CN108942280B

CN108942280B - Oil pressure chuck with oil leakage prevention ring

Info

Publication number: CN108942280B
Application number: CN201710348435.9A
Authority: CN
Inventors: 吴炫隆
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-05-17
Filing date: 2017-05-17
Publication date: 2020-06-02
Anticipated expiration: 2037-05-17
Also published as: CN108942280A

Abstract

An oil pressure chuck with oil-leakage-stopping rings comprises a base, a shaft seat, a rotating shaft unit, a plurality of oil-leakage-stopping rings and a collet unit. A gap for pressure oil to flow is generated between a first side face of the shaft seat and a second side face of the rotating shaft unit, the oil leakage prevention rings are arranged between the first side face and the second side face and respectively provided with a base wall which spans the gap and extends from the first side face to the second side face, a first annular wall which is connected with the base wall and is fixed on the shaft seat, and a second annular wall which is connected with the base wall and is adjacent to the rotating shaft unit, and the second annular wall can be tightly propped against the rotating shaft unit by the oil braking energy of the pressure oil. When the engine is stopped, the second annular wall generates elastic deformation under the action of pressure oil and achieves better oil-tight effect, and when the engine runs, the second annular wall does not abut against the rotating shaft unit, so that high-temperature friction can be avoided, and the aging of the oil leakage stopping ring can be slowed down.

Description

Oil pressure chuck with oil leakage prevention ring

Technical Field

The present invention relates to a machine tool, and more particularly to an oil pressure cartridge having an oil-retaining ring.

Background

An oil pressure chuck of a conventional machine tool (taiwan patent No. 557239) includes a base, and a fixing base, a sleeve, two bearings, a rotating base, a pulling base, a pull rod, a front shaft cover, a rear shaft cover, a front collet, and a rear collet installed inside the base. When the pressure oil flows through an oil path which can pass through the engine base, the fixed base and the rotating base to brake the brake base, the brake base can tighten or loosen the front collet chuck and the rear collet chuck.

Generally, a gap into which pressure oil can be infiltrated is generated between an outer annular surface of the rotary holder and an inner annular surface of the fixed holder, and a plurality of oil leakage prevention rings are also installed between the outer annular surface of the rotary holder and the inner annular surface of the fixed holder, and have a circular cross-section in a normal state.

When the machine tool is in a stop state and a workpiece is clamped or released by operating the oil pressure chuck, pressure oil is started to be introduced from the oil path and seeps into the gap, ideally, the pressure of the pressure oil is expected to force the oil leakage prevention ring to deform so as to prevent the pressure oil from leaking, when the pressure of the pressure oil is small, the deformation degree of the oil leakage prevention ring is insufficient, or the oil leakage phenomenon is caused, if the oil leakage prevention ring is required to generate enough deformation degree for preventing the oil leakage, the pressure of the pressure oil needs to be increased, but the pressure of the pressure oil is increased, so that the oil leakage can be caused.

Further, if the oil-leakage preventing ring is kept in contact with the rotor even in the operating state in order to prevent leakage, the oil-leakage preventing ring can exhibit a good leakage preventing property without increasing the pressure in the shutdown state. However, this causes the oil-leakage preventing ring to be easily worn out and to be easily degraded due to high temperature caused by continuous friction.

Disclosure of Invention

The invention aims to provide a hydraulic chuck with a leakage-stopping oil ring, which has a simple structure, generates a better leakage-stopping effect when the chuck is stopped, and prevents abrasion during operation.

