CN213870521U - Fast acting three-stage oil cylinder - Google Patents
Fast acting three-stage oil cylinder Download PDFInfo
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- CN213870521U CN213870521U CN202022748494.5U CN202022748494U CN213870521U CN 213870521 U CN213870521 U CN 213870521U CN 202022748494 U CN202022748494 U CN 202022748494U CN 213870521 U CN213870521 U CN 213870521U
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Abstract
The utility model relates to a tertiary hydro-cylinder of fast action, the one-level piston rod sets up in the cylinder body and forms one-level rodless chamber and one-level rodless chamber, first business turn over hydraulic fluid port and one-level rodless chamber intercommunication, the cylinder body is equipped with the second business turn over hydraulic fluid port that has the pole chamber intercommunication with the one-level, be equipped with the second grade piston rod in the one-level piston rod and form the second grade and have pole chamber and second grade rodless chamber, the one-level has pole chamber and second grade rodless chamber intercommunication, tertiary piston rod sets up in the second grade piston rod and forms the third and has pole chamber and tertiary rodless chamber, be equipped with on the tertiary piston rod and have the third oil inlet and outlet of pole chamber intercommunication with the third, be equipped with the check valve in the passageway that the second grade cylinder bottom of second grade piston rod was covered, passageway intercommunication second grade rodless chamber and tertiary rodless chamber, the second grade has the effect cross sectional area in pole chamber the same with the effect cross sectional area in tertiary rodless chamber. The utility model discloses compact structure, the operating time of hydro-cylinder is greatly shortened, realizes the quick action of motion, reduces whole hydraulic system's cost.
Description
Technical Field
The utility model relates to a hydraulic cylinder technical field, in particular to act on tertiary hydro-cylinder fast.
Background
The hydraulic cylinder is used as an actuating element in a hydraulic system and converts hydraulic energy into mechanical energy in a linear reciprocating motion (or rotary swing) mode. The hydraulic cylinder has simple structure and easy manufacture, is particularly convenient for realizing linear reciprocating motion, and has wide application in the fields of aerospace, ships, war industry, engineering machinery, metallurgy, water conservancy and the like.
The multi-stage hydraulic cylinder is designed to achieve a large stroke in a small enough installation space to meet the requirement of an actuating mechanism on the maximum installation distance of the cylinder. The operation speed of a general multistage hydraulic cylinder is limited by the structure of the multistage hydraulic cylinder and the flow of a hydraulic system, and if the speed of the oil cylinder is increased, the drift diameter of an oil inlet of the oil cylinder and the flow of the system are increased, but the appearance of the oil cylinder and the system is enlarged, the power of the system is increased, and the fact that the oil cylinder can operate quickly under the condition of small flow is particularly important. At present, domestic and foreign multi-stage hydraulic cylinders are mainly in a traditional form and cannot meet the design requirements of high speed, large load, small flow and intensification.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve prior art's problem, provide one kind and can realize the rapid action of motion, compact structure, the lower tertiary hydro-cylinder of rapid action of cost.
The specific technical scheme is as follows: a fast acting three-stage oil cylinder comprises a first-stage piston rod, a second-stage piston rod, a third-stage piston rod and a cylinder body, wherein the first-stage piston rod is arranged in the cylinder body and forms a first-stage rodless cavity and a first-stage rod cavity, the cylinder body is provided with a first oil inlet and outlet, the first oil inlet and outlet is communicated with the first-stage rodless cavity, the cylinder body is provided with a second oil inlet and outlet communicated with the first-stage rod cavity, the second-stage piston rod is arranged in the first-stage piston rod and forms a second-stage rod cavity and a second-stage rodless cavity, the first-stage rod cavity is communicated with the second-stage rodless cavity, the third-stage rodless cavity is a closed blind cavity, a third oil inlet and outlet communicated with the third-stage rod cavity is arranged on the third-stage piston rod, a one-way valve is arranged in a channel on a cover at the bottom end of the second-stage piston rod, and the channel is communicated with the second-stage rodless cavity and the third-stage rodless cavity, the effective cross-sectional area of the second-stage rod-containing cavity is the same as that of the third-stage rodless cavity.
According to the preferable scheme, the cylinder body is in threaded connection with the primary guide sleeve, the primary piston rod comprises a first piston, a primary rod cavity is formed between the primary guide sleeve and the first piston, a primary rodless cavity is formed between the bottom end cover of the primary cylinder and the first piston, and the second oil inlet and outlet are arranged opposite to the primary guide sleeve.
As the preferred scheme, the primary guide sleeve is installed on the cylinder barrel through threads, and a sealing ring is arranged between the primary guide sleeve and the primary piston rod.
