CN120551445B

CN120551445B - Drilling device for oil inlet and outlet of oil cylinder

Info

Publication number: CN120551445B
Application number: CN202511047051.4A
Authority: CN
Inventors: 汤旦丹; 余彦冬; 陈万勇; 王健伟; 顾丽莉; 秦榛
Original assignee: Jiangyin Hongteng Machinery Co ltd
Current assignee: Jiangyin Hongteng Machinery Co ltd
Priority date: 2025-07-29
Filing date: 2025-07-29
Publication date: 2025-09-23
Anticipated expiration: 2045-07-29
Also published as: CN120551445A

Abstract

The invention relates to the technical field of oil cylinder drilling, in particular to an oil cylinder oil inlet and outlet drilling device which comprises a base, wherein a drilling unit is arranged on the base, a three-grab chuck and a telescopic shaft are coaxially arranged on the base and used for clamping and positioning an oil cylinder, a top seat is also arranged on the base and positioned between the three-grab chuck and the telescopic shaft and used for supporting the oil cylinder, a central shaft of the top seat and a central shaft of the three-grab chuck are positioned on the same vertical surface, a box body is arranged at the bottom of the top seat and can be lifted relative to the base, and the height of an alignment shaft is automatically adjusted according to the diameter of a cylindrical oil cylinder.

Description

Drilling device for oil inlet and outlet of oil cylinder

Technical Field

The invention relates to the technical field of oil cylinder drilling, in particular to an oil inlet and outlet drilling device of an oil cylinder.

Background

The cylinder, also called hydraulic cylinder, is an executive component in a hydraulic transmission system, and has the core function of converting hydraulic energy into mechanical energy, and pushing a piston to perform linear reciprocating motion or swinging motion so as to realize force transmission and motion control, wherein the cylinder body of the cylinder is mostly cylindrical, square, elliptic and the like, the oil inlet and outlet of the cylinder is usually arranged on the side surfaces of two ends of the cylinder body, and when drilling is performed, a horizontal drilling machine is mostly adopted, and after the cylinder is horizontally fixed by a three-grab chuck, drilling is performed at two ends of the cylinder by a drilling tool.

The existing oil cylinder is often unable to automatically complete the clamping and fixing of the oil cylinder during drilling, and because the oil cylinder and the three-grab chuck are required to be coaxially fixed, the oil cylinder is mostly manually completed to fix the oil cylinder, then drilling is performed by a drilling tool, and workers are required to continuously adjust the angle of the oil cylinder during clamping, so that the situation that the oil cylinder can not skew in the clamping to influence the drilling precision is ensured, the situation is relatively dependent on personal experience, and when the oil cylinder model is large, the clamping is often required to be completed by matching of multiple people, the labor intensity is high, the efficiency is low, and potential safety hazards exist.

Disclosure of Invention

The invention provides a drilling device for an oil inlet and an oil outlet of an oil cylinder, which aims to solve the problems that clamping and fixing of the oil cylinder cannot be automatically completed in the related art, and the clamping and fixing of the oil cylinder are mostly completed manually, and then drilling is carried out by a drilling tool.

The oil inlet and outlet drilling device of the oil cylinder comprises a base, wherein a drilling unit is arranged on the base, and a three-grabbing chuck and a telescopic shaft are coaxially arranged on the base and used for clamping and positioning the oil cylinder;

the base is also provided with a top seat positioned between the three-grabbing chuck and the telescopic shaft and used for placing and supporting the oil cylinder, the central shaft of the top seat and the central shaft of the three-grabbing chuck are positioned on the same vertical surface, and the bottom of the top seat is provided with a box body which can be lifted relative to the base;

An alignment shaft and an arc-shaped sleeve which are matched are arranged between the box body and the three-grab chuck, and the alignment shaft can enter the arc-shaped sleeve along with the lifting of the box body, so that the central shafts of the alignment shaft and the three-grab chuck are parallel to the same horizontal plane;

The alignment device is characterized in that the alignment device comprises a top seat, a positioning shaft, a positioning plate, a pressing plate, a positioning plate and a positioning plate, wherein the positioning plate and the pressing plate are arranged in the top seat, the pressing plate can descend in the top seat when the oil cylinder is placed, so that the positioning plate slides along the top seat to calibrate the position of the oil cylinder, the central shaft of the oil cylinder and the central shaft of the top seat are parallel to the same vertical plane, and the positioning shaft is driven to descend in the movement of the positioning plate, so that the central shaft of the positioning shaft and the central shaft of the oil cylinder are parallel to the same horizontal plane.

