JPH0641651U - Motor holding device - Google Patents

Abstract

(57) [Summary] [Structure] A rubber shock absorber 29 is attached to the motor head 25 of the electric blower 21 in the electric vacuum cleaner body 1. The upper and lower cases 2a, 2b are formed with upper and lower rib rear portions 46, 48 which are opposed to each other and protrude in a concave arc shape along the outer peripheral surface of the motor head 25.
The upper and lower ribs holding portions 50 of the rear portions 46 and 48 fix the cushioning member 29.
Both ends of the vertical direction of 38 are sandwiched, and the ends of the locking portions 52 of the rear portions 46, 48 of the upper and lower ribs are inserted into the engaging recesses 36. The protruding portion 37 of the fixed portion 38 is inserted between the sandwiching wall portion 50 and the locking portion 52, the tips of the upper and lower rib rear portions 46 and 48 are brought into contact with the outer peripheral surface of the insertion portion 34, and the rear end portion of the electric blower 21. Pinch and fix. [Effect] The deformation of the fixing portion 38 is suppressed, and the protrusion 37 holds the holding wall portion.
Since it does not deform so as to get over 50, it is possible to prevent rotation of the electric blower 21 due to inertial force during startup or during driving. The failure due to the rotation of the electric blower 21 can be prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a holding device for an electric motor, which clamps and fixes the electric motor via a cushioning member between ribs of a case body that face each other.

[0002]

[Prior art]

 Conventionally, as a holding device for this type of electric motor, for example, as shown in FIGS. 5 and 6, when an electric blower 72, which is an electric motor provided in an electric vacuum cleaner body 71, is engaged and fixed, this electric blower is used. A configuration is known in which a buffer 73 is attached to 72, and the buffer 73 is sandwiched and fixed by rib portions 75, 76, 77, 78 projecting in opposition to the case body 74 of the electric vacuum cleaner body 71.

In the motor holding device shown in FIG. 5, the electric vacuum cleaner body 71 includes a lower case 80 having an open upper surface, and an upper case 81 for closing a rear upper surface of the lower case 80 with a front upper surface portion. A case body 74 is formed by opening and joining, and a lid body 82 that rotatably closes the opening of the front upper surface portion of the case body 74 is pivotally formed.

Then, the lower surface of the upper case 81 projects downward, and the lower end thereof projects toward the front end side where the intake port 83 of the electric blower 72 is opened and to the rear of the rear end of the electric blower 72. An upper rib front portion 75 and an upper rib rear portion 76, which are formed in a concave arc shape, are formed to project along the outer peripheral surface of the motor head 84 to be formed. Further, on the upper surface of the lower case 80, the upper rib front portion 75 and the upper rib rear portion 76 are opposed to each other and project upward, and the upper end portions are located on the outer peripheral surfaces of the front end side and the rear end portion of the electric blower 72. A lower rib front portion 77 and a lower rib rear portion 78, which are formed in a concave arc shape, are formed to project. Further, as shown in FIG. 6, the upper and lower rib rear portions 76 and 78 are provided with sandwiching wall portions 86 which are substantially vertical in the rear direction on both sides in the vertical direction, which is a longitudinal direction with a U-shaped cross section, and which are sandwiched substantially in the center. A locking portion 87 is formed so as to project in the same direction as the wall portion 86, and has an E-shaped cross section.

An annular rubber support 88 is fitted around the outer periphery of the front end of the electric blower 72, and a shock absorber 73 is engaged with the motor head 84 of the rear end. The cushioning body 73 is a rectangular parallelepiped made of rubber and has a substantially square shape in a plan view. A flange portion 92, which is in contact with the rear end surface of the electric blower 72, is integrally formed in a circular shape from the peripheral edge of a plane forming 90.

Then, the holding wall portions 86 of the upper and lower rib rear portions 76 and 78 hold the fixed portion 91 of the shock absorber 73 fitted to the motor head 84 of the electric blower 72 in the left-right direction, and the upper and lower rib rear portions 76, 78. The end of the locking portion 87 of 78 holds the fixing portion 91 in the up-down direction, and the rear end of the electric blower 72 is held and fixed by the upper and lower rib rear portions 76 and 78 via the cushioning body 73. ing. The upper and lower rib front portions 75 and 77 clamp the outer peripheral surface of an annular rubber support 88 that fits on the front end of the electric blower 72 to support the front end of the electric blower 72 with rubber. The upper and lower rib front portions 75 and 77 are sandwiched and fixed via the body 88.

