CN112224110B - Combined valve group for controlling lifting of cargo bucket and truck - Google Patents
Combined valve group for controlling lifting of cargo bucket and truck Download PDFInfo
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- CN112224110B CN112224110B CN202011164449.3A CN202011164449A CN112224110B CN 112224110 B CN112224110 B CN 112224110B CN 202011164449 A CN202011164449 A CN 202011164449A CN 112224110 B CN112224110 B CN 112224110B
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- way electromagnetic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/04—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element
- B60P1/16—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element actuated by fluid-operated mechanisms
- B60P1/162—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element actuated by fluid-operated mechanisms the hydraulic system itself
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
The invention relates to a combined valve group for lifting control of a cargo bucket and a truck, belongs to the technical field of transport vehicles, and solves the technical problems that a four-position electromagnetic proportional pilot control valve used in a truck cargo bucket lifting system cannot be produced at home, so that the product supply period is long and the maintenance is difficult. The combined valve group comprises an H-shaped two-position four-way electromagnetic directional valve and a three-position four-way electromagnetic directional valve, wherein a P port of the H-shaped two-position four-way electromagnetic directional valve is connected with a high-pressure oil source, a T port of the H-shaped two-position four-way electromagnetic directional valve is connected with an oil tank, the T port and the P port of the three-position four-way electromagnetic directional valve are respectively connected with two working oil ports of the H-shaped two-position four-way electromagnetic directional valve, and the two working oil ports of the three-position four-way electromagnetic directional valve are respectively connected with a large cylinder and a small cylinder of an oil cylinder for lifting a cargo bucket. The combined valve group can replace a four-position electromagnetic proportional pilot control valve to control the lifting process of the goods bucket of the truck, and is easy to obtain in China, so that the supply time can be greatly shortened, and the replacement and maintenance are convenient.
Description
Technical Field
The invention belongs to the technical field of transport vehicles, and particularly relates to a combined valve group for controlling lifting of a cargo bucket and a truck.
Background
At present, in a heavy material transport vehicle, a cargo bucket lifting system mainly adopts an imported four-position electromagnetic proportional pilot control valve to control a lifting valve group with a flow amplification effect, so that the functions of locking, floating, lifting, forced descending and the like of a lifting device are realized. The imported electric proportional pilot control valve is a four-position valve, the internal structure is complex, the processing is difficult, and the production is mostly carried out abroad, so that the product supply period is long and the maintenance is difficult.
Disclosure of Invention
The invention provides a combined valve group for lifting control of a cargo bucket, which is used for solving the technical problems of long product supply period and difficult maintenance caused by that a four-position electromagnetic proportional pilot control valve used in the conventional cargo bucket lifting system of a truck cannot be produced domestically.
The invention is realized by the following technical scheme: the combined valve group comprises an H-shaped two-position four-way electromagnetic directional valve and a three-position four-way electromagnetic directional valve, wherein a P port of the H-shaped two-position four-way electromagnetic directional valve is connected with a high-pressure oil source, a T port of the H-shaped two-position four-way electromagnetic directional valve is connected with an oil tank, the T port and the P port of the three-position four-way electromagnetic directional valve are respectively connected with two working oil ports of the H-shaped two-position four-way electromagnetic directional valve, and the two working oil ports of the three-position four-way electromagnetic directional valve are respectively connected with a large cylinder and a small cylinder of an oil cylinder of the cargo bucket.
Furthermore, in order to better realize the invention, the port A of the H-shaped two-position four-way electromagnetic directional valve is connected with the port P of the three-position four-way electromagnetic directional valve, and the port B of the H-shaped two-position four-way electromagnetic directional valve is connected with the port T of the three-position four-way electromagnetic directional valve.
Furthermore, in order to better realize the invention, the port A of the three-position four-way electromagnetic directional valve is connected with the large cylinder of the oil cylinder, and the port B of the three-position four-way electromagnetic directional valve is connected with the small cylinder of the oil cylinder.
