CN217462732U

CN217462732U - Oil inlet structure of two-stage oil cylinder

Info

Publication number: CN217462732U
Application number: CN202220228985.3U
Authority: CN
Inventors: 赵后显; 顾鹏飞
Original assignee: Suzhou Aobeide Hydraulic Technology Co ltd
Current assignee: Suzhou Aobeide Hydraulic Technology Co ltd
Priority date: 2022-01-27
Filing date: 2022-01-27
Publication date: 2022-09-20
Anticipated expiration: 2032-01-27

Abstract

The utility model discloses a two-stage oil cylinder oil feeding structure, which comprises a first cylinder, a second cylinder and a piston rod, wherein the second cylinder is connected in the first cylinder through a first piston, the piston rod is connected in the second cylinder through a second piston, the top and the bottom of the first cylinder are respectively provided with two oil inlet and outlet ports for facilitating the connection and fixation of oil pipes, a first oil cavity is formed between the first cylinder and the second cylinder, a second oil cavity is formed between the second cylinder and the piston rod, a guide rod is fixed on the first piston, a holding cavity matched with the guide rod is arranged on the piston rod, the guide rod movably penetrates through the second piston and extends into the holding cavity, a third oil cavity is formed between the guide rod and the piston rod, an oil path for communicating the third oil cavity and the first oil cavity is arranged in the guide rod and the first piston, an oil path for communicating the second oil cavity and the third oil cavity is arranged on the piston rod, the first piston is provided with an oil way for communicating the first cylinder barrel and the second cylinder barrel, and the defect of high processing difficulty caused by processing the oil way on the inner wall of the cylinder barrel by the two-stage oil cylinder is overcome.

Description

Oil inlet structure of two-stage oil cylinder

Technical Field

The utility model relates to a hydraulic cylinder technical field, specificly a two-stage hydro-cylinder oil feed structure.

Background

Hydraulic cylinder is a very extensive equipment of range of application, generally regards fluid as working medium, comes the transmission motion through sealed volumetric change, comes transmission power through the inside pressure of fluid, can change the hydraulic energy into mechanical energy, does straight reciprocating motion or swing motion, can be along with the hydro-cylinder piston rod motion of current two-stage hydro-cylinder, and defeated oil pipe's of being not convenient for connection is fixed, and current two-stage hydro-cylinder is many at the inner wall processing oil circuit of cylinder, and the processing degree of difficulty is big, and is with high costs, consequently, the utility model provides a two-stage hydro-cylinder oil feed structure.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect among the prior art, the embodiment of the utility model provides a two-stage hydro-cylinder oil feed structure to solve the problem that proposes among the above-mentioned background art.

The embodiment of the application discloses: a two-stage oil cylinder oil inlet structure comprises a first cylinder barrel, a second cylinder barrel and a piston rod, wherein the second cylinder barrel is connected in the first cylinder barrel through a first piston, the piston rod is connected in the second cylinder barrel through a second piston, a first oil inlet and outlet and a second oil inlet and outlet are respectively arranged at the top and the bottom of the first cylinder barrel, a first oil cavity is formed between the inner wall of the first cylinder barrel and the outer wall of the second cylinder barrel, a second oil cavity is formed by the inner wall of the second cylinder barrel and the outer wall of a piston rod, a guide rod coaxial with the first cylinder barrel is fixed on the first piston, an accommodating cavity matched with the guide rod is arranged on the piston rod, the guide rod movably penetrates through the second piston and extends into the accommodating cavity, a third oil cavity is formed by the outer wall of the guide rod and the inner wall of the piston rod, a first oil way communicated with the third oil cavity along the axial direction of the guide rod is arranged on the guide rod, the first piston is provided with a second oil path communicated with the first oil chamber and the first oil path, the first piston is provided with a third oil path communicated with the first cylinder barrel and the second cylinder barrel, and the piston rod is provided with a fourth oil path communicated with the third oil chamber and the second oil chamber at the position close to the second piston.

Preferably, the length of the guide rod is smaller than the sum of the lengths of the accommodating cavity and the second piston.

Preferably, a trunnion is connected to an end of the piston rod.

