CN202132305U - High-pressure oil cylinder with buffering device in rod cavity - Google Patents
High-pressure oil cylinder with buffering device in rod cavity Download PDFInfo
- Publication number
- CN202132305U CN202132305U CN 201120272738 CN201120272738U CN202132305U CN 202132305 U CN202132305 U CN 202132305U CN 201120272738 CN201120272738 CN 201120272738 CN 201120272738 U CN201120272738 U CN 201120272738U CN 202132305 U CN202132305 U CN 202132305U
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- China
- Prior art keywords
- piston
- cylinder
- cushion collar
- oil cylinder
- cylinder sleeve
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- Expired - Fee Related
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- 230000003139 buffering effect Effects 0.000 title abstract description 12
- 238000013016 damping Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 239000003921 oil Substances 0.000 description 48
- 239000012530 fluid Substances 0.000 description 27
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
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- Fluid-Damping Devices (AREA)
Abstract
The utility model discloses a high-pressure oil cylinder with a buffering device in a rod cavity, which comprises a piston, a piston rod, a cylinder sleeve and a cylinder barrel. A throttling orifice is arranged on an end face of one end of the cylinder sleeve close to the piston, and a throttling member is arranged in the throttling orifice. A buffering sleeve is sleeved on the piston rod, a first stair is arranged at a position on the outer circumference of the piston rod, the buffering sleeve is sleeved on the position, and a second stair is arranged on the inner circumference of the buffering sleeve. The outer circumference of one end of the buffering sleeve close to the cylinder sleeve is a cone face. The high-pressure oil cylinder has the advantages of being capable of achieving gradually throttling, remitting the impact of the piston to the cylinder barrel, lowering the starting pressure during starting of the oil cylinder and the like.
Description
Technical field
The utility model relates to a kind of high-voltage oil cylinder, is provided with the high-voltage oil cylinder of damping device in especially a kind of rod chamber.
Background technique
Oil cylinder, promptly oil hydraulic cylinder is a straight line moving type executive component commonly used in the hydraulic system.Piston under the driving of fluid pressure in oil cylinder high-speed motion.When the bar head of piston rod arrived the oil cylinder bottom, piston will bump with oil hydraulic cylinder, and piston produces oil hydraulic cylinder and impacts, and causes very big noise.Be to reduce the impact of piston, all be provided with damping device as first at the bar of piston rod to the oil cylinder bottom.Especially when the oil cylinder working pressure higher with heavy moving parts when big greater than 30MPa and piston movement speed; In order to prevent that piston from causing noise and impact in stroke end and cylinder sleeve generation mechanical collision; Even cause the hydraulic oil cylinder driving part to damage; Damping device need be set, to reduce impact to oil cylinder in oil cylinder.Common buffering method has throttling buffering and off-load buffering.When adopting the mode of throttling buffering, cause the heating phenomenon easily, Sealing damages easily.
In the prior art, general off-load structure is on the cylindrical of cylinder barrel, relief arrangement to be housed.Be connected through aperture between relief arrangement and the cylinder barrel, relief arrangement is connected with hydraulic fluid port through oil guide pipe again.Relief arrangement is made up of parts such as unloading cavity III, plug screw, spring and spools.When piston got into buffer position, fluid flowed into hydraulic fluid port through aperture, relief arrangement, oil guide pipe, is back to fuel tank by hydraulic fluid port, reduced the purpose of piston to the impact of cylinder barrel end face to reduce the power to piston, to reach.In the structure of this existing employing aperture, it is very big that aperture receives that the restriction of cylinder barrel and spool can not open, and difficulty of processing is big, influences the sealability of Sealing on the piston.
The model utility content
The utility model is the deficiency that exists in the above-mentioned prior art for avoiding, and the high-voltage oil cylinder that is provided with damping device in a kind of rod chamber is provided, and alleviates the purpose of piston to the impact of cylinder sleeve to realize throttling gradually, and the breakout pressure when reducing oil cylinder and starting.
