JP2001218421A - Geared motor - Google Patents

Abstract

(57) [Problem] To provide an inexpensive housing for a geared motor incorporating a motor and a gear reducer with a small number of dies. SOLUTION: A case body 3, an upper cover 2, and a lower cover 4 are provided.
The motor 5 and the gear reducer 6 are housed in parallel in the housing 1 composed of
A geared motor integrally provided with a partition wall 3a for partitioning
Axial dimension change can be easily performed only with the case body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor used for powering equipment such as equipment and labor-saving equipment and a geared motor having a gear reducer built in a housing.

[0002]

2. Description of the Related Art In recent years, geared motors have been increasingly used for not only power such as conveyors but also various other applications. Therefore, demands for smaller, lighter, space-saving and inexpensive geared motors have increased. I have.

[0003] The geared motor has a structure in which the motor and the speed reducer are configured separately from each other and combined later, and
One case is an integrated system in which a motor and a speed reducer are built.

[0004] When the manufacturer of the motor and the speed reducer are different from each other, it is necessary to match the mounting dimensions of the individual type geared motor to the other party in order to combine the motor and the speed reducer.

[0005] On the other hand, in the case of an integrated geared motor, there is no need for it, and the demand is rapidly increasing in recent years because it is easy for users to use.

In addition, there are a cylindrical type and a housing type in the integrated system. In particular, a housing type geared motor has good workability for mounting to equipment and heat radiation, and ensures airtightness of the geared motor itself. It is easy to secure a space for mounting the circuit and the circuit section.

[0007] A case-integrated geared motor previously filed by the present applicant will be described below.

In FIG. 4, reference numeral 31 denotes a substantially rectangular parallelepiped gear case; 32, a gear cover; 33, a motor;
Is fixedly fitted to the gear case 31, and the rotor 33b is supported by ball bearings provided on the gear case 31 and the bracket 33c. Reference numeral 34 denotes a gear reducer, which includes a plurality of reduction gear groups 34a and an output shaft 34b, and functions as a geared motor by fixing the gear case 31 and the gear cover 32.

First, the motor 33 is assembled into the gear case 31, then the reduction gear group 34a and the output shaft 34b are assembled, and finally the gear cover 32 and the gear case 31 are engaged and fixed with bolts.

At this time, the motor pinion gear provided on the motor output shaft meshes with the first gear of the reduction gear group. Thus, the rotational force of the motor is transmitted to the output shaft of the gear reducer while sequentially reducing the speed from the motor pinion gear of the motor output shaft.

[0011]

However, in the case where the above-described conventional configuration is adapted to the addition of functions such as a motor or an electromagnetic brake having a different output, or in the case of being adapted to a gear reducer having a different reduction ratio, there are a large number of cases. However, there is a problem that a unique gear case mold and a gear cover mold are required, and a large mold cost is required.

An object of the present invention is to solve the above-mentioned conventional problems and to provide an inexpensive housing for a geared motor having a built-in motor and a gear reducer with a small number of dies.

[0013]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a motor and a gear reducer which are housed in parallel in a housing composed of a case body, an upper cover, and a lower cover.
A partition wall for partitioning the motor and the reduction gear group is integrally provided on the case body.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to solve the above-mentioned problems, the present invention provides a motor and a gear reducer which are housed in parallel in a case composed of a case body, an upper cover and a lower cover, A geared motor integrally provided with a partition wall that separates the motor and the reduction gear group. The axial dimension can be easily changed only by the case body.

Further, in the geared motor according to claim 1, wherein the case body is obtained by extrusion, the case body can be changed only by changing the pushing stroke in the axial direction.

The geared motor according to claim 1 or 2, wherein the shafts of the gear reducers supported by the upper cover and the lower cover are arranged so as to be aligned with each other, and the upper cover and the lower cover are shared. The mold for the upper cover and the lower cover can be shared.