Preferably, multiple seals are arranged on the contact surface of the first piston and the first cylinder barrel, and multiple seals are arranged on the contact surfaces of the second piston, the second cylinder barrel and the guide rod.

The utility model has the advantages as follows: when the two-stage oil cylinder needs to be extended, oil is filled from the second oil inlet and outlet, the first oil inlet and outlet pumps oil, oil filling oil pressure enters the first cylinder and enters the second cylinder from the third oil path, the oil pressure in the first cylinder pushes the second cylinder to extend out of the first cylinder through the first piston, the oil pressure in the second cylinder pushes the second piston to drive the piston rod to extend out of the second cylinder, when the piston rod extends out of the second cylinder, the volumes of the third oil chamber, the second oil chamber and the third oil chamber are all reduced, the oil in the second oil chamber is pressed into the third oil chamber from the fourth oil path and then pressed into the first oil chamber along the first oil path and the second oil path, and the oil in the first oil chamber is pumped away from the first oil inlet and outlet; retracting during the two-stage hydro-cylinder, by the oil is pumped to second business turn over hydraulic fluid port, first business turn over hydraulic fluid port refuels, the piston rod with after the second cylinder withdrawal, first oil pocket the second oil pocket with the volume of third oil pocket recovers, by the oil stream that first business turn over hydraulic fluid port added is gone into in the first oil pocket, the warp the second oil circuit with first oil circuit flows in the third oil pocket, the warp again the fourth oil circuit flows in the second oil pocket, first business turn over hydraulic fluid port with second business turn over hydraulic fluid port all sets up on the first cylinder, makes the glib can not follow the motion of oil cylinder piston rod, makes things convenient for oil pipe's connection and fixed, first oil circuit the second oil circuit third oil circuit with the fourth oil circuit all does not set up at the cylinder inner wall, has reduced the processing degree of difficulty.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, 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 diagram of a two-stage oil inlet structure of an oil cylinder.

Reference numbers to the above figures: 1. a first cylinder; 2. a second cylinder; 3. a piston rod; 4. a first oil inlet and outlet; 5. a second oil inlet and outlet; 6. a first oil chamber; 7. a second oil chamber; 8. a first piston; 9. a second piston; 10. a guide bar; 11. an accommodating cavity; 12. a third oil chamber; 13. a first oil passage; 14. a second oil passage; 15. a third oil passage; 16. and a fourth oil passage.

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, a two-stage oil inlet structure of an oil cylinder comprises a first cylinder barrel 1, a second cylinder barrel 2 and a piston rod 3, wherein the second cylinder barrel 2 is connected in the first cylinder barrel 1 through a first piston 8, the piston rod 3 is connected in the second cylinder barrel 2 through a second piston 9, a first oil inlet and outlet 4 and a second oil inlet and outlet 5 are respectively arranged at the top and the bottom of the first cylinder barrel 1, a first oil cavity 6 is formed between the inner wall of the first cylinder barrel 1 and the outer wall of the second cylinder barrel 2, a second oil cavity 7 is formed between the inner wall of the second cylinder barrel 2 and the outer wall of a rod of the piston rod 3, a guide rod 10 coaxial with the first piston 8 is fixed on the first piston 8, an accommodating cavity 11 matched with the guide rod 10 is arranged on the piston rod 3, the guide rod 10 movably penetrates through the second piston 9 and extends into the accommodating cavity 11, and a third oil cavity 12 is formed between the outer wall of the guide rod 10 and the inner wall of the piston rod 3, a first oil path 13 which is arranged along the axial direction of the guide rod 10 and is communicated with the third oil chamber 12 is arranged on the guide rod, a second oil path 14 which is communicated with the first oil chamber 6 and the first oil path 13 is processed on the first piston 8, a third oil path 15 which is communicated with the first cylinder barrel 1 and the second cylinder barrel 2 is processed on the first piston, and a fourth oil path 16 which is communicated with the third oil chamber 12 and the second oil chamber 7 is arranged at the position, close to the second piston 9, of the piston rod 3.

The length of the guide rod 10 is smaller than the sum of the lengths of the accommodating cavity 11 and the second piston 9, so that the guide rod 10 is prevented from abutting against the inner wall of the accommodating cavity 11 to block the first oil path 13 in the retraction state of the two-stage oil cylinder.

