CN218235687U

CN218235687U - Sealed leak protection type pneumatic cylinder

Info

Publication number: CN218235687U
Application number: CN202222517871.3U
Authority: CN
Inventors: 曹文骏; 杨丽华; 徐淼
Original assignee: Jiangsu Zhengfeng Hydraulic Technology Co ltd
Current assignee: Jiangsu Zhengfeng Hydraulic Technology Co ltd
Priority date: 2022-09-22
Filing date: 2022-09-22
Publication date: 2023-01-06
Anticipated expiration: 2032-09-22

Abstract

The utility model discloses a sealed leak protection type pneumatic cylinder, including cylinder body, cylinder cap, cylinder bottom, piston rod and first sealing washer, the cylinder bottom is connected the bottom of cylinder body, the cylinder cap is connected the top of cylinder body, piston sliding connection is in the inside of cylinder body, the one end of piston rod is connected the piston, the other end of piston rod passes the cylinder cap is located the outside of cylinder body, be equipped with the mounting groove on the cylinder cap, the cross-section of first sealing washer is the L type, the opening orientation of first sealing washer the mounting groove, first sealing washer is connected in the mounting groove, the inside wall cover of first sealing washer is established on the piston rod and with the piston rod laminating. This application can improve because the sealing washer takes place the upset and leads to the problem of oil leak.

Description

Sealed leak protection type pneumatic cylinder

Technical Field

The utility model belongs to the technical field of the hydraulic cylinder technique and specifically relates to a sealed leak protection type pneumatic cylinder is related to.

Background

The hydraulic oil cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and makes linear reciprocating motion (or swinging motion). The reciprocating motion device has simple structure and reliable work, can avoid a speed reducer when used for realizing reciprocating motion, has no transmission clearance, and moves stably, thereby being widely applied to hydraulic systems of various industrial machines.

The cylinder cover of the hydraulic cylinder is provided with a sealing ring, the sealing ring is generally U-shaped, an opening of the sealing ring faces the inside of the hydraulic cylinder, abnormal high pressure can be generated in the hydraulic cylinder when a piston rod moves in a reciprocating and stretching mode in the process of using the hydraulic cylinder, and therefore force is applied to the U-shaped sealing ring, the U-shaped sealing ring is turned over, and oil leakage is caused.

SUMMERY OF THE UTILITY MODEL

In order to improve because the problem that the upset leads to the oil leak takes place for the sealing washer, this application provides a sealed leak protection type pneumatic cylinder.

The application provides a sealed leak protection type pneumatic cylinder adopts following technical scheme:

the utility model provides a sealed leak protection type pneumatic cylinder, includes cylinder body, cylinder cap, cylinder bottom, piston rod and first sealing washer, the cylinder bottom is connected the bottom of cylinder body, the cylinder cap is connected the top of cylinder body, piston sliding connection is in the inside of cylinder body, the one end of piston rod is connected the piston, the other end of piston rod passes the cylinder cap is located the outside of cylinder body, be equipped with the mounting groove on the cylinder cap, the cross-section of first sealing washer is the L type, the opening orientation of first sealing washer the mounting groove, first sealing washer is connected in the mounting groove, the inside wall cover of first sealing washer is established on the piston rod and with the piston rod laminating.

Through adopting above-mentioned technical scheme, the setting of first sealing washer can play certain sealed effect to the gap between piston rod and the cylinder cap, when the piston rod carries out reciprocating telescopic motion, can produce unusual high pressure in the cylinder body, thereby the effect of the power of producing first sealing washer at the cylinder body inboard, because first sealing washer is the L type, and the opening of first sealing washer is towards the mounting groove, the lateral wall of mounting groove has played certain limiting displacement to first sealing washer, can reduce the possibility that first sealing washer takes place to overturn, thereby can improve because the sealing washer takes place to overturn and leads to the problem of oil leak.

Optionally, the mounting groove includes first groove and second groove, the first groove sets up on the cylinder cap, the second groove sets up on the cylinder body, the first groove with the second groove intercommunication, work as when the cylinder cap with the cylinder body is connected, the one end of first sealing washer is inserted and is established the first inslot, the other end of first sealing washer is inserted and is established the second inslot.

Through adopting above-mentioned technical scheme, when the cylinder cap is connected on the cylinder body, there is the gap at the position of being connected of cylinder cap and cylinder body, when piston rod concertina movement, oil in the cylinder body has the possibility of spilling from the gap at cylinder cap and cylinder body position of being connected, the setting in first groove and second groove, make the one end of first sealing washer insert establish in first groove, the other end of first sealing washer is inserted and is established in the second groove, can play sealed effect between cylinder body and the piston rod on the one hand, on the other hand also can play sealed effect to the gap at cylinder cap and cylinder body position of being connected, thereby can less emergence oil leak the possibility.

