CN118953203A - Cargo box overturning device, cargo box overturning control method and articulated dump truck - Google Patents
Cargo box overturning device, cargo box overturning control method and articulated dump truck Download PDFInfo
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- CN118953203A CN118953203A CN202411441954.6A CN202411441954A CN118953203A CN 118953203 A CN118953203 A CN 118953203A CN 202411441954 A CN202411441954 A CN 202411441954A CN 118953203 A CN118953203 A CN 118953203A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/04—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element
- B60P1/16—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element actuated by fluid-operated mechanisms
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60P—VEHICLES ADAPTED FOR LOAD TRANSPORTATION OR TO TRANSPORT, TO CARRY, OR TO COMPRISE SPECIAL LOADS OR OBJECTS
- B60P1/00—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading
- B60P1/04—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element
- B60P1/16—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element actuated by fluid-operated mechanisms
- B60P1/162—Vehicles predominantly for transporting loads and modified to facilitate loading, consolidating the load, or unloading with a tipping movement of load-transporting element actuated by fluid-operated mechanisms the hydraulic system itself
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
本发明属于铰接式自卸车技术领域，公开了货箱翻转装置、货箱翻转控制方法及铰接式自卸车，压力油源的输出端连接供油管路；油箱连接回油管路；举升油缸具有用于带动货箱运动的活塞杆，活塞杆将举升油缸的内腔分隔为无杆腔和有杆腔；多路阀能够沿设定方向运动而具有上升位置以及下降位置，上升位置设置有换向阀，当多路阀位于上升位置时，供油管路连接无杆腔，且供油管路连接换向阀的第一控制端，换向阀用于使回油管路与有杆腔连接或断开连接，当回油管路与有杆腔连接时，能够使举升油缸的活塞杆伸出，当回油管路与有杆腔断开连接时，可阻止货箱继续翻转，避免出现拔缸现象，当多路阀位于下降位置时，举升油缸能够带动货箱相对于车架下降。
The invention belongs to the technical field of articulated dump trucks and discloses a cargo box flipping device, a cargo box flipping control method and an articulated dump truck. The output end of a pressure oil source is connected to an oil supply pipeline; the oil tank is connected to an oil return pipeline; a lifting oil cylinder has a piston rod for driving the cargo box to move, and the piston rod divides the inner cavity of the lifting oil cylinder into a rodless cavity and a rod cavity; a multi-way valve can move along a set direction and has an ascending position and a descending position, and a reversing valve is provided at the ascending position. When the multi-way valve is in the ascending position, the oil supply pipeline is connected to the rodless cavity, and the oil supply pipeline is connected to a first control end of the reversing valve. The reversing valve is used to connect or disconnect the return oil pipeline with the rod cavity. When the return oil pipeline is connected to the rod cavity, the piston rod of the lifting oil cylinder can be extended. When the return oil pipeline is disconnected from the rod cavity, the cargo box can be prevented from continuing to flip, thereby avoiding the cylinder pulling phenomenon. When the multi-way valve is in the descending position, the lifting oil cylinder can drive the cargo box to descend relative to the vehicle frame.
Description
Technical Field
The invention relates to the technical field of articulated dumpers, in particular to a container overturning device, a container overturning control method and an articulated dumper.
Background
In the hinged dumper, a container is generally hinged to the rear end of a frame, and oil is controlled to enter and exit a rodless cavity or a rod cavity of a lifting oil cylinder through a pressure oil source and a reversing valve so as to drive the container to turn over relative to the frame through movement of the lifting oil cylinder. In order to promote the speed of unloading of articulated dumper, the packing box needs to overturn great angle for the frame, and at this moment, if the angle of packing box upset is too big, along the fore-and-aft direction of frame, can lead to the focus of packing box to cross the pin joint between packing box and the frame, and the packing box can overturn downwards towards the rear fast this moment, and then leads to lifting cylinder's piston rod and cylinder cap to deviate from lifting cylinder, appears pulling out the jar phenomenon.
Disclosure of Invention
According to one aspect of the invention, the invention provides a container overturning device, which solves the problem that in the prior art, a cylinder pulling phenomenon can occur if the container is overturned at an excessive angle.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the container overturning device is arranged on the frame and is used for driving the container to overturn relative to the frame;
The cargo box turning device includes:
the output end of the pressure oil source is connected with an oil supply pipeline;
The oil tank is connected with an oil return pipeline;
The lifting oil cylinder is provided with a piston rod for driving the container to move, and the piston rod divides the inner cavity of the lifting oil cylinder into a rodless cavity and a rod cavity;
The multi-way valve can move along a set direction and has an ascending position and a descending position, the ascending position is provided with a reversing valve, when the multi-way valve is positioned at the ascending position, the oil supply pipeline is connected with the rodless cavity, the oil supply pipeline is connected with a first control end of the reversing valve, and the reversing valve is used for connecting or disconnecting the oil return pipeline with the rod cavity; when the multi-way valve is positioned at the descending position, the oil supply pipeline is connected with the rod cavity, and the oil return pipeline is connected with the rodless cavity.
