JP2009299606A - Engine tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an engine tool allowing easy attachment and detachment of an air cleaner, and stable fixing of the air cleaner with a simple structure. <P>SOLUTION: This engine tool includes a carburetor 21, the air cleaner 25 attached to the carburetor 21 via an attachment member 22, and a cover covering the air cleaner 25. The air cleaner 25 has a substantially L-shape attachment groove 23 formed on the attachment member 22, and is attached by slightly rotated after pushed in an axial direction. A rotation regulation part 16 regulating rotation of the air cleaner 25 when the cover is attached is provided at an inside of the cover to prevent the air cleaner 25 from falling off during operation of an engine. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an engine tool using a small engine such as a chain saw or a brush cutter, and more particularly to an engine tool that can be easily attached and detached and stably fixed.

  Conventionally, mowing mowers, engine chainsaws, engine hedge trimmers, engine blowers, and the like are known as portable engine tools. In these engine tools, portability and portability are important, and they are made as small and light as possible. As this type of engine, a two-cycle engine or a four-cycle engine is used, and air sucked from the outside is purified by an air cleaner and sent to a carburetor.

In general, since the engine generates vibrations during operation, a lot of vibrations are transmitted to the carburetor and the air cleaner. Therefore, the air cleaner attached to the carburetor is firmly fixed with screws, bolts, or the like so as not to be detached by vibration. For example, in Patent Document 1, a base having an outlet passage is attached to a carburetor, a cylindrical air cleaner is mounted on the base, and a lid member in which a bolt is incorporated is screwed into a screw hole of the base. By doing so, the air cleaner is fixed.
Japanese Utility Model Publication No. 3-78963

  When fixing the air cleaner using bolts as in Patent Document 1, it is fixed to the mounting member (base) so as to penetrate the axial center of the cylindrical air cleaner or through the filter element of the air cleaner. In this case, the effective area of the filter element is limited.

  The present invention has been made in view of the above background, and an object of the present invention is to provide an engine tool capable of attaching and detaching an air cleaner with one touch.

  Another object of the present invention is to provide an engine tool capable of stably fixing an air cleaner with a simple configuration.

  Still another object of the present invention is to provide an engine tool having an improved air cleaner fixing structure without increasing the number of parts.

  Of the inventions disclosed in the present application, typical features will be described as follows.

  According to one aspect of the present invention, there is provided an engine tool having a carburetor, an air cleaner attached to the carburetor via an attachment member, and a cover that covers the air cleaner, and the air cleaner is attached to the attachment member by being rotated. The cover is provided with a rotation restricting portion for restricting the rotation of the air cleaner when the cover is attached. With this structure, the air cleaner can be attached by pushing it into the attachment member and then rotating it slightly.

  According to another feature of the present invention, the mounting member has a cylindrical portion, a mounting groove is formed on the outer peripheral side of the cylindrical portion, and a cylindrical inner wall that is fitted into the cylindrical portion is formed on the air cleaner. A protrusion is formed on the inner wall. The mounting groove has a circumferential groove extending in the circumferential direction, and the axial movement of the air cleaner is restricted when the protrusion is fitted in the circumferential groove. The mounting groove is composed of an axial groove formed in the axial direction from the opening of the cylindrical portion, and a circumferential groove extending in the circumferential direction from the distal end side of the axial groove, and the shape when viewed from the outer peripheral side is It has a substantially L shape.

  According to still another feature of the present invention, the cover is formed with a pressing portion that presses in an axial direction in a partial region of the outer periphery of the air cleaner, and the pressing portion contacts the partial region of the air cleaner when the cover is attached to the engine tool. Touch. The pressing portion is formed at one location in the vicinity of the portion of the cover where the engine tool is attached to the housing, and the air cleaner is held between the pressing portion and the housing. The air cleaner is configured such that a filter is attached to the inner surface and the back surface in the axial direction, and the air cleaner can be divided between the front surface and the back surface.

  According to the first aspect of the present invention, the air cleaner is attached to the attachment member by being rotated, and the rotation restricting portion for restricting the rotation of the air cleaner when the cover is attached is provided on the cover. Since it can be mounted with a single touch only by rotating it to the extent that it can be prevented from being loosened and removed by the rotation restricting portion, the air cleaner can be stably fixed with a simple configuration.

