamber cover, bushing and top plate consistent, improve the centering accuracy of bushing and chamber cover, top plate, to improve the gap uniformity of bushing and top plate, to improve the uniformity of purge gas, to improve production quality, and improve production efficiency and service life.

The utility model relates to a Charpy pendulum impact sample centering device which comprises a positioning sliding block, an adjustable limiting screw rod and a driving air cylinder, wherein the positioning sliding block, the adjustable limiting screw rod and the driving air cylinder are arranged beside a supporting seat in a Charpy pendulum impact test device; one end of the positioning sliding block is connected with a piston rod of the driving air cylinder through the adjustable limiting screw rod. The Charpy pendulum impact sample centering device provided by the utility model can quickly position the impact sample, is high in centering precision, is particularly suitable for a low-temperature Charpy pendulum impact test, can avoid centering and positioning a clamp due to manual operation, and solves the technical problem that the error fluctuation of an impact value is relatively large due to long centering time and low centering precision in conventional operation.

The utility model relates to an online centering detection device for a submersed nozzle, and belongs to the technical field of steelmaking continuous casting tundish pouring production equipment. According to the technical scheme, the centering device comprises a front-back centering rod (8), a left-right centering rod (12), positioning rods (9), a supporting rod (10) and a centering frame (11), the positioning rods (9) are connected to the four corners of the centering frame (11), and the positioning rods (9) are inserted into an upper opening of a crystallizer (7); the supporting rod (10) is connected with the centering frame (11) and is horizontally lapped on the upper edge of an upper opening of the crystallizer (7); the front-back centering rod (8) and the left-right centering rod (12) are perpendicular to the centering frame (11) and arranged in the center of the adjacent edge portions of the centering frame (11). The submerged nozzle centering device is simple and reasonable in structure and safe and reliable to use, the submerged nozzle centering operation is simple, on-line rapid centering of the submerged nozzle can be achieved, the centering precision of the submerged nozzle is improved, and the centering time is saved.

This utility model relates to the technical field of pipe processing equipment, specifically a pipe beveling machine. The cylindrical body is provided with multiple clamping components on its periphery. Each clamping component includes a fixed seat, a cover, and a clamping block. The fixed seats are fixed to the outer wall of the cylindrical body, and the cover is fixed to the outer end of the cylindrical body. The cylindrical body has an internal cavity, and multiple springs are symmetrically arranged vertically within the cavity. The clamping block is inserted into the cavity and connected to the front end of each spring. The rear end of the clamping block has a horizontal bar that penetrates the cover, and the horizontal bar is slidably connected to the cover. The rear end of the horizontal bar has an arc surface. In terms of adaptive clamping, the dual mechanism of spring preload and hydraulic drive allows the equipment to automatically adapt to pipes of different diameters within a certain range, eliminating the need for manual clamp adjustment and greatly improving the equipment's versatility.

The invention discloses a chuck (1) for a machining device, comprising: a rotatable base (2); the driving unit (3) is mounted on the base (2); the clamping jaw unit (4) is movably mounted on the base (2) and is suitable for grabbing a machined workpiece; and a centering transmission unit (5) comprising: a centering portion configured to be driven by the drive unit (3) to rotate about a rotation axis (L) of the base (2); and the connecting rod part is respectively hinged with the centering part and the clamping claw unit (4) and is used for transmitting the rotary motion of the centering part to the clamping claw unit (4) to carry out grabbing motion. According to some exemplary embodiments, the centering precision of the chuck can be improved, meanwhile, the clamping force can be easily adjusted according to the size of a workpiece, workpiece deformation is avoided, and machining quality can be improved. The invention further discloses a corresponding machining device.

The utility model relates to the field of motor production, in particular to a die-casting die for assembling a rotor bearing, which comprises a base, a polytetrafluoroethylene gasket and a polytetrafluoroethylene positioning ring, a bearing positioning groove is formed in one end face of the base, the polytetrafluoroethylene gasket is arranged in the bearing positioning groove, and a rotor shaft positioning hole is formed in the bearing positioning groove along the axis; one end face of the base is provided with an arc-shaped fence surrounding the bearing positioning groove, and the polytetrafluoroethylene positioning ring is arranged on the inner edge of the top of the arc-shaped fence. The die-casting die for assembling the rotor and the bearing is high in centering precision, good in supporting and positioning effect, shock-absorbing and wear-resistant, and beneficial to improving the assembling quality of the rotor and the bearing and improving the working performance of a motor.

The present invention discloses a single-power four-jaw linkage grasping and clamping manipulator suitable for centering and clamping of rectangular parts, comprising: a frame, an active jaw unit, a driven jaw unit and a dial ring transmission unit. The active jaw unit comprises: a forward and reverse wire floating screw, a first slider, and a second slider. Compared with the prior art, the present invention utilizes a power to drive the forward and reverse wire floating screw to rotate, combined with a relatively simple structure of a dial ring transmission unit as a transmission component, and finally realizes the extension and retraction of four jaws, and the overall structure is simple and reliable. Two pairs of jaws clamp the workpiece to be clamped from two different directions successively, have a centering function and high centering accuracy, and the moving distances of different groups of jaws can be the same or different. It is not only suitable for square and circular workpieces, but also for rectangular workpieces, and has a wider range of applications.