As the preferred scheme, the primary cylinder bottom end cover is connected with the primary piston rod through threads, and a sealing ring is arranged between the primary cylinder bottom end cover and the primary piston rod.
According to the preferable scheme, a second-stage cylinder bottom end cover is arranged at the bottom of the second-stage piston rod, a second-stage rod cavity is formed among the second-stage piston rod, the first-stage piston rod and the second-stage guide sleeve, the second-stage rod cavity is a closed blind cavity, and a second-stage rodless cavity is formed among the second-stage piston rod, the first-stage cylinder bottom end cover and the second-stage cylinder bottom end cover.
Preferably, the primary piston rod comprises a first piston, and the primary rod cavity is communicated with the secondary rodless cavity through a first oil passage on the first piston.
Preferably, the second-stage guide sleeve is mounted on the first-stage piston rod through threads, a sealing ring is arranged between the second-stage guide sleeve and the second-stage piston rod, the bottom end cover of the second-stage cylinder is mounted at the bottom end of the second-stage piston rod through threads, and the sealing ring is arranged between the second-stage piston rod and the bottom end cover of the second-stage cylinder.
As a preferred scheme, the third-stage piston rod, the second-stage piston rod and the third-stage guide sleeve form a third-stage rod cavity, the bottom end cover of the second-stage cylinder and the second piston form a third-stage rodless cavity, and the third-stage rodless cavity is a closed blind cavity.
As the preferred scheme, a second oil duct is arranged on a second piston of the stage piston rod, and the second oil duct is respectively communicated with the second-stage rod cavity and the third-stage rodless cavity.
According to the preferable scheme, the third-level guide sleeve is installed on the second-level piston rod through threads, a sealing ring is arranged between the third-level guide sleeve and the third-level piston rod, and the second piston is installed on the third-level piston rod and divides an inner cavity of the second-level piston rod into a rod cavity and a rodless cavity.
The technical effects of the utility model: the fast acting three-stage oil cylinder of the utility model has a simple structure, passes the actual function verification, and is mature and reliable in technology and process; the internal structure of the oil cylinder is greatly reduced, the structure is compact, the purpose of reducing the appearance as much as possible is achieved, the action time of the oil cylinder is greatly shortened, and the quick action of a movement mechanism is realized; under the same time and load requirements, the hydraulic system has the characteristic of small required flow, so that the power of the hydraulic system is reduced, and the cost of the whole hydraulic system is reduced.
Drawings
Fig. 1 is a schematic view of a fast-acting three-stage cylinder according to an embodiment of the present invention.
Fig. 2 is a schematic view of a primary piston rod according to an embodiment of the present invention.
Fig. 3 is a schematic view of a two-stage piston rod according to an embodiment of the present invention.
Fig. 4 is a schematic view of the second-stage cylinder bottom end cover according to the embodiment of the present invention.
Fig. 5 is a schematic view of a second piston according to an embodiment of the invention.
Fig. 6 is a schematic view of a three-stage piston rod according to an embodiment of the present invention.
Detailed Description
The essential features and advantages of the invention will be further explained below with reference to examples, but the invention is not limited to the embodiments listed.
As shown in fig. 1 to 6, the fast-acting three-stage cylinder of the present embodiment includes a first-stage piston rod 1, a second-stage piston rod 2, a third-stage piston rod 3, and a cylinder body 4, where the first-stage piston rod 1 is disposed in the cylinder body 4 and forms a first-stage rodless chamber and a first-stage rod chamber. The cylinder body 4 is provided with a first oil inlet and outlet A which is communicated with the first-stage rodless cavity. The cylinder body 4 is provided with a second oil inlet and outlet B communicated with the first-stage rod cavity, a second-stage piston rod 2 is arranged in the first-stage piston rod 1 and forms a second-stage rod cavity and a second-stage rodless cavity, and the first-stage rod cavity is communicated with the second-stage rodless cavity. The three-stage piston rod 3 is arranged in the two-stage piston rod 2 and forms a three-stage rod cavity and a three-stage rodless cavity, the three-stage rodless cavity is a closed blind cavity, and a third oil inlet and outlet C communicated with the three-stage rod cavity is formed in the three-stage piston rod 3. A one-way valve 5 is arranged in a channel 211 on a second-stage cylinder bottom end cover 21 of the second-stage piston rod 2, the channel 211 is communicated with a second-stage rodless cavity and a third-stage rod cavity, and the acting cross-sectional area of the second-stage rod cavity is the same as that of the third-stage rodless cavity. Among the above-mentioned technical scheme, through design first, the second business turn over oilhole on the wall of one-level piston rod, second grade piston rod for 4 inner structures of hydro-cylinder are by a wide margin reduced, and compact structure has reached the purpose that the appearance reduces as far as possible. Through setting up check valve 5, install on second grade jar bottom end cover 21, the oil direction leads to tertiary pole chamber for leading to from tertiary rodless chamber, can be at initial stage through second grade rodless chamber to the blind intracavity that second grade has the pole chamber to be linked together with tertiary rodless chamber oil charge. The design that the second-level piston rod and the third-level piston rod synchronously extend and retract is adopted, so that the action time of the oil cylinder is greatly shortened, and the quick action of the movement mechanism is realized. The structural characteristics of the oil cylinder enable the oil cylinder to have the characteristic of small required flow under the same time and load requirements, so that the power of a hydraulic system is reduced, and the cost of the whole hydraulic system is reduced; the action section area of the second-stage rod cavity is the same as that of the third-stage rodless cavity, and the purpose of synchronously extending and retracting the second-stage and third-stage piston rods at a constant speed is achieved.
