CN219062130U

CN219062130U - Single-acting piston cylinder without exhaust hole

Info

Publication number: CN219062130U
Application number: CN202223507756.4U
Authority: CN
Inventors: 蒋先江; 毛永; 武斌; 陈松
Original assignee: Zhejiang Ingenuity Hydraulic Technology Co ltd
Current assignee: Zhejiang Ingenuity Hydraulic Technology Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-05-23
Anticipated expiration: 2032-12-28

Abstract

The utility model relates to a part of a forklift, in particular to a single-acting piston cylinder without an exhaust hole, which comprises a cylinder body, a cylinder bottom, a cylinder cover, a piston and a piston rod, wherein a buffer sleeve and a thimble assembly matched with the buffer sleeve are arranged in the piston, a buffer hole communicated with the thimble assembly is formed in the inner side of the front end of the piston rod, the thimble assembly comprises a thimble, a spring and a spring baffle, the thimble props against an inner hole of the piston, the spring is sleeved on the thimble and is blocked by the spring baffle, and the spring baffle is limited by the buffer sleeve. According to the utility model, the thimble assembly is designed in the piston, the buffer hole matched with the thimble assembly is arranged on the inner side of the end part of the piston rod, the exhaust hole is eliminated, the interior of the oil cylinder is isolated from the outside, water and dust are prevented from entering, rust and oil leakage are prevented, the action stability is ensured, the service life is prolonged, and the structure is ingenious and reasonable, the processing is convenient, and the installation is easy.

Description

Single-acting piston cylinder without exhaust hole

Technical Field

The utility model relates to a part of a forklift, in particular to a single-acting piston cylinder without an exhaust hole.

Background

The single-acting piston cylinder is a special power component of a forklift, the conventional single-acting piston cylinder generally needs to be provided with an exhaust hole for exhausting, and in the long-time use process, water and dust are easy to enter from the exhaust hole, so that rust and oil leakage can be caused, on one hand, the action stability of the single-acting piston cylinder is influenced, and on the other hand, the service life of the single-acting piston cylinder is influenced.

Disclosure of Invention

In order to solve the defects and shortcomings in the prior art, the utility model provides the vent-free single-acting piston cylinder which is provided with the ejector pin assembly in the piston, the buffer hole matched with the ejector pin assembly is arranged on the inner side of the end part of the piston rod, the vent hole is eliminated, the interior of the cylinder is isolated from the outside, water and dust are prevented from entering, rust and oil leakage are prevented, the action stability is ensured, the service life is prolonged, and the vent-free single-acting piston cylinder is ingenious and reasonable in structure, convenient to process and easy to install.

The technical scheme of the utility model is as follows: the utility model provides a no exhaust hole single-acting piston cylinder, includes cylinder body, cylinder bottom, cylinder cap, piston and piston rod, the inside of piston is equipped with the thimble subassembly of cushion collar and cooperation cushion collar, the front end inboard of piston rod is equipped with the buffer hole of intercommunication thimble subassembly, the thimble subassembly includes thimble, spring and spring separation blade, the hole of piston is withheld to the thimble, the spring housing is blocked on the thimble and through the spring separation blade, the spring separation blade is spacing through the cushion collar.

According to the utility model, the thimble assembly is designed in the piston, the buffer hole matched with the thimble assembly is arranged on the inner side of the end part of the piston rod, the exhaust hole is eliminated, the interior of the oil cylinder is isolated from the outside, water and dust are prevented from entering, rust and oil leakage are prevented, the action stability is ensured, the service life is prolonged, and the structure is ingenious and reasonable, the processing is convenient, and the installation is easy.

Preferably, the piston and the cylinder body are supported by the support ring and sealed by the first sealing ring, one side of the first sealing ring is provided with the sealing ring baffle, the piston and the piston rod are connected by the first steel wire check ring, and a first O-shaped ring is arranged between the thimble and the piston.

Preferably, one end of the buffer sleeve props against the spring baffle plate, and the other end of the buffer sleeve is limited by the second steel wire retainer ring.

Preferably, a hollow guide column matched with the buffer sleeve is arranged on the cylinder bottom, a transverse oil passing channel is arranged in the hollow guide column, an oil hole is arranged on the cylinder bottom, and the oil hole is communicated with the transverse oil passing channel through the vertical oil passing channel.

Preferably, the cylinder cover and the cylinder body are connected through threads, the cylinder bottom and the cylinder body are welded together, and a dust ring is arranged between the cylinder cover and the piston rod.

