CN105774540B - A kind of all-hydraulic-driven road sweeper walking high and low speed switching device - Google Patents
A kind of all-hydraulic-driven road sweeper walking high and low speed switching device Download PDFInfo
- Publication number
- CN105774540B CN105774540B CN201610286689.8A CN201610286689A CN105774540B CN 105774540 B CN105774540 B CN 105774540B CN 201610286689 A CN201610286689 A CN 201610286689A CN 105774540 B CN105774540 B CN 105774540B
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- low speed
- valve
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- directional control
- speed switching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/34—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles
- B60K17/356—Arrangement or mounting of transmissions in vehicles for driving both front and rear wheels, e.g. four wheel drive vehicles having fluid or electric motor, for driving one or more wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K23/00—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for
- B60K23/08—Arrangement or mounting of control devices for vehicle transmissions, or parts thereof, not otherwise provided for for changing number of driven wheels, for switching from driving one axle to driving two or more axles
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Arrangement And Driving Of Transmission Devices (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a kind of all-hydraulic-driven road sweeper walking high and low speed switching device, including the enclosed pump being connected with hydraulic oil container and the high low speed switching valve being connected with the A mouths of enclosed pump；Enclosed pump includes being connected with slippage pump and the plunger pump of flushing valve, and high low speed switching valve includes two position, three-way electromagnetic change valve, two-position three way pilot operated directional control valve and two-position four-way pilot operated directional control valve.Driven by two and the high low speed switching of travel speed is realized in the switchings of 4 wheel driven, use 4 wheel driven under work pattern of sweeping the floor, speed is slow；Use two front-wheel drives under transition pattern, transition speed is fast；The high low speed switching of four-wheel drive road sweeper is realized, row speed governing can be switched into by engine speed, discharge of main pump and high low speed, speed adjustable range is big.And tire wear phenomenon caused by interior outer wheel speeds are inconsistent when the steering brought due to body frame structure for automotive being not present under any pattern, it is equally applicable to the road sweeper on monoblock type chassis.
Description
Technical field
The present invention relates to a kind of road sweeper hydraulic system, more particularly to a kind of high low speed of all-hydraulic-driven road sweeper walking
Switching device, belong to road sweeper travelling control hydraulic system technical field.
Background technology
At present, based on the cleaning in the street lane in most domestic city, park, square, pavement is typically cleaned with manpower；With
The development in city and the rising of cost of labor, this traditional manpower cleaning method is increasingly higher by cleaning machine degree
Road sweeper replace.Existing small-sized all-hydraulic-driven road sweeper is not only compact-sized, simple to operate, sweeping efficiency is high, and
Road sweeper typically uses the hydrostatic vibration hydraulic system of enclosed, and it uses the fluid motor-driven being arranged on tire；And four-wheel
For the road sweeper of driving because its driving force is big, application is more and more extensive.
When road sweeper carries out cleaning work or climbing, it is desirable to which travel speed is slow, driving force is big, and transition speed is then required during transition
Degree is fast.
In the prior art, the structure on its articulation steering chassis is as shown in figure 1, using frame hinging base plate, four-wheel drive；Its hydraulic pressure
Wheel motor is in parallel before type of drive uses two, and wheel motor is in parallel after two, the motor connected mode that front and back wheel is connected again, such as Fig. 2 institutes
Show.The walking manner of this road sweeper has the disadvantage that：Speed adjustable range is narrow, and road speed regulation can only be by engine speed and master
Pumpage is adjusted, and is adjusted without high low gear.In operation process, travel speed needs to control to reach preferable operation effectiveness
Relatively low travel speed and higher engine speed, this needs operator that hand throttle is moved to the position of increasing to increase to start
Machine rotating speed, at the same it is light step on pedal to maintain less travel speed, under this work pattern by gently step on pedal maintain compared with
The operation pole of low travel speed is unfavorable for control of the operator to operation driving of sweeping the floor.
The content of the invention
It is a primary object of the present invention to overcome deficiency of the prior art, there is provided a kind of all-hydraulic drive of new structure
Dynamic road sweeper walking high and low speed switching device, especially suitable for frame hinging base plate or the four-wheel drive road sweeper on monoblock type chassis.
