CN106144922A - A kind of folding-jib truck-mounted crane telescopic hydraulic cylinder buffer unit - Google Patents
A kind of folding-jib truck-mounted crane telescopic hydraulic cylinder buffer unit Download PDFInfo
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- CN106144922A CN106144922A CN201510135877.6A CN201510135877A CN106144922A CN 106144922 A CN106144922 A CN 106144922A CN 201510135877 A CN201510135877 A CN 201510135877A CN 106144922 A CN106144922 A CN 106144922A
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- oil pocket
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Abstract
The present invention is a kind of folding-jib truck-mounted crane telescopic hydraulic cylinder buffer unit, it is cavity in piston rod, cavity is additionally provided with oil pipe along its length, the two ends of oil pipe extend through out piston and termination forms rodless cavity oil circuit, the tail end of piston is provided with cushion collar one by cushion collar gland, being provided with rodless cavity oil oil-in one by check valve in base, rodless cavity oil oil-in one and through without bar oil pocket, termination is provided with and is connected with oil pipe without bar oil pocket oil-in two；It is additionally provided with bar oil pocket oil-in two on termination and piston rod internal cavity has been formed with bar oil pocket, had oilhole that bar oil pocket is provided with by piston rod and have bar oil pocket oil-in two through；Inwardly running through fairlead from the sidewall of cylinder barrel and be provided with bar oil pocket oil-in one, bar oil pocket is through with having.Two set oil circuits contribute to the stretching motion of piston rod, and increase floating-type cushion set is to limit hydraulic fluid flow rate, thus realizes stretching, reducing the buffering effect of speed；Thus improve the stationarity of loop wheel machine running, safety.
Description
Technical field
The present invention relates to cylinder cushion device, specifically a kind of folding-jib truck-mounted crane telescopic hydraulic cylinder buffer unit.
Background technology
Telescopic hydraulic cylinder as a pith of folding-jib truck-mounted crane jib, be possible not only to control jib stretch, contracting action, also act as share, the effect of supporting arm frame handling weight.Traditional (binding type) telescopic hydraulic cylinder is limited by installing space, is typically designed to elongated cylinder diameter (cylinder diameter≤100mm, stroke >=1600mm), requires to stretch, contracting speed and frequency " soon " be so that raising work efficiency simultaneously.
Traditional gibbet cylinder is under the telescopic hydraulic cylinder effect not having buffer unit, when piston rod runs and extends end of travel, owing to telescopic oil cylinder piston upper surface is clashed into and laminating with the sudden of fairlead lower surface, gibbet cylinder also emergent stopping moves, the weight that loop wheel machine is lifted is under the effect of inertia force, and lifting weight in lower end can stop producing centre-of gravity shift because of emergency and weight swings；And then safety, the stability of complete machine is caused extreme influence.
Summary of the invention
Patent of the present invention is applied at truck-mounted crane (binding type) telescopic hydraulic cylinder interior, prevents emergency from stopping producing centre-of gravity shift and weight swings；The protection safety of complete machine, stability, a kind of folding-jib truck-mounted crane telescopic hydraulic cylinder buffer unit of special proposition.
