JPS60176618A - Power brush - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a power brush for a vacuum cleaner, and more particularly to a small power brush suitable for cleaning carpets.

[Background of the invention]

Conventionally, the suction body of a vacuum cleaner used for cleaning carpets is a full-fledged large power brush in which the rotating brush is driven by a large electric motor, and the rotating brush is driven by an air turbine that is rotated by the suction force of the vacuum cleaner itself. There was an air turbine brush.

For large power brushes, 1. It is large and cannot be used to clean narrow spaces.

2. It is heavy, difficult to handle, and expensive.

3. It does not fit into the parts storage case of a general vacuum cleaner.

There are drawbacks such as.

On the other hand, with air turbine brushes, the suction force of the vacuum cleaner body is used to drive the C rotating brush, so there are many cases where torque is insufficient. This is especially noticeable on carpets with long piles.

2. If the filter of the vacuum cleaner becomes clogged and the landscape becomes less clear, the rotation of the rotating brush will slow down and the scrubbing performance will deteriorate.

There were drawbacks such as.

[Purpose of the invention]

The present invention has been made in view of the above points, and its object is to provide a power brush that is small in size and has excellent handling properties.

[Summary of the invention]

The present invention is a drive source for a rotating brush in a power brush of a vacuum cleaner, and in order to house an electric motor having a cooling fan fixed to its main shaft, a compartment partitioned into a case constituting the outer shell of the power brush is provided. , by providing a number of meters or a plurality of partition plates substantially parallel to the main axis of the electric motor together with a partition wall that partitions this section, and forming a cooling circulation ventilation path through which cooling air for the electric motor etc. by the fan is circulated.
It was designed to achieve the intended purpose.

[Embodiments of the invention]

An embodiment of the power brush according to the present invention will be described below with reference to the drawings.

An embodiment of the present invention is shown in FIGS. 1 to 4.

In the figure, the outer shell of the power brush is composed of a pair of upper case 1 and lower case 2.

Inside the upper case 1 and the lower case 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 general fan 3 and small pulley 8 are fixedly installed at both ends of the main shaft 7 of the electric motor 4, respectively. The power of this electric g II machine 4.

is transmitted to the rotating brush 6 through a power transmission mechanism constituted by the small pulley 8, the timing bell 1-9, the large pulley 5, etc., and the rotation of the rotating brush 6 works to remove dirt from the carpet. It is now possible to do this. Although the power transmission mechanism is configured to reduce speed in order to downsize the drive and its surroundings, it may be configured to speed up. The direction of rotation 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 direction of movement during cleaning.

Reference numeral 10 denotes a bumper, which serves to provide a buffering effect against obstacles and to ensure airtightness of the lower case 2.

11 is a nozzle, 12 is a flow path selection for dirt to the vacuum cleaner body (not shown), a switch and a floor brush 13 appearance]
This is a switching lever that turns on and off. The nozzle 11 is provided with two flow paths 11a, 11)). The floor brush 13 is biased by two push springs j5 so that it is hidden (sunk) inside the lower case 2 when cleaning carpets, and it is hidden (sunk) inside the lower case 2 when cleaning floors or tatami mats. The connecting frame 16 and the cam portion 13a of the floor brush 13 are exposed.

13b, it moves up and down in conjunction with the left and right movement of the switching lever 12. Switch J4 also has a tension spring 17 and an articulating spring 18.
The switching operation is performed by the switching lever 2, and the on/off control is performed in conjunction with the left and right movement of the switching lever 2. That is, in the case of carpet cleaning, when the floor brush 13 is hidden inside the lower case 2, the overnight switch 14 is turned on and the rotary brush 6 rotates, but in the case of floor or fold cleaning, the floor brush 1 is turned on.
3 emerges from the bottom of the lower case 2, the switch 14 is turned off and the rotating brush 6 stops. .

Power is supplied to the electric motor 4 through the cord 20 with a plug whose attachment part to the lower case 2 is protected by the cord 7-719. −・(not shown) is generally connected. Therefore, this plug-equipped cord 20 has a condition that is calculated by adding the length of the hose to the length of the vacuum cleaner extension tube (
2 to 3 rn) in length.

