JPH0570171U - Brush for motor - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The head of the brush is further protected by fitting a hard cap through the elastic body to the head of the brush divided into two parts. Prevents motor failure due to peeling or damage of the protective cap ,. A support plate, which is composed of an elastic body fitted into the head portion of the brush divided into two parts, and a ceramics cap attached to the upper surface of the elastic body, the elastic body contacting the head end surface of the brush, and On the back surface of the ceramic cap, there is a sandwiching plate that hangs down from both ends in the width direction of the support plate so as to straddle both sides of the brush, and a projecting ridge projecting on a side opposite to the hanging direction of the sandwiching plate. Has a concave groove into which the ridge portion of the elastic body is fitted. As a result, severe vibration due to rotation of the motor
Not only can it be absorbed and stabilized even when it is shocked, but it also has excellent wear resistance and can be used for a long time without being damaged.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 SUMMARY OF THE INVENTION The present invention relates to an improvement of a motor brush, and it is an object of the present invention to further sufficiently protect the head portion of the brush divided into two parts and prevent the motor from being damaged due to peeling or damage of the protective cap.

[0002]

[Prior Art]

 As a means for protecting the head portion of a conventionally known two-part motor brush, an appropriate protective member is attached to the brush head portion with an adhesive, or the most recent one is a two-layer hard plastic. There is known a clip which is formed in a U shape with a rubber or the like sandwiched therebetween, and in which a U-shaped opening having a narrower gap is press-fitted into the brush head (JP-A-64). -144 No. 1).

[0003]

[Problems to be solved by the device]

 However, when the motor is driven, the brush is subjected to more severe vibration and shock than expected, so the protective member peels off, the cap with the brush head fitted is accidentally removed, or the cap itself is removed. In many cases, it will be damaged and will cause trouble to the motor.

[0004]

[Means for Solving the Problems]

 Therefore, the present invention solves the above-mentioned problems in the prior art, makes it difficult for the cap to come off from the brush head portion, and particularly makes the cap itself robust. Specifically, it is a brush head divided into two. And a ceramics cap attached to the upper surface of the elastic body. The elastic body is a support plate that abuts against the head end surface of the brush and brushes from both ends in the width direction of the support plate. It has a sandwiching plate that hangs down across both sides, and a ridge that protrudes from the side opposite to the hanging down direction of the sandwiching plate.On the back surface of the ceramics cap, the ridge of the elastic body is provided. The present invention relates to a motor brush having a groove into which a part is fitted.

[0005]

[Action]

 The convex groove on one side of the elastic body is fitted and integrated with the concave groove formed on the back side of the ceramics cap with an adhesive, and then the same adhesive is applied on the back side of the elastic body and inside the hanging parts on both sides. Then, this is fitted into the head part of the brush divided into two parts, and after this is attached to the electrode part of the motor, the lead wire is connected to complete the attachment.

[0006]

【Example】

 The specific contents of the present invention will be described below with reference to the illustrated embodiment. 1 is a ceramic, 3 is an elastic body, and 6 is a brush divided into two parts. The ceramics 1 has a substantially semi-cylindrical shape as a whole, the front surface is curved, and a concave groove 2 is formed continuously in the longitudinal direction at the center of the back surface.

Further, the elastic body 3 is made of a material having high strength such as rubber or polyamide woven cloth and having a certain degree of shock absorption, and is supported by abutting against the head end surface of the brush. The plate 3a, and the holding plates 4 and 4 hung so as to straddle both sides of the support plate 3a in the width direction to both side faces of the brush, and the protrusions provided on the side faces opposite to the hanging direction of the holding plates 4 and 4. The above-mentioned ceramic 1 has the groove 2 and the ridge 5 having a size corresponding to the groove 2. A lead wire 7 is attached to the brush 6 for each of the two divided brushes.

Further, as shown in FIGS. 2 and 3, the head portion of each of the brushes 6 and 6 is preferably provided with a recess 6 a having a depth of about 1 to 3 mm, which is provided with an elastic body 3 and a ceramic. 1 and a step portion 6b is formed also in the width direction of the portion, and the concave surface 6a and the step portion 6b are provided with the lower surface of the support plate 3a and the sandwiching plate. By fitting 4 and 4 together, the elastic body 3 and the ceramics 1 will not be displaced in the lengthwise direction and the widthwise direction of the brush 6 due to the use over time, whereby the protective cap will not move. From the above, it becomes more difficult to come off, and it is possible to more completely prevent the failure of the motor due to the damage of the protective cap.

In the above-described structure, the convex groove on one side of the elastic body 3 is fitted and integrated with the concave groove 2 formed on the back surface side of the ceramics cap 1 with an adhesive, and then the back surface of the elastic body 3 is Also, apply an adhesive to the inside of the hanging parts 4 and 4 on both sides, fit this into the head part of the brushes 6 and 6 that are divided into two parts, and then attach this to the electrode part of the motor. , The lead wires 7 and 7 are connected to complete the attachment.

[0010]

[Effect of the device]

 As described above, the present invention provides a support plate that abuts against the head end surface of a brush, a holding plate that hangs from both ends of the supporting plate in the width direction to both side surfaces of the brush, and a hanging direction of the holding plate. An elastic body having a ridge protruding on the side opposite to the above, and a ceramic cap having a concave groove on the back surface, which is attached to the upper surface of the elastic body, into which the ridge of the elastic body is fitted. Since the convex groove on one side of the elastic body is fitted and integrated with the concave groove formed on the back side of the ceramics cap with an adhesive, it is subjected to severe vibration and shock due to rotation of the motor. However, not only can it be sufficiently absorbed and stabilized, but it also has excellent wear resistance, resulting in long-term use with little risk of wear or damage, and damage to the protective cap. By You that there is no failure of the motor. Further, the processing is simpler than that of the conventional product, and the manufacturing cost can be halved.

Further, a concave portion is formed in the head portion of the brush to which the protective cap is attached, by an amount corresponding to the length of the elastic body and the ceramics, and a step portion is further formed in the width direction of the elastic portion. When the lower surface of the support plate and the left and right sandwiching plates are fitted to the step and the stepped portion, the protective cap can be used in the length direction and the width direction of the brush even when used over time. Since the protective cap does not dislocate to any of the brushes 6, it becomes more difficult to separate the protective cap from the brush 6, and it is possible to more completely prevent a motor failure due to damage of the protective cap. ..

[Brief description of drawings]

FIG. 1 is an enlarged perspective view of a protection member showing an embodiment of a motor brush according to an embodiment of the present invention.

FIG. 2 is a side view showing a state where the protection member of FIG. 1 is attached to a head end surface of a brush.

FIG. 3 is a perspective view showing a state of the motor brush shown in FIG. 2 immediately before a protective cap is attached to the brush.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ceramics cap 2 Recessed groove 3 Elastic body 3a Support plate 4 Hanging part 5 Convex strip 6 Brush 6a Recess 6b Step 7 Lead wire

Claims (1)

[Scope of utility model registration request] 1. A support plate comprising an elastic body fitted to the head portion of the brush divided into two parts, and a ceramics cap attached to the upper surface of the elastic body, the elastic body being in contact with the head end surface of the brush. And a back surface of the ceramic cap, which has a sandwiching plate hung so as to straddle both ends of the support plate in the width direction to both side surfaces of the brush, and a projecting ridge projecting from a side surface opposite to the suspending direction of the sandwiching plate. A brush for a motor having a recessed groove into which the protrusion of the elastic body is fitted.