CN107165886B - The external buffer structure of angling cylinder - Google Patents

The external buffer structure of angling cylinder Download PDF

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Publication number
CN107165886B
CN107165886B CN201710550944.XA CN201710550944A CN107165886B CN 107165886 B CN107165886 B CN 107165886B CN 201710550944 A CN201710550944 A CN 201710550944A CN 107165886 B CN107165886 B CN 107165886B
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China
Prior art keywords
cylinder
oil
buffer
buffer plunger
plunger
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CN201710550944.XA
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Chinese (zh)
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CN107165886A (en
Inventor
王鹏
张青山
褚金虎
晁代勇
杨静
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Xuzhou XCMG Hydraulics Co Ltd
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Xuzhou XCMG Hydraulics Co Ltd
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Priority to CN201710550944.XA priority Critical patent/CN107165886B/en
Publication of CN107165886A publication Critical patent/CN107165886A/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08Characterised by the construction of the motor unit
    • F15B15/14Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423Component parts; Constructional details
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20Other details, e.g. assembly with regulating devices
    • F15B15/22Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F15B15/227Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke having an auxiliary cushioning piston within the main piston or the cylinder end face

Abstract

The invention belongs to hydraulic cylinder technical fields, more particularly to a kind of external buffer structure of angling cylinder, including cylinder barrel, cylinder bottom, piston rod, buffer plunger and buffering ring, the buffer plunger pass through cylinder bottom on through-hole I stretch into piston rod to T-shaped hole in, buffer plunger be threadedly coupled with cylinder bottom and with piston rod clearance fit;The buffering ring is located in the exit orifice of T-shaped hole and can be moved axially along buffer plunger, and the baffle ring limited to buffering ring is additionally provided in the exit orifice of T-shaped hole, has axial gap between buffering ring and baffle ring, several through-holes II is uniformly provided on the circumference of buffering ring;Oil connection is equipped between the buffer plunger and cylinder bottom outer surface, oil connection is sleeved on buffer plunger, and buffer plunger is equipped with axial oil duct and radial direction oil, the radial direction oil are connected to the oilhole on oil connection.This external structure design convenient disassembly, is conducive to the adjustment of repair and cushion performance, and reduces difficulty of processing, easy to manufacture.