As a preferred scheme of the container turning device, the reversing valve is provided with a connecting position and a non-connecting position, when the reversing valve is positioned at the connecting position, the oil return pipeline is connected with the rod cavity, and when the reversing valve is positioned at the non-connecting position, the oil return pipeline is disconnected with the rod cavity; the oil in the oil supply pipeline is used for driving the reversing valve to move towards the connecting position, the second control end of the reversing valve is connected with an elastic piece, and the elastic piece is used for providing elastic force for enabling the reversing valve to move towards the non-connecting position.
As a preferred embodiment of the container turning device, the multiplex valve is further movable in a set direction to have a stop position, and when the multiplex valve is in the stop position, the oil supply line is disconnected from both the rodless chamber and the rod-containing chamber, and the oil return line is disconnected from both the rodless chamber and the rod-containing chamber.
As a preferred embodiment of the container turning device, the multiple-way valve is further capable of moving in a set direction to have a floating position, and when the multiple-way valve is located at the floating position, the oil supply pipeline is connected with the rod cavity through a connecting pipeline, the oil return pipeline is connected with the rodless cavity through a floating pipeline, and the cross-sectional area of the floating pipeline is smaller than that of the connecting pipeline.
The cargo box turning device further comprises a pilot oil source and a pilot valve connected with the pilot oil source, wherein the pilot valve is used for enabling the control end of the multi-way valve to be connected with or disconnected from the pilot oil source, and when the control end of the multi-way valve is connected with the pilot oil source, the pilot oil source is used for driving the multi-way valve to move along a set direction.
According to another aspect of the present invention, there is provided a cargo box turning control method implemented by the above cargo box turning device, the cargo box turning control method including a cargo box ascent control method including:
s100: acquiring a longitudinal inclination angle of the frame along the front-rear direction of the vehicle body and a transverse inclination angle of the frame along the left-right direction of the vehicle body;
s110: comparing the longitudinal inclination angle with a first set angle, and comparing the transverse inclination angle with a second set angle;
If the longitudinal inclination angle is not smaller than the first set angle or the transverse inclination angle is not smaller than the second set angle, step S120 is performed;
S120: preventing the multiway valve from moving toward the raised position.
As a preferable mode of the cargo box overturning control method, in step S110, if the longitudinal inclination angle is smaller than the first set angle or the transverse inclination angle is smaller than the second set angle, step S130 is executed;
s130: confirming that the multiway valve is located at a rising position;
s140: acquiring a container critical angle according to the longitudinal inclination angle and the transverse inclination angle;
s150: acquiring an overturning angle of the container relative to the frame;
S160: comparing the turning angle with the critical angle of the container;
If the overturning angle is not smaller than the container critical angle, executing step S170;
s170: and sending out warning information.
As a preferable mode of the container turning control method, in step S160, if the turning angle is smaller than the container critical angle, the process returns to step S150.
As a preferable mode of the container overturning control method, the multi-way valve can also move along a set direction to have a floating position, when the multi-way valve is positioned at the floating position, the oil supply pipeline is connected with the rod cavity through a connecting pipeline, the oil return pipeline is connected with the rodless cavity through a floating pipeline, and the cross section area of the floating pipeline is smaller than that of the connecting pipeline;
the container overturning control method further comprises a container descending control method, and the container descending control method comprises the following steps:
S200: confirming that the multi-way valve is positioned at a descending position;
s210: acquiring an overturning angle of the container relative to the frame;
S220: comparing the turning angle with the floating critical angle;
if the flip angle is not greater than the floating critical angle, executing step S230;
S230: and controlling the multiway valve to move to a floating position.
According to still another aspect of the present invention, there is provided an articulated dump truck, including the above-mentioned cargo box turning device, further including a truck frame and a cargo box articulated to the truck frame, wherein the cargo box turning device is disposed on the truck frame and is used for driving the cargo box to turn over relative to the truck frame.
