JPH03169237A - Bearing device of commutator motor - Google Patents

Abstract

PURPOSE:To improve the shock resistance of a motor by separating it into a brush holder body and a thrust receiving body, and providing a bearing installation part on either of both bodies, and besides interposing a press spring between both bodies coaxially. CONSTITUTION:A brush holder body 17 is constituted by integrally forming a brush holder part 17a, a projection 17a, which is to abut on the root of the spring part 14a of a press spring 14, and a coupling part 17f, to which a thrust receiving body 18 is fixed by calking. The thrust receiving body 18 is composed of a bearing base 15 and a bearing supporting plate 16, and is fixed by setting itself to the end face of a motor case and calking the case end. The bearing base 15 is metallic end is composed of a bearing installation part 15a, a press spring holding part 15b, a thrust receiving part 15c, and a coupling part 15b, and is fixed by calking the coupling part 15d to the bearing base supporting plate 16.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a bearing device for a commutator motor.

[Prior Art] A conventional bearing device for a commutator motor includes a bearing that rotatably supports a rotor shaft, a bearing mounting portion that is fitted and fixed to an end face of a motor case, and a bearing mounting portion that holds the bearing. Susis 1
- A base having a base having a slug 1 for holding temporary parts, a receiving part, a brush holder part for guiding a brush that feeds electricity to a commutator, and a presser spring that presses a bearing was generally used.

The base is integrally molded from electrically insulating plastic, and the presser spring has a chrysanthemum-shaped spring portion and a flange whose circumference is narrowed, and the flange is pressed into the recess of the base. It is fixed by a person or by caulking the base after attaching a pressure person.

(Problem to be Solved by the Invention) In the bearing device for the commutator motor as described above, the base is made of an integral piece of electrically insulating plastic, so the flange of the presser spring is pressed into the recess of the base. Even if it is fixed or fixed by caulking the base after press-fitting, there is a problem that the strength varies widely and the shock resistance of the motor is weak.Furthermore, if a part of the plan holder and the first sleeve mounting part are integrated, U
- Because of the brush holder, the distance between the opposing brush holder parts is limited by the outer diameter of the presser spring, and the brush holder part cannot be brought close to the small diameter commutator, making it impossible to effectively use the printing length, and the output side There is a problem in that the bearing and presser spring of the bearing device cannot be used.

The present invention has been made in view of the above circumstances, and its purpose is to provide a bearing device for a commutator motor that can improve the impact resistance of the motor, extend its life, and allow parts to be shared. be.

[Means to solve the problem]

In order to achieve the above objectives, the commutator moke bearing device of the present invention includes a bearing that rotatably supports a rotor shaft;
It is fitted and fixed to the end face of the case, and includes a bearing mounting part that holds the bearing, a slab 1, a slab 1 that holds the plate, and a bearing mounting part that holds the bearing.
A bearing device for a commutator motor comprising a base having a receiving part and a brush holder part that guides a brush that supplies power to a commutator, and a presser spring that presses the bearing against a bearing mounting part. Separate the holder body into the solid holder body which has a holder part and fits into the end face of the gauge, and the bush holder body which has a slus 1/receiver tJ part, and attach it to either of the two main bodies. A bearing mounting portion is provided at LJ, and a presser spring is concentrically sandwiched between both bodies.

(Function) L
Since the base of the spring portion of the presser spring is in contact with one of the members, it is possible to prevent the presser spring from shifting or falling off.

Since the presser spring and bearing are inserted into the brush holder body and the slus 1 and receiver (11i1 of the main body), the distance between the brush holder parts is not limited by the outer diameter of the presser spring, making it suitable for small-diameter commutators. The brush holder part can be placed close to each other, and it can also be used in common with the bearing of the output side bearing device and the presser spring.

[Embodiment] Hereinafter, a first embodiment of the present invention will be described based on FIGS. 1 to 3.

4 The commutator bearing device includes a brush holder main body 17,
Slash l/receiver body 18, support holder 11, slus 1 plate 13,
The presser spring 14 is published by the main structure or department.

The brush holder main body 17 is shown in FIG. 3, and is made of electrically insulating plastic. 7
a, a convex portion 17b that comes into contact with the root of the spring portion 16a of the presser spring l4, and a slug 1/receiver body 18, which will be described later.
The connecting portion 17C, which is fixed by caulking, is integrally formed. The thrust 1/receiver body 18 is composed of a bearing pedestal 15 and a bearing pedestal support plate 16, and is fitted onto the end face of the motor case and fixed by caulking the end of the case. Bearing stand 15
is made of metal, and includes a bearing mounting part 15a and a presser spring holding part 1.
5l), a slusl l/receiving part 15c, and a connecting part 15d, and the connecting part 15d is connected to 8. Bearing stand support plate 16 mentioned above
It is fixed by caulking. The bearing stand support plate 16 is provided with engaging portions 16a and 16b for fixing the plush holder main body 17 and the bearing stand l5.

