A lift and heat sink oil supply system and a loader

Abstract

The utility model provides a kind of lifting heat dissipation oil source system and loader, it is related to loader hydraulic system field.Lifting module and heat dissipation module are communicated with the oil pump of oil source module by switching module, i.e. Lifting module and heat dissipation module share an oil pump, lifting module and heat dissipation module are no longer independent of each other, so, lifting module or heat dissipation module can be controlled by an oil pump, compared with the lifting module and heat dissipation module independent of each other, the system control is more convenient, effectively reduces comprehensive manufacturing cost and installation and maintenance are also relatively simple.

Description

Technical Field

[0001] This application relates to the field of hydraulic systems for loaders, and in particular to a lifting and cooling oil source system and a loader. Background Technology

[0002] The existing hydraulic system of loaders includes a cab lifting module and a cooling module. These two modules are usually controlled by independent oil pumps, meaning that the cab lifting module and the cooling module are two independent modules. This increases the manufacturing cost of the existing hydraulic system of loaders and makes installation and maintenance inconvenient. In addition, controlling two independent modules is also quite complicated. Utility Model Content

[0003] In view of this, the purpose of this application is to provide a lifting and cooling oil source system and loader to solve the problems that the existing cab lifting module and cooling module are two independent modules, which leads to more complex control, higher cost and inconvenience in installation and maintenance.

[0004] In accordance with the above objectives, a first aspect of this utility model provides a lifting and cooling oil source system, wherein the lifting and cooling oil source system comprises: The oil source module includes an oil tank and an oil pump, wherein the oil inlet of the oil pump is connected to the oil tank; The lifting module is connected to the oil pump outlet via a switching module; The heat dissipation module is connected to the oil outlet of the oil pump via a switching module; the heat dissipation module and the lifting module share one oil pump. The switching module has a first state and a second state. When the switching module is in the first state, the oil pump can deliver the hydraulic oil in the oil tank to the lifting module through the switching module. When the switching module is in the second state, the oil pump can deliver the hydraulic oil in the oil tank to the heat dissipation module through the switching module.

[0005] Preferably, the switching module is a directional valve, which has a first position, a second position, and a third position. When the switching module is in the first state, the directional valve is in the first position or the second position. When the switching module is in the second state, the directional valve is in the third position.

[0006] Preferably, the reversing valve has an oil inlet, an oil return port, and two working oil ports. The oil inlet of the reversing valve is connected to the oil outlet of the oil pump, the two working oil ports of the reversing valve are connected to the lifting module, and the oil return port of the reversing valve is connected to the heat dissipation module. When the reversing valve is in the third position, the oil inlet and return port of the reversing valve are connected. When the reversing valve is in the first position, the oil inlet of the reversing valve is connected to one of the two working ports. When the reversing valve is in the second position, the oil inlet of the reversing valve is connected to the other of the two working ports.

[0007] Preferably, the oil pump outlet is connected to the reversing valve inlet via a first branch; the oil source module further includes a shut-off valve, the shut-off valve inlet is connected to the first branch, the shut-off valve outlet is connected to the oil tank, and the shut-off valve has a shut-off position and a connection position; When the reversing valve is in the first position or the second position, the shut-off valve is in the shut-off position.

[0008] Preferably, the lifting and cooling oil source system further includes: Temperature sensor, used to detect the temperature of the medium being cooled; The controller is communicatively connected to the temperature sensor, the reversing valve, and the shut-off valve. The controller is used to control the shut-off valve to operate according to the value measured by the temperature sensor when the reversing valve is in the third position.

[0009] Preferably, when the temperature sensor measures a value greater than a preset value, the controller controls the shut-off valve to be in the shut-off position, and the hydraulic oil flows sequentially through the oil pump, the first branch, the oil inlet of the reversing valve, and the oil return port of the reversing valve to the heat dissipation module. When the temperature sensor measures a value less than or equal to a preset value, the controller controls the shut-off valve to be in the connected position.

[0010] Preferably, the heat dissipation module includes: A hydraulic motor, wherein the oil inlet of the hydraulic motor is connected to the switching module; At least one heat dissipation component is provided for corresponding to at least one bridge. Each heat dissipation component includes an oil suction pump and an oil cooler. The oil suction port of the oil suction pump is connected to the oil outlet of the bridge. The oil outlet of the oil suction pump is connected to the oil inlet of the bridge through the oil cooler. The hydraulic motor and the oil suction pump are connected to form a motor pump. The hydraulic motor drives the oil suction pump to draw oil.

