CN211463267U

CN211463267U - Cone crusher

Info

Publication number: CN211463267U
Application number: CN201921199639.1U
Authority: CN
Inventors: 黄敏龙
Original assignee: HANGZHOU SHANHU MACHINERY CO LTD
Current assignee: HANGZHOU SHANHU MACHINERY CO LTD
Priority date: 2019-07-29
Filing date: 2019-07-29
Publication date: 2020-09-11
Anticipated expiration: 2029-07-29

Abstract

The utility model discloses a cone crusher, which comprises a transmission mechanism, a frame and a buffer device, wherein the buffer device comprises a first arc sheet and a second arc sheet which are connected with each other to form a circular ring, a fixed plate arranged at the inner sides of the first arc sheet and the second arc sheet and an oil through hole positioned above the fixed plate; side plates are arranged at two ends of the first arc sheet, an intermediate plate is arranged between the side plates, and a first slot is formed between the intermediate plate and the side plates; the two ends of the second arc sheet are provided with inserting plates capable of being inserted into the first slots and intermediate slots for inserting the intermediate plates, wherein the intermediate slots are formed between the inserting plates. Can prevent pressure bush displacement is too big, utilizes curb plate, intermediate lamella, picture peg to reduce the vibration sense that device eccentric motion produced, and utilizes the oil through hole can be so that the inside oil piping system of device leads to more in the same direction as, and lubricating oil spreads rapider and even more, improves the lubricated effect of device.

Description

Cone crusher

Technical Field

The utility model relates to a cone crusher belongs to broken field.

Background

A cone crusher is a crushing machine suitable for raw materials in the industries of metallurgy, building, road building, chemistry and silicate. According to the different crushing principles and the different sizes of product particles, the products are divided into a plurality of models. The crusher is widely applied to various departments such as mines, smelting, building materials, highways, railways, water conservancy, chemical industry and the like.

Notice No. CN205340893U discloses a pressure liner assembly and vibrations cone crusher for shaking cone crusher, includes: a pressure liner and a pressure liner base; the pressure bushing is arranged on the pressure bushing base and is provided with a first lubricating channel; the pressure bushing base is provided with a second lubricating oil channel; one end of the first lubricating channel is communicated with one end of the second lubricating channel, and the other end of the first lubricating channel is positioned on the upper surface of the pressure lining; one end of the second lubricating oil channel is communicated with a pressure oil port of the vibration cone crusher, and the other end of the second lubricating oil channel is communicated with the first lubricating channel of the pressure lining; originally, a metal ring is arranged outside a pressure bushing and a pressure bushing base, when the device works, the pressure bushing can displace with a movable cone along with the vibration of the device, and after a long time, abrasion of different degrees can be caused on the upper surface and the lower surface of the pressure bushing and the contact surfaces of the pressure bushing base and the movable cone, and after abrasion, the friction force between the pressure bushing and the pressure bushing base and the movable cone is reduced, so that the device shakes violently, and the normal operation of the device is influenced; and the original lubricating oil path system is not perfect enough and can not enter the space between the pressure bushing and the movable cone for lubrication, so that the service life of the device can be greatly reduced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems existing in the prior art, an object of the utility model is to provide a cone crusher, through a plurality of first circular arc piece and the second circular arc piece that form the ring through the mutual gomphosis of an elasticity gomphosis structure for the device can utilize this buffer to cushion when using, reaches the effect that reduces the device vibrations, increases the life of device simultaneously.

The utility model relates to a cone crusher, which comprises a frame; the driving gear is arranged on the rack; the movable cone is eccentrically and rotatably arranged on the rack; the pressure bushing is arranged between the frame and the movable cone; a pressure liner base disposed between the frame and the pressure liner; a buffer device is arranged between the movable cone and the pressure lining base and is positioned at the outer side of the pressure lining; the buffer device comprises a plurality of first arc sheets and second arc sheets which are mutually embedded through an elastic embedding structure to form a circular ring, and the buffer device is fixedly connected with the pressure lining base through a fixing plate.

