CN213392939U

CN213392939U - Inner-cooling type rotary oil cylinder

Info

Publication number: CN213392939U
Application number: CN202021833972.6U
Authority: CN
Inventors: 金灿灿; 罗国章
Original assignee: Zhejiang Jingsu Machine Tool Accessories Co ltd
Current assignee: Zhejiang Jingsu Machine Tool Accessories Co ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-06-08
Anticipated expiration: 2030-08-27

Abstract

The application relates to an inner-cooling type rotary oil cylinder, which relates to the technical field of rotary oil cylinders and comprises a cylinder body and a mounting seat, wherein the cylinder body comprises a front cylinder and a rear cylinder, the front cylinder and the rear cylinder are connected through bolts to form a piston cavity between the front cylinder and the rear cylinder, a piston rod is connected in the piston cavity in a sliding mode along the axial direction of the cylinder body, an oil path shaft is arranged in the cylinder body, the oil path shaft is rotatably arranged in the mounting seat, a first oil path and a second oil path are arranged in the oil path shaft, a first oil inlet communicated with the first oil path and a second oil inlet communicated with the second oil path are correspondingly arranged on the mounting seat, a liquid outlet is formed in the piston rod, a liquid inlet is formed in the mounting seat, the oil path shaft penetrates through the piston rod. This application is through setting up the coolant liquid passageway for the axle center department that the chuck was aimed at to the mouth that sprays, the coolant liquid of being convenient for sprays to the tubulose work piece in, thereby has the effect of being convenient for cool down and remove the bits to tubulose work piece inner wall.

Description

Inner-cooling type rotary oil cylinder

Technical Field

The application relates to the technical field of rotary oil cylinders, in particular to an inner-cooling type rotary oil cylinder.

Background

At present, the rotary oil cylinder has wide application, and is commonly used in machine tool machining. The rotary oil cylinder is arranged at the rear end of the machine tool spindle and rotates along with the spindle, and the chuck or the clamp is driven to clamp or loosen a workpiece by outputting reciprocating push-pull force.

When a tubular workpiece is machined, the rotary oil cylinder is matched with the hollow hydraulic chuck for installation and use. In the machining process, cooling liquid is required to be sprayed onto the workpiece from the outside to cool the workpiece or remove chips.

In the above-described related art, the inventors consider that: when the inner wall of the pipe of the tubular workpiece is machined, the traditional cooling liquid spraying mode can only spray the cooling liquid to the outside of the tubular workpiece, and the cooling liquid cannot enter the inner wall of the pipe of the tubular workpiece for cooling or removing chips.

SUMMERY OF THE UTILITY MODEL

In order to facilitate the cooling or scrap removal of the inner wall of the pipe of the tubular workpiece, the utility model aims to provide an inner-cooling type rotary oil cylinder.

The application provides an inner cooling type rotary oil cylinder adopts following technical scheme:

an inner-cooling type rotary oil cylinder comprises a cylinder body and a mounting seat, wherein the cylinder body comprises a front cylinder and a rear cylinder, the front cylinder and the rear cylinder are connected through bolts to form a piston cavity between the front cylinder and the rear cylinder, a piston rod is connected in the piston cavity in a sliding manner along the axial direction of the cylinder body, an oil path shaft is arranged in the cylinder body and is rotatably arranged in the mounting seat, a first oil path is arranged in the oil path shaft and is communicated with the piston cavity close to one side of the rear cylinder, a second oil path is also arranged in the oil path shaft and is communicated with the piston cavity close to one side of the front cylinder, a first oil inlet communicated with the first oil path and a second oil inlet communicated with the second oil path are correspondingly arranged on the mounting seat, a liquid outlet is arranged on the piston rod, and a liquid inlet is arranged on the mounting seat, the oil way shaft penetrates into the piston rod, and a cooling liquid channel communicated with the liquid inlet and the liquid outlet is formed in the oil way shaft.

