CN220699058U

CN220699058U - Piston rod outer surface precision machining device

Info

Publication number: CN220699058U
Application number: CN202322251293.8U
Authority: CN
Inventors: 张月平; 陈茂; 蒋纪
Original assignee: Luzhou Yongwei Hydraulic Part Co ltd
Current assignee: Luzhou Yongwei Hydraulic Part Co ltd
Priority date: 2023-08-22
Filing date: 2023-08-22
Publication date: 2024-04-02
Anticipated expiration: 2033-08-22

Abstract

The utility model relates to the technical field of piston rod machining, and belongs to a piston rod outer surface precision machining device, which comprises a box body, wherein a first mounting frame is fixedly arranged at the bottom end of the box body; four sliding rails are fixedly arranged on the first mounting frame, and every two sliding rails are in a group; wherein two groups of clamping assemblies are arranged on one group of sliding rails on the rear side; a first locating cone is rotationally arranged on one group of clamping assemblies, and a second locating cone is rotationally arranged on the other group of clamping assemblies; the other group of sliding rails are provided with a first sliding plate in a sliding manner, and a polishing assembly is arranged on the first sliding plate. The clamping assembly moves in opposite directions to rapidly and accurately position and clamp the workpiece through the cooperation of the first screw nut and the first screw; the first sliding plate drives the grinding wheel to reciprocate left and right through the matching of the rack and the gear, and the surface of the workpiece is processed; the second sliding plate drives the grinding wheel to move radially through the cooperation of the nut and the second screw rod, so that the grinding wheel is suitable for workpieces with various sizes.

Description

Piston rod outer surface precision machining device

Technical Field

The utility model belongs to the technical field of piston rod machining, and relates to a piston rod outer surface precision machining device.

Background

In the field of machining, polishing is a common machining method and is mainly used for finish machining of workpieces.

The prior art is for the chinese patent of application number CN201720203086.7, proposes an inside and outside high-efficient automatic polisher of pipe, including the frame, be equipped with the backing roller in the frame in order to support the pipe, pipe actuating mechanism can order about the pipe to roll on the backing roller, and grinding device includes interior grinding roller and outer grinding roller, interior grinding roller and outer grinding roller are respectively axial laminating in the inner wall and the outer wall of pipe. The clamping device in the device is fixed in size, cannot adapt to processing of objects with different lengths, and is low in flexibility. The polishing device cannot move, so that only one end of an object can be polished, and only a specific end head can be polished, so that the completion degree of the object is low, other processing needs to be further performed, and the production efficiency is reduced.

The patent application document of the prior art CN214292278U discloses an automobile piston rod outer surface machining device, which comprises a bottom plate, wherein a first sliding rail is fixedly arranged in the middle of the bottom plate, and a clamping device is arranged in the first sliding rail; the clamping device comprises two clamping frames, wherein the clamping frames comprise first sliding blocks, the top ends of the first sliding blocks are fixedly provided with fixing frames, the fixing frames are far away from the three side faces of the first sliding blocks, fixing screws are arranged in a penetrating mode, and one ends of the fixing screws, located in the fixing frames, are provided with arc-shaped clamping heads. The utility model discloses a polishing device for a motor vehicle, including bottom plate, fixed being provided with the first electric jar, the fixed second slide rail that is provided with in one side of bottom plate, be provided with grinding device in the second slide rail, one side of bottom plate is fixed and is provided with the backup pad, the fixed frame that is provided with of centre of backup pad, the fixed frame internal fixation of electric jar is provided with first electric jar, the second slide rail is kept away from the fixed second electric jar that is provided with of one end of backup pad. The second electric cylinder pushes the motor fixing frame to move at a constant speed in the second sliding rail through the second sliding block, and meanwhile, the motor drives the grinding wheel to rotate, so that the grinding wheel is polished at a constant speed from the surface of the connecting rod. In the device, three fixing bolts are adopted for fixing the piston rod, so that the bolt matching precision is low, and the bolts are respectively screwed down, so that the positioning precision of the whole piston rod is low; the grinding device can only move axially along the guide sleeve or the piston rod, but can not move radially, so that the machined piston rod has a single size.

