Hydraulic filter element with mounting spring and hydraulic oil filter

Abstract

The utility model discloses a hydraulic filter element with a mounting spring, which is used for a hydraulic oil filter and comprises a vertically arranged cylindrical framework, a filter layer for filtering hydraulic oil is arranged on the circumferential surface of the cylindrical framework, the upper ends of the framework and the filter layer are connected with an upper end cover, and the lower ends of the framework and the filter layer are connected with a lower end cover; the hydraulic oil filter comprises a cylindrical shell with the upper end open, the lower end cover is connected with a spring through a detachable connecting structure, and the spring is used for pressing the bottom wall of the cylindrical shell of the hydraulic oil filter downwards. The lower end cover of the filter element is connected with the spring through the detachable connecting structure, so that when the filter element is detached and replaced, the filter element and the spring can be assembled at a time as a whole, the spring does not need to be independently assembled in a narrow space, the phenomenon that the spring is not perpendicular to the end cover due to assembly deviation is also avoided, and the service life of the filter element is prolonged. The faults of spring toppling and filter element falling caused by fluid impact are avoided, and the influence on the performance of the hydraulic oil filter due to improper spring assembly is avoided.

Description

Technical Field

[0001] The utility model relates to the field of motor vehicle hydraulic oil filtration, in particular to the filter element structure of a hydraulic oil filter. Background Art

[0002] Motor vehicle hydraulic oil filters play the following important roles in a hydraulic system: 1. Remove impurities and contaminants in the hydraulic oil; 2. Prevent wear of hydraulic system components; 3. Ensure stable performance and long-term normal operation of the hydraulic system; 4. Prevent system blockage; 5. Extend the service life of the hydraulic oil; 6. Reduce hydraulic system failures and lower the maintenance cost of the hydraulic system.

[0003] With the development of technology, more and more components and types of components are installed in the vehicle, and the installation space in the vehicle is becoming increasingly tight. More and more vehicles arrange the filter of the hydraulic system in a more concealed place, especially under a narrow space or a lower vehicle body. This situation makes it inconvenient to replace the filter element and increases the difficulty of replacing or maintaining the filter element.

[0004] The traditional hydraulic filter element structure includes a filter element and a support spring. When replacing and maintaining the filter element, first replace the filter element, and then install the support spring. Since the diameter of the support spring is usually smaller than that of the end cover, the spring is not easy to install, especially in a narrow space, it is very difficult to install the spring, the installation of the spring is very inconvenient, and it is easy to cause the phenomenon that the spring is inclined after installation, which affects the product performance and causes customer complaints. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a hydraulic filter element with a self-installed spring, so that the filter element and the spring no longer need to be installed separately by integrating the spring, and the assembly of the filter element and the spring in the shell of the hydraulic oil filter is completed through one installation action.

[0006] To achieve the above purpose, a hydraulic filter element with a self-installed spring of the utility model is used for a hydraulic oil filter, and includes a vertically arranged cylindrical skeleton. A filter layer for filtering hydraulic oil is arranged on the circumferential surface of the cylindrical skeleton. An upper end cover is connected to the upper ends of the skeleton and the filter layer, and a lower end cover is connected to the lower ends of the skeleton and the filter layer; the hydraulic oil filter includes a cylindrical shell with an open upper end.

[0007] The lower end cover is connected with a spring through a detachable connection structure, and the spring is used to downwardly press the bottom wall of the cylindrical shell of the hydraulic oil filter.

[0008] The detachable connection structure includes a groove arranged on the lower end cover, and the groove is recessed upward from the middle of the lower end cover; a conical embedding groove with a larger upper part and a smaller lower part is connected to the middle of the groove. The outer diameter of the spring matches the maximum diameter of the conical embedding groove, and the top of the spring is embedded in the conical embedding groove from bottom to top.

[0009] The present utility model also discloses a hydraulic oil filter, which uses the above-mentioned hydraulic filter element with a built-in installation spring. The cylindrical shell of the hydraulic oil filter is threadedly connected upward with a base; an oil inlet and an oil outlet are provided on the base. The middle part of the bottom wall of the cylindrical shell protrudes downward to form a threaded cylinder, and the threaded cylinder is threadedly connected with an adjusting bolt. The adjusting bolt presses upward against the bottom end of the spring, and the large head end of the adjusting bolt is hermetically press-connected with the bottom end of the threaded cylinder.

[0010] The middle part of the base protrudes downward to form an upper connecting cylinder, the middle part of the upper end cover is connected with a lower connecting cylinder, and the inner wall of the lower connecting cylinder is in threaded cooperation with the outer wall of the upper connecting cylinder; a ring-shaped radial expansion groove is provided at the upper end of the lower connecting cylinder, and an oil outlet sealing ring is arranged in the radial expansion groove. The oil outlet sealing ring is hermetically press-fitted with the outer wall of the upper connecting cylinder;

[0011] The upper connecting cylinder communicates downward with the cylindrical framework and upward with the oil outlet;

[0012] An oil inlet sealing ring is pressed at the threaded connection between the base and the cylindrical shell; an annular oil inlet cavity is formed between the circumferential surface of the filter layer and the cylindrical shell, and the oil inlet cavity communicates with the oil inlet.

[0013] The present utility model has the following advantages:

[0014] In the present invention, the lower end cover of the filter element is connected with a spring through a detachable connection structure. In this way, when replacing the filter element, the filter element and the spring can be assembled as a whole at one time, without the need to separately assemble the spring in a narrow space, and it also avoids the phenomenon that the spring is not perpendicular to the end cover due to assembly deviation, avoids the failure of the spring to topple and the filter element to fall off caused by fluid impact, and avoids the spring not being assembled in place and affecting the performance of the hydraulic oil filter.

[0015] The spring has the ability to deform and return to its original shape; when assembling the spring into the conical groove, only by using the elasticity of the spring in the radial direction to squeeze the spring upward from the bottom into the conical groove, the spring can be connected with the conical groove. The spring embedded in the conical groove forms an interference fit with the groove wall of the conical groove under the action of the elastic restoring force, and the diameter of the end of the spring that has returned or partially returned to its original shape is larger than the lower opening of the conical groove, so it will not fall out of the conical groove.

[0016] The detachable connection structure is simple in setting, can conveniently assemble the spring into the conical groove, is convenient for the spring and the conical groove to be produced or purchased separately and then assembled together. After the filter element is scrapped, it is also convenient to disassemble and recycle the spring and the end cover separately. When disassembling, only by applying a rotational pulling force to the spring, the spring can be separated from the conical groove.

[0017] By rotating the large head end of the adjusting bolt, the pre-tightening force applied by the adjusting bolt to the spring can be conveniently changed to ensure that the filter element receives an appropriate axial force. With this structure, it is not necessary to specially manufacture different springs for different models of products. The same model of spring can form a variety of different spring pre-tightening forces in combination with the adjusting bolt to match a variety of different models of hydraulic oil filters.

[0018] The oil outlet sealing ring and the oil inlet sealing ring ensure good sealing states for the oil inlet part and the oil outlet part. Description of the Drawings

[0019] Figure 1 is a schematic structural view of the filter element in the present utility model.

[0020] Figure 2 is a schematic structural view of the lower end cover of the filter element when the spring is not assembled.

[0021] Figure 3 is a schematic structural view of the lower end cover of the filter element with the spring assembled.

[0022] Figure 4 is a schematic structural view of the hydraulic oil filter. Detailed Embodiment

[0023] As Figures 1 to 4 shown, the present utility model first provides a hydraulic filter element with a self-mounted spring for a hydraulic oil filter, including a vertically arranged cylindrical skeleton 1. A filter layer 2 for filtering hydraulic oil is provided on the circumferential surface of the cylindrical skeleton 1. An upper end cover 3 is connected to the upper ends of the skeleton and the filter layer 2, and a lower end cover 4 is connected to the lower ends of the skeleton and the filter layer 2; the hydraulic oil filter includes a cylindrical shell 5 with an open upper end,

[0024] The lower end cover 4 is connected with a spring 6 through a detachable connection structure. The spring 6 is used to downwardly press the bottom wall of the cylindrical shell 5 of the hydraulic oil filter.

[0025] In the filter element of the present invention, the lower end cover 4 is connected with a spring 6 through a detachable connection structure. In this way, when replacing the filter element, the filter element and the spring 6 can be assembled as a whole at one time, without the need to separately assemble the spring 6 in a narrow space. It also avoids the phenomenon that the spring 6 is not perpendicular to the end cover due to assembly deviation, the failure of the spring 6 to topple and the filter element to fall off caused by fluid impact, and the influence of the spring 6 not being assembled in place on the performance of the hydraulic oil filter.

