JPS60213246A - Brush for commutator of motor and manufacture thereof - Google Patents

Abstract

PURPOSE:To enhance the heat resistance and the wear resistance by coating an elastic member with a mixture of conductive metallic powder and thermosetting resin, and thermally curing, thereby forming a brush unit. CONSTITUTION:Thermosetting resin such as epoxy resin and the like and conductive metallic powder such as copper or the like are mixed and kneaded at a ratio in response to the utility of a brush 6 for a commutator of a motor, thereby attaining a coating material. This is coated partly on an elastic member 1 such as a leaf spring made of a conductive material such as beryllium steel or the like in a thin film state by a coating unit 2. Subsequently, it is thermally cured at the temperature in response to the resin material by a heater 3 to obtain a brush blank 4 for a commutator. This blank 4 is formed in the prescribed brush shape by a press 5, thereby manufacturing the brush 6 for the commutator partly having a brush unit.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention particularly relates to a commutator brush for a small motor,
The present invention relates to a method for manufacturing commutator brushes.

(Prior art) Conventionally, powder-molded carbon brushes have mostly been used as commutator brushes for motors, but there is a limit to the formability of carbon brushes due to their thickness, so they must be made extremely thin. Therefore, it may not be possible to use it for small motors etc. due to its size and installation space, and it has disadvantages such as increased cost.

Therefore, in the past, simple metal spring brushes were used for small motors, not only for low voltage small motors such as toy motors, but also for high voltage electrical equipment such as hair dryers, which are becoming increasingly smaller these days. Metal spring brushes are also used in motors due to their size and installation space.

However, metal spring brushes are sufficient for low-voltage toy motors, etc., but due to their low heat resistance P1 and -JC properties, they are prone to severe burnout when used in high-voltage motors.
It had drawbacks such as not being able to withstand long-term use.

(Second aspect of the invention) The first aspect of the present invention is as follows.
The purpose of this product is to provide a commutator side brush that has excellent wear resistance and is ideal for use in small motors.The second purpose of Amatsuma 1 is to easily manufacture such brushes for commutator f. An object of the present invention is to provide a method for manufacturing a rectifier brush.

(Structure of the Invention) The rectifying f-river brush of the motor according to the present invention includes a mixture of J0 conductive metal powder and thermosetting resin in an elastic member made of conductive wire, plate spring material, etc. “Pr Ili”
It is characterized in that the brush portion is formed by thermosetting the thermosetting resin and thermosetting the motor. '+' according to the purpose of the rectifier r- brush:
Mixing and kneading was performed to obtain a coating material, and this was applied in a dusk shape by printing or other means to a part of an elastic member made of a conductive leaf spring material, etc. After that, a 1 nt material was coated. A feature is that a brush portion is formed in a part of the elastic member by heating and curing at a temperature depending on the properties, thereby forming a rectifying hand brush material, and processing this into a predetermined brush shape.

(Embodiment) An embodiment of the rectified f-river motor and the manufacturing method thereof according to the present invention will be described based on the drawings, but for convenience, the explanation will be given from "2. Manufacturing υ".

Epoxy-based 1111 shade thermosetting resin, #l, silver,
A coating material '1' is obtained by mixing and kneading conductive metal powder such as lead or gold in a proportion depending on the application of the brush for adjusting IJtr of a motor. In order to prevent sintering, it is preferable to mix carbon powder into the metal powder described in 1- above. This is titanium D1 with beryllium removed. A plate spring-like member made of a conductive material such as phosphor bronze or an elastic member such as a wire rod is coated in a dusk pattern by a coating IH4 device 2 such as printing or coating, and then heated by a heating device 3.
The brush material 4 for rectified rivers is heated and cured at a temperature that corresponds to the properties of the resin phase 1, and this is formed into a predetermined brush shape using a press 5, thereby forming part of the brush F.
A rectifying r-river rake 6 is manufactured that controls m6a.

In the illustrated example, a temporary spring-like member 71 is used as the valve-arranging member l.
(It is rolled into a roll, and part of it is continuously coated with R + 4 material in the form of a medium-9 coat by the coating device 2 described in 14, and this is sent to the heating device 3 where it is continuously heated. In this case, since the coating material 45 is applied to the leaf spring member, the coating film J7 has a thickness of lOμ to 1,0
It is possible to form a coating film of up to 0.00Ji. Paint 1 formed in this way
1'' The membrane 1a has excellent heat resistance and ml friction properties, as well as extremely high bondability with the elastic member 1. This is continuously punched and formed into a Jyi constant brush shape using a press machine M5 to form the commutator side brush 6 11). In the illustrated example, this commutator-side brush 6 has a notch 6 in order to improve the springiness.
b is formed, and a tapping hole 6C is punched out at the same time.