By adopting the technical scheme, when the inner wall of the tubular workpiece is machined, oil enters the first oil inlet and then enters one side, close to the rear cylinder, of the piston cavity through the first oil way, the piston rod is pushed to move towards the front cylinder in the piston cavity, and the chuck is driven to clamp the tubular workpiece. Under the rotation of the main shaft driving the cylinder body, the piston rod drives the oil path shaft to rotate in the mounting seat along with the cylinder body, and the inner wall of the tubular workpiece is machined. When the tubular workpiece needs to be taken down, oil enters the second oil inlet and then enters one side, close to the front cylinder, of the piston cavity through the second oil way, the piston rod is pushed to move towards the oil cylinder in the piston cavity, and then the chuck is driven to loosen the workpiece, so that the tubular workpiece is taken and placed. In the course of working, the coolant liquid gets into the coolant liquid passageway in the oil circuit axle from the inlet, sprays to the inner wall of tubulose work piece on from the liquid outlet through the piston rod, realizes cooling and the chip removal to tubulose work piece inner wall. Therefore, by arranging the cooling liquid channel, the oil path shaft is used as a carrier of the cooling liquid channel, so that the cooling liquid channel penetrates through the cylinder body and the mounting seat, the spraying port is aligned to the axis of the chuck, the cooling liquid is convenient to spray into the tubular workpiece, and the inner wall of the tubular workpiece is convenient to cool and remove scraps.

Optionally, the piston rod includes a piston disc sliding in the piston cavity, and a piston tube sleeved on the oil path shaft, the piston tube extends out of the front cylinder in a direction away from the rear cylinder, one end of the piston tube extending out of the front cylinder is communicated with the liquid outlet, and the piston disc divides the piston cavity into a first cavity communicated with the first oil path and a second cavity communicated with the second oil path.

By adopting the technical scheme, when the piston rod pushes the chuck plate to clamp tightly, the main shaft stops rotating, oil enters the first oil inlet, enters the oil path shaft through the first oil path, enters the first cavity from the oil path shaft, and the oil filled in the first cavity moves the piston plate towards the front cylinder, so that the inner space of the first cavity is increased, the inner space of the second cavity is reduced, and the piston tube slides out of the front cylinder to drive the chuck plate to clamp tightly. When the piston cylinder pushes the chuck to loosen, oil enters the second oil inlet, enters the oil path shaft through the second oil path, enters the second cavity from the oil path shaft, and starts to be filled with the oil in the second cavity. The piston disc is moved towards the rear cylinder, so that the inner space of the second cavity is increased, and the inner space of the first cavity is reduced until the piston tube slides into the second cavity to drive the chuck to loosen. Therefore, through the matching of the piston disc and the piston rod, the piston disc can axially reciprocate in the piston cavity by utilizing the size control of the first oil way on the first cavity and the size control of the second oil way on the second cavity, so that the cylinder body can drive the chuck to clamp or loosen the tubular workpiece.

Optionally, a first annular groove communicated with the first oil path and a second annular groove communicated with the second oil path are formed in the mounting seat.

By adopting the technical scheme, when the piston disc moves towards the front cylinder, oil enters the first oil inlet, enters the first oil way on the oil way shaft through the first annular groove, enters the first cavity from the first oil way, and drives the piston disc to move towards the front cylinder, so that the first cavity is enlarged, and the second cavity is reduced; when the piston disc moves towards the rear cylinder, oil enters the second oil inlet, enters the second oil way on the oil way shaft through the second annular groove, and enters the second chamber from the second oil way, so that the second chamber is enlarged, the first chamber is reduced, and the oil can reversely flow on the oil way shaft back and forth. Therefore, by arranging the first annular groove and the second annular groove, the first annular groove surrounds the first oil passage opening and the second annular groove surrounds the second oil passage opening, so that after the oil passage shaft rotates and has deviation with the first annular groove and the second annular groove, the first oil passage opening and the second oil passage opening are always positioned in the first annular groove and the second annular groove, and oil can smoothly flow into the first oil passage and the second oil passage.