Furthermore, in order to better realize the invention, the three-position four-way electromagnetic directional control valve further comprises a first pipeline, two ends of the first pipeline are respectively connected with the port B of the three-position four-way electromagnetic directional valve and the oil tank, and an overflow valve is arranged on the first pipeline.
Furthermore, in order to better realize the invention, the three-position four-way electromagnetic directional control valve further comprises a second pipeline, and two ends of the second pipeline are respectively connected with the T port of the three-position four-way electromagnetic directional valve and the oil tank.
Further, in order to better realize the invention, the three-position four-way electromagnetic directional valve is a proportional valve.
Furthermore, in order to better realize the invention, the hydraulic control system further comprises an oil path block, wherein the oil path block is connected to a frame of the truck through a bolt, and the H-shaped two-position four-way electromagnetic directional valve and the three-position four-way electromagnetic directional valve are respectively connected to the oil path block through screws.
Further, in order to better realize the invention, sealing rings are respectively arranged between the H-shaped two-position four-way electromagnetic directional valve and the oil path block and between the three-position four-way electromagnetic directional valve and the oil path block.
Further, in order to better implement the present invention, the seal ring is a rubber seal ring.
The truck provided by the invention comprises the combined valve bank for controlling the lifting of the cargo bucket.
Compared with the prior art, the invention has the following beneficial effects:
(1) the combined valve group for controlling the lifting of the cargo bucket comprises an H-shaped two-position four-way electromagnetic directional valve and a three-position four-way electromagnetic directional valve, wherein a P port of the H-shaped two-position four-way electromagnetic directional valve is connected with a high-pressure oil source, a T port of the H-shaped two-position four-way electromagnetic directional valve is connected with an oil tank, the T port and the P port of the three-position four-way electromagnetic directional valve are respectively connected with two working oil ports of the H-shaped two-position four-way electromagnetic directional valve, the two working oil ports of the three-position four-way electromagnetic directional valve are respectively connected with a large cylinder and a small cylinder of an oil cylinder for lifting the cargo bucket, and by the structure, when an electromagnet of the H-shaped two-position four-way electromagnetic directional valve and two electromagnets of the three-position four-way electromagnetic directional valve are not electrified, hydraulic oil in the large cylinder and the small cylinder of the oil cylinder cannot flow, so that the cargo bucket can be locked, and the cargo bucket can stay at a certain position; when the electromagnet of the H-shaped two-position four-way electromagnetic reversing valve is not electrified and one electromagnet of the three-position four-way electromagnetic reversing valve is electrified, the large cylinder and the small cylinder of the oil cylinder and the P port of the H-shaped two-position four-way electromagnetic reversing valve are communicated with the oil tank; therefore, in the state, the goods bucket of the truck can push the oil cylinder piston to move towards the small cylinder under the action of the self gravity to realize slow descending; when the electromagnet of the H-shaped two-position four-way electromagnetic directional valve is electrified and one of the two electromagnets of the three-position four-way electromagnetic directional valve is selectively electrified, the large cylinder or the small cylinder of the oil cylinder can be communicated with the P port of the H-shaped two-position four-way electromagnetic directional valve, so that the lifting or forced descending of the cargo bucket is realized.
(2) The truck provided by the invention comprises the combined valve group for controlling the lifting of the cargo bucket, so that the truck is more convenient to produce and manufacture and more convenient to maintain.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a control schematic of a bucket lift control valve block assembly of the present application;
FIG. 2 is a schematic diagram of the construction of a bucket lift control valve block of the present application;
FIG. 3 is another perspective view of the structure shown in FIG. 2;
fig. 4 is another perspective view of the structure shown in fig. 3.
