JP2000023435A - Bruehless motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a brushless motor which can improve the efficiency of attaching of a joint bar to an electric circuit board on which electric circuit parts are mounted and a drive circuit is formed and for which the electrical connection between a stator coil and the joint bar can be performed on the soldering surface side of the circuit board and loss of electrical connection between the joint bar and drive circuit by the vibration transmitted to the joint bar from a stator side can be inhibited. SOLUTION: Lands for rivets having rivet inserting holes are formed on an electric circuit board 30. A fixing member for a joint bar 40 is arranged on the soldering surface 30b of the circuit board 30 by aligning its attaching holes with the rivet inserting holes and fixed to the above-mentioned lands with rivets which are inserted into the attaching holes and rivet inserting holes and caulked from the soldering surface 30b side. Then the electrical junction with the coil 5 of a stator 6 is provided on the erected member of the joint bar 34 arranged on the soldering surface 30b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a brushless motor.

[0002]

2. Description of the Related Art FIG. 15 is a sectional view showing a main part of an electric circuit of a conventional brushless motor, and FIG. 16 is a side view showing a part A in FIG.

In this conventional brushless motor, FIG.
5, the component surface a1 of the electric circuit board a as shown in FIG.
In addition, a switching element b for switching the current direction of the current flowing through the stator coil and an electric circuit component such as an electrolytic capacitor c are mounted on the electric circuit board a provided with a predetermined wiring pattern. A drive circuit for switching the current direction of the motor shaft to rotate the motor shaft is formed. In order to electrically connect this drive circuit to the coils of the stator, the component surface a1 of the electric circuit board a is formed.
Is attached with a metal joint bar d.

[0004] This joint bar d is used for transmitting the vibration of the second member d2 to the first member d1 when the first member d1 and the second member d2 arranged in parallel are connected at one end to each other. The first member d1 is soldered to the electric circuit board a and connected to the driving circuit, and the second member d2 penetrates the electric circuit board a to form a component surface a1. The opposite end of the second circuit member d2 that protrudes toward the solder surface a2 of the electric circuit board a and that protrudes toward the solder surface a2 serves as a coil connection portion d3 that is electrically connected to the coil.

For this reason, in this brushless motor, electric connection between the coil connection portion d3 of the joint bar d and the coil side of the stator is performed by mounting electric circuit components such as a switching element b and an electrolytic capacitor c. It can be performed on the solder surface a2 side of the electric circuit board a, and the vibration transmitted from the stator side to the second member d2 of the joint bar d is transmitted from the second member d2 to the first member d1. To prevent the first member d1 of the joint bar d
It is also possible to prevent the electrical connection between the motor and the drive circuit from coming off due to the vibration.

[0006]

On the component side a1 of the electric circuit board a, electric circuit components such as a switching element b and an electrolytic capacitor c are mounted, and the switching element b radiates heat generated by the electric circuit components. An aluminum heat sink e provided with a radiation fin e1 is held.

For this reason, conventional brushless motors include:
When attaching the joint bar d to the electric circuit board a, electric circuit components such as the switching element b and the electrolytic capacitor c and the heat sink e hinder the work efficiency of attaching the joint bar d to the electric circuit board a. There is a problem.

Therefore, according to the present invention, it is possible to improve the work efficiency of the work of attaching the joint bar to the electric circuit board, as compared with the conventional product. A brushless motor that can make electrical connection on the solder surface side of the electric circuit board and can also prevent disconnection of the electrical connection between the joint bar and the drive circuit due to vibration transmitted from the stator side to the joint bar. The task is to provide.

[0009]

According to a first aspect of the present invention, an electric circuit component is mounted on a component surface of an electric circuit board and provided with a predetermined wiring pattern. A drive circuit is formed on the circuit board to rotate the motor shaft by switching the direction of the current flowing through the coil of the stator, and a metal joint bar fixed to the electric circuit board and electrically connected to the drive circuit is provided. A brushless motor including a coil connection portion electrically connected to the coil, wherein a rivet land having a rivet insertion hole for inserting a rivet is formed on the electric circuit board; Is
A fixing member having a mounting hole into which a rivet is inserted, and an erect member provided with the connecting portion provided upright from the fixing member. A fixing member arranged on the solder surface of the electric circuit board is inserted into the mounting hole and the rivet insertion hole from the solder surface in a state where the upright member is arranged on the solder surface side, and caulked from the solder surface side. The rivet is fixed to the rivet land by a rivet.

Therefore, according to the first aspect of the present invention, a joint bar arranged from the solder surface side is provided on the solder surface opposite to the component surface of the electric circuit board on which the electric circuit components for the drive circuit are mounted. Fix the rivet from the solder side,
The joint bar can be electrically connected to the drive circuit.

When the joint bar is fixed to the electric circuit board by soldering, when the vibration transmitted from the stator to the joint bar is transmitted to the solder fixing portion between the joint bar and the electric circuit board, the joint bar and the electric circuit are fixed. There is a possibility that the connection between the joint bar and the drive circuit may be disconnected due to the loosening of the fixing to the substrate by the solder due to the vibration.

On the other hand, according to the first aspect of the present invention, since the joint bar is rivet-fixed to the electric circuit board, the rivet does not come off due to the vibration transmitted from the stator side to the standing member of the joint bar.

According to a second aspect of the present invention, in the brushless motor according to the first aspect, a positioning projection is formed on the fixed member so as to project to a side opposite to the upright member, and the positioning projection is formed of the electric motor. It is characterized in that it is inserted into a positioning projection insertion hole formed in the circuit board.

According to the second aspect of the present invention, the positioning projection formed on the fixing member is inserted into the positioning projection insertion hole formed on the electric circuit board, so that the positioning projection is formed in the rivet insertion hole of the electric circuit board. The joint bar can be arranged on the solder surface of the electric circuit board by matching the mounting holes of the fixing member.

