CN212106446U - Two-stage air cylinder - Google Patents
Two-stage air cylinder Download PDFInfo
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- CN212106446U CN212106446U CN202022128026.8U CN202022128026U CN212106446U CN 212106446 U CN212106446 U CN 212106446U CN 202022128026 U CN202022128026 U CN 202022128026U CN 212106446 U CN212106446 U CN 212106446U
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Abstract
The utility model discloses a two-stage cylinder, which comprises a cylinder barrel, a piston assembly, a front cover and a rear cover, wherein the piston assembly comprises a first piston and a second piston, the first piston is in sliding fit with the cylinder barrel, a first piston rod and a second piston rod are respectively fixed at two ends of the first piston, the first piston rod passes through the front cover and is in sliding fit with the front cover, and the second piston rod passes through the rear cover and is in sliding fit with the rear cover; a piston cavity for accommodating a second piston is arranged in the first piston, a third piston rod is fixed on the second piston, the third piston rod penetrates through the second piston and is in sleeve fit with the first piston rod, and the third piston rod penetrates out of the outer side of the cylinder barrel; a working port A communicated with the inner cavity of the cylinder barrel is arranged on the front cover, a working port B communicated with the inner cavity of the cylinder barrel is arranged on the rear cover, and a working port C and a working port D communicated with the piston cavity are arranged on the second piston rod; the outer side end of the third piston rod is provided with a threaded sleeve matched with the stop of the first piston rod. The utility model discloses simple structure, adjustable and the wide advantage of application scope of stroke have been possessed.
Description
Technical Field
The utility model relates to a pneumatic element technical field, in particular to doublestage cylinder.
Background
At present, with the development of pneumatic technology, cylinders are widely applied to modern industrial automation. A pneumatic actuator for converting the pressure energy of the compressed gas into mechanical energy in the pneumatic transmission; the air cylinder is roughly divided into a single-acting air cylinder, a double-acting air cylinder, a diaphragm type air cylinder and an impact air cylinder and mainly comprises a cylinder barrel, an end cover, a piston rod, a sealing element and the like. At present, the effective stroke of a piston in an air cylinder is always fixed and unchanged, and the application range and the use are limited; when a larger stroke is needed, the cylinder with a larger length is replaced, a larger installation space is needed, the defects of large volume and difficulty in arrangement of the installation space are also faced, and the requirement is difficult to meet.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a simple structure, the adjustable and wide doublestage cylinder of application scope of stroke to prior art's defect and not enough.
The utility model provides a technical scheme that its technical problem adopted is: a two-stage cylinder comprises a cylinder barrel, a piston assembly, a front cover and a rear cover, wherein the front cover and the rear cover are respectively covered at two ends of the cylinder barrel; a piston cavity is arranged in the first piston, the second piston is in sliding sealing fit with the inner side wall of the piston cavity, a third piston rod is fixed on the second piston, the third piston rod penetrates through the second piston and is in sleeve fit with the first piston rod, and the third piston rod penetrates out of the outer side of the cylinder barrel; the front cover is provided with a working port A communicated with the inner cavity of the cylinder barrel, the rear cover is provided with a working port B communicated with the inner cavity of the cylinder barrel, and the second piston rod is provided with a working port C and a working port D communicated with the piston cavity; and a threaded sleeve matched with the first piston rod in a stop way is arranged at the outer side end of the third piston rod.
Further, the first piston comprises a piston main body and a piston cover, the piston main body is in sealing fit with the piston cover, and the piston main body and the piston cover are jointly matched to form the piston cavity; the first piston is convenient to manufacture and install.
Furthermore, a first channel communicated with the working port C and the piston cavity is arranged on the piston main body, and a second channel communicated with the working port D and the piston cavity is arranged on the second piston rod.
Further, the first channel is arranged on one end surface of the second piston, and the second channel is arranged on the other end surface of the second piston; the action of the second piston is convenient to control, and the third piston rod is extended or retracted.
