CN203428833U - Engineering vehicle and winch hydraulic system thereof - Google Patents
Engineering vehicle and winch hydraulic system thereof Download PDFInfo
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- CN203428833U CN203428833U CN201320515900.0U CN201320515900U CN203428833U CN 203428833 U CN203428833 U CN 203428833U CN 201320515900 U CN201320515900 U CN 201320515900U CN 203428833 U CN203428833 U CN 203428833U
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- pressure
- capstan winch
- valve
- hydraulic efficiency
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Abstract
The utility model discloses a winch hydraulic system. The winch hydraulic system comprises a motor and a control valve, wherein the motor is used for a winch allowing a rope to come out from the front end as well as at the rear end, the control valve is used for controlling the motor to be communicated with a pressure oil circuit and an oil return circuit and adjusting steering of the motor, the pressure of hydraulic oil flowing into the control valve from the pressure oil circuit can be switched between first working pressure and second working pressure which correspond to the working condition that the rope comes out from the front end of the winch and the working condition that the rope comes out from the rear end of the winch respectively, and the first working pressure is larger than the second working pressure. When the rope comes out from the front end of the winch, the pressure oil circuit is under the second working pressure. When the rope comes out from the rear end of the winch, the pressure oil circuit is under the first working pressure. The control valve can control the motor to turn in the forward direction or in the reverse direction under both working conditions. According to the winch hydraulic system, two stages of pressure are available, the low pressure is suitable for the working condition that the rope comes out from the front end of the winch, and a front rope outlet mechanism can be protected; the high pressure is suitable for the working condition that the rope comes out from the rear end of the winch, and a rear rope outlet mechanism can work normally under proper pressure. The utility mode further discloses an engineering vehicle provided with the winch hydraulic system.
Description
Technical field
The utility model relates to hydraulic technique field, particularly relates to a kind of engineering truck and capstan winch hydraulic efficiency pressure system thereof.
Background technology
Remove obstacles or breakdown lorry has former and later two hydraulic windlasss conventionally, due to structure and space constraint, some vehicle need to be merged into one by two capstan winches, a capstan winch realize before and after two kinds of operating modes of rope stretching.
Please refer to Fig. 1, Fig. 1 is a kind of principle schematic of typical capstan winch hydraulic efficiency pressure system.
At present, conventionally by control cock, directly control Winch motor 5', by rotating and reverse of Winch motor 5', realized the rope closing of capstan winch and put rope, in two kinds of operating modes of front and back rope stretching, capstan winch all has rope closing and puts two kinds of mode of operations of rope.As shown in Figure 1, capstan winch hydraulic efficiency pressure system comprises hydraulic reservoir 1', Hydraulic Pump 2', control cock 3', balance cock 4' and Winch motor 5'.In capstan winch when work,, Hydraulic Pump 2' to Winch motor 5' fuel feeding, rotates capstan winch by control cock 3' and balance cock 4', and control cock 3' changes turning to of Winch motor 5' by changing fuel feeding direction.
During capstan winch hydraulic work system, hydraulic oil enters control cock 3' after being flowed out by Hydraulic Pump 2' pressure port, then through balance cock 4', enters Winch motor 5'.During the right working position work of control cock 3', hydraulic oil flows into Winch motor 5' from left side, and flow out on right side, and Winch motor 5' is rotated in the forward, capstan winch forward; During the left working position work of control cock 3', hydraulic oil flows into Winch motor 5' from right side, and flow out in left side, Winch motor 5' contrarotation, capstan winch reversion.
The pressure that before and after capstan winch, two kinds of operating modes of rope stretching need is different, and front rope stretching pressure is less, and rear rope stretching pressure is larger.When pressure setting is higher, be applicable to rear rope stretching operating mode, before now using, rope stretching operating mode is easy to damage front rope stretching mechanism; When pressure setting is lower, be applicable to front rope stretching operating mode, now after rope stretching mechanism cisco unity malfunction.
Therefore, how designing a kind of capstan winch hydraulic efficiency pressure system, make its rear rope stretching operating mode that had not only been applicable to the front rope stretching operating mode of capstan winch but also had been applicable to capstan winch, is that those skilled in the art are badly in need of the technical matters solving at present.
