A polishing device for hydraulic cylinder production

Abstract

The present invention relates to the field of hydraulic cylinder production, and in particular to a polishing device for hydraulic cylinder production. The purpose of the present invention is to solve the shortcomings of the background technology and propose a polishing device for hydraulic cylinder production. In order to achieve the above purpose, the technical solution adopted by the present invention is: a polishing device for hydraulic cylinder production, including a square frame and a right-angle seat fixedly connected to the rear side of the square frame, an extension seat fixedly connected to the rear side of the right-angle seat, a rotating rod rotatably connected to the bottom of the right-angle seat, a plurality of convex seats are evenly fixedly connected to the right end of the rotating rod along the circumferential direction, each convex seat is rotatably connected to a linkage plate I, the left side of each linkage plate I is rotatably connected to a linkage plate II through a connecting seat, the left side of each linkage plate II is rotatably connected to a sliding ring along the circumferential direction, and the sliding ring is slidably connected to the rotating rod.

Description

Technical Field

[0001] The invention relates to the field of hydraulic cylinder production, and in particular to a polishing device used for hydraulic cylinder production. Background Art

[0002] The hydraulic cylinder is an actuator in the hydraulic transmission system. It is an energy conversion device that converts hydraulic energy into mechanical energy. The hydraulic motor realizes continuous rotary motion, while the hydraulic cylinder realizes reciprocating motion. During the production of the hydraulic cylinder, polishing it is an essential part of the entire production process.

[0003] In the prior art, for example, there is a polishing device for hydraulic cylinder production with patent number 202322532730.3, which can fix hydraulic cylinders of different sizes by pressing them with the cylinder body through the joint action of a movable block and bolts. However, it is not suitable for adaptive grinding and polishing according to the different diameters of different positions on the inner surface of the hydraulic cylinder during the production of hydraulic cylinders. Summary of the invention

[0004] The purpose of the present invention is to solve the shortcomings of the background technology and to propose a polishing device for hydraulic cylinder production.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a polishing device for hydraulic cylinder production, comprising a square frame and a right-angle seat fixedly connected to the rear side of the square frame, an extension seat fixedly connected to the rear side of the right-angle seat, a rotating rod rotatably connected to the bottom of the right-angle seat, a plurality of convex seats evenly and fixedly connected to the right end of the rotating rod along the circumferential direction, a linkage plate I is rotatably connected to each convex seat, a linkage plate II is rotatably connected to the left side of each linkage plate I through a connecting seat, the left side of each linkage plate II is rotatably connected to a sliding ring along the circumferential direction, the sliding ring is slidably connected to the rotating rod, a circular seat is fixedly connected to the top of each connecting seat, and a steel brush seat is fixedly connected to each circular seat.

[0006] Preferably, a plurality of threaded holes are evenly arranged on the left half of the rotating rod.

[0007] Preferably, an insertion hole is provided through the rear side of the top of the sliding ring, a bolt is inserted into the insertion hole and installed in any one of the threaded holes, an adaptation pad is sleeved on the upper side of the bolt, and the lower side surface of the adaptation pad is in mating contact with the outer surface of the sliding ring.

[0008] Preferably, the left end of the rotating rod is fixedly connected to a cylindrical frame, the left side of the cylindrical frame is fixedly connected to a power rod, the left side of the power rod is rotatably connected to the left side of the extension seat, the left end of the power rod is fixedly connected to a third motor, and the upper side of the third motor is fixedly connected to the left side of the extension seat.

[0009] Preferably, the interior of the cylindrical frame is fixedly connected to a fixing seat, the interior of the fixing seat is fixedly connected to a liquid storage barrel, a long tube is fixed and connected to the right side of the liquid storage barrel, a round plate is fixed and connected to the right side of the long tube, the round plate is located at the right end of the rotating rod, a plurality of nozzles are evenly fixed and connected to the outer side of the round plate along the circumferential direction, and a lid is installed on the left side of the liquid storage barrel.