The utility model adopts following technological scheme for the technical solution problem.
Be provided with the high-voltage oil cylinder of damping device in the rod chamber, comprise piston, piston rod, cylinder sleeve and cylinder barrel, its structural feature is, the end face near piston one end of said cylinder sleeve is provided with throttle orifice, and said orifice-built-in has throttling element; Said upper cover of piston rod is provided with cushion collar, and the position of sheathed said cushion collar is provided with first step on the piston rod outer circumferential face, on the inner peripheral surface of cushion collar, is provided with second step; Near an end of cylinder sleeve, the outer circumferential face of cushion collar is set to the conical surface on said cushion collar.
The structural feature that is provided with the high-voltage oil cylinder of damping device in the utility model rod chamber also is:
Near piston one end, the cylinder sleeve inner peripheral surface is being provided with the mode of cushion collar outer circumferential face Spielpassung on the said cylinder sleeve, and the matching gap when said cushion collar matches with cylinder sleeve is 0.06mm～0.2mm.
Cooperating between said cushion collar inner peripheral surface and the piston rod outer circumferential face is Spielpassung, and matching gap is 0.5mm～2mm.
Compared with present technology, the utility model beneficial effect is embodied in:
When in-oil cylinder piston rod stretched out, piston rod was moved to the left, and under the effect of pressure oil, the step surface of the first step on the step surface of the second step of cushion collar inner chamber and the piston rod outer circumferential face closely cooperates, and fluid can't pass through from the cushion collar inner chamber.When cushion collar gets in the cylinder sleeve,, and, realize that oil cylinder slows down, and prevents noise and impact that piston and cylinder sleeve generation mechanical collision cause through the throttle orifice fixed restriction on the cylinder sleeve through the gap throttling gradually between cushion collar cylindrical and the cylinder sleeve inner chamber.When piston rod to oil cylinder when motion bottom, fluid promotes cushion collar and moves to piston direction, the step surface of the first step on the step surface of the second step of cushion collar inner chamber and the piston rod outer circumferential face separates, formation fluid passage reduces the oil cylinder breakout pressure.The high-voltage oil cylinder of the utility model has and can alleviate piston effectively to the impact of cylinder sleeve and the advantages such as breakout pressure when reducing oil cylinder and starting.
Description of drawings
Fig. 1 is the structural representation of the high-voltage oil cylinder of the utility model.
Fig. 2 is the partial enlarged drawing among Fig. 1.
Fig. 3 is the rod chamber buffering course schematic representation of the high-voltage oil cylinder of the utility model.
Fig. 4 is the high-voltage oil cylinder rodless cavity oil-feed of the utility model, the partial enlarged drawing of rod chamber buffering course.
The partial enlarged drawing of oil cylinder start-up course when Fig. 5 is the rod chamber oil-feed of high-voltage oil cylinder of the utility model.
Label in accompanying drawing 1～accompanying drawing 5: 1 cylinder sleeve, 2 throttling elements, 3 cylinder barrels, 4 piston rods, 41 first steps, 5 cushion collars, 51 conical surfaces, 52 second steps, 6 pistons, 7 rod chambers, 71 rod chamber hydraulic fluid ports, 8 rodless cavities, 81 rodless cavity hydraulic fluid ports.
Below pass through embodiment, and combine accompanying drawing that the utility model is described further.