nullTechnical scheme for this patent of the present invention is: a kind of folding-jib truck-mounted crane telescopic hydraulic cylinder buffer unit，Including cylinder barrel，The tail end of cylinder barrel 1 is provided with base 3，Piston rod 2 it is equipped with in cylinder barrel 1，It is provided with piston 4 between afterbody and cylinder barrel 1 inwall of piston rod 2，It is provided with fairlead 5 between front end cylinder barrel 1 inwall of piston rod 2，And it is fixing to be directed to overlap 5 by gland 6，Piston rod 2 is made to slide in fairlead 5，The top of piston rod 2 is provided with work action head 7，It is cavity in piston rod 2，Cavity is additionally provided with oil pipe 8 along its length，The two ends of oil pipe 8 extend through out piston 4 and termination 7 forms rodless cavity oil circuit 17，The tail end of piston 4 is provided with cushion collar 1 by cushion collar gland 9，Cushion collar 1 and base 3 coordinate to be installed，It is provided with rodless cavity oil oil-in 1 by check valve 11 in base 3，Rodless cavity oil oil-in 1 and through without bar oil pocket 17，Termination 7 is provided with and is connected with oil pipe 8 without bar oil pocket oil-in 2 13；It is additionally provided with bar oil pocket oil-in 2 14 on termination 7 and piston rod 2 internal cavity has been formed with bar oil pocket 18, had oilhole 16 that bar oil pocket 18 is provided with by piston rod 2 and have bar oil pocket oil-in 2 14 through；Inwardly running through fairlead 5 from the sidewall of cylinder barrel 1 and be provided with bar oil pocket oil-in 1, bar oil pocket 18 is through with having.
Further it is improved by: the side at piston rod 2 upper oil hole 16 is provided with cushion collar 2 20.
Further it is improved by: on the lateral wall of cylinder barrel 1, be additionally provided with mounting seat 19.
Beneficial effect:
Patent of the present invention is used in combination by cylinder barrel, piston rod, piston rod internal cavity and oil pipe, define bar oil pocket and without bar oil pocket, two set oil circuits contribute to the stretching motion of piston rod, and increase floating-type cushion set is to limit hydraulic fluid flow rate, thus realizes stretching, reducing the buffering effect of speed；Buffer unit is completely eliminated impact force and the noise of end of travel, thus improves the stationarity of loop wheel machine running, safety.
Have at hydraulic cylinder, increase cushion collar respectively without bar oil pocket, it is achieved that hydraulic cylinder travel end limits hydraulic oil flow velocity to slow down the design concept of impulsive force；Simultaneously can popularization and application to other all kinds folding-jib truck-mounted crane (binding type) telescopic oil cylinder, in order to eliminate impact force and the noise that arm cylinder produces at end of travel, improve the stability of complete machine operation, safety.
Accompanying drawing explanation
Fig. 1 is the assembling schematic diagram of the present invention.
Fig. 2 is the stretching, extension schematic diagram of the present invention.
Fig. 3 is the junction enlarged diagram after the present invention stretches.
Fig. 4 is present invention motion schematic diagram of oil pocket when stretching.
Fig. 5 is present invention motion schematic diagram of oil pocket when bouncing back.
1 cylinder barrel, 2 piston rods, 3 bases, 4 pistons, 5 fairleads, 6 glands, 7 terminations, 8 oil pipes, 9 cushion collar glands, 10 cushion collars one, 11 check valves, 12 rodless cavity oil oil-ins one, 13 rodless cavity oil oil-ins two, 14 have bar oil pocket oil-in two, 15 rod chamber oil oil-ins one, 16 oilholes, 17 without bar oil pocket, 18 have bar oil pocket, 19 mounting seats, 20 cushion collars two.
Detailed description of the invention
The present invention is as shown in Fig. 1,2,3,4,5.
nullA kind of folding-jib truck-mounted crane telescopic hydraulic cylinder buffer unit，Including cylinder barrel，The tail end of cylinder barrel 1 is provided with base 3，Piston rod 2 it is equipped with in cylinder barrel 1，It is provided with piston 4 between afterbody and cylinder barrel 1 inwall of piston rod 2，It is provided with fairlead 5 between front end cylinder barrel 1 inwall of piston rod 2，And it is fixing to be directed to overlap 5 by gland 6，Piston rod 2 is made to slide in fairlead 5，The top of piston rod 2 is provided with work action head 7，It is cavity in piston rod 2，Cavity is additionally provided with oil pipe 8 along its length，The two ends of oil pipe 8 extend through out piston 4 and termination 7 forms rodless cavity oil circuit 17，The tail end of piston 4 is provided with cushion collar 1 by cushion collar gland 9，Cushion collar 1 and base 3 coordinate to be installed，It is provided with rodless cavity oil oil-in 1 by check valve 11 in base 3，Rodless cavity oil oil-in 1 and through without bar oil pocket 17，Termination 7 is provided with and is connected with oil pipe 8 without bar oil pocket oil-in 2 13；It is additionally provided with bar oil pocket oil-in 2 14 on termination 7 and piston rod 2 internal cavity has been formed with bar oil pocket 18, had oilhole 16 that bar oil pocket 18 is provided with by piston rod 2 and have bar oil pocket fuel feed hole 2 14 through；Inwardly running through fairlead 5 from the sidewall of cylinder barrel 1 and be provided with bar oil pocket oil-in 1, bar oil pocket 18 is through with having.
