CN213270534U

CN213270534U - Multiple sealing end cover for air cylinder

Info

Publication number: CN213270534U
Application number: CN202022164158.6U
Authority: CN
Inventors: 宗伯良
Original assignee: Wuxi Jiana Machinery Manufacturing Co ltd
Current assignee: Wuxi Jiana Machinery Manufacturing Co ltd
Priority date: 2020-09-27
Filing date: 2020-09-27
Publication date: 2021-05-25
Anticipated expiration: 2030-09-27

Abstract

The utility model relates to a multiple sealing end cover for a cylinder; the method is characterized in that: the sealing device comprises a cover body covered on a cylinder sleeve, a first sealing mechanism for sealing the end face of the cylinder sleeve, a second sealing mechanism for sealing one end of the cover body, a third sealing mechanism for sealing the other end of the cover body, a guide mechanism sleeved on a piston rod and an air inlet channel for circulating air; the first sealing mechanism is arranged in the cover body around the end surface of the cylinder sleeve; the second sealing mechanism is sleeved on the piston rod; one end of the cover body buckles the second sealing mechanism; the third sealing mechanism is arranged at the other end of the cover body around the piston rod; the guide mechanism is arranged at the other end of the cover body along the moving direction of the piston rod; the air inlet channel is communicated with the cylinder sleeve. The problems that the sealing ring in the end cover is seriously abraded after the piston shaft works in a reciprocating mode for a long time, gas leakage is caused, the connection between the end cover and the cylinder sleeve is not firm, gas leakage is caused, and the like in the prior art are solved.

Description

Multiple sealing end cover for air cylinder

Technical Field

The utility model relates to a cylinder end cover, concretely relates to multiple end cover that seals for cylinder.

Background

Generally, a cylinder is a cylindrical metal part capable of guiding a piston to perform linear reciprocating motion in the cylinder, and air converts thermal energy into mechanical energy through expansion in the cylinder; the gas is compressed by a piston in a compressor cylinder to increase pressure. With the continuous development of automation technology and the continuous rising of labor cost, mechanical equipment is inevitably developed towards high speed, high efficiency and full automation. The realization of automation, can not leave executing element such as electronic, pneumatics, the cylinder is the most common pneumatic actuator. But the existing cylinder has poor sealing performance at the end cover of the cylinder after long-term use, and how to solve the problem becomes crucial.

According to the existing scheme, an end cover is arranged on the end face of a cylinder sleeve, a sealing ring is wound in the end cover, and a piston shaft penetrates through the cylinder sleeve. Such a solution has the following problems: (1) after the piston shaft works in a reciprocating way for a long time, the sealing ring in the end cover is seriously abraded, so that gas leakage is caused; (2) the end cover and the cylinder sleeve are connected insecurely to cause leakage, so that gas leakage is caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a not enough to prior art, the utility model discloses a multiple end cover for cylinder to solve among the prior art sealing washer wearing and tearing in the long time reciprocating work rear end cap of piston shaft and seriously cause gaseous leakage and the insecure leakage scheduling problem that takes place to leak between end cover, the cylinder liner that causes of connection.

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

a multiple seal end cap for a cylinder;

the device comprises a cover body covered on a cylinder sleeve, a first sealing mechanism for sealing the end surface of the cylinder sleeve, a second sealing mechanism for sealing one end of the cover body, a third sealing mechanism for sealing the other end of the cover body, a guide mechanism sleeved on a piston rod and an air inlet channel for circulating air; the first sealing mechanism is arranged in the cover body around the end face of the cylinder sleeve; the second sealing mechanism is sleeved on the piston rod; one end of the cover body is buckled with the second sealing mechanism; the third sealing mechanism is arranged at the other end of the cover body around the piston rod; the guide mechanism is arranged at the other end of the cover body along the moving direction of the piston rod; the air inlet channel is communicated with the cylinder sleeve.

The further technical scheme is as follows: one end of the cover body is respectively provided with a first sealing groove and a second sealing groove; the first sealing mechanism is arranged in the first sealing groove; a first tooth form is arranged around the second sealing groove; the first tooth form buckles the second sealing mechanism; the other end of the cover body is provided with a third sealing groove; the third sealing mechanism is arranged in the third sealing groove; a pressing plate for fixing the third sealing mechanism is oppositely arranged in the third sealing groove; the pressure plate is embedded in the third sealing mechanism.

The further technical scheme is as follows: the first sealing mechanism comprises a first sealing ring arranged in the first sealing groove and sealing sheets arranged at one end of the cover body in parallel; the first sealing ring gradually shrinks along the installation direction of the cylinder sleeve; the sealing sheet is arranged at one end of the cover body around the first sealing groove.

