JP2001106330A - Belt driving motor pulley, belt conveyer apparatus, and motor roller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a belt driving motor pulley and a motor roller, capable of having sufficiently high rotational torque without having a built-in reduction gear. SOLUTION: This belt driving motor pulley, used as a belt conveyer driving pulley, is provided with a fixed shaft 6b and a cylinder 3 rotating relative to the fixed shaft 6b. The cylinder includes a plurality of brushless motors 4 disposed in a line in the axial direction of the cylinder 3. Each of the motors are provided with a stater 4a fixed on the fixed shaft 6b and a driven element 4b fixed on the cylinder 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a belt conveyor device. The present invention also relates to a motor pulley for driving a belt, which can be used as a driving pulley of a belt conveyor and has a motor and a speed reducer built in a cylindrical body. Further, the present invention relates to a motor roller that can be used as a motor pulley of a belt conveyor or a roller with a built-in motor of a roller conveyor.

[0002]

2. Description of the Related Art A conventional motor roller of this kind is, for example,
JP-A-6-56026, JP-A-11-79358
As disclosed in the publication, a motor and a speed reducer are built in a cylindrical roller body, and the rotating force of the built-in motor is reduced by the speed reducer and transmitted to the roller body. As a result, the roller body itself is driven to rotate at the reduced rotation speed.

In this conventional motor roller, the size of the rotor and stator of the built-in motor is limited, and the rotating torque of the motor itself is relatively small. The ratio is set to about 0.1 or less, so that a necessary torque is obtained.

[0004]

The applicant of the present invention has been intensively researching the use of the motor roller as a motor pulley for driving a belt of a belt conveyor. In order to form a belt conveyor, it is necessary to drive a conveyor belt on which a plurality of objects are placed by one or two belt drive motor pulleys. In a roller conveyor using motor rollers, a plurality of rollers as driving sources are provided at regular intervals, so that only one conveyed object may be conveyed by a plurality of motor rollers, and a load is applied to the conveyed object and the roller. Therefore, a relatively small rotating torque per motor roller is sufficient, but in the case of a motor pulley in a belt conveyor, the number of times per motor pulley is several times larger than in the case of a roller conveyor. A rotational torque is required. In order to satisfy such a demand, a high-speed reduction gear is usually built in the motor pulley.

However, when a reduction gear is incorporated, there is a problem that the life of the product is shortened due to wear of the gears and noise is increased. Further, in order to incorporate the speed reducer, a certain amount of inner diameter of the roller body is required, and there is a limit to downsizing.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a belt driving motor pulley and a motor roller having a sufficient rotational torque without incorporating a speed reducer. Still another object of the present invention is to provide a belt conveyor device that can be further reduced in size.

[0007]

Means for Solving the Problems In order to achieve the above object, the present invention takes the following technical means.

That is, the present invention relates to a belt driving motor pulley used as a driving pulley of a belt conveyor, which comprises a fixed shaft and a cylindrical body rotating with respect to the fixed shaft, and a plurality of brushless motors in the cylindrical body. Motors are built-in, the plurality of motors are arranged in a row in the axial direction of the cylindrical body, each motor includes a stator and a follower, and the stators of the plurality of motors are fixed to a fixed shaft. The follower of this motor is fixed to a cylindrical body.

According to the present invention, since a plurality of brushless motors are directly connected, a sufficient rotational torque can be obtained without a reduction gear. In addition, the omission of the speed reducer creates a margin in the internal space of the cylindrical body that is the roller body, and allows for ample parts placement while incorporating multiple motors, assembling and operation stability. Can also be improved.

Further, according to the motor pulley of the present invention,
Since a reduction gear is not required, there is no need to consider the life of the reduction gear, and since a brushless motor is used,
There is no carbon abrasion and extremely excellent durability. Furthermore, since a reduction gear is not required, it is possible to significantly reduce noise. In addition, since the brushless motor is employed, there is an advantage that the speed can be easily adjusted.