Optionally, one end of the first oil path close to the first oil inlet is communicated with the first ring groove, and one end of the first oil path far from the first oil inlet is communicated with the first cavity.

By adopting the technical scheme, when the piston disc pushes towards the front cylinder, oil enters the first oil inlet, enters the first oil way through the first annular groove, enters the first cavity from the first oil way until the oil is full of the first cavity to push the piston disc to move. Therefore, the first oil inlet, the first annular groove, the first oil way and the first cavity are communicated, and the piston disc is driven to move towards the front cylinder in the piston cavity by filling oil.

Optionally, the second oil path includes an oil passage communicated with the second annular groove, an annular cavity provided in the rear cylinder and communicated with the oil passage, and an oil guide cavity provided in the front cylinder and communicated with the second cavity, and the oil guide cavity extends into the annular cavity along a side wall of the front cylinder.

By adopting the technical scheme, when the piston disc moves towards the rear cylinder, oil enters the second oil inlet, enters the oil through cavity through the second annular groove, enters the oil guide cavity from the oil through cavity, and then enters the second cavity from the oil guide cavity until the oil is full of the second cavity to push the piston disc to move towards the rear cylinder. Therefore, the second oil inlet, the second annular groove, the oil through cavity, the annular cavity, the oil guide cavity and the second cavity are communicated, and oil is conveyed to the second cavity by the annular cavity and the oil guide cavity, so that the second cavity is full of oil, and the piston disc is driven to move towards the rear cylinder in the piston cavity.

Optionally, a first sealing ring is sleeved on the side wall of the piston disc, a first clamping groove for embedding the first sealing ring is formed in the side wall of the piston disc, and the first sealing ring abuts against the inner side wall of the front cylinder and the bottom of the first clamping groove.

Through adopting above-mentioned technical scheme, when the piston dish slided along cylinder body axial direction in the piston chamber, sealing washer one supports tightly between the inside wall of first draw-in groove and preceding jar, realizes the sealed between piston dish and the preceding jar inside wall. Therefore, by arranging the first sealing ring, the first clamping groove is used for fixing the first sealing ring, the first sealing ring is sealed between the piston disc and the inner side wall of the front cylinder, the flowing of oil liquid between the first cavity and the second cavity is reduced, and the sliding tightness of the piston disc is enhanced.

Optionally, the rear cylinder extends towards in the piston cavity and has a boss which is connected with the piston disc in an abutting mode, a second sealing ring is sleeved on the side wall of the boss, a second clamping groove for embedding the second sealing ring is formed in the side wall of the boss, and the second sealing ring abuts against and is tightly arranged between the inner side wall of the front cylinder and the groove bottom of the second clamping groove.

Through adopting above-mentioned technical scheme, when the piston dish when piston intracavity axial slided, sealing washer two on the boss support tightly between the inside wall of second draw-in groove and preceding jar, realize the sealed of preceding jar and back jar junction. Therefore, by arranging the second sealing ring, the second sealing ring is fixed by the second clamping groove, so that the second sealing ring is sealed between the boss and the inner side wall of the rear cylinder, the oil is prevented from overflowing from the joint of the front cylinder and the rear cylinder, and the sealing performance of the joint of the front cylinder and the rear cylinder is enhanced.

Optionally, the oil circuit axle is located the cover is equipped with a plurality of sealing rings on the lateral wall in the piston dish, the confession has been seted up in the piston dish the seal groove of sealing ring embedding, the sealing ring support tightly in the lateral wall of oil circuit axle with between the inside wall of piston dish.

Through adopting above-mentioned technical scheme, when the piston dish removed in the piston chamber along oil circuit axle lateral wall, the sealing ring supported tightly between the inside wall of seal groove and piston dish, realized the sealed between oil circuit axle and the piston dish. Therefore, by arranging the sealing ring, the sealing ring is fixed by the sealing groove, the sealing between the sealing groove and the piston disc is realized, and the oil is reduced from entering the piston pipe from a gap between the oil way shaft and the piston disc, so that the sealing property between the oil way shaft and the piston disc is enhanced.

Optionally, the piston disc is in threaded connection with a plurality of guide posts along the axial direction of the cylinder body, and guide grooves for the guide posts to slide are formed in the inner side walls of the front cylinder and the rear cylinder.

By adopting the technical scheme, when the piston disc is axially moved in the piston cavity, the guide columns are axially moved in the piston cavity along with the piston disc, so that the guide columns are positioned at the two ends of the piston disc and axially move back and forth in the guide grooves, and the piston disc is guided to move. Therefore, the guide post is arranged, the guide groove is used for limiting the moving path of the guide post, and the deviation of the guide post during moving is reduced, so that the deviation of the piston disc during axial movement in the piston cavity is reduced.

Optionally, a plurality of rolling bearings are installed between the outer side wall of the oil way shaft and the inner side wall of the mounting seat, a lubricating pipeline communicated with the plurality of rolling bearings is arranged on the mounting seat, and a liquid through port communicated with the lubricating pipeline is formed in the mounting seat.

By adopting the technical scheme, when the cylinder body rotates along with the chuck, the oil path shaft is driven to rotate in the mounting seat through the rotating bearing. When lubricating liquid needs to be supplemented to the rotating bearings, the lubricating liquid is injected into the liquid through port and flows into the rotating bearings along the lubricating pipeline, and therefore the rotating bearings are lubricated. Consequently through setting up the logical liquid mouth, utilize the direction of lubricated pipeline to lubricated liquid for lubricated liquid flows into rolling bearing, realizes rolling bearing's lubrication, thereby reduces the wearing and tearing of oil circuit axle and mount pad.

In summary, the present application includes at least one of the following beneficial technical effects:

through the arrangement of the cooling liquid channel, the spray port is aligned to the axis of the chuck plate, so that the cooling liquid can be conveniently sprayed into the tubular workpiece, and the inner wall of the tubular workpiece can be conveniently cooled and scraps can be conveniently removed;

by arranging the first annular groove and the second annular groove, after the rotation of the oil path shaft has a deviation from the first annular groove and the second annular groove, the first oil path opening and the second oil path opening are always positioned in the first annular groove and the second annular groove, so that oil can smoothly flow into the first oil path and the second oil path;

by arranging the first sealing ring, the flow of oil between the first chamber and the second chamber is reduced, so that the sliding tightness of the piston disc is enhanced;

through setting up the liquid through-hole, utilize the direction of lubricated pipeline to lubricated liquid for lubricated liquid flows into rolling bearing, realizes rolling bearing's lubrication, thereby reduces the wearing and tearing of oil circuit axle and mount pad.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 is a schematic cross-sectional structure diagram of an embodiment of the present application.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Fig. 4 is an exploded view of an embodiment of the present application.

Description of reference numerals: 1. a cylinder body; 11. a front cylinder; 12. a rear cylinder; 121. a boss; 13. an oil path shaft; 131. a first oil passage; 132. a second oil passage; 1321. an oil cavity is communicated; 1322. an annular cavity; 1323. an oil guide cavity; 133. a coolant passage; 2. a mounting seat; 21. a first oil inlet; 211. a first ring groove; 22. a second oil inlet; 221. a second ring groove; 23. a liquid inlet; 24. a rotating bearing; 241. lubricating the pipeline; 242. a liquid through port; 243. connecting a pipeline; 3. a piston cavity; 31. a first chamber; 32. a second chamber; 4. a piston rod; 41. a piston disc; 411. a first card slot; 4111. a first sealing ring; 412. a second card slot; 4121. a second sealing ring; 413. a sealing groove; 4131. a seal ring; 42. a piston tube; 43. a liquid outlet; 44. a guide post; 441. a guide groove.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses an inner-cooling type rotary oil cylinder.

