JPH0676646U - Radially sealed cylindrical air filter element - Google Patents

Abstract

(57) [Summary] [Purpose] A cylindrical filter element of the radial direction sealing type, in which a protective perforated cylinder covering the inner and outer peripheries of a hollow cylindrical filter material is made of hard resin. [Constitution] The inner and outer circumferences of the hollow cylindrical filter material are
Covered with a hard resin perforated cylinder at the same height as the material, to one end of it
A structure in which an opening end lid having a ventilation hole in the center and a closing end lid at the other end are respectively cast as elastic members and an annular seal area is provided on the inner circumference of the ventilation end of the opening end lid.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention mainly relates to an element of an air filter for an engine, and more specifically, it is used in an engine mounted on a tower such as a heavy vehicle and an agricultural tractor, and is a relatively large cylindrical air filter in which the element is incorporated. With regard to the type of element that forms a radial seal with.

[0002]

[Prior art]

 Conventionally, in many examples of assembling an element into a case, there is a method in which the outlet of the case end wall and the periphery of the element opening end outlet are hermetically sealed by an annular gasket by pressing and tightening in the axial direction. As an example of a seal, an annular seal area is provided on the inner periphery of the center outlet of the element opening end lid that is made of an elastic material, and when it is assembled to the case, it is fitted to the outer periphery of the cylindrical outlet protruding toward the center inside of the case end wall. There is a method in which it is compressed and sealed in the radial direction.

[0003]

[Problems to be solved by the device]

In the radial direction sealing method, even if the seal part is slightly displaced in the axial direction after the element is assembled, the sealed state is maintained by being driven. Since there is no need to have enough strength to withstand, and it is sufficient to press it to hold it in place, there is an example in which the inner and outer perforated cylinders for protecting the filter material are thin steel plates, and the case is also made of resin. As a result, it is effective in terms of weight reduction and price reduction. However, since the steel plate is used for the inner and outer perforated cylinders for protecting the filter material as a book-carrying steel plate, the limit is about 0.5 ^mm , so the weight accounts for about 50% of the total element weight. In addition, the cost of raw materials is higher than that of the filter material and the elastic soft resin at both ends, which is an obstacle to more effective weight reduction and price reduction. Met.

[0004]

[Means for Solving the Problems]

 In the radial seal type element, the inner and outer perforated cylinders for protecting the filter material are replaced by the steel plates up to this point and made of a hard resin having a plate thickness having a suitable pressure resistance.

[0005]

【Example】

 In FIG. 1, there is an air inlet 13 on the side wall 11 of the cylindrical case 10 and an air outlet 15 at the center of the closed end wall 14 of the case 10 so that it projects outside and inside the closed end wall 14. Positioned and secured to the closed end wall. On the open end side of the case 10, the end of the side wall 11 serves as an annular flange 12 which is directed outward in the radial direction. A cover 16 is joined to this at the time of assembly, and bolts 17, nuts 18, and lock nuts 19 are tightened at a plurality of points. The filter element 20 has an inner perforated tube 22 made of a hard resin whose inner and outer peripheries are the same height as the filter paper 21. The outer perforated cylinder 23 is covered, and both ends thereof are cast-molded by an open end lid 24 and a closed end lid 25 made of urethane foam material having a hardness of soft rubber. As shown in FIG. 3, the opening end lid 24 is slightly thicker, and the inner circumference of the opening 24 'is formed into an inverted conical shape 24 ", and most of it is made slightly smaller than the outer diameter of the outlet 15 of the case 10, When the element 20 is assembled, the inverted conical shape 24 "is compressed to form a radial seal. A plurality of arcuate projections 26, 27 are provided on the outer side in the axial direction of the open end cover 24 and the closed end cover 25 at equal intervals in the circumferential direction, and the inside of the closed end wall 14 of the case 10 and the inside of the cover 16 are covered. To hold the element 20 in place. Therefore, the element 20 is hardly pressed in the axial direction, and the inner perforated cylinder 22 and the outer perforated cylinder 23 are made of a hard resin having a thickness capable of withstanding the pressure generated by the air flow during use. Even if it is slightly thicker than a plate, the weight will be reduced and the raw material cost will be reduced.

[0006]

[Effect of device]

 (1) Compared with the conventional radial seal type filter element, the weight of the filter material and the cost is further reduced by using a hard resin instead of a steel plate for the porous cylinder for protection. Becomes (2) Because the perforated cylinder made of hard resin can be colored in the raw material, making it a bright color makes it easy to distinguish it from other elements in stock items for replenishment, and also has a unique appearance. (3) In the case of incinerating used elements, in the case of a steel plate perforated cylinder, the double labor of treating the debris of the steel plate cylinder was required in addition to the ash dust treatment after incineration. As all the elements of the cylinder are ash dust as an element, the treatment after incineration is easy.

[Brief description of drawings]

FIG. 1 is a half cross-sectional side view of an air filter incorporating the element of the present invention.

FIG. 2 is a perspective external view of an element according to the present invention.

FIG. 3 is an enlarged partial cutaway view of the outlet region of the open end lid of the element according to the present invention.

[Explanation of symbols]

 10 case 11 side wall 12 flange 13 air inlet 14 closed end wall 15 air outlet 16 cover 17 bolt 18 nut 19 lock nut 20 element 21 filter paper 22 inner perforated tube 23 outer perforated tube 24 open end lid 24 'opening 24 " Inverted cone shape 25 Closing end lid 26 Protrusion 27 Protrusion

Claims (1)

[Scope of utility model registration request] 1. The inner and outer circumferences of a hollow cylindrical filter material are
The filter is covered with a perforated cylinder having the same height as the cylindrical shape of the filter medium, and an opening end lid having a ventilation hole in the center is fixed to one end thereof and a closing end lid is fixed to the other end as elastic members. By incorporating a filter element, which has an annular seal area around the inner circumference of the mouth, into the case, the annular seal area is compressed, and the dust-containing air before the filtration enters the clean air after the filtration. A radial air-sealing cylindrical air filter element, characterized in that, in an element having a structure that serves as a radial seal, the porous cylinder covering the inner and outer circumferences of the cylindrical filter material is made of hard resin.