CN113202829A - Motor assembly, traveling drive system and working machine - Google Patents
Motor assembly, traveling drive system and working machine Download PDFInfo
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- CN113202829A CN113202829A CN202110572485.1A CN202110572485A CN113202829A CN 113202829 A CN113202829 A CN 113202829A CN 202110572485 A CN202110572485 A CN 202110572485A CN 113202829 A CN113202829 A CN 113202829A
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- 230000009471 action Effects 0.000 claims abstract description 15
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 305
- 239000010720 hydraulic oil Substances 0.000 description 21
- 230000007246 mechanism Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing
- B60K17/10—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location or kind of gearing of fluid gearing
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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
- F15B11/17—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors using two or more pumps
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
- F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being accumulators
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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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/86—Control during or prevention of abnormal conditions
- F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure
- F15B2211/8633—Pressure source supply failure
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/875—Control measures for coping with failures
- F15B2211/8752—Emergency operation mode, e.g. fail-safe operation mode
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
本发明实施例提供了一种马达总成、行走驱动系统及作业机械。马达总成包括：马达、制动器、制动器控制阀和滑阀组。所述制动器控制阀与所述制动器连接。所述制动器与所述马达连接。所述制动器控制阀能够控制所述制动器解除制动动作或形成制动动作。所述滑阀组连接在所述马达的进油油路和所述马达的回油油路之间，以控制所述马达的进油油路与所述马达的回油油路的连通或者截止。该马达总成能够在作业机械主机出现故障时，通过外接油源使制动器解除制动动作，并使马达的进油油路和回油油路接通，从而使作业机械被拖行至非作业区域内。由此，能够极大降低由于主机故障，作业机械无法被拖行至非作业区域所导致的经济损失。
Embodiments of the present invention provide a motor assembly, a traveling drive system, and a working machine. The motor assembly includes: motor, brake, brake control valve and spool valve group. The brake control valve is connected to the brake. The brake is connected to the motor. The brake control valve can control the brake to release the braking action or form the braking action. The slide valve group is connected between the oil inlet oil circuit of the motor and the oil return oil circuit of the motor to control the communication or cutoff of the oil inlet oil circuit of the motor and the oil return oil circuit of the motor . The motor assembly can release the braking action of the brake through an external oil source when the main engine of the working machine fails, and connect the oil inlet oil circuit and the oil return oil circuit of the motor, so that the working machine can be towed to non-working within the area. In this way, the economic loss caused by the failure of the main engine and the inability of the working machine to be towed to the non-working area can be greatly reduced.
Description
Technical Field
The invention relates to the technical field of hydraulic systems, in particular to a motor assembly, a walking driving system and an operation machine.
Background
The braking measures of the running gear operating on the tunnel or the track bed are all bound with the transmission line. When the host fails and can not move, the traveling device stays in the operation site for a long time and can not move. This results in failure of the next operation and a large economic loss.
Therefore, there is a need for an emergency towing scheme capable of towing the traveling device in case of a host failure.
Disclosure of Invention
The invention provides a motor assembly, a walking driving system and an operating machine, which are used for solving the problem that the operating machine in the prior art cannot move when a main machine fails, and achieving the effect that the operating machine can be dragged to leave an operating site through external oil source supply control under the condition that the main machine fails.
According to a first aspect of the present invention, there is provided a motor assembly comprising: a motor, a brake control valve, and a spool valve set.
Wherein the brake control valve is connected with the brake. The brake is connected with the motor. The brake control valve can control the brake to release the braking action or form the braking action.
The slide valve group is connected between an oil inlet oil way of the motor and an oil return oil way of the motor so as to control the communication or the cut-off of the oil inlet oil way of the motor and the oil return oil way of the motor.
The motor assembly further comprises an oil drainage oil tank and an oil drainage control valve.
The oil leakage control valve is connected between the oil leakage oil tank and an oil leakage port of the motor. The oil leakage control valve can control an oil leakage port of the motor to be communicated with the oil leakage oil tank or communicated with an oil inlet oil way of the motor and an oil return oil way of the motor. And oil supplementing check valves are respectively arranged between the oil leakage control valve and an oil inlet oil way of the motor and between the oil leakage control valve and an oil return oil way of the motor.