Disclosure of Invention

In order to solve the problems in the background technology, the utility model provides a device for accurately machining the outer surface of a piston rod.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the device for precisely machining the outer surface of the piston rod comprises a box body, wherein a first mounting frame is fixedly arranged at the bottom end of the box body; four sliding rails are fixedly arranged on the first mounting frame, every two sliding rails are in a group, and the two groups are arranged symmetrically front and back; wherein two groups of clamping assemblies are arranged on one group of sliding rails on the rear side; the clamping assemblies of one group are rotatably provided with a first positioning cone, the clamping assemblies of the other group are rotatably provided with a second positioning cone, and the axes of the first positioning cone and the second positioning cone are positioned on the same horizontal line; a group of sliding rails on the front side are provided with a first sliding plate which moves left and right in a sliding manner, and a polishing assembly which moves back and forth is arranged on the first sliding plate.

Further, the clamping assembly comprises a first sliding plate and a first mounting plate, the first sliding plate is arranged on the left side of the rear side sliding rail in a sliding manner, the first mounting plate is fixedly arranged on the first sliding plate, and the first locating cone is rotatably arranged on the upper portion of the first mounting plate;

the clamping assembly comprises a second sliding plate and a second mounting plate, wherein the second sliding plate is arranged on the right side of the rear side sliding rail, the second mounting plate is fixedly arranged on the second sliding plate, and the second locating cone is rotatably arranged on the upper portion of the second mounting plate.

Further, one side of the second mounting plate is fixedly provided with a third motor, and the output end of the third motor is fixedly connected with the second positioning cone in a coaxial manner.

Further, a transverse second sliding groove is formed in the first mounting frame, and a first lead screw is rotatably arranged in the second sliding groove; a first motor is fixedly arranged on one side of the box body, which is close to the second chute, and the output end of the first motor is fixedly connected with a first screw rod in a coaxial manner; the bottom of first slide and second slide all is fixed to be provided with first lead screw nut, first lead screw nut and first lead screw threaded connection.

Further, the polishing assembly comprises a polishing wheel and a double-output shaft motor, and an opening is formed in the upper end of the first sliding plate; the upper end is provided with a second sliding plate in a sliding way; the double-output-shaft motor is fixedly arranged above the second sliding plate, and the grinding wheel is coaxially and fixedly arranged on one output shaft of the double-output-shaft motor;

the first sliding plate is internally provided with a groove, a second screw rod is rotatably arranged in the groove, a second screw rod nut is fixedly arranged at the bottom end of the second sliding plate, the second screw rod nut is sleeved on the second screw rod, and the second screw rod nut is in threaded connection with the second screw rod.

Firstly, a reduction gearbox is fixedly arranged on the second sliding plate, and penetrates through the first sliding plate to extend into a groove of the first sliding plate; the input end of the reduction gearbox is fixedly connected with the other output shaft of the double-output shaft motor in a coaxial manner; a long gear is fixedly arranged at the output end of the reduction gearbox, a gear is rotatably arranged in the groove, and the gear is meshed with the long gear; a first transverse sliding groove is formed in the first mounting frame, a rack is fixedly arranged in the first sliding groove, and the rack is meshed with the long gear.

Further, a transverse second sliding groove is formed in the first mounting frame, and a first lead screw is rotatably arranged in the second sliding groove; a first motor is fixedly arranged on one side of the box body, which is close to the second chute, and the output end of the first motor is fixedly connected with a first screw rod in a coaxial manner; the bottom end of the first sliding plate is fixedly provided with a first screw nut which is in threaded connection with the first screw;

the right side of first mounting bracket is fixed to be provided with the baffle, and the second slide is fixed to be set up in one side of baffle, and the second slide rotates with first lead screw to be connected.

