Snow wing, control method and working machine

Abstract

The present application relates to the technical field of motor graders, and discloses a snow removing wing, a control method and an engineering machine, the snow removing wing comprising: a stand; a snow removing wing body and a driving oil cylinder, the snow removing wing body being detachably arranged on the stand; and a hydraulic assembly comprising a floating balance valve group, the hydraulic assembly being adapted to drive the driving oil cylinder to act, so as to drive the snow removing wing body to switch between a lifting state, a holding state and a floating state; one end of the hydraulic assembly is directly adapted to connect an external valve port, without the need to substantially modify the original hydraulic system and pipeline of the motor grader or other engineering machines, so that the pressure in the rod cavity and the rodless cavity can be adjusted to adapt to different snow removing requirements, the snow removing operation efficiency is improved, and the operation time and labor cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of grader technology, specifically to a snowplow control system, control method, and engineering machinery. Background Technology

[0002] A grader is an earthmoving machine that uses a scraper to level the ground, and it can also be used for snow removal with its central blade. Although the central blade of a grader has various postures and is flexible in adjustment, it still has many inconveniences when used as a snow removal tool.

[0003] By adding side-wing snow removal wings to the grader, snow removal operations are highly efficient, have a wide operating range, and can be carried out in certain special spaces.

[0004] However, in related technologies, when adding side-wing snow removal wings to a grader, it is usually necessary to make extensive modifications to the grader's original hydraulic system, pipeline layout, and installation structure, which faces the problem of poor hydraulic system compatibility. Summary of the Invention

[0005] This invention provides a snowplow control system, control method, and engineering machinery to solve the problem in related technologies where snowplows require significant modifications to the hydraulic system when installed on a grader, leading to inconvenience in installation.

[0006] In a first aspect, the present invention provides a snow removal wing, comprising: Columns; Snow removal wing body, which can be detachably installed on the column; The drive cylinder is suitable for driving the snowplow body to move up and down along the height of the column; the drive cylinder includes a rod chamber and a rodless chamber. The hydraulic component has one end adapted to connect to an external valve port and the other end adapted to connect to a drive cylinder. The hydraulic component is adapted to drive the drive cylinder to switch the snow removal wing body between lifting, holding and floating states. The hydraulic components include: The floating balancing valve assembly is connected to the rod chamber and the rodless chamber respectively. In the floating state, the floating balancing valve assembly is suitable for dynamically balancing the pressure of the rod chamber and the rodless chamber. In the holding state, the floating balancing valve assembly is suitable for maintaining the pressure of the rod chamber and the rodless chamber at a constant value. In the lifting state, the floating balancing valve assembly is suitable for creating a pressure difference between the rod chamber and the rodless chamber.

[0007] Beneficial effects: One end of the hydraulic component is directly connected to an external valve port, eliminating the need for significant modifications to the existing hydraulic systems and pipelines of construction machinery such as graders. Simply connect the hydraulic component to the existing hydraulic system of the grader or other construction machinery, and adjust the balance valve group of the hydraulic component to adjust the pressure in the rod chamber and rodless chamber. This allows the snowplow blade to switch between lifting, holding, and floating states to adapt to different snow removal needs, improve snow removal efficiency, and reduce operating time and labor costs.

[0008] In one alternative embodiment, the hydraulic assembly further includes a first conduit and a second conduit, the first conduit being adapted to connect the rodless chamber and an external valve port, and the second conduit being adapted to connect the rod chamber and an external valve port. The hydraulic components include: The first check valve is connected in parallel in the first pipeline; the first check valve is adapted to allow hydraulic oil to flow from the external valve port to the rodless chamber and to block the hydraulic oil from flowing back from the rodless chamber to the external valve port.

[0009] The second check valve is connected in parallel in the second pipeline. The second check valve is adapted to allow hydraulic oil to flow from the external valve port to the rod chamber and to prevent hydraulic oil from flowing back from the rod chamber to the external valve port.

[0010] Beneficial effects: When the snowplow body needs to be raised, hydraulic oil can flow into the rodless chamber through the first check valve; when the snowplow body needs to be lowered, hydraulic oil can flow into the rod chamber through the second check valve, while blocking backflow. This prevents the hydraulic oil from flowing back from the rod or rodless chamber to the external valve port, which could cause the drive cylinder to shift position after operation, ensuring smooth and rapid lifting and lowering of the snowplow body. At the same time, it improves the sealing and stability of the hydraulic system. The first and second check valves can effectively prevent pressure loss caused by hydraulic oil backflow, avoiding problems such as insufficient cylinder power and operation interruption due to pressure leakage, and reducing the failure rate of the hydraulic system.

[0011] In one alternative implementation, the floating balancing valve assembly includes: A first sequence valve is disposed in a first pipeline. The first sequence valve includes a first external control port a. When hydraulic oil is introduced into the first external control port a, the first sequence valve is adapted to connect the first pipeline so that the hydraulic oil can flow back from the rodless chamber to the external valve port. When hydraulic oil is not introduced into the first external control port a, the first sequence valve is adapted to disconnect the first pipeline. The second sequence valve is disposed in the second pipeline. The second sequence valve includes a second external control port b. When hydraulic oil is introduced into the second external control port b, the second sequence valve is adapted to connect the second pipeline so that the hydraulic oil can flow back from the rod chamber to the external valve port. When hydraulic oil is not introduced into the second external control port b, the second sequence valve is adapted to cut off the second pipeline.