According to the motor assembly provided by the invention, the slide valve group comprises a two-position four-way reversing valve and a three-position two-way reversing valve.
And the oil inlet path of the motor and the oil return path of the motor are connected with the two-position four-way reversing valve. And the three-position two-way reversing valve is connected with the two-position four-way reversing valve so as to enable an oil inlet loop of the motor to be communicated with or cut off an oil return path of the motor.
According to the motor assembly provided by the invention, the first working oil port of the two-position four-way reversing valve is connected with the oil inlet oil path of the motor. And a second working oil port of the two-position four-way reversing valve is connected with an oil return path of the motor. And a third working oil port of the two-position four-way reversing valve is connected with a first working oil port of the three-position two-way reversing valve. And a fourth working oil port of the two-position four-way reversing valve is connected with a second working oil port of the three-position two-way reversing valve.
According to the motor assembly provided by the invention, the three-position two-way reversing valve comprises a first pilot control oil path and a second pilot control oil path. And the first pilot control oil way is connected with a third working oil port of the two-position four-way reversing valve. And the second pilot control oil way is connected with a fourth working oil port of the two-position four-way reversing valve.
And two ends of a valve core of the three-position two-way reversing valve are both provided with return springs.
According to a second aspect of the present invention, there is provided a travel drive system comprising a motor assembly as described above.
The walking drive system further comprises an oil source, an energy accumulator control valve and a shuttle valve.
Wherein the oil source is connected with a first oil inlet of the shuttle valve. The oil source is connected with the energy accumulator to charge the energy accumulator with oil. The accumulator control valve is connected between the second oil inlet of the shuttle valve and the accumulator so as to communicate or cut off the accumulator and the shuttle valve. And a working oil port of the shuttle valve is connected with the brake control valve.
The oil source is connected with the oil inlet oil way of the motor and the oil return oil way of the motor. And a pilot control oil way of the slide valve group is connected with a working oil port of the energy accumulator control valve. The slide valve group is connected between an oil inlet oil way of the motor and an oil return oil way of the motor so as to control the communication or the cut-off of the oil inlet oil way of the motor and the oil return oil way of the motor.
According to the walking driving system provided by the invention, the energy accumulator control valve comprises a two-position two-way electromagnetic directional valve and a directional switch. The reversing switch comprises a power supply so that the reversing switch can independently control the two-position two-way electromagnetic reversing valve to reverse.
According to the walking drive system provided by the invention, the oil source comprises a first oil source, a second oil source and a third oil source.
The first oil source is connected with the first oil inlet of the shuttle valve and the energy accumulator respectively. And the second oil source is connected with an oil inlet passage of the motor. And the third oil source is connected with an oil return path of the motor.
According to a third aspect of the invention, there is provided a work machine comprising a motor assembly or a travel drive system as described above.
In the motor assembly provided by the invention, the brake control valve is connected with the brake. The brake is connected with the motor. The brake control valve can control the brake to release the braking action or form the braking action. The slide valve group is connected between an oil inlet oil way of the motor and an oil return oil way of the motor so as to control the communication or the cut-off of the oil inlet oil way of the motor and the oil return oil way of the motor.
When the working machine is out of order, the brake control valve is controlled by using an external oil source to release the brake to the motor. Meanwhile, an external oil source is used for controlling the sliding valve group to act, so that an oil inlet circuit and an oil return circuit of the motor are communicated to form a closed loop, and the working machine can be dragged to a non-working area.
According to the above description, when the main machine of the working machine fails, the motor assembly can release the brake through the external oil source, and connect the oil inlet path and the oil return path of the motor, so that the working machine is dragged to a non-working area. This can greatly reduce the economic loss caused by the work machine not being dragged to the non-work area due to the failure of the main machine.
Further, in the walking drive system provided by the invention, since the walking drive system comprises the motor assembly, the walking drive system also has the advantages as described above.
Further, the present invention provides a working machine, which includes the motor assembly or the travel drive system as described above, and therefore, has the advantages as described above.
