CN107630855A - A kind of double-piston cylinder - Google Patents
A kind of double-piston cylinder Download PDFInfo
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- CN107630855A CN107630855A CN201711005907.7A CN201711005907A CN107630855A CN 107630855 A CN107630855 A CN 107630855A CN 201711005907 A CN201711005907 A CN 201711005907A CN 107630855 A CN107630855 A CN 107630855A
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Abstract
The invention discloses a kind of double-piston cylinder for possessing precompressed effect, including cylinder bottom 5, cylinder sleeve 3, cylinder sleeve extension 4, center piston 6 and annular piston 9, center piston 6 and the coaxial placement of annular piston 9, there is dynamic sealing between center piston 6 and the inwall of ring-type cylinder sleeve 3, there is dynamic sealing between the piston rod 7 and annular piston 9 of ring center piston 6, annular piston 9 is with the inwall of ring-type cylinder sleeve 3 without sealing, annular piston 9 has dynamic sealing with ring-type cylinder sleeve extension 4, hydraulic fluid port 1 is provided with ring-type cylinder sleeve 3, connect the chamber A in cylinder sleeve 3, hydraulic fluid port 2 is provided with ring-type cylinder sleeve 3 again, connect the chamber B in cylinder sleeve 3, isolated between annular chamber A and annular chamber B by the dynamic sealing of ring center piston 6.It is provided with pin 8 on ring center piston 6, is provided with notch 10 on ring-type annular piston 9, ring-type pin 8 limits ring-type center piston 6 and the relative distance of ring-type annular piston 9 with annular notch 10 can not be more than setting value.Advantage is flexible function, compact-sized, and small volume is in light weight.
Description
Technical field
The invention belongs to technical field of mechanical manufacturing equipment, is related to a kind of double-piston cylinder for possessing precompressed effect, especially
Ground, it is quite suitable for riveting, crimps, assembles the power drive of equipment.
Background technology
When sheet material rivets, it is necessary in advance by plate compact, sheet material displacement otherwise very likely occurs, cause riveting failure or
Defect.During to sheet material pre-pressing, if low using other split type pressing device, system complex, efficiency.If driving
Spring is set in lever, pre-pressing is carried out using the elastic force of spring, then the elastic force of spring is difficult to as needed adjustment in real time, from
Dynamicization degree is low.When being riveted to large-scale workpiece, it is necessary to which riveting nose is worked on the mechanical arm of robot, and it is above-mentioned existing
Some precompressed clamping methods will dramatically increase extra volume and weight, can not meet the fertile demand of modern intelligence.
In view of the drawbacks described above of prior art, the design people are actively subject to research and innovation, devise and a kind of new possess
The double-piston cylinder of precompressed effect, solves and compresses sheet material technical barrier.
The disclosure of background above technology is only used for understanding design and the technical scheme of the present invention, not necessarily belongs to this patent
The prior art of application, the prior art of present patent application also could not necessarily be implemented on the basis of background above, while not have
There is tangible proof to show the above in the case of the applying date of present patent application is disclosed, above-mentioned background technology should not
For evaluating the novelty and creativeness of the application.
The content of the invention
The defects of existing for prior art and deficiency, the invention discloses a kind of double-piston oil for possessing precompressed effect
Cylinder, as shown in figure 1, including cylinder bottom 5, cylinder sleeve 3, cylinder sleeve extension 4, center piston 6 and annular piston 9, center piston 6 and ring-type
The coaxial placement of piston 9, there are dynamic sealing, the piston rod 7 and ring of ring center piston 6 between center piston 6 and the inwall of ring-type cylinder sleeve 3
There is dynamic sealing between shape piston 9, annular piston 9 is with the inwall of ring-type cylinder sleeve 3 without sealing, annular piston 9 and ring-type cylinder sleeve extension 4
There is dynamic sealing, hydraulic fluid port 1 be provided with ring-type cylinder sleeve 3, connect the chamber A in cylinder sleeve 3, hydraulic fluid port 2 is provided with again on ring-type cylinder sleeve 3,
The chamber B in cylinder sleeve 3 is connected, is isolated between annular chamber A and annular chamber B by the dynamic sealing of ring center piston 6.Ring center
It is provided with pin 8 on piston 6, is provided with notch 10 on ring-type annular piston 9, ring-type pin 8 is limited in ring-type with annular notch 10
Plug 6 of being indecisive and changeable can not be more than setting value with the relative distance of ring-type annular piston 9.
One end connection piston 6 of piston rod 7, the other end stretch out from the side of cylinder sleeve extension 4, and one end of annular piston 9 exists
Moved in chamber B, the other end stretches out from the side of cylinder sleeve extension 4.
Fluid pressure in chamber A is Pa, and the pressure in chamber B is Pb, and Pa, Pb are individually controllable.Fluid pair in chamber A
The useful effect face of fluid in the area S6 of piston 6 centered on the effective active area of piston rod, chamber B to center piston 6
The area S6 of piston 6 subtracts the effective area S7 of piston rod centered on product, and chamber B is to the effective active area of annular piston 9
S9, it is designed as S6>S7, S6>S9,（S6-S7）> S9.
Hydraulic action F6=Pa × S6-Pb in center piston 6 ×（S6-S7）, the hydraulic action of annular piston 9
Power F9=Pb × S9.
Thimble 11 is provided with the piston rod 7 of center piston 6, blank holder 12 is provided with annular piston 9.In blank holder 12
Portion, the front end of thimble 11 are provided with the rivet 13 needed for riveting sheet material 14.
Any one uses press-in connection, combination or the assembling device of double-piston cylinder disclosed in this invention.
Brief description of the drawings
Fig. 1 original states
Fig. 2 piston B impaction states
Fig. 3 piston A working conditions
Fig. 4 piston A returns states
Fig. 5 piston B returns states
Detailed description of main elements：Hydraulic fluid port 1, hydraulic fluid port 2, cylinder sleeve 3, cylinder sleeve extension 4, cylinder bottom 5, center piston 6, center piston bar 7, pin
8, annular piston 9, notch 10, thimble 11, blank holder 12, rivet 13, sheet material 14.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below
Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
If the fluid pressure in chamber A is Pa, the pressure in chamber B is Pb.Fluid in chamber A is to the effective of piston rod
Fluid in the area S6 of piston 6 centered on active area, chamber B is to piston 6 centered on the effective active area of center piston 6
Area S6 subtract center piston 6 piston rod 7 effective area S7, chamber B is to the effective active area of annular piston 9
S9。
The direction for defining power is timing, and direction is towards the side of sheet material 14；Force direction for it is negative when, direction is towards cylinder bottom 5 one
Side.
Therefore the hydraulic action F6 in center piston is
F6 = Pa×S6 - Pb×（S6-S7）
The hydraulic action F9 of annular piston 9 is
F9 = Pb×S9
It is designed as S6>S7, S6>S9,（S6-S7）>S9, Pa, Pb are individually controllable.Under this design, can arbitrarily control F6 and
F9 size and Orientation, realize the function of compressing sheet material 14 and be pressed into rivet 13.It is specifically described below.
【1】Original state：
The machine of original state as shown in Figure 1, now Pa=0, Pb=0, center piston 6 and annular piston 9 all in the side of cylinder bottom 5
Tool extreme position, rivet 13 are positioned in the front end of 13 inside thimble of blank holder 11.
【2】Load pressure Pa=0, Pb>0, now center piston 6 and annular piston 9 be all without being subjected to displacement, because：
Pressure Pb is applied to chamber B by hydraulic fluid port 2, and keeps Pa=0, then the hydraulic action in center piston 6
F6 = Pa×S6 - Pb×（S6-S7）= - Pb×（S6-S7）< 0
Power is to the side of cylinder bottom 5.
Hydraulic action on annular piston 9
F9 = Pb×S9
The direction of power is towards the side of sheet material 14.
Therefore, chamber B has the trend of increase, and center piston 6 and the distance of annular piston 9 have increased trend.It is indecisive and changeable in but
Be provided with pin 8 on plug 6, it is spacing with the notch 10 on annular piston 9, in make to be indecisive and changeable plug 6 and the distance of annular piston 9 is relatively fixed,
Both make a concerted effort should be investigated.
Due to（S6-S7）>S9, so making a concerted effort in center piston 6 and annular piston 9
F = F6 + F9 = - Pb×（S6-S7）+ Pb×S9 < 0
Direction is towards the side of cylinder bottom 5, but center piston 6 is stopped by cylinder bottom 5, therefore actually center piston 6 and annular piston 9 be not
It can be subjected to displacement.
【3】Apply pressure Pa>0, Pb>0, and Pa is much larger than Pb（Pa>>Pb）, now center piston 6 and annular piston 9 be all
Moved simultaneously to sheet material side, until blank holder 12 arrives at sheet material 14：
Pressure Pb is applied to chamber B by hydraulic fluid port 2, pressure Pa is applied to chamber A by hydraulic fluid port 1, and keep Pa>>Pb>0, then in
The hydraulic action being indecisive and changeable on plug 6
F6 = Pa×S6 - Pb×（S6-S7）>> 0
Hydraulic action in center piston 6 is towards the direction of sheet material 14, therefore center piston has becoming towards the motion of the direction of sheet material 14
Gesture.
Hydraulic action on annular piston 9
F9 = Pb×S9 > 0
Hydraulic action on annular piston 9 is towards the direction of sheet material 14, the motion of lower surface analysis annular piston.
Now, annular piston 9 is by the net liquid pressure towards the direction of sheet material 14, and blank holder 12 is not by sheet material
Stop, therefore chamber B has the trend of increase, and center piston 6 and the distance of annular piston 9 have during increased trend, annular piston 9 compares
It is indecisive and changeable and fills in the trend that 6 oriented strip velocities faster move.But due to being provided with pin 8 in center piston 6, and on annular piston 9
Notch 10 it is spacing, center piston 6 and the distance of annular piston 9 are relatively fixed, it should investigate both make a concerted effort.Due to Pa>>Pb>
0,（S6-S7）>Both S9 make a concerted effort
F6 = F6 + F9 = Pa×S6 - Pb×（S6-S7）+ Pb×S9 = >> 0
Zero can be much larger than, the direction made a concerted effort is towards the direction of sheet material 14, therefore center piston 6 and annular piston 9 can be together towards sheet materials
14 direction movement, until reaching the state that blank holder 12 as shown in Figure 2 contacts with sheet material 14.
【4】Sheet material is compressed to rivet with completing：
Stop motion after blank holder 12 contacts with sheet material 14, afterwards blank holder 12 give 14 1 thrusts of sheet material
F9 = Pb×S9
Now, due to Pa>>Pb>0, the hydraulic action in center piston 6
F6 = Pa×S6 - Pb×（S6-S7）>> 0
Hydraulic action in center piston 6 is towards sheet material direction.Therefore, center piston 6 continues towards the motion of sheet material direction, directly
To keeping this power that rivet is pressed into sheet material, riveting is completed, reaches state as shown in Figure 3.
In riveting process, blank holder 12 remains to the thrust F9 of sheet material
F9 = Pb×S9
In riveting process, the size of adjustment Pb in real time can be needed, to adjust pressure of the blank holder 12 to rivet sheet material 14.
Pa, Pb size can be adjusted in real time as needed, to adjust pressure of the center piston 6 to rivet 13, very flexibly.
【5】Center piston 6 under impaction state is kept to retract：
After the completion of riveting, chamber A pressure Pa=0 is set, keeps Pb>0.Now, the hydraulic action in center piston 6
F6 = - Pb×（S6-S7）< 0
Hydraulic action in center piston 6 is towards the side of cylinder bottom 5, therefore center piston is retracted towards towards the side of cylinder bottom 5.
Now, the thrust of blank holder 12, i.e. hydraulic action suffered by annular piston 9
F9 = Pb×S9 > 0
Towards sheet material direction, therefore keep compressing.Thrust can also be adjusted by adjusting Pb in real time.