  According to the second aspect of the present invention, since the air cleaner only needs to be pushed into the attachment member and rotated, the air cleaner can be attached with one hand with one touch.

  According to the invention of claim 3, the mounting member has a cylindrical portion, the mounting groove is formed on the outer peripheral side of the cylindrical portion, and the cylindrical inner wall that is fitted into the cylindrical portion is formed on the air cleaner. The inner wall is formed with a protrusion fitted into the mounting groove, the mounting groove has a circumferential groove extending in the circumferential direction, and when the protrusion is fitted into the circumferential groove, Since the movement of the air cleaner in the axial direction is limited, it is possible to provide an air cleaner mounting structure that can prevent the air cleaner from dropping off due to vibrations of the engine even if the mounting is easy.

  According to the invention of claim 4, the mounting groove is composed of an axial groove formed in the axial direction from the opening of the cylindrical portion, and a circumferential groove extending in the circumferential direction from the tip side of the axial groove, Since the shape when viewed from the outer peripheral side is substantially L-shaped, the shape is simple, and the mounting member can be easily manufactured by integral molding.

  According to the invention of claim 5, since the pressing portion that presses the air cleaner in the axial direction is formed in the cover in the partial region of the outer periphery of the air cleaner, and when the cover is attached to the engine tool, the pressing portion abuts on the air cleaner, Friction of the contact surface between the cylindrical portion of the mounting member and the cylindrical portion of the air cleaner can be reduced.

  According to the invention of claim 6, the pressing portion is formed at one location in the vicinity of the mounting portion of the cover to the housing of the engine tool, and the air cleaner is held by the pressing portion and the housing of the engine tool, so that vibration is generated. Since it is fixed at a difficult place, the air cleaner can be made difficult to vibrate.

  According to the invention of claim 7, since the filter is attached to the inner surface and the rear surface of the air cleaner, the area of the filter surface can be increased and the suction efficiency of the air cleaner can be improved.

  According to the invention of claim 8, since the air cleaner can be divided, it can be easily cleaned and replaced.

  The above and other objects and novel features of the present invention will become apparent from the following description and drawings.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following drawings, parts having the same function are denoted by the same reference numerals, and repeated description is omitted. FIG. 1 is a perspective view showing an appearance of a chain saw according to an embodiment of the present invention, FIG. 2 is a perspective view showing a state where a rear cover of the chain saw is removed, and FIG. 3 is a cross-sectional view of the chain saw.

  In FIG. 1, a chain saw 1 is equipped with a two-cycle engine, and a guide bar 11 protrudes in front of the main body. A saw chain (not shown) is wound around the periphery of the guide bar 11, and a tree, a branch, or the like can be cut by rotating the saw chain at a high speed. A two-cycle engine to be described later is housed in a housing in a horizontal position. A main handle 3 is provided above the chain saw 1, and a front handle 6 is provided so as to extend laterally and downward from the vicinity of the front end of the main handle 3.

  The main handle 3 is a handle for the operator to hold with the right hand, and the front handle 6 is a handle for the operator to hold with the left hand. A safety trigger 7a is provided near the upper portion of the main handle 3, and an ignition switch 7b is provided near the front end. A hand guard 12 is provided on the front side of the main handle. The hand guard 12 serves to protect a worker's hand from being hit by a branch or a cut object. The upper part of the housing is covered with a main body cover 4. A recoil starter (not shown) for starting the engine is accommodated inside the main body cover 4, and a starter handle 13 is attached through the main body cover 4.

  On the right side of the housing, the guide bar 11 is fixed by two bolts (not shown) and nuts 17a and 17b. Further, a drive force transmission mechanism to the saw chain is attached to the right side of the housing, and a light cover 5 is provided to cover it. A muffler guard 8 provided with a mesh-like air vent on the most part of the surface is attached behind the light cover 5 in order to guard against the heat of the engine muffler 66. A rear cover 9 is provided at the rear end of the chainsaw 1. The rear cover 9 is detachably fixed to the main body cover 4 with fixing screws 18. As shown in FIG. 2, when the rear cover 9 is removed by turning the fixing screw 18, the air cleaner 25 is exposed. On the right side of the fixing screw 18, a pull-out hook 20 is provided. The hook 20 is used, for example, when the chain saw 1 is pulled up to a high place with a rope when working on a tree. The hook 20 is attached to a mounting portion 20a formed integrally with the housing. The fixing plate 20b fixes the screw 20c.