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 introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a system schematic of a travel drive system provided by the present invention;
reference numerals:
101: a first oil source; 102: a second oil source;
103: a third oil source; 201: a brake;
202: a brake control valve; 301: a motor;
302: an oil inlet path; 303: an oil return path;
401: an accumulator; 402: an accumulator control valve;
500: a shuttle valve; 601: an oil drainage tank;
602: an oil release control valve; 603: an oil-supplementing one-way valve;
701: a two-position four-way reversing valve; 702: a three-position two-way reversing valve;
800: a one-way valve; 900: a motor assembly.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification to make the purpose, technical solution, and advantages of the embodiments of the present invention more clear, and the technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are a part of embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A motor assembly 900, a travel drive train and a working machine according to an embodiment of the present invention will be described with reference to fig. 1. It should be understood that the following description is only exemplary embodiments of the present invention and does not constitute any particular limitation of the present invention.
An embodiment of an aspect of the present invention provides a motor assembly 900, as shown in fig. 1, the motor assembly 900 including: motor 301, brake 201, brake control valve 202, and a shuttle set.
The brake control valve 202 is connected to the brake 201. The brake 201 is connected to the motor 301. The brake control valve 202 can control the brake 201 to release the braking operation or to form the braking operation.
The slide valve group is connected between an oil inlet path 302 of the motor 301 and an oil return path 303 of the motor 301, so as to control the communication or the cut-off of the oil inlet path 302 of the motor 301 and the oil return path 303 of the motor 301.
When the working machine is at rest, the brake piston in the brake 201 presses the brake pad by the spring force, and the power transmitted from the motor 301 to the reduction gear is thereby braked. At this time, the working machine is in a braking state.
When the main machine of the working machine is in normal operation, hydraulic oil inside the working machine can flow into the brake 201 through the brake control valve 202 to control the brake 201 to perform a braking action or release the braking action.
When the working machine is out of order, the brake control valve 202 may be controlled using an external oil source to release the brake 201 from the braking operation of the motor 301. Meanwhile, an external oil source is used for controlling the action of the slide valve group, so that the oil inlet path 302 and the oil return path 303 of the motor 301 are communicated to form a closed loop, and the working machine can be dragged to a non-working area.
As can be seen from the above description, when the work machine main machine is in a failure, the motor assembly 900 can release the braking operation of the brake 201 by the external oil source, and connect the oil inlet path 302 and the oil return path 303 of the motor 301, so that the work machine is dragged to the non-work area. This can greatly reduce the economic loss caused by the work machine not being dragged to the non-work area due to the failure of the main machine.
In one embodiment of the present invention, the motor assembly 900 further includes a drain tank 601 and a drain control valve 602.
The oil release control valve 602 is connected between the oil release tank 601 and the oil release port of the motor 301. The oil release control valve 602 can control the oil release port of the motor 301 to communicate with the oil release tank 601 or communicate with the oil inlet passage 302 of the motor 301 and the oil return passage 303 of the motor 301. Further, an oil replenishment check valve 603 is installed between the oil release control valve 602 and the oil inlet passage 302 of the motor 301, and between the oil release control valve 602 and the oil return passage 303 of the motor 301.
For example, as shown in FIG. 1, in one embodiment of the present invention, the oil bleed control valve 602 comprises a two-position, three-way directional valve. And a first working oil port of the two-position three-way reversing valve is connected with an oil drainage port of the motor 301. And a second working oil port of the two-position three-way reversing valve is connected with an oil drainage oil tank 601. And a third working oil port of the two-position three-way reversing valve is connected with an oil inlet path 302 and an oil return path 303 of the motor 301. The external oil source can be communicated with a pilot control oil path of the two-position three-way reversing valve. The two-position three-way reversing valve can be switched between an upper position and a lower position under the control action of a pilot control oil way connected with an external oil source.
As shown in FIG. 1, in the initial state, the two-position, three-way directional valve is in the down position. At this time, the work machine main machine operates normally. The oil drain port of the motor 301 is communicated with the oil drain tank 601 through a two-position three-way reversing valve. The hydraulic oil discharged from the motor 301 flows into the drain tank 601.
When the main engine of the operating machine breaks down, the external oil source flows into the pilot control oil path of the two-position three-way reversing valve to drive the two-position three-way reversing valve to be switched to the upper position. At this time, the hydraulic oil discharged from the motor 301 can be supplied to the oil inlet path 302 of the motor 301 through the oil supply check valve 603, so as to prevent the hydraulic oil discharged from the motor 301 from running off.
According to the above-described embodiment, when the working machine main machine is operating normally, the hydraulic oil is continuously supplied to the motor 301 from the oil source of the working machine, and the hydraulic oil discharged from the motor 301 can be discharged into the drain oil tank 601. At this time, the motor 301 and the entire system are not damaged.
When the main machine of the working machine is out of order, there is no external oil source to supply the motor 301 with oil continuously. In this state, when the hydraulic oil discharged from the motor 301 is still discharged to the drain tank 601, the motor 301 and the entire traveling drive system may be damaged by a suction phenomenon occurring when the working machine is dragged.
In this travel drive system, when the main machine of the working machine is out of order, the oil release control valve 602 switches the operation position so that the hydraulic oil released from the motor 301 is supplied to the low-pressure side of the motor 301. Therefore, the loss of hydraulic oil can be effectively prevented, and the phenomenon of suction of the motor 301 and the whole system is avoided.
In one embodiment of the invention, the slide valve set includes a two-position, four-way reversing valve 701 and a three-position, two-way reversing valve 702.
Wherein, the oil inlet path 302 of the motor 301 and the oil return path 303 of the motor 301 are both connected with the two-position four-way reversing valve 701. The three-position two-way reversing valve 702 is connected with the two-position four-way reversing valve 701 so as to enable the oil inlet loop 302 of the motor 301 to be communicated with or cut off from the oil return path 303 of the motor 301.
Further, in an embodiment of the present invention, the first working oil port of the two-position four-way reversing valve 701 is connected to the oil inlet path 302 of the motor 301. The second working oil port of the two-position four-way reversing valve 701 is connected with the oil return path 303 of the motor 301. The third working oil port of the two-position four-way reversing valve 701 is connected with the first working oil port of the three-position two-way reversing valve 702. The fourth working oil port of the two-position four-way reversing valve 701 is connected with the second working oil port of the three-position two-way reversing valve 702.
For example, as shown in fig. 1, in the two-position four-way reversing valve 701, two working oil ports located on the upper side of the two-position four-way reversing valve 701 are a first working oil port and a second working oil port from left to right; the two working oil ports on the lower side of the two-position four-way reversing valve 701 are respectively a third working oil port and a fourth working oil port from left to right.
When the two-position four-way reversing valve 701 is switched to the left position, the first working oil port is communicated with the third working oil port and the oil inlet loop 302 of the motor 301, and the second working oil port is communicated with the fourth working oil port and the oil return path 303 of the motor 301. When the two-position four-way reversing valve 701 is switched to the right position, the first working oil port, the second working oil port, the third working oil port and the fourth working oil port are mutually blocked.
As shown in fig. 1, in the three-position two-way reversing valve 702, two working oil ports located at an upper side of the three-position two-way reversing valve 702 are a first working oil port and a second working oil port, respectively. The first working oil port of the three-position two-way reversing valve 702 is connected with the third working oil port of the two-position four-way reversing valve 701, and the second working oil port of the three-position two-way reversing valve 702 is connected with the fourth working oil port of the two-position four-way reversing valve 701.
When the three-position two-way reversing valve 702 is switched to the left position, a first working oil port and a second working oil port on the three-position two-way reversing valve are communicated with each other; when the three-position two-way reversing valve 702 is switched to the middle position, the first working oil port and the second working oil port on the three-position two-way reversing valve are mutually blocked; when the three-position two-way reversing valve 702 is switched to the right position, the first working oil port and the second working oil port on the three-position two-way reversing valve are communicated with each other. It should be understood herein that the left and right on positions of the three-position, two-way reversing valve 702 are for use in forward and reverse rotation of the motor 301.
