CN211924617U

CN211924617U - Hydraulic cylinder with buffer function

Info

Publication number: CN211924617U
Application number: CN201922057554.6U
Authority: CN
Inventors: 张艳成; 耿瑞飞; 刘中洲; 耿继财
Original assignee: Xuzhou Zhongye Hydraulic Technology Co ltd
Current assignee: Xuzhou Zhongye Hydraulic Technology Co ltd
Priority date: 2019-11-26
Filing date: 2019-11-26
Publication date: 2020-11-13
Anticipated expiration: 2029-11-26

Abstract

The utility model discloses a hydraulic cylinder with buffer function, which belongs to the field of hydraulic cylinders and comprises a cylinder bottom and a cylinder cover, wherein a cylinder barrel is integrally installed at the upper end of the cylinder bottom, a piston is sleeved outside the tail end of a piston rod, the inner wall of the upper end of the cylinder barrel is provided with a guide sleeve, the cylinder cover is positioned at the upper end of the cylinder barrel, a dustproof sleeve is installed inside a hole groove, a connecting pipe is welded at the upper end of the cylinder cover, and a sleeve disc is fixedly installed outside the upper end of the piston rod; the utility model discloses, when the piston rod contracts, the set dish in the piston rod upper end outside descends thereupon, receives stopping of gag lever post and can't descend again when the set dish descends to the gag lever post position, and the piston of piston rod lower extreme has reached maximum shrinkage degree this moment, through the spacing cooperation between gag lever post and the set dish, can avoid the piston rod to touch to the cylinder bottom, and buffer gear sets up in the hydraulic cylinder outside among the device, can carry out timely regulation to it when buffer gear appears the deviation.

Description

Hydraulic cylinder with buffer function

Technical Field

The utility model relates to a hydraulic cylinder technical field specifically is a hydraulic cylinder with buffer function.

Background

The hydraulic cylinder is a hydraulic actuating element which converts hydraulic energy into mechanical energy and does linear reciprocating motion (or swinging motion), has simple structure and reliable work, can omit a speed reducer when realizing reciprocating motion, has no transmission clearance and moves stably, thereby being widely applied to various mechanical hydraulic systems, and the output force of the hydraulic cylinder is in direct proportion to the effective area of a piston and the pressure difference between the two sides of the piston; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder cover, a piston and a piston rod, a sealing device, a buffering device and an exhaust device.

The prior art has the following problems: 1. the hydraulic oil cylinder generally adopts a spring to realize the internal buffering effect, the elastic effect of the spring is limited, the elastic force of the spring is reduced after long-term use, the buffering function is reduced along with the reduction of the elastic force, and 2, a hydraulic oil cylinder buffering mechanism is generally arranged in the oil cylinder, and the buffering distance is fixed and cannot be adjusted.

SUMMERY OF THE UTILITY MODEL

To solve the problems set forth in the background art described above. The utility model provides a hydraulic cylinder with buffer function has outside adjusting piston rod contraction distance, guarantees buffer gear's long-term validity's characteristics.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a hydraulic cylinder with buffer function, includes cylinder bottom and cylinder cap, the cylinder is installed in the upper end integration of cylinder bottom, and the internally mounted of cylinder has a piston rod, the piston has been cup jointed in the terminal outside of piston rod, and the outside of piston has cup jointed the ring that wear-resistants, the upper end inner wall of cylinder is provided with the uide bushing, the cylinder cap is located the upper end of cylinder, and the inside of cylinder cap has seted up the hole groove, the internally mounted of hole groove has the dirt proof boot, and the below of dirt proof boot is provided with the seal cover, the upper end welding of cylinder cap has the connecting pipe, and the surface winding of connecting pipe has the fillet of screw, the outside of fillet of screw has connect the gag lever post soon, and one side of gag lever post covers there is the.

Preferably, the vertical center line of the cylinder barrel coincides with the vertical center line of the piston rod, and the piston rod is connected with the antiwear ring through the piston.

Preferably, the cylinder cover is connected with the dustproof sleeve through the hole groove, and the inner surface of the dustproof sleeve is attached to the outer surface of the piston rod.

Preferably, the inner diameter of the connecting pipe is larger than the outer diameter of the piston rod, and the connecting pipe is in threaded connection with the limiting rod through a threaded ring.

Preferably, the limiting rod is of an internal hollow body structure, and the upper surface of the limiting rod is attached to the lower surface of the rubber cushion layer.

