CN113653685A - Hydraulic system of concrete mixer truck - Google Patents
Hydraulic system of concrete mixer truck Download PDFInfo
- Publication number
- CN113653685A CN113653685A CN202111062228.XA CN202111062228A CN113653685A CN 113653685 A CN113653685 A CN 113653685A CN 202111062228 A CN202111062228 A CN 202111062228A CN 113653685 A CN113653685 A CN 113653685A
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- Prior art keywords
- valve
- load
- hydraulic
- sensitive
- priority
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- 239000003921 oil Substances 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims description 4
- 239000000446 fuel Substances 0.000 claims 4
- 230000005611 electricity Effects 0.000 claims 3
- 239000010729 system oil Substances 0.000 claims 1
- 238000003756 stirring Methods 0.000 abstract description 18
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 239000010720 hydraulic oil Substances 0.000 abstract description 5
- 238000005065 mining Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/42—Apparatus specially adapted for being mounted on vehicles with provision for mixing during transport
- B28C5/4203—Details; Accessories
- B28C5/4206—Control apparatus; Drive systems, e.g. coupled to the vehicle drive-system
- B28C5/421—Drives
- B28C5/4213—Hydraulic drives
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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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
- F15B11/161—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load
- F15B11/162—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors with sensing of servomotor demand or load for giving priority to particular servomotors or users
-
- 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
- F15B13/06—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with two or more servomotors
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention provides a hydraulic system of a concrete mixer truck, which comprises a load sensitive variable pump, a priority valve bank, a load sensitive steering gear, a steering cylinder, an electro-hydraulic multi-way valve, a mixing tank motor, a water pump motor, a left support leg cylinder, a right support leg cylinder, a support leg multi-way valve and an oil tank, wherein the priority valve bank is matched with the load sensitive steering gear and supplies oil to the steering cylinder through the load sensitive variable pump, the priority valve bank is matched with the electro-hydraulic multi-way valve and supplies oil to the mixing tank motor and the water pump motor through the load sensitive variable pump, the priority valve bank is sequentially matched with the electro-hydraulic multi-way valve and the support leg multi-way valve, supplies oil to the left support leg cylinder and the right support leg cylinder through the load sensitive variable pump, and supplies oil to the load sensitive variable pump and receives system return oil. The invention adopts the load-sensitive pump and the load-sensitive multi-way valve to realize the supply of the flow of the stirring system as required, thereby avoiding the overflow of redundant hydraulic oil and reducing the heating.
Description
Technical Field
The invention relates to the field of underground mining machinery in general, and particularly relates to a hydraulic steering system of a concrete mixer truck.
Background
Underground mine tunnel is narrow, and ground pothole, mire, light are darker, and conventional concrete mixer truck is bulky, and maneuvering cross-country performance is not enough, can't satisfy the operating mode requirement. The special concrete mixer truck for the mine is produced at the same time and has the volume of 3-6m3. The mining concrete mixer truck adopts full hydraulic power steering and full hydraulic braking, and is additionally provided with hydraulic support legs, a water pump driven by a hydraulic motor and a fan driven by the hydraulic motor.
At present, most domestic and foreign concrete mixer trucks adopt closed hydraulic systems, the structures of closed hydraulic pumps and motors are complex, the size is large, most of the closed hydraulic pumps and the motors are imported elements, and the price is high. In addition, the hydraulic pump of the closed system is difficult to drive double motors with large load difference, and the sharing of an oil source cannot be realized. This solution is difficult to apply to mining concrete mixer trucks.
Some small-size truckles adopt the open system of single gear pump, and its jar body rotational speed scope is narrower, depends on the rotational speed scope of engine, and the gear ratio of jar body rotational speed is less than 3.5, for the rotational speed scope of the increase jar body, adopts the throttle speed governing, causes the truckle during transportation hydraulic system to generate heat a large amount (the rotational speed of the jar body is lower this moment, only about 2 r/min).