[0012] Beneficial effects: In one alternative implementation, the floating balancing valve assembly further includes: The first shuttle valve is connected in parallel to the first pipeline and the second pipeline. The first shuttle valve is adapted to receive hydraulic oil from the first pipeline or the second pipeline and to allow hydraulic oil to flow into the first external control port a and the second external control port b.

[0013] Beneficial effects: The first shuttle valve can receive hydraulic oil from the first or second pipeline, allowing hydraulic oil to flow into the first external control port a and the second external control port b, thereby opening the first sequence valve and the second sequence valve, ensuring smooth oil return during the snow removal wing body's ascent and descent. Furthermore, when hydraulic oil is not flowing into the first or second pipeline, the valve can block the first and second pipelines, keeping the snow removal wing body in a holding state.

[0014] In one alternative implementation, the floating balancing valve assembly further includes: The second shuttle valve is adapted to connect to the oil supply port P so that hydraulic oil can be introduced into the first external control port a and the second external control port b.

[0015] Beneficial effects: The second shuttle valve is directly connected to the external oil supply port P and can independently provide pilot pressure oil to the first external control port a and the second external control port b. It can simultaneously open the first sequence valve and the second sequence valve, so that the first pipeline and the second pipeline are synchronously connected, allowing the rod chamber and the rodless chamber of the drive cylinder to freely return oil and unload, thereby stably realizing the floating function of the snow removal blade, enabling the snow removal blade to adapt to the undulation of the road surface and complete the contour-following ground operation.

[0016] In one alternative embodiment, the hydraulic assembly further includes: The second switching valve is adapted to connect the second shuttle valve and the oil supply port P. The second switching valve includes a second conducting position adapted to connect the oil supply port P and the second shuttle valve, and a second shut-off position adapted to shut off the oil supply port P and the second shuttle valve.

[0017] Beneficial effects: The second switching valve is connected between the second shuttle valve and the oil supply port P. It is used to provide an external control oil source for the second shuttle valve, thereby realizing the floating state of the driving cylinder. At the same time, it has a simple structure and is easy to control. It does not require complex control logic and can quickly respond to the working condition switching command. Moreover, it does not require modification of the original vehicle hydraulic pipeline. It can be adapted and installed simply by connecting it in series between the second shuttle valve and the oil supply port P. This further improves the adaptability and maintainability of the hydraulic system and reduces the equipment failure rate.

[0018] In one optional embodiment, the drive cylinder includes a wing pivot end cylinder and a wing free end cylinder. The wing pivot end cylinder is located at the end of the snow removal wing body near the column, and the wing free end cylinder is located at the end of the snow removal wing body away from the column.

[0019] Beneficial effects: The drive cylinders are divided into wing pivot end cylinders and wing free end cylinders, which are respectively arranged at the end of the snow removal wing body closest to the column and the end furthest from the column. By individually controlling the height of the snow removal wing body near the column and the height of the snow removal wing body away from the column relative to the ground, the angle of the snow removal wing body can be flexibly adjusted according to the road slope, snow thickness, and working conditions. This ensures that the snow removal wing body and the road surface maintain optimal contact, effectively adapting to working environments with sloping roads, uneven roads, and different snow thicknesses. It avoids snow leakage and residual snow caused by the snow removal wing being partially suspended or the blade edge not touching the ground due to road inclination. At the same time, individually controlling the wing free end cylinder to lift it upwards allows the snow removal wing body to be vertically retracted relative to the ground. When vertically retracted, it can significantly reduce the lateral footprint of the snow removal equipment, avoid the risk of collision caused by the extension of the working parts, facilitate the road transport of the whole machine, save warehouse parking space, and improve the convenience of equipment storage and relocation.

[0020] In one optional embodiment, the hydraulic assembly further includes a first switching valve, one end of which is adapted to connect to a first pipeline and a second pipeline, and the other end of which is adapted to connect to an oil supply port P and an oil return port T. The first switching valve includes a first working position adapted to connect the first pipeline to the oil supply port P and the second pipeline to the oil return port T, a second working position adapted to connect the second pipeline to the oil supply port P and the first pipeline to the oil return port T, and a third working position adapted to connect both the first pipeline and the second pipeline to the oil return port T.

[0021] Secondly, the present invention also provides a control method applicable to the snow removal wing as described above, the control method comprising: Obtain instruction information and control the first and second switching valves to make the drive cylinder be in a floating state, a lifting state, or a locked state.

[0022] In one alternative implementation, the first switching valve is switched to the second working position, and the second switching valve is switched to the second conducting position, so that the drive cylinder is in a floating state.

