CN211314485U

CN211314485U - Air pump cylinder body with seal structure

Info

Publication number: CN211314485U
Application number: CN201921877451.8U
Authority: CN
Inventors: 戴旭明
Original assignee: Zhenjiang Jinma Pump Co ltd
Current assignee: Zhenjiang Jinma Pump Co ltd
Priority date: 2019-11-04
Filing date: 2019-11-04
Publication date: 2020-08-21
Anticipated expiration: 2029-11-04

Abstract

The utility model discloses an air pump cylinder body with seal structure relates to air pump technical field, the power distribution cylinder comprises a cylinder body, the both sides of cylinder body are provided with first end cover and second end cover respectively, the inside piston rod that extends to the cylinder body inside has been cup jointed to the inside of second end cover, and the end-to-end connection of piston rod has the piston, the sealing ring has been cup jointed in the outside of piston, the outside threaded connection of piston rod has the gland, the outside of piston rod is fixed with the spacing piece, the gasket has been cup jointed in the outside of piston rod. The utility model discloses a with the sealing ring cover in the inboard of spacing groove to screw on the gland, through mutually supporting of internal thread and external screw thread, make the gland constantly be close to the sealing ring, compress tightly fixedly to the sealing ring, guarantee the stable installation of sealing ring, the operation for the staff brings the convenience, and through the setting of sealing ring, makes the leakproofness strengthen between cylinder body inner wall and the piston, through the setting of second sealing washer, prevents that gas from leaking through the second end cover.

Description

Air pump cylinder body with seal structure

Technical Field

The utility model relates to an air pump technical field specifically is an air pump cylinder body with seal structure.

Background

The air pump is a device for removing air from a closed space or adding air from the closed space, an air inlet and an air outlet are arranged on the front side and the rear side of a cylinder body, a piston is arranged in the cylinder body, a sealing ring is arranged between the periphery of the piston and the inner wall of the cylinder body for sealing, the piston and the sealing ring divide the space in the cylinder body into an air suction chamber positioned at the rear part of the cylinder body and a plenum chamber positioned at the front part of the cylinder body, and an engine drives the piston to reciprocate in the cylinder body through a crank so as to.

However, the existing sealing ring is inconvenient to install and brings troubles to the operation of workers, the existing air pump cylinder body is poor in sealing effect, air leaks to influence the normal work of an air pump, and therefore the air pump cylinder body with the sealing structure is provided.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an air pump cylinder body with seal structure to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an air pump cylinder body with seal structure, includes the cylinder body, the both sides of cylinder body are provided with first end cover and second end cover respectively, the inside of second end cover has cup jointed and has extended to the inside piston rod of cylinder body, and the end-to-end connection of piston rod has the piston, the sealing ring has been cup jointed in the outside of piston, the outside threaded connection of piston rod has the gland, the outside of piston rod is fixed with the stopper, the gasket has been cup jointed in the outside of piston rod, and the gasket is located between stopper and the gland, the inside of second end cover is provided with the second sealing washer, the second sealing washer is located the outside of piston rod.

Preferably, the side surface of the piston close to the sealing ring is provided with a limiting groove, and the sealing ring is positioned on the inner side of the limiting groove.

Preferably, the cylinder body passes through the bolt and can dismantle with first end cover and second end cover and be connected, the cylinder body all is provided with first sealing washer with the contact surface of first end cover and second end cover.

Preferably, the outer side of the piston rod is provided with an external thread, and the inner part of the gland is provided with an internal thread matched with the internal thread.

Preferably, the side surface of the gland is in contact with the side surface of the sealing ring, and the side surface of the gland, which is close to the sealing ring, is provided with a latch.

Preferably, the second sealing ring is a lip-shaped sealing ring, and the lip-shaped sealing ring can be Y-shaped, V-shaped, U-shaped and the like.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a with the sealing ring cover in the inboard of spacing groove to the gland of screwing on, through mutually supporting of internal thread and external screw thread, make the gland constantly be close to the sealing ring, compress tightly fixedly to the sealing ring, guarantee the stable installation of sealing ring, the operation for the staff brings the convenience, and through the setting of sealing ring, make the leakproofness strengthen between cylinder body inner wall and the piston, through the setting of second sealing washer, prevent that gas from leaking through the second end cover, make the sealed effect of air pump better, guaranteed the normal work of air pump.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of the present invention A;

fig. 3 is the structure diagram of the pressure ring of the present invention.

In the figure: 1. a cylinder body; 2. a first end cap; 3. a second end cap; 4. a bolt; 5. a first seal ring; 6. A piston rod; 7. a piston; 8. a seal ring; 9. a gland; 10. a limiting block; 11. a gasket; 12. a second seal ring; 13. a limiting groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, an air pump cylinder with a sealing structure includes a cylinder body 1, a first end cap 2 and a second end cap 3 are respectively disposed on two sides of the cylinder body 1, a piston rod 6 extending into the cylinder body 1 is sleeved inside the second end cap 3, a piston 7 is connected to a terminal of the piston rod 6, a sealing ring 8 is sleeved outside the piston 7, a gland 9 is connected to an outside of the piston rod 6 through a thread, a stopper 10 is fixed to an outside of the piston rod 6, a gasket 11 is sleeved outside the piston rod 6, the gasket 11 is located between the stopper 10 and the gland 9, a second sealing ring 12 is disposed inside the second end cap 3, the second sealing ring 12 is located outside the piston rod 6, the second sealing ring 12 is a lip-shaped sealing ring, and can be Y-shaped, V-shaped, U-shaped, and the like, and is suitable for a reciprocating seal to prevent gas from leaking from an outside of, the side that piston 7 is close to sealing ring 8 is provided with spacing groove 13, and sealing ring 8 is located the inboard of spacing groove 13, and spacing groove 13 is convenient for make things convenient for the installation of sealing ring 8 to sealing ring 8's block.