In addition, according to the second aspect of the present invention, the vibration transmitted from the stator side to the upright member of the joint bar causes the fixing member of the joint bar to rotate about the rivet. It can also be prevented by the positioning projection of the fixing member inserted into the insertion hole.

According to a third aspect of the present invention, an electric circuit component is mounted on a component surface of the electric circuit board, and a direction of a current flowing through a coil of a stator is switched to the electric circuit board having a predetermined wiring pattern. A drive circuit for rotating a motor shaft is formed, and a metal joint bar fixed to an electric circuit board and electrically connected to the drive circuit includes a connection portion for a coil electrically connected to the coil. A brushless motor, wherein the joint bar is connected to one end of a first member and a second member arranged in parallel, and is connected to the other end of the second member. A vibration damping structure for preventing vibration from being transmitted to the first member is provided, and the mounting protrusion provided on the first member is provided in a mounting protrusion insertion hole formed in the electric circuit board, and Electric circuit on the other side Is inserted from the solder side of the plate,
In a state where at least the connection portion is arranged on the solder surface side, the connection portion is fixed to the mounting projection land of the electric circuit board having the mounting projection insertion hole by soldering.

According to the third aspect of the present invention, the mounting projection provided on the first member of the joint bar is inserted into the mounting projection insertion hole formed in the electric circuit board from the solder surface side of the electric circuit board. Since the solder is fixed to the mounting projection land of the electric circuit board having the mounting projection insertion hole, the solder on the side opposite to the component surface of the electric circuit board on which the electric circuit component for the drive circuit is mounted is mounted. The joint bar can be arranged on the surface from the solder surface side and fixed by soldering, and the joint bar can be electrically connected to the drive circuit.

According to the third aspect of the present invention, the joint bar has one end connected to the first member and the second member arranged in parallel, and the other end of the second member vibrates at the first end. A vibration isolating structure for preventing transmission to members is provided.
Since the other end of the member is provided with a coil connection portion that is electrically connected to the coil of the stator, the vibration transmitted from the stator to the second member is transmitted from the second member to the first member. Can be prevented.

According to a fourth aspect of the present invention, there is provided the brushless motor according to the third aspect, wherein the mounting projection gradually projects from a surface of the mounting projection toward a base from a tip side of the mounting projection. When the mounting projection is inserted into the mounting projection insertion hole, a resilient piece is provided which is displaced toward the front side of the mounting projection, and when completed, resiliently returns to the initial position and temporarily fixes the joint bar to the electric circuit board. It is characterized by having.

According to the fourth aspect of the present invention, the resilient piece provided on the mounting projection of the joint bar is displaced toward the surface of the mounting projection when the mounting projection is inserted into the mounting projection insertion hole.
When the insertion is completed, the joint bar returns to the initial position and temporarily fixes the joint bar to the electric circuit board.When soldering the joint bar to the electric circuit board, attach the joint bar from the solder surface side of the electric circuit board. By inserting the protrusion into the mounting protrusion insertion hole of the electric circuit board, the joint bar can be temporarily fixed to the electric circuit board.

[0021]

According to the first aspect of the present invention, the joint bar arranged from the solder surface side is provided on the solder surface opposite to the component surface of the electric circuit board on which the electric circuit components for the drive circuit are mounted. Since the joint bar can be electrically connected to the drive circuit by fixing the rivet from the solder surface side, the joint bar can be attached to the electric circuit board without being disturbed by the electric circuit components.
The work efficiency of the work of attaching the joint bar to the electric circuit board can be improved.

Further, according to the first aspect of the present invention, the fixing member of the joint bar is rivet-fixed to the electric circuit board in a state where the upright member of the joint bar is arranged on the solder surface side of the electric circuit board. Since the connection portion for the coil electrically connected to the coil is provided, the electrical connection between the coil side of the stator and the joint bar can also be performed on the solder surface side of the electric circuit board.

According to the first aspect of the present invention, since the joint bar is riveted to the electric circuit board, the rivet does not come off due to the vibration transmitted from the stator to the upright member of the joint bar. The disconnection of the electrical connection between the joint bar and the drive circuit can also be prevented.

According to the second aspect of the present invention, the positioning protrusion formed on the fixing member is inserted into the positioning protrusion insertion hole formed on the electric circuit board, so that the fixing member is inserted into the rivet insertion hole of the electric circuit board. The joint bar can be arranged on the solder surface of the electric circuit board by matching the mounting holes, so that the joint bar can be easily arranged on the solder surface of the electric circuit board, and the work of attaching the joint bar to the electric circuit board Work efficiency can be further improved.

In addition, according to the second aspect of the present invention, the rotation of the fixing member of the joint bar about the rivet by the vibration transmitted from the stator side to the upright member of the joint bar is determined by the positioning protrusion of the electric circuit board. Since it can also be prevented by the positioning projection of the fixing member inserted into the insertion hole, the disconnection of the electrical connection between the joint bar and the drive circuit due to the vibration can be more reliably prevented.

According to the third aspect of the present invention, the joint bar is arranged from the solder surface side on the solder surface opposite to the component surface of the electric circuit board on which the electric circuit components for the drive circuit are mounted, and is fixed by soldering. Since the joint bar can be electrically connected to the drive circuit, the joint bar can be attached to the electric circuit board without being disturbed by the electric circuit components. The work efficiency of the mounting work can be improved.

Further, according to the third aspect of the present invention, the connection portion for the coil, which is electrically connected to the coil of the stator, is provided on the other end of the second member of the joint bar, and is connected to the solder surface of the electric circuit board. Therefore, the electrical connection between the coil side of the stator and the joint bar can be made on the solder surface side of the electric circuit board.