Embodiment
Referring to accompanying drawing 1～accompanying drawing 5; Be provided with the high-voltage oil cylinder of damping device in the rod chamber, comprise piston 6, piston rod 4, cylinder sleeve 1 and cylinder barrel 3, it is characterized in that; The end face near piston 6 one ends of said cylinder sleeve 1 is provided with throttle orifice, and said orifice-built-in has throttling element 2; Be arranged with cushion collar 5 on the said piston rod 4, the position of sheathed said cushion collar 5 is provided with first step 41 on piston rod 4 outer circumferential faces, on the inner peripheral surface of cushion collar 5, is provided with second step 52; Near an end of cylinder sleeve 1, the outer circumferential face of cushion collar 5 is set to the conical surface 51 on said cushion collar 5.Piston is divided into rod chamber 7 and rodless cavity 8 with inner cavity of cylinder, and rod chamber is positioned at piston rod and belongs to a side, and rodless cavity is positioned at a side of piston-rodless.The two ends of cylinder barrel are respectively equipped with rod chamber hydraulic fluid port 71 and rodless cavity hydraulic fluid port 81.When in-oil cylinder piston rod 4 stretches out; Piston rod 4 is moved to the left; Under the effect of pressure oil, the step surface of the first step 41 on the step surface of the second step 52 of cushion collar 5 inner chambers and piston rod 4 outer circumferential faces closely cooperates, and fluid can't pass through from cushion collar 5 inner chambers.When cushion collar 5 gets in the cylinder sleeve 1, through the gap throttling gradually between cushion collar 5 cylindricals and cylinder sleeve 1 inner chamber, and, realize that oil cylinder slows down through the throttle orifice fixed restriction on the cylinder sleeve 1, prevent that piston 6 and cylinder sleeve 1 from noise and the impact that mechanical collision causes taking place.When rod chamber oil-feed, piston rod 4 move to the oil cylinder bottom; Fluid promotes cushion collar 5 and moves to piston 6 directions; The step surface of the first step 41 on the step surface of the second step 52 of cushion collar 5 inner chambers and piston rod 4 outer circumferential faces separates, and forms the fluid passage, reduces the oil cylinder breakout pressure.
Near piston 6 one ends, cylinder sleeve 1 inner peripheral surface is being provided with the mode of cushion collar 5 outer circumferential face Spielpassung on the said cylinder sleeve 1, and the matching gap when said cushion collar 5 matches with cylinder sleeve 1 is 0.06mm～0.2mm.Through the size of the matching gap between adjustment cushion collar 5 and the cylinder sleeve 1, the amount of restriction when controlling throttling, thus the speed that the adjustment oil cylinder slows down is alleviated the collision between piston and the cylinder sleeve better.
Cooperating between said cushion collar 5 inner peripheral surfaces and piston rod 4 outer circumferential faces is Spielpassung, and matching gap is 0.5mm～2mm.Size through the matching gap between adjustment cushion collar 5 and the piston rod 4; Control the mistake oil mass of the fluid passage between the two; Make that second step 52 and first step 41 can be under oil liquid pressures deciliter, realize that oil cylinder slows down and reduces the purpose of oil cylinder breakout pressure.
As depicted in figs. 1 and 2, when oil cylinder rodless cavity hydraulic fluid port 81 advanced pressure oil, fluid promoted piston 6 to left movement, and piston rod 4 is pushed out oil cylinder.
As shown in Figure 4; When cushion collar 5 moves to the position of cylinder sleeve 1; Cushion collar 5 progresses in the inner chamber of cylinder sleeve 1; The fluid that leads to rod chamber hydraulic fluid port 71 increases the cavity inner fluid pressure of 1 of piston 6 and cylinder sleeve through gap between cushion collar 5 and the cylinder sleeve 1 and the throttling passage throttling on the throttling element 2, promotes cushion collar 6 and moves to cylinder sleeve 1 direction.At this moment, the second step 52 of cushion collar 5 inner chambers and the first step of piston rod 4 inner chambers 41 are fitted, and stop fluid between cushion collar 5 and piston rod 4, to flow, and fluid produces deboost, the movement velocity of the piston 6 that slows down to piston 6.Because cushion collar 5 outer circumferential faces are made as the conical surface 51, make that fluid is a progressive process through the throttling process in the gap between cushion collar 5 and the cylinder sleeve 1, oil cylinder moves steadily and piston 6 slows down gradually, makes that the impact of 6 pairs of cylinder sleeves 1 of piston is less.The throttle orifice that throttling element 2 is housed on the cylinder sleeve 1 is used for the highest choke pressure of cavity inner fluid of 1 of control piston 6 and cylinder sleeve, prevents that overpressure from making cylinder barrel 3 distortion or explosions.
