JPH0790003B2 - Power brush - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power brush, and more particularly to a power brush suitable for cooling an electric motor for driving a rotating brush and electric parts related to the electric motor.

[Conventional technology]

The power brush used for cleaning the carpet was configured to drive a rotating brush with an electric motor to scrape out dust and suck it into the cleaner body. Since this power brush uses an electric motor to drive the rotating brush, it becomes necessary to cool the electric motor. As a method for cooling an electric motor, as described in Japanese Utility Model Laid-Open No. 56-82942, a cooling fan is built into the electric motor, and exhaust air of the electric motor is exhausted into an intake chamber through an exhaust passage. It was

[Problems to be Solved by the Invention]

However, in the technique described in Japanese Utility Model Laid-Open No. 56-82942, since the suction chamber and the electric motor are connected via the exhaust path, the cleaner is operated in a state where the electric motor for driving the rotary brush is not operated. In this case, there is a problem that dust invades the electric motor through the exhaust path and causes a failure.

Further, in the technique described in Japanese Utility Model Laid-Open No. 56-82942, no consideration has been given to cooling the electric parts of the electric motor.

An object of the present invention is to solve the above problems and to provide a power brush suitable for preventing dust from entering an electric motor and electric parts of the electric motor and cooling them.

[Means for Solving the Invention]

In order to achieve the above object, a feature of the present invention is that a partition wall that forms a rectangular space in which the electric motor is housed by using the inner wall of the case of the suction body, and the partition wall is formed. A rectifying partition plate disposed apart from the outer periphery of the electric motor is provided inside the space, the rectifying partition plate is arranged along the rotation axis direction of the electric motor, and both tip ends in the longitudinal direction are It is arranged so as to be separated from the partition wall, and is formed by the motor side ventilation passage formed by the motor side surface of the rectification partition plate and the case inner wall, and the non-motor side surface of the rectification partition plate and the partition wall. A cooling circulation air passage is formed by the outer ventilation passage, and an electric component such as a condenser is arranged in the cooling circulation air passage.

[Action]

According to the present invention, the partition wall and the rectifying partition plate form the cooling circulation air passage, and the electric components such as the electric motor and the condenser are arranged in the cooling circulation air passage, so that the electric motor and the condenser are disposed. It is possible to prevent dust from entering the electric parts and to effectively cool them.

〔Example〕

Embodiments of the power brush according to the present invention will be described with reference to the drawings.

Here, FIG. 1 is an exploded perspective view of a power brush according to an embodiment of the present invention, FIG. 2 is a plan view of the power brush with its upper case removed, and FIG. The figure is
FIG. 2 is an enlarged view of an essential part without the bumper shown in FIG. 2, and FIG. 5 is an enlarged view of an essential part without the bumper according to another embodiment.

First, in FIGS. 1 to 4, reference numerals 1 and 2 are a pair of upper and lower cases forming an outer shell.

Inside the upper and lower cases 1 and 2, parts such as an electric motor 4 having a fan 3 and a rotating brush 6 having a large pulley 5 are housed.

The fan 3 is attached to one side of the main shaft 7 extending to both ends of the electric motor 4, and the small pulley 8 is attached to the other side thereof.

The power of the electric motor 4 is transmitted to the rotary brush 6 by a power transmission mechanism composed of a small pulley 8, a timing belt 9, a large pulley 5, etc., so that dirt on the carpet can be removed. A small pulley 8 is attached to the electric motor 4, and a large pulley 5 is attached to the rotating brush 6 to reduce the speed. However, it is not necessary to limit this relationship, and even a speed-up relationship can be summarized as a product having a scraping action.

The rotation direction of the electric motor 4 is counterclockwise when viewed from the small pulley 8 side so that the rotating brush 6 rotates in accordance with the traveling direction during cleaning.

A bumper 10 serves to secure a buffering effect against obstacles and an airtight effect of the upper and lower cases 1 and 2.

Reference numeral 11 is a nozzle, and 12 is a switching lever for selecting a flow path of dust to a cleaner body (not shown), withdrawing and retracting the floor brush 13 and turning the switch 14 on and off.

The nozzle 11 is provided with two flow paths 11a and 11b. The floor brush 13 is biased by two push springs 15 so as to hide (immerse) the lower case 2 in the case of carpet cleaning, and below the lower case 2 in the case of floor or fold cleaning. The connecting rod 16 and the cam portions 13a and 13b of the floor brush 13 move up and down in conjunction with the left and right movements of the switching lever 12 as shown in FIG. The switch 14 is also operated by the pulling spring 17 and the nodal spring 18 to perform the nodal operation, and the on / off control is performed in conjunction with the left / right movement of the switching lever 12.

That is, in the case of carpet cleaning, the floor brush 13 covers the lower case 2, the switch 14 is turned on, and the rotary brush 6 rotates, but in the case of floor or fold cleaning,
The floor brush 13 comes out to the lower part of the lower case 2, the switch 14 is turned off, and the rotary brush 6 is stopped.

Although the switch 14 is related to a lever-type switch, it can be a non-lever-type switch including a lever structure that operates the switch.

Power is supplied to the electric motor 4 by means of a cord 20 with a plug, whose attachment portion to the lower case 2 is protected by a cord armor 19.

It is common to connect the cord with plug 20 to a power brush outlet (not shown) of the cleaner body.
Therefore, the cord 20 with a plug is of a length (2 to 3 m) in which the length of the hose is added to the length of the extension pipe of the vacuum cleaner.

Reference numeral 21 denotes a casing, which is swingably inserted between the upper and lower cases 1 and 2. Reference numeral 22 denotes a bent portion, which is rotatably inserted into the casing 21. 23 bends with casing 21
It is a swimper that prevents it from coming off with 22. Turn around 22
When the connecting portion 22a of the power brush is connected to the extension pipe (not shown) of the vacuum cleaner, the casing 21 and the bending piece 22 constitute the main body of the power brush, and the upper and lower cases 1 and 2 are shaken up and down. It can move freely and can swing freely to the left and right.

A roller having a roller shaft 24 on the lower surface of the lower case 2.
A wheel 27 having an axle 25 and an axle 26 is attached, and is configured so as to ensure the traveling performance on a carpet, a floor or a scissors.

The rotary brush 6 described above includes a Peter 6a and a brush 6b.
It is provided in a spiral shape in one or multiple threads, and it is effective in tapping and loosening the carpet, and scraping. Further, the rotary brush 6 has bearings 28 on both sides thereof. The bearing 28 can move the groove 2a in the lower case 2 up and down (obliquely).

The upper and lower cases 1 and 2 form a pair of cases by screws 29. Next, a storage-related configuration of the electric motor 4 in the above configuration will be described. The electric motor 4 having the fan 3 at one end of the main shaft 7 is housed in the lower case 2 in one compartment 2e separated by partition walls 2b, 2c, 2d.

The upper case 1 forming a pair with the lower case 2 is also provided with a partition wall facing the partition walls 2b, 2c, 2d, so that the cooling wind of the electric motor 4 using the fan 3 as a source is Circulating air as indicated by an arrow in FIG. 4 is generated. With this circulating cooling air, the heat generated by the electric motor 4 is dissipated and radiated, and can be effectively cooled.

That is, the temperature rise value of the electric motor 4 depending on the presence or absence of the fan 3 causes a difference of about 20 ° C.

In order to rectify and circulate the cooling air, a rectifying partition plate 2f is provided in one compartment 2e in the lower case 2 substantially parallel to the main shaft 7 of the electric motor 4. Since the rectifying partition plate is also provided in the upper case 1 so as to face the rectifying partition plate, the circulatory cooling air passage is provided in a more complete form, and the cooling effect is further enhanced.

