Hydraulic oil return device and wide-body vehicle

Abstract

The utility model provides a hydraulic oil return device and a wide-body vehicle, and belongs to the technical field of vehicle hydraulic equipment, the hydraulic oil return device comprises a hydraulic oil tank, an oil return assembly and an oil return seat, and a mounting opening is formed in the top of the hydraulic oil tank; the oil return assembly is inserted into the mounting opening and is provided with a limiting part erected at the top of the hydraulic oil tank, and the limiting part is detachably connected with the hydraulic oil tank; the oil return base is arranged at the top of the oil return assembly, a flow guide channel is formed in the oil return base, and the flow guide channel is used for communicating the oil return assembly with a lifting oil way and a steering oil way. The utility model provides a hydraulic oil return device and a wide-body vehicle and aims to solve the problem that in the prior art, after an oil return box and a hydraulic oil tank are welded into an integral structure, maintenance and cleaning difficulty is large.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of vehicle hydraulic equipment, more specifically, relates to a hydraulic oil return device and wide-body vehicle. BACKGROUND

[0002] The engineering machinery such as hydraulic excavator, loader is constituted by lower walking device, upper rotation device and working device connected with rotation device, and each part is driven by oil pressure, so the oil pressure circuit with hydraulic oil tank is configured to provide power for complete machine.

[0003] The hydraulic oil return device generally includes hydraulic oil tank and oil return box arranged in the hydraulic oil tank, and the oil return box is usually welded in the hydraulic oil tank to form an oil return assembly in the prior art. UTILITY MODEL CONTENTS

[0004] The utility model discloses a hydraulic oil return device and wide-body vehicle, and aims at solving the problem that the oil return box and the hydraulic oil tank are welded into an integral structure in the prior art, and the maintenance and cleaning are difficult.

[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of:

[0006] In the first aspect, a hydraulic oil return device is provided, comprising:

[0007] The hydraulic oil tank is provided with a mounting opening at the top;

[0008] The oil return assembly is inserted into the mounting opening and has a limiting portion arranged on the top of the hydraulic oil tank, and the limiting portion is detachably connected with the hydraulic oil tank; and

[0009] The oil return seat is arranged on the top of the oil return assembly, and a flow guide channel is arranged in the oil return seat, and the flow guide channel is used to communicate the oil return assembly with the lifting oil circuit and the steering oil circuit respectively.

[0010] In a possible implementation manner of the first aspect, the hydraulic oil tank comprises:

[0011] The tank body is provided with a clearance hole at the top; and

[0012] The fixing flange comprises a plug-in portion inserted into the clearance hole and a fixing portion arranged on the top of the tank body, and the mounting opening is arranged in the fixing flange and penetrates through the plug-in portion and the fixing portion, and the fixing portion is detachably connected with the limiting portion.

[0013] With reference to the first aspect, in a possible implementation manner, a first sealing groove is formed in a top portion of the hydraulic oil tank, and a first sealing ring is arranged in the first sealing groove and abuts against the limiting portion in an axial direction of the first sealing ring.

[0014] With reference to the first aspect, in a possible implementation manner, the oil return assembly comprises:

[0015] an oil return mechanism inserted into the mounting opening, the oil return mechanism having the limiting portion, and a connecting port being formed in a top portion of the oil return mechanism; and

[0016] an oil return flange arranged on the top portion of the oil return mechanism and covering the connecting port, the oil return flange being detachably connected to the oil return mechanism, and the oil return seat being arranged on a top portion of the oil return flange.

[0017] With reference to the first aspect, in a possible implementation manner, a second sealing groove is formed in the limiting portion, and a second sealing ring is arranged in the second sealing groove and abuts against the oil return flange in an axial direction of the second sealing ring.

[0018] With reference to the first aspect, in a possible implementation manner, the oil return mechanism comprises:

[0019] an oil return box having the connecting port formed in a top portion thereof and a guide port formed in a bottom portion thereof, an installation ring being arranged on an outer circumferential surface of the oil return box, and the installation ring forming the limiting portion; and

[0020] a filter cartridge arranged in the oil return box, the filter cartridge separating the oil return box into an oil inlet cavity and a filter cavity, an inner cavity of the filter cartridge forming the filter cavity, and the oil inlet cavity being in communication with the guide channel.