According to the third aspect of the invention, the vibration transmitted from the stator side to the second member of the joint bar is the second vibration.
Since the transmission from the member to the first member can be prevented, the fixing of the joint projection of the first member of the joint bar and the land for the attachment projection of the electric circuit board by the solder is loosened by the vibration. By preventing the vibration, the disconnection of the electrical connection between the joint bar and the drive circuit due to the vibration can be prevented.

According to the fourth aspect of the present invention, when the joint bar is soldered to the electric circuit board, the mounting protrusion of the joint bar is inserted into the mounting protrusion insertion hole of the electric circuit board from the solder surface side of the electric circuit board. As a result, the joint bar can be temporarily fixed to the electric circuit board, so that the soldering of the joint bar to the electric circuit board is easy, and the work efficiency of attaching the joint bar to the electric circuit board is further improved. Can be.

[0030]

(First Embodiment) FIG. 1 is a cutaway sectional view showing a first embodiment which is an example of an embodiment in which the first and second aspects of the present invention are combined. The brassless motor 1 is used as a blower fan motor of a vehicle air conditioner, and includes a housing 4 that rotatably supports a motor shaft 3 via a bearing 2.
A stator 6 having a coil 5 is provided, and a ferrite magnet 7 arranged close to the stator 6 is fixed to the motor shaft 3 via a yoke 8.

A sirocco fan 10 for blowing air is attached to the tip of the motor shaft 3.
A sensor magnet 11 indicating the rotational position of the ferrite magnet 7 is attached to the rear end of the motor shaft 3. The flange 4a provided at the rear end of the motor shaft 3 of the housing 4 has
The circuit protection case 20 is mounted with the ring-shaped mounting bracket 12 and the vibration isolating rubber 13 interposed.

The circuit protection case 20 is composed of an upper case 21 located on the front end side of the motor shaft 3 and a lower case 22 located on the rear end side of the motor shaft 3.
A drive circuit for rotating the motor shaft 3 by switching the direction of the current flowing through the coil 5 of the stator 6 is housed in the circuit protection case 20.

This drive circuit comprises a switching element 3 for switching the direction of the current flowing through the coil 5 of the stator 6.
1 and an electric circuit component such as an electrolytic capacitor 32 are mounted on the component surface 30a of the electric circuit board 30, and are formed on the electric circuit board 30 having a predetermined wiring pattern.

The electric circuit board 30 includes the upper case 21
Are screwed and fixed to a boss portion 23 suspended from the top wall 21 a of the motor shaft 3, and are disposed orthogonal to the motor shaft 3. The switching element 31 is screwed and fixed to a heat sink 33 made of aluminum. The heat sink 33 exposes a radiation fin 33 a for radiating heat generated by the switching element 31 to the outside of the circuit protection case 20, and a top wall 21 a of the upper case 21. Attached to.

A metal joint bar 40 is fixed to a solder surface 30b of the electric circuit board 30 opposite to the component surface 30a by a rivet 34. The joint bar 40 is electrically connected to the drive circuit. In addition to being connected, it is also electrically connected to the coil 5 of the stator 6 via a metal bus bar 35 and terminal pins 36.

FIG. 2 is an enlarged view showing a portion B in FIG.
FIG. 3 is a bottom view of what is shown in FIG. As shown in FIGS. 2 and 3, the joint bar 40 includes a plate-like fixing member 42 having a mounting hole 41 into which the rivet 34 is inserted, and a plate-like rising member 43 that rises from one end of the fixing member 42.
And a positioning projection 44 projecting from the other end of the fixing member 42 in a direction opposite to the upright member 43.

A rivet land 38 having a rivet insertion hole 37 for inserting a rivet 34 and a positioning projection insertion hole 39 for inserting a positioning projection 44 of a joint bar 40 are provided at predetermined positions in the electric circuit board 30. Is formed.

The joint bar 40 is connected to the electric circuit board 30.
The positioning projection 44 is inserted into the positioning projection insertion hole 39 of the electric circuit board 30, and the mounting hole 4 is inserted into the rivet insertion hole 37 of the electric circuit board 30.
1 and the fixing member 42 disposed on the solder surface 30b of the electric circuit board 30 is inserted into the mounting hole 41 and the rivet insertion hole 37 from the solder surface 30b side.
The solder surface 30 is formed by the rivet 34 caulked from the side b.
b.

Then, the upright member 43 rises on the solder surface 30b side of the electric circuit board 30,
The bus bar 35 is welded to the tip of the upright member 43,
The tip portion serves as a connection portion 45 for the coil 5 that is electrically connected to the coil 5 of the stator 6.

FIGS. 4A and 4B are explanatory diagrams showing fixing of the joint bar to the electric circuit board by rivets, wherein FIG. 4A shows a state immediately before fixing, and FIG. 4B shows a state immediately after fixing. As shown in FIG. 4, the rivet 34 includes a hard body 34 a for caulking disposed at the tip thereof and the hard body 34 a
Rod-shaped body 3 secured to the rivet body 34b
4c.

For this reason, in the brassless motor 1, after the rivet 34 is inserted into the mounting hole 41 of the joint bar 40 and the rivet insertion hole 37 of the electric circuit board 30 from the solder surface 30b side of the electric circuit board 30, the rivet 34 is By pulling the rod 34c from the solder surface 30b side,
By caulking the rivet body 34b from the solder surface 30b side,
Joint bar 4 is attached to solder surface 30b of electric circuit board 30.
0 can be riveted. After the rivet is fixed, the extra length of the bar 34c of the rivet 34 protruding from the rivet body 34b is cut.

In the first embodiment described above, the joint bar 40 is disposed at a predetermined position on the electric circuit board 30 from the solder surface 30b side of the electric circuit board 30, and
It is fixed by a rivet 34 attached and crimped from the 0b side.

