CN103953594B - A kind of running gear system and road wheel fluid power system thereof - Google Patents
A kind of running gear system and road wheel fluid power system thereof Download PDFInfo
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- CN103953594B CN103953594B CN201410192330.5A CN201410192330A CN103953594B CN 103953594 B CN103953594 B CN 103953594B CN 201410192330 A CN201410192330 A CN 201410192330A CN 103953594 B CN103953594 B CN 103953594B
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Abstract
The present invention provides a kind of running gear system and road wheel fluid power system thereof, road wheel fluid power system includes that at least two is for the driver element driving road wheel to rotate, each driver element all includes variable displacement motor and height, low pressure oil way, the sequence valve for carrying out switch motion according to the oil pressure size at variable displacement motor oil-in it is equipped with on the high-pressure oil passage of each driver element, the control port of sequence valve connects with the oil-in of described variable displacement motor, the throttling oil circuit which is provided with choke valve it is communicated with on high-pressure oil passage, throttling oil circuit is arranged in parallel with described sequence valve, the corresponding upstream and downstream being positioned at sequence valve of two connectivity parts that throttling oil circuit is docked and connected with high-pressure oil passage.When skidding occurs in road wheel, sequence valve cuts out, and working connection disconnects, and only has and flows to corresponding variable displacement motor through throttling oil circuit a little, substantial amounts of high pressure liquid force feed is provided to other driver element to drive other road wheel normal rotation, it is ensured that the normal work of whole road wheel fluid power system.
Description
Technical field
The present invention relates to a kind of running gear system and road wheel fluid power system thereof.
Background technology
Walking machine is many is driven walking by running gear system, running gear system includes road wheel and for the road wheel fluid power system driving road wheel to rotate, road wheel fluid power system includes hydraulic power supply and each driver element connected with hydraulic power supply, and each driver element includes the variable displacement motor as executive component and the high and low pressure oil circuit into and out of the corresponding connection of hydraulic fluid port with variable displacement motor.
Walking machine, when normally travelling, can be divided into straight line moving and curved path walking according to run trace, and when mechanical paths walking of walking such as is turned, the differential function that each road wheel should possess is easy to the most each traction drive motor and realizes.But, violent road surface is changed for having severe road conditions or wheel load, use simple in parallel exist following dangerous: as long as one road wheel of any of which due to the real-time wheel load that distributed not or attachment condition bad (such as running into ice and snow, the road conditions such as muddy) and when occurring trackslipping, hydraulic system just can only maintain the low-pressure required for the motor of the road wheel driving this moment of torsion to meet minimum, the moment of torsion of other motors determined by this pressure is the least, it is not enough to drive walking machine to walk on, thus affects the properly functioning of walking machine.
At present, for from the point of view of the road wheel that driven by hydraulic system, the problem of the walking machine stagnation caused when solving wheel slip frequently with in the following manner: a, the road wheel that installing speed probe is excessive to identify slippage rate on each road wheel, then regulate the discharge capacity of the corresponding motor of this road wheel by closed-loop control system；B, by all or part of each road wheel of connecting drive motor oil circuit by the way of force their run-in synchronism.But both modes all adds additional the cost of whole hydraulic system and the difficulty of control system.
Summary of the invention
The present invention provides a kind of simple and effective road wheel fluid power system, the technical problem stagnated to solve walking machine of the prior art easily to occur when certain road wheel skids；Meanwhile, the present invention also provides for a kind of running gear system using above-mentioned road wheel fluid power system.
The technical scheme of road wheel fluid power system provided by the present invention is: road wheel fluid power system, the driver element rotated for driving corresponding line travelling wheel including at least two, each driver element all include having into, the variable displacement motor of oil-out and with the entering of variable displacement motor, the height of oil-out correspondence connection respectively, low pressure oil way, the sequence valve for carrying out switch motion according to the oil pressure size at variable displacement motor oil-in it is equipped with on the high-pressure oil passage of described each driver element, the control port of sequence valve connects with the oil-in of described variable displacement motor, the throttling oil circuit which is provided with choke valve it is communicated with on high-pressure oil passage, throttling oil circuit is arranged in parallel with described sequence valve, the corresponding upstream and downstream being positioned at sequence valve of two connectivity parts that throttling oil circuit is docked and connected with high-pressure oil passage
Described sequence valve is that internal control leaks formula sequence valve.