[0011] Preferably, the lifting module includes at least one lifting component, and each lifting component includes: A hydraulic lock or balance valve is connected to the switching module; A lifting cylinder, which is connected to the hydraulic lock or the balance valve.

[0012] Preferably, the oil source module further includes a first overflow valve, the two ends of which are respectively connected to the oil outlet of the oil pump and the oil tank; And / or, the directional valve is an electrically controlled valve or a hydraulically controlled valve.

[0013] According to a second aspect of the present invention, a loader is provided, wherein the loader includes a lifting and cooling oil source system as described above.

[0014] According to the lifting oil source system and loader of this utility model, both the lifting module and the heat dissipation module are connected to the oil pump of the oil source module through a switching module. That is, the lifting module and the heat dissipation module share a single oil pump, and the lifting module and the heat dissipation module are no longer independent of each other. In this way, the lifting module or the heat dissipation module can be controlled by a single oil pump. Compared with the existing independent lifting module and heat dissipation module, this system is easier to control, effectively reduces the overall manufacturing cost, and is also simpler to install and maintain.

[0015] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of a lifting and cooling oil source system according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the unloading circuit in operation according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the reversing valve in the third position according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the reversing valve in the first position according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the reversing valve in the second position according to an embodiment of the present invention.

[0018] Icons: 11-Oil tank; 12-Oil pump; 13-Shut-off valve; 14-First relief valve; 21-Directional control valve; 22-Hydraulic lock; 23-Lifting cylinder; 31-Front axle; 32-Rear axle; 33-Temperature sensor; 41-Hydraulic motor; 42-Oil suction pump; 43-Oil filter; 44-Oil cooler; 45-Second relief valve; 5-First branch. Detailed Implementation The following detailed embodiments are provided to help the reader gain a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will be apparent after understanding the disclosure of this application. For example, the order of operations described herein is merely illustrative and is not limited to the order set forth herein; changes that will be apparent after understanding the disclosure of this application are possible, except for operations that must occur in a specific order. Furthermore, for clarity and brevity, descriptions of features known in the art may be omitted.

[0019] The features described herein may be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided merely to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein that will be apparent upon understanding the disclosure of this application.

[0020] Throughout the specification, when an element (such as a layer, region, or substrate) is described as being "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, it may be directly "on" another element, "connected to" another element, "bonded to" another element, "on" another element, or "covering" another element, or there may be one or more other elements in between. In contrast, when an element is described as being "directly on" another element, "directly connected to" another element, "directly bonded to" another element, "directly on" another element, or "directly covering" another element, there may be no other elements in between.

[0021] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0022] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0023] For ease of description, spatial relation terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relation terms are intended to include not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relation terms used herein will be interpreted accordingly.

[0024] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0025] Variations in the shapes shown in the accompanying drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the accompanying drawings, but include changes in shape that may occur during manufacturing.

[0026] The features of the examples described herein can be combined in various ways that will be apparent upon understanding the disclosure of this application. Furthermore, although the examples described herein have a wide variety of constructions, other constructions are possible, as will be apparent upon understanding the disclosure of this application.

[0027] The first aspect of this utility model provides a lifting and cooling oil source system, such as... Figures 1 to 5 As shown, the lifting and cooling oil source system in this embodiment includes a cooling module, a lifting module, and an oil source module. The cooling module can dissipate heat from the hydraulic oil and deliver the cooled hydraulic oil to the front axle 31 and / or the rear axle 32. The lifting module can raise or lower the cab. The oil source module can supply hydraulic oil to the cooling module or the lifting module. The specific structure and connection relationships of the above-mentioned modules of the lifting and cooling oil source system according to this utility model (hereinafter referred to as "this system") will be described in detail below.

[0028] In this embodiment, as Figures 1 to 5As shown, both the lifting module and the cooling module are connected to the oil supply module via a switching module. This allows the lifting module and the cooling module to share a single oil pump 12, effectively reducing the control complexity of the system and improving control efficiency and flexibility. Specifically, the switching module has a first state and a second state. When the switching module is in the first state, the oil pump 12 delivers hydraulic oil from the oil tank 11 to the lifting module through the switching module; when the switching module is in the second state, the oil pump 12 delivers hydraulic oil from the oil tank 11 to the cooling module through the switching module.

