JPH08126596A - Suction device for vacuum cleaner - Google Patents

Abstract

PURPOSE: To provide a vacuum cleaner suction device capable of actuating a rotary brush and a driving wheel with a single power source, generating a rotating condition for keeping the pertinent operability and dust collecting function of the brush and the wheel, and protecting a cleaning surface against damages. CONSTITUTION: This device has a sun gear 11 jointed to a motor 2 for rotation depending on the driving force thereof, a planetary gear 12 engaged with the sun gear 11 for revolution thereabout to transmit rotational motion to a rotary brush 3 as a driving force, and a driving wheel 21 having the same rotation center as the sun gear 11 and an inner gear 13 on the internal surface thereof for engagement with the planetary gear 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an electric vacuum cleaner provided with a suction brush and a rotary brush and a drive wheel, and a rotary motion control of the rotary brush and the drive wheel.

[0002]

2. Description of the Related Art As a conventional electric vacuum cleaner, there is a vacuum cleaner equipped with a rotary brush that scrapes up a deep portion of dust such as a carpet so as to suck the dust. In such a case, in order to improve the suction force, in recent years, the rotating brush is rotated at a higher speed to operate to improve the dust collecting performance. Also, as the suction power of the suction motor of the cleaner body is increased by increasing the suction power, the suction force on the cleaning surface becomes higher and the operability is impaired. In some cases, the suction device is provided with a propulsive force to reduce the cleaning operation.
In this case, the rotating brush and the driving wheel share a motor as a power source, thereby realizing simplification, weight reduction, and cost reduction of the device.

However, there are problems that the rotating brush rotates at a high speed and the carpet surface is unnecessarily damaged, or the driving wheel rotates at a high speed to slip the cleaning surface and damage the cleaning surface. It was To solve such a problem, for example, Japanese Patent Laid-Open No. 5-1922
There is one disclosed in Japanese Patent Laid-Open No. 72. FIG. 9 is a partial cross-sectional view showing the suction device of the electric vacuum cleaner disclosed in the publication, and in the figure, 51 is a rotary brush built in the suction device.

Reference numeral 52 is a shaft which is fixed to one side of the rotary brush 51 and serves as a rotary shaft. 53 is a bearing which supports the shaft 52 at the other end of the shaft 52. 54 is a shaft between the shafts 52. 5
Gears A54 and 55 fixed to 2 are similarly gears fixed to the shaft 52 between the shafts 52, and 56 is a belt for connecting the gear 55 and a motor (not shown) to transmit the rotational driving force of the motor to the shaft 52. Reference numeral 57 denotes a gear B composed of a plurality of gears which mesh with the gear A54 and rotate as a planetary gear. Reference numeral 58 denotes a gear B5 having an inner periphery.
Reference numeral 7 denotes an internal gear that meshes with and rotates with 7, and 59 denotes a drive wheel of the suction device that forms the outer peripheral surface of the internal gear 58. Then, the gear A54, the gear B57 and the internal gear 58 constitute a planetary gear mechanism.

Next, the operation will be described. The rotational driving force from the motor is transmitted to the gear 55 via the belt 56, and the rotation of the shaft 52 causes the rotating brush 51 to rotate to scrape up the dust on the cleaning surface. The scraped dust is sucked from a suction pipe (not shown). On the other hand, when the gear A54 rotates in response to the rotation of the shaft 52, the gear B57 and the internal gear 58 rotate in conjunction with this, and as a result, the drive wheel 59 rotates at a lower speed than the rotating brush 51. In this publication, the drive wheel 59 can obtain 1000 revolutions per minute while the rotating brush 51 can rotate 4000 revolutions per minute. With such a structure, the drive wheel 59 can be rotated with respect to the rotation speed of the rotating brush 51.
It becomes possible to decelerate the rotation speed of.