Preferably, the base is fixedly provided with a clamping table and a positioning table, the three-grab chuck is rotationally assembled on one side of the clamping table, which is close to the positioning table, and the telescopic shaft is rotationally assembled on one side of the positioning table, which is close to the clamping table.

Preferably, a side square groove is formed in one end, close to the three-grab chuck, of the box body, an alignment frame is slidably arranged in the side square groove, and an alignment shaft is arranged at the outer end of the alignment frame and located under the arc-shaped sleeve.

Preferably, the footstock is the V-arrangement wholly, and transverse groove and V-arrangement groove have been seted up to the inside of footstock, and transverse groove is seted up at its middle part along the length direction of footstock, and clamp plate sliding fit establishes in transverse groove, and the V-arrangement groove has a plurality of equipartitions along transverse groove length direction equidistance, and all sets up with transverse groove mutually perpendicular, and the calibration board sliding fit is in the V-arrangement groove.

Preferably, the bottom of the calibration plate is transversely fixed with a sliding rod positioned in the box body, a support plate fixed in the box body is arranged outside the sliding rod, and an elastic piece is arranged between the support plate and the calibration plate.

Preferably, the bottom fixed mounting of clamp plate has the spacing platform that is located the box, and the side of spacing platform comprises tilting part and vertical portion, and the one end fixed mounting that the slide bar kept away from the calibration board has the lug, and the tip of lug hugs closely vertical portion setting.

Preferably, the bottom of the limit table is provided with a sinking groove, an upper cylinder is fixedly arranged in the sinking groove, the bottom end of the upper cylinder is slidably provided with a lower cylinder, the lower cylinder is vertically fixed in the box body, and a spring is arranged between the lower cylinder and the upper cylinder.

Preferably, the inside of box is vertical to rotate and is had the screw thread post, and screw thread post external screw thread is connected with the screw thread cover, and the screw thread cover is fixed mutually with the inner of counterpoint frame, and the outside coaxial fixed with of screw thread post has the rack, and fixed mounting has the rack on the calibration board that is close to the screw thread post, and rack and gear mesh mutually.

Preferably, the drilling unit comprises a base, a lifting table and a drill bit, wherein the base is arranged on the base, the lifting table is arranged on the base and can lift relative to the base, and the drill bit is rotationally assembled at the bottom of the lifting table.

Preferably, the holding tank has been seted up at the top of base, and the box sets up in the holding tank, and one side of holding tank is provided with the slide rail of fixed mounting on the base, and base sliding assembly is on the slide rail.

When the three-jaw chuck is used, the height of the alignment shaft is automatically adjusted according to the diameter of the cylindrical oil cylinder, so that the oil cylinder can be accurately coaxially aligned with the three-jaw chuck when the alignment shaft is matched with the arc sleeve, clamping and fixing of the three-jaw chuck and the telescopic shaft to the oil cylinder are facilitated, the clamping precision of the cylindrical oil cylinder can be improved, the oil cylinder can be kept in a horizontal state in a drilling hole, clamping deflection is avoided, drilling precision is improved, the clamping and positioning difficulty of the cylindrical oil cylinder can be reduced, the labor intensity of a user is reduced, and the clamping efficiency of the cylindrical oil cylinder is improved.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a front view of the present invention.

Fig. 3 is a perspective view of the placement stage of the present invention.

Fig. 4 is a schematic view of the structure of the inside of the placement stage of the present invention.

Fig. 5 is a side view of fig. 4 in accordance with the present invention.

Fig. 6 is a front cross-sectional view of the placement stage of the present invention.

FIG. 7 is a schematic diagram of the structure of the calibration assembly of the present invention.

Fig. 8 is a schematic structural view of the alignment frame of the present invention.

