JP2005195079A - Belt tension adjusting device for motor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a belt tension adjusting device for a motor, in which axial deflection of a rotation shaft of the motor can be prevented when belt tension is adjusted. <P>SOLUTION: This device is for adjusting the tension of a belt 9 driven by a legged motor 1 installed on a support base 4 to be slidable in a prescribed direction. Pushing bolts 13 and 14 are provided to push the legged motor 1 when the tension of the belt 9 is adjusted. A guide means 17 is provided to guide the legged motor 1 in the prescribed direction. The guide means 17 includes a through bolt 19 and nuts 20, 20a, 20b, and 20c to connect a pair of L-brackets 18 and 18a disposed to hold the legged motor 1 between them, and fixing bolts 21 and 21a to fix the L-brackets 18 and 18a to the support base 4. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a belt tension adjusting device for an electric motor that adjusts the tension of a belt driven by an electric motor such as a legged electric motor incorporated in a hydraulic unit of a hydraulic elevator.

  As this type of prior art, there has been proposed one that adjusts the tension of a belt that is attached to a support base and driven by a legged motor that can slide in a predetermined direction. In the electric motor according to this prior art, four tightening bolts inserted through holes formed in the four legs of the electric motor are inserted into four elongated holes extending along a predetermined direction of the support base. Then, it is fixed to the support base by tightening these tightening bolts. The prior art also includes a push bolt that presses the electric motor in the predetermined direction when the tightening bolt is loosened when adjusting the belt tension.

In this prior art, when adjusting the tension of the belt, with the four tightening bolts loosened, the motor is pressed by the push bolt and slid in a predetermined direction, and the tension of the belt driven by this motor When the value reaches the specified value, the fastening bolt is tightened to fix the electric motor to the support base again (for example, refer to Patent Document 1).
JP-A-11-136903 (paragraph numbers 0002, 0008, 0009, FIG. 1)

  In the above-described prior art, when the motor is pressed with a push bolt when adjusting the tension of the belt, the motor tends to be pulled toward the belt as tension is applied to the belt. There was a problem that tilted easily.

  When such a rotational axis misalignment occurs, the belt tension adjustment work must be repeated until the center misalignment is eliminated. The efficiency is reduced. In addition, when such misalignment of the rotating shaft of the electric motor occurs, it is necessary to correct the position of the electric motor in a direction orthogonal to the sliding direction of the electric motor. Since this is a complicated work that tends to be unstable, it is not always sufficient from the viewpoint of work safety.

  The present invention has been made from the above-described prior art, and an object of the present invention is to provide a belt tension adjusting device for an electric motor that can prevent misalignment of the rotating shaft of the electric motor during belt tension adjustment. is there.

  In order to achieve the above object, the present invention adjusts the tension of a belt driven by an electric motor that is attached to a support base and is slidable in a predetermined direction. An apparatus for adjusting a belt tension of an electric motor including a push bolt that presses in a direction includes a guide unit that guides the electric motor in the predetermined direction.

  In the present invention configured as described above, when the electric motor is pressed with a push bolt when adjusting the tension of the belt, the electric motor is guided in a predetermined direction by the guide means, so that the inclination of the rotating shaft of the electric motor does not occur. Thereby, misalignment of the rotating shaft of the electric motor can be prevented.

  Further, the present invention is the above invention, wherein the electric motor comprises a legged electric motor that is fastened to the support base with a tightening bolt, and is formed in the support base and has a long hole that extends along the predetermined direction. The legged electric motor is slidable in the predetermined direction in a state where the tightening bolt is inserted.

  Further, the present invention is characterized in that, in the above invention, the guide means comprises a bracket that can be attached to and detached from the support base.

  Further, the present invention is characterized in that, in the above invention, the bracket comprises a pair of L-shaped brackets arranged so as to sandwich the electric motor.

  Also, in the present invention according to the above invention, the guide means includes a through bolt that connects the pair of L-shaped brackets, and a fixing bolt that fixes each of the pair of L-shaped brackets to the support base. It is a feature.

  The present invention can prevent misalignment of the rotating shaft of the electric motor during belt tension adjustment, thereby simplifying the belt tension adjustment work and improving the efficiency of the belt tension adjustment work as compared with the prior art. . In addition, since it does not require complicated adjustment to the inclination of the rotating shaft of the motor in the direction orthogonal to the sliding direction of the motor, this belt tension adjustment does not cause an unstable posture of the worker during work. Excellent safety in work can be ensured.

  The best mode for carrying out the belt tension adjusting device for an electric motor according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a plan view showing an embodiment of the present invention. An electric motor targeted by the present embodiment is a legged electric motor 1 provided in, for example, a hydraulic unit of a hydraulic elevator, and a first pulley 3 is attached to the rotary shaft 2 thereof. A support base 4 that supports the legged motor 1 is fixed to a frame 5 of the hydraulic unit. A pump 6 is fixed to the frame body 5, and a second pulley 8 is attached to a rotating shaft 7 of the pump 6. A belt 9 as a tension adjustment target is wound around the first pulley 3 and the second pulley 8.

  The above-described support base 4 is formed with four long holes 10, 10a, 10b, and 10c for attaching the legged motor 1 so as to be slidable in a predetermined direction. These long holes 10, 10a, 10b, and 10c are extended along a predetermined direction. Clamping bolts 12, 12 a, 12 b, 12 c for fixing the leg motor 1 to the support base 4 are inserted into holes formed in the legs 11, 11 a, 11 b, 11 c of the leg motor 1. These fastening bolts 12, 12a, 12b, 12c are inserted into the long holes 10, 10a, 10b, 10c, respectively, and then fastened with fasteners (not shown), whereby the legs 11, 11a, 11b of the legged electric motor 1 are secured. , 11 c are fixed to the support base 4.

