Hydraulic system tank structure

By designing a hydraulic system tank structure that includes a return oil chamber, a sedimentation chamber, and a heat dissipation section, the problems of complex oil circuits and high leakage risks in existing technologies are solved. This achieves autonomous heat dissipation and impurity sedimentation, simplifies the oil circuit structure, and improves safety.

CN115929706BActive Publication Date: 2025-10-21XUZHOU SANJIANG HYDRAULIC PRESSURE EQUIP CO LTD
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Patent Information

Application Number
CN202211698819.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2022-12-28
Publication Date
2025-10-21
Estimated Expiration
2042-12-28

AI Technical Summary

Technical Problem

Existing hydraulic systems require additional devices for heat dissipation and impurity settling in the oil tank, resulting in a cumbersome and complex oil circuit structure and a high risk of leakage.

Method used

Design a hydraulic system oil tank structure, comprising a first tank and a second tank, which are used for oil return and impurity removal and oil supply and heat dissipation, respectively. The tank is equipped with an oil return chamber, a sedimentation chamber, an oil storage chamber, a connecting chamber, a heat dissipation section and an oil supply chamber. Self-heating and impurity sedimentation are achieved through connecting pipes and oil passage pipes, simplifying the oil circuit structure.

Benefits of technology

It realizes the autonomous heat dissipation and impurity precipitation of the oil, simplifies the oil circuit structure, and improves the safety and stability of the hydraulic system.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a hydraulic system oil tank structure, which comprises a first tank body, a second tank body, a communication pipe and an oil passing pipe, the first tank body is used for removing impurities and storing the oil return of a hydraulic system, a return oil chamber, a sedimentation chamber and an oil storage chamber are arranged in the first tank body and are in communication with each other, the return oil chamber is in communication with an oil return pipe and the communication pipe of the hydraulic system respectively, the oil storage chamber is in communication with the oil passing pipe, the second tank body is used for heat dissipation of hydraulic oil and oil supply for the hydraulic system, the second tank body comprises a communication chamber, a heat dissipation part and an oil supply chamber, the communication chamber is in communication with the oil passing pipe, the heat dissipation part is provided with an oil passing through hole, and the oil supply chamber is in communication with an oil supply pipe and the communication pipe of the hydraulic system respectively. The hydraulic system oil tank structure can complete the heat dissipation of oil, the deposition of impurities and the like through the structure, can simplify the oil path structure of the oil supply mechanism of the hydraulic system, and can improve the safety of the hydraulic system oil supply mechanism in use.
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Description

Technical Field

[0001] The present application relates to the technical field of hydraulic oil supply, and in particular to an oil tank structure of a hydraulic system. Background Art

[0002] The hydraulic system tank (hydraulic oil tank) is a container used to store the oil required to ensure the operation of the hydraulic system. When the hydraulic system is working, the oil needs to be treated to dissipate heat, precipitate impurities, and allow air in the oil to escape.

[0003] In the prior art, hydraulic system oil tanks are often used simply as containers, requiring additional equipment to dissipate heat and precipitate impurities from the oil. This results in a complex oil supply circuit structure and numerous connection points within the hydraulic system, leading to a high risk of oil leakage. Summary of the Invention

[0004] The present application aims to solve one of the technical problems in the above-mentioned technology at least to a certain extent.

[0005] To this end, one purpose of this application is to propose a hydraulic system oil tank structure that can dissipate heat and precipitate impurities in the oil through its own structure, simplify the oil circuit structure of the hydraulic system's oil supply mechanism, and improve the safety of the hydraulic system's oil supply mechanism during use.

[0006] To achieve the above-mentioned purpose, the first embodiment of the present application proposes a hydraulic system oil tank structure, comprising: a first tank body, a second tank body, a connecting pipe and an oil pipe, wherein:

[0007] The first box body is used to remove impurities and store the return oil of the hydraulic system. The first box body is provided with an oil return chamber, a sedimentation chamber and an oil storage chamber, wherein the oil return chamber, the sedimentation chamber and the oil storage chamber are connected to each other; the oil return chamber is respectively connected to the return oil pipe and the connecting pipe of the hydraulic system; the oil storage chamber is connected to the oil through pipe.