Description

The external buffer structure of angling cylinder
Technical field
The invention belongs to hydraulic cylinder technical fields, and in particular to a kind of external buffer structure of angling cylinder.
Background technology
Angling cylinder is installed on host and plays steering-effecting, and since host is rigid limit, cylinder action impact is apparent, influences Host Security and operating comfort then propose high requirement to angling cylinder cushion performance.
Existing buffer structure is built-in, and this buffer structure is designed in oil cylinder, causes to delay in oil cylinder frequent movement When rushing structural failure, needing to dismantle cylinder body could be replaced, this has resulted in great maintenance difficulty, increases later period maintenance Cost.In addition to this, built-in buffer structure is designed inside oil cylinder, is often resulted in oil cylinder volume and is become larger, and is existed apparent Space waste problem increases the flat cost of oil cylinder.
Invention content
Place in order to overcome the above-mentioned deficiencies of the prior art, the present invention provide a kind of external buffer structure of angling cylinder.
The present invention is achieved through the following technical solutions:The external buffer structure of angling cylinder, including cylinder barrel, be fixed on Cylinder bottom, piston rod, piston, buffer plunger and the buffering ring of cylinder barrel end, piston rod are located in cylinder barrel, and piston is fixed on piston rod Close to cylinder bottom side end, the buffer plunger pass through cylinder bottom on through-hole I stretch into piston rod to T-shaped hole in, buffering Plunger be threadedly coupled with cylinder bottom and with piston rod clearance fit;The buffering ring is located in the exit orifice of T-shaped hole and can be along slow Plunger axial movement is rushed, the exit orifice is the large hole of T-shaped hole, and exit orifice is located at the outside of piston rod, in the exit orifice of T-shaped hole It is additionally provided with the baffle ring limited to buffering ring, has axial gap between buffering ring and baffle ring, is uniformly provided on the circumference of buffering ring Several through-holes II;Oil connection is equipped between the buffer plunger and cylinder bottom outer surface, oil connection is sleeved on buffer plunger On, buffer plunger is equipped with axial oil duct and radial direction oil, axial oil duct are connected with radial direction oil, the radial direction oil with Oilhole connection on oil connection.
Further, be equipped between the buffer plunger and oil connection and between oil connection and cylinder bottom sealing ring into Row sealing.
Further, the baffle ring is elastic spring.
Further, the axial oil duct is round oil hole or rectangle oil hole.
Further, the radial direction oil extends radially through the buffer plunger.
Further, the radial direction oil is round oil hole or rectangle oil hole.
Further, the buffer plunger is equipped with annular groove at the excircle where radial direction oil.
Further,:The buffer plunger is equipped with annular groove at the excircle where radial direction oil.
Further, four through-holes II are uniformly provided on the circumference of the buffering ring.
Further, the cylinder bottom is sealed between cylinder bottom and cylinder barrel equipped with sealing ring with cylinder barrel using being threadedly coupled.
The invention discloses a kind of external buffer structures of angling cylinder, including cylinder barrel, cylinder bottom, piston rod, buffering ring, gear Circle, buffer plunger and oil connection.Buffering ring and baffle ring are assemblied in finished piston rod T shape endoporus, and buffer plunger passes through oil Pipe fitting is connected through a screw thread and is combined together with cylinder bottom, and with piston rod clearance fit, formed visible outer outside a kind of oil cylinder Set buffer structure.
The beneficial effects of the invention are as follows:This buffer structure is matched by piston rod T shapes endoporus and buffering ring and buffer plunger It closes, forms a kind of hydraulic cushion structure, solve the action impact during cylinder action, improve host comfort level and action Continuity, avoids hydraulic shock when piston rod is withdrawn, and this external buffer structure also saves space, solves product Space waste;Meanwhile buffer plunger is that drainback passage is used as buffer unit again.This external structure design convenient disassembly, Be conducive to repair and the adjustment of cushion performance, and reduce difficulty of processing, it is easy to manufacture.
Description of the drawings
Fig. 1 is schematic structural view of the invention;
Fig. 2 is inventive piston rod structure schematic diagram;
Fig. 3 is oil connection structural front view of the present invention;
Fig. 4 is the left view of oil connection of the present invention;
Fig. 5 is buffer plunger structural schematic diagram of the present invention;
Fig. 6 is buffering ring structural front view of the present invention;
Fig. 7 is the left view of buffering ring of the present invention;
In figure, 1, cylinder barrel, 2, piston rod, 2-1, T-shaped hole, 2-2, exit orifice, 2-3, circlip groove, 3, piston, 4, cylinder bottom, 4-1, Through-hole I, 5, oil connection, 5-1, oilhole, 6, buffer plunger, 6-1, axial oil duct, 6-2, radial direction oil, 6-3, annular groove, 7, Baffle ring, 8, buffering ring, 8-1, through-hole II.
Specific implementation mode
Below according to drawings and examples, the present invention is further described.