Preferably, a second sealing ring is arranged between the cylinder cover and the piston rod, a second O-shaped ring is arranged between the cylinder body and the cylinder cover, and an auxiliary assembly hole is formed in the outer ring of the cylinder cover.

Preferably, a threaded hole is formed in the cylinder body, close to the cylinder cover, and a hexagonal socket head cap screw and a combined pad matched with the hexagonal socket head cap screw are arranged on the threaded hole.

Preferably, the rear end of the piston rod is provided with a first threaded assembly hole, and one end of the cylinder bottom is provided with a second threaded assembly hole.

Drawings

FIG. 1 is a schematic view, partially in section, of the present utility model;

FIG. 2 is an enlarged schematic view of the portion I in FIG. 1;

the cylinder head is characterized by comprising a piston rod 1, a dust ring 2, a first O-ring 4, a cylinder cover 5, a cylinder body 6, a first wire retainer ring 7, a support ring 8, a sealing ring baffle 9, a first sealing ring 10, a buffer sleeve 11, a piston 12, a second O-ring 13, a thimble 14, a spring 15, a spring baffle 16, a combined pad 17, a hexagon socket head cap screw 18, a second sealing ring 19, a second wire retainer ring 20, a cylinder bottom 21, a buffer hole 22, a transverse oil passing channel 23, an oil hole 24, a vertical oil passing channel 25, an auxiliary assembly hole 26, a first threaded assembly hole 27, a second threaded assembly hole 28 and a hollow guide post.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings, without limiting the scope of the utility model.

As shown in figures 1 and 2, the single-acting piston cylinder without the exhaust hole comprises a cylinder body 5, a cylinder bottom 20, a cylinder cover 4, a piston 11 and a piston rod 1, wherein a buffer sleeve 10 and a thimble assembly matched with the buffer sleeve 10 are arranged in the piston 11, a buffer hole 21 communicated with the thimble assembly is formed in the inner side of the front end of the piston rod 1, the thimble assembly comprises a thimble 13, a spring 14 and a spring baffle 15, the thimble 13 props against the inner hole of the piston 11, the spring 14 is sleeved on the thimble 13 and blocked by the spring baffle 15, and the spring baffle 15 is limited by the buffer sleeve 10. The piston 11 and the cylinder body 5 are supported by the support ring 7 and sealed by the first sealing ring 9, a sealing ring baffle 8 is arranged on one side of the first sealing ring 9, the piston 11 and the piston rod 1 are connected by the first steel wire check ring 6, and a first O-shaped ring 3 is arranged between the thimble 13 and the piston 11. One end of the buffer sleeve 10 abuts against the spring baffle 15, and the other end of the buffer sleeve 10 is limited through the second steel wire check ring 19. The cylinder bottom 20 is provided with a hollow guide post 28 matched with the buffer sleeve 10, the inside of the hollow guide post 28 is provided with a transverse oil passing channel 22, the cylinder bottom 20 is provided with an oil hole 23, and the oil hole 23 is communicated with the transverse oil passing channel 22 through a vertical oil passing channel 24. The cylinder cover 4 is connected with the cylinder body 5 through threads, the cylinder bottom 20 is welded with the cylinder body 5, and a dust ring 2 is arranged between the cylinder cover 4 and the piston rod 1. A second sealing ring 18 is arranged between the cylinder cover 4 and the piston rod 1, a second O-shaped ring is arranged between the cylinder body and the cylinder cover, and an auxiliary assembly hole 25 is arranged on the outer ring of the cylinder cover 4. The cylinder body 5 is provided with a threaded hole near the end of the cylinder cover 4, and the threaded hole is provided with an inner hexagonal socket head cap screw 17 and a combined pad 16 matched with the inner hexagonal socket head cap screw 17. The rear end of the piston rod 1 is provided with a first threaded fitting hole 26 and one end of the cylinder bottom 20 is provided with a second threaded fitting hole 27.

The assembly and working principle of the utility model are as follows:

the piston and the cylinder body are supported by the support ring and sealed by the first sealing ring, when the pressure is high, the sealing ring baffle can be added to prevent the first sealing ring from being crushed, the piston and the piston rod are connected by the first steel wire baffle ring, the thimble is provided with the first O-shaped ring, the thimble and the inner hole of the piston are sealed by the first O-shaped ring, the spring baffle plate is provided with a spring between the spring baffle plate and the thimble, the spring baffle plate is blocked by the thimble, the thimble is enabled to have a certain force to press the piston, the buffer sleeve is blocked by the spring baffle plate, and the buffer sleeve is blocked by the second steel wire baffle ring.

