CN212744581U

CN212744581U - Long-stroke stable hydraulic cylinder

Info

Publication number: CN212744581U
Application number: CN202021692408.7U
Authority: CN
Inventors: 宗伯良
Original assignee: Wuxi Jiana Machinery Manufacturing Co ltd
Current assignee: Wuxi Jiana Machinery Manufacturing Co ltd
Priority date: 2020-08-13
Filing date: 2020-08-13
Publication date: 2021-03-19
Anticipated expiration: 2030-08-13

Abstract

The utility model relates to a long stroke stable type hydraulic cylinder; the method is characterized in that: the oil inlet sealing device comprises an outer barrel, a moving rod movably arranged in the outer barrel, a guide shaft penetrating through the moving rod, a sealing mechanism for sealing the inner barrel, a first oil inlet formed in the outer barrel and a second oil inlet formed in the moving rod; an oil inlet groove is formed around the movable rod; the first oil inlet is communicated with the oil inlet groove; the second oil inlet is communicated with the interior of the movable rod; the guide shaft is arranged in the outer barrel; the sealing mechanism is sleeved on the moving rod. The problem of the relatively poor fluid that takes place easily of leakproofness leaks and produces offset when the longer actuating lever of pneumatic cylinder stroke removes in the pneumatic cylinder that current scheme caused is solved.

Description

Long-stroke stable hydraulic cylinder

Technical Field

The utility model relates to a pneumatic cylinder, concretely relates to long stroke stable form pneumatic cylinder.

Background

In general, in the machine manufacturing industry, hydraulic transmission has become an indispensable technology and is commonly applied to various mechanical devices. The hydraulic cylinder is the most important executive component in the hydraulic transmission system, and converts hydraulic energy into mechanical energy to realize linear reciprocating motion. The hydraulic cylinder has simple structure, flexible configuration and convenient use and maintenance, so the hydraulic cylinder is widely applied.

With the wide application of hydraulic products in various industries, the function of the hydraulic cylinder as an actuating element in the hydraulic products is more and more important, and the hydraulic products in different industries have various characteristics. The hydraulic cylinder used on large elbow pushing machine equipment, large hydro junction hydraulic hoist equipment, special ship equipment, large petroleum equipment, large metallurgical equipment, other industries and other special equipment requires the hydraulic cylinder to have an ultra-long working stroke due to the use characteristics of the hydraulic cylinder, and has the advantages of stable operation, good sealing performance and the like. However, the existing long-stroke hydraulic cylinder has a long size, so that oil leakage occurs in the hydraulic cylinder for a long time, and how to solve the problem becomes very important.

The existing scheme adopts the technical scheme that a driving rod is arranged in a barrel in a moving mode, a piston is arranged on the driving rod to separate the interior of the barrel, one end of the interior of the barrel is communicated with a first inlet, and the other end of the interior of the barrel is communicated with a second inlet. Such a solution has the following problems: (1) the sealing performance in the hydraulic cylinder is poor, and oil leakage is easy to occur; (2) the hydraulic cylinder has a long stroke, and the driving rod generates position deviation when moving.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art, the utility model discloses a long stroke stable form pneumatic cylinder to the relatively poor easy emergence fluid of pneumatic cylinder internal seal nature produces the offset scheduling problem when removing with the longer actuating lever of pneumatic cylinder stroke among the solution prior art.

The utility model discloses the technical scheme who adopts as follows:

a long stroke stable hydraulic cylinder;

the oil inlet sealing device comprises an outer barrel, a moving rod movably arranged in the outer barrel, a guide shaft penetrating through the moving rod, a sealing mechanism for sealing the inner barrel, a first oil inlet formed in the outer barrel and a second oil inlet formed in the moving rod; an oil inlet groove is formed around the movable rod; the first oil inlet is communicated with the oil inlet groove; the second oil inlet is communicated with the interior of the movable rod; the guide shaft is arranged in the outer barrel; the sealing mechanism is sleeved on the moving rod.

The further technical scheme is as follows: the outer cylinder comprises a cylinder body, a first end cover arranged at one end of the cylinder body and a second end cover arranged at the other end of the cylinder body; the guide shaft is arranged at one end, close to the moving rod, of the first end cover; the movable rod penetrates through the second end cover.

The further technical scheme is as follows: cover grooves are formed in the second end cover in parallel; a first sealing ring is placed in the cover groove; the first seal ring is disposed around the travel bar.

The further technical scheme is as follows: a rod groove is formed in the movable rod; a guide groove is formed in the rod groove along the moving direction of the moving rod; the second oil inlet is communicated with the rod groove.

The further technical scheme is as follows: a third sealing ring is arranged at one end, close to the guide shaft, in the rod groove; the third sealing ring is spirally wound in the rod groove.