The invention relates to an oil pressure chuck with oil leakage prevention rings, which is used for clamping at least one workpiece and comprises a base, an axle seat, a rotating shaft unit, a plurality of oil leakage prevention rings and a collet chuck unit, wherein the axle seat is arranged in the base and is provided with a first side surface, the rotating shaft unit extends along an axis, can rotate and is axially arranged in the axle seat and is provided with a second side surface opposite to the first side surface, a gap for pressure oil to flow is formed between the first side surface and the second side surface, the oil leakage prevention rings are arranged between the first side surface and the second side surface and are respectively provided with a base wall which crosses the gap and extends from the first side surface to the second side surface, a first annular wall which is connected with one side of the base walls and is fixed on the axle seat, and a second annular wall which is connected with the other side of the base walls and is adjacent to the rotating shaft unit, the base wall, the first annular wall and the second annular wall jointly define an oil groove capable of communicating the gap, when the machine is stopped, pressure oil which is guided to the oil groove along the gap can drive the second annular wall to swing relative to the first annular wall, the second annular wall can be oil-tight and abut against the rotating shaft unit, the collet chuck unit is sleeved inside the rotating shaft unit, and the workpiece can be tightened or released under the driving of the pressure oil.

The invention relates to an oil pressure chuck with a leakage-stopping oil ring, wherein the shaft seat is also provided with a first oil inlet hole communicated with the first side surface, a second oil inlet hole staggered with the first oil inlet hole, the rotating shaft unit also comprises a main body and a driving wheel seat fixedly arranged on one side of the main body, a cylinder chamber is generated between the main body and the driving wheel seat, the second side surface is arranged on the main body, the main body is also provided with a first oil guide channel communicated between the first oil inlet hole and the cylinder chamber and a second oil guide channel staggered with the first oil guide channel and communicated between the second oil inlet hole and the cylinder chamber, and one end openings of the first oil guide channel and the second oil guide channel communicated with the cylinder chamber are respectively arranged on two sides of the cylinder chamber corresponding to the axis.

The invention relates to an oil pressure chuck with oil leakage prevention rings, wherein one oil leakage prevention ring is respectively arranged on two sides of a first oil guide channel, and one oil leakage prevention ring is respectively arranged on two sides of a second oil guide channel.

The invention relates to an oil pressure chuck with a leakage-stopping oil ring, wherein two leakage-stopping oil rings positioned between a first oil guide channel and a second oil guide channel are connected into a whole.

The invention relates to an oil pressure chuck with a leakage-proof oil ring, wherein a first side surface of a shaft seat and a second side surface of a rotating shaft unit respectively extend along a radial direction vertical to an axis, the shaft seat is also provided with a plurality of first concave grooves which are concavely arranged from the first side surface and are respectively positioned at two sides of a first oil inlet hole and two sides of a second oil inlet hole, two first concave grooves positioned between the first oil inlet hole and the second oil inlet hole are mutually communicated, first ring walls of the leakage-proof oil ring are respectively embedded in the first concave grooves, a main body of the rotating shaft unit is also provided with a plurality of second concave grooves which are concavely arranged from the second side surface and are respectively positioned at two sides of a first oil guide channel and two sides of a second oil guide channel, the two second concave grooves positioned between the first oil guide channel and the second oil guide channel are mutually communicated, second ring walls of the leakage-proof oil ring are respectively sleeved in the second concave grooves, the second concave grooves are respectively defined by a groove bottom surface and a groove side surface connected with the groove bottom surface, the radial width of the second annular wall of the oil leakage stopping ring is smaller than that of the corresponding second groove, and the second annular wall can respectively swing in the second groove under the braking of the pressure oil, so that the second annular wall can be oil-tight and is abutted against the side surface of the corresponding groove.

The oil pressure chuck with the oil leakage preventing ring further comprises a first check valve which is arranged in the main body of the rotating shaft unit and is arranged on the first oil guide passage, allows pressure oil to be guided to the cylinder chamber from the first oil inlet hole in a one-way mode, and can prevent the pressure oil in the cylinder chamber from flowing back to the first oil inlet hole.

The oil pressure chuck with the oil leakage preventing ring further comprises a second check valve which is arranged in the main body of the rotating shaft unit and is arranged on the second oil guide passage, allows pressure oil to be guided to the cylinder chamber from the second oil inlet hole in a one-way mode through the second check valve, and can prevent the pressure oil in the cylinder chamber from flowing back to the second oil inlet hole.