  Next, the internal structure of the chainsaw 1 will be described using the cross-sectional view shown in FIG. Inside the housing 2 of the chainsaw 1, the engine 50 is accommodated almost horizontally. In this embodiment, the moving direction of the piston is not completely horizontal, but is in a “substantially horizontal” state in which the tip is slightly lowered. This is because when the engine 50 is completely placed horizontally, the height of the rear end portion of the chain saw 1 is increased due to the arrangement of the carburetor 21 and the air cleaner 25 arranged on the upper side thereof, so that the cylinder 55 is placed on the lower side. It is intended to tilt. The engine 50 performs an intake-compression-combustion-exhaust stroke while a piston 62 attached to the crank 64 via a connecting rod 63 reciprocates. The engine 50 is fixed to the housing 2 by bolts 33 from above and by bolts 34 from below. A fuel tank 14 for the engine 50 and a chain oil tank 15 for supplying oil to the saw chain are provided on the front side of the housing 2.

  The housing 2 is configured by integral molding of plastic, for example. Here, as can be understood from FIGS. 2 and 3, the engine 50 according to the present embodiment has an intake port (disposed on the upper side) connected to the carburetor 21 and an exhaust port (arranged on the right side) connected to the muffler 66 with reference to the center axis of the cylinder. Are arranged at intervals of about 90 degrees. The reason why the carburetor 21 is arranged above is to secure an air cleaner chamber for the air cleaner 25. A portion indicated by a thick frame in FIG. 3 is an air cleaner chamber, which is formed by the rear side of the main body cover 4 and the inner side of the rear cover 9. The intake port is connected to the carburetor 21 by an intake manifold 51, and the carburetor 21 and the air cleaner 25 are connected via a cleaner mounting base 22.

  FIG. 4 is a rear view of the main body cover 4 as viewed from the back in a state where the rear cover 9 and the air cleaner 25 of the chainsaw 1 are removed. In this drawing, the inner wall on the back side of the main body cover 4 and the carburetor 21 are visible. A cleaner mounting base 22 is attached to the carburetor 21, and the opening of the cleaner mounting base 22 has a shape that opens rearward. The main body cover 4 is manufactured by an integral structure such as plastic, for example, and a partition wall 4a is formed inside thereof, and a space surrounded by a hatched wall including the partition wall 4a forms an air cleaner chamber. In the air cleaner chamber, an air inlet 4d is formed in the lower part of the carburetor 21 of the main body cover 4 to take in outside air, and is provided at various positions of the main body cover by communicating with the gap between the housing 2 and the main body cover 4. Air is inhaled through the air gap. A presser rib 4b, which will be described later, is formed above the main body cover 4, and a rear cover fixing screw hole 4c that is screwed with a fixing screw 18 (FIG. 1) for attaching the rear cover 9 is formed below. A through hole 4e is formed on the left side of the rear cover fixing screw hole 4c in order to fix the main body cover 4 to the housing 2 with screws.

  FIG. 5 is a perspective view showing the cleaner mounting base 22 according to the embodiment of the present invention. The cleaner mounting base 22 includes a flange portion 22a for fixing to the carburetor, two screw holes 22d formed in the flange portion 22a for screwing, an inclined portion 22b extending from the flange portion 22a, and an inclined portion 22b. It is comprised by the connection part 22c formed in the front end side. In addition, attachment grooves 23 are formed at two locations in the circumferential direction in the connection portion 22c. The cleaner mounting base 22 can be manufactured in an integral configuration with a resin such as plastic or a metal such as aluminum.

  FIG. 6 is a view showing a mounting position relationship between the cleaner mounting base 22 and the air cleaner 25 mounted thereon. The mounting groove 23 includes an axial groove 23a formed in the axial direction from the opening of the cylindrical connection portion 22c, and a circumferential groove extending in a circumferential direction from an end portion of the axial groove 23a on the carburetor 21 side. 23b. As can be understood from FIG. 6, the shape of the mounting groove 23 is a groove having a substantially L shape when viewed from the outer peripheral side of the connecting portion 23 b.