So set up, structurally, first circular arc piece and second circular arc piece interconnect form the ring form pressure bush with when relative displacement takes place for the pressure bush base, the ring form of formation can prevent the pressure bush displacement is too big, avoids producing great dislocation between pressure bush and pressure bush base, the dynamic cone to reduce the sense of shaking that device eccentric motion produced, and utilize the oil through hole can be so that the inside oil piping system of device leads to in the same direction as more, and more rapidly and even that lubricating oil spreads, improves the lubricated effect of device.

Specifically, the method comprises the following steps: the elastic embedding structure comprises two side plates arranged at two ends of the first arc piece and a middle plate between the two side plates, and a first slot is formed between the middle plate and the two side plates; and the two ends of the second arc sheet are provided with inserting plates capable of being inserted into the first slots and intermediate slots for inserting the intermediate plates.

Further: the side plates and the middle plate are vertically inserted into the middle groove, and the inserting plate is inserted into the first inserting groove, so that the elastic embedding structure formed by the sequential butt joint has impact resistance, the defect of overlarge displacement distance caused by the slipping of the pressure bush can be effectively prevented, and the vibration of the device during working is reduced;

and it is within the skill of the art that there are various ways of elastic engagement based on the specific configuration of the present invention, such as engagement with a horizontal insertion of the insert plate, pressure engagement of the liner, etc.

Further: the first arc sheet and the second arc sheet are made of hard metal, and the side plates, the middle plate and the inserting plate are made of hard elastic plastic. The hard material can be high manganese steel series, chromium cast iron, wear-resistant alloy steel and the like, has stronger hardness, can impact the first arc sheet and the second arc sheet when the pressure lining slides too fast, and can prolong the service life of the element due to the high hardness; the hard elastic plastic can be synthetic rubber, synthetic resin and the like, when the pressure bushing impacts, the impact force can be absorbed by utilizing the elastic potential energy of the pressure bushing, and part of the potential energy is returned to the pressure bushing, so that the pressure bushing can work more stably

Further: a pressure lining base is arranged on the inner side of the buffer device, a first through hole and a mounting groove for communicating the outer side of the pressure lining base with the first through hole are formed in the pressure lining base, and a first stress surface is arranged on the pressure lining base; and a pressure bushing is arranged above the pressure bushing base, and a second through hole which is coincided with the central shaft of the first through hole is arranged in the pressure bushing. The first through hole is aligned with the second through hole, so that lubricating oil can enter the second through hole from the first through hole, the upper end face of the pressure bushing is guaranteed to be provided with the lubricating oil, and relative sliding between the pressure bushing and the movable cone is facilitated.

Further: the fixed plate is embedded in the mounting groove, the fixed plate is in interference connection with the mounting groove, one end of the fixed plate is provided with a certain radian, and the radian is the same as the radian of the first through hole. The fixing plate can be clamped on the pressure bushing base more stably and conveniently by interference connection; the radian can ensure that the first through hole is unobstructed when the fixing plate is fixed with the pressure lining base.

Further: a friction ring is arranged on the movable cone, and a sealing element is arranged between the movable cone and the pressure lining base; the sealing element comprises a friction surface which is in parallel contact with the friction ring, a sealing ring which is embedded in the sealing element and is in sealing connection with the outer side of the pressure lining base, and a fixing pin which is used for fixing the sealing element and the pressure lining base; when the movable cone and the sealing piece move relatively, a sealed space is formed inside the device by utilizing the sufficient contact between the friction surface of the sealing piece and the friction ring and the sealing ring, so that external dust is prevented from entering the device, and the service life of the device is prolonged.

Further: the pressure bushing is fixedly connected with the pressure bushing base, and the buffer device is connected with the pressure bushing through a gap. Through fixed connection, can prevent to a certain extent that to take place relative slip between pressure bush and the bush base, do through the gap connection pressure bush provides buffer distance, in order to avoid damaging buffer.

Further: the transmission mechanism is fixed on the rack; the driving gear is connected with the transmission mechanism in a tooth-shaped meshing manner, the driving gear is sleeved on the outer side of the eccentric sleeve, a main shaft is installed in the eccentric sleeve, and an oil through pipe, a first side pipe and a second side pipe are arranged in the main shaft; and one end of the oil through pipe is connected with an oil inlet pipe positioned on the rack, and the first side pipe is communicated with the oil through pipe and the inner space of the movable cone body and the second side pipe is communicated with the inner space of the oil through pipe and the inner space of the eccentric sleeve. One part of lubricating oil entering from the oil inlet pipe enters the movable cone through the first side pipe, one part of the lubricating oil enters the eccentric sleeve through the second side pipe, and the lubricating oil can enter the space between the pressure bushing and the pressure bushing base through the first through hole, so that the lubricating oil is accelerated to enter the sealing element through the oil through hole and enter the space between the pressure bushing and the movable cone through the second through hole, and the sufficient smoothness of the lubricating oil in the working process of the device is ensured.

