CN112547847B - Formula gyro wheel actuating mechanism is driven down to high accuracy - Google Patents

Formula gyro wheel actuating mechanism is driven down to high accuracy Download PDF

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Publication number
CN112547847B
CN112547847B CN202011275418.5A CN202011275418A CN112547847B CN 112547847 B CN112547847 B CN 112547847B CN 202011275418 A CN202011275418 A CN 202011275418A CN 112547847 B CN112547847 B CN 112547847B
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China
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roller
shaft
matched
precision
hole
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CN112547847A (en
Inventor
庄树明
于明
陈景光
刘立
陈城
车立志
牛加飞
于洪星
王大雷
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Sinotest Equipment Co ltd
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Sinotest Equipment Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D3/00—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts
    • B21D3/02—Straightening or restoring form of metal rods, metal tubes, metal profiles, or specific articles made therefrom, whether or not in combination with sheet metal parts by rollers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
    • G01B5/06—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness for measuring thickness

Abstract

The invention relates to a high-precision lower-driving type roller driving mechanism, and belongs to the field of shaft rod correction. The high-precision roller lower driving mechanism comprises a driven end of the high-precision roller lower driving mechanism and a driving end of the high-precision roller lower driving mechanism, wherein the lower surfaces of the driven end of the high-precision roller lower driving mechanism and the driving end of the high-precision roller lower driving mechanism are planes, and the lower surfaces of the driven end of the high-precision roller lower driving mechanism and the driving end of the high-precision roller lower driving mechanism are matched with the upper surface of a workbench and can slide on the surface of the workbench. The invention can realize the rotary driving of various rod type parts such as optical shafts, lead screws and the like with equal diameter, variable diameter, no central hole, different lengths and different diameters. Compared with the prior roller device, the device solves a series of technical defects of low precision, easy slipping, poor adaptability and the like when the roller is taken as a reference to carry out rotation measurement. The invention has the advantages of high precision of the rotating reference, wide applicable workpieces, flexible and convenient operation, convenient adjustment, breaking through the requirement of high precision straightness of shafts taking the excircle as the reference, simple assembly, compact structure, convenient production and the like.

Description

Formula gyro wheel actuating mechanism is driven down to high accuracy
Technical Field
The invention belongs to the field of shaft rod correction, is mainly used for automatic straightening equipment and detection equipment of shaft parts, and is widely applied to straightening driving of shaft rod parts such as screw rods, hydraulic engineering cylinder piston rods and cylinder barrels in the petroleum industry, roller shafts of textile machinery equipment, guide shafts and guide rollers of printing machinery, and ball screws required by various equipment.
Background
For a workpiece without a central hole, a support datum and driving power need to be provided for the workpiece when the workpiece is straightened or measured. For a straightening machine, a driving device of the straightening machine is a device for driving the workpiece to rotate and measure in the straightening process, and is also a mechanical reference for the rotation and measurement of the workpiece. The driving device drives the workpiece to rotate for a circle, the displacement sensor and the angle sensor feed back the jumping value of the workpiece and the rotating angle value of the workpiece in real time, the control card samples at a certain sampling frequency, and the angle value and the jumping value at the same moment are corresponded to establish a coordinate system of the jumping amount-angle of the measured section. Because the workpiece to be measured has initial bending, a certain gap must be left between the workpiece and the support in order to prevent the workpiece and the support from interfering. The driving device cannot bear the acting force of the pressure head when the pressure head pushes the workpiece to move towards the support to eliminate the gap, so that the driving device is required to have the function of separating from the workpiece during straightening.
The conventional driving device under the roller of the straightening machine is fixed in wheel base and height, when the diameter of a straightened workpiece changes, the roller corresponding to the straightened workpiece needs to be replaced, and the rotating precision is reduced due to repeated assembly. When the diameter of the workpiece changes greatly, the workpiece is of multiple types and is small in batch, frequent replacement of the roller can take up a large amount of time, so that the working strength of operators is aggravated, and the production efficiency is greatly reduced.
The straightness requirements of a roller shaft, a ball screw and a guide shaft of a printing machine are increasingly improved, the straightness is required to be less than or equal to 0.02mm, due to machining and assembling errors of a traditional roller lower driving device, the radial runout of a roller is 0.01-0.05mm, and the rotation repeated measurement error of a workpiece is approximately 0.01-0.1 mm, so that the traditional roller lower driving device cannot meet the requirement of high-precision straightness on shaft type workpieces.
In summary, those skilled in the art need to solve the above-mentioned problems, how to provide a roller driving device with high precision, wide adaptability and convenient adjustment.
Disclosure of Invention
The invention provides a high-precision downward-driving roller driving mechanism, which is used for meeting the requirements of straightening various high-precision straight-line shafts.
The technical scheme adopted by the invention is as follows: comprises a driven end of a high-precision roller lower driving mechanism and a driving end of the high-precision roller lower driving mechanism, wherein the lower surfaces of the driven end of the high-precision roller lower driving mechanism and the driving end of the high-precision roller lower driving mechanism are planes, the center of the upper surface of the workbench is provided with a central guide rail, the section of the central guide rail is in a single dovetail shape, the driven end of the high-precision roller lower driving mechanism and the fixed bracket of the driving end of the high-precision roller lower driving mechanism are provided with a single dovetail groove structure, which is matched with the dovetail inclined plane of the central guide rail and can adjust the installation position of the dovetail inclined plane on the central guide rail, the high-precision roller lower driving mechanism driving end and the high-precision roller lower driving mechanism driven end are respectively positioned at two ends of a circular workpiece, and the excircle surfaces of the two ends of the circular workpiece are tangent to the excircle of a high-precision crossed roller bearing in the movable part of the roller driving mechanism; one end face of a workpiece is tangent to the surface of an outer ring of a bearing on a shaft end positioning mechanism on the driving end of a high-precision roller lower driving mechanism, the other end face of the workpiece is tangent to the surface of an excircle of a cam guider on the driven end of the high-precision roller lower driving mechanism, a swing pressing wheel mechanism in the high-precision roller lower driving mechanism and the excircle of the cam guider of the swing pressing wheel mechanism press the outer surfaces of two ends of the workpiece above the workpiece to increase the friction force between the workpiece and the roller mechanism, a motor in the driving end of the high-precision roller lower driving mechanism drives the outer ring of a high-precision crossed roller bearing to rotate through a belt wheel, a belt wheel and a tooth form belt, the outer ring of the high-precision crossed roller bearing drives the workpiece to rotate through the friction force, and the outer ring of the high-precision crossed roller lower driving mechanism in the driven end of the high-precision roller lower driving mechanism drives the outer ring of the high-precision crossed roller bearing to rotate under the action of the friction force, the outer ring of the high-precision crossed roller bearing drives a photoelectric encoder in a photoelectric encoder part to rotate through a toothed belt wheel and a toothed belt transmission mechanism which are connected with the outer ring of the high-precision crossed roller bearing, so that the photoelectric encoder records the rotation angle value of a workpiece; a roller mechanism measuring part in the high-precision downward-driving roller driving mechanism and a measuring tappet rod arranged on the roller mechanism measuring part are in contact with the surfaces of two ends of a workpiece, so that the radial runout values of the two ends of the workpiece are detected.
The driving end of the high-precision roller lower driving mechanism comprises: the roller mechanism measuring part, the roller mechanism movable part, the swing pressing wheel mechanism, the shaft end positioning mechanism, the speed reducing motor part and the roller mechanism fixed part are arranged, wherein the roller mechanism fixed part is provided with a single dovetail groove structure and used for locking with a dovetail guide rail on a workbench, the roller mechanism fixed part is matched and connected with a slide block on a linear guide rail component in the roller mechanism movable part through screws, the speed reducing motor part is provided with a fixed plate which is matched and connected with a fixed bracket on the roller mechanism fixed part, the speed reducing motor rotates to drive a high-precision roller on the roller mechanism movable part to rotate, the fixed plate is provided with a long hole, the mounting position of the speed reducing motor part on the fixed bracket can be adjusted, the end surface of a positioning cylinder bracket on the shaft end positioning mechanism is matched with the fixed bracket and is connected by screws, the pressing wheel mechanism is provided with a corner cylinder fixing bracket, the end face of the measuring tappet is matched with a fixed support and is connected with the fixed support through a screw, a linear guide rail assembly is arranged on a movable part of the roller mechanism, a guide rail on the linear guide rail assembly is matched with the side face of a fixed plate of the roller mechanism and is connected with the side face of the fixed support through a screw, a sliding block on the linear guide rail assembly is matched and connected with the fixed support, air cylinders are arranged on two sides of the fixed part of the roller mechanism and can push the movable part of the roller mechanism to vertically lift, a connecting frame is arranged on a measuring part of the roller mechanism and is connected with an air cylinder adjusting connecting block in the movable part of the roller mechanism through a screw, and a measuring tappet is arranged on the measuring part of the roller mechanism and is matched with excircles at two ends of a workpiece in real time under the action of an extension spring to monitor the radial runout of the two ends of the workpiece.
The roller mechanism measuring part comprises a locking screw, a protective plate, a bearing end cover, an angular contact ball bearing, a rotating shaft, a sensor fixing block, an extension spring, a sliding plate, a lever, a jackscrew, a tappet frame, a measuring tappet, a measuring support, a connecting frame, an upper spring pull rod, a lower spring pull rod and a shaft sleeve, wherein the roller mechanism measuring part is connected with the fixing support in the roller mechanism fixing part through the connecting frame; the protection plate is an L-shaped thin-wall plate, the surface of the protection plate is provided with a counter bore, and a screw is matched with the counter bore and is arranged on two sides of the measuring bracket to protect the sensor; the bearing end cover is square, an annular boss is arranged on the end face of the bearing end cover, four unthreaded holes are uniformly distributed on the periphery of the square, the bearing end cover penetrates through the four unthreaded holes through screws to be tightly connected with threaded holes in the side face of the measuring support, and the annular boss on the end face of the bearing end cover is matched with an outer ring of the angular contact ball bearing to adjust the axial clearance of the angular contact ball bearing; the inner sides of the bearing outer rings of the angular contact ball bearings are provided with oblique angles, the oblique angles are used in pairs and are installed face to face, the angular contact ball bearings can bear axial and radial loads, the outer circle of the bearing outer ring is matched with a unthreaded hole on a measuring support, the end face of the bearing outer ring without the oblique angles is matched with the end face of an annular boss of a bearing end cover, the bearing outer ring is free from the oblique angle end face, the shaft diameters of the bearing inner rings of the two angular contact ball bearings are matched with the outer circle of the shaft diameter of a rotating shaft, and the end face of one bearing inner ring is respectively matched with the end face of a shaft sleeve and the end face of a circular bead of the rotating shaft; the end surface of the other bearing inner ring is respectively matched with the end surface of the shaft sleeve and the side surface of the spring retainer ring, the rotating shaft is in the shape of a circular shoulder shaft with a circular retaining edge, and a circular groove is arranged at the shaft diameter position far away from the circular retaining edge and used for installing the spring retainer ring; the sensor is in a stepped cylinder shape and comprises a fixed stepped cylinder and a sliding measuring rod, the sliding measuring rod is a cylindrical rod and can freely slide in the center of the stepped cylinder, the head of the measuring rod is provided with a spherical measuring head, the measuring head is detachable, the sensor measures the displacement of the measuring head in a differential transformation mode, the measuring precision is less than or equal to 0.001mm, the side surface of the sensor fixing block is in an L shape, a short L-shaped part is provided with an optical hole, a long L-shaped part is provided with an optical hole, the middle section of the optical hole is provided with a rectangular opening, the optical hole is divided into two semicircles by the rectangular opening, the end surface of the long L-shaped part of the sensor fixing block is provided with an optical hole, the optical hole is communicated with one side surface of the rectangular opening, the other side surface of the square opening is provided with a threaded blind hole, the threaded hole is coaxial with the optical hole of the end surface of the long L-shaped part, and a locking screw penetrates through the optical hole of the end surface of the L-shaped part, the screw thread part on the shaft lever of the locking screw is matched and connected with the screw thread blind hole on the sensor fixing block, the shape of the extension spring is a cylindrical spiral spring with an extension function, hooks are arranged at two ends of the extension spring, the hooks at the two ends are respectively connected in the unthreaded holes of the upper spring pull rod and the lower spring pull rod and are used for applying spring force to one end of the lever, so that the lever can rotate around the axis of the rotating shaft; the measuring support is rectangular, a rectangular groove and a unthreaded hole are formed in the upper end of the measuring support, threaded holes are formed in the periphery of the measuring support, an angular contact ball bearing is installed in the unthreaded hole of the measuring support, an inner ring of the angular contact ball bearing is matched with the excircle of two ends of a rotating shaft, the diameter of a middle shaft of the rotating shaft matched with the inner ring of the angular contact ball bearing is installed on a lever, the lever is Z-shaped, the front end and the rear end of the lever are respectively provided with a threaded hole, the middle of the lever is provided with the unthreaded hole, the upper end of the unthreaded hole is provided with a threaded hole, a jackscrew is installed in the threaded hole in the upper end of the middle unthreaded hole and used for locking the rotating shaft and the lever, and an upper spring pull rod of a sliding plate and a tension spring is installed in the threaded hole in the rear end of the lever; the lower end of the sliding plate is cylindrical, under the action of an extension spring, the lower surface of the cylindrical sliding plate is in contact with a sensor head arranged on a sensor fixing block, and the front end of the lever is connected with the tappet frame through a threaded hole; the side surface of the tappet rod frame is provided with a step long hole, the upper end of the step long hole is provided with an unthreaded hole and a threaded hole, the fixed position of the tappet rod frame on the lever can be adjusted through the step long hole tappet rod frame, a measuring tappet rod is installed at the unthreaded hole on the tappet rod frame, a jackscrew is arranged on the threaded hole at the unthreaded hole, the jackscrew is provided with a bolt with an external thread, and one end surface of the jackscrew is provided with an inner hexagonal groove which is used for locking the measuring tappet rod; the measuring tappet is in a round rod shape and made of hard alloy so as to ensure the high wear resistance and high rigidity of the measuring tappet; it is used as a measuring head installed on the measuring part of the roller mechanism and is contacted with the outer surface of the measured object in real time.