[0006]

Since the suction device of the conventional vacuum cleaner is constructed as described above, the number of rotations of the drive wheel 59 is reduced with respect to the number of rotations of the rotating brush 51 to collect dust. Although the damage to the cleaning surface due to the slip of the drive wheel 59 can be reduced while improving the performance, the rotating speed of the rotating brush 51 is constant at a high speed, and therefore the carpet is still damaged and the drive wheel 59 also rotates. Since the speed is reduced at a constant reduction ratio with respect to the rotation speed of the brush 51, the drive wheel 59 still slips due to the difference in the state of the cleaning surface such as the carpet and the plate surface, and the problem of damaging the cleaning surface is solved. It was something that could not be achieved.

[0007] Further, in the cleaning, for example, between the plates, which does not require the rotation of the rotating brush 51, the cleaning operation is performed with the motor stopped (the sliding operation of the suction device with respect to the cleaning surface).
Since the gear A54 also rotates with the rotation of the drive wheel 59, the motor is rotated from the shaft 52 via the rotating brush 51, the gear 55 and the belt 56, and a very heavy operating force is required for the operation. There was a problem that The present invention has been made to solve the above-mentioned problems, and a rotary brush and a drive wheel are driven by one power source with a simple configuration using a planetary gear mechanism, and these are operability. It is an object of the present invention to obtain a suction device for an electric vacuum cleaner which is in a rotating state where the dust collecting performance is suitable and which does not damage the cleaning surface.

[0008]

SUMMARY OF THE INVENTION A suction device for an electric vacuum cleaner according to the present invention includes a sun gear which is connected to a motor and rotates according to the driving force of the motor, and an sun gear which meshes with the sun gear and revolves around the sun gear. A planetary gear connected to the rotating brush so as to transmit the rotational movement as a rotational driving force to the rotating brush, and a drive wheel having an internal gear that has the same rotation center as the sun gear and that meshes with the planetary gear on the inner circumference. Be prepared.

Further, it is provided with a planetary gear locking means which can restrict the planetary gear from revolving around the sun gear. Further, it is provided with a sun gear lock means that can regulate the rotation of the sun gear. Further, it is provided with a switch means for interrupting the rotational drive of the motor to the sun gear when the sun gear lock means restricts the rotation of the sun gear.

The sun brush, which is connected to the motor and rotates according to the driving force of the motor, and the rotary motion, which meshes with the sun gear and is connected to the rotary brush and revolves around the sun gear, are used as the rotary driving force. Drive gear having a planetary gear that transmits to the sun gear, an inner gear that has the same rotation center as the sun gear and that meshes with the planetary gear on the inner circumference, and a planetary gear lock that makes it possible to regulate the revolution of the sun gear by the planetary gear. Means, a sun gear lock means for restricting rotation of the sun gear, and a switching means for selectively activating the planet gear lock means and the sun gear lock means.

[0011]

In the suction device of the electric vacuum cleaner according to the present invention, the motor is connected to the sun gear of the planetary gear mechanism, and the revolution movement of the planet gear is transmitted as the rotation movement of the rotating brush to drive the internal gear. By configuring as a wheel, the rotational speed of the rotating brush is variably reduced with respect to the rotational speed of the motor. Further, when the drive wheel comes into contact with the cleaning surface, the resistance applied to the drive wheel is replaced by the rotational force of the rotating brush, and the drive wheel comes into contact with the cleaning surface without slipping.

Further, the planetary gear locking means restricts the revolution of the planetary gears, and when the motor is energized, the rotation of the rotating brush is stopped and only the drive wheels are rotated. Even when the motor is stopped, the planet gears can rotate, so that the drive wheels can freely rotate with the rotating brush stopped. In addition, the rotation of the sun gear is restricted by the sun gear locking means, and in the cleaning operation when the motor is stopped, the sun gear and the motor are not rotated with the rotation of the drive wheel, and the rotation speed of the drive wheel is lower than that of the drive wheel. The rotating brush rotates.

Further, the switch means interrupts the transmission of the rotational driving force from the motor to the sun gear in conjunction with the operation of the sun gear lock means, and the motor is locked when the rotation of the sun gear is restricted by the operation of the sun gear lock means. To prevent Further, the switching means selectively enables either one of the planetary gear locking means and the sun gear locking means to prevent both of them from operating at the same time. This prevents the revolution of the planetary gear and the rotation of the sun gear from being restricted at the same time.

