A hydraulic oil tank with an oil return filter

Abstract

The utility model discloses a hydraulic oil tank with oil return filter, including the oil tank main part, be equipped with the oil return pipe and the oil return filter in the oil tank main part, the oil return pipe is fixed in the oil tank main part one side, and the oil return filter is connected on the oil return pipe, the other side of oil tank main part is equipped with the opening, be equipped with the cover of pressing plate on the opening, the pressing plate is detachably connected with the oil tank main part, the pressing plate is welded with the limit rod, and the end of limit rod passes the opening and extends to the one side of oil return filter, when the oil return filter loosens and has the tendency of the outflow of oil liquid impact, and the end of limit rod props up the oil return filter and restricts the oil return filter to fall, the utility model limit rod can physically block the filter outflow, provides the secondary protection independent of the thread fastening, greatly promotes the operation security of hydraulic system under the strong vibration working condition, thoroughly eliminates the hydraulic oil system pollution risk caused by the filter falling.

Description

Technical Field

[0001] This utility model belongs to the field of oil tank technology, specifically relating to a hydraulic oil tank with a return oil filter. Background Technology

[0002] Return oil filters are widely used in various types of construction machinery, especially in the field of excavator technology. Since most excavators currently convert mechanical energy into hydraulic energy, using hydraulic oil as the working medium to drive the working devices, the installation of a return oil filter is essential. It is also crucial to ensure that the return oil filter is securely installed and free from the risk of dislodgement during normal excavator operation.

[0003] The existing return oil filter has a threaded inlet. The return oil filter and the return oil pipe of the hydraulic oil tank are installed by tightening the torque through a spiral. When the return oil filter is loose, the oil may rush out due to the impact of the return oil, which cannot guarantee the reliability of the return oil filter during installation. Utility Model Content

[0004] This invention provides a hydraulic oil tank with a return oil filter, which prevents the return oil filter from loosening and leaking out without damaging the filter element.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] The first aspect of this utility model provides a hydraulic oil tank with a return oil filter, including an oil tank body; the oil tank body is provided with a return oil pipe and a return oil filter; the return oil pipe is fixed to one side of the oil tank body, and the return oil filter is connected to the return oil pipe;

[0007] An opening is provided on the other side of the main body of the oil tank, and a pressure plate is provided on the opening; the pressure plate is detachably connected to the main body of the oil tank; a limiting rod is provided on the pressure plate, and the end of the limiting rod passes through the opening and extends to one side of the return oil filter;

[0008] When the return oil filter becomes loose and tends to come out due to oil impact, the end of the limit rod presses against the return oil filter to prevent it from falling off.

[0009] Furthermore, the tank body is provided with a flange, which is welded around the opening, and the pressure plate is connected to the flange by bolts.

[0010] Furthermore, the return oil filter includes a filter frame and a filter element; the filter element is disposed on the filter frame, and the filter frame is disposed opposite to the end of the limiting rod.

[0011] Furthermore, an oil inlet is provided on one side of the filter frame, and the oil inlet is threaded and threadedly connected to the return oil pipe; hydraulic oil enters the return oil filter through the oil inlet, and flows into the oil tank body after passing through the filter element.

[0012] Furthermore, the oil return pipe includes an oil return seat, a first oil return branch pipe, and a second oil return branch pipe; one end of the oil return seat is fixed inside the oil tank body, and the other end of the oil return seat is connected to the oil return filter.

[0013] The first return oil branch pipe and the second return oil branch pipe are connected to the middle of the return oil seat; the first return oil branch pipe and the second return oil branch pipe extend to the outside of the oil tank body.

[0014] Furthermore, a gap is provided between the end of the limiting rod and the return oil filter, and the gap is less than the effective thread length of the return oil filter.

[0015] Furthermore, the flange and the pressure plate have the same cutouts.

[0016] Furthermore, the connection between the limiting rod and the pressure plate is a vertical welding method.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] In this invention, the end of the limiting rod extends to the top of the filter to form an axial stop. When the threaded connection loosens due to long-term vibration or oil impact, the limiting rod can physically prevent the filter from escaping, providing secondary protection independent of the threaded fastening. This greatly improves the operational safety of the hydraulic system under strong vibration conditions and completely eliminates the risk of hydraulic oil leakage and system contamination caused by filter detachment.

[0019] This invention simplifies the overall structure of the oil tank and reduces manufacturing costs by adding a limiting rod to the pressure plate. At the same time, the pressure plate adopts a detachable connection method, so the filter element can be replaced simply by removing the pressure plate during maintenance. The limiting rod will not obstruct the axial disassembly and assembly path of the filter element.

[0020] In this utility model, the extension length of the limit rod can be flexibly adjusted according to the actual installation position of the filter. Even if there are manufacturing tolerances or design eccentricities between the oil return pipe and the oil tank opening, the limiting function can still be ensured by adapting the position of the limit rod, thereby enhancing the design's fault tolerance and engineering adaptability. Attached Figure Description

[0021] Figure 1 This is an isometric view of the hydraulic oil tank provided in an embodiment of the present invention;

[0022] Figure 2 A front view of the hydraulic oil tank provided in an embodiment of this utility model;

[0023] Figure 3 This is a structural diagram of the pressure plate and limiting rod provided in the embodiments of this utility model;

[0024] Figure 4 This is a structural diagram of the flange provided in an embodiment of the present invention;

[0025] Figure 5 This is a structural diagram of the oil return filter provided in an embodiment of the present invention.

[0026] In the diagram, 1 is the main body of the oil tank, 11 is the flange, 12 is the opening, 2 is the pressure plate, 21 is the limit rod, 3 is the bolt, 4 is the return oil filter, 41 is the filter frame, 42 is the filter element, 43 is the oil inlet, 5 is the return oil port, 51 is the return oil seat, 52 is the first return oil branch pipe, and 53 is the second return oil branch pipe. Detailed Implementation

[0027] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0028] like Figures 1 to 2 As shown, this embodiment provides a hydraulic oil tank with a return oil filter, including an oil tank body 1; the oil tank body 1 is provided with a return oil pipe 5 and a return oil filter 4; the return oil pipe 5 is fixed to one side of the oil tank body 1, and the return oil filter 4 is connected to the return oil pipe 5;

[0029] The oil return pipe 5 includes an oil return seat 51, a first oil return branch pipe 52, and a second oil return branch pipe 53; one end of the oil return seat 51 is fixed inside the oil tank body 1, and the other end of the oil return seat 51 is connected to the oil return filter 4; the first oil return branch pipe 52 and the second oil return branch pipe 53 are connected to the middle of the oil return seat 51; the first oil return branch pipe 52 and the second oil return branch pipe 53 extend to the outside of the oil tank body 1.

[0030] like Figure 5 As shown, the return oil filter 4 includes a filter frame 41 and a filter element 42; the filter element 42 is disposed on the filter frame 41; the filter frame 41 has an oil inlet 43 on one side, the oil inlet 43 is threaded and threadedly connected to the return oil seat 51 of the return oil pipe 5; hydraulic oil enters the return oil filter 4 through the oil inlet 43, and flows into the oil tank body 1 after passing through the filter element 42.

[0031] An opening 12 is provided on the other side of the oil tank body 1, and a pressure plate 2 is provided on the opening 12; a flange 11 is provided on the oil tank body 1, and the structural diagram of the flange is shown below. Figure 4As shown, the flange 11 is welded around the opening 12, and the pressure plate 2 is connected to the flange 11 by bolts; the flange 11 and the pressure plate 2 have the same cuts, which avoids the risk of incorrect installation due to the even distribution of bolt holes.

[0032] like Figure 3 As shown, the pressure plate 2 is provided with a limiting rod 21. In this embodiment, the limiting rod 21 is set as a hollow tube to reduce the weight of the hydraulic oil tank. The connection between the limiting rod 21 and the pressure plate 2 is vertical welding, so that the two form a rigid whole that cannot be loosened. Under the high-frequency vibration and oil impact conditions of the excavator, the risk of loosening, stripping or fatigue fracture that may occur in the threaded connection is completely eliminated, ensuring that the limiting function is stable and reliable for a long time.

[0033] The addition of a limiting rod to the pressure plate 2 simplifies the overall structure of the oil tank and reduces manufacturing costs. At the same time, the pressure plate 2 adopts a detachable connection method, so the filter element can be replaced simply by removing the pressure plate during maintenance. The limiting rod will not obstruct the axial disassembly and assembly path of the filter element.

[0034] The end of the limiting rod 21 passes through the opening 12 and extends to one side of the return oil filter 4; the extension length of the limiting rod 21 can be flexibly adjusted according to the actual installation position of the filter. Even if there is a manufacturing tolerance or design eccentricity between the return oil pipe 5 and the opening 12 of the oil tank body, the limiting function can still be ensured by adapting the position of the limiting rod 21, which enhances the fault tolerance and engineering adaptability of the design.

[0035] The filter frame 41 is positioned opposite to the end of the limiting rod 21, and there is a gap between the end of the limiting rod 21 and the return oil filter 4, the gap being less than the effective thread length of the return oil filter 4. When the return oil filter 4 becomes loose and tends to detach due to oil impact, the end of the limiting rod 21 presses against the return oil filter 4 to prevent it from falling off.

[0036] In this embodiment, the end of the limiting rod 21 maintains a small gap with the top of the return oil filter 4, which avoids assembly interference and can respond instantly when loosened. Moreover, the limiting force acts directly on the steel frame 41 of the filter rather than the filter element material, which effectively prevents the filter element from being deformed due to compression, thus reducing the filtration accuracy or causing damage, and ensuring the cleanliness of the hydraulic oil and the service life of the system components.

[0037] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A hydraulic oil tank with a return oil filter, characterized in that, It includes a fuel tank body; the fuel tank body is equipped with a return oil pipe and a return oil filter; the return oil pipe is fixed to one side of the fuel tank body, and the return oil filter is connected to the return oil pipe; An opening is provided on the other side of the main body of the oil tank, and a pressure plate is provided on the opening; the pressure plate is detachably connected to the main body of the oil tank; a limiting rod is provided on the pressure plate, and the end of the limiting rod passes through the opening and extends to one side of the return oil filter; When the return oil filter becomes loose and tends to come out due to oil impact, the end of the limit rod presses against the return oil filter to prevent it from falling off.

2. The hydraulic oil tank with a return oil filter according to claim 1, characterized in that, The oil tank body is provided with a flange, which is welded around the opening, and the pressure plate is connected to the flange by bolts.

3. The hydraulic oil tank with a return oil filter according to claim 1, characterized in that, The return oil filter includes a filter frame and a filter element; the filter element is disposed on the filter frame, and the filter frame is opposite to the end of the limiting rod.

4. The hydraulic oil tank with a return oil filter according to claim 3, characterized in that, The filter frame has an oil inlet on one side, and the oil inlet is threaded and connected to the return oil pipe. Hydraulic oil enters the return oil filter through the oil inlet, and flows into the oil tank body after passing through the filter element.

5. The hydraulic oil tank with a return oil filter according to claim 1, characterized in that, The oil return pipe includes an oil return seat, a first oil return branch pipe, and a second oil return branch pipe; one end of the oil return seat is fixed inside the oil tank body, and the other end of the oil return seat is connected to the oil return filter; The first return oil branch pipe and the second return oil branch pipe are connected to the middle of the return oil seat; the first return oil branch pipe and the second return oil branch pipe extend to the outside of the oil tank body.

6. The hydraulic oil tank with a return oil filter according to claim 1, characterized in that, There is a gap between the end of the limiting rod and the return oil filter, and the gap is smaller than the effective thread length of the return oil filter.

7. The hydraulic oil tank with a return oil filter according to claim 2, characterized in that, The flange and the pressure plate have the same cut.

8. The hydraulic oil tank with a return oil filter according to claim 1, characterized in that, The connection between the limiting rod and the pressure plate is a vertical welding method.

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