Referring to fig. 1 and 2, the inner-cooling type rotary oil cylinder comprises a cylinder body 1 and a mounting seat 2 abutted to the cylinder body 1, wherein the cylinder body 1 is used for being coaxially connected with a chuck, and the mounting seat 2 is fixed on a machine tool. An oil path shaft 13 penetrates through the mounting seat 2 and the cylinder body 1, the oil path shaft 13 extends along the axial direction of the cylinder body 1, and one end, far away from the cylinder body 1, of the oil path shaft 13 is rotatably arranged in the mounting seat 2.

Referring to fig. 2, the oil path shaft 13 is located at the axial center of the end surface of the cylinder body 1, the end of the cylinder body 1 far away from the mounting seat 2 is provided with a liquid outlet 43, the end of the mounting seat 2 far away from the cylinder body 1 is provided with a liquid inlet 23, and the oil path shaft 13 is internally provided with a cooling liquid channel 133 communicating the liquid inlet 23 and the liquid outlet 43.

When the inner wall of the tubular space is machined, cooling liquid is injected into the cooling liquid channel 133 in the oil path shaft 13 from the liquid inlet 23, and is sprayed into the tubular workpiece on the chuck from the liquid outlet 43 through the cooling liquid channel 133, so that the inner wall of the tubular workpiece is cooled and scraps are removed.

Referring to fig. 2, the cylinder body 1 includes a rear cylinder 12 sleeved on the oil path shaft 13, and a front cylinder 11 bolted to the rear cylinder 12, and the liquid outlet 43 is opened on an end surface of the front cylinder 11 facing away from the rear cylinder 12. A piston chamber 3 is formed between the front cylinder 11 and the rear cylinder 12, and an oil path shaft 13 passes through the rear cylinder 12 and enters the piston chamber 3. The oil path shaft 13 in the piston cavity 3 is sleeved with a piston rod 4.

Referring to fig. 2, the piston rod 4 includes a piston disc 41 slidably connected in the piston chamber 3, and a piston tube 42 fixedly connected to the piston disc 41, the piston disc 41 being slidably connected to a circumferential side wall of the oil passage shaft 13, the piston disc 41 being slidable in an axial direction of the oil passage shaft 13. The end of the oil path shaft 13 located in the piston chamber 3 extends into the piston tube 42, and the end of the piston tube 42 remote from the piston disc 41 extends out of the liquid outlet 43.

Referring to fig. 2 and 3, the piston disc 41 divides the piston chamber 3 into a first chamber 31 near the rear cylinder 12 and a second chamber 32 near the front cylinder 11. First draw-in groove 411 has been seted up on the circumference lateral wall of piston disc 41, first draw-in groove 411 is embedded to have a sealing washer one 4111, and a sealing washer one 4111 supports tightly between the inside wall of preceding jar 11 and the tank bottom of first draw-in groove 411.

Referring to fig. 2 and 3, the rear cylinder 12 has a boss 121 extending into the piston chamber 3 and abutting against the end surface of the piston disc 41, and the circumferential side wall of the boss 121 abuts against the inner side wall of the front cylinder 11. The circumferential side wall of the boss 121 is provided with a second clamping groove 412, the second clamping groove 412 is embedded with a second sealing ring 4121, and the second sealing ring 4121 is tightly abutted between the inner side wall of the front cylinder 11 and the bottom of the second clamping groove 412.

Referring to fig. 2 and 3, two seal grooves 413 are formed in the inner side wall of the piston disc 41 along the circumferential direction of the oil path shaft 13, the seal grooves 413 are arranged in parallel on the circumferential side wall of the oil path shaft 13, a seal ring 4131 is embedded in the seal groove 413, and the seal ring 4131 abuts against a space between the outer side wall of the oil path shaft 13 and the inner side wall of the piston disc 41.