The beneficial effects of the invention are as follows:
The invention provides a container overturning device which is arranged on a frame and is used for driving a container to overturn relative to the frame. The container overturning device comprises a pressure oil source, an oil tank, a lifting oil cylinder and a multi-way valve, wherein the output end of the pressure oil source is connected with an oil supply pipeline; the oil tank is connected with an oil return pipeline; the lifting oil cylinder is provided with a piston rod for driving the container to move, and the piston rod divides the inner cavity of the lifting oil cylinder into a rodless cavity and a rod cavity; the multi-way valve can move along the set direction and has an ascending position and a descending position, the ascending position is provided with a reversing valve, when the multi-way valve is positioned at the ascending position, the oil supply pipeline is connected with the rodless cavity, the oil supply pipeline is connected with a first control end of the reversing valve, the reversing valve is used for connecting or disconnecting the oil return pipeline with the rod cavity, when the oil return pipeline is connected with the rod cavity, the oil supply pipeline can inject oil into the rodless cavity, and the oil in the rod cavity can flow into the oil tank through the oil return pipeline, so that a piston rod of the lifting oil cylinder stretches out to drive the container to ascend relative to the frame; when the oil return pipeline is disconnected with the rod cavity, oil in the rod cavity cannot flow into the oil tank through the oil return pipeline, and at the moment, if the overturning angle of the container is overlarge, as part of oil still exists in the rod cavity, the container cannot be overturned continuously, so that the angle of the container relative to the frame can be kept unchanged. When the multi-way valve is positioned at the descending position, the oil supply pipeline is connected with the rod cavity, the oil return pipeline is connected with the rodless cavity, so that the oil supply pipeline can inject oil into the rod cavity, and the oil in the rodless cavity can flow into the oil tank through the oil return pipeline, so that a piston rod of the lifting oil cylinder is retracted to drive the container to descend relative to the frame. In the container overturning device, when the overturning angle of the container relative to the frame is overlarge, the connection between the oil return pipeline and the rod cavity is cut off through the reversing valve, so that the container is prevented from overturning continuously, and the phenomenon of pulling out the cylinder is avoided.
The invention also provides a container overturning control method, which is implemented by the container overturning device and comprises a container ascending control method, wherein in the container ascending control method, the longitudinal inclination angle of the frame along the front-back direction of the vehicle body and the transverse inclination angle along the left-right direction of the vehicle body are obtained; comparing the longitudinal inclination angle with the first set angle, and comparing the transverse inclination angle with the second set angle; if the longitudinal inclination angle is not smaller than the first set angle or the transverse inclination angle is not smaller than the second set angle, the frame is seriously inclined along the transverse direction or the longitudinal direction, and if the container is overturned, the hinged dumper is most likely to be overturned or the container is inclined backwards, so that the multiway valve is prevented from moving towards the ascending position, and the container is prevented from overturning relative to the frame.
The invention also provides a hinged dumper, which comprises the container overturning device, a frame and a container hinged to the frame, wherein the container overturning device is arranged on the frame and is used for driving the container to overturn relative to the frame. In the container overturning device, when the overturning angle of the container relative to the frame is overlarge, the connection between the oil return pipeline and the rod cavity is cut off through the reversing valve, so that the container is prevented from overturning continuously, and the phenomenon of pulling out the cylinder is avoided.
Drawings
FIG. 1 is a schematic view of a cargo box tipping device in accordance with an embodiment of the invention;
FIG. 2 is a schematic illustration of the structure of a frame and cargo box of an embodiment of the present invention;
FIG. 3 is a schematic diagram of a reversing valve in an embodiment of the invention;
FIG. 4 is a flow chart of a method of controlling the ascent of a cargo box in accordance with an embodiment of the present invention;
fig. 5 is a flow chart of a method of controlling descent of a cargo box in an embodiment of the invention.
In the figure:
100. a frame; 200. a cargo box;
1. A source of pressurized oil; 11. an oil supply line;
2. An oil tank; 21. an oil return pipeline;
3. lifting the oil cylinder; 31. a rodless cavity; 32. a rod cavity is arranged;
4. a multiway valve; 41. a return spring; 401. a pressure oil port; 402. a first port; 403. a second port;
5. a reversing valve; 51. an elastic member; 501. a first chamber; 502. a second chamber;
6. a pilot oil source;
7. A pilot valve;
81. a biaxial angle sensor; 82. a container angle sensor; 83. and displaying the instrument.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
Example 1
In the hinged dumper, a container is generally hinged to the rear end of a frame, and oil is controlled to enter and exit a rodless cavity or a rod cavity of a lifting oil cylinder through a pressure oil source and a reversing valve so as to drive the container to turn over relative to the frame through movement of the lifting oil cylinder. In order to promote the speed of unloading of articulated dumper, the packing box needs to overturn great angle for the frame, and at this moment, if the angle of packing box upset is too big, along the fore-and-aft direction of frame, can lead to the focus of packing box to cross the pin joint between packing box and the frame, and the packing box can overturn downwards towards the rear fast this moment, and then leads to lifting cylinder's piston rod and cylinder cap to deviate from lifting cylinder, appears pulling out the jar phenomenon.
