CN218235672U

CN218235672U - Supporting oil cylinder

Info

Publication number: CN218235672U
Application number: CN202221448620.8U
Authority: CN
Inventors: 吴玲; 吴金成; 武锦平
Original assignee: Jiangsu Lixueda Hydraulic Co ltd
Current assignee: Jiangsu Lixueda Hydraulic Co ltd
Priority date: 2022-06-10
Filing date: 2022-06-10
Publication date: 2023-01-06
Anticipated expiration: 2032-06-10

Abstract

The utility model relates to a supporting oil cylinder, which is provided with a cylinder barrel, a cylinder rear cover, a cylinder front cover and a stroke component; a front oil port communicated with the inner cavity of the cylinder barrel is arranged on the wall of the cylinder barrel; the cylinder rear cover is connected with the rear end of the cylinder barrel, and the cylinder front cover is connected with the front end of the cylinder barrel; a rear oil port is formed in the cylinder rear cover; the stroke assembly and the cylinder barrel are coaxially arranged, one end of the stroke assembly is arranged in the cylinder barrel, and the other end of the stroke assembly is arranged outside the cylinder barrel; the stroke assembly comprises a piston, a piston rod and a connector; the piston is detachably arranged at the rear end of the piston rod; the connector is detachably arranged at the front end of the piston rod; a piston sealing assembly is additionally arranged on the piston; and a piston rod sealing assembly is additionally arranged on the cylinder front cover. The utility model aims at overcoming the defects existing in the prior art and providing a supporting oil cylinder.

Description

Supporting oil cylinder

Technical Field

The utility model relates to a hydro-cylinder field especially relates to a supporting hydro-cylinder.

Background

The support cylinder is one of a number of hydraulic actuators. The existing supporting oil cylinder often has the problem that the sealing performance of a piston or a piston rod is poor after the existing supporting oil cylinder operates for a period of time, and the poor sealing performance is usually caused by an unreasonable sealing structure. Therefore, a supporting oil cylinder with a better sealing structure of the piston and the piston rod is needed.

Disclosure of Invention

The utility model aims at overcoming the defects existing in the prior art and providing a supporting oil cylinder.

Realize the utility model discloses the technical scheme of purpose is: a support cylinder has a cylinder barrel, a cylinder rear cover, a cylinder front cover, and a stroke assembly; a front oil port communicated with the inner cavity of the cylinder barrel is arranged on the wall of the cylinder barrel; the cylinder rear cover is connected with the rear end of the cylinder barrel, and the cylinder front cover is connected with the front end of the cylinder barrel; a rear oil port is formed in the cylinder rear cover; the stroke assembly and the cylinder barrel are coaxially arranged, one end of the stroke assembly is arranged in the cylinder barrel, and the other end of the stroke assembly is arranged outside the cylinder barrel; the stroke assembly comprises a piston, a piston rod and a connector; the piston is detachably arranged at the rear end of the piston rod, and the piston is connected with the piston rod in a laterally locked manner through a bolt; the connector is detachably mounted at the front end of the piston rod, and the assembly and disassembly between the connector and the piston rod are specifically referred to the prior stage and are not described herein; a piston sealing assembly is additionally arranged on the piston; and a piston rod sealing assembly is additionally arranged on the cylinder front cover. The piston seal assembly and the piston rod seal assembly together form a complex sealing system that ensures maximum production efficiency and energy production of the support cylinder.

Further, the piston seal assembly includes a piston seal and a wear ring; the piston seal is disposed in a peripheral mid-section of the piston; the wear rings are disposed on the piston on either side of the piston seal. The piston sealing element is a key part in the supporting cylinder, the arrangement of the piston sealing element can prevent hydraulic oil in the supporting cylinder from flowing through the piston, so that the pressure difference of the extension and contraction of the supporting cylinder is ensured, and the wear-resisting ring can prevent metal from contacting with each other and absorb transverse load.

Furthermore, the contact side of the piston sealing element and the inner cavity of the cylinder barrel is provided with a V shape, and the contact side is arc-shaped.

Further, the piston rod sealing assembly comprises a dust seal, a first seal, a second seal, a first piston rod seal, a second piston rod seal, a first O-ring and a second O-ring; the dustproof sealing piece is arranged on the inner side of the front end of the cylinder front cover, is placed in an accommodating groove formed in the inner side of the front end of the cylinder front cover and is in contact with the piston rod; the second piston rod sealing element, the first piston rod sealing element and the second sealing element are sequentially arranged from the inner side of the rear end of the cylinder front cover to the inner side of the front end of the cylinder front cover; the cylinder protecgulum inboard that every sealing member was arranged all corresponds and offers the holding tank that is used for placing the sealing member. The first piston rod seal and the second piston rod seal ensure adequate lubrication of the piston rod.

Further, the dust seal comprises a dust seal body and a dust tongue edge formed by extending the dust seal body to the front end; dustproof tongue limit is provided with the arc district with the interlude of piston rod laminating department, and dust sealing's effect can block dust, outside particulate matter and moisture outside the system effectively to play better dustproof sealing effect.

