CN102975765A - Forklift hydraulic control steering balancing device - Google Patents
Forklift hydraulic control steering balancing device Download PDFInfo
- Publication number
- CN102975765A CN102975765A CN2011103711942A CN201110371194A CN102975765A CN 102975765 A CN102975765 A CN 102975765A CN 2011103711942 A CN2011103711942 A CN 2011103711942A CN 201110371194 A CN201110371194 A CN 201110371194A CN 102975765 A CN102975765 A CN 102975765A
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- oil
- steering gear
- balancing device
- blind hole
- hydraulic steering
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- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention discloses a forklift hydraulic control steering balancing device which comprises a full hydraulic steering gear, two oil cylinders and an oil tank. A pressure oil inlet, oil return opening and two working ports are formed in the full hydraulic steering gear. The oil tank is provided with an oil inlet and an oil outlet. The oil outlet is connected with the pressure oil inlet of the full hydraulic steering gear through an oil pump. The oil inlet is connected with the oil return opening of the full hydraulic steering gear through a filter. The forklift hydraulic control steering balancing device is characterized in that a rodless cavity of one oil cylinder is communicated with a rod cavity of another oil cylinder through pipelines; a valve bush in a sealed state is inserted into a blind hole, and the external end of the valve bush is level and parallel to the corresponding end of a piston; and the diameter of the outer segment of the valve bush is smaller than the diameter of the inner segment of the valve bush, and therefore a peripheral step is formed on the position, close to the opening portion, of an inner cavity of the valve bush. The forklift hydraulic control steering balancing device has the advantages of avoiding walking difficulty of a forklift when the positions of two oil cylinder pistons are different from each other, guaranteeing the normal operation of the forklift, and improving the efficiency of labor.
Description
Technical field
The present invention relates to a kind of fork truck fluid control steering and balancing device.
Background technology
The important apparatus of fork truck present tense reprinting unloading operation, bringing into play in the course of the work huge effect, the hydraulic control device that is used at present controlling two front-wheel steerings of fork truck all contains fuel tank, all-hydraulic steering gear and two oil cylinders, two oil cylinders are controlled respectively a fork truck front-wheel when operation, by fuel tank, oil pump and all-hydraulic steering gear make the simultaneously oil-feeds of two oil cylinders and the fuel-displaced synchronous rotating of realizing two front-wheels of fork truck to.The piston position of two oil cylinders sometimes can be variant, when in case the piston arrives cylinder bottom of an oil cylinder occurs, the piston of another oil cylinder not necessarily can arrive cylinder bottom will make two front-wheel steering angles of fork truck inconsistent, has caused the difficulty in walking of fork truck, can't work.
Summary of the invention
In order to overcome defects, the invention provides that a kind of fork truck fluid control steering and balancing device is avoided owing to cause the forklift-walking suffering during two cylinder piston position generation difference, guarantee that fork truck can work, improved efficiency.
The present invention for the technical scheme that solves its technical matters and adopt is: a kind of fork truck fluid control steering and balancing device, comprise all-hydraulic steering gear, two oil cylinders and fuel tank, pressure oil import, return opening and two actuator ports are arranged on the wherein said all-hydraulic steering gear; Oil inlet and oil outlet are arranged on the described fuel tank, and described oil outlet links to each other with the pressure oil import of all-hydraulic steering gear by an oil pump, and oil inlet joins by the return opening of a filter and all-hydraulic steering gear; It is characterized in that: the rodless cavity of one of them oil cylinder is connected by pipeline with the rod chamber of another oil cylinder, this valve pocket be the sealing shape insert in the blind hole and its outer end mutually concordant with the respective ends of piston, its outer section diameter is less than inner segment, thereby the chamber forms circumferential step near the oral area place within it.
Be as further improvement of the present invention: the rod chamber that described two oil cylinders are not connected and rodless cavity then are connected with an actuator port of all-hydraulic steering gear respectively; All there is a blind hole that is used to form valve pocket at the piston two ends of each oil cylinder, and the oral area of each blind hole all has a valve pocket; Push rod is arranged in the valve pocket.
Further improve as the present invention and to be: outer section diameter of push rod be less than inner segment, thereby form circumferential step at its cylindrical, and inside and outside section of push rod is with the inside and outside intersegmental gapped of valve pocket and be bearing fit; Spring and spherical valve core are arranged in the blind hole, the two ends of spring respectively with at the bottom of the hole of blind hole and spherical valve core offset, and spherical valve core gets lodged on the inner end of valve pocket and and the push rod inner end between leave the gap; Stretch out outside the respective ends of piston the outer end of push rod, and its length of stretching out is greater than the gap between spherical valve core and its inner end; Two blind hole present on first meeting have radial hole, and the two ends of this radial hole are connected with two blind holes respectively.
A kind of fork truck fluid control steering and balancing device of the present invention, because in two oil cylinders, when the piston arrives cylinder bottom that an oil cylinder occurs, and the work of another oil cylinder has when arriving cylinder bottom, the push rod that arrives that pistons end of cylinder bottom can withstand cylinder bottom, make between the piston of this oil cylinder and its cylinder bottom and leave the gap, another in-oil cylinder hydraulic oil is flowed in the rodless cavity of this oil cylinder, until two in-oil cylinder piston positions are equated.Thereby two front-wheel steering angles guaranteeing fork truck are consistent, cause the forklift-walking suffering when avoiding owing to two cylinder piston position generation difference, guarantee that fork truck can work, and improved efficiency.
Description of drawings
Fig. 1 is fork truck fluid control steering and balancing device scheme drawing of the present invention;
Fig. 2 is oil cylinder piston structure scheme drawing of the present invention.
1-fuel tank, 2-all-hydraulic steering gear, 3-filter, 4-pipe rod chamber are by pipeline road, 5-oil cylinder, 6-piston, 7-actuator port, 8-oil pump, 9-push rod, 10-valve pocket, 11-cylinder bottom, 12-spring, 13-spherical valve core among the figure.
P is that pressure oil import, T are return opening.
The specific embodiment
In order to deepen the understanding of the present invention, the invention will be further described below in conjunction with embodiment and accompanying drawing, and this embodiment only is used for explaining the present invention, does not consist of the restriction to protection domain of the present invention.
Shown in Fig. 1,2 a kind of fork truck fluid control of the present invention steering and balancing device, comprise all-hydraulic steering gear 2, two oil cylinders 5 and fuel tank 1, pressure oil import (P), return opening (T) and two actuator ports 7 are arranged on the wherein said all-hydraulic steering gear 2; On the described fuel tank 1 oil inlet and oil outlet are arranged, described oil outlet links to each other with the pressure oil import (P) of all-hydraulic steering gear 2 by an oil pump 8, and oil inlet joins by the return opening (T) of a filter 3 with all-hydraulic steering gear 2;
The rodless cavity of one of them oil cylinder 5 is connected by pipeline 4 with the rod chamber of another oil cylinder 5, this valve pocket be the sealing shape insert in the blind hole and its outer end mutually concordant with the respective ends of piston 6, its outer section diameter is less than inner segment, thereby the chamber forms circumferential step near the oral area place within it.
The rod chamber that described two oil cylinders 5 are not connected and rodless cavity then are connected with an actuator port 7 of all-hydraulic steering gear 2 respectively; All there is a blind hole that is used to form valve pocket at piston 6 two ends of each oil cylinder 5, and the oral area of each blind hole all has a valve pocket 10, in the described valve pocket 10 push rod 9 are arranged.
Outer section diameter of described push rod 9 be less than inner segment, thereby form circumferential step at its cylindrical, and inside and outside section of push rod 9 is with the inside and outside intersegmental gapped of valve pocket 10 and be bearing fit; Spring 12 and spherical valve core 13 are arranged in the blind hole, the two ends of spring 12 respectively with at the bottom of the hole of blind hole and spherical valve core 13 offset, and spherical valve core 13 gets lodged on the inner end of valve pocket 10 and and push rod 9 inner ends between leave the gap; Stretch out outside the respective ends of piston 6 outer end of push rod 9, and its length of stretching out is greater than the gap between spherical valve core 13 and its inner end; Two blind hole present on first meeting have radial hole, and the two ends of this radial hole are connected with two blind holes respectively.
A kind of fork truck fluid control steering and balancing device of the present invention is in the operation process of fork truck, when the piston 6 of an oil cylinder 5 arrives cylinder bottom 11, when the piston 6 of another oil cylinder 5 does not arrive cylinder bottom 11, the push rod 9 that arrives those piston 6 ends of cylinder bottom 11 can just withstand cylinder bottom 11, make piston 6 and 11 of its cylinder bottoms of this oil cylinder leave the gap, hydraulic oil in another oil cylinder 5 is flowed in the rodless cavity of this oil cylinder, until piston 6 positions in two oil cylinders 5 are equated.Thereby two front-wheel steering angles having guaranteed fork truck are consistent, reduced the walking resistance of fork truck, and fork truck can be worked.
Claims (3)
1. fork truck fluid control steering and balancing device, comprise all-hydraulic steering gear (2), two oil cylinders (5) and fuel tank (1), pressure oil import, return opening and two actuator ports (7) are arranged on the wherein said all-hydraulic steering gear (2); Described fuel tank has oil inlet and oil outlet on (1), described oil outlet links to each other with the pressure oil import of all-hydraulic steering gear (2) by an oil pump (8), and oil inlet joins by the return opening of a filter (3) with all-hydraulic steering gear (2); It is characterized in that: the rodless cavity of one of them oil cylinder (5) is connected by pipeline (4) with the rod chamber of another oil cylinder (5), this valve pocket be the sealing shape insert in the blind hole and its outer end mutually concordant with the respective ends of piston (6), its outer section diameter is less than inner segment, thereby the chamber forms circumferential step near the oral area place within it.
2. a kind of fork truck fluid control steering and balancing device according to claim 1, it is characterized in that: the rod chamber that described two oil cylinders (5) are not connected and rodless cavity then are connected with an actuator port (7) of all-hydraulic steering gear (2) respectively; All there is a blind hole that is used to form valve pocket at piston (6) two ends of each oil cylinder (5), and the oral area of each blind hole all has a valve pocket (10); Push rod (9) is arranged in the valve pocket (10).
3. a kind of fork truck fluid control steering and balancing device according to claim 2, it is characterized in that: outer section diameter of described push rod (9) is less than inner segment, thereby form circumferential step at its cylindrical, and inside and outside section of push rod (9) is with the inside and outside intersegmental gapped of valve pocket (10) and be bearing fit; Spring (12) and spherical valve core (13) are arranged in the blind hole, the two ends of spring (12) respectively with at the bottom of the hole of blind hole and spherical valve core (13) offset, and spherical valve core (13) gets lodged on the inner end of valve pocket (10) and and push rod (9) inner end between leave the gap; Stretch out outside the respective ends of piston (6) outer end of push rod (9), and its length of stretching out is greater than the gap between spherical valve core (13) and its inner end; Two blind hole present on first meeting have radial hole, and the two ends of this radial hole are connected with two blind holes respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103711942A CN102975765A (en) | 2011-11-21 | 2011-11-21 | Forklift hydraulic control steering balancing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103711942A CN102975765A (en) | 2011-11-21 | 2011-11-21 | Forklift hydraulic control steering balancing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102975765A true CN102975765A (en) | 2013-03-20 |
Family
ID=47850205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011103711942A Pending CN102975765A (en) | 2011-11-21 | 2011-11-21 | Forklift hydraulic control steering balancing device |
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| Country | Link |
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| CN (1) | CN102975765A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107879290A (en) * | 2017-12-20 | 2018-04-06 | 合肥搬易通科技发展有限公司 | The enlarger that a kind of multidirectional forklift front wheel turns to |
| CN113232719A (en) * | 2021-06-24 | 2021-08-10 | 上海三一重机股份有限公司 | Steering system and loader |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201056230Y (en) * | 2007-06-28 | 2008-05-07 | 季亚伟 | Series steering oil cylinder double-spot balancing device |
| CN101332831A (en) * | 2007-06-28 | 2008-12-31 | 季亚伟 | Fork-truck steering and balancing device |
| CN201485234U (en) * | 2009-08-04 | 2010-05-26 | 厦门厦工机械股份有限公司 | Synchronous device achieving fork of forklift |
-
2011
- 2011-11-21 CN CN2011103711942A patent/CN102975765A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201056230Y (en) * | 2007-06-28 | 2008-05-07 | 季亚伟 | Series steering oil cylinder double-spot balancing device |
| CN101332831A (en) * | 2007-06-28 | 2008-12-31 | 季亚伟 | Fork-truck steering and balancing device |
| CN201485234U (en) * | 2009-08-04 | 2010-05-26 | 厦门厦工机械股份有限公司 | Synchronous device achieving fork of forklift |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107879290A (en) * | 2017-12-20 | 2018-04-06 | 合肥搬易通科技发展有限公司 | The enlarger that a kind of multidirectional forklift front wheel turns to |
| CN113232719A (en) * | 2021-06-24 | 2021-08-10 | 上海三一重机股份有限公司 | Steering system and loader |
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Application publication date: 20130320 |