JP2020092909A - Cleaner - Google Patents

Abstract

To provide a portable cleaner that achieves further reduction of vibration and noise.SOLUTION: In a cleaner having a housing 2, a motor 40 housed in the housing 2 and having an output shaft, a motor holder 50 for holding the motor 40, and a fan 65 for generating a suction force, the motor holder 50 and the housing 2 are held using a first elastic part (rubber bush 70) and a second elastic part (rubber cap 80). Further, the rubber bush 70 has a spring characteristic that makes it easier for the motor holder 50 to be displaced in the circumferential direction than in the axial direction, thereby reducing noise and vibration during a suction operation.SELECTED DRAWING: Figure 9

Description

The present invention relates to a portable cleaner, and particularly to an improved motor support structure for a housing.

A conventional portable cleaner includes a motor inside a housing and a dust collecting fan that rotates by the motor, and a dust case that collects dust and the like sucked by the rotation of the dust collecting fan is arranged in front of the housing. The dust case is provided with a suction port for sucking dust and the like, and inside is provided with a filter device for trapping only dust from the sucked dust-containing air. A handle part for an operator to hold with one hand is formed in a part of a housing that houses the motor, and a switch for starting and stopping the motor is arranged in the handle part. The housing further has a battery mounting portion for mounting the battery pack. As such a portable cleaner, for example, the technique of Patent Document 1 is known.

In the above cleaner, when the motor is started by turning on the switch, the dust collecting fan rotates and a suction force is generated at the suction port. When the worker starts the dust collecting work, the dust-containing air sucked from the suction port is separated only by the filter material of the filter device and stays in the dust case. The air that has passed through the filter device is sucked from the dust case into the motor housing that houses the dust collecting fan, flows around the motor, and is discharged to the outside from the exhaust port formed in the motor housing.

International publication WO2016/052267

In the cleaner disclosed in Patent Document 1, an elastic body is interposed between the motor and the housing to support the motor to reduce vibration and noise. Usually, in order to reduce vibration and noise, an elastic body is made of a soft material to reduce the spring constant. However, if the spring constant is reduced too much, the motor is likely to move relative to the housing during rotation, so that the output shaft of the motor may shake and further vibration and noise may occur.

The present invention has been made in view of the above background, and an object thereof is to provide a portable cleaner that achieves further reduction of vibration and noise.
Another object of the present invention is to provide a cleaner that elastically supports a motor with respect to a housing by using a motor holder for holding the motor.
Still another object of the present invention is to provide a cleaner in which the shape of an elastic member interposed between the housing and the motor holder is improved so that vibration in a specific direction can be absorbed particularly efficiently.

Typical features of the invention disclosed in the present application will be described below.
According to one aspect of the present invention, a housing, a drive unit having an output shaft and housed in the housing, a fan fixed to the output shaft for generating a suction force, and a housing between the housing and the drive unit. A cleaner having a first elastic portion for supporting the driving portion, the first elastic portion being interposed between the housing and the driving portion in the axial direction and the circumferential direction of the output shaft, and The portion is formed to be easily displaced in the circumferential direction rather than the axial direction. The first elastic portion is provided on at least one of the housing and the driving portion, and has an insertion hole into which the convex portion formed on the driving portion is inserted, and the convex portion is arranged in the circumferential direction rather than the axial direction. The first elastic portion is formed so as to be easily displaced. That is, the spring constant of the first elastic portion in the circumferential direction is formed to be lower than the spring constant in the axial direction. Further, the first elastic portion forms an elastic region by providing a hollow portion adjacent to the insertion hole in the circumferential direction and providing a cavity in the circumferential direction of the elastic body. Further, the hollow portion is formed with an inhibition portion such as a rib for inhibiting the entry of the convex portion, thereby preventing occurrence of erroneous assembly (assembly error) during assembly. The convex portion is provided on one side of the housing or the driving portion, and the fitting hole for fitting the first elastic portion is provided on the other side of the housing or the driving portion.

According to another feature of the invention, the convex portion is provided on one side of the housing or the driving portion, and the fitting hole into which the first elastic portion is fitted is provided on the other side of the housing or the driving portion. The convex portion has a plate shape that is long in the axial direction and thin in the circumferential direction. Further, the size of the first elastic portion in the circumferential direction is larger than the size in the axial direction. The drive unit includes a motor having an output shaft and a motor holder that supports the motor and is supported by the first elastic portion. The outer diameter of the motor is smaller than the outer diameter of the fan. Is formed larger than the outer diameter of the fan.

According to still another feature of the present invention, a plurality of ribs are formed on the outer peripheral portion of the motor holder, and the ribs are formed so as to be separated from each other in the circumferential direction and to extend radially outward from the motor. The first elastic portion is provided on the housing side so as to abut on the radially outer end portions of the plurality of ribs. Four ribs are provided so as to extend at equal intervals in the radial direction from a cylindrical portion that houses the outer peripheral surface of the motor. Further, the housing has an intake port provided on the front side of the fan and an exhaust port provided on the rear side of the drive unit when viewed in the axial direction. Further, a dust case having a suction port for sucking dust is provided in front of the intake port of the housing, and a connection part to which the battery pack is connected is provided on the rear side of the housing and near the exhaust port.

According to the present invention, the spring constant in the circumferential direction of the first elastic body that holds the motor is formed to be lower than the spring constant in the axial direction, so that the vibration isolation effect can be enhanced with a compact configuration. In particular, since the vibration generated from the motor is larger in the circumferential direction than in the radial direction, the effect of lowering the spring constant of the elastic body in the circumferential direction is great. In addition, since the elastic region is formed by providing the cavity in the circumferential direction of the elastic body, and the misassembly preventing rib is formed in the elastic region, the rib and the first elastic body are erroneously incorporated during manufacturing and assembling. Assembly) can be reliably prevented and the assemblability can be improved.

It is a right side view of the cleaner 1 which concerns on the Example of this invention. It is a longitudinal cross-sectional view of the cleaner 1 which concerns on the Example of this invention. It is a figure for demonstrating each part of the housing 2 of FIG. It is an AA sectional view of FIG. It is a BB sectional view of FIG. It is a figure of the motor holder 50 simple substance of FIG. 2, (A) is a perspective view, (B) is a side view. 1. It is CC sectional drawing of FIG. FIG. 7 is a partial perspective view for explaining how to attach the motor holder 50 to the rubber bush 70. FIG. 6 is a cross-sectional perspective view showing how the motor holder 50 is attached to the housing 2. It is a perspective view of a rubber bush 70. It is a figure which shows the rubber bush 70 simple substance shown in FIG. 10, (A) is a top view, (B) is DD sectional drawing, (C) is EE sectional part. It is a figure which shows the rubber bush 170 which concerns on the modification of the Example of this invention. FIG. 7 is a diagram showing a first elastic part 270 according to a second embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the drawings. In the following drawings, the same parts are designated by the same reference numerals, and repeated description will be omitted. Further, in this specification, the front-rear, left-right, and up-down directions are described as the directions shown in the drawings.