[0010] Preferably, a sliding hole is provided at each corner of the square frame, and the four sliding holes are respectively slidably connected to the middle and lower sides of the left and right sides of the sliding frame, a support rod is fixedly connected to the middle of the lower side of the sliding frame, and a clamping arc I is fixedly connected to the upper side of the support rod, a strip hole is respectively provided on the left and right sides of the upper side of the sliding frame, and the two strip holes are respectively slidably connected to the left and right sides of the cross bar, a vertical frame is fixedly connected to the bottom of the middle part of the cross bar, a clamping arc II is fixedly connected to the bottom of the vertical frame, a movable end of an electric push rod II is fixedly connected to the upper side of the vertical frame, the fixed end of the electric push rod II is fixedly connected to the middle part of the upper side of the sliding frame, and a protruding plate is fixedly connected to the right side of the vertical frame.

[0011] Preferably, a limit seat is fixedly connected to the left and right sides of the cross bar respectively.

[0012] Preferably, an engaging seat is fixedly connected to the middle part of the right side of the sliding frame, and a lead screw is threadedly connected to the middle part of the engaging seat. The front and rear sides of the lead screw are respectively rotatably connected to the front and rear sides of the right side of the square frame, and the front side of the lead screw is fixedly connected to the first motor, and the left side of the first motor is fixedly connected to the square frame.

[0013] Preferably, a rectangular hole I is respectively provided on the front and rear sides of the middle part of the clamping arc I, and a side plate I is fixedly connected to the left side of each rectangular hole I, and a rectangular hole II is respectively provided on the front and rear sides of the middle part of the clamping arc II, and a side plate II is fixedly connected to the right side of each rectangular hole II, the left sides of the two side plates I are respectively slidably connected to the front and rear sides of a two-way frame, and the right sides of the two side plates II are respectively slidably connected to the front and rear sides of another two-way frame, and the front and rear sides of each two-way frame are respectively rotatably connected to a short rod, and the left side of each short rod is respectively fixedly connected to a fitting wheel, and each fitting wheel is evenly provided with a plurality of grooves along the circumferential direction, and the right side of each short rod is respectively fixedly connected to a pulley, and the two pulleys on each two-way frame are respectively connected for transmission through two belts, and the right side of each short rod located at the rear side is respectively fixedly connected to a second motor, and the two second motors are respectively fixedly connected to the rear sides of the two two-way frames.

[0014] Preferably, the right side of each of the two-way frames is fixedly connected to the movable end of an electric push rod Ⅰ, the fixed end of the electric push rod Ⅰ located on the upper side is fixedly connected to the bottom of the protruding plate, and the fixed end of the electric push rod Ⅰ located on the lower side is fixedly connected to the bottom of the sliding frame.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] When manufacturing hydraulic cylinders, it is convenient to perform adaptive grinding and polishing according to the different diameters of different positions on the inner surface of the hydraulic cylinder;

[0017] After the inner surface of the hydraulic cylinder is polished by the high-speed circular motion steel brush seat, the hydraulic cylinder is withdrawn and the polishing position is adaptively cooled and rinsed;

[0018] When the inner surface of the hydraulic cylinder is polished by a steel brush holder that moves in a high-speed circular motion, it is convenient to clamp the hydraulic cylinder from the outer surface of the hydraulic cylinder and at the same time the clamped hydraulic cylinder can be adjusted laterally, so that when the inner surface of the hydraulic cylinder is polished by the steel brush holder, the hydraulic cylinder can be fed laterally to expand the area of ​​the steel brush holder when polishing the inner surface of the hydraulic cylinder of the same diameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the partial structure of a square frame of a polishing device for hydraulic cylinder production according to the present invention;

[0020] Figure 2 It is a schematic diagram of the partial structure of a sliding frame of a polishing device for hydraulic cylinder production according to the present invention;

[0021] Figure 3 It is a schematic diagram of the partial structure of a two-way frame of a polishing device for hydraulic cylinder production according to the present invention;

