CN211288288U - Self-propelled traction device and hydraulic motor free wheel unlocking hydraulic system - Google Patents
Self-propelled traction device and hydraulic motor free wheel unlocking hydraulic system Download PDFInfo
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- CN211288288U CN211288288U CN201922305709.3U CN201922305709U CN211288288U CN 211288288 U CN211288288 U CN 211288288U CN 201922305709 U CN201922305709 U CN 201922305709U CN 211288288 U CN211288288 U CN 211288288U
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Abstract
The utility model discloses a self-propelled traction device and hydraulic motor free wheel unlocking hydraulic system, wherein the hydraulic motor is used for driving self-propelled equipment of the self-propelled traction device to walk, and the hydraulic motor is provided with 4 oil ports which are respectively a control oil port, an oil discharge port and two working oil ports; the hydraulic motor free wheel unlocking system comprises an unlocking motor, an unlocking oil pump, an oil tank and a pipeline, wherein a control oil port of the hydraulic motor, the unlocking oil pump, the oil tank and an oil discharging port of the hydraulic motor are sequentially communicated through the pipeline to form an unlocking hydraulic loop for unlocking the hydraulic motor into a free wheel working condition; the unlocking oil pump is driven by an unlocking motor, and the unlocking motor is connected into a pneumatic braking system or a hydraulic braking system of a tractor of the self-propelled traction type device. The utility model discloses the braking system who utilizes the tractor provides power for the unblock oil pump, provides the hydraulic oil of required pressure for the hydraulic motor freewheel unblock by the unblock oil pump, maintains hydraulic motor's freewheel operating mode.
Description
Technical Field
The application belongs to the technical field of hydraulic systems, and particularly relates to a self-propelled traction device and a hydraulic motor free wheel unlocking hydraulic system.
Background
Cargo carrying equipment such as a conventional semitrailer and a trailer, and weapons such as guns are generally towed by a tractor to be quickly transported over a long distance. However, such a device that completely depends on traction movement has poor mobility, is difficult to use in some special situations such as short and narrow situations, cannot realize small-angle turning, turning or other movements with high position precision, and often needs manual assistance for movement. To solve the above problems, the prior art often installs a driving assembly on the equipment which is moved by traction, so that the equipment becomes self-propelled equipment.
Self-propelled equipment generally has two kinds of operating modes of high-speed traction transportation and low-speed proper motion, and its actuating mechanism by oneself is hydraulic motor, because hydraulic motor only is used for driving self-propelled equipment low-speed proper motion, considers cost problem and suitability, generally chooses for use the low-speed motor when the lectotype. Under the high-speed transportation operating mode that pulls, because tractor transport speed is higher, lead to self-propelled equipment wheel rotational speed to surpass the allowable rotational speed of hydraulic motor far away, reduce hydraulic motor's life and reliability.
Disclosure of Invention
In order to solve the technical problem, the utility model provides a by oneself towed device and hydraulic motor freewheel unblock hydraulic system can switch into the freewheel operating mode at low-speed operating mode decline hydraulic motor by oneself to improve hydraulic motor's life and reliability.
The technical scheme adopted for realizing the purpose of the utility model is that, the hydraulic motor free wheel unlocking system is used for a self-propelled traction type device, the hydraulic motor is used for driving the self-propelled equipment of the self-propelled traction type device to walk, the hydraulic motor is provided with 4 oil ports, namely a control oil port, an oil unloading port and two working oil ports;
the hydraulic motor free wheel unlocking system comprises an unlocking motor, an unlocking oil pump, an oil tank and a pipeline, wherein a control oil port of the hydraulic motor, the unlocking oil pump, the oil tank and an oil discharging port of the hydraulic motor are sequentially communicated through the pipeline to form an unlocking hydraulic loop for unlocking the hydraulic motor into a free wheel working condition;
the unlocking oil pump is driven by the unlocking motor, and the unlocking motor is connected into a pneumatic braking system or a hydraulic braking system of the tractor of the self-propelled traction type device.
Preferably, a pneumatic braking system is arranged in the tractor, and the unlocking motor is connected into the pneumatic braking system.