FIG. 1 is a right side view of a portable cleaner 1 according to an embodiment of the present invention. The cleaner 1 is a device that allows an operator to perform dust collecting work while holding it with one hand, and the appearance is defined by the main housing 2 and the dust case 90. The housing 2 houses therein a motor and a fan, which will be described later, and is formed with a handle portion 4 which an operator holds with one hand. Further, the battery pack 100 is mounted below the handle portion 4. A cylindrical dust case 90 is attached to the front side of the housing 2. The dust case 90 is configured to be attachable to and detachable from the housing 2, a nozzle 92 serving as a suction port is formed on the front side, and a filter device (not shown) is provided inside the nozzle 92. Although not shown here, it is possible to connect a pipe to the nozzle 92 and a floor nozzle or the like at the tip of the pipe.

The housing 2 is a synthetic resin molded product, and is formed in a two-part type having a parting surface in the vertical direction. The left and right parts of the housing 2 have a plurality of screw holes 12a to 12e and screw bosses (not shown) and are fixed by fixing elements such as screws (not shown). The dust case 90 is manufactured by integral molding of synthetic resin and does not have a dividing surface in the vertical direction. The dust case 90 can be mounted by aligning it with the housing 2 and pressing it backward in the direction of the axis B1 and then rotating it about 120 degrees around the axis B1. When removing the dust case 90, the operation opposite to the attaching operation may be performed. The structure for fixing the dust case 90 to the housing 2 is optional in the present invention, and other known fixing methods may be used. The axis B1 is the center of rotation when the dust case 90 is attached and detached, but in the present embodiment, the axis B1 which is the rotation center when the dust case 90 is attached and detached is coaxial with the axis A1 of the motor drive shaft. It is said that.

On the rear side of the housing 2, there is formed a penetrating portion 7 for inserting four fingers of an operator, from the index finger to the little finger, and has a substantially D-shape that is rotated 90 degrees in a side view. One side, which separates the D-shaped cavity (penetration part 7), becomes the handle part 4 that is gripped by the operator, and the other side becomes the connection part 5. The handle portion 4 has a grip portion extending along the direction of the axis A1 and a bent portion that extends so as to intersect the axis A1 and connects the grip portion and the rear end of the connecting portion 5, and the bent portion has the axis A1. The position viewed in the direction is arranged so as to overlap the main exhaust port 30. On the upper surface of the handle section 4, an operation panel section 20 having a switch for switching the motor on or off is provided.

On the side surface of the housing 2, a main exhaust port 30 and an auxiliary exhaust port 31 are provided for exhausting air filtered by a filter device (described later) out of dust-containing air sucked through the nozzle 92. The main exhaust port 30 is a plurality of slits whose longitudinal direction is obliquely arranged with respect to the axis B1 (or an axis A1 described later in FIG. 2). Nine main exhaust ports 30 are formed so that slits having a narrow width extend in the parallel direction in order to prevent foreign matter from being inserted therein. Similarly to the main exhaust port 30, the auxiliary exhaust port 31 is also formed by a plurality of slits whose longitudinal direction is oblique to the axis B1.

A battery mounting portion 6 is provided on the lower surface of the connection portion 5 of the housing 2, and the battery pack 100 is detachably attached to the battery mounting portion 6. The battery pack 100 contains a plurality of battery cells inside a case and supplies electric power to the motor 40. The battery pack 100 can be mounted by sliding it forward of the housing 2 in the axis A1 direction, and can be removed by pushing the latch button 101 and sliding it backward in the axis A1 direction.

FIG. 2 is a vertical sectional view of the cleaner 1 according to the embodiment of the present invention. The motor 40 is housed in the housing 2, and the output shaft (not shown) of the motor 40 is arranged so as to be along the axis A1. Here, the axis A1 is coaxial with the rotation axis B1 for mounting the dust case 90. An output shaft (not shown) of the motor 40 protrudes from the motor 40 toward the front side (the side opposite to the battery mounting portion 6), and a fan 65 is provided at the tip thereof. The connection part 5 is formed below the penetrating part 7 of the housing 2, and the battery pack 100 is mounted below the connection part 5. The connecting portion 5 is hollow so as to form an internal space continuous with the motor housing portion 3, and a main exhaust port 30 is formed near the rear end. The vicinity of the rear end of the connecting portion 5 is connected to the vicinity of the lower side of the rear end 4b of the handle portion 4. Auxiliary exhaust ports 31 are formed below the left and right sides of the motor 40 of the housing 2. A battery mounting portion 6 is formed below the connection portion 5, and the battery pack 100 is mounted therein.

The motor 40 is a DC motor having a rotor housed in a metal motor case, and is a so-called "casing motor". Although illustration of the internal structure of the motor 40 is omitted here, the entire motor 40 is covered with a magnetic material having a substantially cylindrical shape, for example, an iron material having a thickness of 2 to 3 mm, and the case covers a part of the stator. Also serve. An arc-shaped permanent magnet (not shown) is fixed to the inner peripheral side wall surface of the case, and a magnetic metal stator yoke (described later in FIG. 7) formed by bending a thick plate into an arc shape on the outer peripheral surface of the case. Is provided. A rotor fixed to an output shaft (not shown) is built in the motor 40.

An outer peripheral portion near the front end of the motor 40 is held by a motor holder 50 having a cylindrical holding surface (an inner cylinder portion 51 described later in FIG. 6). The motor holder 50 is provided with protrusions 54 for connecting to the housing 2 on the upper and lower sides. The protruding portion 54 is held by the inserted hole 19a formed on the housing 2 side through the rubber bush 70. The inserted holes 19a are formed at two locations on the upper side and the lower side of the housing 2, and are formed by three ribs 17a to 17c formed so as to be adjacent in parallel. Although not visible in the cross-sectional view of FIG. 2, horizontally extending portions are formed on the right and left sides of the motor holder 50, and similar protrusions 54 are formed on both left and right ends (described later in FIGS. 5 and 6). The left and right protrusions 54 are held by the inserted holes 19b (details will be described later with reference to FIG. 5) formed on the housing 2 side via the rubber bush 70. The drive unit of the present embodiment includes a motor 40 having an output shaft and a motor holder 50 that supports the motor 40 and is supported by the housing 2 by the first elastic member.

Near the rear end of the motor 40, a rear bearing holding portion 46, which has a cylindrical shape protruding from the rear end surface of the case, is held by the motor rear end holding portion 15 formed in the housing 2. At this time, since the rubber cap 80, which is the second elastic body, is attached to the rear bearing holding portion 46, the motor 40 is elastically supported by the motor rear end holding portion 15 via the rubber cap 80. The motor rear end holding portion 15 is formed over both the right side portion and the left side portion of the housing 2 and has a positional relationship such that the rear side bearing holding portion 46 of the motor 40 is sandwiched. The rubber cap 80 is manufactured by integral molding of synthetic rubber, and the inner diameter thereof is configured to be mountable on the outer peripheral surface of the rear bearing holding portion 46.