  The air cleaner 25 is configured by fitting the back side housing 26 and the front side housing 27, and the filters 28 and 29 can be cleaned by separating them. In the present specification, the upstream side is referred to as the front surface and the downstream side is referred to as the back surface when viewed in the direction of air flow from the atmosphere side to the carburetor 21. A cylindrical portion 30 is formed in the vicinity of the center portion of the back housing 26 so as to be fitted into the cylindrical connection portion 22c of the cleaner mounting base 22. Two cylindrical portions 30 are spaced apart from each other by 180 degrees in the circumferential direction. The protrusion 30a is formed on the surface. The protrusion 30a is guided by the axial groove 23a of the mounting groove 23 when the air cleaner 25 is pushed in the direction of the arrow, and the circumferential groove is rotated by rotating the air cleaner 25 when it contacts the tip of the axial groove 23a. 23b is guided and the protrusion 30a contacts the end of the circumferential groove 23b. At this position, even if the air cleaner 25 is moved in the direction opposite to the arrow, the mounting groove 23 restricts the movement in the axial direction, so that the air cleaner 25 is not attached or detached.

  FIG. 7 is a perspective view of the air cleaner 25 as viewed from the front side. The front housing 27 and the back housing 26 of the air cleaner 25 are made of, for example, plastic. The front housing 27 is formed with a filter 29 that is divided into nine sections by a crosspiece 27a. The filter 29 allows air from the outside to pass while being filtered, and prevents dust from entering the engine 50. Ribs 26c and 27c protrude from the lower portions of the front housing 27 and the back housing 26, and the operator can separate the front housing 27 and the back housing 26 by moving these ribs in the separating direction. A protruding rib 26 b is formed on the upper portion of the back side housing 26. This role will be described later. In the present embodiment, the lower portion on the right side of the air cleaner 25 has a cut-off portion 25a cut off obliquely.

  FIG. 8 is a perspective view of the air cleaner 25 as seen from the back side. The rear housing 26 is formed with a cylindrical portion 30 that is inserted into the cleaner mounting base 22, and a filter 28 that is divided into six sections by a crosspiece 26 a is formed around the cylindrical portion 30. Projecting portions 30 a are formed at two locations on the inner wall of the cylindrical portion 30. The filter 28 prevents dust from entering from outside during intake. The filter element attached to the back housing 26 has a shape with a cylindrical hole in the center, and the diameter of the hole corresponds to the outer diameter of the cylindrical portion 30. As described above, the air cleaner 25 has a flat shape extending in the axial direction and the vertical direction, and the filter elements are arranged on the front side and the back side, respectively, so that a sufficient capacity can be secured, and the air cleaner 25 is front and rear with respect to the air inflow direction of the carburetor 21. Since the length is short, even if it is arranged inside the cover of the engine tool, a small space can be used effectively.

  FIG. 9 is a rear view showing a state when the air cleaner 25 is mounted. The air cleaner is positioned slightly tilted to the left, and is pushed toward the carburetor 21 so that the protruding portion 30 a shown in FIG. 6 engages with the axial groove 23 a of the mounting groove 23. A portion of the air cleaner 25 is formed with a notch 25a having an obliquely cut shape. When the pusher is pushed in as can be understood from FIG. 9, the notch 25a is positioned substantially parallel to the partition wall 4a of the main body cover 4. Become a relationship. By forming this notch 25a, not only the positioning when the operator inserts the air cleaner 25 is facilitated, but also the air cleaner 25 can be prevented from coming into contact with the partition wall 4a during mounting.

  When the air cleaner 25 is pushed in and the guide portion 30a comes into contact with the tip of the axial groove 23a, the air cleaner 25 is rotated in the direction of the arrow 35 in FIG. FIG. 10 shows the state after the rotation. At this time, when the air cleaner 25 is rotated in the direction of the arrow, the protruding rib 26 a provided on the upper portion is positioned so as to overlap the rear of the pressing rib 4 b formed on the main body cover 4. Thus, by confirming that the protruding rib 26a is positioned on the holding rib 4b, the operator can confirm at a glance that the air cleaner 25 has been correctly mounted.