In one embodiment of the present invention, the three-position two-way selector valve 702 includes a first pilot oil passage and a second pilot oil passage. The first pilot control oil path is connected with a third working oil port of the two-position four-way reversing valve 701. The second pilot control oil path is connected to a fourth working oil port of the two-position four-way selector valve 701. Two ends of a valve core of the three-position two-way reversing valve 702 are both provided with a return spring.
In combination with the above embodiments, the first pilot oil path of the three-position two-way reversing valve 702 is connected to the third working oil port of the two-position four-way reversing valve 701. The second pilot control oil passage of the three-position two-way reversing valve 702 is connected with the fourth working oil port of the two-position four-way reversing valve 701.
And, a return spring is installed at both ends of the spool of the three-position two-way selector valve 702. The reset spring can generate a certain pretightening force for the valve core. The opening and opening amplitude of the valve element of the three-position two-way reversing valve 702, that is, the displacement of the valve element, depends on the hydraulic pressure in the first pilot control oil path or the second pilot control oil path and the pretightening force of the return spring.
The pressure in the first pilot control oil passage or the second pilot control oil passage can overcome the spring force of the return spring and drive the spool to move after reaching a certain degree. Further, as the pressure in the first pilot oil passage or the second pilot oil passage gradually increases, the diameter of the connection oil passage between the first working port and the second working port of the three-position two-way selector valve 702 gradually increases.
When the diameter of the connecting oil path of the first working oil port and the second working oil port is increased to a certain degree, the pressure acting on the valve core through the first pilot control oil path or the second pilot control oil path is correspondingly reduced. The spool is in a stable position until the hydraulic forces acting on the spool are in a certain equilibrium state.
At this time, the three-position two-way selector valve 702 can generate a constant back pressure on the motor 301. Thus, when the hydraulic oil flows through the inside of the motor 301, an effective lubricating oil film of appropriate strength can be established between the shoes of the motor 301 and the swash plate. Furthermore, when the working machine is towed, the problems of dry grinding and sintering inside the motor 301 can be effectively prevented, the motor 301 is effectively protected, and the service life of the motor 301 is prolonged.
When the main machine of the working machine is in normal operation, the two-position four-way reversing valve 701 and the three-position two-way reversing valve 702 are in the states shown in fig. 1. That is, the two-position, four-way reversing valve 701 is in the right position, and the three-position, two-way reversing valve 702 is in the neutral position.
When the main engine of the working machine fails, the external oil source flows into the pilot control oil path of the two-position four-way reversing valve 701, and drives the two-position four-way reversing valve 701 to switch to the left position.
The hydraulic oil in the third working oil port of the two-position four-way reversing valve 701 flows to the first pilot control oil path of the three-position two-way reversing valve 702, or the hydraulic oil in the fourth working oil port of the two-position four-way reversing valve 701 flows to the second pilot control oil path of the three-position two-way reversing valve 702, so as to drive the three-position two-way reversing valve 702 to be switched to the left position or the right position, and the first working oil port and the second working oil port of the three-position two-way reversing valve 702 are communicated. Thus, the oil-in oil path 302 and the oil-return oil path 303 of the motor 301 communicate with each other and form a closed circuit, and the work machine can be towed into a non-work area.
Meanwhile, the three-position two-way reversing valve 702 can form a certain back pressure, so that an effective oil film with a certain strength is established between the slipper and the swash plate of the motor 301, and the motor 301 is further effectively protected.
Embodiments of the second aspect of the present invention provide a travel drive system including a motor assembly 900 as described above.
Further, since the walking drive system includes the motor assembly 900 as described above, it also has the advantages as described above.
In one embodiment of the present invention, the travel drive system further comprises an oil source, an accumulator 401, an accumulator control valve 402, and a shuttle valve 500.
Wherein, the oil source is connected with the first oil inlet of the shuttle valve 500. The oil source is connected to the accumulator 401 to charge the accumulator 401 with oil. An accumulator control valve 402 is connected between the second oil inlet of the shuttle valve 500 and the accumulator 401 to communicate or block the accumulator 401 with the shuttle valve 500. The working port of the shuttle valve 500 is connected to the brake control valve 202.
The oil source is connected to an oil inlet path 302 of the motor 301 and an oil return path 303 of the motor 301. The pilot control oil path of the spool group is connected to the working oil port of the accumulator control valve 402. The spool group is connected between an oil inlet path 302 of the motor 301 and an oil return path 303 of the motor 301 to control communication or cutoff between the oil inlet path 302 of the motor 301 and the oil return path 303 of the motor 301.
As shown in fig. 1, when the work machine main machine is normally operating, hydraulic oil can flow into the brake 201 through the shuttle valve 500 and the brake control valve 202.
When the main machine of the working machine normally runs, an oil source can enter the brake 201 through the working oil port of the shuttle valve 500 and the brake control valve 202, and hydraulic oil acts on the brake piston in the brake 201, overcomes the pretightening force of the spring, and pushes the brake piston to slide so as to release the braking force. Meanwhile, the oil source can also provide an oil inlet source and an oil return path for the motor 301. The motor 301 operates normally under the driving action of the hydraulic oil to drive the driving shaft to rotate, thereby driving the working machine to run normally.
In addition, during normal running of the working machine, the oil source can also store part of oil into the accumulator 401, so that the oil source can be used as a standby oil source when the working machine main machine fails.
When the main machine of the working machine is in failure, the oil source is in a cut-off state. Part of the hydraulic oil in the accumulator 401 flows into the brake 201 through the accumulator control valve 402, the shuttle valve 500 and the brake control valve 202, and acts on the brake piston in the brake 201, overcomes the pre-tightening force of the spring, and pushes the brake piston to slide, so that the braking force is released. Meanwhile, a part of hydraulic oil in the accumulator 401 flows into the slide valve group through the working oil port of the accumulator control valve 402, so that the oil inlet path 302 and the oil return path 303 of the motor 301 are communicated, and a closed loop is formed. At this time, the work machine may be towed into the non-work area.
Through the structural arrangement, when the main machine of the working machine works normally, the oil source can store oil for the energy accumulator 401. The oil source can provide an oil-in source and an oil-out path for the motor 301. The motor 301 normally operates under the driving action of the hydraulic oil.
When the main machine of the working machine breaks down, the oil source is cut off. At this time, the oil in the accumulator 401 can also flow into the brake control valve 202 and the brake 201 through the accumulator control valve 402 and the shuttle valve 500 to release the brake for the motor 301.
The oil stored in the accumulator 401 flows into the pilot control oil path of the spool valve group through the working oil port of the accumulator control valve 402, so that the spool valve group is reversed to connect the oil inlet path 302 of the motor 301 and the oil return path 303 of the motor 301, thereby forming a closed circuit.
According to the above description, the walking drive system can ensure normal operation running of the working machine; on the other hand, when the main machine fails, the working machine can be dragged into the non-working area. This can greatly reduce the economic loss caused by the work machine not being dragged to the non-work area due to the failure of the main machine.
In one embodiment of the present invention, the accumulator control valve 402 includes a two-position two-way solenoid directional valve and a directional switch. The reversing switch comprises a power supply so that the reversing switch can independently control the two-position two-way electromagnetic reversing valve to reverse.
As shown in fig. 1, the accumulator control valve 402 includes a two-position two-way electromagnetic directional valve and a directional switch for controlling the two-position two-way electromagnetic directional valve to switch the working position. Wherein, a power supply is arranged in the reversing switch. The power source may be a battery. The two-position two-way electromagnetic reversing valve can be controlled to switch the working position as long as the battery in the reversing switch is ensured to be electrified.
When the main machine of the working machine normally operates, the two-position two-way electromagnetic directional valve is in the left position shown in fig. 1, that is, the energy accumulator 401 and the oil inlet of the shuttle valve 500 are in a mutually blocked state. At this time, the accumulator 401 only accumulates energy and does not supply energy.
When the main machine of the operating machine breaks down, the reversing switch is controlled to drive the two-position two-way electromagnetic reversing valve to be switched to the right position, namely, the energy accumulator 401 and the oil inlet of the shuttle valve 500 are mutually communicated. At this time, the first oil source 101 is turned off. The accumulator 401 stops accumulating energy and supplies energy.
In one embodiment of the present invention, the oil sources include a first oil source 101, a second oil source 102, and a third oil source 103.
Wherein, the first oil source 101 is respectively connected with the first oil inlet of the shuttle valve 500 and the accumulator 401. The second oil source 102 is connected to an oil inlet passage 302 of the motor 301. The third oil source 103 is connected to an oil return passage 303 of the motor 301.
It should be understood herein that the first oil source 101, the second oil source 102 and the third oil source 103 may be three independent oil sources respectively, or may be three branches of a common oil source.
As shown in fig. 1, the first oil source 101 is connected to a first oil inlet of the shuttle valve 500 and an accumulator 401, respectively. Thereby, a part of the hydraulic oil of the first oil source 101 can flow into the brake control valve 202 through the shuttle valve 500 and control the brake 201 to perform the braking operation or release the braking operation. Meanwhile, a part of the hydraulic oil of the first oil source 101 may also be stored in the accumulator 401 as a backup oil source.
The second oil source 102 is connected to an oil inlet path 302 of the motor 301, and the third oil source 103 is connected to an oil return path 303 of the motor 301. It should be understood here that the forward rotation or the reverse rotation can be achieved due to the motor 301. The above-described connection of the second oil source 102 to the oil-in oil path 302 of the motor 301 and the connection of the third oil source 103 to the oil-return oil path 303 of the motor 301 are merely one exemplary embodiment of the present invention. And are not intended to limit the invention in any way. The oil inlet path 302 and the oil return path 303 of the motor 301 may be used interchangeably. That is, the oil inlet passage 302 when the motor 301 rotates forward is the oil return passage 303 when the motor 301 rotates backward; the oil return passage 303 when the motor 301 rotates forward is the oil inlet passage 302 when the motor 301 rotates backward.
Further, in one embodiment of the present invention, a check valve 800 for preventing backflow of the oil is provided between the first oil source 101 and the accumulator 401.
As shown in fig. 1, a check valve 800 is installed between the first oil source 101 and the accumulator 401, and the check valve 800 can prevent the hydraulic oil in the accumulator 401 from flowing back into the first oil source 101.
Embodiments of the third aspect of the invention provide a work machine comprising a motor assembly 900 or a travel drive system as described above.
For example, in one embodiment of the present invention, the work machine includes a crawler travel mechanism or a wheel travel mechanism.
It should be understood that the above-mentioned embodiment is only an illustrative embodiment of the present invention, and does not constitute any limitation to the present invention. That is, the work machine includes, but is not limited to, a crawler type traveling mechanism and a wheel type traveling mechanism.
Further, since the work machine includes the motor assembly 900 or the travel drive system as described above, it also has the advantages as described above.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A motor assembly, comprising: a motor, a brake control valve and a slide valve set,
wherein the brake control valve is connected with the brake, the brake is connected with the motor, the brake control valve can control the brake to release the braking action or form the braking action,
the slide valve group is connected between an oil inlet oil way of the motor and an oil return oil way of the motor so as to control the communication or the cut-off of the oil inlet oil way of the motor and the oil return oil way of the motor.
2. The motor assembly of claim 1, further comprising a drain tank and a drain control valve,
the oil leakage control valve is connected between the oil leakage oil tank and an oil leakage port of the motor, can control the oil leakage port of the motor to be communicated with the oil leakage oil tank or the oil inlet oil way of the motor to be communicated with the oil return oil way of the motor, and is provided with oil supplementing check valves between the oil leakage control valve and the oil inlet oil way of the motor and between the oil leakage control valve and the oil return oil way of the motor.
3. The motor assembly of claim 1, wherein the shuttle valve set includes a two-position, four-way reversing valve and a three-position, two-way reversing valve,
the oil inlet circuit of the motor and the oil return circuit of the motor are connected with the two-position four-way reversing valve, and the three-position two-way reversing valve is connected with the two-position four-way reversing valve, so that the oil inlet circuit of the motor is communicated with or cut off from the oil return circuit of the motor.