For this reason, in the first embodiment, the electric circuit components such as the switching element 31 and the electrolytic capacitor 32 mounted on the component surface 30 a of the electric circuit board 30, the heat sink 33 for cooling the switching element 31 and the like are obstructed. The joint bar 40 is connected to the electric circuit board 30 without being
Therefore, the work efficiency of the work of attaching the joint bar 40 to the electric circuit board 30 can be improved.

In the first embodiment, the upright member 43 of the joint bar 40 provided with the connection portion 45 for the coil 5 stands on the solder surface 30b side of the electric circuit board 30. The electrical connection of the joint bar 40 with the side can also be made on the solder surface 30b side of the electric circuit board 30.

By the way, when the joint bar 40 is soldered to the electric circuit board 30, the vibration transmitted from the stator 6 to the joint bar 40 is transmitted to the solder fixing portion between the joint bar 40 and the electric circuit board 30. ,
The fixation of the joint bar 40 and the electric circuit board 30 by solder may be loosened, and the connection between the joint bar 40 and the drive circuit may be disconnected.

On the other hand, in the first embodiment, since the joint bar 40 is riveted to the electric circuit board 30, the rivet 34 does not come off due to vibration transmitted from the stator 6 to the joint bar 40. Disconnection of the electrical connection between the joint bar 40 and the drive circuit due to the vibration transmitted from the stator 6 to the joint bar 40 can be prevented.

Further, in the first embodiment, the positioning projection 44 provided on the joint bar 40 is
Is inserted into the positioning projection insertion hole 39 provided on the electric circuit board 30 so that the mounting hole 41 of the joint bar 40 is aligned with the rivet insertion hole 37 of the electric circuit board 30.
The joint bar 40 can be arranged on the solder surface 30b of the electric circuit board 30, so that the joint bar 40 can be easily arranged on the solder surface 30b of the electric circuit board 30.
The work efficiency of the work of attaching the joint bar 40 to the joint bar can be further improved.

In addition, in the first embodiment, the positioning projection 44 provided on the joint bar 40 is
Into the insertion hole 30e provided in the
0 is rivet-fixed to the electric circuit board 30, so that the joint bar 40 can be prevented from rotating around the rivet 34 due to vibration transmitted from the stator 6 to the joint bar 40. The disconnection of the electrical connection between the joint bar 40 and the drive circuit due to the vibration transmitted to the joint bar 40 can be more reliably prevented.

(Second Embodiment) FIG. 5 is a sectional view showing a second embodiment which is an example of the embodiment of the third aspect of the present invention, and FIG. 6 is a bottom view of FIG. FIG. In the following description of the second embodiment, the first embodiment will be described.
The same components as those of the embodiment are denoted by the same reference numerals,
A description overlapping with that of the embodiment will be omitted.

As shown in FIGS. 5 and 6, this metal joint bar 140 has a plate-shaped first member 141 and a plate-shaped second member 142 longer than the first member 141 arranged in parallel. And a vibration isolating structure that is connected at one end to prevent the vibration of the second member 142 from being transmitted to the first member 141.
A pair of mounting protrusions 144 protruding in a direction away from the second member 142 are formed on the mounting surface 143 on the side away from the second member 142.

The mounting protrusion insertion hole 1 into which the mounting protrusion 144 of the joint bar 140 is inserted is formed in the electric circuit board 130.
A land 132 for a mounting projection provided with 31 is formed at a predetermined position.

The joint bar 140 is connected to the electric circuit board 1
30, the mounting protrusion 144 is inserted into the mounting protrusion insertion hole 131 of the electric circuit board 130 from the solder surface 130b side, and is disposed on the electric circuit board 130 from the solder surface 130b side.
The first and second members 141 and 1 are provided on the solder surface 130b side.
42 and projecting the solder surface 13 of the electric circuit board 130.
The mounting protrusion 144 is solder-fixed to the mounting protrusion land 132 of Ob, and is electrically connected to a drive circuit formed on the electric circuit board 130.

The joint bar 140 is a connection for the coil 5 in which the tip of the second member 142 to which the bus bar 35 is welded is electrically connected to the coil 5 of the stator 6 via the bus bar 35 and the terminal pin 36. Part 145
It has been.

In the second embodiment described above, the joint bar 140 is connected to the solder surface 130 of the electric circuit board 130.
The mounting protrusion 144 is inserted into the mounting protrusion insertion hole 131 of the electric circuit board 130 from the b side, is disposed on the electric circuit board 130 from the solder surface 130b side, and is fixed to the solder surface 130b of the electric circuit board 130 by soldering. I have.

For this reason, in the second embodiment, the electric circuit components for the drive circuit such as the switching element 31 and the electrolytic capacitor 32 mounted on the component surface 130 a side of the electric circuit board 130, and the cooling element for cooling the switching element 31. The joint bar 14 is not hindered by the heat sink 33 or the like.
0 can be attached to the electric circuit board 130, so that the work efficiency of the work of attaching the joint bar 140 to the electric circuit board 130 can be improved.

In the second embodiment, the joint bar 140 is fixed to the solder surface 130b by projecting the first and second members 141 and 142 on the solder surface 130b side of the electric circuit board 130. The distal end portion of the two members 142 serves as a connection portion 145 for the coil 5. For this reason, in the second embodiment, the electric connection of the joint bar 140 with the coil 5 of the stator 6 is established by the electric circuit board 13.
It can also be performed on the side of the solder surface 130b of No. 0.

Further, in the second embodiment, the joint bar 140 is provided with an anti-vibration structure for preventing the vibration of the second member 142 from being transmitted to the first member 141. For this reason, in the second embodiment, the vibration transmitted from the stator 6 side to the second member 142 of the joint bar 140 can be prevented from being transmitted from the second member 142 to the first member 141, and the vibration can be prevented. This prevents the solder fixing between the first member 141 of the joint bar 140 and the electric circuit board 130 from becoming loose, and the joint bar 140
Disconnection of the electrical connection between the motor and the drive circuit can also be prevented.

