CN218030888U

CN218030888U - Support hydraulic cylinder

Info

Publication number: CN218030888U
Application number: CN202222104616.6U
Authority: CN
Inventors: 刘浩亮; 邹玉蓉; 耿少航; 王子健; 白树林; 魏东; 郑高峰; 习文涛
Original assignee: Xian Electronic Engineering Research Institute
Current assignee: Xian Electronic Engineering Research Institute
Priority date: 2022-08-10
Filing date: 2022-08-10
Publication date: 2022-12-13
Anticipated expiration: 2032-08-10

Abstract

The invention relates to a supporting hydraulic cylinder, which is characterized in that an upper sliding bearing, a lower sliding bearing and an outer shell are added on a cylinder barrel by changing the structure of a common hydraulic cylinder, and the outer shell is rigidly connected with a piston rod by threads, so that the rigidity of the hydraulic cylinder is enhanced, and the deformation of structural parts is reduced. Meanwhile, the upper sliding bearing and the lower sliding bearing are used as main supporting pieces, so that the contact gap of the metal structural piece at the sealing ring is enlarged, the metal structural piece is not contacted even if the eccentric load is deformed, the surface quality of the contact surface of the sealing piece is ensured, and the risk that the sealing ring is abraded is reduced.

Description

Support hydraulic cylinder

Technical Field

The invention belongs to the field of mechanical transmission and hydraulic transmission, and relates to a design of a supporting hydraulic cylinder.

Background

Vehicles and work platforms often require hydraulic cylinders for support and leveling due to the need for work. Due to vehicle deformation and uneven ground, the hydraulic cylinder is fixedly mounted and can deform greatly along with the vehicle. Therefore, the hydraulic cylinder is subjected to a radial force along the direction of the piston rod and a lateral force vertical to the direction of the piston rod, and the installation of the hydraulic cylinder is shown in a schematic view in fig. 1. The conventional hydraulic cylinder mainly bears radial load and cannot bear lateral load, and the lateral load often causes abrasion and roughness of a contacted sliding pair, so that a sealing element is abraded, a piston rod is pulled, and the hydraulic cylinder leaks, so that the conventional hydraulic cylinder needs to be optimized.

At present, the study related to the hydraulic cylinder is rare, and a vertical oil cylinder CN202811645U mainly introduces a composition structure of a vertical support hydraulic cylinder. "a hydraulic cylinder for supporting" CN106979187B, describes a vertical support hydraulic cylinder, which can ensure the side force not to damage the sealing member by changing the contact material and controlling the cooperation.

Disclosure of Invention

Technical problem to be solved

In order to avoid the defects of the prior art, the invention provides a novel supporting hydraulic cylinder, which ensures that the sealing element is not damaged by the lateral force by changing the structure of the hydraulic cylinder.

Technical scheme

A supporting hydraulic cylinder comprises a tray, a front cylinder cover, a shaft head, a piston rod, a cylinder barrel, an oil port A, an oil port B, a rear cylinder cover and a central tube, and is characterized in that an outer shell is additionally arranged on the outer side of the cylinder barrel, and the outer shell is rigidly connected with the upper end of the piston rod through threads; the inner side of the cylinder barrel slides with the piston rod, and the outer side slides with the outer shell; a sliding bearing is installed between the outer shell and the cylinder barrel, and the outer shell and the cylinder barrel can slide back and forth through the upper sliding bearing and the lower sliding bearing.

The shell body on be close to the bottom and be equipped with two circular bosss, the interval of two bosss is the installation distance of platform.

The upper sliding bearing is fixedly connected to the cylinder barrel, and the lower sliding bearing is fixedly connected to the outer shell.

And a sealing ring is arranged between the piston and the cylinder barrel.

And a sealing ring is arranged between the rear end cover and the piston rod.

Advantageous effects

According to the support hydraulic cylinder provided by the invention, the structure of a common hydraulic cylinder is changed, the upper sliding bearing, the lower sliding bearing and the outer shell are additionally arranged on the cylinder barrel, and the outer shell is rigidly connected with the piston rod through the threads, so that the rigidity of the hydraulic cylinder is enhanced, and the deformation of structural parts is reduced. Let simultaneously slide bearing, lower slide bearing be main support piece on to enlarge the contact gap of sealing washer department metal structure, even the unbalance loading warp does not let the contact of here metal structure spare, thereby guarantee the surface quality of sealing member contact surface, reduce the risk that the sealing washer was worn and torn.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, wherein like reference numerals are used to designate like parts throughout.

FIG. 1 is a schematic view of the present hydraulic cylinder support platform.

Fig. 2 is a drawing view of the hydraulic cylinder.

FIG. 3 is an extension view of the present cylinder.

1-tray, 2-front cylinder cover and shaft head, 3-sealing ring, 4-piston, 5-piston rod, 6-cylinder barrel, 7-oil port A, 8-oil port B, 9-rear cylinder cover, 10-upper sliding bearing, 11-central tube, 12-outer shell, 13-mounting surface, 14-lower sliding bearing, 15-platform, 16-rod cavity and 17-rodless cavity.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The invention provides a reliable support hydraulic cylinder. The hydraulic cylinder can support a vehicle and a platform and comprises a tray 1, a front cylinder cover, a shaft head 2, a sealing ring 3, a piston 4, a piston rod 5, a cylinder barrel 6, an oil port A7, an oil port B8, a rear cylinder cover 9, an upper sliding bearing 10, a central tube 11, an outer shell 12 and a lower sliding bearing 14. Tray 1 passes through the screw installation subaerial, and preceding cylinder cap and spindle nose 2 link firmly on tray 1, and center tube 11 is located 6 centers on the cylinder, and the center tube 11 outside is piston rod 5, is equipped with piston 4 between piston rod 5 and cylinder 6, and hydraulic fluid port A7, hydraulic fluid port B8 are all laid on piston rod 5 in business turn, constitute the pole chamber and the rodless chamber that have of pneumatic cylinder through 5 inner structure of piston rod and center tube 11. The rear cylinder cover 9 is positioned at the upper end of the piston rod 5. A sealing ring 3 is arranged between the piston 4 and the piston rod 5, and a sealing ring 3 is arranged between the piston 4 and the cylinder barrel 6.

The piston 4 is connected with the piston rod 5 through the upper retainer ring, and the middle of the piston is provided with a seal for preventing leakage. The one end of cylinder 6 is equipped with preceding cylinder cap and spindle nose 2, and the other end is equipped with back cylinder cap 9, all is through threaded connection, all is equipped with the sealing washer moreover and prevents revealing. The piston 4 can slide on the inner surface of the cylinder 6. The piston rod 5 is connected to the outer housing 12 by a tail thread. The slide bearing 10 is fixedly connected to the cylinder tube 6, and the slide bearing 14 is fixedly connected to the outer housing 12. The cylinder tube 6 slides inside the outer housing 12 by means of the support of the slide bearing 10 and the slide bearing 14.

A central pipe 11 is arranged inside the piston rod 5 and connected with a rodless cavity of the hydraulic cylinder, and an oil port A8 is arranged in the center and is an oil inlet and outlet of the rodless cavity. Meanwhile, the end face of the piston rod 5 is also provided with an oil port B7 which is communicated with a rod cavity of the hydraulic cylinder through an internal structure and is an oil inlet and outlet of the rod cavity.

A specific embodiment of the present hydraulic cylinder will be described in detail with reference to fig. 1, 2, and 3.

The hydraulic cylinder is fixed on a vehicle and a platform 14 through a mounting surface 13 on an outer shell 12, wherein the mounting surface is that two circular bosses are arranged on the outer shell 12 close to the bottom, and the distance between the two bosses is the mounting distance of the platform; pressure oil is added to an oil port A7 of the hydraulic cylinder, the front cylinder cover, the shaft head 2, the tray 1 and the cylinder barrel 6 move downwards together until the tray 1 touches the ground, the movement is continued, the height of a platform at a corresponding position is changed, and the extension length of piston rods of all supporting hydraulic cylinders of the platform is adjusted to level the vehicle and the platform. And similarly, pressure oil is applied to an oil port B8 of the hydraulic cylinder, and the front cylinder cover, the shaft head 2, the tray 1 and the cylinder barrel 6 move upwards until the front cylinder cover, the shaft head 2, the tray 1 and the cylinder barrel 6 are completely retracted.

The biggest difficulty of the supporting hydraulic cylinder is that the supporting hydraulic cylinder needs to bear larger lateral force, and the common hydraulic cylinder cannot bear the lateral force, so that the sliding pair and the sealing ring are seriously abraded after long-time operation under the action of the lateral force. The support hydraulic cylinder is innovative in that the rigidity of the hydraulic cylinder is enhanced by changing the structure of a common hydraulic cylinder, so that the deformation of a structural part is reduced. Meanwhile, the contact gap of the structural part at the sealing ring is enlarged, so that the structural part is not contacted, the surface quality of the contact surface of the sealing element is ensured, and the risk of abrasion of the sealing ring is reduced. The specific design is as follows:

1) An upper sliding bearing 10, a lower sliding bearing 14 and an outer shell 12 are added on the cylinder barrel 6, and the outer shell 12 and the piston rod 5 are rigidly connected by threads. When the hydraulic cylinder moves, the outer shell 12 and the cylinder tube 6 can slide back and forth through the upper slide bearing 10 and the lower slide bearing 14.

2) The outer housing 12 is fixed by the mounting surface 13, and the cylinder 6 extends and retracts back and forth when the hydraulic cylinder moves.

3) The cylinder 6 slides inside the piston rod 5 and outside the outer housing 12. So that the minimum support diameter of the hydraulic cylinder is changed from the piston rod 5 to the cylinder barrel 6, the support diameter of the hydraulic cylinder is increased, and the support rigidity is increased.

4) By the fit clearance control, the upper slide bearing 10 and the lower slide bearing 14 between the outer housing 12 and the cylinder tube 6 are set as positions to mainly receive the lateral force. Through calculating the deformation of cylinder 6 under the yawing force, set up the sliding clearance between piston 4 and the cylinder 6 and be greater than the deformation of cylinder 6, do not let piston 4 and cylinder 6 contact to guarantee the surface quality of sealing member contact surface, reduce the risk that the sealing washer is worn and torn. The sliding clearance between the rear end cover 9 and the piston rod 5 is set to be larger than the deformation of the cylinder barrel 6, so that the rear end cover 9 is not contacted with the piston rod 5, the surface quality of the contact surface of a sealing element is ensured, and the risk that a sealing ring is abraded is reduced.

5) Due to the addition of the outer shell 12, the hydraulic cylinder is mounted by fixing the outer shell 12 through the mounting surface 13. The hydraulic oil inlet and outlet ports A, B are all distributed on the piston rod 5 and are communicated with a rod cavity and a rodless cavity of the hydraulic cylinder through the internal structure of the piston rod 5 and the central pipe 11.

6) The supporting hydraulic cylinder is characterized in that the cylinder barrel 6 supports the ground, and therefore the tail end of the cylinder barrel 6 is provided with the front cylinder cover, the shaft head 2 and the tray 1, and the hydraulic cylinder is adaptive to unevenness of the bottom surface.

The supporting hydraulic cylinder is applied to supporting vehicles and platforms, and the application shows that: the device satisfies the operation requirement, and is rational in infrastructure, can popularize and apply to product fields such as other war industry and civilian, has fine popularization and application prospect.

While the invention has been described with reference to specific embodiments, the invention is not limited thereto, and various equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present disclosure.

Claims

1. A supporting hydraulic cylinder comprises a tray (1), a front cylinder cover, a shaft head (2), a piston (4), a piston rod (5), a cylinder barrel (6), an oil port A (7), an oil port B (8), a rear cylinder cover (9) and a central tube (11), and is characterized in that an outer shell (12) is additionally arranged on the outer side of the cylinder barrel (6), and the outer shell (12) is rigidly connected with the upper end of the piston rod (5) through threads; the inner side of the cylinder barrel (6) slides with the piston rod (5) and the outer side slides with the outer shell (12); a sliding bearing (10) is arranged between the outer shell (12) and the cylinder barrel (6), and the outer shell (12) and the cylinder barrel (6) can slide back and forth through the upper sliding bearing (10) and the lower sliding bearing (14).

2. A supporting cylinder as claimed in claim 1, wherein: the outer shell (12) is provided with two circular bosses close to the bottom, and the distance between the two bosses is the installation distance of the platform.

3. A supporting cylinder as claimed in claim 1, wherein: the upper sliding bearing (10) is fixedly connected to the cylinder barrel (6), and the lower sliding bearing (14) is fixedly connected to the outer shell (12).

4. A supporting cylinder as claimed in claim 1, characterized in that: a sealing ring is arranged between the piston (4) and the cylinder barrel (6).

5. A supporting cylinder as claimed in claim 1, characterized in that: a sealing ring is arranged between the rear cylinder cover (9) and the piston rod (5).