As shown in Figures 1 to 7, the external buffer structure of a kind of angling cylinder, including cylinder barrel 1, it is fixed on 1 end of cylinder barrel Cylinder bottom 4, piston rod 2, piston 3, buffer plunger 6 and buffering ring 8, piston rod 2 are located in cylinder barrel 1, and piston 3 is fixed on piston rod 2 The end of close 4 side of cylinder bottom is simultaneously fitted close with cylinder barrel 1, and end of the piston rod 2 equipped with 3 side of piston is provided with axial T The cylinder bottom 4 of shape hole 2-1, hydraulic cylinder are equipped with I 4-1 of through-hole, and the buffer plunger 6 passes through I 4-1 of through-hole on cylinder bottom 4 to stretch into In the axial T-shaped hole 2-1 of piston rod 2, buffer plunger 6, using being threadedly coupled, stretches into piston rod 2 with I 4-1 of through-hole on cylinder bottom 4 Buffer plunger 6 and the T-shaped hole 2-1 clearance fits of piston rod 2 in axial T-shaped hole 2-1 form oil duct;The buffering ring 8 It can move axially in the exit orifice 2-2 of T-shaped hole 2-1 and along buffer plunger 6, inner ring and 6 gap of buffer plunger of buffering ring 8 Coordinate, the outer shroud of buffering ring 8 and the hole wall clearance fit of T-shaped hole 2-1, circlip groove 2- is additionally provided in the exit orifice 2-2 of T-shaped hole 2-1 It is placed with the baffle ring 7 limited to buffering ring 8 in 3, circlip groove 2-3, has axial gap between buffering ring 8 and baffle ring 7 so that is slow Rushing ring 8 can and can only move axially between the ladder retaining wall and baffle ring 7 of T-shaped hole 2-1, on the circumference of buffering ring 8 uniformly Equipped with II 8-1 of several through-holes;Oil connection 5 is equipped between 4 outer surface of buffer plunger 6 and cylinder bottom, oil connection 5 is set with On buffer plunger 6, buffer plunger 6 is equipped with axial direction oil duct 6-1 and radial direction oil 6-2, the radial direction oil 6-2 and oil pipe Oilhole 5-1 connections on connector 5, oilhole 5-1 is connected by oil pipe with fuel tank, between the buffer plunger 6 and oil connection 5 And it is equipped with sealing ring between oil connection 5 and cylinder bottom 4 and is sealed the normal work for preventing oil leak and influencing hydraulic cylinder. When the piston rod 2 of the present invention recycles, so that buffering ring 8 is pressed in the rank of T-shaped hole 2-1 on piston rod 2 under the action of hydraulic oil On terraced hole wall so that II 8-1 of through-hole on buffering ring 8 cannot be excessively oily, and hydraulic oil can only pass through the inner ring and bumper post of buffering ring 8 The gap between 6 outer circles is filled in, restriction effect is generated, to generate cushioning effect, fluid is eventually by the axial oil duct of buffer plunger 6 Oilhole 5-1 on 6-1 and radial direction oil 6-2 and oil connection 5 flows back into fuel tank, and wherein buffer plunger 6 is drainback passage It is used as buffer unit again.When the piston rod 2 of the present invention stretches out, hydraulic oil can push at buffering ring 8 to baffle ring 7, at this time buffering ring 8 On II 8-1 of through-hole be no longer pressed on the ladder hole wall of T-shaped hole 2-1 on piston rod 2, hydraulic oil is flowed through from II 8-1 of through-hole, delay It rushes ring 8 and loses throttling action with buffer plunger 6 so that piston rod can start rapidly when stretching out.The buffering ring 8 of the present invention delays The mutual cooperation rushed between plunger 6, baffle ring 7 and piston rod 2 achievees the effect that one-way throttle.
Further, the baffle ring 7 is elastic spring, and the perseveration of hydraulic cylinder makes baffle ring constantly be impacted, And elastic spring has good impact resistance so that the service life is longer.
Further, the axial oil duct 6-1 is round oil hole or rectangle oil hole.
As the preferred of the present embodiment, the radial direction oil 6-2 extends radially through the buffer plunger 6 so that buffering There are two oil inlet and outlets for plunger 6, ensure that into fuel-displaced efficiency.
Further, the radial direction oil 6-2 is round oil hole or rectangle oil hole.
As the improvement of the present embodiment, the buffer plunger 6 is equipped with annular at the excircle where radial direction oil 6-2 Slot 6-3, as shown in figure 5, opening up annular groove 6-3 at circumference near on the buffer plunger 6 at radial direction oil 6-2 and being located at The circumference of the buffer plunger 6 at the both ends annular groove 6-3 is still equivalent to the tight fit of oil connection 5 and increases oil inlet and outlet, together When buffer plunger 6 equipped with annular groove 6-3 oil connection 5 is matched with buffer plunger 6 at the excircle where radial direction oil 6-2 An annular opening is formd in the middle part of conjunction in this way can need not make radial direction oil 6-2 and the oil pipe on buffer plunger 6 The aperture position docking of oilhole 5-1 on connector 5 very can accurately achieve the purpose that into fuel-displaced so that assembly is more just Victory improves efficiency of assembling.
As the preferred of the present embodiment, as shown in Figure 6 and Figure 7, it be uniformly provided with four on the circumference of the buffering ring 8 and leads to II 8-1 of hole so that the speed more quick and stable that the piston rod 2 of hydraulic cylinder stretches out.
As the improvement of the present embodiment, the cylinder bottom 4, using being threadedly coupled, is equipped with cylinder barrel 1 between cylinder bottom 4 and cylinder barrel 1 Sealing ring is sealed, and is convenient for the detachable maintaining of hydraulic cylinder.
This buffer structure forms a kind of hydraulic cushion by the cooperation of piston rod T shapes endoporus and buffering ring and buffer plunger Structure solves the action impact during cylinder action, improves host comfort level and continuity of movement, avoid piston rod Hydraulic shock when withdrawal, this external buffer structure also save space, solve the space waste of product;Meanwhile it buffering Plunger is that drainback passage is used as buffer unit again.This external structure design convenient disassembly, is conducive to repair and resiliency The adjustment of energy, and difficulty of processing is reduced, it is easy to manufacture.

Claims (10)

1. a kind of angling cylinder external buffer structure, including cylinder barrel(1), be fixed on cylinder barrel(1)The cylinder bottom of end(4), piston Bar(2), piston(3), buffer plunger(6)And buffering ring(8), piston rod(2)Positioned at cylinder barrel(1)It is interior, piston(3)It is fixed on piston Bar(2)Close to cylinder bottom(4)The end of side, it is characterised in that:The buffer plunger(6)Across cylinder bottom(4)On through-hole I(4- 1)Stretch into piston rod(2)Axial T-shaped hole(2-1)It is interior, buffer plunger(6)With cylinder bottom(4)Threaded connection and and piston rod(2)Between Gap coordinates;The buffering ring(8)Positioned at T-shaped hole(2-1)Exit orifice(2-2)It is interior and can be along buffer plunger(6)Axial movement, The exit orifice(2-2)For T-shaped hole(2-1)Large hole, and exit orifice(2-2)Positioned at piston rod(2)Outside, T-shaped hole(2-1) Exit orifice(2-2)It is inside additionally provided with to buffering ring(8)The baffle ring limited(7), buffering ring(8)With baffle ring(7)Between have between axial direction Gap, buffering ring(8)Circumference on be uniformly provided with several through-holes II(8-1);The buffer plunger(6)With cylinder bottom(4)Outer surface Between be equipped with oil connection(5), oil connection(5)It is sleeved on buffer plunger(6)On, buffer plunger(6)It is equipped with axial oil duct (6-1)And radial direction oil(6-2), axial oil duct(6-1)And radial direction oil(6-2)It is connected, the radial direction oil(6-2)With Oil connection(5)On oilhole(5-1)Connection.
2. the external buffer structure of angling cylinder according to claim 1, it is characterised in that:The buffer plunger(6) With oil connection(5)Between and oil connection(5)With cylinder bottom(4)Between be equipped with sealing ring and be sealed.
3. the external buffer structure of angling cylinder according to claim 1, it is characterised in that:The baffle ring(7)For steel Silk baffle ring.
4. the external buffer structure of angling cylinder according to claim 1, it is characterised in that:The axial oil duct(6- 1)For round oil hole or rectangle oil hole.
5. the external buffer structure of angling cylinder according to claim 1, it is characterised in that:The radial direction oil(6- 2)Extend radially through the buffer plunger(6).
6. the external buffer structure of angling cylinder according to claim 1 or 5, it is characterised in that:The radial direction oil (6-2)For round oil hole or rectangle oil hole.
7. the external buffer structure of angling cylinder according to claim 1 or 5, it is characterised in that:The buffer plunger (6)In radial direction oil(6-2)Annular groove is equipped at the excircle at place(6-3).
8. the external buffer structure of angling cylinder according to claim 6, it is characterised in that:The buffer plunger(6) In radial direction oil(6-2)Annular groove is equipped at the excircle at place(6-3).
9. the external buffer structure of angling cylinder according to claim 1, it is characterised in that:The buffering ring(8)'s Four through-holes II are uniformly provided on circumference(8-1).
10. the external buffer structure of angling cylinder according to claim 1, it is characterised in that:The cylinder bottom(4)With cylinder Cylinder(1)Using threaded connection, cylinder bottom(4)With cylinder barrel(1)Between be sealed equipped with sealing ring.
CN201710550944.XA 2017-07-07 2017-07-07 The external buffer structure of angling cylinder Active CN107165886B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201710550944.XA CN107165886B (en) 2017-07-07 2017-07-07 The external buffer structure of angling cylinder

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CN107165886B true CN107165886B (en) 2018-10-12

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111608983B (en) * 2020-05-29 2022-03-25 徐州徐工液压件有限公司 Adjustable detachable self-adaptive floating buffer structure
CN112228426A (en) * 2020-11-19 2021-01-15 徐州徐工液压件有限公司 Buffer device for self-adaptive lubricating telescopic hydraulic cylinder of piston

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4262879B2 (en) * 2000-10-10 2009-05-13 カヤバ工業株式会社 Lift cylinder
JP3814528B2 (en) * 2001-12-04 2006-08-30 カヤバ工業株式会社 Hydraulic cylinder
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
CN101776104A (en) * 2010-03-04 2010-07-14 合肥市力恒科技有限责任公司 Single-acting plunger type buffering hydraulic oil cylinder
CN103573749B (en) * 2013-11-04 2016-04-06 湖南特力液压有限公司 Buffering hydraulic cylinder
CN204003784U (en) * 2014-07-08 2014-12-10 徐州徐工液压件有限公司 Built-in oil pipe type buffer structure alive for oil hydraulic cylinder
CN105443491B (en) * 2015-12-07 2017-10-03 柳州柳工液压件有限公司 Fork truck lifting oil cylinder
CN105715612A (en) * 2016-04-26 2016-06-29 合肥长源液压股份有限公司 Throttling buffer cylinder with integrated buffer cylinder bottom

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