Integrated oil inlet valve group and forklift

Abstract

The present application relates to an integrated oil inlet valve assembly and a forklift. The integrated oil inlet valve assembly includes a main valve body, a monostable diverter valve, and a priority diverter valve. The monostable diverter valve and the priority diverter valve are both mounted on the main valve body. The main valve body is provided with a first oil inlet channel, a second oil inlet channel, a brake channel, a first control channel, a second control channel, a steering channel, and a feedback channel. The first oil inlet channel is connected to the brake channel and the first control channel respectively via the monostable diverter valve. The second oil inlet channel can be connected to the second control channel, the steering channel, and the feedback channel respectively via the priority diverter valve. The second oil inlet channel is constantly connected to the steering channel via the priority diverter valve. Pressurized oil can enter the priority diverter valve via the feedback channel to control the opening between the second oil inlet channel and the second control channel via the priority diverter valve. The integrated oil inlet valve assembly and forklift solve the problem of existing forklifts being too bulky due to the excessive number of liquid pumps and oil inlet valves, as well as the high manufacturing and maintenance costs of the forklifts.

Description

Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to an integrated oil inlet valve group and a forklift. Background Art

[0002] Forklifts, as industrial handling vehicles, are indispensable to the development of modern industry. They are widely used in ports, stations, airports, freight yards, factory workshops, warehouses, distribution centers, and distribution centers. Furthermore, forklifts can enter ship cabins, train compartments, and containers to load, unload, and transport palletized cargo, making them essential equipment for pallet and container transportation.

[0003] Forklifts typically have multiple functions, including braking, steering, and lifting. Steering and braking require a continuous oil supply, while lifting requires a high-flow oil supply (non-continuous oil supply). Existing forklifts each have their own separate oil pumps and inlet valves for each module, such as braking, steering, and lifting. This increases the size of the forklift and increases manufacturing and maintenance costs. Summary of the Invention

[0004] Based on this, it is necessary to provide an integrated oil inlet valve group and a forklift to solve the problem that the existing forklift has too many liquid pumps and oil inlet valves, resulting in an excessively large size of the forklift and high manufacturing and maintenance costs of the forklift.

[0005] The integrated oil inlet valve group provided in the present application includes a main valve body, a monostable diverter valve, and a priority diverter valve. The monostable diverter valve and the priority diverter valve are both installed in the main valve body. The main valve body is provided with a first oil inlet channel, a second oil inlet channel, a brake channel, a first control channel, a second control channel, a steering channel, and a feedback channel. The first oil inlet channel is connected to the brake channel and the first control channel respectively through the monostable diverter valve. The second oil inlet channel can be connected to the second control channel, the steering channel, and the feedback channel respectively through the priority diverter valve. The second oil inlet channel is constantly connected to the steering channel through the priority diverter valve. Pressurized oil can enter the priority diverter valve through the feedback channel to control the opening between the second oil inlet channel and the second control channel through the priority diverter valve.

[0006] In one embodiment, the integrated oil inlet valve assembly further includes a first safety valve, and the main valve body further includes an oil return passage. The feedback passage can be connected to the oil return passage through the first safety valve. It is understood that such a configuration is conducive to improving the safety of the integrated oil inlet valve assembly.

[0007] In one embodiment, the main valve body further includes a flow collecting channel, and the first control channel and the second control channel are respectively connected to the flow collecting channel. It can be understood that such a configuration is conducive to reducing the number of oil inlets of the multi-way valve, thereby reducing the complexity of the forklift structure.

[0008] In one embodiment, the integrated oil inlet valve group further includes a second safety valve, and the main valve body further includes an oil return channel. The collecting channel can be connected to the oil return channel through the second safety valve. It can be understood that such a configuration is conducive to improving the safety of the integrated oil inlet valve group.

[0009] In one embodiment, the integrated oil inlet valve assembly also includes a removable plug. The main valve body also has an oil return passage. The removable plug is located between the collecting passage and the oil return passage to isolate them. It is understood that this arrangement helps reduce the production cost of the forklift.