Preferably, the air braking system comprises an air compressor, an oil-water separator, an air dryer and an air storage cylinder which are sequentially communicated through pipelines, and a braking loop communicated with the air storage cylinder; the unlocking motor is communicated with the air cylinder.
Preferably, a hydraulic oil filter communicated with the oil tank is arranged in the unlocking hydraulic circuit.
Based on the same inventive concept, the utility model also provides a self-propelled traction device, including self-propelled equipment and tractor, self-propelled equipment is provided with the work hydraulic circuit, the work hydraulic circuit includes two or more hydraulic motors, the power take off end of two or more hydraulic motors is connected respectively the wheel of self-propelled equipment, self-propelled equipment can be by the drive assembly drive from line and by the tractor traction transportation switch;
the two or more hydraulic motors are respectively provided with 4 oil ports, namely a control oil port, an oil discharge port and two working oil ports;
the self-propelled equipment is internally provided with a hydraulic motor free wheel unlocking system, the hydraulic motor free wheel unlocking system comprises an unlocking motor, an unlocking oil pump, an oil tank and a pipeline, and a control oil port of the hydraulic motor, the unlocking oil pump, the oil tank and an oil unloading port of the hydraulic motor are sequentially communicated through the pipeline to form an unlocking hydraulic loop for unlocking the hydraulic motor into a free wheel working condition;
the unlocking oil pump is driven by the unlocking motor; and a pneumatic braking system or a hydraulic braking system is arranged in the tractor, and the unlocking motor is connected into the pneumatic braking system or the hydraulic braking system.
Preferably, the working hydraulic circuit comprises a working oil pump, an electromagnetic directional valve, an oil tank and more than two hydraulic motors which are sequentially communicated through pipelines, and the more than two hydraulic motors are respectively connected into the working hydraulic circuit through respective two working oil ports;
the working oil pump is driven by an engine.
Preferably, the tractor is internally provided with an air braking system, and the air braking system comprises an air compressor, an oil-water separator, an air dryer and an air storage cylinder which are sequentially communicated through pipelines, and a braking loop communicated with the air storage cylinder; the unlocking motor is communicated with the air cylinder.
Preferably, a pressure regulating valve is arranged on a pipeline for communicating the unlocking motor with the air storage cylinder; and a hydraulic oil filter communicated with the oil tank is arranged in the unlocking hydraulic loop.
Based on the same invention concept, the utility model also provides a self-propelled traction device, including self-propelled equipment and tractor, self-propelled equipment is provided with the work hydraulic circuit, the work hydraulic circuit includes through the pipeline in proper order intercommunication work oil pump, solenoid directional valve, oil tank and more than two the hydraulic motor, the work oil pump is through engine drive, the power take off end of more than two the hydraulic motor is connected respectively the wheel of self-propelled equipment, self-propelled equipment can be by the drive subassembly drive self with by the tractor pulls the transportation between switch;
the hydraulic control system comprises more than two hydraulic motors, a hydraulic control circuit and a hydraulic control circuit, wherein the more than two hydraulic motors are respectively provided with 4 oil ports, namely a control oil port, an oil discharge port and two working oil ports;
more than two hydraulic motor's control hydraulic fluid port inserts through unblock electromagnetic reversing valve work hydraulic circuit, the access point of control hydraulic fluid port is located the intercommunication the working oil pump with on the pipeline of electromagnetic reversing valve, more than two hydraulic motor's control hydraulic fluid port unblock electromagnetic reversing valve the working oil pump the oil tank and more than two hydraulic motor's the hydraulic fluid port that unloads communicates in proper order through still pipeline, constitutes to be used for with hydraulic motor unblock is the unblock hydraulic circuit of free wheel operating mode.
Preferably, a hydraulic oil filter communicated with the oil tank is arranged in the unlocking hydraulic circuit.
