CN214196805U - Hydraulic control system for HD1D motor used for power head motor - Google Patents
Hydraulic control system for HD1D motor used for power head motor Download PDFInfo
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- CN214196805U CN214196805U CN202023291652.5U CN202023291652U CN214196805U CN 214196805 U CN214196805 U CN 214196805U CN 202023291652 U CN202023291652 U CN 202023291652U CN 214196805 U CN214196805 U CN 214196805U
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Abstract
The utility model discloses a hydraulic control system for a power head motor of an HD1D motor, which comprises an oil tank, at least three groups of power head motors, an electromagnetic directional valve, a pilot oil pump, a main directional valve and a variable speed controller, wherein the oil tank is connected with an oil circuit of the main directional valve, the main directional valve is connected with the oil circuit of the at least three groups of power head motors, the power head motors and the electromagnetic directional valve are arranged in pairs, the electromagnetic directional valve arranged in pairs is connected with the oil circuit of the power head motors, the electromagnetic directional valve is connected with the oil circuit of the oil tank through the pilot oil pump, the electromagnetic directional valve is also electrically connected with the variable speed controller, different output pins are arranged on the variable speed controller, different output pins output different electric signals, different electromagnetic directional valves are electrically connected with different output pins, the adjustment of different gears is realized by combining the power head motor of HD1D with the electromagnetic directional valve, and hardware support is provided for multi-gear control, the rock-entering capacity of the drilling machine is improved.
Description
Technical Field
The utility model belongs to the technical field of the rotatory rig control of digging, concretely relates to HD1D motor is used for hydraulic control system of unit head motor.
Background
The drilling process of the rotary drilling rig is realized, the main pump is driven by the rotation of an engine to output high-pressure hydraulic oil, the hydraulic oil is transmitted to a power head motor through a hydraulic control reversing valve, the power head motor is rotated by hydraulic energy and outputs the rotating speed of the power head after passing through a speed reducer and a power head gear box, and finally the rotating speed of the power head is transmitted to a drill rod, so that the drilling of the rotary drilling rig is realized.
At present, as rotary drilling rigs are continuously and widely used under different construction working conditions and construction methods, the requirements on construction load are different, the power head of the conventional rotary drilling rig mainly has a two-gear drilling mode of low-speed large torque for entering rock and quick drilling of soft soil, the torque limitation of the power head of the two-gear drilling mode cannot meet the drilling requirements of the current multi-geological working conditions, and the construction needs more gears for control.
Therefore, developing a rotary drilling rig with more gear controls to realize drilling operation meeting more geological conditions becomes a technical problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a HD1D motor is used for hydraulic control system of unit head motor.
The specific scheme is as follows:
the utility model provides a HD1D motor is used for hydraulic control system of unit head motor, includes the oil tank, still includes three at least unit head motors of group, electromagnetic directional valve, guide's oil pump, main way switching-over valve and variable speed controller, wherein, the oil tank is connected with main way switching-over valve oil circuit, main way switching-over valve is connected with three at least unit head motor oil circuits of group, the unit head motor with the electromagnetic directional valve sets up in pairs, and the electromagnetic directional valve that sets up in pairs is connected with unit head motor oil circuit, the electromagnetic directional valve passes through guide's oil pump and is connected with the oil tank oil circuit, the electromagnetic directional valve is still connected with the variable speed controller electricity, be provided with different output pin on the variable speed controller, the different signal of telecommunication of output pin output of difference, different electromagnetic directional valve are connected with different output pin electricity.
Each electromagnetic directional valve is provided with an electric control end, a first oil guide port, a second oil guide port and a third oil guide port, the electric control end on each electromagnetic directional valve is electrically connected with the variable speed controller, the first oil guide port on each electromagnetic directional valve is connected with the pilot oil pump oil way, the second oil guide port on each electromagnetic directional valve is connected with different power head motor oil ways, and the third oil guide port on each electromagnetic directional valve is connected with the oil tank oil way.
The oil return port on each power head motor is connected with an oil tank oil way, the speed change control oil ports on different power head motors are respectively connected with second oil guide port oil ways on different electromagnetic directional valves, and each power head motor is connected with the main directional valve oil way through the first oil port and the second oil port.
