CN102384127A - Three-position oil cylinder driving device for gear shifting of machine tool - Google Patents
Three-position oil cylinder driving device for gear shifting of machine tool Download PDFInfo
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- CN102384127A CN102384127A CN2011103875726A CN201110387572A CN102384127A CN 102384127 A CN102384127 A CN 102384127A CN 2011103875726 A CN2011103875726 A CN 2011103875726A CN 201110387572 A CN201110387572 A CN 201110387572A CN 102384127 A CN102384127 A CN 102384127A
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Abstract
The invention provides a three-position oil cylinder driving device for gear shifting of a machine tool. The three-position oil cylinder driving device comprises an oil cylinder, wherein a positioning step is arranged in the middle part in the oil cylinder; cylinder covers are fixed at two ends of the oil cylinder respectively; hydraulic fluid ports are formed on the cylinder covers; a first piston and a second piston are arranged in the oil cylinder in a slideable manner; a positioning step is arranged in the middle of the first piston; the second piston is sleeved on one end of the first piston in a slideable manner; and the oil acting area at the right end of the positioning step in the middle of the first piston is smaller than the total oil acting area at the left ends of the first and the right pistons, but is not larger than the oil acting area at the left end of the first piston, so that three types of positioning for the two pistons are realized.
Description
Technical field
The present invention relates to mechanical manufacturing field, especially a kind of self-shifting three cylinder drives of lathe that are used for.
Background technique
Main shaft is the motion of lathe high speed rotating, is the critical component of lathe, and its performance directly influences the quality of processing of part.In actual course of working,, need main shaft that different rotating speed is arranged for surface roughness, form and position tolerance and the cutting force etc. of material different in order to guarantee part.The speed change of main shaft generally adopts automatically controlled or gearbox is realized.Automatically controlled main shaft directly adopts the rotating speed of frequency conversion system control main shaft, and shaft transmission then adopts different Gear combination to realize the control of a few retaining different rotating speeds.
Existing a lot of machine adopted shaft transmission forms, the rotating speed of main shaft and output power must be supporting, if with single gear ratio, no doubt can change spindle speed, but can not make full use of the power of spindle motor.For rotating speed and the power of motor of taking into account main shaft, in practical application, adopt different Gear combination usually, through changing the effect that different gear meshing reach the gearshift speed governing.When changing gear meshing, intermeshing two gears of script are relatively moved, could break away from engagement, mesh once more with other gear again, so every group of gear has two positions at least, with the change wheel gear ratio.
The general hydraulic oil cylinder driving that adopts in the existing technology; Make the position change of gear; Application number is that 200910010763.3 patent of invention has proposed a kind of bilateral opposite direction fuel tank driving machine, can realize that the piston rod of both sides oppositely drives simultaneously, but because hydraulic oil cylinder driving is difficult to accurate location; Can only rely on positioning boss to carry out the position and limit, cause piston rod to locate at the limit position at two ends.
Summary of the invention
The problem that is difficult to locate to hydraulic oil cylinder driving; The present invention proposes a kind of three cylinder drives that are used for the lathe gearshift that can position three positions; Said drive unit comprises oil cylinder; The bosom of said oil cylinder is provided with positioning step, and its two ends are fixed with cylinder cap respectively, and said cylinder cap is provided with hydraulic fluid port; Be provided with the first piston and second piston in the said oil cylinder slidably, the middle part of said first piston is provided with positioning step, and an end stretches out outside the said cylinder cap, and the other end is for be inserted in said in-oil cylinder abutting end slidably; Said second piston is placed on the abutting end of said first piston slidably; Simultaneously, the fluid active area of the positioning step right-hand member at said first piston of the present invention middle part is less than the fluid active area sum of the said first piston and the second piston left end, and is not more than the fluid active area of said first piston left end.
For simplifying said oil cylinder mechanism, can an end of said cylinder cap be inserted in the said oil cylinder, form limited step, to limit the said first piston and second piston at in-oil cylinder limit position.
When the hydraulic fluid port cut-in pressure of a said cylinder cap was oily, the said first piston and second piston were simultaneously in oil pressure pressure effect campaign, until contacting with the end face of said cylinder cap.When the hydraulic fluid port of said two cylinder caps feeds pressure oil simultaneously since pressure oil to act on said first piston different with the area on second piston, the first piston and second piston are moved simultaneously; Touch said in-oil cylinder positioning step until second piston end face wherein, the second piston stop motion, and first piston is parked in the neutral position.Like this, the connection through said oil cylinder pressure at two ends oil and ending realizes the location of three positions of piston.The concrete stroke of said piston can be regulated through the piston rod of making different length.