The fan 65 is fixed to the output shaft (not shown) of the motor 40 and rotates about the axis A1 in synchronization with the rotation of the motor 40. The fan 65 is a centrifugal fan, sucks wind from the front side along the axis A1 and discharges the air to the outside in the radial direction of the fan 65. The air sucked from the nozzle 92 into the dust case 90 passes from the outside to the inside of the filter device 95, as shown by an arrow C1, so that foreign matters such as dust and dirt are captured. The air that has reached the inside of the filter device 95 flows into the internal space of the housing 2 from the intake port 10, reaches the fan chamber 11 a that is the accommodation space for the fan 65, and is sucked into the fan 65. In the fan chamber 11a, air is discharged to the outside in the radial direction from the vicinity of the axis A1 by the fan 65, passes through the outer peripheral side of the outer cylindrical portion 55 (see FIG. 6) of the motor holder 50, and flows to the rear side, The motor storage chamber 11b is reached. In FIG. 2, as the flow of the cooling air, an air flow C1 mainly flowing below the motor 40 and an air flow C2 mainly flowing above the motor 40 are shown by arrows, but the flows are clearly separated. However, the flow shown by the arrow is an example.

In the conventional cleaner, the flow of the cooling air is discharged to the outside from the exhaust ports (the large exhaust ports formed at the positions of the auxiliary exhaust ports 31 in FIG. 2) arranged on both the left and right sides in the motor housing chamber 11b. .. Further, since a mechanical trigger switch mechanism is arranged in the internal space 11d of the handle portion 4, it is in a state that it cannot be practically used as an air passage. Further, in the vicinity of the connection chamber 11c, which is an internal space of the connection portion 5, a main body side terminal 9 for fitting with the connection terminal 112 of the battery pack 100 is arranged, and further wiring not shown and a control circuit for the motor 40 are provided. Since the substrate was placed, it was in an unsuitable state for use as an air passage. However, in this embodiment, the main exhaust port 30 is arranged on the rear side, and not only the connection chamber 11c but also the internal space 11d of the handle portion 4 is used as an air passage.

In the cleaner 1, when the “strong mode” button 21 or the “weak mode” button 22 of the operation panel unit 20 is pressed, the electric power of the battery pack 100 is supplied to the motor 40, and the motor 40 rotates. When the “OFF” button 23 is pressed while the motor 40 is rotating, the electric power of the battery pack 100 is not supplied to the motor 40 and the motor 40 stops. A notification lamp 24 is provided adjacent to these three buttons 21 to 23. The notification lamp 24 is turned on while the motor 40 is rotating, and is turned off when the "off" switch is pressed to stop the motor 40.

When the motor 40 rotates, the fan 65 rotates, so that the air inside the dust case 90 is sucked out to become a negative pressure, and the suction force is generated in the intake passage 92a. Therefore, the air and foreign matter outside the housing 2 are sucked into the dust case 90 from the suction nozzle 92. In this embodiment, the fan 65 rotates to cause the airflows C1 and C2 to flow. The arrangement of the air passages of this embodiment has the following features.
(1) The main air flow C1 is discharged to the outside through the main exhaust port 30 provided near the rear end of the housing 2. Therefore, the control circuit board 25, which is conventionally housed in the connection chamber 11c that serves as the air passage for the air flow C1, is moved to directly below the operation panel unit 20. Further, the size of the terminal holder 8 in the connection chamber 11c is reduced to make the air flow in the connection chamber 11c smooth.
(2) As the air passage extending from the motor housing chamber 11b to the main exhaust port 30, the space inside the handle portion 4 (handle portion space 11d) is used to flow like C2. In order to effectively use the handle portion space 11d as an air passage, a soft touch type switch (21 to 23) is used as an on or off switch of the motor 40 without using a mechanical switch having a trigger type lever. As a result, the thickness of the operation panel unit 20 is reduced. Further, the control circuit board 25 is housed in the operation panel unit 20, so that the size of the operation panel unit 20 is made compact. As can be seen in FIG. 2, a sufficient space can be secured as the air passage under the operation panel section 20.
(3) Due to the increase in the intake air accompanying the improvement in the output of the motor 40, the exhaust resistance may increase only by using the main exhaust port 30 from the air flows C1 and C2. Therefore, the shortage is exhausted to the outside like the air flow C3 by using the auxiliary exhaust port 31 provided near the motor 40.
(4) The air streams C1 and C2 join together at the rear end of the handle portion 4, but the main exhaust port 30 is arranged near the joining point, so that the air is efficiently exhausted.
(5) Since the airflow C2 flows through the handle portion 4, the effect of cooling the operation panel portion 20 and the control circuit board 25 is enhanced.

As described above, in the present embodiment, not only the flow passing through the shortest passage (inside the connecting portion 5) connecting the main exhaust port 30 from the rear of the motor 40 like the air flow C1, but also the internal space of the handle portion 4 Since the air is also used as the air passage of the sucked air C2, the air passage of the cooling air can be sufficiently secured even in the cleaner 1 of the type in which the battery pack 100 is attached to the lower side of the connection portion 5. Eliminates the need to expand Moreover, since the outlet of the exhaust gas is located substantially at the rear end of the housing 2, it is possible to significantly reduce the noise caused by the rotation of the fan 65.

Inside the opening 2a on the front side of the housing 2, a cylindrical portion 16 that forms a mounting mechanism for mounting the dust case 90 is formed. The cylindrical portion 16 is formed on the housing 2 side, and has a groove portion 16a extending in the axial direction and the circumferential direction and having an L-shape when viewed from the outside in the radial direction. On the other hand, a projection 93 is formed inside the opening 91 of the dust case 90, and the projection 93 is axially moved inside the groove 16a and then rotated about 120 degrees in the circumferential direction at the fitting position. Retained. Further, the dust case 90 can be rotated with respect to the housing 2 about the axis B1 to extract the convex portion 93 from the groove portion 16a. The dust case 90 can be removed from the housing 2 by pulling out the protrusion 93 from the groove 16 a.

A filter device 95 is provided inside the cylindrical portion 16. The filter device 95 includes a pre-filter and a filter material (not shown), is cup-shaped so as to have air permeability, and is configured such that the opening of the cup faces the opening 2 a side of the housing 2. .. The shape of the dust case 90 including the filter device 95 is arbitrary and is not limited to the shape described in this embodiment. Alternatively, a cyclone dust collecting method may be used.

The dust case 90 is a member formed by integrally molding a synthetic resin into a tubular shape. The dust case 90 has a cylindrical shape along the axis B1 of the rotation center for attachment to the housing 2, has a suction nozzle 92 on the front side, and has an opening 91 connected to the opening 2a of the housing 2 on the rear side. It is formed. The dust case 90 is attached to the housing 2 so as to cover the outside of the cylindrical portion 16 of the housing 2. The suction nozzle 92 of the dust case 90 is provided on the opposite side of the opening 91 in the direction along the axis B1. The axis B1 of the dust case 90 and the axis A1 of the motor 40 are configured to match here, but the axes A1 and B1 do not necessarily have to match, and the axes A1 and B1 may be offset or slanted. You may arrange so that it may face to. The suction nozzle 92 is a cylindrical body arranged concentrically with the axis B1, and the suction nozzle 92 forms an intake passage 92a. The intake passage 92a is a pipe that connects the inside and the outside of the dust case 90, and also serves as a connecting portion for connecting an extension pipe (not shown).

FIG. 3 is a diagram for explaining each part of the housing 2. The inside of the housing 2 can be defined as three main spaces partitioned by a range indicated by a thick line. One is the motor housing 3 that houses the motor 40 and the fan 65. In order to arrange the motor 40 having a small diameter in the vicinity of the axis of the cylindrical housing 2, the front side of the motor 40 is held by the motor holder 50, and the rear side is formed on the inner wall portion of the housing 2. It is held by the motor rear end holding portion 15 that has been cut. That is, the motor holder 50 is also a mounting member for holding the motor 40, which is sufficiently smaller than the inner diameter of the housing 2, at a position corresponding to the axes A1 and B1. A part of the motor 40 is arranged in the motor holder 50 in the direction along the axis A1. A screw hole (not shown) is formed on the front side wall surface of the motor 40, and a plurality of screws (not shown) are used by using the screw holes formed in the bottom surface portion 52 (see FIG. 6 of the motor holder 50) of the motor 40. Are fixed to the motor holder 50. There is a large space (motor housing chamber 11b) between the outer peripheral surface of the motor 40 and the inner wall surface of the housing 2, and the motor holder 50 is configured so as not to obstruct the air passage.

The handle portion 4 is a cylindrical space having a hollow interior, and the front end portion 4 a is connected to the motor housing portion 3 to form an internal space (handle portion space 11 d) continuous from the motor housing portion 3. .. The rear end portion 4b of the handle portion 4 is connected to the connecting portion 5. The internal space of the handle portion 4 (handle portion space 11d) and the internal space of the connection portion 5 (connection chamber 11c) are spatially connected. As viewed in the axial direction of the housing 2, the intake port 10 is provided on the front side of the fan 65, and the main exhaust port 30 is provided on the rear side of the motor 40. The connecting portion 5 is formed to connect the battery pack 100, but in the present embodiment, the main exhaust port 30 is formed near the rear of the connecting portion 5. A connection terminal 112 for connection is arranged on the outer side of the battery mounting portion 6. When the battery pack 100 is attached to the battery mounting portion 6, the connection terminals 112 contact the main body side terminals 9 provided on the housing 2 side to supply electric power to the motor 40. The outer diameter of the motor 40 is smaller than the outer diameter of the fan 65, and the maximum outer diameter of the motor holder 50 is formed larger than the outer diameter of the fan 65.

The main exhaust port 30 is arranged rearward of the center position of the battery pack 100 in the front-rear direction, as indicated by an arrow 29. According to this structure, since the main exhaust port 30 is located on the rear side of the terminal holder 8, the slit forming the main exhaust port 30 can be formed obliquely in the vertical direction. When viewed from the relationship between the main exhaust port 30 and the grip portion, as shown by an arrow 28, the main exhaust port 30 is located behind the center position of the grip portion in the front-rear direction and at a position overlapping the bent portion and the axis A1. To position.

FIG. 4 is a sectional view taken along line AA of FIG. The handle portion 4 and the connecting portion 5 at the rear of the housing 2 have a shape sufficiently smaller than that of the motor housing portion 3 (see FIG. 3). A battery mounting portion 6 is formed below the housing 2 and below the penetrating portion 7. The upper surface of the battery mounting portion 6 is formed as a surface substantially horizontal in the left-right direction and the front-back direction. A terminal holder 8 is provided near the bottom surface of the battery mounting portion 6, and the terminal holder 8 is formed with body-side terminals 9a to 9d extending downward. As can be seen in FIG. 4 when looking forward from the cross section of the AA section, the inside of the connection section 5 is hollow and the rear wall surface of the motor 40 is visible. Rails 6a and 6b for mounting the battery pack 100 are formed on the lower side of the connection portion 5 and are fitted into the rail grooves 102a and 102b of the battery pack 100. On both the left and right sides of the battery mounting portion 6 and in the vicinity of the upper portion, recessed portions 5c and 5d are formed which are recessed inwardly so as to be continuous in the axial direction. The depressions 5c and 5d are provided for providing an air guiding effect for making it difficult for the air discharged from the main exhaust port 30 to hit the hand of the operator who holds the handle 4.

FIG. 5 is a sectional view taken along line BB of FIG. The motor 40 housed in the cylindrical metal case is sufficiently smaller than the size of the inner wall of the housing 2. Therefore, the motor 40 is housed in the inner cylinder portion 51 of the motor holder 50, and plate-like support plates 53 extending upward, downward, rightward, and leftward from the inner cylinder portion 51 are formed, and the respective support plates 53 are formed. The motor 40 is fixed to the housing 2 by engaging the rubber bush 70 with the tip end portion (projection portion 54) formed in a convex shape. That is, the four support plates 53 extend so as to extend at equal intervals in the radial direction from the inner cylindrical portion 51 that accommodates the outer peripheral surface of the motor 40, and the protrusions 54 (reference numeral) are provided at the outer peripheral end portions of the respective support plates 53. (See also FIG. 6). The rubber bushes 70 are arranged so as to be located radially outward of the tips of the protrusions 54. The rubber bushes 70 located on both the left and right sides are arranged inside the insertion hole 19b formed by the rib 18b formed on the inner wall side of the housing 2. The rubber bush 70 positioned in the up-down direction is arranged inside the insertion hole 19a formed by the rib 17b formed on the inner wall side of the housing 2. The ribs 17b are respectively formed in the parts that are divided in the left-right direction on the vertical plane.

The rubber bush 70 has an E-shaped circumferential cross-section that passes through the center point, and is arranged such that its opening portion faces the axis A1. Since the inner wall surface of the housing 2 and the motor holder 50 do not come into contact with each other in this way, the rubber bushes 70, which are 1 to 3 out of the four, elastically elastically move the motor holder 50 in any radial direction. Retained. Further, the vibration of the motor 40 rotating in the circumferential direction is formed so that the elastic force in the circumferential direction becomes weaker than that in the radial direction due to the characteristic shape of the rubber bush 70.

