JP2002115749A - Belt tension adjustment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a belt tension adjustment device capable of preventing a generation of a core deviation of a rotation shaft of an electric motor with legs even if a tension adjustment is carried out by sliding the electric motor on a support base. SOLUTION: A stationary bracket 4 at one end of a belt adjustment tool 1 is fixed to a frame body 10 and an electric motor pressing roller 3 at the other end is contacted with leg parts 12A, 12B. A grasp part 2A is rotated to increase a whole shaft length of the belt adjustment tool 1. Thereby, it is prevented that the electric motor 5 with legs is turned by a tension of a belt 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a belt tension adjusting device used for adjusting a belt tension by sliding a belt-driven electric motor with legs on a support base.

[0002]

2. Description of the Related Art Conventionally, in a legged motor having four legs, a fastening bolt provided in each leg is inserted into four long holes provided in a support base, and a nut is fastened and fixed. . A pulley is provided at one end of the rotary shaft of the motor with legs, and power is transmitted by a belt such as a V-belt attached to the pulley. The tension of the belt is adjusted by loosening the four tightening bolts and then sliding the electric motor with the legs in the tension direction with respect to the support base by using an electric motor push bolt provided on the support base side.

[0003]

However, in a conventional belt tension adjusting device in which a legged electric motor is pushed by using an electric motor push bolt, the belt is hung on one end of a rotating shaft of the legged electric motor. As tension is applied to the belt, one side of the legged electric motor is pulled by the belt, and the rotating shaft of the legged electric motor may be inclined obliquely to cause misalignment.

[0004] It is an object of the present invention to prevent the rotation axis of the legged motor from being out of center even when the tensioned motor is adjusted by sliding the legged motor on the support base. It is to provide a belt tension adjusting device.

[0005]

According to the present invention, in order to attain the above object, a belt-driven electric motor provided on a support base fixed to a floor is slid with respect to the support base. In the belt tension adjusting device for adjusting the tension of the belt, a belt tension adjusting tool for preventing the rotation of the motor with legs due to the tension of the belt when the motor with legs is slid with respect to the support base. Features.

The belt tension adjusting device of the present invention is provided with a belt adjusting tool for preventing the legged motor from rotating due to the belt tension when the legged motor is slid with respect to the support base. Even if the legged motor is slid on the support base for adjustment, it is possible to prevent the rotation axis of the legged motor from being out of alignment.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 shows a belt-driven electric motor 5 with a belt mounted with a belt tension adjusting device according to an embodiment of the present invention.
FIG.

The legged motor 5 has four legs 12A, 1
2B, 12C, and 12D are formed.
Tightening bolts 13A, 13B, 13 provided respectively in 2D
C, 13D are inserted into four long holes 11A, 11B, 11C, 11D formed in the support base 6, respectively, and are tightened with nuts (not shown) to mount the electric motor 5 with legs on the support base 6. Rotary shaft 5A of this electric motor 5 with legs
A first pulley 7 is fixed to one end of the first pulley 7.
Is wound around the belt 8. The belt 8 is wound around a second pulley 9 provided on a rotating shaft of a driven device such as a pump, and the rotational power of the electric motor 5 with legs is transmitted to the driven device via the belt 8. The support base 6 may be fixed directly to the floor or may be fixed to the frame 10.

An upright portion 6A is formed on the support base 6 on the side for adjusting the tension with respect to the belt 8. The upright portion 6A is screwed to the upright portion 6A, and the leading end of the upright portion 6A contacts the electric motor 5 with legs. Two motor push bolts 14, 15 are provided. When the tightening bolts 13A to 13D are loosened and the motor push bolts 14 and 15 are rotated in a predetermined direction, the electric motor 5 with legs is moved right and left along the slots 11A to 11D as shown in FIG. Will be adjusted.

FIG. 1 is a perspective view of a belt tension adjusting device according to an embodiment of the present invention.

The belt tension adjusting tool 1 includes at least a length adjusting bolt 2, an electric motor pressing roller 3, and a fixing bracket 4. As shown in an enlarged view of FIG. 3, the electric motor pressing roller 3 rotatably supports a roller portion 3B on a metal holding member 3A having a U-shaped cross section by a bearing of the holding member 3A. A metal bolt mounting cylinder 3C to which a length adjusting bolt 2 described in detail later is screwed is provided on the base side. The length adjustment bolt 2 has a grip portion 2A made of a nut at the center as shown in an enlarged view of FIG. 4, and a forward thread portion 2B and a reverse thread portion 2C are provided above and below the grip portion 2A. Each is formed.

Further, as shown in FIG. 5 which is an enlarged view, two fastening screws 4B and 4C are screwed into one side 4E of the metal main body 4A having a U-shaped cross section. It has a metal bolt mounting cylinder 4D to which the length adjustment bolt 2 is screwed to the other side 4F of the 4A. The distal ends of the tightening screws 4B and 4C penetrate through one side 4E of the main body 4A so as to be able to come into contact with and separate from the inner surface of the other side 4F. The frame 10 is configured to be sandwiched and held between the distal ends of the 4C.

The height of the fixed bracket 4 held by the frame 10 is the height adjustment bracket 1 made of metal as shown in FIG.
6 can be adjusted. As shown in FIGS. 6 and 7, the height adjustment bracket 16 includes a fitting portion 16A having a U-shaped cross section that fits into the frame body 10 and a fitting portion 16A.
A fastening screw 16B for narrowing the frame body 10 therein and a fitting portion 16
A has an extended portion 16C that extends vertically outward from one edge of A. As shown in FIG. 6, the height adjustment bracket 16 is arranged on the frame 10 such that the extension 16C is located a predetermined distance above the base of the frame 10,
Tighten the fastening screw 16B to fit the tip end thereof to the fitting portion 16A.
The frame body 10 is narrowed and fixed between the inner wall portions. After that, the height adjustment bracket 16 located above the frame 10
Is positioned in the main body 4A of the fixing bracket 4, and the tightening screws 4B and 4C are tightened so that the tip and the other side 4F
The height adjustment bracket 16 is narrowed and fixed between the inner surfaces thereof.