Utility model content
The purpose of this utility model is to provide a kind of capstan winch hydraulic efficiency pressure system, and this capstan winch hydraulic efficiency pressure system had not only been applicable to the front rope stretching operating mode of capstan winch but also had been applicable to the rear rope stretching operating mode of capstan winch.Another object of the present utility model is to provide a kind of engineering truck with this capstan winch hydraulic efficiency pressure system.
In order to realize above-mentioned technical purpose, the utility model provides a kind of capstan winch hydraulic efficiency pressure system, comprises for the motor of front and back rope stretching capstan winch and controls the control cock that described motor is communicated with pressure oil circuit and oil return circuit, and described control cock regulates turning to of described motor; The pressure that flows into the hydraulic oil of described control cock from described pressure oil circuit can switch between the first operation pressure and the second operation pressure, rear rope stretching operating mode and the front rope stretching operating mode of the corresponding described capstan winch of difference, wherein, described the first operation pressure is greater than described the second operation pressure.
Preferably, described control cock is four-way change-over valve; Described the first operation pressure and described the second operation pressure are formed by two overflow branch roads that are connected in parallel between described pressure oil circuit and described oil return circuit respectively.
Preferably, in two described overflow branch roads, high pressurized overflow branch road comprises the first by pass valve, and low pressurized overflow branch road comprises the second by pass valve and the shutoff valve of series connection.
Preferably, in described low pressurized overflow branch road, shutoff valve described in the upstream bit serial of described the second by pass valve.
Preferably, two described overflow branch roads are all positioned at the position, upstream of described four-way change-over valve.
Preferably, described four-way change-over valve, described the first by pass valve, described the second by pass valve and described shutoff valve are integrated in same valve body.
Preferably, also comprise selector valve, described selector valve has at least two working positions, and one of them working position can be communicated with described pressure oil circuit and Hydraulic Pump, and all the other working positions can be communicated with described Hydraulic Pump and other hydraulic efficiency pressure systems.
Preferably, described selector valve is that ball valve is selected in threeway, and described threeway selects ball valve also to comprise middle transition working position, and described middle transition working position can be communicated with on Shi San road.
The utility model also provides a kind of engineering truck, comprises capstan winch and capstan winch hydraulic efficiency pressure system, and described capstan winch hydraulic efficiency pressure system is the capstan winch hydraulic efficiency pressure system described in above-mentioned any one.
Preferably, described engineering truck is vehicle or the breakdown lorry of removing obstacles.
The capstan winch hydraulic efficiency pressure system that the utility model provides, comprises for the motor of front and back rope stretching capstan winch and controls the control cock that motor is communicated with pressure oil circuit and oil return circuit, the turning to of control cock governor motor; Pressure from the hydraulic oil of pressure oil circuit inflow control valve can switch between the first operation pressure and the second operation pressure, rear rope stretching operating mode and the front rope stretching operating mode of corresponding capstan winch respectively, and wherein, the first operation pressure is greater than the second operation pressure.
The pressure that before and after capstan winch, two kinds of operating modes of rope stretching need is different, and during front rope stretching, pressure is less, and during rear rope stretching, pressure is larger.During capstan winch work, by capstan winch hydraulic efficiency pressure system, provide power, pressure from the hydraulic oil of pressure oil circuit inflow control valve can switch between the first operation pressure and the second operation pressure, the first operation pressure is greater than the second operation pressure, during the front rope stretching operating mode of capstan winch, pressure oil circuit is in the second operation pressure, and control cock can be controlled motor forward or reverse; After capstan winch, during rope stretching operating mode, pressure oil circuit is in the first operation pressure, and control cock also can be controlled motor forward or reverse.
This capstan winch hydraulic efficiency pressure system has two stage pressure handoff functionalities, can be applicable to two kinds of operating modes of capstan winch, and the second operation pressure is applicable to front rope stretching operating mode, can protect the front rope stretching mechanism can be because hypertonia is damaged; The first operation pressure is applicable to rear rope stretching operating mode ，Shi Hou rope stretching mechanism and can under applicable pressure, works.
