JP4570396B2 - Cooling port mounting member and blower motor equipped with the cooling port mounting member - Google Patents

Description

  According to the present invention, a rotor in which a fan is fixed to an end of a rotating shaft is rotatably provided via the rotating shaft with respect to a yoke housing in which a cooling port for introducing outside air is formed on a peripheral wall surface. The present invention relates to a cooling port mounting member mounted on a blower motor that blows air from the fan by rotating the rotor, and a blower motor including the cooling port mounting member.

FIG. 4 is a view showing a blower motor used in a general vehicle air conditioner. The blower motor 1 includes a yoke housing 2 having a substantially cylindrical shape, a pair of permanent magnets 3 fixed to an inner peripheral wall surface of the yoke housing 2, and a rotor that is rotatably provided at the center of the yoke housing 2 via a rotation shaft 8. includes a 4, a brush box 6 for power supply to the coil 5 provided in the rotor 4, the power sale end frame 7 covering the opening 2a of the yoke housing 2, and a fan 9 which is fixed to the end of the rotary shaft 8 ing.

  The rotor 4 includes an electronic machine core 10 in which thin iron plates are laminated and a coil 5 wound around the electronic machine core 10, and a commutator 12 for energizing the coil 5 is provided on the rotating shaft 8. It has been. The brush box 6 is provided in a pair with the rotary shaft 8 in between. A brush 13 that is urged in the direction of the rotary shaft 8 and press-contacts the commutator 12 is accommodated in the brush box 6. The current supplied to the brush box 6 flows through the coil 5 via the brush 13 and the commutator 12.

  Bearing portions 14 and 15 that rotatably support the rotary shaft 8 are formed at the center of the end frame 7 and the center of the yoke housing 2, and the end portion of the rotary shaft 8 passes through the end frame 7. A through hole 7a is formed. The fan 9 is fixed to the end of the rotating shaft 8 that protrudes outside the end frame 7 from the through hole 7a.

  When a current flows through the coil 5 of the rotor 4, the rotor 4 rotates under the influence of the magnetic field generated by the pair of permanent magnets 3, and the fan 9 that is fixed to the end of the rotating shaft 8 as the rotor 4 rotates. Rotation starts to blow.

A cooling port 17 having a rectangular shape when viewed from the front is formed in the lower portion of the peripheral surface of the yoke housing 2 in order to suppress a temperature rise in the yoke housing 2 due to the rotation of the rotor 4. As shown, a rubber plug 18 in which a lattice-like opening 18a is formed is fitted. When the rotor 4 rotates, external intake air is introduced into the yoke housing 2 through the lattice-like openings 18a, and the blower motor 1 is cooled. (For example, refer to Patent Document 1).
JP-A-5-308753

  However, in the conventional rubber plug 18, foreign matter may enter the yoke housing through the lattice-shaped openings 18 a, leading to poor contact between the brush 13 and the commutator 12, and malfunction of the blower motor 1 may occur. There was a problem.

  The present invention has been made in view of the above problems, and provides a cooling port mounting member capable of preventing malfunction of the blower motor due to entry of foreign matter from the cooling port, and a blower motor provided with the cooling port mounting member. This is the issue.

In order to solve the above problem , the invention according to claim 1
In the blower motor in which the rotor is rotatably installed in the yoke housing, and the rotor is rotated so that air is blown by a fan fixed to the end of the rotating shaft of the rotor.
A cooling port for introducing outside air is formed in the peripheral wall surface of the yoke housing, and a cooling port mounting member mounted on the cooling port,
A mounting base having an engaging portion detachably engaged with an opening edge of the cooling port;
A communication portion standing on the mounting base and having a communication hole communicating with the opening;
A filter mounting portion fixed to the end of the communication portion and attaching a filter to the communication opening of the communication hole ;
The inner wall surface of the communication hole is characterized by a cooling port mounting member provided with an inclined surface that gradually narrows the inside of the communication portion toward the opening of the cooling port.

The invention according to claim 2 is characterized in that the inclined surface provided on the inner wall surface of the communication hole defines a cooling port mounting member that defines an introduction direction of the outside air introduced into the yoke housing. Yes. Furthermore, the invention according to claim 3 is characterized in that the filter mounting portion has a mounting base portion in which the communication opening of the communication hole is formed, and a filter fixing frame for sandwiching the filter by a peripheral edge portion of the communication opening. the the mounting base portion and the filter fixing frame, between the one end portion is connected swingably, the cooling opening attachment member and lockable locking portion and the engaged portion is provided to each other between the other end It is a feature.

  In addition, the present invention is a blower motor including the cooling port mounting member described above.

  According to the present invention, since a filter is attached to the communication opening, foreign matter is less likely to enter the yoke housing through the communication opening, and malfunction of the blower motor due to poor contact between the brush and the commutator can be prevented. It becomes possible.

  Further, the cooling port installation member is formed by pulling out the rubber plug attached to the cooling port without engaging the yoke housing itself and engaging the engaging portion of the mounting base with the side edge of the cooling port. Can be easily attached to the yoke housing.