The technical problems to be solved by the invention are to provide compact-sized, convenient disassembly, made easily, securely and reliably, in fact
With the strong all-hydraulic-driven road sweeper walking high and low speed switching device of property, it can be driven by two and travel speed is realized in the switchings of 4 wheel driven
The switching of high low speed, use 4 wheel driven under work pattern of sweeping the floor, speed is slow；Two front-wheel drives, transition are used under transition pattern
Speed is fast；And interior outer wheel speeds inconsistent caused wheel when under any pattern in the absence of the steering brought due to body frame structure for automotive
Tire wear phenomenon, it is equally applicable to the road sweeper on monoblock type chassis.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of all-hydraulic-driven road sweeper is walked high and low speed switching device, including the enclosed pump that is connected with hydraulic oil container and with
The connected high low speed switching valve of the A mouths of enclosed pump；The A mouths of the enclosed pump oil inlet and off-front wheel with left front wheel motor respectively
The oil inlet of motor is connected, and the oil-out of left front wheel motor and the oil-out of off-front wheel motor are connected with the B mouths of enclosed pump；Institute
The P1 mouths for stating high low speed switching valve are connected with the oil inlet of left back wheel motor and the oil inlet of off hind wheel motor respectively, and high low speed is cut
The P2 mouths for changing valve are connected with the oil-out of left back wheel motor and the oil-out of off hind wheel motor respectively.
Wherein, the enclosed pump includes being connected with the both ends of slippage pump and the plunger pump of flushing valve, slippage pump and flushing valve
It is all connected between the A mouths of plunger pump, B mouths, the input of slippage pump is connected with hydraulic oil container；The high low speed switching valve includes
Two position, three-way electromagnetic change valve, two-position three way pilot operated directional control valve and two-position four-way pilot operated directional control valve.
Moreover, the first port of the two-position four-way pilot operated directional control valve passes through the A mouths of high low speed switching valve and the A of enclosed pump
Mouth is connected, and the second port of two-position four-way pilot operated directional control valve is connected by the B mouths of high low speed switching valve with the B mouths of enclosed pump, and two
3rd port of position four-way pilot operated directional control valve respectively with the second port of two-position three way pilot operated directional control valve and high low speed switching valve
P2 mouths are connected, the 4th port of two-position four-way pilot operated directional control valve respectively with the 3rd port of two-position three way pilot operated directional control valve and height
The P1 mouths of fast switching valve are connected.
Moreover, the first port of the two position, three-way electromagnetic change valve coil-end with two-position three way pilot operated directional control valve respectively
Be connected with the coil-end of two-position four-way pilot operated directional control valve, the second port of two position, three-way electromagnetic change valve respectively with two-position three way liquid
Control the first port of reversal valve, the spring terminal of two-position three way pilot operated directional control valve, the spring terminal and height of two-position four-way pilot operated directional control valve
The oil return opening of low speed switching valve is connected, and the 3rd port of two position, three-way electromagnetic change valve passes through the X mouths of high low speed switching valve and mended
The output end of oil pump is connected.
Compared with prior art, the invention has the advantages that：
By the setting of enclosed pump and high low speed switching valve, wherein high low speed switching valve commutates including two-position three-way electromagnetic
Valve, two-position three way pilot operated directional control valve and two-position four-way pilot operated directional control valve, two logical liquid are controlled using two position, three-way electromagnetic change valve
Control reversal valve commutated, using two-position four-way pilot operated directional control valve come control main pump whether give two after wheel motor fuel feeding, regulation two
The flow that individual preceding wheel motor obtains, so as to control driving wheel speed；Two trailing wheel horses are controlled using two-position three way pilot operated directional control valve
Whether the oil inlet and outlet reached is mutually connected, and so as to control whether wheel motor after two can rotate freely under the dragging of vehicle frame, matches somebody with somebody
Close other reversal valves and realize high low speed handoff functionality.Driven by two and the switching of 4 wheel driven realize that the high low speed of travel speed switches,
Use 4 wheel driven under work pattern of sweeping the floor, speed is slow；Use two front-wheel drives under transition pattern, transition speed is fast；Realize four
The high low speed switching of wheel drive road sweeper, can be switched into row speed governing, speed governing model by engine speed, discharge of main pump and high low speed
Enclose big.And interior outer wheel speeds inconsistent caused tire when under any pattern in the absence of the steering brought due to body frame structure for automotive
Wear phenomenon, it is equally applicable to the road sweeper on monoblock type chassis.
The above is only the general introduction of technical solution of the present invention, in order to be better understood upon the technological means of the present invention, under
With reference to accompanying drawing, the invention will be further described in face.
Brief description of the drawings
Fig. 1 is the structural representation on articulation steering chassis in the prior art；
Fig. 2 is Fig. 1 hydraulic-driven schematic diagram；
Fig. 3 is a kind of structural representation of all-hydraulic-driven road sweeper walking high and low speed switching device of the present invention.
Embodiment
With reference to Figure of description, the present invention is further illustrated.
A kind of all-hydraulic-driven road sweeper walking high and low speed switching device as shown in Figure 3, including be connected with hydraulic oil container
Enclosed pump 1 and the high low speed switching valve 4 that is connected with the A mouths of enclosed pump 1；The A mouths of the enclosed pump 1 respectively with left front wheel motor
2 oil inlet is connected with the oil inlet of off-front wheel motor 3, and the oil-out of left front wheel motor 2 and the oil-out of off-front wheel motor 3 are equal
It is connected with the B mouths of enclosed pump 1；The P1 mouths of the high low speed switching valve 4 oil inlet with left back wheel motor 5 and off hind wheel horse respectively
Oil inlet up to 6 is connected, the P2 mouths of high low speed switching valve 4 respectively with the oil-out of left back wheel motor 5 and going out for off hind wheel motor 6
Hydraulic fluid port is connected.
The enclosed pump 1 includes the plunger pump 1-1 for being connected with slippage pump 1-2 and flushing valve 1-3, slippage pump 1-2 and flushing
Valve 1-3 both ends are all connected between plunger pump 1-1 A mouths, B mouths, and slippage pump 1-2 input is connected with hydraulic oil container；Institute
Stating high low speed switching valve 4 includes two position, three-way electromagnetic change valve 4-1, two-position three way pilot operated directional control valve 4-2 and two-position four-way hydraulic control
Reversal valve 4-3.
The first port of the two-position four-way pilot operated directional control valve 4-3 A mouths and enclosed pump that 1. mouth passes through high low speed switching valve 4
1 A mouths are connected, two-position four-way pilot operated directional control valve 4-3 second port B mouths and enclosed pump 1 that 2. mouth passes through high low speed switching valve 4
B mouths be connected, two-position four-way pilot operated directional control valve 4-3 the 3rd port 3. mouth respectively with two-position three way pilot operated directional control valve 4-2
2. mouth is connected Two-port netwerk with the P2 mouths of high low speed switching valve 4, two-position four-way pilot operated directional control valve 4-3 the 4th port 4. mouth respectively with
3. mouth is connected with the P1 mouths of high low speed switching valve 4 for two-position three way pilot operated directional control valve 4-2 the 3rd port.
The first port of the two position, three-way electromagnetic change valve 4-1 1. mouth respectively with two-position three way pilot operated directional control valve 4-2's
Coil-end is connected with two-position four-way pilot operated directional control valve 4-3 coil-end, two position, three-way electromagnetic change valve 4-1 second port 2. mouth
Respectively with two-position three way pilot operated directional control valve 4-2 first port 1. mouth, two-position three way pilot operated directional control valve 4-2 spring terminal, two
Four-way pilot operated directional control valve 4-3 spring terminal is connected with the oil return opening of high low speed switching valve 4, two position, three-way electromagnetic change valve 4-1's
3. mouth is connected by the X mouths of high low speed switching valve 4 with slippage pump 1-2 output end for 3rd port.
All-hydraulic-driven road sweeper walking high and low speed switching device provided by the invention, can pass through two drives and the switching of 4 wheel driven
The high low speed switching of travel speed is realized, uses 4 wheel driven under work pattern of sweeping the floor, speed is slow；Before two being used under transition pattern
Wheel drive, transition speed are fast.
When the two-position two-way electromagnetic directional valve 4-1 no powers in high low speed switching valve 4, work of the valve in own spring force
Under, the 2. mouth of the valve is connected with 1. mouth, and its 3. mouth closing, now two-position three way pilot operated directional control valve 4-2 and two-position four-way liquid
Control reversal valve 4-3 control terminal by two position, three-way electromagnetic change valve 4-1 1. mouth, 2. mouth is connected with fuel tank, two-position three way liquid
Control reversal valve 4-2 and two-position four-way pilot operated directional control valve 4-3 resets in the presence of own spring force, two-position three way pilot operated directional control valve
4-2 1. mouth, 2. mouth and 3. mouth is mutually closed, two-position four-way pilot operated directional control valve 4-3 1. mouth is connected with 3. mouth, 2. mouth and 4. mouth
It is connected.
When the two position, three-way electromagnetic change valve 4-1 in high low speed switching valve 4 is powered, the 3. mouth of the valve is connected with 1. mouth,
And its 2. mouth is closed, now slippage pump 1-2 control oil is by two position, three-way electromagnetic change valve 4-1 3. mouth, 1. mouth is to two
Threeway pilot operated directional control valve 4-2 and two-position four-way pilot operated directional control valve 4-3 control terminal, and two pilot operated directional control valve commutations are controlled, two
Position threeway pilot operated directional control valve 4-2 1. mouth, 2. mouth and 3. mouth intercommunication, two-position four-way pilot operated directional control valve 4-3 1. mouth, 2. mouth, 3.
Mouth and 4. mouth are mutually closed.
Low-speed mode：
Under low-speed mode, two position, three-way electromagnetic change valve 4-1 no powers, plunger pump 1-1 hydraulic oil is divided into three from A mouths
Road, the entrance of the first via to left front wheel motor, the entrance on the second road to off-front wheel motor, A of the 3rd road to high low speed switching valve 4
Mouthful, preceding two-way is returned directly to plunger pump 1-1 B mouths after wheel motor before two, passed through after the A mouths on the 3rd road to high low speed switching valve
Two-position four-way pilot operated directional control valve 4-3 1. mouth is to the valve 3. mouth, and be connected to the P2 mouths of high low speed switching valve 4, after P2 mouths come out
It is divided into two-way, is coupled with the entrance of wheel motor after two, returns plunger pump 1-1 B mouths after wheel motor after two.It is now
The complete paralleling model of four wheel motors, oil can be distributed freely in each motor inlet, and in the absence of tire rotational speed, simultaneous wheels tire does not wear
Situation.
Fast mode：
Under fast mode, two position, three-way electromagnetic change valve 4-1 is powered, and slippage pump 1-2 control oil is by two-position three way electricity
Magnetic reversal valve 4-1 3. mouth, 1. mouth to two-position three way pilot operated directional control valve 4-2 and two-position four-way pilot operated directional control valve 4-3 control terminal,
And control the commutation of two pilot operated directional control valves.Plunger pump 1-1 hydraulic oil is out followed by two preceding wheel motors, towards trailing wheel from A mouths
The hydraulic circuit of motor is closed by two-position four-way pilot operated directional control valve 4-3, and hydraulic oil only supplies front-wheel, and the speed of wheel motor adds before making
Times.The outlet of wheel motor and entrance are by two-position three way pilot operated directional control valve 4-2 2. mouth, 3. mouth is connected with fuel tank afterwards（Oil tank joint
Be two position, three-way electromagnetic change valve 1. mouth）, now two trailing wheels rotated freely under the dragging of vehicle frame, due to fuel tank phase
Even, wheel motor gateway is not in build the pressure and emptying phenomenon after two.Under fast mode, the oil of two front-wheels is freely distributes, and two
The oil of wheel motor is similarly free distribution afterwards, caused tire wear phenomenon during in the absence of tire rotational speed difference.
The innovative point of the present invention is, can be driven by two and the switching of 4 wheel driven realizes that the high low speed of travel speed switches,
Sweep the floor and 4 wheel driven is used under work pattern, speed is slow；Use two front-wheel drives under transition pattern, transition speed is fast；It is and in office
Tire wear phenomenon caused by interior outer wheel speeds are inconsistent when under what pattern in the absence of the steering brought due to body frame structure for automotive.
The above described is only a preferred embodiment of the present invention, any formal limitation not is made to the present invention, though
So the present invention is disclosed above with preferred embodiment, but is not limited to the present invention, any to be familiar with this professional technology people
Member, without departing from the scope of the present invention, when the technology contents using the disclosure above make a little change or modification
For the equivalent embodiment of equivalent variations, as long as being the content without departing from technical solution of the present invention, the technical spirit according to the present invention
Any simple modification, equivalent change and modification made to above example, still fall within the scope of technical solution of the present invention
It is interior.
Claims (1)
- The high and low speed switching device 1. a kind of all-hydraulic-driven road sweeper is walked, it is characterised in that：Including what is be connected with hydraulic oil container Enclosed pump and the high low speed switching valve being connected with the A mouths of enclosed pump；The A mouths of the enclosed pump are connected with the oil inlet of left front wheel motor and the oil inlet of off-front wheel motor respectively, the near front wheel horse The oil-out and the oil-out of off-front wheel motor reached is connected with the B mouths of enclosed pump；The P1 mouths difference of the high low speed switching valve Be connected with the oil inlet of left back wheel motor and the oil inlet of off hind wheel motor, the P2 mouths of high low speed switching valve respectively with left rear wheel horse The oil-out reached is connected with the oil-out of off hind wheel motor；The enclosed pump includes being connected with slippage pump and the plunger pump of flushing valve, and the both ends of slippage pump and flushing valve are all connected to post Fill between the A mouths of pump, B mouths, the input of slippage pump is connected with hydraulic oil container；The high low speed switching valve includes two-position three way electricity Magnetic reversal valve, two-position three way pilot operated directional control valve and two-position four-way pilot operated directional control valve；The first port of the two-position four-way pilot operated directional control valve is connected by the A mouths of high low speed switching valve with the A mouths of enclosed pump, and two The second port of position four-way pilot operated directional control valve is connected by the B mouths of high low speed switching valve with the B mouths of enclosed pump, two-position four-way hydraulic control 3rd port of reversal valve is connected with the second port of two-position three way pilot operated directional control valve and the P2 mouths of high low speed switching valve respectively, and two 4th port of position four-way pilot operated directional control valve respectively with the 3rd port of two-position three way pilot operated directional control valve and high low speed switching valve P1 mouths are connected；The first port of the two position, three-way electromagnetic change valve respectively with the coil-end of two-position three way pilot operated directional control valve and two four The coil-end of logical pilot operated directional control valve is connected, the second port of two position, three-way electromagnetic change valve respectively with two-position three way pilot operated directional control valve First port, the spring terminal of two-position three way pilot operated directional control valve, the spring terminal of two-position four-way pilot operated directional control valve and high low speed switching The oil return opening of valve is connected, and the 3rd port of two position, three-way electromagnetic change valve is defeated by the X mouths of high low speed switching valve and slippage pump Go out end to be connected.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610286689.8A CN105774540B (en) | 2016-04-29 | 2016-04-29 | A kind of all-hydraulic-driven road sweeper walking high and low speed switching device |
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| CN201610286689.8A CN105774540B (en) | 2016-04-29 | 2016-04-29 | A kind of all-hydraulic-driven road sweeper walking high and low speed switching device |
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| CN105774540B true CN105774540B (en) | 2017-11-28 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837903B (en) * | 2016-12-14 | 2019-01-25 | 合加新能源汽车有限公司 | A kind of small four-wheel hydraulic-driven Multifunction outdoor Operation Van walking closed type hydraulic system |
| CN106678097A (en) * | 2017-02-23 | 2017-05-17 | 洛阳理工学院 | Walking driving system used for hydraulic four-wheel drive agricultural machine |
| CN106870500B (en) * | 2017-03-24 | 2018-09-18 | 广西柳工机械股份有限公司 | The front-wheel drive control valve and front wheel driven hydraulic system of land leveller |
| CN109733190B (en) * | 2019-01-18 | 2024-06-14 | 徐州徐工环境技术有限公司 | Vehicle running control system and method |
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| JP2000186348A (en) * | 1998-12-21 | 2000-07-04 | Komatsu Ltd | Hydraulic controller for working vehicle |
| US6176084B1 (en) * | 1999-01-29 | 2001-01-23 | Textron Inc. | Hydraulic system for propelling a vehicle |
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| CN105774540A (en) | 2016-07-20 |
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