The present invention relates to an oil pressure cartridge having a oil-retaining ring, a first thickness of a first annular wall of the oil-retaining ring perpendicular to the radial direction is larger than a second thickness of a second annular wall of the oil-retaining ring perpendicular to the radial direction.

The invention has the beneficial effects that: by utilizing the structural design of the oil leakage prevention ring, when the rotating shaft unit is in a static state, the second annular wall can be tightly abutted against the rotating shaft unit when being dragged by the pressure oil, and when the rotating shaft unit operates, the second annular wall and the rotating shaft unit are in micro contact, so that abrasion and high heat generation caused by friction can be avoided.

Drawings

FIG. 1 is a sectional view of an oil pressure cartridge having an oil control ring according to an embodiment of the present invention, shown in an operating state;

FIG. 2 is an enlarged partial schematic view of FIG. 1;

FIG. 3 is an enlarged partial schematic view of FIG. 2;

FIG. 4 is an operational view of the embodiment illustrating a collet unit being hydraulically actuated to release a workpiece during a shutdown;

FIG. 5 is an enlarged partial schematic view of FIG. 4;

FIG. 6 is another operational schematic of the embodiment illustrating the collet unit being hydraulically actuated to tighten the workpiece during a shutdown;

fig. 7 is an enlarged partial schematic view of fig. 6.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

Referring to fig. 1, 2 and 3, an embodiment of an oil chuck with oil-leakage prevention rings according to the present invention is used for clamping at least one workpiece (not shown), and the oil chuck includes a base 10, a shaft seat 20, a rotating shaft unit 30, a plurality of oil-leakage prevention rings 40, a collet unit 50, two bearings 60 respectively sleeved between the shaft seat 20 and the rotating shaft unit 30, a first check valve 70 and a second check valve 80.

The base 10 has an inner side 11 defining an inner hole 111, an outer side 12 opposite to the inner side 11, a first guide hole 13 communicating from the outer side 12 to the inner side 11, and a second guide hole 14 disposed in a staggered manner with the first guide hole 13 and communicating from the inner side 11 to the outer side 12, wherein the inner hole 111 is disposed along an axis L.

The shaft seat 20 is fixed and installed in the inner hole 111 of the base 10, and has a first side surface 21 perpendicular to the inner side surface 11 and extending along a radial direction Y perpendicular to the axis L, a first oil inlet hole 22 communicating with the first guide hole 13 from the first side surface 21, a second oil inlet hole 23 disposed in a staggered manner with the first oil inlet hole 22 and communicating between the first side surface 21 and the second guide hole 14, a plurality of first grooves 24 recessed from the first side surface 21 and respectively located on both sides of the first oil inlet hole 22 and both sides of the second oil inlet hole 23 along the radial direction Y, and two first grooves 24 located between the first oil inlet hole 22 and the second oil inlet hole 23. The first groove 24 is circular.

The rotating shaft unit 30 extends along the axis L, can rotate, is axially disposed inside the shaft seat 20, and includes a main body 301 and a driving wheel seat 302 fixedly disposed on one side of the main body 301, and a cylinder chamber 303 is formed between the main body 301 and the driving wheel seat 302. The main body 301 has a second side surface 31 opposite to the first side surface 21 and extending along the radial direction Y, a first oil guiding channel 32 communicating between the first oil inlet hole 22 and the cylinder chamber 303, a second oil guiding channel 33 (see fig. 6 and 7 in combination) staggered from the first oil guiding channel 32 and communicating between the second oil inlet hole 23 and the cylinder chamber 303, a plurality of second grooves 34 recessed from the second side surface 31 and respectively located on both sides of the first oil guiding channel 32 and both sides of the second oil guiding channel 33 along the radial direction Y, two second grooves 34 located between the first oil guiding channel 32 and the second oil guiding channel 33 and communicating with each other, each of the second grooves 34 is defined by a groove bottom surface 341 and a groove side surface 342 intersecting and joining to the groove bottom surface 341, and the second grooves 34 are circular. The port of the first oil guide passage 32 communicating with the cylinder chamber 303 and the port of the second oil guide passage 33 communicating with the cylinder chamber 303 are provided on both sides of the cylinder chamber 303 corresponding to the axis L. And a gap 90 for the pressure oil to flow through is formed between the first side surface 21 and the second side surface 31, and the gap 90 is communicated with the first oil inlet hole 22, the second oil inlet hole 23, the first oil guide passage 32 and the second oil guide passage 33. In addition, a first oil return passage (not shown) is provided between the cylinder chamber 303 and the second oil guide passage 33 corresponding to the first oil guide passage 32, and a second oil return passage (not shown) is also provided between the cylinder chamber 303 and the first oil guide passage 32 corresponding to the second oil guide passage 33.