Further, the first sealing element comprises a first sealing body and a first rib formed by extending the first sealing body to the piston rod, namely the first sealing body and the first rib are integrally formed; a trapezoidal groove is formed at the joint of the rear end of the first sealing body and the rear end of the first flange; the front end of the first sealing body is connected with the front end of the first rib at a right angle.

Further, the second sealing element is a V-shaped sealing ring; the opening of the V-shaped sealing ring is placed backwards. The first seal and the second seal can prevent hydraulic oil from leaking out of the cylinder.

After the technical scheme is adopted, the utility model discloses following positive effect has: the utility model discloses piston seal assembly and piston rod seal assembly form complicated and the good sealing system of leakproofness together, ensure that the production efficiency and the energy output of supporting cylinder reach the at utmost.

Drawings

In order that the manner in which the above recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to embodiments, some of which are illustrated in the appended drawings

Fig. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of the stroke assembly of the present invention;

FIG. 3 is an enlarged view of a portion A of the present invention;

fig. 4 is a schematic structural view of a first sealing member of the present invention;

fig. 5 is a schematic structural view of the dust seal of the present invention.

The reference numbers in the figures are: the hydraulic cylinder comprises a cylinder barrel 10, a cylinder rear cover 20, a cylinder front cover 30, a stroke assembly 40, a piston 41, a piston rod 42, a connector 43, a front oil port 50, a rear oil port 60, a piston sealing assembly 70, a plug sealing member 71, a wear-resistant ring 72, a piston rod sealing assembly 80, a dust sealing member 81, a dust sealing main body 811, a dust-proof tongue 812, an arc-shaped area 813, a first sealing member 82, a first sealing body 821, a first blocking edge 822, a trapezoidal groove 823, a right angle 824, a second sealing member 83, a first piston rod sealing member 84, a second piston rod sealing member 85, a first O-shaped ring 86 and a second O-shaped ring 87.

Detailed Description

Referring to fig. 1 to 3, the present invention has a cylinder tube 10, a cylinder rear cover 20, a cylinder front cover 30, and a stroke assembly 40; the cylinder wall of the cylinder barrel 10 is provided with a front oil port 50 communicated with the inner cavity of the cylinder barrel 10; the cylinder rear cover 20 is connected with the rear end of the cylinder barrel 10, and the cylinder front cover 30 is connected with the front end of the cylinder barrel 10; the cylinder rear cover 20 is provided with a rear oil port 60; the stroke assembly 40 and the cylinder barrel 10 are coaxially arranged, one end of the stroke assembly 40 is arranged in the cylinder barrel 10, and the other end of the stroke assembly 40 is arranged outside the cylinder barrel 10; the stroke assembly 40 comprises a piston 41, a piston rod 42 and a connecting head 43; the piston 41 is detachably arranged at the rear end of the piston rod 42, and the piston 41 and the piston rod 42 are connected through lateral locking of a bolt; the connector 43 is detachably mounted at the front end of the piston rod 42, and the assembly and disassembly between the connector 43 and the piston rod 42 specifically refer to the existing stage, which is not described herein; a piston sealing assembly 70 is additionally arranged on the piston 41; a piston rod seal assembly 80 is attached to the cylinder head 30. The piston seal assembly 70 and the piston rod seal assembly 80 together form a complex sealing system that ensures production efficiency and energy production of the support cylinder to the maximum extent.

Referring to fig. 2, in this embodiment, more specifically, the piston seal assembly 70 includes a piston seal 71 and a wear ring 72; the piston seal 71 is disposed in the outer peripheral middle section of the piston 41; wear rings 72 are disposed on the piston 41 on either side of the piston seal 71. In which a piston seal 71 is a key component in the support cylinder and is positioned to prevent hydraulic oil in the support cylinder from flowing past the piston 41, thereby ensuring a pressure differential for the support cylinder to expand and contract, and a wear ring 72 prevents metal-to-metal contact and absorbs lateral loads.

More specifically, in the present embodiment, the contact side of the piston seal 71 with the inner cavity of the cylinder 10 is provided with a V shape and the contact side is arc-shaped.

Referring to fig. 3, in this embodiment and more particularly, the piston rod seal assembly 80 includes a dust seal 81, a first seal 82, a second seal 83, a first piston rod seal 84, a second piston rod seal 85, a first O-ring 86, and a second O-ring 87; the dust seal 81 is arranged inside the front end of the cylinder front cover 30, and the dust seal 81 is placed in a receiving groove formed inside the front end of the cylinder front cover 30 and is in contact with the piston rod 42; the second piston rod seal 85, the first seal 82, the first piston rod seal 84, and the second seal 83 are arranged in this order along the rear end inside to the front end inside of the cylinder front cover 30; the inner side of the cylinder front cover 30 of each sealing element arrangement is correspondingly provided with a containing groove for placing the sealing element. The first and second

piston rod seals

84, 85 ensure sufficient lubrication of the piston rod 42.