[0008] The second box body is used to dissipate heat of the hydraulic oil and supply oil to the hydraulic system. The second box body includes a connecting chamber, a heat dissipation part and an oil supply chamber, wherein the connecting chamber is connected to the oil pipe; the heat dissipation part is provided with an oil through hole, one end of the oil through hole is connected to the connecting chamber, and the other end of the oil through hole is connected to the oil supply chamber; the oil supply chamber is respectively connected to the oil supply pipe of the hydraulic system and the connecting pipe.

[0009] One end of the connecting pipe is connected to the oil supply chamber, and the other end of the connecting pipe is connected to the oil return chamber, and a one-way valve is provided on the connecting pipe; one end of the oil passing pipe is connected to the oil storage chamber, and the other end of the oil passing pipe is connected to the connecting chamber, and a pressure differential valve is provided on the oil passing pipe.

[0010] The hydraulic system oil tank structure of the embodiment of the present application can complete the heat dissipation and impurity precipitation of the oil through its own structure, can simplify the oil circuit structure of the oil supply mechanism of the hydraulic system, and can also improve the safety of the oil supply mechanism of the hydraulic system during use.

[0011] In addition, the hydraulic system oil tank structure proposed in the above embodiment of the present application may also have the following additional technical features:

[0012] In one embodiment of the present application, an exhaust valve is provided on the first box body.

[0013] In one embodiment of the present application, an oil return baffle and a sedimentation baffle are provided in the first box body, wherein the oil return baffle and the first box body together constitute the oil return chamber, the two sides and the top of the oil return baffle are respectively connected to the first box body, and a bottom partition is provided between the bottom of the oil return baffle and the first box body; the sedimentation baffle, the oil return baffle and the first box body together constitute the sedimentation chamber, the two sides and the bottom of the sedimentation baffle are respectively connected to the first box body, and a top partition is provided between the top of the sedimentation baffle and the first box body; the oil return chamber and the sedimentation chamber are communicated through the bottom partition; the sedimentation chamber and the oil storage chamber are communicated through the top partition.

[0014] In one embodiment of the present application, an oil return filter is provided between the oil return baffle and the first housing, and edges of the oil return filter are connected to the oil return baffle and the first housing, respectively.

[0015] In one embodiment of the present application, the heat dissipation portion includes a plurality of heat dissipation plates, a plurality of oil through holes are provided, and the plurality of oil through holes are respectively provided on the plurality of heat dissipation plates.

[0016] In one embodiment of the present application, multiple groups of heat dissipation plates are arranged at intervals.

[0017] In one embodiment of the present application, the heat dissipation plate includes a plurality of groups of heat dissipation bars, and the plurality of groups of heat dissipation bars are arranged at intervals to form the heat dissipation plate.

[0018] In one embodiment of the present application, one end of the connecting pipe is located near the top of the oil supply chamber, and the other end of the connecting pipe is located near the top of the oil return chamber.

[0019] In one embodiment of the present application, one end of the oil passage pipe is located near the bottom of the oil storage chamber, and the other end of the oil passage pipe is located near the top of the communication chamber.

[0020] In one embodiment of the present application, the first box body is located above the second box body, and the first box body and the second box body are an integrated structure.

[0021] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0023] Figure 1 This is a schematic structural diagram of a hydraulic system oil tank structure according to one embodiment of the present application;

[0024] Figure 2 This is a structural diagram of a hydraulic system oil tank structure according to another embodiment of the present application;

[0025] Figure 3 This is a structural diagram of a hydraulic system oil tank structure according to another embodiment of the present application;

[0026] Figure 4 This is a structural schematic diagram of a hydraulic system oil tank structure according to another embodiment of the present application.