Furthermore, since the engaging portion is detachably engaged with the cooling port, the cooling port installation member can be easily detached from the cooling port, and the cooling port installation member can be easily replaced. In addition, the inside of the communicating portion can be gradually narrowed toward the opening of the cooling port by the inclined surface provided on the inner wall surface of the communicating hole.

According to the second aspect of the present invention, the inclined surface provided on the inner wall surface of the communication hole defines the introduction direction of the outside air introduced into the yoke housing. It can be applied directly to the target location in the housing.

According to the invention of claim 3, the mounting base and the filter fixing frame, between the one end portion is connected swingably, provided with a lockable locking portion and the locked portion from each other between the other end Therefore, the filter is attached so as to cover the communication opening by sandwiching the filter between the peripheral edge of the communication opening formed in the mounting base and the filter fixing frame, so that the filter can be easily attached and detached. Become. Furthermore, by checking the filter arranged in the frame of the filter fixing frame through the frame window of the filter fixing frame, it is possible to easily check whether the filter is installed at an appropriate position and to easily clean the filter. Can be judged.

  Hereinafter, a floor motor provided with a cooling port mounting member according to the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, a blower motor 21 including a cooling port mounting member 20 includes a yoke housing 22 having a substantially cylindrical shape, a pair of permanent magnets 23 fixed to the inner peripheral wall surface of the yoke housing 22, and the yoke housing 22. a rotor 24 provided rotatably through the rotary shaft 28 in the center, the brush box 26 for energization of the coil 25 provided in the rotor 24, and covering the Hare end frame 27 an opening 22a of the yoke housing 22, And a fan 29 fixed to the end of the rotary shaft 28.

  The rotor 24 includes an electronic machine core 30 in which thin iron plates are laminated and a coil 25 wound around the electronic machine core 30, and a commutator 32 for energizing the coil 25 is provided on the rotary shaft 28. It has been. The brush box 26 is provided in a pair with the rotation shaft 28 in between. A brush 33 that is urged in the direction of the rotation shaft 28 and press-contacts the commutator 32 is accommodated in the brush box 26. The current supplied to the brush box 26 flows through the coil 25 via the brush 33 and the commutator 32.

  Bearing portions 34 and 35 for rotatably supporting the rotary shaft 28 are formed at the center of the end frame 27 and the center of the yoke housing 22, and the end frame 27 has an end portion of the rotary shaft 28. A penetrating through hole 27a is formed. The fan 29 is fixed to the end of the rotary shaft 28 that protrudes from the through hole 27 a to the outside of the end frame 27.

  When a current flows through the coil 25 of the rotor 24, the rotor 24 rotates under the influence of the magnetic field generated by the pair of permanent magnets 23, and the fan 29 fixed to the end of the rotating shaft 28 as the rotor 24 rotates. Rotation starts to blow.

  A cooling port 37 having a rectangular shape in front view is formed in the lower part of the peripheral surface of the yoke housing 22 in order to suppress a temperature rise in the yoke housing 22 due to the rotation of the rotor 24. As shown in FIG. 2, the cooling port mounting member 20 is attached to the cooling port 37.

  FIG. 3A shows a longitudinal sectional view of the cooling port mounting member 20, and FIG. 3B shows a cross section of the cooling port mounting member 20. The cooling port mounting member 20 includes a base portion 40 that is gently curved along the peripheral surface of the yoke housing 22, a cylindrical portion (communication portion) 41 erected on the base portion 40, and a box formed at the tip of the cylindrical portion 41. The opening 42 a formed on the front surface of the box portion 42 and the inside of the yoke housing 22 are communicated with each other via the cylindrical portion 41.

  The base 40 is formed with a pair of engaging projections (engaging portions) 44 and 44 that engage with the side edge of the cooling port 37, and cooling is achieved by engaging the engaging projection 44 with the side edge. The mouth mounting member 20 is locked to the cooling port 37.

A filter fixing frame 45 having a frame shape is swingably attached to the right end edge of the opening 42 a in the opening 42 a of the box portion 42. The left end of the filter fixing frame 45 is connected to the end of the box portion 42. engaged with the engaged portion 46 formed, the locking portion 47 for restricting the swinging of the filter fixing frame 45 is formed. As shown in FIGS. 3A and 3B, the filter 50 sandwiched between the edge of the opening 42 a and the filter fixing frame 45 is installed in the opening 42 a of the box portion 42.

As shown in FIG. 3A, the inner passage 51 of the cylindrical portion 41 is formed by a curved surface whose lower surface 51 a is inclined upward, and passes through the inner passage 51 from the opening 42 a of the box portion 42 to the yoke. The air introduced into the housing 22 is guided above the yoke housing 22 along the inclined lower surface 51a. Further, the inside of the inner passage 51 is gradually narrowed toward the cooling port 37 by the inclined surface provided on the lower surface 51 a of the inner passage 51.