The double gear pump open hydraulic system for concrete mixer truck consists of double pump, change valve and cycloid motor, and can realize the simultaneous oil supply of small pump, large pump and double pump and reach the rotation speed of tank body in the range of 1.5-16 r/min. This solution does not allow a continuous control of the rotation speed of the tank.
Disclosure of Invention
The main object of the present invention is to overcome at least one of the above drawbacks of the prior art, and to provide a hydraulic system for a concrete mixer truck, which can continuously adjust the rotation speed of a mixer drum in proportion on the basis of preferential steering, is not affected by the rotation speed of an engine, and can supply pressure oil to a leg system and a water pump system.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to one aspect of the invention, a hydraulic system of a concrete mixer truck is provided, comprising a load-sensitive variable displacement pump, a priority valve bank, a load-sensitive steering gear, a steering cylinder, an electro-hydraulic multi-way valve, a mixer drum motor, a water pump motor, a left leg cylinder, a right leg cylinder, a leg multi-way valve and an oil tank, wherein the priority valve bank is matched with the load-sensitive steering gear, the load-sensitive variable pump supplies oil to the steering cylinder, the priority valve bank is matched with the electro-hydraulic multi-way valve, the load-sensitive variable pump supplies oil to the stirring tank motor and the water pump motor, the priority valve group is sequentially matched with the electro-hydraulic multi-way valve and the supporting leg multi-way valve, the left leg cylinder and the right leg cylinder are supplied with oil through the load sensitive variable pump, and the oil tank supplies oil to the load sensitive variable pump and receives system return oil.
According to one embodiment of the invention, the electro-hydraulic multi-way valve is an electro-hydraulic proportional load sensitive valve.
According to an embodiment of the present invention, the priority valve group includes a priority valve, a shuttle valve, a throttle plug, a safety valve and a direct-acting overflow valve, the direct-acting overflow valve is controlled by the load of the load-sensitive steering gear, and the priority valve, the shuttle valve and the load-sensitive steering gear form a load-sensitive steering system to realize priority steering.
According to an embodiment of the invention, the priority valve is a threaded cartridge valve.
According to an embodiment of the invention, the safety valve is a direct-acting overflow valve.
According to an embodiment of the invention, a hydraulic lock is arranged between the support leg multi-way valve and the left support leg cylinder and the right support leg cylinder.
According to an embodiment of the invention, a large-flow oil suction filter is connected to the outlet channel of the oil tank.
According to an embodiment of the invention, a high-precision oil return filter is connected and arranged at the tail end of the oil return channel of the oil tank.
According to the technical scheme, the hydraulic system of the concrete mixer truck has the advantages and positive effects that:
1. according to the invention, the load-sensitive pump and the load-sensitive multi-way valve are adopted, so that the flow of the stirring system can be supplied as required, the overflow of redundant hydraulic oil is avoided, and the heating is reduced.
2. The motor of the stirring tank is controlled by an electro-hydraulic proportional load sensitive valve, the stepless speed change regulation (0-15r/min) of the rotating speed of the tank can be realized, and the requirements of low-speed rotation during transportation and high-speed rotation during unloading are met.
3. The system adopts the combined priority valve group, avoids the limitation of the highest pressure of the stirring system due to the highest pressure of the conventional priority valve, and fully exerts the high-pressure advantage of the variable pump.
4. The cost is low, and the function of the load sensitive valve is realized by combining the working oil port of the electro-hydraulic proportional load sensitive valve and the conventional multi-way valve with low cost.
5. The control handle of the stirring tank can be flexibly arranged and is not restricted by the position of the load-sensitive multi-way valve.
6. The water pump motor can run at a constant speed and is not influenced by the rotating speed of the engine.
7. The performance advantage of the variable pump is fully exerted, the stirring tank runs at low speed and turns more during transportation, and the stirring tank does not move during unloading and rotates at high speed.