[0023] In one optional implementation, the first switching valve is switched to the first working position, the second switching valve is in the second cut-off position, and the extension rod of the drive cylinder extends; or, the first switching valve is switched to the second working position, the second switching valve is in the second cut-off position, and the extension rod of the drive cylinder retracts.

[0024] Thirdly, the present invention also provides an engineering machine, including a mechanical body and a snow removal wing as described above.

[0025] Beneficial effects: Since the construction machinery includes the aforementioned snowplow blades, it possesses the same beneficial effects. The tilt angle of the snowplow blades can be adjusted via a drive cylinder to adapt to different road slopes and snow accumulation conditions. Simultaneously, through the action of hydraulic components, the snowplow blade body can be in a floating, lifting, or locked state, flexibly switching working modes according to actual operational needs. In the floating state, it can adaptively conform to the road surface's contours, effectively preventing snow leakage and residual snow, and also avoiding scratches and compression damage to the road surface. In the lifting state, the snowplow blades can be quickly raised and lowered off the ground. In the locked state, the snowplow blades can be stably maintained at their current working height, preventing them from settling or shifting during operation. Furthermore, it can be adapted and installed without large-scale modifications to the existing hydraulic system of the construction machinery, offering strong compatibility and convenient installation. This significantly expands the operational functions and applicable scenarios of construction machinery such as graders, improving equipment utilization and practical engineering application value. Attached Figure Description

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a snow removal wing according to an embodiment of the present invention; Figure 2 This is a schematic diagram of a snow removal wing control system according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the hydraulic components of a snowplow control system according to an embodiment of the present invention; Figure 4 for Figure 2 A magnified view of part A in the diagram.

[0028] Explanation of reference numerals in the attached figures: 1. Column; 2. Snow removal wing body; 21. Wing pivot end; 22. Free end; 3. Drive cylinder; 31. Wing pivot end cylinder; 32. Wing free end cylinder; 4. Side sway cylinder; 100. Hydraulic assembly; 101. Floating balance valve assembly; 5. First switching valve; 51. First working position; 52. Second working position; 6. First pipeline; 61. First check valve; 62. First sequence valve; 7. Second pipeline; 71. Second check valve; 72. Second sequence valve; 8. Second switching valve; 91. First shuttle valve; 92. Second shuttle valve. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In road snow removal operations, snowplow wings are often added as working devices to graders. In related technologies, adding snowplow wings to graders usually requires extensive modifications to the grader's original hydraulic system, pipeline layout, and installation structure. The modifications are quite complicated and costly, and can damage the original structure and overall performance of the grader, making it difficult to install snowplow wings on graders.

[0031] Meanwhile, the existing hydraulic system for snowplows is relatively complex, with a large number of valve groups and pipelines, and poor compatibility with the original hydraulic system of the grader, further increasing the difficulty of installation and making it difficult to install snowplows conveniently, quickly, and at low cost, thus failing to meet the actual usage needs for rapid installation of snowplows.

[0032] The following is combined with Figures 1 to 4 The following describes embodiments of the present invention.

[0033] According to an embodiment of the present invention, in one aspect, a snow removal wing is provided, comprising: Column 1; Snow removal wing body 2, which is detachably mounted on column 1; The drive cylinder 3 is suitable for driving the snow removal wing body 2 to move up and down along the height direction of the column 1; the drive cylinder 3 includes a rod chamber and a rodless chamber. Hydraulic component 100, one end of which is adapted to be connected to an external valve port, and the other end is connected to a drive cylinder 3. Hydraulic component 100 is adapted to drive the drive cylinder 3 to move, thereby driving the snow removal wing body 2 to switch between lifting state, holding state and floating state. Hydraulic assembly 100 includes: The floating balance valve assembly 101 is connected to the rod chamber and the rodless chamber respectively. In the floating state, the floating balance valve assembly 101 is adapted to dynamically balance the pressure of the rod chamber and the rodless chamber. In the holding state, the floating balance valve assembly 101 is adapted to maintain the pressure of the rod chamber and the rodless chamber unchanged. In the lifting state, the floating balance valve assembly 101 is adapted to make the pressure of the rod chamber and the rodless chamber have a difference.

[0034] In the lifting state, the snow removal wing body 2 is adapted to rise or fall along the height direction of the column 1. In the holding state, the snow removal wing body 2 is adapted to maintain the current height. In the floating state, the snow removal wing body 2 is adapted to adaptively displace with the undulation of the road surface in the height direction.

[0035] It should be noted that one end of the hydraulic component 100 is connected to an external valve port, which is the valve port in the original hydraulic system of the grader. The hydraulic component 100 achieves communication with the multi-way valve configured on the grader by connecting to the external valve port.

[0036] One end of the hydraulic component 100 is directly connected to an external valve port, eliminating the need for significant modifications to the existing hydraulic system and pipelines of construction machinery such as graders. Simply connect the hydraulic component 100 to the existing hydraulic system of the grader or other construction machinery, and adjust the balance valve group of the hydraulic component 100 to adjust the pressure in the rod chamber and rodless chamber. This allows the snow removal wing body 2 to switch between lifting, holding, and floating states, adapting to different snow removal needs, improving snow removal efficiency, and reducing operating time and labor costs.

