CN219529456U

CN219529456U - Single-acting oil cylinder and hydraulic equipment

Info

Publication number: CN219529456U
Application number: CN202320770231.5U
Authority: CN
Inventors: 胡国享; 周依晶; 张兴龙; 冯建军; 张广涛; 叶菁; 师俊红
Original assignee: Jiangsu Hengli Hydraulic Co Ltd
Current assignee: Jiangsu Hengli Hydraulic Co Ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-08-15
Anticipated expiration: 2033-04-07

Abstract

The utility model discloses a single-acting oil cylinder and hydraulic equipment, which comprises: the two ends of the cylinder barrel are communicated with each other, and an end cover is arranged at one end of the cylinder barrel to form an oil cavity; the piston assembly comprises a piston, a piston rod and a rod head, one end of the piston is connected with one end of the piston rod, and the other end of the piston rod is connected with the rod head; and the sealing assembly is sleeved on the piston to seal between the outer wall of the piston and the inner wall of the cylinder barrel. When the sealing component is replaced, the damaged sealing component can be replaced only by completely extending the piston component out of the cylinder barrel, so that the replacement step of the sealing component is simplified, the replacement efficiency of the sealing component is improved, and meanwhile, a large operation space is not required in the replacement process of the sealing component; only be provided with the end cover at the one end of cylinder, set up the other end of cylinder into open form, highly fit the seal assembly of frequent change, very big improvement seal assembly's change efficiency.

Description

Single-acting oil cylinder and hydraulic equipment

Technical Field

The utility model relates to the technical field of hydraulic cylinders, in particular to a single-acting oil cylinder and hydraulic equipment.

Background

The single-acting oil cylinder is one kind of hydraulic oil cylinder, and can only supply pressure oil to one side of the piston to output one-way acting force, and the opposite movement is completed according to the action of load external force, spring force, dead weight of plunger rod or piston rod, etc. its advantages are saving hydraulic power and simplifying oil path. Currently, single-acting cylinders are installed on some devices to realize related action functions. The single-acting oil cylinder has an ultra-long stroke and is very high in use frequency, so that after a period of use, the sealing rings in the single-acting oil cylinder are seriously worn, and the sealing rings need to be replaced regularly to ensure the normal operation of equipment.

However, the sealing ring of the existing single-acting oil cylinder is arranged on the guide sleeve, and the piston rod is arranged inside the guide sleeve, namely the sealing ring is positioned between the piston rod and the guide sleeve. When the sealing ring is replaced, the piston rod is required to extend out of the guide sleeve completely, the piston is removed, and the sealing ring can be replaced after the guide sleeve is withdrawn from the piston end. This approach has the following disadvantages:

1. the process of replacing the sealing ring is complicated, and the disassembly and assembly process is troublesome, so that the replacement efficiency is low;

2. this approach requires a large operating space for replacement of the seal ring.

Disclosure of Invention

The utility model aims to solve the technical problems that: in order to solve the technical problem that the existing single-acting oil cylinder is complicated in the process of replacing the sealing ring, the utility model provides the single-acting oil cylinder and the hydraulic equipment, and the sealing assembly is arranged on the piston, so that the operation process of replacing the sealing ring is greatly simplified, and time and labor are saved.

The technical scheme adopted for solving the technical problems is as follows: a single-acting ram comprising: the cylinder barrel is communicated with each other at two ends, and an end cover is arranged at one end of the cylinder barrel to form an oil cavity; the piston assembly comprises a piston, a piston rod and a rod head, one end of the piston is connected with one end of the piston rod, the other end of the piston rod is connected with the rod head, the piston is positioned in the cylinder barrel, and the rod head is positioned outside the cylinder barrel; and the sealing assembly is sleeved on the piston to seal between the outer wall of the piston and the inner wall of the cylinder barrel.

Therefore, when the sealing component is replaced, the damaged sealing component can be replaced only by completely extending the piston component out of the cylinder barrel, so that the replacement step of the sealing component is simplified, the replacement efficiency of the sealing component is improved, and meanwhile, a large operation space is not required in the replacement process of the sealing component; only be provided with the end cover at the one end of cylinder, set up the other end of cylinder into open form, highly fit the seal assembly of frequent change, very big improvement seal assembly's change efficiency.