A casing 21 is inserted between the lower cases 1 and 2 so as to be swingable. 22 is gauging 2 after turning
It is rotatably inserted into 1. Reference numeral 23 is a stopper that prevents the casing 21 and the bent 22 from being removed.

When the connecting portion 22a of the bent joint 22 is connected to the extension tube (not shown) of the vacuum cleaner, the casing 21 and the bent joint 22 constitute the main body of the power brush. 2. Lower cases 1, 2, etc. It can move freely by swinging up and down, and swinging left and right.

A roller 25 and an axle 26 are attached to the lower surface of the lower case 2 to ensure runnability on carpets, floors, and folding surfaces.

The rotary brush 6 is provided with a beater 68 and a brush 6b in a single or multiple rifling pattern to effectively beat and loosen the carpet. Further, the rotating brush 6 has bearings 28 on both sides thereof. Bearing 2
Reference numeral 8 denotes a lever that can move vertically (diagonally) in the groove 2a in the lower case 2. 2. The lower case 1.2 is connected to a screw 29 to form a pair of cases.

An electric motor 4 having a fan 3 at one end of a main shaft 7 is surrounded by partition walls 2b and 2c in the lower case 2.

It is stored in a compartment 2e partitioned by 2d. These partition walls 2b are also installed in the upper case 1 that forms a pair with this lower case 2.
, 2c, and 2d, the cooling air from the electric machine 4 whose source is the fan 3 becomes a circulating air as shown by the arrow in Fig. 4. The heat generated by the electric motor 4 can be diffused and radiated by the circulating cooling air. In other words, 21 of the electric motor 4 depending on the presence or absence of the fan 3! The temperature rise value produces a difference of about 20'IC. In order to rectify and circulate this cooling air, I: compartment 2e in case 2.
Inside, a rectifying partition i2f is provided approximately parallel to the main l1lIf17 of the electric motor 4. Since a rectifying partition plate is provided inside the upper case 1 in opposition to this, a more complete passage for the circulating cooling air is created.

The electric motor 4a4 has a bearing part 4a and a housing part 4b.
It is stored and held in the lower cases 1 and 2, and positioning in the direction of the main shaft 7 is performed by a positioning rib 2 protruding low from the lower case 2.
By g.

Electric motor 4 is small! In order to quantify Ill, a permanent magnet field of 4c type is used. A wire-wound commutator motor 4 may be used, but in order to make it small and easy to handle, a permanent magnet field 4 is used.
It is of type c.

Electrical components such as a rectifier 30 for obtaining rectified power for the motor 4, a choke coil 31 for noise prevention, and capacitors 32a and 32b are installed on the side of the cooling fan 3 and on the discharge side of the fan 3. The aim is to reduce the temperature rise of electrical parts. In some cases, it may be effective (to reduce noise) to insert a resistor 33 or a capacitor 34 between the lines, as shown by the broken line in Figure 3, for noise prevention. Similarly, placing it in a cooling circulation ventilation path is effective in reducing temperature rise. It is particularly effective if this resistor 33 is also arranged on the discharge side of the fan 3.

In addition, the partitions 4'12b and 2c described below.

2d, the rectifying partition plate 2f may be provided separately from the lower case 2, but it is preferable to integrally mold the parts in order to keep the components together at a low cost and to ensure accuracy.

In particular, since we want to prevent 1.4 people from ink and small garbage in the compartment 2 where the electric motor 4 is stored, we will manufacture the product with precision using the first method. +,
Of course, a sealing member integrally formed with the bumper 11 may also be provided on the partition walls 2b, 2c, and 2d.

Connect the power brush made of the above to the extension tube of the vacuum cleaner,
They clean carpets, floors, and tatami mats.

22 is connected to the extension tube of the vacuum cleaner, and when the switching lever 12 is turned to the right and the switch 14 is turned on, the rotating brush 6 rotates, and the scraping action of the rotating brush 6 and the suction force of the vacuum cleaner clean the carpet. It can be cleaned.