[0010] In one embodiment, the integrated oil inlet valve assembly further includes a one-way check valve located in the steering channel to ensure one-way flow of pressurized oil from the end of the steering channel closest to the priority diverter valve to the end farther from the priority diverter valve. This arrangement, as will be appreciated, helps prevent backflow of pressurized oil within the steering channel.

[0011] In one embodiment, the one-way check valve is detachably connected to the main valve body. It is understandable that such a configuration is conducive to reducing the difficulty of installing the one-way check valve.

[0012] In one embodiment, the main valve body is provided with an assembly hole, the inner wall of the assembly hole is provided with an internal thread, and the one-way check valve is provided with an external thread that matches the internal thread. It is understood that such a configuration is conducive to improving the efficiency of disassembly and assembly of the one-way check valve.

[0013] The present application also provides a forklift, which includes a first liquid pump, a second liquid pump, a braking device, a feedback device, a steering device, a multi-way valve and an integrated oil inlet valve group as described in any one of the above embodiments, the first liquid pump is connected to the first oil inlet channel, the second liquid pump is connected to the second oil inlet channel, the braking device is connected to the braking channel, the feedback device is connected to the feedback channel, the steering device is connected to the steering channel, and the multi-way valve is connected to the first control channel and the second control channel.

[0014] In one embodiment, the displacement of the second liquid pump is greater than that of the first liquid pump. It is understood that such a configuration is conducive to the reasonable distribution of pressurized oil and improves the operating efficiency of the forklift.

[0015] Compared to the prior art, the integrated oil inlet valve group and forklift provided by this application have only two oil inlet channels: the first oil inlet channel and the second oil inlet channel. The brake channel is supplied with oil only through the first oil inlet channel, the steering channel and the feedback channel are supplied with oil only through the second oil inlet channel, and the first control channel and the second control channel are supplied with oil through the first oil inlet channel and the second oil inlet channel, respectively. In this way, two liquid pumps can supply oil to multiple modules of the forklift (including braking, feedback, lifting, and steering), reducing the number of liquid pumps required for the forklift and lowering the manufacturing and maintenance costs of the forklift. Furthermore, the oil supply to multiple modules of the forklift can be achieved through a single main valve body, making the forklift structure more compact and greatly reducing the size of the forklift. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A schematic structural diagram of an integrated oil inlet valve group according to an embodiment of the present application;

[0018] Figure 2 for Figure 1 A cross-sectional view at AA is shown;

[0019] Figure 3 for Figure 1 A cross-sectional view at BB is shown;

[0020] Figure 4 This is a piping diagram of an integrated oil inlet valve group according to an embodiment of the present application.

[0021] Reference numerals: 110, first liquid pump; 120, second liquid pump; 130, braking device; 140, feedback device; 150, steering device; 160, multi-way valve; 170, oil return device; 200, main valve body; 210, first oil inlet channel; 220, second oil inlet channel; 230, braking channel; 241, first control channel; 242, second control channel; 250, collecting channel; 260, steering channel; 270, feedback channel Channel; 280, valve chamber; 281, hydraulic chamber; 290, oil return channel; 291, assembly hole; 300, monostable diverter valve; 400, priority diverter valve; 500, valve core; 510, multi-way chamber; 520, first through hole; 530, second through hole; 540, third through hole; 550, fourth through hole; 600, return spring; 710, first safety valve; 720, second safety valve; 800, removable plug; 900, one-way check valve. DETAILED DESCRIPTION

[0022] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0024] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0025] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0026] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are intended only to describe specific embodiments and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] Forklifts, as industrial handling vehicles, are indispensable to the development of modern industry. They are widely used in ports, stations, airports, freight yards, factory workshops, warehouses, distribution centers, and distribution centers. Furthermore, forklifts can enter ship cabins, train compartments, and containers to load, unload, and transport palletized cargo, making them essential equipment for pallet and container transportation.

[0029] Forklifts typically have multiple functions, including braking, steering, and lifting. Steering and braking require a continuous oil supply, while lifting requires a high-flow oil supply (non-continuous oil supply). Existing forklifts each have their own separate oil pumps and inlet valves for each module, such as braking, steering, and lifting. This increases the size of the forklift and increases manufacturing and maintenance costs.