In the above motor pulley of the present invention, a rotating shaft that rotates integrally with the cylindrical body is provided in the cylindrical body,
A follower is fixed to the rotating shaft, a stator is provided around the follower, and the plurality of stators can be fixed to an inner surface of a support cylinder fixed to the fixed shaft. According to this, at the time of assembling, a plurality of followers are assembled to the rotating shaft, and the rotating shaft is assembled in the cylinder, and a plurality of stators are assembled to the supporting cylinder, and the supporting cylinder is assembled in the cylindrical body. By assembling, a plurality of directly connected motors can be configured, so that the assembling workability is improved and the productivity is improved. Also,
The structure is also simplified and contributes to the improvement of durability. In such a configuration, the stator is preferably formed by an electromagnetic coil, and the rotor is preferably formed by a permanent magnet.

A Hall IC may be provided around the magnetic poles of the rotor constituting the motor.
A substrate is fitted inside one end of the support cylinder, and a Hall IC is mounted on the substrate.
And a magnetic pole rotator can be provided on the rotating shaft near the Hall IC. According to such a configuration, even when a relatively large stator and rotor are used which are just fitted into the cylindrical body in order to obtain a large output torque,
There is no need to provide a Hall IC around the motor rotor,
A hole I is placed near a small magnetic pole rotor provided separately on the rotating shaft.
Since C may be provided, it is possible to reduce the size while having a large output.

In the motor pulley of the present invention, the rotary shaft and the cylindrical body are directly connected and rotate integrally. However, when a larger output torque is required while miniaturizing the motor pulley, the rotary shaft and the cylindrical member are connected to each other. A gear with a reduction ratio of 0.25 or more and 1 or less may be provided between the cylindrical body and the gear. A gear having such a reduction ratio does not require a complicated structure having a large number of gears like a planetary gear mechanism, and can reduce the influence on durability and noise.

The belt conveyor of the present invention uses the motor pulley as a drive source. According to the present invention, since the motor pulley itself is driven to rotate, and the belt wrapped around the pulley can be circulated, no other drive source or transmission mechanism is required, and the motor pulley is Demonstrates sufficient output torque while miniaturizing
Since the belt conveyor can be configured to have a small diameter, the belt conveyor itself can be configured to be very thin and lightweight.

The motor roller of the present invention is not limited to a motor pulley for a belt conveyor, but can be applied to a roller with a built-in motor in a roller conveyor, for example. That is, the motor roller of the present invention includes a fixed shaft and a cylindrical body that rotates with respect to the fixed shaft, and a plurality of brushless motors are built in the cylindrical body, and the plurality of motors are arranged in the axial direction of the cylindrical body. Arranged in a row, each motor has a stator and a follower, the stators of the plurality of motors are fixed to a fixed shaft,
The followers of the plurality of motors are fixed to the cylindrical body, and a rotating shaft that rotates integrally with the cylindrical body is provided in the cylindrical body,
A follower is fixed to the rotating shaft, a stator is provided around the follower, and the plurality of stators are fixed to an inner surface of a support cylinder fixed to the fixed shaft. .

A substrate is fitted into one end of the support cylinder of the motor roller, a hole IC is provided on the substrate, and a magnetic pole rotator is provided on a rotating shaft near the hole IC. can do. Further, a gear having a reduction ratio of 0.25 or more and 1 or less may be provided between the rotating shaft and the cylindrical body.

[0017]

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

FIG. 1 shows a motor roller 1 according to one embodiment of the present invention. The motor roller 1 can be used as a motor pulley serving as a driving source of a belt conveyor device or a motor built-in roller used for a roller conveyor. It is something. FIG. 2 shows a belt conveyor device 2 using the motor roller 1 as a driving pulley.

The motor pulley 1 of the present embodiment includes a main body tube 3 formed of an elongated cylindrical body, and a plurality of DC motors 4 built in the main body tube 3. Caps 5 are fitted into both ends of the main body cylinder 3 in the axial direction.

The cap 5 is provided with a shaft mounting hole 5a penetrating in the axial direction. Shaft mounting hole 5 for each cap 5
On a, fixed shafts 6a and 6b are supported via bearings 7. Each of the fixed shafts 6a and 6b protrudes outward from the cap 5 in the axial direction.

Fixed shafts 6a, 6b on both sides in the axial direction of the main body cylinder 3.
May be integrally connected within the main body tube 3, but in the illustrated embodiment, the fixed shaft 6a protrudes from the right end in the illustrated embodiment.
And the fixed shaft 6b protruding from the left end in the figure are
Are separated within.

One fixed shaft 6a is short, and the axial inner end of the cap 5 that supports the fixed shaft 6a and the axial inner end of the fixed shaft 6a substantially coincide with each other. The other fixed shaft 6b is long and extends axially inward from the cap 5. A support cylinder 8 to which the stator 4a of the motor 4 is attached is fixed to an inner end in the axial direction of the long fixed shaft 6b. The support cylinder 8 is cylindrical and provided concentrically with the main body cylinder 3. The outer diameter of the support cylinder 8 is slightly smaller than the inner diameter of the main body cylinder 3. A minute gap is formed between them. The tip of the support tube 8 is rotatably supported by the main body tube 3 via a bearing 9. The two stators 4a are fixed to the inner surface of the support cylinder 8 with an interval in the axial direction. The stator 4a
Is constituted by an electromagnetic coil.

Inside the support cylinder 8, bearings 10, 1 are provided.
The rotating shaft 12 is rotatably supported via the first shaft 1. The rotating shaft 12 is disposed concentrically with the main body tube 3,
Rotates together with it. That is, the tip of the rotating shaft 12 protrudes from the tip of the support tube 8, and the protruding portion is fixed to the connection boss 13 fixed inside the main body tube 3. Note that, instead of the connection boss 13, the reduction ratio is set to 0.1.
25 to 1 gears (not shown) may be provided, and the rotation of the rotating shaft 12 may be transmitted to the main body cylinder 3 via the gears.

The rotor 4b of each motor 4 is
2 and are fixed at intervals in the axial direction.
The configuration is such that the stator 4a is located around the periphery of the b. Note that the rotor 4b is formed of a permanent magnet.

The motor 4 is a brushless motor that does not have a mechanical rectification structure using brushes and commutators. The motor 4 is driven by electronic rectification by a Hall element and a power switching circuit. In the present embodiment, as the magnetic pole detecting means common to the two motors 4, a Hall IC 14 in which all or a part of the Hall element and the power switching circuit are integrated into one package is provided. A typical configuration of the Hall IC includes a Hall element for detecting the magnitude of a magnetic field, an amplifier for amplifying a detected small signal, a Schmitt trigger circuit for shaping the signal into a square wave, and a stabilized power supply circuit. , And a temperature compensation circuit.

The Hall IC 14 is provided on a substrate 19 fitted inside the base end of the support cylinder 8. Hall IC
Are arranged around a relatively small magnetic pole rotor 15 attached to and fixed to the rotating shaft 12, and detect a change in the magnetic field from the magnetic pole rotor 15 accompanying the rotation of the rotating shaft 12, and Rectifies the supply current to the power supply. In the drawing, reference numeral 16 denotes a wiring to the stator 4a. Substrate 1
9 is provided with a hole at the center thereof.
2 penetrates.

A wiring cord 17 from outside the main body tube 3 is connected to the substrate 19. This wiring code 17
The other fixed shaft 6b is introduced into the main body cylinder 3 through a through hole 18 formed at the center of the shaft.

The motor pulley 1 is used as a drive source of the belt conveyor device 2 shown in FIG. The belt conveyor device 2 includes a pair of left and right frames 21 and 22,
A plurality of idler pulleys 23 supported between the left and right frames 21 and 22; a motor pulley 1 supported between the left and right frames 21 and 22 at both ends of the pulley 23; And a turned endless track belt 24. Fixed shaft 6a, 6 of motor pulley 1
b is fixed to the left and right frames 21 and 22.

