WO2001037401A1

WO2001037401A1 - Brushless motor

Info

Publication number: WO2001037401A1
Application number: PCT/JP2000/007742
Authority: WO
Inventors: Osamu Takahashi; Mitsuji Sekiya; Fuh Umegaki
Original assignee: Zexel Valeo Climate Control Corporation
Priority date: 1999-11-15
Filing date: 2000-11-02
Publication date: 2001-05-25
Also published as: JP2001145299A

Abstract

A brushless motor used, e.g., as a blower motor for vehicle air-conditioning systems. The brushless motor has a holding member (16) holding a rotor (1) and a stator (2). The holding member (16) is held by a flange member (19) through vibration damping members (26, 27) having a plurality of ribs (33). The ribs (33) are radially convexedly formed with respect to the center of rotation of the rotor (1) in such a manner that for the directions of forward and reverse rotation of the rotor (1), they easily tilt but for the other directions, they are less likely to tilt. Since the direction of vibrations produced in the rotor (1) and stator (2) during rotation coincides with the direction of rotation, the vibration damping members (26, 27) are rendered as if softened by the ease with which the ribs (33) tilt, thus damping the vibrations. Against vibrations from outside, the ribs (33) are less likelyto tilt as they are given the strength to 'keep their feet'. Therefore, the rotor (1) and stator (2) are less likely to vibrate and their anti-vibration property is improved.

Description

Memorandum Brushless Mo Technical Field

The present invention relates to a brushless motor used as a blower motor of a vehicle air conditioning system. Background art

As is well known, in a brushless motor used for a blower of a vehicle air conditioning system, a rotor having a permanent magnet and a stay having an armature winding are connected to a bottom surface of a blower case through a holding means. It is held on a flange member to be formed. The rotor has a centrifugal fan such as a sirocco fan, and the commutation of the armature winding is controlled by driving means including a commutating circuit, whereby the rotor, that is, the fan is driven to rotate. During the rotation of the rotor, torque ripple occurs due to commutation, and the rotor rotates with vibration. Since the night of the stay receives the reaction force from the low night, the night of the stay vibrates similarly. Therefore, vibration noise is generated. In particular, in the low rotation range of the blower, the blow sound of the fan is extremely low, so the vibration noise of the brushless motor itself becomes prominent.

Holding means for holding the mouth and the stay is fixed to the flange member via a rubber member. Therefore, it is conceivable to make the rubber member softer from the viewpoint of preventing the vibrations during low and long stays. However, when the rubber member is softened in this way, although the vibration noise of the motor itself can be reduced, the rotor and the stay can be easily swung up, down, left and right with respect to the flange member. Therefore, when vibration is applied from the outside due to vibrations while the vehicle is running, contact between the fan and the inner wall of the blower case may cause abnormal noise and damage to the fan. Therefore, the mouth and the stay that occur during rotation It is desirable not only to absorb vibrations, but also to prevent the rotor and stays from being shaken by external vibrations.

Accordingly, an object of the present invention is to provide a brushless motor that can reduce vibration noise caused by vibrations in the mouth and the stay and has vibration resistance against external vibrations. It is in. Disclosure of the invention

A brushless motor according to the present invention has a flange member, a fixing portion held by the flange member, a holding member for holding a rotor and a stay on the flange member, and at least the flange member and the holding member. An elastic vibration absorbing member interposed between the member and the member. The member is configured to be easily fallen in the forward and reverse rotation directions of the rotor, and hardly fall in other directions. The vibration absorbing member having a plurality of ribs radially protruding from the rotation center of the mouth. According to such a configuration, the holding member that holds the rotor and the stay is fixed to the flange member via the vibration absorbing member having the rib that is radially protruded from the rotation center of the rotor. Since the vibration of the mouth and the stay that occurs during rotation is caused by torque ripple, the direction of the vibration is the direction of rotation. As a result, the ribs of the vibration absorbing member radially formed with respect to the rotation center of the mouth easily fall down, the vibration absorbing member becomes as soft as possible, and the vibrations of the roof and the stay are absorbed. Noise caused by vibrations of the rotor and the stay is reduced. On the other hand, when vibration is received from the outside, vibration is applied in a direction other than the rotation direction. And the ribs are less likely to fall. As a result, it is difficult for the vibration and vibration to be shaken by external vibration, and the vibration resistance is improved.