Drawings
Various objects, features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:
FIG. 1 is a schematic illustration of the hydraulic system of the concrete mixer truck of the present invention shown in an exemplary embodiment.
Fig. 2 is a schematic diagram of a priority valve block in the hydraulic system of the concrete mixer truck of the present invention shown in an exemplary embodiment.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
In the following description of various examples of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various example structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "top," "bottom," "front," "back," "side," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples described in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of the invention.
FIG. 1 is a schematic illustration of the hydraulic system of the concrete mixer truck of the present invention shown in an exemplary embodiment. Fig. 2 is a schematic diagram of a priority valve block in the hydraulic system of the concrete mixer truck of the present invention shown in an exemplary embodiment.
As shown in fig. 1 and 2, the hydraulic system of the concrete mixer truck of the present invention includes a load-sensitive variable displacement pump 1, a priority valve bank 2, a load-sensitive steering gear 3, a steering cylinder 4, an electro-hydraulic multi-way valve 5, a mixer drum motor 6, a water pump motor 7, a left leg cylinder 8, a right leg cylinder 9, a leg multi-way valve 11, and an oil tank.
The priority valve bank 2 is matched with the load sensitive steering gear 3, oil is supplied to the steering cylinder 4 through the load sensitive variable pump 1, the priority valve bank 2 is matched with the electro-hydraulic multi-way valve 5, and oil is supplied to the stirring tank motor 6 and the water pump motor 7 through the load sensitive variable pump 1. In addition, the priority valve group 2 is sequentially matched with the electro-hydraulic multi-way valve 5 and the supporting leg multi-way valve 11, oil is supplied to the left supporting leg cylinder 8 and the right supporting leg cylinder 9 through the load sensitive variable pump 1, and the oil tank supplies oil to the load sensitive variable pump 1 and receives system return oil.
In the embodiment of the invention, the electro-hydraulic multi-way valve 5 is an electro-hydraulic proportional load sensitive valve.
In this embodiment of the invention, the priority valve group 2 includes a priority valve 2.1, a shuttle valve 2.2, a choke plug 2.3, a safety valve 2.4 and a direct-acting overflow valve 2.5. Wherein, the direct overflow valve 2.5 is controlled by the load of the load sensitive steering gear 3, and the priority valve 2.1, the shuttle valve 2.2 and the load sensitive steering gear 3 form a load sensitive steering system to realize the priority steering.
In this embodiment of the invention, the priority valve 2.1 is a threaded cartridge valve. In this embodiment of the invention, the safety valve 2.4 is a direct-acting overflow valve. In this embodiment of the invention, a hydraulic lock 10 is arranged between the support leg multi-way valve 11 and the left support leg cylinder 8 and the right support leg cylinder 9. In this embodiment of the present invention, a large flow oil suction filter 13 is connected to the outlet channel of the oil tank. In this embodiment of the invention, a high-precision oil return filter 12 is connected and arranged at the tail end of the oil return channel of the oil tank.
Since the rated pressure of the conventional variable plunger pump is 28MPa or 32MPa, and the inlet pressure of the universal priority valve is 20MPa at most, the highest pressure of the stirring system is limited, and the high-pressure advantage of the variable plunger pump cannot be exerted. In this embodiment of the invention, therefore, a combined priority valve group 2 is used, with a built-in system safety valve 2.4, a steering system pressure limiting valve 2.5 and a shuttle valve 2.2.
In the embodiment of the invention, the priority valve 2.1 is preferably a threaded cartridge valve, and the safety valve 2.4 can be a direct-acting overflow valve or a pilot-operated overflow valve according to the maximum system. The safety valve 2.4 is used for protecting the load-sensitive pump and avoiding the pump from being damaged due to failure and unloading failure; the direct-acting overflow valve 2.5 limits the maximum steering pressure. The priority valve 2.1, the shuttle valve 2.2 and the steering gear 3 form a load sensitive steering system, so that priority steering is realized, and the driving safety is ensured. The electro-hydraulic load sensitive valve 5 is controlled by an electric control proportional handle to form a load sensitive system with the load sensitive pump 1, so that the continuous regulation of the rotating speed of the stirring tank is realized, the low-speed rotation of the tank body during running is realized, and the high-speed rotation during unloading is realized; meanwhile, the overflow of hydraulic oil is avoided, and the heating of the system is reduced.
In the embodiment of the invention, the water pump motor 7 is controlled by the electro-hydraulic load sensitive valve 5, the rotating speed of the water pump motor is only dependent on the opening degree of the valve core and is not influenced by the rotating speed of the engine, the overspeed of the water pump is avoided, and the discharge capacity of the water pump motor 7 can be properly reduced.
In the embodiment of the invention, the supporting leg multi-way valve 10 is supplied with oil from the port B2 of the electro-hydraulic load sensitive valve 5, the maximum flow of the supporting leg system can be limited by setting the valve core opening, and unnecessary overflow of the system is reduced.
In the embodiment of the invention, the electromagnetic coil of the port B2 of the electro-hydraulic load sensitive valve 5 is controlled by a switch through a controller, the switch is arranged near the support leg multi-way valve 10, and after a parking brake is applied, the switch is pressed down, the electromagnetic coil is electrified, and the valve core is opened.
In the embodiment of the invention, the P port of the priority valve group 2 is connected with the outlet of the variable pump 1, the LS port of the variable pump 1 is connected with the LS port, the CF port and the LS1 are connected with the P port and the LS port of the steering gear 3, the EF1 port and the LS2 are connected with the P port and the LS port of the electric liquid load sensitive valve 5, and the T port is connected with the inlet of the oil filter 11. The port L, R of the steering gear 3 is connected with two oil ports of the steering cylinder 4; the ports A1 and B1 of the electro-hydraulic load sensitive valve 5 are connected with the working oil ports of the stirring tank motor 6, the port A2 is connected with the inlet of the water pump motor 7, the port B2 is connected with the port P of the supporting leg multi-way valve 10, and the supporting leg multi-way valve 10 is connected with the supporting leg oil cylinders 8 and 9 through hydraulic locks.
When the vehicle went, the agitator tank low-speed rotation, the flow that needs this moment is less, and the variable pump is in little discharge capacity state, and when steering wheel control steering gear left turn, the L mouth and the P mouth intercommunication of steering gear to through LS1 mouth of LS mouth intercommunication priority valves 2, and then the LS of intercommunication variable pump 1, control variable pump 1 increase discharge capacity, satisfy the demand that turns to. The right turn is similar.
When unloading, the vehicle stops, parking brake is applied, the vehicle is steered to be stationary, the oil supply switch of the supporting leg multi-way valve 10 is pressed, the handle of the multi-way valve is operated, the supporting leg oil cylinder is controlled to be supported, and the height of the unloading chute is increased.
The oil supply of the supporting leg multi-way valve 10 and the water pump motor 7 are controlled by a three-position switch, the water pump end is self-locked, the supporting leg end is self-reset, the switch is released, the oil supply to the supporting leg multi-way valve is immediately stopped, unnecessary hydraulic oil empty circulation is reduced, and system heating is reduced.
The rotation speed of the water pump motor 7 is controlled by a rotary potentiometer, and the water pump motor 7 is started only when the water pump/support leg switch is switched to a water pump position and the rotary potentiometer is not zero. Since the hydraulic motor has a minimum speed requirement, the output of the controller increases gradually from an initial value, rather than from zero, as the potentiometer signal increases.
In the embodiment of the invention, the following advantages and positive effects are achieved:
1. according to the invention, the load-sensitive pump and the load-sensitive multi-way valve are adopted, so that the flow of the stirring system can be supplied as required, the overflow of redundant hydraulic oil is avoided, and the heating is reduced.
2. The motor of the stirring tank is controlled by an electro-hydraulic proportional load sensitive valve, the stepless speed change regulation (0-15r/min) of the rotating speed of the tank can be realized, and the requirements of low-speed rotation during transportation and high-speed rotation during unloading are met.
3. The system adopts the combined priority valve group, avoids the limitation of the highest pressure of the stirring system due to the highest pressure of the conventional priority valve, and fully exerts the high-pressure advantage of the variable pump.
4. The cost is low, and the function of the load sensitive valve is realized by combining the working oil port of the electro-hydraulic proportional load sensitive valve and the conventional multi-way valve with low cost.
5. The control handle of the stirring tank can be flexibly arranged and is not restricted by the position of the load-sensitive multi-way valve.
6. The water pump motor can run at a constant speed and is not influenced by the rotating speed of the engine.
7. The performance advantage of the variable pump is fully exerted, the stirring tank runs at low speed and turns more during transportation, and the stirring tank does not move during unloading and rotates at high speed.
It should be understood by those of ordinary skill in the art that the specific constructions and processes illustrated in the foregoing detailed description are exemplary only, and are not limiting. Furthermore, the various features shown above can be combined in various possible ways to form new solutions, or other modifications, by a person skilled in the art, all falling within the scope of the present invention.
Claims (8)
1. The utility model provides a hydraulic system of concrete mixer truck, its characterized in that, includes the sensitive variable pump of load, priority valves, the sensitive steering gear of load, turns to the jar, electricity liquid multiple unit valve, agitator tank motor, water pump motor, left leg jar, right leg jar, landing leg multiple unit valve and oil tank, priority valves with the cooperation of the sensitive steering gear of load, through the sensitive variable pump of load to turn to the jar fuel feeding, priority valves with the cooperation of electricity liquid multiple unit valve, through the sensitive variable pump of load to agitator tank motor with the water pump motor fuel feeding, priority valves with electricity liquid multiple unit valve with the landing leg multiple unit valve cooperates according to the preface, through the sensitive variable pump of load to left leg jar with right leg jar fuel feeding, the oil tank to the sensitive variable pump fuel feeding of load, and the system oil return of receiving.
2. The concrete mixer truck hydraulic system of claim 1, wherein the electro-hydraulic multiplex valve is an electro-hydraulic proportional load sensing valve.
3. The hydraulic system of a concrete mixer truck according to claim 1, wherein said priority valve block includes a priority valve, a shuttle valve, a choke plug, a safety valve and a direct-acting overflow valve, said direct-acting overflow valve being load-controlled by said load-sensitive steering gear, said priority valve, said shuttle valve and said load-sensitive steering gear constituting a load-sensitive steering system for achieving priority steering.
4. The hydraulic system of a concrete mixer truck according to claim 3, wherein said priority valve is a threaded cartridge valve.
5. The hydraulic system of a concrete mixer truck according to claim 3, wherein said safety valve is a direct-acting overflow valve.
6. The hydraulic system of a concrete mixer truck according to claim 1, wherein a hydraulic lock is provided between the leg multi-way valve and the left and right leg cylinders.
7. The hydraulic system of a concrete mixer truck according to any one of claims 1 to 6, wherein a high-flow oil suction filter is connected to an outlet passage of the oil tank.
8. The hydraulic system of a concrete mixer truck according to any one of claims 1-6, wherein a high-precision oil return filter is connected to the end of the oil return channel of the oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111062228.XA CN113653685A (en) | 2021-09-10 | 2021-09-10 | Hydraulic system of concrete mixer truck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111062228.XA CN113653685A (en) | 2021-09-10 | 2021-09-10 | Hydraulic system of concrete mixer truck |
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| Publication Number | Publication Date |
|---|---|
| CN113653685A true CN113653685A (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111062228.XA Pending CN113653685A (en) | 2021-09-10 | 2021-09-10 | Hydraulic system of concrete mixer truck |
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| CN (1) | CN113653685A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103042601A (en) * | 2012-12-18 | 2013-04-17 | 江阴市卡利格机械有限公司 | Concrete mixer truck for underground coal mine |
| CN202969957U (en) * | 2012-12-27 | 2013-06-05 | 中联重科股份有限公司 | Compound drive control system of cloth equipment and cloth equipment |
| CN103601088A (en) * | 2013-11-25 | 2014-02-26 | 江苏科技大学 | Large load sensitive type tension-releasing hydraulic dragging winch |
| CN203532386U (en) * | 2013-11-01 | 2014-04-09 | 中联重科股份有限公司 | Pump truck and boom hydraulic system thereof |
| CN204055955U (en) * | 2013-11-21 | 2014-12-31 | 西华大学 | A kind of special-use vehicle steering swivel system |
| CN204279610U (en) * | 2014-10-20 | 2015-04-22 | 山东临工工程机械有限公司 | Road grader variable work steering hydraulic system |
| CN205022676U (en) * | 2015-08-12 | 2016-02-10 | 安期生鑫茂（北京）矿山机械有限公司 | Variable hydraulic system of underground mine -car |
| CN205478613U (en) * | 2016-02-17 | 2016-08-17 | 湖南鹏翔星通汽车有限公司 | Two powered hydraulic pressure systems of concrete spraying vehicle |
| CN206264141U (en) * | 2016-12-15 | 2017-06-20 | 青岛科尼乐集团有限公司 | A kind of pump truck stirring and leg control system |
| CN109306976A (en) * | 2018-11-05 | 2019-02-05 | 无锡市钻通工程机械有限公司 | A kind of load sensitive control system |
| CN209240954U (en) * | 2018-11-01 | 2019-08-13 | 青岛科诺迪尔机械有限公司 | It is a kind of can four-wheel steering mixer truck |
| CN216111499U (en) * | 2021-09-10 | 2022-03-22 | 湖北金诚信矿业服务有限公司 | Hydraulic system of concrete mixer truck |
-
2021
- 2021-09-10 CN CN202111062228.XA patent/CN113653685A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103042601A (en) * | 2012-12-18 | 2013-04-17 | 江阴市卡利格机械有限公司 | Concrete mixer truck for underground coal mine |
| CN202969957U (en) * | 2012-12-27 | 2013-06-05 | 中联重科股份有限公司 | Compound drive control system of cloth equipment and cloth equipment |
| CN203532386U (en) * | 2013-11-01 | 2014-04-09 | 中联重科股份有限公司 | Pump truck and boom hydraulic system thereof |
| CN204055955U (en) * | 2013-11-21 | 2014-12-31 | 西华大学 | A kind of special-use vehicle steering swivel system |
| CN103601088A (en) * | 2013-11-25 | 2014-02-26 | 江苏科技大学 | Large load sensitive type tension-releasing hydraulic dragging winch |
| CN204279610U (en) * | 2014-10-20 | 2015-04-22 | 山东临工工程机械有限公司 | Road grader variable work steering hydraulic system |
| CN205022676U (en) * | 2015-08-12 | 2016-02-10 | 安期生鑫茂（北京）矿山机械有限公司 | Variable hydraulic system of underground mine -car |
| CN205478613U (en) * | 2016-02-17 | 2016-08-17 | 湖南鹏翔星通汽车有限公司 | Two powered hydraulic pressure systems of concrete spraying vehicle |
| CN206264141U (en) * | 2016-12-15 | 2017-06-20 | 青岛科尼乐集团有限公司 | A kind of pump truck stirring and leg control system |
| CN209240954U (en) * | 2018-11-01 | 2019-08-13 | 青岛科诺迪尔机械有限公司 | It is a kind of can four-wheel steering mixer truck |
| CN109306976A (en) * | 2018-11-05 | 2019-02-05 | 无锡市钻通工程机械有限公司 | A kind of load sensitive control system |
| CN216111499U (en) * | 2021-09-10 | 2022-03-22 | 湖北金诚信矿业服务有限公司 | Hydraulic system of concrete mixer truck |
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