In the figure:
1-H type two-position four-way electromagnetic change valve;
2-a three-position four-way electromagnetic directional valve;
3-a first pipeline;
4-an overflow valve;
5-a second pipeline;
6-oil path block;
7-bolt;
8-screw.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1:
the combined valve group for lifting control of the cargo bucket comprises an H-shaped two-position four-way electromagnetic directional valve 1 and a three-position four-way electromagnetic directional valve 2, wherein a P port of the H-shaped two-position four-way electromagnetic directional valve 1 is connected with a high-pressure oil source, the high-pressure oil source is an oil pump for pumping hydraulic oil in a hydraulic work station, namely, the P port of the H-shaped two-position four-way electromagnetic directional valve 1 is connected and communicated with an outlet of the oil pump to inject the high-pressure hydraulic oil into the H-shaped two-position four-way electromagnetic directional valve 1, a T port of the H-shaped two-position four-way electromagnetic directional valve 1 is connected with an oil tank to guide the hydraulic oil back to the oil tank, a T port and a P port of the three-position four-way electromagnetic directional valve 2 are respectively connected with two working oil ports of the H-shaped two-position four-way electromagnetic directional valve 1, when an electromagnet of the H-shaped two-position four-way electromagnetic directional valve 1 is electrified, the hydraulic oil port can enter the three-position four-way electromagnetic directional valve 2, two working oil ports of the three-position four-way electromagnetic directional valve 2 are respectively connected with a large cylinder and a small cylinder of an oil cylinder for lifting a freight car cargo bucket.
Through above-mentioned structure, accessible control H type two-position four-way solenoid directional valve 1's electro-magnet and two electro-magnets of three-position four-way solenoid directional valve 2, different electro-magnets break-make electricity and realize different functions in also three electro-magnet, specifically as follows:
in the first state, the electromagnet of the H-type two-position four-way electromagnetic directional valve 1 and the two electromagnets of the three-position four-way electromagnetic directional valve 2 are not powered, as shown in fig. 1, at this time, the H-type two-position four-way electromagnetic directional valve 1 is positioned at the left position (also called the H position), the three-position four-way electromagnetic directional valve 2 is positioned at the middle position (also called the open position), at this time, high-pressure hydraulic oil entering from the P port of the H-type two-position four-way electromagnetic directional valve 1 directly flows into the T port of the H-type two-position four-way electromagnetic directional valve 1 and returns to the oil flow tank, and because the three-position four-way electromagnetic directional valve 2 is in the open state, the hydraulic oil in the large cylinder and the small cylinder of the oil cylinder cannot flow, at this time, the locking of the oil cylinder is realized, the oil cylinder locks the freight car bucket, that is, that the freight bucket stays at the designated position, and the locking state of the freight bucket is realized;
in the second state, the electromagnet of the H-shaped two-position four-way electromagnetic directional valve 1 is not electrified, and one electromagnet of the three-position four-way electromagnetic directional valve 2 is electrified. As shown in fig. 1, at this time, the H-type two-position four-way electromagnetic directional valve 1 is located at the left position (i.e., the H position), and the three-position four-way electromagnetic directional valve 2 is located at the left position or the right position; when the three-position four-way electromagnetic directional valve 2 is in the left position, the P port of the three-position four-way electromagnetic directional valve 2 is communicated with the B port of the three-position four-way electromagnetic directional valve 2, and the T port of the three-position four-way electromagnetic directional valve 2 is communicated with the A port of the three-position four-way electromagnetic directional valve 2, so that the large cylinder and the small cylinder of the oil cylinder are both communicated with the T port of the H-shaped two-position four-way electromagnetic directional valve 1, namely the large cylinder and the small cylinder of the oil cylinder are communicated with the oil tank; when the three-position four-way electromagnetic directional valve 2 is in the right position, the P port of the three-position four-way electromagnetic directional valve 2 is communicated with the A port of the three-position four-way electromagnetic directional valve 2, and the T port of the three-position four-way electromagnetic directional valve 2 is communicated with the B port of the three-position four-way electromagnetic directional valve 2, so that the large cylinder and the small cylinder of the oil cylinder are both communicated with the T port of the H-shaped two-position four-way electromagnetic directional valve 1, namely the large cylinder and the small cylinder of the oil cylinder are communicated with the oil tank. Therefore, in the second state, the large cylinder and the small cylinder of the oil cylinder and the P port of the H-shaped two-position four-way electromagnetic directional valve 1 are communicated with the oil tank, and at the moment, the truck cargo hopper pushes the oil cylinder piston to move towards the large cylinder under the action of the self gravity to realize slow and speed-reducing descending, so that the floating state of the cargo hopper is realized;
in the third state, the electromagnet of the H-shaped two-position four-way electromagnetic directional valve 1 is electrified, one electromagnet of the three-position four-way electromagnetic directional valve 2 is electrified, and the other electromagnet of the three-position four-way electromagnetic directional valve is not electrified; in the fourth state, the electromagnet of the H-shaped two-position four-way electromagnetic directional valve 1 is electrified, the other electromagnet of the three-position four-way electromagnetic directional valve 2 is electrified, and one electromagnet is not electrified. The third state and the fourth state can be summarized as that the electromagnet of the H-shaped two-position four-way electromagnetic directional valve 1 is electrified, and one of the two electromagnets of the three-position four-way electromagnetic directional valve 2 is selectively electrified. At the moment, high-pressure hydraulic oil is introduced into the port A or the port B of the three-position four-way electromagnetic directional valve 2, when the port A is introduced with the high-pressure hydraulic oil, the large cylinder of the oil cylinder is filled with the high-pressure hydraulic oil, so that the piston is pushed to move towards the small cylinder, and then the cargo hopper is lifted, and when the port B is introduced with the high-pressure hydraulic oil, the small cylinder of the oil cylinder is filled with the high-pressure hydraulic oil, so that the piston is pushed to move towards the large cylinder, and then the cargo hopper is driven to forcedly descend.
Through the structure, the combined valve group for controlling the lifting of the goods bucket can replace a four-position electromagnetic proportional pilot control valve in the prior art to control the lifting process of the goods bucket of the truck, and because the H-shaped two-position four-way electromagnetic directional valve 1 and the three-position four-way electromagnetic directional valve 2 can be very easily obtained at home, the goods supply time can be greatly shortened, and the replacement and the maintenance are convenient.
As a preferred embodiment of this embodiment, as shown in fig. 1, in this embodiment, a port a of an H-type two-position four-way electromagnetic directional valve 1 is connected to a port P of a three-position four-way electromagnetic directional valve 2, and a port B of the H-type two-position four-way electromagnetic directional valve 1 is connected to a port T of the three-position four-way electromagnetic directional valve 2. In addition, the port A of the three-position four-way electromagnetic directional valve 2 is connected with the large cylinder of the oil cylinder, and the port B of the three-position four-way electromagnetic directional valve 2 is connected with the small cylinder of the oil cylinder. When the electromagnet of the H-shaped two-position four-way electromagnetic directional valve 1 is electrified, the electromagnet on the left side of the three-position four-way electromagnetic directional valve 2 is electrified, at the moment, high-pressure hydraulic oil enters the P port of the three-position four-way electromagnetic directional valve 2 through the P port and the A port of the H-shaped two-position four-way electromagnetic directional valve 1 and finally reaches the B port of the three-position four-way electromagnetic directional valve 2 to enter the small cylinder of the oil cylinder, and therefore the freight car bucket is driven to forcedly descend; when the electromagnet of the H-shaped two-position four-way electromagnetic directional valve 1 is electrified, and the electromagnet on the right side of the three-position four-way electromagnetic directional valve 2 is electrified, at the moment, high-pressure hydraulic oil enters the P port of the three-position four-way electromagnetic directional valve 2 through the P port and the A port of the H-shaped two-position four-way electromagnetic directional valve 1 and finally reaches the A port of the three-position four-way electromagnetic directional valve 2 to enter the large cylinder of the oil cylinder, and therefore the freight car bucket is driven to lift.
As a more preferable embodiment of this embodiment, in this embodiment, a first pipeline 3 is further provided in communication between the port B of the three-position four-way electromagnetic directional valve 2 and the tank, that is, the first pipeline 3 communicates the port B of the three-position four-way electromagnetic directional valve 2 with the tank, and a relief valve 4 is provided on the first pipeline 3. Because the B mouth of the three-position four-way electromagnetic directional valve 2 is connected with the small cylinder of the oil cylinder, and the small cylinder of the oil cylinder has small acting area and can bear higher pressure, therefore, a first pipeline 3 is arranged between the B mouth of the three-position four-way electromagnetic directional valve 2 and the oil tank, an overflow valve 4 is arranged on the first pipeline 3, when the pressure of the oil flowing out from the B mouth of the three-position four-way electromagnetic directional valve 2 exceeds the oil pressure bearing value of the small cylinder of the oil cylinder, the pressure is released through the first pipeline 3, namely the overflow valve 4 can ensure that the highest pressure of the whole system does not exceed the set pressure, so that the whole oil circuit system is protected, and the service life of the combined valve group for the cargo bucket lifting control provided by the embodiment is prolonged.
As a more preferable implementation manner of this embodiment, in this embodiment, a second pipeline 5 is provided in communication between the T port of the three-position four-way electromagnetic directional valve 2 and the oil tank, that is, the second pipeline 5 communicates the T port of the three-position four-way electromagnetic directional valve 2 with the oil tank, so that oil liquid coming out of the T port of the three-position four-way electromagnetic directional valve 2 can directly flow back to the oil tank from the second pipeline 5, and thus the use stability of the combined valve group for bucket lifting control provided in this embodiment is higher.
As a more preferable implementation manner of this embodiment, the three-position four-way electromagnetic directional valve 2 in this embodiment is a proportional valve, so that the conduction degree of each oil path in the three-position four-way electromagnetic directional valve 2 is conveniently adjusted, and the lifting and forced lowering speed of the container of the cargo bucket is conveniently controlled.
As a best implementation manner of this embodiment, in this embodiment, the H-type two-position four-way electromagnetic directional valve 1 and the three-position four-way electromagnetic directional valve 2 are both connected to the oil path block 6 through screws 8, that is, the H-type two-position four-way electromagnetic directional valve 1 is connected to the oil path block 6 through screws 8, the three-position four-way electromagnetic directional valve 2 is connected to the oil path block 6 through another screw 8, and the oil path block 6 is provided with a plurality of oil holes and oil paths, which is a prior art, and therefore detailed descriptions thereof are omitted here. The oil circuit block 6 is connected to the frame of the truck through the bolt 7, so that the combined valve set for controlling the lifting of the cargo bucket provided by the embodiment is more convenient to assemble and disassemble. Sealing rings are respectively arranged between the H-shaped two-position four-way electromagnetic directional valve 1 and the oil path block 6 and between the three-position four-way electromagnetic directional valve 2 and the oil path block 6, and particularly, the sealing rings are respectively arranged at the joint of the oil port of the H-shaped two-position four-way electromagnetic directional valve 1 and the oil hole of the oil path block 6 and the vacant joint of the oil port of the three-position four-way electromagnetic directional valve 2 and the oil path block 6 so as to avoid leakage. Specifically, the seal ring is a rubber seal ring.
Example 2:
the embodiment provides a truck, which uses the combined valve bank for controlling the lifting of the cargo bucket provided in embodiment 1 to control the lifting oil way of the cargo bucket, so that the truck is more convenient to produce and manufacture and more convenient to maintain.
The above description is only for the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. The utility model provides a combined valve group of control is lifted to goods fill which characterized in that: the hydraulic lifting device comprises an H-shaped two-position four-way electromagnetic reversing valve and a three-position four-way electromagnetic reversing valve, wherein a P port of the H-shaped two-position four-way electromagnetic reversing valve is connected with a high-pressure oil source, a T port of the H-shaped two-position four-way electromagnetic reversing valve is connected with an oil tank, the T port and the P port of the three-position four-way electromagnetic reversing valve are respectively connected with two working oil ports of the H-shaped two-position four-way electromagnetic reversing valve, and the two working oil ports of the three-position four-way electromagnetic reversing valve are respectively connected with a large cylinder and a small cylinder of an oil cylinder for lifting the cargo bucket;
the port A of the H-shaped two-position four-way electromagnetic reversing valve is connected with the port P of the three-position four-way electromagnetic reversing valve, and the port B of the H-shaped two-position four-way electromagnetic reversing valve is connected with the port T of the three-position four-way electromagnetic reversing valve;
and the port A of the three-position four-way electromagnetic directional valve is connected with the large cylinder of the oil cylinder, and the port B of the three-position four-way electromagnetic directional valve is connected with the small cylinder of the oil cylinder.
2. The combination valve bank for bucket lift control of claim 1, wherein: the three-position four-way electromagnetic directional valve further comprises a first pipeline, two ends of the first pipeline are respectively connected with the port B of the three-position four-way electromagnetic directional valve and the oil tank, and an overflow valve is arranged on the first pipeline.
3. The combination valve bank for bucket lift control of claim 2, wherein: the three-position four-way electromagnetic directional valve further comprises a second pipeline, and two ends of the second pipeline are connected with the T port of the three-position four-way electromagnetic directional valve and the oil tank respectively.
4. A bucket lift controlled modular valve block as claimed in any one of claims 1 to 3 wherein: the three-position four-way electromagnetic directional valve is a proportional valve.
5. The combination valve bank for bucket lift control of claim 4, wherein: the truck is characterized by further comprising an oil path block, wherein the oil path block is connected to a truck frame through a bolt, and the H-shaped two-position four-way electromagnetic directional valve and the three-position four-way electromagnetic directional valve are connected to the oil path block through screws respectively.
6. The combination valve bank for bucket lift control of claim 5, wherein: and sealing rings are respectively arranged between the H-shaped two-position four-way electromagnetic reversing valve and the oil way block and between the three-position four-way electromagnetic reversing valve and the oil way block.
7. The combination valve bank for bucket lift control of claim 6, wherein: the sealing ring is a rubber sealing ring.
8. A truck, characterized by: a modular valve block comprising bucket lift control as claimed in any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011164449.3A CN112224110B (en) | 2020-10-27 | 2020-10-27 | Combined valve group for controlling lifting of cargo bucket and truck |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011164449.3A CN112224110B (en) | 2020-10-27 | 2020-10-27 | Combined valve group for controlling lifting of cargo bucket and truck |
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| CN112224110A CN112224110A (en) | 2021-01-15 |
| CN112224110B true CN112224110B (en) | 2022-04-26 |
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Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3900887C2 (en) * | 1989-01-13 | 1994-09-29 | Rexroth Mannesmann Gmbh | Valve arrangement for actuating the telescopic cylinder of a truck tipper |
| JP4234893B2 (en) * | 2000-09-12 | 2009-03-04 | 株式会社小松製作所 | Cylinder operation control device |
| CN201291792Y (en) * | 2008-10-16 | 2009-08-19 | 湘潭电机股份有限公司 | Lift hydraulic integrated system of electric power wheel self-discharging vehicle |
| CN101380915B (en) * | 2008-10-16 | 2010-06-02 | 湘潭电机股份有限公司 | Hydraulic integrated system for lifting electric power wheel self-discharging vehicle |
| CN203098440U (en) * | 2013-01-29 | 2013-07-31 | 湖南鸿辉科技有限公司 | Electric-wheel dump-truck lifting hydraulic integration control valve set |
| CN104421237A (en) * | 2013-09-03 | 2015-03-18 | 西安志越机电科技有限公司 | Hydraulic system for dumper lifting mechanism |
| JP6006252B2 (en) * | 2014-03-28 | 2016-10-12 | 日立建機株式会社 | Dump truck hoist equipment |
| CN204432477U (en) * | 2014-12-30 | 2015-07-01 | 航天重型工程装备有限公司 | A kind of hydraulic lifting system |
| CN204726290U (en) * | 2015-05-20 | 2015-10-28 | 徐工集团工程机械股份有限公司 | A kind of quarry tipper hydraulic lifting system |
| CN110864019A (en) * | 2019-11-28 | 2020-03-06 | 徐州海伦哲特种车辆有限公司 | Digital hydraulic leveling system of working platform of overhead working truck |
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