The further technical scheme is as follows: the second sealing mechanism comprises a second sealing ring sleeved on the piston rod, a second tooth form arranged in parallel around the second sealing ring and a bearing plate arranged in the cylinder sleeve; the first tooth forms and the second tooth forms are meshed with each other in a staggered manner; the bearing plate is arranged at one end, close to the cylinder sleeve, of the second sealing ring.

The further technical scheme is as follows: the third sealing mechanism comprises a connecting body arranged in the third sealing groove and a third sealing ring for sealing the piston shaft; the third sealing ring is arranged on the connecting body around the piston shaft; the connecting body is relatively provided with a pressing groove; the pressing plate is embedded into the pressing groove.

The further technical scheme is as follows: the guide mechanism comprises a guide sleeve sleeved on the piston rod and a screw for fixing the guide sleeve; the guide sleeve is arranged at the other end of the cover body; the screw penetrates through the guide sleeve, and the screw thread is screwed into the cover body.

The further technical scheme is as follows: the other end of the cover body is provided with an imitated groove; a fourth sealing ring is arranged in the profiling groove; the guide sleeve is arranged in the profiling groove; the guide sleeve compresses the fourth sealing ring.

The utility model has the advantages as follows: the utility model discloses a multiple end cover for cylinder adopts the terminal surface of the sealed cylinder liner of first sealing mechanism. And sealing one end of the cover body by adopting a second sealing mechanism. And sealing the other end of the cover body by adopting a third sealing mechanism. The multiple seal end cover for the cylinder brings the following effects: (1) the left end of the cylinder sleeve is wrapped by the first sealing ring, and the inner end of the sealing sheet is attached to the cylinder sleeve, so that the first sealing mechanism can completely seal the space between the cover body and the cylinder sleeve to avoid gas leakage; (2) the cover body can buckle the second sealing mechanism through the mutual staggered meshing of the first tooth form and the second tooth form, so that the second sealing mechanism is prevented from moving rightwards and withdrawing, the sealing effect of the second sealing mechanism is ensured, and the leakage of gas in the cylinder sleeve is avoided; (3) the third sealing mechanism can be firmly fixed in the third sealing groove through the pressing plate, so that the third sealing mechanism can always seal the other end of the cover body; (4) the guide sleeve compresses the fourth sealing ring, and the fourth sealing ring and the cover body can be sealed through the fourth sealing ring; (5) the piston rod is guided by the guide sleeve, so that the piston rod can move stably.

Drawings

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

In the figure: 1. a cover body; 11. a first seal groove; 12. a second seal groove; 13. a first tooth form; 14. a third seal groove; 15. pressing a plate; 16. profiling grooves; 17. a fourth seal ring; 2. a first sealing mechanism; 21. A first seal ring; 22. sealing the sheet; 3. a second sealing mechanism; 31. a second seal ring; 32. a second tooth form; 33. a bearing plate; 4. a third sealing mechanism; 41. a linker; 42. a third seal ring; 43. pressing a groove; 5. a guide mechanism; 51. a guide sleeve; 52. a screw; 6. an intake passage.

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 multiple seal end cover for 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 multiple sealing end cover for the cylinder comprises a cover body 1 covering the cylinder sleeve, a first sealing mechanism 2 sealing the end face of the cylinder sleeve, a second sealing mechanism 3 sealing one end of the cover body 1, a third sealing mechanism 4 sealing the other end of the cover body 1, a guide mechanism 5 sleeved on the piston rod and an air inlet channel 6 for circulating air. The first sealing mechanism 2 is arranged in the cover body 1 around the end surface of the cylinder sleeve. The second sealing mechanism 3 is sleeved on the piston rod. One end of the cover body 1 is buckled with the second sealing mechanism 3. A third sealing mechanism 4 is provided at the other end of the cap 1 around the piston rod. The guide mechanism 5 is provided at the other end of the cap 1 in the piston rod moving direction. The air inlet passage 6 is communicated with the cylinder sleeve.

A first sealing groove 11 and a second sealing groove 12 are respectively formed at one end of the cover body 1. The first seal mechanism 2 is disposed in the first seal groove 11. A first tooth profile 13 opens around the second sealing groove 12. The first tooth profile 13 grips the second sealing means 3. The other end of the cover 1 is opened with a third sealing groove 14. The third seal mechanism 4 is disposed within the third seal groove 14. A pressure plate 15 for fixing the third seal mechanism 4 is provided in the third seal groove 14. The pressing plate 15 is embedded in the third sealing mechanism 4.

