CN204572619U - A kind of multi-stage expansion cylinder - Google Patents
A kind of multi-stage expansion cylinder Download PDFInfo
- Publication number
- CN204572619U CN204572619U CN201520086855.0U CN201520086855U CN204572619U CN 204572619 U CN204572619 U CN 204572619U CN 201520086855 U CN201520086855 U CN 201520086855U CN 204572619 U CN204572619 U CN 204572619U
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- level
- inner casing
- cylinder body
- air flue
- piston head
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Abstract
The utility model relates to plunger telescopic cylinder technical field, particularly a kind of multi-stage expansion cylinder, comprises one-level cylinder body and secondary cylinder body, it is characterized in that: described secondary cylinder body is installed in described one-level cylinder body; Described one-level cylinder body comprises front cover, rear end cover, one-level outer shell and one-level inner casing; One-level annular chamber is provided with between the inwall of described one-level outer shell and the outer wall of described one-level inner casing; Described secondary cylinder body comprises dust cover, large piston head, small piston head, piston rod, secondary outer shell and secondary inner casing; Secondary ring cavity is provided with between the inwall of described secondary outer shell and the outer wall of described secondary inner casing; Described large piston head is sheathed in described one-level inner casing; Described secondary outer cylinder sheath is provided with in the through hole of the central part of described front cover, the utility model is by being installed in described one-level cylinder body by described secondary cylinder body, substantially reduce the volume of telescopic cylinder, have the advantage that the F.F. under constant voltage gas source condition is contracted soon simultaneously concurrently.
Description
Technical field
The utility model relates to plunger telescopic cylinder technical field, particularly a kind of multi-stage expansion cylinder.
Background technique
Telescopic cylinder is used for the operating conditions needing the lifting providing larger row journey, but the volume ratio of traditional telescopic cylinder is comparatively large, and the length particularly in telescopic direction is comparatively large, is therefore difficult to be applied in the compact engineering machinery of some structural designs; And traditional telescopic cylinder constant pressure gas pressure source lower piston rod stretch out constant airspeed, slow with the speed that ejects of this cylinder, do not possess the feature of F.F., fast contracting.
Model utility content
The purpose of this utility model is for the deficiencies in the prior art, provides that volume is little, the multi-stage expansion cylinder of fast response time.
For solving the problem, the utility model provides following technological scheme:
A kind of multi-stage expansion cylinder, comprises one-level cylinder body and secondary cylinder body; Described one-level cylinder body comprises front cover, rear end cover, one-level outer shell and one-level inner casing; One-level ring cavity is provided with between the inwall of described one-level outer shell and the outer wall of described one-level inner casing; Described secondary cylinder body comprises dust cover, large piston head, small piston head, piston rod, secondary outer shell and secondary inner casing; Secondary ring cavity is provided with between the inwall of described secondary outer shell and the outer wall of described secondary inner casing; Described large piston head is sheathed in described one-level inner casing; Described secondary outer cylinder sheath is provided with in the through hole of the central part of described front cover.
Further, described rear end cover offers the first inlet hole and counterbore; The first described inlet hole is communicated with by the inner space of described counterbore with described one-level cylinder body inner casing.
Further, the second inlet hole, the first air flue, the second air flue and the 3rd air flue on described front cover; The second described inlet hole is communicated with described one-level ring cavity by the first described air flue; One end of the second described air flue is communicated with described one-level ring cavity through the sidewall of described one-level inner casing, and the sidewall that the other end of the second described air flue passes described secondary outer shell is communicated with described secondary ring cavity; The middle part of the second described air flue is communicated with the inner space of described one-level inner casing by the 3rd described air flue.
Further, the central part of described large piston head offers the shoulder hole be communicated with described secondary inner casing by described one-level inner casing; Described large piston head is provided with round ring boss, and the position of described round ring boss is corresponding with the position of the 3rd described air flue; The width of described round ring boss is greater than the width of the 3rd described air flue.
Further, described piston rod is connected with described small piston head thread; Described piston rod is sheathed in described dust cover; Described dust cover offers the 4th air flue be communicated with the inner space of described secondary inner casing by described secondary ring cavity.
Further, described large piston head and small piston head are all provided with wear-resistant strip and seal ring; Dust ring and copper sheathing is provided with between described dust cover and described described bar; Between described front cover and described secondary outer shell, dust ring is installed.
Beneficial effect: the utility model, by being installed in described one-level cylinder body by described secondary cylinder body, substantially reduces the volume of telescopic cylinder, has the advantage that the F.F. under constant voltage gas source condition is contracted soon concurrently simultaneously.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present utility model;
Description of reference numerals: rear end cover 1, the first inlet hole 1a, counterbore 1b, front cover 2, the second inlet hole 2a, first air flue 2b, the second air flue 2c, the 3rd air flue 2d, one-level outer shell 3, one-level inner casing 4, dust cover 5, the 4th air flue 5a, large piston head 6, round ring boss 6a, shoulder hole 6b, small piston head 7, piston rod 8, secondary outer shell 9, secondary inner casing 10, one-level ring cavity 11, secondary ring cavity 12, wear-resistant strip 13, seal ring 14, dust ring 15, copper sheathing 16.
