CN210889547U

CN210889547U - Sealing structure for pull rod hydraulic cylinder

Info

Publication number: CN210889547U
Application number: CN201922090378.6U
Authority: CN
Inventors: 唐国红
Original assignee: Wuxi Aosailin Hydraulic Technology Co ltd
Current assignee: Wuxi Aosailin Hydraulic Technology Co ltd
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-06-30
Anticipated expiration: 2029-11-28

Abstract

The utility model discloses a seal structure for pull rod pneumatic cylinder, including the bottom, the upper end of bottom is provided with the cylinder, the outside of the cylinder of the upper end surface of bottom is provided with the sealing washer, the inner wall department of the cylinder of the upper end surface of bottom is provided with sealed dish, be provided with sealing mechanism between cylinder and the bottom, the upper end of cylinder is provided with the top cap, the upper end corner of top cap all runs through with the surface corner of bottom and is provided with the thread fixing column, the upper and lower both ends of thread fixing column are screwed and are had fixation nut, the inside of bottom is provided with strengthening mechanism. A seal structure for pull rod pneumatic cylinder, can improve the sealing performance between bottom and the cylinder, and can improve the shock resistance of bottom.

Description

Sealing structure for pull rod hydraulic cylinder

Technical Field

The utility model relates to a pull rod pneumatic cylinder field, in particular to a seal structure for pull rod pneumatic cylinder.

Background

The pull rod hydraulic cylinder is a hydraulic actuator which converts hydraulic energy into mechanical energy and makes linear reciprocating motion. The hydraulic system has simple structure and reliable work, thereby being widely applied to hydraulic systems of various machines; the existing sealing structure for the pull rod hydraulic cylinder has certain defects when in use, a gap exists between a cylinder barrel and a bottom cover on the pull rod hydraulic cylinder, the sealing performance is poor, the gap in the working matching process is easy to increase, the use precision of the pull rod hydraulic cylinder is affected, the shock resistance of the bottom cover is poor, certain adverse effects are brought to practical use, and therefore the sealing structure for the pull rod hydraulic cylinder is provided.

SUMMERY OF THE UTILITY MODEL

A primary object of the present invention is to provide a sealing structure for a drawbar hydraulic cylinder, which can effectively solve the problems in the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a seal structure for pull rod pneumatic cylinder, includes the bottom, the upper end of bottom is provided with the cylinder, the outside of the cylinder of the upper end surface of bottom is provided with the sealing washer, the inner wall department of the cylinder of the upper end surface of bottom is provided with sealed dish, be provided with sealing mechanism between cylinder and the bottom, the upper end of cylinder is provided with the top cap, the upper end corner of top cap all runs through with the surface corner of bottom and is provided with the thread fixing post, the upper and lower both ends of thread fixing post are screwed there is fixation nut, the inside of bottom is provided with strengthening mechanism.

Preferably, the outer surface of the lower end of the top cover is fixedly connected with the outer surface of the upper end of the cylinder barrel through the threaded fixing columns and the fixing nuts, and the number of the threaded fixing columns is four.

Preferably, sealing mechanism is including seting up the spread groove at the upper end surface of bottom and seting up the seal groove at the lower extreme surface of cylinder, and the cylinder is located the inside of spread groove, the inside of the seal groove of the inside bottom surface of spread groove is provided with sealed piece, the inboard surface of spread groove and the surface of sealed piece all are provided with the rubber pad.

Preferably, the outer surface of the upper end of the bottom cover is fixedly connected with the outer surface of the lower end of the cylinder barrel through a threaded fixing column and a fixing nut, the outer surface of the inner side of the sealing ring is attached to the outer surface of the cylinder barrel, and the outer surface of the sealing disc is attached to the outer surface of the inner side of the cylinder barrel.

Preferably, the reinforcing mechanism comprises a reinforcing frame located inside the bottom cover, a conducting plate is mounted at a corner of the upper end of the reinforcing frame, a conducting post is arranged at the center of the outer surface of the upper end of the reinforcing frame, and reinforcing blocks are arranged on the upper end surface of the conducting post and the upper end surface of the conducting plate.

Preferably, the outer surface of the lower end of the reinforcing block is fixedly connected with the outer surface of the upper end of the reinforcing frame through a conductive plate and a conductive column, and the conductive plate is connected with the reinforcing frame in a welding mode.