[0021] With reference to the first aspect, in a possible implementation manner, the filter cartridge comprises:

[0022] a filter body arranged in the oil return box, the filter body having a through filter channel formed in an axial direction of the filter body;

[0023] a filter cover arranged on a top portion of the filter body, the filter cover further having an exhaust hole in communication with the filter channel;

[0024] a guide member arranged on a bottom portion of the filter body and inserted into the filter channel; and

[0025] a blocking piece connected to the filter cover and located directly above the exhaust hole.

[0026] With the first aspect, in a possible implementation manner, the oil return assembly is provided with an oil inlet hole communicated with the flow guide channel, and the hydraulic oil return device further comprises an oil blocking plate connected to the oil return assembly, the oil blocking plate is arranged below the oil inlet hole and is spaced apart from the oil inlet hole in the vertical direction.

[0027] With the first aspect, in a possible implementation manner, the flow guide channel comprises a first oil guide area extending in the vertical direction and a second oil guide area extending in the horizontal direction, the first oil guide area is respectively communicated with the oil return assembly and the lifting oil circuit, and the second oil guide area is respectively communicated with the first oil guide area and the steering oil circuit.

[0028] The hydraulic oil return device has the advantages that, compared with the prior art, the oil return assembly is inserted into the opening of the hydraulic oil tank, the limiting portion of the oil return assembly is in abutment with the hydraulic oil tank, so that the oil return assembly is arranged on the hydraulic oil tank. Since the limiting portion of the oil return assembly is detachably connected to the hydraulic oil tank, the oil return assembly and the hydraulic oil tank can be cleaned by separating the oil return assembly. In addition, when the oil return assembly is damaged, the oil return assembly can be replaced or repaired by separating the oil return assembly. The oil return seat is arranged at the top of the oil return assembly, so that the oil return assembly is communicated with the steering oil circuit and the lifting oil circuit, the straight-line distance of the hydraulic oil from the actuator (the lifting valve) back to the hydraulic oil tank is greatly shortened, the pressure loss caused by the circulation of the hydraulic oil in the pipeline is reduced, and the response speed and the working efficiency of the system can be improved. Compared with the prior art in which the oil return assembly is fixedly connected to the hydraulic oil tank, the cleaning and maintenance costs are simplified, the oil return seat is arranged at the top of the oil return assembly, the oil return seat is directly communicated with the oil return assembly, the pipeline layout is simplified, and the number of pipeline interfaces is reduced.

[0029] In the second aspect, the utility model embodiment further provides a wide-body vehicle comprising the hydraulic oil return device.

[0030] The wide-body vehicle has the advantages that, compared with the prior art, the above-mentioned hydraulic oil return device is adopted, and similar technical effects are achieved, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained by those skilled in the art without creating labor.

[0032] Figure 1The structure schematic view of the hydraulic oil return device provided by the embodiment of the utility model;

[0033] Figure 2 The sectional view of the hydraulic oil return device provided by the embodiment of the utility model;

[0034] Figure 3 The other half sectional view of the hydraulic oil return device provided by the embodiment of the utility model;

[0035] Figure 4 The structure schematic view of the fixed flange and the oil return flange adopted by the embodiment of the utility model;

[0036] Figure 5 The structure schematic view of the filter cartridge adopted by the embodiment of the utility model.

[0037] In the figure: 1, hydraulic oil tank; 101, tank body; 102, fixed flange; 103, first sealing ring; 104, second sealing ring; 2, oil return assembly; 201, oil return box; 202, filter cartridge; 2021, filter main body; 2022, filter cover; 2023, blocking piece; 2024, flow guide piece; 203, oil return flange; 2031, limiting part; 204, exhaust hole; 3, oil return seat; 301, first oil guide area; 302, second oil guide area; 4, oil baffle. DETAILED DESCRIPTION

