JP2005098154A - Fixed hook structure of air cleaner housing cover - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To securely fix a housing cover to a housing even when an impact pressure or a varying pressure is applied from the inside to the housing cover. <P>SOLUTION: This fixed hook structure comprises a holding part 21 holding the housing 1 and the housing cover of an air cleaner for the engine in the axial direction by an elastic force and fixing the housing cover to the housing. A reinforcement plate 25 covering the outside of the holding part in the axial direction is fitted to a fixed hook 20. An axial clearance in such a range that, least, the holding part is installable to the housing and the housing cover and, maximally, the airtightness of the housing cover can be secured may be formed between the reinforcement plate and the holding part. Also, the reinforcement plate may be fixed to the fixed hook. On the other hand, the reinforcement plate can be formed in such a shape that can be axially fitted to the holding part. In addition, the reinforcement plate may be formed in such a shape that can be radially fitted to the holding part. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a fixing hook structure for a housing cover of an air cleaner for an engine.

  2. Description of the Related Art Conventionally, for example, in an air cleaner for an engine of a vehicle such as a truck, there is a center bolt structure in which a center cover of an air cleaner is fixed with a nut as a structure for fixing a housing cover of the air cleaner to the housing. However, this center bolt structure has a problem that workability at the time of air cleaner replacement is poor and the structure is complicated, resulting in high cost. Therefore, a fixed hook structure for fixing the housing cover to the housing by a fixed hook has been developed (see, for example, Patent Documents 1 and 2).

  As shown in FIG. 5, this fixed hook structure is made of an elastic plate, and uses a fixed hook 103 that holds the housing 101 and the housing cover 102 from both sides in the axial direction by the elastic force thereof. The fixing hook 103 has, for example, a holding portion 104 having a substantially C-shaped longitudinal (axial) cross section, and the housing cover 102 is fixed to the housing 101 by the holding portion 104. In addition, a plurality of fixing hooks 103 are disposed, for example, at substantially equal intervals on the entire periphery of the housing cover 102.

With this fixed hook structure, the workability at the time of air cleaner replacement is greatly improved, and the cost is reduced due to the simplification of the structure.
Japanese Utility Model Publication No. 6-22555 (page 4, Fig. 1-2) JP-A-8-128365 (FIG. 1)

  As described above, the conventional fixing structure of the air cleaner housing cover can greatly improve the workability at the time of air cleaner replacement and can reduce the cost due to the simplification of the structure.

  However, there is a case where a large impact pressure is applied from the inside to the housing cover of the air cleaner or a fluctuating pressure due to intake air pulsation is applied due to the occurrence of a backfire of the engine. At this time, if the housing cover is simply fixed only by the elastic force of the fixing hook, the fixing hook temporarily extends due to the impact pressure or fluctuating pressure, and the airtightness of the housing cover cannot be secured, or the fixing hook is not secured. Problems such as deformation.

  The present invention was made to solve such a problem, for example, even when impact pressure or fluctuating pressure is applied to the housing cover of the air cleaner from the inside, the housing cover can be securely fixed to the housing. It is an object of the present invention to provide a fixing hook structure for an air cleaner housing cover.

  In order to solve the above-mentioned problems, the means employed by the present invention is an air cleaner housing provided with a clamping portion that clamps the housing and the housing cover of the engine air cleaner in the axial direction by elastic force to fix the housing cover to the housing. In the cover fixing hook structure, a reinforcing plate that covers the outside of the clamping portion in the axial direction is attached to the fixing hook.

  As described above, since the reinforcing plate that covers the outside of the sandwiching portion in the axial direction is attached to the sandwiching portion, the sandwiching portion of the fixed hook is also provided with this reinforcement even when a large impact pressure or fluctuating pressure is applied to the housing cover from the inside. The plate keeps the axial extension within a certain range.

  An axial gap may be provided between the reinforcing plate and the sandwiching portion so that the sandwiching portion can be attached to the housing and the housing cover at the minimum and the airtightness of the housing cover can be ensured at the maximum.

  By doing so, the reinforcing plate can be attached to and detached from the housing and the housing cover in a state where the reinforcing plate is attached to the holding portion of the fixing hook. It will not be damaged. On the other hand, even when a large impact pressure or fluctuating pressure is applied to the housing cover from the inside, for example, the extension of the fixing hook is suppressed within a range in which the airtightness of the housing cover can be ensured, and the function of the air cleaner is impaired. Absent.

  In this case, the reinforcing plate may be fixed to the fixing hook. By doing in this way, it becomes unnecessary to attach a reinforcement board to a clamping part every time it attaches or detaches to a housing cover, and workability | operativity at the time of housing cover attachment / detachment improves further.

  On the other hand, the reinforcing plate can also be formed in a shape that closely contacts the clamping portion in the axial direction. In this case, after the fixing hook is attached to the housing and the housing cover, the reinforcing plate can be attached by being fitted to the holding portion of the fixing hook from the circumferential direction. The workability at the time of attaching and detaching the housing cover is slightly inferior to that of the above-described case where the axial clearance is provided between the reinforcing plate and the sandwiching portion, but the extension of the sandwiching portion of the fixed hook can be suppressed almost completely. In addition, the work for attaching the reinforcing plate to the fixing hook in advance can be omitted.

  A fixing hook structure for an air cleaner housing cover according to the present invention is a fixing hook structure for an air cleaner housing cover having a clamping portion for clamping the housing cover to the housing by elastically clamping the housing and the housing cover of the engine air cleaner in the axial direction. In this case, the reinforcing plate that covers the outside of the clamping portion in the axial direction is attached to the fixing hook, so that the housing cover can be securely fixed to the housing even when a large impact pressure or fluctuating pressure is applied to the housing cover from the inside. There is an excellent effect of being able to.

  The best mode for carrying out the invention of the fixing hook structure of the air cleaner housing cover according to the present invention will be described in detail with reference to FIGS.

  As shown in FIG. 1, a housing 1 of an air cleaner is formed in a cylindrical shape, an air inlet 2 is disposed on a side wall thereof, and an air outlet 3 is disposed on one end thereof. A housing cover 10 is attached to the other end of the housing 1. An air cleaner element 5 is housed in the housing 1 between the one end of the housing 1 and the housing cover 10 in an airtight manner.

  As shown in FIGS. 1 and 2, the housing cover 10 is fixed to the housing 1 at three locations in the circumferential direction by fixing hooks 20 whose outer sides are covered with a reinforcing plate 25. As shown in FIG. 3, the housing cover 10 is hermetically attached to the housing 1 by a seal 6. The above-described fixing hook 20 is made of an elastic plate, and is formed of a sandwiching portion 21 having an approximately C-shaped axial section and a knob portion 22 having one end bent and extended.

  The fixed hook 20 has one end portion of the clamping portion 21 engaged with the engagement hole 12 of the flange 11 of the housing cover 10, and the other end portion thereof engaged with the flange 4 of the housing 1 with the engaged one end portion as a fulcrum. Stopped. As described above, the holding portion 21 of the fixing hook 20 holds the housing 1 and the housing cover 10 in the axial direction by the elastic force, and fixes the housing cover 10 to the housing 1.

  A substantially C-shaped reinforcing plate 25 that covers the outside in the axial direction and the circumferential direction is attached to the sandwiching portion 21 of the fixed hook 20. The reinforcing plate 25 is preliminarily provided with an axial gap formed by predetermined gaps d1 and d2 between the housing 1 side of the sandwiching portion 21 and the reinforcing plate 25, and spot welding is performed on the housing cover 10 side of the sandwiching portion 21. 26 is welded (fixed).

  The axial gap formed by the predetermined gaps d1 and d2 can be attached to the housing 1 and the housing cover 10 by extending the clamping part 21 at the minimum, and at the maximum, the housing cover 10 is temporarily clamped by the internal pressure. Even if it comes out against the elastic force, the seal 6 or the like is set so as to ensure airtightness.

  Therefore, when the fixing hook 20 is attached to the housing 1 and the housing cover 10, the holding portion 21 of the fixing hook 20 is held and one end portion of the clamping portion 21 is engaged with the flange 11 of the housing cover 10 as in the past. It is only necessary to engage with the hole 12 and to engage the other end with the flange 4 of the housing 1 against its elastic force. In particular, since the reinforcing plate 25 is welded on the housing cover 10 side of the sandwiching portion 21 that serves as a fulcrum, the fixing hook 20 can be easily attached. Therefore, even if the reinforcing plate 25 is attached, the workability when the housing cover 10 is attached / detached is not impaired.