Compared with the prior art, the utility model discloses following beneficial effect has: because the sealing mechanism is arranged, when the bottom cover is assembled on the cylinder barrel, the lower end of the cylinder barrel is positioned in the connecting groove, so that the connecting part between the bottom cover and the cylinder barrel is sealed for the first time through the sealing ring and the sealing disc, meanwhile, the sealing block at the bottom of the connecting groove enters the sealing groove at the bottom of the cylinder barrel for secondary sealing, and the gaps formed after the cylinder barrel is connected with the sealing ring, the sealing disc, the connecting groove and the sealing block and the sealing groove are sealed for the second time through the rubber pads, thereby achieving the advantage of improving the sealing performance between the bottom cover and the cylinder barrel, because the strengthening mechanism is arranged, when the bottom cover is impacted, the strengthening block can bear the impact force applied to the bottom cover, and the impact force is transmitted to the strengthening frame through the conducting plate and the conducting post, the strengthening frame can bear the impact force again, and the phenomenon that the bottom cover is perforated due to the overlarge, thereby achieving the advantage that the shock resistance of the bottom cover is improved, and the using effect is better than that of the traditional mode.

Drawings

Fig. 1 is a schematic overall structure diagram of a sealing structure for a pull rod hydraulic cylinder according to the present invention;

fig. 2 is a cross-sectional view of the cylinder barrel and the bottom cover of the sealing structure for the hydraulic cylinder of the pull rod of the present invention;

fig. 3 is a schematic view of a reinforcing mechanism of a sealing structure for a rod hydraulic cylinder according to the present invention;

fig. 4 is a schematic view of the bottom cover of the sealing structure for the drawbar hydraulic cylinder according to the present invention.

In the figure: 1. a bottom cover; 2. a seal ring; 3. a cylinder barrel; 4. a threaded fixing column; 5. a top cover; 6. fixing a nut; 7. a reinforcing mechanism; 71. a reinforcing frame; 72. a conductive plate; 73. a reinforcing block; 74. a guide post; 8. sealing the disc; 9. a sealing mechanism; 91. connecting grooves; 92. a sealing groove; 93. a sealing block; 94. and (7) a rubber pad.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

As shown in fig. 1-4, a sealing structure for a pull rod hydraulic cylinder comprises a bottom cover 1, a cylinder barrel 3 is arranged at the upper end of the bottom cover 1, a sealing ring 2 is arranged on the outer side of the cylinder barrel 3 on the outer surface of the upper end of the bottom cover 1, a sealing disc 8 is arranged on the inner wall of the cylinder barrel 3 on the outer surface of the upper end of the bottom cover 1, a sealing mechanism 9 is arranged between the cylinder barrel 3 and the bottom cover 1, a top cover 5 is arranged at the upper end of the cylinder barrel 3, a threaded fixing column 4 is arranged at the upper end corner of the top cover 5 and the outer surface corner of the bottom cover 1 in a penetrating manner, fixing nuts 6.

The lower extreme surface of top cap 5 passes through the upper end surface fixed connection of screw thread fixed column 4, fixation nut 6 and cylinder 3, and the quantity of screw thread fixed column 4 is four groups, and screw thread fixed column 4, fixation nut 6 play the effect of fixed top cap 5, bottom 1.

Preferably, the sealing mechanism 9 includes a connecting groove 91 formed in the outer surface of the upper end of the bottom cover 1 and a sealing groove 92 formed in the outer surface of the lower end of the cylinder 3, the cylinder 3 is located inside the connecting groove 91, a sealing block 93 is arranged inside the sealing groove 92 in the bottom surface of the connecting groove 91, rubber pads 94 are arranged on the outer surfaces of the inner side of the connecting groove 91 and the sealing block 93, the sealing groove 92, the connecting groove 91 and the sealing block 93 play a role in sealing, and the rubber pads 94 play a role in strengthening sealing.

Preferably, the outer surface of the upper end of the bottom cover 1 is fixedly connected with the outer surface of the lower end of the cylinder barrel 3 through the thread fixing column 4 and the fixing nut 6, the outer surface of the inner side of the sealing ring 2 is attached to the outer surface of the cylinder barrel 3, the outer surface of the sealing disc 8 is attached to the outer surface of the inner side of the cylinder barrel 3, and the sealing disc 8 and the sealing ring 2 play a role in sealing.

Preferably, the reinforcing mechanism 7 includes a reinforcing frame 71 located inside the bottom cover 1, a conductive plate 72 is mounted at an upper corner of the reinforcing frame 71, a conductive post 74 is disposed at a central position of an outer surface of an upper end of the reinforcing frame 71, and a reinforcing block 73, the conductive post 74 and the conductive plate 72 are disposed on an upper end surface of the conductive post 74 and an upper end surface of the conductive plate 72 to conduct an impact force.