Side at piston rod 2 upper oil hole 16 is provided with cushion collar 2 20.
The lateral wall of cylinder barrel 1 is additionally provided with mounting seat 19.
Cushion collar operation principle describes:
Folding-jib truck-mounted crane arm cylinder (binding type) telescoping cylinder is to be controlled to use by the series connection of branched concertina type hydraulic cylinder；Circulation for ease of fluid, single telescopic hydraulic cylinder is designed with 4 oilholes, i.e. 2 oilholes are logical is connected with bar oil pocket 18 without bar oil pocket, 2 oilholes, and such telescopic hydraulic cylinder piston rod must be designed to hollow structure, and endoporus need to weld oil pipe so that the rodless cavity of other telescopic hydraulic cylinder of UNICOM.Based on special use requirement, rodless cavity buffering have employed cushion collar gland 9 and cushion collar 1 substep combinative structure, and simultaneous buffering jacket gland 9 uses spiral marking connection with piston rod spindle nose so that gland endoporus and rodless cavity UNICOM.
Fig. 4 be shown with bar oil pocket 18 buffer unit lifting operation principle: piston rod 2 is quickly stretched out by hydraulic thrust, piston 4 runs with cushion collar 2 20 and during close to range, 10 degree of R shape conical surfaces of cushion collar 2 20 design preferentially enter fairlead 6, fairlead 6 Front-end Design has a R arc so that cushion collar 2 20 enters endoporus, to play current limitation effect the most rapidly；Along with cushion collar iterative method slowly, now hydraulic oil can only be flowed out by the gap of the two-way conical surface of cushion collar and fairlead endoporus, cushion collar 2 20 and fairlead 6 maximal clearance are 0.2mm, minimum clearance 0.02mm, with reach limit hydraulic oil flow velocity effect, and then play alleviate impulsive force and increase baffle safety effect.
Without bar oil pocket buffer unit retraction operation principle shown in Fig. 5: during retraction, hydraulic oil enters cylinder interior to promote piston rod 2 to bounce back by having bar oil pocket oil-in 2 14, bar chamber oil oil-in 1, piston 4 bounces back and during close to hydraulic cylinder minimum stroke, and the check valve 11 being now arranged on cylinder bottom plays closedown, throttling action.
Check valve principle: when piston rod 2 stretches out, check valve 11 opens under 0.5Mpa pressure, and hydraulic oil, through check valve 11 and cylinder bottom fuel feed hole oil-feed, stops that cushion collar 1 lifting surface area is the least causes startup pressure excessive；During piston rod retraction, the restraining effect of check valve 11 makes fluid can not be flowed out by check valve, and when lifting with hydraulic cylinder, principle is similar: 10 degree of R shape conical surfaces of cushion collar 1 preferentially enter entrance cylinder bottom endoporus；Can only be flowed out by the gap between the two-way conical surface and the cylinder bottom endoporus of cushion collar with the hydraulic oil between back piston and cylinder bottom, the hydraulic cylinder entirety retraction speed of service slows down and then realizes Cushioning Design.
Claims (3)
- null1. a folding-jib truck-mounted crane telescopic hydraulic cylinder buffer unit，Including cylinder barrel (1)，It is characterized in that: the tail end of cylinder barrel (1) is provided with base (3)，Piston rod (2) it is equipped with in cylinder barrel (1)，It is provided with piston (4) between afterbody and cylinder barrel (1) inwall of piston rod (2)，It is provided with fairlead (5) between front end cylinder barrel (1) inwall of piston rod (2)，And it is fixing to be directed to overlap (5) by gland (6)，Piston rod (2) is made to slide in fairlead (5)，The top of piston rod (2) is provided with work action head (7)，It is cavity in piston rod (2)，Cavity is additionally provided with oil pipe (8) along its length，The two ends of oil pipe (8) extend through out piston (4) and termination (7) form rodless cavity oil circuit (17)，The tail end of piston (4) is provided with cushion collar one (10) by cushion collar gland (9)，Cushion collar one (10) and base (3) coordinate to be installed，It is provided with rodless cavity oil oil-in one (12) by check valve (11) in base (3)，Rodless cavity oil oil-in one (12) and through without bar oil pocket (17)，Termination (7) is provided with and is connected with oil pipe (8) without bar oil pocket oil-in two (13)；It is additionally provided with bar oil pocket oil-in two (14) on termination (7) and piston rod (2) internal cavity has been formed with bar oil pocket (18), had oilhole (16) that bar oil pocket (18) is provided with by piston rod (2) and have bar oil pocket oil-in two (14) through；Inwardly running through fairlead (5) from the sidewall of cylinder barrel (1) and be provided with bar oil pocket oil-in one (15), bar oil pocket (18) is through with having.
- A kind of folding-jib truck-mounted crane telescopic hydraulic cylinder buffer unit the most according to claim 1, it is characterised in that: oilhole (16) side on piston rod (2) is provided with cushion collar two (20).
- A kind of folding-jib truck-mounted crane telescopic hydraulic cylinder buffer unit the most according to claim 1, it is characterised in that: on the lateral wall of cylinder barrel (1), it is additionally provided with mounting seat (19).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510135877.6A CN106144922A (en) | 2015-03-27 | 2015-03-27 | A kind of folding-jib truck-mounted crane telescopic hydraulic cylinder buffer unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510135877.6A CN106144922A (en) | 2015-03-27 | 2015-03-27 | A kind of folding-jib truck-mounted crane telescopic hydraulic cylinder buffer unit |
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| Publication Number | Publication Date |
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| CN106144922A true CN106144922A (en) | 2016-11-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510135877.6A Pending CN106144922A (en) | 2015-03-27 | 2015-03-27 | A kind of folding-jib truck-mounted crane telescopic hydraulic cylinder buffer unit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457931A (en) * | 2018-05-03 | 2018-08-28 | 陕西昆仑机械装备制造有限责任公司 | A kind of piston rod oil inlet oil extraction oil cylinder |
| CN111765141A (en) * | 2020-06-29 | 2020-10-13 | 徐州徐工随车起重机有限公司 | Bidirectional impact-proof hydraulic telescopic oil cylinder for lorry-mounted crane |
| CN112173995A (en) * | 2020-09-27 | 2021-01-05 | 徐州徐工液压件有限公司 | Core-tube-free single-drive-type telescopic hydraulic cylinder |
-
2015
- 2015-03-27 CN CN201510135877.6A patent/CN106144922A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108457931A (en) * | 2018-05-03 | 2018-08-28 | 陕西昆仑机械装备制造有限责任公司 | A kind of piston rod oil inlet oil extraction oil cylinder |
| CN111765141A (en) * | 2020-06-29 | 2020-10-13 | 徐州徐工随车起重机有限公司 | Bidirectional impact-proof hydraulic telescopic oil cylinder for lorry-mounted crane |
| CN112173995A (en) * | 2020-09-27 | 2021-01-05 | 徐州徐工液压件有限公司 | Core-tube-free single-drive-type telescopic hydraulic cylinder |
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Application publication date: 20161123 |
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| WD01 | Invention patent application deemed withdrawn after publication |