Reference numerals:

10. base, 11, accommodation groove, 12, slide rail, 20, clamping and positioning seat, 21, clamping table, 22, three-grip chuck, 23, positioning table, 24, telescopic shaft, 30, drilling unit, 31, base, 32, lifting table, 33, drill bit, 40, placing table, 41, box, 411, side groove, 42, top seat, 421, transverse groove, 422, V-shaped groove, 50, calibration component, 51, calibration plate, 52, slide bar, 53, support plate, 531, bump, 54, elastic piece, 60, pushing component, 61, pressing plate, 611, supporting plate, 62, limiting table, 621, sinking groove, 63, telescopic cylinder, 631, lower cylinder, 632, upper cylinder 633, spring, 70, alignment component, 71, alignment frame, 72, alignment shaft, 73, arc sleeve, 80, transmission component, 81, screw column, 82, screw sleeve, 83, gear, 84, rack.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

As shown in fig. 1 to 8, the oil inlet and outlet drilling device for the oil cylinder comprises a base 10, a clamping and positioning seat 20, a drilling unit 30, a placing table 40, a calibration assembly 50, a pushing assembly 60, an alignment assembly 70 and a transmission assembly 80, wherein the clamping and positioning seat 20 and the drilling unit 30 are arranged above the base 10, the drilling unit 30 can drill holes after the oil cylinder is fixed by the clamping and positioning seat 20, the placing table 40 is arranged in the base 10 and used for supporting the oil cylinder, the calibration assembly 50 in the placing table 40 is matched with the pushing assembly 60 to calibrate the position of the oil cylinder when the oil cylinder is placed, and the transmission assembly 80 in the placing table 40 is used for driving the alignment assembly 70 to move in the calibration of the oil cylinder, and the alignment assembly 70 is matched with the clamping and positioning seat 20 to rapidly fix the oil cylinder on the placing table 40.

Referring to fig. 1 and 2, a receiving groove 11 is formed at the top of a base 10, and a slide rail 12 fixedly installed on the base 10 is provided at one side of the receiving groove 11.

Referring to fig. 1 and 2, the clamping and positioning seat 20 includes a clamping table 21, a three-grip chuck 22, a positioning table 23 and a telescopic shaft 24, wherein the clamping table 21 and the positioning table 23 are fixedly installed on the base 10, the three-grip chuck 22 is rotatably assembled on one side of the clamping table 21 close to the positioning table 23 and used for clamping and fixing an oil cylinder, and the telescopic shaft 24 is rotatably assembled on one side of the positioning table 23 close to the clamping table 21 and coaxially arranged with the three-grip chuck 22 and can stretch and retract, and then is propped against the tail end of the oil cylinder to strengthen the oil cylinder.

Referring to fig. 1 and 2, the drilling unit 30 includes a base 31, a lifting table 32 and a drill bit 33, the base 31 is slidably assembled on the slide rail 12, and can move above the base 10 along the slide rail 12, the lifting table 32 is disposed on the base 31, and can lift relative to the base 31, the drill bit 33 is rotatably assembled at the bottom of the lifting table 32, and can lift under the driving of the lifting table 32, so as to drill holes on the oil cylinder.

Referring to fig. 1,2, 3 and 4, the placement table 40 is composed of a box 41 and a top seat 42, the box 41 is disposed inside the accommodating groove 11, an air cylinder is disposed at the bottom of the box 41, the box 41 can be driven to be lifted and lowered into the accommodating groove 11, the top seat 42 is integrally V-shaped and fixedly assembled at the top of the box 41, and a central shaft of the top seat 42 and a central shaft of the three-grabbing chuck 22 are located on the same vertical surface for supporting an oil cylinder, so that after the oil cylinder is placed, the central shaft of the oil cylinder can be located on the same vertical surface with the central shaft of the three-grabbing chuck 22.

Referring to fig. 1, 3 and 5, a side slot 411 is formed at one end of the case 41 near the three-grip chuck 22, a lateral slot 421 and a V-shaped slot 422 are formed inside the top seat 42, so that the inside of the case 41 is communicated with the outside, the lateral slot 421 is formed in the middle of the case 42 along the length direction of the top seat 42, a plurality of V-shaped slots 422 are uniformly distributed along the length direction of the lateral slot 421 at equal intervals, and the V-shaped slots 422 are all perpendicular to the lateral slot 421.

Referring to fig. 3, fig. 4, fig. 5 and fig. 7, the plurality of sets of calibration assemblies 50 are respectively disposed in the plurality of V-shaped grooves 422, the calibration assemblies 50 include a calibration plate 51, a sliding rod 52, a support plate 53 and an elastic member 54, the calibration plate 51 is slidably assembled in the V-shaped grooves 422, the bottom end extends into the case 41, the sliding rod 52 is transversely fixed on the calibration plate 51, the support plate 53 is fixedly mounted in the case 41, one end of the sliding rod 52, which is far away from the calibration plate 51, penetrates the support plate 53 and is fixed with a bump 531, the elastic member 54 is disposed between the calibration plate 51 and the support plate 53, and is used for applying a tensile force to the calibration plate 51 towards the direction of the transverse grooves 421, so that the calibration plate 51 slides along the V-shaped grooves 422 to the transverse grooves 421, in this scheme, the elastic member 54 is specifically a tension spring, is sleeved outside the sliding rod 52, in other schemes, the elastic member 54 may also be an elastic rope, a memory elastic sheet, etc.

