JPS622830A - Reversible motor - Google Patents

Abstract

PURPOSE:To decrease manhours required for assembling a motor by holding a wavy spring washer and a brake shoe presser bar spring to apply pre-load to the bearing by means of an end plate which has a convexity to engage with the bearing housing. CONSTITUTION:A braket 1 is built in a wavy spring washer 9, which is then incorporated into a bearing housing 10 from outside the braket 1. After that the washer thereof and the brake shoe presser bar spring is held at the same time by an end plate 11 being built in. The end plate 11 provides a convexity 15 to engage with a bearing housing 10 and a concavity 16 with which the brake shoe presser bar 6 engages. Thus without increasing the component parts, the manhours for assembling a motor can be decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a reversible motor used as a drive source for industrial machinery and the like.

2. Description of the Related Art Conventionally, reversible motors have often been used to drive industrial machines and the like.

An example of the conventional reversible motor as described above will be described below with reference to the drawings.

FIG. 3 shows a sectional view of a conventional reversible motor. In FIG. 3, reference numeral 1 denotes a bracket, and a cylindrical bearing housing portion 10 with a bottom is provided at the center thereof. A stator 2 is fixed to the inner surface of the frame 12. 3 is a brake plate fixed to the rotating shaft 4. 5 is brake shoe,
Reference numeral 6 denotes a brake shoe presser spring for bringing the brake shoe 5 into contact with the brake plate 3, which is held together with the brake shoe 5 in a through hole 7 provided in the bracket. Reference numeral 8 denotes a bearing on the bracket side, which is installed on the inner periphery of the bearing housing section 10. A wave spring washer 9 applies preload to the bearing 8, and is interposed between the bottom of the bearing housing portion IO and the bearing 8. Reference numeral 11 denotes an end plate attached to the outer end surface of the bracket 1 in the axial direction, and restricts movement of the brake shoe presser spring 6 toward the outer side of the bracket. 13 is a frame side bearing provided on the frame 12.

The outer diameter of the brake plate 3 is larger than the inner diameter of the stator 2, and the brake mechanism is provided on the bracket side.

The operation of the reversible motor configured as described above will be described below.

The brake plate 3 is fixed to the rotating shaft 4, rotates together with the rotating shaft 4, slides on the brake pad held on the bracket 1, and generates brake torque.

The rotating shaft 4 is supported by the bracket 1 and the frame 12 by bearing links 8 and 13, and the preload generated in the thrust direction by the wave spring washer 9 prevents creep and abnormal noise at the contact area between the bearing and the housing. There is.

Problems to be Solved by the Invention However, in the above configuration, during assembly work during manufacturing, the wave spring washer 9 is placed on the end face of the bearing 8 as shown in FIG. 4, and the outer diameter of the bearing and the outer diameter of the wave spring washer are The bracket 1 must be assembled while being careful not to shift the bracket 1, resulting in a problem that the number of assembly steps is large.

Further, as shown in FIG. 5, in the configuration in which the wave spring washer 9 is provided in the bearing housing part 14 provided on the frame side, the brake plate 3 is moved in the direction opposite to the direction of the preload generated by the wave spring washer 9 by the brake presser spring 6. Since the preload applied to the bearing 8 on the bracket side is equal to the load generated by the wave spring washer 9 minus the load generated by the brake shoe presser spring 6, the preload applied to the bearing 8 on the bracket side is sufficient. In order to ensure preload, the load generated by the brake shoe presser spring 6 must be made sufficiently smaller than the load generated by the wave spring washer 9, and the brake torque is determined by the frictional force between the brake shoe 5 and the brake plate 3. Since the frictional force is proportional to the load pressing the brake shoe 5 against the brake plate 3, there is a problem in that the brake torque is extremely small.

Also, as shown in Fig. 6, the outer diameter of the brake plate 3 is set to the stator 2.
If the brake mechanism is provided on the frame 12 side, it becomes possible to assemble the bearing 13 into the bearing housing part of the frame after the wave spring washer 9 is assembled into the bearing housing part 14 of the frame, thereby reducing the number of assembly steps. However, the outer diameter of the brake plate 3 is restricted to be less than the inner diameter of the stator, and the radius of the sliding part between the brake plate 3 and the brake shoe 5 becomes smaller than in the case of FIG. Due to the nature of the braking force being proportional to the radius of the sliding portion of the brake shoe, there was a problem in that the braking torque was smaller than that in the case shown in FIG.

Means for Solving the Problems In order to solve the above problems, the present invention includes a brake plate that is larger than the inner diameter of the stator, and a bearing housing provided on the bracket is formed into a hollow cylindrical shape, and the bearing housing is fitted into the bearing housing portion. The end plate having mating convex portions is configured to hold a wave spring washer that applies preload to the bearing and a brake shoe presser spring.

Function The present invention has the above-described configuration, and incorporates a wave spring washer into the housing of the bracket from the outside of the bracket.
The end plate can hold the brake brake spring and the wave spring washer at the same time.

EXAMPLE Hereinafter, a reversible motor according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a sectional view of a reversible motor according to an embodiment of the present invention.

In FIG. 1, 1 is a bracket, 2 is a stator, and 3 is a brake plate whose outer diameter is larger than the inner diameter of the stator, which are fixed to a rotating shaft 4. 5 is a brake shoe, 6 is a brake shoe presser spring, 7 is a through hole provided on the bracket l for holding the brake shoe and the brake shoe presser spring, 8 is a bearing on the bracket side, 9 is a wave spring washer that applies preload to the bearing 8, 10 1 is a hollow cylindrical bearing housing portion provided on the bracket 1, and a bearing 8 is equipped on the inner periphery. Reference numeral 11 denotes an end plate attached to the outer end surface of the bracket 1 in the axial direction, and includes a convex portion 15 that fits into the bearing housing portion 10 and a concave portion 16 into which the brake shoe presser spring 6 fits.
is provided.

Regarding the reversible motor configured as above, the following is as follows.
The assembly workability and brake characteristics will be explained using FIGS. 1 and 2. FIG. 2 shows an assembly method of the embodiment shown in FIG. 1. After assembling the bracket 1, the wave spring washer 9 is assembled into the bearing housing part 10 from the outside of the bracket 1, and then the end plate 11 is assembled. , and the brake shoe presser spring 6 at the same time.

Here, the end plate 11 is provided with a convex part 15 that fits into the bearing housing part 10 and a recess part 16 into which the brake shoe presser spring 6 is fitted, in order to improve the assembly workability. The workability is not inferior in any way to the case where only the shoe presser spring is held and assembled.

Therefore, place a wave spring washer 9 on the end face of the conventional bearing 8, align the outer diameter of the spring washer with the outer diameter of the bearing, and place the bracket 1 while being careful not to shift the spring washer outer diameter.
The number of assembly steps is significantly reduced compared to the work of incorporating the

Effects of the Invention As described above, the present invention provides a hollow brake plate in which a brake plate having an outer diameter larger than the inner diameter of the stator is fixed to a rotating shaft, and a bracket is provided with a bearing that supports the rotating shaft and a wave spring washer that applies preload to the bearing. It is installed in a cylindrical bearing housing, and a brake presser spring and a wave spring washer are held by an end plate attached to the outer end surface of the bracket. By providing a convex portion that fits on the inner periphery, it is possible to reduce the number of man-hours for assembling the motor without increasing the number of parts, even though the brake torque is large.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a reversible motor according to an embodiment of the present invention, FIG. 2 is a sectional view showing the assembly procedure of the reversible motor of FIG. 1, and FIGS. 3, 5, and 6 are conventional FIG. 4 is a sectional view showing the assembly procedure of the reversible motor shown in FIG. 3. 1... Bracket, 3... Brake plate, 5... Brake shoe, 6... Brake shoe presser spring, 7... Through hole , 8...
・Bearing, 9... Wave spring washer, 10
... Bearing housing part, 11 ... End plate, 15 ... Convex part, 16 ... Concave part. Name of agent: Patent attorney Toshio Nakao and 1 other person...Furake Soto 3...Ruki Hashi 5...Fishyoshi Eng 51. , vertical spring 9... wave spring 2 Vya Fig. 1 ff... 15... convex notice ■ /6. Concave part! ,...

Claims (1)

[Claims] A brake plate fixed to a rotating shaft and having an outer diameter larger than an inner diameter of a stator, a brake shoe that slides on the brake plate, a brake shoe presser spring that presses the brake shoe against the brake plate, and a brake shoe presser that presses the brake shoe against the brake plate. and a hollow cylindrical bearing housing portion that has a through hole that holds a brake brake retaining spring and that supports a bearing that supports the rotating shaft and a wave spring washer that applies preload to the bearing; an end plate that is attached to the outer end surface and restricts movement of the brake shoe presser spring and the wave spring washer in the outer direction of the bracket; the end plate is provided with a recess into which the brake shoe presser spring fits; and the bearing housing A reversible motor with a convex part that fits into the inner circumference of the part.