[0022] Figure 4 It is a schematic diagram of the partial structure of a laminating wheel of a polishing device for hydraulic cylinder production according to the present invention;

[0023] Figure 5 It is a schematic diagram of the partial structure of a vertical frame of a polishing device for hydraulic cylinder production according to the present invention;

[0024] Figure 6 It is a schematic diagram of the partial structure of the clamping arc II of a polishing device for the production of hydraulic cylinders according to the present invention;

[0025] Figure 7 It is a schematic diagram of the partial structure of a rotating rod of a polishing device for hydraulic cylinder production according to the present invention;

[0026] Figure 8It is a schematic diagram of the partial structure of a cylindrical frame of a polishing device for hydraulic cylinder production according to the present invention;

[0027] Fig. 9 It is a schematic diagram of the partial structure of a long tube of a polishing device for hydraulic cylinder production according to the present invention;

[0028] Fig.10 It is a partial structural schematic diagram of a liquid storage barrel of a polishing device for hydraulic cylinder production according to the present invention;

[0029] Fig.11 It is a schematic diagram of the partial structure of an adaptable pad of a polishing device for hydraulic cylinder production according to the present invention;

[0030] Fig.12 It is a schematic diagram of the overall structure of the first part of a polishing device for hydraulic cylinder production according to the present invention;

[0031] Fig.13 This is a schematic diagram of the overall structure of the second part of a polishing device for hydraulic cylinder production according to the present invention.

[0032] 1. Square frame; 2. Sliding hole; 3. Right-angle seat; 4. Extension seat; 5. Lead screw; 6. First motor; 7. Sliding frame; 8. Strip hole; 9. Engagement seat; 10. Support rod; 11. Clamping arc Ⅰ; 12. Rectangular hole Ⅰ; 13. Side plate Ⅰ; 14. Two-way frame; 15. Short rod; 16. Fitting wheel; 17. Pulley; 18. Belt; 19. Groove; 20. Second motor; 21. Electric push rod Ⅰ; 22. Vertical frame; 23. Crossbar; 24. Limit seat; 25. Electric push rod Ⅱ; 26. Clamping Arc II; 27, rectangular hole II; 28, side plate II; 29, protruding plate; 30, rotating rod; 31, convex seat 31; 32, linkage plate I; 33, connecting seat; 34, circular seat; 35, steel brush seat; 36, linkage plate II; 37, sliding ring; 38, insertion hole; 39, threaded hole; 40, cylindrical frame; 41, fixed seat; 42, power rod; 43, third motor; 44, long tube; 45, round plate; 46, nozzle; 47, liquid storage barrel; 48, cover; 49, bolt; 50, adaptation pad. DETAILED DESCRIPTION

[0033] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0034] like Figure 1-Figure 13A polishing device for hydraulic cylinder production shown in the figure comprises a square frame 1 and a right-angle seat 3 fixedly connected to the rear side of the square frame 1, an extension seat 4 fixedly connected to the rear side of the right-angle seat 3, a rotating rod 30 rotatably connected to the bottom of the right-angle seat 3, a plurality of convex seats 31 evenly and fixedly connected to the right end of the rotating rod 30 along the circumferential direction, each convex seat 31 is rotatably connected to a linkage plate I 32, the left side of each linkage plate I 32 is rotatably connected to a linkage plate II 36 through a connecting seat 33, the left side of each linkage plate II 36 is rotatably connected to a sliding ring 37 along the circumferential direction, the sliding ring 37 is slidably connected to the rotating rod 30, each connecting seat 33 is fixedly connected to a circular seat 34 on the top, each circular seat 34 is fixedly connected to a steel brush seat 35, and a steel brush is provided on the surface of the steel brush seat 35.

[0035] like Figure 1-Figure 13 As shown, a plurality of threaded holes 39 are evenly arranged on the left half of the rotating rod 30 .