FIG. 5 shows an example of use, where 7 is the commutator of the motor, and the arrow 1< indicates its rotation direction.

Example 1 A mixed powder consisting of 70% by weight of copper powder and 30% by weight of carbon powder was combined, and 23% by weight of liquid epoxy resin was added to 77% by weight of this mixed powder and mixed and stirred to form a coating material. (II, this is plate thickness 0, 1 intestine, llI25
A coating of 18 nmli and 100 μ thick was printed on one side of the +w layer of beryllium copper plate material using a printing device.
Subsequently, the applied part was dried by heating at about 200°C for 60 minutes using a heating device to obtain a rectifying hand brush material 4 as shown in FIG. 2. This was shaped as shown in FIG. A large number of commutator side brushes 6 were manufactured by punching and punching them.These were used as commutator brushes in a small motor with a C, 9V power supply as shown in Fig. 5, and were used continuously. It showed a durable life of 300 hours.

(Effects of the Invention) According to the motor commutator side brush according to the present invention, a mixture of conductive metal powder and thermosetting resin is added to the elastic member made of conductive wire, plate spring material, etc. Since the brush part is formed on an elastic member by applying it in a curtain shape and curing it with heat, the brush part has extremely high heat resistance and wear resistance, and the brush part may burn out unnecessarily. There is no risk of this, and the bondability with spring members such as leaf springs is good, making it ideal as a commutator brush for not only small low-voltage motors but also small high-voltage motors. Also, depending on the purpose of the motor, etc., an elastic member of any thickness is used to form a brush portion of any thickness, and the shape and shape of the elastic member are
Since the size etc. can be set arbitrarily, it is easy to incorporate it as a rectifying single-stream brush for a small motor, and the cost can be significantly reduced.

According to the method for manufacturing a rectifying single-river brush for a motor according to the present invention, a coating material is prepared by mixing and kneading a thermosetting resin and a conductive metal powder in a ratio depending on the application of the rectifying single-river brush for a motor. This is applied to a part of an elastic member made of a conductive plate spring material or the like by printing or other means, and then heated and cured with a hot nail depending on the properties of the resin material. A brush part is formed on a part of the elastic member to be used as a commutator brush material, and this is processed into a predetermined brush shape, so an ultra-thin brush part is formed on the conductive elastic member. Moreover, the brush portion has excellent heat resistance and IIIJyP abrasion resistance. Furthermore, the bondability to the elastic member is extremely good, and there is no risk of peeling or the like occurring during processing or the like. In addition, a long rectifying prephasing brush material can be obtained by continuously applying a coating material to the elongated spring-side member by printing or other coating means, and by continuously heat-treating the material. By continuously molding this into a predetermined shape by pressing or the like, homogeneous products can be mass-produced.

Incidentally, by winding a long commutator brush material into a roll shape, it is convenient to store and transport the material, and it can be processed to obtain a product as required.

[Brief explanation of drawings]

The drawings show an embodiment of the commutating single-river brush for a motor and its manufacturing method according to the present invention, FIG. 1 is an example of the arrangement of equipment used to carry out the manufacturing method, and FIG. 2 is a plan view of the commutator brush material. FIG. 3 is a plan view showing the state of punching, FIG. 4 is a plan view of a commutator brush (product), and FIG. 5 is a perspective view showing an example of use. 1: Elastic member, 2: Application device, 3: Heating device 4: Rectification prephasing brush material, 5 Nibbles device 6: Rectification 1 river brush,
7: Commutator Figure 1 B ( Figure 2 Figure 3 14'''''' Figure 5

Claims (1)

[Scope of Claims] 1. A brush portion in which a mixture of conductive metal powder and thermosetting resin is coated in a thin film shape on an elastic member made of conductive wire, plate spring material, etc. and thermosetted. A commutator brush for a motor, characterized in that it is formed with. 2. A coating material is obtained by mixing and kneading thermosetting resin and conductive metal powder in a proportion appropriate to the intended use of motor commutator brushes. A brush portion is formed on a portion of the elastic member by applying it in a dusk shape by printing or other means and then heating and curing it at a temperature depending on the properties of the resin material! i+
! A method for manufacturing a brush for a commutator of a motor, characterized by using a material for a Rukogawa brush and processing it into a predetermined brush shape.