FIG. 6 is a view of the motor holder 50 alone, (A) is a perspective view, and (B) is a side view. The motor holder 50 has a basic skeleton composed of a cylindrical inner cylinder portion 51, a cylindrical outer cylinder portion 55, and a support plate 53 connecting the inner cylinder portion 51 and the outer cylinder portion 55. The inner cylinder portion 51 acts as a holding portion for holding the vicinity of the front end of the motor 40, and a closed bottom surface portion 52 is formed on the front side of the inner cylinder portion 51. At the center of the bottom surface portion 52, a through hole 52a is formed for the output shaft of the motor 40 to pass through. The inner diameter of the through hole 52a is smaller than the inner diameter of the inner tubular portion 51. The inner cylinder part 51 and the outer cylinder part 55 are arranged coaxially along the axis A1, and the outer cylinder part 55 is arranged outside the inner cylinder part 51 in the radial direction centered on the axis A1. The inner cylinder part 51 and the outer cylinder part 55 are connected by four plate-shaped support plates 53 extending in the radial direction. The support plate 53 is connected to four locations on the outer peripheral surface of the inner tubular portion 51, which are spaced apart by 90 degrees in the circumferential direction along the axis A1. Here, the length L1 of the inner tubular portion 51 in the direction of the axis A1 and the length L2 of the outer tubular portion 55 have a relationship of L1>L2, so that the front end sides of the inner tubular portion 51 and the outer tubular portion 55 coincide with each other. Will be placed. The inner diameter of the inner cylinder portion 51 is larger than the outer diameter of the motor 40. The length of the support plate 53 when viewed in the direction of the axis A1 is substantially the same as the length L1 of the inner tubular portion 51, and is provided at the rear radial outer end of the support plate 53 that does not match the outer tubular portion 55. Is formed with a protrusion 54 used for fixing to the housing 2.

A plurality of ribs 56 are formed on the outer peripheral portion of the motor holder 50. The center line E1 of the rib 56 in the thickness direction has a positional relationship inclining with respect to the axis A1 and the vertical plane D1. Therefore, the flow direction in the circumferential direction formed by the rotation of the fan 65 can be guided in a specific direction by the inclination of the plurality of ribs 56, and the air flow can be smoothly formed. The protrusion 54 is arranged inside the outer ends of the plurality of ribs 56 in the radial direction around the axis A1. Therefore, the protrusion 54 does not have to be arranged outside the plurality of ribs 56 in the radial direction centered on the axis A1, so that the radial size of the housing 2 can be prevented from increasing. The center line E1 of the rib 56 of the motor holder 50 in the thickness direction extends so as to be inclined with respect to the axis A1 and with respect to the vertical plane D1 perpendicular to the axis A1. The plurality of ribs 56 are parallel to each other.

A protruding portion 54 is arranged on the rear side (motor 40 side) of the rib 56 and on the outer side in the radial direction of the support plate 53. The projecting portion 54 is a convex portion formed radially outward from the motor holder 50, has a plate shape that is long in the axial direction and thin in the circumferential direction, and is integrally molded of synthetic resin together with other portions of the motor holder 50. Manufactured by. As can be seen from the figure, the outer diameter of the circumscribing circle of the plurality of ribs 56 is larger than the outer diameter of the circumscribing circle of the plurality of protrusions 54. Further, the plurality of protrusions 54 are arranged inside the outer ends of the ribs 56 in the radial direction centered on the axis A1. Here, the motor 40 and the motor holder 50 form a drive unit, and the drive unit is held inside the housing 2. In the present invention, the insertion holes 19a and 19b into which the first elastic portion (rubber bush 70) is fitted are formed on one side of the housing 2 or the drive portion, and the convex portion is formed on the other side. In the example, the convex portion (projection portion 54) is formed on the drive portion side, and the insertion hole is formed on the housing 2 side.

In the motor holder 50, the axial position occupied by the protrusion 54 and the axial position occupied by the fan 65 do not overlap with each other when viewed in the direction along the axis A1. For this reason, it is not necessary to dispose the protrusion 54 outside the fan 65 in the radial direction with respect to the axis A1, so that the inner diameter of the housing 2 can be prevented from increasing, and the space for disposing the rubber bush 70 can be suppressed. Can be easily secured. Further, the flow of air from the space on the side of the fan 65 (fan chamber 11a) to the motor housing chamber 11b (see FIG. 3) can be rectified by the plurality of ribs 56 provided on the motor holder 50. Since the plurality of ribs 56 act as a current plate, the dust collection efficiency in the filter device 95 is improved.

The housing 2 is divided into two parts, a right part and a left part, and a motor holder 50 is sandwiched and fixed between the right part and the left part. In addition, the positional relationship is such that the arrangement range of the protrusion 54 and the arrangement range of the motor 40 overlap each other in the direction along the axis A1. Therefore, the center of gravity of the motor 40 and the protrusion 54 can be brought as close as possible to each other in the direction along the axis A1, the motor 40 can be stably held, and vibration is effectively suppressed. Further, a rubber bush 70 formed of a rubber-like elastic body is interposed between the protrusion 54 and the insertion holes 19a and 19b, and the shape of the rubber bush 70 is characteristic (described later). Further, a rubber cap (second elastic member) 80 formed of a rubber-like elastic body is interposed between the motor rear end holding portion 15 and the rear bearing holding portion 46. Therefore, the vibration of the motor 40 can be suppressed from being transmitted to the housing 2.

FIG. 7 is a sectional view taken along line CC of FIG. In this cross-sectional view, since the horizontal cross section is lower than the axis A1, both the motor holder 50 and the fan 65 appear to have a small diameter. A rubber bush (first elastic portion) 70 is provided on the lower side (bottom surface side) of the housing 2 to hold the motor holder 50. The rubber bush 70 has a rectangular outer edge in a top view, and has long sides located in the circumferential direction around the axis A1 and short sides located in the axial direction. The rubber bush 70 is sandwiched by the front rib 17a and the rear rib 17c when viewed in the direction of the axis A1. The ribs 17a and 17b are connected to each other at the left and right sides in the sectional plane, but the rib 17b reaches the end portion close to the sectional plane, and the center is cut out to form the insertion hole 19a. In this way, the space defined by the end of the rib 17b and the ribs 17a and 17c functions as the insertion hole 19a into which the rubber bush 70 is fitted. The auxiliary exhaust ports 31 are a plurality of slits formed by cutting out the wall surface of the housing 2, and are arranged on both left and right sides.

FIG. 8 is a partial perspective view for explaining how to attach the motor holder 50 to the rubber bush 70, and shows a portion including the vicinity of the cross-sectional position in FIG. 7. The figure shows a state before the protrusion 54 of the motor holder 50 is fitted into the rubber bush 70. The support plate 53 is moved in the direction of arrow 59 with respect to the rubber bush 70 fitted in the fitting hole of the housing 2, and the protruding portion 54 at the radial end is inserted into the insertion hole 75. By thus fitting the protruding portion 54 and the insertion hole 75 with respect to the four rubber bushes 70, the motor holder 50 is elastically held satisfactorily both in the radial direction and in the circumferential direction. Further, the front side and the rear side of the protruding portion 54 in the direction of the axis A1 also come into contact with the rubber portion of the rubber bush 70, so that the motor holder 50 is well elastically held in the axial direction.