[0027] Figure numerals: 100, first box body; 101, return oil pipe; 102, exhaust valve; 110, return oil chamber; 111, return oil baffle; 112, return oil filter; 120, sedimentation chamber; 121, sedimentation baffle; 130, oil storage chamber; 200, second box body; 201, oil supply pipe; 210, connecting chamber; 220, heat dissipation part; 221, heat dissipation plate; 222, oil through hole; 223, heat dissipation strip; 230, oil supply chamber; 300, connecting pipe; 310, one-way valve; 400, oil pipe; 410, differential pressure valve. DETAILED DESCRIPTION

[0028] The following describes in detail embodiments of the present application, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0029] The hydraulic system oil tank structure of an embodiment of the present application is described below with reference to the accompanying drawings.

[0030] The hydraulic system oil tank structure provided in the embodiment of the present application can be used in the hydraulic system to store oil in the hydraulic system, as well as to dissipate heat and precipitate impurities in the oil.

[0031] like Figure 1 and Figure 2 As shown, the hydraulic system oil tank structure of the embodiment of the present application may include a first tank body 100 , a second tank body 200 , a connecting pipe 300 and an oil pipe 400 .

[0032] The first tank 100 is used to remove impurities and store the hydraulic system's return oil. It contains an oil return chamber 110, a settling chamber 120, and an oil storage chamber 130. These chambers are interconnected. The oil return chamber 110 is connected to the hydraulic system's return oil pipe 101 and connecting pipe 300, respectively, while the oil storage chamber 130 is connected to the oil transfer pipe 400.

[0033] Specifically, when the oil in the hydraulic system flows back, it can flow back to the oil return chamber 110 through the oil return pipe 101, and then flow into the oil storage chamber 130 through the sedimentation chamber 120 for temporary storage for use by the hydraulic system.

[0034] It is understandable that the returned oil will contain a certain amount of air. In order to prevent the air in the oil from being retained in the first box 100 and causing the flow rate of the oil between the various chambers in the first box 100 to increase, relevant professionals can set one or more exhaust valves 102 on the top of the first box 100 to allow the air in the oil to escape.

[0035] As a possible scenario, an exhaust valve 102 may be provided at the top of the oil return chamber 110 and the top of the oil storage chamber 130 , respectively.

[0036] In one embodiment of the present application, Figure 2 and Figure 3 As shown, an oil return baffle 111 and a settling baffle 121 are disposed within the first housing 100. The oil return baffle 111 and the first housing 100 together form the oil return chamber 110. The sides and top of the oil return baffle 111 are connected to the first housing 100, and a bottom partition is provided between the bottom of the oil return baffle 111 and the first housing 100. The settling baffle 121, the oil return baffle 111, and the first housing 100 together form the settling chamber 120. The sides and bottom of the settling baffle 121 are connected to the first housing 100, and a top partition is provided between the top of the settling baffle 121 and the first housing 100. The oil return chamber 110 and the settling chamber 120 are connected via the bottom partition, and the settling chamber 120 is connected to the oil storage chamber 130 via the top partition.

[0037] It should be noted that when the hydraulic system's oil returns through return oil pipe 101, it first flows back into return oil chamber 110. The return oil baffle 111 acts to reduce fluctuations in the returning oil, causing the oil to flow relatively slowly. The oil then flows through the bottom partition into settling chamber 120. The oil flows into settling chamber 120 at a relatively slow rate and then needs to flow over settling baffle 121 before flowing into oil storage chamber 130. Therefore, as the oil flows from settling chamber 120 to oil storage chamber 130, impurities in the oil settle within settling chamber 120, achieving the desired effect of settling impurities in the oil, thereby ensuring that the oil that flows over settling baffle 121 is relatively pure.

[0038] In addition, after the oil enters the oil return chamber 110, it first passes through the bottom interval and then the top interval during its flow process. Although this can slow down the flow rate of the oil, it can also make the oil go up and down, forming a "tumbling" effect. During the "tumbling" process, the part of the oil that contacts the air can continuously change, which is conducive to the overflow of air in the oil.