Optionally, a positioning column is connected to the inner wall of the second groove, a positioning groove is formed in the first sealing ring, and the positioning column is inserted into the positioning groove.

Through adopting above-mentioned technical scheme, can play further spacing effect to first sealing washer through the cooperation of constant head tank with the reference column, can reduce the sealing washer when the piston rod reciprocating telescopic motion takes place the possibility of drunkenness or even upset, be favorable to improving because the sealing washer takes place the problem that the upset leads to the oil leak.

Optionally, a placing groove is formed in the cylinder body and located between the mounting groove and the cylinder bottom, a second sealing ring is connected to the placing groove, the second sealing ring is sleeved on the piston rod, and the inner wall of the second sealing ring is attached to the piston rod.

Through adopting above-mentioned technical scheme, compare in only first sealing washer, the setting of second sealing washer has further strengthened sealed effect, can reduce the possibility that takes place the oil leak.

Optionally, an oil receiving groove is formed in one side, close to the bottom of the cylinder body, of the first sealing ring.

Through adopting above-mentioned technical scheme, when the piston rod is reciprocating concertina movement, probably produce great pressure in the cylinder body, make the oil in the cylinder body remove to the direction of second sealing washer, can produce great pressure to the lateral wall of second sealing washer, there is the possibility that a small amount of oil spills the second sealing washer and removes to first sealing washer, the setting up of oil receiving groove can be with the oil that spills the second sealing washer progressively accumulation in oil receiving groove, the lateral wall of the first sealing washer of help reduces pressure, thereby can reduce the possibility that first sealing washer takes place the upset because the unilateral receives great pressure, be favorable to improving because the problem that the oil leak results in the sealing washer takes place the upset.

Optionally, it is provided with a plurality of, a plurality of to connect the oil groove with first sealing washer the central axis is annular array as the center.

Through adopting above-mentioned technical scheme, a plurality of connects the oil groove annular array to set up, can further reduce first sealing washer and receive the possibility that great pressure takes place the upset because of the unilateral, is favorable to improving because the sealing washer takes place the upset and leads to the problem of oil leak.

Optionally, be equipped with the spread groove on the cylinder body, the spread groove is the annular, the tank bottom of spread groove is connected with sealed the pad, be connected with the connecting pipe on the cylinder cap, the connecting pipe is inserted and is established in the spread groove, the connecting pipe is kept away from the one end of cylinder cap supports tightly sealed pad, the cylinder cap with the cylinder body passes through bolted connection.

Through adopting above-mentioned technical scheme, the setting of connecting pipe and spread groove can be pegged graft between cylinder cap and the cylinder body, and sealed setting up of filling up has played sealed effect to being connected between connecting pipe and the spread groove, is in the same place cylinder cap and cylinder body fixed connection through the bolt, can reduce the possibility that takes place the drunkenness between cylinder body and the cylinder cap.

Optionally, the cylinder body is coated with an anti-corrosion coating.

Through adopting above-mentioned technical scheme, anticorrosive coating's setting can play certain guard action to the cylinder body, reduces because external factors leads to the cylinder body to receive the possibility of corroding, is favorable to prolonging the life of cylinder body.

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

1. the setting of first sealing washer can play certain sealed effect to the gap between piston rod and the cylinder cap, when the piston rod carries out reciprocal concertina movement, can produce unusual high pressure in the cylinder body, thereby the effect of power is produced to first sealing washer in the cylinder body inboard, because first sealing washer is the L type, and the opening of first sealing washer is towards the mounting groove, the lateral wall of mounting groove has played certain limiting displacement to first sealing washer, can reduce the possibility that first sealing washer takes place to overturn, thereby can improve because the sealing washer takes place the problem that the upset leads to the oil leak

2. When the cylinder cover is connected to the cylinder body, a gap exists between the connecting part of the cylinder cover and the cylinder body, when the piston rod moves in a telescopic mode, oil in the cylinder body has the possibility of leaking from the gap between the connecting part of the cylinder cover and the cylinder body, the first groove and the second groove are arranged, one end of the first sealing ring is inserted into the first groove, the other end of the first sealing ring is inserted into the second groove, on one hand, the sealing effect can be achieved between the cylinder body and the piston rod, on the other hand, the sealing effect can be achieved on the gap between the connecting part of the cylinder cover and the cylinder body, and therefore the possibility of oil leakage can be reduced

Drawings

FIG. 1 is a schematic structural diagram of a sealed and leak-proof hydraulic cylinder in an embodiment of the present application.

