A hydraulic system

Abstract

This utility model discloses a hydraulic system, specifically relating to the field of hydraulic system technology, including a hydraulic cover plate assembly, a return hose, and a suction hose. The hydraulic cover plate assembly includes: a cover plate body; a filler pipe fixedly installed on the cover plate body, with a filler cap fixedly installed at the top of the filler pipe; a suction steel pipe fixedly installed on the cover plate body, with a suction filter fixedly installed at one end of the suction steel pipe and the other end of the suction steel pipe fixedly connected to one end of the suction hose; and a return steel pipe fixedly installed on the cover plate body, with a return oil filter fixedly installed at one end of the return steel pipe and the other end of the return steel pipe fixedly connected to one end of the return hose. This utility model integrates the suction steel pipe and the return steel pipe onto the cover plate body of the hydraulic cover plate assembly, enabling the hydraulic cover plate assembly to perform both suction, return, and filtration functions. When welded together, it improves manufacturability, assemblability, and ease of maintenance.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic system technology, and more specifically, to a hydraulic system. Background Technology

[0002] It is known that a forklift chassis is equipped with an engine, a forklift intake system (including an air filter and intake pipe), and a forklift hydraulic system. The forklift hydraulic oil tank cover assembly is a crucial component of the forklift hydraulic system, and its functions are essential for its normal operation and maintenance. The existing forklift hydraulic system includes an oil tank, gear pump, multi-way valve, cylinders, and the forklift hydraulic oil tank cover assembly. The forklift hydraulic oil tank cover assembly includes a cover plate, a return oil pipe, and a suction oil pipe. The return oil pipe includes a main return oil pipe, a mast return oil pipe, and a steering return oil pipe. The existing cover plate uses round holes of varying sizes to install the filler pipe and the return oil pipe (as shown in the attached diagram). Figure 5 ); among which, as attached Figure 4 As shown, the oil suction pipe entering the oil tank is installed on the frame panel, so that the gear pump is connected to the oil suction pipe through the oil suction hose. The oil suction pipe draws oil from the oil tank, and then the gear pump uses vacuum to draw hydraulic oil from the oil tank, and then delivers it to the oil inlet of the multi-way valve through the high-pressure hose. The oil flowing out of the oil return port of the multi-way valve flows back to the oil tank through the oil return hose and the oil return steel pipe (connected to the oil return hose).

[0003] However, in actual use, the space between the engine, frame, air filter, and intake manifold is quite small (as shown in the attached diagram). Figure 4 As shown, the existing hydraulic circuit is not optimized, which interferes with the assembly of related components. For example, the oil suction filter installed at the end of the suction steel pipe needs to be pre-assembled in the vehicle frame oil tank, which makes assembly, use and maintenance inconvenient. Therefore, a hydraulic system is proposed as a further improvement. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the embodiments of this utility model provide a hydraulic system to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic system, including a hydraulic cover plate assembly located next to an air filter, a return oil hose fixedly connected to a multi-way valve, and a suction oil hose fixedly connected to a gear pump;

[0006] The hydraulic cover assembly includes:

[0007] The cover body is located next to the air filter;

[0008] A refueling pipe is fixedly installed on the cover plate body, and a refueling cap is fixedly installed at the top of the refueling pipe;

[0009] An oil suction steel pipe is fixedly installed on the cover plate body, and an oil suction filter is fixedly installed at one end of the oil suction steel pipe. The other end of the oil suction steel pipe is fixedly connected to one end of an oil suction hose.

[0010] The oil return steel pipe is fixedly installed on the cover plate body, and an oil return filter is fixedly installed at one end of the oil return steel pipe. The other end of the oil return steel pipe is fixedly connected to one end of the oil return hose.

[0011] Furthermore, a first mounting hole is provided on the cover plate body near the air filter, and the oil suction steel pipe is fixedly installed at the first mounting hole.

[0012] Furthermore, a second mounting hole is provided on the cover plate body away from the air filter, and the oil return steel pipe is fixedly installed at the second mounting hole.

[0013] Furthermore, a third mounting hole is provided on the cover plate body near the second mounting hole, and the refueling pipe is fixedly installed in the third mounting hole.

[0014] Furthermore, the distance between the refueling pipe inlet and the surface of the cover plate body is set to 40-60mm.

[0015] Furthermore, a gantry return oil pipe and a steering return oil pipe are fixedly installed on the cover plate body, and the gantry return oil pipe and the steering return oil pipe are close to the second mounting hole and the third mounting hole.