[0039] As a possible scenario, Figure 2 and Figure 3 As shown, an oil return filter 112 is provided between the oil return baffle 111 and the first housing 100 , and edges of the oil return filter 112 are connected to the oil return baffle 111 and the first housing 100 , respectively.

[0040] Specifically, the return oil filter 112 can filter the oil returning from the hydraulic system, and at the same time reduce the flow fluctuation of the oil, which has the characteristic of improving the oil purification effect of the present application, thereby making the oil entering the oil storage chamber 130 purer.

[0041] The second tank 200 is used to dissipate heat from the hydraulic oil and supply oil to the hydraulic system. It includes a communication chamber 210, a heat dissipation portion 220, and an oil supply chamber 230. The communication chamber 210 is connected to the oil pipe 400. The heat dissipation portion 220 is provided with an oil through-hole 222, one end of which is connected to the communication chamber 210, and the other end of the oil through-hole 222 is connected to the oil supply chamber 230. The oil supply chamber 230 is connected to the hydraulic system's oil supply pipe 201 and the communication pipe 300, respectively.

[0042] Specifically, the oil temporarily stored in the oil storage chamber 130 can flow into the communication chamber 210 through the oil pipe 400, and then flow into the oil supply chamber 230 through the heat dissipation portion 220, so as to be supplied to the hydraulic system through the oil supply pipe 201 for use at any time.

[0043] In one embodiment of the present application, Figure 3 and Figure 4As shown, the heat dissipation portion 220 includes a plurality of heat dissipation plates 221 , and a plurality of oil through holes 222 are provided. The plurality of oil through holes 222 are respectively provided on the plurality of heat dissipation plates 221 .

[0044] Specifically, by using multiple groups of heat dissipation plates 221 structures, the oil through-holes 222 through which the oil flows can be increased, that is, the amount of oil flowing through each oil through-hole 222 can be reduced, which is beneficial to improving the heat dissipation effect of the present application.

[0045] As a possible scenario, Figure 4 As shown, multiple groups of heat dissipation plates 221 are arranged at intervals.

[0046] Specifically, the structure in which multiple groups of heat dissipation plates 221 are arranged at intervals can increase the area of ​​contact between the heat dissipation plates 221 and the air, which is beneficial to improving the heat dissipation effect of the present application.

[0047] As another possible situation, Figure 4 As shown, the heat dissipation plate 221 includes a plurality of heat dissipation bars 223 , and the plurality of heat dissipation bars 223 are arranged at intervals to form the heat dissipation plate 221 .

[0048] Specifically, the heat dissipation bars 223 are arranged at intervals to form the heat dissipation plate 221, which can reduce the mutual influence between the heat dissipation bars 223 and make the air near the heat dissipation part 220 more easily circulate, which is beneficial to improving the heat dissipation effect of the present application.

[0049] One end of the communication pipe 300 is communicated with the oil supply chamber 230 , and the other end of the communication pipe 300 is communicated with the oil return chamber 110 . A one-way valve 310 is provided on the communication pipe 300 .

[0050] Specifically, the oil supply chamber 230 and the oil return chamber 110 are connected via a connecting pipe 300. When the pressure in the oil supply chamber 230 is high, oil can be discharged into the oil return chamber 110 to relieve the pressure within the oil supply chamber 230. This also allows air escaping from the oil in the oil supply chamber 230 to flow into the oil return chamber 110 and be discharged from there. A one-way valve 310 is provided on the connecting pipe 300 to prevent oil in the oil return chamber 110 from flowing into the oil supply chamber 230 without allowing impurities to settle and heat to dissipate, thereby ensuring greater stability in the operation of the device.

[0051] As a possible scenario, Figure 1 and Figure 3 As shown, one end of the connecting pipe 300 is located near the top of the oil supply chamber 230 , and the other end of the connecting pipe 300 is located near the top of the oil return chamber 110 .