Further, a reciprocating screw rod is rotationally arranged in the first chute; one end of the reciprocating screw rod, which penetrates through the transverse plate, is fixedly provided with a belt pulley, and the belt pulley and an output shaft of the third motor are sleeved with a belt; the lower end of the first sliding plate is fixedly provided with a third screw nut which is in threaded connection with the reciprocating screw rod.

Further, the polishing assembly comprises a polishing wheel and a fourth motor, the fourth motor is fixedly arranged at the upper end of the second sliding plate, and the output end of the fourth motor is fixedly connected with the polishing wheel coaxially.

Further, two box doors are hinged to the front side of the box body, and the two box doors are bilaterally symmetrical; each box door is provided with a visual window.

Compared with the prior art, the utility model has the following beneficial effects: through the cooperation of the screw rod nut and the first screw rod, the first sliding plate carries the first locating cone and the second sliding plate carries the second locating cone to move in opposite directions, so that the workpiece is rapidly and accurately located and clamped; starting a third motor to enable the second positioning cone to drive the workpiece to rotate; the first sliding plate drives the grinding wheel to reciprocate left and right through the matching of the rack and the gear, and the surface of the workpiece is processed in all directions; through the cooperation of nut and second lead screw for the second sliding plate drives the radial motion of abrasive wheel, in order to be applicable to the work piece of various sizes.

Drawings

FIG. 1 is a schematic view of the external structure of the present utility model;

FIG. 2 is a schematic view showing the internal structure of embodiment 1 of the present utility model;

FIG. 3 is a schematic view showing a partial structure in embodiment 1 of the present utility model;

FIG. 4 is a schematic view of the construction of the sanding assembly of the present utility model;

FIG. 5 is a schematic view showing the internal structure of embodiment 2 of the present utility model;

FIG. 6 is a schematic view showing a partial structure of embodiment 2 of the present utility model;

fig. 7 is a schematic view of the construction of the sanding assembly of the present utility model.

In the figure: 1. a case; 2. a support column; 3. a door; 4. a visual window; 5. a first mounting frame; 6. a first chute; 7. a second chute; 8. a slide rail; 9. a first slide plate; 10. a first positioning cone; 11. a first mounting plate; 12. grinding wheel; 13. a double output shaft motor; 14. a reduction gearbox; 15. a first sliding plate; 16. a second sliding plate; 17. a rack; 18. a first screw rod; 19. a second screw rod; 20. a gear; 21. a long gear; 22. a first motor; 23. a second motor; 24. a third motor; 25. a second slide plate; 26. a second positioning cone; 27. a second mounting plate; 28. a reciprocating screw rod; 29. a fourth motor; 30. a belt.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Example 1

As shown in fig. 1 to 4, the technical scheme adopted by the utility model is as follows: the utility model provides a piston rod surface precision processingequipment, includes top box 1, and box 1 bottom mounting sets up first mounting bracket 5. Four slide rails 8 are fixedly arranged on the first mounting frame 5, and two slide rails 8 are a group. The two groups of slide rails 8 are symmetrically arranged front and back. A group of clamping components are respectively arranged on the left side and the right side of the group of sliding rails 8 on the rear side. A first locating cone 10 is rotatably arranged on the left set of clamping assemblies. A second locating cone 26 is rotatably disposed on the right hand clamp assembly. The first positioning cone 10 and the second positioning cone 26 are arranged opposite to each other, and the axes of the first positioning cone and the second positioning cone are positioned on the same horizontal line. The two groups of clamping assemblies drive the first positioning cone 10 and the second positioning cone 26 to move in opposite directions, so that the workpiece is rapidly and accurately positioned and clamped. The second positioning cone 26 and the first positioning cone 10 drive the workpiece to rotate, so that the workpiece can be processed in all directions. A first sliding plate 15 is arranged on the group of sliding rails 8 on the front side in a left-right sliding manner, and a polishing assembly which moves back and forth is arranged on the first sliding plate 15. The polishing assembly moves left and right to comprehensively process the workpiece, and the polishing assembly moves back and forth to be applicable to workpieces with different sizes to process the workpieces.