[0016] The technical effects and advantages of this utility model are as follows:

[0017] 1. Compared with existing technologies, by installing an oil suction pipe on the cover plate body, and with an oil suction filter installed at the end of the pipe, the hydraulic cover plate assembly also has oil suction and filtration functions. Furthermore, by installing a return oil pipe on the cover plate body, and with an oil return filter installed at the end of the pipe, the hydraulic cover plate assembly also has an oil return and filtration function. Therefore, the hydraulic cover plate assembly combines oil suction, return, and filtration functions. When welded together, it improves manufacturability, assemblability, and ease of maintenance. This addresses the issue of limited space between the engine, frame, air filter, and intake manifold (as shown in the attached diagram). Figure 4 As shown in the figure, the oil suction pipe and oil suction filter are combined with the cover plate body, eliminating the need for pre-assembly (the oil suction filter needs to be pre-assembled in the vehicle frame oil tank), thus solving the problem of inconvenient assembly, use and maintenance.

[0018] 2. To facilitate quick and easy assembly of the refueling cap, it is necessary to reduce the distance between the conventional refueling pipe inlet and the surface of the cap body. To facilitate observation during maintenance, the shape and position of the return oil pipe are optimized so that it does not cover the gantry return oil pipe and the steering return oil pipe, thus avoiding the return oil pipe obstructing the gantry return oil pipe and the steering return oil pipe. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] Figure 2 This is a schematic diagram of the hydraulic cover assembly of this utility model mounted on the vehicle frame.

[0021] Figure 3 This is a schematic diagram of the frame structure of this utility model.

[0022] Figure 4 This is a schematic diagram of the existing hydraulic cover assembly mounted on the vehicle frame.

[0023] Figure 5 This is a schematic diagram of the existing hydraulic cover plate assembly.

[0024] The attached figures are labeled as follows: 100, hydraulic cover assembly; 110, cover body; 111, first mounting hole; 112, second mounting hole; 113, third mounting hole; 120, filler pipe; 130, filler cap; 140, suction pipe; 150, suction filter; 160, return pipe; 170, return filter; 180, mast return pipe; 190, steering return pipe; 200, return hose; 300, suction hose; 400, air filter; 500, multi-way valve; 600, gear pump; 700, frame; 710, oblong mounting hole. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0026] As attached Figure 1 Appendix Figure 2 and attached Figure 3 The hydraulic system shown includes a hydraulic cover assembly 100 located next to an air filter 400, a return hose 200 fixedly connected to a multi-way valve 500, and a suction hose 300 fixedly connected to a gear pump 600.

[0027] Among them, the waist-shaped mounting hole 710 on the frame 700 can install and remove the hydraulic cover assembly 100, improving the overall assemblability; the hydraulic cover assembly 100 adopts an anti-splash design, and improves the sealing performance through components such as sealing gaskets to prevent hydraulic oil from splashing out.

[0028] The hydraulic cover assembly 100 includes:

[0029] A cover body 110 is installed at the opening on the top of the fuel tank and is located next to the air filter 400.

[0030] A refueling pipe 120 is fixedly installed on the cover plate body 110, and a refueling cap 130 is fixedly installed at the top of the refueling pipe 120.

[0031] Oil suction steel pipe 140 is fixedly installed on cover plate body 110, and one end of oil suction steel pipe 140 is fixedly installed with oil suction filter 150 located in oil tank, and the other end of oil suction steel pipe 140 is fixedly connected to one end of oil suction hose 300.

[0032] The oil return steel pipe 160 is fixedly installed on the cover plate body 110, and one end of the oil return steel pipe 160 is fixedly installed with an oil return filter 170 located in the oil tank. The other end of the oil return steel pipe 160 is fixedly connected to one end of the oil return hose 200.

[0033] Among them, as attached Figure 4 As shown, the existing frame 700 has an oil suction pipe 140 welded to its side panel. The oil suction filter 150 needs to be pre-assembled inside the frame 700's oil tank so that the oil suction pipe 140 can connect to the oil suction filter 150 to achieve oil suction and filtration. The present invention, as shown in the attached diagram... Figure 1 As shown, the cover body 110 is equipped with an oil suction pipe 140, and an oil suction filter 150 is installed at the end of the oil suction pipe 140, so that the hydraulic cover assembly 100 also has the function of oil suction and oil filtration. Utilizing the oil return pipe 160 installed on the cover body 110, and the oil return filter 170 installed at the end of the oil return pipe 160, the hydraulic cover assembly 100 also has the function of oil return and oil filtration. Therefore, the hydraulic cover assembly 100 combines the functions of oil suction, oil return, and oil filtration. When welded together, it improves manufacturability, assemblability, and ease of later maintenance. Regarding the limited space between the engine, frame 700, air filter 400, and intake manifold, see attached... Figure 4 As shown, the oil suction pipe 140 and the oil suction filter 150 are combined with the cover plate body 110 without the need for pre-assembly (the oil suction filter 150 needs to be pre-assembled in the fuel tank of the frame 700), thus solving the problem of inconvenient assembly, use and maintenance.

