CN103615432A - Buffering structure for forklift lifting oil cylinder - Google Patents
Buffering structure for forklift lifting oil cylinder Download PDFInfo
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- CN103615432A CN103615432A CN201310677727.9A CN201310677727A CN103615432A CN 103615432 A CN103615432 A CN 103615432A CN 201310677727 A CN201310677727 A CN 201310677727A CN 103615432 A CN103615432 A CN 103615432A
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Abstract
A buffering structure for a forklift lifting oil cylinder comprises a cylinder barrel. The two ends of the cylinder barrel are provided with an end cover and a cylinder bottom respectively. The buffering structure further comprises a piston rod. The piston rod penetrates into the cylinder barrel from a through hole formed in the middle of the end cover. A piston is arranged at the end portion, inside the cylinder barrel, of the piston rod. A stair-shaped center hole is formed in the piston. A buffering sleeve is arranged in the stair-shaped hole in the bottom of the piston. A buffering shaft sleeve coaxial with the buffeting sleeve is arranged on the corresponding cylinder bottom. The buffering shaft sleeve is embedded in the cylinder bottom. By means of the structure, the buffering sleeve and the buffering shaft sleeve are arranged on the piston and the cylinder bottom respectively, the design space is saved, the structure of the oil cylinder is more compact, and meanwhile the buffering effect can be changed by replacing the buffering sleeve and adjusting the size of a gap formed between the buffering sleeve and the buffering shaft sleeve.
Description
Technical field
The present invention relates to a kind of oil cylinder, the lower buffer lift oil cylinder New Buffering structure that particularly a kind of forklift lifting is used.
Background technique
When fork truck lifting oil cylinder is worked, velocity of piston is higher, and cargo mass is larger, can when stroke end, form larger impulsive load, with cylinder bottom or cylinder cap generation mechanical collision, cause impact shock and noise, even damage oil cylinder, therefore oil cylinder design damping device is essential.Conventionally under lift oil tank, buffering has two kinds of valve buffering and gap buffers.There is following defect in its buffer structure: one, valve buffering cost (comprising cost of material and processing cost) is higher; Two, valve inner spring easily lost efficacy, valve job insecurity; Three, the design space of valve buffer structure is larger; Four, gap buffer is because the coaxality between the gentle punching cover of buffering axle sleeve is bad, easily stuck in working procedure.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of more rational fork truck lifting oil cylinder buffer structure, and this buffer structure has the following advantages: one, lower compared with valve buffering cost (comprising cost of material and processing cost); Two, efficiently solve gap buffer cushion collar and a buffering axle sleeve out-of-alignment difficult problem; Three, working stability, good buffer effect; Four, installing/dismounting is more convenient.
For solving the problems of the technologies described above, the invention provides fork truck lifting oil cylinder buffer structure, comprise cylinder barrel, cylinder barrel two ends are respectively equipped with end cap, cylinder bottom, also comprise a piston rod, in the middle through-hole of described piston rod by end cap, penetrate in cylinder barrel, and the piston rod end in cylinder barrel is provided with piston, it is characterized in that: described piston is provided with stair-stepping center hole, in the shoulder hole of piston base, be provided with cushion collar, on corresponding cylinder bottom, be provided with coaxial buffering axle sleeve, described buffering axle sleeve is embedded in cylinder bottom portion.
Described buffer structure and in the past valve buffer structure are distinguished mainly: this structure is contained in cushion collar and buffering axle sleeve respectively on piston and cylinder bottom, has saved design space, and cylinder structure is compacter; And can be by exchange buffering cover, thereby the gap length of adjusting between cushion collar and buffering axle sleeve changes cushioning effect.
Described cushion collar is fixed in the center hole of piston by jump ring.
In the shoulder hole of the piston inside cushion collar, be also provided with one-way valve, described one-way valve comprises a valve pocket being located in shoulder hole, in valve pocket, be provided with a spool sealing by cone match, described spool is resisted against by spring on the valve gap of valve pocket end, and described one-way valve is fixed in the center hole of piston by the baffle plate of cushion collar inner side.
By buffer structure, can effectively improve shock-absorbing capacity, avoid in processing technology, higher and complicated defect and the easy defect losing efficacy of spring of machining accuracy that valve pocket, spool and the spring of valve buffering requires; Buffer unit structure of the present invention is simple, compared with valve buffering machining accuracy, reduces and easily processing.
Accompanying drawing explanation
Fig. 1 is that fork truck lifting oil cylinder buffer structure is used schematic diagram.