[0014]

【Example】

Example 1. Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an upper sectional view showing a suction device of an electric vacuum cleaner according to the present invention. In the figure, 1 is a suction device body mounted on a suction pipe of a vacuum cleaner, and 2 is a suction device body 1. The driving motor 3 is a rotatable brush that scoops up dust when cleaning a carpet or the like, and is disposed inside the suction device body 1 so that the lower surface faces the cleaning surface. Reference numeral 4 denotes a motor-side pulley fixed to the drive shaft of the motor 2, 6 denotes a brush-side pulley fixed to an input shaft 9 described later, and 5 denotes a motor-side pulley that is stretched between the motor-side pulley 4 and the brush-side pulley. Drive force input shaft 9
It is a belt that transmits to.

Reference numeral 7 is a planetary gear mechanism that is interposed between the input shaft 9 and the rotary brush 3 and transmits the rotational driving force of the motor 2 to the rotary brush 3. Reference numeral 8 is opposite to the planetary gear mechanism 7 of the rotary brush 3. It is an auxiliary wheel that is provided laterally on the side and that facilitates the cleaning operation in which the suction device body 1 moves back and forth. FIG. 2 is a partial side sectional view showing in detail the planetary gear mechanism 7 and its peripheral mechanism portion. In the figure, 9 is an input shaft fixed to the brush side pulley 6 and 10 is a suction device body 1 It is an input bearing part supported inside.

Numeral 11 is a sun gear which is fitted and fixed to the center of one end of the input shaft 9 and which is rotated by the driving force of the motor 2 with the input shaft 9 as a rotation axis, and 12 is meshed with the sun gear 11.
It is a planetary gear composed of a plurality of revolutions around the sun gear 11, and has a hollow hole at the center. In the case of this embodiment,
A total of three planet gears are arranged at the positions of respective vertices of an equilateral triangle centered on the sun gear 11. Reference numeral 13 denotes a rotatable internal gear whose center is the same as that of the sun gear 11 and whose donut-shaped inner peripheral surface meshes with a plurality of planetary gears 12 and includes them. 12
And the internal gear 13 composes the planetary gear mechanism 7.

Numeral 14 is a planetary roller fitted in the central hole from both sides of the planetary gear 12 and having a diameter larger than the diameter of the planetary gear 12 and covering the side portion of the planetary gear 12, the planetary gear 12 and the sun gear. 11 and the internal gear 13 are maintained in engagement relationship.
Reference numeral 15 denotes a planetary shaft that penetrates the center of the planetary gear 12 and the planetary rollers 14 on both sides thereof, and 16 denotes a total of three planetary shafts that respectively penetrate the three planetary gears 12 on both sides of the planetary gear mechanism 7 so as to be freely rotatable. With the combined planet cover, the center of the sun gear 11 rotates in accordance with the revolution of the planet gears.

Reference numeral 17 designates an input shaft 9 fitted to the sun gear 11.
Is an input hole provided in the center of the input shaft 9 so as to penetrate the planet cover 16 on the input shaft 9 side without directly transmitting the rotational movement to the planet cover 16. Reference numeral 18 denotes an output hole provided in the center of the planet cover 16 on the side opposite to the input shaft 9 side,
Reference numeral 19 denotes a brush shaft which is a rotating shaft of the rotating brush 3. One end of the brush shaft projects from the rotating brush 3 and is fitted into the output hole 18, and rotates according to the rotational movement of the planet cover 16 to rotate the rotating brush 3.

Since the center of rotation of the planet cover and the input shaft 9 coincide with each other as described above, the brush shaft 19 also receives the input shaft 9.
It will be located coaxially with. Further, the rotation output of the brush shaft 19 is the rotation output of the planetary gear 12 revolving around, and this is generally the output of the planetary gear. Reference numeral 20 denotes an output bearing portion that supports the brush shaft 19 inside the suction device body 1, and sucks the components from the planetary gear mechanism 7 to the input shaft 9 and the brush shaft 19 by the input bearing portion 10 and the output bearing portion 20 described above. A planetary gear support means for supporting the apparatus main body 1 is configured. And as a result,
The sun gear 11, the planet gears 12, and the inner gear 13 are freely rotatable.