To the above-mentioned problem, this embodiment provides packing box turning device to solve among the prior art if the too big problem that can appear the jar phenomenon of pulling out of angle of packing box upset, can be used to articulated tipper technical field.
Referring to fig. 1-2, the cargo box tilting device is disposed on the frame and is used to turn the cargo box 200 relative to the frame 100. The container turning device comprises a pressure oil source 1, an oil tank 2, a lifting oil cylinder 3 and a multi-way valve 4, wherein the output end of the pressure oil source 1 is connected with an oil supply pipeline 11, in the embodiment, the pressure oil source 1 is an oil supply pump, the input end of the oil supply pump is connected with the oil tank 2, and the oil tank 2 is connected with an oil return pipeline 21. The lifting cylinder 3 is provided with a piston rod for driving the cargo box 200 to move, and the piston rod divides the inner cavity of the lifting cylinder 3 into a rodless cavity 31 and a rod cavity 32; the multi-way valve 4 can move along a set direction and has an ascending position and a descending position, the ascending position is provided with a reversing valve, 5 when the multi-way valve 4 is positioned at the ascending position, the oil supply pipeline 11 is connected with the rodless cavity 31, the oil supply pipeline 11 is connected with a first control end of the reversing valve 5, the reversing valve 5 is used for connecting or disconnecting the oil return pipeline 21 with the rod cavity 32, when the oil return pipeline 21 is connected with the rod cavity 32, the oil supply pipeline 11 can inject oil into the rodless cavity 31, the oil in the rod cavity 32 can flow into the oil tank 2 through the oil return pipeline 21, so that a piston rod of the lifting oil cylinder 3 stretches out to drive the lifting frame 100 to ascend relative to the frame 200; when the oil return pipeline 21 is disconnected from the rod cavity 32, oil in the rod cavity 32 cannot flow into the oil tank 2 through the oil return pipeline 21, and at this time, if the overturning angle of the cargo box 200 is too large, as a part of oil still exists in the rod cavity 32, the cargo box 200 cannot continue overturning, so that the angle of the cargo box 200 relative to the vehicle frame 100 can be kept unchanged. When the multi-way valve 4 is located at the descending position, the oil supply pipeline 11 is connected with the rod cavity 32, the oil return pipeline 21 is connected with the rodless cavity 31, so that the oil supply pipeline 11 can inject oil into the rod cavity 32, and the oil in the rodless cavity 31 can flow into the oil tank 2 through the oil return pipeline 21, so that a piston rod of the lifting oil cylinder 3 is retracted to drive the container 200 to descend relative to the frame 100. In the container turning device, when the turning angle of the container 200 relative to the frame 100 is too large, the connection between the oil return pipeline 21 and the rod cavity 32 can be cut off through the reversing valve 5, so that the container 200 is prevented from continuing to turn over, and the phenomenon of pulling out a cylinder is avoided.
With continued reference to fig. 1-2, the reversing valve 5 has a connected position and a disconnected position, the return line 21 being connected to the rod chamber 32 when the reversing valve 5 is in the connected position, and the return line 21 being disconnected from the rod chamber 32 when the reversing valve 5 is in the disconnected position; the oil in the oil supply pipeline 11 is used for driving the reversing valve 5 to move towards the connecting position, the second control end of the reversing valve 5 is connected with the elastic piece 51, the elastic piece 51 is used for providing elastic force for enabling the reversing valve 5 to move towards the non-connecting position, and therefore the position of the reversing valve 5 can be controlled through the oil pressure in the oil supply pipeline 11 and the elastic force of the elastic piece 51, specifically, the oil return pipeline 21 is communicated with or disconnected from the rod cavity 32 based on the oil pressure of the oil supply pipeline 11 and the acting force of the elastic piece 51, when the multi-way valve 4 just moves to the ascending position, the oil pressure in the oil supply pipeline 11 is high, the reversing valve 5 moves towards the connecting position under the pushing of the oil, at the moment, the oil supply pipeline 11 can inject the oil into the rodless cavity 31, the oil in the rod cavity 32 can flow into the oil tank 2 through the oil return pipeline 21, and accordingly the piston rod of the lifting oil cylinder 3 stretches out to drive the cargo box 200 to ascend relative to the frame 100. With the continuous overturning of the cargo box 200, when the gravity center of the cargo box 200 is overlapped with the hinge point of the cargo box 200 and the frame 100 along the front-rear direction of the vehicle body, the oil pressure in the oil supply pipeline 11 reaches the maximum, at this time, if the cargo box 200 is continuously overturned, the oil pressure in the oil supply pipeline 11 can be reduced rapidly, when the oil pressure in the oil supply pipeline 11 is smaller than the elastic force of the elastic piece 51, the elastic piece 51 drives the reversing valve 5 to move towards the non-connection position, and at this time, the reversing valve 5 cuts off the connection between the oil return pipeline 21 and the rod cavity 32, thereby preventing the cargo box 200 from continuously overturning and avoiding the phenomenon of pulling out cylinders. By connecting the oil supply line 11 to the reversing valve 5 and providing the elastic member 51, the turning of the cargo box 200 can be automatically prevented after the center of gravity of the cargo box 200 has passed over the hinge point.
Optionally, the reversing valve 5 is disposed inside the multiway valve 4, so as to save space and facilitate arrangement of hydraulic pipelines. In this embodiment, as shown in fig. 3, the specific structures of the multiplex valve 4 and the reversing valve 5 are that the reversing valve 5 is disposed inside the multiplex valve 4 and forms a first chamber 501 and a second chamber 502, and that the multiplex valve 4 has a pressure oil port 401 communicating with the inner chamber of the oil supply line 11, a first port 402 communicating with the inner chamber of the oil return line 21, and a second port 403 communicating with the rod chamber 32. The oil in the oil supply pipeline 11 can enter the first cavity 501 through the pressure oil port 401, the first cavity 501 is spiral, and the oil entering the first cavity 501 can push the reversing valve 5 to move towards the direction of the compression elastic piece 51, so that the second cavity 502 is simultaneously communicated with the first port 402 and the second port 403, and the oil return pipeline 21 is connected with the rod cavity 32.
With continued reference to fig. 1-2, the multiplex valve 4 is also capable of moving in a set direction to have a stop position, and when the multiplex valve 4 is in the stop position, the oil supply line 11 is disconnected from both the rodless chamber 31 and the rod chamber 32, and the oil return line 21 is disconnected from both the rodless chamber 31 and the rod chamber 32, so that the turning angle of the cargo box 200 relative to the frame 100 is maintained, and the cargo box 200 can be switched to the stop position at any time during the ascent or descent of the cargo box 200 to maintain the current turning angle of the cargo box 200. Optionally, two return springs 41 are respectively connected to two ends of the multi-way valve 4, and the two return springs 41 are used for providing an elastic force for moving the multi-way valve 4 towards the stop position, so that the multi-way valve 4 is always at the stop position under the control of no external force.
With continued reference to fig. 1-2, the multiplex valve 4 is further capable of moving in a set direction to have a floating position, when the multiplex valve 4 is in the floating position, the oil supply pipeline 11 is connected to the rod cavity 32 through the connecting pipeline, the oil return pipeline 21 is connected to the rodless cavity 31 through the floating pipeline, the cross-sectional area of the floating pipeline is smaller than that of the connecting pipeline, so that the oil flow rate in the floating pipeline is smaller than that in the connecting pipeline, the speed of the oil flowing to the oil return pipeline 21 in the rodless cavity 31 is slower than that of the oil flowing to the rod cavity 32 in the oil supply pipeline 11, so that the oil in the rodless cavity 31 flows out slowly, the retraction speed of the lifting oil cylinder 3 can be reduced, the descending speed of the cargo box 200 can be further reduced, and the multiplex valve can be controlled to move to the floating position when the cargo box 200 is about to be in contact with the frame 100, so as to prevent the collision between the cargo box 200 and the frame 100, and damage to the frame 100 or the cargo box 200.
With continued reference to fig. 1-2, the cargo box turning device further includes a pilot oil source 6 and a pilot valve 7 connected to the pilot oil source 6, the pilot valve 7 being configured to connect or disconnect a control end of the multi-way valve 4 to the pilot oil source 6, and the pilot oil source 6 being configured to drive the multi-way valve 4 to move in a set direction when the control end of the multi-way valve 4 is connected to the pilot oil source 6. In this embodiment, the multiple-way valve 4 can move along the first direction to pass through the ascending position, the stopping position, the descending position and the floating position in sequence, the oil in the pipeline on the first side of the multiple-way valve 4 is used for driving the multiple-way valve 4 to move towards the floating position along the first direction, the oil in the pipeline on the second side of the multiple-way valve 4 is used for driving the multiple-way valve 4 to move towards the ascending position along the opposite direction of the first direction, and correspondingly, two pilot valves 7 are arranged, one pilot valve 7 is used for controlling the connection or disconnection between the pipeline on the first side of the multiple-way valve 4 and the pilot oil source 6, and the other pilot valve 7 is used for controlling the connection or disconnection between the pipeline on the second side of the multiple-way valve 4 and the pilot oil source 6.
Example two
The present embodiment provides a cargo box overturning control method implemented by the cargo box overturning device in the first embodiment, where the cargo box overturning control method includes a cargo box lifting control method, and the cargo box lifting control method includes the following steps.
S100: a longitudinal inclination angle of the vehicle frame 100 in the front-rear direction of the vehicle body and a lateral inclination angle in the left-right direction of the vehicle body are obtained.
Specifically, it can be obtained by the biaxial angle sensor 81 provided to the vehicle frame 100, and the biaxial angle sensor 81 can detect the longitudinal inclination angle of the vehicle frame 100 in the vehicle body front-rear direction and the lateral inclination angle in the vehicle body left-right direction at the same time.
S110: comparing the longitudinal inclination angle with the first set angle, and comparing the transverse inclination angle with the second set angle.
If the longitudinal inclination angle is not smaller than the first set angle, or if the lateral inclination angle is not smaller than the second set angle, it indicates that the vehicle frame 100 is severely inclined in the lateral or longitudinal direction at this time, and if the container 200 is turned over, the hinged dumper is most likely to be turned over or the container is inclined backward, so that step S120 is performed.
The first set angle and the second set angle can be obtained through a large number of experiments or simulation calculation in the earlier stage.
S120: preventing the multiplex valve 4 from moving towards the raised position.
By preventing the multiplex valve 4 from moving toward the raised position, the cargo box 200 can be prevented from tipping relative to the frame 100. Specifically, the pilot oil source 6 is controlled to stop supplying oil, so that the multi-way valve 4 is always positioned at the stop position under the action of the return spring 41. In addition, the hydraulic control device can also be realized by controlling the pilot valve 7 positioned on the second side of the multi-way valve 4, and the pilot valve 7 positioned on the second side of the multi-way valve 4 keeps the pipeline positioned on the second side of the multi-way valve 4 and the pilot oil source 6 in a disconnected state all the time, so that the hydraulic control device prevents the hydraulic control device from driving the multi-way valve 4 to move towards the ascending position along the reverse direction of the first direction.
Optionally, in step S110, if the longitudinal inclination angle is smaller than the first setting angle and the lateral inclination angle is smaller than the second setting angle, this indicates that the inclination of the frame 100 in the lateral direction and the longitudinal direction is slight, and the cargo box 200 can be controlled to rise for unloading, so as to execute step S130.
S130: confirm that the multiplex valve 4 is in the raised position.
The position of the multiway valve 4 can be obtained by a position sensor and other devices.
S140: and acquiring the critical angle of the container according to the longitudinal inclination angle and the transverse inclination angle.
It will be appreciated that differing longitudinal or transverse angles of the frame 100 will result in differing critical angles for the cargo box 200 when it is about to be tipped over, and thus it is desirable to obtain the critical angle for the cargo box based on the current longitudinal and transverse angles of the frame 100 at that time.
Specifically, the container critical angle may be obtained by the longitudinal inclination angle and the lateral inclination angle based on the maps of the longitudinal inclination angle, the lateral inclination angle, and the container critical angle, which may be obtained through a large number of experiments in the early stage and stored in the controller.
S150: the flip angle of the cargo box 200 relative to the frame 100 is obtained.
Specifically, the acquisition is performed by the cargo box angle sensor 82 provided to the cargo box 200.
S160: comparing the turning angle with the critical angle of the container.
If the turning angle is not smaller than the critical angle of the cargo box, it indicates that the cargo box 200 is about to be turned at this time, and although the lift cylinder 3 does not have a phenomenon of pulling out the cylinder due to the presence of the reversing valve 5 at this time, it is still necessary to remind the driver of careful operation, so that step S170 is performed.
S170: and sending out warning information.
The warning information can be sound and light information. In this embodiment, a display instrument 83 is further disposed in the cab of the articulated dump truck, and the warning information is displayed by the display instrument 83.
Optionally, in step S160, if the turning angle is smaller than the container critical angle, the process returns to step S150, i.e. the turning angle of the container 200 relative to the frame 100 is retrieved.
The container overturning control method also comprises a container descending control method, and the container descending control method comprises the following steps.
S200: confirm that the multiplex valve 4 is in the lowered position.
S210: the flip angle of the cargo box 200 relative to the frame 100 is obtained.
S220: comparing the turning angle with the floating critical angle.
The float threshold angle is typically a small value and when the flip angle is equal to the float threshold angle, this indicates that the flip angle of the cargo box 200 relative to the frame 100 is small and the cargo box 200 will contact the frame 100.
If the flip angle is not greater than the floating threshold angle, it indicates that the cargo box 200 will contact the frame 100 at this time, and thus step S230 is performed.
S230: the multiplex valve 4 is controlled to move to a floating position.
This controls the container 200 to descend slowly to avoid collisions between the container 200 and the frame 100.
Optionally, in step S220, if the flip angle is greater than the floating critical angle, it indicates that the cargo box 200 is still far from the frame 100, and step S210 is returned to retrieve the flip angle of the cargo box 200 relative to the frame 100.
In the cargo box overturning control method provided by the embodiment, the multiway valve 4 can be controlled to move to the stop position at any time in the ascending or descending process of the cargo box 200, so that the angle of the cargo box 200 relative to the frame 100 is kept unchanged.
In addition, when the articulated dump truck is parked for maintenance, the multiway valve 4 can be always controlled to move to the descending position or the floating position, so that the container 200 always has a force for moving towards the approaching frame 100, thereby ensuring the safety during maintenance.
Example III
The embodiment provides an articulated dump truck, which comprises the container turning device in the first embodiment, and further comprises a frame 100 and a container 200 hinged to the frame 100, wherein the container turning device is arranged on the frame 100 and is used for driving the container 200to turn over relative to the frame 100. In the container turning device, when the turning angle of the container 200 relative to the frame 100 is too large, the connection between the oil return pipeline 21 and the rod cavity 32 can be cut off through the reversing valve 5, so that the container 200 is prevented from continuing to turn over, and the phenomenon of pulling out a cylinder is avoided.
It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the invention. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (10)
1. The container overturning device is arranged on the frame (100) and is used for driving the container (200) to overturn relative to the frame (100);
the packing box turning device is characterized by comprising:
The output end of the pressure oil source (1) is connected with an oil supply pipeline (11);
the oil tank (2) is connected with the oil return pipeline (21);
The lifting oil cylinder (3) is provided with a piston rod for driving the container (200) to move, and the piston rod divides the inner cavity of the lifting oil cylinder (3) into a rodless cavity (31) and a rod cavity (32);
A multi-way valve (4) capable of moving along a set direction and having a rising position and a falling position, wherein the rising position is provided with a reversing valve (5), when the multi-way valve (4) is positioned at the rising position, the oil supply pipeline (11) is connected with the rodless cavity (31), the oil supply pipeline (11) is connected with a first control end of the reversing valve (5), and the reversing valve (5) is used for connecting or disconnecting the oil return pipeline (21) with the rod cavity (32); when the multi-way valve (4) is positioned at the descending position, the oil supply pipeline (11) is connected with the rod cavity (32), and the oil return pipeline (21) is connected with the rodless cavity (31).
2. A container tipping arrangement according to claim 1, characterized in that the reversing valve (5) has a connected position and a disconnected position, the return line (21) being connected to the rod chamber (32) when the reversing valve (5) is in the connected position, the return line (21) being disconnected from the rod chamber (32) when the reversing valve (5) is in the disconnected position; the oil in the oil supply pipeline (11) is used for driving the reversing valve (5) to move towards the connecting position, the second control end of the reversing valve (5) is connected with an elastic piece (51), and the elastic piece (51) is used for providing elastic force for enabling the reversing valve (5) to move towards the non-connecting position.
3. The container turning device according to claim 1, characterized in that the multiplex valve (4) is also movable in a set direction with a stop position, the oil supply line (11) being disconnected from both the rodless chamber (31) and the rod-containing chamber (32) when the multiplex valve (4) is in the stop position, the oil return line (21) being disconnected from both the rodless chamber (31) and the rod-containing chamber (32).
4. A container turning device according to claim 1, characterized in that the multiplex valve (4) is also movable in a set direction to have a floating position, the oil supply line (11) being connected to the rod-like chamber (32) via a connecting line and the oil return line (21) being connected to the rodless chamber (31) via a floating line, the cross-sectional area of the floating line being smaller than the cross-sectional area of the connecting line when the multiplex valve (4) is in the floating position.
5. The cargo box tilting device according to any one of claims 1-4, further comprising a pilot oil source (6) and a pilot valve (7) connected to the pilot oil source (6), the pilot valve (7) being adapted to connect or disconnect a control end of the multiplex valve (4) to the pilot oil source (6), the pilot oil source (6) being adapted to drive the multiplex valve (4) in a set direction when the control end of the multiplex valve (4) is connected to the pilot oil source (6).