The utility model has the advantages that:

first circular arc piece and second circular arc piece interconnect form the ring form, when relative displacement takes place for pressure bush and pressure bush base, the ring form of formation can prevent that pressure bush displacement is too big, avoid pressure bush and pressure bush base, produce great dislocation between the dynamic cone, thereby reduce the vibration that the device eccentric motion produced, and utilize and install at first circular arc piece, the oil through hole in the second circular arc piece can be so that the inside oil piping system of device leads to more in the same direction as, more rapidly and evenly of lubricating oil diffusion, improve the lubricated effect of device.

Drawings

For ease of illustration, the invention is described in detail by the following detailed description and accompanying drawings.

FIG. 1 is a three-dimensional structure of the present invention;

FIG. 2 is a cross-sectional view of the present invention

FIG. 3 is a partial enlarged view of the present invention;

FIG. 4 is a sectional view of the internal structure of the present invention;

FIG. 5 is a view of a pressure bushing base according to the present invention;

FIG. 6 is an exploded view of the pressure liner of the present invention;

fig. 7 is a cross-sectional view taken along line a-a of the present invention;

fig. 8 is a part diagram of the first arc piece and the second arc piece of the present invention;

fig. 9 is a part diagram of the movable cone of the present invention.

Description of reference numerals:

1. a transmission mechanism; 2. a frame; 3. a feed inlet; 4. a buffer device; 401. a first arc piece; 402. a second arc piece; 403. a fixing plate; 404. an oil through hole; 4011. a side plate; 4012. a middle plate; 4013. a first slot; 4021. inserting plates; 4022. an intermediate tank; 5. an oil inlet pipe; 6. a main shaft; 601. an oil pipe is communicated; 602. A first side tube; 603. a second side tube; 7. an eccentric sleeve; 8. a pressure liner base; 801. a first through hole; 802. mounting grooves; 9. a seal member; 901. a friction surface; 902. a seal ring; 903. a fixing pin; 10. a pressure liner; 1001. a second through hole; 11. a movable cone; 1101. a friction ring; 12. the gears are driven.

Detailed Description

Example 1

As shown in fig. 1 to 9, the following technical solutions are adopted in the present embodiment: a transmission mechanism 1 is installed on one side of the frame 2, a feed port 3 is arranged at the upper end of the whole frame 2, and the feed port 3 is used for blanking; the transmission mechanism 1 is engaged with the eccentric sleeve 7 in a tooth form, the transmission mechanism 1 can drive the eccentric sleeve 7 to do eccentric motion when working, the main shaft 6 is arranged in the eccentric sleeve 7, and the eccentric sleeve 7 drives the main shaft 6 to make the main shaft 6 do eccentric motion; the movable cone 11 is sleeved on the main shaft 6 and moves along with the main shaft 6; the pressure bushing 10 is arranged between the frame 2 and the movable cone 11; a pressure lining base 8 is arranged between the frame 2 and the pressure lining 10; and a buffer device 4 is arranged between the movable cone 11 and the pressure lining base 8, and the buffer device 4 is positioned at the outer side of the pressure lining 10; the buffer device 4 includes a plurality of first arc pieces 401 and second arc pieces 402 which are engaged with each other by an elastic engagement structure to form a circular ring. First circular arc piece 401 and second circular arc piece 402 interconnect form the ring form, when pressure bush 10 and pressure bush base 8 take place relative displacement, the ring form of formation can prevent that pressure bush 10 displacement is too big, avoid producing great dislocation between pressure bush 10 and pressure bush base 8, the dynamic cone 11, thereby reduce the vibration sense that device eccentric motion produced, and utilize oil through hole 404 can make the inside oil piping system of device more smooth and easy, more rapidly and even that lubricating oil spreads, improve the lubricated effect of device.

As shown in fig. 6 and 7: the elastic embedding structure comprises two side plates 4011 arranged at two ends of the first arc piece 401 and a middle plate 4012 between the two side plates 4011, and a first slot 4013 is formed between the middle plate 4012 and the two side plates 4011; an inserting plate 4021 capable of being inserted into the first inserting groove 4013 and an intermediate groove 4022 for inserting the intermediate plate 4012 are arranged at two ends of the second arc piece 402. The side plate 4011 and the middle plate 4012 are vertically inserted into the middle groove 4022, and the inserting plate 4021 is inserted into the first inserting groove 4013, so that the elastic embedding structure formed by the sequential butt joint has impact resistance, the defect of overlarge displacement distance caused by the slipping of the pressure bushing 10 can be effectively prevented, and the vibration of the device during working is reduced; the first arc piece 401 and the second arc piece 402 are made of hard metal, and the side plate 4011, the middle plate 4012 and the insert plate 4021 are made of hard elastic plastic. The hard material can be high manganese steel series, chromium cast iron, wear-resistant alloy steel and the like, has high hardness, can impact the first arc piece 401 and the second arc piece 402 when the pressure bushing 10 slides too fast, and can prolong the service life of the element due to the high hardness; the hard elastic plastic may be synthetic rubber, synthetic resin, or the like, and when the pressure bushing 10 impacts, the elastic potential energy of the hard elastic plastic can be used to absorb the impact force and return a part of the potential energy to the pressure bushing 10, so that the pressure bushing 10 can work more stably

As shown in fig. 3, 4, 6 and 8: a transmission mechanism 1 is arranged on one side of the frame 2, the transmission mechanism 1 is meshed with an eccentric sleeve 7 in a tooth form, the transmission mechanism 1 can drive the eccentric sleeve 7 to do eccentric motion when working, a main shaft 6 is arranged in the eccentric sleeve 7, and the eccentric sleeve 7 drives the main shaft 6 to make the main shaft 6 do eccentric motion; the movable cone 11 is sleeved on the main shaft 6 and moves along with the main shaft 6; the pressure bushing 10 is arranged between the frame 2 and the movable cone 11; a pressure lining base 8 is arranged between the frame 2 and the pressure lining 10; and a buffer device 4 is arranged between the movable cone 11 and the pressure lining base 8, and the buffer device 4 is positioned at the outer side of the pressure lining 10; the buffer device 4 includes a plurality of first arc pieces 401 and second arc pieces 402 which are engaged with each other by an elastic engagement structure to form a circular ring. A pressure bushing base 8 is arranged on the inner side of the buffer device 4, a first through hole 801 is arranged in the pressure bushing base 8, and an installation groove 802 for communicating the outer side of the pressure bushing base 8 with the first through hole 801 is arranged, and a first stress surface is arranged on the pressure bushing base 8; a pressure bushing 10 is arranged above the pressure bushing base 8, and a second through hole 1001 which is overlapped with the central axis of the first through hole 801 is arranged in the pressure bushing 10. The first through hole 801 is aligned with the second through hole 1001, so that lubricating oil can enter the second through hole 1001 from the first through hole 801, the upper end face of the pressure bushing 10 is ensured to be provided with the lubricating oil, and relative sliding between the pressure bushing 10 and the movable cone 11 is facilitated.

As shown in fig. 5, 6 and 7: the fixing plate 403 is embedded in the mounting groove 802, the fixing plate 403 is in interference connection with the mounting groove 802, and one end of the fixing plate 403 has a certain radian, which is the same as the radian of the first through hole 801. The fixing plate 403 can be clamped on the pressure bush base 8 more stably and conveniently by interference connection; this curvature may ensure that the first through hole 801 is unobstructed while the fixing plate 403 is fixed to the pressure liner base 8.

As shown in fig. 2, 3, 4 and 9: a transmission mechanism 1 is arranged on one side of the frame 2, the transmission mechanism 1 is meshed with an eccentric sleeve 7 in a tooth form, the transmission mechanism 1 can drive the eccentric sleeve 7 to do eccentric motion when working, a main shaft 6 is arranged in the eccentric sleeve 7, and the eccentric sleeve 7 drives the main shaft 6 to make the main shaft 6 do eccentric motion; the movable cone 11 is sleeved on the main shaft 6 and moves along with the main shaft 6; the pressure bushing 10 is arranged between the frame 2 and the movable cone 11; a pressure lining base 8 is arranged between the frame 2 and the pressure lining 10; and a buffer device 4 is arranged between the movable cone 11 and the pressure lining base 8, and the buffer device 4 is positioned at the outer side of the pressure lining 10; the buffer device 4 includes a plurality of first arc pieces 401 and second arc pieces 402 which are engaged with each other by an elastic engagement structure to form a circular ring. A friction ring 1101 is arranged on the movable cone 11, and a sealing element 9 is arranged between the movable cone 11 and the pressure lining base 8; the seal 9 comprises a friction surface 901 in parallel contact with the friction ring 1101, a seal ring 902 embedded in the seal 9 and hermetically connected with the outside of the pressure liner base 8, and a fixing pin 903 for fixing the seal 9 and the pressure liner base 8; when the movable cone 11 and the seal 9 move relatively, a sealed space is formed inside the device by utilizing the sufficient contact between the friction surface 901 of the seal 9 and the friction ring 1101 and the seal ring 902, so that external dust is prevented from entering the device, and the service life of the device is prolonged.

As shown in fig. 6 and 7: a transmission mechanism 1 is arranged on one side of the frame 2, the transmission mechanism 1 is meshed with an eccentric sleeve 7 in a tooth form, the transmission mechanism 1 can drive the eccentric sleeve 7 to do eccentric motion when working, a main shaft 6 is arranged in the eccentric sleeve 7, and the eccentric sleeve 7 drives the main shaft 6 to make the main shaft 6 do eccentric motion; the movable cone 11 is sleeved on the main shaft 6 and moves along with the main shaft 6; the pressure bushing 10 is arranged between the frame 2 and the movable cone 11; a pressure lining base 8 is arranged between the frame 2 and the pressure lining 10; and a buffer device 4 is arranged between the movable cone 11 and the pressure lining base 8, and the buffer device 4 is positioned at the outer side of the pressure lining 10; the buffer device 4 includes a plurality of first arc pieces 401 and second arc pieces 402 which are engaged with each other by an elastic engagement structure to form a circular ring. The pressure bushing 10 is fixedly connected with the pressure bushing base 8, and the buffer device 4 is connected with the pressure bushing 10 through a gap. Through the fixed connection, can prevent to a certain extent that to the relative slip takes place between pressure bush 10 and the pressure bush base 8, provide the buffer distance for pressure bush 10 through the clearance connection to avoid damaging buffer 4.

As shown in fig. 1, 2, 4, 7 and 8: the device also comprises a transmission mechanism 1 fixed on the frame 2; the driving gear 12 is connected with the transmission mechanism 1 through tooth-shaped meshing, the driving gear 12 is sleeved on the outer side of the eccentric sleeve 7, the main shaft 6 is installed in the eccentric sleeve 7, and an oil through pipe 601, a first side pipe 602 and a second side pipe 603 are arranged in the main shaft 6; one end of the oil pipe 601 is connected with the oil inlet pipe 5 on the frame 2, the first side pipe 602 is communicated with the oil pipe 601 and the inner space of the movable cone 11, and the second side pipe 603 is communicated with the oil pipe 601 and the inner space of the eccentric sleeve 7. A part of lubricating oil entering from the oil inlet pipe 5 enters the movable cone 11 through the first side pipe 602, a part of the lubricating oil enters the eccentric sleeve 7 through the second side pipe 603, and the lubricating oil also enters between the pressure bushing 10 and the pressure bushing base 8 through the first through hole 801, so that the entering of the lubricating oil is accelerated, then the lubricating oil enters the sealing element 9 through the oil through hole 404, and enters between the pressure bushing 10 and the movable cone 11 through the second through hole 1001, and the sufficient and smooth lubricating oil in the working process of the device is ensured.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention.

Claims

1. A cone crusher, characterized in that: it comprises a frame (2);

a drive gear (12), the drive gear (12) being disposed on the chassis (2);

the movable cone (11) is eccentrically and rotatably arranged on the rack (2);

a pressure bushing (10), the pressure bushing (10) being arranged between the frame (2) and the movable cone (11);

the pressure bushing base (8), the pressure bushing base (8) is arranged between the frame (2) and the pressure bushing (10);

wherein a buffer device (4) is arranged between the movable cone (11) and the pressure lining base (8) and is positioned at the outer side of the pressure lining (10); buffer (4) include a plurality of first circular arc piece (401) and the second circular arc piece (402) that form the ring through mutual gomphosis of an elasticity gomphosis structure, just buffer (4) through fixed plate (403) with pressure bush base (8) are connected fixedly.