According to the technical scheme, the utility model provides a by oneself towed device, self-propelled equipment can be by oneself by drive assembly drive (low-speed) and by the tractor pull (high-speed) switch between the transportation, this drive assembly's actuating mechanism is the hydraulic motor that has the free wheel operating mode more than two, also, be provided with 4 hydraulic fluid ports on this hydraulic motor, be the control hydraulic fluid port respectively, unload hydraulic fluid port and two work hydraulic fluid ports, work oil inlet and work oil return port are used for inserting hydraulic motor into work hydraulic circuit, the drive self-propelled equipment low-speed is by oneself, control hydraulic fluid port and unload the hydraulic fluid port and be used for inserting unblock hydraulic circuit with hydraulic motor, switch hydraulic motor into the free wheel operating mode when self-propelled equipment pulls the transportation at a high speed. The working condition of the free wheel of the hydraulic motor is that hydraulic oil with certain pressure is provided for the hydraulic motor to unlock a hydraulic unlocking mechanism of the hydraulic motor, all plungers of the hydraulic motor are contracted in a rotor body, so that a piston roller is separated from a stator surface, a friction pair of the hydraulic motor is reduced, and the working condition of the free wheel of the hydraulic motor is realized.
A free wheel unlocking system of a hydraulic motor is arranged in the self-propelled equipment and used for switching more than two hydraulic motors in the driving assembly into a free wheel working condition. This hydraulic motor freewheel unblock system includes unblock motor, unblock oil pump, oil tank and pipeline, and hydraulic motor's the control hydraulic fluid port, unblock oil pump, oil tank and hydraulic motor's the hydraulic fluid port that unloads communicates in proper order through the pipeline, constitutes unblock hydraulic circuit, continuously supplies the hydraulic oil of certain pressure for unblock hydraulic circuit through the unblock oil pump to maintain hydraulic motor's freewheel operating mode.
The unlocking oil pump is driven by an unlocking motor, and the unlocking motor is connected into a pneumatic braking system or a hydraulic braking system of a tractor of the self-propelled traction type device. Because hydraulic motor freewheel unblock system only starts when self-propelled equipment pulls the transportation at a high speed, and the tractor high-speed operation, its braking system keeps the running state, through in the braking system with unblock motor access tractor, can utilize the braking system of tractor to provide power for the unblock oil pump, by the hydraulic oil that unblock oil pump provided required pressure for hydraulic motor freewheel unblock, maintain hydraulic motor's freewheel operating mode. Therefore, when the self-propelled equipment is transported at high speed by the tractor, the working hydraulic circuit of the self-propelled equipment does not work, and the engine which drives the oil pump of the working hydraulic circuit to rotate stops, so that the long-time starting work of the engine is avoided, the energy loss and waste are reduced, and the service life and the reliability of the engine are improved.
Hydraulic motor free wheel unblock also can provide the hydraulic oil of required pressure through work hydraulic circuit in this self-propelled equipment, through the control hydraulic fluid port with hydraulic motor through unblock solenoid directional valve access work hydraulic circuit, unload the oil tank that the hydraulic fluid port accessed work hydraulic circuit, control hydraulic fluid port, unblock solenoid directional valve, working oil pump, oil tank and unload the oil port and communicate through the pipeline in proper order, constitute and be used for the unblock hydraulic circuit of free wheel operating mode with hydraulic motor unblock. The engine simultaneously provides the self-propelled power of the self-propelled equipment and the power for unlocking the hydraulic motor.
Drawings
Fig. 1 is a hydraulic circuit diagram of a hydraulic motor free wheel unlocking system in embodiment 1 of the present invention;
fig. 2 is a hydraulic circuit diagram of a self-propelled device of a self-propelled traction device in embodiment 2 of the present invention;
fig. 3 is a schematic structural view of a pneumatic brake system of a tractor of a self-propelled traction type device according to embodiment 2 of the present invention;
fig. 4 is a hydraulic circuit diagram of a self-propelled device of a self-propelled traction device in embodiment 3 of the present invention;
description of reference numerals: 100-hydraulic motor freewheel unlocking system; 10-unlocking a hydraulic circuit, 1-unlocking an oil pump, 2-an oil tank, 3-unlocking a motor, 4-a pipeline, 5-a hydraulic oil filter and 6-unlocking an electromagnetic directional valve; 20 a-left wheel hydraulic motor, 20 b-right wheel hydraulic motor; 21 a-left wheel, 21 b-right wheel; 30-a working hydraulic circuit, 31-a working oil pump, 32-an oil tank, 33-an engine, 34-a pipeline, 35-a hydraulic oil filter and 36-an electromagnetic directional valve; 40-a pneumatic brake system, 41-an air compressor, 42-an oil-water separator, 43-an air dryer, 44-an air storage cylinder, 45-a brake circuit, 46-a tire inflation system and 47-a pressure reducing valve.