[0029] In this embodiment, as Figure 1 As shown, the oil source module includes an oil tank 11, an oil pump 12, a shut-off valve 13, and a first overflow valve 14. The oil inlet of the oil pump 12 is connected to the oil tank 11, and the oil outlet of the oil pump 12 is connected to the switching module via a first branch 5. The shut-off valve 13 has a shut-off position and a connected position. Its oil inlet is connected to the first branch 5, and its oil outlet is connected to the oil tank 11, so that the oil tank 11, the oil pump 12, and the shut-off valve 13 can be connected sequentially to form an unloading circuit. In addition, the two ends of the first overflow valve 14 are connected to the oil outlet of the oil pump 12 (through connection with the first branch 5) and the oil tank 11, respectively. The connection point of the first overflow valve 14 and the first branch 5 is closer to the switching module than the connection point of the shut-off valve 13 and the first branch 5, so that the first overflow valve 14 can achieve its overflow protection effect.

[0030] In this embodiment, as Figure 1 As shown, the switching module specifically forms a reversing valve 21 (in this embodiment, one reversing valve 21 is provided, but two reversing valves 21 can also be connected to achieve the above-mentioned technical effect). The reversing valve 21 has a first position, a second position, and a third position. When the switching module is in the first state, the reversing valve 21 is in the first position or the second position (e.g., Figures 4 to 5 (As shown); when the switching module is in the second state, the reversing valve 21 is in the third position (as shown). Figure 3 (As shown).

[0031] Furthermore, the directional control valve 21 has an oil inlet, an oil return port, and two working ports. The oil inlet of the directional control valve 21 is connected to the oil outlet of the oil pump 12, the two working ports of the directional control valve 21 are connected to the lifting module, and the oil return port of the directional control valve 21 is connected to the cooling module. Figure 3 As shown, when the directional valve 21 is in the third position, the inlet and outlet ports of the directional valve 21 are connected (i.e., the directional valve 21 adopts an open-center neutral position technique with the p port and T port connected); as Figure 4 As shown, when the directional valve 21 is in the first position, the oil inlet of the directional valve is connected to the working oil port located on the right side; as Figure 5As shown, when the reversing valve 21 is in the second position, the oil inlet of the reversing valve 21 is connected to the working oil port located on the left.

[0032] Furthermore, the system also includes temperature sensors 33. Two temperature sensors 33 are connected to the front axle 31 and the rear axle 32 respectively, to detect the temperature of the cooling medium (i.e., hydraulic oil) in the front axle 31 and the rear axle 32 in real time. In addition, the system includes a controller (not shown in the figure), and the temperature sensors 33, the directional control valve 21, and the shut-off valve 13 are all communicatively connected to the controller. Thus, the directional control valve 21 can be linked with the shut-off valve 13. When the directional control valve 21 is in the first or second position, the shut-off valve 13 is in the shut-off position; when the directional control valve 21 is in the third position, the controller can control the shut-off valve 13 to operate based on the value measured by the temperature sensors 33.

[0033] Specifically, when the value measured by temperature sensor 33 is greater than the preset value, the controller controls the shut-off valve 13 to be in the shut-off position, and the hydraulic oil flows sequentially through oil pump 12, first branch 5, oil inlet of reversing valve 21, and oil return port of reversing valve 21 to the heat dissipation module (e.g., Figure 3 (As shown); when the value measured by temperature sensor 33 is less than or equal to the preset value, the controller controls the shut-off valve 13 to be in the connected position (as shown). Figure 2 As shown in the figure, the unloading circuit is in operation at this time, and the hydraulic oil in the oil pump 12 flows back to the oil tank 11 through the shut-off valve 13. The system achieves unloading, so that the system has a good energy saving effect.