[0052] Specifically, the connecting pipe 300 is respectively connected to the oil supply chamber 230 and the oil return chamber 110 near the top, which can facilitate the discharge of air escaping from the oil in the oil supply chamber 230, and can also allow the oil flowing from the oil supply chamber 230 to the oil return chamber 110 to precipitate impurities and dissipate heat again, so as to improve the use effect of the device.

[0053] One end of the oil pipe 400 is communicated with the oil storage chamber 130 , and the other end of the oil pipe 400 is communicated with the communication chamber 210 . A differential pressure valve 410 is provided on the oil pipe 400 .

[0054] Specifically, a pressure differential valve 410 is provided on the oil pipe 400, which can adjust the oil flow in the oil pipe 400 when the pressure between the oil storage chamber 130 and the connecting chamber 210 suddenly changes, so as to avoid sudden changes in the oil flow rate between each chamber, which may affect the overall use effect of this application.

[0055] As a possible scenario, Figure 2 As shown, one end of the oil pipe 400 is located near the bottom of the oil storage chamber 130 , and the other end of the oil pipe 400 is located near the top of the communication chamber 210 .

[0056] Specifically, the oil pipe 400 is connected to the oil storage chamber 130 near the bottom, which can facilitate the outflow of oil in the oil storage chamber 130, and the oil pipe 400 is connected to the connecting chamber 210 near the top, which can facilitate the oil in the oil pipe 400 to flow into the connecting chamber 210, which can increase the fluidity of the oil during use, thereby improving the use effect of the device.

[0057] In one embodiment of the present application, Figure 1 As shown, the first box body 100 is located above the second box body 200 .

[0058] Specifically, the first box body 100 is arranged above the second box body 200, so that a certain pressure difference can always be maintained between the oil in the oil storage chamber 130 and the oil in the connecting chamber 210, so that the oil in the oil storage chamber 130 can flow more easily into the connecting chamber 210, thereby making it possible to always maintain a certain amount of oil in the oil supply chamber 230 connected to the connecting chamber 210, so that the hydraulic system can use it at any time.

[0059] It should be noted that oil has a lower density at higher temperatures. Therefore, the present invention first filters and settles impurities in the oil returning from the hydraulic system before performing heat dissipation and cooling. This allows impurities in the oil to settle more easily, thereby improving the oil impurity precipitation effect of the present invention. Furthermore, because oil can absorb less gas at higher temperatures, the present invention's subsequent heat dissipation and cooling structure also facilitates the escape of gas from the oil.

[0060] As a possible situation, the first box body 100 and the second box body 200 can be made into an integrated structure.

[0061] Specifically, the hydraulic system oil tank structure of the embodiment of the present application adopts an integrated structure, which can reduce the number of connection points between the various chambers of the present application, make the structure simpler, and facilitate transportation and installation.

[0062] When using the hydraulic system oil tank structure of the embodiment of the present application, a professional will connect the return oil chamber 110 to the hydraulic system's return oil pipe 101, and the supply oil chamber 230 to the hydraulic system's supply oil pipe 201. When the hydraulic system needs oil, the supply pump draws oil from the supply oil chamber 230. When the hydraulic system needs to drain oil, the return oil pipe 101 drains the oil into the return oil chamber 110. When the hydraulic system needs to replenish oil, oil can also be added directly to the return oil chamber 110.

[0063] Oil returning from the hydraulic system is first filtered through return filter 112 before entering return chamber 110, where its flow rate is slowed by the return baffle. The oil then flows through the bottom plate into settling chamber 120, where impurities are deposited by settling baffle 121, while the oil flows into reservoir 130.

[0064] Next, the oil in the oil storage chamber 130 passes through the oil pipe 400 and flows into the connecting chamber 210 under the action of the oil pressure difference, and then enters the heat dissipation part 220 for heat dissipation and cooling. The oil after heat dissipation and cooling enters the oil supply chamber 230 so that the hydraulic system can be used at any time.