[0036] like Figure 1-Figure 13 As shown, an insertion hole 38 is provided through the rear side of the top of the sliding ring 37, a bolt 49 is inserted into the insertion hole 38 and installed in any one of the threaded holes 39, an adaptation pad 50 is sleeved on the upper side of the bolt 49, and the lower side surface of the adaptation pad 50 is in contact with the outer surface of the sliding ring 37.

[0037] like Figure 1-Figure 13 As shown, the left end of the rotating rod 30 is fixedly connected to the cylindrical frame 40, the left side of the cylindrical frame 40 is fixedly connected to the power rod 42, the left side of the power rod 42 is rotatably connected to the left side of the extension seat 4, the left end of the power rod 42 is fixedly connected to the third motor 43, and the upper side of the third motor 43 is fixedly connected to the left side of the extension seat 4.

[0038] like Figure 1-Figure 13 As shown, the interior of the cylindrical frame 40 is fixedly connected to a fixing seat 41, the interior of the fixing seat 41 is fixedly connected to a liquid storage barrel 47, a long tube 44 is fixed and connected to the right side of the liquid storage barrel 47, a round plate 45 is fixed and connected to the right side of the long tube 44, the round plate 45 is located at the right end of the rotating rod 30, a plurality of nozzles 46 are evenly fixed and connected to the outer side of the round plate 45 along the circumferential direction, and a cover 48 is installed on the left side of the liquid storage barrel 47.

[0039] like Figure 1-Figure 13As shown, a sliding hole 2 is respectively provided at the four corners of the square frame 1, and the four sliding holes 2 are respectively slidably connected to the middle and lower sides of the left and right sides of the sliding frame 7, a support rod 10 is fixedly connected to the middle of the lower side of the sliding frame 7, and a clamping arc Ⅰ11 is fixedly connected to the upper side of the support rod 10, and a strip hole 8 is respectively provided on the left and right sides of the upper side of the sliding frame 7, and the two strip holes 8 are respectively slidably connected to the left and right sides of the cross bar 23, a vertical frame 22 is fixedly connected to the bottom of the middle part of the cross bar 23, and a clamping arc Ⅱ26 is fixedly connected to the bottom of the vertical frame 22, and a movable end of an electric push rod Ⅱ25 is fixedly connected to the upper side of the vertical frame 22, and the fixed end of the electric push rod Ⅱ25 is fixedly connected to the middle of the upper side of the sliding frame 7, and a protruding plate 29 is fixedly connected to the right side of the vertical frame 22.

[0040] like Figure 1-Figure 13 As shown, a limit seat 24 is fixedly connected to the left and right sides of the cross bar 23 respectively.

[0041] like Figure 1-Figure 13 As shown, an engaging seat 9 is fixedly connected to the middle part of the right side of the sliding frame 7, and a lead screw 5 is threadedly connected to the middle part of the engaging seat 9. The front and rear sides of the lead screw 5 are rotatably connected to the front and rear sides of the right side of the square frame 1 respectively, and the front side of the lead screw 5 is fixedly connected to the first motor 6, and the left side of the first motor 6 is fixedly connected to the square frame 1.

[0042] like Figure 1-Figure 13 As shown, a rectangular hole Ⅰ12 is respectively provided on the front and rear sides of the middle of the clamping arc Ⅰ11, and a side plate Ⅰ13 is fixedly connected to the left side of each rectangular hole Ⅰ12. A rectangular hole Ⅱ27 is respectively provided on the front and rear sides of the middle of the clamping arc Ⅱ26, and a side plate Ⅱ28 is fixedly connected to the right side of each rectangular hole Ⅱ27. The left sides of the two side plates Ⅰ13 are respectively slidably connected to the front and rear sides of a two-way frame 14, and the right sides of the two side plates Ⅱ28 are respectively slidably connected to the front and rear sides of another two-way frame 14. Each two-way frame The front and rear sides of 14 are rotatably connected to a short rod 15 respectively, the left side of each short rod 15 is fixedly connected to a fitting wheel 16 respectively, and each fitting wheel 16 is evenly provided with a plurality of grooves 19 along the circumferential direction, the right side of each short rod 15 is fixedly connected to a pulley 17 respectively, and the two pulleys 17 on each two-way frame 14 are respectively connected through two belts 18 for transmission, and the right side of each short rod 15 located at the rear side is fixedly connected to a second motor 20 respectively, and the two second motors 20 are respectively fixedly connected to the rear sides of the two two-way frames 14.