The cover body 1 is provided with through holes in the left and right directions. The piston shaft passes through the through hole. The first sealing groove 11 is opened on the right surface of the cover body 1 far away from the through hole. The second sealing groove 12 is opened on the right surface of the cover body 1 near the through hole. A third seal groove 14 is opened around the left end in the lid body 1. The first tooth profile 13 opens around the inner surface of the second seal groove 12. The pressure plates 15 are arranged side by side in the left-right direction on both left and right sides in the third seal groove 14.

The first seal mechanism 2 includes a first seal ring 21 disposed in the first seal groove 11 and a seal piece 22 disposed in parallel at one end of the lid body 1. The first seal ring 21 is gradually contracted in the cylinder liner installation direction. A sealing sheet 22 is provided at one end of the lid body 1 around the first sealing groove 11.

Preferably, the first seal ring 21 is a rubber seal ring. Preferably, the sealing sheet 22 is plural. Preferably, the first seal ring 21 is V-shaped. The first seal ring 21 is gradually contracted from right to left. A seal fin 22 is juxtaposed on the right surface of the lid body 1 around the first seal groove 11. The outer end of the sealing disc 22 is connected to the lid 1. The inner end of sealing disc 22 is adjacent to first seal groove 11.

The cover body 1 is arranged at the left end of the cylinder sleeve. The left end of the cylinder sleeve is embedded into the first sealing groove 11, the inner end of the sealing sheet 22 swings leftwards, and the left end of the cylinder sleeve is embedded into the first sealing ring 21. The left end of the cylinder sleeve is wrapped by the first sealing ring 21, and the inner end of the sealing sheet 22 is attached to the cylinder sleeve, so that the first sealing mechanism 2 can completely seal the space between the cover body 1 and the cylinder sleeve, and gas leakage is avoided.

The second sealing mechanism 3 comprises a second sealing ring 31 sleeved on the piston rod, a second tooth form 32 arranged in parallel around the second sealing ring 31 and a bearing plate 33 arranged in the cylinder sleeve. The first tooth profiles 13 and the second tooth profiles 32 are in staggered engagement with each other. A receiving plate 33 is provided on the second seal ring 31 near one end of the cylinder liner.

Preferably, the second seal ring 31 is a rubber seal ring. The second seal ring 31 is provided on the right side of the lid body 1. The second seal ring 31 is sleeved on the outer surface of the piston rod. A second tooth profile 32 is provided around the outer surface of the second sealing ring 31. The receiving plate 33 is provided at the right end of the second seal ring 31. The receiving plate 33 is disposed at the left end in the cylinder liner.

When the air inlet channel 6 is communicated with air, the air enters the left end in the cylinder sleeve through the air inlet channel 6, the air pushes the bearing plate 33 leftwards, and the bearing plate 33 pushes the second tooth-shaped 32 leftwards. Through the mutual staggered meshing of the first tooth form 13 and the second tooth form 32, the cover body 1 can buckle the second sealing mechanism 3, the second sealing mechanism 3 is prevented from moving rightwards and retreating, the sealing effect of the second sealing mechanism 3 is ensured, and the leakage of gas in the cylinder sleeve is avoided.

The third seal mechanism 4 includes a connecting body 41 provided in the third seal groove 14 and a third seal ring 42 that seals the piston shaft. A third sealing ring 42 is arranged on the connecting body 41 around the piston shaft. The connecting body 41 is provided with pressing grooves 43. The pressing plate 15 is fitted into the pressing groove 43.

Preferably, the third seal ring 42 is a rubber seal ring. The inner end of the third seal 42 abuts the outer surface of the piston shaft. The outer end of the third sealing ring 42 is connected to the inner end of the connecting body 41. The outer end of the connector 41 is fitted into the third seal groove 14. The pressing grooves 43 are formed on both left and right sides of the connection body 41 in the left-right direction. When the connection body 41 is fitted into the third seal groove 14, the pressing plate 15 is fitted into the pressing groove 43, and the pressing plate 15 presses the connection body 41. The third seal mechanism 4 can be firmly fixed in the third seal groove 14 by the pressure plate 15, so that the third seal mechanism 4 can always seal the other end of the lid body 1.

The guide mechanism 5 comprises a guide sleeve 51 sleeved on the piston rod and a screw 52 for fixing the guide sleeve 51. The guide sleeve 51 is provided at the other end of the lid body 1. The screw 52 passes through the guide sleeve 51, and the screw 52 is screwed into the cover body 1.

The other end of the cover body 1 is provided with an imitated groove 16. A fourth sealing ring 17 is arranged in the contour groove 16. The guide sleeve 51 is placed in the contour groove 16. The guide sleeve 51 presses the fourth sealing ring 17.

