JPH1179358A - Roller with built-in motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roller with a built-in motor which reduces operation sound and is very quiet. SOLUTION: A roller with a built-in motor 1 is constituted in such a way that a motor 3 and reduction gears 5 are built in a roller main body 2 and the inside of the roller main body 2 is divided into a motor part A and a reduction gear part B as shown in the drawing. A cylindrical body 6 is built in the roller main body 2, and the inside of the roller main body 2 has a double structure. The motor 3 and the reduction gears 5 are covered with the cylindrical body 6 so as to prevent a leakage of noise to the outside of the roller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor built-in roller in which a motor and a speed reducer are built in a roller body.

[0002]

2. Description of the Related Art As a driving roller of a roller conveyor or a driving pulley of a belt conveyor, a motor built-in roller having a motor and a reduction gear built in a roller body is widely known (Japanese Utility Model Laid-Open No. 6-56026 and others). Rollers with built-in motor
The rotational force of the built-in motor is reduced by the speed reducer and transmitted to the roller body, and the roller body itself rotates at the reduced rotation speed.

[0003]

In recent years, interest in the working environment has been increasing, and a roller with a built-in motor having higher quietness has been demanded. That is, the roller with a built-in motor is not a device that emits a loud noise, but further silence is required.

SUMMARY OF THE INVENTION It is an object of the present invention to improve a roller with a built-in motor of the prior art, and to provide a roller with a built-in motor that has low running noise and high silence.

[0005]

According to the first aspect of the present invention, a motor and a speed reducer are incorporated in a roller body, and the rotational force of the motor is reduced by the speed reducer. In the roller with a built-in motor, in which the roller body rotates, a cylindrical body separate from the roller body is built in the roller body, and the cylindrical body covers part or all of the motor and the speed reducer. A roller with a built-in motor. The motor and the speed reducer may be separate ones, or may be one integrated like a geared motor.

In the roller with a built-in motor according to the present invention, a tubular body is built in the roller body, and the tubular body covers a part or all of the motor and the speed reducer. Therefore, noise generated by the motor and the speed reducer is cut off by the cylindrical body, and the sound leakage to the outside of the cylindrical body is small. Further, since the roller with a built-in motor according to the present invention has a roller body as in the prior art, noise is also blocked by the roller body and hardly leaks to the outside.

According to a second aspect of the present invention which is an improvement of the above aspect, a buffer member is interposed between the roller body and the speed reducer, and the rotational force is transmitted via the buffer member. A roller with a built-in motor according to claim 2.

[0008] The present invention provides a method in which between a roller body and a speed reducer,
The transmission of noise is interrupted by interposing a buffer member. That is, the sound generated from the motor or the speed reducer is transmitted to the roller body by the contact of the shaft or the gear, and leaks to the outside when the roller body vibrates minutely. Therefore, in the present invention, a buffer member is interposed between the roller main body and the speed reducer to cut off the transmission of sound to enhance silence.

According to a third aspect of the present invention, there is further provided a fixed shaft communicating inside and outside, and the cylindrical body is attached to the fixed shaft via a buffer member. The motor built-in roller according to claim 1 or 2.

The roller with a built-in motor according to the present invention comprises:
Since the cylindrical member is attached to the fixed shaft via the buffer member, the vibration of the cylindrical body is not transmitted to the fixed shaft, and the noise leaking to the outside is small.

[0011]

Embodiments of the present invention will be described below. FIG. 1 is a sectional view of a roller with a built-in motor according to a specific embodiment of the present invention. FIG. 2 is a mechanism diagram of the roller with a built-in motor of FIG. FIG. 3 is an explanatory diagram schematically showing an internal structure of the motor built-in roller of FIG. FIG.
FIG. 2 is a partially cutaway perspective view of the roller with a built-in motor of FIG. 1.

In FIG. 1, reference numeral 1 denotes a motor built-in roller according to a specific embodiment of the present invention. The roller 1 with a built-in motor according to the present embodiment has a motor body 3 and a speed reducer 5 built into a roller body 2, and the inside of the roller body 2 is largely divided into a motor portion A and a speed reducer portion B as shown in the figure. I have. Further, as a configuration unique to the present embodiment, the roller body 2 has a double structure in which the cylindrical body 6 is built in the roller body 2.

To explain from the roller body 2, the roller body 2 is a cylindrical member, and fixed shafts 7, 8 protrude from both ends. Each of the fixed shafts 7 and 8 communicates between the inside and the outside of the roller body 2, and has two bearings 10 and 10, respectively.
A cylindrical portion of the roller main body 2 is supported via 11.
Therefore, the roller body 2 can rotate regardless of the fixed shafts 7 and 8. A passive member 1 is provided on the inner peripheral side of the roller body 2.
5 are integrated.

The cylindrical body 6 is a cylinder whose outer diameter is small enough not to contact the inside of the roller body. The tubular body 6 is inserted into the roller body 2 in a suspended manner as described later, and the motor 3 and the speed reducer 5 are unitized and built therein. In other words, the motor 3 and the speed reducer 5 are covered by the tubular body 6.

The motor 3 is composed of a stator 13 and a rotor 14, similarly to a well-known roller with a built-in motor. Here, the stator 13 is a coil housed in an iron core. The stator 13 is inserted into the tubular body 6 and integrally attached thereto. On the other hand, the rotor 14 is at the center of the tubular body 6 and is rotatably supported by a bearing 12 fixed to the tubular body 6.

The speed reducer 5 is a triple planetary gear train. As shown in FIG. 2, a sun gear 20, a first planetary gear 21, an interlocking gear 22, a second planetary gear 23, an interlocking gear 24, a third planetary gear It comprises a gear 25 and a fixed internal gear 26. The sun gear 20 is connected to the rotor 14 of the motor, and the fixed internal gear 26 is inserted and fixed inside the cylindrical body 6. The arm 30 of the third planetary gear 25 is
Functions as an output shaft.

Next, the fixing relationship between the cylindrical body 6 and the roller body 2 will be described. The end of the tubular body 6 on the motor 3 side is
It is supported by the fixed shaft 7 of the roller body 2 via a buffer member 32. That is, a disk-shaped buffer member 32 is fixed to an end of the fixed shaft 7 in the roller body 2.
The outer peripheral side of 2 is engaged with the inner surface of the cylindrical body 6. Here, the cushioning member 32 has elasticity and absorbs vibration and shock, and is made of rubber or resin. The other end of the cylindrical body 6 is supported by the passive member 15. That is, the central axis 36 of the arm 30 serving as the output shaft of the cylindrical body 6 is supported by the hole 35 provided at the center of the passive member 15. As a result, both ends of the tubular body 6 are supported in the radial direction by the fixed shaft 7 and the passive member 15, and the tubular body 6 is arranged in a suspended state at a position concentric with the roller body 2.

A buffer member 33 is interposed between the central shaft 36 of the arm 30 serving as the output shaft of the speed reducer 5 and the passive member 15, and the rotational force of the central shaft 36 is transmitted through the buffer member 33. It is transmitted to the passive member 15 side. The material of the cushioning member 33,
The same properties as those of the cushioning member 32 described above can be used. For example, it is preferable to use a polyester elastomer or the like.

Next, the function of the motor built-in roller 1 of the present embodiment will be described. When the rotor 10 of the motor 3 rotates, the sun gear 20 serving as the input shaft of the speed reducer 5 rotates at a predetermined reduction ratio, and the central shaft 36 of the speed reducer 5 is reduced. Rotate. Then, the rotational force of the central shaft 36 is transmitted to the roller main body 2 via the buffer member 33, and the roller main body 2 rotates at a predetermined rotation speed.

During the operation of the motor built-in roller 1 as described above, the operation noise is mainly generated from the motor 2 and the speed reducer 5. Here, in the motor built-in roller 1 of the present embodiment, the motor 2 and the speed reducer 5 are covered by a cylindrical body 6 separate from the roller body 2. Therefore, the sound generated from the motor 2 and the speed reducer 5 is sealed by the cylindrical body 6 and does not leak outside. In addition, since the outer peripheral surface of the cylindrical body 6 and the inner peripheral surface of the roller body 2 are separated from each other, and the cylindrical body 6 is suspended in the air, the vibration of the cylindrical body 6 is not transmitted to the roller body 2. Further, cushioning members 32 and 33 are disposed on the support portion of the tubular body 6, and the tubular body 6 is provided with the cushioning members 32 and 33.
Since the roller body 2 is in contact with the roller body 2 via 33, the vibration caused by the sound of the cylindrical body 6 is absorbed by the buffer members 32 and 33, and the vibration of the sound of the cylindrical body 6 is It does not reach 2 Therefore, the motor 2 and the speed reducer 5
The operating noise generated by the motor is not transmitted to the outside, and the roller 1 with the built-in motor is driven very quietly. In particular,
A noise prevention effect of about 15 to 20 dB is exhibited as compared with a conventional roller with a built-in motor.

In this embodiment, since the rotational force is transmitted to the roller body via the buffer member 33, the motor 2 and the speed reducer 5 can be used when an impact load is applied to the roller body 2.
This has the additional effect of preventing damage to the device.

In the above-described embodiment, the structure in which both the motor 2 and the speed reducer 5 are completely covered by the cylindrical body 6 is disclosed. However, only one of the motor 2 and the speed reducer 5 is mounted on the cylindrical body 6. A certain noise prevention effect can be expected even if the motor 2 and a part of the speed reducer 5 are covered with the cylindrical body 6.

[0023]

According to the roller with a built-in motor of the present invention, a cylindrical body is built in the roller body, and the motor and the like are covered with the cylindrical body. Blocked by the body, no noise leaks to the outside. Therefore, the motor built-in roller of the present invention has a quiet operation sound.

Further, in the motor built-in roller according to the second and third aspects, the vibration of the cylindrical body is prevented from being transmitted to the roller body and the fixed shaft by the buffer member. Therefore, the motor built-in roller of the present invention has a quieter operation sound.

[Brief description of the drawings]

FIG. 1 is a sectional view of a roller with a built-in motor according to a specific embodiment of the present invention.

FIG. 2 is a mechanism diagram of a motor built-in roller of FIG. 1;

FIG. 3 is an explanatory diagram schematically showing an internal structure of the motor-equipped roller of FIG. 1;

FIG. 4 is a partially cutaway perspective view of the motor built-in roller of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roller with a built-in motor 2 Roller main body 3 Motor 5 Reduction gear 6 Cylindrical body 7, 8 Fixed shaft 32 Buffer member 33 Buffer member

Claims (3)

[Claims] 1. A roller with a built-in motor in which a motor and a speed reducer are built in the roller body, and the rotational force of the motor is reduced by the speed reducer and transmitted to the roller body, and the roller body rotates. A roller with a built-in motor, wherein a cylindrical body separate from the main body is incorporated, and a part or all of a motor and a speed reducer are covered by the cylindrical body. 2. The roller with a built-in motor according to claim 2, wherein a buffer member is interposed between the roller body and the speed reducer, and the rotational force is transmitted through the buffer member. 3. The roller with a built-in motor according to claim 1, further comprising a fixed shaft communicating with the inside and outside, and wherein the tubular body is attached to the fixed shaft via a buffer member.