The left clamping assembly comprises a first slide plate 9 and a first mounting plate 11. The first slide plate 9 is slidably arranged on a set of slide rails 8. The first mounting plate 11 is fixedly provided on the first slide plate 9. The first positioning cone 10 is rotatably provided at one side of the upper portion of the first mounting plate 11.

The right hand clamp assembly includes a second slide plate 25, a second mounting plate 27. The second slide plate 25 is slidably arranged on the right side of the same set of slide rails 8. The second mounting plate 27 is fixedly provided on the second slide plate 25. The second positioning cone 26 is rotatably provided at one side of the upper portion of the second mounting plate 27.

The other side of the upper portion of the second mounting plate 27 is fixedly provided with a third motor 24. The output end of the third motor 24 passes through the second mounting plate 27 and is fixedly connected with the second positioning cone 26 coaxially. The third motor 24 rotates the second positioning cone 26.

The grinding assembly comprises a grinding wheel 12 and a double output shaft motor 13. The upper end of the first sliding plate 15 is provided with an opening. Both sides on the first sliding plate 15 are fixedly provided with sliding ways. A second slide plate 16 is slidably disposed on the slideway. The double output shaft motor 13 is fixedly disposed above the second slide plate 16. The grinding wheel 12 is coaxially and fixedly arranged on one output shaft of the double output shaft motor 13.

The first sliding plate 15 is provided with a groove. A second screw rod 19 is rotatably arranged in the groove. A second lead screw nut is fixedly arranged at the lower end of the second sliding plate 16. The second screw nut is in threaded connection with the second screw 19. The second screw 19 cooperates with the second screw nut to move the second screw nut back and forth. The second lead screw nut moves the second slide plate 16 forward and backward.

The second motor 23 is fixedly provided at the front side of the first slide plate 15. The axis of the second motor 23 is disposed horizontally back and forth. The output end of the second motor 23 passes through the first sliding plate 15 and is fixedly connected with the second screw rod 19 in a coaxial manner. The second motor 23 rotates the second screw 19.

The first mounting frame 5 is provided with a first transverse chute 6. A rack 17 is fixedly arranged in the first chute 6. A gear 20 is rotatably provided in the groove of the first slide plate 15. The gear 20 is engaged with the rack 17. The second slide plate 16 is fixedly provided with a reduction gearbox 14. One end of the reduction gearbox 14 extends through the second slide plate 16 into the recess of the first slide plate 15. The second sliding plate 16 drives the reduction gearbox 14 to move. The input end of the reduction gearbox 14 is fixedly connected with the other output shaft of the double-output shaft motor 13 in a coaxial manner, and the double-output shaft motor 13 enables the reduction gearbox 14 to operate. The lower end of the second sliding plate 16 is fixedly provided with a sliding block which is in sliding fit with the inner wall of the groove, and the sliding block is rotationally connected with the output end of the reduction gearbox 14. The output end of the reduction gearbox 14 is fixedly connected with a long gear 21. The reduction gearbox 14 rotates the long gear 21. The long gear 21 is meshed with the gear 20. The long gear 21 drives the gear 20 to rotate.

The first mounting frame 5 is provided with a transverse second chute 7. The second chute 7 is rotatably provided with a first screw 18. The bottom ends of the first sliding plate 9 and the second sliding plate 25 are fixedly provided with a first screw nut which is in threaded connection with the first screw 18. The first screw 18 moves the first slide plate 9 and the second slide plate 25 toward each other.

The first motor 22 is fixedly arranged on one side of the box body 1 close to the second chute 7. The output end of the first motor 22 passes through the box body 1 and is fixedly connected with the first screw rod 18 coaxially. The first motor 22 rotates the first screw 18.