In this embodiment, the cylinder body 4 is in threaded connection with the first-stage guide sleeve 6, the first-stage piston rod 1 includes the first piston 11, a first-stage rod cavity is formed between the first-stage guide sleeve 6 and the first piston 11, a first-stage rodless cavity is formed between the first-stage cylinder bottom end cover 12 and the first piston 11, and the second oil inlet/outlet B is arranged opposite to the first-stage guide sleeve 6.
In this embodiment, the first-level guide sleeve 6 is installed on the cylinder 42 through threads, and a seal ring is arranged between the first-level guide sleeve 6 and the first-level piston rod 1, so that the first-level guide sleeve is convenient to install and seal.
In this embodiment, the primary cylinder bottom end cap 12 is connected to the primary piston rod 1 through a thread, and a seal ring is disposed between the primary cylinder bottom end cap 12 and the primary piston rod 1.
In this embodiment, the second-stage cylinder bottom end cap 22 is disposed at the bottom of the second-stage piston rod 2, a second-stage rod cavity is formed between the second-stage piston rod 2 and the first-stage piston rod 1, and between the second-stage piston rod 2 and the second-stage guide sleeve 7, the second-stage rod cavity is a closed blind cavity, and a second-stage rodless cavity is formed between the second-stage piston rod 2 and the first-stage cylinder bottom end cap 12, and between the second-stage cylinder bottom end cap 22.
In the present embodiment, the primary rod chamber and the secondary rodless chamber communicate with each other through the first oil passage 111 of the first piston 11.
In this embodiment, the second-stage guide sleeve 7 is installed on the first-stage piston rod 1 through a thread, a seal ring is arranged between the second-stage piston rod 2 and the second-stage guide sleeve, the second-stage cylinder bottom end cover 22 is installed at the bottom end of the second-stage piston rod 2 through a thread, and a seal ring is arranged between the second-stage piston rod 2 and the second-stage guide sleeve.
In this embodiment, the tertiary piston rod 3, the secondary piston rod 2 and the tertiary guide sleeve 8 form a tertiary rod cavity, the secondary cylinder bottom end cap 22 and the second piston 23 form a tertiary rodless cavity, and the tertiary rodless cavity is a closed blind cavity. And a pressure measuring oil port D for detecting the pressure of the three-stage rodless cavity is arranged on the three-stage piston rod 3.
In this embodiment, the piston portion 24 of the secondary piston rod 2 is provided with a second oil passage 241, and the second oil passage 241 is respectively communicated with the secondary rod-containing cavity and the tertiary rod-free cavity.
In this embodiment, tertiary uide bushing 8 passes through the screw thread and installs on second grade piston rod 2, is equipped with the sealing washer between tertiary uide bushing 8 and the tertiary piston rod 3, the second piston is installed on tertiary piston rod 3, divide into the cavity of having the pole and the no pole cavity with second grade piston rod 2 inner chamber.
The fast-acting three-stage oil cylinder is simple in structure, passes through practical function verification, and is mature and reliable in technology and process; the internal structure of the oil cylinder is greatly reduced, the structure is compact, the purpose of reducing the appearance as much as possible is achieved, the action time of the oil cylinder is greatly shortened, and the quick action of a movement mechanism is realized; under the same time and load requirements, the hydraulic system has the characteristic of small required flow, so that the power of the hydraulic system is reduced, and the cost of the whole hydraulic system is reduced.