[0034] In a preferred embodiment, as shown in the appendix Figure 1 Appendix Figure 2 and attached Figure 3 As shown, the cover plate body 110 has a first mounting hole 111 near the air filter 400, and the oil suction steel pipe 140 is fixedly installed in the first mounting hole 111; so as to facilitate the connection between the oil suction steel pipe 140 installed on the cover plate body 110 and the oil suction hose 300, and reduce the influence of the engine, frame 700, air filter 400 and intake pipe.

[0035] In a preferred embodiment, as shown in the appendix Figure 1 Appendix Figure 2 and attached Figure 3 As shown, a second mounting hole 112 is provided on the cover plate body 110 away from the air filter 400, and the oil return steel pipe 160 is fixedly installed in the second mounting hole 112; so that the oil return steel pipe 160 installed on the cover plate body 110 is away from the influence of the air filter 400.

[0036] In a preferred embodiment, as shown in the appendix Figure 1 Appendix Figure 2 and attached Figure 3 As shown, a third mounting hole 113 is provided on the cover plate body 110 near the second mounting hole 112, and the oil filling pipe 120 is fixedly installed in the third mounting hole 113; so that the oil filling pipe 120 installed on the cover plate body 110 is kept away from the influence of the air filter 400.

[0037] In a preferred embodiment, as shown in the appendix Figure 1 Appendix Figure 2 and attached Figure 3 As shown, the distance between the filler port of the filler pipe 120 and the surface of the cover plate body 110 is set to 40-60mm.

[0038] Specifically, when the distance between the filler port of the filler pipe 120 and the surface of the cover plate body 110 reaches 80mm, the assembly of the filler cap 130 will be affected by the air filter 400. When the distance between the filler port of the filler pipe 120 and the surface of the cover plate body 110 is less than 40mm, the anti-pollution and sealing performance of the filler pipe 120 is weak. Therefore, in order to make the assembly of the filler cap 130 quick and convenient, it is necessary to reduce the distance between the filler port of the conventional filler pipe 120 and the surface of the cover plate body 110, for example, reducing the distance between the filler port of the original filler pipe 120 and the surface of the cover plate body 110 from 80mm to 60mm.

[0039] In a preferred embodiment, as shown in the appendix Figure 1 and attached Figure 5 As shown, a mast return oil pipe 180 and a steering return oil pipe 190 are fixedly installed on the cover plate body 110. The mast return oil pipe 180 and the steering return oil pipe 190 are close to the second mounting hole 112 and the third mounting hole 113.

[0040] Among them, the shape and position of the return oil pipe 160 are optimized so that it does not cover the gantry return oil pipe 180 and the steering return oil pipe 190, thus avoiding the return oil pipe 160 from obstructing the gantry return oil pipe 180 and the steering return oil pipe 190.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic system comprising a hydraulic cover assembly (100) located next to an air filter, a return hose (200) fixedly connected to a multi-way valve, and a suction hose (300) fixedly connected to a gear pump; characterized in that, The hydraulic cover assembly (100) includes: The cover body (110) is located next to the air filter; A refueling pipe (120) is fixedly installed on the cover plate body (110), and a refueling cap (130) is fixedly installed at the top end of the refueling pipe (120). An oil suction pipe (140) is fixedly installed on the cover plate body (110), and an oil suction filter (150) is fixedly installed at one end of the oil suction pipe (140), and the other end of the oil suction pipe (140) is fixedly connected to one end of the oil suction hose (300). The oil return steel pipe (160) is fixedly installed on the cover plate body (110), and an oil return filter (170) is fixedly installed at one end of the oil return steel pipe (160), and the other end of the oil return steel pipe (160) is fixedly connected to one end of the oil return hose (200).

2. A hydraulic system according to claim 1, characterized in that: The cover plate body (110) has a first mounting hole (111) near the air filter, and the oil suction steel pipe (140) is fixedly installed in the first mounting hole (111).

3. A hydraulic system according to claim 2, characterized in that: The cover plate body (110) has a second mounting hole (112) located away from the air filter, and the oil return steel pipe (160) is fixedly installed at the second mounting hole (112).

4. A hydraulic system according to claim 3, characterized in that: The cover plate body (110) has a third mounting hole (113) near the second mounting hole (112), and the refueling pipe (120) is fixedly installed in the third mounting hole (113).

5. A hydraulic system according to claim 4, characterized in that: The distance between the filling port of the filling pipe (120) and the surface of the cover plate body (110) is set to 40-60mm.

6. A hydraulic system according to claim 5, characterized in that: The gantry return oil pipe (180) and the steering return oil pipe (190) are fixedly installed on the cover plate body (110). The gantry return oil pipe (180) and the steering return oil pipe (190) are close to the second mounting hole (112) and the third mounting hole (113).

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