The invention relates to a movable part of a roller mechanism, which comprises a pointer, a linear guide rail assembly, a toothed belt, a cam guider, a cylinder adjusting connecting block, a high-precision crossed roller bearing, an adjusting bolt, a protective cover, a belt wheel, a bearing, a roller fixing shaft and a roller mechanism fixing plate, wherein the pointer is in an L-right angle shape, one right-angled edge is provided with 2 90-degree counter bores, the other right-angled edge is provided with a sharp corner, the pointer is arranged on the side surface of the cylinder adjusting connecting block through a screw to indicate the height position of the movable part of the roller mechanism, the linear guide rail assembly comprises a linear guide rail and a sliding block, the upper surface of the linear guide rail is provided with uniformly distributed shoulder unthreaded holes, two side surfaces of the linear guide rail are provided with V-shaped grooves, the sliding block is in a square shape and is provided with a ball, the upper surface of the sliding block is provided with a threaded hole, the sliding block is matched with the grooves on the linear guide rail and the two V-shaped side surfaces through the ball, the bottom surface of a linear guide rail in the linear guide rail assembly is matched with two parallel grooves on a fixed plate of the roller mechanism and is connected to a threaded hole in the groove by adopting a screw, and the upper surface of a sliding block in the linear guide rail assembly is matched with the groove on the side surface and is connected to the threaded hole in the groove by adopting a screw; the shape of the toothed belt is circular, the toothed belt is made of non-metallic materials and is flexible, the width of the toothed belt is slightly smaller than that of the belt wheel, the teeth on one side of the toothed belt are the same as those of the belt wheel, the inner teeth of the toothed belt are meshed with the outer circle of the belt wheel in a tooth form, and the outer circle surface of the toothed belt is matched with the outer circle of the head of the cam guider in a matching manner; the cam guider is composed of an installation rod and a rotating head, the installation rod is a cylindrical shaft rod, fine thread threads are arranged at the position of the shaft rod, the thread threads of the shaft rod are connected and matched with threaded holes in the side face of a roller mechanism fixing plate, the axis of the roller mechanism fixing plate is perpendicular to the installation surface of the roller mechanism fixing plate, the rotating head of the cam guider is a needle bearing, an inner ring is fixed on the shaft rod, an outer ring can rotate, a hexagon socket is arranged at the center of the end face of the rotating head, and the hexagon socket is used for screwing a threaded rod of the cam guider during installation; the cylinder adjusting connecting block is cross-shaped, a square boss is arranged on one end face of the cylinder adjusting connecting block and is installed in square grooves of two vertical faces of a roller mechanism fixing plate, square flanges are arranged on two sides of the boss of the cylinder adjusting connecting block and are provided with unthreaded holes, the square flanges are matched with the two vertical faces of the roller mechanism fixing plate, screws penetrate through the square flanges and are provided with the unthreaded holes to be connected with threads on the two vertical faces of the roller mechanism fixing plate, a threaded hole is formed in the horizontal plane of the cylinder adjusting connecting block, and threaded holes and key grooves are formed in two side faces of the cylinder adjusting connecting block and are used for installing a pinch roller mechanism; the inner ring of the crossed roller bearing is provided with threaded through holes which are uniformly distributed on the circumference, the outer circle of the crossed roller bearing is provided with stepped through holes which are uniformly distributed on the circumference, and the middle rollers are distributed in a crossed structure. The rotating precision of the outer ring of the crossed roller bearing is more than P4, so that the requirement of the crossed roller bearing as a roller on high precision is ensured, the inner ring of the crossed roller bearing is connected with a roller fixing shaft, the outer ring of the crossed roller bearing is connected with a belt wheel, and the height position of the high-precision crossed roller bearing can be manually observed from the scale position indicated by a pointer on a scale; the adjusting bolt is of a round rod type and is provided with a fine full thread, one side end face of the adjusting bolt is provided with an inner hexagonal groove, the inner hexagonal groove is arranged in a threaded hole in the horizontal plane of the air cylinder adjusting connecting block, and the height position of the high-precision crossed roller bearing arranged on the movable part of the roller mechanism during lifting is changed by adjusting the screwing length of the adjusting bolt and the air cylinder adjusting connecting block; the protective cover is formed by bending a metal plate, the upper part of the protective cover is provided with a V-shaped opening, the protective cover is arranged on the side surface of the roller mechanism fixing plate and is used for protecting a toothed belt and a belt wheel; the belt wheel is composed of a toothed wheel body and a flange, wherein the flange is annular and is installed on one side of the toothed wheel body, the toothed wheel body is in the shape of a circular-bead cylinder, circular-bead unthreaded holes and threaded through holes are circumferentially and uniformly distributed in the side surface of the toothed wheel body, an inner hole of the toothed wheel body is a circular-bead unthreaded hole, a bearing is installed in a large unthreaded hole, and the maximum outer diameter of the bearing is smaller than the outer circle diameter of the bearing. The inner diameter of the toothed belt wheel is provided with a stepped unthreaded hole, a bearing is arranged in the stepped unthreaded hole, the outer circle of the toothed wheel body is provided with trapezoidal teeth which are uniformly distributed on the circumference, and the trapezoidal teeth are meshed with the inner teeth of the toothed belt; the bearing is a deep groove ball bearing, the outer ring of the bearing is matched with the inner hole of the belt wheel, and the inner ring of the bearing is matched with the shaft diameter of the roller fixing shaft; the roller fixing shaft is in a cylindrical stepped shaft shape, center holes with threads are formed in centers of two ends of the shaft, the large-shaft-diameter end face is provided with threaded holes which are uniformly distributed on the circumference and shoulder unthreaded holes which are uniformly distributed on the circumference, the roller fixing shaft can be connected to a roller mechanism fixing plate through screws, 2 large-shaft-diameter end faces of the roller fixing shaft are matched with bottom faces of blind holes which are symmetrically arranged on the side face of the roller mechanism fixing plate, and the outer circle surface of the large-shaft-diameter of the roller fixing shaft is matched with the blind holes which are symmetrically arranged on the side face of the roller mechanism fixing plate; the roller mechanism fixing plate is in a rectangular plate shape, the middle of the lower end of the roller mechanism fixing plate is provided with a square hole, and the square hole is communicated with the lower edge; four threaded holes are formed in two sides of the square hole and used for mounting a fixing plate on the speed reduction motor part, a v-shaped groove and a threaded hole are formed in the upper end of the roller mechanism fixing plate, a cam guider is mounted in the threaded hole, the outer circle surface of the head part of the cam guider is matched with the surface of the shaft end of a workpiece and used for axially positioning the workpiece, and a parallel groove and a stepped unthreaded hole are formed in one side surface of the roller mechanism fixing plate and used for mounting a guide rail of the linear guide rail assembly; the middle part of the roller mechanism fixing plate is provided with a key groove for mounting a rectangular key; the upper part of the other side surface of the roller mechanism fixing plate is provided with two centrosymmetric step holes, smooth holes are uniformly distributed around the two step holes, the step holes are matched and connected with a roller fixing shaft, two vertical surfaces of the roller mechanism fixing plate are provided with square grooves and threaded holes, an air cylinder adjusting connecting block is matched and connected with the square grooves, crossed roller bearings are symmetrically arranged with the central surface of the roller mechanism fixing plate, two crossed roller bearings arranged on the movable part of the roller mechanism are arranged in an inverted triangle with a cam guider, a toothed belt is single-sided inner teeth, inner teeth of the toothed belt are matched with the teeth of two belt wheels connected with the outer ring of the crossed roller bearings and a belt wheel connected with a motor, the outer surface of the toothed belt is matched with the bearing outer ring of the cam guider, when the belt wheel connected with the motor rotates, the toothed belt matched and connected with the outer diameter of the teeth of the belt wheel drives the belt wheel connected with the outer ring of the crossed roller bearings to rotate, the corresponding crossed roller bearing outer race rotates.
The swing pinch roller mechanism comprises a corner cylinder, a rectangular key, a corner cylinder fixing frame, a cam guider, a lengthened guide rod, an oil pressure buffer, a high-precision crossed roller bearing, an oil pressure buffer bracket, a swing rod and a guide plate, wherein a piston rod of the corner cylinder can rotate and lift at an angle of 90 degrees, and the end part of the piston rod is provided with a square section and a threaded inner hole; the lengthening guide rod is cylindrical and hollow and is connected with the end part of a piston rod of the corner cylinder, and the corner cylinder is used for adjusting the strokes of the oscillating rod and the cam guider arranged on the corner cylinder; the swing rod is L-shaped, one end of the swing rod is provided with a step unthreaded hole, the step unthreaded hole is used for being connected with a piston rod of the air cylinder, the other end of the swing rod is provided with a large chamfer, the side surface of the swing rod is provided with a threaded through hole, the side surface of the swing rod is provided with a rectangular groove, the lengthened guide rod is of a T-shaped structure, a T-shaped surface of the lengthened guide rod is arranged in the rectangular groove of the swing rod, the cam guider is used as a pinch roller of the swing pressing wheel mechanism, a threaded hole of the cam guider is connected with threads on a guide rod of the cam guider, and the cam guider can rotate and lift along with the swing rod by 90 degrees; the corner cylinder fixing frame is of a T-shaped structure, a large unthreaded hole is formed in the center of a long edge of the T-shaped structure, a piston rod of a corner cylinder can penetrate through the large unthreaded hole, 4 small unthreaded holes are uniformly distributed around the large unthreaded hole, the long edge of the T-shaped structure of the corner cylinder fixing frame is connected to the top of the corner cylinder, and the top surface of the T-shaped structure at the other end of the corner cylinder fixing frame is connected to the cylinder adjusting connecting block; the hydraulic buffer is arranged on a hydraulic buffer support, the hydraulic buffer support is connected to the corner cylinder fixing frame, and when a piston rod of the corner cylinder rotates for 90 degrees, the guide plate and the piston head of the hydraulic buffer are in contact buffering.
The shaft end positioning mechanism comprises a pneumatic throttle valve, a rectangular key, a jackscrew, a bearing, a positioning bearing fixing shaft, a positioning wheel bracket, a double-shaft cylinder and a positioning cylinder bracket, wherein the pneumatic throttle valve is arranged on a threaded hole on the side surface of the double-shaft cylinder and is connected by adopting a tapered thread to adjust the movement speed of a piston of the double-shaft cylinder; the positioning wheel support is of a right-angle L shape, and is provided with a long short side, a long side provided with a threaded hole, the upper surface of the long side is connected with the double-shaft cylinder, the other right-angle side provided with a unthreaded hole, and the positioning bearing fixing shaft is arranged in the threaded hole of the long side of the positioning wheel support; the positioning air cylinder support is of a right-angle L shape and is provided with long and short edges, the long edges are provided with threaded holes, the double-shaft air cylinder is installed on the long edges of the positioning air cylinder support, and the short edges of the positioning air cylinder support are connected with the side face of the roller mechanism fixing plate in a matched mode.
The speed reducing motor part comprises a motor, a speed reducer, a fixing plate and a belt wheel, wherein the fixing plate is rectangular, two long holes and threaded holes are formed in the side surface of the fixing plate, a unthreaded hole is formed in the center of the fixing plate and matched with a flange at the side end of a shaft of the speed reducer, the fixing plate is connected with a fixing plate of a roller mechanism through the long holes in the fixing plate, the tightness of a toothed belt matched with the belt wheel can be adjusted when the mounting position of the fixing plate on the fixing plate of the roller mechanism is adjusted, the motor is connected with a flange at the tail end of the speed reducer, and the belt wheel is connected with the shaft diameter at the front end of the speed reducer.