When the frame 10 is made of L steel, a height adjusting bracket 16 is attached as shown in FIG.
When 0 is an H steel material, the height adjustment bracket 16 is attached so that the extension 16C is vertical as shown in FIG. As described above, the fixing bracket 4 can be directly fixed to the frame 10, or the fixing bracket 4 can be fixed to the frame 10 via the height adjustment bracket 16.

The belt adjusting tool 1 has one end of a length adjusting bolt 2 screwed and connected to a bolt mounting cylinder 3C of an electric motor pressing roller 3 and a fixing bracket 4 attached to the other end of the length adjusting bolt 2.
Are screwed together. At this time, the length adjusting bolt 2 rotates the grip portion 2A to shorten the shaft length. Then, as shown in FIGS. 1 and 2, the fixing bracket 4 at one end of the belt adjusting tool 1 is fixed to the frame 10, and the motor pressing roller 3 at the other end is connected to the legs 12A and 12A.
B, and at the same time, the gripping portion 2A is rotated to increase the axial length of the entire belt adjusting tool 1. As a result, the space between the legs 12A and 12B of the electric motor with legs 5 and the frame 10 is mechanically held at a predetermined distance by the belt adjusting tool 1.

The belt adjusting tool 1 can have various configurations in accordance with the frame 10 located near the electric motor 5 with a leg.
It is configured to prevent rotation due to the tension of.
Here, it is assumed that the frame bodies 10 are located on both sides of the electric motor 5 with legs, respectively, and as shown in FIG.
And the motor pressing roller 3 of the belt adjusting tool 1 is brought into contact with the legs 12A and 12B to prevent the legged motor 5 from rotating clockwise in FIG.

For this reason, even if the tightening bolts 13A to 13D are loosened to make the motor 5 with the legs slidable on the support base 6, the tension of the belt 8 is adjusted by rotating the motor push bolts 14 and 15. In addition, the legged motor 5 does not rotate due to the tension of the belt 8, and it is possible to prevent the rotation shaft 5A of the legged motor 5 from being out of center, and it is not necessary to readjust the rotating shaft 5A as in the related art. .

The belt adjusting tool 1 has the motor pressing roller 3 in contact with the legs 12A and 12B.
Even if the electric motor 5 with legs is moved in the direction of adjusting the tension of the belt 8 by rotating the electric motor push bolts 14 and 15, the movement of the electric motor 5 with legs is allowed while the electric motor pressing roller 3 is rotated, and the tension adjustment work is performed. Does not adversely affect Furthermore, various configurations of the belt adjusting tool 1 for preventing the motor with legs 5 from rotating due to the tension of the belt 8 can be considered, but at least one end of the belt adjusting tool 1 is connected to the legs 12A and 12B of the motor 5 with legs. Therefore, the configuration of the belt adjusting tool 1 can be simplified by using the legs 12A and 12B at relatively low positions.

[0020]

As described above, the belt tension adjusting device according to the present invention is provided with the belt adjusting tool for preventing the motor with legs from rotating due to the belt tension. Even if the motor is slid on the support base, it is possible to prevent the rotation shaft of the motor with legs from being out of alignment.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a belt tension adjusting device according to an embodiment of the present invention.

FIG. 2 is a plan view showing the entire belt tension adjusting device shown in FIG. 1;

FIG. 3 is an enlarged perspective view showing a motor pressing roller of the belt tension adjusting device shown in FIG. 1;

FIG. 4 is an enlarged perspective view showing a length adjusting bolt of the belt tension adjusting device shown in FIG. 1;

5 is an enlarged perspective view showing a fixing bracket of the belt tension adjusting device shown in FIG. 1;

FIG. 6 is a sectional view showing a main part of a belt tension adjusting device according to another embodiment of the present invention.

FIG. 7 is an enlarged perspective view showing a height adjusting bracket of the belt tension adjusting device shown in FIG. 6;

FIG. 8 is a front view showing another state of attachment of the height adjustment bracket shown in FIG. 7;

FIG. 9 is a front view showing still another attachment state of the height adjustment bracket shown in FIG. 7;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 belt tension adjusting tool 2 length adjusting bolt 3 motor pressing roller 4 fixing bracket 5 motor with legs 6 support base 7 first pulley 8 belt 9 second pulley 10 frame 11A to 11D long hole 12A to 12D leg 13A to 13D Tightening bolt 14A-14D Motor push bolt 16 Height adjustment bracket

Claims (3)

[Claims] 1. A belt tension adjusting device for adjusting a belt tension by sliding a belt-driven electric motor provided on a support base fixed to a floor surface with respect to the support base. A belt tension adjusting tool for preventing rotation of the electric motor with legs when the arm is slid with respect to the support base. 2. A length adjusting bolt according to claim 1, wherein said belt tension adjusting tool is capable of extending and contracting a longitudinal length by rotating about a longitudinal center line. A motor holding roller provided at one end of the adjusting bolt and abutting on the leg of the motor with a leg, and a fixing bracket provided at the other end of the length adjusting bolt and fixed. Characteristic belt tension adjustment device. 3. The belt tension according to claim 2, wherein the fixing bracket has a height adjusting bracket that can adjust a mounting height of the length adjusting bolt and the electric motor pressing roller. Adjustment device.