The cylinder body and the cylinder bottom are welded together, the cylinder bottom is provided with a protruding shaft (a hollow guide post), and the hollow guide post is in clearance fit with the buffer sleeve to play a role in buffering when the oil cylinder descends to the bottom. The cylinder body is provided with a threaded hole, an inner hexagonal cylindrical head screw and a combined pad are arranged on the cylinder body, a small amount of hydraulic oil is injected into the threaded hole, the combined pad and the screw are assembled on the cylinder body, and the hydraulic oil enables the cylinder barrel in the rod cavity to generate an oil film without rust.

The cylinder cover is provided with the dustproof ring to play a role in dust prevention, the second sealing ring is arranged between the cylinder cover and the piston rod to play a role in sealing, the cylinder cover is in threaded connection with the cylinder body, the second O-shaped ring is arranged between the cylinder cover and the cylinder body to seal, and the cylinder cover is made of ductile iron and has lubrication guiding function.

The front end of the piston rod is provided with a deep hole (buffer hole), the length of the hole is set according to the volume of the rod cavity, when the oil cylinder rises to the top, the air of the rod cavity is completely extruded into the deep hole of the piston rod, and when the oil cylinder leaks in a piston sealing ring of the oil cylinder or the deep hole of the piston rod is shallow, the hydraulic oil in the rod cavity can be discharged to the rodless cavity through a top needle when the oil cylinder rises to the top.

The utility model has ingenious and reasonable structural design and perfectly solves the problem of water inlet rust. When the hydraulic oil leaks too much or the piston rod hole is shallow, the pressure formed by the hydraulic oil in the rod cavity is larger than the opening pressure of the one-way valve (thimble assembly), and the one-way valve is opened at the moment. Excess oil in the rod cavity flows away through the one-way valve.

Claims

1. The utility model provides a no exhaust hole single-acting piston cylinder, includes cylinder body, cylinder bottom, cylinder cap, piston and piston rod, its characterized in that: the inside of piston is equipped with the thimble subassembly of cushion collar and cooperation cushion collar, the front end inboard of piston rod is equipped with the buffer hole of intercommunication thimble subassembly, the thimble subassembly includes thimble, spring and spring separation blade, the hole of piston is withheld to the thimble, the spring housing is on the thimble and is blocked through the spring separation blade, the spring separation blade is spacing through the cushion collar.

2. A single-acting piston cylinder without exhaust holes according to claim 1, characterized in that: the piston is supported by the support ring and is sealed by the first sealing ring, a sealing ring baffle is arranged on one side of the first sealing ring, the piston is connected with the piston rod by the first steel wire check ring, and a first O-shaped ring is arranged between the thimble and the piston.

3. A single-acting piston cylinder without exhaust holes according to claim 1, characterized in that: one end of the buffer sleeve props against the spring baffle plate, and the other end of the buffer sleeve is limited by the second steel wire retainer ring.

4. A single-acting piston cylinder without exhaust holes according to claim 1, characterized in that: the cylinder bottom is provided with a hollow guide column matched with the buffer sleeve, the inside of the hollow guide column is provided with a transverse oil passing channel, the cylinder bottom is provided with an oil hole, and the oil hole is communicated with the transverse oil passing channel through the vertical oil passing channel.

5. A single-acting piston cylinder without exhaust holes according to claim 1, characterized in that: the cylinder cover is connected with the cylinder body through threads, the cylinder bottom is welded with the cylinder body, and a dust ring is arranged between the cylinder cover and the piston rod.

6. A single-acting piston cylinder without exhaust ports as defined in claim 5, wherein: a second sealing ring is arranged between the cylinder cover and the piston rod, a second O-shaped ring is arranged between the cylinder body and the cylinder cover, and an auxiliary assembly hole is formed in the outer ring of the cylinder cover.

7. A single-acting piston cylinder without exhaust holes according to claim 1, characterized in that: the cylinder body is provided with a threaded hole near the cylinder cover end, and the threaded hole is provided with an inner hexagonal socket head cap screw and a combined pad matched with the inner hexagonal socket head cap screw.

8. A single-acting piston cylinder without exhaust holes according to claim 1, characterized in that: the rear end of the piston rod is provided with a first threaded assembly hole, and one end of the cylinder bottom is provided with a second threaded assembly hole.