The box 1 lower extreme is fixed to be set up four support columns 2, and four support columns 2 are the four corners setting, play the supporting role to box 1. Two box doors 3 are hinged to the front side of the box body 1. Each box door 3 is provided with a visual window 4, so that the internal condition of the box body 1 can be conveniently observed.

In summary, in the initial state, the first sliding plate 9 and the second sliding plate 25 are in a far away state, and the grinding wheel 12 is positioned at one side in the box body 1.

In operation, the first motor 22 is activated. The first motor 22 rotates the first screw 18. The first screw rod 18 drives the first sliding plate 9 and the second sliding plate 25 to move in opposite directions, the first positioning cone 10 and the second positioning cone 26 move along with the first sliding plate 9 and the second sliding plate, and the first positioning cone 10 and the second positioning cone 26 rapidly advance and accurately position a workpiece and clamp the workpiece. After clamping the workpiece, the first motor 22 is turned off. The third motor 24 is started, the third motor 24 enables the second locating cone 26 to rotate, and the second locating cone 26 drives the workpiece to rotate, so that the workpiece is processed in all directions.

When the position of the polishing assembly is required to be adjusted, the second motor 23 is started, the second motor 23 enables the second screw rod 19 to rotate, the second screw rod 19 enables the second sliding plate 16 to slide, the second sliding plate 16 moves with the reduction gearbox 14, the reduction gearbox 14 moves with the grinding wheel 12 through the double-output shaft motor 13, and the grinding wheel 12 is adjusted to be at a proper position, and the second motor 23 is turned off.

The double output shaft motor 13 is restarted, and the double output shaft motor 13 rotates the grinding wheel 12. The double-output-shaft motor 13 enables the reduction gearbox 14 to operate, the long gear 21 rotates, the long gear 21 drives the gear 20 to rotate, the gear 20 is matched with the rack 17, the gear 20 drives the first sliding plate 15 to move leftwards, and a workpiece is machined. The reversing double output shaft motor 13 rotates the first slide plate 15 rightward. The first sliding plate 15 reciprocates to process the workpiece.

When the machining is completed, the second motor 23 is controlled to move the grinding wheel 12 away from the outer surface of the workpiece. The first motor 22 is controlled, the first motor 22 drives the first slide plate 9 and the second slide plate 25 to move reversely, the workpiece is loosened, and the workpiece is taken out to prepare for the next processing.

Example 2

As shown in fig. 5 to 7, only the differences from embodiment 1 are described here, and the remaining same parts are not described in detail here. The first mounting frame 5 is provided with a transverse second sliding groove 7, and a first screw rod 18 is rotationally arranged in the second sliding groove 7. A first motor 22 is fixedly arranged on one side of the box body 1 close to the second chute 7, and the output end of the first motor 22 is fixedly connected with the first screw rod 18 in a coaxial manner. The bottom end of the first sliding plate 9 is fixedly provided with a first screw nut which is in threaded connection with the first screw 18. The first screw nut brings the first slide plate 9 and the first positioning cone 10 close to the second slide plate 25 to clamp the workpiece.

The right side of the first mounting frame 5 is fixedly provided with a partition plate. The second slide plate 25 is fixedly arranged on one side of the partition plate, and the second slide plate 25 is rotatably connected with the first screw rod 18. The other side of the partition is fixedly provided with a third motor 24. The output shaft of the third motor 24 passes through the partition plate and is fixedly connected with the second positioning cone 26 coaxially. The third motor 24 rotates the second positioning cone 26.

A reciprocating screw 28 is rotatably provided in the first chute 6. One end of the reciprocating screw rod 28 penetrating through the transverse plate is fixedly provided with a belt pulley, and the belt pulley drives the reciprocating screw rod 28 to rotate. A belt 30 is sleeved on the belt pulley and the output shaft of the third motor 24. The third motor 24 drives the belt 30, and the belt 30 rotates the pulley. A third lead screw nut is fixedly provided at the lower end of the first slide plate 15. The third screw nut is in threaded connection with the reciprocating screw 28.