[0017]

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

(Embodiment 1) In FIG. 1, a substantially rectangular parallelepiped housing 1 is composed of an upper cover 2, a case body 3, and a lower cover 4, and the case body 3 has a motor 5, a reduction gear group 6a, and an output shaft. The case main body 3 is integrally provided with a partition wall 3a for separating the motor 5 and the reduction gear group 6a. Grease is applied to the reduction gear group 6a. Further, ball bearings are mounted on the upper cover 2 and the lower cover 4, and support the respective rotating shafts.

When the motor 5 rotates, the motor shaft 5
a is meshed with the first-stage reduction gear, and is sequentially reduced by the reduction gear group 6a while the output shaft 6 is engaged.
b to transmit the rotational force.

Next, a method of assembling the motor 5 will be described. The stator 5b is fixed in the partition wall 3a, and the
c is fitted and fixed to a spigot provided at the end of the partition wall 3a, and a ball bearing is attached. A ball bearing for supporting the rotating shaft of the rotor 5d on the upper cover 2, the shaft of the reduction gear group 6a, and the output shaft 6
The rotor 5d and the reduction gear group 6a are mounted by mounting a ball bearing for supporting the rotor b. Further, a reduction gear group 6a is attached to the lower cover 4.
And the upper cover 2, the case body 3, and the lower cover 4 are fixed with bolts.

The case body 3 is integrally provided with a partition wall 3a for partitioning a motor and a reduction gear group (FIG. 2), and is made of an extruded aluminum die-cast material. The partition wall made of this material is partially removed from one side in accordance with the specifications of the motor and the gear reducer, so that the axial dimension can be changed according to the characteristics of the geared motor.

Further, a hole for a lead wire for supplying a current to the stator winding of the motor, a spigot portion fitted with a bracket, and the like are additionally processed.

As described above, since the geared motors having different motor outputs and reduction ratios of the gear reducer are configured with the same mounting pitch (mounting surface), the geared motor is more convenient than before. In addition, since it can be composed of one type of upper cover, case body, and lower cover, die costs can be reduced.

(Embodiment 2) In FIG.
Is arranged such that the shaft of the gear reducer is symmetrically disposed so that the shaft can be shared by the upper cover and the lower cover, and the bearing portion 21a that supports the shaft is also symmetrically arranged. The upper cover and the lower cover can be shared. Other than that is the same as the first embodiment.

As described above, since the cover can be shared and used as one type, the mold and the parts can be further reduced in cost.

[0026]

As is clear from the above embodiments, according to the first and second aspects of the present invention, the same extrusion die is used for changing the output of the geared motor and the reduction ratio of the gear reducer. It is possible to cope with the axial dimension of the housing simply by changing the extrusion stroke.

According to the third aspect of the present invention, the upper cover and the lower cover can be integrated by arranging the shaft of the gear reducer symmetrically.

As described above, it is possible to obtain an inexpensive geared motor that can cope with a change in the output of the geared motor and a change in the reduction ratio of the gear reducer by changing the axial dimension of the housing with a small number of dies. it can.

[Brief description of the drawings]

FIG. 1 is a sectional view of a geared motor according to a first embodiment of the present invention.

FIG. 2 is a plan view of a main body case according to the first embodiment of the present invention.

FIG. 3 is a plan view of an upper cover according to a second embodiment of the present invention.

FIG. 4 is a sectional view of a conventional geared motor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2, 21 Upper cover 3 Case main body 3a Partition wall 4 Lower cover 5 Motor 6 Gear reducer 6a Reduction gear group

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5H605 AA07 AA08 BB05 CC01 CC02 CC08 DD09 EB10 FF00 GG14 GG16 5H607 AA00 AA11 AA12 BB01 BB14 CC03 DD19 EE31 EE36 GG07 GG08 KK00

Claims (3)

[Claims] 1. A motor and a gear reducer are accommodated in a housing constituted by a case body, an upper cover and a lower cover in parallel,
A geared motor, wherein a partition wall for separating a motor and a reduction gear group is integrally provided on the case body. 2. The geared motor according to claim 1, wherein the case body is obtained by extrusion. 3. The geared motor according to claim 1, wherein the shafts of the gear reducers supported by the upper cover and the lower cover are arranged so as to be aligned with each other, and the upper cover and the lower cover are shared.