[0034] In this embodiment, as Figure 1 As shown, the lifting module includes two sets of lifting components. Each lifting component includes a hydraulic lock 22 (or may also be configured as a balance valve) and a lifting cylinder 23. The hydraulic lock 22 is connected to the directional valve 21, and the lifting cylinder is connected to the hydraulic lock 22. Figure 4 As shown, when the controller controls the directional valve 21 to be in the first position, the shut-off valve 13 is in the shut-off position. The directional valve 21 delivers hydraulic oil from the oil tank 11 to the first chambers of the two lifting cylinders 23, causing the movable ends of the two lifting cylinders 23 to extend, thereby lifting the cockpit. Figure 5 As shown, when the controller controls the reversing valve 21 to be in the second position, the shut-off valve 13 is in the shut-off position. The reversing valve 21 delivers the hydraulic oil in the oil tank 11 to the second chamber of the two lifting cylinders 23, so that the moving ends of the two lifting cylinders 23 retract, thereby realizing the descent of the cockpit.

[0035] In this embodiment, as Figure 1As shown, the heat dissipation module includes a hydraulic motor 41, the oil inlet of which is connected to the oil return port of the aforementioned reversing valve 21. Furthermore, the heat dissipation module also includes at least one heat dissipation component for corresponding to at least one axle. In this embodiment, the system specifically has two heat dissipation components, respectively connected to the front axle 31 and the rear axle 32.

[0036] Specifically, each heat dissipation component includes an oil suction pump 42, an oil filter 43, an oil cooler 44, and a second relief valve 45. The oil suction port of the oil suction pump 42 is connected to the oil outlet of the corresponding front axle 31 or rear axle 32, and the oil outlet of the oil suction pump 42 is connected to the oil inlet of the corresponding front axle 31 or rear axle 32 through the oil filter 43 and the oil cooler 44 in sequence. In addition, a hydraulic motor 41 is connected to the oil suction pump 42 to form a motor pump, which can drive the oil suction pump 42 to draw oil. Furthermore, the two ends of the second relief valve 45 are connected to the oil suction port of the oil suction pump 42 and the oil outlet of the oil filter 43, respectively. When the circulating pressure of the hydraulic oil in the heat dissipation component exceeds a set value, the hydraulic oil flows through the second relief valve 45 to the oil suction port of the hydraulic motor 41, so that the second relief valve 45 can achieve its overflow protection effect.

[0037] Thus, as Figure 3 As shown, when the value measured by the temperature sensor 33 is greater than the preset value, the controller controls the shut-off valve 13 to be in the shut-off position. The hydraulic oil flows sequentially through the oil pump 12, the first branch 5, the oil inlet of the reversing valve 21, and the oil return port of the reversing valve 21 to the heat dissipation module. The hydraulic oil merges with the hydraulic oil in the front axle 31 and the rear axle 32, is filtered by the oil filter 43, and then flows to the oil cooler 44 for heat dissipation, and then flows back to the front axle 31 or the rear axle 32.

[0038] It should be noted that there are no specific restrictions on the specifications or types of the above-mentioned components. For example, the reversing valve 21 in this embodiment can be formed as an electrically controlled valve or a hydraulically controlled valve, as long as the above-mentioned technical effects can be achieved.

[0039] According to the lifting and cooling oil source system described above, both the lifting module and the cooling module are connected to the oil pump 12 of the oil source module via a reversing valve 21. That is, the lifting module and the cooling module share a single oil pump 12, and are no longer independent of each other. Thus, either the lifting module or the cooling module can be controlled by a single oil pump 12. Compared to existing independent lifting and cooling modules, this system is simpler to control, effectively reduces overall manufacturing costs, and is easier to install and maintain. Furthermore, this system is equipped with a shut-off valve 13, so that when the cooling module temperature is low (no cooling is required), the oil pump 12 can be unloaded, resulting in better energy-saving effects.

[0040] According to a second aspect of the present invention, a loader is provided, which includes the lifting and cooling oil source system described above. The loader has a front axle 31 and a rear axle 32, and the lifting and cooling oil source system is connected to the front axle 31 and the rear axle 32. However, it is not limited thereto, and the lifting and cooling oil source system can also be used on other equipment with lifting components and axles. Finally, it should be noted that the above-described embodiments are merely specific implementations of this application, used to illustrate the technical solutions of this application, and not to limit them. The protection scope of this application is not limited thereto. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this application. Such modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be covered within the protection scope of this application. Therefore, the protection scope of this application should be defined by the protection scope of the claims.