The sharpening assembly includes a sharpening wheel 12, a fourth motor 29. The fourth motor 29 is fixedly arranged at the upper end of the second sliding plate 16, and the output end of the fourth motor 29 is fixedly connected with the grinding wheel 12 in a coaxial way. The fourth motor 29 rotates the grinding wheel 12.

To sum up, when the position of the sharpening assembly needs to be adjusted. The second motor 23 is started, the second motor 23 enables the second screw rod 19 to rotate, the second screw rod 19 enables the second sliding plate 16 to slide, the second sliding plate 16 moves with the fourth motor 29, the fourth motor 29 moves with the grinding wheel 12, and the grinding wheel 12 is adjusted to be in a proper position to switch off the second motor 23.

The first motor 22 is activated and the first motor 22 rotates the first lead screw 18. The first screw rod 18 drives the first sliding plate 9 to move towards the second sliding plate 25, and the first positioning cone 10 and the second positioning cone 26 rapidly advance and accurately position the workpiece and clamp the workpiece. After clamping the workpiece, the first motor 22 is turned off.

The third motor 24 is started, the third motor 24 enables the second positioning cone 26 to rotate, and the second positioning cone 26 drives the workpiece to rotate. The third motor 24 drives the belt 30 to drive, the belt 30 drives the belt pulley to rotate, the belt pulley drives the reciprocating screw rod 28 to rotate, and the reciprocating screw rod 28 is matched with the third screw rod nut to enable the first sliding plate 15 to move left and right. The first sliding plate 15 drives the grinding wheel 12 to move left and right, and the workpiece is processed in all directions.

Although the present utility model has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present utility model.

Claims

1. The utility model provides a piston rod surface precision processingequipment which characterized in that includes: the box body (1), the bottom of the box body (1) is fixedly provided with a first mounting frame (5); four sliding rails (8) are fixedly arranged on the first mounting frame (5), every two sliding rails (8) are in a group, and the two groups of sliding rails (8) are arranged in a front-back symmetrical mode; wherein two groups of clamping components are arranged on one group of sliding rails (8) at the rear side; a first locating cone (10) is rotationally arranged on one group of clamping assemblies, a second locating cone (26) is rotationally arranged on the other group of clamping assemblies, and the axes of the first locating cone (10) and the second locating cone (26) are positioned on the same horizontal line; a first sliding plate (15) which moves left and right is arranged on a group of sliding rails (8) on the front side in a sliding manner, and a polishing assembly which moves back and forth is arranged on the first sliding plate (15) in a sliding manner.

2. The device for precisely machining the outer surface of the piston rod according to claim 1, wherein: the left group of clamping components comprises a first sliding plate (9) and a first mounting plate (11), the first sliding plate (9) is arranged on the left side of the rear side sliding rail (8) in a sliding manner, the first mounting plate (11) is fixedly arranged on the first sliding plate (9), and the first positioning cone (10) is rotatably arranged on the upper part of the first mounting plate (11);

the right side a set of clamping assembly includes second slide (25), second mounting panel (27), and second slide (25) set up the right side at rear side rail (8), and second mounting panel (27) are fixed to be set up on second slide (25), and second locating cone (26) rotate the upper portion that sets up in second mounting panel (27), and second locating cone (26) are in same horizontal line with first locating cone (10) axis.

3. The device for precisely machining the outer surface of the piston rod according to claim 2, wherein: a third motor (24) is fixedly arranged on one side of the second mounting plate (27), and the output end of the third motor (24) is fixedly connected with the second positioning cone (26) in a coaxial manner.

