CN201621129U - Single-acting plunger type buffering hydraulic oil cylinder - Google Patents
Single-acting plunger type buffering hydraulic oil cylinder Download PDFInfo
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- CN201621129U CN201621129U CN2010201239534U CN201020123953U CN201621129U CN 201621129 U CN201621129 U CN 201621129U CN 2010201239534 U CN2010201239534 U CN 2010201239534U CN 201020123953 U CN201020123953 U CN 201020123953U CN 201621129 U CN201621129 U CN 201621129U
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Abstract
The utility model discloses a single-acting plunger type buffering hydraulic oil cylinder comprising a cylinder body, a piston and a plunger rod, wherein the lower part of the cylinder body is a cylinder bottom; an oil chamber is arranged between the cylinder bottom and the piston; an oil port passes through from the cylinder bottom and is communicated with the oil chamber; a valve plug which is capable of reciprocating in the piston and limited is arranged; the valve plug is provided with a plurality of radial holes; and the radial holes are communicated with the oil chamber and the oil port. The oil cylinder avoids the impact of the piston body on the cylinder bottom, and simultaneously avoids shudder caused by the intense collision of a secondary dodge gate frame and a primary fixed gate frame, thus ensuring the strength and the smooth working of the hydraulic oil cylinder and a whole hydraulic system of a forklift.
Description
Technical field:
The utility model relates to a kind of oil cylinder, specifically a kind of single-acting plunger type buffering hydraulic oil cylinder.
Background technique:
It is the single-acting plunger type oil hydraulic cylinder that present fork truck two-stage door frame freely promotes main lift oil tank, in conjunction with Fig. 1, oil cylinder comprises cylinder body 1, plunger rod 2, piston 3, we hoist the oil hydraulic cylinder process that hoists plunger rod 2 process of stretching out hereinafter to be referred as oil cylinder, the process that plunger rod is withdrawn into cylinder body descends hereinafter to be referred as oil cylinder oil hydraulic cylinder decline process.In conjunction with Fig. 2, it is to realize like this that oil cylinder hoists, hydraulic oil enters in the oil pocket 6 from the hydraulic fluid port 5 of cylinder bottom 4, by pressure with piston 3 and plunger rod 2 jack-up, as shown in Figure 1, when piston 3 descends, at plunger rod, descend with certain acceleration under the action of gravity of door frame and goods, near cylinder base the time with the speed of about 400mm/s and inertia impact cylinder bottom greatly, piston and oil cylinder cylinder bottom, movable door frame of secondary and one-level fixedly door frame can produce strong bump, and cause that fork truck trembles, will inevitably have a strong impact on the intensity and the proper functioning of hydraulic jack and whole hydraulic system.
The model utility content:
For overcoming the defective of prior art, the purpose of this utility model is to provide a kind of single-acting plunger type buffering hydraulic oil cylinder, can slow down the impact of piston to cylinder bottom, plays the effect of bumper and absorbing shock, has improved the reliability of hydraulic jack.
The utility model technical solution problem adopts following technological scheme:
Single-acting plunger type buffering hydraulic oil cylinder, comprise cylinder body, the piston that can in cylinder body, move reciprocatingly and the plunger rod that forms a fixed connection and be synchronized with the movement with described piston, the bottom of cylinder body is a cylinder bottom, be made as oil pocket between cylinder bottom and the piston, hydraulic fluid port connects from cylinder bottom and is communicated with described oil pocket, setting can be in described piston to-and-fro motion and limited spool, described spool offers a plurality of radial holes, described radial hole and described oil pocket and the perforation of described hydraulic fluid port.
Structural feature of the present utility model also is:
Described spool is located in the center hole of described piston, and the outer wall of spool and piston center hole inwall are provided with seal ring, also is provided with baffle ring at the outer wall that is positioned at the spool above the described seal ring.
The lower end of described spool is step axle construction, and promptly the external diameter of spool lower end is bigger than middle part external diameter, and the middle part of described spool is socketed with spring, and the upper end of described spring is a spring seat with described seal ring, and the lower end is a spring seat with the step surface of described step axle.
Described a plurality of radial hole is axially equidistantly arranged along spool, and the aperture of a plurality of radial holes is and reduces trend from top to bottom.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
The utility model has been set up spool in the center hole of cylinder piston, when piston and plunger rod finished promote action after, when piston is descending rapidly, it at first is the bottom contact cylinder bottom of spool, around the spool bottom shutoff hydraulic fluid port, make the interior hydraulic oil of oil pocket to flow to hydraulic fluid port through valve core cavity and carry out oil return from the radial hole (throttle orifice) of spool, oil in the oil pocket forms the immense pressure opposing impact force that descent of piston produced like this, the speed of descent of piston is slowed down gradually, play good buffer function.When spool contacts with cylinder bottom, promptly produce relative movement between spool and the piston, at first the spring of the outer socket of spool can be offset the part impact force of piston, has finished first-level buffer; The aperture of the radial hole of offering on the spool (throttle orifice) diminishes from top to bottom gradually, piston at first seals radial hole topmost, make that the oil return speed of oil pocket is slack-off, enclosed radical hole one by one from top to bottom again, and more down radial hole is more little, that is to say, piston is descending, the speed of oil return is slow more in the oil pocket, finish secondary, three grades, multi-buffer has guaranteed that piston is smooth-going, the impact of piston body to cylinder bottom avoided in the falling of decrease of speed formula, avoided simultaneously the movable door frame of secondary and one-level fixedly door frame guaranteed the intensity and the smooth working of fork truck hydraulic jack and whole hydraulic system because of clashing into trembling of causing strongly.
Description of drawings:
Fig. 1 is the structural representation (wherein piston is in the falling state) of existing oil cylinder; Fig. 2 is the structural representation (wherein piston is the lifting state) of existing oil cylinder; Fig. 3 is the structural representation (wherein piston is the lifting state) of the utility model oil cylinder; Fig. 4 is the structural representation (wherein piston is in the falling state) of the utility model oil cylinder.
Number in the figure: 1 cylinder body, 2 plunger rods, 3 pistons, 4 cylinder bottoms, 5 hydraulic fluid ports, 6 oil pockets, 7 spools, 8 springs, 9 baffle rings, 10 seal rings, 11 radial holes.
Below pass through embodiment, and the utility model is described in further detail in conjunction with the accompanying drawings.
Embodiment:
Embodiment: in conjunction with Fig. 3, the plunger type buffering hydraulic oil cylinder of present embodiment, comprise cylinder body 1, piston 3, plunger rod 2 is connected the upper end of piston 3 to drive external agency's motion, hydraulic oil enters in the oil pocket 6 from the hydraulic fluid port 5 of cylinder bottom 4, it is up that generation pressure orders about piston 3, finish and promote action, simultaneously spool 7 under the active force of its external springs 8 with piston stroking upward, baffle ring 9 contacts formation with seal ring 10 spacing, avoid spool 7 to break away from piston 3, after lifting work is finished, shown in Figure 4, pallet fork externally, under the action of gravity of door frame and plunger rod etc., piston 3 is descending rapidly in cylinder body 1, hydraulic oil in the oil pocket 6 refluxes rapidly from hydraulic fluid port 5, behind the bottom of spool 7 contact cylinder bottom 4 just shutoff hydraulic fluid port 5, hydraulic oil in the oil pocket 6 can only flow to hydraulic fluid port 5 from the radial hole 11 of spool, the rising of oil pocket internal pressure forms the reaction force to piston 3, spring 8 is compressed the reaction force that also forms piston simultaneously, make piston 3 deceleration buffers, continue when descending at piston, just seal the radial hole 11 on the spool 7 one by one, make the oil return speed of oil pocket 6 slack-off gradually, the reaction force that the piston lower end produces is also increasing gradually, rate of descent is progressively slack-off, plays infinite variable speed cushioning effect, has eliminated the impact of piston to cylinder bottom, also avoided the movable door frame of secondary and one-level fixedly door frame improved the reliability of hydraulic jack because of clashing into trembling of causing strongly.
Claims (4)
1. single-acting plunger type buffering hydraulic oil cylinder, piston (3) that comprise cylinder body (1), can in cylinder body, move reciprocatingly and the plunger rod (2) that forms a fixed connection and be synchronized with the movement with described piston, the bottom of cylinder body is cylinder bottom (4), be made as oil pocket (6) between cylinder bottom and the piston, hydraulic fluid port (5) connects from cylinder bottom and is communicated with described oil pocket (6), it is characterized in that, setting can be in described piston to-and-fro motion and limited spool (7), described spool offers a plurality of radial holes (11), and described radial hole (11) connects with described oil pocket (6) and described hydraulic fluid port (5).
2. single-acting plunger type buffering hydraulic oil cylinder according to claim 1, it is characterized in that, described spool (7) is located in the center hole of described piston (3), the outer wall of spool and piston center hole inwall are provided with seal ring (10), also are provided with baffle ring (9) at the outer wall that is positioned at the spool above the described seal ring.
3. single-acting plunger type buffering hydraulic oil cylinder according to claim 2, it is characterized in that, the lower end of described spool (7) is step axle construction, the external diameter that is the spool lower end is bigger than middle part external diameter, the middle part of described spool is socketed with spring (8), the upper end of described spring is a spring seat with described seal ring (10), and the lower end is a spring seat with the step surface of described step axle.
4. single-acting plunger type buffering hydraulic oil cylinder according to claim 1 is characterized in that, described a plurality of radial holes (11) are axially equidistantly arranged along spool (7), and the aperture of a plurality of radial holes is and reduces trend from top to bottom.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201239534U CN201621129U (en) | 2010-03-04 | 2010-03-04 | Single-acting plunger type buffering hydraulic oil cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201239534U CN201621129U (en) | 2010-03-04 | 2010-03-04 | Single-acting plunger type buffering hydraulic oil cylinder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201621129U true CN201621129U (en) | 2010-11-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201239534U Expired - Fee Related CN201621129U (en) | 2010-03-04 | 2010-03-04 | Single-acting plunger type buffering hydraulic oil cylinder |
Country Status (1)
| Country | Link |
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| CN (1) | CN201621129U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102991692A (en) * | 2012-10-15 | 2013-03-27 | 蒂森克虏伯机场***(中山)有限公司 | Boarding bridge lifting device |
| CN103452944A (en) * | 2013-08-23 | 2013-12-18 | 浙江亿太诺气动科技有限公司 | Vehicle-carried single-acting cylinder |
| CN104806602A (en) * | 2015-04-29 | 2015-07-29 | 宁波储力叉车有限公司 | Buffering device for oil cylinder |
| CN106151160A (en) * | 2015-04-28 | 2016-11-23 | 徐工集团工程机械股份有限公司 | There is hydraulic jack and the excavator of pooling feature |
-
2010
- 2010-03-04 CN CN2010201239534U patent/CN201621129U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102991692A (en) * | 2012-10-15 | 2013-03-27 | 蒂森克虏伯机场***(中山)有限公司 | Boarding bridge lifting device |
| CN102991692B (en) * | 2012-10-15 | 2015-02-18 | 蒂森克虏伯机场***(中山)有限公司 | Boarding bridge lifting device |
| CN103452944A (en) * | 2013-08-23 | 2013-12-18 | 浙江亿太诺气动科技有限公司 | Vehicle-carried single-acting cylinder |
| CN103452944B (en) * | 2013-08-23 | 2016-04-06 | 浙江亿太诺气动科技有限公司 | A kind of vehicle-mounted single-acting cylinder |
| CN106151160A (en) * | 2015-04-28 | 2016-11-23 | 徐工集团工程机械股份有限公司 | There is hydraulic jack and the excavator of pooling feature |
| CN106151160B (en) * | 2015-04-28 | 2018-05-01 | 徐工集团工程机械股份有限公司 | Hydraulic cylinder and excavator with pooling feature |
| CN104806602A (en) * | 2015-04-29 | 2015-07-29 | 宁波储力叉车有限公司 | Buffering device for oil cylinder |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HEFEI LIHENG HYDRAULIC SYSTEM CO., LTD. Free format text: FORMER OWNER: HEFEI LIHENG TECHNOLOGY CO., LTD. Effective date: 20110921 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 230088 HEFEI, ANHUI PROVINCE TO: 230061 HEFEI, ANHUI PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20110921 Address after: 230061, Hefei 622, Mount Huangshan Road, Anhui Province Information Industry Park integrated service center room 326 Patentee after: Hefei Liheng Hydraulic System Co., Ltd. Address before: 230088 Yang Linlu, mechanical and Electrical Industrial Park, Hefei hi tech Zone, Anhui Patentee before: Hefei Liheng Technology Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101103 Termination date: 20170304 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |