CN101332831A - Fork-truck steering and balancing device - Google Patents
Fork-truck steering and balancing device Download PDFInfo
- Publication number
- CN101332831A CN101332831A CNA2007100239506A CN200710023950A CN101332831A CN 101332831 A CN101332831 A CN 101332831A CN A2007100239506 A CNA2007100239506 A CN A2007100239506A CN 200710023950 A CN200710023950 A CN 200710023950A CN 101332831 A CN101332831 A CN 101332831A
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- oil
- hydraulic steering
- piston
- oil cylinder
- valve pocket
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Abstract
The invention discloses a forklift steering balancing device which includes an oil box, a full hydraulic steering device and two oil cylinders. The oil outlet of the oil box is connected with the pressure oil inlet of the full hydraulic steering device by an oil pump; the oil inlet of the oil box is connected with the return opening of the full hydraulic steering device by a filter. The forklift steering balancing device is characterized in that the rod-free cavity of one oil cylinder is communicated with the rod cavity of the other oil cylinder by a pipeline; while the rod cavity and the rod-free cavity of the two oil cylinders are respectively communicated with one working oil opening of the full hydraulic steering device. The two ends of the piston of each oil cylinder are provided with blind holes used as valve cavities; all the blind holes are provided with a valve consisting of a top rod, a spring and a spherical valve core. The outer end of the top rod extends out of the corresponding end of the piston. A radical hole is arranged between the two blind holes; the two ends of the radical hole are respectively communicated with the two blind holes. The forklift steering balancing device can be used for reducing the walking resistance of the forklift and ensuring the forklift can work normally. Besides, the forklift steering balancing device can be used for controlling the steering of the two front wheels of the forklift.
Description
Technical field
The present invention relates to a kind of hydraulic control device.Be the fork-truck steering and balancing device that is used for controlling two front-wheel steerings of fork truck specifically.
Background technology
At present, the hydraulic control device that is used for controlling two front-wheel steerings of fork truck all contains fuel tank, all-hydraulic steering gear and two oil cylinders, and pressure oil import, return opening and two actuator ports are arranged on the all-hydraulic steering gear.Oil inlet and oil outlet are arranged on the fuel tank, and oil outlet links to each other with the pressure oil import of all-hydraulic steering gear by oil pump, and oil inlet joins by the return opening of filter and all-hydraulic steering gear.Said two oil cylinders are independent mutually, and their oil inlet and oil outlet are connected with the actuator port and the return opening of all-hydraulic steering gear respectively.During work, two oil cylinders are controlled a fork truck front-wheel respectively, make the oil-feeds simultaneously of two oil cylinders and fuel-displacedly realize turning to synchronously of two front-wheels of fork truck by fuel tank, oil pump and all-hydraulic steering gear.Because two oil cylinders are separate, in the working process, the piston position of two oil cylinders unavoidably can be variant, and when the piston arrives cylinder bottom of an oil cylinder, the piston of another oil cylinder not necessarily can arrive cylinder bottom.If this occurs, will make two front-wheel steering angles of fork truck inconsistent, thereby increase the walking resistance of fork truck, when serious, fork truck can't be walked, be difficult to normal operation.
Summary of the invention
The problem to be solved in the present invention provides a kind of fork-truck steering and balancing device.Use this device, can reduce the walking resistance of fork truck, guarantee that fork truck can normal operation.
For addressing the above problem, the present invention takes following technical scheme:
Fork-truck steering and balancing device of the present invention contains fuel tank, all-hydraulic steering gear and two oil cylinders, and pressure oil import, return opening and two actuator ports are arranged on the all-hydraulic steering gear.Oil inlet and oil outlet are arranged on the fuel tank, and oil outlet links to each other with the pressure oil import of all-hydraulic steering gear by oil pump, and oil inlet joins by the return opening of filter and all-hydraulic steering gear.Be characterized in that the rodless cavity of an oil cylinder is connected by pipeline with the rod chamber of another oil cylinder in said two oil cylinders, rod chamber that this two oil cylinder is 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.This valve pocket be the sealing shape insert in the blind hole and its outer end mutually concordant with the respective end of piston, its outer section diameter is less than inner segment, thus the chamber is near oral area place formation circumferential step within it.Push rod is arranged in the valve pocket, and outer section diameter of this push rod be less than inner segment, thereby form circumferential step on 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 end 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.Between two blind holes radial hole is arranged, the two ends of this radial hole are connected with two blind holes respectively.
Take such scheme, have the following advantages:
Because fork-truck steering and balancing device of the present invention, in two oil cylinder, the rodless cavity of an oil cylinder is connected by pipeline with the rod chamber of another oil cylinder, and rod chamber that this two oil cylinder is not connected and rodless cavity then are connected with two actuator ports 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.This valve pocket be the sealing shape insert in the blind hole and its outer end mutually concordant with the respective end of piston, its outer section diameter is less than inner segment, thus the chamber is near oral area place formation circumferential step within it.Push rod is arranged in the valve pocket, and outer section diameter of this push rod be less than inner segment, thereby form circumferential step on 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 end 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.Between two blind holes radial hole is arranged, the two ends of this radial hole are connected with two blind holes respectively.When the piston arrives cylinder bottom that an oil cylinder occurs, and the piston of another oil cylinder is not 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 guarantee two front-wheel steering angle unanimities of fork truck, reduced the walking resistance of fork truck, make the fork truck can normal operation.
Description of drawings
Fig. 1 is a fork-truck steering and balancing device scheme drawing of the present invention;
Fig. 2 turns to the oil cylinder piston structure scheme drawing among Fig. 1.
The specific embodiment
As shown in Figure 1, fork-truck steering and balancing device of the present invention contains fuel tank 8, all-hydraulic steering gear 6 and two oil cylinders 2, and all-hydraulic steering gear 6 is provided with pressure oil import P, oil return inlet T and two actuator ports 5.Be processed with oil inlet and oil outlet on the fuel tank 8, oil outlet links to each other with the pressure oil import P of all-hydraulic steering gear 6 by an oil pump 7, and oil inlet joins by a filter 1 and the oil return inlet T of all-hydraulic steering gear 6.In said two oil cylinders 2, the rodless cavity of an oil cylinder 2 is connected by pipeline 3 with the rod chamber of another oil cylinder 2, and rod chamber that this two oil cylinder 2 is not connected and rodless cavity then are connected with the actuator port one by one 5 of all-hydraulic steering gear 6 respectively.See Fig. 2, all be processed with a blind hole that is used to form valve pocket at piston 4 two ends of each oil cylinder 2, the oral area of each blind hole all is equipped with a valve pocket 12.This valve pocket by seal ring be the sealing shape insert in the blind hole and its outer end mutually concordant with the respective end of piston 4, its outer section diameter is less than inner segment, thus the chamber is near oral area place formation circumferential step within it.Push rod 13 is installed in the valve pocket 12, and outer section diameter of this push rod be less than inner segment, thereby form circumferential step on its cylindrical, and inside and outside section of push rod 13 leaves the gap and be bearing fit with the inside and outside intersegmental of valve pocket 12.Spring 11 and spherical valve core 10 are installed in the blind hole, the two ends of spring 11 respectively with at the bottom of the hole of blind hole and spherical valve core 10 offset, and spherical valve core 10 get lodged in valve pocket 12 the inner end and and the inner end of push rod 13 between leave the gap.Stretch out outside the respective end of piston 4 outer end of push rod 13, and its length of stretching out is greater than the gap between spherical valve core 10 and its inner end.Be processed with radial hole between two blind holes, the two ends of this radial hole are connected with two blind holes respectively.
Fork truck in the process of walking, if the piston 4 of an oil cylinder 2 arrives cylinder bottom, and the piston 4 of another oil cylinder 2 is not when arriving cylinder bottom 9, the push rod 13 that arrives those piston 4 ends of cylinder bottom 9 can withstand cylinder bottom 9, make piston 4 and 9 of its cylinder bottoms of this oil cylinder leave the gap, hydraulic oil in another oil cylinder 2 is flowed in the rodless cavity of this oil cylinder, and piston 4 positions in making two oil cylinders 2 equate.Thereby guaranteed two front-wheel steering angle unanimities of fork truck, reduced the walking resistance of fork truck, made the fork truck can normal operation.
Claims (1)
1. fork-truck steering and balancing device comprises fuel tank (8), all-hydraulic steering gear (6) and two oil cylinders (2), and pressure oil import (P), return opening (T) and two actuator ports (5) are arranged on the all-hydraulic steering gear (6); Fuel tank has oil inlet and oil outlet on (8), and oil outlet links to each other with the pressure oil import (P) of all-hydraulic steering gear (6) by an oil pump (7), and oil inlet joins by the return opening (T) of a filter (1) with all-hydraulic steering gear (6); The rodless cavity that it is characterized in that an oil cylinder (2) is connected by pipeline (3) with the rod chamber of another oil cylinder (2), and rod chamber that this two oil cylinder (2) is not connected and rodless cavity then are connected with an actuator port (5) of all-hydraulic steering gear (6) respectively; All there is a blind hole that is used to form valve pocket at piston (4) two ends of each oil cylinder (2), and the oral area of each blind hole all has a valve pocket (12); This valve pocket be the sealing shape insert in the blind hole and its outer end mutually concordant with the respective end of piston (4), its outer section diameter is less than inner segment, thus the chamber is near oral area place formation circumferential step within it; Push rod (13) is arranged in the valve pocket (12), and outer section diameter of this push rod be less than inner segment, thereby form circumferential step on its cylindrical, and inside and outside section of push rod (13) is with the inside and outside intersegmental gapped of valve pocket (12) and be bearing fit; Spring (11) and spherical valve core (10) are arranged in the blind hole, the two ends of spring (11) respectively with at the bottom of the hole of blind hole and spherical valve core (10) offset, and spherical valve core (10) gets lodged on the inner end of valve pocket (12) and and push rod (13) inner end between leave the gap; Stretch out outside the respective end of piston (4) outer end of push rod (13), and its length of stretching out is greater than the gap between spherical valve core (10) 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 |
|---|---|---|---|
| CNA2007100239506A CN101332831A (en) | 2007-06-28 | 2007-06-28 | Fork-truck steering and balancing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100239506A CN101332831A (en) | 2007-06-28 | 2007-06-28 | Fork-truck steering and balancing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101332831A true CN101332831A (en) | 2008-12-31 |
Family
ID=40195774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100239506A Pending CN101332831A (en) | 2007-06-28 | 2007-06-28 | Fork-truck steering and balancing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101332831A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830412A (en) * | 2010-04-22 | 2010-09-15 | 杨鹏波 | Novel multipurpose traction forklift |
| CN102351004A (en) * | 2011-07-26 | 2012-02-15 | 浙江吉利汽车研究院有限公司 | Automobile power-assisted steering system |
| CN102975765A (en) * | 2011-11-21 | 2013-03-20 | 芜湖瑞创叉车有限公司 | Forklift hydraulic control steering balancing device |
-
2007
- 2007-06-28 CN CNA2007100239506A patent/CN101332831A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101830412A (en) * | 2010-04-22 | 2010-09-15 | 杨鹏波 | Novel multipurpose traction forklift |
| CN101830412B (en) * | 2010-04-22 | 2013-01-23 | 杨鹏波 | Novel multipurpose traction forklift |
| CN102351004A (en) * | 2011-07-26 | 2012-02-15 | 浙江吉利汽车研究院有限公司 | Automobile power-assisted steering system |
| CN102975765A (en) * | 2011-11-21 | 2013-03-20 | 芜湖瑞创叉车有限公司 | Forklift hydraulic control steering balancing device |
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| Date | Code | Title | Description |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081231 |