[0037] It should be noted that the rod chamber refers to the chamber within the drive cylinder 3 that includes the piston rod, while the rodless chamber refers to the chamber that does not contain the piston rod. In conjunction with the extension and retraction of the piston rod, the specific situations of the cylinder rising and falling are as follows: When hydraulic oil is introduced into the rodless chamber and discharged from the rod chamber, the pressure in the rodless chamber is greater than the pressure in the rod chamber. The hydraulic oil pushes the piston rod outward, thereby causing the snowplow body 2 to rise. When hydraulic oil is introduced into the rod chamber and discharged from the rodless chamber, the pressure in the rod chamber is greater than the pressure in the rodless chamber. The hydraulic oil pushes the piston rod inward, thereby causing the snowplow body 2 to fall.

[0038] In the lifting state, the pressure difference between the rod-side chamber and the rodless chamber drives the snowplow to rise and fall, making it easy to adjust the height of the snowplow. In the holding state, the pressure between the rod-side chamber and the rodless chamber remains constant, locking the position of the snowplow and preventing positional deviation due to external forces or pressure fluctuations during operation. In the floating state, the pressure between the rod-side chamber and the rodless chamber is dynamically balanced, ensuring that the snowplow always keeps in contact with the ground, adapting to ground undulations and conforming to the ground to complete snow removal operations.

[0039] In one embodiment, the hydraulic assembly 100 further includes a first conduit 6 and a second conduit 7, the first conduit 6 being adapted to connect the rodless chamber and the external valve port, and the second conduit 7 being adapted to connect the rod chamber and the external valve port. Reference Figure 3 The hydraulic assembly 100 includes: The first check valve 61 is connected in parallel in the first pipeline 6; the first check valve 61 is adapted to allow hydraulic oil to flow from the external valve port to the rodless chamber and to block the hydraulic oil from flowing back from the rodless chamber to the external valve port.

[0040] The second check valve 71 is connected in parallel in the second pipeline 7. The second check valve 71 is adapted to allow hydraulic oil to flow from the external valve port to the rod chamber and to block the hydraulic oil from flowing back from the rod chamber to the external valve port.

[0041] When the snowplow body 2 needs to be driven to rise, hydraulic oil can flow into the rodless chamber through the first check valve 61; when the snowplow body 2 needs to be driven to fall, hydraulic oil can flow into the rod chamber through the second check valve 71, while blocking backflow. This prevents the position of the drive cylinder 3 from shifting due to hydraulic oil flowing back from the rod or rodless chamber to the external valve port, ensuring smooth and rapid lifting and lowering of the snowplow body 2. At the same time, it improves the sealing and stability of the hydraulic system. The first check valve 61 and the second check valve 71 can effectively prevent pressure loss caused by hydraulic oil backflow, avoiding problems such as insufficient cylinder power and operation interruption due to pressure leakage, and reducing the failure rate of the hydraulic system.

[0042] In one embodiment, refer to Figure 3 The floating balance valve assembly 101 includes: A first sequence valve 62 is disposed in a first pipeline 6. The first sequence valve 62 includes a first external control port a. When hydraulic oil is introduced into the first external control port a, the first sequence valve 62 is adapted to connect the first pipeline 6 so that the hydraulic oil can flow back from the rodless chamber to the external valve port. When hydraulic oil is not introduced into the first external control port a, the first sequence valve 62 is adapted to cut off the first pipeline 6. The second sequence valve 72 is disposed in the second pipeline 7. The second sequence valve 72 includes a second external control port b. When hydraulic oil is introduced into the second external control port b, the second sequence valve 72 is adapted to connect the second pipeline 7 so that the hydraulic oil can flow back from the rod chamber to the external valve port. When hydraulic oil is not introduced into the second external control port b, the second sequence valve 72 is adapted to cut off the second pipeline 7.

[0043] The functions of the first sequence valve 62 and the second sequence valve 72 are as follows: During the descent of the snowplow blade, when hydraulic oil is introduced into the rod chamber to push the piston rod back, the first check valve 61 only allows hydraulic oil to flow from the external valve port to the rodless chamber, blocking reverse flow. At this time, the hydraulic oil in the rodless chamber cannot flow back to the external valve port through the first check valve 61. However, by introducing hydraulic oil into the first external control port a, the first sequence valve 62 can be controlled to open the first pipeline 6, thereby allowing the hydraulic oil in the rodless chamber to flow through the opened first pipeline. 6. The hydraulic oil flows smoothly back to the external valve port, providing space for the piston rod to retract and ensuring the snowplow body 2 descends smoothly. Similarly, during the snowplow's ascent, when hydraulic oil is introduced into the rodless chamber to push the piston rod out, the second check valve 71 blocks the reverse flow of hydraulic oil in the rod chamber. At this time, hydraulic oil is introduced into the second external control port b, which controls the second sequence valve 72 to open the second pipeline 7, allowing the hydraulic oil in the rod chamber to flow back to the external valve port through the opened second pipeline 7, ensuring the piston rod extends smoothly and achieving the smooth ascent of the snowplow body 2.