(Third Embodiment) FIG. 7 shows a third embodiment of the present invention.
It is sectional drawing which shows 3rd Embodiment which is an example of embodiment which carried out both described inventions together. FIG. 8 is a bottom view of what is shown in FIG. 7, and FIG.
It is a line sectional view. In the following description of the third embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and the description that is the same as that of the first embodiment will be omitted.

As shown in FIGS. 7 to 9, this joint bar 240 is made of an elastic metal and has a plate-shaped first member 241 and a plate-shaped second member 242 longer than the first member 241. Are provided in parallel and connected at one end to each other to prevent the vibration of the second member 242 from being transmitted to the first member 241.

A fixing portion 244 is provided on the mounting surface 243 of the first member 241 on the side away from the second member 242, along the solder surface 230b of the electric circuit board 230. A mounting protrusion 245 protruding in a direction away from the member 242 is formed, and the mounting protrusion 245 is provided on a mounting surface 243 of the first member 241 via a fixing portion 244.

The electric circuit board 230 has the mounting projection 2
A mounting projection land 232 having a mounting projection insertion hole 231 for inserting the mounting projection 45 is formed at a predetermined position on the solder surface 230b, and a fixing part 244 of the joint bar 240 is provided for the mounting projection 245 of the electric circuit board 230. A through hole 246 facing the land 232 is formed.

The joint bar 240 has a mounting projection 245.
A repellent piece 2 gradually projecting from the surface 245a of the mounting projection 245 from the tip side to the base side of the mounting projection 245.
47, the resilient piece 247 is displaced toward the front surface 245a of the mounting protrusion 245 when the mounting protrusion 245 is inserted into the mounting protrusion insertion hole 231 of the electric circuit board 230, and the initial position when the insertion is completed. The joint bar 240 is temporarily fixed to the electric circuit board 230.

The joint bar 240 is connected to the electric circuit board 2
30, the mounting protrusion 244 is inserted into the mounting protrusion insertion hole 231 of the electric circuit board 230 from the solder surface 230b side, and is disposed on the electric circuit board 230 from the solder surface 230b.
The first and second members 241 and 241 are provided on the solder surface 230b side.
42 is projected so that the solder surface 23 of the electric circuit board 230 is
0b on the land 232 for the mounting protrusion 245.
Are soldered and electrically connected to a drive circuit formed on the electric circuit board 230.

The joint bar 240 is a connection for the coil 5 in which the end of the second member 242 to which the bus bar 35 is welded is electrically connected to the coil 5 of the stator 6 via the bus bar 35 and the terminal pin 36. Part 248
It has been.

In the third embodiment described above, the joint bar 240 is connected to the solder surface 230 of the electric circuit board 230.
The mounting protrusion 245 is inserted into the mounting protrusion insertion hole 231 of the electric circuit board 230 from the side b, is disposed on the electric circuit board 230 from the solder surface 230b side, and is fixed to the solder surface 230b of the electric circuit board 230 by soldering. I have.

For this reason, in the third embodiment, an electric circuit component for a drive circuit such as the switching element 31 and the electrolytic capacitor 32 mounted on the component surface 230a side of the electric circuit board 230, and a cooling circuit for the switching element 31 are provided. The joint bar 24 is not hindered by the heat sink 33 or the like.
0 can be attached to the electric circuit board 230, so that the work efficiency of attaching the joint bar 240 to the electric circuit board 230 can be improved.

By the way, the mounting protrusion 245 of the joint bar 240 gradually protrudes from the front surface 245a of the mounting protrusion 245 toward the base from the tip side of the mounting protrusion 245, and the mounting protrusion of the electric circuit board 230 is inserted. When the mounting protrusion 245 is inserted into the hole 231, the surface 245 of the mounting protrusion 245
A resilient piece 247 is provided, which is displaced to the side a, resiliently returns to the initial position when the insertion is completed, and temporarily fixes the joint bar 240 to the electric circuit board 230.

For this reason, in the third embodiment, when the joint bar 240 is soldered to the electric circuit board 230, the mounting projection 245 of the joint bar 240 is connected to the electric circuit board 23 from the solder surface 230 b side of the electric circuit board 230.
By inserting the joint bar 240 into the electric circuit board 230 by inserting the joint bar 240 into the electric circuit board 230 by inserting the joint bar 240 into the electric circuit board 230, the electric circuit can be easily fixed. Substrate 23
The work efficiency of attaching the joint bar 240 to the joint bar 240 can be further improved.

In the third embodiment, the joint bar 240 has a structure in which the first and second members 241 and 242 protrude toward the solder surface 230b of the electric circuit board 230, and the distal end of the second member 242 has a joint. The connecting portion 248 for the coil 5 of the bar 240 is provided. For this reason, in the third embodiment, the electrical connection of the joint bar 240 to the coil 5 of the stator 6 can also be made on the solder surface 230b side of the electric circuit board 230.

Further, in the third embodiment, the joint bar 240 has a vibration damping structure for preventing the vibration of the second member 242 from being transmitted to the first member 241. For this reason, in the third embodiment, the vibration transmitted from the stator 6 side to the second member 242 of the joint bar 240 can be prevented from being transmitted from the second member 242 to the first member 241, and the vibration can be prevented. The first of the joint bar 240
The loosening of the solder between the member 241 and the electric circuit board 230 can be prevented, and the disconnection of the electric connection between the joint bar 240 and the drive circuit due to the vibration can be prevented.

In addition, in the third embodiment, since the fixing portion 244 of the joint bar 240 is formed with the through hole 246 facing the mounting projection land 232 of the electric circuit board 230, the mounting of the electric circuit board 230 is performed. Land for projection 232
When the joint bar 240 is fixed by soldering, not only can the outer peripheral portion of the fixing portion 244 of the joint bar 240 be fixed to the mounting projection land by soldering 232, but also the through-hole 246 of the fixing portion 244 The fixing portion 244 of the joint bar 240 can be fixed to the mounting protrusion land 232, and therefore, the fixing strength of the solder fixing of the joint bar 240 to the mounting protrusion land 232 of the electric circuit board 230 can be improved. it can.

(Fourth Embodiment) FIG. 10 is a sectional view showing a fourth embodiment which is an example of an embodiment embodying the third aspect of the present invention. 11 is a bottom view of what is shown in FIG. 10, and FIG. 12 is a sectional view taken along line YY of FIG. In the following description of the fourth embodiment, the same components as those of the first embodiment will be denoted by the same reference numerals, and description that is the same as that of the first embodiment will be omitted.

As shown in FIG. 10 to FIG. 12, this metal joint bar 340 is
A plate-shaped second member 342 longer than the first member 341 is arranged in parallel and connected at one end to each other to form a second member 34.
2 is provided with an anti-vibration structure for preventing transmission of the second vibration to the first member 341.

At the tip of the first member 341, a fixing portion 343 is provided along the solder surface 330 b of the electric circuit board 330, and at the tip of the fixing portion 343, the second member 342 is provided.
A pair of mounting projections 34 protruding in the direction away from the tip of
4 are formed, and the first member 341 is provided with the mounting protrusion 344 via the fixing portion 343.

In the electric circuit board 330, the mounting protrusion insertion hole 3 for inserting the mounting protrusion 344 of the joint bar 340 is provided.
At the predetermined position, a land 332 for the mounting projection provided with the base 31 and a connecting part insertion hole 333 for inserting the first and second members 341 and 342 of the joint bar 340 from the connecting part side are formed.

The joint bar 340 is connected to the electric circuit board 3.
The connection portion of the first and second members 341 and 342 is inserted into the connection portion insertion hole 333 of the electric circuit board 330 from the solder surface 330b side of
44 is inserted into the mounting projection insertion hole 331 of the electric circuit board 330, and the tip of the second member 342 is connected to the electric circuit board 33.
0 protruding from the solder surface 330b of the electric circuit board 33.
The mounting projection 344 is soldered to the mounting projection land 332 of No. 0 and electrically connected to a drive circuit formed on the electric circuit board 330.

The bus bar 35 is welded to the joint bar 340 at the end of the second member 342 protruding from the solder surface 330 b of the electric circuit board 330, and this end is connected via the bus bar 35 and the terminal pin 36. Thus, a connection portion 345 for the coil 5 electrically connected to the coil 5 of the stator 6 is provided.

In the fourth embodiment described above, the joint bar 340 is connected to the solder surface 330 of the electric circuit board 330.
From the side b, the connecting portion of the first and second members 341 and 342 is inserted into the connecting portion insertion hole 333 of the electric circuit board 330, and the mounting protrusion 344 is connected to the electric circuit board 3.
The mounting protrusion 344 is inserted into the mounting protrusion insertion hole 331 of the electrical circuit board 330, and the mounting protrusion 344 is soldered to the mounting protrusion land 332 of the electric circuit board 330.

For this reason, in the fourth embodiment, an electric circuit component for a drive circuit such as the switching element 31 and the electrolytic capacitor 32 mounted on the component surface 330a of the electric circuit board 330, and a heat sink for cooling the switching element 31 The joint bar 340 is not disturbed by 33 or the like.
Can be attached to the electric circuit board 330, so that the work efficiency of the operation of attaching the joint bar 340 to the electric circuit board 330 can be improved.

Also, in the fourth embodiment, the joint bar 340 has a connection portion 345 for the coil 5 at the tip of the second member 342 projecting from the solder surface 330b of the electric circuit board 330. For this reason, in the fourth embodiment,
The electrical connection of the joint bar 340 to the coil 5 side of the stator 6 can also be made on the solder surface 330 b side of the electric circuit board 330.

Further, in the fourth embodiment, the joint bar 340 has a vibration-proof structure for preventing the vibration of the second member 342 from being transmitted to the first member 341. Therefore, in the fourth embodiment, it is possible to prevent the vibration transmitted from the stator 6 side to the second member 342 of the joint bar 340 from being transmitted from the second member 342 to the first member 341. This prevents the solder fixing between the first member 341 of the joint bar 340 and the electric circuit board 330 from being loosened, and the joint bar 340 due to the vibration is prevented.
Disconnection of the electrical connection between the motor and the drive circuit can also be prevented.

The joint bar 34 of the fourth embodiment
The structure of the mounting protrusion 345 of the third embodiment is the same as the structure of the mounting protrusion 245 of the joint bar 240 of the third embodiment, and the resilient piece 247 of the third embodiment is attached to the mounting protrusion 345 of the joint bar 340. Of course, it is possible to provide the joint bar 340 to the electric circuit board 330 by the resilient pieces 247 as in the third embodiment.

Further, the joint bar 34 of the fourth embodiment
It is, of course, possible to provide the through hole 246 of the third embodiment in the fixing portion 343 of No. 0. In this case, similarly to the third embodiment, the solder of the joint bar 340 to the electric circuit board 330 is formed by the through hole 246. The fixing strength of the fixing can be improved.

(Fifth Embodiment) FIG. 13 is a sectional view showing a fifth embodiment which is another example of the embodiment embodying the third aspect of the present invention, and FIG. It is a bottom view of a thing. In the following description of the fifth embodiment, the same components as those of the first embodiment are denoted by the same reference numerals, and a description that is the same as that of the first embodiment will be omitted.

As shown in FIGS. 13 and 14, this joint bar 440 is basically formed by integrally forming the joint bar 140 and the bus bar 35 of the second embodiment shown in FIGS. 5 and 6. Are the same. Therefore,
The second member 442 of the joint bar 440 is electrically connected to the coil 5 of the stator 6 via the terminal pin 36.

That is, the joint bar 440 is connected to one end of the plate-shaped first member 441 and the plate-shaped second member 442 which are arranged in parallel to each other.
An anti-vibration structure is provided for preventing the vibration of the second member from being transmitted to the first member 441, and the other end of the second member 442 is electrically connected to the coil 5 of the stator 6 via the terminal pin 36. A connection 445 for the coil 5 is provided.

A pair of mounting projections 4 projecting in the direction away from the second member 442 are provided on the mounting surface 443 of the first member 441 on the side away from one end of the second member 442.
44 are formed. On the electric circuit board 430, mounting protrusion lands 432 having mounting protrusion insertion holes 431 for inserting the mounting protrusions 444 of the joint bar 440 are formed at predetermined positions.

The second member 442 of the joint bar 440
The vibration of the stator 6 transmitted to the connection portion 445 via the terminal pin 36 is transmitted from the connection portion 445 to the first member 44.
A U-shaped anti-vibration structure is provided at two locations to prevent transmission to the coupling portion side with the second. Therefore, joint bar 4
40 has a triple anti-vibration structure for preventing the vibration transmitted to the connecting portion 445 via the terminal pin 36 from being transmitted from the connecting portion 445 to the first member 441.

The joint bar 440 is connected to the electric circuit board 4
The mounting protrusion 444 is inserted into the mounting protrusion insertion hole 431 of the electric circuit board 430 from the solder surface 430b side of the electric circuit board 430, and the first member 441 and the second member 442 are mounted on the solder surface 430b side.
In the state where is disposed, the mounting protrusion 444 is soldered to the mounting protrusion land 432 of the electric circuit board 430, and is electrically connected to the drive circuit formed on the electric circuit board 430.

In the fifth embodiment described above, the joint bar 440 is connected to the solder surface 430 of the electric circuit board 430.
The mounting protrusion 444 is inserted into the mounting protrusion insertion hole 431 of the electric circuit board 430 from the side b, and the first member 441 and the second member 442 are arranged on the solder surface 430b side. It is soldered to the surface 430b.

For this reason, in the fifth embodiment, the electric circuit components for the drive circuit such as the switching element 31 and the electrolytic capacitor 32 mounted on the component surface 430a side of the electric circuit board 430 and the cooling circuit for the switching element 31 are provided. The joint bar 44 is not hindered by the heat sink 33 or the like.
0 can be attached to the electric circuit board 430, so that the work efficiency of the work of attaching the joint bar 440 to the electric circuit board 430 can be improved.

In the fifth embodiment, the joint bar 440 has the second member 442 disposed on the solder surface 430 b side of the electric circuit board 430, and the terminal bar 36 is provided at the tip end of the second member 442. A connection portion 445 for the coil 5 that is electrically connected to the coil 5 of the stator 6 is provided. Therefore, in the fifth embodiment, the connection portion 445 of the joint bar 440 and the coil 5 side of the stator 6 are connected.
Is electrically connected to the solder surface 43 of the electric circuit board 430.
It can also be performed on the 0b side.

Further, in the fifth embodiment, the joint bar 440 prevents the vibration transmitted from the stator 6 via the terminal pin 36 to the connecting portion 445 from being transmitted from the connecting portion 445 to the first member 441. It has a triple anti-vibration structure. For this reason, in the fifth embodiment, the vibration prevents the first member 441 of the joint bar 440 from being loosened from the solder fixing between the electric circuit board 430, and the vibration causes the electric connection between the joint bar 440 and the drive circuit. Release can also be prevented.

In the second embodiment shown in FIGS. 5 and 6, the bus bar 35 is connected to the joint bar 140.
Connection work to connect to is required. On the other hand, in the fifth embodiment, the joint bar 440 is basically the same as the joint bar 140 and the bus bar 35 of the second embodiment that are integrally formed. The productivity of the brushless motor can be improved as compared with the second embodiment.

As in the case of the joint bar 440, the joint bar 40 and the bus bar 35 are integrally formed in the first embodiment shown in FIGS. It is of course possible to adopt another example. And joint bar 4
When the bus bar 35 and the 0 are integrally formed, a new effect that can improve the productivity of the brushless motor can be added to the effect of the first embodiment.

Similarly, the third one shown in FIGS.
In the embodiment, the joint bar 240 and the bus bar 35
It is of course also possible to eliminate the bus bar 35 and form another example of the third embodiment by integrally forming.
When the joint bar 240 and the bus bar 35 are integrally formed, a new effect that can improve the productivity of the brushless motor can be added to the effect of the third embodiment.

Further, in the fourth embodiment shown in FIGS. 10 to 12, the joint bar 340 and the bus bar 3
It is of course possible to eliminate the bus bar 35 and to provide another example of the fourth embodiment by integrally molding the fifth embodiment with the fifth embodiment. When the joint bar 340 and the bus bar 35 are integrally formed, the effect of the fourth embodiment is obtained.
A new effect that can improve the productivity of the brushless motor can be added.

[Brief description of the drawings]

FIG. 1 is a cutaway sectional view showing a first embodiment.

FIG. 2 is an enlarged view showing a portion B of FIG.

FIG. 3 is a bottom view of the one shown in FIG. 2;

4A and 4B are explanatory diagrams showing fixing of the joint bar to the electric circuit board by rivets, wherein FIG. 4A shows a state immediately before fixing, and FIG. 4B shows a state immediately after fixing.

FIG. 5 is a sectional view showing a second embodiment.

FIG. 6 is a bottom view of what is shown in FIG.

FIG. 7 is a sectional view showing a third embodiment.

FIG. 8 is a bottom view of what is shown in FIG.

FIG. 9 is a sectional view taken along line XX of FIG.

FIG. 10 is a sectional view showing a fourth embodiment.

FIG. 11 is a bottom view of what is shown in FIG.

FIG. 12 is a sectional view taken along line YY of FIG.

FIG. 13 is a sectional view showing a fifth embodiment.

FIG. 14 is a bottom view of what is shown in FIG.

FIG. 15 is a sectional view showing a main part of a conventional electric circuit.

FIG. 16 is a side view showing a portion A of the one shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Brushless motor 3 Motor shaft 5 Coil 6 Stator 30, 130, 230, 330, 430 Electric circuit board 30a, 130a, 230a, 330a, 430a Component surface 30b, 130b, 230b, 330b, 430b Solder surface 31 Switching element (electric circuit Parts) 32 Electrolytic capacitor (electric circuit parts) 34 Rivet 37 Rivet insertion hole 38 Rivet land 39 Positioning projection insertion hole 40, 140, 240, 340, 440 Joint bar 41 Mounting hole 42 Fixing member 43 Standing member 44 Positioning projection 45, 145, 248, 345, 445 Connection portions 131, 231, 331, 431 Mounting projection insertion holes 132, 232, 332, 432 Mounting projection lands 141, 241, 341, 441 First members 142, 242, 3 2,442 surface 247 of the second member 144,245,344,444 attaching projection 245a attachment projection Tamabachihen

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor: Adult Sano, 5-24-15 Minamidai, Nakano-ku, Tokyo Calsonic Corporation (72) Inventor: Takeshi Oba 5-24-15 Minamidai, Nakano-ku, Tokyo Calsonic Incorporated F term (reference) 5H019 AA00 AA06 AA10 BB01 BB19 CC04 DD01 EE00 EE07 EE09 FF00 FF01

Claims (4)

[Claims] A component surface (30) of an electric circuit board (30).
a) on which the electric circuit components (31, 32) are mounted, and on the electric circuit board (30) provided with a predetermined wiring pattern,
A drive circuit for rotating the motor shaft (3) by switching the current direction of the current flowing through the coil (5) of the stator (6) is formed, fixed to the electric circuit board (30), and electrically connected to the drive circuit. A metal joint bar (40) provided with a connection part (45) for the coil (5) electrically connected to the coil (5), wherein the electric circuit board (30) ), A rivet land (39) having a rivet insertion hole (37) for inserting a rivet (34) is formed, and the joint bar (40) is formed.
Comprises a fixing member (42) having a mounting hole (41) into which a rivet (34) is inserted, and a standing member (43) standing up from the fixing member (42) and provided with the connecting portion (45). And a mounting hole (41) in the rivet insertion hole (37).
The fixing member (42) arranged on the solder surface (30b) of the electric circuit board (30) on the side opposite to the component surface (30a) so that the upright member ( 43) with the rivet (34) inserted into the mounting hole (41) and the rivet insertion hole (37) from the solder surface (30b) side and crimped from the solder surface (30b) side. A brushless motor fixed to a land for use (39). 2. The brushless motor according to claim 1, wherein a positioning projection (44) is formed on the fixed member (42) so as to project to a side opposite to the upright member (43). A brushless motor characterized in that (44) is inserted into a positioning projection insertion hole (39) formed in the electric circuit board (30). 3. An electric circuit board (130, 230, 33)
0, 430) component surface (130a, 230a, 330)
a, 430a) on which the electric circuit components (31, 32) are mounted, and the electric circuit board (130, 230, 330, 430) provided with a predetermined wiring pattern, and the coil (5) of the stator (6) is mounted thereon. A drive circuit for rotating the motor shaft (3) by switching the direction of the flowing current is formed, and the electric circuit boards (130, 230, 330, 43) are formed.
0) and a metal joint bar (140, 240, 340, 44) electrically connected to the drive circuit.
0) is a connection part (145, 248, 345, 445) for the coil (5) that is electrically connected to the coil (5).
A brushless motor comprising: the joint bar (140, 240, 340, 44);
0) is the first member (141, 241, 341, 441).
And one end of the second member (142, 242, 342, 442) arranged in parallel is connected to the second member (1).
42, 242, 342, 442) provided at the other end of the connection portion (145, 248, 345, 445) is prevented from being transmitted to the first member (141, 241, 341, 441). The first member (14
1, 241, 341, 441) are provided with mounting protrusion insertion holes (131, 241, 344, 444) formed in the electric circuit board (130, 230, 330, 430). 231, 331, 431), the component surfaces (130 a, 230 a, 330 a, 430 a)
Electrical circuit board (130, 230, 330,
430) solder surfaces (130b, 230b, 330b,
430b), and the solder surface (130b,
With at least the connection portions (145, 248, 345, 445) arranged on the 230b, 330b, 430b) side, the mounting projection insertion holes (131, 231, 331, 331) are provided.
431) provided with an electric circuit board (130, 230, 33).
0, 430) mounting projection lands (132, 232, 3)
32, 432), which is fixed by soldering to the brushless motor. 4. The brushless motor according to claim 3, wherein the mounting protrusion (245) has a surface (245a) of the mounting protrusion (245) from a tip side to a base side of the mounting protrusion (245). ), Gradually displaces toward the surface (245a) of the mounting protrusion (245) when the mounting protrusion (245) is inserted into the mounting protrusion insertion hole (231), and resiliently moves to the initial position when the insertion is completed. Return to the joint bar (24
0) is temporarily fixed to the electric circuit board (230).
47) The brushless motor characterized in that the brushless motor is provided.