Further, the working port a is arranged on one end surface of the first piston, and the working port B is arranged on the other end surface of the first piston; the action of the first piston is convenient to control, and the first piston rod, the second piston rod, the third piston rod and the third piston rod are extended or retracted.
Further, a Y-shaped ring and a wear-resistant belt are respectively sleeved on the second piston and the piston main body; the sealing performance is improved, the wear resistance of the corresponding piston is improved, and the service life is prolonged.
Further, a gasket corresponding to the first piston rod is arranged on the threaded sleeve; play the effect of buffering shock attenuation, make the motion steady.
Furthermore, a limit nut matched with the threaded sleeve in a stop way is further connected to the third piston rod in a threaded manner, and the limit nut is arranged at the end far away from the gasket; the looseness of the threaded sleeve is avoided, and the connection is reliable.
Furthermore, copper sleeves are sleeved in the front cover and the rear cover, and the two copper sleeves are respectively in sliding fit with the first piston rod and the second piston rod; the movement is smooth.
Furthermore, the front cover and the rear cover are respectively provided with dust covers, the two dust covers are respectively in sleeve fit with the first piston rod and the second piston rod, dust rings are embedded in the two dust covers, and the two dust rings are respectively in sliding seal fit with the first piston rod and the second piston rod; the dust-proof and dirt-proof function is achieved, cleanness is kept, and the service life is prolonged.
The utility model has the advantages that: firstly, a piston cavity is arranged in a first piston, a second piston is in sliding sealing fit with the inner side wall of the piston cavity, a third piston rod is fixed on the second piston, the third piston rod penetrates through the second piston and is in sleeve fit with the first piston rod, the third piston rod penetrates out of the outer side of a cylinder barrel, when a working port A or a working port B is filled with gas, the compressed gas enables a piston assembly to slide relative to the cylinder barrel, so that the first piston rod and the second piston rod are driven to extend or retract, first-stage action of the cylinder is realized, and at the moment, the second piston and the third piston rod are static relative to the second piston; when the working port C or the working port D is filled with gas, the compressed gas enables the second piston to slide relative to the piston cavity, so that the third piston rod is driven to extend or retract, the second-stage action of the cylinder is realized, compared with the cylinder in the prior art, the cylinder can realize two-stage action under the same length, the movable stroke is longer, the relative volume is smaller, and the installation is convenient; secondly, the threaded sleeve matched with the first piston rod in a stop way is arranged at the outer side end of the third piston rod, and when the adjustable type piston rod is used, the threaded sleeve can be adjusted to change the distance between the threaded sleeve and the first piston rod, so that the distance between the first piston rod and the third piston rod is adjusted, the stroke is changed, the application range is wider, and the use is more convenient; generally, the utility model discloses possess simple structure, the stroke is adjustable and application scope is wide advantage.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Shown in the figure: 1-a cylinder barrel; 2-a piston assembly; 21-a first piston; 211-a piston body; 211.1-first channel; 212-piston cap; 2121-convex ring; 22-a second piston; 23-a first piston rod; 24-a second piston rod; 24.1-working port C; 24.2-working port D; 24.3-a second channel; 25-a piston cavity; 26-a third piston rod; 3-front cover; 3.1-working port A; 3.2-ring groove; 3.3-pressure regulating holes; 3.4-orifice throttling; 4-rear cover; 4.1-working port B; 5-thread sleeve; 6-Y-shaped ring; 7-a wear resistant band; 8-a gasket; 9-a limit nut; 10-copper sheathing; 11-a dust cover; 12-a dust ring; 13-a pull rod; 14-a sealing ring; 15-a buffer ring; 16-needle valve.