The end of the piston rod 3 is connected with a trunnion.

The contact surface of the first piston 8 and the first cylinder barrel 1 is provided with multiple seals, and the contact surfaces of the second piston 9, the second cylinder barrel 2 and the guide rod 10 are provided with multiple seals.

The beneficial effects of the embodiment of the application are as follows: when the two-stage oil cylinder needs to be extended out, oil is filled from the second oil inlet and outlet 5, the first oil inlet and outlet 4 pumps oil, oil filling oil pressure enters the first cylinder barrel 1 and enters the second cylinder barrel 2 from the third oil path 15, the oil pressure in the first cylinder 1 pushes the second cylinder 2 to extend out of the first cylinder 1 through the first piston 8, the oil pressure in the second cylinder 2 pushes the second piston 9 to drive the piston rod 3 to extend out of the second cylinder 2, when the piston rod 3 extends out of the second cylinder 2, the volumes of the third oil chamber 12, the second oil chamber 7 and the third oil chamber 12 are all reduced, the oil in the second oil chamber 7 is pressed into the third oil chamber 12 through the fourth oil path 16, and then is pressed into the first oil chamber 6 along the first oil path 13 and the second oil path 14, and the oil in the first oil chamber 6 is pumped out through the first oil inlet/outlet 4; when the two-stage oil cylinder is retracted, the second oil inlet/outlet 5 pumps oil, the first oil inlet/outlet 4 pumps oil, after the piston rod 3 and the second cylinder 2 are retracted, the volumes of the first oil chamber 6, the second oil chamber 7 and the third oil chamber 12 are restored, the oil fed from the first oil inlet/outlet port 4 flows into the first oil chamber 6, flows into the third oil chamber 12 through the second oil passage 14 and the first oil passage 13, and flows into the second oil chamber 7 through the fourth oil passage 16, the first oil inlet and outlet 4 and the second oil inlet and outlet 5 are both arranged on the first cylinder barrel 1, so that the oil nozzle can not move along with the piston rod 3 of the oil cylinder, the connection and the fixation of the oil pipe are convenient, the first oil path 13, the second oil path 14, the third oil path 15 and the fourth oil path 16 are not arranged on the inner wall of the cylinder barrel, so that the processing difficulty is reduced.

The present invention has been explained by using specific embodiments, and the explanation of the above embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. The utility model provides a two-stage hydro-cylinder oil feed structure which characterized in that: the oil cylinder comprises a first cylinder barrel, a second cylinder barrel and a piston rod, wherein the second cylinder barrel is connected in the first cylinder barrel through a first piston, the piston rod is connected in the second cylinder barrel through a second piston, a first oil inlet and a second oil outlet are respectively arranged at the top and the bottom of the first cylinder barrel, a first oil cavity is formed between the inner wall of the first cylinder barrel and the outer wall of the second cylinder barrel, a second oil cavity is formed between the inner wall of the second cylinder barrel and the outer wall of the piston rod, a guide rod coaxial with the first piston is fixed on the first piston, an accommodating cavity matched with the guide rod is arranged on the piston rod, the guide rod movably penetrates through the second piston and extends into the accommodating cavity, a third oil cavity is formed between the outer wall of the guide rod and the inner wall of the piston rod, and a first oil way communicated with the third oil cavity along the axial direction of the guide rod is arranged on the guide rod, the first piston is provided with a second oil path communicated with the first oil chamber and the first oil path, the first piston is provided with a third oil path communicated with the first cylinder and the second cylinder, and a fourth oil path communicated with the third oil chamber and the second oil chamber is arranged at the position, close to the second piston, of the piston rod.

2. The two-stage oil cylinder oil inlet structure according to claim 1, characterized in that: the length of the guide rod is smaller than the sum of the lengths of the accommodating cavity and the second piston.

3. The two-stage oil cylinder oil inlet structure according to claim 1, characterized in that: the end of the piston rod is connected with a trunnion.

4. The two-stage oil cylinder oil inlet structure according to claim 1, characterized in that: the contact surface of the first piston and the first cylinder barrel is provided with multiple seals, and the contact surface of the second piston, the second cylinder barrel and the guide rod is provided with multiple seals.