Referring to fig. 5, the pushing component 60 includes a pressing plate 61, a limiting table 62 and a telescopic cylinder 63, the pressing plate 61 is slidably assembled in the transverse groove 421, and can slide up and down in the transverse groove 421, the limiting table 62 is located inside the box 41 and fixed with the pressing plate 61, the pressing plate 61 capable of following sliding is lifted, both left and right side surfaces (i.e. side surfaces close to the calibration plate 51) of the limiting table 62 are composed of inclined portions and vertical portions, the end portions of the convex blocks 531 are tightly attached to the vertical portions, the vertical portions of the limiting table 62 limit the convex blocks 531, the calibration plate 51 keeps away from the supporting plate 53, the elastic piece 54 is stretched, the telescopic cylinder 63 is arranged between the limiting table 62 and the box 41, vertical thrust can be applied to the limiting table 62 in a telescopic manner, the pressing plate 61 is kept to be stretched out to a state above the top seat 42 by the transverse groove 421, after the cylinder is placed on the top seat 42, the pressing plate 61 is pressed into the box 41, the limiting table 62 is lowered and compressed to the telescopic cylinder 63, along with the lowering of the limiting table 62, the inclined portions move to the side of the convex blocks 531, the side of the convex blocks 531 are tightly attached to the vertical portions, the central shaft is reset to the vertical groove 422 is removed along the vertical groove 422, and the same as the vertical groove is reset to the vertical groove 422 is reset, the position of the cylinder is enabled to be aligned with the upper position of the cylinder seat 422, and the central shaft is reset along with the vertical groove 422, and the position of the vertical groove is reset to the position along with the position of the vertical groove 53.

Referring to fig. 5 and 6, the supporting plate 611 is fixedly installed at the top of the pressing plate 61, so that the contact area with the oil cylinder can be increased, the pressing plate 61 better enters the box 41 when the oil cylinder is placed, the sinking groove 621 is formed in the bottom of the limiting table 62, the telescopic cylinder 63 comprises a lower cylinder 631, an upper cylinder 632 and a spring 633, the lower cylinder 631 is vertically fixed in the box 41, the top end of the upper cylinder 632 is fixedly installed in the sinking groove 621, the bottom end of the upper cylinder 632 is slidably assembled in the lower cylinder 631, the spring 633 is arranged between the lower cylinder 631 and the upper cylinder 632, the elasticity of the spring 633 is larger than that of the elastic piece 54, and the upper cylinder 632 slides and stretches under the lower cylinder 631 under the action of the spring 633 so as to push the limiting table 62 to lift and reset.

Referring to fig. 1,2 and 8, the alignment assembly 70 includes an alignment frame 71, an alignment shaft 72 and an arc sleeve 73, the alignment frame 71 is slidably assembled in the side slot 411, the alignment shaft 72 is disposed at an outer end of the alignment frame 71 (an end located outside the case 41), the arc sleeve 73 is fixedly installed on one side of the three-grip chuck 22 and located right above the alignment shaft 72, and is adapted to the shape and size of the alignment shaft 72, so that the raised alignment shaft 72 can be limited, and after the alignment shaft 72 completely enters the arc sleeve 73, a central axis of the alignment shaft 72 and a central axis of the three-grip chuck 22 are parallel to the same horizontal plane. The alignment shaft 72 is positioned to match the alignment plate 51, and when the alignment plate 51 and the alignment shaft 72 are positioned at the initial position, the cylinder tangential to the alignment plate 51 is parallel to the alignment shaft 72 at the same horizontal plane.

