CN109236766B - Hydraulic system of lateral fork lift type wrecker - Google Patents
Hydraulic system of lateral fork lift type wrecker Download PDFInfo
- Publication number
- CN109236766B CN109236766B CN201811176034.0A CN201811176034A CN109236766B CN 109236766 B CN109236766 B CN 109236766B CN 201811176034 A CN201811176034 A CN 201811176034A CN 109236766 B CN109236766 B CN 109236766B
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- fork
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- 239000003921 oil Substances 0.000 claims description 48
- 239000010720 hydraulic oil Substances 0.000 claims description 22
- 230000001360 synchronised effect Effects 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 8
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000001174 ascending effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/023—Excess flow valves, e.g. for locking cylinders in case of hose burst
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention relates to a hydraulic system of a lateral fork lift type wrecker, belonging to the technical field of special vehicle manufacturing. The invention is formed by gear pump, unloading valve, multiple way valve A, multiple way valve B and multiple way valve C, the power takeoff is connected to chassis, the power takeoff is connected with gear pump, the gear pump is communicated with oil storage tank through the oil pipe, the oil outlet of the gear pump is connected with multiple way valve A, multiple way valve B and multiple way valve C through the unloading valve respectively; the oil ports of the actuating elements of the multi-way valve A, the multi-way valve B and the multi-way valve C are respectively connected to each actuating element through oil pipe control, and the flow of each actuating element is controlled according to the related requirements of the operation of the side fork lift type wrecker so as to achieve the fork lift synchronism meeting the operation requirements. The hydraulic power system takes hydraulic pressure as a whole vehicle power source and has the characteristics of compact structure, light weight, high power density and easiness in arrangement; the high synchronism of the related execution elements improves the fork lift safety.
Description
Technical Field
The invention relates to a hydraulic system of a lateral fork lift type wrecker, belonging to the technical field of special vehicle manufacturing.
Background
For the side fork lift type wrecker with a complex mechanism, the control operation of each actuating mechanism is required to be accurate, otherwise, the problem of property damage caused by fork lift goods rollover occurs when the side fork lift type wrecker is light, and the safety accident occurs when the side fork lift type wrecker is heavy, so that development of a hydraulic system is urgently needed to realize safety, reliability, high efficiency, energy conservation and stability of the system, and meanwhile, the hydraulic system also has an emergency function.
Disclosure of Invention
The invention aims to provide a lateral fork lift type wrecker hydraulic system which is reliable and simple to control and can ensure that each actuating mechanism is accurately positioned in order to overcome the defects of the prior art.
The invention realizes the aim through the following technical scheme:
the hydraulic system of the lateral fork lift type wrecker consists of an oil storage tank, a gear pump, an unloading valve, a multi-way valve A, a multi-way valve B, a multi-way valve C, a balance valve, a synchronous valve, a bidirectional overflow valve and an oil return tank, wherein a power takeoff is connected to a chassis, and the hydraulic system is characterized in that: the power takeoff is connected with the gear pump, the gear pump is communicated with the oil storage tank through an oil pipe, and an oil outlet of the gear pump is respectively connected with the multi-way valve A, the multi-way valve B and the multi-way valve C through unloading valves; the hydraulic ports A1 and B1 of the multi-way valve A are connected in series through a balance valve to form a front left fork hydraulic motor and a front right fork hydraulic motor, and the hydraulic ports A2 and B2 of the multi-way valve A are provided with a front swing arm opening and closing cylinder through a hydraulic lock; the hydraulic oil ports A3 and B3 of the multi-way valve B are provided with a front hydraulic support leg and a rear hydraulic support leg in parallel through a synchronous valve, the hydraulic oil ports A4 and B4 of the multi-way valve B are provided with a front horizontal type portal frame longitudinal moving hydraulic cylinder through a hydraulic lock, the hydraulic oil ports A5 and B5 of the multi-way valve B are provided with a front portal frame hydraulic motor and a rear portal frame hydraulic motor in parallel through a two-way overflow valve and a synchronous valve, the hydraulic oil ports A6 and B6 of the multi-way valve B are provided with a rear swing arm opening and closing cylinder through a hydraulic lock, the hydraulic oil ports A7 and B7 of the multi-way valve B are provided with a front lifting hydraulic cylinder and a rear lifting hydraulic cylinder in parallel through a one-way throttle valve and a synchronous valve, and the hydraulic oil ports A8 and B8 of the multi-way valve B are provided with a rear left fork hydraulic motor and a rear right fork hydraulic motor in series through a balance valve; the oil ports A9, B9 oil ports A10 and B10 of the multi-way valve C are standby connecting oil ports of the actuating mechanism; and oil return ports T of the multi-way valve A, the multi-way valve B and the multi-way valve C are respectively connected to an oil return tank through oil pipes and unloading valves.
The unloading valve is connected with an electrical system.
The multi-way valve A, the multi-way valve B and the multi-way valve C are respectively connected and controlled by an electric system and are provided with a manual control rod.
The front lifting hydraulic cylinder and the rear lifting hydraulic cylinder control the lifting speed of the front portal frame and the rear portal frame to be 0.1-0.2m/s, and the descending speed to be 0.05-0.1m/s.
The front lifting hydraulic cylinder and the rear lifting hydraulic cylinder control the lifting speed of the front portal frame and the rear portal frame to be 0.15m/s, and the descending speed to be 0.075m/s.
The front left fork hydraulic motor, the front right fork hydraulic motor, the rear left fork hydraulic motor and the rear right fork hydraulic motor control the moving speed of the corresponding forks to be 0.25-0.5m/s.
The front left fork hydraulic motor, the front right fork hydraulic motor, the rear left fork hydraulic motor and the rear right fork hydraulic motor control the moving speed of the corresponding forks to be 0.3-0.35m/s.
The speed of the horizontal portal assembly is 0.1-0.4 m/s during the movement controlled by the front horizontal portal longitudinal movement hydraulic cylinder.
The speed of the horizontal portal assembly is 0.15-0.2 m/s during the controlled movement of the front horizontal portal longitudinal movement hydraulic cylinder.
Compared with the prior art, the invention has the beneficial effects that:
the hydraulic system of the lateral fork lift type wrecker takes hydraulic pressure as a whole vehicle power source, has the characteristics of compact structure, light weight, high power density and easy arrangement, can be switched between a driving state and a working state, and can only speed up an engine when a fork frame ascends, and other actions are all performed at idle speed, so that the service life of the hydraulic system is greatly prolonged, and meanwhile, heat is reduced, energy is saved and emission is reduced; the hydraulic system of the lateral fork lift type obstacle clearing vehicle can synchronize the lateral movement of each group of forks, synchronize the lateral movement of the two groups of lifting mechanisms and the lateral movement of the portal frame, ensure the stability in the fork lift operation process and improve the fork lift safety.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. the hydraulic truck comprises an oil storage tank, 2, a gear pump, 3, an unloading valve, 4, a multiple-way valve A,5, a multiple-way valve B,6, a multiple-way valve C,7, a balance valve, 8, a synchronous valve, 9, a two-way overflow valve, 10, an oil return tank, 11, a power takeoff, 12, a chassis, 13, a front left fork hydraulic motor, 14, a front right fork hydraulic motor, 15, a hydraulic lock, 16, a front swing arm opening and closing cylinder, 17, an electromagnetic ball valve, 18, a front hydraulic support leg, 19, a rear hydraulic support leg, 20, a front horizontal type portal longitudinal moving hydraulic cylinder, 21, a front portal frame hydraulic motor, 22, a rear portal frame hydraulic motor, 23, a rear swing arm opening and closing cylinder, 24, a one-way throttle valve, 25, a front lifting hydraulic cylinder, 26, a rear lifting hydraulic cylinder, 27, a rear left fork hydraulic motor, 28 and a rear right fork hydraulic motor.
Detailed Description
The hydraulic system of the side fork lift type wrecker consists of an oil storage tank 1, a gear pump 2, an unloading valve 3, a multi-way valve A4, a multi-way valve B5, a multi-way valve C6, a balance valve 7, a synchronous valve 8, a two-way overflow valve 9 and an oil return tank 10, wherein a power takeoff 11 is connected to a chassis 12, the power takeoff 11 is connected with the gear pump 2, the gear pump 2 is communicated with the oil storage tank 1 through an oil pipe, an oil outlet of the gear pump 2 is respectively connected with the multi-way valve A4, the multi-way valve B5 and the multi-way valve C6 through the unloading valve 3, the power takeoff 11 is pneumatically controlled, the operation is simple and convenient, the power takeoff 11 is disconnected in the driving process, the gear pump 2 does not work, the service life of the gear pump 2 is greatly prolonged, and the heating problem of the system is reduced; when the execution mechanism does not work, the hydraulic system is in an unloading state, the unloading valve 3 is connected with the electric system, when the emergency stop button is pressed, the unloading valve 3 is forcedly powered off, the hydraulic system stops acting, and meanwhile, the safety protection function is achieved;
the oil ports A1 and B1 of the multi-way valve A4 are serially connected with a front left fork hydraulic motor 13 and a front right fork hydraulic motor 14 through a balance valve 7, the oil ports A8 and B8 of the multi-way valve B5 are serially connected with a rear left fork hydraulic motor 27 and a rear right fork hydraulic motor 28 through the balance valve 7, the displacement of the four fork hydraulic motors is the same, and the high-precision synchronization of the motors can be realized, so that the synchronization of the transverse movement of the forks is realized, and the moving speed of the forks is controlled to be 0.25-0.5m/s, preferably 0.3-0.35m/s through each motor; the balance valve 7 can prevent the fork from freely moving, so that the safety is ensured;
the hydraulic locks 15 are arranged on the oil ports A2 and B2 of the multi-way valve A4, the front swing arm opening and closing oil cylinders 16 are arranged on the hydraulic locks 15, the rear swing arm opening and closing oil cylinders 23 are arranged on the oil ports A6 and B6 of the multi-way valve B5, the independent control of the fork spacing can be realized, the spacing of the fork can be completely matched, the hydraulic locks 15 arranged on the oil paths can ensure the fork spacing locking, and the safety and stability performance can be improved;
the oil ports A3 and B3 of the multi-way valve B5 are connected in parallel with a front hydraulic supporting leg 18 and a rear hydraulic supporting leg 19 through a synchronous valve 8, and are used for supporting front and rear fork frame guide rails, and the synchronous valve 8 enables two supporting leg oil cylinders to be basically synchronous, so that uneven load is prevented from distorting a girder of a vehicle body;
the oil ports A4 and B4 of the multi-way valve B5 are provided with a front horizontal type portal longitudinal moving hydraulic cylinder 20 through a hydraulic lock 15, the speed of the movable horizontal type portal assembly is controlled to be 0.1-0.4 m/s, preferably 0.15-0.2 m/s, the distance between two groups of fork frames can be adjusted at will, the distance between the two groups of fork frames is matched, the front horizontal type portal longitudinal moving hydraulic cylinder 20 is provided with the hydraulic lock 15, and the free movement of the front movable horizontal type portal assembly is prevented, so that the safety effect is realized;
the oil ports A5 and B5 of the multi-way valve B5 are connected in parallel with a front portal frame hydraulic motor 21 and a rear portal frame hydraulic motor 22 through a bidirectional overflow valve 9 and a synchronous valve 8, the synchronous valve 8 enables the inlet flow of the motors to be the same, the portal frames carry fork frames to synchronously move transversely, and the bidirectional overflow valve 9 can reduce the impact when the fork frames move transversely to the end point; the front portal frame hydraulic motor and the rear portal frame hydraulic motor are respectively provided with a balance valve 7, so that the fork frame is prevented from freely moving, and a safety effect is achieved;
the oil ports A7 and B7 of the multi-way valve B5 are connected in parallel with the front lifting hydraulic cylinder 25 and the rear lifting hydraulic cylinder 26 through the one-way throttle valve 24 and the synchronous valve 8, when the fork frame ascends, the speed of the engine is controlled to be increased through electric interlocking, so that the rotating speed of the gear pump 2 is increased, the flow rate is increased to match the flow rate required by the synchronous valve 8, the double-cylinder synchronous precision is within 2%, the asynchronous phenomenon caused by different loads of the front fork and the rear fork is eliminated, the fork is ensured to be basically kept horizontal, the tipping is prevented, the ascending speed of the front and the rear portal frames is controlled to be 0.1-0.2m/s, the descending speed is controlled to be 0.05-0.1m/s, the ascending speed is preferably 0.15m/s, the descending speed is 0.075m/s, the electromagnetic ball valves 17 are arranged on the front lifting hydraulic cylinder 25 and the rear lifting hydraulic cylinder 26, the power-off self-locking is realized, and the falling goods are prevented;
the oil ports A9, B9 oil ports A10 and B10 of the multi-way valve C6 are standby connecting oil ports of the actuating mechanism;
the oil return ports T of the multi-way valve A4, the multi-way valve B5 and the multi-way valve C6 are respectively connected to the oil return tank 10 through oil pipes and the unloading valve 3, the multi-way valve A4, the multi-way valve B5 and the multi-way valve C6 are respectively connected and controlled by an electric system and are provided with manual control rods, at ordinary times, all actions are controlled by electricity, and when the electric system fails, all actions can be completed by means of the manual control rods.
The above description is merely a preferred embodiment of the present invention, and the above illustration is not to be construed as limiting the spirit of the present invention in any way, and any simple modification or variation of the above embodiments according to the technical spirit of the present invention, and equivalent embodiments that may be changed or modified to equivalent variations using the above disclosed technical spirit of the present invention, will still fall within the scope of the technical solutions of the present invention, without departing from the spirit and scope of the present invention.
Claims (3)
1. The utility model provides a side direction fork lifts formula wrecker hydraulic system, it comprises oil storage tank (1), gear pump (2), off-load valve (3), multiple unit valve A (4), multiple unit valve B (5), multiple unit valve C (6), balanced valve (7), synchronous valve (8), two-way overflow valve (9) and return oil tank (10), and power takeoff (11) are connected on chassis (12), its characterized in that: the power takeoff (11) is connected with the gear pump (2), the gear pump (2) is communicated with the oil storage tank (1) through an oil pipe, and an oil outlet of the gear pump (2) is respectively connected with the multi-way valve A (4), the multi-way valve B (5) and the multi-way valve C (6) through the unloading valve (3); the hydraulic oil ports A1 and B1 of the multi-way valve A (4) are connected in series through a balance valve (7) and are provided with a front left fork hydraulic motor (13) and a front right fork hydraulic motor (14), and the hydraulic oil ports A2 and B2 of the multi-way valve A (4) are provided with a front swing arm opening and closing oil cylinder (16) through a hydraulic lock (15); the hydraulic oil port A3 and the hydraulic oil port B3 of the multi-way valve B (5) are provided with a front hydraulic supporting leg (18) and a rear hydraulic supporting leg (19) in parallel through a synchronous valve (8), the hydraulic oil port A4 and the hydraulic oil port B4 of the multi-way valve B (5) are provided with a front horizontal type portal frame longitudinal moving hydraulic oil cylinder (20) through a hydraulic lock (15), the hydraulic oil port A5 and the hydraulic oil port B5 of the multi-way valve B (5) are provided with a front portal frame hydraulic motor (21) and a rear portal frame hydraulic motor (22) in parallel through a bidirectional overflow valve (9) and a synchronous valve (8), the hydraulic oil port A6 and the hydraulic oil port B6 of the multi-way valve B (5) are provided with a rear swing arm switching hydraulic cylinder (23) through a hydraulic lock (15), the hydraulic oil port A7 and the hydraulic oil port B7 of the multi-way valve B (5) are provided with a front lifting hydraulic oil cylinder (25) and a rear lifting hydraulic oil cylinder (26) in parallel through a one-way throttle valve (24) and a synchronous valve (8), and the hydraulic oil port A8 of the multi-way valve B (5) is provided with a rear left fork hydraulic motor (27) and a rear right fork motor (28) in series through a balance valve (8); the oil ports A9, B9 oil ports A10 and B10 of the multi-way valve C (6) are standby connection oil ports of the actuating mechanism; the oil return ports T of the multi-way valve A (4), the multi-way valve B (5) and the multi-way valve C (6) are respectively connected to an oil return tank through oil pipes and unloading valves (3);
the front lifting hydraulic cylinder (25) and the rear lifting hydraulic cylinder (26) control the lifting speed of the front portal frame and the rear portal frame to be 0.1-0.2m/s, and the descending speed to be 0.05-0.1m/s;
the front lifting hydraulic cylinder (25) and the rear lifting hydraulic cylinder (26) control the lifting speed of the front portal frame and the rear portal frame to be 0.15m/s, and the descending speed to be 0.075m/s;
the front left fork hydraulic motor (13), the front right fork hydraulic motor (14), the rear left fork hydraulic motor (27) and the rear right fork hydraulic motor (28) control the moving speed of the corresponding forks to be 0.25-0.5m/s;
the front left fork hydraulic motor (13), the front right fork hydraulic motor (14), the rear left fork hydraulic motor (27) and the rear right fork hydraulic motor (28) control the moving speed of the corresponding forks to be 0.3-0.35m/s;
the speed of the horizontal portal assembly is 0.1-0.4 m/s when the front horizontal portal longitudinally moves under the control of the hydraulic cylinder (20);
the speed of the horizontal portal assembly is 0.15-0.2 m/s when the front horizontal portal longitudinally moves under the control of the hydraulic cylinder (20).
2. The hydraulic system of the lateral fork lift type wrecker, as set forth in claim 1, wherein: the unloading valve (3) is connected with an electrical system.
3. The hydraulic system of the lateral fork lift type wrecker, as set forth in claim 1, wherein: the multi-way valve A (4), the multi-way valve B (5) and the multi-way valve C (6) are respectively connected and controlled by an electric system and are provided with a manual control rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811176034.0A CN109236766B (en) | 2018-10-10 | 2018-10-10 | Hydraulic system of lateral fork lift type wrecker |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811176034.0A CN109236766B (en) | 2018-10-10 | 2018-10-10 | Hydraulic system of lateral fork lift type wrecker |
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| Publication Number | Publication Date |
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| CN109236766A CN109236766A (en) | 2019-01-18 |
| CN109236766B true CN109236766B (en) | 2024-03-26 |
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| CN108298474A (en) * | 2017-12-26 | 2018-07-20 | 浙江大学 | A kind of fork truck energy saving system with speed-regulating function |
| CN108502816A (en) * | 2018-05-08 | 2018-09-07 | 安徽合力股份有限公司 | Bypass type energy regeneration forklift hydraulic system |
| CN108466983A (en) * | 2018-06-05 | 2018-08-31 | 安徽合力股份有限公司 | It is a kind of to decline the recyclable forklift hydraulic system of energy |
| CN208831355U (en) * | 2018-10-10 | 2019-05-07 | 湖北先行专用汽车有限公司 | A kind of side fork lifts formula and removes obstacles vehicle hydraulic system |
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