Overflow type hydraulic filter

Abstract

The utility model relates to the field of filters, and discloses an overflow type hydraulic filter which comprises a filtering mechanism, the filtering mechanism comprises a filter body, the outer wall of the upper portion of the filter body is sleeved with an upper shell, the inner wall of the upper shell is connected with the outer wall of the filter body in a penetrating mode, and a liquid outlet is formed in the outer wall of one side of the upper shell. A liquid inlet is formed in the outer wall of the other side of the upper shell, a first cavity is formed in the lower portion of the inner wall of the filter body, an elastic sealing gasket is fixedly connected to the upper end of the first cavity, and a supporting disc is fixedly connected to the upper end of the elastic sealing gasket. According to the utility model, the problems of hydraulic clamping and mechanical matching clamping faults caused by small matching clearance are solved through the sleeving matching between the upper shell and the filter body, and meanwhile, the friction resistance between the upper shell and the filter body is reduced by utilizing the matching precision between the upper shell and the filter body, so that the product performance is improved; and the service life of the filter body is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of filters, in particular to an overflow type hydraulic filter. Background Art

[0002] An overflow type hydraulic filter is a device used to filter impurities and particles in the oil in a hydraulic system. Its main function is to keep the hydraulic system clean, prevent the impurities in the oil from causing wear to the hydraulic components, extend the service life of the hydraulic components, and ensure the normal working performance of the hydraulic system.

[0003] When the oil pressure entering the hydraulic filter is too high in the traditional overflow type hydraulic filter, it may cause damage to the filter body, thus affecting the service life of the product. This is because the design and materials of the traditional filter may not be convenient to withstand the excessive pressure beyond its designed pressure range, resulting in deformation, rupture or damage to the internal structure of the filter body.

[0004] Therefore, the technicians in this field provide an overflow type hydraulic filter to solve the problems raised in the above background art. Content of the Utility Model

[0005] The purpose of the content of the utility model is to solve the disadvantages existing in the prior art, and propose an overflow type hydraulic filter. Through the socket joint cooperation between the upper shell and the filter body, the problems of hydraulic clamping and mechanical cooperation clamping failure caused by a small clearance are solved. At the same time, by using the fitting accuracy between the upper shell and the filter body, the frictional resistance between the two is reduced, the performance of the product is improved, and the service life of the filter body is extended.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] An overflow type hydraulic filter includes a filtering mechanism. The filtering mechanism includes a filter body. An outer wall of the upper part of the filter body is sleeved with an upper shell. An inner wall of the upper shell is connected to an outer wall of the filter body in a penetrating manner. An outlet is arranged on an outer wall of one side of the upper shell, and an inlet is arranged on an outer wall of the other side of the upper shell. A first cavity is arranged at a lower part of an inner wall of the filter body. An elastic gasket is fixedly connected to an upper end of the first cavity. A support plate is fixedly connected to an upper end of the elastic gasket. A guide rod is fixedly connected to a middle part of an upper end of the support plate. A spring is sleeved on a rod body of the guide rod. A limiting block is fixedly connected to an upper end of the spring. Sliders are fixedly connected to both sides of an outer wall of the limiting block. A second cavity is arranged at an upper part of an inner wall of the filter body. Through grooves are arranged on both sides of an inner wall of the second cavity;

[0008] Through the above technical solution, by means of the socket connection between the upper housing and the filter body, the hydraulic clamping problem and the mechanical clamping failure caused by the small mating clearance are solved. At the same time, the mating precision between the upper housing and the filter body is improved, thereby reducing the frictional resistance between the two, enhancing the performance of the product, and extending the service life of the filter body.

[0009] Further, one side of the upper end of the limiting block is connected through a first liquid outlet valve and penetrates through the limiting block to the inside of the second cavity, and the other side of the upper end of the limiting block is connected through a first liquid inlet valve and penetrates through the limiting block to the inside of the second cavity;

[0010] Through the above technical solution, the setting of the first liquid outlet valve and the first liquid inlet valve enables precise control of the liquid inlet and outlet, thereby achieving precise control of the hydraulic system.

[0011] Further, one side of the upper end of the elastic sealing gasket and the support plate is connected through a second liquid outlet valve and penetrates through the elastic sealing gasket to the inside of the first cavity, and the other side of the upper end of the elastic sealing gasket and the support plate is connected through a second liquid inlet valve and penetrates through the elastic sealing gasket to the inside of the first cavity;

[0012] Through the above technical solution, when the pressure in the hydraulic system exceeds the set value, the second liquid outlet valve can automatically open to overflow the excess hydraulic oil to prevent the system from overloading.

[0013] Further, the lower end of the spring is fixedly connected to the upper end of the support plate;

[0014] Through the above technical solution, the stability of the support plate can be increased, making it not easily deformed or displaced when subjected to external forces.

[0015] Further, the inner wall of the limiting block is slidably connected to the rod body of the guide rod;

[0016] Through the above technical solution, the positioning and guiding of the guide rod on the inner wall of the limiting block can be ensured, preventing the guide rod from deviating or being misaligned during operation.

[0017] Further, chutes are provided at both the front end and the rear end of the through groove, and the outer walls of the sliders are slidably connected to the inner walls of the chutes;

[0018] Through the above technical solution, through the sliding connection of the sliders, different working conditions and requirements can be adapted, and the friction during movement can also be reduced, improving the operating efficiency of the system.

[0019] Further, the outer walls of the elastic sealing gasket and the support plate are fixedly connected to the middle part of the inner wall of the filter body;

[0020] Through the above technical solution, it is possible to ensure that these components remain stable during operation, reduce displacement or damage caused by vibration or impact, and also provide good sealing performance to prevent oil leakage and ensure the integrity of the system.

[0021] Furthermore, a filter screen is fixedly connected to the middle of the inner wall of the upper housing;

[0022] Through the above technical solution, impurities and particles in the oil can be effectively intercepted, the cleanliness of the oil can be guaranteed, and the wear of hydraulic system components can be reduced.

[0023] The utility model has the following beneficial effects:

[0024] 1. An overflow hydraulic filter proposed by the utility model solves the problems of hydraulic clamping and mechanical clamping failure due to small clearance by the socket fit between the upper housing and the filter body. At the same time, the fitting accuracy between the upper housing and the filter body reduces the frictional resistance between the two, improves the performance of the product, and extends the service life of the filter body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is an axonometric view of an overflow hydraulic filter proposed by the utility model;

[0026] Figure 2 is a front view of an overflow hydraulic filter proposed by the utility model;

[0027] Figure 3 is a sectional view of an overflow hydraulic filter proposed by the utility model;

[0028] Figure 4 is a schematic diagram of the internal structure of an overflow hydraulic filter proposed by the utility model;

[0029] Figure 5 is a schematic diagram of the partial structure of an overflow hydraulic filter proposed by the utility model;

[0030] Figure 6 is Figure 3 the enlarged view of part A in

[0031] Legend:

[0032] 1. Filter mechanism; 101. Upper housing; 102. Filter body; 103. Filter net; 104. Limiting block; 105. Spring; 106. Guide rod; 107. First cavity; 108. Second liquid inlet valve; 109. Second cavity; 110. Liquid outlet; 111. Liquid inlet; 112. First liquid outlet valve; 113. Second liquid outlet valve; 114. Through groove; 115. Slide block; 116. Slide groove; 117. Elastic sealing pad; 118. Support plate; 119. First liquid inlet valve. Detailed implementation manner

[0033] Next, the technical solutions in the specific implementation manners of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the specific implementation manners of the present utility model. Obviously, the described specific implementation manners are only a part of the specific implementation manners of the present utility model, rather than all of the specific implementation manners. Based on the specific implementation manners in the present utility model, all other specific implementation manners obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0034] Refer to Figure 1 、 Figure 3 、 Figure 4 and Figure 5 , a specific implementation manner provided by the present utility model:

[0035] An overflow type hydraulic filter includes a filter mechanism 1. The filter mechanism 1 includes a filter body 102. The outer wall of the upper part of the filter body 102 is sleeved with an upper housing 101. The inner wall of the upper housing 101 is connected to the outer wall of the filter body 102 in a through manner. A liquid outlet 110 is opened on one outer wall of the upper housing 101, and a liquid inlet 111 is opened on the other outer wall of the upper housing 101. A first cavity 107 is opened in the lower part of the inner wall of the filter body 102. An elastic sealing pad 117 is fixedly connected to the upper end of the first cavity 107. A support plate 118 is fixedly connected to the upper end of the elastic sealing pad 117. A guide rod 106 is fixedly connected to the middle of the upper end of the support plate 118. A spring 105 is sleeved on the rod body of the guide rod 106. A limiting block 104 is fixedly connected to the upper end of the spring 105. Slide blocks 115 are fixedly connected to both sides of the outer wall of the limiting block 104. Through grooves 114 are opened on both sides of the inner wall of the second cavity 109 in the upper part of the inner wall of the filter body 102;

[0036] Through the socket cooperation between the upper housing 101 and the filter body 102, the problems of hydraulic clamping and mechanical clamping failures caused by small fitting clearances are solved. At the same time, the fitting accuracy between the upper housing 101 and the filter body 102 is improved, thereby reducing the frictional resistance between the two, improving the performance of the product, and increasing the service life of the filter body 102.

[0037] Reference Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , one side of the upper end of the limit block 104 is connected through a first liquid outlet valve 112 and penetrates through the limit block 104 to the inside of the second cavity 109, and the other side of the upper end of the limit block 104 is connected through a first liquid inlet valve 119 and penetrates through the limit block 104 to the inside of the second cavity 109. The settings of the first liquid outlet valve 112 and the first liquid inlet valve 119 enable precise control of the liquid inflow and outflow, thereby achieving precise control of the hydraulic system. One side of the upper end of the elastic sealing gasket 117 and the support plate 118 is connected through a second liquid outlet valve 113 and penetrates through the elastic sealing gasket 117 to the inside of the first cavity 107, and the other side of the upper end of the elastic sealing gasket 117 and the support plate 118 is connected through a second liquid inlet valve 108 and penetrates through the elastic sealing gasket 117 to the inside of the first cavity 107. When the pressure in the hydraulic system exceeds the set value, the second liquid outlet valve 113 can automatically open to overflow the excess hydraulic oil to prevent system overload. The lower end of the spring 105 is fixedly connected to the upper end of the support plate 118, which can increase the stability of the support plate 118, making it not easily deformed or displaced when subjected to external forces. The inner wall of the limit block 104 is slidably connected to the rod body of the guide rod 106, which can ensure the positioning and guiding of the guide rod 106 on the inner wall of the limit block 104 and prevent the guide rod 106 from shifting or misaligning during operation. The front end and the rear end of the through groove 114 are both provided with sliding grooves 116, and the outer walls of the sliders 115 are slidably connected to the inner walls of the sliding grooves 116. Through the sliding connection of the sliders 115, different working conditions and requirements can be adapted, and the friction during the movement can also be reduced to improve the operating efficiency of the system. The outer walls of the elastic sealing gasket 117 and the support plate 118 are both fixedly connected to the middle part of the inner wall of the filter body 102, which can ensure the stability of these components during operation, reduce displacement or damage caused by vibration or impact, and can also provide good sealing performance to prevent oil leakage and ensure the integrity of the system. The middle part of the inner wall of the upper shell 101 is fixedly connected with a filter screen 103, which can effectively intercept impurities and particles in the oil, ensure the cleanliness of the oil, and reduce the wear of the hydraulic system components.

[0038] Working principle: When the oil passes through the inlet 111, the impurities and particles in it are intercepted by the filter screen 103 or the filter medium, while the clean oil flows out through the outlet 110. When the filtering effect of the filter drops to a certain extent, the pressure in the system will gradually increase. When the pressure exceeds the set value, the limit block 104 will squeeze the spring 105 downward. At this time, part of the oil will overflow into the second cavity 109 through the first inlet valve 119, and then overflow into the first cavity 107 through the second inlet valve 108. When the pressure is equal to the set value, the oil will overflow into the second cavity 109 through the second outlet valve 113, and finally return to the system through the first outlet valve 112 after being filtered again, while the impurities are intercepted by the filter.

[0039] Finally, it should be noted that the above is only the preferred specific embodiment of the present invention and is not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An overflow hydraulic filter, comprising a filtering mechanism (1), characterized in that: The filtering mechanism (1) includes a filter body (102). An upper housing (101) is sleeved on the outer wall of the upper part of the filter body (102). The inner wall of the upper housing (101) is connected to the outer wall of the filter body (102) in a penetrating manner. A liquid outlet (110) is provided on one outer wall of the upper housing (101), and a liquid inlet (111) is provided on the other outer wall of the upper housing (101). A first cavity (107) is provided at the lower part of the inner wall of the filter body (102). An elastic sealing pad (117) is fixedly connected to the upper end of the first cavity (107). A support disk (118) is fixedly connected to the upper end of the elastic sealing pad (117). A guide rod (106) is fixedly connected to the middle of the upper end of the support disk (118). A spring (105) is sleeved on the rod body of the guide rod (106). A limit block (104) is fixedly connected to the upper end of the spring (105). Sliders (115) are fixedly connected to both sides of the outer wall of the limit block (104). A second cavity (109) is provided at the upper part of the inner wall of the filter body (102). Through grooves (114) are provided on both sides of the inner wall of the second cavity (109).

2. The overflow hydraulic filter according to claim 1, wherein: A first liquid outlet valve (112) is connected to one side of the upper end of the limit block (104) in a penetrating manner and penetrates through the limit block (104) to the inside of the second cavity (109). A first liquid inlet valve (119) is connected to the other side of the upper end of the limit block (104) in a penetrating manner and penetrates through the limit block (104) to the inside of the second cavity (109).

3. An overflow hydraulic filter according to claim 1, characterized in that: A second liquid outlet valve (113) is connected to one side of the upper ends of the elastic sealing pad (117) and the support disk (118) in a penetrating manner and penetrates through the elastic sealing pad (117) to the inside of the first cavity (107). A second liquid inlet valve (108) is connected to the other side of the upper ends of the elastic sealing pad (117) and the support disk (118) in a penetrating manner and penetrates through the elastic sealing pad (117) to the inside of the first cavity (107).

4. The overflow hydraulic filter according to claim 1, characterized in that: The lower end of the spring (105) is fixedly connected to the upper end of the support disk (118).

5. The overflow hydraulic filter according to claim 1, characterized in that: The inner wall of the limit block (104) is slidably connected to the rod body of the guide rod (106).

6. The overflow hydraulic filter according to claim 1, wherein: Chute grooves (116) are provided at the front end and the rear end of the through groove (114). The outer walls of the sliders (115) are slidably connected to the inner walls of the chute grooves (116).

7. The overflow hydraulic filter according to claim 1, characterized in that: The outer walls of the elastic sealing pad (117) and the support disk (118) are fixedly connected to the middle of the inner wall of the filter body (102).

8. The overflow hydraulic filter according to claim 1, characterized in that: A filter screen (103) is fixedly connected to the middle of the inner wall of the upper housing (101).

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