Further, the club head is provided with an oil channel, the end face of the club head is provided with an oil port, and one end of the oil channel is communicated with the oil port.

Further, a guide copper sleeve is sleeved on the outer wall of the piston. The guide copper sleeve is used for guiding the piston assembly.

Further, the sealing assembly comprises a V-shaped sealing ring set, a U-shaped ring and a retainer ring, wherein the V-shaped sealing ring set, the U-shaped ring and the retainer ring are sleeved on the piston, the V-shaped sealing ring set is positioned on one side of the guide copper sleeve, and the U-shaped ring and the retainer ring are positioned on the other side of the guide copper sleeve. Therefore, the V-shaped sealing ring group, the U-shaped ring and the check ring can effectively seal high-pressure oil in the fourth oil cavity; the V-shaped sealing ring group, the U-shaped ring, the check ring and the guide copper sleeve are all arranged on the piston but not on the piston rod, grinding processing and electroplating rust prevention are not needed on the piston rod, and the cost is greatly saved.

Further, a gland is arranged at the other end of the piston.

Further, a first groove for installing the U-shaped ring and the check ring is formed in the outer wall of the piston.

Further, the piston is a hollow piston, the piston rod is a hollow piston rod, and the oil path channel is communicated with the oil cavity through the interior of the piston and the piston rod.

Further, a second groove is formed in the outer wall of the piston and located at one end, far away from the V-shaped sealing ring set, of the first groove, and a dust ring is arranged in the second groove. Therefore, dust and particles attached to the inner wall of the cylinder barrel can be scraped by the dust ring, the cylinder barrel is ensured to be clean, the damage to the oil caused by the fact that the dust and the particles are immersed into the oil is avoided, and then the oil pump is burnt, so that the safe operation of equipment is affected.

Further, a guide rod is arranged on the outer side of the cylinder barrel, and the guide rod is connected with the cylinder barrel. The guide rod is used for guiding the cylinder barrel.

The utility model also provides hydraulic equipment comprising the single-acting oil cylinder.

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

1. according to the utility model, the sealing component is arranged on the piston, and when the sealing component is replaced, the damaged sealing component can be replaced only by completely extending the piston component out of the cylinder barrel, so that the replacement step of the sealing component is simplified, the replacement efficiency of the sealing component is improved, and meanwhile, a large operation space is not required in the replacement process of the sealing component.

2. According to the utility model, the sealing component and the guide copper sleeve are arranged on the piston but not on the piston rod, so that the surface of the piston rod does not need to be ground and electroplated to prevent rust, and the cost is greatly saved.

3. According to the utility model, the end cover is arranged at one end of the cylinder barrel, the other end of the cylinder barrel is in an open form, and the sealing assembly which is frequently replaced is highly matched, so that the replacement efficiency of the sealing assembly is greatly improved.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic cross-sectional view of a single-acting cylinder and hydraulic equipment of the present utility model;

FIG. 2 is an enlarged schematic view of a partial structure A in FIG. 1 according to the present utility model;

FIG. 3 is an enlarged schematic view of a part of the structure of FIG. 1B according to the present utility model;

FIG. 4 is a front view of the single-acting ram, hydraulic apparatus of the present utility model;

fig. 5 is a top view of the single-acting ram, hydraulic apparatus of the present utility model.

In the figure: 1. a piston assembly; 101. a piston; 102. a piston rod; 103. a club head; 104. an oil passage; 105. an oil port; 106. a first groove; 107. a second groove; 108. a gland; 2. a dust ring; 3. a cylinder; 301. an end cap; 302. an oil chamber; 4. a guide rod; 5. a seal assembly; 501. a V-shaped sealing ring group; 502. a U-shaped ring; 503. a retainer ring; 6. and guiding the copper sleeve.