The main circuit directional control valve is provided with a first reversing oil port, a second reversing oil port, a first control oil port, a second control oil port, a third control oil port and a fourth control oil port, wherein the first reversing oil port and the second reversing oil port are connected with different pilot oil pump oil paths, the first control oil port is respectively connected with first oil port oil paths on different power head motors, the second control oil port is respectively connected with second oil port oil paths on different power head motors, and the third control oil port and the fourth control oil port are connected with an oil tank oil path.
The main circuit reversing valve is also provided with a main pump and a one-way valve, and the third control oil port is connected with an oil circuit of the oil tank through the one-way valve and the main pump.
The hydraulic motor, the hydraulic control valve and the variable cylinder are arranged in the power head motor, the hydraulic motor oil way is connected between the first oil port and the second oil port, a second check valve is further arranged on the first oil port and the second oil port, and the first oil port and the second oil port are connected with the hydraulic control valve oil way through the second check valve.
The variable cylinder is provided with a rod cylinder oil port and a rodless cylinder oil port, the rod cylinder oil port is connected with a second oil port oil way, and the rodless cylinder oil port is connected with a hydraulic control valve oil way.
The hydraulic control valve includes first hydraulic control valve and second hydraulic control valve, first hydraulic control valve and second hydraulic control valve oil circuit connection, first hydraulic control valve and rodless cylinder oil mouth oil circuit connection, the switching-over control end and the second check valve oil circuit connection of first hydraulic control valve, the switching-over control end and the variable speed of second hydraulic control valve oil mouth oil circuit connection, the second hydraulic control valve is connected with oil return opening oil circuit.
The main path reversing valve is a three-position four-way reversing valve, and the electromagnetic reversing valve is a two-position three-way electromagnetic reversing valve or a two-position four-way electromagnetic reversing valve.
The system is also provided with a speed regulating switch which is electrically connected with a speed changing controller, and the speed changing controller is an ECU, a singlechip or a PLC.
The utility model discloses a hydraulic control system of HD1D motor for power head motor, which is provided with a plurality of groups of power head motors, each group of power head motors is provided with an electromagnetic directional valve, the electromagnetic directional valve is electrically connected with a variable speed controller, the electromagnetic directional valve has different reversing states by outputting different electric signals through the variable speed controller, the displacement of hydraulic oil in a power head motor can be changed after the electromagnetic directional valve is reversed, the multi-gear speed regulation of the power motor is carried out by adjusting the hydraulic displacement of the power motor, the plurality of groups of power head motors are also connected with the oil circuit of the main way reversing valve, the main way reversing valve provides hydraulic oil for the power head motors, make the power motor rotate, the utility model discloses a HD 1D's unit head motor combines the regulation that realizes different gears with the solenoid directional valve, for many gears control provides the hardware and supports, is favorable to improving the income rock ability of rig.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the implementations of the present invention, and not all implementations, and all other embodiments obtained by those skilled in the art without any inventive work are included in the scope of the present invention.
As shown in fig. 1, a hydraulic control system for a power head motor of HD1D motor includes an oil tank 29, at least three sets of power head motors 1, an electromagnetic directional valve 15, a pilot oil pump 30, a main directional valve 22 and a shift controller 18, wherein, the oil tank 29 is connected with the oil path of the main path directional control valve 22, the main path directional control valve 22 is connected with the oil path of at least three groups of power head motors 1, the power head motor 1 and the electromagnetic directional valve 15 are arranged in pairs, the electromagnetic directional valve 15 arranged in pairs is connected with the oil path of the power head motor 1, the electromagnetic directional valve 15 is connected with an oil tank 29 through a pilot oil pump 30, the electromagnetic directional valve 15 is also electrically connected with a speed change controller 18, the speed change controller 18 is provided with different output pins, the different output pins output different electric signals, and different electromagnetic directional valves 15 are electrically connected with the different output pins.
Each electromagnetic directional valve 15 is provided with an electric control end 14, a first oil guide port 16, a second oil guide port 13 and a third oil guide port 17, the electric control end 14 on each electromagnetic directional valve 15 is electrically connected with a variable speed controller 18, the first oil guide port 16 on each electromagnetic directional valve 15 is connected with an oil way of a pilot oil pump 30, the second oil guide port 13 on each electromagnetic directional valve 15 is connected with different oil ways of the power head motor 1, and the third oil guide port 17 on each electromagnetic directional valve 15 is connected with an oil way of an oil tank 29.