As described above, according to one embodiment of the present invention, 1. The power brush can be made smaller, so it is possible to provide excellent handling properties.

2. It is possible to provide a power brush that has good rotation and can easily clean even in narrow spaces.

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

,4. Cooling the electric motor! The 41-ring ventilation path is limited to the inside of the case and is blocked off from the dirt passage on the carpet, so dirt does not get into the motor.

It is possible to improve the lifespan and ensure reliability.

5. It is lighter than conventional power brushes that use large electric motors, so it can be driven easily.

In addition, the heavy weight of the /J\ type electric motor allows it to absorb well into the carpet, allowing it to clean the carpet evenly and cleanly.

6. In order to make it the same size as the conventional Coar Turbine brush, a! In the storage case of the remover 1. It is easy to store and is easy to store.

7. Even if the vacuum cleaner body gets clogged, the carpet can be cleaned.1. 4) To improve your memory power with the garbage, clean the carpet 4! I can do it for an extra month.

8. Because it is small and lightweight, it can not only be handled (4 directions) but also be assembled at low cost.

If there is a 1-lux shortage like a 9° air turbine...
death).

10. Kamesuke's defeat J1. Electricity 9iH on the N flow side of I
Because the product was placed on the discharge side of the tube, it was a big 1 of 3 bows! electrical components with lower allowable temperatures can be used.

There are various effects such as

FIG. 5 shows another embodiment of the present invention, in which two rectifying partitions are provided on both sides of the motor 4 in a compartment 2e that accommodates the electric motor 4 in the lower case 2, approximately parallel to the main shaft 7 of the motor 4. tff35
．． 36, which has the same effect as described above. In particular, according to this embodiment, as shown by the arrows, it is possible to obtain a circulating cooling air with a flow that is even more uniform than that of the previous embodiment, and more efficient heat diffusion can be performed, so that the temperature rise can be further suppressed. Can be reduced. Therefore, it is also possible to further downsize the electric motor 4.

〔Effect of the invention〕

As described above, according to the present invention, a cooling circulation ventilation path is formed by providing a rectifying partition plate together with a partition wall in a compartment partitioned in a case to house an electric motor that drives a rotating brush of a power brush. Therefore, we can provide a small, lightweight, and easy-to-handle power brush with excellent cooling efficiency, and its effectiveness is outstanding.

fiij-Q' in between! , 6: Explanation Figure 1 is an exploded perspective view showing one embodiment of the power brush according to the present invention, fJ% 21iQl is a plan view showing the wooden embodiment with the upper case removed, Part 3 is the electric motor Operation) Tl (7'l + Electrical parts circuit 1, 11th
E: is an enlarged plan view of the essential parts of the saw with the bumper removed in FIG. It is.

L...1-1 case, 2...Lower case, :3...Fan, 4...Electric motor, 5-Large pulley, 6...Rotating brush, 7-Main shaft, 8...Small Pulley, 9... to Nyimin Jibel 1, 2b.

2r,, 2d・Shi+, ll wall, 2 t! -F picture, 2
r I J 5 gme 22 3rd mouth 4th 5th ward

Claims (1)

[Claims] 1. A case constituting an outer shell, an electric motor housed in the case, electrical parts for operating the electric motor, a fan fixed to the main shaft of the electric motor, and power transmitted by the electric motor. A power brush for a vacuum cleaner comprising a rotating brush driven via a mechanism, and the electric motor and the fan are housed in a partitioned section in the case, wherein the electric motor and the fan are housed in a partitioned section in the case. A puwa brush characterized in that a partition wall that partitions the compartment and at least one or more rectifying partition plates are provided substantially parallel to the main axis of the electric motor to form a cooling circulation ventilation path by the fan. 2. The power brush according to claim 1, wherein the rectifying partition plate is integrally formed with the case. 3. The power brush according to claim 1, wherein the electric motor is of a permanent magnet field type. 4. The power brush according to claim 1, wherein the electric part for operating the electric motor is disposed on the fan side of the electric motor and on the discharge side of the fan.