  FIG. 11 is a view showing the back side (inside) of the rear cover 9 according to the embodiment of the present invention. The rear cover 9 is manufactured by integral molding using, for example, plastic, and a slit 9 a for projecting the hook 20 to the outside and a screw hole 9 b for a fixing screw 18 for fixing the rear cover 9 to the main body cover 4 are formed. . Further, a partition wall 9c is formed inside the rear cover 9 so as to abut against the partition wall 4a formed on the main body cover 4 so as to define an air cleaner chamber. On the upper portion of the rear cover 9, a hook portion 10 that is hooked on the slit of the main body cover 4 and a rotation restricting portion 16 that restricts the rotation of the air cleaner 25 are formed.

  FIG. 12 is an enlarged perspective view showing the shapes of the hook portion 10 and the rotation restricting portion 16 of FIG. The hook portion 10 and the rotation restricting portion 16 are manufactured by integral molding with the rear cover 9. The hook portion 10 holds the protruding rib 26 a together with the claw portion 10 a protruding upward so as to be fitted into the slit portion 4 f (FIG. 13) of the main body cover 4 and the pressing rib 4 b formed on the main body cover 4. The pressing portion 10b is formed. The rotation restricting portion 16 has a shape protruding downward from the upper edge portion of the rear cover 9, and restricts the movement of the protruding rib 26 a in the rotating direction when the rear cover 9 is fixed to the main body cover 4.

  13 is a cross-sectional view taken along the line AA in FIG. 11 and shows a state when the rear cover 9 is attached. As can be understood from this cross-sectional view, a filter 28 that allows air to be filtered is attached to the back housing 26. In this figure, the claw portion 10 a of the hook portion 10 is fitted into the slit portion 4 f of the main body cover 4. At this time, the pressing portion 10 b formed on the lower side of the claw portion 10 a presses the protruding rib 26 b in the direction of the pressing rib 4 b formed on the main body cover 4. Thus, since the air cleaner 25 is clamped with the main body cover 4 by the pressing part 10b when the rear cover 9 is attached, it is possible to effectively reduce the resonance of the air cleaner 25 due to vibration during engine operation. Further, this fixed position of the main body cover is also a place where vibrations of the engine are not easily transmitted, so that it is possible to reduce the wear of the joint due to the vibrations.

  FIG. 14 is a cross-sectional view taken along the line BB in FIG. 11 and shows a state when the rear cover 9 is attached. As can be understood from this cross-sectional view, the front housing 27 is provided with a filter 29 that enables air filtration to be sucked. The rotation restricting portion 16 projects to the front side (carburetor 21 side) from the projecting rib 26b when viewed from the side. Therefore, when the rear cover 9 is mounted, the air cleaner 25 can be prevented from rotating in the direction opposite to the mounting direction (the direction of the arrow 35 in FIG. 9), so that the air cleaner 25 is detached from the cleaner mounting base 22. Can be prevented.

  According to the present embodiment, it is possible to provide an engine tool that can attach and detach the air cleaner 25 with a single touch and can stably fix the air cleaner 25 with a simple configuration. Moreover, the fixing structure of the air cleaner 25 can be realized without increasing the number of parts. Furthermore, since bolts are not used for mounting the air cleaner 25, the area of the filter element of the air cleaner is not reduced due to the arrangement of the bolts.

  In the embodiment described above, the example of the engine tool applied to the chainsaw 1 using the two-cycle engine has been described. However, the device to which the present invention is applied may be any device, and other engine tools or engines are used. It is equally applicable to equipment as well. The present invention can be similarly applied not only to a 2-cycle engine but also to a 4-cycle engine. Further, the present invention can be applied not only to the attachment of the air cleaner to the carburetor but also to the attachment structure of the air cleaner in the engine using the fuel injection device.

  As mentioned above, although demonstrated based on embodiment which shows this invention, this invention is not limited to the above-mentioned form, A various change is possible within the range which does not deviate from the meaning. For example, in the present embodiment, the mounting groove 23 is formed in the connecting portion 22c of the cleaner mounting base 22 and the protruding portion 30a is provided in the cylindrical portion 30 of the air cleaner 25. However, this positional relationship may be reversed.