[0038] In order to make the technical problems, technical schemes and beneficial effects to be solved by the utility model more clear and obvious, the utility model is further described in detail below by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0039] In the claims, the specification, and the drawings of the instant application, terms such as "first", "second", and "third" are used merely to distinguish one element from another, and are not intended to imply a particular order or sequence. Unless otherwise specified, the orientation or position of an element is indicated by the terms "vertical", "horizontal", "clockwise", "counter clockwise", etc. as shown in the drawings, and are used only to facilitate the description of the instant application and to more effectively illustrate and describe the present application, and are not intended to limit the specific scope of the application. In the claims, the specification, and the drawings of the instant application, unless otherwise specified, the terms "fixedly connected" or "fixedly connected" are to be construed broadly to include any connection that does not allow relative movement between the two elements connected, and that does not allow relative rotation between the two elements connected. That is, it includes non-detachable fixed connection, detachable fixed connection, integral connection, and fixed connection through other devices or elements. In the claims, the specification, and the drawings of the instant application, the terms "include", "have", and their variants are intended to mean "include but not limited to".

[0040] Please see Figures 1 to 5 , the hydraulic oil return device and wide body vehicle provided by the utility model will be described. The hydraulic oil return device comprises a hydraulic oil tank 1, an oil return assembly 2, and an oil return seat 3. The hydraulic oil tank 1 is provided with a mounting opening at the top. The oil return assembly 2 is inserted into the mounting opening and has a limiting portion 2031 arranged on the top of the hydraulic oil tank 1. The limiting portion 2031 is detachably connected with the hydraulic oil tank 1. The oil return seat 3 is arranged on the top of the oil return assembly 2. The oil return seat 3 is provided with a flow guide channel. The flow guide channel is used to communicate the oil return assembly 2 with the lifting oil circuit and the steering oil circuit respectively.

[0041] Compared with the prior art, the hydraulic oil return device inserts the oil return assembly 2 into the opening of the hydraulic oil tank 1, the limiting portion 2031 of the oil return assembly 2 abuts against the hydraulic oil tank 1, so that the oil return assembly 2 is arranged on the hydraulic oil tank 1. Since the limiting portion 2031 of the oil return assembly 2 is detachably connected with the hydraulic oil tank 1, the oil return assembly 2 and the hydraulic oil tank 1 can be cleaned by separating the oil return assembly 2. In addition, when the oil return assembly 2 is damaged, the oil return assembly 2 can be replaced or repaired by separating the oil return assembly 2. The oil return seat 3 is arranged at the top of the oil return assembly 2, so that the oil return assembly 2 is communicated with the steering oil circuit and the lifting oil circuit, respectively, the straight-line distance of the hydraulic oil from the executing element (the lifting valve) back to the hydraulic oil tank 1 is greatly shortened, the pressure loss caused by the circulation of the hydraulic oil in the pipeline is reduced, and the response speed and the working efficiency of the system can be improved. Compared with the prior art that the oil return assembly 2 is fixedly connected with the hydraulic oil tank 1, not only the cleaning and maintenance costs are simplified, but also the oil return seat 3 is arranged at the top of the oil return assembly 2, the oil return seat 3 is directly communicated with the oil return assembly 2, the pipeline layout is simplified, and the number of pipeline interfaces is reduced.

[0042] Optionally, the oil return assembly is screwed or clamped with the hydraulic oil tank 1, for example, the oil return assembly has external threads, the mounting opening has matching internal threads, and the oil return assembly is directly screwed to the hydraulic oil tank 1. The oil return assembly can be provided with a clamping piece, and the hydraulic oil tank 1 is provided with a matching clamping hole, and the clamping piece is inserted into the clamping hole.

[0043] It should be noted that the oil return seat 3 is provided with a lifting valve, the lifting valve is part of the lifting system and is communicated with the lifting oil circuit, and the lifting valve communicates the lifting oil circuit with the flow guide channel, so as to control the conduction or blockage of the flow guide channel and the lifting oil circuit.

[0044] It should be noted that the "top" and "bottom" referred to in this paper are based on the orientation in the drawings.

[0045] In some embodiments, referring to Figures 1 to 3 , the hydraulic oil tank 1 comprises a tank body 101 and a fixed flange 102, the tank body 101 is provided with a clearance hole at the top, the fixed flange 102 comprises a plug-in portion inserted into the clearance hole and a fixed portion arranged on the top of the tank body 101, the mounting opening is arranged on the fixed flange 102 and penetrates through the plug-in portion and the fixed portion, and the fixed portion is detachably connected with the limiting portion 2031.

[0046] The fixing flange 102 is arranged on the box body 101, which can increase the strength of the box body 101 in the area around the accommodation hole, and improve the anti-deformation ability of the connection between the hydraulic oil tank 1 and the return assembly. Since the insertion part of the fixing flange 102 is inserted into the accommodation hole, the connection stability and sealing effect between the fixing flange 102 and the box body 101 are increased. The fixing part is arranged on the top of the box body 101 and detachably connected with the limiting part 2031 of the return assembly, which increases the reliability of the connection.

[0047] In some embodiments, referring to Figures 2 to 3 , the top of the hydraulic oil tank 1 is provided with a first sealing groove, and the first sealing groove is provided with a first sealing ring 103, which abuts against the limiting part 2031 in the axial direction of the first sealing ring 103.

[0048] The first sealing ring 103 is arranged in the first sealing groove, so as to limit the position of the first sealing ring 103 and avoid displacement of the first sealing ring 103 under stress. The scheme in this embodiment improves the sealing performance between the hydraulic oil tank 1 and the return assembly 2, and avoids leakage of hydraulic oil.

[0049] Optionally, the first sealing ring 103 is an elastic member, such as a rubber ring.

[0050] In some embodiments, referring to Figures 2 to 3 , the return assembly 2 comprises a return mechanism and a return flange 203. The return mechanism is inserted into the mounting opening, the return mechanism has a limiting part 2031, and the top of the return mechanism is provided with a connecting port. The return flange 203 is arranged on the top of the return mechanism and covers the connecting port. The return flange 203 is detachably connected with the return mechanism, and the return seat 3 is arranged on the top of the return flange 203.

[0051] The return flange 203 is arranged on the top of the return mechanism to achieve detachable connection with the return mechanism. Compared with the scheme of arranging the return assembly 2 as an integral structure, the scheme in this embodiment is more convenient for cleaning and maintenance of the return assembly 2 and has higher operability.

[0052] Optionally, the return flange 203 is clamped or screwed with the limiting part 2031 of the return mechanism.

[0053] In some embodiments, referring to Figures 2 to 3 , the limiting part 2031 is provided with a second sealing groove, and the second sealing groove is provided with a second sealing ring 104, which abuts against the return flange 203 in the axial direction of the second sealing ring 104.

[0054] The second sealing ring 104 is arranged in the second sealing groove of the limiting part 2031, so as to limit the position of the second sealing ring 104 and avoid displacement of the second sealing ring 104 under stress. The scheme in this embodiment improves the sealing performance between the limiting part 2031 and the return flange 203, and reduces the risk of leakage of hydraulic oil.

[0055] Optionally, the oil return flange 203, the limiting portion 2031 and the hydraulic oil tank 1 are provided with corresponding connecting holes, and locking bolts are inserted in the connecting holes. The locking bolts are radially offset from the first sealing ring 103 and the second sealing ring 104, respectively.

[0056] In some embodiments, referring to Figures 2 to 3 , the oil return mechanism includes an oil return box 201 and a filter cartridge 202. The top of the oil return box 201 is provided with a connecting port, and the bottom is provided with an oil guiding port. The outer circumferential surface of the oil return box 201 has a mounting ring, which forms a limiting portion 2031. The filter cartridge 202 is arranged in the oil return box 201, and the filter cartridge 202 divides the oil return box 201 into an oil inlet cavity and a filter cavity. The inner cavity of the filter cartridge 202 forms the filter cavity, and the oil inlet cavity is communicated with the flow guiding channel.

[0057] The hydraulic oil enters the oil inlet cavity through the flow guiding channel first, then enters the filter cavity after being filtered by the filter cartridge 202, and finally is discharged into the hydraulic oil tank 1 from the bottom of the filter cartridge 202. The scheme in this embodiment shortens the distance between the flow guiding channel and the oil inlet cavity, reduces the flow path of the hydraulic oil, and thus can reduce the damage of the hydraulic oil.

[0058] Optionally, the mounting ring is integrally formed with the oil return box 201 or is welded.

[0059] Specifically, the oil return mechanism further includes a spring and the like, which is a conventional arrangement in the art and is not the point of the present application, and will not be described here.

[0060] In some embodiments, referring to Figure 2 and 5 , the filter cartridge 202 includes a filter body 2021, a filter cover 2022, a flow guiding piece 2024 and a blocking piece 2023. The filter body 2021 is arranged in the oil return box 201, and the filter body 2021 is provided with a through filter channel in the axial direction. The filter cover 2022 is arranged on the top of the filter body 2021, and the filter cover 2022 is further provided with an exhaust hole 204 communicated with the filter channel. The flow guiding piece 2024 is arranged at the bottom of the filter body 2021 and is inserted in the filter channel. The blocking piece 2023 is connected to the filter cover 2022 and is located directly above the exhaust hole 204.

[0061] In this embodiment, the filter cartridge 202 is divided into multiple components, which facilitates subsequent cleaning and maintenance of the filter cartridge 202. When one or more components are damaged, they can be replaced or repaired individually, reducing maintenance costs. The blocking piece 2023 is located directly above the exhaust hole 204, which avoids the impact of gas on the hydraulic oil tank 1, thereby prolonging the service life of the hydraulic oil tank 1.

[0062] Optionally, the bottom of the filter cover 2022 is further provided with a flow guide pipe which is connected to the bottom of the exhaust hole 204.

[0063] In some embodiments, referring to Figures 2 to 4 The oil return assembly 2 is provided with an oil inlet hole which is connected to the flow guide channel, and the hydraulic oil return device further comprises an oil baffle 4 which is connected to the oil return assembly 2, and the oil baffle 4 is arranged below the oil inlet hole and is spaced apart from the oil inlet hole in the vertical direction.

[0064] The oil return returned to the oil return assembly 2 impacts on the oil baffle 4, the oil baffle 4 blocks and divides the hydraulic oil returned to the hydraulic oil tank 1, avoids the direct impact of the oil return on an area of the oil return assembly 2, and further avoids the problems of large hydraulic oil fluctuation and high local temperature in the oil return assembly 2.

[0065] Optionally, the oil baffle 4 is a U-shaped member, and two legs are connected to the oil return assembly 2.

[0066] In some embodiments, referring to Figure 3 The flow guide channel comprises a first oil guide area 301 which extends in the vertical direction and a second oil guide area 302 which extends in the horizontal direction, the first oil guide area 301 is connected to the oil return assembly 2 and the lifting oil way respectively, and the second oil guide area 302 is connected to the first oil guide area 301 and the steering oil way respectively.

[0067] The second oil guide area 302 is connected to the first oil guide area 301, so that the hydraulic oil in the steering oil way and the lifting oil way can enter the oil return assembly 2 in the vertical direction. Since the hydraulic oil has a certain viscosity, the connection of the first oil guide area 301 and the oil return assembly 2 can reduce the resistance of the hydraulic oil.

[0068] Based on the same inventive concept, the utility model further provides a wide-body vehicle. The wide-body vehicle comprises the above-mentioned hydraulic oil return device.

[0069] The wide-body vehicle provided by the utility model adopts the hydraulic oil return device, the utility model hydraulic oil return device inserts the oil return assembly 2 in the opening of the hydraulic oil tank 1, the limiting portion 2031 of the oil return assembly 2 abuts against the hydraulic oil tank 1, so that the oil return assembly 2 is arranged on the hydraulic oil tank 1. Since the limiting portion 2031 of the oil return assembly 2 is detachably connected with the hydraulic oil tank 1, the oil return assembly 2 and the hydraulic oil tank 1 can be cleaned by separating the oil return assembly 2. In addition, when the oil return assembly 2 is damaged, it can also be replaced or repaired by separating the oil return assembly 2. The oil return seat 3 is arranged on the top of the oil return assembly 2, so that the oil return assembly 2 is communicated with the steering oil circuit and the lifting oil circuit respectively, the straight-line distance of the hydraulic oil from the executing element (the lifting valve) back to the hydraulic oil tank 1 is greatly shortened, the pressure loss caused by the circulation of the hydraulic oil in the pipeline is reduced, and the response speed and the working efficiency of the system can be improved. Compared with the mode that the oil return assembly 2 is fixedly connected with the hydraulic oil tank 1 in the prior art, not only the cleaning and the maintenance cost are simplified, but also the oil return seat 3 is arranged on the top of the oil return assembly 2, the oil return seat 3 is directly communicated with the oil return assembly 2, the pipeline layout is simplified, and the number of pipeline interfaces is reduced.

[0070] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. Hydraulic oil return device, characterized in that The hydraulic oil tank comprises: a hydraulic oil tank having an installation opening formed at the top thereof; a return oil assembly inserted into the installation opening and having a limiting portion arranged on the top of the hydraulic oil tank, the limiting portion being detachably connected with the hydraulic oil tank; and a return oil seat arranged on the top of the return oil assembly, the return oil seat having a flow guide channel formed therein, the flow guide channel being used for connecting the return oil assembly with a lifting oil circuit and a steering oil circuit respectively.

2. The hydraulic oil return device according to claim 1, wherein The hydraulic oil tank comprises: a tank body having a clearance hole formed at the top thereof; and a fixing flange comprising an insertion portion inserted into the clearance hole and a fixing portion arranged on the top of the tank body, the installation opening being formed in the fixing flange and penetrating through the insertion portion and the fixing portion, the fixing portion being detachably connected with the limiting portion.

3. The hydraulic oil return device of claim 1, wherein The top of the hydraulic oil tank is provided with a first sealing groove, and a first sealing ring is arranged in the first sealing groove and abuts against the limiting portion in the axial direction of the first sealing ring.

4. The hydraulic oil return device of claim 1, wherein The return oil assembly comprises: a return oil mechanism inserted into the installation opening, the return oil mechanism having the limiting portion, and the top of the return oil mechanism being provided with a connecting opening; and a return oil flange arranged on the top of the return oil mechanism and covering the connecting opening, the return oil flange being detachably connected with the return oil mechanism, and the return oil seat being arranged on the top of the return oil flange.

5. The hydraulic oil return device of claim 4, wherein The limiting portion is provided with a second sealing groove, and a second sealing ring is arranged in the second sealing groove and abuts against the return oil flange in the axial direction of the second sealing ring.

6. The hydraulic oil return device of claim 4, wherein The return oil mechanism comprises: a return oil box having the connecting opening formed at the top thereof and an oil guide opening formed at the bottom thereof, the outer circumferential surface of the return oil box having a mounting ring, and the mounting ring forming the limiting portion; and a filter cartridge arranged in the return oil box, the filter cartridge separating the return oil box into an oil inlet cavity and a filter cavity, the inner cavity of the filter cartridge forming the filter cavity, and the oil inlet cavity being connected with the flow guide channel.

7. The hydraulic oil return device of claim 6, wherein The filter cartridge comprises: a filter main body arranged in the return oil box, the filter main body being provided with a through filter channel in the axial direction; a filter cover arranged on the top of the filter main body, the filter cover being further provided with an exhaust hole connected with the filter channel; a flow guide member arranged at the bottom of the filter main body and inserted into the filter channel; and a blocking piece connected with the filter cover and located directly above the exhaust hole.

8. The hydraulic oil return device of claim 1, wherein The return oil assembly is provided with an oil inlet hole connected with the flow guide channel, and the hydraulic return oil device further comprises an oil blocking plate connected with the return oil assembly, the oil blocking plate being arranged below the oil inlet hole and being spaced apart from the oil inlet hole in the vertical direction.

9. The hydraulic oil return device of claim 1, wherein The flow guide channel comprises a first oil guide area extending in the vertical direction and a second oil guide area extending in the horizontal direction, the first oil guide area being connected with the return oil assembly and the lifting oil circuit respectively, and the second oil guide area being connected with the first oil guide area and the steering oil circuit respectively.

10. Wide-body vehicle, characterized in that The hydraulic return oil device has any one of claims 1-9.

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