The roller mechanism fixing part comprises a gasket, a locking screw, a fixing support, a cylinder, a pneumatic throttle valve, a cylinder supporting head and a scale, wherein the gasket is a rectangular copper sheet, two side surfaces of the gasket are respectively matched with a dovetail groove straight edge and a central guide rail straight edge of the bottom surface of the fixing support of the fixing part, so that the situation that the locking screw directly contacts the central guide rail 4 to cause damage is prevented, and meanwhile, the gasket can increase the friction force between the fixing support and the central guide rail 4; the locking screw is a socket head cap screw, the thread of the locking screw is matched with the thread on the fixing support, the end face of the thread is in matched contact with the surface of the gasket, and the locking screw is used for locking the driving end of the high-precision roller lower driving mechanism; the structure of the fixing support is L-shaped, a single dovetail groove is formed in the bottom surface of the L-shaped, a shoulder threaded hole is formed in a surface parallel to a straight edge of the single dovetail groove and communicated with the straight edge of the single dovetail groove, a locking screw is connected with the shoulder threaded hole in the fixing support and used for locking the driving end of the high-precision roller lower driving mechanism, the straight edge of the single dovetail groove is matched with a mounting gasket to play a locking role, the dovetail edge of the bottom surface of the fixing support can be matched with the dovetail surface of a central guide rail 4 on the platen, two parallel grooves symmetrical to the central surface are formed in an L-shaped vertical surface of the fixing support, threaded holes are formed in the grooves and connected with a sliding block on a linear guide rail assembly, a rectangular through hole is formed in the middle of the L-shaped vertical surface of the fixing support, and a speed reducer is installed on the rectangular through hole; the cylinder bracket is in an L-shaped plate shape, wherein 3 shoulder unthreaded holes are formed in one side edge of the cylinder bracket and used for mounting screws, so that the cylinder bracket is connected to the fixed bracket in a matching manner, and shoulder unthreaded holes are formed in the lower surface of the cylinder bracket and used for mounting screws, so that the bottom of the cylinder is connected to the upper surface of the cylinder bracket; the pneumatic throttle valve is characterized in that the air cylinder is a double-acting thin air cylinder, the cylinder body is square, shoulder holes and threaded holes are formed in the west periphery of the upper surface and the west periphery of the lower surface of the cylinder body, air inlet and outlet holes and a magnetic switch mounting groove are formed in the side surface of the cylinder body, the air inlet and outlet holes are matched with threads of the pneumatic throttle valve, a magnetic switch is arranged in the magnetic switch mounting groove and used for sensing the position of a detection piston, a magnetic ring is arranged at the position of a piston of the air cylinder, an external thread is formed in the head of a piston rod, the bottom surface of the air cylinder is matched with the upper surface of an air cylinder support, the air cylinder is connected to the air cylinder support through a screw, and the external thread at the head of a piston rod of the air cylinder is matched with a threaded hole of an air cylinder support head; the pneumatic throttle valve is provided with an external thread mounting head, a quick-change type air pipe interface and a knob for adjusting air flow, the external thread mounting head is in threaded connection with an air inlet and an air outlet of the cylinder, the air pipe interface is connected with an air pipe, and the knob for adjusting the pneumatic throttle valve can control the air flow of the pneumatic throttle valve so as to control the lifting speed of a piston of the cylinder; the cylinder support head is cylindrical, one end face of the cylinder support head is a plane, the cylinder support head is in contact fit with the end face of the adjusting bolt and is used for bearing the gravity of the movable part of the roller mechanism and other objects connected to the roller mechanism, and the other end face of the cylinder support head is provided with a threaded blind hole which is in threaded connection fit with the head part of the cylinder piston rod; the scale is in a rectangular plate shape, a scribed line for indicating distance and two countersunk holes are formed in the surface of one side of the scale, and the scale is arranged in the grooves in the two side faces of the fixed support through the countersunk holes.
The driven end of the high-precision roller lower driving mechanism comprises a roller mechanism measuring part, a roller mechanism movable part, a swinging pressing wheel mechanism, a cam guider, a photoelectric encoder part and a roller mechanism fixing part, wherein the roller mechanism measuring part is the same as the roller mechanism measuring part at the driving end of the high-precision roller lower driving mechanism in structure; the movable part of the roller mechanism is arranged to have the same structure as the movable part of the roller mechanism at the driving end of the high-precision roller lower driving mechanism; the swing pinch roller mechanism is symmetrical to the swing pinch roller mechanism at the driving end of the high-precision roller lower driving mechanism, the swing directions of the swing pinch roller mechanisms are opposite, and the cam guider is installed on the roller mechanism fixing part and matched with the shaft end face of the workpiece.
The photoelectric encoder part of the invention is composed of a belt wheel, an encoder fixing plate, an encoder bracket, a coupling, a photoelectric encoder, a small shaft, a bearing, an inner shaft sleeve, an outer shaft sleeve and a locking nut, wherein the encoder bracket of the belt wheel is of a rectangular structure, the middle of the encoder bracket is provided with a square opening, one end surface is provided with a unthreaded hole and a threaded hole, the other end surface is provided with a shoulder unthreaded hole and a threaded hole which are respectively connected with the photoelectric encoder and the encoder fixing plate, the bearing is arranged in the shoulder unthreaded hole of the encoder bracket, the end surfaces of the inner ring and the outer ring of the bearing are matched with the end surfaces of the inner shaft sleeve and the outer shaft sleeve, the inner ring of the bearing is matched with the outer circle of the small shaft, the small shaft is a stepped shaft with a plurality of shoulders, the surface of one end shaft of the small shaft is provided with a key groove, the adjacent shaft diameter is provided with a thread, the shaft diameter of the small shaft with the key groove is matched and connected with the belt wheel, the small shaft passes torque by the key, and the shaft diameter of the small shaft is provided with the locking nut, the end face of the locking nut is matched with the end face of the inner shaft sleeve, the shaft diameter of the small shaft without the key groove is connected with an inner hole of the coupling, and the inner hole of the other side of the coupling is matched and connected with the extending shaft diameter of the photoelectric encoder.
The invention has the advantages of novel structure, high rotation precision of the roller, lifting, wide range of applicable workpiece shaft diameters, low assembly difficulty of key parts, compact structure and convenient adjustment, can realize the rotation driving of various rod parts such as optical shafts, lead screws, stepped shaft rotations and the like with equal diameters, variable diameters, no central hole, different lengths and different diameters, and solves the problems of low precision, easy slipping and poor adaptability when the roller is used as a reference for rotation measurement; the invention solves the problem that the shafts with the excircle as the reference and with high precision requirements cannot be automatically straightened, fills the market blank of the high-precision shafts for automatic straightening, and can be applied to shaft detection equipment.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a left side view of the present invention;
FIG. 4 is a front view of the active end of the high precision roller down drive mechanism of the present invention;
FIG. 5 is a left side view of the active end of the high precision roller down drive mechanism of the present invention;
FIG. 6 is a front view of the driven end of the high precision roller lower drive mechanism of the present invention;
FIG. 7 is a left side view of the driven end of the high precision roller lower drive mechanism of the present invention;
FIG. 8 is a front view of the movable portion of the roller mechanism of the present invention;
FIG. 9 is a plan view of the movable portion of the roller mechanism of the present invention;
FIG. 10 is a left side view of the movable portion of the roller mechanism of the present invention;
FIG. 11 is a view of the movable portion of the roller mechanism of the present invention viewed from the direction C;
FIG. 12 is a front view of the fixed portion of the roller mechanism of the present invention;
FIG. 13 is a top view of the fixed assembly of the roller mechanism of the present invention;
FIG. 14 is a front elevational view of the shaft end positioning mechanism of the present invention;
FIG. 15 is a top plan view of the shaft end positioning mechanism of the present invention;
FIG. 16 is a front view of the measuring section of the roller mechanism of the present invention;
FIG. 17 is a plan view of a measuring section of the roller mechanism of the present invention;
FIG. 18 is a left side view of the measuring section of the roller mechanism of the present invention;
FIG. 19 is a view of the measuring section of the roller mechanism of the present invention in the direction B;
FIG. 20 is a front elevational view of the oscillating pinch wheel mechanism of the present invention;
FIG. 21 is a left side elevational view of the oscillating pinch wheel mechanism of the present invention;
fig. 22 is a front view of the reduction motor assembly of the present invention;
fig. 23 is a plan view of the reduction motor assembly of the present invention;
FIG. 24 is a front view of the photoelectric encoder portion of the present invention;
FIG. 25 is a plan view of the photoelectric encoder unit of the present invention.
Detailed Description
Comprises two parts, namely a high-precision roller lower driving mechanism driven end 1.1 and a high-precision roller lower driving mechanism driving end 1.2, wherein the lower surfaces of the high-precision roller lower driving mechanism driven end 1.1 and the high-precision roller lower driving mechanism driving end 1.2 are planes which are matched with the upper surface of a workbench 3 and can slide on the surface of the workbench, a central guide rail 4 is arranged at the central position of the upper surface of the workbench 3, the section of the central guide rail 4 is in a single dovetail shape, the high-precision roller lower driving mechanism driven end 1.1 and a fixing bracket 1.2.6-3 of the high-precision roller lower driving mechanism driving end 1.2 are provided with a single dovetail groove structure which is matched with a dovetail inclined plane of the central guide rail 4, the installation position of the high-precision roller lower driving mechanism driven end 1.1 and the high-precision roller lower driving mechanism driven end 1.1 are adjustable on the central guide rail 4 and can be locked on the inclined plane of the central guide rail 4 by locking screws 1.2.6-2, and the high-precision roller lower driving mechanism driven ends 1.2 are respectively positioned at two ends of a circular workpiece 2, the excircle surfaces of two ends of the round workpiece 2 are tangent to the excircles of the high-precision crossed roller bearings 1.2.2-6 in the movable part 1.2.2 of the roller driving mechanism; one end face of a workpiece 2 is tangent to the surface of an outer ring of a bearing 1.2.4-5 on a shaft end positioning mechanism on a driving end 1.2 of a high-precision roller lower driving mechanism, the other end face of the workpiece 2 is tangent to the surface of an outer ring of a cam guider 1.1-1 on a driven end 1.1 of the high-precision roller lower driving mechanism, an outer ring of a swing pressing wheel mechanism 1.2.3 and an outer ring of a cam guider of the swing pressing wheel mechanism 1.1.3 in the high-precision lower driving mechanism press the outer surfaces of two ends of the workpiece above the workpiece to increase the friction force between the workpiece and the roller mechanism, a motor 1.2.5-1 in the driving end 1.2 of the high-precision roller lower driving mechanism drives an outer ring of a high-precision crossed roller bearing 1.2.2-6 to rotate through a belt wheel 1.2.5-4, a belt wheel 1.2.2.2-9 and a tooth 1.2.2-3, the outer ring of the high-precision crossed roller bearing 1.2-6 drives the workpiece 2 to rotate through the friction force, meanwhile, the outer surface of the other end of the workpiece 2 drives the high-precision crossed roller bearing outer ring in the driven end 1.1 of the high-precision roller lower driving mechanism to rotate under the action of friction force, and the high-precision crossed roller bearing outer ring drives the photoelectric encoder 1.1.5-5 in the photoelectric encoder part 1.1.5 to rotate through a toothed belt wheel and a toothed belt transmission mechanism which are connected with the high-precision crossed roller bearing outer ring, so that the photoelectric encoder 1.1.5-5 records the rotation angle value of the workpiece; a roller mechanism measuring part 1.2.1 and a measuring tappet rod 1.2.1-13 of the roller mechanism measuring part 1.1.1 in the high-precision lower-driving type roller driving mechanism are in contact with the surfaces of two ends of a workpiece 2 and used for detecting radial runout values of the two ends of the workpiece 2.