Each power head motor 1 is provided with a first oil port 2, a second oil port 11, a speed change control oil port 3 and an oil return port 10, wherein the oil return port 10 on each power head motor 1 is connected with an oil tank 29 oil way, the speed change control oil ports 3 on different power head motors 1 are respectively connected with second oil guide ports 13 oil ways on different electromagnetic directional valves 15, and each power head motor 1 is connected with the main directional valve 22 oil way through the first oil port 2 and the second oil port 11.
The main circuit directional control valve 22 is provided with a first reversing oil port 21, a second reversing oil port 26, a first control oil port 27, a second control oil port 20, a third control oil port 24 and a fourth control oil port 23, wherein the first reversing oil port 21 and the second reversing oil port 26 are connected with different oil paths of the pilot oil pump 30, the first control oil port 27 is respectively connected with oil paths of the first oil ports 2 on different power head motors 1, the second control oil port 20 is respectively connected with oil paths of the second oil ports 11 on different power head motors 1, and the third control oil port 24 and the fourth control oil port 23 are connected with oil paths of the oil tank 29.
The main path directional control valve 22 is further provided with a main pump 28 and a check valve 25, and the third control oil port 24 is connected with an oil tank 29 through the check valve 25 and the main pump 28.
The hydraulic control unit is characterized in that a hydraulic motor 12, a hydraulic control valve and a variable cylinder 7 are arranged in the power head motor 1, the 12 oil way of the hydraulic motor is connected between a first oil port 2 and a second oil port 11, a second check valve 5 is further arranged on the first oil port 2 and the second oil port 11, and the first oil port 2 and the second oil port 11 are both connected with the hydraulic control valve oil way through the second check valve 5.
The variable cylinder 7 is provided with a rod cylinder oil port 8 and a rodless cylinder oil port 6, the rod cylinder oil port 8 is connected with a second oil port 11 oil way, and the rodless cylinder oil port 6 is connected with a hydraulic control valve oil way.
The hydraulic control valve includes first hydraulic control valve 4 and second hydraulic control valve 9, first hydraulic control valve 4 and the 9 oil circuit connection of second hydraulic control valve, first hydraulic control valve 4 and no pole jar hydraulic fluid port 6 oil circuit connection, the switching-over control end and the 5 oil circuit connection of second check valve of first hydraulic control valve 4, the switching-over control end and the 3 oil circuit connection of variable speed accuse hydraulic fluid port of second hydraulic control valve 9, second hydraulic control valve 9 and return oil port 10 oil circuit connection.
The main path reversing valve 22 is a three-position four-way reversing valve, and the electromagnetic reversing valve 15 is a two-position three-way electromagnetic reversing valve 15 or a two-position four-way electromagnetic reversing valve 15.
The power head motor is also provided with a speed regulating switch 19, the speed regulating switch 19 is electrically connected with a speed changing controller 18, the speed changing controller 18 is an ECU, a single chip microcomputer or a PLC, and the speed regulating switch 19 is pressed for different times to realize different speed regulating gears.
The specific working process of the hydraulic control system of the HD1D motor for the power head motor is as follows:
pressure oil in the oil tank 29 enters the main directional control valve 22 from the main pump 28, the main directional control valve 22 can be switched to the first control oil port 27 or the second control oil port 20 to discharge oil, so as to provide pressure oil for three identical HD1D power head motors 1, and further control forward rotation and reverse rotation of the power head motors 1 to drive forward rotation and reverse rotation of the power head, the power head motor 1 is provided with the first oil port 2 and the second oil port 11, in this embodiment, preferably, the pressure oil flows in from the first oil port 2, and when the pressure oil flows out from the second oil port 11, the power head motor 1 is in a forward rotation state, and when the pressure oil flows in from the second oil port 11, and when the pressure oil flows out from the first oil port 2, the power head motor is in a reverse rotation state.