[0030] See also Figures 1-4 In order to solve the problem that the existing forklift has too many liquid pumps and oil inlet valves, resulting in an excessively large forklift volume and high manufacturing and maintenance costs, the present application provides an integrated oil inlet valve group and a forklift. The integrated oil inlet valve group provided by the present application includes a main valve body 200, a monostable diverter valve 300, and a priority diverter valve 400. The monostable diverter valve 300 and the priority diverter valve 400 are both installed in the main valve body 200. The main valve body 200 is provided with a first oil inlet channel 210, a second oil inlet channel 220, a brake channel 230, a first control channel 241, a second control channel 242, a steering channel 260, and a feedback channel 270.

[0031] The first oil inlet channel 210 is connected to the brake channel 230 and the first control channel 241 through a monostable diverter valve 300. Pressurized oil enters the brake channel 230 and the first control channel 241 through the first oil inlet channel 210. The monostable diverter valve 300 ensures a continuous oil supply to the brake channel 230, ensuring a quick response of the forklift's brake device 130.

[0032] The second oil inlet channel 220 can be connected to the second control channel 242, the steering channel 260 and the feedback channel 270 respectively through the priority diverter valve 400. Because the forklift's multi-way valve 160 (including the lifting device) can also take in oil through the first control channel 241, the forklift's multi-way valve 160 can take in oil through both the first control channel 241 and the second control channel 242, ensuring that the forklift's multi-way valve 160 has sufficient oil intake, thereby ensuring that the forklift can successfully complete the lifting action. In addition, the second oil inlet channel 220 is constantly connected to the steering channel 260 through the priority diverter valve 400, thus ensuring that the forklift's steering device 150 can respond quickly. Pressurized oil can enter the priority diverter valve 400 through the feedback channel 270 to control the opening between the second oil inlet channel 220 and the second control channel 242 through the priority diverter valve 400. Thus, when the forklift's steering device 150 initiates steering, the feedback channel 270 reduces the opening between the second oil inlet channel 220 and the second control channel 242, thereby increasing the oil flow between the second oil inlet channel 220 and the steering channel 260, allowing the forklift to smoothly steer. Similarly, when the forklift does not need to steer, the feedback channel 270 increases the opening between the second oil inlet channel 220 and the second control channel 242, thereby increasing the oil flow between the second oil inlet channel 220 and the second control channel 242, allowing the forklift to smoothly complete the lifting action.

[0033] The integrated oil inlet valve assembly has only two oil inlet channels: the first oil inlet channel 210 and the second oil inlet channel 220. The brake channel 230 is supplied with oil only through the first oil inlet channel 210, the steering channel 260 and the feedback channel 270 are supplied with oil only through the second oil inlet channel 220, and the first control channel 241 and the second control channel 242 are supplied with oil through the first oil inlet channel 210 and the second oil inlet channel 220, respectively. This allows two pumps to supply oil to multiple modules of the forklift (including braking, feedback, lifting, and steering), reducing the number of pumps required and lowering the manufacturing and maintenance costs of the forklift. Furthermore, the single main valve body 200 allows oil supply to multiple modules of the forklift, making the forklift structure more compact and significantly reducing its size.

[0034] It should be noted that, in one embodiment, Figure 3As shown, the main valve body 200 is provided with a valve cavity 280. The priority diverter valve 400 includes a valve core 500 and a return spring 600. The valve core 500 is movably disposed within the valve cavity 280. The return spring 600 has one end connected to the inner wall of the valve cavity 280 and the other end connected to the valve core 500, thereby applying a force to the valve core 500 away from the return spring 600. The second oil inlet channel 220 can communicate with the second control channel 242 through the valve cavity 280. The valve core 500 is movably disposed within the valve cavity 280 to control the opening between the second control channel 242 and the second oil inlet channel 220.

[0035] Further, if Figure 3 As shown, the valve core 500 is provided with a multi-way cavity 510 and a first through-hole 520, a second through-hole 530, a third through-hole 540, and a fourth through-hole 550, respectively communicating with the multi-way cavity 510. The second oil inlet channel 220 communicates with the first through-hole 520. The pressurized oil in the second oil inlet channel 220 is constantly communicated with the steering channel 260 through the first through-hole 520, the multi-way cavity 510, and the second through-hole 530. Furthermore, the valve core 500 isolates the valve cavity 280, forming a hydraulic cavity 281 at one end of the valve cavity 280 away from the return spring 600. The hydraulic cavity 281 communicates with the multi-way cavity 510 via the fourth through-hole 550, and the multi-way cavity 510 communicates with the feedback channel 270 via the third through-hole 540. Specifically, when the forklift turns, the hydraulic pressure in the feedback channel 270 increases, and the pressure oil enters the valve chamber 280 where the return spring 600 is located from the feedback channel 270. The thrust on the side of the valve core 500 close to the return spring 600 increases, and the balance force on the valve core 500 is broken. The pressure oil and the return spring 600 jointly push the valve core 500 to move in the direction away from the return spring 600, and the valve core 500 gradually reduces the opening of the second control channel 242, thereby reducing the flow rate of the second control channel 242 and increasing the flow rate of the steering channel 260, so as to facilitate the steering device 150 of the forklift to complete the steering. When the forklift is not turning, the hydraulic pressure in the feedback channel 270 decreases, and the balance force on the valve core 500 is broken again. The pressurized oil enters the hydraulic chamber 281 from the multi-channel chamber 510 through the fourth through hole 550 and pushes the valve core 500 toward the end close to the return spring 600. At this time, the valve core 500 gradually increases the opening of the second control channel 242, thereby increasing the flow rate of the second control channel 242, so that the lifting device of the forklift can complete the lifting action.

[0036] In order to improve the safety of the integrated oil inlet valve group and avoid the hydraulic pressure of the pressure oil in the feedback channel 270 being too high, in one embodiment, as shown in FIG. Figure 3 and Figure 4As shown, the integrated oil inlet valve assembly further includes a first safety valve 710. The main valve body 200 is further provided with an oil return channel 290. The feedback channel 270 can be connected to the oil return channel 290 through the first safety valve 710. Thus, when the hydraulic pressure of the pressurized oil in the feedback channel 270 exceeds a preset pressure value, the pressurized oil returns to open the first safety valve 710 and flows back through the first safety valve 710, effectively ensuring the safety of the forklift.

[0037] The pressure oil in the first control channel 241 and the second control channel 242 flows to the multi-way valve 160 of the forklift. Therefore, in order to reduce the number of oil inlets of the multi-way valve 160 and thus reduce the complexity of the forklift structure, in one embodiment, as shown in FIG. Figure 3 and Figure 4 As shown, the main valve body 200 is further provided with a collecting channel 250, and the first control channel 241 and the second control channel 242 are respectively connected to the collecting channel 250. In this way, the pressure oil entering the first control channel 241 and the second control channel 242 is collected in the collecting channel 250 and enters the multi-way valve 160.

[0038] Similarly, in order to improve the safety of the integrated oil inlet valve group and avoid excessive hydraulic pressure of the pressure oil in the manifold channel 250, in one embodiment, as shown in FIG. Figure 3 and Figure 4 As shown, the integrated oil inlet valve assembly also includes a second safety valve 720. The main valve body 200 is also provided with an oil return channel 290. The collecting channel 250 can be connected to the oil return channel 290 through the second safety valve 720. In this way, when the hydraulic pressure of the pressurized oil in the collecting channel 250 exceeds a preset pressure value, the pressurized oil returns to open the second safety valve 720 and flows back through the second safety valve 720, effectively ensuring the safety of the forklift.

[0039] Specifically, in order to reduce the production cost of the forklift, in one embodiment, as Figure 2 and Figure 4 As shown, the integrated oil inlet valve assembly also includes a removable plug 800. The main valve body 200 also has an oil return channel 290. The removable plug 800 is installed between the collecting channel 250 and the oil return channel 290 to separate the collecting channel and the oil return channel. Typically, the removable plug 800 separates the collecting channel 250 and the oil return channel 290. When a solenoid valve is required between the collecting channel 250 and the oil return channel 290, the removable plug 800 can be replaced with a solenoid valve, which can significantly improve the control efficiency of the forklift.