[0026] The detachable connection structure includes a groove 7 provided on the lower end cover 4. The groove 7 is formed by being recessed upward from the middle of the lower end cover 4; a conical embedding groove 8 with a larger upper part and a smaller lower part is connected in the middle of the groove 7. The outer diameter of the spring 6 matches the maximum diameter of the conical embedding groove 8, and the top of the spring 6 is embedded in the conical embedding groove 8 from bottom to top.

[0027] The spring 6 has the ability to deform and return to its original shape; when assembling the spring 6 into the conical groove 8, it is only necessary to use the elasticity of the spring 6 in the radial direction to squeeze the spring 6 into the conical groove 8 from bottom to top, and the spring 6 can be connected to the conical groove 8. The spring 6 embedded in the conical groove 8 forms an interference fit with the groove wall of the conical groove 8 under the action of the elastic restoring force. The end diameter of the spring 6 that has restored or partially restored its original shape is larger than the lower opening of the conical groove 8, so it will not fall out of the conical groove 8.

[0028] The detachable connection structure is simple, which can conveniently assemble the spring 6 into the conical groove 8, facilitating the separate production or purchase of the spring 6 and the conical groove 8, and then assembling them together. After the filter element is scrapped, it is also convenient to separately recycle the spring 6 and the end cap. When disassembling, only a rotational pulling force needs to be applied to the spring 6 to separate the spring 6 from the conical groove 8.

[0029] The present utility model also provides a hydraulic oil filter, which uses the above-mentioned hydraulic filter element with a self - installed spring. The cylindrical shell 5 of the hydraulic oil filter is threadedly connected upward with a base 9; the base 9 is provided with an oil inlet 10 and an oil outlet 11.

[0030] The middle part of the bottom wall of the cylindrical shell 5 protrudes downward to form a threaded cylinder 12, and the threaded cylinder 12 is threadedly connected with an adjusting bolt 13. The adjusting bolt 13 presses upward against the bottom end of the spring 6, and the large - head end of the adjusting bolt 13 is hermetically press - connected with the bottom end of the threaded cylinder 12.

[0031] By rotating the large - head end of the adjusting bolt 13, the pre - tightening force applied by the adjusting bolt 13 to the spring 6 can be conveniently changed to ensure that the filter element receives an appropriate axial force. With this structure, it is not necessary to specially manufacture different springs 6 for different models of products. The same model of spring 6 can form a variety of different spring 6 pre - tightening forces in cooperation with the adjusting bolt 13 to match a variety of different models of hydraulic oil filters.

[0032] The middle part of the base 9 protrudes downward to form an upper connecting cylinder 14, the middle part of the upper end cap 3 is connected with a lower connecting cylinder 15, and the inner wall of the lower connecting cylinder 15 is in threaded cooperation with the outer wall of the upper connecting cylinder 14; a circular radial expansion groove 16 is provided at the upper end of the lower connecting cylinder 15, and an oil - outlet sealing ring 17 is arranged in the radial expansion groove 16. The oil - outlet sealing ring 17 is hermetically press - fitted with the outer wall of the upper connecting cylinder 14; the upper connecting cylinder 14 communicates downward with the cylindrical skeleton 1 and upward with the oil outlet 11.

[0033] An oil inlet sealing ring 18 is pressed at the threaded connection between the base 9 and the cylindrical shell 5; an annular oil inlet chamber 19 is formed between the circumferential surface of the filter layer 2 and the cylindrical shell 5, and the oil inlet chamber 19 communicates with the oil inlet 10. The oil outlet sealing ring 17 and the oil inlet sealing ring 18 ensure good sealing states for the oil inlet part and the oil outlet part.

[0034] During production, springs 6 of the same model can be matched with hydraulic oil filters of different models and sizes. By adjusting the bolt 13, the pre-tightening force of the adjusting spring 6 can be conveniently adjusted to the required magnitude.

[0035] If the spring 6 and the filter element are assembled together at the factory, the packaging box of the filter element will increase significantly in the axial direction, not only increasing the cost of the packaging box, but also reducing the number of filter elements that can be carried in the transportation space per unit volume. In the utility model, the lower end cover 4 of the filter element is connected with the spring 6 through a detachable connection structure. Before transportation, the spring 6 does not need to be assembled onto the lower end cover 4 of the filter element. The spring 6 and the filter element are packaged separately, which is more material-saving for packaging and transportation space. More filter elements and springs 6 can be carried in the unit transportation space. Therefore, the utility model adopts a detachable connection structure to connect the spring 6 and the lower end cover 4.

[0036] In all links after transportation and before use, the spring 6 can be assembled onto the lower end cover 4. When a certain hydraulic oil filter needs to replace the filter element, the cylindrical shell 5 is rotated integrally at the vehicle, the cylindrical shell 5 is removed from the base 9, and then the filter element and the end cover are pulled out upward as a whole. A new filter element with the spring 6 is placed into the cylindrical shell 5, and then the cylindrical shell 5 is rotated upward and assembled onto the base 9, thus completing the task of replacing the filter element. Since there is no need to carefully install the spring 6 between the end cover and the bottom wall of the cylindrical shell 5 and ensure that the spring 6 is vertically installed, the efficiency of filter element assembly is greatly improved.

[0037] When the hydraulic oil filter is working, the hydraulic oil to be filtered enters the oil inlet chamber 19 through the oil inlet 10, then passes through the filter layer radially. After being filtered when passing through the filter layer, the filtered hydraulic oil enters the cylindrical skeleton 1, and flows downstream through the upper connecting cylinder 14, the lower connecting cylinder 15 and the oil outlet 11, providing clean filtered hydraulic oil to the downstream.

[0038] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be modified or equivalently replaced, and any modification or partial replacement without departing from the spirit and scope of the present invention shall be covered by the scope of the claims of the present invention.

Claims

1. A hydraulic filter element with a built-in installation spring, which is used for a hydraulic oil filter and includes a vertically arranged cylindrical skeleton. The circumferential surface of the cylindrical skeleton is provided with a filter layer for filtering hydraulic oil. The upper end of the skeleton and the filter layer is connected with an upper end cover, and the lower end of the skeleton and the filter layer is connected with a lower end cover; the hydraulic oil filter includes a cylindrical shell with an open upper end, It is characterized in that: The lower end cover is connected with a spring through a detachable connection structure, and the spring is used to downwardly press the bottom wall of the cylindrical shell of the hydraulic oil filter.

2. The hydraulic filter element with a self - installed spring according to claim 1, wherein: The detachable connection structure includes a groove provided on the lower end cover, and the groove is formed by downwardly and upwardly recessing from the middle of the lower end cover; a tapered insert groove with a large upper part and a small lower part is connected in the middle of the groove. The outer diameter of the spring matches the maximum diameter of the tapered insert groove, and the top of the spring is inserted into the tapered insert groove from bottom to top.

3. A hydraulic oil filter, which uses the hydraulic filter element with a built-in installation spring described in claim 1 or 2. The cylindrical shell of the hydraulic oil filter is threadedly connected upward with a base; the base is provided with an oil inlet and an oil outlet, and is characterized in that: A threaded cylinder protrudes downward from the middle of the bottom wall of the cylindrical shell, and the threaded cylinder is threadedly connected with an adjusting bolt. The adjusting bolt upwardly presses the bottom end of the spring, and the large head end of the adjusting bolt is hermetically pressed against the bottom end of the threaded cylinder.

4. The hydraulic oil filter according to claim 3, wherein: An upper connecting cylinder protrudes downward from the middle of the base, a lower connecting cylinder is connected to the middle of the upper end cover, and the inner wall of the lower connecting cylinder is in threaded cooperation with the outer wall of the upper connecting cylinder; a circular radial expansion groove is provided at the upper end of the lower connecting cylinder, and an oil outlet sealing ring is arranged in the radial expansion groove. The oil outlet sealing ring is tightly pressed and sealed with the outer wall of the upper connecting cylinder; The upper connecting cylinder is connected downward with the cylindrical skeleton and upward with the oil outlet; An oil inlet sealing ring is pressed at the threaded connection between the base and the cylindrical shell; an annular oil inlet cavity is formed between the circumferential surface of the filter layer and the cylindrical shell, and the oil inlet cavity is communicated with the oil inlet.

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