4. The device for precisely machining the outer surface of the piston rod according to claim 2, wherein: a transverse second sliding groove (7) is formed in the first mounting frame (5), and a first screw rod (18) is rotationally arranged in the second sliding groove (7); a first motor (22) is fixedly arranged on one side of the box body (1) close to the second chute (7), and the output end of the first motor (22) is fixedly connected with the first screw rod (18) in a coaxial manner; the bottoms of the first sliding plate (9) and the second sliding plate (25) are fixedly provided with a first screw nut, and the first screw nut is in threaded connection with the first screw (18).

5. The device for precisely machining the outer surface of the piston rod according to claim 2, wherein: the polishing assembly comprises a polishing wheel (12) and a double-output shaft motor (13), and an opening is formed in the upper end of the first sliding plate (15); the upper end of the first sliding plate (15) is provided with a second sliding plate (16) in a sliding way; a groove is formed in the first sliding plate (15), a second screw rod (19) is rotatably arranged in the groove, a second screw rod nut is fixedly arranged at the bottom end of the second sliding plate (16), the second screw rod nut is sleeved on the second screw rod (19), and the second screw rod nut is in threaded connection with the second screw rod (19); the double-output-shaft motor (13) is fixedly arranged at the upper end of the second sliding plate (16), and the grinding wheel (12) is coaxially and fixedly arranged on one output shaft of the double-output-shaft motor (13).

6. The device for precisely machining the outer surface of the piston rod according to claim 5, wherein: a reduction gearbox (14) is fixedly arranged on the second sliding plate (16), and the reduction gearbox (14) penetrates through the second sliding plate (16) and stretches into the groove of the first sliding plate (15); the input end of the reduction gearbox (14) is fixedly connected with the other output shaft of the double-output shaft motor (13) in a coaxial way; a long gear (21) is fixedly arranged at the output end of the reduction gearbox (14); a gear (20) is rotatably arranged in the groove, and the gear (20) is meshed with a long gear (21); a first transverse sliding groove (6) is formed in the first mounting frame (5), a rack (17) is fixedly arranged in the first sliding groove (6), and the rack (17) is meshed with the long gear (21).

7. A piston rod outer surface precision machining apparatus according to claim 3, wherein: a transverse second sliding groove (7) is formed in the first mounting frame (5), and a first screw rod (18) is rotationally arranged in the second sliding groove (7); a first motor (22) is fixedly arranged on one side of the box body (1) close to the second chute (7), and the output end of the first motor (22) is fixedly connected with the first screw rod (18) in a coaxial manner; the bottom end of the first sliding plate (9) is fixedly provided with a first screw nut which is in threaded connection with the first screw (18);

the right side of first mounting bracket (5) is fixed to be provided with the baffle, and second slide (25) are fixed to be set up in one side of baffle, and second slide (25) are connected with first lead screw (18) rotation.

8. The device for precisely machining the outer surface of the piston rod according to claim 7, wherein: a first transverse chute (6) is formed in the box body (1), a reciprocating screw rod (28) is rotationally arranged in the first chute (6), a belt pulley is fixedly arranged at one end of the reciprocating screw rod (28) penetrating through the transverse plate, and a belt (30) is sleeved on the belt pulley and an output shaft of the third motor (24); a third screw nut is fixedly arranged at the lower end of the first sliding plate (15), and the third screw nut is in threaded connection with the reciprocating screw rod (28).

9. A piston rod outer surface precision machining apparatus according to claim 3, wherein: the polishing assembly comprises a polishing wheel (12) and a fourth motor (29), wherein the fourth motor (29) is fixedly arranged at the upper end of the second sliding plate (16), and the output end of the fourth motor (29) is fixedly connected with the polishing wheel (12) in a coaxial way.

10. The device for precisely machining the outer surface of the piston rod according to claim 1, wherein: the front side of the box body (1) is hinged with two box doors (3), and the two box doors (3) are bilaterally symmetrical; each box door (3) is provided with a visual window (4).