CN203906439U - Single-action tension cylinder - Google Patents
Single-action tension cylinder Download PDFInfo
- Publication number
- CN203906439U CN203906439U CN201420311156.7U CN201420311156U CN203906439U CN 203906439 U CN203906439 U CN 203906439U CN 201420311156 U CN201420311156 U CN 201420311156U CN 203906439 U CN203906439 U CN 203906439U
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- China
- Prior art keywords
- piston rod
- cylinder
- pulling force
- traveller
- rear end
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Abstract
The utility model discloses a single-action tension cylinder. The single-action tension cylinder comprises a cylinder body, a front end cover, a rear end cover, a piston rod and a sliding column arranged in the cylinder body. The rear end of the sliding column is fixedly connected to the rear end cover. The piston rod is provided with an inner hole. The front end of the sliding column is arranged in the inner hole in a sliding and penetrating mode relative to the piston rod. A closed space is formed between the front end of the sliding column and the inner hole, and a reset spring used for providing the reset force of the piston rod is arranged in the closed space. The single-action tension cylinder can be used for a single-action hydraulic cylinder or a single-action pneumatic cylinder and is simple in structure, small in axial dimension, good in assembly manufacturability, low in manufacturing cost and high in mechanical efficiency.
Description
Technical field
the utility model relates to a kind of single-acting pulling force cylinder.
Background technique
single-action hydraulic cylinder and cylinder, it is with respect to double-acting oil hydraulic cylinder and cylinder, simple in structure, and cost is lower, and reason is the pipeline that single-action hydraulic cylinder or cylinder only need a turnover liquid or gas, and double-acting hydraulic cylinder and cylinder need two.In addition, between the front cover of double-acting hydraulic cylinder and cylinder and cylinder barrel, need to arrange static seal device, between piston rod and internal hole of front end cover, need to arrange dynamic seal apparatus.In addition, at general single-action hydraulic cylinder and cylinder, be all thrust type, oil hydraulic cylinder and the cylinder of output pulling force are extremely rare.
the most outstanding shortcoming of traditional single-action hydraulic cylinder and cylinder is, because Returnning spring generally will take the axial space of 1/3rd left and right, causes the axial dimension of cylinder barrel to strengthen, and not only wastes material, and significantly increased cost.
to sum up, create the not single-acting pulling force cylinder of axial occupation space of a kind of Returnning spring, cost for the hydraulic and pneumatic transmission system of industrial extensive application has positive effect, due to significantly the dwindling of axial dimension, can greatly improve the space layout of system simultaneously.
Summary of the invention
the purpose of this utility model is to provide the not single-acting pulling force cylinder of axial occupation space of a kind of Returnning spring, thereby can dwindle axial dimension, reduces manufacture cost.
for achieving the above object, the technical solution adopted in the utility model is: a kind of single-acting pulling force cylinder, comprise cylinder body, front cover, rear end cover and piston rod, described pulling force cylinder also comprises the traveller of being located in described cylinder body, the rear end of described traveller is fixedly attached on described rear end cover, on described piston rod, offer endoporus, the front end of described traveller can be located in described endoporus by relatively described piston rod slidably, between the front end of described traveller and described endoporus, form an enclosed space, in described enclosed space, be provided with for the Returnning spring of described piston rod reposition force is provided.
preferably, the described endoporus of described piston rod is through hole, the front end of the described piston rod strong output element that is permanently connected, and described Returnning spring is between described power output element and described traveller.
preferably, described Returnning spring is butterfly spring.
utilization due to technique scheme, the utility model compared with prior art has following advantages: single-acting pulling force cylinder of the present utility model, can be used for single-action hydraulic cylinder or single-acting pneumatic cylinder, wherein owing to Returnning spring being placed in to the endoporus of piston rod, do not need to take the axial space of oil hydraulic cylinder or pneumatic cylinder, thereby greatly dwindled the axial dimension of cylinder body, reduced significantly manufacture cost.In addition, Returnning spring can adopt butterfly spring, the helical spring that its rigidity is more general has larger range of choice, and due to its nonlinear characteristics, within the reposition force of spring can be controlled at less scope, the diameter of cylinder body has had significantly and has reduced compared to existing technology, has also effectively improved the mechanical efficiency of this single-acting thrust cylinder simultaneously, makes it have good energy saving.