6. A container turning control method implemented by the container turning device according to any one of claims 1 to 5, the container turning control method including a container ascent control method including:
s100: acquiring a longitudinal inclination angle of the frame (100) along the front-rear direction of the vehicle body and a transverse inclination angle of the frame along the left-right direction of the vehicle body;
s110: comparing the longitudinal inclination angle with a first set angle, and comparing the transverse inclination angle with a second set angle;
If the longitudinal inclination angle is not smaller than the first set angle or the transverse inclination angle is not smaller than the second set angle, step S120 is performed;
s120: preventing the multiway valve (4) from moving towards the raised position.
7. The method according to claim 6, wherein in step S110, if the longitudinal inclination angle is smaller than the first set angle or the lateral inclination angle is smaller than the second set angle, step S130 is performed;
S130: confirming that the multiplex valve (4) is in the raised position;
s140: acquiring a container critical angle according to the longitudinal inclination angle and the transverse inclination angle;
s150: acquiring a turnover angle of the container (200) relative to the frame (100);
S160: comparing the turning angle with the critical angle of the container;
If the overturning angle is not smaller than the container critical angle, executing step S170;
s170: and sending out warning information.
8. The method of claim 7, wherein in step S160, if the turning angle is smaller than the critical container angle, the process returns to step S150.
9. The cargo box rollover control method according to any one of claims 6-8, wherein the multiplex valve (4) is further capable of moving in a set direction to have a floating position, wherein the oil supply line (11) is connected to the rod-like chamber (32) via a connecting line, and wherein the oil return line (21) is connected to the rodless chamber (31) via a floating line, the cross-sectional area of the floating line being smaller than the cross-sectional area of the connecting line when the multiplex valve (4) is in the floating position;
the container overturning control method further comprises a container descending control method, and the container descending control method comprises the following steps:
s200: confirming that the multiplex valve (4) is in a lowered position;
s210: acquiring a turnover angle of the container (200) relative to the frame (100);
S220: comparing the turning angle with the floating critical angle;
if the flip angle is not greater than the floating critical angle, executing step S230;
S230: controlling the multiway valve (4) to move to a floating position.
10. Articulated dump truck, characterized by comprising a container turning device according to any one of claims 1-5, further comprising a frame (100) and a container (200) articulated to the frame (100), wherein the container turning device is arranged on the frame (100) and is used for driving the container (200) to turn relative to the frame (100).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411441954.6A CN118953203B (en) | 2024-10-16 | 2024-10-16 | Container overturning device, container overturning control method and hinged dumper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411441954.6A CN118953203B (en) | 2024-10-16 | 2024-10-16 | Container overturning device, container overturning control method and hinged dumper |
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| CN118953203A true CN118953203A (en) | 2024-11-15 |
| CN118953203B CN118953203B (en) | 2024-12-20 |
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| CN202012522U (en) * | 2011-03-30 | 2011-10-19 | 三一重机有限公司 | Balanced valve bank for lifting system of mining dumper |
| CN204432476U (en) * | 2014-12-24 | 2015-07-01 | 陕西同力重工股份有限公司 | A kind of packing case lifting system of quarry tipper |
| CN115899004A (en) * | 2023-01-09 | 2023-04-04 | 临工重机股份有限公司 | Hydraulic dumping control system of dump truck and its control method |
| WO2023092871A1 (en) * | 2021-11-23 | 2023-06-01 | 江苏汇智高端工程机械创新中心有限公司 | Working link, valve port independent control type multi-way valve, and engineering machine |
| US20240200305A1 (en) * | 2022-12-16 | 2024-06-20 | Xuzhou Xcmg Excavator Machinery Co., Ltd. | Hydraulic control system for boom floating of excavator and control method thereof |
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2024
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202012522U (en) * | 2011-03-30 | 2011-10-19 | 三一重机有限公司 | Balanced valve bank for lifting system of mining dumper |
| CN204432476U (en) * | 2014-12-24 | 2015-07-01 | 陕西同力重工股份有限公司 | A kind of packing case lifting system of quarry tipper |
| WO2023092871A1 (en) * | 2021-11-23 | 2023-06-01 | 江苏汇智高端工程机械创新中心有限公司 | Working link, valve port independent control type multi-way valve, and engineering machine |
| US20240200305A1 (en) * | 2022-12-16 | 2024-06-20 | Xuzhou Xcmg Excavator Machinery Co., Ltd. | Hydraulic control system for boom floating of excavator and control method thereof |
| CN115899004A (en) * | 2023-01-09 | 2023-04-04 | 临工重机股份有限公司 | Hydraulic dumping control system of dump truck and its control method |
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| CN118953203B (en) | 2024-12-20 |
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