Embodiment
Below by mode of execution and accompanying drawing, this structure is described in further detail:
Referring to Fig. 1, this fork truck lifting oil cylinder buffer structure comprises the cylinder barrel 6 with oilhole, cylinder barrel 6 one end are threaded connection end cap 4, on the end cap outer circumferential face of end cap 4 screw thread tops and bottom, being provided with two seals circle coordinates with cylinder barrel 6, cylinder barrel 6 the other ends are by being welded to connect cylinder bottom 14, cylinder bottom 14 offers oilhole and the inner UNICOM of cylinder barrel 6
Also comprise a piston rod 1, in the middle through-hole of piston rod 1 by end cap 4, penetrate in cylinder barrel 6, on the fitting surface of end cap 4 and piston rod 1, by outside to inner side, be provided with successively dust ring 2, primary seal circle 3, composite bush 5 is for dustproof, sealing, guiding, piston rod 1 end in cylinder barrel 6 is provided with piston 8, described piston 8 is multidiameter shaft shape, middle part is provided with shoulder hole, on the end face of piston rod 1, be provided with blind hole, described piston 8 is arranged in the blind hole of piston rod 1 by jump ring, at the outer circumferential face of piston 8, be provided with primary seal 16 and support ring 15 coordinates with cylinder barrel 6, on the piston rod 1 of 4 of piston 8 and end caps, be provided with stop collar 7,
In the shoulder hole of described piston 8 piston 8 one sides corresponding with cylinder bottom 14 fitting surfaces, be provided with cushion collar 12, described cushion collar 12 is fixed in the center hole of piston 8 by jump ring, on corresponding cylinder bottom 14, be provided with coaxial buffering axle sleeve 13, described buffering axle sleeve 13 is embedded in cylinder bottom 14, and described buffering axle sleeve 13 can lead to interference fit and be arranged on cylinder bottom 14;
In the shoulder hole of the piston 8 of cushion collar 12 inner sides, be also provided with one-way valve, described one-way valve comprises a valve pocket 9 being located in shoulder hole, the outer circumferential face of valve pocket 9 is provided with one O RunddichtringO and coordinates with the shoulder hole inner peripheral surface of piston 8, in described valve pocket 9, be provided with a spool sealing by cone match 10, on the conical surface of spool 10, being provided with O RunddichtringO seals, in valve pocket 9 one sides near cushion collar, be provided with valve gap 18, valve gap 18 is provided with center hole and coordinates with spool 10, at center hole, within one week, be also provided with a circle oilhole, described spool 10 is resisted against on the valve gap 18 of valve pocket 9 ends by spring 11, described one-way valve is fixed in the center hole of piston by the baffle plate 17 of cushion collar inner side.
The cushioning principle of this buffer structure is as follows:
In oilhole in cylinder barrel 6, pass into high pressure oil, oilhole on cylinder bottom 14 takes back fuel tank, Action of Gravity Field lower piston 8 and piston rod 1 at the weight that hoists move to cylinder bottom, 14 low pressure oil of piston 8 and cylinder bottom are got back in oil sump tank by the oilhole on buffering axle sleeve 13 and cylinder bottom 14, when piston 8 approaches on cylinder bottom 14, first buffering axle sleeve 13 coordinates with cushion collar 12, oil return cross section is reduced, 14 of piston 8 and cylinder bottoms, form return pressure and form compensator or trimmer pressure, play buffer function, simultaneously because rod chamber in oil cylinder running exists air, in oil cylinder hoists process, air compressing forms high pressure, overpressure may be damaged Sealing, settle one-way valve, when overpressure is greater than one-way valve cracking pressure, one-way valve work, plays exhaust pressure relief effect.
This structure is contained in cushion collar 12 and buffering axle sleeve 13 respectively on piston 8 and cylinder bottom 14, has saved design space, and cylinder structure is compacter; And can overlap 12 by exchange buffering, thereby the gap length of adjusting between cushion collar 12 and buffering axle sleeve 13 changes cushioning effect.
Above-described is only one embodiment of the present invention.It should be pointed out that for the person of ordinary skill of the art, under the premise without departing from the principles of the invention, can also make apparent some conversion or substitute and remodeling, these also should be considered as belonging to protection scope of the present invention.
Claims (3)
1. fork truck lifting oil cylinder buffer structure, comprise cylinder barrel, cylinder barrel two ends are respectively equipped with end cap, cylinder bottom, also comprise a piston rod, in the middle through-hole of described piston rod by end cap, penetrate in cylinder barrel, and the piston rod end in cylinder barrel is provided with piston, it is characterized in that: described piston is provided with stair-stepping center hole, in the shoulder hole of piston base, be provided with cushion collar, be provided with coaxial buffering axle sleeve on corresponding cylinder bottom, described buffering axle sleeve is embedded in cylinder bottom portion.
2. fork truck lifting oil cylinder buffer structure according to claim 1, is characterized in that: described cushion collar is fixed in the center hole of piston by jump ring.