The further technical scheme is as follows: one end of the guide shaft embedded into the rod groove is provided with a guide block; the guide block is embedded in the guide groove.

The further technical scheme is as follows: the sealing mechanism comprises a second sealing ring, a sealing element and a locking element, wherein the second sealing ring is sleeved on the moving rod in parallel, the sealing element supports the second sealing ring, and the locking element compresses the second sealing ring; the sealing element is sleeved between the adjacent second sealing rings on the moving rod; the retaining member is in threaded connection with the moving rod.

The further technical scheme is as follows: the axial section of the second sealing ring is I-shaped; the axial section of the sealing element is T-shaped.

The further technical scheme is as follows: a circulation port is formed in one end, far away from the first oil inlet, of the outer barrel; the outer cylinder is provided with an electromagnetic valve for controlling the opening and closing of the circulation port; the electromagnetic valve is communicated with the circulation port.

The utility model has the advantages as follows: the utility model discloses a long stroke stable form pneumatic cylinder adopts the guiding axle to wear to establish in the carriage release lever. A sealing mechanism is sleeved on the moving rod to separate the outer cylinder. The long-stroke stable hydraulic cylinder has the following effects: (1) the left end of the cylinder body and the outer surface of the movable rod can be completely sealed through the first sealing ring, so that leakage of oil is avoided; (2) oil enters the rod groove through the second oil inlet and pushes the moving rod to move from right to left, and the oil enters the rod groove to finish the movement of the moving rod from right to left, so that the oil consumption of the oil is reduced, and the use cost is saved; (3) the movable rod moves left and right along the guide shaft, the position deviation of the movable rod during movement is avoided through the guide shaft, and the movable rod can move left and right stably by embedding the guide block into the guide groove; (4) the rod groove and the guide shaft can be directly sealed through the third sealing ring, and the third sealing ring can be prevented from loosening and displacing to avoid leakage of oil through the spiral third sealing ring; (5) the second sealing ring with the I-shaped axial section is adopted, so that the contact area between the second sealing ring and the inner surface of the outer barrel is increased, the sealing property in the outer barrel is enhanced through the second sealing ring, and the left end in the outer barrel is not communicated with the right end in the outer barrel; (6) the moving rod can move from left to right after the oil enters the oil inlet groove, so that the oil consumption of the oil is reduced, and the use cost is saved; (7) the electromagnetic valve avoids the phenomenon of vacuumizing at the right end in the outer cylinder, thereby influencing the use of the hydraulic cylinder.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. an outer cylinder; 11. a first oil inlet; 12. a first end cap; 13. a second end cap; 14. a cover groove; 15. a first seal ring; 16. a barrel; 17. a flow port; 2. a travel bar; 21. a rod groove; 22. a guide groove; 23. a third seal ring; 24. a second oil inlet; 25. an oil inlet groove; 3. a guide shaft; 31. a guide block; 4. a sealing mechanism; 41. a second seal ring; 42. a seal member; 43. and a locking member.

Detailed Description

The following describes a specific embodiment of the present embodiment with reference to the drawings.

Fig. 1 is a schematic structural diagram of the present invention. With reference to fig. 1, the utility model discloses a long stroke stable hydraulic cylinder. The direction of X in the figure does the utility model discloses structure schematic's upper end, the direction of Y in the figure does the utility model discloses structure schematic's right-hand member. The long-stroke stable hydraulic cylinder comprises an outer cylinder 1, a moving rod 2 movably arranged in the outer cylinder 1, a guide shaft 3 penetrating in the moving rod 2, a sealing mechanism 4 sealing the outer cylinder 1, a first oil inlet 11 formed in the outer cylinder 1 and a second oil inlet 24 formed in the moving rod 2. An oil feed groove 25 is opened around the traveling bar 2. The first oil inlet 11 is communicated with the oil inlet groove 25. The second oil inlet 24 is communicated with the interior of the moving rod 2. The guide shaft 3 is disposed inside the outer cylinder 1. The sealing mechanism 4 is sleeved on the moving rod 2.

The outer cylinder 1 comprises a cylinder 16, a first end cover 12 arranged at one end of the cylinder 16 and a second end cover 13 arranged at the other end of the cylinder 16. The guide shaft 3 is provided at one end of the first end cap 12 near the travel bar 2. The moving rod 2 is arranged on the second end cover 13 in a penetrating way.

The cylinder 16 is disposed in the left-right direction. The cylindrical body 16 penetrates in the left-right direction. The first end cap 12 is disposed at the right end of the barrel 16. The second end cap 13 is disposed at the left end of the barrel 16. The guide shaft 3 is provided in the cylindrical body 16 in the left-right direction. The right end of the guide shaft 3 is connected to the left surface of the first cap 12. The travel bar 2 is disposed in the cylinder 16 in the left-right direction. The left end of the guide shaft 3 is fitted into the right end of the travel bar 2. The left end of the travel bar 2 passes through the second end cap 13.