Claims

1. A lifting and cooling oil source system, characterized in that, The lifting and cooling oil source system includes: The oil source module includes an oil tank (11) and an oil pump (12), wherein the oil inlet of the oil pump (12) is connected to the oil tank (11); The lifting module is connected to the oil outlet of the oil pump (12) via a switching module; The heat dissipation module is connected to the oil outlet of the oil pump (12) through a switching module; the heat dissipation module and the lifting module share one oil pump (12). The switching module has a first state and a second state. When the switching module is in the first state, the oil pump (12) can deliver the hydraulic oil in the oil tank (11) to the lifting module through the switching module. When the switching module is in the second state, the oil pump (12) can deliver the hydraulic oil in the oil tank (11) to the heat dissipation module through the switching module.

2. The lifting and cooling oil source system according to claim 1, characterized in that, The switching module is a reversing valve (21), which has a first position, a second position and a third position. When the switching module is in the first state, the reversing valve (21) is in the first position or the second position. When the switching module is in the second state, the reversing valve (21) is in the third position.

3. The lifting and cooling oil source system according to claim 2, characterized in that, The reversing valve (21) has an oil inlet, an oil return port and two working oil ports. The oil inlet of the reversing valve (21) is connected to the oil outlet of the oil pump (12). The two working oil ports of the reversing valve (21) are connected to the lifting module. The oil return port of the reversing valve (21) is connected to the heat dissipation module. When the reversing valve (21) is in the third position, the oil inlet and the oil return port of the reversing valve (21) are connected. When the reversing valve (21) is in the first position, the oil inlet of the reversing valve (21) is connected to one of the two working oil ports. When the reversing valve (21) is in the second position, the oil inlet of the reversing valve (21) is connected to the other of the two working oil ports.

4. The lifting and cooling oil source system according to claim 3, characterized in that, The oil outlet of the oil pump (12) is connected to the oil inlet of the reversing valve (21) through the first branch (5); the oil source module also includes a shut-off valve (13), the oil inlet of the shut-off valve (13) is connected to the first branch (5), the oil outlet of the shut-off valve (13) is connected to the oil tank (11), and the shut-off valve (13) has a shut-off position and a connection position; When the reversing valve (21) is in the first position or the second position, the shut-off valve (13) is in the shut-off position.

5. The lifting and cooling oil source system according to claim 4, characterized in that, The lifting and cooling oil source system also includes: Temperature sensor (33) is used to detect the temperature of the medium being cooled; The controller is communicatively connected to the temperature sensor (33), the reversing valve (21), and the shut-off valve (13). The controller is used to control the shut-off valve (13) to operate according to the value measured by the temperature sensor (33) when the reversing valve (21) is in the third position.

6. The lifting and cooling oil source system according to claim 5, characterized in that, When the value measured by the temperature sensor (33) is greater than the preset value, the controller controls the shut-off valve (13) to be in the shut-off position, and the hydraulic oil flows sequentially through the oil pump (12), the first branch (5), the oil inlet of the reversing valve (21), and the oil return port of the reversing valve (21) to the heat dissipation module. When the value measured by the temperature sensor (33) is less than or equal to a preset value, the controller controls the shut-off valve (13) to be in the connected position.

7. The lifting and cooling oil source system according to any one of claims 1 to 6, characterized in that, The heat dissipation module includes: A hydraulic motor (41) has its oil inlet connected to the switching module; At least one heat dissipation component is provided for corresponding to at least one bridge. Each heat dissipation component includes an oil suction pump (42) and an oil radiator (44). The oil suction port of the oil suction pump (42) is connected to the oil outlet of the bridge. The oil outlet of the oil suction pump (42) is connected to the oil inlet of the bridge through the oil radiator (44). The hydraulic motor (41) and the oil suction pump (42) are connected to form a motor pump. The hydraulic motor (41) drives the oil suction pump (42) to suction oil.

8. The lifting and cooling oil source system according to any one of claims 1 to 6, characterized in that, The lifting module includes at least one lifting component, and each lifting component includes: A hydraulic lock (22) or a balance valve is connected to the switching module; The lifting cylinder (23) is connected to the hydraulic lock (22) or the balance valve.

9. The lifting and cooling oil source system according to any one of claims 2 to 6, characterized in that, The oil source module also includes a first overflow valve (14), the two ends of which are connected to the oil outlet of the oil pump (12) and the oil tank (11), respectively. And / or, the directional valve (21) is an electrically controlled valve or a hydraulically controlled valve.

10. A loader, characterized in that, The loader includes a lifting and cooling oil source system as described in any one of claims 1 to 9.

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