As shown in Figure 5; When cylinder rod chamber 71 oil-feeds, oil cylinder starts, and fluid promotes cushion collar 5 and moves to piston 6 directions; The second step 52 of cushion collar 5 inner chambers and the first step of piston rod 4 inner chambers 41 are thrown off; Form the fluid passage, add that the throttle orifice of gap and throttling element 2 of cushion collar 5 and cylinder sleeve 1 is oily excessively, thus reduction oil cylinder breakout pressure.
Claims (3)
1. be provided with the high-voltage oil cylinder of damping device in the rod chamber, comprise piston (6), piston rod (4), cylinder sleeve (1) and cylinder barrel (3), it is characterized in that, the end face near piston (6) one ends of said cylinder sleeve (1) is provided with throttle orifice, and said orifice-built-in has throttling element (2); Be arranged with cushion collar (5) on the said piston rod (4), the position of sheathed said cushion collar (5) is provided with first step (41) on piston rod (4) outer circumferential face, on the inner peripheral surface of cushion collar (5), is provided with second step (52); Go up the end near cylinder sleeve (1) at said cushion collar (5), the outer circumferential face of cushion collar (5) is set to the conical surface (51).
2. be provided with the high-voltage oil cylinder of damping device in the rod chamber according to claim 1; It is characterized in that; Said cylinder sleeve (1) is gone up near piston (6) one ends; Cylinder sleeve (1) inner peripheral surface is being provided with the mode of cushion collar (5) outer circumferential face Spielpassung, and said cushion collar (5) is 0.06mm～0.2mm with the matching gap of cylinder sleeve (1) when matching.
3. be provided with the high-voltage oil cylinder of damping device in the rod chamber according to claim 1, it is characterized in that, cooperating between said cushion collar (5) inner peripheral surface and piston rod (4) outer circumferential face is Spielpassung, and matching gap is 0.5mm～2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120272738 CN202132305U (en) | 2011-07-29 | 2011-07-29 | High-pressure oil cylinder with buffering device in rod cavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120272738 CN202132305U (en) | 2011-07-29 | 2011-07-29 | High-pressure oil cylinder with buffering device in rod cavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202132305U true CN202132305U (en) | 2012-02-01 |
Family
ID=45521074
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120272738 Expired - Fee Related CN202132305U (en) | 2011-07-29 | 2011-07-29 | High-pressure oil cylinder with buffering device in rod cavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202132305U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015102164A (en) * | 2013-11-25 | 2015-06-04 | カヤバ工業株式会社 | Fluid pressure cylinder |
| US11319972B1 (en) | 2021-05-11 | 2022-05-03 | Caterpillar Inc. | Hydraulic cylinder snubbing retention arrangement |
| WO2022204011A1 (en) | 2021-03-23 | 2022-09-29 | Caterpillar Inc. | Hydraulic cylinder snubbing retention arrangement |
-
2011
- 2011-07-29 CN CN 201120272738 patent/CN202132305U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015102164A (en) * | 2013-11-25 | 2015-06-04 | カヤバ工業株式会社 | Fluid pressure cylinder |
| CN105705801A (en) * | 2013-11-25 | 2016-06-22 | Ｋｙｂ株式会社 | Hydraulic cylinder |
| WO2022204011A1 (en) | 2021-03-23 | 2022-09-29 | Caterpillar Inc. | Hydraulic cylinder snubbing retention arrangement |
| US11319972B1 (en) | 2021-05-11 | 2022-05-03 | Caterpillar Inc. | Hydraulic cylinder snubbing retention arrangement |
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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: 20120201 Termination date: 20170729 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |