CN202879244U - Closed type hydraulic system for controlling running of vehicle, as well as vehicle - Google Patents
Closed type hydraulic system for controlling running of vehicle, as well as vehicle Download PDFInfo
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- CN202879244U CN202879244U CN 201220616284 CN201220616284U CN202879244U CN 202879244 U CN202879244 U CN 202879244U CN 201220616284 CN201220616284 CN 201220616284 CN 201220616284 U CN201220616284 U CN 201220616284U CN 202879244 U CN202879244 U CN 202879244U
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- speed
- controller
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Abstract
The utility model discloses a closed type hydraulic system for controlling running of a vehicle; the closed type hydraulic system comprises a hydraulic motor for driving the vehicle to run and a bidirectional variable pump communicated with the hydraulic motor, wherein the closed type hydraulic system comprises a controller and a speed detection device which are electrically connected with each other; the speed detection device is used for detecting the running speed actual value of the vehicle and feeds the running speed actual value back to the controller; the controller is internally provided with a running speed threshold value and can compare the running speed actual value with the running speed threshold value; when the running speed actual value is different from the running speed threshold value, the controller controls the output flow of the bidirectional variable pump so as to enable the running speed actual value to be equal to the running speed threshold value. The utility model further provides a vehicle which controls the running by using the closed type hydraulic system provided by the utility model. With the adoption of the closed type hydraulic system, a hydraulic motor drives and controls the running of the vehicle with a constant vehicle speed, and thus the ideal vehicle speed is achieved and the vehicle speed is kept constant.
Description
Technical field
The utility model relates to the fluid control field of controlling vehicle to run, particularly, relates to a kind of vehicle of controlling the closed fhdraulic system of vehicle to run and using this closed fhdraulic system.
Background technology
Along with the development of various special-use vehicles, use the mode of hydraulic way control vehicle to run more and more general such as large engineering vehicle, feature vehicle etc., it has controls the advantages such as convenient and swift.In the prior art, the vehicle of hydraulic moving class all is to come the control variable pump to drive the HM Hydraulic Motor walking by foot-operated plate valve.Thereby namely drive vehicle to run by fluid motor-driven wheel hub transmission shaft.Wherein, need staff's foot-operated plate valve that tramps with one's feet in driving procedure to change the variable capacity of pump, namely delivery rate is controlled the speed of travel of vehicle.Yet traditional design plan is not all considered the internal leakage of Hydraulic Elements own, hydraulic oil pump Volumetric efficiency etc., so can not in time make compensation to the delivery rate of pump, therefore can't obtain a speed of a motor vehicle that want and stable.
The utility model content
A purpose of the present utility model provides a kind of closed fhdraulic system of controlling vehicle to run, and this closed fhdraulic system can be according to the delivery rate of timely make-up pump, thereby reaches the desirable speed of a motor vehicle and keep that it is constant.
Another purpose of the present utility model provides a kind of vehicle, the closed fhdraulic system of the control vehicle to run that this vehicle use the utility model provides.
To achieve these goals, the utility model provides a kind of closed fhdraulic system of controlling vehicle to run, comprise be used to the HM Hydraulic Motor that drives described vehicle to run and the two way variable displacement pump that is communicated with this HM Hydraulic Motor, wherein, described closed fhdraulic system comprises controller and the speed detector of mutual electrical connection, described speed detector is for detection of the speed of travel actual value of described vehicle and feed back to described controller, be provided with speed of travel threshold value in the described controller, and described speed of travel actual value and described speed of travel threshold value can be compared, when speed of travel actual value and described speed of travel threshold value are different, the delivery rate that described controller is controlled described two way variable displacement pump changes, so that described speed of travel actual value equals described speed of travel threshold value.
Preferably, described closed fhdraulic system comprises the apportioning valve that is electrically connected with described controller, described two way variable displacement pump comprises the displacement control assembly of controlling delivery rate, described apportioning valve is connected between described displacement control assembly and the pressure oil-source, changes the delivery rate of described two way variable displacement pump to control described displacement control assembly.
Preferably, described apportioning valve is proportional pressure-reducing valve or proportional pressure control valve.
Preferably, described displacement control assembly comprises the plunger case of the swash plate that drives described two way variable displacement pump, also be connected with electromagnetic switching valve between described apportioning valve and the described plunger case, this solenoid directional control valve is electrically connected with described controller, to control the switching of this electromagnetic switching valve by described controller, so that the pressure oil of regulating through described apportioning valve can selectively drive described plunger case at the described swash plate of both direction driving.
Preferably, described closed fhdraulic system comprises the feed circuit of the both sides that are connected to described HM Hydraulic Motor, and described pressure oil-source is this feed circuit, and described apportioning valve is communicated with this feed circuit.
Preferably, described feed circuit comprises by pass valve, and the oil inlet of this by pass valve accesses described feed circuit, and oil outlet is communicated with fuel tank.
Preferably, described feed circuit comprises the first one-way overflow valve, the second one-way overflow valve and slippage pump, described the first one-way overflow valve and the second one-way overflow valve are communicated with the both sides of described HM Hydraulic Motor respectively, and the oil outlet of described slippage pump accesses between described the first one-way overflow valve and the second one-way overflow valve by access point.
Preferably, described feed circuit comprises oil filter, after the oil outlet of described this oil filter of described apportioning valve access.
Preferably, described speed detector is the speed sensor of the rotating speed of the wheel hub transmission shaft of the described vehicle of detection.
According on the other hand of the present utility model, a kind of vehicle is provided, described vehicle comprises the closed fhdraulic system of the control vehicle to run that the utility model provides.
Pass through technique scheme, because the controller in the utility model can compare speed of travel actual value and the predefined speed of travel threshold value when vehicle in front, when the two occurs not simultaneously, then can in time be controlled by controller the delivery rate of two way variable displacement pump, the i.e. timely delivery rate of make-up pump, thereby so that HM Hydraulic Motor is driven the control vehicle to run with the constant speed of a motor vehicle, to reach the desirable speed of a motor vehicle and to keep that it is constant.
Other feature and advantage of the present utility model will partly be described in detail in the specific embodiment subsequently.
Description of drawings
Accompanying drawing is to be used to provide further understanding of the present utility model, and consists of the part of specification sheets, is used from explanation the utility model with the following specific embodiment one, but does not consist of restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the closed fhdraulic system that provides of the utility model preferred implementation.
Description of reference numerals
1 HM Hydraulic Motor, 2 two way variable displacement pumps
3 controllers, 4 speed detectors
5 apportioning valves, 6 electromagnetic switching valves
7 feed circuits, 8 wheel hub transmission shafts
21 displacement control assemblies, 22 plunger cases
71 first one-way overflow valves, 72 second one-way overflow valves
73 slippage pumps, 74 by pass valves
75 oil filters, 76 pressure relayes
The a access point
The specific embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present utility model is elaborated.Should be understood that, the specific embodiment described herein only is used for description and interpretation the utility model, is not limited to the utility model.
As shown in Figure 1, the utility model provides a kind of closed fhdraulic system of controlling vehicle to run, this closed fhdraulic system comprises for the HM Hydraulic Motor 1 that drives vehicle to run, this HM Hydraulic Motor 1 can be rotated by the wheel hub axle drive shaft 8 that drives vehicle and be driven vehicle to run, and comprise the two way variable displacement pump 2 that is communicated with this HM Hydraulic Motor 1, think that HM Hydraulic Motor 1 provides working oil, can control vehicle to run by this closed hydraulic loop.Wherein, in order in time to replenish the fluid of this closed hydraulic loop, feed circuit 7 is set therein also usually, in time closed hydraulic loop is carried out the operations such as repairing by this feed circuit 7.
In order to realize the purpose of this utility model, namely can realize so that vehicle is walked with the desirable speed of a motor vehicle, the closed fhdraulic system that the utility model provides comprises controller 3 and the speed detector 4 of mutual electrical connection, wherein, speed detector is for detection of the speed of travel actual value of vehicle and feed back to controller 3, such as adopting the modes such as speed sensor that detect wheel hub transmission shaft 8 rotating speeds to detect the speed of travel of vehicle.Be provided with speed of travel threshold value in the controller 3, this speed of travel threshold value can be the single value of the desirable speed of a motor vehicle of representative, also can be the value range that can represent the desirable speed of a motor vehicle.At this moment, speed of travel actual value and this speed of travel threshold value of the vehicle that controller 3 can detect speed detector 4 compare, when speed of travel actual value and speed of travel threshold value are different, be that vehicles failed is when reaching the desirable speed of a motor vehicle or can not keep this ideal speed of a motor vehicle, the delivery rate of controller 3 control two way variable displacement pumps 2 changes, so that speed of travel actual value equals speed of travel threshold value.Namely can be so that vehicle reaches and keep the desirable speed of a motor vehicle to walk.
Need to prove, the embodiment that can realize technique scheme has multiple, control the mode of two way variable displacement pumps 3 delivery rates etc. such as controller 3, for convenience of description, in this introduction preferred implementation wherein, this preferred implementation only is used for explanation the utility model, is not limited to the utility model.
In preferred implementation as shown in Figure 1, in order to realize that the delivery rate of two way variable displacement pump 2 is accurately controlled, preferably, the closed fhdraulic system that the utility model provides comprises the apportioning valve 5 that is electrically connected with controller 3, two way variable displacement pump 2 then comprises the displacement control assembly 21 of controlling delivery rate, apportioning valve 5 is connected between displacement control assembly 21 and the pressure oil-source, changes the delivery rate of two way variable displacement pump 2 with control displacement control assembly 21.Namely can the passing ratio valve without the polar region, the pressure of the pressure oil that provides of control presssure oil sources realizes controlling the displacement control action of displacement control assembly 21 continuously, thereby can realize exactly the control to two way variable displacement pump 2 delivery rates.Except above-mentioned usage ratio valve carries out the proportional control; in other NM embodiments; can also adopt based on the servovalve of Hydraulic servo technology pressure oil is accurately controlled; thereby realize the accurate control of bidirectional variable 2 delivery rates, all should drop in the protection domain of the present utility model for this type of change or replacement.
Wherein in preferred implementation of the present utility model, apportioning valve 5 is the directional control valves such as proportional pressure-reducing valve or proportional pressure control valve, in real work, proportion electro-magnet output control current signal by controller 3 Comparative Examples valves 5, this control current signal size is corresponding with the oil pressure of the pressure oil of apportioning valve 5 outputs, apportioning valve 5 can have according to this size ground output of controlling electric current the pressure oil of different pressures, thereby realize pari passu the accurately displacement control assembly 21 of control by this pressure oil, with the accurate control of the delivery rate of realizing two way variable displacement pump 2.Except this pressure-gradient control valve,, as long as can be so that realize the mode of accurate control of the delivery rate of two way variable displacement pump 2 by control presssure oil and all should drop in the protection domain of the present utility model.
Wherein, in the utility model, wherein as a kind of preferred embodiment, the displacement control assembly of the two way variable displacement pump 2 that the utility model provides comprises the plunger case 22 of the swash plate that can drive two way variable displacement pump 2, drive swash plate with different directions and selectively realize size adjustment to delivery rate by this plunger case 22, at this moment, can between apportioning valve 5 and plunger case 22, be connected with electromagnetic switching valve 6, this electromagnetic switching valve 6 is electrically connected with controller 3 (for the clear main contents that show, the connection line that does not show electromagnetic switching valve 6 and controller 3 among Fig. 1), switching by controller 3 these electromagnetic switching valves 6 of control, the pressure oil of regulating through apportioning valve 5 selectively drive post plug cylinder 22 drives swash plate at both direction, thereby can selectively realize the size adjustment of the delivery rate of two way variable displacement pump 2.
Particularly as shown in Figure 1, electromagnetic switching valve 6 can be and is preferably Y type Median Function three position four-way directional control valve, the oil inlet of this three position four-way directional control valve is communicated with apportioning valve 5, return opening is communicated with fuel tank, and plunger case 22 is preferably the two-way column plug cylinder, namely comprises the first rod chamber and second rod chamber of opposite setting, wherein, the first actuator port of three position four-way directional control valve is communicated with the first rod chamber of plunger case 22, and the second actuator port is communicated with the second rod chamber of plunger case 22.Thereby carry out current signal by the different electromagnet of 3 pairs of these three position four-way directional control valves of controller and export to carry out the spool position switching, realization selectively supplies to the pressure oil of apportioning valve 5 outputs in first rod chamber or the second rod chamber of plunger case 22, thereby realize the motion of plunger case 22 on both direction, control with the delivery rate direction to two way variable displacement pump 2 selectively, namely can realize HM Hydraulic Motor is rotated the control (HM Hydraulic Motor can conter clockwise and clickwise) of direction.Wherein, in real work, controller 3 can be according to the magnitude relationship of speed of travel actual value and speed of travel threshold value, and drives the three position four-way directional control valve switching position, thereby exactly speed of travel actual value is maintained on the speed of travel threshold value.Above-mentioned this electromagnetic switching valve 6 can be the three position four-way directional control valve of other Median Functions, also can be the change-over valve of other kinds, and the various changes that can expect for these type of those skilled in the art all should drop in the protection domain of the present utility model.
In preferred implementation of the present utility model, above-mentioned pressure oil-source is preferably the feed circuit 7 in the closed hydraulic loop, just the oil inlet of apportioning valve 5 is communicated with this feed circuit 7 and gets final product, thereby does not need to arrange separately Hydraulic Pump equipressure oil sources so that structure is more simple, rationally.Wherein, this feed circuit 7 is connected to the both sides of HM Hydraulic Motor 1 take timely as the additional fluid of hydraulic circuit.Wherein preferably, feed circuit 7 comprises by pass valve 74, the oil inlet access feed circuit of this by pass valve 74, and oil outlet is communicated with fuel tank.Namely limit the pressure of feed circuits 7 by this by pass valve 74, wherein, the pressure that apportioning valve 5 is exported is accordingly less than the pressure of the feed circuit 7 that is limited by this by pass valve 74.
Particularly, feed circuit 7 comprises the first one-way overflow valve 71, the second one-way overflow valve 72 and slippage pump 73, the first one-way overflow valve 71 and the second one-way overflow valve 72 are communicated with the both sides of HM Hydraulic Motor 1 respectively, and the oil outlet of slippage pump 73 accesses between the first balance cock 71 and the second balance cock 72 by access point a.The wherein identical and opposite installation of structure of the first one-way overflow valve 71 and the second one-way overflow valve 72, wherein, one-way overflow valve comprises check valve parallel with one another and by pass valve, check valve in two one-way overflow valves all allows the fluid of slippage pump to flow to hydraulic circuit, the fluid of supplying with from slippage pump 73 can be by a low pressure side that flows to HM Hydraulic Motor these two check valves, thereby realizes the repairing to hydraulic circuit.Owing to also having with check valve in two one-way overflow valves and being parallel with by pass valve, therefore, the pressure of two by pass valves can be set according to actual condition, when the lateral pressure in the hydraulic circuit increase and greater than one-way overflow valve in during the setting pressure of by pass valve, can open this by pass valve and fluid is entered in the feed circuit, thereby realize the safety of closed hydraulic loop.In addition; in order to guarantee the oil circuit cleaning in the feed circuit; preferably; feed circuit 7 comprises oil filter 75 and the pressure relay 76 in parallel with this oil filter 75; this pressure relay 76 can open and close oil filter 75 automatically by the pressure of feed circuit 7; can either realize the fluid cleaning to feed circuit, can also protect oil filter not damaged by high pressure oil.In addition, for to the cleaning of the pressure oil of the control of displacement control assembly 21, preferably, after the oil outlet of apportioning valve 5 these oil filters 75 of access.
To sum up, the closed hydraulic loop of the control vehicle to run that the utility model provides can be according to the comparable situation of current vehicle to run speed and desirable vehicle to run threshold speed, control timely and accurately the delivery rate of two way variable displacement pump, so that current vehicle to run speed reaches and keeps all on the desirable speed of a motor vehicle, thereby so that the utility model provides the speed of a motor vehicle control of vehicle more to optimize, have higher practicality and promotional value.
Below describe by reference to the accompanying drawings preferred implementation of the present utility model in detail; but; the utility model is not limited to the detail in the above-mentioned embodiment; in technical conceive scope of the present utility model; can carry out multiple simple variant to the technical solution of the utility model, these simple variant all belong to protection domain of the present utility model.
Need to prove in addition, each concrete technical characterictic described in the above-mentioned specific embodiment in reconcilable situation, can make up by any suitable mode, for fear of unnecessary repetition, the utility model is to the no longer separately explanation of various possible array modes.
In addition, also can carry out combination in any between the various embodiment of the present utility model, as long as it is without prejudice to thought of the present utility model, it should be considered as content disclosed in the utility model equally.
Claims (10)
1. closed fhdraulic system of controlling vehicle to run, comprise be used to the HM Hydraulic Motor that drives described vehicle to run (1) and the two way variable displacement pump (2) that is communicated with this HM Hydraulic Motor (1), it is characterized in that, described closed fhdraulic system comprises controller (3) and the speed detector (4) of mutual electrical connection, described speed detector is for detection of the speed of travel actual value of described vehicle and feed back to described controller (3), described controller is provided with speed of travel threshold value in (3), and described speed of travel actual value and described speed of travel threshold value can be compared, when speed of travel actual value and described speed of travel threshold value are different, the delivery rate that described controller (3) is controlled described two way variable displacement pump (2) changes, so that described speed of travel actual value equals described speed of travel threshold value.
2. closed fhdraulic system according to claim 1, it is characterized in that, described closed fhdraulic system comprises the apportioning valve (5) that is electrically connected with described controller (3), described two way variable displacement pump (2) comprises the displacement control assembly (21) of controlling delivery rate, described apportioning valve (5) is connected between described displacement control assembly (21) and the pressure oil-source, changes the delivery rate of described two way variable displacement pump (2) to control described displacement control assembly (21).
3. closed fhdraulic system according to claim 2 is characterized in that, described apportioning valve (5) is proportional pressure-reducing valve or proportional pressure control valve.
4. according to claim 2 or 3 described closed fhdraulic systems, it is characterized in that, described displacement control assembly (21) comprises the plunger case (22) of the swash plate that drives described two way variable displacement pump (2), also be connected with electromagnetic switching valve (6) between described apportioning valve (5) and the described plunger case (22), this solenoid directional control valve (6) is electrically connected with described controller (3), to control the switching of this electromagnetic switching valve (6) by described controller (3), so that the pressure oil of regulating through described apportioning valve (5) can selectively drive described plunger case (22) at the described swash plate of both direction driving.
5. according to claim 2 or 3 described closed fhdraulic systems, it is characterized in that, described closed fhdraulic system comprises the feed circuit (7) of the both sides that are connected to described HM Hydraulic Motor (1), described pressure oil-source is this feed circuit (7), and described apportioning valve (5) is communicated with this feed circuit (7).
6. closed fhdraulic system according to claim 5 is characterized in that, described feed circuit (7) comprises by pass valve (74), and the oil inlet of this by pass valve (74) accesses described feed circuit, and oil outlet is communicated with fuel tank.
7. closed fhdraulic system according to claim 6, it is characterized in that, described feed circuit (7) comprises the first one-way overflow valve (71), the second one-way overflow valve (72) and slippage pump (73), described the first one-way overflow valve (71) and the second one-way overflow valve (72) are communicated with the both sides of described HM Hydraulic Motor (1) respectively, and the oil outlet of described slippage pump (73) is by between access point (a) access described the first one-way overflow valve (71) and the second one-way overflow valve (72).
8. closed fhdraulic system according to claim 7 is characterized in that, described feed circuit (7) comprises oil filter (75), after the oil outlet of described apportioning valve (5) described this oil filter of access (75).
9. closed fhdraulic system according to claim 1 is characterized in that, described speed detector (4) is the speed sensor of the rotating speed of the wheel hub transmission shaft (8) of the described vehicle of detection.
10. a vehicle is characterized in that, described vehicle comprises the closed fhdraulic system of the described control vehicle to run of any one among the claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220616284 CN202879244U (en) | 2012-11-20 | 2012-11-20 | Closed type hydraulic system for controlling running of vehicle, as well as vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220616284 CN202879244U (en) | 2012-11-20 | 2012-11-20 | Closed type hydraulic system for controlling running of vehicle, as well as vehicle |
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| Publication Number | Publication Date |
|---|---|
| CN202879244U true CN202879244U (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220616284 Expired - Lifetime CN202879244U (en) | 2012-11-20 | 2012-11-20 | Closed type hydraulic system for controlling running of vehicle, as well as vehicle |
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| CN (1) | CN202879244U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195763A (en) * | 2013-04-18 | 2013-07-10 | 中联重科股份有限公司 | Hydraulic drive system, dual-drive system comprising same and engineering machinery |
| CN105416050A (en) * | 2015-11-28 | 2016-03-23 | 贵州航天特种车有限责任公司 | Chassis hydraulic drive system |
| CN108953256A (en) * | 2018-08-01 | 2018-12-07 | 广西柳工机械股份有限公司 | loading machine hydrostatic drive system |
| CN112042621A (en) * | 2020-08-31 | 2020-12-08 | 石河子大学 | Hydraulic drive walking sprayer |
-
2012
- 2012-11-20 CN CN 201220616284 patent/CN202879244U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103195763A (en) * | 2013-04-18 | 2013-07-10 | 中联重科股份有限公司 | Hydraulic drive system, dual-drive system comprising same and engineering machinery |
| CN103195763B (en) * | 2013-04-18 | 2016-08-10 | 中联重科股份有限公司 | Hydraulic drive system, dual-drive system comprising same and engineering machinery |
| CN105416050A (en) * | 2015-11-28 | 2016-03-23 | 贵州航天特种车有限责任公司 | Chassis hydraulic drive system |
| CN105416050B (en) * | 2015-11-28 | 2018-07-24 | 贵州航天特种车有限责任公司 | A kind of chassis fluid power system |
| CN108953256A (en) * | 2018-08-01 | 2018-12-07 | 广西柳工机械股份有限公司 | loading machine hydrostatic drive system |
| CN112042621A (en) * | 2020-08-31 | 2020-12-08 | 石河子大学 | Hydraulic drive walking sprayer |
| CN112042621B (en) * | 2020-08-31 | 2022-07-08 | 石河子大学 | Hydraulic drive walking sprayer |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 410000 Hunan province Changsha hi tech Development Zone, Lin Yulu No. 288 Patentee after: ZOOMLION ENVIRONMENTAL INDUSTRY Co.,Ltd. Address before: 410013 Changsha province high tech Development Zone, No. 307 South Road, silver basin Patentee before: Changsha Zoomlion Environmental Industry Co.,Ltd. |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130417 |