The first reversing oil port 21 and the second reversing port 26 in the main directional control valve 22 determine whether pressure oil flows from the first oil port 2 or the second oil port 11, that is, the forward rotation and the reverse rotation of the power head motor 1 are controlled;
when the first reversing oil port 21 obtains the pilot hydraulic oil from the pilot pump 30, the pilot hydraulic oil in the first reversing oil port 21 drives the main directional control valve 22 to reverse, at this time, the first control oil port 27 is conducted with the fourth control oil port 23, the second control oil port 20 is conducted with the third control oil port 24, the pressure oil in the oil tank 29 flows into the second oil port 11 through the third control oil port 24 and the second control oil port 20, the pressure oil flows into the power head motor 1 from the second oil port 11 to push the hydraulic motor 12 in the power head motor 1 to rotate in the reverse direction, and then the pressure oil flows back to the oil tank 29 through the first oil port 2, the first control oil port 27 and the fourth control oil port 23.
When the second reversing oil port 26 obtains the pilot hydraulic oil from the pilot pump 30, the pilot hydraulic oil in the second reversing oil port 26 drives the main directional control valve 22 to reverse, at this time, the first control oil port 27 is conducted with the third control oil port 24, the second control oil port 20 is conducted with the fourth control oil port 23, the pressure oil in the oil tank 29 flows into the power head motor 1 through the third control oil port 24, the first control oil port 27 and the first oil port 2, the hydraulic motor 12 is pushed to rotate in the forward direction, and then the pressure oil flows back to the oil tank 29 through the second oil port 11, the second control oil port 20 and the fourth control oil port 23.
The pilot pump 30 also simultaneously supplies pilot pressure oil to the electromagnetic directional valves 15, and the pilot pressure oil flows into the first oil guide port 16 of each electromagnetic directional valve from the oil tank 29; after the electromagnetic directional valve 15 is powered on, the electric control end 14 pushes the electromagnetic directional valve 15 to change the direction, and after the direction is changed, the pilot pressure oil flows into the power head motor 1 through the first oil guide port 16, the second oil guide port 13 and the variable speed oil control port 3 to control the displacement of the power head motor 1, and the change of the rotating speed of the power head is realized by controlling the displacement.
In the embodiment, preferably three power motor heads 1 and three electromagnetic directional valves 15 are provided, and the speed change controller 18 can output different electric signals to enable the three electromagnetic directional valves 15 to have different modes of directional states.
When the three electromagnetic directional valves 15 are not powered, no pilot pressure flows to the variable speed control oil port 3 through the electromagnetic directional valves 15 at the moment, only pressure oil flows into the variable cylinder 7 through the rod cylinder oil port 8, at the moment, the power head motor 1 is at the maximum displacement, the power head motor 1 rotates under the action of the pressure oil, at the moment, the rotating speed is first gear in the embodiment, and the speed is slowest.
After one electromagnetic directional valve 15 in the three electromagnetic directional valves 15 is powered on, when the other two electromagnetic directional valves are not powered on, the speed is at the second gear speed, after the electromagnetic directional valve 15 in the three electromagnetic directional valves is powered on, the powered electromagnetic directional valve is switched, pilot oil flows into the power motor 1 through the first oil guide port 16, the second oil guide port 13 and the speed change control oil port 3, pilot pressure oil exists in the speed change control oil port 3 of the power motor 1, the pilot oil pressure reverses the second hydraulic control valve 9 inside the power motor 1, after the direction change, the pressure oil enters the rodless cylinder through the second hydraulic control valve 9, the first hydraulic control valve 4 and the rodless oil port 6, and because the area in the rodless cylinder is larger than that in the rodless cylinder, the rodless cylinder in the variable cylinder 7 moves left, so that the displacement of the power head motor 1 is reduced;
because only one electromagnetic directional valve 15 is electrified and conducted, the displacement of only one power head motor 1 is reduced, the displacement of the remaining two power head motors 1 is still large, and the speed of the power head motors is slightly increased at the moment.
In addition, in order to prevent a certain power motor 1 from being always in a small displacement in the second gear, the frequent stress of the power motor 1 is easily uneven, and the motor is damaged; the three reversing solenoid valves 15 can be controlled in an alternating power-on mode, and if the first two-gear control is performed, the reversing valve 15 of the solenoid valve at the top in fig. 1 can be powered on; then, in the second gear control, the electromagnetic directional valve 15 in the intermediate position in fig. 1 may be energized; in the second gear control for the third time, the electromagnetic directional valve 15 at the lowest position in fig. 1 may be energized; in the fourth second-gear control, the solenoid valve 15 at the top in fig. 1 is again energized to perform the downward circulation.
After two electromagnetic directional valves 15 of the three electromagnetic directional valves 15 are powered on, when the other electromagnetic directional valves are not powered on, the speed is high at the third gear speed, the two electromagnetic directional valves 15 are powered on simultaneously to perform direction change, the pilot oil flows into the power motor 1 through the first oil guide port 16, the second oil guide port 13 and the variable speed oil control port 3, at the moment, two power motors are in small displacement, and one power motor 1 is in large displacement, so that the rotating speed in the power motor 1 is high.
In addition, in order to prevent that a certain two power motors are always in small displacement when in third gear, the frequent stress of the power motors is not uniform, and the motors are damaged; the three reversing solenoid valves 15 can be controlled in an alternating power-on mode, that is, during the first three-gear control, the middle solenoid directional valve 15 in fig. 1 and the uppermost solenoid directional valve 15 in fig. 1 are powered on; in the second third gear control, the middle electromagnetic directional valve 15 in fig. 1 and the lowest electromagnetic directional valve 15 in fig. 1 are powered; in the third gear control, the lowest electromagnetic directional valve 15 in fig. 1 and the highest electromagnetic directional valve 15 in fig. 1 are simultaneously electrified; the fourth third gear control is performed by circulating the third gear control to the middle electromagnetic directional valve 15 in fig. 1 and the uppermost electromagnetic directional valve 15 in fig. 1 to be electrified, so as to circulate the third gear control downwards.
When the three electromagnetic directional valves 15 are all powered on simultaneously, the speed is four-gear, the three electromagnetic directional valves 15 are all powered on to lead oil to flow into the power motor 1 through the first oil guide port 16, the second oil guide port 13 and the variable speed oil control port 3, at this moment, the three power motors 1 are all in small displacement, and the rotating speed of the power motor 1 is fastest.
The utility model provides a control mode that the HD1D control mode motor is applied to the rotary drilling rig power head, which has a multi-gear drilling function, and realizes four-gear control by combining the HD1D form power head motor and the electromagnetic valve; different gears can be selected according to different geological conditions, and the rock entering capability and the energy-saving effect of the drilling machine are greatly improved.
The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.
Claims (10)
1. A hydraulic control system for a head motor of a HD1D motor, comprising a tank (29), characterized in that: also comprises at least three groups of power head motors (1), electromagnetic directional valves (15), pilot oil pumps (30), a main directional valve (22) and a variable speed controller (18), wherein the oil tank (29) is connected with the oil path of the main path reversing valve (22), the main path reversing valve (22) is connected with the oil path of at least three groups of power head motors (1), the power head motor (1) and the electromagnetic directional valve (15) are arranged in pairs, the electromagnetic directional valve (15) arranged in pairs is connected with an oil path of the power head motor (1), the electromagnetic directional valve (15) is connected with an oil way of an oil tank (29) through a pilot oil pump (30), the electromagnetic directional valve (15) is also electrically connected with a variable speed controller (18), different output pins are arranged on the variable speed controller (18), different output pins output different electric signals, and different electromagnetic directional valves (15) are electrically connected with different output pins.
2. The hydraulic control system for a powerhead motor of HD1D as defined in claim 1, wherein: an electric control end (14), a first oil guide port (16), a second oil guide port (13) and a third oil guide port (17) are arranged on each electromagnetic directional valve (15), the electric control end (14) on each electromagnetic directional valve (15) is electrically connected with a variable speed controller (18), the first oil guide port (16) on each electromagnetic directional valve (15) is connected with an oil way of a pilot oil pump (30), the second oil guide port (13) on each electromagnetic directional valve (15) is connected with different oil ways of a power head motor (1), and the third oil guide port (17) on each electromagnetic directional valve (15) is connected with an oil way of an oil tank (29).
3. The hydraulic control system for a powerhead motor of HD1D as defined in claim 2, wherein: all be provided with first hydraulic fluid port (2), second hydraulic fluid port (11), variable speed accuse hydraulic fluid port (3) and oil return opening (10) on every unit head motor (1), wherein, oil return opening (10) on every unit head motor (1) all with oil tank (29) oil circuit connection, variable speed accuse hydraulic fluid port (3) on different unit head motors (1) lead hydraulic fluid port (13) oil circuit connection with the second on different solenoid directional valves (15) respectively, every unit head motor (1) all through first hydraulic fluid port (2) and second hydraulic fluid port (11) with main circuit directional control valve (22) oil circuit connection.
4. The HD1D motor hydraulic control system for a powerhead motor as claimed in claim 3, wherein: the main circuit directional control valve (22) is provided with a first reversing oil port (21), a second reversing oil port (26), a first control oil port (27), a second control oil port (20), a third control oil port (24) and a fourth control oil port (23), wherein the first reversing oil port (21) and the second reversing oil port (26) are connected with different pilot oil pumps (30) through oil paths, the first control oil port (27) is connected with first oil ports (2) through oil paths on different power head motors (1) respectively, the second control oil port (20) is connected with second oil ports (11) through oil paths on different power head motors (1) respectively, and the third control oil port (24) and the fourth control oil port (23) are connected with oil paths of an oil tank (29).
5. The HD1D motor hydraulic control system for a powerhead motor of claim 4, wherein: the main path reversing valve (22) is further provided with a main pump (28) and a one-way valve (25), and the third control oil port (24) is connected with an oil path of an oil tank (29) through the one-way valve (25) and the main pump (28).
6. The HD1D motor hydraulic control system for a powerhead motor of claim 4, wherein: the hydraulic control unit is characterized in that a hydraulic motor (12), a hydraulic control valve and a variable cylinder (7) are arranged in the power head motor (1), an oil way of the hydraulic motor (12) is connected between a first oil port (2) and a second oil port (11), a second check valve (5) is further arranged on the first oil port (2) and the second oil port (11), and the first oil port (2) and the second oil port (11) are connected with the oil way of the hydraulic control valve through the second check valve (5).
7. The HD1D motor hydraulic control system for a powerhead motor as claimed in claim 6, wherein: the variable cylinder (7) is provided with a rod cylinder oil port (8) and a rodless cylinder oil port (6), the rod cylinder oil port (8) is connected with a second oil port (11) oil way, and the rodless cylinder oil port (6) is connected with a hydraulic control valve oil way.
8. The HD1D motor hydraulic control system for a powerhead motor as claimed in claim 7, wherein: the hydraulic control valve comprises a first hydraulic control valve (4) and a second hydraulic control valve (9), the first hydraulic control valve (4) is connected with an oil way of the second hydraulic control valve (9), the first hydraulic control valve (4) is connected with an oil way of a rodless cylinder oil port (6), a reversing control end of the first hydraulic control valve (4) is connected with an oil way of a second one-way valve (5), a reversing control end of the second hydraulic control valve (9) is connected with an oil way of a speed-changing oil port (3), and the second hydraulic control valve (9) is connected with an oil way of an oil return port (10).
9. The hydraulic control system for a powerhead motor of HD1D as defined in claim 1, wherein: the main path reversing valve (22) is a three-position four-way reversing valve, and the electromagnetic reversing valve (15) is a two-position three-way electromagnetic reversing valve (15) or a two-position four-way electromagnetic reversing valve (15).
10. The hydraulic control system for a powerhead motor of HD1D as defined in claim 1, wherein: the system is also provided with a speed regulating switch (19), the speed regulating switch (19) is electrically connected with a speed changing controller (18), and the speed changing controller (18) is an ECU, a singlechip or a PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023291652.5U CN214196805U (en) | 2020-12-30 | 2020-12-30 | Hydraulic control system for HD1D motor used for power head motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023291652.5U CN214196805U (en) | 2020-12-30 | 2020-12-30 | Hydraulic control system for HD1D motor used for power head motor |
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| Publication Number | Publication Date |
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| CN214196805U true CN214196805U (en) | 2021-09-14 |
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| CN202023291652.5U Active CN214196805U (en) | 2020-12-30 | 2020-12-30 | Hydraulic control system for HD1D motor used for power head motor |
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| Country | Link |
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| CN (1) | CN214196805U (en) |
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2020
- 2020-12-30 CN CN202023291652.5U patent/CN214196805U/en active Active
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Address after: 451482, three story, general office building, 88 oyu Road, Zhengzhou economic and Technological Development Zone, Henan. Patentee after: Yutong heavy equipment Co.,Ltd. Address before: 451482, three story, general office building, 88 oyu Road, Zhengzhou economic and Technological Development Zone, Henan. Patentee before: ZHENGZHOU ZHENGYU HEAVY INDUSTRY Co.,Ltd. |
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