The driving end 1.2 of the high-precision roller lower driving mechanism comprises: a roller mechanism measuring part 1.2.1, a roller mechanism movable part 1.2.2, a swing pressing wheel mechanism 1.2.3, a shaft end positioning mechanism 1.2.4, a speed reducing motor part 1.2.5 and a roller mechanism fixing part 1.2.6, wherein the roller mechanism fixing part 1.2.6 is provided with a single dovetail groove structure and is used for locking with a dovetail guide rail on a workbench 3, the roller mechanism fixing part 1.2.6 is matched and connected with a slide block on a linear guide rail component 1.2.2-2 in the roller mechanism movable part 1.2.2 through a screw, the speed reducing motor part 1.2.5 is provided with a fixing plate 1.2.5-3 which is matched and connected with a fixing bracket 1.2.6-3 on the roller mechanism fixing part 1.2.6, the speed reducing motor rotates to drive a high-precision roller arranged on the roller mechanism movable part 1, and the fixing plate 1.2.5-3 is provided with a long hole, thus the electric device part 1.2.5 is matched with the fixing bracket 1.2.6-3 on the fixing bracket 1.2.6, and the adjustable positioning mechanism 1.2.2.2.2.2.3 is matched and the end surface of the fixing bracket 1.2.2.2.2.2.2-3 on the positioning mechanism 1.2, and is connected by screw, the pinch roller mechanism 1.2.3 has corner cylinder fixing frame 1.2.3-3, its end face is matched with fixed support 1.2.6-3, and is connected by screw, the movable portion of the roller mechanism 1.2.2 has linear guide rail component 1.2.2-2, the guide rail on the linear guide rail component 1.2.2-2 is matched with side face of fixed plate of the roller mechanism, and is connected by screw, the slide block on the linear guide rail component 1.2.2-2 is matched and connected with fixed support 1.2.6-3, and two sides of fixed portion of roller mechanism 1.2.6 are respectively equipped with cylinder 1.2.6-5 for pushing the movable portion of roller mechanism 1.2.2 to make vertical lifting movement, the measuring portion of roller mechanism 1.2.1 has connecting frame 1.2.1-15, and is connected with cylinder regulating connecting block 1.2.2-5 in the movable portion of roller mechanism 1.2.2 by screw, and the measuring portion of roller mechanism 1.2.1 has tappet 1.2.1.1-13, under the action of the extension spring 1.2.1-8, measuring the real-time matching of the outer circles of the tappets 1.2.1-13 and the outer circles at two ends of the workpiece 3, and monitoring the radial runout at two ends of the workpiece.
The roller mechanism measuring part 1.2.1 comprises a locking screw 1.2.1-1, a guard plate 1.2.1-2, a bearing end cover 1.2.1-3, an angular contact ball bearing 1.2.1-4, a rotating shaft 1.2.1-5, a sensor 1.2.1-6, a sensor fixing block 1.2.1-7, a tension spring 1.2.1-8, a sliding plate 1.2.1-9, a lever 1.2.1-10, a jackscrew 1.2.1-11, a tappet frame 1.2.1-12, a measuring tappet 1.2.1-13, a measuring bracket 1.2.1-14, a connecting frame 1.2.1-15, an upper spring pull rod 1.2.1-16, a lower spring pull rod 1.2.1-17 and a shaft sleeve 1.2.1-18, wherein the roller mechanism measuring part 1.2.1 is connected with the roller mechanism fixing part 1.2.1.1.1-15 through the connecting frame 1.2.1.1-15, the shaft rod of the roller mechanism fixing part 1.6, and the locking screw is in a round head shape, the excircle of the big round head is provided with knurls, the excircle of the shaft diameter with the smallest diameter is provided with threads, the knurls at the position of the big round head of the locking screw 1.2.1-1 are helpful for increasing the friction force when the locking screw 1.2.1-1 is manually rotated, the shaft diameter of the locking screw with the threads is matched with the threads of the sensor fixing block 1.2.1-7, and the function of the locking screw is that the sensor 1.2.1-6 is tightly installed and matched on the sensor fixing block 1.2.1-7; the protection plate 1.2.1-2 is an L-shaped thin-wall plate, the surface of the protection plate is provided with a counter bore, and a screw is matched with the counter bore and is arranged on two sides of the measuring bracket 1.2.1-14 to protect the sensor 1.2.1-6; the bearing end cover 1.2.1-3 is square, the end surface of the bearing end cover is provided with a circular boss, four unthreaded holes are uniformly distributed around the square, after the bearing end cover 1.2.1-3 penetrates through the four unthreaded holes through screws to be tightly connected with the threaded holes on the side surface of the measuring support 1.2.1-14, the circular boss on the end surface of the bearing end cover 1.2.1-3 is matched with the outer ring of the angular contact ball bearing 1.2.1-4 to adjust the axial clearance of the angular contact ball bearing 1.2.1-4; one side of the inner side of the bearing outer ring of each angular contact ball bearing 1.2.1-4 is provided with an oblique angle, the bearing outer ring is used in pairs, is installed face to face and can bear axial and radial loads, the excircle of the bearing outer ring is matched with the unthreaded hole on the measuring bracket 1.2.1-14, the end face of the bearing outer ring without the oblique angle is matched with the end face of the annular boss of the bearing end cover, the bearing outer ring is free from the oblique angle end face, the shaft diameter of the bearing inner ring of each angular contact ball bearing 1.2.1-4 is matched with the excircle of the shaft diameter of the rotating shaft 1.2.1-5, and the end face of one bearing inner ring is respectively matched with the end face of the shaft sleeve 1.2.1-18 and the end face of the shoulder of the rotating shaft 1.2.1-5; the end surface of the other bearing inner ring is respectively matched with the end surface of the shaft sleeve 1.2.1-18 and the side surface of the spring retainer ring, the rotating shaft 1.2.1-5 is a shoulder shaft with a circular retaining edge, and a circular groove is arranged at the shaft diameter position far away from the circular retaining edge and used for installing the spring retainer ring; the sensor 1.2.1-6 is in a ladder cylinder shape and is composed of a fixed ladder cylinder and a sliding measuring rod, the sliding measuring rod is a cylinder rod and can freely slide in the center of the ladder cylinder, the head of the measuring rod is provided with a spherical measuring head which can be detached, the sensor 1.2.1-6 adopts a differential transformation mode to measure measuring head displacement, the measuring precision is less than or equal to 0.001mm, the side surface of the sensor fixing block 1.2.1-7 is in an L shape, the short L-shaped part is provided with a unthreaded hole, the long L-shaped part is provided with an unthreaded hole, the middle section of the unthreaded hole is provided with a rectangular opening, the unthreaded hole is divided into two semicircles by the rectangular opening, the end surface of the long L-shaped part of the sensor fixing block 1.2.1-7 is provided with an unthreaded hole which is communicated with one side surface of the rectangular opening, the other side surface of the square opening is provided with a threaded blind hole, and the threaded blind hole is coaxial with the unthreaded hole of the end surface of the long L-shaped part, the locking screw 1.2.1-1 shaft lever penetrates through the unthreaded hole on the end face of the long L-shaped part, the threaded part on the locking screw 1.2.1-1 shaft lever is matched and connected with the threaded blind hole on the sensor fixing block 1.2.1-7, the extension spring 1.2.1-8 is a cylindrical spiral spring with an extension function, two ends of the extension spring are provided with hooks, the hooks at the two ends are respectively connected in the unthreaded holes of the upper spring pull rod 1.2.1-16 and the lower spring pull rod 1.2.1-17, and the extension spring is used for applying spring force to one end of the lever 1.2.1-10, so that the lever 1.2.1-10 can rotate around the axis 1.2.1-5 of the rotating shaft; the measuring support 1.2.1-14 is rectangular, the upper end of the measuring support is provided with a rectangular groove and a unthreaded hole, the periphery of the measuring support is provided with threaded holes, an angular contact ball bearing 1.2.1-4 is arranged in the unthreaded hole of the measuring support 1.2.1-14, the inner ring of the angular contact ball bearing 1.2.1-4 is matched with the excircle of the two ends of the rotating shaft 1.2.1-5, the middle shaft diameter part of the rotating shaft 1.2.1-5 matched with the inner ring of the angular contact ball bearing 1.2.1-4 is arranged on a lever 1.2.1-10, the lever 1.2.1-10 is Z-shaped, the front end and the rear end of the handle are respectively provided with a threaded hole, the middle part of the handle is provided with a unthreaded hole, the upper end of the unthreaded hole is provided with a threaded hole, the threaded hole at the upper end of the unthreaded hole in the middle part is provided with a jackscrew, the locking device is used for locking the rotating shaft 1.2.1-5 and the lever 1.2.1-10, and the threaded hole at the rear end of the lever 1.2.1-10 is provided with a sliding plate 1.2.1-9 and an upper spring pull rod 1.2.1-16 of an extension spring 1.2.1-8; the lower end of the sliding plate 1.2.1-9 is cylindrical, under the action of the extension spring 1.2.1-8, the cylindrical lower surface is contacted with the head of the sensor 1.2.1-6 arranged on the sensor fixing block 1.2.1-7, and the front end of the lever 1.2.1-10 is connected with the tappet rod frame 1.2.1-12 through a threaded hole; the lateral surface of each tappet frame 1.2.1-12 is provided with a stepped long hole, the upper end of the stepped long hole is provided with a unthreaded hole and a threaded hole, the fixed position of the tappet frame 1.2.1-12 on the lever 1.2.1-10 can be adjusted through the stepped long hole tappet frame 1.2.1-12, the unthreaded hole on the tappet frame 1.2.1-12 is provided with a measuring tappet 1.2.1-13, the threaded hole at the unthreaded hole is provided with a jackscrew 1.2.1-11, the jackscrew 1.2.1-11 is provided with a bolt with an external thread, and one end surface is provided with an internal hexagonal groove which is used for locking the measuring tappet 1.2.1-13; the measuring tappet 1.2.1-13 is in a round rod shape and made of hard alloy so as to ensure the characteristics of high wear resistance and high rigidity; the measuring part of the roller mechanism is provided with a measuring head of 1.2.1, and the measuring head is contacted with the outer surface of a measured object in real time.