Referring to fig. 2, two guide posts 44 are formed on the piston disc 41, the guide posts 44 are screwed into the piston disc 41, and both ends of the guide posts 44 extend into the first chamber 31 and the second chamber 32. The side wall of the front cylinder 11 facing the piston disc 41 and the side wall of the rear cylinder 12 facing the piston disc 41 are provided with guide grooves 441 for sliding the guide posts 44, and the guide posts 44 are symmetrically arranged along the axial direction of the oil path shaft 13.

When the piston disc 41 moves back and forth in the piston cavity 3, the first sealing ring 4111 on the piston disc 41 seals the first cavity 31 and the second cavity 32, the second sealing ring 4121 on the boss 121 seals the threaded bolt connection part of the rear cylinder 12 and the front cylinder 11, and the sealing ring 4131 in the piston disc 41 seals the gap between the oil path shaft 13 and the piston disc 41, so that the sealing performance in the cylinder body 1 is improved; the guide posts 44 slide back and forth in the guide grooves 441 with the movement of the piston disc 41, reducing axial displacement of the piston disc 41 as it moves.

Referring to fig. 2, a first oil path 131 is opened outside the coolant channel 133 in the oil path shaft 13, the first oil path 131 extends along the axial direction of the oil path shaft 13, a first annular groove 211 communicated with the first oil path 131 is opened in the mounting seat 2 along the circumferential direction of the oil path shaft 13, a first oil inlet 21 communicated with the first annular groove 211 is opened on the outer side wall of the mounting seat 2, and one end of the first oil path 131, which is far away from the first oil inlet 21, extends to the end surface of the oil path shaft 13, which is located in the piston cavity 3, and is communicated with the first cavity 31.

Referring to fig. 2 and 4, a second oil passage 132 is opened in the oil passage shaft 13 outside the coolant passage 133, the second oil passage 132 being adjacent to the first oil passage 131, the second oil passage 132 communicating into the second chamber 32 through the rear cylinder 12 and the front cylinder 11 in the axial direction of the oil passage shaft 13. A second annular groove 221 communicated with the second oil path 132 is formed in the mounting seat 2 along the circumferential direction of the oil path shaft 13, and the second annular groove 221 is located between the first annular groove 211 and the rear cylinder 12. A second oil inlet 22 communicated with the second annular groove 221 is formed in the outer side wall of the mounting seat 2, and the second oil inlet 22 is adjacent to the first oil inlet 21.

Referring to fig. 2 and 4, the second oil passage 132 includes an oil passage 1321 communicating with the second annular groove 221, an annular cavity 1322 opened in the rear cylinder 12 and communicating with the oil passage 1321, and an oil guide cavity 1323 opened in the front cylinder 11 and communicating the annular cavity 1322 with the second chamber 32. The oil passage cavity 1321 is located inside the oil passage shaft 13 and adjacent to the first oil passage 131, the annular cavity 1322 is located inside the rear cylinder 12 and arranged along the circumferential direction of the oil passage shaft 13, the oil guide cavity 1323 extends to the annular cavity 1322 along the circumferential side wall of the front cylinder 11, and one end of the oil guide cavity 1323, which is far away from the annular cavity 1322, is communicated from the side wall of the front cylinder 11, which faces the piston disc 41, to the second cavity 32.

Referring to fig. 2 and 4, two rotary bearings 24 are sleeved on the oil path shaft 13 in the mounting base 2, the side wall of the rotary bearing 24, which faces away from the oil path shaft 13, is abutted to the inner side wall of the mounting base 2, the two rotary bearings 24 are arranged side by side along the axial direction of the oil path shaft 13, one rotary bearing 24 is arranged close to the liquid inlet 23, and the other rotary bearing 24 is arranged close to the rear cylinder 12.

Referring to fig. 2 and 4, a liquid passing port 242 is opened on one side of the mounting seat 2, which is opposite to the rear cylinder 12, of the first oil inlet 21 and the second oil inlet 22, and the liquid passing port 242 is located between the liquid inlet 23 and the first oil inlet 21. The mounting seat 2 is provided with a lubricating pipeline 241 communicated with the rotary bearing 24 close to the liquid inlet 23, and the mounting seat 2 is provided with a connecting pipeline 243 communicated with the two rotary bearings 24.

When the piston disc 41 drives the piston tube 42 to move toward the liquid outlet 43, the oil enters the mounting seat 2 from the first oil inlet 21, flows to the first annular groove 211, flows into the first oil passage 131 through the first annular groove 211, and flows out to the first chamber 31 from the rear cylinder 12 toward the side wall of the piston disc 41 along the first oil passage 131. After the first chamber 31 is filled with the oil, the piston disc 41 is pushed to move towards the liquid outlet 43 in the piston chamber 3, so that the first chamber 31 is enlarged, the second chamber 32 is reduced, and the piston disc 41 moves towards the liquid outlet 43.

When the piston disc 41 drives the piston tube 42 to move toward the liquid inlet 23, the oil enters the mounting seat 2 from the second oil inlet 22, flows to the second annular groove 221, and flows into the oil through cavity 1321 through the second annular groove 221. The oil flows into the annular chamber 1322 in the rear cylinder 12 from the oil passage chamber 1321, and flows to the oil guide chamber 1323 in the front cylinder 11 after the annular chamber 1322 is filled. The oil flows from the front cylinder 11 toward the side wall of the piston disc 41 into the second chamber 32 along the oil guide chamber 1323. After the second chamber 32 is filled with the oil, the piston disc 41 is pushed to move towards the liquid inlet 23 in the piston chamber 3, so that the second chamber 32 is increased, the first chamber 31 is decreased, and the piston disc 41 moves towards the liquid inlet 23.

The implementation principle of an inner cooling type rotary oil cylinder in the embodiment of the application is as follows: when the rotary oil cylinder drives the chuck to clamp the inner wall of the tubular workpiece, oil enters the first oil inlet 21, enters the piston cavity 3 through the first oil path 131 to push the piston disc 41 towards the liquid outlet 43, and drives the chuck to clamp the tubular workpiece. When the chuck loosens the tubular workpiece, the oil enters the second oil inlet 22, enters the piston cavity 3 through the second oil passage 132, pushes the piston disc 41 towards the liquid inlet 23, and drives the chuck to loosen the tubular workpiece.

When the inner wall of a tubular workpiece is machined, the main shaft movable cylinder body 1 and the oil way shaft 13 rotate, the mounting base 2 is fixed on a machine tool, and the oil way shaft 13 rotates in the mounting base 2 through the rotating bearing 24. The cooling liquid enters the cooling liquid channel 133 in the oil path shaft 13 from the liquid inlet 23, and is sprayed to the processing position in the tubular workpiece from the liquid outlet 43 through the cooling liquid channel 133, so that the inner wall of the tubular workpiece is cooled and the scraps are removed conveniently.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides an inner cooling formula rotary cylinder, includes cylinder body (1) and mount pad (2), its characterized in that: the cylinder body (1) comprises a front cylinder (11) and a rear cylinder (12), the front cylinder (11) and the rear cylinder (12) are connected through bolts to form a piston cavity (3) between the front cylinder (11) and the rear cylinder (12), a piston rod (4) is connected in the piston cavity (3) in a sliding mode along the axial direction of the cylinder body (1), an oil path shaft (13) is arranged in the cylinder body (1), the oil path shaft (13) is rotatably arranged in the mounting seat (2), a first oil path (131) is arranged in the oil path shaft (13), the first oil path (131) is communicated with the piston cavity (3) close to one side of the rear cylinder (12), a second oil path (132) is further arranged in the oil path shaft (13), the second oil path (132) is communicated with the piston cavity (3) close to one side of the front cylinder (11), a first oil inlet (21) communicated with the first oil path (131) and a second oil path (131) are correspondingly arranged on the mounting seat (2) (132) The piston rod (4) is provided with a liquid outlet (43), the mounting seat (2) is provided with a liquid inlet (23), the oil path shaft (13) penetrates through the piston rod (4), and a cooling liquid channel communicated with the liquid inlet (23) and the liquid outlet (43) is formed in the oil path shaft (13).

