CN214331055U - Hydraulic cylinder unloading structure - Google Patents
Hydraulic cylinder unloading structure Download PDFInfo
- Publication number
- CN214331055U CN214331055U CN202120268574.2U CN202120268574U CN214331055U CN 214331055 U CN214331055 U CN 214331055U CN 202120268574 U CN202120268574 U CN 202120268574U CN 214331055 U CN214331055 U CN 214331055U
- Authority
- CN
- China
- Prior art keywords
- cylinder body
- unloading
- piston
- cylinder
- oil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 28
- 239000010720 hydraulic oil Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 230000003749 cleanliness Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Abstract
The utility model provides a hydraulic cylinder unloading structure, which comprises a cylinder body, a piston arranged in the cylinder body and a piston rod penetrating in the piston, wherein the cylinder body is provided with an upper oil cavity and a lower oil cavity; a second unloading channel is arranged on the cylinder body at the bottom of the first unloading channel, and the diameter of the second unloading channel is smaller than the outer diameter of the cylinder body and larger than the inner diameter of the cylinder body; the bottom of the piston is provided with a buffer device which is against the piston and is connected with the bottom wall of the cylinder body. The utility model discloses load in the hydro-cylinder is reduced to simple structure, dependable performance, by a large margin.
Description
Technical Field
The utility model mainly relates to a hydro-cylinder technical field especially relates to a hydraulic cylinder off-load structure.
Background
At present, the unloading of the hydraulic cylinder is mainly carried out by adopting a liquid filling valve or a proportional valve. The unloading of the liquid charging valve adopts the big valve core to be opened after the small valve core is unloaded, thereby achieving the purpose of unloading the main cylinder; the hydraulic system has large impact and the service life of the elements is influenced. The proportional valve is adopted for unloading, an unloading pressure curve can be set, but the hardware cost is high, the requirement on the use environment is high, the requirement on the cleanliness of hydraulic oil is particularly high, the proportional valve is not suitable for occasions with low cleanliness of the hydraulic oil, and the use range of the product is influenced.
SUMMERY OF THE UTILITY MODEL
Aiming at the defects in the prior art, the utility model provides a hydraulic cylinder unloading structure, which comprises a cylinder body, a piston arranged in the cylinder body and a piston rod penetrating in the piston, wherein the cylinder body is provided with an upper oil cavity and a lower oil cavity, the side wall of the middle part of the cylinder body is provided with a first unloading channel, the outer side of the first unloading channel is provided with an oil storage tank, and the first unloading channel is communicated with the oil storage tank; a second unloading channel is arranged on the cylinder body at the bottom of the first unloading channel, and the diameter of the second unloading channel is smaller than the outer diameter of the cylinder body and larger than the inner diameter of the cylinder body; the bottom of the piston is provided with a buffer device which is abutted against the piston and is connected with the bottom wall of the cylinder body.
Preferably, the first unloading channel can be connected with an oil outlet pipe, and a check valve is arranged on the oil outlet pipe.
Preferably, the damping device is a spring.
Preferably, the top of the cylinder body is provided with an oil inlet.
Preferably, a first sealing ring is annularly arranged on the piston.
Preferably, an oil outlet is formed in the bottom of the cylinder body.
Preferably, a second sealing ring is arranged at the top of the movable cylinder body.
The utility model has the advantages that: simple structure, reliable performance and great reduction of the internal load of the oil cylinder.
Drawings
Fig. 1 is a cross-sectional view of the present invention;
Detailed Description
In order to make the technical solutions of the present invention better understood and make the above features, objects, and advantages of the present invention more comprehensible, the present invention is further described with reference to the following examples. The examples are intended to illustrate the invention only and are not intended to limit the scope of the invention.
As shown in fig. 1, the present invention includes: the piston type cylinder comprises a cylinder body 1, a piston 2 arranged in the cylinder body 1 and a piston rod 3 penetrating into the piston 2, wherein the cylinder body 1 is provided with an upper oil cavity 10 and a lower oil cavity 11, the side wall of the middle part of the cylinder body 1 is provided with a first unloading channel 4, an oil storage tank 5 is arranged on the outer side of the first unloading channel 4, and the first unloading channel 4 is communicated with the oil storage tank 5; a second unloading channel 6 is arranged on the cylinder body 1 at the bottom of the first unloading channel 4, and the diameter of the second unloading channel 6 is smaller than the outer diameter of the cylinder body 1 and larger than the inner diameter of the cylinder body 1; the bottom of the piston 2 is provided with a buffer device 7, the buffer device 7 is abutted against the piston 2, and the bottom wall of the cylinder body 1 is connected below.