  On one end side 4a of the support base 4, when the tension of the belt 9 is adjusted, two push bolts 13 that press the legged motor 1 in the predetermined direction described above, that is, the extending direction of the long holes 10, 10a, 10b, 10c, 14 is deployed. That is, by loosening the lock nuts 15 and 16, it is possible to slide the legged motor 1 by pressing the push bolts 13 and 14.

  On the other end side 4 b of the support base 4, guide means 17 for guiding the legged motor 1 in the predetermined direction described above is arranged. The guide means 17 includes, for example, a bracket that can be attached to and detached from the support base 4. This bracket is composed of a pair of L-shaped brackets 18 and 18a arranged so as to sandwich both side surfaces of the legged motor 1 for example. The guide means 17 includes a through bolt 19 for connecting the pair of L-shaped brackets 18 and 18a, nuts 20 and 20a for fixing the through bolt 19 to the L-shaped bracket 18, and a nut 20b for fixing the L-shaped bracket 18a. , 20c, a fixing bolt 21 for fixing the L-shaped bracket 18 to the support base 4, and a fixing bolt 21a for fixing the L-shaped bracket 18a to the support base 4.

  The tension adjusting operation of the belt 9 according to the present embodiment is performed as follows. That is, for example, as shown in FIG. 1, L-shaped brackets 18, 18 a are arranged so as to sandwich both side surfaces of the legged motor 1, and fixing bolts 21 are long through holes formed in the L-shaped bracket 18. The fixing bolt 21a is inserted into the long hole 10c through the hole formed in the L-shaped bracket 18a, and nuts are screwed into the fixing bolts 21 and 21a to be fastened. As a result, the L-shaped brackets 18 and 18 a are fixed to the support base 4.

  Next, the through bolt 19 is inserted into the connecting hole formed in each of the L-shaped brackets 18, 18 a, and the through bolt 19 is screwed into the L-shaped brackets 18, 18 a by the nuts 20, 20 a, 20 b, 20 c that are screwed into the through bolt 18. Secure to.

  Next, the four tightening bolts 12, 12a, 12b, and 12c are loosened so that the legged motor 1 is slidable in a predetermined direction.

  Next, the lock nuts 15 and 16 fixing the push bolts 13 and 14 are loosened, and the push bolts 13 and 14 are rotated by a spanner. As a result, the legged motor 1 moves in a predetermined direction, that is, in the right direction in FIG. 1, and tension is applied to the belt 9 via the first pulley 3.

  When the tension applied to the belt 9 reaches a specified value, the tightening bolts 12, 12a, 12b, and 12c are tightened. As a result, the legs 11, 11 a, 11 b, 11 c of the legged electric motor 1 are fixed to the support base 4.

  Next, the lock nuts 15 and 16 are tightened to fix the push bolts 13 and 14. Finally, the fixing bolts 21 and 21 a are loosened, and the guide means 17 including the L-shaped brackets 18 and 18 a and the through bolt 19 is removed from the support base 4.

  According to the present embodiment configured as described above, when the legged motor 1 is pressed by the push bolts 13 and 14 when the tension of the belt 9 is adjusted, the legged motor 1 is linearly guided in a predetermined direction by the guide means 17. Since it is guided, the rotation shaft 2 of the legged motor 1 is not inclined. As a result, misalignment of the rotating shaft 2 of the legged electric motor 1 can be prevented, the tension adjustment work of the belt 9 can be simplified, and the efficiency of the belt tension adjustment work can be improved. Further, since no complicated adjustment is required for the inclination of the rotating shaft 2 of the legged motor 1 in the direction orthogonal to the sliding direction of the legged motor 1, an unstable posture of the worker who is working is generated. Therefore, excellent safety in this belt tension adjustment work can be ensured.

It is a top view which shows one Embodiment of the belt tension adjusting device of the electric motor which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Electric motor 2 Rotating shaft 3 1st pulley 4 Support base 5 Frame 6 Pump 7 Rotating shaft 8 2nd pulley 9 Belt 10, 10a, 10b, 10b Long hole 11, 11a, 11b, 11c Leg 12, 12a, 12b, 12c Tightening bolt 13, 14 Push bolt 15, 16 Lock nut 17 Guide means 18, 18a L-shaped bracket 19 Through bolt 20, 20a, 20b, 20c Nut 21, 21a Fixing bolt

Claims (5)

Adjusting the tension of a belt that is attached to a support base and driven by an electric motor that is slidable in a predetermined direction;
In the belt tension adjusting device for an electric motor provided with a push bolt that presses the electric motor in the predetermined direction when adjusting the tension of the belt,
A belt tension adjusting device for an electric motor, comprising guide means for guiding the electric motor in the predetermined direction. In the invention of claim 1,
The electric motor comprises a legged electric motor that is fastened to the support base with a fastening bolt,
An electric motor characterized in that the legged motor is slidable in the predetermined direction in a state where the tightening bolt is inserted into a long hole formed in the support base and extending along the predetermined direction. Belt tension adjuster. In the invention according to claim 1 or 2,
The belt tension adjusting device for an electric motor, wherein the guide means comprises a bracket that can be attached to and detached from the support base. In the invention of claim 3,
A belt tension adjusting device for an electric motor, wherein the bracket comprises a pair of L-shaped brackets arranged so as to sandwich the electric motor. In the invention of claim 4,
The belt tension adjusting device for an electric motor, wherein the guide means includes a through bolt that connects the pair of L-shaped brackets, and a fixing bolt that fixes each of the pair of L-shaped brackets to the support base. .

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