Specific embodiment
Below in conjunction with Figure of description and embodiment, specific embodiment of the utility model is described in further detail:
With reference to a kind of multi-stage expansion cylinder shown in Fig. 1, comprise one-level cylinder body and secondary cylinder body; Described secondary cylinder body is installed in described one-level cylinder body; Described one-level cylinder body comprises front cover 2, rear end cover 1, one-level outer shell 3 and one-level inner casing 4; One-level ring cavity 11 is provided with between the inwall of described one-level outer shell 3 and the outer wall of described one-level inner casing 4; Described secondary cylinder body comprises dust cover 5, large piston head 6, small piston head 7, piston rod 8, secondary outer shell 9 and secondary inner casing 10; Secondary ring cavity 12 is provided with between the inwall of described secondary outer shell 9 and the outer wall of described secondary inner casing 10; Described large piston head 6 is sheathed in described one-level inner casing 4; Described secondary outer shell 9 is arranged with in the through hole of the central part of described front cover 2.
Described rear end cover 1 offers the first inlet hole 1a and counterbore 1b; The first described inlet hole 1a is communicated with the inner space of described one-level cylinder body inner casing by described counterbore 1b.
Described front cover 2 offers the second inlet hole 2a, the first air flue 2b, the second air flue 2c and the 3rd air flue 2d; The second described inlet hole 2a is communicated with described one-level ring cavity 11 by the first described air flue 2b; One end of the second described air flue 2c is communicated with described one-level ring cavity 11 through the sidewall of described one-level inner casing 4, and the sidewall that the other end of the second described air flue 2c passes described secondary outer shell 9 is communicated with described secondary ring cavity 12; The middle part of the second described air flue 2c is communicated with the inner space of described one-level inner casing 4 by the 3rd described air flue 2d.
The central part of described large piston head 6 offers the shoulder hole 6b be communicated with described secondary inner casing 10 by described one-level inner casing 4; Described large piston head 6 is provided with round ring boss 6a, and the position of described round ring boss 6a is corresponding with the position of the 3rd described air flue 2d; The width of described round ring boss 6a is greater than the width of the 3rd described air flue 2d.
Described piston rod 8 is threaded with described small piston head 7; Described piston rod 8 is sheathed in described dust cover 5; Described dust cover 5 offers the 4th air flue 5a be communicated with the inner space of described secondary inner casing 10 by described secondary ring cavity 12.
Described large piston head 6 and small piston head 7 are all provided with wear-resistant strip 13 and seal ring 14; Dust ring 15 and copper sheathing 16 is provided with between described dust cover 5 and described described bar; Between described front cover 2 and described secondary outer shell 9, dust ring 15 is installed.
The utility model is when propelling stroke, the first described inlet hole 1a air inlet, the second described inlet hole 2a is vented, pressurized gas enter in described one-level inner casing 4 by the first described inlet hole 1a, stop mobile after described secondary cylinder body being advanced to maximum travel position, in this process, original gas in described one-level inner casing 4 is entered in described one-level ring cavity 11 by the 3rd described air flue 2d and the second described air flue 2c, then is discharged through the second inlet hole 2a by the first described air flue 2b; After this, pressurized gas enter into described secondary inner casing 10 by the shoulder hole 6b on described large piston head 6 and described small piston head 7 are advanced to maximum travel position, in the process, in described secondary lumen, original gas enters in described secondary ring cavity 12 by the 4th described air flue 5a, enter in described one-level ring cavity 11 by described second air flue 2c again, discharge through the second inlet hole 2a eventually through the first described air flue 2b.
The utility model is when retract stroke, the second described inlet hole 2a air inlet, the first described inlet hole 1a is vented, pressurized gas enter in one-level ring cavity 11 by the second described inlet hole 2a along the first described air flue 2b, enter in described secondary ring cavity 12 by the second described air flue 2c again, small piston head 7 described in when entering in secondary inner casing 10 eventually through the 4th described air flue 5a retracts to minimum stroke position and stops mobile, in the process, in described secondary inner casing 10, original gas to enter in one-level in thick stick by the shoulder hole 6b on described large piston head 6, discharge through the first described inlet hole 1a again, after this, pressurized gas are acted on described large piston head 6 by the 3rd described air flue 2d and make described large piston head 6 cause it to move to minimum stroke position and stop motion, in the process, in described one-level inner casing 4, original gas is discharged by the first described inlet hole 1a.
The air pressure of the gas passed in propelling stroke is constant, diameter due to described large piston head 6 is greater than the diameter of described small piston head 7, the active force acted on described large piston head 6 is less than the active force acted on described small piston head 7, therefore, the drive-in step of described piston rod 8 is first slow rear fast; The air pressure of the gas passed in retract stroke is constant, and the retraction process of therefore described piston rod 8 is first quick and back slow.