[0040] In order to prevent the pressure oil in the steering channel 260 from flowing back, in one embodiment, as shown in FIG. Figure 3 and Figure 4As shown, the integrated oil inlet valve assembly further includes a one-way check valve 900, which is disposed in the steering channel 260 to allow one-way flow of pressurized oil from the end of the steering channel 260 proximal to the priority diverter valve 400 to the end distal to the priority diverter valve 400. Furthermore, to simplify installation of the one-way check valve 900, in one embodiment, the one-way check valve 900 is detachably connected to the main valve body 200. However, this is not limiting. To enhance the connection strength between the one-way check valve 900 and the main valve body 200, in other embodiments, the one-way check valve 900 may be fixedly connected to the main valve body 200.

[0041] Furthermore, in one embodiment, if Figure 3 As shown, the main valve body 200 is provided with an assembly hole 291, the inner wall of which is provided with an internal thread (not shown), and the one-way check valve 900 is provided with an external thread (not shown) that matches the internal thread. In this way, the one-way check valve 900 is threadedly connected to the main valve body 200, greatly improving the efficiency of disassembly and assembly of the one-way check valve 900.

[0042] See also Figure 4 The present application also provides a forklift truck, comprising a first liquid pump 110, a second liquid pump 120, a brake device 130, a feedback device 140, a steering device 150, a multi-way valve 160, and an integrated oil inlet valve assembly as described in any of the above embodiments. The first liquid pump 110 is connected to a first oil inlet channel 210, the second liquid pump 120 is connected to a second oil inlet channel 220, the brake device 130 is connected to a brake channel 230, the feedback device 140 is connected to a feedback channel 270, the steering device 150 is connected to a steering channel 260, and the multi-way valve 160 is connected to a first control channel 241 and a second control channel 242. The forklift truck further comprises an oil return device 170, which is connected to an oil return channel 290.

[0043] Typically, the pressure oil required by the steering device 150 and the lifting device of the forklift is much greater than the pressure oil required by the brake device 130 of the forklift. In order to reasonably distribute the pressure oil and improve the operating efficiency of the forklift, in one embodiment, the displacement of the second liquid pump 120 is greater than the displacement of the first liquid pump 110.

[0044] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. An integrated oil inlet valve group, characterized in that: The invention comprises a main valve body (200), a monostable diverter valve (300) and a priority diverter valve (400), wherein the monostable diverter valve (300) and the priority diverter valve (400) are both installed on the main valve body (200), and the main valve body (200) is provided with a first oil inlet channel (210), a second oil inlet channel (220), a brake channel (230), a first control channel (241), a second control channel (242), a steering channel (260) and a feedback channel (270); the first oil inlet channel (210) is connected to the brake channel (230) and the first control channel (241) through the monostable diverter valve (300). a control channel (241); the second oil inlet channel (220) can be respectively connected to the second control channel (242), the steering channel (260) and the feedback channel (270) through the priority diverter valve (400); the second oil inlet channel (220) is constantly connected to the steering channel (260) through the priority diverter valve (400); pressurized oil can enter the priority diverter valve (400) through the feedback channel (270) to control the opening between the second oil inlet channel (220) and the second control channel (242) through the priority diverter valve (400); The main valve body (200) is provided with a valve cavity (280), and the priority diverter valve (400) includes a valve core (500) and a return spring (600), wherein the valve core (500) is movably arranged in the valve cavity (280), and one end of the return spring (600) is connected to the inner wall of the valve cavity (280), and the other end is connected to the valve core (500) to apply a force to the valve core (500) away from the return spring (600); the second oil inlet channel (220) can be connected to the second control channel (242) through the valve cavity (280), and the valve core (500) is movably arranged in the valve cavity (280) to control the opening between the second control channel (242) and the second oil inlet channel (220); The valve core (500) is provided with a multi-pass cavity (510) and a first through hole (520), a second through hole (530), a third through hole (540) and a fourth through hole (550) respectively connected to the multi-pass cavity (510); the second oil inlet channel (220) is connected to the first through hole (520), and the pressure oil in the second oil inlet channel (220) is constantly connected to the steering channel (260) through the first through hole (520), the multi-pass cavity (510) and the second through hole (530); and the valve core (500) blocks the valve cavity (280) so that the end of the valve cavity (280) away from the return spring (600) forms a hydraulic cavity (281), the hydraulic cavity (281) is connected to the multi-pass cavity (510) through the fourth through hole (550), and the multi-pass cavity (510) is connected to the feedback channel (270) through the third through hole (540); When the forklift turns, the hydraulic pressure in the feedback channel (270) increases, and the pressure oil enters the valve chamber (280) where the return spring (600) is located from the feedback channel (270). The thrust on the valve core (500) close to the return spring (600) increases, and the balance force on the valve core (500) is broken. The pressure oil and the return spring (600) jointly push the valve core (500) to move in a direction away from the return spring (600), and the valve core (500) gradually reduces the opening of the second control channel (242), thereby reducing the flow rate of the second control channel (242) and increasing the flow rate of the steering channel (260), so that the steering device (150) of the forklift completes the steering; When the forklift does not turn, the hydraulic pressure in the feedback channel (270) decreases, the balance force on the valve core (500) is broken again, and the pressurized oil enters the hydraulic chamber (281) from the multi-channel chamber (510) through the fourth through hole (550) and pushes the valve core (500) to move toward the end close to the return spring (600). In addition, the valve core (500) gradually increases the opening of the second control channel (242), thereby increasing the flow rate of the second control channel (242), so that the lifting device of the forklift completes the lifting action.

2. The integrated oil inlet valve group according to claim 1, characterized in that: The integrated oil inlet valve group further includes a first safety valve (710), and the main valve body (200) is further provided with an oil return channel (290). The feedback channel (270) can be connected to the oil return channel (290) through the first safety valve (710).

3. The integrated oil inlet valve group according to claim 1, characterized in that: The main valve body (200) is further provided with a collecting channel (250), and the first control channel (241) and the second control channel (242) are respectively connected to the collecting channel (250).

4. The integrated oil inlet valve group according to claim 3, characterized in that: The integrated oil inlet valve group further includes a second safety valve (720), and the main valve body (200) is further provided with an oil return channel (290). The collecting channel (250) can be connected to the oil return channel (290) through the second safety valve (720).

5. The integrated oil inlet valve group according to claim 3, characterized in that: The integrated oil inlet valve group further includes a detachable plug (800), and the main valve body (200) is further provided with an oil return channel (290). The detachable plug (800) is arranged between the collecting channel (250) and the oil return channel (290) to separate the collecting channel (250) and the oil return channel (290).

6. The integrated oil inlet valve group according to claim 1, characterized in that: The integrated oil inlet valve group further comprises a one-way check valve (900), which is arranged in the steering channel (260) to allow pressure oil to flow in one direction from one end of the steering channel (260) close to the priority diverter valve (400) to the other end away from the priority diverter valve (400).

7. The integrated oil inlet valve group according to claim 6, characterized in that: The one-way check valve (900) is detachably connected to the main valve body (200).

8. The integrated oil inlet valve group according to claim 7, characterized in that: The main valve body (200) is provided with an assembly hole (291), the inner wall of the assembly hole (291) is provided with an internal thread, and the one-way check valve (900) is provided with an external thread that matches the internal thread.

9. A forklift, characterized in that: The invention comprises a first liquid pump (110), a second liquid pump (120), a braking device (130), a feedback device (140), a steering device (150), a multi-way valve (160), and an integrated oil inlet valve group according to any one of claims 1 to 8, wherein the first liquid pump (110) is connected to the first oil inlet channel (210), the second liquid pump (120) is connected to the second oil inlet channel (220), the braking device (130) is connected to the braking channel (230), the feedback device (140) is connected to the feedback channel (270), the steering device (150) is connected to the steering channel (260), and the multi-way valve (160) is connected to the first control channel (241) and the second control channel (242).

10. The forklift according to claim 9, characterized in that The displacement of the second liquid pump (120) is greater than the displacement of the first liquid pump (110).

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