4. The motor assembly of claim 3, wherein a first working oil port of the two-position four-way reversing valve is connected with an oil inlet path of the motor, a second working oil port of the two-position four-way reversing valve is connected with an oil return path of the motor, a third working oil port of the two-position four-way reversing valve is connected with a first working oil port of the three-position two-way reversing valve, and a fourth working oil port of the two-position four-way reversing valve is connected with a second working oil port of the three-position two-way reversing valve.
5. The motor assembly of claim 4, wherein the three-position two-way selector valve includes a first pilot control oil passage and a second pilot control oil passage, the first pilot control oil passage is connected to a third working oil port of the two-position four-way selector valve, the second pilot control oil passage is connected to a fourth working oil port of the two-position four-way selector valve,
and two ends of a valve core of the three-position two-way reversing valve are both provided with return springs.
6. A travel drive system comprising a motor assembly according to any one of claims 1 to 5.
7. The travel drive system of claim 6, further comprising an oil source, an accumulator control valve, and a shuttle valve,
wherein the oil source is connected with a first oil inlet of the shuttle valve, the oil source is connected with the energy accumulator to charge the energy accumulator, the energy accumulator control valve is connected between a second oil inlet of the shuttle valve and the energy accumulator to communicate or stop the energy accumulator and the shuttle valve, a working oil port of the shuttle valve is connected with the brake control valve,
the oil source is connected with the oil inlet oil way of the motor and the oil return oil way of the motor, the pilot control oil way of the slide valve group is connected with the working oil port of the energy accumulator control valve, and the slide valve group is connected between the oil inlet oil way of the motor and the oil return oil way of the motor so as to control the communication or the stop of the oil inlet oil way of the motor and the oil return oil way of the motor.
8. The travel drive system of claim 7, wherein the accumulator control valve comprises a two-position two-way solenoid directional valve and a directional switch, the directional switch including a power source therein such that the directional switch can independently control the two-position two-way solenoid directional valve to commutate.
9. The travel drive system of claim 7, wherein the oil source comprises a first oil source, a second oil source, and a third oil source,
the first oil source is connected with the first oil inlet of the shuttle valve and the energy accumulator respectively, the second oil source is connected with the oil inlet oil way of the motor, and the third oil source is connected with the oil return oil way of the motor.
10. A work machine comprising a motor assembly according to any one of claims 1 to 5 or a travel drive system according to any one of claims 6 to 9.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110572485.1A CN113202829A (en) | 2021-05-25 | 2021-05-25 | Motor assembly, traveling drive system and working machine |
| PCT/CN2021/109282 WO2022247003A1 (en) | 2021-05-25 | 2021-07-29 | Motor assembly, walking drive system, and work machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110572485.1A CN113202829A (en) | 2021-05-25 | 2021-05-25 | Motor assembly, traveling drive system and working machine |
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| Publication Number | Publication Date |
|---|---|
| CN113202829A true CN113202829A (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110572485.1A Pending CN113202829A (en) | 2021-05-25 | 2021-05-25 | Motor assembly, traveling drive system and working machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN113202829A (en) |
| WO (1) | WO2022247003A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118375652A (en) * | 2024-05-28 | 2024-07-23 | 无锡市鑫垚传动机械制造有限公司 | Hydraulic cylinder retarding protection device |
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| SE353297B (en) * | 1971-01-28 | 1973-01-29 | Haegglund & Soener Ab | |
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| CN207846525U (en) * | 2017-12-18 | 2018-09-11 | 徐州徐工挖掘机械有限公司 | The delay braking control loop of excavator rotary motor |
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| JPH01255702A (en) * | 1988-04-01 | 1989-10-12 | Hitachi Constr Mach Co Ltd | Hydraulic motor brake circuit |
| JP2003130011A (en) * | 2001-10-19 | 2003-05-08 | Hitachi Constr Mach Co Ltd | Driving device of hydraulically operated motor |
| JP2006112575A (en) * | 2004-10-18 | 2006-04-27 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Hydraulic circuit for travelling of construction machine |
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| Publication number | Publication date |
|---|---|
| WO2022247003A1 (en) | 2022-12-01 |
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