JP2001225939A - Roller having built-in motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure usable for developing a roller having a built-in motor having little failure of a reduction gear and applicable to a roller having the built-in motor with a short entire length. SOLUTION: The motor 3 and the reduction gear 5 are embedded into a roller body 2. A blocking member 7 and a connection member 32 are provided as a specific structure. The blocking member 7 is provided with eight holes 37. The connection member 32 is provided with either leg parts 48. An output shaft 31 of the reduction gear engages with a spline hole 43 in the connection member 32. The leg parts 48 of the connection member 32 engage with holes 37 in the blocking member 7. The blocking member 7 is integrated with the roller body 2. A rotation force is transmitted from the output shaft 31 of the reduction gear 5 to the roller body 2 through the connection member 32 and the blocking member 7. The connection member 32 deforms by torsion of the leg parts 37 and has high deformation performance, so that an external impact is absorbed by the connection member 32 and is not transmitted to the reduction gear 5 to avoid breakdown of the reduction gear 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

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

[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 unit and a reduction gear built in a roller body is widely known (Japanese Utility Model Laid-Open No. 59-40220 and others). ). The roller with built-in motor has a motor and a reduction gear built into the roller body, so there is no need for a place to install them, not only has the effect of saving space, but also the configuration of the conveyor is extremely simple, and the conveyor has a very simple structure. It is also preferable in terms of assembly. However, the roller with a built-in motor requires a speed reducer having a complicated structure to be housed in a small roller body, so that the components of the speed reducer are small, and the rigidity of the speed reducer must be reduced. Therefore, with a roller with a built-in motor, the speed reducer is most easily broken. Therefore, in a conventional roller with a built-in motor, a device has been devised to protect the speed reducer by incorporating a torque limiter or transmitting power to the roller body via a cushioning member made of an elastic body (for example, Japanese Utility Model Application Laid-Open No. 6-78324). No.).

[0003]

However, there has been a dissatisfaction that a structure having a built-in torque limiter cannot be applied to a motor built-in roller having a short overall length. That is, the roller with a built-in motor of the related art incorporates a protection member such as a torque limiter and a buffer member. However, in a roller with a built-in motor having a short overall length, there is no space for a torque limiter and the like. Therefore, for example, a roller with a built-in motor having a short overall length, such as a roller body having a total length of less than 200 mm, could not adopt the structure of the prior art, and could not add a protection member for the reduction gear. Therefore, the present invention
It is an object of the present invention to develop a roller with a built-in motor that has few failures of a speed reducer, and to provide a configuration that can be applied to a roller with a built-in motor having a short overall length. It is.

[0004]

According to the first aspect of the present invention, there is provided a cylindrical roller body, a fixed shaft projecting from an end of the roller body, and an end of the roller body. The roller body has a motor part and a speed reducer built in, and the rotational force of the motor part is reduced by the speed reducer and transmitted to the roller body, and the roller body is moved relative to the fixed shaft. In the rotating roller with a built-in motor, the closing member is mounted so as to rotate together with the roller body, the output shaft of the speed reducer is connected to the closing member, the closing member rotates, and rotational force is applied to the roller body via the closing member. The member that is transmitted and further connects a part of the closing member or the output shaft to the closing member has a deformability, and is a motor built-in roller. In the present invention, the output shaft of the speed reducer may be directly connected to the closing member, or the output shaft may be connected to the closing member via another member.

The roller with a built-in motor according to the present invention has a motor unit and a speed reducer built in the roller body as in the conventional roller, and the rotational force generated by the motor unit is reduced by the speed reducer. In the roller with a built-in motor according to the present invention, the output shaft of the speed reducer is connected to the closing member, the closing member rotates, and the roller body is rotated via the closing member. Here, in the motor built-in roller of the present invention, a part of the closing member or a member connecting the output shaft and the closing member has deformability. Therefore, for example, when the transported object is urged and placed on the roller with a built-in motor, or when the transported object collides with an obstacle and stops suddenly, the roller with the built-in motor receives a shocking rotational force from the outside. In this case, the shocking rotational force is applied to the closing member or the like before being applied to the speed reducer, and is absorbed by its deformability. As a result, the shocking rotational force applied to the speed reducer is reduced.

