JP3892083B2 - Electric connection holding device and brush holding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electrical connection holding device and a brush holding device .
[0002]
[Prior art]
A conventional brush holder will be described with reference to FIGS. 8, 9 and 10. FIG. In FIG. 8, the motor power supply lead wire 19 is connected so as to be electrically connected to the brush inside the motor, and the lead wire 19 is taken out to the outside through the lead rubber 20. 9 and 10, the power feeding terminal 21 is taken out through a hole provided in the motor casing 23 through a bushing 22 that is an insulator, and then covered with a seal or another casing 24.
[0003]
[Problems to be solved by the invention]
However, the above conventional configuration has various problems. In the structure of FIG. 8, in order to ensure the waterproof performance, it is necessary to perform sealing at two places, that is, the gap between the motor power supply lead wire and the lead rubber and the gap between the lead rubber and the hole provided in the motor casing. Furthermore, it is necessary to connect the motor power supply lead wire and the brush in a limited space inside the motor, and there is a problem of the strength of the connection part when the motor power supply lead wire is pulled from the outside. It requires a lead wire for power supply that can withstand internal high temperatures, and also requires a process for connecting various types of lead wires for motor power supply in the motor in advance, which hinders automatic assembly. Had problems. The structure shown in FIGS. 9 and 10 has a problem of how to fix and position the power supply terminal, which must be connected in a narrow space in order to connect the power supply terminal and the brush inside the motor. is doing. Further, there is a problem that the connection between the power supply lead wire and the terminal is unstable.
[0004]
The present invention solves the above-mentioned conventional problems at a stretch, and an object thereof is to provide an inexpensive motor that is more reliable than the conventional one.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, an electrical connection holding device of the present invention includes a plate-like connection terminal provided in a conductive portion, a lead wire connected to the tip of the plate-like terminal, and an insulating support that supports the conductive portion. The plate-like connecting terminal is inserted into a groove-like opening formed in the insulating support and the tip is twisted, so that the lead wire can be connected outside the insulating support, and the lead wire is dropped off. Can be prevented.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
An electrical connection holding device of the present invention has a space for slidably storing a brush that contacts a commutator of an electric motor, and has a plate-like two power supply terminals on a side surface, and the power supply A lead wire connected to the tip of each of the terminals for use, and an insulating support having a groove-like opening into which the power supply terminal is inserted on the side surface of the brush box, and the connection terminal in the groove-like opening. Is inserted, and the tip of the connection terminal is twisted and fixed to the insulating support, and the lead wire is connected to each of the tips. Further, the brush holding device of the present invention has a space for slidably storing a brush that contacts the commutator of the electric motor, and has a brush box provided with two plate-like power supply terminals on the side surface, A lead wire connected to the tip of each power supply terminal; and an insulating support having a groove-like opening into which the power supply terminal is inserted on a side surface of the brush box, and the connection to the groove-like opening. the fixed to an insulating support pin is inserted by twisting the tip of the connection terminal has a configuration in which the lead wire is connected across each of the tip. Thus, by inserting the plate-like connection terminal into the groove-shaped opening formed in the insulating support and twisting the tip, the lead wire can be connected outside the insulating support, and the plate-like power supply The terminal can be attached to the insulating support.
[0007]
Further, by providing a notch in the plate-like connection terminal, the plate-like power feeding terminal can be easily twisted.
[0008]
Further, by providing a convex portion on the plate-like flat surface on the conductive portion side from the portion penetrating the groove-like opening, when the sealing material is filled, the sealing material can be prevented from entering the motor.
[0009]
Has a space for accommodating the brush in contact with the commutator of the electric motive slidably, a brush box having a plate-like power supply terminal on the side surface, and a lead wire that connects to the distal end of the plate-like feeding terminal, An insulating support having a groove-like opening into which the plate-like power feeding terminal is inserted on a side surface of the brush box, and inserting the plate-like connection terminal into the groove-like opening to twist the tip. Lead wires can be connected outside the support, and a plate-like power feeding terminal can be attached to the insulating support.
[0010]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
[0011]
FIG. 1 is a half sectional view of a motor provided with a brush holding device according to the present invention. Reference numeral 1 denotes a power supply terminal, which is formed integrally with a brush box 3 that houses the brush 2. The motor power supply terminal 1 is filled with a sealing material 16 from the outside in order to ensure water resistance. It is desirable that the brush 2 slides stably on a commutator 7 formed on the armature 6 of the motor 5, but for this purpose, the brush box 3 is securely fixed to the insulating support 4 that holds it. Need to be done.
[0012]
The details of the present invention will be described with reference to FIG. 2 which is an enlarged view of a part A of FIG. In FIG. 2, a narrow groove-like opening 8 is formed in the insulating support 4 that holds the brush box 3, and the brush box 3 is fitted in the narrow groove-like opening 8 and formed in a plate shape 2. The power supply terminals 1 are integrally formed. Further, when the power supply terminal 1 passes through the narrow groove opening 8 and takes out the power supply terminal 1 to the outside, it is narrower than both sides of the power supply terminal 1 at a position that matches the outer end surface 9 of the narrow groove opening 8. A notch portion 11 having a flat portion 10 parallel to the outer end surface 9 of the groove-shaped opening 8 is formed. The two power supply terminals 1 pass through the narrow groove-shaped opening 8 and are taken out to the outside. Then, as shown in FIG. 3A and FIG. It is fixed by twisting at the part 11. Therefore, it is fixed to the single brush box 3 by the two power supply terminals 1, and the stability is greatly improved as compared with the case where the single brush box 3 is fixed by the single terminal. Further, the notch 11 of the power feeding terminal 1 is formed in a shape having a flat portion 10 parallel to the outer end face 9 at a position matching the outer end face 9 of the narrow groove-shaped opening 8. It is firmly fixed between the flat portion 10 and the outer end face 9. After that, as shown in FIG. 4A and FIG. 4B, the power supply lead wire 12 is connected and soldered to the power supply terminal 1. At this time, the power supply lead wire 12 has two power supply terminals. Since it is a process of soldering over the terminals 13 and 14, the workability of the soldering process is greatly improved, and at the same time, the tensile strength of the lead wire 12 after soldering is greatly improved and the solder failure is greatly reduced. Reduction can be realized.
[0013]
Further, as shown in FIG. 4B, one tip 13 of the power feeding terminal is formed in a substantially U shape with an opening dimension of about 1.6 to 2.4 mm, and the other tip vicinity portion 14 has a diameter. A through hole of 1.4 mm to 2.2 mm is formed. Due to the shape, it is possible to reliably prevent the lead wires 12 from coming off during the soldering process of the power supply lead wires.
[0014]
In addition, although it does not specifically limit about the substantially U shape formed in the terminal 1 for electric power feeding, and the dimension and shape of a through-hole, In the experiment which the inventors conducted, about the through-hole formed in one side Is φ1.4 to φ2.2 mm in the round hole shape 17 as shown in FIG. 5 (a), and further in a substantially triangular shape 18 as shown in FIG. Thus, by forming a regular triangle having a side length of 2.2 mm, the lead wire 12 can be prevented from coming off well even when there are several types of outer diameters of the lead wires 12 to be connected.
[0015]
Further, FIG. 6 shows a configuration in which the shape of the tip formed on the other side of the power feeding terminal 1 is substantially U-shaped. As shown in FIG. 7 (C-C cross-sectional view in FIG. 2), the feeding terminal portion 1 fitted to the narrow groove-shaped opening 8 has a step height of 0.15 to a plate thickness of 0.5 mm. Protrusions 15 having a width of 0.4 mm and a width of 50 to 80% of the terminal width, that is, 3 mm with respect to the terminal width of 5 mm are formed. Protruding part 15 has the effect of preventing the penetration of sealing material 16 into the motor and ensuring smooth insertion after insertion into narrow groove-like opening 8 and the stability after insertion, by making it an appropriate size and shape as described above. .
[0016]
【The invention's effect】
As is clear from the above description, the present invention can easily connect the lead wires outside the support body, so that the workability of the lead wire connecting process can be improved and the lead wires can be prevented from falling off. .
[0017]
In addition, by providing a convex portion on the plate-like power feeding terminal, when the sealing material is filled in the convex groove opening, the sealing material can be prevented from entering the motor.
[Brief description of the drawings]
FIG. 1 is a half sectional view of a motor in one embodiment of the present invention. FIG. 2 is an enlarged sectional view of part A in FIG. 1. FIG. 3 (a) is a view taken along arrow XX in FIG. XX arrow view [FIG. 4] (a) Top view of lead wire fixing in one embodiment of the present invention (b) Perspective view of lead wire fixing in one embodiment of the present invention [FIG. 5] (a) Power supply (B) Power supply terminal shape diagram [FIG. 6] Power supply terminal shape diagram [FIG. 7] CC cross-sectional view of power supply terminal in FIG. 2 [FIG. 8] Lead in conventional motor Cross-sectional view of the wire lead-out portion [FIG. 9] Cross-sectional view of the power supply terminal connection portion in the conventional motor [FIG. 10] Perspective view of the power supply terminal connection portion in the conventional motor
DESCRIPTION OF SYMBOLS 1 Feeding terminal 3 Brush box 4 Insulating support 5 Motor 7 Commutator 8 Narrow groove-shaped opening 11 Notch part of feeding terminal 12 Lead wire 15 Minute convex part of feeding terminal

Claims (4)

A brush box having a space for slidably storing a brush that contacts a commutator of an electric motor and having two plate-like power supply terminals on a side surface, and a tip connected to each of the power supply terminals A lead wire and an insulating support having a groove-like opening into which the power feeding terminal is inserted on a side surface of the brush box, and the connection terminal is inserted into the groove-like opening, and the tip of the connection terminal An electrical connection holding device having a configuration in which the lead wire is connected to each of the tip ends by twisting and fixing to the insulating support . Has a space for slidably accommodating the brush in contact with the motor commutator, and a brush box with two power supply terminals of the plate on the side surface, the tip of each of the previous SL feeding collector terminal and a lead wire for connecting, an insulating support which is pre-Symbol supply electric terminal has a groove-like opening to be inserted into a side of the brush box, the groove-like opening before Kise' connection terminal is inserted Te said fixed to an insulating support the tip of the connection terminal I twist, brush holding device having a structure in which the lead wire to each of the tip is connected across. The brush holding device according to claim 2 , wherein a cutout portion is provided on a side surface of the plate-like connection terminal. The brush holding device according to claim 2 , wherein a convex portion is provided on a plate-like plane closer to the conductive portion than a portion penetrating the groove-like opening.

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