Detailed Description
For a more intuitive and complete understanding of the technical solution of the present invention, the following non-limiting characteristic description is now performed by combining the drawings of the present invention:
as shown in fig. 1, a two-stage cylinder includes a cylinder barrel 1, a piston assembly 2, and a front cover 3 and a rear cover 4 respectively covering two ends of the cylinder barrel 1, the piston assembly 2 includes a first piston 21 and a second piston 22, the first piston 21 is in sliding sealing fit with an inner side wall of the cylinder barrel 1, two ends of the first piston 21 are respectively fixed with a first piston rod 23 and a second piston rod 24, the first piston rod 23 passes through the front cover 3 and is in sliding sealing fit with the front cover 3, and the second piston rod 24 passes through the rear cover 4 and is in sliding sealing fit with the rear cover; a piston cavity 25 is arranged in the first piston 21, the second piston 22 is in sliding sealing fit with the inner side wall of the piston cavity 25, a third piston rod 26 is fixed on the second piston 22, the third piston rod 26 penetrates through the second piston 22 and is in sleeve fit with the first piston rod 23, and the third piston rod 26 penetrates through the outer side of the cylinder barrel 1; a working port A3.1 communicated with the inner cavity of the cylinder barrel 1 is arranged on the front cover 3, a working port B4.1 communicated with the inner cavity of the cylinder barrel 1 is arranged on the rear cover 4, and a working port C24.1 and a working port D24.2 communicated with the piston cavity 25 are arranged on the second piston rod 24; the outer end of the third piston rod 26 is provided with a threaded sleeve 5 which is matched with the first piston rod 23 in a stop way.
Specifically, the front cover 3 and the rear cover 4 are fixed at two ends of the cylinder barrel 1 through a plurality of pull rods 13; when the device is installed, two ends of the pull rod 13 respectively penetrate through the front cover 3 and the rear cover 4 and are fixed through the hexagonal nuts; sealing rings 14 are respectively arranged between the front cover 3 and the cylinder barrel 1 and between the rear cover 4 and the cylinder barrel 1, so that the sealing property of the cylinder barrel 1 is ensured; similarly, sealing rings 14 are respectively arranged between the front cover 3 and the dust cover 11 and between the rear cover 4 and the dust cover 11, so that the sealing performance of the cylinder barrel 1 is ensured.
The first piston 21 comprises a piston main body 211 and a piston cover 212, wherein the piston main body 211 is in sealing fit with the piston cover 212, and the piston main body 211 and the piston cover 212 are matched together to form a piston cavity 25; preferably, a sealing ring 14 is provided between the piston body 211 and the piston cover 212, and the sealing ring 14 is provided at the matching position of each component to ensure the sealing property.
A first channel 211.1 which is communicated with the working port C24.1 and the piston cavity 25 is arranged on the piston main body 211, and a second channel 24.3 which is communicated with the working port D24.2 and the piston cavity 25 is arranged on the second piston rod 24; the first channel 211.1 is arranged at one end face of the second piston 22 and the second channel 24.3 is arranged at the other end face of the second piston 22.
The working a port 3.1 is provided on one end face of the first piston 21, and the working B port 4.1 is provided on the other end face of the first piston 21.
The second piston 22 and the piston main body 211 are respectively sleeved with a Y-shaped ring 6 and a wear-resistant belt 7; specifically, two Y-shaped rings 6 which are symmetrically arranged are arranged on the first piston 22, and a wear-resistant belt 7 is arranged between the two Y-shaped rings 6; similarly, the piston body 211 is also mounted in this way, so that the sealing performance is improved.
The thread sleeve 5 is provided with a gasket 8 corresponding to the first piston rod 23; the third piston rod 26 is further in threaded connection with a limit nut 9 matched with the threaded sleeve 5 in a stop mode, and the limit nut 9 is arranged at the end far away from the gasket 8.
Be equipped with dust cover 11 on protecgulum 3 and the hou gai 4 respectively, two dust covers 11 cup joint the cooperation with first piston rod 23, second piston rod 24 respectively, all inlay in two dust covers 11 and be equipped with dust ring 12, two dust ring 12 respectively with first piston rod 23, second piston rod 24 sliding seal cooperation.