Accompanying drawing explanation
accompanying drawing 1 is the internal structure schematic diagram one of single-acting pulling force cylinder of the present utility model;
accompanying drawing 2 is the internal structure schematic diagram two of single-acting pulling force cylinder of the present utility model;
accompanying drawing 3 is the internal structure schematic diagram three of single-acting pulling force cylinder of the present utility model.
wherein: 1, cylinder body; 2, front cover; 21, inlet hole/oil hole; 3, rear end cover; 31, spiracle; 4, piston rod; 41, endoporus; 5, traveller; 6, Returnning spring (butterfly spring); 7, power output element; 8, selector valve.
Embodiment
below in conjunction with accompanying drawing and specific embodiment, the technical solution of the utility model is further elaborated.
single-acting pulling force cylinder shown in Figure 1, comprise cylinder body 1, be located at cylinder body 1 front portion front cover 2, be located at cylinder body 1 rear portion rear end cover 3, be located at the piston rod 4 that can move along fore-and-aft direction in cylinder body 1, the front end of piston rod 4 passes outside front cover 2 herein.
above and in the following definition about direction, be all that the direction of piston rod 4 motions during with pulling force cylinder working defines, the piston rod 4 relatively outside direction moving of cylinder body 1 is front, otherwise after being, that is the left and right directions in Fig. 1 to Fig. 3, after wherein left is, right-hand is front.
on piston rod 4, offer endoporus 41, the closed front setting of this endoporus 41.Here, endoporus 41 is set to through hole, and the front end of piston rod 4 is fixedly provided with power output element 7, and this power output element 7 is by the closed front of endoporus 41.
this pulling force cylinder also comprises the traveller 5 of being located in cylinder body 1, and the rear end of this traveller 5 is fixedly attached on rear end cover 3, and the front portion of traveller 5 relatively piston rod 4 is located in endoporus 41 slidably.In endoporus 41, between the front end of traveller 5 and the rear end of power output element 7, form an enclosed space, in this enclosed space, be provided with for the Returnning spring 6 of piston rod 4 restoring forces is provided.This Returnning spring 6 can adopt butterfly spring, and keep out respectively on the front end of traveller 5 on the rear end with power output element 7 at the two ends of butterfly spring.
in the present embodiment, front cover 2 is tightly connected with cylinder body 1, the chamber of the front portion of cylinder body 1 between piston rod 4 and front cover 2 forms airtight pressure chamber, by the inlet hole/oil hole 21 being opened on front cover 2, can in above-mentioned pressure chamber, be filled with pressurized gas or injection liquid force feed, piston rod 4 motions.
shown in Figure 1, under original state, under the effect of Returnning spring 6, piston rod 4 is positioned at the front portion of cylinder body 1, when pressurized gas/hydraulic oil is by after being opened in inlet hole/oil hole 21 on front cover 2 and entering in pressure chamber, piston rod 4 overcomes the effect of Returnning spring 6 and moves backward, this pulling force cylinder output thrust backward, now Returnning spring 6 is compressed and be limited between traveller 5 and power output element 7, as shown in Figure 2 gradually.
when piston rod 4 travels forward after end, the pressurized gas in pressure chamber passes into atmosphere gradually or hydraulic oil is back to fuel tank, and under the thrust of Returnning spring 6, promote piston rod 4 and move forward, as shown in Figure 3, this pulling force cylinder output pulling force forward.Until Returnning spring 6 returns back to original state, piston rod 4 completes reset.Said process can be realized by the switch operation of solenoid directional control valve 8.