Referring to fig. 4 and 5, the transmission assembly 80 includes a threaded column 81, a threaded sleeve 82, a gear 83 and a rack 84, the threaded column 81 is vertically rotatably assembled inside the case 41, the threaded sleeve 82 is in threaded connection with the exterior of the threaded column 81 and is fixed to the inner end (one end located inside the case 41) of the alignment frame 71, the gear 83 is coaxially fixed to the exterior of the threaded column 81, the rack 84 is fixedly mounted on the alignment plate 51 close to the threaded column 81 and is meshed with the gear 83, when the alignment plate 51 moves, the rack 84 is driven to push the gear 83 to rotate, the threaded column 81 is driven to push the threaded sleeve 82 to move, the alignment frame 71 is driven to lift, the alignment shaft 72 can lift synchronously with the movement of the alignment plate 51, when the alignment plate 51 completes the alignment of the oil cylinder, the alignment shaft 72 can stay at the side of the oil cylinder, the central axis of the oil cylinder is parallel to the horizontal plane, and then when the alignment shaft 72 is lifted into the arc sleeve 73, the oil cylinder can be coaxial with the three-grip chuck 22 so as to drill the positioning hole of the oil cylinder.

The working principle is that an oil cylinder is arranged above the top seat 42, the pressing plate 61 is pressed to descend into the box 41, the pressing plate 61 drives the limiting table 62 to descend to compress the telescopic cylinder 63, the inclined part moves to the side of the convex block 531 to a little to release the blocking of the convex block 531, the elastic piece 54 pulls the calibration plate 51 to approach the oil cylinder along the V-shaped groove 422, the oil cylinder is pushed to the middle part of the top seat 42, the central axis of the oil cylinder and the central axis of the top seat 42 are parallel to the same vertical plane, and the central axes of the oil cylinder and the three-grab chuck 22 are parallel to the same vertical plane because the central axes of the top seat 42 and the three-grab chuck 22 are parallel to the same vertical plane.

While the calibration plate 51 moves, the rack 84 pushes the gear 83 to rotate, so that the threaded column 81 rotates to push the threaded sleeve 82 to descend, and the alignment frame 71 and the alignment shaft 72 descend, so that the calibration plate 51 and the alignment shaft 72 synchronously move to displace by the same distance, and when the calibration plate 51 is attached to the side of the oil cylinder, the central axis of the alignment shaft 72 is just parallel to the central axis of the oil cylinder.

After the box 41 is lifted and the alignment shaft 72 is clamped into the arc-shaped sleeve 73, the central shaft of the alignment shaft 72 and the central shaft of the three-grabbing chuck 22 are parallel to the same horizontal plane, so that the oil cylinder and the three-grabbing chuck 22 are kept coaxial, the telescopic shaft 24 stretches to jack the oil cylinder into the three-grabbing chuck 22, the three-grabbing chuck 22 clamps the oil cylinder, and the oil cylinder is supported and fixed under the cooperation of the telescopic shaft 24.

The box 41 is lowered to be separated from the oil cylinder, the oil inlet and outlet of the oil cylinder is drilled by the drilling unit 30, after the pressure of the oil cylinder is lost by the pressing plate 61, the telescopic cylinder 63 stretches to push the limiting table 62 to reset, the pressing plate 61 stretches out to the upper portion of the top seat 42 again, meanwhile, the limiting table 62 pushes the protruding block 531 to enable the sliding rod 52 to slide and retreat, the calibration plate 51 is driven to reset, and the calibration plate 51 drives the alignment frame 71 and the alignment shaft 72 to reset so as to support the next oil cylinder.

According to the invention, the height of the alignment shaft 72 is automatically adjusted through the diameter of the cylindrical oil cylinder, so that the oil cylinder can be accurately coaxially aligned with the three-jaw chuck 22 when the alignment shaft 72 is matched with the arc-shaped sleeve 73, and then the clamping and fixing of the three-jaw chuck 22 and the telescopic shaft 24 to the oil cylinder are facilitated, so that the clamping precision of the cylindrical oil cylinder can be improved, the oil cylinder can be kept in a horizontal state in a drilling hole, the clamping deflection is avoided, the drilling hole precision is improved, the clamping and positioning difficulty of the cylindrical oil cylinder can be reduced, the labor intensity of a user is reduced, and the clamping efficiency of the cylindrical oil cylinder is improved.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims

1. The oil inlet and outlet drilling device of the oil cylinder comprises a base (10), wherein a drilling unit (30) is arranged on the base (10), and is characterized in that a three-grabbing chuck (22) and a telescopic shaft (24) are coaxially arranged on the base (10) and used for clamping and positioning the oil cylinder;