It should be noted that the above-mentioned preferred embodiments are only for illustrating the technical concepts and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention accordingly, and the protection scope of the present invention cannot be limited thereby. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. A fast acting three-stage oil cylinder is characterized by comprising a first-stage piston rod, a second-stage piston rod, a three-stage piston rod and a cylinder body, wherein the first-stage piston rod is arranged in the cylinder body and forms a first-stage rodless cavity and a first-stage rod cavity, the cylinder body is provided with a first oil inlet and outlet, the first oil inlet and outlet is communicated with the first-stage rodless cavity, the cylinder body is provided with a second oil inlet and outlet communicated with the first-stage rod cavity, the second-stage piston rod is arranged in the first-stage piston rod and forms a second-stage rod cavity and a second-stage rodless cavity, the first-stage rod cavity is communicated with the second-stage rodless cavity, the third-stage rodless cavity is a closed blind cavity, a third oil inlet and outlet communicated with the third-stage rod cavity is arranged on the third-stage piston rod, a one-way valve is arranged in a channel on a second-stage cylinder bottom end cover of the second-stage piston rod and the third-stage rodless cavity are communicated with the channel, the effective cross-sectional area of the second-stage rod-containing cavity is the same as that of the third-stage rodless cavity.
2. The fast acting three-stage oil cylinder according to claim 1, wherein the cylinder body is in threaded connection with a first-stage guide sleeve, the first-stage piston rod comprises a first piston, a first-stage rod cavity is formed between the first-stage guide sleeve and the first piston, a first-stage rodless cavity is formed between a bottom end cover of the first-stage cylinder and the first piston, and the second oil inlet/outlet is arranged opposite to the first-stage guide sleeve.
3. The fast acting three-stage cylinder according to claim 2, wherein the primary guide sleeve is mounted on the cylinder barrel by a thread, and a seal ring is provided between the primary guide sleeve and the primary piston rod.
4. The fast acting three-stage cylinder according to claim 3, wherein the primary cylinder bottom end cap is connected to the primary piston rod by a thread, and a seal ring is provided between the primary cylinder bottom end cap and the primary piston rod.
5. The fast acting three-stage oil cylinder according to claim 4, wherein the bottom of the secondary piston rod is provided with a secondary cylinder bottom end cap, a secondary rod cavity is formed between the secondary piston rod and the primary piston rod and the secondary guide sleeve, the secondary rod cavity is a closed blind cavity, and a secondary rodless cavity is formed between the secondary piston rod and the primary cylinder bottom end cap and the secondary cylinder bottom end cap.
6. The fast acting three stage cylinder according to claim 5 wherein the primary piston rod comprises a first piston and the primary rodless chamber is in communication with the secondary rodless chamber via a first oil passage in the first piston.
7. The fast acting three-stage oil cylinder according to claim 6, wherein the secondary guide sleeve is threadedly mounted on the primary piston rod with a seal ring disposed therebetween, and the secondary cylinder bottom end cap is threadedly mounted on the secondary piston rod with a seal ring disposed therebetween.
8. The fast acting three-stage cylinder according to claim 7, wherein the three-stage piston rod forms a three-stage rod chamber with the two-stage piston rod and the three-stage guide sleeve, the two-stage cylinder bottom end cap forms a three-stage rodless chamber with the second piston, and the three-stage rodless chamber is a closed blind chamber.
9. The fast acting three-stage cylinder according to claim 8, wherein the piston portion of the two-stage piston rod is provided with a second oil passage, and the second oil passage communicates with the two-stage rod chamber and the three-stage rodless chamber, respectively.
10. The fast-acting three-stage oil cylinder according to claim 9, wherein the three-stage guide sleeve is installed on the second-stage piston rod through threads, a seal ring is arranged between the three-stage guide sleeve and the third-stage piston rod, and the second piston is installed on the third-stage piston rod to divide an inner cavity of the second-stage piston rod into a rod cavity and a rodless cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022748494.5U CN213870521U (en) | 2020-11-25 | 2020-11-25 | Fast acting three-stage oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022748494.5U CN213870521U (en) | 2020-11-25 | 2020-11-25 | Fast acting three-stage oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213870521U true CN213870521U (en) | 2021-08-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022748494.5U Active CN213870521U (en) | 2020-11-25 | 2020-11-25 | Fast acting three-stage oil cylinder |
Country Status (1)
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|---|---|
| CN (1) | CN213870521U (en) |
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2020
- 2020-11-25 CN CN202022748494.5U patent/CN213870521U/en active Active
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Legal Events
| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.2667, Xinglong Avenue, Yongchuan District, Chongqing 402160 Patentee after: China Shipbuilding Chongqing Hydraulic Electromechanical Co.,Ltd. Address before: No.2667, Xinglong Avenue, Yongchuan District, Chongqing 402160 Patentee before: CSIC CHONGQING HYDRAULIC MECHANICAL-ELECTRONICAL Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |