CN202012526U - Bi-rod hydraulic cylinder with three stations and double actions - Google Patents
Bi-rod hydraulic cylinder with three stations and double actions Download PDFInfo
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- CN202012526U CN202012526U CN2011200554432U CN201120055443U CN202012526U CN 202012526 U CN202012526 U CN 202012526U CN 2011200554432 U CN2011200554432 U CN 2011200554432U CN 201120055443 U CN201120055443 U CN 201120055443U CN 202012526 U CN202012526 U CN 202012526U
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- hydraulic cylinder
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Abstract
The utility model provides a bi-rod hydraulic cylinder with three stations and double actions, comprising a lower end cover, a cylinder body, a lower big piston, a piston rod, an upper big piston and an upper end cover. The lower end cover is fixed to a main shaft gearbox, and the lower and upper end covers are respectively connected to the cylinder body. The upper and lower large pistons are respectively assembled to the upper and lower cavities of the cylinder body, can move up and down in the cylinder body and respectively sleeve the piston rod. The upper and lower ends of the piston rod respectively penetrate the centers of the upper and the lower end covers and extend outside of the cylinder and can move up and down. When the upper cavity of the hydraulic cylinder is fed with hydraulic oil, the piston rod will move and stop at the lowest end. When the lower cavity of the hydraulic cylinder is fed with hydraulic oil, the piston rod will move and stop at the toppest end. When the upper and lower cavities are simultaneously fed with hydraulic oil, the piston rod will move and stop at a middle position. In this case, the accurate control of three gears can be realized through one hydraulic cylinder. The bi-rod hydraulic cylinder is especially suitable for the gear control of a digital control machine tool.
Description
Technical field
The utility model relates to the technical field of a kind of hydraulic pressure installation, particularly dual-rod hydraulic cylinder.
Background technique
Along with the continuous development of machine-tool industry and hydraulics, hydraulics is increasingly extensive in the application of machine tool field, and especially the application on numerical control machine tool is general especially.Mostly current numerical control machine tool is mechanical, electrical, liquid integrated lathe, and the application of hydraulics is very general.Along with the continuous development of material technology, various brand-new materials are increasingly extensive in the application in the field of manufacturing, especially make the field in aviation, the aluminum alloy that existing material is softer, the higher titanium alloy of hardness is arranged again, and existing emerging composite material has common carbon steel again.
Processing for aluminum alloy material needs higher spindle speed; Need the main shaft of lathe to have the processing characteristics of low-speed big for these difficult to machine materials such as titanium alloy, carbon steels; And for the processing of composite material, rotating speed can not be too high, can not be too low.For adaptability and the machining range that improves numerical control machine tool, just require it must have the ability of high rotating speed processing, have the ability of low-speed big processing again, its speed range must be able to realize that tens forward the variation of commentaries on classics up to ten thousand to.Therefore, such numerical control machine tool must have a cover gear, can realize the ability of High-speed machining and low-speed big processing.
Mostly the gear of traditional machine tool is manually to control a plurality of groups of differences by a plurality of handles, stirs shifting slide gear and realizes what gear changed, thereby realize many transformation of speed outputs.If numerical control machine tool adopts such hand gear mechanism again, just too backward, can't realize automatic control, efficient is low.
It is poor mostly the gear of numerical control machine tool is to dial by oil hydraulic cylinder control, drives shifting slide gear and realize what gear changed automatically.At present, numerical control machine tool with gear has two gears or three gears mostly, we know that common oil hydraulic cylinder only has two stations (the cylinder bar stretches out and two positions of withdrawing fully fully), the common oil hydraulic cylinder of coming round realizes that the accurate control and the location of three positions are impossible, therefore the control of two gears all realizes by an oil hydraulic cylinder, and the control of three gears all cooperatively interacts by two oil hydraulic cylinders and realizes.
As seen, numerical control machine tool with three gears, its gear more complicated that just seems, hydraulic element, pipeline are more, control is got up more loaded down with trivial details, and we know that hydraulic element, pipeline are many more, and its leakage point is just many more, the possibility of leaking is just big more, will certainly cause bigger pollution to working environment like this.
Summary of the invention
The objective of the invention is to realize the accurate control of three stations by one three station oil hydraulic cylinder, hydraulic system is simplified greatly, reduce to be leaked and pollute, but can make both high speed rotating of equipment such as lathe, but low-speed big work again, thereby satisfy different job requirements.
The present invention realizes the scheme of above-mentioned purpose: a kind of three station double-action dual-rod hydraulic cylinders, comprise cylinder body, piston rod, following big piston and last big piston, the inboard wall of cylinder block middle part has annular boss, and cylinder body is divided into epicoele and cavity of resorption, following big piston is installed on cavity of resorption, and last big piston is installed on epicoele.
The piston rod middle part of three station double-action dual-rod hydraulic cylinders has step a, and step a both sides have less than the step b of step a and step c, and step a external diameter is less than the boss internal diameter.
The following big piston of three station double-action dual-rod hydraulic cylinders is set in the step c of piston rod, and last big piston is set in the step b of piston rod.
The cylinder body of three station double-action dual-rod hydraulic cylinders is shaped on through hole along boss.
When the upper and lower cavity of oil hydraulic cylinder fed hydraulic oil, the piston of oil hydraulic cylinder and piston rod will move to corresponding position, and rest on this position.When feeding hydraulic oil such as the epicoele when oil hydraulic cylinder, piston rod will move and rest on position bottom; When cavity of resorption fed hydraulic oil, piston rod will move and rest on position topmost; And when upper and lower cavity fed hydraulic oil simultaneously, piston rod will move and rest on position intermediate.
The present invention has following advantage than prior art:
(1) a kind of three station double-action dual-rod hydraulic cylinders provided by the invention, an oil hydraulic cylinder just can be realized the accurate control and the location of three positions.And common oil hydraulic cylinder commonly used only has two stations (the cylinder bar stretches out and two positions of withdrawing fully fully), the common oil hydraulic cylinder of coming round realizes that the accurate control and the location of three positions are impossible, therefore common oil hydraulic cylinder can only be realized the control of two gears, and the control of three gears must cooperatively interact and could realize by two oil hydraulic cylinders.
(2) utilize three station double-action dual-rod hydraulic cylinders provided by the invention to carry out the numerical control machine tool of three gear controls, compare with the numerical control machine tool that utilizes common oil hydraulic cylinder to carry out three gear controls, hydraulic system is simplified, hydraulic element, pipeline are less, control is simple, possible leakage point is few, and environmental pollution is little.
Description of drawings
Fig. 1 three station double-action dual-rod hydraulic cylinder schematic representation
Whole-cutaway view when Fig. 2 three station double-action dual-rod hydraulic cylinders are in " bottom gear " at lathe.
Whole-cutaway view when Fig. 3 three station double-action dual-rod hydraulic cylinders are in " top gear " at lathe.
Whole-cutaway view when Fig. 4 three station double-action dual-rod hydraulic cylinders are in " neutral " at lathe.
Among the figure: 1. lower end cap, 2. cylinder body 3. descends big piston, 4. piston rod, 5. go up big piston, 6. upper end cap 7. detects piece, 8. detecting switch, 9. detecting switch, 10. detecting switch, 11. supports, 12.B hydraulic fluid port, 13. epicoele, 14. step b, 15. boss, 16. step a, 17. cavity of resorption, 18.A hydraulic fluid port, 19. step c, 20. gearbox casings, 21. splined shaft, 22. shifting slide gear groups, 23. shift forks.
Embodiment
Following embodiment is the example that is applied as with numerical control machine tool, but is not limited to this application area.
See that Fig. 1, three station double-action dual-rod hydraulic cylinders comprise: lower end cap 1, cylinder body 2, time big piston 3, piston rod 4, last big piston 5, upper end cap 6; Lower end cap 1 and upper end cap 6 are fixed together with cylinder body 2 respectively, last big piston 5 and following big piston 3 are assemblied in respectively in two chambeies up and down of cylinder body 2 and also can move up and down, and be enclosed within respectively on the piston rod 4, piston rod 4 stretches out outside the cylinder through the center of upper end cap 6 and lower end cap 1 respectively up and down, can move up and down.
Three station double-action dual-rod hydraulic cylinders are installed on the shaft transmission of numerical control machine tool, on the piston rod in the casing outside, install one and detect piece, a detecting switch support is installed on the cylinder cover of homonymy, three detecting switches are installed on support, a shift fork, the shifting slide gear set associative on shift fork and the splined shaft are installed on the piston rod of casing the inside again simultaneously.
These three positions, each position all can have a pair of different gear to be meshing with each other (if certain lathe has the position of a neutral, then this position does not have gear to be meshing with each other, Transmitted chains is in complete disengaged position, with hand rotating spindle easily just), each position also all has a different detecting switch to connect, and sends the signal that puts in place, thereby has realized the accurate control of three gears of numerical control machine tool.
See Fig. 2, fix a detection piece 7 in the upper end of piston rod 4, on upper end cap 6, fix a support 11 simultaneously, three detecting switches (8,9,10) are installed on the support 11.The shift fork 23 that is connected in the lower end of piston rod, shift fork 23 and shifting slide gear group 22 on the splined shaft 21 link (the shifting slide gear group can move up and down along splined shaft).When hydraulic oil when B hydraulic fluid port 12 enters the epicoele 13 of oil hydraulic cylinder, action of hydraulic force is on the upper side of the step b14 of last big piston 5 upper surfaces and piston rod 4, thereby big piston 5 and piston rod 4 together move down in the promotion, meanwhile driving the detection piece 7 of piston rod 4 upper ends and the shift fork 23 of lower end and the shifting slide gear group 22 that links with shift fork moves down with piston rod, when moving to when contacting with the boss 15 at cylinder body 2 middle parts, last big piston 5 stops to move, this moment, the middle bench a16 of piston rod 4 contacted with following big piston 3, under the action of hydraulic force that acts on the step b14 upper side, piston rod 4 drives down, and big piston 3 continues to move down, contact with lower end cap 1 up to following big piston 3, this moment, nethermost a pair of gear was meshed, lathe enters the bottom gear state, detect the position that piece 7 has rested on nethermost detecting switch 10, nethermost detecting switch 10 is connected, sending signal tells control system bottom gear gear engagement to put in place, at any time can start main shaft, thereby realize a shift transformation of numerical control machine tool;
As shown in Figure 3, when hydraulic oil when A hydraulic fluid port 18 enters the cavity of resorption 17 of oil hydraulic cylinder, action of hydraulic force is on the downside of the step c19 of following big piston 3 lower surfaces and piston rod 4, thereby big piston 3 and piston rod 4 together move up under promoting, meanwhile driving the detection piece 7 of piston rod 4 upper ends and the shift fork 23 of lower end and the shifting slide gear group 22 that links with shift fork moves up with piston rod, stop to move when big piston 3 moves to and contacts with the boss 15 at cylinder body 2 middle parts instantly, the upper side of the step a16 at piston rod 4 middle parts contacts with last big piston 5 at this moment, under the action of hydraulic force on the downside of the step c19 that acts on piston rod 4, piston rod 4 drives upward, and big piston 5 continues to move up, contact with upper end cap 6 up to last big piston 5, this moment, uppermost a pair of gear was meshed, lathe enters the top gear state, detect the position that piece 7 has rested on uppermost detecting switch 8, uppermost detecting switch 8 is connected, sending signal tells control system top gear gear engagement to put in place, at any time can start main shaft, thereby realize second shift transformation of numerical control machine tool;
As shown in Figure 4, when hydraulic oil simultaneously through B hydraulic fluid port 12, A hydraulic fluid port 18 enters the epicoele 13 of oil hydraulic cylinder, during cavity of resorption 17, act on the step c19 of piston rod 4, step b14 goes up the mutual balance of hydraulic action, the hydraulic coupling that acts on down big piston 3 lower surfaces promotes down, and big piston 3 moves up, big piston 5 moves down and the hydraulic coupling that acts on big piston 5 upper surfaces promotes upward, if this moment, piston rod 4 was in position topmost, then piston rod 4 just moves down with last big piston 5, if this moment, piston rod 4 was in position bottom, then piston rod just moves up with following big piston 3, the detection piece 7 of piston rod upper end and the shift fork of lower end 23 reach the shifting slide gear group 22 that links with shift fork and move with piston rod 4, when big piston 3 and last big piston 5 contact with the boss 15 at cylinder body 2 middle parts down, stop to move, this moment, piston rod 4 rested on the neutral position, shown in " figure three ", be meshed without any a pair of gear this moment, it is the position that lathe is in neutral, detect the position that piece 7 has rested on middle detecting switch 9, middle detecting switch 9 is connected, sending signal tells the control system lathe to be in the position of neutral, can't start main shaft, tool setting can be carried out with the hand rotating spindle in this position, thereby has realized the 3rd shift transformation of numerical control machine tool.