Slus I-1i13 is made of steel plate material and is attached to the receiving part 155C of the thrust 1, and the bearing l1 is attached to the outer spherical surface part 11a to the receiving part 155.
r'' 6, each Jq. Retained. Presser spring 14
The spring part 14a is pressed against the bearing Pi}1 surface part 1]a, the collar part 14b is pressed and the spring holding part 15b6 is press-fitted and fixed, and the root of the spring part 14a is pressed against the flan holder main body 17.
By fixing the thrust receiver body 18, it is brought into contact with the convex portion 17b of the flan holder body 17.

There is a small motor with a small bearing device built into it.

The motor includes a cylindrical motor case 20 with a bottom, a bearing 11,
Output side bearing assembly 7 consisting of a presser spring 14 and a bearing stand 25
1 is fixed to the bottom and the permanent magnet 21 is fixed to the inside of the motor gate 20, and the rotor 22 whose output side is supported by the bearing I1 is inserted into the XJI, and the commutator 26 side of the rotor 22 is fixed to the Supporting bearing 11 and other parts of the flush holder 1.
1a] After the bearing device described in 17I is fitted, a brush 7-27 that can be slid freely on the flasoholter part 1 7 2] and a brush presser spring 2 that presses the printing end 27 against the commutator 26 are installed.
8, and a terminal 296 for connecting the brush holder 28 to the receiving LJ exterior 1 is attached.

Next, a second embodiment will be explained based on FIG. 4.

In this embodiment, the bearing mounting part 28a, the presser spring holding part 28
b, Thrust receiving part 2 8 c, Plan holder body 1
It consists of a slab 1 and a receiving body 28 integrally formed by drawing a metal plate material 7 and a fixed sliding engagement part 28d. This improves tillability and reduces costs by reducing the number of parts.

Next, a third embodiment will be described based on FIG. 5.

The brush holder main body 17 is made of electrically insulating plastic and is integrally formed with a support receiving saving part 17d, a presser spring holding part 17e, a brush holder part 17a, and a connecting part 17C to which the thrust receiving main body 38 is fixed by caulking. It will be done. The slusl/receiver body 38 integrates the slusl I receiving part 38a, the convex part 38b that contacts the base of the spring part 14a of the presser spring 14, and the brush polder main body 17 and a fixed sliding engagement part 38c. It looks impressive.

〔Effect of the invention〕

In the commutator motor bearing device of the present invention, the brush holder body and the thrust 1/reflector body are fixed to each other, and one of the members is in contact with the base of the spring part of the presser spring, so that the position of the presser spring is It can prevent shifting and falling off, and since the presser spring and bearing are inserted between the brush holder body and the Sushi I Tatami body, the distance between the brush holder parts is {Limited to diameter L
The brush holder part can be brought close to a commutator with a small diameter, and can also be used in common with the bearing of the bearing device on the output side and the presser spring.

As a result, it is possible to increase the motor's impact resistance by +r1], extend the life of the motor, and make it possible to share parts.

[Brief explanation of the drawing]

1 shows a first embodiment of the present invention, (a) is a sectional view, (b) is a plan view, FIG. 2 is a partial sectional view of the same built into a motor, and FIG. 8 also shows the base, (a) is a cross-sectional view, (b) is a plan view, 8 Figure 4 is a cross-sectional view showing the second embodiment of the wooden invention, and Figure 5 is: This shows a third embodiment of the present invention, (a) is a sectional view, (b) is a plan view, 11 bearing, 13 thrust plate, 14 holding spring, 15 bearing stand, 15a bearing mounting part, 151 ) Presser spring holding part 15c Slus 1/receiving part, 16 Bearing stand support plate, plan holder body, Slus l/receiving body.

Claims (1)

[Claims] (1) A bearing that rotatably supports the rotor shaft, and is fitted and fixed to the end face of the case, and supplies power to the bearing mounting part that holds the bearing, the thrust receiving part that holds the thrust plate, and the commutator. A bearing device for a commutator motor comprising a base having a brush holder portion for guiding a brush to be moved, and a presser spring for pressing the bearing against a bearing mounting portion. The brush holder body is separated into a brush holder body that fits into the brush holder body, and the thrust receiver body that has a thrust receiving part and fixes the brush holder body.A bearing mounting part is provided on either of the two bodies, and a pressing spring is placed concentrically between the two bodies. A bearing device for a commutator motor, which is characterized by being clamped in place.