Fig. 2 is a schematic structural diagram showing a connection relationship between the connection pipe and the gasket in the embodiment of the present application.

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

Description of the reference numerals:

1. a cylinder body; 2. a cylinder cover; 3. a cylinder bottom; 4. a piston; 5. a piston rod; 6. a first seal ring; 7. a threaded oil plug; 8. connecting grooves; 9. a gasket; 11. a connecting pipe; 13. a bolt; 14. mounting grooves; 15. a first groove; 16. a second groove; 17. a positioning column; 18. positioning a groove; 19. an oil receiving groove; 20. and a second seal ring.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses sealed leak protection type pneumatic cylinder.

Referring to fig. 1 and 2, a sealed and leak-proof hydraulic cylinder comprises a cylinder body 1, a cylinder cover 2, a cylinder bottom 3, a piston 4, a piston rod 5 and a first sealing ring 6.

Referring to fig. 1 and 2, the cylinder bottom 3 is fixedly connected to the bottom of the cylinder body 1, the cylinder body 1 is coated with an anti-corrosion coating, the anti-corrosion coating can be epoxy resin paint, an oil filling port is formed in the cylinder body 1, the oil filling port is communicated with the inside of the cylinder body 1, the oil filling port is located at one end, close to the cylinder bottom 3, of the cylinder body 1, the oil filling port is a threaded oil port, and the oil filling port is connected with a threaded oil plug 7 through threads.

Referring to fig. 2 and 3, the top of cylinder body 1 is equipped with spread groove 8, spread groove 8 is the annular, the tank bottom of spread groove 8 is connected with sealed

pad

9, 1 top of cylinder body is equipped with a plurality of thread groove, a plurality of thread groove uses the central axis of cylinder body 1 to be the outside of central annular array at spread groove 8, cylinder cap 2 is connected at the top of cylinder body 1, be connected with connecting pipe 11 on the cylinder cap 2, connecting pipe 11 is inserted and is established in spread groove 8, the tight sealed pad 9 of one end of cylinder cap 2 is supported to connecting pipe 11, be equipped with the mounting hole on the cylinder cap 2, the quantity and the position of mounting hole correspond the setting with the thread groove, the mounting hole communicates with each other with the thread groove one-to-one, cylinder cap 2 passes through bolt 13 with cylinder body 1 and is connected, bolt 13 wears to establish on the mounting hole and with thread groove threaded connection.

Referring to fig. 2, the piston 4 is slidably connected inside the cylinder 1, one end of the piston rod 5 is fixedly connected to the piston 4, and the other end of the piston rod 5 passes through the cylinder cover 2 and is located outside the cylinder 1.

Referring to fig. 2 and 3, a mounting groove 14 is formed in the cylinder cover 2, the mounting groove 14 includes a first groove 15 and a second groove 16, the first groove 15 is formed in the cylinder cover 2, a notch of the first groove 15 faces the inside of the cylinder body 1, the second groove 16 is formed in the cylinder body 1, a notch of the second groove 16 faces the inside of the cylinder body 1, a side wall of one end, close to the first groove 15, of the second groove 16 is flush with the inner side of the cylinder cover 2, a side wall of one end, close to the second groove 16, of the first groove 15 is flush with the inner wall of the cylinder body 1, and a positioning column 17 is connected to the inner wall of the second groove 16.

Referring to fig. 2 and 3, the cross section of the first sealing ring 6 is L-shaped, the opening of the first sealing ring 6 faces the mounting groove 14, one end of the first sealing ring 6 is inserted into the first groove 15, the other end of the first sealing ring 6 is inserted into the second groove 16, one end of the first sealing ring 6 inserted into the second groove 16 is provided with a positioning groove 18, a positioning column 17 is inserted into the positioning groove 18, and the inner side wall of the first sealing ring 6 is sleeved on the piston rod 5 and attached to the piston rod 5.

Referring to fig. 2 and 3, one side of the first sealing ring 6 close to the inside of the cylinder body 1 is provided with a plurality of oil receiving grooves 19, and the plurality of oil receiving grooves 19 are in an annular array by taking the central axis of the first sealing ring 6 as the center.