Detailed Description

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

As shown in fig. 1 to 5, the single-acting cylinder of the present embodiment includes: the cylinder barrel 3, two ends of the cylinder barrel 3 are mutually communicated, and one end of the cylinder barrel 3 is provided with an end cover 301 to form an oil cavity 302; the piston assembly 1, the piston assembly 1 comprises a piston 101, a piston rod 102 and a rod head 103, one end of the piston 101 is connected with one end of the piston rod 102, the other end of the piston rod 102 is connected with the rod head 103, the piston 101 is positioned in the cylinder 3, and the rod head 103 is positioned outside the cylinder 3; and the sealing assembly 5 is sleeved on the piston 101 to seal between the outer wall of the piston 101 and the inner wall of the cylinder barrel 3. When the sealing assembly 5 is replaced, the damaged sealing assembly 5 can be replaced only by fully extending the piston assembly 1 out of the cylinder barrel 3, so that the replacement step of the sealing assembly 5 is simplified, the replacement efficiency of the sealing assembly 5 is improved, and meanwhile, a large operation space is not required in the replacement process of the sealing assembly 5; only be provided with end cover 301 at the one end of cylinder 3, set up the other end of cylinder 3 into open form, highly fit the sealing component 5 of frequent change, very big improvement sealing component 5's change efficiency.

In this embodiment, the club head 103 is provided with an oil channel 104, an oil port 105 is provided on an end surface of the club head 103, and one end of the oil channel 104 is communicated with the oil port 105.

In this embodiment, the outer wall of the piston 101 is also sleeved with a guiding copper sleeve 6. The guiding copper bush 6 is used for guiding the piston assembly 1.

In this embodiment, the seal assembly 5 includes a V-shaped seal ring set 501, a U-shaped ring 502, and a retainer ring 503, where the V-shaped seal ring set 501, the U-shaped ring 502, and the retainer ring 503 are all sleeved on the piston 101, the V-shaped seal ring set 501 is located on one side of the guiding copper bush 6, and the U-shaped ring 502 and the retainer ring 503 are located on the other side of the guiding copper bush 6. Therefore, the V-shaped sealing ring group 501 can seal high-pressure oil in the fourth oil cavity 302, and the U-shaped ring 502 and the check ring 503 can seal the high-pressure oil in the fourth oil cavity 302 again; the V-shaped sealing ring group 501, the U-shaped ring 502, the retainer ring 503 and the guide copper bush 6 are all arranged on the piston 101 but not on the piston 101 rod, and grinding processing and electroplating rust prevention are not needed on the piston 101 rod, so that the cost is greatly saved.

In the present embodiment, the other end of the piston 101 is provided with a gland 108. Specifically, the gland 108 is provided with a hole, the oil cavity 302 is communicated with the oil channel 104 through the hole, and the gland 108 and the piston 101 are fixedly connected through a screw. The V-shaped seal ring set 501 is located between the guide copper sleeve 6 and the gland 108, so that the V-shaped seal ring set 501 is prevented from being separated from the piston 101 during the movement of the cylinder 3.

In this embodiment, the outer wall of the piston 101 is provided with a first groove 106 for installing the U-shaped ring 502 and the retainer ring 503.

In the present embodiment, the piston 101 is a hollow piston, the piston rod 102 is a hollow piston rod, and the oil passage 104 communicates with the oil chamber 302 through the interiors of the piston 101 and the piston rod 102. Thus, the oil can enter the oil cavity 302 through the oil port 105, the oil passage 104, the inside of the piston rod 102 and the inside of the piston 101, and the movement of the cylinder 3 is pushed by the oil.

In this embodiment, a second groove 107 is formed on the outer wall of the piston 101 and at one end of the first groove 106 away from the V-shaped sealing ring set 501, and a dust ring 2 is disposed in the second groove 107. Therefore, dust and particles attached to the inner wall of the cylinder barrel 3 can be scraped by the dust ring 2, the cleaning of the cylinder barrel 3 is ensured, and the damage to the oil caused by the penetration of the dust and the particles into the oil is avoided, so that the burning loss of the oil pump is caused, and the safe operation of equipment is influenced.

In this embodiment, a guide rod 4 is provided on the outside of the cylinder 3, and the guide rod 4 is connected to the cylinder 3. Specifically, a fixed ring is arranged on the outer peripheral surface of the cylinder barrel 3, a guide rod 4 penetrates through the fixed ring and is in sliding connection with the fixed ring, and the guide rod 4 is used for guiding the cylinder barrel 3.