The base (10) is also provided with a top seat (42) positioned between the three-grabbing chuck (22) and the telescopic shaft (24) and used for supporting the placement of the oil cylinder, the central shaft of the top seat (42) and the central shaft of the three-grabbing chuck (22) are positioned on the same vertical surface, and the bottom of the top seat (42) is provided with a box body (41) which can be lifted relative to the base (10);

An adaptive alignment shaft (72) and an arc-shaped sleeve (73) are arranged between the box body (41) and the three-grab chuck (22), and the alignment shaft (72) can enter the arc-shaped sleeve (73) along with the lifting of the box body (41) so that the central axes of the alignment shaft and the three-grab chuck (22) are parallel to the same horizontal plane;

a calibration plate (51) and a pressing plate (61) are arranged in the top seat (42), the pressing plate (61) can descend in the top seat (42) when the oil cylinder is placed, the calibration plate (51) slides along the top seat (42) to calibrate the position of the oil cylinder, the central axis of the oil cylinder and the central axis of the top seat (42) are parallel to the same vertical plane, and the alignment shaft (72) is driven to descend in the movement of the calibration plate (51), so that the central axis of the alignment shaft (72) and the central axis of the oil cylinder are parallel to the same horizontal plane;

A side square groove (411) is formed in one end, close to the three-grab chuck (22), of the box body (41), an alignment frame (71) is slidably assembled in the side square groove (411), and an alignment shaft (72) is arranged at the outer end of the alignment frame (71) and is positioned under the arc-shaped sleeve (73);

The top seat (42) is integrally V-shaped, a transverse groove (421) and a V-shaped groove (422) are formed in the top seat (42), the transverse groove (421) is formed in the middle of the top seat along the length direction of the top seat (42), the pressing plate (61) is slidably assembled in the transverse groove (421), the V-shaped grooves (422) are uniformly distributed along the length direction of the transverse groove (421) at equal intervals and are perpendicular to the transverse groove (421), and the calibration plate (51) is slidably assembled in the V-shaped groove (422);

A sliding rod (52) positioned in the box body (41) is transversely fixed at the bottom end of the calibration plate (51), a support plate (53) fixed in the box body (41) is arranged outside the sliding rod (52), and an elastic piece (54) is arranged between the support plate (53) and the calibration plate (51);

A limit table (62) positioned in the box body (41) is fixedly arranged at the bottom of the pressing plate (61), the side surface of the limit table (62) consists of an inclined part and a vertical part, a lug (531) is fixedly arranged at one end of the sliding rod (52) away from the calibration plate (51), and the end part of the lug (531) is tightly attached to the vertical part;

the inside of box (41) is vertical to rotate has screw thread post (81), and screw thread post (81) outside threaded connection has thread bush (82), and thread bush (82) are fixed mutually with the inner of counterpoint frame (71), and the outside coaxial gear (83) that is fixed with of screw thread post (81), is close to on calibrating board (51) fixed mounting of screw thread post (81) rack (84), and rack (84) are engaged with gear (83).

2. The oil cylinder oil inlet and outlet drilling device according to claim 1, wherein the clamping table (21) and the positioning table (23) are fixedly installed on the base (10), the three-grab chuck (22) is rotatably assembled on one side of the clamping table (21) close to the positioning table (23), and the telescopic shaft (24) is rotatably assembled on one side of the positioning table (23) close to the clamping table (21).

3. The oil cylinder oil inlet and outlet drilling device according to claim 1, wherein a sink groove (621) is formed in the bottom of the limiting table (62), an upper cylinder (632) is fixedly installed in the sink groove (621), a lower cylinder (631) is slidably installed at the bottom end of the upper cylinder (632), the lower cylinder (631) is vertically fixed in the box body (41), and a spring (633) is arranged between the lower cylinder (631) and the upper cylinder (632).

4. The oil cylinder oil inlet and outlet drilling device according to claim 1, wherein the drilling unit (30) comprises a base (31), a lifting table (32) and a drill bit (33), the base (31) is arranged on the base (10), the lifting table (32) is arranged on the base (31) and can lift relative to the base (31), and the drill bit (33) is rotatably assembled at the bottom of the lifting table (32).

5. The oil cylinder oil inlet and outlet drilling device according to claim 4, wherein the top of the base (10) is provided with a containing groove (11), the box body (41) is arranged in the containing groove (11), one side of the containing groove (11) is provided with a sliding rail (12) fixedly installed on the base (10), and the base (31) is slidably assembled on the sliding rail (12).