Referring to fig. 2 and 3, a placing groove is formed in the inner side wall of the cylinder body 1, the placing groove is located between the second groove 16 and the cylinder bottom 3, a second sealing ring 20 is connected in the placing groove, the second sealing ring 20 is sleeved on the piston rod 5, and the inner wall of the second sealing ring 20 is attached to the piston rod 5.

The implementation principle of the sealed leak-proof hydraulic cylinder in the embodiment of the application is as follows:

when the piston rod 5 performs reciprocating telescopic motion, abnormal high pressure may be generated in the cylinder body 1, oil in the cylinder body 1 moves towards the top of the cylinder body 1, and the risk of overflow is generated, the arrangement of the first sealing ring 6 and the second sealing ring 20 can form double-layer sealing between the piston rod 5 and the cylinder body 1, so that the possibility of oil leakage is reduced, after long-term use, a small amount of oil may extrude out of the second sealing ring 20 and flow towards the direction of the first sealing ring 6, the first sealing ring 6 is provided with the oil receiving groove 19, and the arrangement of the oil receiving groove 19 can temporarily store the extruded oil, so that the pressure of the oil on the side wall of the first sealing ring 6 can be reduced, and the possibility of overturning of the first sealing ring 6 is reduced; the side wall of the first groove 15, the side wall of the second groove 16 and the positioning column 17 have a certain limiting effect on the first sealing ring 6, so that the possibility of overturning the first sealing ring 6 can be reduced, and the problem of oil leakage caused by overturning the sealing ring can be solved.

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

Claims

1. The utility model provides a sealed leak protection type pneumatic cylinder which characterized in that: including cylinder body (1), cylinder cap (2), cylinder end (3), piston (4), piston rod (5) and first sealing washer (6), cylinder end (3) are connected the bottom of cylinder body (1), cylinder cap (2) are connected the top of cylinder body (1), piston (4) sliding connection is in the inside of cylinder body (1), the one end of piston rod (5) is connected piston (4), the other end of piston rod (5) passes cylinder cap (2) and lie in the outside of cylinder body (1), be equipped with mounting groove (14) on cylinder cap (2), the cross-section of first sealing washer (6) is the L type, the opening orientation of first sealing washer (6) mounting groove (14), first sealing washer (6) are connected in mounting groove (14), the inside wall cover of first sealing washer (6) is established on piston rod (5) and with the laminating of piston rod (5).

2. A sealed, leak-proof hydraulic cylinder, as defined in claim 1, wherein: mounting groove (14) include first groove (15) and second groove (16), first groove (15) set up on cylinder cap (2), second groove (16) set up on cylinder body (1), first groove (15) with second groove (16) intercommunication, work as cylinder cap (2) with when cylinder body (1) are connected, the one end of first sealing washer (6) is inserted and is established in first groove (15), the other end of first sealing washer (6) is inserted and is established in second groove (16).

3. A sealed, leak-proof hydraulic cylinder as defined in claim 2, wherein: the inner wall of the second groove (16) is connected with a positioning column (17), a positioning groove (18) is formed in the first sealing ring (6), and the positioning column (17) is inserted into the positioning groove (18).

4. A sealed, leak-proof hydraulic cylinder, as defined in claim 1, wherein: the cylinder body (1) is provided with a placing groove, the placing groove is located between the mounting groove (14) and the cylinder bottom (3), a second sealing ring (20) is connected in the placing groove, the second sealing ring (20) is sleeved on the piston rod (5), and the inner wall of the second sealing ring (20) is attached to the piston rod (5).

5. A hydraulic cylinder of the sealed and leak-proof type as defined in claim 4, wherein: one side of the first sealing ring (6) close to the bottom of the cylinder body (1) is provided with an oil receiving groove (19).

6. A sealed, leak-proof hydraulic cylinder, as defined in claim 5, wherein: connect oil groove (19) to be provided with a plurality of, a plurality of connect oil groove (19) with first sealing washer (6) the central axis is the annular array as the center.

7. A sealed, leak-proof hydraulic cylinder, as defined in claim 1, wherein: be equipped with spread groove (8) on cylinder body (1), spread groove (8) are the annular, the tank bottom of spread groove (8) is connected with sealed pad (9), be connected with connecting pipe (11) on cylinder cap (2), connecting pipe (11) are inserted and are established in spread groove (8), keep away from connecting pipe (11) the one end of cylinder cap (2) is supported tightly sealed pad (9), cylinder cap (2) with cylinder body (1) is connected through bolt (13).

8. A sealed, leak-proof hydraulic cylinder, as defined in claim 1, wherein: the cylinder body (1) is coated with an anti-corrosion coating.