Reference numeral 21 is a drive wheel fixed to the outer periphery of the internal gear 13, and is arranged so that a part of its peripheral surface projects from the lower surface of the suction device 1 by α. The drive wheel 21 and the auxiliary wheel 8 are made of, for example, a rubber-like material. The auxiliary wheel 8 is also provided so as to project from the lower surface of the suction device 1 by α. The operation of the suction device of the electric vacuum cleaner configured as described above will be described with reference to FIGS.

FIG. 3 is a simplified side view of the planetary gear mechanism 7. For the sake of explanation, the sun gear 11 in the drawing is assumed to rotate in the CW direction by the driving force of the motor 2. With the rotation of the sun gear 11 in the CW direction, the plurality of planet gears 12 rotate (rotate) in the CCW direction about each planet shaft 15 as an axis, and rotate (revolve) in the CW direction about the input shaft 9, The planet cover 16 connected to each planet gear 12 rotates in the CW direction. Further, the internal gear 13 rotates in the CCW direction with respect to the rotation of the planet gear 12.

The above relationship is shown in FIG. 4 as a rotational speed characteristic diagram. Here, the rotation speed of the sun gear (11): f = 5000 rpm (C
W direction) Planetary gear mechanism (7) Reduction ratio: N = 5 Drive wheel (21) rotation speed: f / (N-1) Planet gear (12) rotation (revolution) = rotating brush (3) rotation Internal gear ( 13) Rotation = drive wheel (21) rotation will be described.

In FIG. 4, the left side of the vertical axis is the rotation speed of the rotating brush 3,
The right side shows the rotational speeds of the drive wheels 21, and the horizontal axis shows the differential ratio of the two. For example, when the drive wheel 21 is stopped (the differential ratio is zero), the rotation speed of the rotary brush 3 rotates at 1000 rpm in the CW direction due to the relationship of f / N. Conversely, when the rotary brush 3 is stopped, the rotation speed of the drive wheel 21. A rotational speed of 1250 rpm is obtained in the CCW direction due to the relationship of f / (N-1), which is related to the characteristics of the planetary gear mechanism. In a state where neither of them stops, a state in which they rotate in opposite directions due to differential resistance or mass difference is obtained.

In the region shown by the dotted line in FIG. 4, when the drive wheel 21 is rotated in the CW direction from the stopped state, the rotating brush 3 keeps 1000 rpm in the CW rotating direction as shown in the left side of FIG. It is also possible to operate beyond. This is the same when the rotary brush 3 is rotated in the CCW direction, and exhibits the characteristics shown on the right side of FIG.

FIG. 5 is a diagram showing the operating states of the rotary brush 3 and the drive wheels 21 in a specific cleaning operation.
Will be explained on condition that is rotating. First, when the suction device body 1 is lifted, the rotating brush 3
The rotating brush does not rotate, and only the lightweight drive wheel 21 rotates in the CCW direction at 1250 rpm. That is, the operation is performed at the position of the differential ratio shown in FIG. As a result, the rotary brush 3 does not rotate during lifting, which is effective in terms of safety and noise reduction.

Next, when the suction device body 1 is placed on the cleaning surface (landing), the resistance acts in the rotational direction of the drive wheel 21 due to the contact resistance between the drive wheel 21 and the cleaning surface, the self-weight of the suction device body 1, and the like. Then, the drive wheel 21 is rotated at a low speed in the CCW direction to drive the suction device body 1 in the forward direction, or
Alternatively, the rotating brush 3 rotates at a high speed in the CW direction to start the operation of scraping out the dust because it is stopped. That is, the operation is performed at the position of the differential ratio within the range of (B) in FIG. At the same time as landing, the drive wheels 21 have a propulsive force in the forward direction, and the rotary brush 3 automatically starts to rotate at a high speed.

Next, when the suction device body 1 is slid forward, a force in the same direction as the propulsion direction of the drive wheels 21 is applied, and therefore operation near the differential ratio shown in FIG. 4 (C). In this state, that is, the drive wheel 21 rotates at low speed in the CCW direction, and the rotary brush 3 rotates at high speed in the CW direction. As a result, a smooth forward sliding movement of the suction device can be obtained with a light operating force, and since the drive wheel 21 does not slip on the floor surface, cleaning can be performed without damaging the cleaning surface.