In fact, Pa can also be adjusted simultaneously, Pb configures to obtain more flexible power.As long as
F6 = Pa×S6 - Pb×（S6-S7）< 0
It can ensure that center piston 6 is retracted towards cylinder bottom 5.
Center piston 6 is retracted when reaching state as shown in Figure 4, into step【6】.
【6】Center piston 6 is retracted together with annular piston 9：
Center piston 6 is retracted, when reaching state as shown in Figure 4, the pin 8 in center piston 6, and on annular piston 9
Mechanical position limitation occurs again for notch 10, and both distances can not continue to increase, and center piston 6 can not be further continued for voluntarily to the side of cylinder bottom 5
Motion.Due to Pa=0,（S6-S7）>Both S9, center piston 6 and annular piston 9 are suffered to make a concerted effort
F = F6 + F9 = - Pb×（S6-S7）+ Pb×S9 < 0
Resultant direction is towards the side of cylinder bottom 5, therefore center piston 6 remains relatively unchanged over the position of annular piston 9, together towards cylinder bottom
5 one lateral movements, until reaching cylinder bottom 5 and being blocked, stop motion together.
Then, chamber A pressure Pa=0, chamber A pressure Pb=0 are set.Now, in addition to rivet is pressed into sheet material, in
It is indecisive and changeable plug 6 and annular piston 9 has been returned to the mechanical limit position of the side of cylinder bottom 5, i.e. step【1】Representative original state.
From step【1】To step【7】, the double-piston cylinder using precompressed disclosed by the invention effect is completely elaborated, it is real
Now once complete plate compact, riveting, unclamp process.And by adjusting Pa and Pb, riveting can be arbitrarily adjusted in real time
Relay and thrust, very flexibly.By setting displacement transducer, cylinder sleeve 3, center piston 6, the phase of annular piston 9 are measured
To position, it is possible to achieve more fully for the compress control method of relative displacement between three.
Double-piston cylinder disclosed by the invention with precompressed effect, it is possible to achieve it is flexible to compress, rivet function, and tie
Structure is compact, small volume, in light weight, either artificial to use, or combines robot arm application, and beneficial effect is very bright
It is aobvious.
It the above is only the preferred embodiment of the present invention, be not intended to limit the invention, it is noted that led for this technology
For the those of ordinary skill in domain, without departing from the technical principles of the invention, some improvement and modification can also be made,
These improvement and modification also should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of double-piston cylinder, including cylinder bottom 5, cylinder sleeve 3, cylinder sleeve extension 4, center piston 6 and annular piston 9, in described
It is indecisive and changeable and fills in 6 and the coaxial placement of the annular piston 9, has dynamic sealing between the center piston 6 and the inwall of the cylinder sleeve 3, it is described
Have dynamic sealing between the piston rod 7 and the annular piston 9 of center piston 6, the annular piston 9 and the inwall of cylinder sleeve 3 without
Sealing, the annular piston 9 have dynamic sealing with the cylinder sleeve extension 4, and hydraulic fluid port 1 is provided with the cylinder sleeve 3, connect cylinder sleeve 3
Interior chamber A, hydraulic fluid port 2 is provided with the cylinder sleeve 3 again, connect chamber B, the chamber A and the chamber B in cylinder sleeve 3 it
Between isolated by the dynamic sealing of center piston 6, be provided with pin 8 in the center piston 6, being provided with the annular piston 9
Notch 10, the pin 8 and the notch 10, which limit the center piston 6 and can not be more than with the relative distance of annular piston 9, to be set
Definite value.
2. one end connection piston 6 of piston rod 7 as claimed in claim 1, the other end stretch out from the side of cylinder sleeve extension 4,
One end of annular piston 9 is moved in chamber B, and the other end stretches out from the side of cylinder sleeve extension 4.
3. the fluid pressure in chamber A as claimed in claim 1 is Pa, the pressure in chamber B is Pb, and Pa, Pb independently may be used
Control.
