JPH043572Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a commutator motor used in vacuum cleaners and the like.

[Conventional technology]

Conventionally, the brush device is installed by inserting it from the radial direction into a substantially cylindrical frame housing a stator to which a terminal block made of synthetic resin is attached, and which is equipped with a brush device to which a terminal connection fitting is attached.
With this installation, the terminal connection fitting of the brush device is connected to the connection terminal to which the brush device side terminal of the stator winding attached to the terminal block is connected, thereby automating the assembly of the commutator. An electric motor is known from Japanese Patent Publication No. 58-42702.

In the conventional commutator motor disclosed in this publication, connection terminals are attached to a synthetic resin terminal block attached to the stator, and the cylindrical female connection part of this terminal is attached along the radial direction of the frame. arranged together,
The structure is such that the male portion of the terminal connection fitting of the brush device is inserted into this connection portion. The terminal block is made of synthetic resin, has a U-shaped cross section, and is fitted into the fitting groove of the stator.

[Problem that the invention attempts to solve]

However, when connecting the terminal connecting fitting and the connecting terminal due to insertion of the brush device along the radial direction, the connecting terminal is pushed along the radial direction toward the axis of the frame by the male part, so synthetic resin There is a strong tendency for the terminal block to elastically deform and escape toward the axis. Therefore, even if the terminal connection fittings are accurately positioned with respect to the connection terminals, there is a problem in that these connections may not be made smoothly due to the escape of the terminal block to which the connection terminals are fixed.

[Means for solving problems]

In the present invention, a locking convex portion is integrally provided inwardly protruding near the brush mounting hole on a frame to which a brush device is attached in a radially removable manner, and the brush device is attached to a stator housed in the frame. A locking portion is integrally provided in the terminal block made of synthetic resin in the vicinity of a terminal fixing portion that fixes a connecting terminal to be connected to a terminal connecting fitting provided in the brush device,
This locking portion is configured to lock onto or be brought close to the locking convex portion.

[Effect]

The commutator motor of the present invention has a structure in which the frame and the vicinity of the terminal fixing part of the terminal block are connected through the locking between the locking protrusion and the locking part, so the brush device is attached in the radial direction of the frame. When automatically assembled by inserting along the terminal, the terminal fixing part of the terminal block to which the connecting terminal is fixed is prevented from escaping in the direction of the frame axis by the engagement between the above-mentioned locking protrusion and the locking part. be able to. That is, since the connecting terminal can be fixedly held in a predetermined position, the terminal connecting fitting of the brush device can be smoothly connected to the connecting terminal, and automatic assembly can be improved.

〔Example〕

An example of a commutator motor for a vacuum cleaner shown in the drawings will be described below.

In the figure, reference numeral 1 denotes a substantially cylindrical frame, with a bearing 2 attached to one closed end, and a bearing holder 4 with a bearing 3 attached to the other open end. Note that a fan cover (not shown) is fitted onto the edge 5 of the opening. A rotor shaft 7 of the rotor 6 is supported across the bearings 2 and 3, and a fan (not shown) is attached to the end of the shaft 7 that passes through the bearing 3. A commutator 8 is attached to the side.

A stator 9 is housed in the frame 1 surrounding a rotor 6. Needless to say, the stator 9 is formed by attaching a pair of stator windings 11 to a stator core 10. An annular terminal block 12 is attached to the end face of the stator 9 on the bearing 2 side. The terminal block 12 is made of an insulating synthetic resin integrally molded product, and a power supply connection terminal 13 is attached to the corner of the terminal block 12, as shown in FIGS. 3 and 4. These connection terminals 13 are connected to the stator windings 11, respectively.
In addition, as shown in FIG. 2, a capacitor lead wire 16 and a power supply lead wire 17 connected to a capacitor 15 attached to the outer surface of the frame 1 are connected to each connection terminal 13, respectively. has been done.

The frame 1 is provided with a pair of brush device mounting holes 18, and a pair of brush devices 19 are respectively attached by being inserted through the holes 18 so as to be removable from the frame 1 in the radial direction. Note that 20 in FIGS. 1 and 2 is a removable mounting screw.

Furthermore, the frame 1 is provided with a locking convex portion 21 near the stator 9 side of the brush mounting hole 18 . The locking convex portion 21 is protruded inward from the frame 1 by a process such as bulging or cutting and raising.

A pair of terminal fixing parts 22 are integrally protruded from the terminal block 12, and connecting terminals 23 for a brush device are attached to each of these parts. Each connection terminal 2
3 are connected to the brush device side terminals 24 of the stator winding 11, respectively. In this embodiment, the connection terminal 23 is formed into a substantially L-shape with a piece-shaped connection portion extending along the radial direction of the frame 1 and facing the brush device mounting hole 18 .

A locking portion 25 is integrally provided on the terminal block 12 in the vicinity of the terminal fixing portion 22 thereof.
As shown in FIG. 3, the locking portion 25 has, for example, a substantially fan shape, and its tip is close to the inner surface of the frame 1.
It is locked by the locking convex portion 21 . In addition, 26
indicates a reinforcing edge that prevents deformation of the locking portion 25.

Further, in the case of this embodiment, the brush device 19 is
A brush holder 29 made of an insulating material has a metal cylindrical portion 27 attached thereto and has a through hole 28 substantially parallel to the cylindrical portion 27, and a brush 30 having a pigtail 30a and housed in the cylindrical portion 27. , a terminal connection fitting 31, and a brush pressing spring 32 housed in the cylindrical portion 27.

The terminal connection fitting 31 is detachably attached to the brush holder 29 from the rear of the holder 29 located outside the frame 1, and is attached to the cylindrical portion 2.
a spring receiving part 33 that is located on the opposite side of the commutator 7 and supports the spring 32; and a terminal engaging part 34 that is integrally connected to this receiving part 32 and is located in the through hole 28 so as to be elastically deformable. It is formed into a substantially L shape. In FIG. 1, reference numeral 35 denotes a press-contact convex portion formed integrally with this metal fitting 31 if necessary, in order to more securely hold the terminal connecting metal fitting 31 on the brush holder 29, and 36 denotes a through-hole of the terminal engaging portion 34. Hole 28
A cut-and-raised cut-out for the stopper formed on the protruding portion from the opening allows it to be engaged with and detached from the edge of the through-hole 28 on the commutator 8 side.

The connection portion of the connection terminal 23 is inserted into the through hole 28 of the brush device 19 having the above configuration, and this portion is connected to the inner surface of the through hole 28 and the terminal engaging portion 3.
4 by the elastic force of the terminal engaging portion 34.

In the commutator motor having the above structure, the brush device 19 is attached to the stator assembly consisting of the stator 9, the terminal block 12, the connecting terminals 13 and 23, and the frame 1 in which the rotor 6 is built, using an automatic machine. To install, the brush device 19 may be inserted into the brush mounting hole 18 of the frame 1 from the radial direction with respect to the frame 1 and fixed with the mounting screw 20.

By inserting the brush device 19 as described above, the connection portion of the connection terminal 23 for the brush device is connected to the through hole 28.
It is smoothly inserted into the terminal and is held between the inner surface of the through hole 28 and the terminal engaging part 34 of the terminal connecting fitting 31 by the elastic force of the terminal engaging part 34. In other words, this allows connection terminal 2 to be connected without using lead wires or the like.
3 and the terminal connection fitting 31 are electrically and mechanically connected. Of course, it goes without saying that the brush 30 guided to the cylindrical portion 27 at the same time by the above attachment is pressed against the commutator 8 by the brush pressing spring 32.

In the above automatic assembly, when the connection portion of the connection terminal 23 is inserted into the through hole 28,
Since the connecting terminal 23 and the terminal fixing portion 22 are inserted into the through hole 28 while contacting the terminal engaging portion 34, the connecting terminal 23 and the terminal fixing portion 22 are subjected to a force directed in the axial direction of the frame 1 as shown by the arrow in FIG. However, regardless of such acting force, since the locking part 25 of the terminal block 12 is locked to the locking convex part 21 of the frame 1, this catch causes the terminal fixing part 22 to move in the direction of the arrow above. You can prevent them from escaping. Therefore, the connection terminal 23
Since the connecting terminal 23 is securely held in a predetermined position without escaping, the connecting terminal 23 can be smoothly inserted into the through hole 28 and connected to the terminal engaging portion 34, and automatic assembly can be improved. .

Although the above-described embodiment is configured as described above, the present invention is not limited to implementation in a commutator motor for a vacuum cleaner. In addition, in the above embodiment, the locking convex portion and the locking portion are configured to be locked in advance, but they are placed close together so that when the terminal fixing portion tries to escape even slightly in the axial direction of the frame, There is no problem with the structure being locked. The terminal connecting fitting may have a structure that does not include a spring receiving part, and the terminal engaging part may have a structure that fits into the connecting terminal without being elastically deformed.

In addition, when implementing the present invention, unless it is contrary to the gist of the invention, the frame, locking protrusion, stator,
The specific structure, shape, position, material, etc. of the terminal block, terminal fixing part, locking part, connection terminal, brush device, terminal connection fitting, etc. are not limited to the one embodiment described above, and may be modified in various ways. Of course, it can be configured and implemented.

[Effect of idea]

According to the present invention, which has the gist of the structure described in the above-mentioned utility model registration claims, the terminal fixing portion of the terminal block to which the connection terminal for the brush device is attached escapes when the brush device is inserted into the frame. This can improve the automatic assembly of the brush device to the frame.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which FIG. 1 is an enlarged sectional view of the brush device mounting part, FIG. 2 is a side view of the whole with a part cut away, and FIG. 3 is a bottom view of the stator assembly. FIG. 4 is a side view of the stator assembly. DESCRIPTION OF SYMBOLS 1... Frame, 9... Stator, 11... Stator winding, 12... Terminal block, 18... Brush mounting hole, 19... Brush device, 21... Locking protrusion, 2
2...Terminal fixing part, 23...Connection terminal, 24...
Terminal of the stator winding on the brush device side, 25...Locking portion, 31...Terminal connection fitting.

Claims (1)

[Scope of Claim for Utility Model Registration] The brush device is inserted from the radial direction into a substantially cylindrical frame housing a stator to which a terminal block made of synthetic resin is attached and which is equipped with a brush device to which a terminal connection fitting is attached. In the commutator motor, the terminal connection fitting of the brush device is connected to the connection terminal to which the brush device side terminal of the stator winding attached to the terminal block is connected. A locking convex portion is provided inwardly protruding near the brush mounting hole provided on the terminal block, and a locking portion is integrally provided on the terminal block near the terminal fixing portion for fixing the connection terminal. A commutator motor characterized in that a locking portion is locked to or close to the locking convex portion.