2. The cone crusher in accordance with claim 1 wherein: the elastic embedding structure comprises two side plates (4011) arranged at two ends of the first arc piece (401) and a middle plate (4012) between the two side plates (4011), and a first inserting groove (4013) is formed between the middle plate (4012) and the two side plates (4011); and both ends of the second arc piece (402) are provided with an inserting plate (4021) which can be inserted into the first inserting groove (4013) and a middle groove (4022) for inserting the middle plate (4012).

3. The cone crusher in accordance with claim 2 wherein: the first arc piece (401) and the second arc piece (402) are made of hard metal, and the side plate (4011), the middle plate (4012) and the insert plate (4021) are made of hard elastic plastic.

4. A cone crusher in accordance with claim 1 or 2 or 3, characterized in that: the pressure bushing is characterized in that a first through hole (801) is formed in the pressure bushing base (8), an installation groove (802) which is communicated with the outer side of the pressure bushing base (8) and the first through hole (801) is formed in the pressure bushing (10), and a second through hole (1001) which is coincided with the central axis of the first through hole (801) is formed in the pressure bushing.

5. The cone crusher in accordance with claim 4 wherein: the fixing plate (403) is embedded in the mounting groove (802), the fixing plate (403) is in interference connection with the mounting groove (802), and one end of the fixing plate (403) is provided with a certain radian which is the same as that of the first through hole (801).

6. A cone crusher in accordance with claim 1 or 2 or 3, characterized in that: a friction ring (1101) is arranged on the movable cone (11), and a sealing element (9) is arranged between the movable cone (11) and the pressure bushing base (8); the sealing element (9) comprises a friction surface (901) which is in parallel contact with the friction ring (1101), a sealing ring (902) which is embedded in the sealing element (9) and is in sealing connection with the outer side of the pressure lining base (8), and a fixing pin (903) which is used for fixing the sealing element (9) and the pressure lining base (8).

7. The cone crusher in accordance with claim 4 wherein: a friction ring (1101) is arranged on the movable cone (11), and a sealing element (9) is arranged between the movable cone (11) and the pressure bushing base (8); the sealing element (9) comprises a friction surface (901) which is in parallel contact with the friction ring (1101), a sealing ring (902) which is embedded in the sealing element (9) and is in sealing connection with the outer side of the pressure lining base (8), and a fixing pin (903) which is used for fixing the sealing element (9) and the pressure lining base (8).

8. The cone crusher in accordance with claim 5 wherein: a friction ring (1101) is arranged on the movable cone (11), and a sealing element (9) is arranged between the movable cone (11) and the pressure bushing base (8); the sealing element (9) comprises a friction surface (901) which is in parallel contact with the friction ring (1101), a sealing ring (902) which is embedded in the sealing element (9) and is in sealing connection with the outer side of the pressure lining base (8), and a fixing pin (903) which is used for fixing the sealing element (9) and the pressure lining base (8).

9. A cone crusher in accordance with claim 1 or 2 or 3, characterized in that: the pressure bushing (10) is fixedly connected with the pressure bushing base (8), and a gap is formed between the buffer device (4) and the pressure bushing (10).

10. A cone crusher in accordance with claim 1 or 2 or 3, characterized in that: the device also comprises a transmission mechanism (1) fixed on the frame (2); the driving gear (12) is connected with the transmission mechanism (1) in a tooth-shaped meshing manner, the driving gear (12) is sleeved on the outer side of an eccentric sleeve (7), a main shaft (6) is installed in the eccentric sleeve (7), and an oil through pipe (601), a first side pipe (602) and a second side pipe (603) are arranged in the main shaft (6); oil pipe (601) one end connection is located advancing oil pipe (5) on frame (2), and first side pipe (602) intercommunication oil pipe (601) and the inner space of moving cone (11), second side pipe (603) intercommunication oil pipe (601) with eccentric cover (7) inner space.