Preferably, the outer surface of the lower end of the reinforcing block 73 is fixedly connected with the outer surface of the upper end of the reinforcing frame 71 through the conductive plate 72 and the conductive column 74, the conductive plate 72 is connected with the reinforcing frame 71 through welding, and the reinforcing block 73 and the reinforcing frame 71 play a role in bearing impact force.

It should be noted that, the utility model relates to a sealing structure for a pull rod hydraulic cylinder, when in use, a user can install the pull rod hydraulic cylinder at a position to be used, when the bottom cover 1 at the lower end of the cylinder 3 is impacted, the reinforcing block 73 can bear the impact force on the bottom cover 1, the impact force is transmitted to the reinforcing frame 71 through the conducting plate 72 and the conducting post 74, the impact force is borne again through the reinforcing frame 71, the phenomenon that the bottom cover 1 is perforated due to the overlarge impact force in the using process is avoided, and when the bottom cover 1 is assembled on the cylinder 3, the lower end of the cylinder 3 can be positioned inside the connecting groove 91, so that the connecting part between the bottom cover 1 and the cylinder 3 is sealed once through the sealing ring 2 and the sealing disc 8, and the sealing block 93 at the bottom of the connecting groove 91 enters the sealing groove 92 at the bottom of the cylinder 3 for secondary sealing, and through its rubber pad 94 to cylinder 3 and sealing washer 2, sealed dish 8, spread groove 91 and sealed block 93 and seal groove 92 between be connected the gap after sealed again to this reaches its sealing performance who improves between bottom 1 and the cylinder 3, with the precision of guaranteeing this pull rod pneumatic cylinder, comparatively practical.

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. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A seal structure for a tie-rod hydraulic cylinder, comprising a bottom cover (1), characterized in that: the upper end of bottom (1) is provided with cylinder (3), the outside of the cylinder (3) of the upper end surface of bottom (1) is provided with sealing washer (2), the inner wall department of cylinder (3) of the upper end surface of bottom (1) is provided with sealed dish (8), be provided with sealing mechanism (9) between cylinder (3) and bottom (1), the upper end of cylinder (3) is provided with top cap (5), the upper end corner of top cap (5) all runs through with the surface corner of bottom (1) and is provided with screw thread fixing post (4), the upper and lower both ends of screw thread fixing post (4) are screwed and are had fixation nut (6), the inside of bottom (1) is provided with strengthening mechanism (7).

2. A seal structure for a tie rod hydraulic cylinder according to claim 1, characterized in that: the outer surface of the lower end of the top cover (5) is fixedly connected with the outer surface of the upper end of the cylinder barrel (3) through the thread fixing columns (4) and the fixing nuts (6), and the number of the thread fixing columns (4) is four.

3. A seal structure for a tie rod hydraulic cylinder according to claim 1, characterized in that: sealing mechanism (9) are including seting up in connecting groove (91) of the upper end surface of bottom (1) and seting up in seal groove (92) of the lower extreme surface of cylinder (3), and cylinder (3) are located the inside of connecting groove (91), the inside of seal groove (92) of the inside bottom surface of connecting groove (91) is provided with sealed piece (93), the inboard surface of connecting groove (91) and the surface of sealed piece (93) all are provided with rubber pad (94).

4. A seal structure for a tie rod hydraulic cylinder according to claim 1, characterized in that: the outer surface of the upper end of the bottom cover (1) is fixedly connected with the outer surface of the lower end of the cylinder barrel (3) through a thread fixing column (4) and a fixing nut (6), the outer surface of the inner side of the sealing ring (2) is attached to the outer surface of the cylinder barrel (3), and the outer surface of the sealing disc (8) is attached to the outer surface of the inner side of the cylinder barrel (3).

5. A seal structure for a tie rod hydraulic cylinder according to claim 1, characterized in that: the reinforcing mechanism (7) comprises a reinforcing frame (71) located inside the bottom cover (1), a conducting plate (72) is installed at the corner of the upper end of the reinforcing frame (71), a conducting post (74) is arranged at the center of the outer surface of the upper end of the reinforcing frame (71), and reinforcing blocks (73) are arranged on the upper end face of the conducting post (74) and the upper end face of the conducting plate (72).

6. A seal structure for a tie rod hydraulic cylinder according to claim 5, characterized in that: the outer surface of the lower end of the reinforcing block (73) is fixedly connected with the outer surface of the upper end of the reinforcing frame (71) through a conductive plate (72) and a conductive column (74), and the conductive plate (72) is connected with the reinforcing frame (71) in a welding mode.