4. fluid in chamber A as claimed in claim 1 is to the area of piston 6 centered on the effective active area of piston rod
Fluid in S6, chamber B subtracts the effective of piston rod to the area S6 of piston 6 centered on the effective active area of center piston 6
Area S7, chamber B are S9 to the effective active area of annular piston 9, are designed as S6>S7, S6>S9,（S6-S7）> S9.
5. hydraulic action F6=Pa × S6-Pb in center piston 6 as claimed in claim 1 ×（S6-S7）, ring
Hydraulic action F9=Pb × S9 of shape piston 9.
6. being provided with thimble 11 on the piston rod 7 of center piston 6 as claimed in claim 1, pressure is provided with annular piston 9
Flange 12, inside blank holder 12, the front end of thimble 11 be provided with rivet 13 needed for riveting sheet material 14.
7. a kind of press-in connection, combination or assembling device, it is characterised in that use the double-piston oil as described in claim 1-5
Cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711005907.7A CN107630855A (en) | 2017-10-25 | 2017-10-25 | A kind of double-piston cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711005907.7A CN107630855A (en) | 2017-10-25 | 2017-10-25 | A kind of double-piston cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107630855A true CN107630855A (en) | 2018-01-26 |
Family
ID=61106269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711005907.7A Withdrawn CN107630855A (en) | 2017-10-25 | 2017-10-25 | A kind of double-piston cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107630855A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107639200A (en) * | 2017-10-25 | 2018-01-30 | 苏州卓尹特机电科技有限公司 | One kind flies nail self-piercing riveting device |
| CN112024602A (en) * | 2020-08-14 | 2020-12-04 | 湖南科美达重工有限公司 | Double-stroke expansion and contraction oil cylinder |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060065699A1 (en) * | 2004-09-24 | 2006-03-30 | Lang Hans J | Joining method and a device for operating a fastening tool |
| CN207879750U (en) * | 2017-10-25 | 2018-09-18 | 苏州卓尹特机电科技有限公司 | A kind of double-piston cylinder can be used for riveting machine |
-
2017
- 2017-10-25 CN CN201711005907.7A patent/CN107630855A/en not_active Withdrawn
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060065699A1 (en) * | 2004-09-24 | 2006-03-30 | Lang Hans J | Joining method and a device for operating a fastening tool |
| CN207879750U (en) * | 2017-10-25 | 2018-09-18 | 苏州卓尹特机电科技有限公司 | A kind of double-piston cylinder can be used for riveting machine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107639200A (en) * | 2017-10-25 | 2018-01-30 | 苏州卓尹特机电科技有限公司 | One kind flies nail self-piercing riveting device |
| CN112024602A (en) * | 2020-08-14 | 2020-12-04 | 湖南科美达重工有限公司 | Double-stroke expansion and contraction oil cylinder |
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| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: Room 311, No. 2, Yangcheng Lake International Science and Technology Park, No. 116, Chengyang Road, Xiangcheng District, Xiangcheng District, Jiangsu Applicant after: Suzhou suci Intelligent Technology Co.,Ltd. Address before: Room 311, No. 2, Yangcheng Lake International Science and Technology Park, No. 116, Chengyang Road, Xiangcheng District, Xiangcheng District, Jiangsu Applicant before: SUZHOU ZHUOYITE ELECTROMECHANICAL TECHNOLOGY CO.,LTD. |
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Address after: G4-701, Artificial Intelligence Industrial Park, No. 88 Jinji Lake Avenue, Suzhou Industrial Park, Suzhou Area, China (Jiangsu) Pilot Free Trade Zone, Suzhou City, Jiangsu Province 215127 Applicant after: Suzhou suci Intelligent Technology Co.,Ltd. Address before: Room 311, Building 2, Yangchenghu International Science and Technology Pioneering Park, 116 Chengyang Road, Xiangcheng District, Suzhou City, Jiangsu Province Applicant before: Suzhou suci Intelligent Technology Co.,Ltd. |
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| WW01 | Invention patent application withdrawn after publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180126 |