Filter screen assembly for hydraulic oil tank

Abstract

The utility model relates to a filter screen subassembly for hydraulic oil tank, including outer frame (1) and filter screen body (2), the outer frame (1) includes frame body (11) and bending part (12), the frame body (11) and the bending part (12) integral bending forming, the bending part (12) is trapezoidal, the length of the side of trapezoidal near the frame body (11) is same with the length of the side length of frame body (11), the frame body (11) is equipped with preset round hole (111), the bending part (12) corresponding position is equipped with preset semicircular hole (121) and preset round hole (111), the filter screen body (2) is clamped between the frame body (11) and the bending part (12), and is located in the inside of multiple preset round hole (111), the bending part (12) and the frame body (11) are connected in resistance welding at the filter screen body (2). The four outer edges of the outer frame of the application are completely closed, the strength is high, and the installation hole does not need to be processed any more, which avoids that filter screen metal wire is free to fall off to the inside of the oil tank.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and more specifically, to a filter assembly for a hydraulic oil tank. Background Technology

[0002] Hydraulic oil tanks used in construction machinery, especially large construction machinery, typically require one or more flat filter screens to filter impurities and foreign objects. These filters consist of an outer frame and the filter body. Specifically, a rectangular filter screen is first cut out, then frame-shaped rubber pads are glued to both sides to form the outer frame. Finally, mounting holes are punched or drilled to install it inside the hydraulic oil tank. The disadvantages of this manufacturing process are: 1) The adhesion between the two outer frames is poor. 2) When drilling or punching mounting holes, loose filter mesh fibers are generated around the holes. These loose fibers may detach in the future, causing secondary pollution. Summary of the Invention

[0003] The purpose of this invention is to provide a filter assembly for hydraulic oil tanks, so as to at least partially solve the problems existing in the related art.

[0004] To achieve the above objectives, this disclosure provides a filter assembly for a hydraulic oil tank, comprising: an outer frame and a filter body; the outer frame includes a frame body and a bent portion; the frame body and the bent portion are integrally bent; the bent portion is trapezoidal; the length of the side of the trapezoid closest to the frame body is the same as the side length of the frame body; the frame body has a preset circular hole; the bent portion has a preset semi-circular hole and a preset circular hole at a corresponding position; the filter body is sandwiched between the frame body and the bent portion and is disposed inside the plurality of preset circular holes; the bent portion and the frame body are resistance welded together at the filter body.

[0005] Optionally, both the outer frame and the filter body are made of stainless steel.

[0006] Optionally, the frame body is a rectangular outer frame, and the filter body is rectangular.

[0007] Optionally, the bending portion includes two first bending segments and two second bending segments, the two first bending segments are arranged opposite to each other, the length of the side of the first bending segment closest to the frame body is the same as the length of the frame body, and the first bending segment is provided with the preset semi-circular hole and the preset circular hole; Two second bending segments are arranged opposite each other, and the length of the side of the second bending segment closest to the frame body is the same as the width of the frame body. The second bending segment is provided with the preset semi-circular hole.

[0008] Optionally, the frame body is provided with eight preset circular holes, the first bending section is provided with two preset semi-circular holes and two preset circular holes, and the second bending section is provided with two preset semi-circular holes.

[0009] Optionally, resistance welding points are provided within the area where the outer frame overlaps with the filter body.

[0010] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects: Pre-drilled circular holes are made on the frame body, and pre-drilled semi-circular holes and circular holes are made at corresponding positions on the pre-bent section. First, unfold the bent section away from the frame body, at which point the bent section and the frame body form an acute angle. Next, place the filter body inside the pre-drilled circular holes. Then, bend the bent section towards the frame body, at which point the bent section and the frame body are approximately parallel. Finally, the bent section and the frame body are connected by resistance welding at the filter body. The outer frame wraps the filter inside and is then shaped by resistance welding, ensuring that the outer edge of the frame is completely sealed. Resistance welding provides better strength than bonding. The pre-drilled circular holes and semi-circular holes on the outer frame are pre-drilled, and after bending, the holes on the front and back automatically align and overlap. The outer edge of the filter is placed inside the mounting holes, so the filter will not be exposed after the outer frame is bent, eliminating the need for punching or drilling, and thus preventing loose filter wires from falling off. Attached Figure Description

[0011] Figure 1 This is a schematic diagram illustrating the unfolded state of a filter assembly for a hydraulic oil tank according to an exemplary embodiment of the present disclosure.

[0012] Figure 2 This is a schematic diagram illustrating the bent state of a filter assembly for a hydraulic oil tank according to an exemplary embodiment of the present disclosure.

[0013] Figure 3 This is a manufacturing process for a filter assembly for a hydraulic oil tank, as shown in an exemplary embodiment of the present disclosure. Figure 1 .

[0014] Figure 4 This is a manufacturing process for a filter assembly for a hydraulic oil tank, as shown in an exemplary embodiment of the present disclosure. Figure 2 .

[0015] Figure 5 This is a manufacturing process for a filter assembly for a hydraulic oil tank, as shown in an exemplary embodiment of the present disclosure. Figure 3 .

[0016] The following are the reference numerals: 1. Outer frame; 11. Frame body; 111. Preset round hole; 12. Bending section; 121. Preset semi-circular hole; 122. First bending section; 123. Second bending section; 2. Filter screen body; 3. Resistance welding joint. Detailed Implementation

[0017] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0018] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "front," "rear," "left," and "right" are used for ease of description based on the drawing orientations of the corresponding figures, while "inner" and "outer" are defined based on the contours of the corresponding components themselves. Terms such as "first" and "second" used in this disclosure are used to distinguish one element from another and do not have sequential or importance implications. Furthermore, when the following description refers to the figures, unless otherwise indicated, the same numbers in different figures represent the same or similar elements.

[0019] Please see Figures 1 to 5 This disclosure provides a filter assembly for a hydraulic oil tank, including an outer frame 1 and a filter body 2. The outer frame 1 includes a frame body 11 and a bending portion 12, which are integrally bent. The length of the trapezoidal side closest to the frame body 11 is the same as the side length of the frame body 11. The frame body 11 is provided with a preset circular hole 111, and the bending portion 12 is provided with a preset semi-circular hole 121 and a preset circular hole 111 at the corresponding position. The filter body 2 is sandwiched between the frame body 11 and the bending portion 12 and is located inside the plurality of preset circular holes 111. The bending portion 12 and the frame body 11 are resistance welded together at the filter body 2.

[0020] Understandably, a pre-drilled circular hole 111 is made on the frame body 11, and a pre-drilled semi-circular hole 121 and a pre-drilled circular hole 111 are made at the corresponding positions on the pre-bent portion 12. First, the bent portion 12 is unfolded away from the frame body 11, at which point the bent portion 12 and the frame body 11 form an acute angle. Next, the filter body 2 is placed inside the pre-drilled circular hole 111. After the outer frame 1 is flattened, the filter body 2 will not obstruct the mounting hole, avoiding secondary pollution caused by mesh detachment due to drilling or punching. Then, the bent portion 12 is bent towards the side closer to the frame body 11, at which point the bent portion 12 and the frame body 11 are approximately parallel. Finally, the bent portion 12 and the frame body 11 are connected by resistance welding at the filter body 2. The outer frame 1 wraps the filter inside and is then shaped by resistance welding, allowing the outer edge of the frame to be fully enclosed. Resistance welding provides better strength than bonding. The pre-drilled round holes 111 and pre-drilled semi-circular holes 121 on the outer frame 1 are pre-drilled. After bending, the holes on the front and back sides are automatically aligned and overlapped. The outer edge of the filter screen is placed inside the mounting hole. After the outer frame 1 is bent, the filter screen will not be exposed, eliminating the need for punching or drilling. This avoids the loose filter screen fibers from falling off, prevents secondary pollution of the oil tank, and extends the service life.

[0021] In one embodiment, both the outer frame 1 and the filter body 2 are made of stainless steel. The outer frame 1, made of stainless steel sheet, has superior strength and service life compared to rubber or resin sheet outer frames 1.

[0022] In one embodiment, the frame body 11 is a rectangular outer frame 1, and the filter body 2 is rectangular.

[0023] In one embodiment, the bending portion 12 includes two first bending segments 122 and two second bending segments 123. The two first bending segments 122 are arranged opposite to each other. The length of the side of the first bending segment 122 closest to the frame body 11 is the same as the length of the frame body 11. The first bending segment 122 is provided with a preset semi-circular hole 121 and a preset circular hole 111. The two second bending segments 123 are arranged opposite to each other. The length of the side of the second bending segment 123 closest to the frame body 11 is the same as the width of the frame body 11. The second bending segment 123 is provided with a preset semi-circular hole 121.

[0024] In one embodiment, the frame body 11 is provided with eight preset circular holes 111, the first bending section 122 is provided with two preset semi-circular holes 121 and two preset circular holes 111, and the second bending section 123 is provided with two preset semi-circular holes 121.

[0025] In one embodiment, resistance welding points 3 are provided within the area where the outer frame 1 overlaps with the filter body 2.

[0026] This invention has been described through embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of this invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, this invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this invention.

Claims

1. A filter assembly for a hydraulic oil tank, characterized in that, The filter includes an outer frame (1) and a filter body (2). The outer frame (1) includes a frame body (11) and a bending part (12). The frame body (11) and the bending part (12) are integrally bent. The bending part (12) is trapezoidal. The length of the side of the trapezoid closest to the frame body (11) is the same as the length of the side of the frame body (11). The frame body (11) is provided with a preset circular hole (111). The bending part (12) is provided with a preset semi-circular hole (121) and a preset circular hole (111) at the corresponding position. The filter body (2) is sandwiched between the frame body (11) and the bending part (12) and is located inside the multiple preset circular holes (111). The bending part (12) and the frame body (11) are connected by resistance welding at the filter body (2).

2. The filter assembly for a hydraulic oil tank according to claim 1, characterized in that, Both the outer frame (1) and the filter body (2) are made of stainless steel.

3. The filter assembly for a hydraulic oil tank according to claim 2, characterized in that, The frame body (11) is a rectangular outer frame (1), and the filter body (2) is rectangular.

4. The filter assembly for a hydraulic oil tank according to claim 3, characterized in that, The bending portion (12) includes two first bending segments (122) and two second bending segments (123). The two first bending segments (122) are arranged opposite to each other. The length of the side of the first bending segment (122) closest to the frame body (11) is the same as the length of the frame body (11). The first bending segment (122) is provided with the preset semi-circular hole (121) and the preset circular hole (111). Two second bending segments (123) are arranged opposite to each other. The length of the side of the second bending segment (123) closest to the frame body (11) is the same as the width of the frame body (11). The second bending segment (123) is provided with the preset semi-circular hole (121).

5. The filter assembly for a hydraulic oil tank according to claim 4, characterized in that, The frame body (11) is provided with eight preset circular holes (111), the first bending section (122) is provided with two preset semi-circular holes (121) and two preset circular holes (111), and the second bending section (123) is provided with two preset semi-circular holes (121).

6. The filter assembly for a hydraulic oil tank according to claim 4, characterized in that, Resistance welding points (3) are provided within the area where the outer frame (1) overlaps with the filter body (2).

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