Cover slots 14 are formed around the second end cover 13 in parallel. A first sealing ring 15 is placed in the cover groove 14. A first sealing ring 15 is arranged around the displacement rod 2.

Preferably, the first seal ring 15 is a rubber seal ring. Preferably, the second end cap 13 is annular. The outer ring of the second end cap 13 is connected to the left end of the barrel 16. Cover grooves 14 are formed around the inner ring of the second end cover 13 in parallel. The outer ring of the first seal ring 15 is arranged in the cover groove 14, and the inner ring of the first seal ring 15 is attached to the outer surface of the moving rod 2. The left end of the cylinder 16 and the movable rod 2 can be completely sealed through the first sealing ring 15, and oil leakage is avoided.

A rod groove 21 is formed in the moving rod 2. A guide groove 22 is formed in the rod groove 21 along the moving direction of the moving rod 2. The second oil inlet 24 communicates with the rod groove 21.

A rod groove 21 is opened in the right end surface of the travel rod 2. The guide groove 22 is opened in the rod groove 21 in the right and left directions. The guide shaft 3 is fitted into the right end of the rod groove 21. The second oil inlet 24 communicates with the left end of the rod groove 21.

Oil enters the rod groove 21 through the second oil inlet 24, and the oil pushes the movable rod 2 to move from right to left. The oil enters the rod groove 21 to finish the movement of the moving rod 2 from right to left, so that the oil consumption of the oil is reduced, and the use cost is saved.

The guide shaft 3 is provided with a guide block 31 at one end fitted into the rod groove 21. The guide block 31 is fitted into the guide groove 22.

The guide shaft 3 is provided at its left end with a guide block 31. One end of the guide block 31 is connected to the guide shaft 3, and the other end of the guide block 31 is fitted into the guide groove 22. The movable rod 2 moves left and right along the guide shaft 3, and the position deviation when the movable rod 2 moves is avoided through the guide shaft 3. The guide block 31 is inserted into the guide groove 22, so that the moving bar 2 can be moved smoothly in the left and right directions.

A third seal ring 23 is provided in the rod groove 21 at an end adjacent to the guide shaft 3. The third seal ring 23 is spirally wound in the rod groove 21.

Preferably, the third seal ring 23 is a rubber seal ring. The third seal ring 23 is spirally wound around the right end of the inner surface of the rod groove 21. The outer ring of the third seal ring 23 is connected to the inner surface of the rod groove 21. The inner ring of the third seal ring 23 abuts the outer surface of the guide shaft 3. The rod groove 21 and the guide shaft 3 can be sealed through the third sealing ring 23, and the third sealing ring 23 can be prevented from loosening and displacing, so that oil leakage is avoided.

The sealing mechanism 4 comprises a second sealing ring 41 which is sleeved on the moving rod 2 in parallel, a sealing member 42 which supports the second sealing ring 41 and a locking member 43 which presses the second sealing ring 41. The sealing member 42 is fitted between the adjacent second seal rings 41 on the moving rod 2. The locking member 43 is screwed to the moving bar 2.

Preferably, the axial cross section of the second seal ring 41 is i-shaped. Preferably, the seal 42 is T-shaped in axial cross-section.

Preferably, the second seal 41 is a rubber seal. The second seal ring 41 is sleeved in parallel at the right end of the movable rod 2. The sealing member 42 and the second sealing ring 41 are spaced apart from each other. The locking member 43 is screwed to the right end of the moving bar 2. By tightening the locking element 43 so that the sealing element 42 and the second sealing ring 41 are close to each other, the structural strength of the second sealing ring 41 is increased by the sealing element 42. By adopting the second sealing ring 41 with the I-shaped axial cross section, the contact area between the second sealing ring 41 and the inner surface of the outer cylinder 1 is increased, and the sealing property in the outer cylinder 1 is enhanced by the second sealing ring 41, so that the left end in the outer cylinder 1 is not communicated with the right end in the outer cylinder 1.

The oil feed groove 25 is opened around the outer surface of the moving rod 2. The oil feed groove 25 is located on the left side of the seal mechanism 4. Oil enters the oil inlet groove 25 through the first oil inlet 11, and the oil pushes the movable rod 2 to move from left to right. The oil enters the oil inlet groove 25 to finish the movement of the movable rod 2 from left to right, so that the oil consumption of the oil is reduced, and the use cost is saved.

And a circulation port 17 is formed at one end of the outer barrel 1, which is far away from the first oil inlet 11. The outer cylinder 1 is provided with an electromagnetic valve for controlling the opening and closing of the flow port 17. The solenoid valve is connected to the vent 17.

The circulation port 17 is opened at the right end of the outer cylinder 1. When the moving rod 2 moves from left to right along the inside of the outer cylinder 1, the solenoid valve is opened to discharge air at the right end of the inside of the outer cylinder 1. When the moving rod 2 moves from right to left in the outer tub 1, the solenoid valve is opened and air enters the right end in the outer tub 1. The electromagnetic valve avoids the phenomenon of vacuumizing at the right end in the outer cylinder 1, thereby influencing the use of the hydraulic cylinder.

The selection of the type of solenoid valve is common knowledge. The person skilled in the art can choose the type of solenoid valve, for example 2V025-08, according to the working conditions of the device.

In the present embodiment, the first seal ring 15 is described as a rubber seal ring, but the present invention is not limited thereto, and may be another seal ring within a range capable of exhibiting its function.

In the present embodiment, the third seal ring 23 is described as a rubber seal ring, but the present invention is not limited thereto, and may be another seal ring within a range capable of exhibiting its function.

In the present embodiment, the second seal 41 is described as a rubber seal, but the present invention is not limited thereto, and may be another seal within a range capable of exhibiting its function.

In the present specification, terms such as "annular", "i-shaped" and "T-shaped" are used, and these terms are not limited to "annular", "i-shaped" and "T-shaped" precisely, and may be in a state of "substantially annular", "substantially i-shaped" and "substantially T-shaped" within a range in which the functions thereof can be exerted.

In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The above description is for the purpose of explanation and not limitation of the invention, which is defined in the claims, and any modifications may be made without departing from the basic structure of the invention.

Claims

1. The utility model provides a long stroke stable form pneumatic cylinder which characterized in that: the oil-water separator comprises an outer barrel (1), a moving rod (2) movably arranged in the outer barrel (1), a guide shaft (3) penetrating in the moving rod (2), a sealing mechanism (4) sealing the inner part of the outer barrel (1), a first oil inlet (11) formed in the outer barrel (1) and a second oil inlet (24) formed in the moving rod (2); an oil inlet groove (25) is formed around the movable rod (2); the first oil inlet (11) is communicated with the oil inlet groove (25); the second oil inlet (24) is communicated with the interior of the moving rod (2); the guide shaft (3) is arranged in the outer cylinder (1); the sealing mechanism (4) is sleeved on the moving rod (2).

2. The long stroke stabilized hydraulic cylinder of claim 1, wherein: the outer cylinder (1) comprises a cylinder body (16), a first end cover (12) arranged at one end of the cylinder body (16) and a second end cover (13) arranged at the other end of the cylinder body (16); the guide shaft (3) is arranged at one end, close to the movable rod (2), of the first end cover (12); the moving rod (2) penetrates through the second end cover (13).

3. The long stroke stabilized hydraulic cylinder of claim 2, wherein: cover grooves (14) are formed in the second end cover (13) in parallel; a first sealing ring (15) is placed in the cover groove (14); the first sealing ring (15) is arranged around the shifting rod (2).

4. The long stroke stabilized hydraulic cylinder of claim 1, wherein: a rod groove (21) is formed in the movable rod (2); a guide groove (22) is formed in the rod groove (21) along the moving direction of the moving rod (2); the second oil inlet (24) is communicated with the rod groove (21).

5. The long stroke stabilized hydraulic cylinder of claim 4, wherein: a third sealing ring (23) is arranged at one end, close to the guide shaft (3), in the rod groove (21); the third sealing ring (23) is spirally wound in the rod groove (21).

6. The long stroke stabilized hydraulic cylinder of claim 5, wherein: one end of the guide shaft (3) embedded into the rod groove (21) is provided with a guide block (31); the guide block (31) is inserted into the guide groove (22).

7. The long stroke stabilized hydraulic cylinder of claim 1, wherein: the sealing mechanism (4) comprises a second sealing ring (41) sleeved on the moving rod (2) in parallel, a sealing element (42) supporting the second sealing ring (41) and a locking element (43) pressing the second sealing ring (41); the sealing element (42) is sleeved between the adjacent second sealing rings (41) on the movable rod (2); the locking piece (43) is in threaded connection with the moving rod (2).

8. The long stroke stabilized hydraulic cylinder of claim 7, wherein: the axial section of the second sealing ring (41) is I-shaped; the axial section of the sealing element (42) is T-shaped.

9. The long stroke stabilized hydraulic cylinder of claim 1, wherein: a circulating port (17) is formed in one end, far away from the first oil inlet (11), of the outer barrel (1); the outer cylinder (1) is provided with an electromagnetic valve for controlling the opening and closing of the circulation port (17); the electromagnetic valve is communicated with the circulation port (17).