Described secondary cylinder body is installed in described one-level cylinder body, and the volume of the cylinder body make retraction while meeting the larger row journey in drive-in step after is relatively little, saves space.
The above, it is only preferred embodiment of the present utility model, not any restriction is made to technical scope of the present utility model, therefore every above embodiment is done according to technical spirit of the present utility model any trickle amendment, equivalent variations and modification, all still belong in the scope of the technical solution of the utility model.
Claims (6)
1. a multi-stage expansion cylinder, comprises one-level cylinder body and secondary cylinder body, it is characterized in that: described secondary cylinder body is installed in described one-level cylinder body; Described one-level cylinder body comprises front cover (2), rear end cover (1), one-level outer shell (3) and one-level inner casing (4); One-level ring cavity (11) is provided with between the inwall of described one-level outer shell (3) and the outer wall of described one-level inner casing (4); Described secondary cylinder body comprises dust cover (5), large piston head (6), small piston head (7), piston rod (8), secondary outer shell (9) and secondary inner casing (10); Secondary ring cavity (12) is provided with between the inwall of described secondary outer shell (9) and the outer wall of described secondary inner casing (10); Described large piston head (6) is sheathed in described one-level inner casing (4); Described secondary outer shell (9) is arranged with in the through hole of the central part of described front cover (2).
2. a kind of multi-stage expansion cylinder according to claim 1, is characterized in that: described rear end cover (1) offers the first inlet hole (1a) and counterbore (1b); Described the first inlet hole (1a) is communicated with by the inner space of described counterbore (1b) with described one-level cylinder body inner casing.
3. a kind of multi-stage expansion cylinder according to claim 1, is characterized in that: described front cover (2) offers the second inlet hole (2a), the first air flue (2b), the second air flue (2c) and the 3rd air flue (2d); Described the second inlet hole (2a) is communicated with described one-level ring cavity (11) by described the first air flue (2b); One end of described the second air flue (2c) is communicated with described one-level ring cavity (11) through the sidewall of described one-level inner casing (4), and the sidewall that the other end of described the second air flue (2c) passes described secondary outer shell (9) is communicated with described secondary ring cavity (12); The middle part of described the second air flue (2c) is communicated with the inner space of described one-level inner casing (4) by the 3rd described air flue (2d).
4. a kind of multi-stage expansion cylinder according to claim 3, is characterized in that: the central part of described large piston head (6) offers the shoulder hole (6b) be communicated with described secondary inner casing (10) by described one-level inner casing (4); Described large piston head (6) is provided with round ring boss (6a), and the position of described round ring boss (6a) is corresponding with the position of the 3rd described air flue (2d); The width of described round ring boss (6a) is greater than the width of the 3rd described air flue (2d).
5. a kind of multi-stage expansion cylinder according to claim 1, is characterized in that: described piston rod (8) is threaded with described small piston head (7); Described piston rod (8) is sheathed in described dust cover (5); Described dust cover (5) offers the 4th air flue (5a) be communicated with the inner space of described secondary inner casing (10) by described secondary ring cavity (12).
6. a kind of multi-stage expansion cylinder according to claim 1, is characterized in that: described large piston head (6) and small piston head (7) are all provided with wear-resistant strip (13) and seal ring (14); Dust ring (15) and copper sheathing (16) is provided with between described dust cover (5) and described described bar; Between described front cover (2) and described secondary outer shell (9), dust ring (15) is installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520086855.0U CN204572619U (en) | 2015-02-06 | 2015-02-06 | A kind of multi-stage expansion cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520086855.0U CN204572619U (en) | 2015-02-06 | 2015-02-06 | A kind of multi-stage expansion cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204572619U true CN204572619U (en) | 2015-08-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520086855.0U Expired - Fee Related CN204572619U (en) | 2015-02-06 | 2015-02-06 | A kind of multi-stage expansion cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204572619U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110179286A (en) * | 2019-07-07 | 2019-08-30 | 赵大兵 | A kind of adjustable lumbar pad of support curved surface |
| CN112211877A (en) * | 2020-09-29 | 2021-01-12 | 燕山大学 | Multistage sleeve type double-acting sequential telescopic hydraulic cylinder |
| CN113653703A (en) * | 2021-07-05 | 2021-11-16 | 顾忙忙 | Multistage hydraulic cylinder |
-
2015
- 2015-02-06 CN CN201520086855.0U patent/CN204572619U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110179286A (en) * | 2019-07-07 | 2019-08-30 | 赵大兵 | A kind of adjustable lumbar pad of support curved surface |
| CN112211877A (en) * | 2020-09-29 | 2021-01-12 | 燕山大学 | Multistage sleeve type double-acting sequential telescopic hydraulic cylinder |
| CN112211877B (en) * | 2020-09-29 | 2022-04-01 | 燕山大学 | Multistage sleeve type double-acting sequential telescopic hydraulic cylinder |
| CN113653703A (en) * | 2021-07-05 | 2021-11-16 | 顾忙忙 | Multistage hydraulic cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20160206 |
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| CF01 | Termination of patent right due to non-payment of annual fee |