2. The internally cooled rotary cylinder of claim 1, wherein: the piston rod (4) comprises a piston disc (41) sliding in the piston cavity (3) and a piston pipe (42) sleeved on the oil path shaft (13), the piston pipe (42) extends out of the front cylinder (11) towards the direction far away from the rear cylinder (12), one end, extending out of the front cylinder (11), of the piston pipe (42) is communicated with the liquid outlet (43), and the piston disc (41) divides the piston cavity (3) into a first cavity (31) communicated with the first oil path (131) and a second cavity (32) communicated with the second oil path (132).

3. The internally cooled rotary cylinder of claim 2, wherein: and a first annular groove (211) communicated with the first oil way (131) and a second annular groove (221) communicated with the second oil way (132) are formed in the mounting seat (2).

4. The internally cooled rotary cylinder of claim 3, wherein: one end, close to the first oil inlet (21), of the first oil path (131) is communicated with the first annular groove (211), and one end, far away from the first oil inlet (21), of the first oil path (131) is communicated with the first cavity (31).

5. The internally cooled rotary cylinder of claim 3, wherein: the second oil circuit (132) comprises an oil through cavity (1321) communicated with the second ring groove (221), an annular cavity (1322) communicated with the oil through cavity (1321) in the rear cylinder (12), an oil guide cavity (1323) communicated with the second cavity (32) in the front cylinder (11), and the oil guide cavity (1323) extends to the annular cavity (1322) along the side wall of the front cylinder (11).

6. The internally cooled rotary cylinder of claim 2, wherein: the cover is equipped with sealing washer one (4111) on the lateral wall of piston dish (41), the confession has been seted up on the lateral wall of piston dish (41) first draw-in groove (411) of sealing washer one (4111) embedding, sealing washer one (4111) support tightly in the inside wall of preceding jar (11) with between the tank bottom of first draw-in groove (411).

7. The internally cooled rotary cylinder of claim 2, wherein: the rear cylinder (12) extends towards the inside of the piston cavity (3) to form a boss (121) which is abutted to the piston disc (41), a second sealing ring (4121) is sleeved on the side wall of the boss (121), a second clamping groove (412) for embedding the second sealing ring (4121) is formed in the side wall of the boss (121), and the second sealing ring (4121) abuts between the inner side wall of the front cylinder (11) and the groove bottom of the second clamping groove (412).

8. The internally cooled rotary cylinder of claim 2, wherein: the oil circuit shaft (13) is characterized in that a plurality of sealing rings (4131) are sleeved on the side wall of the piston disc (41), a sealing groove (413) for the sealing rings (4131) to be embedded is formed in the piston disc (41), and the sealing rings (4131) are abutted between the outer side wall of the oil circuit shaft (13) and the inner side wall of the piston disc (41).

9. The internally cooled rotary cylinder of claim 2, wherein: the piston disc (41) is in threaded connection with a plurality of guide columns (44) along the axial direction of the cylinder body (1), and guide grooves (441) for the guide columns (44) to slide are formed in the inner side walls of the front cylinder (11) and the rear cylinder (12).

10. The internally cooled rotary cylinder of claim 1, wherein: the oil circuit shaft (13) lateral wall with install a plurality of rolling bearing (24) between mount pad (2) inside wall, be equipped with lubricated pipeline (241) of a plurality of rolling bearing (24) of intercommunication on mount pad (2), seted up the intercommunication on mount pad (2) the liquid mouth (242) that lead to of lubricated pipeline (241).