Preferably, the fourth seal ring 17 is a rubber seal ring. The contour groove 16 is formed in the left end surface of the lid body 1. A fourth sealing ring 17 is arranged around the contour groove 16. The outer surface of the guide sleeve 51 abuts the fourth seal ring 17. The piston rod passes through the inner surface of the guide sleeve 51. The screw 52 passes through the left end of the guide sleeve 51. The right end of the screw 52 is screwed into the left end of the lid body 1.

When the screw 52 is tightened, the guide sleeve 51 presses the fourth seal ring 17, and the fourth seal ring 17 seals between the cover 1 and the fourth seal ring 17. The piston rod is guided by the guide sleeve 51 so that the piston rod can be moved smoothly.

In the present embodiment, the first seal ring 21 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 ring 31 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 42 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 fourth seal ring 17 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 specification, terms such as "V-shaped" are used, and these terms are not exactly "V-shaped" and may be in a state of "substantially V-shaped" within a range in which the functions thereof can be exhibited.

In the present specification, the number of the "plural" or the like is used, but the present invention is not limited thereto, and other numbers may be used within a range where the function 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. A multiple seal end cover for a cylinder, characterized by: the device comprises a cover body (1) covered on a cylinder sleeve, a first sealing mechanism (2) for sealing the end face of the cylinder sleeve, a second sealing mechanism (3) for sealing one end of the cover body (1), a third sealing mechanism (4) for sealing the other end of the cover body (1), a guide mechanism (5) sleeved on a piston rod and an air inlet channel (6) for circulating air; the first sealing mechanism (2) is arranged in the cover body (1) around the end face of the cylinder sleeve; the second sealing mechanism (3) is sleeved on the piston rod; one end of the cover body (1) is buckled with the second sealing mechanism (3); the third sealing mechanism (4) is arranged at the other end of the cover body (1) around the piston rod; the guide mechanism (5) is arranged at the other end of the cover body (1) along the moving direction of the piston rod; the air inlet channel (6) is communicated with the cylinder sleeve.

2. The multiple seal end cap for a cylinder according to claim 1, wherein: a first sealing groove (11) and a second sealing groove (12) are respectively formed in one end of the cover body (1); the first sealing mechanism (2) is arranged in the first sealing groove (11); a first tooth form (13) is arranged around the second sealing groove (12); the first tooth form (13) buckles the second sealing mechanism (3); the other end of the cover body (1) is provided with a third sealing groove (14); the third sealing mechanism (4) is arranged in the third sealing groove (14); a pressure plate (15) for fixing the third sealing mechanism (4) is arranged in the third sealing groove (14) relatively; the pressure plate (15) is embedded in the third sealing mechanism (4).

3. The multiple seal end cap for a cylinder according to claim 2, wherein: the first sealing mechanism (2) comprises a first sealing ring (21) arranged in the first sealing groove (11) and a sealing sheet (22) arranged at one end of the cover body (1) in parallel; the first sealing ring (21) is gradually contracted along the installation direction of the cylinder sleeve; the sealing sheet (22) is arranged at one end of the cover body (1) around the first sealing groove (11).

4. The multiple seal end cap for a cylinder according to claim 2, wherein: the second sealing mechanism (3) comprises a second sealing ring (31) sleeved on the piston rod, a second tooth form (32) arranged in parallel around the second sealing ring (31) and a bearing plate (33) arranged in the cylinder sleeve; the first tooth profiles (13) and the second tooth profiles (32) are meshed with each other in a staggered manner; the bearing plate (33) is arranged at one end, close to the cylinder sleeve, of the second sealing ring (31).

5. The multiple seal end cap for a cylinder according to claim 2, wherein: the third sealing mechanism (4) comprises a connecting body (41) arranged in the third sealing groove (14) and a third sealing ring (42) for sealing the piston shaft; the third sealing ring (42) is arranged on the connecting body (41) around the piston shaft; the connecting body (41) is provided with pressing grooves (43) oppositely; the pressing plate (15) is embedded into the pressing groove (43).

6. The multiple seal end cap for a cylinder according to claim 1, wherein: the guide mechanism (5) comprises a guide sleeve (51) sleeved on the piston rod and a screw (52) for fixing the guide sleeve (51); the guide sleeve (51) is arranged at the other end of the cover body (1); the screw (52) penetrates through the guide sleeve (51), and the screw (52) is screwed into the cover body (1).

7. The multiple seal end cap for a cylinder according to claim 6, wherein: the other end of the cover body (1) is provided with an imitated groove (16); a fourth sealing ring (17) is arranged in the profiling groove (16); the guide sleeve (51) is arranged in the profiling groove (16); the guide sleeve (51) compresses the fourth sealing ring (17).