Preferably, the vertical central line of the sleeve disc and the vertical central line of the limiting rod are positioned on the same horizontal line, and the inner diameter of the sleeve disc is equal to the outer diameter of the piston rod.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses: the surface of piston has cup jointed the ring of wearing in the device, and the setting of ring of wearing can avoid the piston direct and the inner wall laminating of cylinder, and when piston rod and piston up-and-down motion, the ring of wearing and tearing of piston by the cylinder inner wall can be avoided to the ring of wearing to prolong the life of piston.

2. The utility model discloses: when the piston rod contracts, the sleeve disc on the outer side of the upper end of the piston rod descends along with the piston rod, when the sleeve disc descends to the position of the limiting rod, the sleeve disc is blocked by the limiting rod and cannot descend again, the piston at the lower end of the piston rod reaches the maximum contraction degree, and the piston rod can be prevented from touching the cylinder bottom through the limiting matching between the limiting rod and the sleeve disc, so that the cylinder bottom is prevented from being impacted inside, and the service life of the device is prolonged.

3. The utility model discloses: be provided with the rubber cushion layer between gag lever post and the retainer plate, the setting of rubber cushion layer can avoid the retainer plate striking gag lever post to cause the noise and damage, because the gag lever post is adjustable at the position on connecting pipe surface, consequently can adjust the maximum shrinkage degree of piston rod according to actual conditions, and buffer gear sets up in the device in the hydraulic cylinder outside, can carry out timely regulation to it when buffer gear appears the deviation.

Drawings

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

FIG. 2 is a schematic view of the connection tube structure of the present invention;

fig. 3 is a schematic view of the top view structure of the present invention.

In the figure: 1. a cylinder bottom; 2. a cylinder barrel; 3. a piston rod; 4. a piston; 5. an antiwear ring; 6. a guide sleeve; 7. a cylinder cover; 8. a hole groove; 9. a dust-proof sleeve; 10. sealing sleeves; 11. a connecting pipe; 12. a thread ring; 13. a limiting rod; 14. a rubber cushion layer; 15. and (5) sleeving a disc.

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, the present invention provides a technical solution: a hydraulic cylinder with a buffer function comprises a cylinder bottom 1 and a cylinder cover 7, wherein the vertical central line of a cylinder barrel 2 coincides with the vertical central line of a piston rod 3, the piston rod 3 is connected with an anti-wear ring 5 through a piston 4, the outer surface of the piston 4 in the hydraulic cylinder is sleeved with the anti-wear ring 5, the anti-wear ring 5 is arranged to prevent the piston 4 from directly attaching to the inner wall of the cylinder barrel 2, when the piston rod 3 and the piston 4 reciprocate up and down, the anti-wear ring 5 can prevent the piston 4 from being worn by the inner wall of the cylinder barrel 2, the service life of the piston 4 is prolonged, the cylinder cover 7 is connected with a dustproof sleeve 9 through a hole groove 8, the inner surface of the dustproof sleeve 9 is attached to the outer surface of the piston rod 3, the hole groove 8 is used for the piston rod 3 to enter the cylinder barrel 2, the dustproof sleeve 9 is arranged to prevent external dust from entering the cylinder barrel 2 through a gap generated between the piston rod, avoid the leakage of the hydraulic oil inside the cylinder 2, thereby using the device to operate for a long time, the inside diameter of the connecting pipe 11 is larger than the outside diameter of the piston rod 3, and the connecting pipe 11 is in threaded connection with the limit rod 13 through the threaded ring 12, the limit rod 13 can rotate up and down on the surface of the connecting pipe 11 through the arrangement of the threaded ring 12, because the inside diameter of the connecting pipe 11 is larger than the outside diameter of the piston rod 3, the connecting pipe 11 can not obstruct the piston rod 3 from moving up and down, the limit rod 13 is arranged in an internal hollow body structure, and the upper surface of the limit rod 13 is attached to the lower surface of the rubber cushion layer 14, the position of the limit rod 13 on the surface of the connecting pipe 11 can be adjusted, the contraction length of the piston rod 3 can be adjusted through the limit rod 13, the vertical central line of the sleeve disk 15 and the vertical central line of the limit rod, when the piston rod 3 contracts, the sleeve disc 15 on the outer side of the upper end of the piston rod 3 descends along with the piston rod, when the sleeve disc 15 descends to the position of the limiting rod 13, the sleeve disc is blocked by the limiting rod 13 and cannot descend again, at the moment, the piston 4 at the lower end of the piston rod 3 reaches the maximum contraction degree, through the limiting matching between the limiting rod 13 and the sleeve disc 15, the piston rod 3 can be prevented from touching the cylinder bottom 1, the cylinder bottom 1 is prevented from being impacted internally, the service life of the device is prolonged, the rubber cushion layer 14 is arranged between the limiting rod 13 and the sleeve disc 15, the sleeve disc 15 can be prevented from impacting the limiting rod 13 to cause noise and damage, and the position of the limiting rod 13 on the surface of the connecting pipe 11 is adjustable, so that the maximum contraction degree of the piston rod 3 can be.

The utility model discloses a theory of operation and use flow: in the utility model, the outer surface of the piston 4 is sleeved with the anti-wear ring 5, the anti-wear ring 5 can prevent the piston 4 from directly attaching to the inner wall of the cylinder barrel 2, when the piston rod 3 and the piston 4 reciprocate up and down, the anti-wear ring 5 can prevent the piston 4 from being worn by the inner wall of the cylinder barrel 2, the hole groove 8 is used for the piston rod 3 to enter and exit the cylinder barrel 2, the dustproof sleeve 9 can prevent external dust from entering the cylinder barrel 2 through a gap generated between the piston rod 3 and the hole groove 8, the sealing sleeve 10 is used for improving the internal sealing performance of the cylinder barrel 2, when the piston rod 3 contracts, the sleeve disc 15 at the outer side of the upper end of the piston rod 3 descends along with the hole groove, when the sleeve disc 15 descends to the position of the limiting rod 13, the piston 4 at the lower end of the piston rod 3 reaches the maximum contraction degree, through the limit fit between the limiting rod, the piston rod 3 can be prevented from touching the cylinder bottom 1, thereby preventing the cylinder bottom 1 from being hit internally.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a hydraulic cylinder with buffer function, includes cylinder bottom (1) and cylinder cap (7), its characterized in that: the cylinder barrel (2) is integrally installed at the upper end of the cylinder bottom (1), the piston rod (3) is installed inside the cylinder barrel (2), the piston (4) is sleeved on the outer side of the tail end of the piston rod (3), the anti-wear ring (5) is sleeved on the outer side of the piston (4), the guide sleeve (6) is arranged on the inner wall of the upper end of the cylinder barrel (2), the cylinder cover (7) is located at the upper end of the cylinder barrel (2), a hole groove (8) is formed in the cylinder cover (7), the dustproof sleeve (9) is installed inside the hole groove (8), a sealing sleeve (10) is arranged below the dustproof sleeve (9), a connecting pipe (11) is welded at the upper end of the cylinder cover (7), a threaded ring (12) is wound on the outer surface of the connecting pipe (11), a limiting rod (13) is screwed on the outer side of the threaded ring (12), and a rubber cushion layer (14, and a sleeve disc (15) is fixedly arranged on the outer side of the upper end of the piston rod (3).

2. A hydraulic ram having a cushioning function as claimed in claim 1, wherein: the vertical center line of cylinder (2) and the vertical center line coincidence of piston rod (3), and piston rod (3) are connected with ring (5) wear-resisting through piston (4).

3. A hydraulic ram having a cushioning function as claimed in claim 1, wherein: the cylinder cover (7) is connected with the dustproof sleeve (9) through the hole groove (8), and the inner surface of the dustproof sleeve (9) is attached to the outer surface of the piston rod (3).

4. A hydraulic ram having a cushioning function as claimed in claim 1, wherein: the inner diameter of the connecting pipe (11) is larger than the outer diameter of the piston rod (3), and the connecting pipe (11) is in threaded connection with the limiting rod (13) through the threaded ring (12).

5. A hydraulic ram having a cushioning function as claimed in claim 1, wherein: the limiting rod (13) is of an internal hollow body structure, and the upper surface of the limiting rod (13) is attached to the lower surface of the rubber cushion layer (14).

6. A hydraulic ram having a cushioning function as claimed in claim 1, wherein: the vertical central line of the sleeve disc (15) and the vertical central line of the limiting rod (13) are positioned on the same horizontal line, and the inner diameter of the sleeve disc (15) is equal to the outer diameter of the piston rod (3).