Detailed Description
In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings by way of specific embodiments.
Example 1:
in an embodiment of the present invention, a hydraulic motor free wheel unlocking system 100 for a self-propelled traction device, the self-propelled traction device comprises a self-propelled device and a towing vehicle, the hydraulic motor is used for driving the self-propelled device to walk, so that the self-propelled device can be switched between being driven by a driving assembly to walk and being pulled by the towing vehicle to transport. The hydraulic motor freewheel unlocking system 100 is provided in a self-propelled device for switching a hydraulic motor to a freewheel operating condition when the self-propelled device is in a high-speed traction transportation process.
Be provided with 4 hydraulic fluid ports on the hydraulic motor with free wheel operating mode, be control hydraulic fluid port Y, unload hydraulic fluid port T and two work hydraulic fluid ports R, A respectively, compare two hydraulic fluid ports more than ordinary motor: and an oil port Y and an oil discharge port T are controlled. The working condition of the free wheel of the hydraulic motor is that hydraulic oil with certain pressure is provided for the hydraulic motor to unlock a hydraulic unlocking mechanism of the hydraulic motor, all plungers of the hydraulic motor are contracted in a rotor body, so that a piston roller is separated from a stator surface, a friction pair of the hydraulic motor is reduced, and the working condition of the free wheel of the hydraulic motor is realized.
Referring to fig. 1, the pressure motor freewheel unlocking system 100 of the present embodiment includes an unlocking motor 3, an unlocking oil pump 1, an oil tank 2, and a pipeline 4, wherein a control oil port Y of the hydraulic motors 20a and 20b, the unlocking oil pump 1, the oil tank 2, and oil discharge ports T of the hydraulic motors 20a and 20b are sequentially communicated through the pipeline 4, so as to form an unlocking hydraulic circuit 10 for unlocking the hydraulic motors 20a and 20b to a freewheel operating condition. For improve equipment life, in this embodiment, be provided with the hydraulic oil filter 5 (the oil tank oil feed all installs a hydraulic oil filter with the department of producing oil) with oil tank 2 intercommunication in the unblock hydraulic circuit 10, filter the impurity in the hydraulic oil.
The unlocking oil pump 1 is driven by an unlocking motor 3, and the unlocking motor 3 is connected to a pneumatic brake system 40 or a hydraulic brake system of a tractor of the self-propelled traction type device. Specifically, in this embodiment, the tractor is provided with a pneumatic braking system 40, the unlocking motor 3 is a pneumatic motor, and a pipeline is led out from an air reservoir in the pneumatic braking system 40 of the tractor and used for supplying air to the pneumatic motor to drive the pneumatic motor to rotate.
A typical pneumatic brake system 40 is shown in fig. 3, and includes an air compressor 41, an oil-water separator 42, an air dryer 43, an air reservoir 44, and a brake circuit 45 connected to the air reservoir 44 in sequence via a pipeline 4, a pipeline leading from the air reservoir 44, and a pressure reducing valve 47 installed to reduce the air pressure supplied from the air reservoir 44 to within the working range of the pneumatic motor to drive the pneumatic motor to rotate.
The hydraulic motor freewheel unlocking system 100 of the present embodiment may be applied to a self-propelled gun or other device having a low-speed self-propelled/high-speed towing condition. Use self-propelled gun as an example, when self-propelled gun is in the high-speed operating mode that pulls, the tractor air supply (gas receiver 44) is connected in pneumatic motor (unblock motor 3), because when pulling, tractor air compressor is the work all the time, can provide continuous stable air supply for pneumatic motor, guarantee that pneumatic motor can last stable work, left, right wheel hydraulic motor 20a, 20b control hydraulic fluid port Y mouth provides the hydraulic oil of the required pressure of hydraulic motor free wheel unblock, and return hydraulic tank through draining port T mouth, form complete unblock hydraulic circuit. The hydraulic motor is ensured to be always under the working condition of unlocking the free wheel in the running process, and the normal running of the self-propelled gun is ensured.
Example 2:
based on the same inventive concept, the present embodiment provides a self-propelled traction type device, which comprises a self-propelled device and a tractor, wherein the self-propelled device is provided with a working hydraulic circuit 30 for driving wheels of the self-propelled device to rotate, an executing mechanism of the working hydraulic circuit 30 is two or more hydraulic motors 20a and 20b, power output ends of the two or more hydraulic motors 20a and 20b are respectively connected with the wheels 21a and 21b of the self-propelled device, and the self-propelled device can be switched between self-propelled driving by a driving assembly and traction transportation by the tractor. When the self-propelled device is hauled by a tractor, both the two or more hydraulic motors 20a, 20b are switched to the free-wheel operating condition.
The self-propelled pulling device of the present embodiment will now be described in detail by taking a self-propelled gun as an example:
the self-propelled gun has two driving wheels 21a, 21b, which are provided with wheel driving force by a working hydraulic circuit 30. Referring to fig. 2, the working hydraulic circuit 30 includes a working oil pump 31, an electromagnetic directional valve 36, an oil tank 32, and two hydraulic motors 20a and 20b, which are sequentially communicated through a line 34, wherein the working oil pump 31 is driven by an engine 33, and the two hydraulic motors 20a and 20b are respectively connected to the working hydraulic circuit 30 through respective working oil ports R, A. The electromagnetic directional valve 36 has at least 3 operating positions, and the direction of the oil path of the working hydraulic circuit 30 can be changed by switching the electromagnetic directional valve 36 to a different operating position.
Since the actuator of the working hydraulic circuit 30 needs to be adapted to the high-speed traction condition, the whole hydraulic system of the self-propelled gun comprises a hydraulic motor free wheel unlocking system 100 besides the working hydraulic circuit 30. The hydraulic motor freewheel unlocking system 100 is provided in a self-propelled device for switching a hydraulic motor to a freewheel operating condition when the self-propelled device is in a high-speed traction transportation process.
Be provided with 4 hydraulic fluid ports on the hydraulic motor with free wheel operating mode, be control hydraulic fluid port Y, unload hydraulic fluid port T and two work hydraulic fluid ports R, A respectively, compare two hydraulic fluid ports more than ordinary motor: and an oil port Y and an oil discharge port T are controlled. The working condition of the free wheel of the hydraulic motor is that hydraulic oil with certain pressure is provided for the hydraulic motor to unlock a hydraulic unlocking mechanism of the hydraulic motor, all plungers of the hydraulic motor are contracted in a rotor body, so that a piston roller is separated from a stator surface, a friction pair of the hydraulic motor is reduced, and the working condition of the free wheel of the hydraulic motor is realized.
Referring to fig. 2, the pressure motor freewheel unlocking system 100 of the present embodiment includes an unlocking motor 3, an unlocking oil pump 1, an oil tank 2, and a pipeline 4, wherein the control oil ports Y of the hydraulic motors 20a and 20b, the unlocking oil pump 1, the oil tank 2, and the oil discharge ports T of the hydraulic motors 20a and 20b are sequentially communicated through the pipeline 4, so as to form an unlocking hydraulic circuit 10 for unlocking the hydraulic motors 20a and 20b to a freewheel operating condition.
For improve equipment life, in this embodiment, be provided with the hydraulic oil filter 5 (the oil tank oil feed all installs a hydraulic oil filter with the department of producing oil) with oil tank 2 intercommunication in the unblock hydraulic circuit 10, filter the impurity in the hydraulic oil. The unlocking hydraulic circuit 10 and the working hydraulic circuit 30 are two parallel and independent hydraulic circuits, and in order to simplify the structure of the equipment, in this embodiment, the unlocking hydraulic circuit 10 and the working hydraulic circuit 30 share the oil tank and the hydraulic oil filter 5.
The unlocking oil pump 1 is driven by the unlocking motor 3, the unlocking motor 3 is connected into the air pressure braking system 40 of the gun tractor, correspondingly, the unlocking motor 3 adopts a pneumatic motor, and a pipeline is led out from an air cylinder in the air pressure braking system 40 of the tractor and used for supplying air to the pneumatic motor and driving the pneumatic motor to rotate.
The pneumatic brake system 40 of the gun tractor is constructed as shown in fig. 3, and includes an air compressor 41, an oil-water separator 42, an air dryer 43 and an air reservoir 44 which are sequentially communicated through a pipe 4, and a brake circuit 45 communicated with the air reservoir 44, and compressed air generated by the air compressor 41 is used not only for vehicle braking but also for tire inflation and other auxiliary systems. The air dryer 43 thus employs multiple air dryers, such as six air dryers, each of which has a different air pressure at its respective outlet, and each of which is connected to an air reservoir 44 for supplying air to different objects. A pipeline is led out from one of the air storage cylinders 44, a pressure reducing valve 47 is installed, the air pressure provided by the air storage cylinder 44 is reduced to be within the working range of the pneumatic motor, and the pneumatic motor is driven to rotate.
In a preferred embodiment, a pressure regulating valve is arranged on a pipeline for communicating the unlocking motor 3 with the air storage cylinder, and the air pressure output to the pneumatic motor is regulated through the pressure regulating valve, so that the unlocking device is suitable for pneumatic motors with different specifications, the output pressure of the pneumatic motor can be regulated at will to adapt to the pressure required by unlocking free wheels of different types of motors, the generalization degree is high, and the adaptability is good.
Example 3:
based on the same inventive concept, the present embodiment also provides a self-propelled traction device, which includes a self-propelled device and a towing vehicle, the self-propelled device is provided with a working hydraulic circuit 30 for driving wheels of the self-propelled device to rotate, an executing mechanism of the working hydraulic circuit 30 is two or more hydraulic motors 20a and 20b, power output ends of the two or more hydraulic motors 20a and 20b are respectively connected with the wheels 21a and 21b of the self-propelled device, and the self-propelled device can be switched between self-propelled driving by a driving assembly and towing transportation by the towing vehicle. When the self-propelled device is hauled by a tractor, both the two or more hydraulic motors 20a, 20b are switched to the free-wheel operating condition.
The self-propelled pulling device of the present embodiment will now be described in detail by taking a self-propelled gun as an example:
the self-propelled gun has two driving wheels 21a, 21b, which are provided with wheel driving force by a working hydraulic circuit 30. Referring to fig. 4, the working hydraulic circuit 30 includes a working oil pump 31, an electromagnetic directional valve 36, an oil tank 32, and two hydraulic motors 20a and 20b, which are sequentially communicated through a line 34, wherein the working oil pump 31 is driven by an engine 33, and the two hydraulic motors 20a and 20b are respectively connected to the working hydraulic circuit 30 through respective working oil ports R, A. The electromagnetic directional valve 36 has at least 3 operating positions, and the direction of the oil path of the working hydraulic circuit 30 can be changed by switching the electromagnetic directional valve 36 to a different operating position.
Because the actuating mechanism of the working hydraulic circuit 30 needs to adapt to the high-speed traction working condition, the whole hydraulic system of the self-propelled gun comprises an unlocking hydraulic circuit 10 besides the working hydraulic circuit 30, and the unlocking hydraulic circuit is used for switching the hydraulic motor to the free wheel working condition when the self-propelled equipment is in the high-speed traction transportation process.
Be provided with 4 hydraulic fluid ports on the hydraulic motor with free wheel operating mode, be control hydraulic fluid port Y, unload hydraulic fluid port T and two work hydraulic fluid ports R, A respectively, compare two hydraulic fluid ports more than ordinary motor: and an oil port Y and an oil discharge port T are controlled. The working condition of the free wheel of the hydraulic motor is that hydraulic oil with certain pressure is provided for the hydraulic motor to unlock a hydraulic unlocking mechanism of the hydraulic motor, all plungers of the hydraulic motor are contracted in a rotor body, so that a piston roller is separated from a stator surface, a friction pair of the hydraulic motor is reduced, and the working condition of the free wheel of the hydraulic motor is realized.
Referring to fig. 4, in the present embodiment, the control oil ports Y of the two hydraulic motors 20a and 20b are connected to the working hydraulic circuit 30 through the unlocking electromagnetic directional valve 6, the access points of the control oil ports Y are located on a pipeline 34 that connects the working oil pump 31 and the electromagnetic directional valve 36, the oil discharge ports T of the two hydraulic motors 20a and 20b are connected to the oil tank 32, and the control oil ports Y, the unlocking electromagnetic directional valve 6, the working oil pump 31, the oil tank 2, and the oil discharge ports T are sequentially connected through another pipeline 4, so as to form the unlocking hydraulic circuit 10 for unlocking the hydraulic motors 20a and 20b to the free wheel operating condition. The unlocking electromagnetic directional valve 6 is a two-position two-way electromagnetic directional valve, when the self-propelled gun is in a high-speed traction working condition, the unlocking electromagnetic directional valve 6 is controlled to be switched to a conducting station, so that hydraulic oil in the working hydraulic circuit 30 partially flows into the unlocking hydraulic circuit 10, and the free wheel working condition of the two hydraulic motors 20a and 20b is realized.
For improve equipment life, in this embodiment, be provided with the hydraulic oil filter 5 (the oil tank oil feed all installs a hydraulic oil filter with the department of producing oil) with oil tank 2 intercommunication in the unblock hydraulic circuit 10, filter the impurity in the hydraulic oil.
Through the embodiment, the utility model has the following beneficial effect or advantage:
the utility model provides a hydraulic motor free wheel unblock system adopts pneumatic motor, and pneumatic motor inserts among the air braking system or the hydraulic braking system of the tractor of the towed device of proper motion. Because hydraulic motor freewheel unblock system only starts when self-propelled equipment pulls the transportation at a high speed, and the tractor high-speed operation, its braking system keeps the running state, through in the braking system with unblock motor access tractor, can utilize the braking system of tractor to provide power for the unblock oil pump, by the hydraulic oil that unblock oil pump provided required pressure for hydraulic motor freewheel unblock, maintain hydraulic motor's freewheel operating mode. Therefore, when the self-propelled equipment is transported at high speed by the tractor, the working hydraulic circuit of the self-propelled equipment does not work, and the engine which drives the oil pump of the working hydraulic circuit to rotate stops, so that the long-time starting work of the engine is avoided, the energy loss and waste are reduced, and the service life and the reliability of the engine are improved.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (10)
1. A hydraulic motor freewheel unlocking system for a self-propelled traction device, characterized in that: the hydraulic motor is used for driving self-propelled equipment of the self-propelled traction device to walk, and 4 oil ports are arranged on the hydraulic motor and respectively comprise a control oil port, an oil discharge port and two working oil ports;
the hydraulic motor free wheel unlocking system comprises an unlocking motor, an unlocking oil pump, an oil tank and a pipeline, wherein a control oil port of the hydraulic motor, the unlocking oil pump, the oil tank and an oil discharging port of the hydraulic motor are sequentially communicated through the pipeline to form an unlocking hydraulic loop for unlocking the hydraulic motor into a free wheel working condition;
the unlocking oil pump is driven by the unlocking motor, and the unlocking motor is connected into a pneumatic braking system or a hydraulic braking system of the tractor of the self-propelled traction type device.
2. The hydraulic motor freewheel unlocking system for a self-propelled traction device as defined in claim 1, characterized in that: and a pneumatic braking system is arranged in the tractor, and the unlocking motor is connected into the pneumatic braking system.
3. The hydraulic motor freewheel unlocking system for a self-propelled traction device as defined in claim 2, characterized in that: the air braking system comprises an air compressor, an oil-water separator, an air dryer and an air storage cylinder which are sequentially communicated through pipelines, and a braking loop communicated with the air storage cylinder; the unlocking motor is communicated with the air cylinder.
4. The hydraulic motor freewheel unlocking system for a self-propelled traction device as defined in claim 1, characterized in that: and a hydraulic oil filter communicated with the oil tank is arranged in the unlocking hydraulic loop.