shown in each accompanying drawing, on rear end cover 3, also offer spiracle 31, so that piston rod 4 is connected with outside with the space between rear end cover 3, can guarantee so the smooth movement of piston rod 4, avoid in above-mentioned space the air pressure that forms to move forward and backward formation resistance to piston rod 4.Simultaneously, on traveller 5, offer the through hole axially running through along it, the rear portion of traveller 5 has opening, this opening makes above-mentioned through hole and spiracle 31 phase airflow connections, and the pressure in the enclosed space of avoiding forming between traveller 5 front ends and power output element 7 rear ends moves forward and backward generation resistance to piston rod 4.
in this single-acting pulling force cylinder, Returnning spring 6 does not need to take the axial space of cylinder or oil hydraulic cylinder, thereby has greatly dwindled the axial dimension of cylinder barrel, saves material, has significantly lowered manufacture cost, can greatly improve the space layout of this pulling force cylinder.Meanwhile, this pulling force cylinder simple in structure, manufacture and assembly process process good.
in the present embodiment, Returnning spring 6 adopts butterfly spring, because its mechanical characteristic is nonlinear, when selecting, can choose rational mechanical characteristic according to the operating mode of practical application interval, like this can so that the reposition force excursion of spring significantly dwindle, the mechanical efficiency that can effectively improve this single-acting pulling force cylinder, is conducive to energy-conservation.And traditional helical spring is because its mechanical characteristics is linear, its rigidity is directly proportional to its amount of deformation, while causing amount of deformation larger, it is large that its reposition force significantly becomes, because need to consuming piston, this reposition force additionally provide active force to overcome, certainly will, by under the certain condition of system pressure, cause cylinder diameter to expand.The utility model has solved this technical barrier well, and the diameter of cylinder body 1 has had significantly and reduced compared to existing technology.
in addition, butterfly spring can adopt the form of lamination to improve rigidity, and this makes the pulling force of single-acting pulling force cylinder output of the present utility model have larger regulation range, makes it have better versatility.
above-described embodiment is only explanation technical conceive of the present utility model and feature, and its object is to allow person skilled in the art can understand content of the present utility model and implement according to this, can not limit protection domain of the present utility model with this.All equivalences of doing according to the utility model Spirit Essence change or modify, within all should being encompassed in protection domain of the present utility model.
Claims (3)
1. a single-acting pulling force cylinder, comprise cylinder body, front cover, rear end cover and piston rod, it is characterized in that: described pulling force cylinder also comprises the traveller of being located in described cylinder body, the rear end of described traveller is fixedly attached on described rear end cover, on described piston rod, offer endoporus, the front end of described traveller can be located in described endoporus by relatively described piston rod slidably, between the front end of described traveller and described endoporus, form an enclosed space, in described enclosed space, be provided with for the Returnning spring of described piston rod reposition force is provided.
2. single-acting pulling force cylinder according to claim 1, is characterized in that: the described endoporus of described piston rod is through hole, the front end of the described piston rod strong output element that is permanently connected, and described Returnning spring is between described power output element and described traveller.
3. single-acting pulling force cylinder according to claim 1, is characterized in that: described Returnning spring is butterfly spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420311156.7U CN203906439U (en) | 2014-06-12 | 2014-06-12 | Single-action tension cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420311156.7U CN203906439U (en) | 2014-06-12 | 2014-06-12 | Single-action tension cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203906439U true CN203906439U (en) | 2014-10-29 |
Family
ID=51780722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420311156.7U Expired - Fee Related CN203906439U (en) | 2014-06-12 | 2014-06-12 | Single-action tension cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203906439U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006024A (en) * | 2014-06-12 | 2014-08-27 | 苏州劳灵精密机械有限公司 | Single-action tension cylinder |
-
2014
- 2014-06-12 CN CN201420311156.7U patent/CN203906439U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104006024A (en) * | 2014-06-12 | 2014-08-27 | 苏州劳灵精密机械有限公司 | Single-action tension 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: 20141029 Termination date: 20170612 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |