CN201636116U - Gap cushioning hydraulic cylinder - Google Patents
Gap cushioning hydraulic cylinder Download PDFInfo
- Publication number
- CN201636116U CN201636116U CN2010201278257U CN201020127825U CN201636116U CN 201636116 U CN201636116 U CN 201636116U CN 2010201278257 U CN2010201278257 U CN 2010201278257U CN 201020127825 U CN201020127825 U CN 201020127825U CN 201636116 U CN201636116 U CN 201636116U
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Abstract
The utility model relates to a gap cushioning hydraulic cylinder. A first cushioning sleeve and a second cushioning sleeve are arranged at the tail end of a piston rod in the hydraulic cylinder, and are respectively located at the two sides of a piston; the first cushioning sleeve is located in a rod cavity of the hydraulic cylinder, and the second cushioning sleeve is located in a rod-less cavity of the hydraulic cylinder; a cylinder head cushioning cavity is formed at the end part of a cylinder-head center hole, the inner diameter of the cylinder head cushioning cavity is larger than the outer diameter of the first cushioning sleeve, and the cylinder head cushioning cavity is matched with the first cushioning sleeve; a cylinder bottom cushioning cavity is formed at the end part of a cylinder-bottom center hole, the inner diameter of the cylinder bottom cushioning cavity is larger than the outer diameter of the second cushioning sleeve, and the cylinder bottom cushioning cavity is matched with the second cushioning sleeve. The gap cushioning hydraulic cylinder changes the through-flow area of the rod cavity and the rod-less cavity when in oil return, so as to form certain backpressure, thereby reducing the moving speed of a piston assembly, avoiding direct impact of the piston assembly to the head and bottom of the cylinder, and protecting the hydraulic cylinder; meanwhile, the running of the hydraulic cylinder is stable, and noise pollution is reduced.
Description
Technical field
The utility model belongs to the hydraulic equipment technical field, relates to a kind of improvement of oil hydraulic cylinder, specifically is a kind of gap buffer oil hydraulic cylinder.
Background technique
During the oil hydraulic cylinder operation, piston rod is to-and-fro motion in cylinder body, because piston rod self has certain quality, under pressure-driven, has very big momentum, when piston rod moves to terminal, moving piston rod tends to and cylinder head and cylinder bottom generation mechanical collision, produces very big surge pressure and noise.And these impacts also can cause the damage of associated components such as the damage of oil hydraulic cylinder itself and the pipe arrangement in the related system, valve class, instrument, influence the performance of machinery greatly.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, provide a kind of structure ingenious rational gap buffer oil hydraulic cylinder, this oil hydraulic cylinder can effectively prevent or reduce the collision of moving element to cylinder head and cylinder bottom, guarantees that oil hydraulic cylinder operates steadily, and is safe and reliable.
The technological scheme that provides according to the utility model, described gap buffer oil hydraulic cylinder comprises cylinder barrel, piston rod is housed in the cylinder barrel, the head end of cylinder barrel is equipped with cylinder head, offer the rod chamber hydraulic fluid port on the cylinder head, the cylinder head center offers the cylinder head center hole, between the inner hole wall of cylinder head center hole and the periphery wall of piston rod certain interval is arranged, and the rod chamber hydraulic fluid port is communicated with the oil hydraulic cylinder rod chamber by the cylinder head center hole; In the outer end of cylinder head gland is housed, gland center drilling, the head end of piston rod pass this hole sealed sliding of this Kong Bingyu movingly, and the tail end of piston rod is equipped with piston; The tail end of described cylinder barrel is connected with cylinder bottom, offers the rodless cavity hydraulic fluid port on the cylinder bottom, and the cylinder bottom center offers the cylinder bottom center hole, and the rodless cavity hydraulic fluid port is communicated with the oil hydraulic cylinder rodless cavity by the cylinder bottom center hole; It is characterized in that the tail end of described piston rod is equipped with first cushion collar and second cushion collar, first cushion collar, second cushion collar lay respectively at the both sides of piston, and first cushion collar is positioned at the oil hydraulic cylinder rod chamber, and second cushion collar is positioned at the oil hydraulic cylinder rodless cavity; The end of described cylinder head center hole forms a cylinder head buffer cavity, and the internal diameter of cylinder head buffer cavity is greater than the external diameter of first cushion collar, and the cylinder head buffer cavity matches with first cushion collar; The end of described cylinder bottom center hole forms a cylinder bottom buffer cavity, and the internal diameter of cylinder bottom buffer cavity is greater than the external diameter of second cushion collar, and the cylinder bottom buffer cavity matches with second cushion collar.
As further improvement of the utility model, the tail end place of described piston rod is provided with the circumferential step of an annular, and the internal diameter of first cushion collar is greater than the external diameter of circumferential step, and first cushion collar is sleeved on this circumferential step, by piston rod and piston location.The tail end that is sleeved on piston rod of described second cushion collar is located by the rod end screw thread.
The utility model compared with prior art, advantage is: by increasing by first cushion collar and second cushion collar, flow area when having changed rod chamber and rodless cavity oil return, formed certain back pressure, the travelling speed of piston assembly has slowed down, avoid piston assembly that cylinder head, cylinder bottom are directly impacted, protected oil hydraulic cylinder; Oil hydraulic cylinder is operated steadily, reduce noise pollution.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Description of reference numerals: 1-piston rod, 2-gland, 3-cylinder head, 4-rod chamber hydraulic fluid port, 5-cylinder barrel, 6-first cushion collar, 7-piston, 8-second cushion collar, 9-cylinder bottom, 10-rodless cavity hydraulic fluid port, 11-cylinder bottom center hole, 12-cylinder bottom buffer cavity, 13-circumferential step, 14-cylinder head buffer cavity, 15-cylinder head center hole.
Embodiment
The utility model is described in further detail below in conjunction with concrete drawings and Examples.
As shown in Figure 1, gap buffer oil hydraulic cylinder described in the utility model comprises cylinder barrel 5, piston rod 1 is housed in the cylinder barrel 5, the head end of cylinder barrel 5 is equipped with cylinder head 3, offer rod chamber hydraulic fluid port 4 on the cylinder head 3, cylinder head 3 centers offer cylinder head center hole 15, between the periphery wall of the inner hole wall of cylinder head center hole 15 and piston rod 1 certain interval are arranged, and rod chamber hydraulic fluid port 4 is communicated with the oil hydraulic cylinder rod chamber by cylinder head center hole 15; Gland 2 is housed in the outer end of cylinder head 3, and gland 2 center drillings, the head end of piston rod 1 pass this hole sealed sliding of this Kong Bingyu movingly, and the tail end of piston rod 1 is equipped with piston 7; The tail end of described cylinder barrel 5 is connected with cylinder bottom 9, offers rodless cavity hydraulic fluid port 10 on the cylinder bottom 9, and cylinder bottom 9 centers offer cylinder bottom center hole 11, and rodless cavity hydraulic fluid port 10 is communicated with the oil hydraulic cylinder rodless cavity by cylinder bottom center hole 11.
As shown in Figure 1, the tail end place of described piston rod 1 is provided with the internal diameter of circumferential step 13, the first cushion collars 6 of an annular greater than the external diameter of circumferential step 13, and first cushion collar 6 is sleeved on this circumferential step 13, by piston rod 1 and piston 7 location; The tail end of described piston rod 1 also is equipped with second cushion collar, 8, the second cushion collars 8 by rod end screw thread location; Described first cushion collar 6, second cushion collar 8 lay respectively at the both sides of piston 7, and first cushion collar 6 is positioned at the oil hydraulic cylinder rod chamber, and second cushion collar 8 is positioned at the oil hydraulic cylinder rodless cavity.
As shown in Figure 1, the end of described cylinder head center hole 15 forms a cylinder head buffer cavity 14, and the internal diameter of cylinder head buffer cavity 14 is greater than the external diameter of first cushion collar 6, and cylinder head buffer cavity 14 matches with first cushion collar 6; The end of described cylinder bottom center hole 11 forms a cylinder bottom buffer cavity 12, and the internal diameter of cylinder bottom buffer cavity 12 is greater than the external diameter of second cushion collar 8, and cylinder bottom buffer cavity 12 matches with second cushion collar 8.
Working procedure of the present utility model and working principle are as follows:
During the rodless cavity oil-feed; hydraulic oil enters in the rodless cavity of oil hydraulic cylinder via the rodless cavity hydraulic fluid port 10 on the cylinder bottom 9; promote piston 7 and piston rod 1 to left movement; when piston 7 and piston rod 1 move to terminal left; first cushion collar 6 enters in the cylinder head buffer cavity 14; hydraulic oil is pushed by piston 7; flow out by the annular space between the cylinder head center hole 15 and first cushion collar 6; pressure in the rod chamber on piston 7 left sides is higher than the pressure of the rodless cavity on the right; form certain back pressure; piston 7 and piston rod 1 run slowly, and avoid directly impacting cylinder head 3, play buffer protection function.
During the rod chamber oil-feed; hydraulic oil enters in the rod chamber of oil hydraulic cylinder via the rod chamber hydraulic fluid port 4 on the cylinder head 3; promoting piston 7 and piston rod 1 moves right; when piston 7 and piston rod 1 move to terminal to the right; second cushion collar 8 enters in the cylinder bottom buffer cavity 12; hydraulic oil is pushed by piston 7; flow out by the annular space between the cylinder bottom center hole 11 and second cushion collar 8; pressure in the rodless cavity on piston 7 the right is higher than the pressure of the rod chamber on the left side; form certain back pressure; piston 7 and piston rod 1 run slowly, and avoid directly impacting cylinder bottom 9, play buffer protection function.
Claims (3)
1. gap buffer oil hydraulic cylinder, comprise cylinder barrel (5), piston rod (1) is housed in the cylinder barrel (5), the head end of cylinder barrel (5) is equipped with cylinder head (3), offer rod chamber hydraulic fluid port (4) on the cylinder head (3), cylinder head (3) center offers cylinder head center hole (15), between the periphery wall of the inner hole wall of cylinder head center hole (15) and piston rod (1) certain interval is arranged, and rod chamber hydraulic fluid port (4) is communicated with the oil hydraulic cylinder rod chamber by cylinder head center hole (15); Gland (2) is housed in the outer end of cylinder head (3), and gland (2) center drilling, the head end of piston rod (1) pass this hole sealed sliding of this Kong Bingyu movingly, and the tail end of piston rod (1) is equipped with piston (7); The tail end of described cylinder barrel (5) is connected with cylinder bottom (9), offers rodless cavity hydraulic fluid port (10) on the cylinder bottom (9), and cylinder bottom (9) center offers cylinder bottom center hole (11), and rodless cavity hydraulic fluid port (10) is communicated with the oil hydraulic cylinder rodless cavity by cylinder bottom center hole (11); It is characterized in that, the tail end of described piston rod (1) is equipped with first cushion collar (6) and second cushion collar (8), first cushion collar (6), second cushion collar (8) lay respectively at the both sides of piston (7), first cushion collar (6) is positioned at the oil hydraulic cylinder rod chamber, and second cushion collar (8) is positioned at the oil hydraulic cylinder rodless cavity; The end of described cylinder head center hole (15) forms a cylinder head buffer cavity (14), and the internal diameter of cylinder head buffer cavity (14) is greater than the external diameter of first cushion collar (6), and cylinder head buffer cavity (14) matches with first cushion collar (6); The end of described cylinder bottom center hole (11) forms a cylinder bottom buffer cavity (12), and the internal diameter of cylinder bottom buffer cavity (12) is greater than the external diameter of second cushion collar (8), and cylinder bottom buffer cavity (12) matches with second cushion collar (8).
2. gap buffer oil hydraulic cylinder as claimed in claim 1, its feature also is, the tail end place of described piston rod (1) is provided with the circumferential step (13) of an annular, the internal diameter of first cushion collar (6) is greater than the external diameter of circumferential step (13), first cushion collar (6) is sleeved on this circumferential step (13), by piston rod (1) and piston (7) location.
3. gap buffer oil hydraulic cylinder as claimed in claim 1, its feature are that also the tail end that is sleeved on piston rod (1) of described second cushion collar (8) is located by the rod end screw thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201278257U CN201636116U (en) | 2010-03-10 | 2010-03-10 | Gap cushioning hydraulic cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201278257U CN201636116U (en) | 2010-03-10 | 2010-03-10 | Gap cushioning hydraulic cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201636116U true CN201636116U (en) | 2010-11-17 |
Family
ID=43080607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201278257U Expired - Fee Related CN201636116U (en) | 2010-03-10 | 2010-03-10 | Gap cushioning hydraulic cylinder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201636116U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075385A (en) * | 2011-10-26 | 2013-05-01 | 北京精密机电控制设备研究所 | Electric servo oil cylinder |
| CN103821792A (en) * | 2014-03-14 | 2014-05-28 | 汤海涛 | Stable hydraulic cylinder |
| CN105041769A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Fast-extending and slow-contracting hydraulic cylinder |
| CN105041771A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Hydraulic cylinder of which starting characteristic is straight |
| CN105156399A (en) * | 2015-08-24 | 2015-12-16 | 济南大学 | Self-adaptation sealing, anti-loosening and auxiliary motion device of hydraulic cylinder piston |
| CN108317124A (en) * | 2018-03-11 | 2018-07-24 | 华东交通大学 | A kind of novel high-voltage circuit-breaker hydraulic working cylinder with combined buffer plunger |
| CN110657131A (en) * | 2019-10-03 | 2020-01-07 | 江苏军宏机械有限公司 | Oil outlet mechanism of booster oil cylinder |
| US10738802B2 (en) | 2016-06-16 | 2020-08-11 | Qingdao Acme Innovation Technology Co., Ltd. | Hydraulic buffer and cylinder combined with the same |
| US10962221B2 (en) | 2018-11-13 | 2021-03-30 | Pro-Iroda Industries, Inc. | Flame gun with flow control ring |
| CN113446285A (en) * | 2021-06-30 | 2021-09-28 | 无锡四方友信股份有限公司 | Two-head belt buffer oil cylinder |
-
2010
- 2010-03-10 CN CN2010201278257U patent/CN201636116U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075385A (en) * | 2011-10-26 | 2013-05-01 | 北京精密机电控制设备研究所 | Electric servo oil cylinder |
| CN103821792A (en) * | 2014-03-14 | 2014-05-28 | 汤海涛 | Stable hydraulic cylinder |
| CN105156399A (en) * | 2015-08-24 | 2015-12-16 | 济南大学 | Self-adaptation sealing, anti-loosening and auxiliary motion device of hydraulic cylinder piston |
| CN105041769A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Fast-extending and slow-contracting hydraulic cylinder |
| CN105041771A (en) * | 2015-08-29 | 2015-11-11 | 济南大学 | Hydraulic cylinder of which starting characteristic is straight |
| US10738802B2 (en) | 2016-06-16 | 2020-08-11 | Qingdao Acme Innovation Technology Co., Ltd. | Hydraulic buffer and cylinder combined with the same |
| CN108317124A (en) * | 2018-03-11 | 2018-07-24 | 华东交通大学 | A kind of novel high-voltage circuit-breaker hydraulic working cylinder with combined buffer plunger |
| US10962221B2 (en) | 2018-11-13 | 2021-03-30 | Pro-Iroda Industries, Inc. | Flame gun with flow control ring |
| CN110657131A (en) * | 2019-10-03 | 2020-01-07 | 江苏军宏机械有限公司 | Oil outlet mechanism of booster oil cylinder |
| CN113446285A (en) * | 2021-06-30 | 2021-09-28 | 无锡四方友信股份有限公司 | Two-head belt buffer oil 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20180310 |