The invention relates to a movable part assembly 1.2.2 of a roller mechanism, which comprises a pointer 1.2.2-1, a linear guide rail assembly 1.2.2-2, a toothed belt 1.2.2-3, a cam guider 1.2.2-4, an air cylinder adjusting connecting block 1.2.2-5, a high-precision crossed roller bearing 1.2.2-6, an adjusting bolt 1.2.2-7, a protective cover 1.2.2-8, a belt wheel 1.2.2-9, a bearing 1.2.2-10, a roller fixing shaft 1.2.2-11 and a roller mechanism fixing plate 1.2.2-12, wherein the pointer 1.2.2-1 is in an L-shaped straight angle shape, one end of the straight angle side is provided with 2 counter bores with 90 degrees, the other end of the straight angle side is provided with a sharp corner, the pointer is arranged on the side surface of the air cylinder adjusting connecting block 1.2.2-5 through a screw to indicate the height position of the movable part assembly 1.2.2.2, the linear guide rail assembly 1.2-2 is composed of a linear guide rail and a sliding block, smooth hole is uniformly distributed on the surface of the linear guide rail, the two side surfaces are provided with V-shaped grooves, the sliding block is square, the sliding block contains a ball, the upper surface of the sliding block is provided with a threaded hole, the sliding block is matched with the linear guide rail and the two V-shaped side grooves through the ball, the sliding block slides on the linear guide rail, the bottom surface of the linear guide rail in the linear guide rail assembly 1.2.2-2 is matched with two parallel grooves on the roller mechanism fixing plate 1.2.2-12 and is connected to the threaded hole in the groove through a screw, and the upper surface of the sliding block in the linear guide rail assembly 1.2.2-2 is matched with the 1.2.6-3 side grooves and is connected to the threaded hole in the groove through a screw; the shape of the toothed belt 1.2.2-3 is circular, the toothed belt is made of non-metallic materials and is flexible, the width of the toothed belt 1.2.2-3 is slightly smaller than that of the belt wheel 1.2.2-9, the inner teeth of one side of the toothed belt are the same as that of the belt wheel 1.2.2-9, the inner teeth of the toothed belt 1.2.2-3 are in tooth-shaped engagement with the excircle of the belt wheel 1.2.2-9, and the excircle surface of the toothed belt 1.2.2-3 is matched with the excircle of the head of the cam guider 1.2.2-4 to be matched; the cam guider 1.2.2-4 is composed of an installation rod and a rotating head, the installation rod is a cylindrical shaft rod, fine thread is arranged at the position of the shaft rod, the thread of the shaft rod is connected and matched with a threaded hole on the side surface of the roller mechanism fixing plate 1.2.2-12, the axis of the roller mechanism fixing plate 1.2.2-12 is vertical to the installation surface of the roller mechanism fixing plate 1.2.2-12, the rotating head of the cam guider 1.2.2-4 is a needle bearing, an inner ring is fixed on the shaft rod, an outer ring can rotate, an inner hexagonal hole is arranged at the center of the end surface of the rotating head, and the inner hexagonal hole is used for screwing a threaded rod of the cam guider 1.2.2-4 during installation; the cylinder adjusting connecting block 1.2.2-5 is in a cross shape, one end face of the cylinder adjusting connecting block is provided with a square boss, the boss is installed in square grooves on two vertical faces of the roller mechanism fixing plate 1.2.2-12, two sides of the boss of the cylinder adjusting connecting block 1.2.2-5 are provided with square flanges, each square flange is provided with a unthreaded hole, each square flange is matched with the two vertical faces of the roller mechanism fixing plate, a screw penetrates through each square flange to be provided with the unthreaded hole to be connected with threads on the two vertical faces of the roller mechanism fixing plate 1.2.2-12, the horizontal plane of the cylinder adjusting connecting block 1.2.2-5 is provided with a threaded hole, and two side faces of the cylinder adjusting connecting block are provided with a threaded hole and a key groove which are used for installing the pressing wheel mechanism 1.2.3; the inner ring of the crossed roller bearing 1.2.2-6 is provided with threaded through holes which are uniformly distributed on the circumference, the outer circle is provided with stepped through holes which are uniformly distributed on the circumference, and the middle rollers are distributed in a cross structure. The rotation precision of the outer ring of the crossed roller bearing 1.2.2-6 is more than P4, so that the high precision requirement of the crossed roller bearing as a roller is ensured, the inner ring of the crossed roller bearing 1.2.2-6 is connected with a roller fixing shaft 1.2.2-11, the outer ring is connected with a belt wheel 1.2.2-9, and the height position of the high-precision crossed roller bearing 1.2.2-6 can be manually observed by a scale position indicated on a scale 1.2.6-8 by a pointer 1.2.2-1; the adjusting bolt 1.2.2-7 is a round rod type and is provided with a fine thread and a full thread, one side end face of the adjusting bolt is provided with an inner hexagonal groove, the adjusting bolt is arranged in a thread hole on the horizontal plane of the cylinder adjusting connecting block 1.2.2-5, and the height position of the movable part of the roller mechanism, which is provided with the high-precision crossed roller bearing 1.2.2-6, is changed by adjusting the screwing length of the adjusting bolt 1.2.2-7 and the cylinder adjusting connecting block 1.2.2-5; the protective cover 1.2.2-8 is formed by bending a metal plate, the upper part of the protective cover is provided with a V-shaped opening, the V-shaped opening is arranged on the side surface of the roller mechanism fixing plate 1.2.2-12 and is used for protecting a toothed belt 1.2.2-3 and a belt wheel 1.2.2-9; the belt wheel 1.2.2-9 is composed of a toothed wheel body and a flange, the flange is circular and is installed on one side of the toothed wheel body, the toothed wheel body is in the shape of a circular-bead cylinder, circular-bead unthreaded holes and threaded through holes are evenly distributed on the side surface of the toothed wheel body, inner holes of the toothed wheel body are circular-bead unthreaded holes, bearings 1.2.2-10 are installed in the large unthreaded holes, and the maximum outer diameter of the inner holes is smaller than the diameter of the outer circle of each bearing. The inner diameter of the toothed belt wheel is provided with a stepped unthreaded hole, a bearing 1.2.2-10 is arranged in the stepped unthreaded hole, the outer circle of the toothed wheel body is provided with trapezoidal teeth which are uniformly distributed on the circumference, and the trapezoidal teeth are meshed with the inner teeth of the toothed belt 1.2.2-3; the bearing 1.2.2-10 is a deep groove ball bearing, the outer ring of the bearing 1.2.2-10 is matched with the inner hole of the belt wheel 1.2.2-9, and the inner ring of the bearing 1.2.2-10 is matched with the shaft diameter of the roller fixed shaft 1.2.2-11; the roller fixing shaft 1.2.2-11 is in a cylindrical stepped shaft shape, the centers of two ends of the shaft are provided with threaded center holes, wherein the large-shaft-diameter end face is provided with threaded holes uniformly distributed on the circumference and shoulder unthreaded holes uniformly distributed on the circumference, so that the roller fixing shaft 1.2.2-11 can be connected to a roller mechanism fixing plate 1.2.2-12 through screws, the 2 roller fixing shafts 1.2.2-11 have large-shaft-diameter end faces matched with the bottom faces of blind holes symmetrically arranged on the side face of the roller mechanism fixing plate 1.2.2-12, and the outer circle surface of the roller fixing shaft 1.2.2-11 has large-shaft-diameter and is matched with the blind holes symmetrically arranged on the side face of the roller mechanism fixing plate 1.2.2-12; the roller mechanism fixing plate 1.2.2-12 is rectangular plate-shaped, the middle part of the lower end of the roller mechanism fixing plate is provided with a square hole, and the square hole is communicated with the lower edge; four threaded holes are formed in two sides of the square hole and used for mounting a fixing plate 1.2.5-3 on a speed reducing motor device 1.2.5, a v-shaped groove and a threaded hole are formed in the upper end of a roller mechanism fixing plate 1.2-12, a cam guider 1.2.2-4 is mounted in the threaded hole, the outer circle surface of the head of the cam guider 1.2.2-4 is matched with the shaft end surface of a workpiece and used for axially positioning the workpiece 2, and a parallel groove and a step unthreaded hole are formed in one side surface of the roller mechanism fixing plate 1.2.2-12 and used for mounting a guide rail of a linear guide rail assembly 1.2.2-2; the middle part of the roller mechanism fixing plate 1.2.2-12 is provided with a key groove for mounting a rectangular key 1.2.4-2; the upper part of the other side surface of the roller mechanism fixing plate 1.2.2-12 is provided with two centrosymmetric step holes, smooth holes are uniformly distributed around the two step holes, the step holes are matched and connected with the roller fixing shaft 1.2.2-11, the two vertical surfaces of the roller mechanism fixing plate 1.2.2-12 are provided with square grooves and threaded holes, the cylinder adjusting connecting block 1.2.2-5 is matched and connected with the square grooves, the crossed roller bearings 1.2.2-6 are symmetrically arranged with the central surface of the roller mechanism fixing plate 1.2.2-12, the two crossed roller bearings 1.2.2-6 on the roller mechanism movable part 1.2.2 are arranged in an inverted triangle with the cam guider 1.2.2-4, the toothed belt 1.2.2-3 is a single-side, the inner teeth of the toothed belt 1.2.2-3 are matched with the belt pulleys 1.2.2-9 connected with the outer ring of the two crossed roller bearings and the toothed belt pulleys connected with the motor 1.2.5-1, the outer surface of the toothed belt 1.2.2-9 is matched with the bearing outer ring of the cam guider 1.2.2-4, when the belt wheel 1.2.5-4 connected with the motor 1.2.5-1 rotates, the toothed belt 1.2.2-9 matched and connected with the belt wheel 1.2.5-4 in outer diameter tooth form drives the belt wheel 1.2.2-9 connected with the outer ring of the crossed roller bearing 1.2.2-6 to rotate, and the corresponding outer ring of the crossed roller bearing 1.2.2-6 rotates.
The swing pinch roller mechanism 1.2.3 comprises a corner cylinder 1.2.3-1, a rectangular key 1.2.3-2, a corner cylinder fixing frame 1.2.3-3, a cam guider 1.2.3-4, a lengthened guide rod 1.2.3-5, an oil pressure buffer 1.2.3-6, a high-precision crossed roller bearing 1.2.3-7, an oil pressure buffer bracket 1.2.3-8, a swing rod 1.2.3-9 and a guide plate 1.2.3-10, wherein a piston rod of the corner cylinder 1.2.3-1 can rotate and ascend and descend by an angle of 90 degrees, and the end part of the piston rod is provided with a square section and a threaded inner hole; the lengthened guide rod 1.2.3-5 is cylindrical and hollow and is connected with the end part of a piston rod of the corner cylinder 1.2.3-1, and the corner cylinder 1.2.3-1 has the function of adjusting the stroke of the swing rod 1.2.3-9 and the cam guider 1.2.3-4 arranged on the corner cylinder; the shape of the swing rod 1.2.3-9 is L-shaped, one end of the swing rod is provided with a step unthreaded hole which is used for being connected with a piston rod of a cylinder, the other end of the swing rod 1.2.3-9 is provided with a large chamfer, the side surface of the swing rod is provided with a threaded through hole, the side surface of the swing rod 1.2.3-9 is provided with a rectangular groove, the lengthened guide rod 1.2.3-5 is in a T-shaped structure, the T-shaped surface of the lengthened guide rod is arranged in the rectangular groove of the swing rod 1.2.3-9, the cam guider 1.2.3-4 is used as a 1.2.3 pinch roller of the swing pinch roller mechanism, the threaded hole of the lengthened guide rod is connected with the thread on the guide rod of the cam guider 1.2.3-4, and the lengthened guide rod can rotate and lift at 90 degrees along with the swing rod 1.2.3-9; the corner cylinder fixing frame 1.2.3-3 is of a T-shaped structure, the center of a long edge of the T-shaped structure is provided with a large unthreaded hole, a piston rod containing the corner cylinder 1.2.3-1 can penetrate through the large unthreaded hole, 4 small unthreaded holes are uniformly distributed on the periphery of the large unthreaded hole, the long edge of the T-shaped structure of the corner cylinder fixing frame 1.2.3-3 is connected to the top of the corner cylinder 1.2.3-1, and the top surface of the T-shaped structure at the other end of the corner cylinder fixing frame 1.2.3-3 is connected to the cylinder adjusting connecting block 1.2.2-5; the hydraulic buffer 1.2.3-8 is arranged on the hydraulic buffer support 1.2.3-8, the hydraulic buffer support 1.2.3-8 is connected on the corner cylinder fixing frame 1.2.3-3, and when the piston rod of the corner cylinder 1.2.3-1 rotates for 90 degrees, the guide plate 1.2.3-10 and the piston head of the hydraulic buffer 1.2.3-6 perform contact buffering.
The shaft end positioning mechanism 1.2.4 comprises a pneumatic throttle valve 1.2.4-1, a rectangular key 1.2.4-2, a jackscrew 1.2.4-3, a bearing 1.2.4-4, a positioning bearing fixing shaft 1.2.4-5, a positioning wheel bracket 1.2.4-6, a double-shaft cylinder 1.2.4-7 and a positioning cylinder bracket 1.2.4-8, wherein the pneumatic throttle valve 1.2.4-1 is arranged on a threaded hole on the side surface of the double-shaft cylinder 1.2.4-7 and is connected by adopting a tapered thread to adjust the movement speed of a piston of the double-shaft cylinder 1.2.4-7; the rectangular key 1.2.4-2 is arranged in a key groove of the positioning wheel support 1.2.4-6, the rectangular key 1.2.4-2 enables a bearing 1.2.4-4 of the shaft end positioning mechanism 1.2.4 to be arranged in the center, the bearing 1.2.4-4 is arranged on a positioning bearing fixing shaft 1.2.4-5, the positioning bearing fixing shaft 1.2.4-5 is provided with threads, the thread part of the positioning bearing fixing shaft is arranged in a thread hole of the positioning wheel support 1.2.4-6, the positioning wheel support 1.2.4-6 is in a right-angle L shape and is provided with a long short side and a long side, the long side is provided with a thread hole, the upper surface of the long side is connected with the double-shaft cylinder 1.2.4-7, the other side is provided with a light hole, and the positioning bearing fixing shaft 1.2.4-5 is arranged in the thread hole of the long side of the positioning wheel support 1.2.4-6; the positioning cylinder support 1.2.4-8 is of a right-angle L shape and is provided with long and short sides, the long sides are provided with threaded holes, the double-shaft cylinder 1.2.4-7 is arranged on the long sides of the positioning cylinder support 1.2.4-8, and the short sides of the positioning cylinder support 1.2.4-8 are connected with the side faces of the roller mechanism fixing plates 1.2.2-12 in a matched mode.
The speed reduction motor assembly 1.2.5 comprises a motor 1.2.5-1, a speed reducer 1.2.5-2, a fixing plate 1.2.5-3 and a belt wheel 1.2.5-4, wherein the fixing plate 1.2.5-3 is rectangular, two long holes and threaded holes are formed in the side surface of the fixing plate, a light hole is formed in the center of the fixing plate and matched with a flange at the shaft side of the speed reducer 1.2.5-2, the fixing plate 1.2.5-3 is connected with a fixing plate 1.2.2-12 of a roller mechanism through the long holes in the fixing plate 1.2.5-3, the tightness of a toothed belt 1.2.2-3 matched with the belt wheel 1.2.5-4 can be adjusted when the fixing plate 1.2.2-12 of the roller mechanism is adjusted, the motor 1.2.5-1 is connected with a flange at the tail end of the speed reducer 1.2.5-2, and the belt wheel 1.2.5-4 is connected with a shaft at the front end of the speed reducer 1.2.5-2.
The roller mechanism fixing part 1.2.6 comprises a gasket 1.2.6-1, a locking screw 1.2.6-2, a fixing support 1.2.6-3, an air cylinder support 1.2.6-4, an air cylinder 1.2.6-5, a pneumatic throttle valve 1.2.6-6, an air cylinder support head 1.2.6-7 and a scale 1.2.6-8, wherein the gasket 1.2.6-1 is a rectangular copper sheet, and two side surfaces of the rectangular copper sheet are respectively matched with a dovetail groove straight edge of the bottom surface of the fixing support 1.2.6-3 and a central guide rail straight edge of the fixing part 1.2.6-3 so as to prevent the locking screw from directly contacting the central guide rail 4 to cause damage, and meanwhile, the gasket 1.2.6-1 can increase the friction force between the fixing support 1.2.6-3 and the central guide rail 4; the locking screw 1.2.6-2 is an inner hexagonal screw, the thread of the locking screw is matched with the thread on the fixed support 1.2.6-3, the end face of the thread is in matched contact with the surface of the gasket 1.2.6-1, and the locking screw is used for locking the driving end 1.2 of the high-precision roller lower driving mechanism; the structure of the fixed support 1.2.6-3 is L-shaped, the L-shaped bottom surface is provided with a single dovetail groove, shoulder threaded holes are formed in the parallel surface of the straight edge of the single dovetail groove and communicated with the straight edge of the single dovetail groove, the locking screws 1.2.6-2 are connected with the shoulder threaded holes in the fixed bracket 1.2.6-3, the locking device is used for locking a driving end 1.2 of a high-precision roller lower driving mechanism, a gasket is installed at the straight edge of a single dovetail groove in a matched mode, the locking effect is achieved, the dovetail edge of the bottom surface of a fixing support 1.2.6-3 can be matched with the dovetail surface of a central guide rail 4 on a platen 3, two parallel grooves which are symmetrical to the central surface are formed in a 1.2.6-3L-shaped vertical surface of the fixing support, threaded holes are formed in the grooves, the grooves are connected with sliding blocks on linear guide rail assemblies 1.2.2-2, a rectangular through hole is formed in the middle of the 1.2.6-3L-shaped vertical surface of the fixing support, and a speed reducing motor assembly 1.2.5 passes through the rectangular through hole; the cylinder support 1.2.6-4 is in an L-shaped plate shape, wherein 3 shoulder unthreaded holes are formed in one side edge and used for installing screws, so that the cylinder support 1.2.6-4 is connected to the fixed support 1.2.6-3L in a matching mode, and shoulder unthreaded holes are formed in the lower surface of the cylinder support 1.2.6-4 and used for installing screws, so that the bottom of the cylinder 1.2.6-5 is connected to the upper surface of the cylinder support 1.2.6-4; the air cylinder 1.2.6-5 is a double-acting thin air cylinder, the air cylinder body is square, shoulder holes and threaded holes are formed in the West circumference of the upper surface and the lower surface of the air cylinder body, air inlet and outlet holes and a magnetic switch mounting groove are formed in the side surface of the air cylinder body, the air inlet and outlet holes are matched with threads of the pneumatic throttle valve 1.2.6-6, a magnetic switch is arranged in the magnetic switch mounting groove and used for sensing and detecting the position of a piston, a magnetic ring is arranged at the position of the piston of the air cylinder 1.2.6-5, an external thread is formed in the head of a piston rod, the bottom surface of the air cylinder 1.2.6-5 is matched with the upper surface of an air cylinder support 1.2.6-4, the air cylinder 1.2.6-5 is connected to the air cylinder support 1.2.6-4 through a screw, and the external thread at the head of the air cylinder 1.2.6-5 is matched with a threaded hole of an air cylinder support head 1.2.6-7; the pneumatic throttle valve 1.2.6-6 is provided with an external thread mounting head, a quick-change type air pipe interface and a knob for adjusting the air flow, the external thread mounting head is in threaded connection with an air inlet and an air outlet of the cylinder 1.2.6-5, the air pipe interface is connected with an air pipe, and the knob for adjusting the pneumatic throttle valve 1.2.6-6 can control the air flow of the pneumatic throttle valve so as to control the lifting speed of the piston of the cylinder 1.2.6-5; the cylinder support head 1.2.6-7 is cylindrical, one end face of the cylinder support head is a plane and is in contact fit with the end face of the adjusting bolt 1.2.2-7 to bear the gravity of the movable part of the roller mechanism 1.2.2 and other objects connected to the movable part of the roller mechanism, and the other end face of the cylinder support head 1.2.6-7 is provided with a threaded blind hole which is in threaded connection and fit with the head part of the piston rod of the cylinder 1.2.6-5; the scale 1.2.6-8 is rectangular plate-shaped, a scale line for indicating distance and two countersunk holes are arranged on the surface of one side, and the scale 1.2.6-8 is arranged in grooves on two side surfaces of the fixed support 1.2.6-3 through the countersunk holes.
The driven end 1.1 of the high-precision roller lower driving mechanism comprises a roller mechanism measuring part 1.1.1, a roller mechanism movable part 1.1.2, a swinging pressing wheel mechanism 1.1.3, a cam guider 1.1-1, a photoelectric encoder part 1.1.5 and a roller mechanism fixing part 1.1.6, wherein the roller mechanism measuring part 1.1.1 is identical to the roller mechanism measuring part 1.2.1 at the driving end of the high-precision roller lower driving mechanism in structure; the structure of the roller mechanism movable part 1.1.2 is the same as that of the roller mechanism movable part 1.2.2 at the driving end of the high-precision roller lower driving mechanism; the swing pinch roller mechanism 1.1.3 and the swing pinch roller mechanism 1.2.3 at the driving end of the high-precision roller lower driving mechanism are symmetrical in structure and opposite in swing direction, and the cam guider 1.1-1 is installed on the roller mechanism fixing part 1.1.6 and matched with the shaft end face of the workpiece 2.
The photoelectric encoder part 1.1.5 of the invention is composed of a belt wheel 1.1.5-1, an encoder fixing plate 1.1.5-2, an encoder bracket 1.1.5-3, a shaft coupling 1.1.5-4, a photoelectric encoder 1.1.5-5, a small shaft 1.1.5-6, a bearing 1.1.5-7, an inner shaft sleeve 1.1.5-8, an outer shaft sleeve 1.5-9 and a lock nut 1.1.5-10, wherein the encoder bracket 1.1.5-3 of the belt wheel 1.1.5-1 is a rectangular structure, the middle part is provided with a square opening, one end surface is provided with a light hole and a threaded hole, the other end is provided with a shoulder light hole and a threaded hole which are respectively connected with the photoelectric encoder 1.1.5-5 and the fixing plate 1.1.5-2, the bearing 1.1.5-7 is arranged in the shoulder light hole of the encoder bracket 1.1.1.5-3, the bearing 1.1.5-7 is matched with the inner and outer rings of the shaft sleeve 1.5-1.5 and the end surface of the shaft sleeve 1.9-9, inner rings of bearings 1.1.5-7 are matched with outer circles of small shafts 1.1.5-6, the small shafts 1.1.5-6 are stepped shafts with a plurality of shoulders, the shaft surface of one end of each of the small shafts 1.1.5-6 is provided with a key groove, threads are arranged on adjacent shaft diameters, the shaft diameters of the small shafts 1.1.5-6 with the key grooves are matched and connected with belt wheels 1.1.5-1, the small shafts 1.1.5-6 transmit torque by virtue of keys, shaft diameters of the small shafts 1.1.5-6 with the threads are provided with locking nuts 1.1.5-10, the end surfaces of the locking nuts 1.1.5-10 are matched with the end surfaces of inner shaft sleeves 1.1.5-8, the shaft diameters of the small shafts 1.1.5-6 without the key grooves are connected with inner holes of couplings 1.1.5-4, and the other sides of the inner holes 1.1.5-4 of the couplings are matched and connected with the extending shaft diameters of photoelectric encoders 1.1.1.1.5-5.
The high-precision downward-driving type roller driving mechanism comprises a high-precision roller downward-driving mechanism driven end and a high-precision roller downward-driving mechanism driving end, wherein the driving end is provided with a servo motor and can drive a workpiece to rotate, and the driven end is provided with a photoelectric encoder and can record the rotation angle of the workpiece.
The movable part of the roller mechanism in the high-precision roller lower driving mechanism can move up and down along the guide rail.
The height position of the movable part of the roller mechanism can be adjusted so as to adapt to workpieces with different diameters.
The high-precision roller lower driving mechanism is provided with a pointer and a scale, and the height position of the roller can be read through the pointer and the scale.
The high-precision roller lower driving mechanism has a shaft end positioning function, a cam guider with a fixed axial position is arranged at the high-precision roller lower driving mechanism (driven end), and a shaft end positioning mechanism with a positioning wheel capable of horizontally moving is arranged at the high-precision roller lower driving mechanism (driving end).
The crossed roller bearings of the roller mechanism are symmetrical to the central plane of the fixed plate of the roller mechanism, two crossed roller bearings arranged on the movable part of the roller mechanism and the cam guide are arranged in an inverted triangle, the toothed belt is single-sided with internal teeth, the internal teeth of the toothed belt are matched with two toothed belt wheels connected to the outer rings of the crossed roller bearings and a toothed belt wheel connected with a motor, the external surface of the toothed belt is matched with the outer ring of the bearing of the cam guide, when the toothed belt wheel connected with the motor rotates, the toothed belt connected with the external diameter in a toothed shape matched with the external diameter of the toothed belt drives the toothed belt wheel connected with the outer rings of the crossed roller bearings to rotate, and the corresponding outer rings of the crossed roller bearings rotate.
The rotary roller arranged on the movable part of the roller mechanism has no secondary assembly, the high-precision crossed roller bearing is adopted to replace the traditional roller, and the rotation precision of the outer ring of the bearing is more than or equal to 0.003 mm. The outer ring of the high-precision crossed roller bearing is provided with circular shoulder unthreaded holes which are uniformly distributed, and the inner ring is provided with threaded through holes which are uniformly distributed. The bearing outer ring rotates under the action of a belt wheel arranged on the bearing outer ring. Therefore, the repeated measurement precision of 10 times of measurement of the workpiece can be ensured to be less than or equal to 0.005 mm.
The roller mechanism fixing seat is provided with a dovetail groove, and when the rollers of the roller mechanism move along the horizontal direction of the dovetail groove at intervals and are locked and installed, the centers of the two pairs of rollers are coplanar.
The roller mechanism has a radial pressing function so as to increase the friction force between the roller and the outer surface of the workpiece, and is realized by a pressing wheel mechanism. The left and right pinch rollers are bilaterally symmetrical components, and the air cylinder for realizing the pressing function is a rotary swing air cylinder. The cylinder piston shaft can rotate 90 degrees. The lift mechanism can be divided into a rotary lift and a compression lift. The pressing wheel mechanism is provided with an oil buffer for accurately positioning the rotation angle of the cylinder.

Claims (9)

1. The utility model provides a drive formula roller actuating mechanism under high accuracy which characterized in that: comprises a driven end of a high-precision roller lower driving mechanism and a driving end of the high-precision roller lower driving mechanism, wherein the lower surfaces of the driven end of the high-precision roller lower driving mechanism and the driving end of the high-precision roller lower driving mechanism are planes, the center of the upper surface of the workbench is provided with a central guide rail, the section of the central guide rail is in a single dovetail shape, the driven end of the high-precision roller lower driving mechanism and the fixed bracket of the driving end of the high-precision roller lower driving mechanism are provided with a single dovetail groove structure, which is matched with the dovetail inclined plane of the central guide rail and can adjust the installation position of the dovetail inclined plane on the central guide rail, the high-precision roller lower driving mechanism driving end and the high-precision roller lower driving mechanism driven end are respectively positioned at two ends of a circular workpiece, and the excircle surfaces of the two ends of the circular workpiece are tangent to the excircle of a high-precision crossed roller bearing in the movable part of the roller driving mechanism; one end face of a workpiece is tangent to the surface of a bearing outer ring on a shaft end positioning mechanism on the driving end of a high-precision roller lower driving mechanism, the other end face of the workpiece is tangent to the surface of an excircle of a cam guider on the driven end of the high-precision roller lower driving mechanism, the excircle of a swing pressing wheel mechanism and the excircle of the cam guider of the swing pressing wheel mechanism in the high-precision lower driving type roller driving mechanism press the outer surfaces of two ends of the workpiece above the workpiece to increase the friction force between the workpiece and the roller mechanism, a motor in the driving end of the high-precision roller lower driving mechanism drives an outer ring of a high-precision crossed roller bearing to rotate through a belt wheel and a tooth profile, the outer ring of the high-precision crossed roller bearing drives the workpiece to rotate through the friction force, and the outer ring of the high-precision crossed roller bearing in the driven end of the high-precision roller lower driving mechanism is driven to rotate under the action of the friction force, the outer ring of the high-precision crossed roller bearing drives a photoelectric encoder in a photoelectric encoder part to rotate through a toothed belt wheel and a toothed belt transmission mechanism which are connected with the outer ring of the high-precision crossed roller bearing, so that the photoelectric encoder records the rotation angle value of a workpiece; a roller mechanism measuring part in the high-precision downward-driving roller driving mechanism and a measuring tappet rod arranged on the roller mechanism measuring part are contacted with the surfaces of two ends of a workpiece so as to detect radial runout values of the two ends of the workpiece;
the drive end of the high-precision roller lower driving mechanism comprises: the roller mechanism measuring part, the roller mechanism movable part, the swing pressing wheel mechanism, the shaft end positioning mechanism, the speed reducing motor part and the roller mechanism fixed part are arranged, wherein the roller mechanism fixed part is provided with a single dovetail groove structure and used for locking with a dovetail guide rail on a workbench, the roller mechanism fixed part is matched and connected with a slide block on a linear guide rail component in the roller mechanism movable part through screws, the speed reducing motor part is provided with a fixed plate which is matched and connected with a fixed bracket on the roller mechanism fixed part, the speed reducing motor rotates to drive a high-precision roller on the roller mechanism movable part to rotate, the fixed plate is provided with a long hole, the mounting position of the speed reducing motor part on the fixed bracket can be adjusted, the end surface of a positioning cylinder bracket on the shaft end positioning mechanism is matched with the fixed bracket and is connected by screws, the pressing wheel mechanism is provided with a corner cylinder fixing bracket, the end face of the device is matched with a fixed support and is connected with the fixed support through screws, a movable part of a roller mechanism is provided with a linear guide rail assembly, a guide rail on the linear guide rail assembly is matched with the side face of a fixed plate of the roller mechanism and is connected with the fixed support through screws, cylinders are arranged on two sides of the fixed part of the roller mechanism and can push the movable part of the roller mechanism to vertically lift, a measuring part of the roller mechanism is provided with a connecting frame and is connected with a cylinder adjusting connecting block in the movable part of the roller mechanism through screws, and a measuring tappet is arranged on the measuring part of the roller mechanism.