Claims (7)
1. station double-action dual-rod hydraulic cylinder, comprise cylinder body (2), piston rod (4), following big piston (3) and last big piston (5), it is characterized in that, cylinder body (2) inwall middle part has annular boss (16), cylinder body (2) is divided into epicoele (13) and cavity of resorption (17), following big piston (3) is installed on cavity of resorption, and last big piston (5) is installed on epicoele.
2. three station double-action dual-rod hydraulic cylinders according to claim 1, it is characterized in that, piston rod (4) middle part has step a (16), and step a (16) both sides have less than the step b (14) of step a (16) and step c (19), and step a (16) external diameter is less than boss (15) internal diameter.
3. three station double-action dual-rod hydraulic cylinders according to claim 1 is characterized in that following big piston (3) is set in step c (19), and last big piston is set in step b (14).
4. three station double-action dual-rod hydraulic cylinders according to claim 1 is characterized in that cylinder body (2) is shaped on through hole along boss (15).
5. according to the described three station double-action dual-rod hydraulic cylinders of one of claim 1 to 5, it is characterized in that it is provided with position detecting device.
6. three station double-action dual-rod hydraulic cylinders according to claim 5 is characterized in that, described position detecting device is the detection piece (7) that is installed on piston rod (4) upper end and the detecting switch (8,9,10) of three positions of correspondence.
7. a lathe is characterized in that, the transforming gear of shaft transmission adopts the described three station double-action dual-rod hydraulic cylinders of claim 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200554432U CN202012526U (en) | 2011-03-03 | 2011-03-03 | Bi-rod hydraulic cylinder with three stations and double actions |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200554432U CN202012526U (en) | 2011-03-03 | 2011-03-03 | Bi-rod hydraulic cylinder with three stations and double actions |
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| Publication Number | Publication Date |
|---|---|
| CN202012526U true CN202012526U (en) | 2011-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200554432U Expired - Lifetime CN202012526U (en) | 2011-03-03 | 2011-03-03 | Bi-rod hydraulic cylinder with three stations and double actions |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102145466A (en) * | 2011-03-03 | 2011-08-10 | 成都飞机工业（集团）有限责任公司 | Three-station double-acting double-pole hydraulic cylinder |
| CN103447319A (en) * | 2013-09-05 | 2013-12-18 | 太原重工股份有限公司 | Three-station large carrier roller device |
| CN103551918A (en) * | 2013-11-05 | 2014-02-05 | 常州工程职业技术学院 | Drum wheel device |
| CN103567812A (en) * | 2013-11-05 | 2014-02-12 | 常州工程职业技术学院 | Positioning oil cylinder for positioning drum |
-
2011
- 2011-03-03 CN CN2011200554432U patent/CN202012526U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102145466A (en) * | 2011-03-03 | 2011-08-10 | 成都飞机工业（集团）有限责任公司 | Three-station double-acting double-pole hydraulic cylinder |
| CN103447319A (en) * | 2013-09-05 | 2013-12-18 | 太原重工股份有限公司 | Three-station large carrier roller device |
| CN103551918A (en) * | 2013-11-05 | 2014-02-05 | 常州工程职业技术学院 | Drum wheel device |
| CN103567812A (en) * | 2013-11-05 | 2014-02-12 | 常州工程职业技术学院 | Positioning oil cylinder for positioning drum |
| CN103567812B (en) * | 2013-11-05 | 2016-06-01 | 常州工程职业技术学院 | For the positional cylinder that drum is positioned |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111019 |