According to the belt conveyor device 2, since the motor pulley 1 is used as a driving source, there is no need to provide a power mechanism outside the pulley 1, so that the device configuration can be simplified and the size can be reduced. . Further, since a motor pulley 1 having a plurality of built-in motors 4 directly connected thereto is used, a sufficient rotational torque of the main body cylinder 3 can be obtained without incorporating a high-speed reducer in the motor pulley 1. It is possible to reduce the thickness of the belt conveyor device by reducing the diameter of the belt conveyor.

The assembly of the motor pulley 1 is as follows.
Cap 5 having fixed shaft 6a attached to one end of cylindrical body 3
After that, the fixed shaft 6 b, the support cylinder 8, the motor 4, the wiring cord 17, the rotating shaft 12, and the boss 13 are attached and fixed from the other end opening of the cylindrical body 3.
Finally, the bearing 7 and the cap 5 are mounted. In this way, assembling work can be easily performed,
It is also possible to improve productivity and reduce costs.

[0031]

According to the present invention, a high-speed reduction gear is not required, so that the noise is low and there is no need to consider the life of the reduction gear. In addition, since a brushless motor is used, carbon wear is reduced. Without it, a long-life product can be obtained. Furthermore, because a brushless motor is used,
The rotation speed can be easily adjusted. Further, a sufficient torque can be obtained even with a small-diameter motor pulley, and a very thin belt conveyor device can be configured. The present invention can be particularly usefully applied to a motor pulley having a diameter of about 30 mm.

[Brief description of the drawings]

FIG. 1 is an overall vertical sectional view of a motor pulley (motor roller) according to an embodiment of the present invention.

FIG. 2 is an overall simplified perspective view of the belt conveyor device according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor pulley (motor roller) 2 Belt conveyor device 3 Cylindrical body (body cylinder) 4 Brushless DC motor 4a Stator 4b Follower 6b Fixed shaft 8 Support cylinder 14 Hall IC 15 Magnetic pole rotor 19 Substrate

Claims (8)

[Claims] A belt driving motor pulley used as a driving pulley of a belt conveyor, comprising: a fixed shaft;
A cylindrical body that rotates with respect to the fixed shaft, a plurality of brushless motors are built in the cylindrical body, and the plurality of motors are arranged in a row in the axial direction of the cylindrical body; A motor driven pulley for driving a belt, wherein stators of the plurality of motors are fixed to a fixed shaft, and followers of the plurality of motors are fixed to a cylindrical body. 2. A plurality of stators, wherein a rotating shaft that rotates integrally with the cylindrical body is provided in the cylindrical body, a follower is fixed to the rotating shaft, and a stator is provided around the follower. The belt drive motor pulley according to claim 1, wherein the motor is fixed to an inner surface of a support cylinder fixed to a fixed shaft. 3. A substrate is fitted into one end of the support cylinder, a Hall IC is provided on the substrate, and a magnetic pole rotator is provided on a rotating shaft near the Hall IC. A belt drive motor pulley according to claim 2. 4. A speed reduction ratio between the rotating shaft and the cylindrical body of 0.
The belt driving motor pulley according to claim 2, wherein 25 or more and 1 or less gears are provided. 5. A belt conveyor device using the motor pulley according to claim 1 as a drive source. 6. A fixed shaft and a cylindrical body rotating with respect to the fixed shaft, and a plurality of brushless motors are built in the cylindrical body, and the plurality of motors are arranged in a line in the axial direction of the cylindrical body. Each motor includes a stator and a follower, the stators of the plurality of motors are fixed to a fixed shaft, and the followers of the plurality of motors are fixed to a cylindrical body. A rotation shaft that rotates integrally with the rotation shaft is provided, a follower is fixed to the rotation shaft, a stator is provided around the follower, and the plurality of stators are provided on an inner surface of a support cylinder fixed to the fixed shaft. A motor roller which is fixed. 7. A substrate is fitted inside one end of the support cylinder, a Hall IC is provided on the substrate, and a magnetic pole rotator is provided on a rotating shaft near the Hall IC. The motor roller according to claim 6, wherein: 8. A reduction ratio between the rotating shaft and the cylindrical body of 0.1.
8. The motor roller according to claim 6, wherein 25 or more and 1 or less gears are provided.