Description of drawings
Accompanying drawing 1 is the view after the cylinder cap 22 of the preferred embodiment of the present invention feeds pressure oil;
Accompanying drawing 2 is the first piston 3 of the preferred embodiment of the present invention and the disassemblying structure schematic representation of second piston 4;
Accompanying drawing 3 is the view after the cylinder cap 21 of the preferred embodiment of the present invention feeds pressure oil;
Accompanying drawing 4 is the view after preferred embodiment of the present invention cylinder cap 21 and cylinder cap 22 feed pressure oils;
1 oil cylinder, 11 positioning steps, 21 cylinder caps, hydraulic fluid port 211,22 cylinder caps, hydraulic fluid port 221,3 first pistons, positioning step 31, location end face 311, location end face 312, exhaust port 32,4 second pistons.
Embodiment
Referring to illustrated in figures 1 and 2, three cylinder drives that are used for the lathe gearshift of the preferred embodiment of the present invention comprise an oil cylinder 1, are inserted with cylinder cap 21 and cylinder cap 22 respectively in the inside, two ends of oil cylinder 1.As shown in Figure 1, its left end be cylinder cap 21, right-hand member be cylinder cap 22, and an end that inserts oil cylinder 1 forms limited step in oil cylinder 1; Simultaneously, also be provided with positioning step 11, to limit first piston 3 and the stroke of second piston 4 in oil cylinder 1 in the oil cylinder 1 respectively at the bosom of oil cylinder 1.
The middle part of first piston 3 is provided with positioning step 31, with the left and right sides the sphere of activities of restriction first piston 3.The right-hand member of first piston 3 stretches out outside the cylinder cap 22 of right-hand member, and left end is an abutting end, is inserted in slidably in the oil cylinder 1.Second piston 4 is placed on the abutting end of first piston 3 slidably, and its right-hand member step 31 that can be positioned blocks.
On cylinder cap 21 and cylinder cap 22, be respectively arranged with hydraulic fluid port 211 and hydraulic fluid port 221, be used to promote the motion of the first piston 3 and second piston 4.
When the hydraulic fluid port 221 of the cylinder cap 22 of right-hand member feeds pressure oils, and during the no pressure of the hydraulic fluid port of cylinder cap 21 211, the first piston 3 and second piston 4 simultaneously to left movement, stop when the left side of second piston 4 touches the right side of cylinder cap 21 under the oil liquid pressure effect; And the location end face 312 of the left end of the positioning step 31 on the first piston 3 also stops slip owing to run into the right-hand member end face of second piston 4, and this moment, the particular location of each piston was as shown in Figure 1, and the first piston 3 and second piston 4 all are in position, a left side;
When the cylinder cap 22 of left end cylinder cap 21 and right-hand member feeds pressure oil simultaneously, the pressure to the right that comes from hydraulic fluid port 211 that the first piston 3 and second piston 4 all receive at left end; Simultaneously, the right-hand member of the positioning step 31 on the first piston 3 receives the pressure left that comes from hydraulic fluid port 221.Because the fluid active area that the fluid active area that first piston 3 and second piston 4 receive at left end receives greater than the right-hand member of positioning step 31 is so the first piston 3 and second piston 4 move right simultaneously., the right-hand member end face of second piston 4 stops when touching the end face of the positioning step 11 in the oil cylinder 1.After stopping, because the active area of left end fluid so first piston 3 can not continue to slide, but stops at the neutral position less than the fluid active area of positioning step 31 right-hand members to the right on the first piston 3.
When so the pressure oil oil pressure that feeds when the cylinder cap 22 of the cylinder cap 21 of left end and right-hand member is identical; First piston 3 will rest on the neutral position; Must meet the following conditions: the fluid active area of positioning step 31 right-hand members at first piston 3 middle parts should be less than the fluid active area sum of first piston 3 and second piston, 4 left ends, and is not more than the fluid active area of first piston 3 left ends.
Therefore, the present invention can be through the suitable fluid active area of design, and the connection of control oil cylinder 1 two ends hydraulic fluid port pressure oil and ending, and can realize the location of three kinds of positions of two pistons.
