CN100392234C - air filter - Google Patents

Abstract

An air filter, the filter element (30) is held on the holding frame (Fh) and the formed assembly (AS) is accommodated in the filter case (1), so that the filter case The body (1) is divided into a dirty side (9) and a clean side (10), so that the unclean air flowing into the dirty side (9) is cleaned by the filter element (30), and then flows into the clean side (10). The element assembly (AS) consists of an individual filter element (30) and its holding frame (Fh), which can be exchanged separately from the holding frame (Fh). It is an air filter connected to the air intake system of a motorcycle engine. It can replace the filter element alone, which can reduce its maintenance cost and save resources at the same time.

Description

air filter

technical field

The present invention relates to an air cleaner, and mainly relates to an air cleaner suitable for an air intake system of a vehicle engine such as a motorcycle.

Background technique

In the past, as an air filter connected to the air intake system of a motorcycle engine, a filter element assembly integrally formed with a filter element and a holding frame holding it was detachably mounted on a detachable filter. This is known (for example, with reference to Japanese Patent Application Publication No. 2-39627).

However, in such an original air filter, since the filter element and its holding frame are combined into an inseparable one, when replacing the filter element as a replacement part, the still usable holding frame has to be replaced with the filter element. As a result, many discarded parts are generated, which is not ideal in terms of effective use of resources, and there is a problem that an additional economic burden is imposed on the user.

In view of such circumstances, an object of the present invention is to provide a novel air cleaner in which a filter element can be replaced separately from its holding frame and which can solve the aforementioned problems.

Contents of the invention

In order to achieve the aforementioned object, according to the air cleaner of the present invention, the filter element is held on the holding frame and the formed element assembly is accommodated in the filter housing, thereby dividing the inside of the filter housing into the dirty side. and the clean side, after the uncleaned air flowing into the dirty side is cleaned by the filter element, it flows into the clean side. The cleaning element is replaced separately from the retaining frame, and the aforementioned retaining frame is detachably mounted on the filter housing by the first retaining frame supported between the housing body of the filter housing and the joint surface of the cover to hold the aforementioned filter element. The second holding frame on the filter housing is formed by crimping the sealing body integrally formed with the aforementioned filter element on the first holding frame and sandwiching it between the first holding frame and the second holding frame, The filter element is supported on the retainer bar.

According to such a configuration, the filter element can be separated from the holding frame and replaced, and the replacement cost can be greatly reduced. In addition, since the existing discarded holding frame can be reused, resources can be utilized effectively.

In addition, the air cleaner of the present invention is characterized in that, on the basis of the above-mentioned structure, the aforementioned holding frame is detachably mounted on a first holding frame fixed to the filter case and holding the aforementioned filter element. The second holding frame on the filter housing is configured, and the aforementioned filter element is crimped on the first holding frame, and sandwiched between the first holding frame and the second holding frame.

According to such a configuration, the filter element can be separated from the holding frame and replaced, and the replacement cost can be greatly reduced. In addition, since the existing discarded holding frame can be reused, resources can be utilized effectively. Furthermore, the assembly of the filter element on the filter housing is facilitated.

Furthermore, on the basis of the above-mentioned structure, if the sealing body is integrally fixed on the outer periphery of the filter element, the filter element can be replaced separately from the holding frame, and the replacement cost can be greatly reduced. In addition, through the original The reuse of the discarded holding frame can effectively utilize resources. Furthermore, the assembly of the filter element on the filter housing is facilitated. Again, conformality of the filter element is easy.

Furthermore, on the basis of the aforementioned constitution, if a flame trap for protecting the filter element from backfire is arranged on the aforementioned first holding frame on the aforementioned clean side, the filter element can be separated from the holding frame and Replacement can greatly reduce the replacement cost. In addition, resources can be effectively utilized by reusing the originally discarded holding frame. In addition, the assembly of the filter element on the filter housing is facilitated, the shape retention of the filter element is easy and, moreover, the filter element can be protected against flashback.

Furthermore, on the basis of the aforementioned structure, if the aforementioned first holding frame is supported between the joint surface of the housing body and the cover of the filter housing, the filter element can be separated from the holding frame and replaced. The replacement cost can be greatly reduced, and resources can be effectively utilized by reusing the originally discarded holding frame. In addition, assembly of the filter element to the filter housing is facilitated, conformal retention of the filter element is easy, and moreover, the filter element can be protected against backfiring. Furthermore, assembly of the filter element, housing body and cover is easy.

Description of drawings

Fig. 1 is a partially cutaway overall side view of the air cleaner of the present invention.

FIG. 2 is a plan view in the direction of arrow 2 in FIG. 1 .

FIG. 3 is an enlarged view of a portion surrounded by a virtual line in the direction of arrow 3 in FIG. 1 .

FIG. 4 is an enlarged view of a surrounded portion in the direction of arrow 4 in FIG. 1 .

Fig. 5 is an exploded cross-sectional view of a filter element holding portion of the aforementioned air cleaner.

FIG. 6 is a view in the direction of arrow 6 in FIG. 5 .

FIG. 7 is a view in the direction of arrow 7 in FIG. 6 .

Fig. 8 is a cross-sectional view along line 8-8 of Fig. 6 .

Detailed ways

The implementation of the present invention will be described below according to the embodiments of the present invention shown in the accompanying drawings.

In Fig. 1 and Fig. 2, the filter case 1 of the air cleaner Ac is made of hard synthetic resin, and is divided into a case body 2 and a cover body 3, and their split opening end faces are butted together, and there are many A small screw 4 joins outward flanges 2a, 3a formed on their peripheries into one body and forms a closed shape. On the split opening end faces of the housing body 2 and the cover body 3, annular fitting grooves 5, 6 that are consistent with each other are respectively formed, and in these fitting grooves 5, 6, through packings 7, 8, the airtight The outer edge portion ( FIG. 3 ) of the first holding frame 17 of the holding frame Fh described later is clamped and fixed.

In the filter housing 1, the filter element assembly AS described in detail later is kept between the connection part of the housing body 2 and the cover body 3, and the filter housing is connected by the filter element assembly AS. 1 is divided into a dirty side 9 on its cover body 3 side and a clean side 10 on the housing body 2 side.

On the cover 3 of the filter housing 1, the suction passage 11 passing through its bottom wall 3b is supported, the outer end of the suction passage 11 is open to the atmosphere, and its inner end is connected to the dirty side 9 connected. On the housing body 2 of the filter housing 1, a discharge path 12 passing through its end wall 2b is supported. The trachea In is connected.

On the upper wall 3c of the aforementioned cover body 3, the inlet and outlet 14 for entering and exiting the filter element described later in the filter housing 1 is opened, and then in the vicinity of the inlet and outlet 14, the first outlet for locking the latter is opened. 2 Locking holes 13 on the upper edge of the holding frame 18. The aforementioned port 14 is closed so that it can be opened and closed by a cover 15 fixed there by screws.

Next, is the gist of the present invention. The structure of the filter element assembly AS is described with reference to FIGS. 1 to 8. The filter element assembly AS is composed of the first and second holding frames 17, 18 and the element unit 19 clamped between the holding frames 17, 18. , These components are assembled in the filter housing 1. Furthermore, the aforementioned first and second holding frames 17 and 18 constitute the holding frame Fh in the present invention.

The above-mentioned first holding frame 17 is made of hard synthetic resin and is formed in a square frame shape, and a flame trap 23 is bridged over the window hole 22 . The aforementioned first holding frame 17 has a short angular tube portion 17a, an outward flange portion 17b extending outward from the outer edge of the angular tube portion 17a approximately at right angles, and an outward flange portion 17b extending approximately at right angles from the inner edge of the angular tube portion 17a. The inward flange portion 17c extending inwardly, and the aforementioned window hole 22 is edged by the inner peripheral edge of the inward flange portion 17c. In addition, an outer edge portion 17d with a T-shaped cross section is integrally formed on the outer end of the outward flange portion 17b, and the outer edge portion 17d is airtightly fitted on the joint surface of the housing body 2 and the cover body 3. . In addition, a protruding piece 17e is protrudingly provided on the lower edge of the inward flange portion 17c, and two insertion holes 24 are formed through the protruding piece 17e at intervals in the width direction.