It is worth mentioning that the piston cover 212 is provided with a convex ring 2121, the front cover 3 is internally provided with a ring groove 3.2 which is matched with the convex ring 2121 in an inserting way, the working port A is communicated with the ring groove 3.2, the ring groove 3.2 is internally provided with a buffer ring 15, the buffer ring 15 is arranged at the end close to the convex ring 2121, and the buffer ring 15 is matched with the convex ring 2121 in a sealing way; the front cover 3 is provided with a pressure regulating hole 3.3 communicated with the ring groove 3.2, the front cover 3 is also provided with a small throttling hole 3.4 communicated with the pressure regulating hole 3.3 and the inner cavity of the cylinder barrel 1, a needle valve 16 is arranged in the pressure regulating hole 3.3, and the inner side end of the needle valve 16 is conical; when the piston cover 212 moves towards the front cover 3, the convex ring 2121 is not inserted into the annular groove 3.2, the gas between the piston cover 212 and the front cover 3 is rapidly exhausted from the working port A3.1 through the annular groove 3.2, and the piston assembly 2 moves normally; after the convex ring 2121 is inserted into the ring groove 3.2, the convex ring 2121 is in sealing fit with the buffer ring 15, so that gas at the position cannot be discharged from the ring groove 3.2, only slowly passes through the small throttling hole 3.4, then sequentially passes through the pressure regulating hole 3.3 and the ring groove 3.2, and finally is slowly discharged from the working A port 3.1, so that the piston assembly 2 moves slowly, and a buffer effect is achieved; the needle valve 16 can be adjusted, the opening degree of the pressure regulating hole 3.3 is controlled, and the gas discharge speed is adjusted, so that the buffer speed is adjusted; in actual use, the buffer structure can be arranged on the rear cover 4 to realize bidirectional buffer.
The utility model discloses a concrete theory of operation as follows: each working port is communicated with the gas path in advance, when gas is filled from the working port B4.1 during the first-stage action, the compressed gas enables the piston assembly 2 to slide relative to the cylinder barrel 1, at the moment, the first piston 21 approaches to the front cover 3, the first piston rod 23 and the third piston rod 26 simultaneously extend relative to the cylinder barrel 1, the second piston rod 24 retracts relative to the cylinder barrel 1, and the working port A3.1 exhausts the gas; on the contrary, the gas is filled from the working port A3.1, the first piston rod 23 and the third piston rod 26 retract relative to the cylinder barrel 1 simultaneously, the second piston rod 24 extends relative to the cylinder barrel 1, and the gas is discharged from the working port B4.1;
during the second-stage action, when gas is filled from the working D port 24.2, the compressed gas enables the second piston 22 to slide relative to the piston cavity 25, so that the third piston rod 26 is driven to extend, and the working C port 24.1 discharges the gas; conversely, when gas is filled from the working port C24.1, the third piston rod 26 retracts and the working port D24.2 exhausts gas.
When the stroke needs to be adjusted, as shown in fig. 1, the screw sleeve 5 is rotated and moved downward relative to the third piston rod 26, and the screw sleeve 5 is in stop fit with the first piston rod 23, so that the third piston rod 26 moves upward and extends relative to the cylinder barrel 1, and the shortest extending stroke of the cylinder is prolonged; conversely, the screw sleeve 5 is rotated and moved upwards relative to the third piston rod 26, so that the third piston rod 26 is moved downwards and retracted relative to the cylinder tube 1, whereby the shortest extension stroke of the cylinder is shortened.
The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.