[0043] like Figure 1-Figure 13 As shown, the right side of each of the two-way frames 14 is fixedly connected to the movable end of an electric push rod Ⅰ21, the fixed end of the electric push rod Ⅰ21 located on the upper side is fixedly connected to the bottom of the protruding plate 29, and the fixed end of the electric push rod Ⅰ21 located on the lower side is fixedly connected to the bottom of the sliding frame 7.

[0044] When manufacturing the hydraulic cylinder, in order to facilitate adaptive grinding and polishing work according to the different diameters of different positions on the inner surface of the hydraulic cylinder, when using it, first extend the right side of the rotating rod 30 into the interior of the hydraulic cylinder, and manually adjust the sliding ring 37 laterally according to the diameters of different positions inside the hydraulic cylinder, and then push the connecting seat 33 to the right through the multiple linkage plates II 36 located on the sliding ring 37, and the linkage plate I 32 located on the right side of each connecting seat 33 rotates by relying on its right side convex seat 31, and the synchronous connecting seat 33 performs a lifting movement, so that the circular seat 34 located on each connecting seat 33 is lifted and lowered, and the steel brush seat 35 located on each circular seat 34 is lifted and lowered synchronously, and then the steel brush seat 35 is lifted and lowered to fit the surface at any position inside the hydraulic cylinder. , so that the steel brush holder 35 is limited to fit to the inner surface of any position of the hydraulic cylinder, so that the insertion hole 38 on the sliding ring 37 corresponds to the threaded hole 39 at the position, and the bolt 49 with the adaptation pad 50 is screwed into the corresponding threaded hole 39, so that the steel brush holder 35 is limited to fit to the inner surface of any position of the hydraulic cylinder, at this time, the third motor 43 is driven to rotate the power rod 42, and the cylindrical frame 40 is driven to rotate synchronously through the power rod 42, and the rotating rod 30 is driven to rotate on the right-angle seat 3 through the cylindrical frame 40, and the steel brush holder 35 with high-speed circular motion can grind and polish any position of the inner surface of the hydraulic cylinder, so as to facilitate adaptive grinding and polishing according to the different diameters of different positions on the inner surface of the hydraulic cylinder, thereby improving the diversity of the overall work;

[0045] After the inner surface of the hydraulic cylinder is polished by the high-speed circular motion steel brush holder 35, the hydraulic cylinder is withdrawn. In order to facilitate the adaptive cooling and showering of the polishing position, a certain amount of water is stored in the liquid storage barrel 47 in advance. The water can be introduced into the liquid storage barrel 47 by pulling out the cover 48, and then the cover 48 is sealed. When the rotating rod 30 rotates, the synchronous liquid storage barrel 47 rotates along the central axis of the rotating rod 30, and then the water in the liquid storage barrel 47 passes through the long tube 44 through the centrifugal force of the rotation. The water flows into the round plate 45, and the water is thrown out by the multiple nozzles 46 on the round plate 45, so that after the inner surface of the hydraulic cylinder is polished by the high-speed circular motion steel brush seat 35, the hydraulic cylinder is withdrawn and the polishing position is adaptively cooled and showered to prevent the staff from being scalded when contacting the hydraulic cylinder after polishing. A small water pump can be installed at the connection between the left side of the long tube 44 and the liquid storage barrel 47 to circulate the water. The water pump is adaptively installed according to the actual situation.