  According to the fixed hook structure of the air cleaner housing cover, since the reinforcing plate 25 that covers the outside of the holding part 21 of the fixed hook 20 in the axial direction is attached to the holding part 21, the holding part 21 of the fixed hook 20 is, for example, an engine Even when a large impact pressure or fluctuating pressure is applied to the housing cover 10 from the inside due to backfire, intake pulsation, or the like, the axial extension of the reinforcing plate 25 is suppressed within a certain range. Therefore, the housing cover 10 can be securely fixed to the housing 1, and the occurrence of an abnormality such that the airtightness of the housing cover 10 cannot be ensured can be prevented.

  Further, since the reinforcing plate 25 is spot-welded to the holding portion 21 of the fixing hook 20, it is not necessary to attach the reinforcing plate 25 to the holding portion 21 every time the housing cover 10 is attached / detached, and workability when the housing cover 10 is attached / detached. Will further improve.

  On the other hand, as shown in FIG. 4, the reinforcing plate 35 can be formed in a shape that is in close contact with the pinching portion 31 of the fixed hook 30 at least in the axial direction, and preferably in a shape that is also in close contact with the radial direction. In this case, after attaching the fixing hook 30 to the housing 36 and the housing cover 37, the reinforcing plate 35 is attached to the sandwiching portion 31 by fitting it in the circumferential direction. The workability at the time of attaching and detaching the housing cover is slightly inferior to that of the reinforcing plate 25 provided with the above-described axial gap, but the extension of the holding portion 31 of the fixed hook 30 can be suppressed almost completely. Further, the work for attaching the reinforcing plate 35 to the fixing hook 30 in advance can be omitted.

  In addition, the shape of the fixed hook and the reinforcing plate is not limited to the shape in which the axial section of the clamping portion is substantially C-shaped like the above-described fixed hooks 20 and 30 and the reinforcing plates 25 and 35. There are various shapes.

  The axial gap between the reinforcing plate and the holding portion of the fixing hook does not necessarily need to be set so as to be attachable to the housing and the housing cover at the minimum and to ensure the airtightness of the housing cover at the maximum. It can also be set with other factors in mind.

  The attachment structure of the reinforcing plate to the fixing hook is not limited to welding or fixing, and other attachment structures such as engagement can be used.

  The fixing structure of the air cleaner housing cover of the present invention can securely fix the housing cover to the housing even when a large impact pressure or fluctuating pressure is applied to the housing cover from the inside. Although it is optimally used as a fixing hook for a housing cover of an air cleaner for a vehicle engine, it can be widely used as a fixing hook structure for fixing a housing cover or the like in another field to the housing.

It is front sectional drawing which shows the fixed hook structure of the air cleaner housing cover which concerns on this invention. It is a side view which shows the air cleaner of FIG. It is sectional drawing which shows the fixed hook 20 of FIG. It is sectional drawing which shows another fixed hook 30. FIG. It is sectional drawing which shows the fixed hook structure of the conventional air cleaner housing cover.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Air inlet 3 Air outlet 4 Flange 5 Air cleaner element 6 Seal 10 Housing cover 11 Flange 12 Locking hole 20 Fixing hook 21 Holding part 22 Knob part 25 Reinforcement plate 26 Spot welding 30 Fixed hook 31 Holding part 35 Reinforcing plate 36 housing 37 housing cover 101 housing 102 housing cover 103 fixing hook 104 nipping portions d1, d2 predetermined gap

Claims (5)

  An air cleaner housing having clamping portions (21, 31) for clamping the housing cover to the housing by axially clamping the housing (1, 36) and the housing cover (10, 37) of the engine air cleaner by elastic force. A fixing hook structure for an air cleaner housing cover, wherein a reinforcing plate (25, 35) that covers the outside of the clamping portion in the axial direction is attached to the fixing hook (20, 30).   The clamping part can be attached to the housing (1) and the housing cover (10) at a minimum between the reinforcing plate (25) and the clamping part (21), and the hermeticity of the housing cover is at a maximum. The fixed hook structure for an air cleaner housing cover according to claim 1, wherein a separable axial clearance is provided.   The fixed hook structure for an air cleaner housing cover according to claim 2, wherein the reinforcing plate (25) is fixed to the fixed hook (20).   The fixed hook structure for an air cleaner housing cover according to claim 1, wherein the reinforcing plate (35) is formed in a shape that is in close contact with the clamping portion (31) in the axial direction.   The fixed hook structure for an air cleaner housing cover according to claim 4, wherein the reinforcing plate (35) is formed in a shape that is in close contact with the clamping portion (31) in the radial direction.

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