  When the filter 50 is mounted on the box portion 42 of the cooling port mounting member 20 formed in this way and the engagement protrusion 44 is mounted on the cooling port 37 and the rotor 24 is rotated, the outside air is rotated along with the rotation of the rotor 24. Is introduced from the opening 42 a of the box portion 42 through the inner passage 51 of the cylindrical portion 41 and above the yoke housing 2. At this time, since the filter 50 is attached to the box portion 42, the filter 50 makes it difficult for foreign matter to enter the yoke housing 22. Furthermore, even when fine foreign matter is introduced into the yoke housing 22 through the filter 50, the upper portion of the yoke housing 2 is moved upward along the inclined surface (lower surface 51 a) of the inner passage 51 of the cylindrical portion 41. Since the introduced outside air is guided, foreign matter is unlikely to collect in the brush 33 and the commutator 32 installed below the yoke housing 22, and malfunction of the blower motor 21 due to poor contact between the brush 33 and the commutator 32 is prevented. Is possible.

  Further, by using the cooling port installation member 20 according to the present invention, the rubber plug 18 that has been conventionally used is pulled out with pliers or the like without special processing on the yoke housing 22 itself, and the base 40 is engaged. The cooling port installation member 37 can be attached by inserting the cooling port installation member 20 into the cooling port 37 so that the mating protrusions 44 engage with the side edges of the cooling port 37.

Also, placing the filter 50 between the opening 42a edge and the filter fixing frame 45, the filter 50 by engaging the engaging portion 47 of the filter fixing portion 45 in the engaged portion 46 of the box portion 42 is box Since the filter 42 is attached so as to cover the opening 42a of the portion 42, the filter 50 can be easily replaced. Further, by confirming the filter 50 disposed in the frame of the filter fixing frame 45 through the frame window of the filter fixing frame 45, it is possible to easily confirm whether the filter 50 is installed at an appropriate position, and to filter the filter 50. It is possible to easily determine the degree of dirt. In addition, since only the filter 50 can be removed from the cooling port installation member 20 and replaced, the cost can be reduced.

  The cooling port mounting device 20 according to the present invention is not limited to the above-described one. For example, in the above-described embodiment, the example in which the lower surface 51a of the inner passage 51 of the cylindrical portion 41 is configured by a curved surface inclined upward is shown, but the lower surface 51a of the inner passage 51 does not necessarily face upward. However, the direction in which the external air is introduced can be changed and adjusted by adjusting the inclination direction of the inner passage 51. By adjusting the inclination direction of the inner passage 51 and changing / adjusting the introduction direction of the external air, it is possible to directly apply the introduced air to a target location.

It is a fragmentary sectional view showing a blower motor provided with a cooling mouth mounting member concerning the present invention. It is an expansion perspective view which shows the cooling port mounting member attached to the cooling port of the blower motor. It is sectional drawing which shows a cooling port mounting member, Comprising: (a) shows the longitudinal cross-sectional view, (b) has shown the cross-sectional view. It is a fragmentary sectional view which shows the blower motor provided with the rubber stopper. It is an expansion perspective view which shows the rubber stopper attached to the cooling port of the blower motor.

Explanation of symbols

1, 21 Blower motor 2, 22 Yoke housing 4, 24 Rotor 9, 29 Fan 17, 37 Cooling port 20 Cooling port mounting member 40 Base (mounting base)
41 Cylindrical part (communication part)
42 Box (mounting base, filter mounting)
42a opening (communication opening)
44 Engagement protrusion (engagement part)
45 Filter fixing frame (filter fixing frame, filter mounting part)
51 Internal passage (communication hole)
51a bottom surface

Claims (4)

In the blower motor in which the rotor is rotatably installed in the yoke housing, and the rotor is rotated so that air is blown by a fan fixed to the end of the rotating shaft of the rotor.
A cooling port mounting member that is formed in the peripheral wall surface of the yoke housing to introduce outside air and is mounted on the cooling port,
A mounting base having an engaging portion detachably engaged with an opening edge of the cooling port;
A communication portion standing on the mounting base and having a communication hole communicating with the opening;
A filter mounting portion fixed to the end of the communication portion and attaching a filter to the communication opening of the communication hole;
A cooling port mounting member, wherein an inner wall surface of the communication hole is provided with an inclined surface that gradually narrows the inside of the communication portion toward the opening of the cooling port.   The cooling port mounting member according to claim 1, wherein the inclined surface provided on the inner wall surface of the communication hole defines an introduction direction of outside air introduced into the yoke housing. The filter mounting portion includes a mounting base portion in which a communication opening of the communication hole is formed,
A filter fixing frame that sandwiches the filter with a peripheral edge of the communication opening;
Wherein the mounting base portion and the filter fixing frame, wherein the inter-end portion is connected swingably, characterized in that the lockable engagement portion and the engaged portion is provided to each other between the other end The cooling port mounting member according to claim 1 or 2.   A blower motor comprising the cooling port mounting member according to any one of claims 1 to 3.

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