As shown in fig. 3, 5, and 7, the oil-leakage stopping rings 40 are circular, and are respectively installed between the first side surface 21 and the second side surface 31, and each of the oil-leakage stopping rings has a base wall 41 crossing the gap 90 and extending from the first side surface 21 to the second side surface 31, a first annular wall 42 connected to one side of the base wall 41 and fixed to the shaft seat 20, and a second annular wall 43 connected to the other side of the base wall 41 and adjacent to the rotating shaft unit 30, the base wall 41, the first annular wall 42, and the second annular wall 43 together define an oil groove 44 capable of communicating with the gap 90, the first annular walls 42 are respectively embedded and fixed in the first grooves 24, the second annular walls 43 are respectively sleeved in the second grooves 34, the width of the second annular wall 43 corresponding to the radial direction Y is smaller than the width of the corresponding second groove 34, and a first thickness t1 of the first annular wall 42 perpendicular to the radial direction Y is larger than a second thickness of the second annular wall 43 perpendicular to the radial direction Y t 2. In addition, in the present embodiment, two oil leakage prevention rings 40 are respectively installed on both sides of the port of the first oil guide passage 32 near the second side surface 31, one oil leakage prevention ring 40 is respectively installed on both sides of the port of the second oil guide passage 33 near the second side surface 31, the two oil leakage prevention rings 40 located between the first oil guide passage 32 and the second oil guide passage 33 are integrally connected, the two integrally connected oil leakage prevention rings 40 further respectively have a tip end surface 45 opposite to the oil groove 44 and a concave arc surface 46 concavely formed by the tip end surface 45, the concave arc surfaces 46 of the two integrally connected oil leakage prevention rings 40 are connected in a semicircular arc shape, and the area of the tip end surface 45 can be reduced by the arrangement of the concave arc surfaces 46. In this embodiment, the oil-stopping rings on both sides of the first oil inlet hole 22 are respectively the first outer ring 411 and the first middle ring 412, the oil-stopping rings on both sides of the second oil inlet hole 23 are respectively the second middle ring 421 and the second inner ring 422, and the first middle ring 412 and the second middle ring 421 are integrally connected.

The collet unit 50 has a brake seat 51 sleeved in the cylinder chamber 303, the collet unit 50 and the main body 301 can be respectively matched with a shaft cover, a collet and a pull rod (not shown in the figure, the structure and action principle of the cooperation of the collet unit 50 and the main body 301 with the shaft cover, the collet and the pull rod are the prior art, as disclosed in taiwan patent No. I425997, which is not described herein more), the brake seat 51 can be driven by pressure oil to link the shaft cover, the collet and the pull rod, and can tighten or loosen the workpiece.

The first check valve 70 is installed inside the main body 301 of the rotating shaft unit 30 and on the first oil guide passage 32, and the first check valve 70 allows the pressure oil to be guided from the first oil inlet hole 22 toward the cylinder chamber 303 in one direction and prevents the pressure oil in the cylinder chamber 303 from flowing backward toward the first oil inlet hole 22.