[0065] In summary, the hydraulic system oil tank structure proposed in the embodiment of the present application can perform tasks such as heat dissipation and impurity precipitation of the oil without connecting to other auxiliary equipment when in use. Moreover, as long as the hydraulic system works normally, it can drive the various tasks of the present application to proceed without generating unnecessary energy consumption, that is, various functions can be operated without the need for power equipment. It has the characteristics of simple structure, few connection points and low risk of oil leakage.

[0066] Therefore, the hydraulic system oil tank structure of the embodiment of the present application can complete the heat dissipation and impurity precipitation of the oil through its own structure, can simplify the oil circuit structure of the hydraulic system's oil supply mechanism, and can also improve the safety of the hydraulic system's oil supply mechanism during use.

[0067] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0069] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A hydraulic system oil tank structure, characterized in that: include: The first tank, the second tank, the connecting pipe and the oil pipe, wherein: The first box is used to remove impurities and store the return oil of the hydraulic system. The first box is provided with an oil return chamber, a sedimentation chamber and an oil storage chamber, wherein: The oil return chamber, the sedimentation chamber and the oil storage chamber are communicated with each other; The oil return chamber is communicated with the oil return pipe of the hydraulic system and the communicating pipe respectively; The oil storage chamber is communicated with the oil pipe; The second box is used to dissipate heat from the hydraulic oil and supply oil to the hydraulic system. The second box includes a communication chamber, a heat dissipation portion, and an oil supply chamber, wherein: The communication chamber is communicated with the oil pipe; The heat dissipation portion is provided with an oil through hole, one end of the oil through hole is communicated with the communication chamber, and the other end of the oil through hole is communicated with the oil supply chamber; The oil supply chamber is communicated with the oil supply pipe of the hydraulic system and the communicating pipe respectively; One end of the communicating pipe is in communication with the oil supply chamber, and the other end of the communicating pipe is in communication with the oil return chamber, and a one-way valve is provided on the communicating pipe; One end of the oil pipe is connected to the oil storage chamber, and the other end of the oil pipe is connected to the communication chamber. A pressure differential valve is provided on the oil pipe. The first box is provided with an oil return partition and a sedimentation partition, wherein: The oil return baffle and the first box body together form the oil return chamber, both sides and the top of the oil return baffle are respectively connected to the first box body, and a bottom spacer is provided between the bottom of the oil return baffle and the first box body; The sedimentation partition, the oil return partition and the first box together form the sedimentation chamber, the two sides and the bottom of the sedimentation partition are respectively connected to the first box, and a top partition is provided between the top of the sedimentation partition and the first box; The oil return chamber is connected to the sedimentation chamber through the bottom partition; The sedimentation chamber is communicated with the oil storage chamber through the top partition; An oil return filter is provided between the oil return baffle and the first housing, and edges of the oil return filter are connected to the oil return baffle and the first housing respectively.

2. The hydraulic system oil tank structure according to claim 1, characterized in that: The first box body is provided with an exhaust valve.

3. The hydraulic system oil tank structure according to claim 1, characterized in that: The heat dissipation portion includes a plurality of heat dissipation plates, a plurality of oil through holes are provided, and the plurality of oil through holes are respectively provided on the plurality of heat dissipation plates.

4. The hydraulic system oil tank structure according to claim 3, characterized in that: The plurality of heat dissipation plates are arranged at intervals.

5. The hydraulic system oil tank structure according to claim 3, characterized in that: The heat dissipation plate includes a plurality of groups of heat dissipation strips, and the plurality of groups of heat dissipation strips are arranged at intervals to form the heat dissipation plate.

6. The hydraulic system oil tank structure according to claim 1, characterized in that: One end of the communicating pipe is located near the top of the oil supply chamber, and the other end of the communicating pipe is located near the top of the oil return chamber.

7. The hydraulic system oil tank structure according to claim 1, characterized in that: One end of the oil passage pipe is located near the bottom of the oil storage chamber, and the other end of the oil passage pipe is located near the top of the communication chamber.

8. The hydraulic system oil tank structure according to claim 1, characterized in that: The first box body is located above the second box body, and the first box body and the second box body are an integrated structure.

Citation Information

Patent Citations

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    CN113027830A

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