The variable displacement motor of described each driver element is the double-action variable displacement motor that can drive corresponding crop rotation Double-directional rotary of walking, double-action variable displacement motor has two hydraulic fluid ports alternately as described oil-in and oil-out, described each driver element all include that two hydraulic fluid ports with double-action variable displacement motor respectively are docked and connected alternately as described high-pressure oil passage and two oil circuits of low pressure oil way, described sequence valve and the described throttling oil circuit being arranged in parallel with sequence valve it is equipped with on two oil circuits, the low pressure conducting oil circuit for the conducting when corresponding oil circuit is as low pressure oil way also it is respectively communicated with on two oil circuits, low pressure conducting oil circuit is provided with the control valve for controlling low pressure conducting oil circuit break-make, low pressure conducting oil circuit and described throttling oil circuit, sequence valve is arranged in parallel, the corresponding upstream and downstream being positioned at sequence valve of two connectivity parts that low pressure conducting oil circuit is docked and connected with high-pressure oil passage.
Described control valve is check valve.
nullThe technical scheme of the running gear system of use provided by the present invention above-mentioned road wheel fluid power system is: running gear system，The fluid power system rotated including at least two road wheel and driving road wheel，Fluid power system includes the driver element that at least two rotates for driving corresponding line travelling wheel，Each driver element all include having into、The variable displacement motor of oil-out and respectively with the entering of variable displacement motor、The height of oil-out correspondence connection、Low oil circuit，The sequence valve for carrying out switch motion according to the oil pressure size at variable displacement motor oil-in it is equipped with on the high-pressure oil passage of described each driver element，The control port of sequence valve connects with the oil-in of described variable displacement motor，The throttling oil circuit which is provided with choke valve it is communicated with on high-pressure oil passage，Throttling oil circuit is arranged in parallel with described sequence valve，The corresponding upstream and downstream being positioned at sequence valve of two connectivity parts that throttling oil circuit is docked and connected with high-pressure oil passage.
Described sequence valve is that internal control leaks formula sequence valve.
The variable displacement motor of described each driver element is the double-action variable displacement motor that can drive corresponding crop rotation Double-directional rotary of walking, double-action variable displacement motor has two hydraulic fluid ports alternately as described oil-in and oil-out, described each driver element all include that two hydraulic fluid ports with double-action variable displacement motor respectively are docked and connected alternately as described high-pressure oil passage and two oil circuits of low pressure oil way, described sequence valve and the described throttling oil circuit being arranged in parallel with sequence valve it is equipped with on two oil circuits, the low pressure conducting oil circuit for the conducting when corresponding oil circuit is as low pressure oil way also it is respectively communicated with on two oil circuits, low pressure conducting oil circuit is provided with the control valve for controlling low pressure conducting oil circuit break-make, low pressure conducting oil circuit and described throttling oil circuit, sequence valve is arranged in parallel, the corresponding upstream and downstream being positioned at sequence valve of two connectivity parts that low pressure conducting oil circuit is docked and connected with high-pressure oil passage.
Described control valve is check valve.
The invention has the beneficial effects as follows: road wheel fluid power system provided by the present invention is when driving road wheel to rotate, hydraulic power supply provides high pressure liquid force feed to each driver element, a little high pressure liquid force feed flows to the oil-in of relevant variable motor through the throttling oil circuit of each driver element, if the road wheel that each driver element is driven is the most non-slip, the load of the variable displacement motor of each driver element is bigger, high pressure is formed at the oil-in of variable displacement motor, sequence valve is controlled to be opened, high-pressure oil passage turns on, hydraulic oil rapidly flows toward variable displacement motor through high-pressure oil passage, and flow out through low pressure oil way, and then drive variable displacement motor quickly to rotate, realize the driven to road wheel.And when skidding occurs in the road wheel that certain driver element is driven, owing to the load of the variable displacement motor of respective drive unit diminishes, the inlet pressure of variable displacement motor reduces, low pressure is formed at the oil-in of variable displacement motor, the controlled closedown of sequence valve, high-pressure oil passage disconnects at sequence valve, the high pressure liquid force feed that hydraulic power supply is provided only has and flows to corresponding variable displacement motor through throttling oil circuit a little, substantial amounts of high pressure liquid force feed is provided to other driver elements to drive other road wheel normal rotation, ensure the normal work of whole road wheel fluid power system, ensure the normal mobile of running gear system.Whole fluid power system overall structure is simple, uses efficient and convenient, and whole system cost is relatively low.And; owing to there being a little high pressure liquid force feed warp knuckle stream valve to flow to corresponding variable displacement motor always; variable displacement motor does not haves petrol starvation; ensure the normal rotation that the road wheel of skidding occurs; after avoiding skidding to terminate, the rotating speed of this road wheel does not catches up with the rotating speed of other road wheels and causes abrasion to road wheel; appearance " hollow " phenomenon can also be prevented effectively from pipeline, preferably protect pipeline.
Further, sequence valve uses internal control to leak formula sequence valve, is so easy to ensure the stability of hydraulic circuit in whole fluid power system.
Further, the variable displacement motor of each driver element is double-action variable displacement motor, so can meet the Double-directional rotary of road wheel to control moving forward and backward of walking machine, accordingly, two oil circuits in each driver element are also required to work to meet the normal of double-action variable displacement motor alternately as high-pressure oil passage and low pressure oil way.
Further, low pressure conducting oil circuit uses check valve as control valve, simple in construction, controls reliable.
Accompanying drawing explanation
Fig. 1 is that the hydraulic schematic diagram of a kind of embodiment of running gear system provided by the present invention (only show the structure of the single driver element of corresponding single row travelling wheel in running gear system in figure, eliminate hydraulic power supply and other road wheels and the driver element of correspondence, other road wheel and driver element road wheel to that indicated in the drawings and driver element is identical).
Detailed description of the invention
As shown in Figure 1, a kind of embodiment of running gear system, running gear system in this embodiment includes multiple road wheel 1 and for the fluid power system 10 driving road wheel 1 to rotate, only show single row travelling wheel in FIG, shown in its Fig. 1 of other road wheels, road wheel is identical, fluid power system 10 includes hydraulic power supply and multiple driver element for driving corresponding line travelling wheel to rotate, hydraulic power supply generally uses by engine-driven hydraulic pump of the walking machine using running gear system, the structure of each driver element is identical, as a example by driver element shown in Fig. 1, driver element all include having into, the variable displacement motor of oil-out connects entering of variable displacement motor with correspondence, oil-out and the high-pressure oil passage P of hydraulic power supply (not shown), low pressure oil way S.
Variable displacement motor in the present embodiment is the double-action variable displacement motor 3 that can drive corresponding crop rotation Double-directional rotary of walking, and double-action variable displacement motor 3 has two hydraulic fluid ports alternately as described oil-in and oil-out.Each driver element all includes two oil circuits alternately as high-pressure oil passage P and low pressure oil way S that two hydraulic fluid ports with bidirectional variable hydraulic motor 3 are docked and connected respectively, and the structure of two oil circuits is essentially identical.Two oil circuits of each driver element include the working connection 100 as high-pressure oil passage and low pressure oil way, working connection 100 is provided with the sequence valve 5 for carrying out switch motion according to the oil pressure size at variable displacement motor oil-in, the control port 51 of sequence valve 5 connects with the oil-in of the double-action variable displacement motor 3 of respective drive unit, sequence valve 5 leaks formula sequence valve for internal control, and the drain tap on two sequence valves 5 on each driver element connects with oil return circuit T respectively.Being communicated with throttling oil circuit 300 on working connection 100, throttling oil circuit 300 is arranged in parallel with sequence valve 5, and throttle oil circuit 300 upstream and downstream that be positioned at sequence valve 5 corresponding with two connectivity parts that working connection 100 is docked and connected.
The low pressure conducting oil circuit 200 for the conducting when corresponding oil circuit is as low pressure oil way also it is respectively communicated with on two working connections 100 of each driver element, low pressure conducting oil circuit 200 is provided with the control valve for controlling low pressure conducting oil circuit break-make, control valve is check valve 6, low pressure conducting oil circuit 200 is arranged in parallel with described throttling oil circuit 300, sequence valve 5, low pressure conducting oil circuit 200 upstream and downstream that be positioned at sequence valve 5 corresponding with two connectivity parts that working connection 100 is docked and connected.
nullDuring the road wheel fluid power system work that the present embodiment is provided，The double-action variable displacement motor 3 of each driver element is in transmission connection with corresponding road wheel 1 by decelerator 2，Hydraulic power supply provides high pressure liquid force feed to each driver element，A little high pressure liquid force feed flows to the oil-in of corresponding double-action variable displacement motor 3 through the throttling oil circuit 300 of each driver element，If the road wheel 1 that each driver element is driven is the most non-slip，The load of the double-action variable displacement motor 3 of each driver element is bigger，High pressure is formed at the oil-in of double-action variable displacement motor 3，Sequence valve 5 is opened，Working connection 100 turns on，Hydraulic oil rapidly flows toward double-action variable displacement motor 3 through working connection 100，And flow out through low pressure oil way S，And then drive double-action variable displacement motor 3 quickly to rotate，Double-action variable displacement motor 3 drives road wheel 1 to rotate by decelerator 2，Thus drive whole walking machine normally to walk.
And when skidding occurs in the road wheel 1 that certain driver element is driven, owing to the load of the double-action variable displacement motor 3 of respective drive unit diminishes, the inlet pressure of double-action variable displacement motor 3 reduces, low pressure is formed at the oil-in of double-action variable displacement motor 3, sequence valve 5 cuts out, working connection 100 disconnects, the high pressure liquid force feed that hydraulic power supply is provided only has and flows to corresponding double-action variable displacement motor 3 through throttling oil circuit 200 a little, substantial amounts of high pressure liquid force feed is provided to other driver element to drive other road wheel normal rotation, ensure the normal work of whole road wheel fluid power system, ensure the normal mobile of walking machine.
In the present embodiment, high pressure liquid force feed flows through choke valve, at choke valve into and out of forming pressure differential between oilhole, it is ensured that whole system pressure stability.
The high pressure formed at the hydraulic fluid port of two-way hydraulic motor in the present embodiment and low pressure are can drive sequence valve to be opened for standard, when the pressure of the hydraulic fluid port of double-action variable displacement motor increases to sequence valve can be driven to open through the control port of sequence valve, think that the pressure of hydraulic fluid port of double-action variable displacement motor is high pressure, and when the hydraulic fluid port pressure drop of double-action variable displacement motor as little as can not drive sequence valve to open through the control port of sequence valve, it is believed that the pressure of the hydraulic fluid port of double-action variable displacement motor is low pressure.
Fluid power system in the present embodiment i.e. can be applicable to can also apply in enclosed drive system in open type drive system.
In above-described embodiment, the driver element in road wheel fluid power system can be arranged according to actual needs, and driver element can arrange two or more according to the number of road wheel.
In above-described embodiment, variable displacement motor is double-action variable displacement motor, and in other embodiments, variable displacement motor can also be unidirectional variable displacement motor, and now, high-pressure oil passage and low pressure oil way need not exchange, it is only necessary to arrange sequence valve, throttling oil circuit on high-pressure oil passage.
The walking running gear that above-described embodiment is provided can be applied in the running gear based on hydraulic-driven such as engineering machinery, handling machinery, agriculture and forestry machinery, special vehicle.
The present invention also provides for the embodiment of a kind of road wheel fluid power system, and the structure of the road wheel fluid power system in this embodiment is identical with the structure of the fluid power system in above-mentioned running gear system, does not repeats them here.
Claims (8)
- null1. road wheel fluid power system，The driver element rotated for driving corresponding line travelling wheel including at least two，Each driver element all include having into、The variable displacement motor of oil-out and with the entering of variable displacement motor、The height of oil-out correspondence connection respectively、Low pressure oil way，It is characterized in that: on the high-pressure oil passage of described each driver element, be equipped with the sequence valve for carrying out switch motion according to the oil pressure size at variable displacement motor oil-in，The control port of sequence valve connects with the oil-in of described variable displacement motor，When the oil-in of variable displacement motor forms high pressure，Sequence valve is controlled to be opened，When the oil-in of variable displacement motor forms low pressure，The controlled closedown of sequence valve，The throttling oil circuit which is provided with choke valve it is communicated with on high-pressure oil passage，Throttling oil circuit is arranged in parallel with described sequence valve，The corresponding upstream and downstream being positioned at sequence valve of two connectivity parts that throttling oil circuit is docked and connected with high-pressure oil passage.
- Road wheel fluid power system the most according to claim 1, it is characterised in that: described sequence valve is that internal control leaks formula sequence valve.
- nullRoad wheel fluid power system the most according to claim 1 and 2，It is characterized in that: the variable displacement motor of described each driver element is the double-action variable displacement motor that can drive corresponding crop rotation Double-directional rotary of walking，Double-action variable displacement motor has two hydraulic fluid ports alternately as described oil-in and oil-out，Described each driver element all include that two hydraulic fluid ports with double-action variable displacement motor respectively are docked and connected alternately as described high-pressure oil passage and two oil circuits of low pressure oil way，Described sequence valve and the described throttling oil circuit being arranged in parallel with sequence valve it is equipped with on two oil circuits，The low pressure conducting oil circuit for the conducting when corresponding oil circuit is as low pressure oil way also it is respectively communicated with on two oil circuits，Low pressure conducting oil circuit is provided with the control valve for controlling low pressure conducting oil circuit break-make，Low pressure conducting oil circuit and described throttling oil circuit、Sequence valve is arranged in parallel，The corresponding upstream and downstream being positioned at sequence valve of two connectivity parts that low pressure conducting oil circuit is docked and connected with high-pressure oil passage.
- Road wheel fluid power system the most according to claim 3, it is characterised in that: described control valve is check valve.
- null5. running gear system，The fluid power system rotated including at least two road wheel and driving road wheel，Fluid power system includes the driver element that at least two rotates for driving corresponding line travelling wheel，Each driver element all include having into、The variable displacement motor of oil-out and respectively with the entering of variable displacement motor、The height of oil-out correspondence connection、Low oil circuit，It is characterized in that: on the high-pressure oil passage of described each driver element, be equipped with the sequence valve for carrying out switch motion according to the oil pressure size at variable displacement motor oil-in，The control port of sequence valve connects with the oil-in of described variable displacement motor，When the oil-in of variable displacement motor forms high pressure，Sequence valve is controlled to be opened，When the oil-in of variable displacement motor forms low pressure，The controlled closedown of sequence valve，The throttling oil circuit which is provided with choke valve it is communicated with on high-pressure oil passage，Throttling oil circuit is arranged in parallel with described sequence valve，The corresponding upstream and downstream being positioned at sequence valve of two connectivity parts that throttling oil circuit is docked and connected with high-pressure oil passage.
- Running gear system the most according to claim 5, it is characterised in that: described sequence valve is that internal control leaks formula sequence valve.
- null7. according to the running gear system described in claim 5 or 6，It is characterized in that: the variable displacement motor of described each driver element is the double-action variable displacement motor that can drive corresponding crop rotation Double-directional rotary of walking，Double-action variable displacement motor has two hydraulic fluid ports alternately as described oil-in and oil-out，Described each driver element all include that two hydraulic fluid ports with double-action variable displacement motor respectively are docked and connected alternately as described high-pressure oil passage and two oil circuits of low pressure oil way，Described sequence valve and the described throttling oil circuit being arranged in parallel with sequence valve it is equipped with on two oil circuits，The low pressure conducting oil circuit for the conducting when corresponding oil circuit is as low pressure oil way also it is respectively communicated with on two oil circuits，Low pressure conducting oil circuit is provided with the control valve for controlling low pressure conducting oil circuit break-make，Low pressure conducting oil circuit and described throttling oil circuit、Sequence valve is arranged in parallel，The corresponding upstream and downstream being positioned at sequence valve of two connectivity parts that low pressure conducting oil circuit is docked and connected with high-pressure oil passage.
- Running gear system the most according to claim 7, it is characterised in that: described control valve is check valve.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410192330.5A CN103953594B (en) | 2014-05-08 | 2014-05-08 | A kind of running gear system and road wheel fluid power system thereof |
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| CN201410192330.5A CN103953594B (en) | 2014-05-08 | 2014-05-08 | A kind of running gear system and road wheel fluid power system thereof |
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| CN103953594B true CN103953594B (en) | 2016-08-24 |
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| CN109467013A (en) * | 2018-12-29 | 2019-03-15 | 航天重型工程装备有限公司 | A kind of snatch vehicle |
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|---|---|---|---|---|
| CN101480921A (en) * | 2008-01-09 | 2009-07-15 | 三一重工股份有限公司 | Hydraulic power transmission engineering vehicle antiskid method, system as well as leveler |
| CN201461601U (en) * | 2009-08-24 | 2010-05-12 | 长安大学 | Electrical control hydraulic unidirectional constant speed device |
| CN201792744U (en) * | 2010-08-31 | 2011-04-13 | 三一重工股份有限公司 | Single-pump dual-motor driving engineering vehicle and hydraulic system and control device thereof |
| CN203835831U (en) * | 2014-05-08 | 2014-09-17 | 纽科伦（新乡）起重机有限公司 | Wheel type walking device and walking wheel hydraulic driving system thereof |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1451474B1 (en) * | 2001-11-28 | 2006-04-19 | Bosch Rexroth AG | Drive |
| JP5562131B2 (en) * | 2010-06-14 | 2014-07-30 | Ｉｈｉ建機株式会社 | Hydraulic circuit for vehicle travel |
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- 2014-05-08 CN CN201410192330.5A patent/CN103953594B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101480921A (en) * | 2008-01-09 | 2009-07-15 | 三一重工股份有限公司 | Hydraulic power transmission engineering vehicle antiskid method, system as well as leveler |
| CN201461601U (en) * | 2009-08-24 | 2010-05-12 | 长安大学 | Electrical control hydraulic unidirectional constant speed device |
| CN201792744U (en) * | 2010-08-31 | 2011-04-13 | 三一重工股份有限公司 | Single-pump dual-motor driving engineering vehicle and hydraulic system and control device thereof |
| CN203835831U (en) * | 2014-05-08 | 2014-09-17 | 纽科伦（新乡）起重机有限公司 | Wheel type walking device and walking wheel hydraulic driving system thereof |
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