[0044] In one embodiment, refer to Figure 3The floating balance valve assembly 101 also includes: The first shuttle valve 91 is connected in parallel to the first pipeline 6 and the second pipeline 7. The first shuttle valve 91 is adapted to receive hydraulic oil through the first pipeline 6 or the second pipeline 7 and to allow hydraulic oil to flow into the first external control port a and the second external control port b.

[0045] It should be noted that the shuttle valve works by having two receiving ports and one output port. These ports are connected to hydraulic lines in the hydraulic system. The shuttle valve can receive hydraulic oil from the side with the higher pressure in the two hydraulic lines connected to the receiving ports and output it to the hydraulic line connected to the output port.

[0046] The two receiving ports of the first shuttle valve 91 are connected to the first pipeline 6 and the second pipeline 7, respectively, and the output port is connected to the first external control port a and the second external control port b. During the ascent of the snowplow body 2, hydraulic oil is supplied to the first pipeline 6 through the external control valve port. The first external control port a and the second external control port b can receive the hydraulic oil from the first pipeline 6. The first sequence valve 62 and the second sequence valve 72 connect the first pipeline 6 and the second pipeline 7. At this time, the hydraulic oil flows as follows: the hydraulic oil in the first pipeline 6 flows into the rodless chamber through the first check valve 61, and the hydraulic oil in the rod chamber flows back to the external valve port through the second pipeline 7. During the descent of the snowplow body 2, hydraulic oil is supplied to the second pipeline 7 through the external control valve port. The first external control port a and the second external control port b can receive the hydraulic oil from the second pipeline 7. The first sequence valve 62 and the second sequence valve 72 can connect the first pipeline 6 and the second pipeline 7. At this time, the hydraulic oil flows as follows: the hydraulic oil in the second pipeline 7 flows into the rod chamber through the second check valve 71, and the hydraulic oil in the rodless chamber flows back to the external valve port through the first pipeline 6.

[0047] When the drive cylinder 3 is in the holding state, the external valve port does not supply oil to the hydraulic assembly 100. At this time, there is no hydraulic oil input in the first pipeline 6 and the second pipeline 7. Since there is no hydraulic oil input in the first external control port a and the second external control port b, the first sequence valve 62 and the second sequence valve 72 cannot connect the first pipeline 6 and the second pipeline 7. At the same time, the first check valve 61 and the second check valve 71 block the return path of hydraulic oil in the rod chamber and the rodless chamber to the external valve port. Therefore, the rod chamber and the rodless chamber of the drive cylinder 3 are in a closed pressure-holding state. The pressure in the rod chamber and the rodless chamber can be kept equal and stable, thereby realizing the position locking of the snow removal wing body 2, so that it can be stably maintained at the current height and will not be lifted or deflected due to its own weight, slight external impact or pressure fluctuation.

[0048] The first shuttle valve 91 can receive hydraulic oil from the first pipeline 6 or the second pipeline 7, allowing hydraulic oil to flow into the first external control port a and the second external control port b, thereby opening the first sequence valve 62 and the second sequence valve 72, so that the snow removal wing body 2 can return oil smoothly during the rising and falling process, and when the first pipeline 6 and the second pipeline 7 are not supplied with hydraulic oil, it can block the first pipeline 6 and the second pipeline 7, so that the snow removal wing body 2 is in a holding state.

[0049] In one embodiment, refer to Figure 3 The floating balance valve assembly 101 also includes: The second shuttle valve 92 is adapted to connect to the oil supply port P so that hydraulic oil can be introduced into the first external control port a and the second external control port b.

[0050] When the external oil supply port P supplies oil to the second shuttle valve 92, the second shuttle valve 92 can conduct the hydraulic oil from the oil supply port P to the first external control port a and the second external control port b. At this time, the first sequence valve 62 and the second sequence valve 72 are both opened, and the hydraulic oil in the rod chamber and the rodless chamber can flow back to the external valve port through the opened first pipeline 6 and the second pipeline 7, so that the pressure in the rod chamber and the rodless chamber can achieve dynamic balance, thereby realizing the floating function of the snow removal wing body 2, so that the snow removal wing can adapt to the ground undulation and follow the ground to complete the snow removal operation.

[0051] The second shuttle valve 92 is directly connected to the external oil supply port P and can independently provide pilot pressure oil to the first external control port a and the second external control port b. It can simultaneously open the first sequence valve 62 and the second sequence valve 72, so that the first pipeline 6 and the second pipeline 7 are synchronously connected, allowing the rod chamber and rodless chamber of the drive cylinder 3 to freely return oil and unload, thereby stably realizing the floating function of the snow removal blade, enabling the snow removal blade to adapt to the undulation of the road surface and complete the contour-following ground operation.

[0052] For example, the two inlets of the first shuttle valve 91 are respectively connected to the first pipeline 6 and the second pipeline 7, and the outlet of the first shuttle valve 91 is connected to one of the inlets of the second shuttle valve 92. The other inlet of the second shuttle valve 92 is directly connected to the external oil supply port P. The outlet of the second shuttle valve 92 is simultaneously connected to the first external control port a of the first sequence valve 62 and the second external control port b of the second sequence valve 72, thereby forming two oil supply paths. One path supplies oil to the second shuttle valve 92 through the first pipeline 6 and the second pipeline 7 via the first shuttle valve 91, and the other path supplies oil directly to the second shuttle valve 92 through the external oil supply port P. Finally, the second shuttle valve 92 supplies oil to the first external control port a and the second external control port b, thereby controlling the on / off state of the first sequence valve 62 and the second sequence valve 72.

[0053] In one embodiment, refer to Figure 3 The hydraulic assembly 100 also includes: The second switching valve 8 is adapted to connect the second shuttle valve 92 and the oil supply port P. The second switching valve 8 includes a second conducting position 81 adapted to connect the oil supply port P and the second shuttle valve 92, and a second cutting-off position adapted to cut off the oil supply port P and the second shuttle valve 92.

[0054] The second switching valve 8 is connected between the second shuttle valve 92 and the oil supply port P. It is used to provide an external control oil source for the second shuttle valve 92, thereby realizing the floating state of the driving cylinder 3. At the same time, its structure is simple and easy to control. It does not require complex control logic and can quickly respond to the working condition switching command. Moreover, it does not require modification of the original vehicle hydraulic pipeline. It can be adapted and installed simply by connecting it in series between the second shuttle valve 92 and the oil supply port P. This further improves the adaptability and maintainability of the hydraulic system and reduces the equipment failure rate.

[0055] When switching to the floating state is required, the second switching valve 8 is switched to the second on position 81 to ensure smooth oil supply; when switching to the lifting or holding state is required, it is switched to the second off position to avoid accidental triggering of the floating state. In practical applications, the second switching valve 8 can be a two-position two-way solenoid directional valve, which features a compact structure, fast response speed, and precise control. It can quickly switch between on and off states via electromagnetic signals, adapting to the rapid switching needs of snowplows under various working conditions; a manual directional valve can also be selected, suitable for scenarios with moderate control precision requirements and no need for automatic control. It is convenient to operate and has a low cost, and can be flexibly selected according to actual operational needs.

[0056] In one embodiment, refer to Figure 4 The driving cylinder 3 includes a wing pivot end cylinder 31 and a wing free end cylinder 32. The wing pivot end cylinder 31 is located at the end of the snow removal wing body 2 near the column 1, and the wing free end cylinder 32 is located at the end of the snow removal wing body 2 away from the column 1. In this embodiment, the end of the snow removal wing body 2 near the column 1 is the wing pivot end 21, and the end of the snow removal wing body 2 away from the column 1 is the free end 22.

[0057] The drive cylinder 3 is divided into a wing pivot end cylinder 31 and a wing free end cylinder 32, which are respectively arranged at the end of the snow removal wing body 2 near the column 1 and the end away from the column 1. By individually controlling the height of the snow removal wing body 2 near the column 1 and the height of the snow removal wing body 2 away from the column 1 relative to the ground, the angle of the snow removal wing body 2 can be flexibly adjusted according to the road slope, snow thickness and working conditions, so that the snow removal wing body 2 and the road surface are in the best fit. This effectively adapts to the working environment of sloping roads, uneven roads and different snow thicknesses, and avoids snow leakage and residual snow caused by the snow removal wing being partially suspended or the blade edge not touching the ground due to the road slope. At the same time, by individually controlling the wing free end cylinder to lift it up, the snow removal wing body 2 can be vertically folded relative to the ground. After being vertically folded, the lateral footprint of the snow removal equipment can be greatly reduced, avoiding the risk of collision caused by the extension of the working parts. This not only facilitates the road transport of the whole machine, but also saves warehouse parking space and improves the convenience of equipment storage and relocation.

[0058] Reference Figure 1 The drive cylinder 3 also includes a side-swing cylinder 4, which is adapted to adjust the distance between the end of the snowplow blade away from the frame and the frame in the horizontal plane.

[0059] Secondly, the present invention also provides a control method, wherein the hydraulic assembly 100 further includes a first switching valve 5, one end of the first switching valve 5 is adapted to connect a first pipeline 6 and a second pipeline 7, and the other end is adapted to connect an oil supply port P and an oil return port T. The first switching valve 5 includes a first working position 51 adapted to connect the first pipeline 6 to the oil supply port P and the second pipeline 7 to the oil return port T, a second working position 52 adapted to connect the second pipeline 7 to the oil supply port P and the first pipeline 6 to the oil return port T, and a third working position adapted to connect both the first pipeline 6 and the second pipeline 7 to the oil return port T.

[0060] In one embodiment, for a snowplow as described above, the control method includes: The system acquires instruction information and controls the first switching valve 5 and the second switching valve 8 to operate so that the drive cylinder 3 is in a floating state, a lifting state, or a locked state.

[0061] The second switching valve 8 is connected to the floating indicator light. When the floating function is activated, the floating indicator light will illuminate to remind the driver that the floating function is activated.

[0062] In one embodiment, the first switching valve 5 is switched to the second working position 52, and the second switching valve 8 is switched to the second conducting position 81, so that the drive cylinder 3 is in a floating state.

[0063] Reference Figures 2 to 4The first switching valve 5 is switched to the second working position 52, and the second switching valve 8 is switched to the second conducting position 81. The external oil supply port P is connected to the second shuttle valve 92 through the second switching valve 8. The hydraulic oil output from the second shuttle valve 92 is simultaneously fed into the first external control port a and the second external control port b, causing the first sequence valve 62 and the second sequence valve 72 to open simultaneously. At this time, the second working position 52 of the first switching valve 5 connects the first pipeline 6 and the second pipeline 7 to the return oil port T. The hydraulic oil in the rodless chamber and the rod chamber of the driving cylinder 3 can flow to the first switching valve 5 through the first pipeline 6 and the second pipeline 7 respectively, and finally flow back to the return oil port T. The hydraulic oil in the rod chamber and the rodless chamber of the driving cylinder 3 can flow freely and relieve pressure. The pressure in the rodless chamber and the rod chamber is balanced with each other, so that the driving cylinder 3 is in an unrestrained floating state and can swing adaptively with the undulation of the road surface.

[0064] In one embodiment, the first switching valve 5 is switched to the first working position 51, the second switching valve 8 is in the second cut-off position, and the extension rod of the driving cylinder 3 is extended; or, the first switching valve 5 is switched to the second working position 52, the second switching valve 8 is in the second cut-off position 82, and the extension rod of the driving cylinder 3 is retracted.

[0065] When the first switching valve 5 is switched to the first working position 51 and the second switching valve 8 is in the second cut-off position, the second switching valve 8 cuts off the oil supply passage from the oil supply port P to the second shuttle valve 92. The first pipeline 6 is connected to the oil supply port P and the second pipeline 7 is connected to the return oil port T. The pressure oil enters the rodless chamber of the drive cylinder 3 through the oil supply port P and the first pipeline 6. At this time, the first shuttle valve 91 obtains the high-pressure oil in the first pipeline 6 and supplies pressure oil to the first external control port a and the second external control port b respectively. The first pipeline 6 and the second pipeline 7 are connected. The oil inside the rod chamber flows back to the return oil port T through the second pipeline 7 and the first switching valve 5, pushing the extension rod of the drive cylinder 3 to extend smoothly. When the first switching valve 5 is switched to the second working position 52 and the second switching valve 8 is still in the second cut-off position 82, the pressure oil from the oil supply port P is introduced into the rod chamber of the drive cylinder 3 through the first switching valve 5 and the second pipeline 7. At this time, the first shuttle valve 91 obtains the high-pressure oil in the second pipeline 7 and supplies pressure oil to the first external control port a and the second external control port b respectively. The first pipeline 6 and the second pipeline 7 are connected, and the oil inside the rodless chamber flows back to the return oil port T through the first pipeline 6, smoothly driving the extension rod of the drive cylinder 3 to retract, realizing the stable lifting and lowering adjustment of the snow removal blade.

[0066] Thirdly, the present invention also provides an engineering machine, including a mechanical body and a snow removal wing as described above.

[0067] Since the construction machinery includes the aforementioned snow removal wings, it possesses the same beneficial effects as snow removal wings. The tilt angle of the snow removal wings can be adjusted via the drive cylinder 3 to adapt to different road slopes and snow accumulation conditions. Simultaneously, through the action of the hydraulic component 100, the snow removal wing body 2 can be in a floating, lifting, or locked state, flexibly switching working modes according to actual operational needs. In the floating state, it can adaptively conform to the road surface's contours, effectively preventing snow leakage and residual snow, and also avoiding scratches and compression damage to the road surface. In the lifting state, the snow removal wings can be quickly raised and lowered off the ground. In the locked state, the snow removal wings can be stably maintained at their current working height, preventing them from settling or shifting during operation. Furthermore, it can be adapted and installed without large-scale modifications to the original hydraulic system of the construction machinery, exhibiting strong compatibility and convenient installation. This significantly expands the operational functions and applicable scenarios of construction machinery such as graders, improving equipment utilization and practical engineering application value.

[0068] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A snow removal wing, characterized in that, include: Column (1); Snow removal wing body (2), the snow removal wing body (2) is detachably mounted on the column (1); The driving cylinder (3) is adapted to drive the snow removal wing body (2) to rise and fall along the height direction of the column (1); the driving cylinder (3) includes a rod chamber and a rodless chamber; Hydraulic assembly (100), one end of which is adapted to be connected to an external valve port and the other end is connected to the drive cylinder (3). The hydraulic assembly (100) is adapted to drive the drive cylinder (3) to move so as to drive the snow removal wing body (2) to switch between lifting state, holding state and floating state. The hydraulic assembly (100) includes: A floating balance valve assembly (101) is connected to the rod chamber and the rodless chamber respectively; in the floating state, the floating balance valve assembly (101) is adapted to dynamically balance the pressure of the rod chamber and the rodless chamber; in the holding state, the floating balance valve assembly (101) is adapted to maintain the pressure of the rod chamber and the rodless chamber unchanged; in the lifting state, the floating balance valve assembly (101) is adapted to create a pressure difference between the rod chamber and the rodless chamber.

2. The snow removal wing according to claim 1, characterized in that, The hydraulic assembly (100) further includes a first pipeline (6) and a second pipeline (7), the first pipeline (6) being adapted to connect the rodless chamber and the external valve port, and the second pipeline (7) being adapted to connect the rod chamber and the external valve port; The hydraulic assembly (100) includes: A first check valve (61) is provided in parallel in the first pipeline (6); the first check valve (61) is adapted to allow hydraulic oil to flow from the external valve port to the rodless chamber and to prevent hydraulic oil from flowing back from the rodless chamber to the external valve port. The second check valve (71) is connected in parallel to the second pipeline (7). The second check valve (71) is adapted to allow hydraulic oil to flow from the external valve port to the rod chamber and to block the hydraulic oil from flowing back from the rod chamber to the external valve port.

3. The snow removal wing according to claim 2, characterized in that, The floating balance valve assembly (101) includes: A first sequence valve (62) is disposed in the first pipeline (6). The first sequence valve (62) includes a first external control port a. When hydraulic oil is introduced into the first external control port a, the first sequence valve (62) is adapted to connect the first pipeline (6) so that the hydraulic oil can flow back from the rodless chamber to the external valve port. When hydraulic oil is not introduced into the first external control port a, the first sequence valve (62) is adapted to cut off the first pipeline (6). The second sequence valve (72) is disposed in the second pipeline (7). The second sequence valve (72) includes a second external control port b. When hydraulic oil is introduced into the second external control port b, the second sequence valve (72) is adapted to connect the second pipeline (7) so that the hydraulic oil can flow back from the rod chamber to the external valve port. When hydraulic oil is not introduced into the second external control port b, the second sequence valve (72) is adapted to cut off the second pipeline (7).

4. The snow removal wing according to claim 3, characterized in that, The floating balance valve assembly (101) also includes: A first shuttle valve (91) is provided in parallel with the first pipeline (6) and the second pipeline (7). The first shuttle valve (91) is adapted to receive hydraulic oil from the first pipeline (6) or the second pipeline (7) and to allow hydraulic oil to flow into the first external control port a and the second external control port b.

5. The snow removal wing according to claim 3, characterized in that, The floating balance valve assembly (101) also includes: The second shuttle valve (92) is adapted to connect the oil supply port P so that hydraulic oil can be supplied to the first external control port a and the second external control port b.

6. The snow removal wing according to claim 5, characterized in that, The hydraulic assembly (100) further includes: The second switching valve (8) is adapted to connect the second shuttle valve (92) and the oil supply port P. The second switching valve (8) includes a second open position (81) adapted to connect the oil supply port P and the second shuttle valve (92), and a second cut-off position (82) adapted to cut off the oil supply port P and the second shuttle valve (92).

7. The snow removal wing according to any one of claims 1 to 6, characterized in that, The drive cylinder (3) includes a wing pivot end cylinder (31) and a wing free end cylinder (32). The wing pivot end cylinder (31) is located at one end of the snow removal wing body (2) near the column (1), and the wing free end cylinder (32) is located at one end of the snow removal wing body (2) away from the column (1).

8. The snow removal wing according to claim 5, characterized in that, The hydraulic assembly (100) further includes a first switching valve (5), one end of which is adapted to connect the first pipeline (6) and the second pipeline (7), and the other end is adapted to connect the oil supply port P and the oil return port T. The first switching valve (5) includes a first working position (51) adapted to connect the first pipeline (6) to the oil supply port P and the second pipeline (7) to the oil return port T, a second working position (52) adapted to connect the second pipeline (7) to the oil supply port P and the first pipeline (6) to the oil return port T, and a third working position adapted to connect both the first pipeline (6) and the second pipeline (7) to the oil return port T.

9. A control method, characterized in that, The control method, applicable to the snowplow as described in any one of claims 1 to 8, comprises: Obtain instruction information and control the first switching valve (5) and the second switching valve (8) to make the drive cylinder (3) be in a floating state, a lifting state or a locked state.

10. The control method according to claim 9, characterized in that, Switch the first switching valve (5) to the second working position (52) and switch the second switching valve (8) to the second conducting position (81) so that the drive cylinder (3) is in a floating state.

11. The control method according to claim 9, characterized in that, When the first switching valve (5) is switched to the first working position (51) and the second switching valve (8) is in the second cut-off position (82), the extension rod of the drive cylinder (3) extends; or, when the first switching valve (5) is switched to the second working position (52) and the second switching valve (8) is in the second cut-off position (82), the extension rod of the drive cylinder (3) retracts.

12. An engineering machinery, characterized in that, It includes the mechanical body and the snow removal wing as described in any one of claims 1 to 8.

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