Next, when the suction device body 1 is slid backward, a force in the direction opposite to the driving direction of the drive wheels 21 is applied, so that the force in the vicinity of the differential ratio shown in (D) of FIG. In the operating state, that is, the driving wheel 21 is at low speed in the CW direction, the rotating brush 3
Will rotate in the CW direction at a high speed exceeding 1000 rpm. Since the backward sliding motion is the direction in which the suction device body 1 is pulled, it does not require a force in the pushing direction, that is, the vector direction to be pushed against the cleaning surface, so that the user's operating force is small. Therefore, even when a force in the direction opposite to the driving direction of the drive wheel 21 is applied, it can be operated without resistance. Further, since the rotary brush 3 rotates at a high speed in addition to no slip of the drive wheel 21, high dust collecting performance can be obtained without damaging the cleaning surface.

Example 2. Next, another embodiment will be described. 6 and 7 are partial side sectional views showing in detail the planetary gear mechanism and its peripheral mechanism portion in the suction device of the electric vacuum cleaner of the present embodiment. In the drawings, the same components as those of the first embodiment are the same. The reference numerals are given and the description thereof is omitted. Reference numeral 22 denotes an upper surface portion of the suction device body 1 and also the input bearing portion 10
Is provided substantially above and is capable of sliding in the horizontal direction with respect to the input shaft 9. Reference numeral 23 denotes the switching means 22 at three locking points (a), (b) and (c) in the figure. It is a leaf spring for locking to.

Numeral 24 is a stopper which is fixed to the lower part of the switching means 22 and moves integrally. When the switching means 22 is slid to the position (a) in the figure (the state of FIG. 7A), the stopper 24 is a planet. Pressed against the cover 16 to cover the planet cover 16
Disable the rotation of. That is, the output of the planetary gear 12 is restricted, and the rotary brush 3 is locked. A planetary gear lock means is constituted by these mechanisms including the switching means 22 and the stopper 24.

Further, the switching means 22 in the motor stopped state
Slide to the position of (c) in the figure (state of Figure 7 (a))
Then, the stopper 24 press-contacts the brush side pulley 6 and disables the rotation of the brush side pulley 6. That is, the sun gear 11 is locked. The switching means 22 and the stopper 24
The sun gear locking means is constituted by these mechanisms. In this way, the switching means 22 is constructed so that the planetary gear locking means and the sun gear locking means cannot operate simultaneously.

Reference numeral 25 denotes the motor 2 when the sun gear is locked by the switching means 22 (that is, when the sun gear locking means is operating).
Is a switch means for cutting off the power supply to the motor 2 so as not to be driven. When the switching means 22 is locked in the position (c), the stopper 24 comes into contact with the switch 25 to automatically turn off the switch. Is configured. When the switching means 22 is locked at a position other than (c), the stopper 24 does not come into contact with the switch, so the switch is automatically turned on. FIG. 8 is a circuit diagram equivalently showing the switch 24.

The operation of the suction device of the electric vacuum cleaner configured as described above will be described with reference to FIG. As shown in FIG. 7A, when the planetary gear locking means is operated to perform the cleaning operation, an operation mode in which the rotary brush 3 is not desired to rotate can be realized. For example, it is suitable for cleaning the spaces between the plates and the tatami mats that require smooth sliding without requiring strong suction force. Here, when the planetary gear locking means is operating and the motor 2 is in a stopped state, the drive wheel 21 is rotated by the sliding action of the suction device body 1, and the power thereof is transmitted to the sun gear 11 via the rotation of the planetary gear 12. The rotating brush 3 does not rotate.

When the planetary gear locking means is in operation and the motor 2 is in operation, the rotational driving force of the motor 2 is transmitted to the drive wheels 21 via the rotation of the sun gear 11 and the planetary gear 12 to allow automatic traveling. The mode can be realized and the operability is further improved. In the automatic traveling mode, the rotational driving force of the motor 2 is transmitted to the driving wheels 21 without being dispersed by the rotating brush 3. Therefore, the rotational speed control of the motor 2 and the switching control of the rotational direction are controlled to further operate. It improves the sex. According to such a planetary gear lock device, the rotation of the drive wheel 21 is not weighted by the rotary brush 3, so that the rotation of the drive wheel 21 is smooth and the operability is improved.

Next, as shown in FIG. 7A, the motor 20
When the switching means 22 is locked in the position of (c) of FIG. 6 in the state of FF and the sun gear lock means is operated to perform the cleaning operation, the rotation of the drive wheel 21 due to the sliding operation of the suction device body 1 is performed. Thus, an operation mode of rotating the rotary brush 3 can be realized. As for the relationship between the drive wheel 21 and the rotating brush 3 in this operation, they are in the same rotating direction, and when the reduction ratio is N, the rotating brush 3 is N-1 with respect to N rotations of the driving wheel 21. The number of rotations is obtained.

When the switching means 22 is locked at the position shown in FIG. 6C when the motor 2 is driven to rotate, the stopper 24 contacts the switch 25 to automatically turn off the power supply to the motor 2. . For this reason, it is possible to prevent the motor from being locked when it is about to rotate when the sun gear locking means operates. When the switching means 22 is moved from the position (c) in FIG. 6 to the position (a) or (b), the stopper 2 is moved.
4 is separated from the switch 25, and the power supply to the motor 2 is restarted. In this case, when the power supply to the motor 2 is already stopped by another operation switch or the like, the power is not supplied.

In the operation in such a mode, the rotating brush 3 can be rotated without operating the motor 2 and the drive wheel 21 does not slip, so that the dust collecting performance is important and the cleaning surface is protected and silent. Can be realized. Therefore, for example, it is suitable for driving a high-class carpet that does not want to rotate the rotating brush 3 at high speed but wants to reliably remove dust, or driving at midnight when importance is placed on quietness. Further, since the motor 2 is not rotated, energy saving can be achieved.

In the above embodiment, the switching means 22
Although the planetary gear locking means and the sun gear locking means are configured to be selectively operable by means of the above, similar effects can be obtained even if both locking means are operated by separate operating means. By the way, the rotation of the sun gear 11 and the planetary gear 1
If the two revolutions are simultaneously regulated, the planetary gear mechanism will not actually operate. Therefore, if the switching means 22 is arranged so that both locking means can be operated only selectively as in the above-described embodiment, the sun gear can be operated. The rotation of 11 and the revolution of the planetary gear 12 are not restricted at the same time.

Further, by providing the switch 25 for shutting off the power supply to the motor 2 when the sun gear locking means is operated, it is possible to prevent the motor from being locked when the rotation of the sun gear is restricted. In addition, instead of the switch 25,
The sun gear lock means may be operable only when the transmission of the rotational drive of the motor 2 is cut off in advance, or the sun gear lock means may be inoperable when the motor 2 is ON. However, the stable operation of the planetary gear mechanism can be obtained by providing the switch means that cuts off the transmission of the driving force from the motor in cooperation with the sun gear lock means.

[0040]

As described above, according to the present invention, the sun gear which is connected to the motor and rotates in response to the driving force of the motor, and the rotary motion which meshes with the sun gear and revolves around the sun gear are rotationally driven. Since the planetary gear connected to the rotary brush so as to transmit the force to the rotary brush and the drive wheel having the internal gear geared to the sun gear and having the same center of rotation and meshing with the planetary gear on the inner periphery, the rotary brush The number of rotations of the motor can be reduced from the number of rotations of the motor to an appropriate number of rotations, and since the drive wheels do not slip on the cleaning surface, high dust collection performance can be obtained without damaging the cleaning surface. Play.

Further, since the planetary gear lock means for restricting the revolution of the sun gear by the planetary gear is provided, the drive wheel can be rotated without rotating the rotating brush, and a strong suction force can be obtained. The operability on the cleaning side that is not required is improved. Further, since the sun gear lock means for restricting the rotation of the sun gear is provided, the rotary brush rotates according to the rotation of the drive wheels even when the rotation of the motor is stopped. It is possible to obtain the effect that the operation can be reliably performed and the operation that is excellent in the quietness can be performed.

Further, since the switch means for shutting off the rotational drive of the sun gear to the sun gear when the sun gear lock means restricts the rotation of the sun gear, the motor is locked when the sun gear rotation is restricted. The effect of being able to prevent is obtained. Further, since the switching means for selectively activating the planetary gear locking means and the sun gear locking means is provided, it is possible to prevent the planetary gear mechanism from being locked.

[Brief description of drawings]

FIG. 1 is an upper sectional view showing a suction device of a vacuum cleaner according to a first embodiment of the present invention.

FIG. 2 is a partial side sectional view showing a planetary gear mechanism and its peripheral mechanism portion of the suction device of the vacuum cleaner according to the first embodiment of the present invention.

FIG. 3 is a simplified side view of the suction device of the vacuum cleaner according to the first embodiment of the present invention.

FIG. 4 is a rotation speed characteristic diagram of the planetary gear mechanism of the suction device for the vacuum cleaner according to the first embodiment of the present invention.

FIG. 5 is a comparison diagram showing an operating state in a cleaning operation of the rotary brush and the drive wheel of the suction device of the cleaner according to the first embodiment of the present invention.

FIG. 6 is a partial side sectional view showing a planetary gear mechanism and its switching means of a suction device for a vacuum cleaner according to a second embodiment of the present invention.

FIG. 7 is a partial side cross-sectional view showing an operating state of the switching means of the suction device of the vacuum cleaner according to the second embodiment of the present invention.

FIG. 8 is a circuit diagram equivalently showing the inside of the suction device of the vacuum cleaner in the second embodiment of the present invention.

FIG. 9 is a partial side sectional view showing a suction device of a conventional vacuum cleaner.

[Explanation of symbols]

1 suction device body, 2 motor, 3 rotating brush,
6 brush side pulley, 7 planetary gear mechanism, 9 input shaft,
10 input bearing part, 11 sun gear, 12 planetary gear,
13 internal gears, 14 planetary rollers, 15 planetary shafts, 16 planetary covers, 18 output holes, 19 brush shafts, 20 output receiving parts, 21 drive wheels, 22 switching means, 24 stoppers, 25 switches

Claims (5)

[Claims] 1. A suction device for an electric vacuum cleaner, comprising: a rotary brush that comes into contact with a cleaning surface to scrape out dust and the like; and a motor that drives the rotary brush to rotate. A rotating sun gear, a planetary gear that meshes with the sun gear and that is connected to the rotating brush and transmits a rotational motion that revolves around the sun gear to the rotating brush as a rotational driving force, the sun gear and the center of rotation. A suction device for an electric vacuum cleaner, comprising: a drive wheel having the same inner circumference and an internal gear that meshes with the planetary gear. 2. The suction device for an electric vacuum cleaner according to claim 1, further comprising a planetary gear lock unit that can restrict the planetary gear from revolving around the sun gear. 3. A suction port device for an electric vacuum cleaner according to claim 1, further comprising a sun gear lock means capable of restricting rotation of the sun gear. 4. The vacuum cleaner according to claim 3, further comprising switch means for interrupting rotational drive of the motor to the sun gear when the sun gear lock means restricts rotation of the sun gear. Suction device. 5. A suction device for an electric vacuum cleaner, comprising: a rotating brush that comes into contact with a cleaning surface to scrape out dust and the like; and a motor that drives the rotating brush to rotate. The suction device is connected to the motor and is responsive to the driving force of the motor. A rotating sun gear, a planetary gear that meshes with the sun gear and that is connected to the rotating brush and transmits a rotational motion that revolves around the sun gear to the rotating brush as a rotational driving force, the sun gear and the center of rotation. A drive wheel that has the same internal gear that has an internal gear that meshes with the planet gear, an planet gear locking unit that can restrict the planet gear from revolving the sun gear, and a rotation of the sun gear. It is provided with a sun gear locking means that enables the planetary gear locking means and a switching means that selectively enables the planetary gear locking means and the sun gear locking means. Suction device of the gas cleaner.