It is a perspective view which shows the external appearance of the chainsaw which concerns on embodiment of this invention. It is a perspective view which shows the state which removed the rear cover 9 and the muffler guard 8 of the chainsaw which concerns on embodiment of this invention. It is sectional drawing of the chainsaw which concerns on embodiment of this invention. FIG. 6 is a rear view of the main body cover 4 as viewed from the back in a state where the rear cover 9 and the air cleaner 25 are removed. It is a perspective view which shows the cleaner mounting base 22 which concerns on embodiment of this invention. It is a side view which shows the attachment or detachment relationship of the carburetor 21 and the air cleaner 25 which concern on embodiment of this invention. It is the perspective view seen from the front side of the air cleaner 25 which concerns on embodiment of this invention. It is the perspective view seen from the back side of the air cleaner 25 which concerns on embodiment of this invention. It is a rear view which shows the state at the time of mounting | wearing of the air cleaner 25 which concerns on embodiment of this invention. It is a rear view which shows the state after mounting | wearing of the air cleaner 25 which concerns on embodiment of this invention. It is a figure which shows the back side (inner side) of the rear cover 9 which concerns on embodiment of this invention. It is an expansion perspective view which shows the shape of the hook part 10 and the rotation control part 16 of FIG. It is sectional drawing of the AA part of FIG. 11 at the time of attachment. It is sectional drawing of the BB part of FIG. 11 at the time of attachment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Chain saw 2 Housing 3 Main handle 3a (Main handle's) attachment part 4 Main body cover 4a Partition wall 4b Holding rib 4c Rear cover fixing screw hole 4d Air intake 4e Through hole 4f Slit part 5 Light cover 6 Front handle 7a Safety trigger 7b Ignition Switch 8 Muffler guard 9 Rear cover 9a (rear cover) slit 9b (rear cover) screw hole 9c (rear cover) partition wall 10 (rear cover) mounting hinge 10a claw portion 10b pressing portion 11 guide bar 12 hand guard 13 starter handle 14 fuel tank 15 Chain oil tank 16 (rear cover) rotation restricting portion 17a, 17b Nut 18 Fixing screw 19a, 19b Bolt 20 Hook 20a Mounting portion 20b Mounting plate 20c Screw 21 Yabureta 22 cleaner mount
22a Flange portion 22b Inclined portion 22c Connection portion 22d Screw hole 23 Mounting groove 25 Air cleaner 25a Notch 26 Back side housing 26a Beam 26b Protruding rib 26c Split rib 27 Front side housing 27a Beam 27b Cutout portion 27c Split rib 28 Filter 29 Filter 30 Cylindrical part 30a Protruding part 33, 34 (for engine fixing) bolt 50 Engine 51 Intake manifold 55 Cylinder 56 Inlet 57 Exhaust 59 Ignition coil unit 60 Plug cap 61 Spark plug 62 Piston 63 Connecting rod 64 Crank 66 Muffler

Claims (8)

An engine tool having a carburetor, an air cleaner attached to the carburetor via an attachment member, and a cover covering the air cleaner,
The air cleaner is attached by rotating the attachment member,
An engine tool characterized in that a rotation restricting portion for restricting rotation of the air cleaner when the cover is attached is provided on the cover.   The engine tool according to claim 1, wherein the air cleaner is attached by being pushed into the attachment member and then rotated. The mounting member has a cylindrical portion, and a mounting groove is formed on the outer peripheral side of the cylindrical portion,
The air cleaner is formed with a cylindrical inner wall that is inserted into the cylindrical part, and a protrusion that is fitted into the mounting groove is formed on the inner wall.
The mounting groove has a circumferential groove extending in a circumferential direction, and the axial movement of the air cleaner is restricted when the protruding portion is fitted in the circumferential groove. Item 1. The engine tool according to Item 1.   The mounting groove is composed of an axial groove formed in the axial direction from the opening of the cylindrical portion, and a circumferential groove extending in the circumferential direction from the distal end side of the axial groove, when viewed from the outer peripheral side. The engine tool according to claim 3, wherein the shape of the engine tool is substantially L-shaped. The cover is formed with a pressing portion that presses in the axial direction in a partial region of the outer periphery of the air cleaner,
The engine tool according to any one of claims 1 to 4, wherein the pressing portion contacts the air cleaner when the cover is attached to the engine tool.   The press part is formed at one location in the vicinity of an attachment part of the cover to the housing of the engine tool, and the air cleaner is clamped by the press part and the housing of the engine tool. The listed engine tool.   The engine tool according to claim 6, wherein the air cleaner has a filter attached to an inner surface and a rear surface in the axial direction.   The engine tool according to claim 7, wherein the air cleaner is separable.

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