Concrete, control cock is four-way change-over valve; The first operation pressure and the second operation pressure are formed by two overflow branch roads that are connected in parallel between pressure oil circuit and oil return circuit respectively.Four-way change-over valve comprises two working positions, can be respectively motor forward fuel feeding and reverse fuel feeding; Two overflow branch roads are respectively low pressurized overflow branch road and high pressurized overflow branch road, two kinds of operating modes of front and back rope stretching of the corresponding capstan winch of difference during the two work.
In a kind of preferred mode, in two overflow branch roads, high pressurized overflow branch road comprises the first by pass valve, and low pressurized overflow branch road comprises the second by pass valve and the shutoff valve of series connection.Further, in low pressurized overflow branch road, the upstream bit serial shutoff valve of the second by pass valve.
Concrete, two overflow branch roads are all positioned at the position, upstream of four-way change-over valve.
Further, four-way change-over valve, the first by pass valve, the second by pass valve and shutoff valve are integrated in same valve body.
In another kind of mode, capstan winch hydraulic efficiency pressure system also comprises selector valve, and selector valve has at least two working positions, and one of them working position can be communicated with pressure oil circuit and Hydraulic Pump, and all the other working positions can be communicated with Hydraulic Pump and other hydraulic efficiency pressure systems.
During capstan winch work, selector valve is communicated with the pressure oil circuit of Hydraulic Pump and motor; When capstan winch is not worked, selector valve is communicated with the oil feed line of Hydraulic Pump and other hydraulic efficiency pressure systems.This capstan winch hydraulic efficiency pressure system can share Hydraulic Pump and hydraulic reservoir with other hydraulic efficiency pressure systems, in use procedure, by selector valve, switches, and saves dynamical element.
Concrete, selector valve is that ball valve is selected in threeway, threeway selects ball valve also to comprise middle transition working position, and middle transition working position can be communicated with on Shi San road, can prevent that when threeway selects ball valve to mediate excessive working position entrance from being blocked and the phenomenon that occurs exploding pump.
The utility model also provides a kind of engineering truck, comprises capstan winch and capstan winch hydraulic efficiency pressure system, and described capstan winch hydraulic efficiency pressure system is above-mentioned capstan winch hydraulic efficiency pressure system.The capstan winch hydraulic efficiency pressure system of this project vehicle has the function that two stage pressures switch, and can be applicable to two kinds of operating modes of capstan winch front and back rope stretching, and meanwhile, this capstan winch hydraulic efficiency pressure system can also share Hydraulic Pump with other hydraulic efficiency pressure systems.
Accompanying drawing explanation
Fig. 1 is a kind of principle schematic of typical capstan winch hydraulic efficiency pressure system;
Fig. 2 is the principle schematic of capstan winch hydraulic efficiency pressure system provided by the utility model;
Fig. 3 is the structural representation that ball valve is selected in the threeway of the capstan winch hydraulic efficiency pressure system shown in Fig. 2.
Wherein, the Reference numeral in Fig. 1 and the corresponding relation between parts are as follows:
Hydraulic reservoir 1'; Hydraulic Pump 2'; Control cock 3'; Balance cock 4'; Winch motor 5';
Reference numeral and the corresponding relation between parts in Fig. 2 and Fig. 3 are as follows:
Hydraulic reservoir 1; Hydraulic Pump 2; Control cock 3; Change-over valve 31; The first by pass valve 32; The second by pass valve 33; Shutoff valve 34; Balance cock 4; Motor 5; Selector valve 6; Entrance 61.
The specific embodiment
Core of the present utility model is to provide a kind of capstan winch hydraulic efficiency pressure system, and this capstan winch hydraulic efficiency pressure system had not only been applicable to the front rope stretching operating mode of capstan winch but also had been applicable to the rear rope stretching operating mode of capstan winch.Another core of the present utility model is to provide a kind of engineering truck with this capstan winch hydraulic efficiency pressure system.
In order to make those skilled in the art person understand better the utility model scheme, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Please refer to Fig. 2, Fig. 2 is the principle schematic of capstan winch hydraulic efficiency pressure system provided by the utility model.
In a kind of concrete embodiment, the utility model provides a kind of capstan winch hydraulic efficiency pressure system, comprises for the motor 5 of front and back rope stretching capstan winch and controls the control cock 3 that motor 5 is communicated with pressure oil circuit and oil return circuit, the turning to of control cock 3 governor motors 5; Pressure from the hydraulic oil of pressure oil circuit inflow control valve 3 can switch between the first operation pressure and the second operation pressure, rear rope stretching operating mode and the front rope stretching operating mode of corresponding capstan winch respectively, and wherein, the first operation pressure is greater than the second operation pressure.
Control cock 3 is controlled turning to of motor 5, by rotating and reverse of motor 5, is realized the rope closing of capstan winch and is put rope, and before and after capstan winch, in two kinds of operating modes of rope stretching, capstan winch all has rope closing and puts two kinds of mode of operations of rope.Conventionally, before motor 5, also balance cock 4 can be installed, in capstan winch when work,, pressure oil circuit to motor 5 fuel feeding, rotates capstan winch by control cock 3 and balance cock 4, and control cock 3 changes turning to of motor 5 by changing the fuel feeding direction of motor 5.
The pressure that before and after capstan winch, two kinds of operating modes of rope stretching need is different, and during front rope stretching, pressure is less, and during rear rope stretching, pressure is larger.Capstan winch work provides power by capstan winch hydraulic efficiency pressure system, pressure from the hydraulic oil of pressure oil circuit inflow control valve 3 can switch between the first operation pressure and the second operation pressure, the first operation pressure is greater than the second operation pressure, during the front rope stretching operating mode of capstan winch, pressure oil circuit is in the second operation pressure, and control cock 3 can be controlled motor 5 forwards or upset; After capstan winch, during rope stretching operating mode, pressure oil circuit is in the first operation pressure, and control cock 3 also can be controlled motor 5 forward or reverse.
This capstan winch hydraulic efficiency pressure system can be carried out two stage pressure switchings, two kinds of operating modes of rope stretching before and after can taking into account.The second operation pressure is applicable to front rope stretching operating mode, can protect front rope stretching mechanism, makes it can be because hypertonia is damaged; The first operation pressure is applicable to rear rope stretching operating mode ，Shi Hou rope stretching mechanism and can under applicable pressure, works.Compared with prior art, this capstan winch hydraulic efficiency pressure system can make the operation that two kinds of operating modes of capstan winch all can be safe and reliable.
Concrete, control cock 3 is four-way change-over valve 31; The first operation pressure and the second operation pressure are formed by two overflow branch roads that are connected in parallel between pressure oil circuit and oil return circuit respectively.
Four-way change-over valve 31 comprises two working positions, can be respectively motor 5 forward fuel feeding and reverse fuel feeding; Two overflow branch roads are respectively low pressurized overflow branch road and high pressurized overflow branch road, two kinds of operating modes of front and back rope stretching of the corresponding capstan winch of difference during the two work.Two working positions of four-way change-over valve 31, as shown in Figure 2, four-way change-over valve 31 when right working position, motor 5 forward fuel feeding; Four-way change-over valve 31 when left working position, the reverse fuel feeding of motor 5.
Concrete, four-way change-over valve 31 can be three position four-way directional control valve, can be also other four-way change-over valve.
During the work of low pressurized overflow branch road, the pressure in pressure oil circuit is the second operation pressure, and now, capstan winch, in front rope stretching operating mode, can change turning to of motor 5 by switching the working position of four-way change-over valve 31, makes capstan winch in rope closing or puts the state of rope.
During high pressurized overflow branch road work, cut off low overflow branch road, the pressure in pressure oil circuit is the first operation pressure, now, capstan winch is in rear rope stretching operating mode, also can change turning to of motor 5 by switching the working position of four-way change-over valve 31, makes capstan winch in rope closing or puts the state of rope.
A kind of preferred embodiment in, in two described overflow branch roads, high pressurized overflow branch road comprises the first by pass valve 32, low pressurized overflow branch road comprises the second by pass valve 33 and the shutoff valve 34 of series connection.
The first by pass valve 32 is set higher pressure, is applicable to rear rope stretching operating mode; The second by pass valve 33 is set lower pressure, is applicable to front rope stretching operating mode.During low pressurized overflow branch road overflow, pressure oil circuit keeps low pressure, equals the oil pressure relief of the second by pass valve 33, i.e. the second operation pressure.During high pressurized overflow branch road work, cut off low overflow branch road, the pressure of pressure oil circuit is higher than the oil pressure relief of the first by pass valve 32.
Further in embodiment, in low pressurized overflow branch road, shutoff valve 34 described in the upstream bit serial of the second by pass valve 33.
Capstan winch is when rear rope stretching operating mode, and shutoff valve 34 is normally closed, can protect the second by pass valve 33.Capstan winch is when front rope stretching operating mode; shutoff valve 34 is opened; now; because the setting pressure of the second by pass valve 33 is less than the setting pressure of the first by pass valve 32; the first by pass valve 32 conductively-closeds, the second by pass valve 33 plays overflow and pressure protect effect, and the maximum pressure of whole capstan winch hydraulic efficiency pressure system is subject to the second by pass valve 33 restrictions; pressure oil circuit plays a very good protection in low pressure ，Dui Qian rope stretching mechanism.
In another kind of concrete embodiment, two described overflow branch roads are all positioned at the position, upstream of described four-way change-over valve 31.In capstan winch hydraulic efficiency pressure system, first by overflow branch road, controlled the pressure of whole system, then by the working position of four-way change-over valve 31, control turning to of motor 5.
Preferably, four-way change-over valve 31, the first by pass valve 32, the second by pass valve 33 and shutoff valve 34 are integrated in same valve body, have reduced the quantity of valve body in capstan winch hydraulic efficiency pressure system, are convenient to install.
In the respective embodiments described above, capstan winch hydraulic efficiency pressure system also comprises selector valve 6, and selector valve 6 has at least two working positions, and one of them working position can be communicated with pressure oil circuit and Hydraulic Pump 2, and all the other working positions can be communicated with Hydraulic Pump 2 and other hydraulic efficiency pressure systems.
This capstan winch hydraulic efficiency pressure system can share Hydraulic Pump 2 and hydraulic reservoir 1 with other hydraulic efficiency pressure systems, by selector valve 6, switches, and saves dynamical element.During capstan winch work, by selector valve 6, be communicated with the pressure oil circuit of Hydraulic Pump 2 and motor 5; When capstan winch is not worked, by selector valve 6, be communicated with the oil feed line of Hydraulic Pump 2 and other hydraulic efficiency pressure systems.
Concrete, selector valve 6 can be selected ball valve for threeway, and threeway selects ball valve also to comprise middle transition working position, and middle transition working position can be communicated with on Shi San road.
Please refer to Fig. 3, Fig. 3 is the structural representation that ball valve is selected in the threeway of the capstan winch hydraulic efficiency pressure system shown in Fig. 2.
The direct connecting tee of Hydraulic Pump 2 outlet is selected ball valve, and this valve can carry high pressure, has three working positions.When capstan winch need to be worked, handle to be broken to right working position, 2 pairs of capstan systems of Hydraulic Pump carry out fuel feeding; When capstan system is not worked, handle can be broken to left working position, Hydraulic Pump 2 is other hydraulic efficiency pressure system fuel feeding; In order to guarantee the safety of Hydraulic Pump 2, threeway selects the excessive working position in centre of ball valve to be communicated with on Shi San road, prevents that threeway from selecting ball valve entrance 61 when excessive position to be blocked and occurring the phenomenon of fried pump.
Except above-mentioned capstan winch hydraulic efficiency pressure system, the utility model also provides a kind of engineering truck that comprises above-mentioned capstan winch hydraulic efficiency pressure system, and the structure of other each several parts of this project vehicle please refer to prior art, repeats no more herein.
Concrete, above-mentioned engineering truck can be wrecker or breakdown lorry, and the capstan winch hydraulic efficiency pressure system of this project vehicle has the function that two stage pressures switch, and can be applicable to two kinds of operating modes of rope stretching before and after capstan winch, meanwhile, this capstan winch hydraulic efficiency pressure system can also share Hydraulic Pump with other hydraulic efficiency pressure systems.
Above engineering truck provided by the utility model and capstan winch hydraulic efficiency pressure system thereof are described in detail.Applied specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; do not departing under the prerequisite of the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1. a capstan winch hydraulic efficiency pressure system, comprises for the motor (5) of front and back rope stretching capstan winch and controls the control cock (3) that described motor (5) is communicated with pressure oil circuit and oil return circuit, described control cock (3) regulates turning to of described motor (5); It is characterized in that, the pressure that flows into the hydraulic oil of described control cock (3) from described pressure oil circuit can switch between the first operation pressure and the second operation pressure, rear rope stretching operating mode and the front rope stretching operating mode of the corresponding described capstan winch of difference, wherein, described the first operation pressure is greater than described the second operation pressure.
2. capstan winch hydraulic efficiency pressure system as claimed in claim 1, is characterized in that, described control cock (3) is four-way change-over valve (31); Described the first operation pressure and described the second operation pressure are formed by two overflow branch roads that are connected in parallel between described pressure oil circuit and described oil return circuit respectively.
3. capstan winch hydraulic efficiency pressure system as claimed in claim 2, is characterized in that, in two described overflow branch roads, high pressurized overflow branch road comprises the first by pass valve (32), and low pressurized overflow branch road comprises the second by pass valve (33) and the shutoff valve (34) of series connection.
4. capstan winch hydraulic efficiency pressure system as claimed in claim 3, is characterized in that, in described low pressurized overflow branch road, and shutoff valve (34) described in the upstream bit serial of described the second by pass valve (33).
5. capstan winch hydraulic efficiency pressure system as claimed in claim 4, is characterized in that, two described overflow branch roads are all positioned at the position, upstream of described four-way change-over valve (31).
6. capstan winch hydraulic efficiency pressure system as claimed in claim 5, is characterized in that, described four-way change-over valve (31), described the first by pass valve (32), described the second by pass valve (33) and described shutoff valve (34) are integrated in same valve body.
7. the capstan winch hydraulic efficiency pressure system as described in claim 1 to 6 any one, it is characterized in that, also comprise selector valve (6), described selector valve (6) has at least two working positions, one of them working position can be communicated with described pressure oil circuit and Hydraulic Pump (2), and all the other working positions can be communicated with described Hydraulic Pump (2) and other hydraulic efficiency pressure systems.
8. capstan winch hydraulic efficiency pressure system as claimed in claim 7, is characterized in that, described selector valve (6) is selected ball valve for threeway, and described threeway selects ball valve also to comprise middle transition working position, and described middle transition working position can be communicated with on Shi San road.
9. an engineering truck, comprises capstan winch and capstan winch hydraulic efficiency pressure system, it is characterized in that, described capstan winch hydraulic efficiency pressure system is the capstan winch hydraulic efficiency pressure system described in claim 1 to 8 any one.
10. engineering truck as claimed in claim 9, is characterized in that, described engineering truck is vehicle or the breakdown lorry of removing obstacles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320515900.0U CN203428833U (en) | 2013-08-22 | 2013-08-22 | Engineering vehicle and winch hydraulic system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320515900.0U CN203428833U (en) | 2013-08-22 | 2013-08-22 | Engineering vehicle and winch hydraulic system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203428833U true CN203428833U (en) | 2014-02-12 |
Family
ID=50057884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320515900.0U Expired - Fee Related CN203428833U (en) | 2013-08-22 | 2013-08-22 | Engineering vehicle and winch hydraulic system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203428833U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105460820A (en) * | 2016-01-21 | 2016-04-06 | 徐工集团工程机械股份有限公司 | Cable-winding electrohydraulic control device and electric traction engineering vehicle |
-
2013
- 2013-08-22 CN CN201320515900.0U patent/CN203428833U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105460820A (en) * | 2016-01-21 | 2016-04-06 | 徐工集团工程机械股份有限公司 | Cable-winding electrohydraulic control device and electric traction engineering vehicle |
| CN105460820B (en) * | 2016-01-21 | 2018-05-01 | 徐工集团工程机械股份有限公司 | Cable rolling electrofluidic control device and electric propulsion engineering truck |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140212 Termination date: 20200822 |