As shown in FIG. 4, the electric motor 4 is housed and held in the upper and lower cases 1 and 2 by the bearing portion 4a and the housing portion 4b. It depends on the positioning rib 2g.

The electric motor 4 has a permanent magnet field to reduce its size and weight.
There is a 4c type. A wound commutator motor may be used, but a permanent magnet field 4c is used to make it small and easy to handle.
It is a type equipped with.

As shown in FIG. 3, the electric motor 4 has a rectifier 30 for obtaining a rectified power source of the electric motor 4, a noise-preventing choke coil 31, and a condenser on the cooling fan 3 side and the discharge side of the fan 3.
Electrical components such as 32a and 32b are arranged to reduce the temperature rise of these electrical components. For noise prevention,
In some cases, it may be effective to insert the resistor 33 as shown by the alternate long and short dash line in FIG. 3 and the capacitor 34 between the lines (noise can be reduced). Arranging in the ventilation passage is effective in reducing the temperature rise. It is particularly effective if this resistor 33 is also arranged on the discharge side of the fan 3.

In addition, the partition walls 2b, 2c, 2d and the rectifying partition plate 2f described above.
May be provided separately from the lower case 2, but it is desirable to integrally form the parts in order to combine them at low cost and to secure dimensional accuracy. In particular, the compartment in which the electric motor 4 is stored
Since it is desired to prevent the entry of small dust into the inside of 2e, it is important to manufacture with high dimensional accuracy.

These partition walls 2b, 2c, 2d and straightening partition plate 2f also have bumpers.
Of course, a seal member integrally formed with 11 may be provided.

Connect the power brush consisting of the above to the extension tube of the vacuum cleaner,
Cleaning on the rug, floor and folds.

That is, when the extension tube of the vacuum cleaner is bent to connect 22 and the switch lever 12 is set to the right side and the switch 14 is turned on, the rotary brush 6 is rotated, and the carpet is scraped by the rotary brush 6 and the suction force of the vacuum cleaner. The one above can be cleaned.

According to the design example of the power brush according to the present embodiment described above, the size thereof is front and rear (length) 135 mm, left and right (width) 31
It could be 0 mm and 57 mm in height.

Moreover, the weight could be set to 0.65 kg.

This is a reduction of 44% in volume and 36% in weight compared to the conventional example.
It has become possible to reduce to%.

As described above, according to one embodiment of the present invention, in summary, the following various effects can be expected.

(1). Since the power brush can be downsized, it can be provided with excellent handleability.

(2). We can provide a power brush that has a sharp rotation and can be easily cleaned even in a narrow space.

(3). Since the electric motor can be cooled efficiently, it is possible to provide a small, lightweight, and easy-to-handle power brush.

(4). The cooling and ventilation passage of the electric motor is limited to the inside of the case, and since it is blocked against the dirt scraping path on the carpet, there is no intrusion of dirt into the electric motor. It is possible to improve life and secure reliability.

(5). It is lighter than a conventional power brush that uses a large electric motor, so it can be run lightly. In addition, the moderate weight of the small electric motor makes it possible to obtain good adhesion to the carpet. It can clean the carpet evenly.

(6). Since it has the same size as a conventional air turbine brush, it can be placed in the storage case of a conventional general-purpose vacuum cleaner and has excellent storage properties.

(7). Even if the vacuum cleaner becomes clogged, the rug on the carpet can be strongly scraped by the electric motor, so you can clean the carpet cleanly.

(8). Since it is compact and lightweight, it not only improves handling but also can be inexpensive.

(9). The torque does not become insufficient like the air turbine.

(Ten). Since the electric components such as the rectifier for operating the motor are installed on the discharge side of the fan, the temperature rise can be significantly reduced. It is possible to use electric (child) parts with low allowable temperature.

(11). Since the electric motor is arranged on one of both sides of the case, and the switch and the switching lever are arranged on the other side, respectively, (a). The weight in the case can be balanced, and the operability and usability can be improved, and (b). The volume in the case can be effectively used, and the size can be reduced, and at the same time, the operability can be improved.

Next, FIG. 5 is an enlarged view of the essential parts of the other embodiment, but without the bumper, as described above.

In FIG. 5, the same reference numerals as those in FIG. 4 above indicate the same parts, and 35 and 36 indicate the flow regulating partition plates.

That is, as shown in FIG. 5, if two rectifying partition plates 35 and 36 are provided in one section 2e of the lower case 2, the same effect as in the case of the above-described embodiment can be exhibited. In addition to the above, the following effects peculiar to the present embodiment are exhibited.

In the case of the present embodiment, the circulating cooling air shown by the arrows arranged more than in the above-described embodiments can be obtained, and more efficient heat diffusion can be performed, so that the temperature rise can be reduced. And
It is possible to use a smaller electric motor.

〔The invention's effect〕

As described above, according to the present invention, the cooling circulation ventilation passage is formed by the partition wall and the rectifying partition plate, and the electric components such as the electric motor and the condenser are arranged in the cooling circulation ventilation passage. Therefore, it is possible to prevent dust from entering the electric parts such as the electric motor and the condenser, and to effectively cool them.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a power brush according to an embodiment of the present invention, FIG. 2 is a plan view of the power brush with its upper case removed, FIG. 3 is its circuit configuration diagram, and FIG. FIG. 2 is an enlarged view of an essential part of the vehicle with the bumper removed in FIG. 2, and FIG. 5 is an enlarged view of an essential part of the vehicle with the bumper removed according to another embodiment. 1 …… Upper case, 2 …… Lower case, 2a …… Groove, 2b, 2c,
2d …… partition wall, 2e …… compartment, 2f …… rectifying partition, 2g ……
Positioning rib, 3 ... Fan, 4 ... Electric motor, 4 ...
Bearing part, 4b ... Housing part, 5 ... Large pulley, 6 ...
… Rotating brush, 6a …… Peter, 6b …… Brush, 7 …… Spindle, 8 …… Small pulley, 9 …… Timing belt, 10…
… Bumper, 11 …… Nozzle, 11a, 11b …… Flow path, 12 ……
Switch lever, 13 …… Floor brush, 13a, 13b …… Cam part, 14
...... Switch, 15 …… Pressing spring, 16 …… Connecting rod, 17 ……
Pulling spring, 18 ...... node spring, 21 …… Casing, 22 ……
After bending, 22a ... connector, 23 ... stopper, 24 ...
… Roller shaft, 25 …… Roller, 28 …… Bearing, 30 …… Rectifier, 31 …… Noise prevention choke coil, 32a, 32b, 34…
… Condenser, 33 …… Resistance, 35,36 …… Rectifying partition plate.

Claims (1)

[Claims] 1. A case constituting an outer shell, an electric motor housed in the case, a cooling fan provided on the same axis as a rotating shaft of the electric motor, a power transmission mechanism driven by the electric motor, A power brush configured by a rotating brush driven by a power transmission mechanism, comprising: a partition wall that forms a rectangular space in which the electric motor is housed by using an inner wall of the case; and a partition wall formed by the partition wall. A rectifying partition plate is provided inside the space so as to be spaced apart from the outer periphery of the electric motor. The rectifying partition plate is arranged along the rotational axis direction of the electric motor, and both end portions in the longitudinal direction are the above-mentioned. It is arranged apart from the partition wall, and is formed by the motor side ventilation passage formed by the surface of the rectification partition plate on the electric motor side and the inner wall of the case, and by the surface of the rectification partition plate that is not on the electric motor side and the partition wall. Power brush by an outer air passage constitutes the cooling circulation air passage, characterized in that arranged the electrical components such as capacitors to the cooling circulation air passage to be.