The concrete stroke of each piston can be regulated through the piston rod of making different length.In the present invention; The concrete stroke of second piston 4 can combine shown in Figure 4; Calculate as follows: the distance between the end face of the positioning step 11 among the figure in the right side of end cap 21 and the oil cylinder 1 is L1, and the running length of second piston 4 deducts the length of second piston 4 for the length value of this L1.The stroke of first piston 3 can combine shown in Figure 1 calculating: the distance among the figure between the end face 311 of location, the left side of the left side of end cap 21 and positioning step 31 is L2, and the length of positioning step 31 is L 3, and the stroke of first piston 3 is the length that the length of L2 deducts L3.
In three cylinder drives of the present invention, also be formed with a cavity between first piston 3, second piston 4 and the oil cylinder 1, have exhaust port 32 on the first piston 3, this cavity is through this exhaust port 32 and outside ventilation, to reduce slip resistance.
Last institute should be noted that; Above embodiment is only in order to technological scheme of the present invention to be described but not to the restriction of protection domain of the present invention; Although the present invention has been done detailed description with reference to preferred embodiment; Those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technological scheme of the present invention, and do not break away from the essence and the scope of technological scheme of the present invention.
Claims (3)
1. three cylinder drives that are used for lathe gearshift, it is characterized in that: said drive unit comprises oil cylinder, and the bosom of said oil cylinder is provided with positioning step, and its two ends are fixed with cylinder cap respectively, and said cylinder cap is provided with hydraulic fluid port; Be provided with the first piston and second piston in the said oil cylinder slidably, said first piston middle part is provided with positioning step, and an end stretches out outside the said cylinder cap, and the other end is for be inserted in said in-oil cylinder abutting end slidably; Said second piston is placed on the abutting end of said first piston slidably;
The fluid active area of the positioning step right-hand member at said first piston middle part is less than the fluid active area sum of the said first piston and the second piston left end, and is not more than the fluid active area of said first piston left end.
2. three cylinder drives that are used for the lathe gearshift as claimed in claim 1, it is characterized in that: an end of said cylinder cap inserts in the said oil cylinder, forms limited step.
3. three cylinder drives that are used for the lathe gearshift as claimed in claim 1; It is characterized in that: form a cavity between said first piston, second piston and the oil cylinder; Have exhaust port on the said first piston, said cavity is through this exhaust port and outside ventilation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103875726A CN102384127A (en) | 2011-11-25 | 2011-11-25 | Three-position oil cylinder driving device for gear shifting of machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103875726A CN102384127A (en) | 2011-11-25 | 2011-11-25 | Three-position oil cylinder driving device for gear shifting of machine tool |
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| Publication Number | Publication Date |
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| CN102384127A true CN102384127A (en) | 2012-03-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103875726A Pending CN102384127A (en) | 2011-11-25 | 2011-11-25 | Three-position oil cylinder driving device for gear shifting of machine tool |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465355A (en) * | 2014-09-03 | 2016-04-06 | 上海汽车集团股份有限公司 | Dual-clutch transmission and hydraulic control system thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2517895Y (en) * | 2002-01-19 | 2002-10-23 | 刘亚军 | Double-piston cylinder |
| CN101377237A (en) * | 2008-10-09 | 2009-03-04 | 济南二机床集团有限公司 | Hydraulic speed regulating device |
| 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 |
| CN202402387U (en) * | 2011-11-25 | 2012-08-29 | 广州市珠江机床厂有限公司 | Three-position oil cylinder driving device for machine tool shift |
-
2011
- 2011-11-25 CN CN2011103875726A patent/CN102384127A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2517895Y (en) * | 2002-01-19 | 2002-10-23 | 刘亚军 | Double-piston cylinder |
| CN101377237A (en) * | 2008-10-09 | 2009-03-04 | 济南二机床集团有限公司 | Hydraulic speed regulating device |
| 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 |
| CN202402387U (en) * | 2011-11-25 | 2012-08-29 | 广州市珠江机床厂有限公司 | Three-position oil cylinder driving device for machine tool shift |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465355A (en) * | 2014-09-03 | 2016-04-06 | 上海汽车集团股份有限公司 | Dual-clutch transmission and hydraulic control system thereof |
| CN105465355B (en) * | 2014-09-03 | 2018-03-06 | 上海汽车集团股份有限公司 | Double-clutch speed changer and its hydraulic control system |
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Effective date of abandoning: 20160323 |
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