A second aspect of the present invention is to solve the same problem.
The invention described in (1) has a cylindrical roller body, a fixed shaft projecting from an end of the roller body, and a closing member that closes an end of the roller body, and a motor unit and a speed reducer inside the roller body. Built-in, the rotational force of the motor part is reduced by a speed reducer and transmitted to the roller body, and in a motor built-in roller in which the roller body rotates with respect to a fixed shaft, the closing member is attached so as to rotate with the roller body, and the speed is reduced A connecting member that connects the output shaft of the machine and the closing member, the closing member rotates through the connecting member, and a rotational force is transmitted to the roller body through the closing member. A roller with a built-in motor, which has higher deformability than a member.

In the roller with a built-in motor according to the present invention, the rotational force of the output shaft of the speed reducer is transmitted to the closing member via the connecting member, and further transmitted to the roller body. Here, in the motor built-in roller of the present invention, the connecting member has high deformability.
Therefore, in the roller with a built-in motor according to the present invention, the shocking rotational force is applied to the connecting member before being applied to the speed reducer, and is absorbed by its deformability. As a result, the shocking rotational force applied to the speed reducer is reduced.

According to a third aspect of the present invention, the closing member is provided with a plurality of holes at portions other than the center, the connecting member has a plurality of protrusions, and the protrusions of the connecting member fit with the holes of the closing member. 3. The roller with a built-in motor according to claim 1, wherein

The closing member employed in the roller with a built-in motor according to the present invention has a plurality of holes at portions other than the center.
Here, in general, the closing member needs to have considerable rigidity, and thus is often made of metal. However, the provision of the plurality of holes reduces the weight. In the present invention, power is transmitted by fitting the projection of the connecting member into the hole.

According to a fourth aspect of the present invention, the output shaft of the speed reducer is located at the center of the roller body, and the radial load of the output shaft of the speed reducer is supported by the connecting member. 4. The roller with a built-in motor according to any one of 1 to 3.

In the roller with a built-in motor according to the present invention, the connecting member not only transmits the rotational force but also has a function of supporting a radial load. Therefore, the motor-equipped low of the present invention can be applied to a motor-equipped roller having a shorter overall length, and can maintain high rigidity as a whole.

[0012]

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 a front sectional view and left and right side views of a closing member employed in the roller with a built-in motor of FIG. 1. FIG. 4 is a front view of a connecting member employed in the motor built-in roller of FIG. FIG. 5 is a left-side view and a cross-sectional view taken along line AA of the left-side view of the connecting member in FIG. 4. FIG. 6 is a perspective view of the vicinity of the closing member and the connecting member employed in the motor built-in roller of FIG.

The roller 1 with a built-in motor according to the present embodiment is characterized in that one of the closing members 7 has a special structure and further has a connecting member 32 that fits with the closing member 7. Prior to the description, the configuration of a part common to the known roller 1 with a built-in motor will be briefly described.

The roller 1 with a built-in motor according to this embodiment has a motor 3 and a speed reducer 5 built in a roller body 2 as in the prior art, and the inside of the roller body 2 is greatly enlarged as shown in FIG. A and a reduction gear section B. Here, the roller body 2 is a metal cylindrical body having both ends opened. The closing members 6 and 7 are attached to both ends of the roller body 2, and both ends of the roller body 2 are closed by the closing members 6 and 7. Of the left and right closing members 6 and 7, the closing member 7 shown on the left side of the drawing has a configuration unique to the present invention, and details of the structure will be described later.

From both ends of the roller body 2, fixed shafts 10,
11 protrudes. Among the fixed shafts 10 and 11, the fixed shaft 11 on the left side of the drawing is a simple rod-shaped member, and is rotatably attached to the closing member 7 on the left side of the drawing by two bearings 12. That is, the fixed shaft 11 has a rod shape, is attached to the closing member 7 in a cantilever manner, and is rotatable with respect to the closing member 7. The fixed shaft 11 merely protrudes outward from the closing member 7.
Does not extend inside.

On the other hand, the fixed shaft 1 shown on the right side of the drawing
Numeral 0 communicates between the inside and outside of the roller body 2 and occupies a large volume inside the roller body 2 as well. That is, the fixed shaft 10 is rotatably attached to the closing member 6 via the bearing 15, and communicates the inside and outside of the roller body 2. The fixed shaft 10 has an enlarged diameter inside the roller main body 2, and an inner cylindrical member 8 is integrally attached to an outer peripheral portion thereof. The inner cylinder member 8 is a cylinder having an outer diameter such that the outer diameter does not contact the inside of the roller body, and its length is obtained by subtracting the lengths of the two closing members 6 and 7 from the entire length of the roller body 2. Almost equal to things. The motor 3 and the speed reducer 5 are unitized and built in the inner cylinder member 8.

The motor 3 includes a stator 13 and a rotor 14, similarly to a 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 inner cylinder member 8 and is integrally attached to the inner cylinder member 8. On the other hand, the rotor 14 is located at the center of the inner cylindrical member 8, and one end thereof is rotatably supported by the fixed shaft 10 on the right side in the drawing via a bearing 16.

The speed reducer 5 is a three-stage 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 3, and the fixed internal gear 26 is inserted and fixed inside the inner cylindrical member 8. The central axis 31 of the arm 30 of the third planetary gear 25 is located at the center of the motor-equipped roller 1 and functions as an output shaft.

Then, the rotation of the output shaft 31 of the speed reducer 5 is transmitted to the roller body 2 to rotate the roller body 2. Here, the power transmission path from the output shaft 31 to the roller body 2 is
This is specific to the present embodiment, and will be described in detail. That is, in the roller 1 with a built-in motor according to the present embodiment, the output shaft 31
Is connected to the connecting member 32, power is transmitted from the connecting member 32 to the closing member 7, and rotational force is transmitted to the roller body 2 via the closing member 7. The closing member 7 employed in the motor-equipped roller 1 of the present embodiment is made by a die-casting method using a zinc alloy as a material, and has a short columnar shape as shown in FIGS. A through hole 35 through which the fixed shaft 11 is inserted is provided at the center of the closing member 7, and a ball bearing 12
Is provided. Eight holes 37 are provided inward at the outer peripheral portion of the concave portion 36. The closing member 7 used in the present embodiment
Is made of zinc die cast, so it has considerable rigidity. However, since as many as eight holes 37 are provided, the volume is substantially small and the weight is light.

On the other hand, the connecting member 32 is made of a resin such as nylon, and has a disk portion 40 as shown in FIGS. A boss portion 41 is provided at the center of the disk portion 40. Also, the boss portion 41 has
A spline hole 43 is provided as shown in FIG. Eight legs 48 are provided on the surface of the disk 40 opposite to the boss 41. The connecting member 32 is made of nylon or the like as described above, and has greater deformability than the closing member 7 made of metal such as zinc. In addition, since the connecting member 32 has the elongated leg portion 48, its deformability is higher.

In the motor built-in roller 1 of the present embodiment, the output shaft 31 of the speed reducer is inserted into the spline hole 43 of the connecting member 32 and fitted therein. The legs 48 of the connecting member 32 are all inserted into and fitted in the holes 37 of the closing member 7. Further, the closing member 7 is engaged with the roller main body 2 by a pin 50, and the closing member 7 is integrated with the roller main body 2.

In the motor built-in roller 1 of the present embodiment, the motor 3 and the speed reducer 5 are supported at one end by the fixed shaft 10 via the bearing 16 and at the other end by the connecting member 32 described above. . Therefore, in the motor-equipped roller 1 of the present embodiment, the radial loads of the motor 3 and the speed reducer 5 are supported by the connecting member 32.

Next, the function of the roller 1 with a built-in motor according to the present embodiment will be described. Roller 1 with built-in motor of this embodiment
When the rotor 10 of the motor 3 rotates, the sun gear 20 serving as the input shaft of the speed reducer 5 rotates, the speed is reduced at a predetermined reduction ratio, and the output shaft 31 of the speed reducer 5 rotates. And output shaft 3
The rotation force of 1 is transmitted to the connecting member 32 by the fitting of the spline hole 43. Since the leg 48 of the connecting member 32 is fitted in the hole 37 of the closing member 7, the closing member 7 also rotates according to the rotation of the connecting member 32. And the closing member 7
Are engaged with the roller body 2 by the pins 50. Therefore, the rotation of the output shaft 31 is transmitted to the roller body 2 via the connecting member 32, the closing member 7, and the pin 50, and the roller body 2 rotates with respect to the fixed shafts 10 and 11.

On the other hand, when the roller body 2 is shockedly rotated at a speed higher than the rotation speed, such as when the conveyed object is slid on the slope vigorously and placed on the conveyor device,
When the load fluctuates abruptly, such as when the transported object hits an obstacle and suddenly stops, the connecting member 32 having high deformability bends and absorbs an impact. That is, since the connecting member 32 employed in the present embodiment is made of nylon resin, the material itself has a certain degree of deformability as a property of the material itself. In addition, the connecting member 32 has the leg portion 48 and is deformed by twisting the leg portion 48, so that the connecting member 32 has a high deformability structurally. Therefore, external shocks are absorbed by the connecting member 32 and are not transmitted to the speed reducer 5, so that the destruction of the speed reducer 5 is avoided.

As described above, in the motor built-in roller 1 of the present embodiment, the connecting member 32 supports the radial load of the motor 3 and the speed reducer 5 and also serves as a part of the power transmission path. In addition, in the motor built-in roller 1, the connecting member 32
Functions as a shock absorbing member for absorbing a sudden load change. As described above, in the roller 1 with a built-in motor according to the present embodiment, one connecting member 32 also serves three important functions. Therefore, the total length of the roller with a built-in motor is shortened as compared with a case where members having these functions are individually provided. can do.
Therefore, the roller 1 with a built-in motor of the present embodiment is recommended as a structure of a roller with a built-in motor having a short overall length.

In the embodiment described above, the hole 37 is provided in the closing member 7 and fitted to the leg 48 provided on the connecting member 32. On the contrary, a projection is provided on the closing member 7 and the hole is formed in the connecting member 32. And they may be fitted together. Further, other known fitting structures can be adopted. Further, the closing member and the connecting member may be integrated, and the output shaft 31 of the speed reducer may be directly connected to the closing member.

[0027]

As described above, the roller with a built-in motor according to the present invention has the effect of reducing the failure of the speed reducer, and the present invention has the effect of being applicable to a roller with a built-in motor having a short overall length. . In particular, in the roller with a built-in motor according to claim 1, the roller body is rotated via the closing member, and a part of the closing member or a member connecting the output shaft and the closing member has a deformability, Absorbs shock.

Further, in the roller with a built-in motor according to the present invention, a connecting member for connecting the closing member and the output shaft of the speed reducer is provided, and the connecting member has a high deformability, so that a shocking rotational force is provided. Is absorbed by the connecting member. Therefore, the roller with a built-in motor according to the present invention has an effect that the impact applied to the speed reducer is reduced and the breakdown of the speed reducer is reduced.

Further, the third aspect of the present invention has an effect that the weight of the motor built-in roller can be reduced.

In the motor built-in roller according to the present invention, the connecting member not only transmits the rotational force but also has the function of supporting the radial load, so that the motor can be further reduced in size and the motor has a shorter overall length. There is an effect that the protection function of the reduction gear can be added to the built-in roller.

[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 a front sectional view and left and right side views of a closing member employed in the motor built-in roller of FIG. 1;

FIG. 4 is a front view of a connecting member employed in the motor built-in roller of FIG. 1;

FIG. 5 is a left side view of the connecting member of FIG. 4 and FIG.
It is A sectional drawing.

6 is a perspective view of the vicinity of a closing member and a connecting member employed in the motor built-in roller of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roller with a built-in motor 2 Roller body 5 Reduction gear 6,7 Closure member 10,11 Fixed shaft 32 Connecting member 37 Hole 48 Leg

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Tomoyuki Fujimoto 1146 Asazuma-cho, Kasai-shi, Hyogo F-term (reference) 3F033 BB01 BC02 BC07 BC08 GA02 GA06 GB08 GE06

Claims (4)

[Claims] 1. A roller body comprising: a cylindrical roller body; a fixed shaft projecting from an end of the roller body; and a closing member for closing an end of the roller body. The rotation force of the motor unit is reduced by the speed reducer and transmitted to the roller body. In the motor built-in roller in which the roller body rotates with respect to the fixed shaft, the closing member is attached to rotate with the roller body, The output shaft is connected to the closing member, the closing member rotates, the rotational force is transmitted to the roller body via the closing member, and a part of the closing member or the member connecting the output shaft and the closing member is deformed. A roller with a built-in motor, which has a function. 2. A roller body comprising: a cylindrical roller main body; a fixed shaft projecting from an end of the roller main body; and a closing member for closing the end of the roller main body. The rotation force of the motor unit is reduced by the speed reducer and transmitted to the roller body. In the motor built-in roller in which the roller body rotates with respect to the fixed shaft, the closing member is attached to rotate with the roller body, A connecting member for connecting the output shaft and the closing member to each other, the closing member rotates through the connecting member, and rotational force is transmitted to the roller body via the closing member. A roller with a built-in motor, which has higher deformability than that of (1). 3. The closing member is provided with a plurality of holes in a portion other than the center, the connecting member has a plurality of protrusions, and the protrusions of the connecting member are fitted with the holes of the closing member. Item 3. The roller with a built-in motor according to Item 1 or 2. 4. The output shaft of the speed reducer is located at the center of the roller body, and a radial load of the output shaft of the speed reducer is supported by a connecting member. Roller with built-in motor.