In this embodiment, the first unloading channel 4 may be connected to an oil outlet pipe, and a check valve is disposed on the oil outlet pipe.
In the present embodiment, the buffer 7 is preferably a spring.
In this embodiment, it is preferable that the top of the cylinder block 1 is provided with an oil inlet 8.
In this embodiment, the piston 2 is preferably provided with a first sealing ring 9 on the ring.
In the present embodiment, it is preferable that the bottom of the cylinder 1 is provided with an oil outlet 12.
In the present embodiment, it is preferable that the top of the cylinder body 1 is provided with a second sealing ring 13.
When the hydraulic oil unloading device is used, the piston rod is pressed to move downwards to exert pressure on the buffer device, the piston rod moves downwards, the hydraulic oil enters the oil storage tank through the first unloading channel, if the hydraulic oil is too much, the oil storage tank cannot bear the load, the redundant hydraulic oil enters the lower oil cavity through the second unloading channel, unloading is completed, and the buffer device is reset.
The above-described embodiments are merely illustrative of the principles and utilities of the present patent application and are not intended to limit the present patent application. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of this patent application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of this patent application.
Claims (7)
1. The unloading structure of the hydraulic oil cylinder is characterized by comprising a cylinder body (1), a piston (2) arranged in the cylinder body (1) and a piston rod (3) penetrating into the piston (2), wherein the cylinder body (1) is provided with an upper oil cavity (10) and a lower oil cavity (11), a first unloading channel (4) is arranged on the side wall of the middle part of the cylinder body (1), an oil storage tank (5) is arranged on the outer side of the first unloading channel (4), and the first unloading channel (4) is communicated with the oil storage tank (5);
a second unloading channel (6) is arranged on the cylinder body (1) at the bottom of the first unloading channel (4), and the diameter of the second unloading channel (6) is smaller than the outer diameter of the cylinder body (1) and larger than the inner diameter of the cylinder body (1);
the bottom of the piston (2) is provided with a buffer device (7), the buffer device (7) is abutted against the piston (2) and is connected with the bottom wall of the cylinder body (1) at the lower part.
2. The hydraulic cylinder unloading structure according to claim 1, characterized in that: the first unloading channel (4) can be connected with an oil outlet pipe, and a check valve is arranged on the oil outlet pipe.
3. The hydraulic cylinder unloading structure according to claim 1, characterized in that: the buffer device (7) is a spring.
4. The hydraulic cylinder unloading structure according to claim 1, characterized in that: an oil inlet (8) is formed in the top of the cylinder body (1).
5. The hydraulic cylinder unloading structure according to claim 1, characterized in that: and a first sealing ring (9) is annularly arranged on the piston (2).
6. The hydraulic cylinder unloading structure according to claim 1, characterized in that: an oil outlet (12) is arranged at the bottom of the cylinder body (1).
7. The hydraulic cylinder unloading structure according to claim 1, characterized in that: and a second sealing ring (13) is arranged at the top of the movable cylinder body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120268574.2U CN214331055U (en) | 2021-01-29 | 2021-01-29 | Hydraulic cylinder unloading structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120268574.2U CN214331055U (en) | 2021-01-29 | 2021-01-29 | Hydraulic cylinder unloading structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214331055U true CN214331055U (en) | 2021-10-01 |
Family
ID=77907552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120268574.2U Expired - Fee Related CN214331055U (en) | 2021-01-29 | 2021-01-29 | Hydraulic cylinder unloading structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214331055U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183431A (en) * | 2021-12-03 | 2022-03-15 | 建湖县八达液压机械有限公司 | High-precision hydraulic oil cylinder unloading structure |
-
2021
- 2021-01-29 CN CN202120268574.2U patent/CN214331055U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114183431A (en) * | 2021-12-03 | 2022-03-15 | 建湖县八达液压机械有限公司 | High-precision hydraulic oil cylinder unloading structure |
| CN114183431B (en) * | 2021-12-03 | 2024-02-13 | 建湖县八达液压机械有限公司 | High-precision hydraulic cylinder unloading structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211001 |