FIG. 9 is a cross-sectional perspective view showing how the motor holder 50 is attached to the housing 2. Here, this corresponds to a state in which the right side part of the housing 2 is removed. The motor 40 is housed in a cylindrical metal case 41, and a stator yoke 42 wound with a slightly thick metal plate is attached to the outer peripheral side of the metal case 41. The inner cylinder portion 51 of the motor holder 50 is in good contact with the outer peripheral surface of the stator yoke 42 to form an assembly (driving portion) of the motor 40 and the motor holder 50. In FIG. 9, two rubber bushes 70 that hold the motor holder 50 are provided. The rubber bush 70 on the right side shows a state where it is not attached to the motor holder 50. The fan 65 is a centrifugal fan, and an annular plate 66 is provided on the front side in the axis A1 direction, and a circular plate 67 is provided on the rear side in the axis A1 direction in parallel with the annular plate 66. A plurality of blades 68 are formed between the plates 67. The blades 68 have a shape that extends in a spiral shape from a position spaced a predetermined distance radially outward from the axis A1 to the outer edge position of the annular plate 66, and discharges air radially outward from the side close to the axis A1. To do.

The rear side of the motor 40 is fixed to the motor rear end holding portion 15 via a rubber cap (second elastic portion) 80 that covers the periphery of the rear bearing holding portion 46 (see FIG. 2) that holds the output shaft. .. The motor rear end holding portion 15 is a beam member that extends inward in the radial direction from the side surface of the left housing 2 toward the split surface. Although not visible in the drawing, the same beam is also provided from the side surface of the right housing 2. A member is formed, and the rubber cap 80 is sandwiched by the contact between the two beam members (motor rear end holding portion 15). The rubber cap 80 has a through hole formed in the bottom surface of the rubber member of the container. The through hole is formed in order to avoid contact with the output shaft of the motor 40, and if the output shaft is not exposed to the outside from the metal case 41, it is not necessary to form the through hole or the recess hole.

FIG. 10 is a perspective view of the rubber bush 70. The rubber bush 70 is provided on at least one of the housing 2 and the drive portion, and has an insertion hole 75 into which the convex portion formed on the drive portion is inserted. A long side wall 71 is arranged on the outer side in the axial direction of the rubber bush 70, and a short side wall 72 is arranged on the outer side in the circumferential direction. Inserted hole holding walls 76 and 77 are formed between the short side wall portion 72 and the inserted hole 75. The connecting rib 78 is provided so as to obliquely connect the short side wall portion 72 and the insertion hole holding wall 76, and the short side wall portion 72 and the insertion hole holding wall 77. As shown in the drawings in the radial direction, the axial direction, and the circumferential direction, the rubber bush 70 is configured to have the longest circumferential length, and the convex portion (protruding portion 54) is arranged in the circumferential direction rather than the axial direction. It is formed so as to be easily displaced. Further, the elastic region is formed by providing the hollow portion 79 adjacent to the insertion hole 75 in the circumferential direction of the rubber bush 70 and providing the cavity in the circumferential direction of the elastic body. As a result, the spring constant of the rubber bush 70 in the circumferential direction can be made lower than the spring constant in the axial direction, and the effect of absorbing vibration can be significantly improved.

The hollow portions 79 arranged on both sides of the inserted hole 75 in the circumferential direction can have the same shape as the inserted hole 75 when viewed in the radial direction. However, if they have the same shape, there is a risk of erroneous mounting in which the protrusion 54 is erroneously inserted into the hollow portion 79 side instead of the insertion hole 75 in the manufacturing and assembling process. Therefore, an inhibition portion (connection rib 78) is formed so as to divide the hollow portion 79. The small hollow portion 79 divided by the wall-shaped connecting rib 78 has a pentagonal shape in the radial direction. By changing the plate thickness and the angle of the connecting rib 78, it becomes easy to adjust the amount of elastic deformation of the rubber bush 70 in the circumferential direction.

11A and 11B are views showing the rubber bush 70 alone shown in FIG. 10, in which FIG. 11A is a top view, FIG. 11B is a DD sectional view, and FIG. 11C is an EE sectional portion. The rubber bush 70 is integrally manufactured by molding with synthetic rubber and has a substantially rectangular parallelepiped outer edge. Here, the shape as viewed from the inside in the radial direction has a rectangular outer edge shape as shown in FIG. 10(A), has a length S1 in the axial direction and a length S2 in the circumferential direction, and S2>S1. Have a relationship. In order to weaken the cushioning force of the rubber in the specific direction (here, the circumferential direction), which is formed adjacent to the inserted hole 75 of the protruding portion 54 in the portion visible in this figure. Four hollow portions 79 are formed. As a characteristic of the rubber bush 70, vibration generated from the motor 40 is less transmitted to the housing 2 via the motor holder 50, and conversely, vibration transmission from the housing 2 side to the motor 40 is suppressed. For this purpose, the optimum material and shape are selected in consideration of the natural frequency of the vibration system desired to be vibration-isolated and supported. In the present embodiment, in particular, in order to mitigate the sudden change in the inertial force in the rotation direction of the motor 40, the buffering force of the protrusion 54 of the motor holder 50 in the circumferential direction is increased in order to reduce the sudden change in the inertial force. Therefore, by increasing the size S2 in the circumferential direction and forming the hollow portion 79, the rubber bush 70 can be easily deformed in the circumferential direction to absorb a large impact energy, and after the impact in the circumferential direction. I tried to damp the vibration quickly.

The axial force from the protrusion 54 inserted into the insertion hole 75 is mainly retained by the compressive elastic force of the long side wall portion 71 having the plate thickness t ₁ . The length S1 in the direction of the axis A1 corresponds to the size of the protrusion 54 (see FIG. 6 ), and is formed to be the length S1 obtained by adding twice the plate thickness t ₁ to the axial length of the protrusion 54. .. The radial force from the protruding portion 54 is retained by the compressive elastic force of the bottom surface portion 74 having the plate thickness t ₃ . Radial height S3 of the rubber bushing 70 is formed a plate thickness t ₃ to a size obtained by adding the depth to be inserted in the projection 54. Here, the plate thicknesses t _{1 to} t ₃ are formed to be substantially the same, but the respective thicknesses can be changed. Although the width of the hollow portion 79 as viewed in the circumferential direction is set to be substantially the same as the plate thickness t ₂ , it is not necessary to make the width the same, and any other shape may be used as long as it satisfies the desired performance as the elastic force in the circumferential direction. good.

The sectional view shown in FIG. 10C shows the shape of the insertion hole 75 into which the protrusion 54 is inserted. The insertion hole 75 of the rubber bush 70 has a shape such that the bottom surface is closed by the bottom surface portion 74 having the plate thickness t ₃ , and the protruding portion 54 and the wall surface of the housing 2 are kept in non-contact with each other.

FIG. 12 is a diagram showing a rubber bush 170 according to a modified example of the embodiment of the present invention. In this modification, a rubber bush 170 shown in FIG. 12 is used instead of the rubber bush 70 of the first embodiment. The size of the rubber bush 170 (the outer dimensions S1 and S2) is the same as that of the rubber bush 70 shown in FIG. Further, an insertion hole 175 for inserting the protrusion 54 is formed in the same shape at the same center position as the insertion hole 75 of the rubber bush 70. The long side wall surface of the rubber bush 170 is entirely covered with the long side wall portion 171, and insertion hole holding walls 176 and 177 are formed so as to connect them in the axial direction. 177, an insertion hole 175 for inserting and sucking the protrusion 54 is formed. Although not visible in the figure, the bottom surface of the insertion hole 175 has a bottom surface having the same thickness t ₃ as that of the long side wall 171. In the circumferential direction from the axial center of the inserted hole holding walls 176, 177, instead of forming the short side wall portion 72 shown in FIG. 10, a central rib 178 serving as an inhibition portion extending in the circumferential direction. Is configured.

By providing the central rib 178 as in this modification, the hollow portion 179 exists on the opposite side of the inserted hole holding walls 176, 177 from the inserted hole 75, so that the protrusion 54 moves in the circumferential direction. The rubber bush 70 can be easily deformed in the circumferential direction with respect to, and a large impact energy can be absorbed. Further, in the radial direction, since the wall surface of the bottom surface of the insertion hole 175 abuts on the protrusion 54, it is possible to support the elastic member with a stronger elastic force than the movement in the circumferential direction. Further, since the movement of the protrusion 54 in the direction of the axis A1 is supported by the long side wall 171 having the thickness t ₁ , a strong elastic force similar to that in the radial direction can be secured. Since it is not necessary to provide a bottom surface in the space between the central rib 178 and the long side wall portion 171 that are vertically connected to the plate surfaces of the insertion hole holding walls 176 and 177, that is, in the hollow portion 179. , Not provided here. However, since it is not excluded to provide the hollow portion 179 with the bottom surface, the bottom surface may be provided for manufacturing reasons or for adjusting the elastic force of the rubber bush 170.

FIG. 13 is a view showing a first elastic portion 270 according to the second embodiment of the present invention. Here, the outer peripheral portion of the fan 65 is covered with the fan cover 266, and the motor holder 250 is connected to the fan cover 266, so that the wind is guided toward the rear side in the circumferential direction and the axial direction on the outer peripheral side of the fan 65. The shape is suitable for. The rubber cover 270 is shaped so as to cover the outer peripheral surface of the fan cover 266 and the motor holder 250. The assembly of the motor holder 250 and the fan cover 266 fixed by the rubber cover 270 is sandwiched by the left and right split type housing 2. Protrusions 290 and 292 that project radially outward are formed at four locations on the outer peripheral surface of the rubber cover 270. A fitting hole 217 is formed on the inner wall surface of the housing 2</b>A corresponding to the protrusion 290, and by fitting the protrusion 290 into the fitting hole 217, the motor 40, the motor holder 250, the fan cover 266, and the fan 65. The assembly is stably held in the housing 2A. The fitting hole 217 formed on the side of the housing 2A has a rectangular parallelepiped recess formed on the inner wall surface here, but the fitting hole 217 is formed by using the ribs 17a to 17c of the housing 2 shown in the first embodiment. The shape of the hole may be used.

The fan 65 and the motor 40 are the same as those in the first embodiment, and the fan 65 is fixed to the front end portion of the output shaft 44 of the motor 40. Therefore, the fan 65 is directly driven by the rotation of the motor 40 and rotates in the direction indicated by the arrow R. The function of the motor holder 250 is to hold the motor 40 having a smaller diameter with respect to the fan 65 in substantially the center of the housing 2A, and an inner cylinder portion 251 is formed inside the motor holder 250. The front side of the inner cylindrical portion 251 becomes a disc-shaped bottom portion 252. Here, the bottom surface portion 252 is formed not only to close the front side of the inner cylindrical portion 251, but also to have a disc shape that extends to a position substantially the same as the outer edge position of the fan 65 (outer edge position 252b). A passage 261 having an opening through which the air discharged from the fan 65 flows is formed between the outer edge position 252b of the bottom surface portion 252 and the outer cylinder portion 255. A plurality of passages 261 are formed in the circumferential direction, and the wind flowing in the passage 261 from the front side to the rear side in the axis A1 direction is discharged while rotating around the axis A1. An inclined wall portion 256 is formed so as to incline obliquely rearward along.

The inclined wall portion 256 is connected to a horizontal surface 256a that is flush with the bottom surface portion 252, and an inclined surface 256c that is inclined from the horizontal surface 256a toward the rotation direction R side of the fan 65. The inclined surface 256c is inclined toward the rear side of the axis A1 from the connecting portion 256b with the horizontal surface 256a, and the inclined surface end 256d is an end portion. The position of the inclined surface end 256d is the same as the rear end position of the outer cylindrical portion 255 and the protruding portion 254 when viewed in the direction of the axis A1. A rib 253 extending spirally is formed to form the inclined wall portion 256 and to connect the outer tubular portion 255 and the inner tubular portion 251. The number of the ribs 253 provided corresponds to the number of the inclined wall portions 256, and the inclined wall portions 256 rectify the air discharged from the passages 261 so that the air flows effectively toward the rear of the axis A1.

The outer periphery of the motor holder 250 is covered with an outer cylindrical portion 255 that is short in the axial direction, and a rib-shaped protruding portion 254 is formed on a part of the outer peripheral portion. The protrusions 254 are provided at two locations, an upper side and a lower side when viewed from the axis A1. A rubber cover 270 that covers the fan cover 266 and the entire outer peripheral portion of the motor holder 250 is provided in place of the rubber bush 70 of the first embodiment. The rubber cover 270 is a one-piece product formed by integral molding, and protrusions 290 and 292 are formed at four locations spaced by 90 degrees in the circumferential direction. The protruding portion 290 that protrudes in the vertical direction has a rectangular parallelepiped shape like the rubber bush 70. Further, the protrusion 292 protruding in the left-right direction is also a rectangular parallelepiped like the rubber bush 70. Hollow portions 291 and 293 are provided in the protrusions 290 and 292, respectively, in order to adjust the radial, axial, and circumferential elastic forces of the motor holder 250. In the projecting portion 290, in order to weaken the elastic force in the circumferential direction from the projecting portion 254, an elongated hollow portion which is continuous in the axial direction in the circumferential direction when viewed from the projecting portion 254 is formed. The outer side in the radial direction when viewed from the projecting portion 254 is elastically supported by the plate thickness portion of the projecting portion 290. The axial direction A1 direction when viewed from the projecting portion 254, and the front and rear sides are elastically supported by the plate thickness portion of the projecting portion 290. To be done. Therefore, the motor holder 250 is effectively supported by the compression elastic force of the rubber cover 270 in all directions. In the example of FIG. 13, the protrusions 254 protruding from the motor holder 250 are not provided inside the protrusions 292 provided on both the left and right sides. This is because the four protrusions 290 and 292 are connected to each other by the outer peripheral surface 271 of the rubber cover 270, so that the motor holder 250 and the rubber cover 270 do not come into close contact with each other and the two protrusions at the upper and lower positions. 254 has a stronger implication of alignment than prevention of relative rotation.

As described above, in the second embodiment, the protruding portion is formed directly on the outer peripheral portion of the elastic member (rubber cover 270) formed so as to be continuous in the peripheral direction, and the hollow portion is formed on the protruding portion, so that the protruding portion is formed in the peripheral direction. Since the spring constant and the vibration damping effect are adjusted, it is possible to suppress the transmission of vibration accompanying the rotation of the motor 40 that increases in a specific direction. Further, the elastic force in the radial direction and the circumferential direction of the elastic member can be set arbitrarily by adjusting the size and shape of the hollow portion, so that it is easy to change the spring characteristic in any direction. Further, since the outer peripheral portion of the fan 65 is covered with the rubber cover 270 made of rubber, not only the vibration absorbing effect but also the soundproofing effect is remarkable, and the operating noise of the cleaner can be significantly suppressed.

Although the present invention has been described above based on the embodiments, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention. For example, in the above-mentioned example, the cleaner using the battery pack has been described as an example, but the vibration isolation structure of the cleaner according to the present invention can be similarly applied to a cleaner having a power cord and driven by a commercial power source.

DESCRIPTION OF SYMBOLS 1 cleaner 2, 2A housing 2a opening part 3 motor accommodation part 4 handle part 4a front end part 4b rear end part 5 connection part 5c, 5d recessed part 6 battery mounting part 6a, 6b rail 7 penetration part 8 terminal holder (terminal part) 9 , 9a to 9d Main body side terminal 10 Inlet port 11a Fan chamber 11b Motor housing chamber 11c Connection chamber 11d Handle part space 12a to 12e Screw hole 13b Screw boss 14 Leg 15 Motor rear end holding portion 16 Cylindrical portion 16a Groove 17a to 17c Rib 18b Ribs 19a, 19b Inserted holes 20 Operation panel 21 "Strong" mode button 22 "Weak" mode button 23 "Off" button 24 Notification lamp 25 Control circuit board 30 Main exhaust port 31 Auxiliary exhaust port 40 Motor 41 Metal case 42 Stator Yoke 44 Output shaft 46 Rear bearing holding portion 50 Motor holder 51 Inner cylinder portion 52 Bottom surface portion 52a Through hole 53 Support plate 54 Projection portion 55 Outer cylinder portion 56 Rib 59 Moving direction 65 Fan 66 Circular plate 67 Disc plate 68 Blade 70 Rubber bush (first elastic part) 71 Long-side side wall part 72 Short-side side wall part 74 Bottom part 75 Inserted holes 76, 77 Inserted hole holding wall 78 Connecting rib (inhibiting wall part)
79 Hollow part 80 Rubber cap (second elastic part)
90 Dust Case 91 Opening 92 Nozzle 92a Air Intake 93 Convex 95 Filter Device 100 Battery Pack 101 Latch Buttons 102a, 102b Rail Groove 112 Connection Terminal 170 Rubber Bushing 171 Long Side Side Wall 175 Inserted Hole 176 Inserted Hole Holding Wall 178 Central rib 179 Hollow part 217 Fitting hole 250 Motor holder 251 Inner cylinder part 252 Bottom part 252b Outer edge position 253 Rib 254 Projection part 255 Outer cylinder part 256 Inclined wall part 256a Horizontal surface 256b Connection part 256c Inclined surface 256d Inclined surface end 261 Passage 266 fan cover 270 rubber cover (first elastic part)
271 Outer peripheral surface 290, 292 Projection part 291, 293 Hollow part A1 (motor) output axis B1 (dust case) rotation axis C1-C2 Inhaled air flow D1 Vertical surface E1 center line

Claims (12)

Housing,
A drive unit housed in the housing and having an output shaft;
A fan fixed to the output shaft for generating a suction force,
A first elastic part interposed between the housing and the drive part to support the drive part,
The first elastic portion is interposed between the housing and the drive portion in the axial direction and the circumferential direction of the output shaft, and the drive portion is easily displaced in the circumferential direction rather than the axial direction. Cleaner characterized by being performed. The first elastic portion has an insertion hole into which a convex portion provided in at least one of the housing and the drive portion is inserted, and the convex portion is likely to be displaced in the circumferential direction rather than the axial direction. The cleaner according to claim 1, wherein the first elastic portion is formed as described above. The cleaner according to claim 2, wherein the first elastic portion has a hollow portion adjacent to the insertion hole in the circumferential direction. The cleaner according to claim 3, wherein the hollow portion has an inhibition portion for inhibiting the protrusion of the convex portion. The convex portion is provided on one of the housing or the driving unit,
The cleaner according to claim 3, wherein a fitting hole into which the first elastic portion is fitted is provided in the other of the housing and the drive portion. The convex portion is long in the axial direction and has a thin plate shape in the circumferential direction,
The cleaner according to claim 2, wherein the size of the first elastic portion in the circumferential direction is larger than the size in the axial direction. The drive unit is
A motor having the output shaft,
A holder that supports the motor and is supported by the first elastic portion,
Have
The outer diameter of the motor is smaller than the outer diameter of the fan,
The cleaner according to claim 1, wherein an outer diameter of the holder is larger than an outer diameter of the fan. The holder has a plurality of ribs that are separated from each other in the circumferential direction and that extend from the motor to the radial outside.
The cleaner according to claim 7, wherein each of the first elastic portions is provided so as to be in contact with a radially outer end portion of each of the plurality of ribs. 9. The cleaner according to claim 8, wherein the plurality of ribs are provided so as to extend in a radial direction at equal intervals from a cylindrical portion that houses the outer peripheral surface of the motor. The housing is provided with an intake port on the front side of the fan and an exhaust port on the rear side of the drive unit when viewed in the axial direction.
A dust case having a suction port for sucking dust is provided in front of the intake port of the housing, and a connection part to which a battery pack is connected is provided on the rear side of the housing and near the exhaust port. The cleaner according to any one of claims 7 to 9, which is characterized. The first elastic portion contacts the drive portion on the fan side with respect to the center of the drive portion in the axial direction,
The cleaner according to any one of claims 1 to 10, further comprising a second elastic portion that is in contact with the drive portion on a side opposite to the fan with respect to the center of the drive portion in the axial direction. The drive unit has a protrusion that protrudes in the axial direction on the side opposite to the fan in the axial direction,
The cleaner according to claim 11, wherein the second elastic portion is an elastic member having a tubular portion that accommodates the protrusion therein.

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