3. fork truck lifting oil cylinder buffer structure according to claim 1 and 2, it is characterized in that: in the shoulder hole of the piston inside cushion collar, be also provided with one-way valve, described one-way valve comprises a valve pocket being located in shoulder hole, in valve pocket, be provided with a spool sealing by cone match, described spool is resisted against by spring on the valve gap of valve pocket end, and described one-way valve is fixed in the center hole of piston by the baffle plate of cushion collar inner side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310677727.9A CN103615432B (en) | 2013-12-13 | 2013-12-13 | Fork truck lifting oil cylinder buffer structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310677727.9A CN103615432B (en) | 2013-12-13 | 2013-12-13 | Fork truck lifting oil cylinder buffer structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103615432A true CN103615432A (en) | 2014-03-05 |
| CN103615432B CN103615432B (en) | 2016-08-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310677727.9A Active CN103615432B (en) | 2013-12-13 | 2013-12-13 | Fork truck lifting oil cylinder buffer structure |
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| CN (1) | CN103615432B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104528599A (en) * | 2014-11-13 | 2015-04-22 | 安徽乐库智能停车设备有限公司 | Safe and wear-resistant oil supply system of lifting device |
| CN105041781A (en) * | 2015-06-26 | 2015-11-11 | 北京航空航天大学 | Simulation realization method of hydraulic cylinder with irregular tail end buffering mechanism |
| CN105134688A (en) * | 2015-08-21 | 2015-12-09 | 蚌埠液力机械有限公司 | Novel buffer type forklift two-section full-freedom oil cylinder |
| CN105443491A (en) * | 2015-12-07 | 2016-03-30 | 柳州柳工液压件有限公司 | Forklift lifting oil cylinder |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1332494A (en) * | 1969-11-07 | 1973-10-03 | Monsun Tison Ab | Cushioning device in a fluid-operated piston and cylinder device |
| DE29903938U1 (en) * | 1999-03-04 | 1999-05-27 | Festo Ag & Co | Fluid operated cylinder with end position damping device |
| CN201396336Y (en) * | 2009-03-26 | 2010-02-03 | 杭州西子船舶液压工程机械有限公司 | Lifting cylinder with buffer device for forklift truck |
| CN102369360A (en) * | 2009-04-02 | 2012-03-07 | 萱场工业株式会社 | Hydraulic cylinder |
| CN202301285U (en) * | 2011-09-19 | 2012-07-04 | 郭世杰 | Six-degree-of-freedom hydraulic servo cylinder with bidirectional buffering effect |
| CN202418092U (en) * | 2012-02-10 | 2012-09-05 | 合肥力恒液压系统有限公司 | Single action piston lifting buffer hydraulic cylinder |
| CN203223438U (en) * | 2013-03-22 | 2013-10-02 | 山东众力液压技术有限公司 | Piston type single-action hydraulic cylinder |
| CN103359660A (en) * | 2012-03-26 | 2013-10-23 | 株式会社伊丹精机 | Lifting hydraulic cylinder and forklift having the same |
| CN203604336U (en) * | 2013-12-13 | 2014-05-21 | 蚌埠液力机械有限公司 | Buffering structure of lifting cylinder of forklift |
-
2013
- 2013-12-13 CN CN201310677727.9A patent/CN103615432B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1332494A (en) * | 1969-11-07 | 1973-10-03 | Monsun Tison Ab | Cushioning device in a fluid-operated piston and cylinder device |
| DE29903938U1 (en) * | 1999-03-04 | 1999-05-27 | Festo Ag & Co | Fluid operated cylinder with end position damping device |
| CN201396336Y (en) * | 2009-03-26 | 2010-02-03 | 杭州西子船舶液压工程机械有限公司 | Lifting cylinder with buffer device for forklift truck |
| CN102369360A (en) * | 2009-04-02 | 2012-03-07 | 萱场工业株式会社 | Hydraulic cylinder |
| CN202301285U (en) * | 2011-09-19 | 2012-07-04 | 郭世杰 | Six-degree-of-freedom hydraulic servo cylinder with bidirectional buffering effect |
| CN202418092U (en) * | 2012-02-10 | 2012-09-05 | 合肥力恒液压系统有限公司 | Single action piston lifting buffer hydraulic cylinder |
| CN103359660A (en) * | 2012-03-26 | 2013-10-23 | 株式会社伊丹精机 | Lifting hydraulic cylinder and forklift having the same |
| CN203223438U (en) * | 2013-03-22 | 2013-10-02 | 山东众力液压技术有限公司 | Piston type single-action hydraulic cylinder |
| CN203604336U (en) * | 2013-12-13 | 2014-05-21 | 蚌埠液力机械有限公司 | Buffering structure of lifting cylinder of forklift |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104528599A (en) * | 2014-11-13 | 2015-04-22 | 安徽乐库智能停车设备有限公司 | Safe and wear-resistant oil supply system of lifting device |
| CN105041781A (en) * | 2015-06-26 | 2015-11-11 | 北京航空航天大学 | Simulation realization method of hydraulic cylinder with irregular tail end buffering mechanism |
| CN105134688A (en) * | 2015-08-21 | 2015-12-09 | 蚌埠液力机械有限公司 | Novel buffer type forklift two-section full-freedom oil cylinder |
| CN105443491A (en) * | 2015-12-07 | 2016-03-30 | 柳州柳工液压件有限公司 | Forklift lifting oil cylinder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103615432B (en) | 2016-08-17 |
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