5. A self-propelled traction device, characterized in that: the self-propelled equipment is provided with a working hydraulic circuit, the working hydraulic circuit comprises more than two hydraulic motors, the power output ends of the more than two hydraulic motors are respectively connected with wheels of the self-propelled equipment, and the self-propelled equipment can be switched between self-propelling driven by the working hydraulic circuit and traction and transportation by the tractor;
the two or more hydraulic motors are respectively provided with 4 oil ports, namely a control oil port, an oil discharge port and two working oil ports;
the self-propelled equipment is internally provided with a hydraulic motor free wheel unlocking system, the hydraulic motor free wheel unlocking system comprises an unlocking motor, an unlocking oil pump, an oil tank and a pipeline, and a control oil port of the hydraulic motor, the unlocking oil pump, the oil tank and an oil unloading port of the hydraulic motor are sequentially communicated through the pipeline to form an unlocking hydraulic loop for unlocking the hydraulic motor into a free wheel working condition;
the unlocking oil pump is driven by the unlocking motor; and a pneumatic braking system or a hydraulic braking system is arranged in the tractor, and the unlocking motor is connected into the pneumatic braking system or the hydraulic braking system.
6. The self-propelled traction device of claim 5, wherein: the working hydraulic circuit comprises a working oil pump, an electromagnetic directional valve, an oil tank and more than two hydraulic motors which are sequentially communicated through pipelines, and the more than two hydraulic motors are respectively connected into the working hydraulic circuit through respective two working oil ports;
the working oil pump is driven by an engine.
7. The self-propelled traction device of claim 5, wherein: the tractor is characterized in that an air pressure braking system is arranged in the tractor, and the air pressure braking system comprises an air compressor, an oil-water separator, an air dryer and an air storage cylinder which are sequentially communicated through pipelines, and a braking loop communicated with the air storage cylinder; the unlocking motor is communicated with the air cylinder.
8. The self-propelled traction device of claim 7, wherein: a pressure regulating valve is arranged on a pipeline for communicating the unlocking motor with the air storage cylinder; and a hydraulic oil filter communicated with the oil tank is arranged in the unlocking hydraulic loop.
9. A self-propelled traction device, characterized in that: the self-propelled equipment is provided with a working hydraulic circuit, the working hydraulic circuit comprises a working oil pump, an electromagnetic directional valve, an oil tank and more than two hydraulic motors which are sequentially communicated through pipelines, the working oil pump is driven by an engine, the power output ends of the more than two hydraulic motors are respectively connected with wheels of the self-propelled equipment, and the self-propelled equipment can be switched between self-driving driven by the working hydraulic circuit and traction and transportation by the tractor;
the hydraulic control system comprises more than two hydraulic motors, a hydraulic control circuit and a hydraulic control circuit, wherein the more than two hydraulic motors are respectively provided with 4 oil ports, namely a control oil port, an oil discharge port and two working oil ports;
more than two hydraulic motor's control hydraulic fluid port inserts through unblock electromagnetic reversing valve work hydraulic circuit, the access point of control hydraulic fluid port is located the intercommunication the working oil pump with on the pipeline of electromagnetic reversing valve, more than two hydraulic motor's control hydraulic fluid port unblock electromagnetic reversing valve the working oil pump the oil tank and more than two hydraulic motor's the hydraulic fluid port that unloads communicates in proper order through still pipeline, constitutes to be used for with hydraulic motor unblock is the unblock hydraulic circuit of free wheel operating mode.
10. The self-propelled traction device of claim 9, wherein: and a hydraulic oil filter communicated with the oil tank is arranged in the unlocking hydraulic loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922305709.3U CN211288288U (en) | 2019-12-20 | 2019-12-20 | Self-propelled traction device and hydraulic motor free wheel unlocking hydraulic system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922305709.3U CN211288288U (en) | 2019-12-20 | 2019-12-20 | Self-propelled traction device and hydraulic motor free wheel unlocking hydraulic system |
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| CN211288288U true CN211288288U (en) | 2020-08-18 |
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| CN201922305709.3U Active CN211288288U (en) | 2019-12-20 | 2019-12-20 | Self-propelled traction device and hydraulic motor free wheel unlocking hydraulic system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115195450A (en) * | 2022-08-09 | 2022-10-18 | 湖北三江航天万山特种车辆有限公司 | Boosting type hydraulic traveling system and tractor |
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2019
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115195450A (en) * | 2022-08-09 | 2022-10-18 | 湖北三江航天万山特种车辆有限公司 | Boosting type hydraulic traveling system and tractor |
| CN115195450B (en) * | 2022-08-09 | 2024-04-16 | 湖北三江航天万山特种车辆有限公司 | Boosting type hydraulic traveling system and tractor |
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