In this embodiment, seal ring 8 is blocked at the inboard of spacing groove 13, screws up gland 9, makes gland 9 compress tightly fixedly to seal ring 8, guarantees seal ring 8's stable installation, and seal ring 8 has guaranteed the leakproofness between piston 7 and the 1 inner wall of cylinder body, prevents gas leakage, has guaranteed the normal work of air pump.

Please refer to fig. 1, the cylinder 1 is detachably connected to the first end cap 2 and the second end cap 3 by bolts 4, and the contact surfaces of the cylinder 1 and the first end cap 2 and the second end cap 3 are provided with first sealing rings 5.

The utility model discloses in, the leakproofness between cylinder body 1 and first end cap 2, the second end cap 3 has been guaranteed to first sealing washer 5, and bolt 4 is convenient to the dismantlement of first end cap 2 and second end cap 3, is convenient for to the maintenance of cylinder body.

Please refer to fig. 1, 2 and 3, the outer side of the piston rod 6 is provided with an external thread, and the inner part of the gland 9 is provided with an internal thread matching with the external thread; the side of gland 9 contacts with the side of sealing ring 8, and the side of gland 9 near sealing ring 8 is provided with the latch.

The utility model discloses in, through mutually supporting of internal thread and external screw thread, be convenient for to screwing of gland 9, make gland 9 compress tightly fixedly to sealing ring 8, and latch increase friction, make the sealing performance between gland 9 and the sealing ring 8 better.

The working principle is as follows: the sealing ring 8 is sleeved on the outer side of the piston 7 and clamped in the limiting groove 13, the piston rod 6 is threaded with the gasket 11, the gasket 11 is attached to the limiting block 10, the press cover 9 is screwed on the piston rod 6, the press cover 9 is continuously close to the sealing ring 8 through the mutual matching of the internal thread and the external thread, the sealing ring 8 is pressed and fixed, the press cover 9 is in contact with the sealing ring 8 through the clamping teeth, the friction is increased, the fastening effect is better, when the piston 7 reciprocates in the cylinder body 1, the sealing performance between the piston 7 and the inner wall of the cylinder body 1 is better due to the arrangement of the sealing ring 8, the second sealing ring 12 is a lip-shaped sealing ring, the lip edge is tightly attached to the sealing surface through the deformation of the lip edge of the lip-shaped sealing ring under the action of hydraulic pressure, the lip edge is more tightly attached to the sealing surface, and the sealing lip edge, the lip seal is therefore suitable for reciprocating dynamic sealing, enabling better sealing between the piston rod 6 and the second end cap 3.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. An air pump cylinder body with seal structure, includes cylinder body (1), its characterized in that: the two sides of the cylinder body (1) are respectively provided with a first end cover (2) and a second end cover (3), a piston rod (6) extending to the inside of the cylinder body (1) is sleeved inside the second end cover (3), the tail end of the piston rod (6) is connected with a piston (7), a sealing ring (8) is sleeved outside the piston (7), a gland (9) is connected outside the piston rod (6) in a threaded mode, a limiting block (10) is fixed outside the piston rod (6), a gasket (11) is sleeved outside the piston rod (6), the gasket (11) is located between the limiting block (10) and the gland (9), a second sealing ring (12) is arranged inside the second end cover (3), and the second sealing ring (12) is located outside the piston rod (6).

2. The air pump cylinder with a sealing structure according to claim 1, wherein: the side face, close to the sealing ring (8), of the piston (7) is provided with a limiting groove (13), and the sealing ring (8) is located on the inner side of the limiting groove (13).

3. The air pump cylinder with a sealing structure according to claim 1, wherein: the cylinder body (1) is detachably connected with the first end cover (2) and the second end cover (3) through bolts (4), and the cylinder body (1) is provided with a first sealing ring (5) on the contact surface of the first end cover (2) and the second end cover (3).

4. The air pump cylinder with a sealing structure according to claim 1, wherein: the outer side of the piston rod (6) is provided with an external thread, and the inner part of the gland (9) is provided with an internal thread matched with the internal thread.

5. The air pump cylinder with a sealing structure according to claim 1, wherein: the side of gland (9) contacts with the side of sealing ring (8), and the side that gland (9) is close to sealing ring (8) is provided with the latch.

6. The air pump cylinder with a sealing structure according to claim 1, wherein: the second sealing ring (12) is a lip-shaped sealing ring, and the lip-shaped sealing ring can be Y-shaped, V-shaped, U-shaped and the like.