The aforementioned flame trap 23 is formed into a quadrangular shape by a plain woven metal mesh, and as shown in FIG. The inclined lower edge portion 23c is longer in the vertical direction than the aforementioned inclined upper edge portion 23b, so the inclination is gentle. And this flame trap 23, its longitudinal section forms the shape that protrudes toward the element unit 19 described later, and its upper and lower edges are connected by means 25 such as thermal caulking and the upper and lower inner edges of the window hole 22 of the first holding frame 17. Connect into one.

The aforementioned second holding frame 18 is formed by hard synthetic resin into a quadrangular frame shape through which the window hole 27 is opened. As shown in FIGS. The element holding portion 18a formed of a rectangular cylinder having a trapezoidal cross-section has a stepped fitting portion 18g for fitting the element unit 19 on one side of the element holding portion 18a on the element unit 19 side. In addition, two locking portions 18b, 18b are integrally formed on the upper side of the element holding portion 18a, and two insertion portions 18c, 18c, and two locking portions 18b, 18b are integrally formed on the lower side thereof. The upper edge of the part 18a protrudes upwards and is arranged in an angular shape, and is bent back and bent from the inner end of the outer peripheral edge of the component holding part 18a to form a U-shaped section, and its free end is outside the component holding part 18a, and a hook is integrally formed inside it Shaped locking hook 18d. Furthermore, the locking hook 18d is detachably engaged with the locking hole 13 opened in the cover body 3 when the filter case 1 is assembled as will be described in detail later. In addition, the aforementioned two insertion portions 18c, 18c are provided integrally projecting downward on the lower edge of the component holding portion 18a, and these insertion portions 18c, 18c are freely inserted into the two insertion holes of the aforementioned first holding frame 17. 24, 24, as shown clearly in FIG. 6, on both sides of the middle part in the up-down direction of the angular cylindrical element holding part 18a, a pair of mountain-shaped protruding pieces 18e, 18e are protrudingly provided. Between the protruding pieces 18e, 18e, a bridge-shaped misinstallation prevention piece 18f is integrally formed. The misinstallation prevention piece 18f is inserted into a groove of the filter element 30 described later to prevent the element unit 19 from being misinstalled.

The element unit 19 sandwiched and held between the first and second holding frames 17 and 18 is composed of a filter element 30 and a sealing body 31 integrally formed with an interference on its outer periphery. The aforementioned filter element 30 folds thin dry filter paper in a zigzag shape up and down at a folding distance of 2.5 to 4 mm and forms a quadrangular shape when viewed from the front. In addition, the aforementioned sealing body 31 is made of foamed urine with a film. The alkane resin is formed into a square ring shape, and an element holding portion 31a constituted by a fitting step portion for fitting the corner portion of the filter element 30 is integrally formed on the inner peripheral surface thereof. Moreover, on the element holding portion 31a, the corner portion of the cleaning side of the aforementioned filter element 30 is fitted with an interference of 1.5 mm to form an integral body, so that the shape retention when the filter element 30 is used as a single body can be ensured. The element unit 19 can be configured.

By fitting the stepped fitting portion 18g of the second holding frame 18 to the element holding portion 31a of the sealing body 31 in the element unit 19, the element unit 19 is assembled so as to overlap the inside of the second holding frame 18 in the radial direction. . Moreover, the combination of the element unit 19 and the second holding frame 18 is loaded into the filter housing 1 through the opening 14 opened on the filter housing 1, and is mounted on the housing body integrally clamped. 2 and the joint surface of the cover 3 on the first holding frame 17. That is, after inserting the two insertion portions 18c, 18c of the lower edge of the second holding frame 18 into the two insertion holes 24, 24 of the lower edge of the first holding frame 17, the sealing body 31 is pressed against the first holding frame 17. The locking hooks 18d, 18d of the second holding frame 18 are engaged in the locking holes 13 on the upper edge of the cover body 3 on the side surface of the cover body 3 . At this time, the erroneous installation preventing piece 18 f is inserted into the groove of the filter element 30 , so that the second holding frame 18 is not erroneously attached to the element unit 19 .

Through the above assembly, the filter element assembly AS composed of the first and second holding frames 17, 18 and the element unit 19 is installed in the joint of the housing body 2 and the cover body 3 in the filter housing 1. partly on. Furthermore, the flat central portion 23 a of the flame trap 23 faces the side surface of the filter element 30 with a slight gap.

Next, the action of this embodiment will be described.

The suction negative pressure generated by the operation of the engine, after passing through the suction system In, the clean side 10 of the filter housing 1 and the filter element 30, acts on the dirty side 9, whereby the air flows in through the suction path 11. dirty side9. The inflow atmosphere in the dirty side 9, that is, the unclean air, is cleaned by the filter element 30, enters the clean side 10, and is introduced into the air intake system In of the engine through the discharge path 12.

At this time, the flame trap 23 can protect the filter element 30 from backfire of the engine.

However, due to the use of the air cleaner Ac, the filter element 30 is gradually soiled by dust in the atmosphere and cannot perform desired functions, so it is necessary to replace it periodically. Together with the second holding frame 18, the element unit 19 is removed from the filter housing 1 in the reverse order of the aforementioned assembly, and then the element unit 19 is separated from the second holding frame 18. Then, replace the dirty element unit 19, and after holding the new element unit 19 on the second holding frame 18 that can still be used, install it in the filter housing 1 again by the aforementioned method.

As described above, the element unit 19 can be separated from the first and second holding frames 17 and 18 for replacement, and the usable first and second holding frames 17 and 18, namely the holding frame Fh, can be reused as they are. As a result, the maintenance cost of the air filter is greatly reduced, and the waste of resources is also suppressed.

As mentioned above, although the Example of this invention was demonstrated, this invention is not limited to this Example, Various Example is possible within the scope of this invention. For example, in the foregoing embodiments, the case where the air filter is implemented in the air intake system of the engine has been described, but it is also possible to implement it in other equipment that requires clean air. In addition, in the foregoing embodiments, the filter element is replaced together with the sealing body, or only the filter element itself can be replaced. In this case, it is best to make the filter element itself capable of retaining its shape.

Claims (5)

1. An air filter, the filter element (30) is held on the holding frame (Fh) and the formed element assembly (AS) is accommodated in the filter housing (1), so that the filter The cleaner housing (1) is divided into a dirty side (9) and a clean side (10), so that the uncleaned air flowing into the dirty side (9) is cleaned by the filter element (30), and then flows into the clean side (10) ), characterized in that, The aforementioned element assembly (AS) is composed of a separate filter element (30) and its retaining frame (Fh), enabling the filter element (30) to be replaced separately from the retaining frame (Fh), The aforementioned holding frame (Fh) consists of the first holding frame (17) supported between the joint surface of the housing body (2) and the cover (3) of the filter housing (1) and the aforementioned filter element ( 30) and detachably mounted on the filter housing (1) to form a second holding frame (18), By crimping the sealing body (31) integrally formed with the aforementioned filter element (30) on the first holding frame (17), and clamping between the first holding frame (17) and the second holding frame (18) In between, the filter element (30) is supported on the holding frame (Fh). 2. The air filter according to claim 1, characterized in that, on the aforementioned first holding frame (17) on the aforementioned clean side (10) side, a device for protecting the filter element (30) from Tempered flame trap (23). 3. The air filter according to claim 1 or 2, characterized in that, the aforementioned filter element (30) is formed by folding thin filter paper in a zigzag shape along the up and down direction, and is quadrangular when viewed from the front. The aforementioned second holding frame (18) has an element holding portion (18a) made of an angular cylinder, In the middle part of the up-down direction of the aforementioned element holding portion (18a), a misinstallation prevention piece (18f) is provided, and the misinstallation prevention piece (18f) is inserted into the groove of the aforementioned filter element (30) to prevent the Misinstallation of the element unit (19) composed of the element (30) and the sealing body (31). 4. The air filter according to claim 1 or 2, characterized in that, the upper wall of the cover body (3) is provided with an inlet and outlet (14) for entering and leaving the aforementioned filter element (30), the inlet and outlet ( 14) It is closed openably and closably by a cover (15), and a locking hole (13) for locking the upper edge of the aforementioned second holding frame (18) is opened inside the cover (15). 5. The air filter according to claim 3, characterized in that, the upper wall of the cover body (3) is provided with an entrance (14) for entering and exiting the aforementioned filter element (30), and the entrance (14) It is closed openably and closably by a cover (15), and a locking hole (13) for locking the upper edge of the second holding frame (18) is opened inside the cover (15).

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