2. A high accuracy lower drive roller drive mechanism as defined in claim 1, wherein: the roller mechanism measuring part comprises a locking screw, a protective plate, a bearing end cover, an angular contact ball bearing, a rotating shaft, a sensor fixing block, an extension spring, a sliding plate, a lever, a jackscrew, a tappet frame, a measuring tappet, a measuring support, a connecting frame, an upper spring pull rod, a lower spring pull rod and a shaft sleeve, wherein the roller mechanism measuring part is connected with the fixing support in the roller mechanism fixing part through the connecting frame; the protection plate is an L-shaped thin-wall plate, the surface of the protection plate is provided with a counter bore, and a screw is matched with the counter bore and arranged on two sides of the measuring bracket to protect the sensor; the bearing end cover is square, an annular boss is arranged on the end face of the bearing end cover, four unthreaded holes are uniformly distributed on the periphery of the square, the bearing end cover penetrates through the four unthreaded holes through screws to be tightly connected with threaded holes in the side face of the measuring support, and the annular boss on the end face of the bearing end cover is matched with an outer ring of the angular contact ball bearing to adjust the axial clearance of the angular contact ball bearing; the inner sides of the bearing outer rings of the angular contact ball bearings are provided with oblique angles, the oblique angles are used in pairs and are installed face to face, the angular contact ball bearings can bear axial and radial loads, the outer circles of the bearing outer rings are matched with the unthreaded holes in the measuring support, the end faces, without the oblique angles, of the bearing outer rings are matched with the end faces of the annular bosses of the bearing end covers, the bearing outer rings are free from the oblique angle end faces, the shaft diameters of the bearing inner rings of the two angular contact ball bearings are matched with the outer circles of the shaft diameters of the rotating shafts, and the end face of one bearing inner ring is respectively matched with the end face of the shaft sleeve and the end face of the shoulder of the rotating shaft; the end surface of the other bearing inner ring is respectively matched with the end surface of the shaft sleeve and the side surface of the spring retainer ring, the rotating shaft is in the shape of a circular shoulder shaft with a circular retaining edge, and a circular groove is arranged at the shaft diameter position far away from the circular retaining edge and used for installing the spring retainer ring; the sensor is in a stepped cylinder shape and comprises a fixed stepped cylinder and a sliding measuring rod, the sliding measuring rod is a cylindrical rod and can freely slide in the center of the stepped cylinder, the head of the measuring rod is provided with a spherical measuring head, the measuring head is detachable, the sensor measures the displacement of the measuring head in a differential transformation mode, the measuring precision is less than or equal to 0.001mm, the side surface of the sensor fixing block is in an L shape, a short L-shaped part is provided with an optical hole, a long L-shaped part is provided with an optical hole, the middle section of the optical hole is provided with a rectangular opening, the optical hole is divided into two semicircles by the rectangular opening, the end surface of the long L-shaped part of the sensor fixing block is provided with an optical hole, the optical hole is communicated with one side surface of the rectangular opening, the other side surface of the square opening is provided with a threaded blind hole, the threaded hole is coaxial with the optical hole of the end surface of the long L-shaped part, and a locking screw penetrates through the optical hole of the end surface of the L-shaped part, the screw thread part on the shaft lever of the locking screw is matched and connected with the blind hole of the screw thread on the fixed block of the sensor, the shape of the extension spring is a spring with a cylindrical spiral extension function, hooks are arranged at two ends of the extension spring, the hooks at the two ends are respectively connected with the unthreaded holes of the upper spring pull rod and the lower spring pull rod and are used for applying spring force to one end of the lever, so that the lever can rotate around the axis of the rotating shaft; the measuring support is rectangular, a rectangular groove and a unthreaded hole are formed in the upper end of the measuring support, threaded holes are formed in the periphery of the measuring support, an angular contact ball bearing is installed in the unthreaded hole of the measuring support, an inner ring of the angular contact ball bearing is matched with the excircle of two ends of a rotating shaft, the diameter of a middle shaft of the rotating shaft matched with the inner ring of the angular contact ball bearing is installed on a lever, the lever is Z-shaped, the front end and the rear end of the lever are respectively provided with a threaded hole, the middle of the lever is provided with the unthreaded hole, the upper end of the unthreaded hole is provided with a threaded hole, a jackscrew is installed in the threaded hole in the upper end of the middle unthreaded hole and used for locking the rotating shaft and the lever, and an upper spring pull rod of a sliding plate and a tension spring is installed in the threaded hole in the rear end of the lever; the lower end of the sliding plate is cylindrical, the lower surface of the cylindrical sliding plate is in contact with the head of a sensor arranged on a sensor fixing block under the action of an extension spring, and the front end of the lever is connected with the tappet frame through a threaded hole; the side surface of the tappet rod frame is provided with a step long hole, the upper end of the step long hole is provided with an unthreaded hole and a threaded hole, the fixed position of the tappet rod frame on the lever can be adjusted through the step long hole tappet rod frame, a measuring tappet rod is installed at the unthreaded hole on the tappet rod frame, a jackscrew is arranged on the threaded hole at the unthreaded hole, the jackscrew is provided with a bolt with an external thread, and one end surface of the jackscrew is provided with an inner hexagonal groove which is used for locking the measuring tappet rod; the measuring tappet is in a round rod shape and made of hard alloy so as to ensure the high wear resistance and high rigidity of the measuring tappet; it is used as a measuring head installed on the measuring part of the roller mechanism and is contacted with the outer surface of the measured object in real time.
3. A high precision down-drive roller drive mechanism as claimed in claim 1, wherein: the movable part of the roller mechanism comprises a pointer, a linear guide rail assembly, a toothed belt, a cam guider, an air cylinder adjusting connecting block, a high-precision crossed roller bearing, an adjusting bolt, a protective cover, a belt wheel, a bearing, a roller fixing shaft and a roller mechanism fixing plate, wherein the pointer is L-shaped, one right-angle side is provided with 2 90-degree counter bores, the other right-angle side is provided with a sharp corner, the pointer is mounted on the side surface of the air cylinder adjusting connecting block through a screw to indicate the height position of the movable part of the roller mechanism, the linear guide rail assembly comprises a linear guide rail and a sliding block, shoulder unthreaded holes are uniformly distributed on the upper surface of the linear guide rail, V-shaped grooves are arranged on the two side surfaces of the linear guide rail, the sliding block is square, sliding balls are arranged on the upper surface of the sliding block, the sliding block is matched with the grooves on the two V-shaped side surfaces of the linear guide rail through the sliding balls, the bottom surface of a linear guide rail in the linear guide rail assembly is matched with two parallel grooves on a fixed plate of the roller mechanism and is connected to a threaded hole in the groove by adopting a screw, and the upper surface of a sliding block in the linear guide rail assembly is matched with the groove on the side surface and is connected to the threaded hole in the groove by adopting a screw; the shape of the toothed belt is circular, the toothed belt is made of non-metallic materials and is flexible, the width of the toothed belt is slightly smaller than that of the belt wheel, the teeth on one side of the toothed belt are the same as those of the belt wheel, the inner teeth of the toothed belt are meshed with the outer circle of the belt wheel in a tooth form, and the outer circle surface of the toothed belt is matched with the outer circle of the head of the cam guider in a matching manner; the cam guider is composed of an installation rod and a rotating head, the installation rod is a cylindrical shaft rod, fine threads are arranged at the position of the shaft rod, the threads of the shaft rod are connected and matched with threaded holes in the side face of a roller mechanism fixing plate, the axis of the roller mechanism fixing plate is perpendicular to the installation surface of the roller mechanism fixing plate, the rotating head of the cam guider is a needle bearing, an inner ring is fixed on the shaft rod, an outer ring can rotate, an inner hexagonal hole is formed in the center of the end face of the rotating head, and the inner hexagonal hole is used for screwing a threaded rod of the cam guider during installation; the cylinder adjusting connecting block is cross-shaped, a square boss is arranged on one end face of the cylinder adjusting connecting block and is installed in square grooves of two vertical faces of a roller mechanism fixing plate, square flanges are arranged on two sides of the boss of the cylinder adjusting connecting block and are provided with unthreaded holes, the square flanges are matched with the two vertical faces of the roller mechanism fixing plate, screws penetrate through the square flanges and are provided with the unthreaded holes to be connected with threads on the two vertical faces of the roller mechanism fixing plate, a threaded hole is formed in the horizontal plane of the cylinder adjusting connecting block, and threaded holes and key grooves are formed in two side faces of the cylinder adjusting connecting block and are used for installing a pinch roller mechanism; the inner ring of the crossed roller bearing is provided with threaded through holes which are uniformly distributed on the circumference, the outer circle of the crossed roller bearing is provided with stepped through holes which are uniformly distributed on the circumference, the middle rollers are distributed in a crossed structure, the rotating precision of the outer ring of the crossed roller bearing is more than P4, so that the crossed roller bearing is used as a roller, the high-precision requirement of the roller is ensured, the inner ring of the crossed roller bearing is connected with a roller fixing shaft, the outer ring of the crossed roller bearing is connected with a belt wheel, and the height position of the high-precision crossed roller bearing can be manually observed by a scale position indicated on a scale by a pointer; the adjusting bolt is of a round rod type and is provided with a fine full thread, one side end face of the adjusting bolt is provided with an inner hexagonal groove, the inner hexagonal groove is arranged in a threaded hole in the horizontal plane of the air cylinder adjusting connecting block, and the height position of the high-precision crossed roller bearing arranged on the movable part of the roller mechanism during lifting is changed by adjusting the screwing length of the adjusting bolt and the air cylinder adjusting connecting block; the protective cover is formed by bending a metal plate, the upper part of the protective cover is provided with a V-shaped opening, the protective cover is arranged on the side surface of the roller mechanism fixing plate and is used for protecting a toothed belt and a belt wheel; the belt wheel is composed of a toothed wheel body and a flange, the flange is annular and is installed on one side of the toothed wheel body, the toothed wheel body is in the shape of a circular bead cylinder, the side surface of the toothed wheel body is provided with circular bead unthreaded holes and threaded through holes which are uniformly distributed on the circumference, an inner hole of the toothed wheel body is a circular bead unthreaded hole, a bearing is installed in a large unthreaded hole, the maximum outer diameter of the large unthreaded hole is smaller than the diameter of the outer circle of the bearing, the inner diameter of the toothed belt wheel is provided with a stepped unthreaded hole, the bearing is installed in the stepped unthreaded hole, the outer circle of the toothed wheel body is provided with trapezoidal teeth which are uniformly distributed on the circumference, and the trapezoidal teeth are meshed with the inner teeth of the toothed belt; the bearing is a deep groove ball bearing, the outer ring of the bearing is matched with the inner hole of the belt wheel, and the inner ring of the bearing is matched with the shaft diameter of the roller fixing shaft; the roller fixing shaft is in a cylindrical stepped shaft shape, center holes with threads are formed in the centers of two ends of the shaft, threaded holes are circumferentially and uniformly distributed in the end face with a large shaft diameter, shoulder unthreaded holes are circumferentially and uniformly distributed in the end face with the large shaft diameter, the roller fixing shaft can be connected to a roller mechanism fixing plate through screws, 2 roller fixing shaft large shaft diameter end faces are matched with the bottom faces of blind holes symmetrically arranged on the side face of the roller mechanism fixing plate, and the outer circle surface of the large shaft diameter of the roller fixing shaft is matched with the blind holes symmetrically arranged on the side face of the roller mechanism fixing plate; the roller mechanism fixing plate is in a rectangular plate shape, the middle of the lower end of the roller mechanism fixing plate is provided with a square hole, and the square hole is communicated with the lower edge; the two sides of the square hole are provided with four threaded holes for mounting a fixing plate arranged on the speed reducing motor part, the upper end of the roller mechanism fixing plate is provided with a v-shaped groove and a threaded hole, the threaded hole is internally provided with a cam guider, the outer circle surface of the head part of the cam guider is matched with the shaft end surface of a workpiece and is used for axially positioning the workpiece, and one side surface of the roller mechanism fixing plate is provided with a parallel groove and a stepped unthreaded hole for mounting a guide rail of a linear guide rail assembly; the middle part of the roller mechanism fixing plate is provided with a key groove for mounting a rectangular key; the upper part of the other side surface of the fixed plate of the roller mechanism is provided with two centrosymmetric step holes, unthreaded holes are uniformly distributed on the periphery of the two step holes, the step holes are matched and connected with a roller fixed shaft, two vertical surfaces of the fixed plate of the roller mechanism are provided with square grooves and threaded holes, an air cylinder adjusting connecting block is matched and connected with the square grooves, crossed roller bearings are symmetrically arranged on the central surface of the fixed plate of the roller mechanism, two crossed roller bearings arranged on the movable part of the roller mechanism and a cam guide are arranged in an inverted triangle shape, a toothed belt is in single-side inner teeth, the inner teeth of the toothed belt are matched with the teeth of two belt wheels connected on the outer ring of the crossed roller bearings and a belt wheel connected with a motor, the outer surface of the toothed belt is matched with the bearing outer ring of the cam guide, when the belt wheel connected with the motor rotates, the toothed belt matched and connected with the outer diameter of the teeth of the belt wheel drives the belt wheel connected with the outer ring of the crossed roller bearings to rotate, the corresponding crossed roller bearing outer race rotates.
4. A high precision down-drive roller drive mechanism as claimed in claim 1, wherein: the swing pinch roller mechanism comprises a corner cylinder, a rectangular key, a corner cylinder fixing frame, a cam guider, a lengthened guide rod, an oil pressure buffer, a high-precision crossed roller bearing, an oil pressure buffer bracket, a swing rod and a guide plate, wherein a piston rod of the corner cylinder can rotate and lift at an angle of 90 degrees, and the end part of the piston rod is provided with a square section and a threaded inner hole; the lengthened guide rod is cylindrical and hollow and is connected with the end part of a piston rod of the corner cylinder, and the corner cylinder is used for adjusting the strokes of the swing rod and the cam guider arranged on the corner cylinder; the swing rod is L-shaped, one end of the swing rod is provided with a stepped unthreaded hole, the stepped unthreaded hole is used for being connected with a piston rod of an air cylinder, the other end of the swing rod is provided with a large chamfer, the side surface of the swing rod is provided with a threaded through hole, the side surface of the swing rod is provided with a rectangular groove, the lengthened guide rod is of a T-shaped structure, a T-shaped surface of the lengthened guide rod is arranged in the rectangular groove of the swing rod, the cam guide is used as a pressing wheel of the swing pressing wheel mechanism, a threaded hole of the cam guide is connected with threads on a guide rod of the cam guide, and the cam guide can rotate and lift by 90 degrees along with the swing rod; the corner cylinder fixing frame is of a T-shaped structure, a large unthreaded hole is formed in the center of a long edge of the T-shaped structure, a piston rod of a corner cylinder can penetrate through the large unthreaded hole, 4 small unthreaded holes are uniformly distributed around the large unthreaded hole, the long edge of the T-shaped structure of the corner cylinder fixing frame is connected to the top of the corner cylinder, and the top surface of the T-shaped structure at the other end of the corner cylinder fixing frame is connected to the cylinder adjusting connecting block; the hydraulic buffer is arranged on a hydraulic buffer support, the hydraulic buffer support is connected to the corner cylinder fixing frame, and when a piston rod of the corner cylinder rotates for 90 degrees, the guide plate and the piston head of the hydraulic buffer are in contact buffering.
5. A high precision down-drive roller drive mechanism as claimed in claim 1, wherein: the shaft end positioning mechanism comprises a pneumatic throttle valve, a rectangular key, a jackscrew, a bearing, a positioning bearing fixing shaft, a positioning wheel bracket, a double-shaft cylinder and a positioning cylinder bracket, wherein the pneumatic throttle valve is arranged on a threaded hole on the side surface of the double-shaft cylinder and is connected with the threaded hole by adopting a conical thread so as to adjust the movement speed of a piston of the double-shaft cylinder; the positioning wheel support is of a right-angle L shape, and is provided with a long short side, a long side provided with a threaded hole, the upper surface of the long side is connected with the double-shaft cylinder, the other right-angle side provided with a unthreaded hole, and the positioning bearing fixing shaft is arranged in the threaded hole of the long side of the positioning wheel support; the positioning air cylinder support is of a right-angle L shape and is provided with long and short edges, the long edges are provided with threaded holes, the double-shaft air cylinder is installed on the long edges of the positioning air cylinder support, and the short edges of the positioning air cylinder support are connected with the side face of the roller mechanism fixing plate in a matched mode.
6. A high precision down-drive roller drive mechanism as claimed in claim 1, wherein: the gear motor portion dress include motor, reduction gear, fixed plate, band pulley, wherein the fixed plate is rectangle, and its side has two slot holes and screw hole, and central point puts and has the unthreaded hole, and the unthreaded hole cooperates with reduction gear axle side end flange, and the fixed plate passes through the slot hole on the fixed plate to be connected with the gyro wheel mechanism fixed plate, when adjusting the mounted position of fixed plate on gyro wheel mechanism fixed plate, can adjust the elasticity with band pulley complex toothed belt, the motor is connected with reduction gear end flange, the band pulley is connected with reduction gear front end axle footpath.
7. A high precision down-drive roller drive mechanism as claimed in claim 1, wherein: the roller mechanism fixing part comprises a gasket, a locking screw, a fixing support, a cylinder, a pneumatic throttle valve, a cylinder supporting head and a scale, wherein the gasket is a rectangular copper sheet, two side surfaces of the gasket are respectively matched with a dovetail groove straight edge and a central guide rail straight edge of the bottom surface of the fixing support of the fixing part, so that the situation that the locking screw directly contacts the central guide rail (4) to cause damage is prevented, and meanwhile, the gasket can increase the friction force between the fixing support and the central guide rail (4); the locking screw is a socket head cap screw, the thread of the locking screw is matched with the thread on the fixing support, the end face of the thread is in matched contact with the surface of the gasket, and the locking screw is used for locking the driving end of the high-precision roller lower driving mechanism; the structure of the fixing support is L-shaped, a single dovetail groove is arranged on the bottom surface of the L-shaped, a shoulder threaded hole is formed in a surface parallel to a straight edge of the single dovetail groove and communicated with the straight edge of the single dovetail groove, a locking screw is connected with the shoulder threaded hole in the fixing support and used for locking the driving end of the high-precision roller lower driving mechanism, the straight edge of the single dovetail groove is matched with a mounting gasket to play a locking role, the dovetail edge of the bottom surface of the fixing support can be matched with the dovetail surface of a central guide rail (4) on the bedplate, two parallel grooves symmetrical to the central surface are formed in an L-shaped vertical surface of the fixing support, threaded holes are formed in the grooves, the grooves are connected with a sliding block on a linear guide rail assembly, a rectangular through hole is formed in the middle of the L-shaped vertical surface of the fixing support, and a speed reducing motor is installed through the rectangular through hole; the cylinder bracket is in an L-shaped plate shape, wherein 3 shoulder unthreaded holes are formed in one side edge of the cylinder bracket and used for mounting screws, so that the cylinder bracket is connected to the fixed bracket in a matching manner, and shoulder unthreaded holes are formed in the lower surface of the cylinder bracket and used for mounting screws, so that the bottom of the cylinder is connected to the upper surface of the cylinder bracket; the pneumatic throttle valve is characterized in that the air cylinder is a double-acting thin air cylinder, the cylinder body is square, shoulder holes and threaded holes are formed in the west periphery of the upper surface and the west periphery of the lower surface of the cylinder body, air inlet and outlet holes and a magnetic switch mounting groove are formed in the side surface of the cylinder body, the air inlet and outlet holes are matched with threads of the pneumatic throttle valve, a magnetic switch is arranged in the magnetic switch mounting groove and used for sensing the position of a detection piston, a magnetic ring is arranged at the position of a piston of the air cylinder, an external thread is formed in the head of a piston rod, the bottom surface of the air cylinder is matched with the upper surface of an air cylinder support, the air cylinder is connected to the air cylinder support through a screw, and the external thread at the head of a piston rod of the air cylinder is matched with a threaded hole of an air cylinder support head; the pneumatic throttling valve is provided with an external thread mounting head, a quick-change type air pipe interface and a knob for adjusting the air flow, the external thread mounting head is in threaded connection with an air inlet and an air outlet of the cylinder, the air pipe interface is connected with an air pipe, and the knob for adjusting the pneumatic throttling valve can control the air flow of the pneumatic throttling valve so as to control the lifting speed of a piston of the cylinder; the cylinder support head is cylindrical, one end face of the cylinder support head is a plane and is in contact fit with the end face of the adjusting bolt to bear the gravity of the movable part of the roller mechanism and other objects connected to the roller mechanism, and the other end face of the cylinder support head is provided with a threaded blind hole which is in threaded connection and fit with the head part of the piston rod of the cylinder; the scale is rectangular plate-shaped, a scribed line for indicating distance and two countersunk holes are formed in the surface of one side of the scale, and the scale is arranged in grooves in two side faces of the fixed support through the countersunk holes.
8. A high precision down-drive roller drive mechanism as claimed in claim 1, wherein: the driven end of the high-precision roller lower driving mechanism comprises a roller mechanism measuring part, a roller mechanism movable part, a swinging pressing wheel mechanism, a cam guider, a photoelectric encoder part and a roller mechanism fixing part, wherein the roller mechanism measuring part is the same as the roller mechanism measuring part at the driving end of the high-precision roller lower driving mechanism in structure; the movable part of the roller mechanism is arranged to have the same structure as the movable part of the roller mechanism at the driving end of the high-precision roller lower driving mechanism; the swing pinch roller mechanism and the swing pinch roller mechanism at the driving end of the high-precision roller lower driving mechanism are symmetrical in structure, the swing directions of the swing pinch roller mechanism are opposite, and the cam guider is installed on the fixing part of the roller mechanism and matched with the end face of the shaft of a workpiece.
9. A high accuracy underdrive roller drive mechanism as defined in claim 8, wherein: the photoelectric encoder part is composed of a belt wheel, an encoder fixing plate, an encoder bracket, a coupling, a photoelectric encoder, a small shaft, a bearing, an inner shaft sleeve, an outer shaft sleeve and a locking nut, wherein the encoder bracket of the belt wheel is of a rectangular structure, the middle of the encoder bracket is provided with a square opening, one end face of the encoder bracket is provided with a unthreaded hole and a threaded hole, the other end face of the encoder bracket is provided with a shoulder unthreaded hole and a threaded hole which are respectively connected with the photoelectric encoder and the encoder fixing plate, the bearing is arranged in the shoulder unthreaded hole of the encoder bracket, the end faces of the inner ring and the outer ring of the bearing are matched with the end faces of the inner shaft sleeve and the outer shaft sleeve, the inner ring of the bearing is matched with the outer circle of the small shaft, the small shaft is a stepped shaft with a plurality of shoulders, the surface of one end shaft of the small shaft is provided with a key groove, the adjacent shaft diameter is provided with a thread, the shaft diameter of the small shaft with the key groove is matched and connected with the belt wheel, the torque is transmitted by the key, the small shaft diameter of the small shaft is provided with the locking nut, the end face of the locking nut is matched with the end face of the inner shaft sleeve, the shaft diameter of the small shaft without the key groove is connected with an inner hole of the coupling, and the inner hole of the other side of the coupling is matched and connected with the extending shaft diameter of the photoelectric encoder.
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