CN210769641U

CN210769641U - Novel buffering hydraulic cylinder

Info

Publication number: CN210769641U
Application number: CN201922001380.1U
Authority: CN
Inventors: 李钢; 鲁海石; 陈素娟; 宛锐
Original assignee: FUSHUN TIANBAO HEAVY INDUSTRY HYDRAULIC MANUFACTURING CO LTD
Current assignee: FUSHUN TIANBAO HEAVY INDUSTRY HYDRAULIC MANUFACTURING CO LTD
Priority date: 2019-11-19
Filing date: 2019-11-19
Publication date: 2020-06-16
Anticipated expiration: 2029-11-19

Abstract

The utility model discloses a novel buffering pneumatic cylinder, including cylinder body and piston, the inside piston that is provided with of cylinder body, and conical head before piston one side fixed surface is connected with. Has the advantages that: the utility model discloses a roof, the blotter, preceding conical head and back conical head, at the in-process of piston back-and-forth movement, preceding conical head and back conical head remove inside front end housing and rear end cap, carry out the buffering for the first time, the piston at this moment continues to remove, spring compression absorbed energy, carry out the secondary buffering, current conical head gets into inside back of front end housing or rear end cap respectively with back conical head completely, preceding conical head contacts with preceding rubber pad and back rubber pad respectively with back conical head, preceding rubber pad warp the energy of absorbing once more with back rubber pad, carry out the cubic buffering, this device has adopted many times multistage buffering, the buffering effect is more obvious for traditional single buffering, mechanical impact between piston and front end housing and the rear end cap has fully been avoided, service life is prolonged.

Description

Novel buffering hydraulic cylinder

Technical Field

The utility model relates to a buffer hydraulic cylinder technical field particularly, relates to a novel buffer hydraulic cylinder.

Background

The buffering hydraulic cylinder is a hydraulic cylinder buffering device arranged in the hydraulic cylinder, and due to the arrangement of the buffering device, even if external force is applied to the hydraulic cylinder, the situation that the pressure is higher than the design strength of the hydraulic cylinder can not occur, when the piston moves to one end distance before a terminal, hydraulic oil in an oil discharge cavity is blocked, the hydraulic oil is forced to flow out from a gap or a throttling small hole, the oil discharge resistance is increased, and the movement speed of the piston is reduced.

Traditional buffering pneumatic cylinder adopts the mode of control hydraulic oil pressure to cushion, and the buffering mode is single, and the buffering is the single buffering, and buffering effect is limited, and simultaneously, the end cover of traditional pneumatic cylinder adopts bolt and cylinder body fixed connection, when using for a long time, especially suffers piston collision and hydraulic oil pressure influence for a long time, and difficult the inevitable can produce not hard up phenomenon to lead to the emergence of the accident of oil leak, structural stability can also further make the improvement.

An effective solution to the problems in the related art has not been proposed yet.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The not enough to prior art, the utility model provides a novel buffering pneumatic cylinder possesses multistage buffering, effectual, the stable in structure's of buffering advantage, and then solves the problem among the above-mentioned background art.

(II) technical scheme

For realizing the advantages of the above multistage buffering, good buffering effect and stable structure, the utility model discloses a concrete technical scheme as follows:

a novel buffer hydraulic cylinder comprises a cylinder body and a piston, wherein the piston is arranged in the cylinder body, a front conical head is fixedly connected to one side surface of the piston, a rear conical head is fixedly connected to the other side surface of the piston, a piston rod is fixedly connected to one side surface of the piston, a front end cover and a rear end cover are fixedly connected to two ends of the cylinder body respectively, a front throttling small hole, a front liquid inlet and a front liquid outlet are connected to the surface of the front end cover in a penetrating manner, a rear throttling small hole, a rear liquid inlet and a rear liquid outlet are connected to the surface of the rear end cover in a penetrating manner, the piston rod penetrates through the central position of the surface of the front end cover and extends out of the front end cover, moving grooves are formed in the surfaces of the front end cover and the rear end cover, sliding rails are fixedly installed on the inner walls of the moving, the other end of the guide rod is fixedly connected with a top plate, a cushion pad is fixedly arranged on the surface of the other side of the top plate, a spring is arranged between the top plate and the inner wall of the moving groove, a front rubber pad is fixedly connected to the inner wall of the front end cover corresponding to the position of the front conical head, and a rear rubber pad is fixedly connected to the inner wall of the rear end cover corresponding to the position of the rear conical head.

