KR940000798Y1 - Electromotive sander - Google Patents

Abstract

No content.

Description

Electric sander

(A) of FIG. 1 is a longitudinal cross-sectional view of a part of the head of the electric sander of the present invention, and (b) is a cross-sectional view taken along line A-A 'of (a).

2 is a partial longitudinal side view showing an example of a conventional electric center.

* Explanation of symbols for main parts of the drawings

2,14: Gripping space 3,15: Tofu space

4,16: motor 6,17: drive shaft

7,11: bevel gear 8,21: driven shaft

12,22 Sander 10,27 Synchro Fuuri

28: Synchrobel 29,30: Snow Roller

31: bearing stand for snow roller 32: dustproof wall

The present invention relates to an improvement of a portable electric sander (for example, a sander) used for grinding cemented carbide chips.

Conventionally, this kind of electric sander is made of a synthetic resin case (1), which is connected to the space (2) of the handle portion and the space, and has a head space (3) curved in a right angle direction. The main body 4 of the high speed motor, which has an overload detection element and the like and is stored in the handle part space, is fixed in the case 1 by the fixing frame 5, and is provided at the tip of the drive shaft 6 of the high speed motor. A small bevel gear 7 having a small diameter is fixed, and a driven shaft 8 is supported by bearings 9 and 10 which are stored in the head space and fixed to the case 1, and the driven shaft 8 A bevel gear 11 having a large diameter engaged with the motor side bevel gear 7 is fixed to the base end of the motor, and a sander blade 12 is fixed to the tip of the driven shaft 8.

In the conventional electric sander having the structure as described above, the noise of the gears 7 and 11 is largely engaged, and a high degree of work precision is required to suppress the noise, and the delicate Shenzhen adjustment of the gear mesh of Shenzhen is required. I needed this.

The present invention has devised a technology such as Utility Model Registration Application No. 89 (Pyeong 1) -40058 to remove such a waste.

That is, a motor in which the drive shaft is installed in parallel to the head shaft in the head space, and the shaft is installed in parallel and rotationally with the motor drive shaft, and the driven shaft having the tool fixed to the tip of the motor and the motor It has installed a synchro purifier fixed to a drive shaft, a synchro purifier fixed to the driven shaft, and synchrobels connecting the synchro purifiers.

Due to these, the noise generated from the rotational force transmission unit can be drastically reduced from 80 ° to 60 ° C, thereby dramatically improving the working environment.

In addition, it is easy to manufacture, since the high machining precision of the gear part and the delicate Shenzhen adjustment of the engagement are not necessary. However, compared with the conventional one, the head and the driven part are stored together in the head, so that the head becomes larger and heavier, so that an unsuitable defect remains for a job requiring subtle control.

The present invention is a specific means to solve this problem, in the electric sander having a head space and a head space located in a substantially perpendicular direction to the handle space and the handle space, the drive shaft in the handle space parallel to the handle shaft The installed motor and the head space are located in the head space, and the shaft is installed at right angles to the motor drive shaft and rotates freely, and the driven shaft with the tool fixed to the tip and the sink pusher fixed to the motor drive shaft And a pair of snow rollers that are fixedly connected to the synchrobel which connects to the synchrobel, and which are changed in a substantially perpendicular direction to the synchrovel's driveway.

Referring to the structure of the present invention in detail by the accompanying drawings as follows.

(A) of FIG. 1 is a longitudinal cross-sectional view of a part of the two ends of the transmission center which implemented this invention, (b) is a cross-sectional view along the line A-A 'of (a).

Reference numeral 13 denotes a case, 14 a handle space, and 15 a head space.

In the handle portion space, the motor 16 and its drive shaft 17 are installed in parallel with the handle shaft.

Reference numeral 18 is a fixing frame.

The drive shaft 17 is provided with a cooling fan 19 and a sink puri 20 having a smaller diameter.

Numeral 21 denotes a driven shaft whose shaft is installed at a substantially right angle to the motor 17 in the two-end space and is rotatably fixed thereto, and the polishing tool 22 is fixed to its tip.

Reference numerals 23 and 24 are bearings fixed to the molds 25 and 26.

The head of the driven shaft 21 is fixed with a large diameter pururi 27.

The synchro belt 28 is tightened between the synchro pururies 20 and 27. A pair of snow rollers 29 and 30 are provided in the traveling path of the synchrobel belt 28 to change the running direction of the belt in a right angle direction.

Reference numeral 31 denotes a bearing stand of these play rollers 29 and 30.

Reference numeral 32 denotes a dustproof wall which is provided such that grinding powder or dust does not fly into the motor.

The action effect is described in detail as follows.

Electric sander of the present invention configured as described above is transferred to the driven shaft which is located in a substantially perpendicular direction through the belt-sulfur roller (29, 30) to the power of the electric motor can achieve various practical effects as follows.

In other words, noise can be greatly reduced during operation, and the head can be made smaller and lighter than the prior art or the original design. There is an advantage to that.

In addition, the present invention sander (abrasive) is the number of W as compared to the conventional one, as the rotational force of the motor is directly transmitted to the driven shaft 21 efficiently by the synchro pururi (20) (27) and the synchrobel (28) Since a small motor can be used, manufacturing cost can be reduced. In addition, the present invention also provides a free shift in which the actual distance is fixed with respect to the change in the reduction ratio, whereas in other gear shifts, it is difficult to reduce the speed within the sum of the radius of the motor and the driven bearing radius. In other words, if the other side of the gear diameter is enlarged, the case size increases by its neck. However, the sander of the present invention uses a belt, so that the distance between the puuriers can be freely reduced and arranged.

In the above-described structure of the present invention, the handle part space axis and the head space axis are almost perpendicular to each other, but even if this is somewhat acute, the same effect can be obtained. In addition, in the above structure, the snow rollers 29 and 30 are located below the sinker pusher 20 of the motor, but the upper rollers 27 are fixed to the upper part of the driven shaft 21 by positioning them above. It is okay.

Claims (1)

In the electric sander (grinding machine) 22 having a handrail space 14 and a head space 15 which is located in a direction substantially perpendicular to the handrail space, the drive shaft 17 in the handle space 14. ) Is positioned in the motor 16 and the head space 15 installed in parallel with the handle shaft, and the shaft is substantially perpendicular to the drive shaft 17 of the motor 16 and rotates freely. The follower shaft 21 is installed and the tip of the tool is fixed to the sinker pusher 20 fixed to the motor drive shaft 17 and the sinker pusher 27 fixed to the follower shaft and these sinks A pair of snow rollers connected to the synchro belt 28 and the synchro belt 28 are connected to each other to fix the driving path of the synchro belt 28 at right angles. 29) Electric sander equipped with.