The second check valve 80 is installed inside the main body 301 of the rotating shaft unit 30 and on the second oil guide passage 33, and the second check valve 80 allows the pressure oil to be guided from the second oil inlet hole 23 toward the cylinder chamber 303 in one direction and prevents the pressure oil in the cylinder chamber 303 from flowing backward toward the second oil inlet hole 23. (the structure and operation principle of the first check valve 70 and the second check valve 80 are the prior art, such as those disclosed in Taiwan patent Nos. I425997, I535959, etc., which will not be described further herein)

As shown in fig. 1, 2 and 3, since the hydraulic cartridge is in one operating state, the pressure oil is not introduced from the first and

second guide holes

13 and 14, and the oil-leakage preventing ring 40 is not affected by the pressure oil, the first outer ring 411 and the first middle ring 412 on both sides of the first oil inlet hole 22, the second middle ring 421 and the second inner ring 422 on both sides of the second oil inlet hole 23 are kept in a stationary state, the second ring wall 43 is not elastically biased with respect to the first ring wall 42, a gap is left between the second ring wall 43 and the corresponding groove side surface 342, and when the driving wheel base 302 is driven by the external force to rotate the entire rotating shaft unit 30 together with the collet unit 50 and the workpiece, and the workpiece is machined, the second ring wall 43 of the oil-leakage preventing ring 40 is not in contact with the groove bottom surface 341 of the second groove 34, The groove side 342 generates excessive friction, which can prevent friction and temperature rise, further slow down aging and prolong service life.

As shown in fig. 4 and 5, when the pressure oil (as shown by the dotted arrow) is introduced from the first guide hole 13, passes through the first oil inlet hole 22, the gap 90, the first oil guide passage 32, and pushes the first check valve 70 to open, the pressure oil can be smoothly introduced into the cylinder chamber 303, the pressure oil will push the stopper seat 51 to move towards the right side of fig. 4, so that the workpiece (not shown) can be released, and the workpiece can be replaced. In this state, as shown in fig. 5, while the pressure oil is introduced from the first oil inlet hole 22 to the gap 90, the pressure oil also seeps into the oil grooves 44 of the oil-leakage preventing ring 40 located at both sides of the first oil inlet hole 22 along the radial direction Y, and the pressure oil elastically biases the second ring wall 43 with a smaller thickness toward the corresponding groove side surface 342 (at this time, the first outer ring 411 and the first middle ring 412 located at both sides of the first oil inlet hole 22 are biased by the pressure oil, and the second middle ring 421 is also biased along with the first middle ring 412), so that the second ring wall 43 can be tightly abutted against the corresponding groove bottom surface 341 and the groove side surface 342, and a leakage preventing effect is generated, so that the pressure oil can be prevented from flowing back to the second oil inlet hole 23 and the second oil guiding passage 33. Meanwhile, the backward pressure oil originally existing in the right space of the stopper seat 51 and having a pressure lower than the oil pressure in the first oil inlet hole 22 and the first oil guide passage 32 flows back along the first oil return passage (not shown) (see the arrow of the imaginary line in fig. 5), and the backward pressure oil having a smaller pressure also stops the oil leakage prevention ring 40, such as the second inner ring 422 (see the arrow of the imaginary line in fig. 5), located on one side of the second oil inlet hole 23, so that the pressure oil can be prevented from leaking along the gap 90. When the pressure oil stops being introduced from the first guide hole 13, the first check valve 70 returns to the closed state and cuts off the first oil introduction passage 32, thereby preventing the pressure oil of the cylinder chamber 303 from flowing backward toward the first oil inlet hole 22. The second annular wall 43 of the oil control ring 40 located on both sides of the first oil inlet hole 22 is not subjected to the pressure oil pressure, and the state shown in fig. 5 is returned to the state shown in fig. 3 by the material action thereof.

As shown in fig. 6 and 7, when the pressure oil (indicated by the dotted arrow) is introduced from the second guide hole 14, passes through the second oil inlet hole 23, the gap 90, the second oil guide passage 33, and pushes the second check valve 80 to open, the pressure oil can be smoothly introduced into the cylinder chamber 303, the pressure oil pushes the stopper seat 51 to move to the left side of fig. 6 and 7, the workpiece (not shown) can be clamped, and the workpiece can be ready to be machined. In this state, the pressure oil is introduced from the second oil inlet hole 23 into the gap 90, and at the same time, the pressure oil also seeps into the oil grooves 44 of the oil-leakage-stopping rings 40 located at both sides of the second oil inlet hole 23 along the radial direction Y, and the pressure oil drags the second ring wall 43 with smaller thickness to elastically bias toward the corresponding groove side surface 342 (at this time, the second inner ring 422 and the second middle ring 421 at both sides of the second oil inlet hole 23 are dragged by the pressure oil, and the first middle ring 412 also biases along with the second middle ring 421), so that the second ring wall 43 can be tightly abutted against the corresponding groove bottom surface 341 and the groove side surface 342, and a leakage-stopping effect is generated, and therefore, the pressure oil can be prevented from flowing back toward the first oil inlet hole 22 and the first oil-guiding passage 32. Meanwhile, the back pressure oil originally existing in the left space of the stopper seat 51 and having a pressure lower than the oil pressure in the second oil inlet hole 23 and the second oil guide passage 33 flows back along the second oil return passage (not shown) (see the arrow of the phantom line in fig. 7), and the back pressure oil having a smaller pressure also stops the oil leakage prevention ring 40, such as the first outer ring 411 (see the arrow of the phantom line in fig. 7), located on one side of the first oil inlet hole 22, so that the pressure oil can be prevented from leaking along the gap 90. When the pressure oil stops being introduced again through the second guide hole 14, the second check valve 80 returns to the closed state and cuts off the second oil guide passage 33, thereby preventing the pressure oil of the cylinder chamber 303 from flowing backward toward the second oil inlet hole 23. The second annular wall 43 of the oil control ring 40 located on both sides of the second oil inlet hole 23 is not subjected to the pressure oil pressure, and the state of fig. 7 is returned to the state of fig. 3 by the material action thereof.

Therefore, in the hydraulic chuck according to the present invention, when the rotary shaft unit is in a stationary state (stopped state), the second annular wall 43 of the oil control ring 40 is actuated to swing in the second groove 34 with respect to the first annular wall 42 by the pressure of the pressure oil that is guided to the oil groove 44 along the gap 90, that is, to elastically bias toward the corresponding groove bottom surface 341 and groove side surface 342, so that the second annular wall 43 of the oil control ring 40 abuts against the corresponding groove side surface 342, and a leakage prevention effect is produced between the rotary shaft unit 30, and the second annular wall 43 of the oil control ring 40 and the rotary shaft unit 30 can be oil-tightly sealed without increasing the pressure of the pressure oil. When the shaft unit 30 is in operation, there is no excessive friction between the second annular wall 43 and the shaft unit 30 to cause high temperature, so as to reduce wear and aging.

In addition, the two oil-leakage preventing rings 40 integrally connected between the first oil-guiding passage 32 and the second oil-guiding passage 33 are connected by the concave arc surface 46 in a semicircular arc shape, so that the area of the end surface 45 can be reduced, and the second annular wall 43 can be more flexibly moved elastically.

In summary, the hydraulic chuck with oil-leakage-stopping ring of the present invention has simple structure, easy manufacture and assembly, and can achieve the object of the present invention.

Claims

1. The utility model provides an oil pressure chuck with leak-stopping oil ring for a centre gripping at least work piece, this oil pressure chuck contains a base, an axle bed, a pivot unit, several leak-stopping oil ring and a collet chuck unit, this axle bed is installed in this base inside and has a first side, this pivot unit extends along an axis and can rotate and the axle is located inside this axle bed and has a second side for this first side, produce a gap that can supply pressure oil circulation between this first side and this second side, inside this pivot unit was located to this collet chuck unit cover, it can tighten or loosen and release to this work piece to receive the drive of pressure oil, its characterized in that:

the oil leakage stopping rings are arranged between the first side face and the second side face and respectively provided with a base wall which crosses the gap and extends from the first side face to the second side face, a first annular wall which is connected to one side of the base wall and is fixed on the shaft seat, and a second annular wall which is connected to the other side of the base wall and is adjacent to the rotating shaft unit, wherein the base wall, the first annular wall and the second annular wall jointly define an oil groove which can be communicated with the gap, when the machine is stopped, pressure oil which is guided to the oil groove along the gap can brake the second annular wall to swing relative to the first annular wall, and the second annular wall can be oil-tight and is abutted to the rotating shaft unit.

2. The oil pressure cartridge having a oil control ring according to claim 1, characterized in that: the shaft seat is also provided with a first oil inlet communicated with the first side surface, a second oil inlet arranged in a staggered manner with the first oil inlet, the rotating shaft unit further comprises a main body and a driving wheel seat fixedly arranged on one side of the main body, a cylinder chamber is formed between the main body and the driving wheel seat, the second side surface is arranged on the main body, the main body is also provided with a first oil guide channel communicated between the first oil inlet and the cylinder chamber and a second oil guide channel arranged in a staggered manner with the first oil guide channel and communicated between the second oil inlet and the cylinder chamber, and one end opening of the first oil guide channel and one end opening of the second oil guide channel communicated with the cylinder chamber are respectively arranged on two sides of the cylinder chamber corresponding to the axis.

3. The oil pressure cartridge having a oil control ring according to claim 2, characterized in that: two sides of the first oil guide channel are respectively provided with one oil leakage prevention ring, and two sides of the second oil guide channel are respectively provided with one oil leakage prevention ring.

4. The oil pressure cartridge having a oil control ring according to claim 3, characterized in that: and two oil leakage prevention rings positioned between the first oil guide channel and the second oil guide channel are connected into a whole.

5. The oil pressure cartridge having a oil control ring according to claim 4, characterized in that: the first side surface of the shaft seat and the second side surface of the rotating shaft unit respectively extend along a radial direction vertical to the axis, the shaft seat is also provided with a plurality of first concave grooves which are concavely arranged from the first side surface and are respectively positioned at two sides of the first oil inlet hole and two sides of the second oil inlet hole, the two first concave grooves positioned between the first oil inlet hole and the second oil inlet hole are mutually communicated, the first ring wall of the oil leakage preventing ring is respectively embedded and fixed in the first concave grooves, the main body of the rotating shaft unit is also provided with a plurality of second concave grooves which are concavely arranged from the second side surface and are respectively positioned at two sides of the first oil guiding passage and two sides of the second oil guiding passage, the two second concave grooves positioned between the first oil guiding passage and the second oil guiding passage are mutually communicated, the second ring wall of the oil leakage preventing ring is respectively sleeved in the second concave grooves, and the second concave grooves are respectively defined by a groove bottom surface and a groove side surface which is intersected and connected with the groove bottom surface, the radial width of the second annular wall of the oil leakage stopping ring is smaller than that of the corresponding second groove, and the second annular wall can respectively swing in the second groove under the braking of the pressure oil, so that the second annular wall can be oil-tight and is abutted against the side surface of the corresponding groove.

6. The oil pressure cartridge having a oil control ring according to claim 5, characterized in that: the oil pressure chuck also comprises a first check valve which is arranged in the main body of the rotating shaft unit and is arranged on the first oil guide passage, the first check valve allows pressure oil to be guided to the cylinder chamber from the first oil inlet hole in a one-way mode, and the pressure oil in the cylinder chamber can be prevented from flowing back to the first oil inlet hole.

7. The oil pressure cartridge having a oil control ring according to claim 6, characterized in that: the oil pressure chuck also comprises a second check valve which is arranged in the main body of the rotating shaft unit and is arranged on the second oil guide passage, the second check valve allows pressure oil to be guided to the cylinder chamber from the second oil inlet hole in a one-way mode, and the pressure oil in the cylinder chamber can be prevented from flowing back to the second oil inlet hole.

8. The oil pressure cartridge having a leakage preventing oil ring according to any one of claims 1 to 7, characterized in that: a first thickness of the first annular wall of the oil slinger perpendicular to the radial direction is larger than a second thickness of the second annular wall perpendicular to the radial direction.