The working principle of the utility model is as follows: when the whole device is used, the rod head 103 is fixedly connected with the frame, and the cylinder barrel 3 is arranged on the frame and moves along with the movement of a load; when the oil port 105 is filled with oil, the oil in the oil tank flows into the oil cavity 302 sequentially through the oil path channel 104, the hollow piston rod, the hollow piston and the hole, and under the action of oil hydraulic pressure, the cylinder 3 is pushed to move upwards along the guide rod 4, and at the moment, the load moves upwards along with the upward movement of the cylinder 3; when the load is retracted, the oil is stopped from entering the oil port 105, at this time, the cylinder 3 is retracted along the guide rod 4 by the load and its own weight, and the oil in the oil cavity 302 sequentially flows back into the oil tank through the oil path channel 104, the hollow piston 101 rod, the oil path channel 104 and the oil port 105.

In summary, in the utility model, the seal assembly 5 is arranged on the piston 101, when the seal assembly 5 is replaced, the damaged seal assembly 5 can be replaced only by completely extending the piston assembly 1 out of the cylinder 3, so that the replacement step of the seal assembly 5 is simplified, the replacement efficiency of the seal assembly 5 is improved, and meanwhile, a large operation space is not required in the replacement process of the seal assembly 5; the sealing component 5 and the guide copper sleeve 6 are arranged on the piston 101 but not on the piston rod 102, so that the surface of the piston rod 102 does not need grinding and electroplating to prevent rust, and the cost is greatly saved; only be provided with end cover 301 at the one end of cylinder 3, set up the other end of cylinder 3 into open form, highly fit the sealing component 5 of frequent change, very big improvement sealing component 5's change efficiency.

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined as the scope of the claims.

Claims

1. A single-acting ram, comprising:

the cylinder barrel (3), two ends of the cylinder barrel (3) are communicated with each other, and an end cover (301) is arranged at one end of the cylinder barrel (3) to form an oil cavity (302);

the piston assembly (1), the piston assembly (1) comprises a piston (101), a piston rod (102) and a rod head (103), one end of the piston (101) is connected with one end of the piston rod (102), the other end of the piston rod (102) is connected with the rod head (103), the piston (101) is positioned in the cylinder barrel (3), and the rod head (103) is positioned outside the cylinder barrel (3);

and the sealing assembly (5) is sleeved on the piston (101) to seal between the outer wall of the piston (101) and the inner wall of the cylinder barrel (3).

2. The single-acting cylinder according to claim 1, wherein the head (103) is provided with an oil passage (104), an oil port (105) is provided on an end surface of the head (103), and one end of the oil passage (104) is communicated with the oil port (105).

3. The single-acting oil cylinder according to claim 1, characterized in that the outer wall of the piston (101) is further sleeved with a guiding copper sleeve (6).

4. A single-acting cylinder as claimed in claim 3 wherein the sealing assembly (5) comprises a V-shaped sealing ring set (501), a U-shaped ring (502) and a retainer ring (503), the V-shaped sealing ring set (501), the U-shaped ring (502) and the retainer ring (503) are all sleeved on the piston (101), the V-shaped sealing ring set (501) is located on one side of the guiding copper bush (6), and the U-shaped ring (502) and the retainer ring (503) are located on the other side of the guiding copper bush (6).

5. The single-acting cylinder according to claim 4, characterized in that the other end of the piston (101) is provided with a gland (108).

6. The single-acting cylinder according to claim 4, characterized in that the outer wall of the piston (101) is provided with a first groove (106) for mounting the U-shaped ring (502) and the retainer ring (503).

7. The single-acting cylinder according to claim 2, wherein the piston (101) is a hollow piston, the piston rod (102) is a hollow piston rod, and the oil passage (104) communicates with the oil chamber (302) through the interiors of the piston (101) and the piston rod (102).

8. The single-acting oil cylinder according to claim 6, wherein a second groove (107) is formed in the outer wall of the piston (101) and located at one end, away from the V-shaped sealing ring set (501), of the first groove (106), and a dust ring (2) is arranged in the second groove (107).

9. Single-acting cylinder according to claim 1, characterized in that the outside of the cylinder (3) is provided with a guide rod (4), which guide rod (4) is connected with the cylinder (3).

10. Hydraulic apparatus, characterized by comprising a single-acting ram according to any of claims 1-9.