The front end side of the electric blower 72 is hermetically sealed by a rubber support 88 in a dust collecting chamber 95 provided with a dust collecting bag 94 for collecting the dust sucked together with air by the intake port 83 of the electric blower 72. It is in communication.

[0008]

[Problems to be solved by the device]

 However, in the holding device for the electric blower 72, which is the electric motor in the electric vacuum cleaner body 71 having the above-described conventional configuration, since the fixing portion 91 of the cushioning body 73 is formed in a substantially square shape in a plane, the height of the electric blower 72 of recent years is high. With the increase in output, due to the large inertial force that acts when the high-output electric blower 72 is started, the fixed portion 91 that is held between the holding wall portion 86 and the locking portion 87 of the rear portions 76 and 78 of the upper and lower ribs is fixed to the electric blower 72. The elastic force of the fixed portion 91 is lower than the inertial force, and the corner portions of the fixed portion 91 may be deformed to get over the holding wall portions 86 of the rear portions 76 and 78 of the upper and lower ribs, and the electric blower 72 may rotate. Further, the rotation of the electric blower 72 may cause a failure such as disconnection of a lead wire connected to the electric blower 72.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a holding device for an electric motor that can reliably fix the electric motor.

[0010]

[Means for Solving the Problems]

 The motor holding device of the present invention includes a case body formed of at least two cases facing each other, a rib portion projectingly formed to face each case of the case body, and fixed to the electric motor. A shock absorber that is attached and fixed between the tips of the ribs to support and fix the electric motor, wherein the ribs sandwich and fix the shock absorbers in a direction intersecting the facing opposing direction; The cushioning body has a locking portion that locks both opposite ends of the cushioning body, and the cushioning body has a convex or concave engaging portion that is locked to the locking portion of the rib portion. , The locking portion of the rib portion is locked to the engaging portion of the cushioning body, and both sides of the cushioning body in opposite facing directions are sandwiched by the sandwiching portions of the rib portion and facing each other. Clamp between the tips of the ribs It is intended to fix the motor.

[0011]

[Action]

 The holding device for the electric motor according to the present invention includes a buffer for supporting and fixing the electric motor, and the engaging portion of the buffer is engaged with the engaging portion of the rib portion projectingly formed to face the case. The sandwiching part is sandwiched and fixed in the direction intersecting the opposing direction of the rib part of the shock absorber, and sandwiched and fixed between the tips of the opposite rib parts, and the electric motor is sandwiched and fixed through the shock absorber in the case body. Therefore, the buffer body is less likely to be deformed, and even if an inertial force is exerted at the time of starting the electric motor, the buffer body is prevented from overriding the pinching portion of the rib portion and rotating the electric motor. In addition, in order to prevent rotation of the electric motor, it is also possible to prevent breakage of the lead wire connected to the electric motor.

[0012]

【Example】

 An embodiment of a motor holding device of the present invention will be described below with reference to the drawings in accordance with the configuration used in an electric vacuum cleaner.

In FIG. 1, reference numeral 1 denotes an electric vacuum cleaner body, which is composed of a lower case 2a having an open upper surface and an upper case 2b closing the rear upper surface of the lower case 2a. It is composed of a main body case 2 as a case body having an opened upper surface portion, and a lid body 3 for closing the opening of the front upper surface portion of the main body case 2 in an openable and closable manner. Further, the main body case 2 has a swivel wheel 5 that can swivel on the lower surface on the front side, and a driven rear wheel 6 on the rear side. Further, an upper handle 7 is pivotally attached to the upper part of the main body case 2, and a concave front handle 8 is provided on the lower surface of the front part of the lower case 2a.

On the other hand, inside the electric vacuum cleaner body 1, a partition chamber 12 having a grid-shaped communication port 11 defines a dust collection chamber 13 whose upper side is open and is formed in the front portion of the dust collection chamber 13. An electric blower room 14 is formed behind the room 13. A dust bag 16 is detachably mounted in the dust collection chamber 13 by a holder 15 pivotally mounted in the dust collection chamber 13.

An auxiliary dust collecting filter 17 that covers the communication port 11 is detachably attached to the front surface of the partition wall 12. The dust collecting bag 16 and the auxiliary dust collecting filter 17 are attached and detached via the upper opening of the dust collecting chamber 13.

On the other hand, in the electric blower chamber 14, an electric blower 21 as an electric motor is arranged. The electric blower 21 is composed of an electric section 22 (not shown) that rotates and drives a fan, and a fan cover 23 that covers the fan. An intake port 24 is formed in the center of the front surface of the fan cover 23, and an exhaust port (not shown) is formed in the frame of the electric section 22.

A motor head 25, in which a bearing for supporting a shaft (not shown) for rotationally driving the fan is provided, is formed in a cylindrical shape rearward at a substantially central portion of the rear end surface of the electric section 22. As shown in FIG. 2, a substantially circular insertion hole 26 is formed in the frame on the rear end surface of the electric section 22 in the vicinity of both sides of the motor head 25 in the horizontal direction.

An annular rubber support 28 is fitted to the outer peripheral edge of the front end of the electric blower 21, and a rubber shock absorber 29 is attached to the motor head 25 of the rear end. ing .

As shown in FIGS. 1 to 4, the cushioning body 29 is provided with an insertion recess 31 that is recessed in a substantially circular shape into which the motor head 25 is inserted. In order to radiate heat from the motor head 25, a cylindrical insertion portion 34 is formed on the periphery of the portion 31 in which an annular heat radiation portion 33 radially defined by a plurality of reinforcing walls 32 is formed. Has been done. Further, on the other end surface side of the insertion portion 34, engaging recesses 36 are formed as recessed engaging portions at substantially the centers of both ends in the vertical direction, and the upper and lower sides of the engaging recessed portions 36 in the width direction are arranged vertically. Protrusions 37 are formed so as to project in the respective directions, and a fixing portion 38 having a substantially H-shaped plane is formed. A reinforcing portion 39 is formed thickly at a portion of the heat dissipating portion 33, which is located at the base end of the diagonal protruding portion 37 in the plurality of divided portions.

In addition, a flange portion 42 having a flange portion 41 that protrudes in a substantially circular shape in the outer peripheral direction and further protrudes in a semicircular shape in the horizontal direction is formed on the peripheral edge of the insertion portion 34 on the one end face side where the insertion concave portion 31 opens. Are formed. Further, a substantially columnar boss portion 43 that engages with the insertion hole 26 of the electric portion 22 that projects toward the side where the insertion recess 31 is opened is formed substantially at the center of the collar portion 41.

Then, the insertion recess 31 of the insertion portion 34 is engaged with the motor head 25 of the electric portion 22, and the boss portion 43 of the collar portion 41 is engaged with the insertion hole 26 of the electric portion 22, The buffer portion 29 is attached so that the flange portion 42 contacts the rear end surface of the electric portion 22 and the shock absorber 29 covers the rear end surface of the electric portion 22.

On the other hand, on the lower surface of the upper case 2b, an upper rib front portion 45 as a rib portion protruding downward and having a lower end portion formed in a concave arc shape along the outer peripheral surface of the fan cover 23, and The upper rib rear portion 46 is located rearward of the upper rib front portion 45 and projects downward substantially in parallel with the lower end portion as a rib portion formed in a concave arc shape along the outer peripheral surface of the motor head 25 of the electric portion 22. Are formed so as to project.

Further, on the upper surface of the lower case 2 a, the upper rib front portion and the upper rib rear portion are opposed to each other and project upward, and the upper end portion is recessed along the outer peripheral surface of the fan cover 23. A lower rib front portion 47 serving as an arc-shaped rib portion and a lower rib rear portion 48 serving as a rib portion having an upper end portion formed in a concave arc shape along the outer peripheral surface of the motor head 25 of the electric portion 22 respectively project. Is forming.

Further, as shown in FIGS. 1 and 4, the upper and lower rib rear portions 46, 48 have a sandwiching wall portion 50 as a sandwiching portion substantially vertically rearward on both sides in the vertical direction which is the longitudinal direction and having a U-shaped cross section. Engagement wall portions 51 are formed so as to protrude, and the front end edges of the sandwiching wall portions 50 are further substantially vertically opposed to each other with a gap therebetween. Further, a locking portion 52 having a semicircular cross section that projects in the same direction as the sandwiching wall portion 50 is formed at a substantial center of the upper and lower rib rear portions 46, 48, and the upper and lower rib rear portions 46, 48 are formed. It has an E-shaped cross section.

The upper and lower rib rear portions 46, 48 hold the holding wall portions 50 between the upper and lower ends of the fixing portion 38 of the shock absorber 29 attached so as to cover the motor head 25 of the electric blower 21. The ends of the locking portions 52 of the rib rear portions 46 and 48 are inserted into the engaging recesses 36 of the fixed portion 38, and the projections 37 of the fixed portion 38 are provided between the holding wall portion 50 and the locking portion 52. The upper and lower rib rear portions 46, 48 are inserted between the flange portion 42 and the fixed portion 38, and are brought into contact with and sandwiched by the outer peripheral surface of the insertion portion 34. The rear end portion of the electric blower 21 is sandwiched and fixed by the upper and lower rib rear portions 46 and 48 via the cushioning body 29.

Further, the outer peripheral surface of an annular rubber support body 28 fitted to the front end portion of the electric blower 21 is sandwiched and fixed by the upper and lower rib front portions 45 and 47, and the front end portion of the electric blower 21 is fixed to the rubber support body. The upper and lower ribs 45 and 47 are sandwiched and fixed via 28.

The front end side of the electric blower 21 is provided with a rubber support 28, which communicates with a dust collection chamber 13 provided with a dust bag 16 for collecting the dust sucked with the air by the intake port 24 of the electric blower 21. It communicates airtightly via 11.

An exhaust chamber 54 is formed in the electric vacuum cleaner body 1 at the rear of the electric blower chamber 14, and an exhaust gas is exhausted from the outer rear surface of the upper case 2b of the electric vacuum cleaner body 1. An exhaust port 55 communicating with the exhaust port of the electric blower 21 through the chamber 54 is formed.

The lid 3 has a rear end pivotally attached to the upper case 2b, and covers the dust collecting chamber 13 from above so as to be openable and closable. Further, the upper surface of the lid body 3 is formed with an accessory storage portion 57 for accommodating accessories (not shown) in a concave shape, and the storage portion flush with the outer peripheral surface of the lid body 3 for closing the upper surface of the accessory storage portion 57. A cover 58 is attached so that it can be opened and closed.

A suction part 61 sandwiched between the upper case 2b and the lower case 2a is provided in the front part of the electric vacuum cleaner body 1, and the suction part 61 has an inner opening 62 and an outer opening 63 which are opposed to each other. It is formed facing. Further, a cylindrical suction port 64 is formed in the middle opposite to the inner opening 62 and the outer opening 63. A front portion of the suction port 64 is opened to the front of the electric vacuum cleaner body 1, and a rear portion thereof is opened to the dust collecting chamber 13.

A shutter 65 that slidably closes a suction port 64 that connects the dust collection chamber 13 to the outside of the electric vacuum cleaner body 1 is slidably supported on the suction unit 61. A knob 66 is formed on the upper end of the shutter 65 so as to project forward.

Next, the operation of the above embodiment will be described.

At the time of normal cleaning, the lid body 3 is closed, power is supplied from a power cord (not shown), and the shutter 65 is slid downward to open the suction port. With the shutter 65 open, a hose body (not shown) is connected to perform cleaning. By driving the electric blower 21, dust is sucked together with air from the suction port 64 through the hose body, is guided to the dust collecting chamber 13 of the electric vacuum cleaner body 1, and is trapped in the dust collecting bag 16.

Further, the air filtered by the dust bag 16 is supplied to the auxiliary dust collecting filter 17, the communication port 11, the intake port 24 of the electric blower 21, the inside of the electric blower 21, the exhaust port of the electric blower 21, and the exhaust chamber. The air is exhausted from the exhaust port 55 to the outside air outside the electric vacuum cleaner body 1 as exhaust air through the air passages 54 in sequence. When the electric vacuum cleaner body 1 is stored, a power cord (not shown) is stored, the hose body is removed, and the shutter 65 is slid upward to close the suction port 64. Further, the used accessories (not shown) are stored in the accessory storage portion 57 of the lid 3.

When the electric blower 21 is activated, a large inertial force is generated in the electric blower 21 in a direction opposite to the rotation direction of the shaft (not shown) of the electric section 22. This inertial force is applied to the rubber support 28 and the buffer 29 that support the electric blower 21. It should be noted that the force against the inertial force needs to be greater in the cushioning member 29 closer to the central axis than in the rubber support 28 farther from the central axis of the electric blower 21. In particular, an inertial force is applied so as to deform the protrusion 37.

However, the shock absorber 29 is clamped by the tips of the rear portions 46, 48 of the upper and lower ribs and fixed by friction, and the fixing portion 38 of the shock absorber 29 is fixed by the retaining wall portions of the rear portions 46, 48 of the upper and lower ribs. The engaging recess 36 of the fixed portion 38 is engaged with the engaging portion 52 of the rear portions 46 and 48 of the upper and lower ribs, and the protrusion 37 is sandwiched between the retaining wall portion 50 and the engaging portion 52. As a result, the protrusion 37 is less likely to be deformed. Furthermore, since the reinforcing portion 39 is provided at the base end of the protruding portion 37, it is difficult to deform, and when the protruding portion 37 deforms, the fixing portion 38 swells rearward and deforms. Therefore, the deformation of the fixed portion 38 is suppressed, and the protrusion 37 can be prevented from deforming so as to get over the holding wall portion 50. Therefore, it is possible to prevent the electric blower 21 from rotating due to the inertial force at startup and the inertial force during driving, and it is also possible to prevent a failure such as disconnection of a lead wire connected to the electric blower 21 due to the rotation of the electric blower 21. . Further, it is not necessary to add ribs 45, 46, 47, 48 to prevent the rotation of the electric blower 21, so that the manufacturability of the electric vacuum cleaner body 1 is not lowered and the manufacturing cost is not increased. The rotation of the electric blower 21 can be prevented without increasing the size of the cleaner body 1. Further, since the fixing portion 38 of the cushioning body 29 is formed in a flat H-shape having the projection portion 37 and the engaging recess portion 36, the contact area with the rib portions 46 and 48 becomes large, and the cushioning body 29 is required to be the minimum required. With the limit size, it is possible to reliably prevent the rotation of the electric blower 21.

In the above embodiment, the holding of the electric blower 21 of the electric vacuum cleaner body 1 has been described, but the present invention can be applied to holding any electric motor.

Further, the description has been given by engaging the engaging recess formed in a concave shape as the engaging portion with the engaging portion protruding in a semicircular shape. However, the engaging portion is formed in a convex shape and the engaging portion is formed. It can be formed in a concave shape.

[0039]

[Effect of device]

 According to the holding device for an electric motor of the present invention, when the buffer for supporting and fixing the electric motor is engaged with the engaging portion of the shock absorber, the engaging portion of the rib portion projectingly formed facing the case is engaged. In both cases, the sandwiching portion of the rib portion is sandwiched and fixed in a direction intersecting the facing direction of the rib portion of the cushioning body, and sandwiched and fixed between the tips of the opposing rib portions, and the electric motor is cased through the cushioning body. Since it is clamped and fixed in the body, the cushioning body is less likely to deform, and even if inertial force acts when the electric motor is started, it is possible to prevent the cushioning body from overcoming the nipping portion of the rib portion and rotating the electric motor due to the deformation. Further, since the rotation of the electric motor can be prevented, it is possible to prevent a failure such as disconnection of the lead wire connected to the electric motor.

[Brief description of drawings]

FIG. 1 is a side sectional view of a vacuum cleaner body showing an embodiment of a motor holding device according to the present invention.

FIG. 2 is a perspective view of the same cushioning body.

FIG. 3 is a sectional view of the same buffer body.

FIG. 4 is an explanatory view of a situation in which a shock absorber is attached to the rear portions of the upper and lower ribs.

FIG. 5 is a side sectional view of an electric vacuum cleaner body showing an embodiment of a conventional motor holding device.

FIG. 6 is an explanatory view of a situation in which a shock absorber is attached to the rear portions of the upper and lower ribs.

[Explanation of symbols]

 2 Main body as case body 2a Case as lower case 2b Case as upper case 21 Electric blower as electric motor 29 Cushioning body 36 Engagement concave portion 45 as engaging portion 45 Upper rib front portion as rib portion 46 As rib portion Upper rib Rear part 47 Lower rib front part as rib part 48 Lower rib rear part as rib part 50 Clamping wall part as a clamp part 52 Locking part

Claims (1)

[Scope of utility model registration request] 1. A case body formed of at least two cases facing each other, a rib portion projectingly formed so as to face each case of the case body, and the rib portion fixedly attached to an electric motor. A cushioning body that is sandwiched and fixed between the front ends of the buffer body to support and secure the electric motor, and the rib portion is a sandwiching portion that sandwiches and fixes the cushioning body in a direction intersecting a facing opposing direction, and the cushioning body is opposed to each other. Direction, the buffer body has a convex-shaped or concave-shaped engagement portion that is locked to the locking portion of the rib portion, and the buffer body has the locking portion. The locking portion of the rib portion is locked to the joint portion, and both sides of the cushioning body in opposite facing directions are clamped by the clamping portions of the rib portion, and between the tips of the opposing rib portions. The electric motor is fixed by sandwiching and fixing. Holding device for an electric motor characterized by Rukoto.