Claims (10)
1. The utility model provides a doublestage cylinder, includes cylinder (1), piston assembly (2) and covers respectively and locates protecgulum (3) and hou gai (4), its characterized in that at cylinder (1) both ends: the piston assembly (2) comprises a first piston (21) and a second piston (22), the first piston (21) is in sliding seal fit with the inner side wall of the cylinder barrel (1), a first piston rod (23) and a second piston rod (24) are respectively fixed at two ends of the first piston (21), the first piston rod (23) penetrates through the front cover (3) and is in sliding seal fit with the front cover, and the second piston rod (24) penetrates through the rear cover (4) and is in sliding seal fit with the rear cover;
a piston cavity (25) is arranged in the first piston (21), the second piston (22) is in sliding sealing fit with the inner side wall of the piston cavity (25), a third piston rod (26) is fixed on the second piston (22), the third piston rod (26) penetrates through the second piston (22) and is in sleeve fit with the first piston rod (23), and the third piston rod (26) penetrates out of the outer side of the cylinder barrel (1);
a working A port (3.1) communicated with the inner cavity of the cylinder barrel (1) is arranged on the front cover (3), a working B port (4.1) communicated with the inner cavity of the cylinder barrel (1) is arranged on the rear cover (4), and a working C port (24.1) and a working D port (24.2) communicated with the piston cavity (25) are arranged on the second piston rod (24);
the outer side end of the third piston rod (26) is provided with a threaded sleeve (5) which is matched with the first piston rod (23) in a stop way.
2. The dual stage cylinder as set forth in claim 1 wherein: the first piston (21) comprises a piston main body (211) and a piston cover (212), the piston main body (211) is in sealing fit with the piston cover (212), and the piston main body (211) and the piston cover (212) are matched together to form the piston cavity (25).
3. The dual stage cylinder as set forth in claim 2 wherein: the piston is characterized in that a first channel (211.1) communicated with the working port C (24.1) and the piston cavity (25) is arranged on the piston main body (211), and a second channel (24.3) communicated with the working port D (24.2) and the piston cavity (25) is arranged on the second piston rod (24).
4. The dual stage cylinder as set forth in claim 3 wherein: the first channel (211.1) is arranged on one end face of the second piston (22), and the second channel (24.3) is arranged on the other end face of the second piston (22).
5. The dual stage cylinder as set forth in claim 4 wherein: the working A port (3.1) is arranged on one end face of the first piston (21), and the working B port (4.1) is arranged on the other end face of the first piston (21).
6. The dual stage cylinder as set forth in claim 5 wherein: the second piston (22) and the piston main body (211) are respectively sleeved with a Y-shaped ring (6) and a wear-resistant belt (7).
7. The dual stage cylinder as set forth in claim 1 wherein: and a gasket (8) corresponding to the first piston rod (23) is arranged on the threaded sleeve (5).
8. The dual stage cylinder as set forth in claim 7 wherein: and the third piston rod (26) is also in threaded connection with a limit nut (9) matched with the stop of the threaded sleeve (5), and the limit nut (9) is arranged at the end far away from the gasket (8).
9. The dual stage cylinder as set forth in claim 1 wherein: copper sleeves (10) are sleeved in the front cover (3) and the rear cover (4), and the two copper sleeves (10) are in sliding fit with the first piston rod (23) and the second piston rod (24) respectively.
10. The dual stage cylinder as set forth in claim 9 wherein: the utility model discloses a dustproof structure, including protecgulum (3) with be equipped with dust cover (11) on back lid (4) respectively, two dust cover (11) respectively with first piston rod (23) second piston rod (24) cup joint the cooperation, two all inlay in dust cover (11) and be equipped with dust ring (12), two dust ring (12) respectively with first piston rod (23) second piston rod (24) sliding seal cooperation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022128026.8U CN212106446U (en) | 2020-09-25 | 2020-09-25 | Two-stage air cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022128026.8U CN212106446U (en) | 2020-09-25 | 2020-09-25 | Two-stage air cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212106446U true CN212106446U (en) | 2020-12-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022128026.8U Active CN212106446U (en) | 2020-09-25 | 2020-09-25 | Two-stage air cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212106446U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112959413A (en) * | 2021-02-03 | 2021-06-15 | 东莞市朗明精密机械科技有限公司 | Manipulator for PCB drilling machine |
-
2020
- 2020-09-25 CN CN202022128026.8U patent/CN212106446U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112959413A (en) * | 2021-02-03 | 2021-06-15 | 东莞市朗明精密机械科技有限公司 | Manipulator for PCB drilling machine |
| CN112959413B (en) * | 2021-02-03 | 2021-11-02 | 东莞市朗明精密机械科技有限公司 | Manipulator for PCB drilling machine |
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