Furthermore, fixed blocks are fixedly welded on the outer surface of the front end cover and the outer surface of the rear end cover and are fixedly connected with each other through a pulling bolt.

Furthermore, the surfaces of the front liquid outlet and the rear liquid outlet are respectively provided with an electromagnetic valve.

Furthermore, check valves are arranged on the surfaces of the front liquid inlet and the rear liquid inlet.

Furthermore, the friction plate is made of metal materials, and the surface of the friction plate is of a rough wiping structure.

Furthermore, the blotter adopts the silica gel material to make.

(III) advantageous effects

Compared with the prior art, the utility model provides a novel buffering pneumatic cylinder possesses following beneficial effect:

(1) the utility model adopts the top plate, the buffer cushion, the front conical head and the rear conical head, in the process of the back and forth movement of the piston, the front conical head and the rear conical head move to the inner parts of the front end cover and the rear end cover, the front liquid outlet and the rear liquid outlet are closed or limited at the moment, hydraulic oil is forced to flow out from the front throttling small hole and the rear throttling small hole, the speed of the front conical head and the rear conical head entering the inner parts of the front end cover and the rear end cover is reduced, thereby carrying out the first buffering, the piston continues to move at the moment, the buffer cushion and the top plate are abutted, the top plate pushes the guide rod to move towards the inner part of the moving groove, the spring is compressed, in the process that the guide rod moves towards the moving groove, the guide rod is contacted with the friction plate, the spring is prevented from repeatedly rebounding, the spring is compressed to absorb energy, the secondary buffering is carried out, after the front conical head and the rear conical head, the front rubber pad and the rear rubber pad deform to absorb energy again for buffering three times, multiple-stage buffering is adopted in the device, the buffering effect is more obvious compared with traditional single buffering, mechanical impact between the piston and the front end cover and between the piston and the rear end cover is fully avoided, and the service life is prolonged.

(2) The utility model discloses a fixed block and draw the bolt, fixed block fixed mounting is tied fixed connection at front end housing and rear end housing surface through drawing to taut front end housing and rear end housing avoid long-time use front end housing and rear end housing to take place not hard up phenomenon, have further improved the structural stability of this device, have improved sealing performance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural view of a novel buffer hydraulic cylinder provided by the present invention;

fig. 2 is a front view of a novel buffer hydraulic cylinder provided by the invention;

fig. 3 is a sectional view of the moving chute of the present invention.

In the figure:

1. a cylinder body; 2. a piston rod; 3. a front conical head; 4. a piston; 5. a rear conical head; 6. a rear orifice; 7. a liquid inlet; 8. a rear end cap; 9. a rear rubber pad; 10. a rear liquid outlet; 11. a front liquid outlet; 12. a front rubber pad; 13. a front end cover; 14. a front orifice; 15. a liquid inlet; 16. a guide bar; 17. a cushion pad; 18. a top plate; 19. a spring; 20. a slide rail; 21. a moving groove; 22. a fixed block; 23. pulling the bolt; 24. a friction plate.

Detailed Description

For further explanation of the embodiments, the drawings are provided as part of the disclosure and serve primarily to illustrate the embodiments and, together with the description, to explain the principles of operation of the embodiments, and to provide further explanation of the invention and advantages thereof, it will be understood by those skilled in the art that various other embodiments and advantages of the invention are possible, and that elements in the drawings are not to scale and that like reference numerals are generally used to designate like elements.

According to the utility model discloses an embodiment provides a novel buffering pneumatic cylinder.

Referring now to the drawings and the detailed description, as shown in fig. 1-3, according to the embodiment of the present invention, a novel hydraulic cushion cylinder includes a cylinder body 1 and a piston 4, the piston 4 is disposed inside the cylinder body 1, a front cone 3 is fixedly connected to one side surface of the piston 4, a rear cone 5 is fixedly connected to the other side surface of the piston 4, the front cone 3 and the rear cone 5 are conical structures, when cushioning is performed, the throttle area is reduced along with the increase of the cushion stroke, so that the mechanical energy is absorbed more uniformly, the cushion effect is good, a piston rod 2 is fixedly connected to one side surface of the piston 4 through the front cone 3, a front end cap 13 and a rear end cap 8 are respectively fixedly connected to the two ends of the cylinder body 1, a front throttle hole 14, a front liquid inlet 15 and a front liquid outlet 11 are connected to the surface of the front end cap 13, and a rear throttle hole 6 is connected to the surface of the rear end cap 8, A rear liquid outlet 7 and a rear liquid outlet 10, which are common structures in the art and will not be described in detail herein, the piston rod 2 penetrates through the center of the surface of the front end cover 13 and extends outside the front end cover 13, the surfaces of the front end cover 13 and the rear end cover 8 are both provided with a moving groove 21, the inner wall of the moving groove 21 is fixedly provided with a slide rail 20, the inner wall of the slide rail 20 is fixedly provided with a friction plate 24, the inside of the slide rail 20 is slidably connected with a guide rod 16, the guide rod 16 abuts against the friction plate 24, the guide rod 16 rubs against the friction plate 24 when moving, the other end of the guide rod 16 is fixedly connected with a top plate 18, the other side surface of the top plate 18 is fixedly provided with a cushion 17, a spring 19 is arranged between the top plate 18 and the inner wall of the moving groove 21, the inner wall of the front end cover, in the process of moving the piston 4 back and forth, the front conical head 3 and the rear conical head 5 move to the inner parts of the front end cover 13 and the rear end cover 8, the front liquid outlet 11 and the rear liquid outlet 10 are closed or limited at the moment, hydraulic oil is forced to flow out of the front throttling small hole 14 and the rear throttling small hole 6, the speed of the front conical head 3 and the rear conical head 5 entering the inner parts of the front end cover 13 and the rear end cover 8 is reduced, so that the first buffering is performed, the piston 4 at the moment continues to move to abut against the buffer pad 17 and the top plate 18, the top plate 18 pushes the guide rod 16 to move towards the inner part of the moving groove 21, the spring 19 is compressed, the guide rod 16 is in contact with the friction plate 24 in the process that the guide rod 16 moves towards the moving groove 21, the repeated rebound of the spring 19 is avoided, the spring 19 compresses to absorb energy for secondary buffering, the front conical head 3 and the rear conical head 5 are in contact with the front rubber pad 12 and the rear rubber pad 9, the front rubber pad 12 and the rear rubber pad 9 deform to absorb energy again for buffering three times, multiple-stage buffering is adopted in the device, the buffering effect is more obvious compared with traditional single buffering, mechanical impact between the piston 4 and the front end cover 13 and between the piston and the rear end cover 8 is fully avoided, and the service life is prolonged.

In one embodiment, the fixed blocks 22 are fixedly welded on the outer surface of the front end cover 13 and the outer surface of the rear end cover 8, the fixed blocks 22 are fixedly connected through the pulling bolts 23, the pulling bolts 23 are common structures, too much description is not repeated here, the fixed blocks 22 are fixedly installed on the surfaces of the front end cover 13 and the rear end cover 8 and are fixedly connected through the pulling bolts 23, so that the front end cover 13 and the rear end cover 8 are tensioned, the phenomenon that the front end cover 13 and the rear end cover 8 are loosened after long-time use is avoided, the structural stability of the device is further improved, and the sealing performance is improved.

In one embodiment, electromagnetic valves are disposed on the surfaces of the front liquid outlet 11 and the rear liquid outlet 10, so as to control the opening and closing of the front liquid outlet 11 and the rear liquid outlet 10.

In one embodiment, the surfaces of the front fluid inlet 15 and the rear fluid inlet 7 are both provided with check valves to prevent the hydraulic oil from flowing reversely to cause leakage, which is a common structure and will not be described herein.

In one embodiment, the friction plate 24 is made of metal, and the surface of the friction plate 24 is rough, so that the guide rod 16 and the friction plate 24 rub against each other to generate resistance, thereby preventing the spring 19 from repeatedly extending and retracting.

In one embodiment, the cushion pad 17 is made of silicone and deforms when the piston 4 contacts the top plate 18, so as to cushion the impact between the piston 4 and the top plate 18 and prolong the service life of the top plate 18 and the piston 4.

The working principle is as follows:

the device is installed to a proper position, in the process of moving the piston 4 back and forth, the front conical head 3 and the rear conical head 5 move to the inner parts of the front end cover 13 and the rear end cover 8, the front liquid outlet 11 and the rear liquid outlet 10 are closed or limited at the moment, hydraulic oil is forced to flow out of the front throttling small hole 14 and the rear throttling small hole 6, the speed of the front conical head 3 and the rear conical head 5 entering the inner parts of the front end cover 13 and the rear end cover 8 is reduced, so that the first buffering is carried out, the piston 4 continues to move at the moment, the top plate 18 pushes the guide rod 16 to move towards the inner part of the moving groove 21, the spring 19 is compressed, the guide rod 16 is in contact with the friction plate 24 in the process that the guide rod 16 moves towards the moving groove 21, the repeated rebound of the spring 19 is avoided, the spring 19 compresses to absorb energy, the secondary buffering is carried out, and after the front conical head 3 and the rear conical, preceding cone 3 and back cone 5 respectively with preceding rubber pad 12 and the contact of back rubber pad 9, preceding rubber pad 12 and the deformation of back rubber pad 9 absorb energy once more, carry out the cubic buffering, this device has adopted many times multistage buffering, the cushioning effect is more obvious for traditional single buffering, mechanical impact between piston 4 and front end housing 13 and the rear end housing 8 has fully been avoided, service life is prolonged, and simultaneously, fixed block 22 fixed mounting is on front end housing 13 and the 8 surfaces of rear end housing, through 23 fixed connection of blind-bolts, thereby taut front end housing 13 and rear end housing 8, avoid long-time use front end housing 13 and the 8 emergence of rear end housing not hard up phenomena, the structural stability of this device has further been improved, sealing performance has been improved.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The novel buffer hydraulic cylinder is characterized by comprising a cylinder body (1) and a piston (4), wherein the piston (4) is arranged inside the cylinder body (1), one side surface of the piston (4) is fixedly connected with a front conical head (3), the other side surface of the piston (4) is fixedly connected with a rear conical head (5), one side surface of the piston (4) penetrates through the front conical head (3) and is fixedly connected with a piston rod (2), two ends of the cylinder body (1) are respectively and fixedly connected with a front end cover (13) and a rear end cover (8), the surface of the front end cover (13) is in through connection with a front throttling small hole (14), a front liquid inlet (15) and a front liquid outlet (11), the surface of the rear end cover (8) is in through connection with a rear throttling small hole (6), a rear liquid inlet (7) and a rear liquid outlet (10), and the piston rod (2) penetrates through the central position of the surface of the front end cover, the utility model discloses a front end cover (13) and rear end cover (8) are including front end cover (13) and rear end cover (8) surface, and moving groove (21) inner wall fixed mounting has slide rail (20) to slide rail (20) inner wall fixed mounting has friction plate (24), slide rail (20) inside sliding connection has guide arm (16), and guide arm (16) and friction plate (24) butt, guide arm (16) other end fixedly connected with roof (18), and roof (18) other side surface fixed mounting has blotter (17) to be provided with spring (19) between roof (18) and moving groove (21) inner wall, front end cover (13) inner wall corresponds preceding cone head (3) position fixedly connected with preceding rubber pad (12), rear end cover (8) inner wall corresponds back cone head (5) position fixedly connected with back rubber pad (9).

2. A novel buffering hydraulic cylinder as claimed in claim 1, characterized in that fixed blocks (22) are fixedly welded on the outer surfaces of the front end cover (13) and the rear end cover (8), and the fixed blocks (22) are fixedly connected with each other through tie bolts (23).

3. A novel buffer hydraulic cylinder as claimed in claim 1, characterized in that the surfaces of the front liquid outlet (11) and the rear liquid outlet (10) are provided with electromagnetic valves.

4. A novel cushion hydraulic cylinder as claimed in claim 1, characterized in that the surfaces of the front liquid inlet (15) and the rear liquid inlet (7) are provided with one-way valves.

5. The novel buffer hydraulic cylinder as claimed in claim 1, wherein the friction plate (24) is made of metal, and the surface of the friction plate (24) is of a rough wiping structure.

6. A new hydraulic cushion cylinder according to claim 1, characterized in that the cushion pad (17) is made of silicone.