Referring to fig. 3 and 5, in the present embodiment, more specifically, the dust seal 81 includes a dust seal body 811 and a dust-proof tongue 812 formed by extending the dust seal body 811 to the front end; the middle section of the joint of the dustproof tongue edge 812 and the piston rod 42 is provided with an arc-shaped area 813, and the dustproof sealing element 81 is used for effectively blocking dust, external particles and moisture outside the system, so that a better dustproof sealing effect is achieved.

Referring to fig. 3 and 4, in this embodiment, more specifically, first seal 82 includes a first seal body 821 and a first rib 822 formed by extending first seal body 821 toward piston rod 42, that is, first seal body 821 and first rib 822 are integrally formed; a trapezoidal groove 823 is formed at the joint of the rear end of the first sealing body 821 and the rear end of the first rib 822; the junction of the front end of the first seal body 821 and the front end of the first rib 822 is a right angle 824.

Referring to fig. 3, the second seal 83 in this embodiment is more specifically a V-ring seal; the opening of the V-shaped sealing ring is placed backwards. The first and

second seals

82 and 83 prevent hydraulic oil from leaking out of the cylinder.

The utility model discloses a theory of operation does: the reciprocating motion back and forth of piston rod 42 is realized through the cooperation that preceding hydraulic fluid port 50 and back hydraulic fluid port 60 advance oil, and when the piston rod 42 moved to the front end, a small amount of hydraulic oil can permeate forward under the effect of piston rod 42, and the dovetail groove of first sealing member 82 can provide certain buffer, further reduces the hydraulic oil to the front end infiltration, and second sealing member 83 carries out the secondary seal afterwards, and the effect of V-arrangement groove can effectively prevent hydraulic oil from leaking to reach better sealed effect. Regardless of whether the piston rod 42 moves forward or backward, the front end of the dust-proof tongue 812 abuts against the piston rod 42, thereby achieving a good dust-proof effect.

The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only examples of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A support cylinder has a cylinder barrel (10), a cylinder rear cover (20), a cylinder front cover (30), and a stroke assembly (40); a front oil port (50) communicated with an inner cavity of the cylinder barrel (10) is arranged on the wall of the cylinder barrel (10); the cylinder rear cover (20) is connected with the rear end of the cylinder barrel (10), and the cylinder front cover (30) is connected with the front end of the cylinder barrel (10); a rear oil port (60) is formed in the cylinder rear cover (20); the stroke assembly (40) and the cylinder barrel (10) are coaxially arranged, one end of the stroke assembly (40) is arranged in the cylinder barrel (10), and the other end of the stroke assembly is arranged outside the cylinder barrel (10); the method is characterized in that: the stroke assembly (40) comprises a piston (41), a piston rod (42) and a connecting head (43); the piston (41) is detachably arranged at the rear end of the piston rod (42); the connector (43) is detachably arranged at the front end of the piston rod (42); a piston sealing assembly (70) is additionally arranged on the piston (41); and a piston rod sealing assembly (80) is additionally arranged on the cylinder front cover (30).

2. A support ram as claimed in claim 1, wherein: the piston seal assembly (70) includes a piston seal (71) and a wear ring (72); the piston seal (71) is arranged in the middle section of the outer periphery of the piston (41); the wear-resistant rings (72) are arranged on the piston (41) on both sides of the piston seal (71).

3. A support ram as claimed in claim 2, wherein: the contact side of the piston sealing piece (71) and the inner cavity of the cylinder barrel (10) is provided with a V shape and the contact side is arc-shaped.

4. A support ram according to claim 1, 2 or 3, wherein: the piston rod sealing assembly (80) comprises a dust seal (81), a first seal (82), a second seal (83), a first piston rod seal (84), a second piston rod seal (85), a first O-ring (86) and a second O-ring (87); the dust seal (81) is arranged inside the front end of the cylinder front cover (30); the second piston rod seal (85), the first seal (82), the first piston rod seal (84), and the second seal (83) are arranged in this order along the rear end inside to the front end inside of the cylinder front cover (30).

5. A support ram according to claim 4, wherein: the dust seal (81) comprises a dust seal body (811) and a dust tongue edge (812) formed by extending the dust seal body (811) to the front end; an arc-shaped area (813) is arranged in the middle section of the joint of the dustproof tongue edge (812) and the piston rod (42).

6. A support ram as claimed in claim 4, wherein: the first sealing element (82) comprises a first sealing body (821) and a first rib (822) formed by extending the first sealing body (821) to the position of the piston rod (42); a trapezoidal groove (823) is formed at the joint of the rear end of the first sealing body (821) and the rear end of the first rib (822); the joint of the front end of the first sealing body (821) and the front end of the first rib (822) is a right angle (824).

7. A support ram according to claim 4, wherein: the second sealing element (83) is a V-shaped sealing ring; the opening of the V-shaped sealing ring is placed backwards.