CN105819373A - Novel hydraulic system of forklift - Google Patents
Novel hydraulic system of forklift Download PDFInfo
- Publication number
- CN105819373A CN105819373A CN201610308405.0A CN201610308405A CN105819373A CN 105819373 A CN105819373 A CN 105819373A CN 201610308405 A CN201610308405 A CN 201610308405A CN 105819373 A CN105819373 A CN 105819373A
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- CN
- China
- Prior art keywords
- oil pump
- gear oil
- control valves
- direction control
- outlet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
- B66F9/22—Hydraulic devices or systems
Abstract
The invention provides a novel hydraulic system of a forklift. The novel hydraulic system of the forklift comprises a gearbox, gear oil pumps, an oil box, a braking pump, a multi-way valve and tilting oil cylinders, wherein the gear oil pumps comprise a back gear oil pump and a front gear oil pump; an inlet of the back gear oil pump communicates with the oil box through a first rubber hose; a first outlet of the back gear oil pump is connected with an inlet of the front gear oil pump; a second outlet of the back gear oil pump communicates with a unidirectional stable-flow valve through a second rubber hose; the second outlet of the back gear oil pump is divided into two ways through the unidirectional stable-flow valve; one way communicates with the braking pump through a third rubber hose; the other way communicates with a side inlet of the multi-way valve through a fourth rubber hose; an outlet of the front gear oil pump communicates with a frontal inlet of the multi-way valve through a fifth rubber hose; and the multi-way valve communicates with the oil box through an oil return pipe. According to the novel hydraulic system of the forklift, oil ways are controlled by adopting the two gear oil pumps, and not only can the braking stability be realized, but also an oil mass can be reasonably distributed according to a flow rate needed for each function.
Description
Technical field
The present invention relates to fork truck technical field, be specifically related to a kind of for novel forklift hydraulic system.
Background technology
The major function of fork truck is fork picking thing, promotes goods, and by goods handling to destination, in this range of motion of fork truck, hydraulic system is transmitted by hydraulic oil, completes a whole set of work.
Hydraulic system is mainly made up of gear oil pump, banked direction control valves, oil cylinder, high-pressure rubber pipe and low pressure hose, joint, unidirectional flow stabilizing valve, hydraulic oil container etc..Operation principle is: motor-driven gear oil pump, when the engine runs, and driven gear oil pump, gear oil pump is transported to brake pump from fuel tank by oil sucking-off and by a pipeline part, by brake pedal control, the hydraulic oil entering brake pump is sent in drive axle, it is achieved fork truck is braked；A part is to being transported to banked direction control valves, and the fluid part in banked direction control valves flows to turn to and realizes fork-truck steering, and a part is hoisted, it is achieved the rising of door frame, and a part is given and dump ram, it is achieved tilt before and after door frame.These parts are arranged at the internal different parts of fork truck respectively, and because fork truck inner space is limited, layout is that comparison is complicated.Meanwhile, using a moving gear oil pump to drive oil circuit, the operational stability of vehicle is poor.
Summary of the invention
The present invention provides a kind of novel forklift hydraulic system, uses two gear oil pumps to carry out oil circuit control, effectively solves the stability of fork truck braking.
For solving above-mentioned technical problem, the present invention adopts the following technical scheme that
nullA kind of novel forklift hydraulic system，Including change speed gear box and use the gear oil pump that this change speed gear box drives，Described gear oil pump connects fuel tank respectively by pipe-line system、Brake pump and banked direction control valves，This banked direction control valves connects with dump ram，Described gear oil pump includes being arranged in the backgear oil pump on two power taking mouths of described change speed gear box and front gear oil pump，The entrance of described backgear oil pump is connected with described fuel tank by the first sebific duct，First outlet of described backgear oil pump is connected with the entrance of described front gear oil pump，Second outlet of described backgear oil pump is connected with unidirectional flow stabilizing valve by the second sebific duct，It is divided into two-way by this unidirectional flow stabilizing valve，The 3rd sebific duct of leading up to connects with brake pump，The 4th sebific duct of separately leading up to connects with the side inlet of banked direction control valves，Described front gear oil delivery side of pump is connected with the front entrance of banked direction control valves by the 5th sebific duct，Described banked direction control valves is connected with described fuel tank by oil return pipe.
Further, the front outlet of described banked direction control valves is connected with the dump ram of both sides by six-way joint.
Further, two threeways in described six-way joint includes joint body and is arranged on this joint body and arranged up and down, the entrance of this threeway respectively with the front outlet of banked direction control valves, two outlets of this threeway connect with head and the bottom of dump ram respectively, for driving the flexible of dump ram.
Preferably, the entrance of said two threeway is positioned at the homonymy of joint body.
From above technical scheme, the present invention uses two gear oil pumps to carry out oil circuit control, can stably transmit hydraulic oil, by a set of succinct oil circuit method for arranging, the braking that hydraulic oil carries and realizes fork truck respectively, the function turning to, hoist and tilting, the stability of braking, the uninterrupted that can need again, reasonable distribution oil mass can be realized according to various functions.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the schematic diagram of six-way joint in the present invention.
In figure: 1, change speed gear box, 2, gear oil pump, 21, backgear oil pump, 22, front gear oil pump, 3, fuel tank, 4, brake pump, 5, banked direction control valves, 6, dump ram, the 71, first sebific duct, the 72, second sebific duct, 73, the 3rd sebific duct, the 74, the 4th sebific duct, the 75, the 5th sebific duct, 76, unidirectional flow stabilizing valve, 77, oil return pipe, 8, six-way joint, 81, joint body, the 82, first elbow, the 83, second elbow.
Detailed description of the invention
Below in conjunction with the accompanying drawings a kind of preferred implementation of the present invention is described in detail.
As it is shown in figure 1, described forklift hydraulic system includes change speed gear box 1, gear oil pump 2, fuel tank 3, brake pump 4, banked direction control valves 5, dump ram 6 and for connecting the pipe-line system of said mechanism.
Described gear oil pump 2 includes being arranged in the front gear oil pump 22 on 1 two power taking mouths of change speed gear box and backgear oil pump 21, the positive and negative rotation direction of forward and backward gear oil pump, and electromotor drives, and drives change speed gear box, and power is passed to forward and backward gear oil pump and is operated by change speed gear box.The entrance of described backgear oil pump 21 is connected with described fuel tank 3 by the first sebific duct 71, fuel tank passes through the first sebific duct by hydraulic oil sucking-off to backgear oil pump, first outlet of backgear oil pump 21 is connected with the entrance of described front gear oil pump 22, second outlet of backgear oil pump 21 is connected with unidirectional flow stabilizing valve 76 by the second sebific duct 72, it is divided into two oil circuits by this unidirectional flow stabilizing valve, the 3rd sebific duct 73 of leading up to connects with brake pump 4, the 4th sebific duct 74 of separately leading up to connects with the side inlet of banked direction control valves 5, the outlet of described front gear oil pump 22 is connected with the front entrance of banked direction control valves 5 by the 5th sebific duct 75.Described banked direction control valves 5 carries out oil return by oil return pipe 77, is back in fuel tank 3, forms a closed loop.
Towards the hydraulic oil of brake pump 4 through the shunting of unidirectional flow stabilizing valve 76, when brake, stepping on brake pedal, hydraulic oil can be sent in the propons brakes of fork truck smoothly, and fork truck brake system will compare steadily, will not form jitter phenomenon.
Behind hydraulic oil interflow in described banked direction control valves 5, the front outlet of banked direction control valves is connected with the dump ram 6 of both sides by six-way joint 8, and the front outlet of banked direction control valves also connects with steering cylinder and lift oil tank.Described first sebific duct the 71, second sebific duct the 72, the 3rd sebific duct the 73, the 4th sebific duct the 74, the 5th sebific duct 75, unidirectional flow stabilizing valve 76, oil return pipe 77 and six-way joint 8 collectively constitute pipe-line system.
Two threeways in described six-way joint 8 includes joint body 81 and is arranged on this joint body and arranged up and down, the entrance of this threeway respectively with the front outlet of banked direction control valves, two outlets of this threeway connect with head and the bottom of dump ram respectively, for driving the flexible of dump ram, the entrance of two of which threeway is positioned at the homonymy of joint body.
Described dump ram 6 is symmetrically arranged on fork truck body, and bottom is fixed on vehicle frame, and front end is connected with door frame by earrings, is double piston cylinder, and the hypsokinesis action of leaning forward of dump ram door frame to be realized, the two action is required for from banked direction control valves fuel feeding.When door frame needs to lean forward, hydraulic oil is by the first elbow 82 oil suction in six-way joint 8, and fuel feeding is to left and right joint, then by left and right high-pressure rubber pipe, arrives bottom dump ram, promote bottom piston, and the piston rod of dump ram stretches out, it is achieved lean forward；In like manner, when door frame needs hypsokinesis, hydraulic oil arrives dump ram head by the second elbow 83 oil suction in six-way joint, fuel feeding, promotes head piston, and piston rod is retracted, it is achieved hypsokinesis.
The above embodiment is only to be described the preferred embodiment of the present invention; not the scope of the present invention is defined; on the premise of designing spirit without departing from the present invention; various deformation that technical scheme is made by those of ordinary skill in the art and improvement, all should fall in the protection domain that claims of the present invention determines.
Claims (4)
- null1. a novel forklift hydraulic system，Including change speed gear box (1) and use the gear oil pump that this change speed gear box drives，Described gear oil pump (2) connects fuel tank (3) respectively by pipe-line system、Brake pump (4) and banked direction control valves (5)，This banked direction control valves connects with dump ram (6)，It is characterized in that，Described gear oil pump (2) includes being arranged in the backgear oil pump (21) on (1) two power taking mouth of described change speed gear box and front gear oil pump (22)，The entrance of described backgear oil pump (21) is connected with described fuel tank (3) by the first sebific duct (71)，First outlet of described backgear oil pump (21) is connected with the entrance of described front gear oil pump (22)，Second outlet of described backgear oil pump (21) is connected with unidirectional flow stabilizing valve (76) by the second sebific duct (72)，It is divided into two-way by this unidirectional flow stabilizing valve，The 3rd sebific duct (73) of leading up to connects with brake pump (4)，The 4th sebific duct (74) of separately leading up to connects with the side inlet of banked direction control valves (5)，The outlet of described front gear oil pump (22) is connected with the front entrance of banked direction control valves (5) by the 5th sebific duct (75)，Described banked direction control valves (5) is connected with described fuel tank (3) by oil return pipe (77).
- Forklift hydraulic system the most according to claim 1, it is characterised in that the front outlet of described banked direction control valves (5) is connected with the dump ram (6) of both sides by six-way joint (8).
- Forklift hydraulic system the most according to claim 2, it is characterized in that, two threeways in described six-way joint (8) includes joint body (81) and is arranged on this joint body and arranged up and down, the entrance of this threeway respectively with the front outlet of banked direction control valves (5), two outlets of this threeway connect with head and the bottom of dump ram (6) respectively, for driving the flexible of dump ram.
- 4. the forklift hydraulic system stated according to claim 3, it is characterised in that the entrance of said two threeway is positioned at the homonymy of joint body (81).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610308405.0A CN105819373B (en) | 2016-05-11 | 2016-05-11 | A kind of new forklift hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610308405.0A CN105819373B (en) | 2016-05-11 | 2016-05-11 | A kind of new forklift hydraulic system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105819373A true CN105819373A (en) | 2016-08-03 |
| CN105819373B CN105819373B (en) | 2018-01-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610308405.0A Active CN105819373B (en) | 2016-05-11 | 2016-05-11 | A kind of new forklift hydraulic system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210070U (en) * | 1987-07-11 | 1988-10-26 | 浙江省丽水地区计算机应用研究所 | Tandem metering pump unit |
| EP2357384A1 (en) * | 2010-02-09 | 2011-08-17 | JATCO Ltd | Oil pump with air vent structure |
| CN103047131A (en) * | 2013-01-25 | 2013-04-17 | 江铃汽车股份有限公司 | Double braking and steering pump |
| CN105036009A (en) * | 2015-09-21 | 2015-11-11 | 安庆联动属具股份有限公司 | Tipping rack with improved oil way structure |
| CN205204771U (en) * | 2015-12-11 | 2016-05-04 | 安徽好运机械有限公司 | Fork truck is with integral slope steel pipe assembly |
| CN205603166U (en) * | 2016-05-11 | 2016-09-28 | 安徽好运机械有限公司 | Novel fork truck hydraulic system |
-
2016
- 2016-05-11 CN CN201610308405.0A patent/CN105819373B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87210070U (en) * | 1987-07-11 | 1988-10-26 | 浙江省丽水地区计算机应用研究所 | Tandem metering pump unit |
| EP2357384A1 (en) * | 2010-02-09 | 2011-08-17 | JATCO Ltd | Oil pump with air vent structure |
| CN103047131A (en) * | 2013-01-25 | 2013-04-17 | 江铃汽车股份有限公司 | Double braking and steering pump |
| CN105036009A (en) * | 2015-09-21 | 2015-11-11 | 安庆联动属具股份有限公司 | Tipping rack with improved oil way structure |
| CN205204771U (en) * | 2015-12-11 | 2016-05-04 | 安徽好运机械有限公司 | Fork truck is with integral slope steel pipe assembly |
| CN205603166U (en) * | 2016-05-11 | 2016-09-28 | 安徽好运机械有限公司 | Novel fork truck hydraulic system |
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| Publication number | Publication date |
|---|---|
| CN105819373B (en) | 2018-01-19 |
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