[0046] When the inner surface of the hydraulic cylinder is polished by the steel brush holder 35 in high-speed circular motion, the hydraulic cylinder can be clamped from the outer surface of the hydraulic cylinder and the clamped hydraulic cylinder can be adjusted laterally, so that the hydraulic cylinder can be fed laterally when the inner surface of the hydraulic cylinder is polished by the steel brush holder 35 to expand the area of ​​the steel brush holder 35 for polishing the inner surface of the hydraulic cylinder of the same diameter. When in use, the two electric push rods Ⅰ21 are driven in advance so that the two-way frame at the active end thereof 14 drives the fitting wheels 16 on both sides thereof to extend into the corresponding two rectangular holes Ⅰ12 and two rectangular holes Ⅱ27, and then places the hydraulic cylinder in the clamping arc Ⅰ11. At this time, the electric push rod Ⅱ25 is driven to make the vertical frame 22 located on its movable end drive the clamping arc Ⅱ26 on its lower side to clamp the hydraulic cylinder between the clamping arc Ⅱ26 and the clamping arc Ⅰ11, and then the first motor 6 is driven to make the lead screw 5 rotate, and the meshing seat 9 connected with the lead screw 5 by threaded transmission drives the sliding frame 7 and the middle of the sliding frame 7 to be clamped. The hydraulic cylinder clamped between the clamping arc II 26 and the clamping arc I 11 moves toward the rotating rod 30 to perform the above-mentioned grinding and polishing of the inner surface of the hydraulic cylinder. When grinding and polishing, the two second motors 20 are driven to rotate the short rod 15 located on the rear side. Under the transmission work between each pulley 17 and the belt 18, the fitting wheel 16 on the left side of each short rod 15 rotates, and the friction between the surfaces of the hydraulic cylinder in contact therewith is increased synchronously through the grooves 19 on each fitting wheel 16, so that the hydraulic cylinder located between the clamping arc II 26 and the clamping arc I 11 moves to one side. When the inner surface of the hydraulic cylinder is ground and polished by the steel brush holder 35 with high-speed circular motion, in order to facilitate the clamping of the hydraulic cylinder from the outer surface of the hydraulic cylinder, the clamped hydraulic cylinder can be adjusted laterally, so that when the inner surface of the hydraulic cylinder is ground and polished by the steel brush holder 35, the hydraulic cylinder can be fed laterally to expand the area when the steel brush holder 35 is used to grind and polish the inner surface of the hydraulic cylinder of the same diameter.

[0047] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A polishing device for hydraulic cylinder production, comprising a square frame (1) and a right-angle seat (3) fixedly connected to the rear side of the square frame (1), an extension seat (4) fixedly connected to the rear side of the right-angle seat (3), and a rotating rod (30) rotatably connected to the bottom of the right-angle seat (3), characterized in that: The right end of the rotating rod (30) is evenly and fixedly connected to a plurality of convex seats (31) along the circumferential direction, each convex seat (31) is rotatably connected to a linkage plate I (32), the left side of each linkage plate I (32) is rotatably connected to a linkage plate II (36) via a connecting seat (33), the left side of each linkage plate II (36) is rotatably connected to a sliding ring (37) along the circumferential direction, the sliding ring (37) is slidably connected to the rotating rod (30), the top of each connecting seat (33) is fixedly connected to a circular seat (34), and each circular seat (34) is fixedly connected to a steel brush seat (35); The left half of the rotating rod (30) is evenly provided with a plurality of threaded holes (39); An insertion hole (38) is provided through the rear side of the top of the sliding ring (37), a bolt (49) is inserted into the insertion hole (38) and installed in any one of the threaded holes (39), an adaption pad (50) is sleeved on the upper side of the bolt (49), and the lower side surface of the adaption pad (50) is in mating contact with the outer surface of the sliding ring (37); The left end of the rotating rod (30) is fixedly connected to a cylindrical frame (40), the left side of the cylindrical frame (40) is fixedly connected to a power rod (42), the left side of the power rod (42) is rotatably connected to the left side of the extension seat (4), the left end of the power rod (42) is fixedly connected to a third motor (43), and the upper side of the third motor (43) is fixedly connected to the left side of the extension seat (4); The interior of the cylindrical frame (40) is fixedly connected to a fixing seat (41), the interior of the fixing seat (41) is fixedly connected to a liquid storage barrel (47), a long tube (44) is fixed to and connected to the right side of the liquid storage barrel (47), a round plate (45) is fixed to and connected to the right side of the long tube (44), the round plate (45) is located at the right end of the rotating rod (30), a plurality of nozzles (46) are evenly fixed to and connected to the outer side of the round plate (45) along the circumferential direction, and a cover (48) is installed on the left side of the liquid storage barrel (47); The square frame (1) is provided with a sliding hole (2) at each of the four corners, and the four sliding holes (2) are respectively slidably connected to the middle and lower sides of the left and right sides of the sliding frame (7); a support rod (10) is fixedly connected to the middle of the lower side of the sliding frame (7); a clamping arc I (11) is fixedly connected to the upper side of the support rod (10); a strip hole (8) is respectively provided on the left and right sides of the upper side of the sliding frame (7); the two strip holes (8) are respectively slidably connected to the left and right sides of the cross bar (23); a vertical frame (22) is fixedly connected to the bottom of the middle of the cross bar (23); a clamping arc II (26) is fixedly connected to the bottom of the vertical frame (22); a movable end of an electric push rod II (25) is fixedly connected to the upper side of the vertical frame (22); the fixed end of the electric push rod II (25) is fixedly connected to the middle of the upper side of the sliding frame (7); and a protruding plate (29) is fixedly connected to the right side of the vertical frame (22); The middle part of the right side of the sliding frame (7) is fixedly connected to an engagement seat (9), the middle part of the engagement seat (9) is threadedly connected to a lead screw (5), the front and rear sides of the lead screw (5) are respectively rotatably connected to the front and rear sides of the right side of the square frame (1), the front side of the lead screw (5) is fixedly connected to a first motor (6), and the left side of the first motor (6) is fixedly connected to the square frame (1); A rectangular hole I (12) is respectively provided on the front and rear sides of the middle of the clamping arc I (11), and a side plate I (13) is fixedly connected to the left side of each rectangular hole I (12). A rectangular hole II (27) is respectively provided on the front and rear sides of the middle of the clamping arc II (26), and a side plate II (28) is fixedly connected to the right side of each rectangular hole II (27). The left sides of the two side plates I (13) are respectively slidably connected to the front and rear sides of a two-way frame (14), and the right sides of the two side plates II (28) are respectively slidably connected to the front and rear sides of another two-way frame (14). Each two-way frame (14) The front and rear sides are rotatably connected to a short rod (15), respectively; the left side of each short rod (15) is fixedly connected to a fitting wheel (16), each fitting wheel (16) is evenly provided with a plurality of grooves (19) along the circumferential direction; the right side of each short rod (15) is fixedly connected to a pulley (17), the two pulleys (17) on each bidirectional frame (14) are respectively connected in transmission via two belts (18), the right side of each short rod (15) at the rear side is fixedly connected to a second motor (20), and the two second motors (20) are respectively fixedly connected to the rear sides of the two bidirectional frames (14).

2. A polishing device for hydraulic cylinder production according to claim 1, characterized in that: A limit seat (24) is fixedly connected to the left and right sides of the cross bar (23) respectively.

3. A polishing device for hydraulic cylinder production according to claim 2, characterized in that: The right side of each bidirectional frame (14) is fixedly connected to the movable end of an electric push rod I (21), the fixed end of the electric push rod I (21) located on the upper side is fixedly connected to the bottom of the protruding plate (29), and the fixed end of the electric push rod I (21) located on the lower side is fixedly connected to the bottom of the sliding frame (7).

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