The vibration absorbing member may be made of rubber, and may have the rib on one surface and a flat ring shape on the other surface.

A holder member for holding the fixing portion of the holding member on the flange member; Further, first and second vibration absorbing members can be provided as the vibration absorbing members. In this case, the lamination of the fixed portion of the first vibration absorbing member and the holding member and the second vibration absorbing member is sandwiched between the flange member and the holder member. Further, in this configuration, first and second annular concave portions are formed in the flange member concentrically with respect to the rotation center of the rotor, and the holder member is fixed to the first annular concave portion of the flange member. Can be configured. In this case, since the holder member is fixed to the first annular concave portion of the flange member, the lamination of the first vibration absorbing member, the fixing portion of the holding member, and the second vibration absorbing member is performed. It is sandwiched between the holder member and the second annular recess of the flange member.

Further, it is possible to provide a holder member for holding the fixing portion of the holding member on the flange member, and an elastic member having both flat surfaces. In this case, the lamination of the vibration absorbing member, the fixing portion of the holding member, and the elastic member is sandwiched between the flange member and the holder member. According to such a configuration, the movement of the rotor and the stay is suppressed by the flexible member having both flat surfaces. Therefore, when used as an air conditioner for a blower of an air conditioning system for a vehicle, it is possible to more effectively prevent contact between the fan and the bell mouth on the upper surface of the blower case due to external vibration.

In addition, at least one of the flange member and the holder member may be formed with a plurality of stop ribs projecting radially with respect to the rotation center of the rotor. The stopper rib is disposed between the rib of the corresponding vibration absorbing member via a predetermined clearance between a bottom surface of a group between the ribs of the corresponding vibration absorbing member and a free end of the stopper rib. According to such a configuration, the vibration amplitude of the rotor and the stay is regulated by the contact between the stopper and the bottom surface of the group of vibration absorbing members. Therefore, the vibration resistance against external vibration can be further improved.

Further, in this configuration, the flange member is provided with respect to the rotation center of the rotor. First and second annular concave portions may be formed concentrically, and the holder member may be configured to be fixed to the first annular concave portion of the flange member. In this case, the holder member is fixed to the first annular concave portion of the flange member, so that the lamination of the fixed portion of the first vibration absorbing member and the holding means and the second vibration absorbing member, It is sandwiched between the holder member and a second annular recess of the flange member. The stopper rib is provided on a second annular concave portion of the flange member and an annular surface of the holder member that is in contact with Z or the stack.

A plurality of stop ribs can be formed on at least one surface of the fixing portion of the holding member radially with respect to the rotation center of the mouth. The stopper is disposed between the bottom of the group between the ribs of the corresponding vibration absorbing member and the free end of the stopper, with a predetermined clearance between the ribs of the corresponding vibration absorbing member. According to such a configuration, the vibration amplitude of the rotor and the stay is regulated by the contact between the stopper and the bottom surface of the group of the vibration absorbing member. Therefore, the vibration resistance against external vibration can be further improved. When a brushless motor is used as a blower motor of an air conditioning system for a vehicle, the width of the rib of the vibration absorbing member is about 1 to 3 mm so that the rib of the vibration absorbing member is not easily collapsed. Is set to

Also, when the brushless motor is used as a blower motor of a vehicle air conditioning system, the width between the ribs of the vibration absorbing member and the group between the ribs are maintained so that the entire shape of the vibration absorbing member is maintained. The width and the ratio are set to about 1: 0.2-3. This facilitates the arrangement of the vibration absorbing member and facilitates manufacturing.

Further, when the brushless motor is used as a motor for a blower of a vehicle air conditioning system, the width of the rib of the vibration absorbing member is adjusted so that the rib of the vibration absorbing member is not easily disturbed or hard to fall. The ratio to the height is set to about 1: 1 to 3.

The brushless motor according to the present invention includes a flange member, and the flange member holds the flange member. A holding member for holding the rotor and the stay on the flange member, and an elastic vibration absorbing member interposed at least between the flange member and the holding member. A plurality of grooves are formed radially around the center of rotation of the mouth so that the rotor can easily fall down in the normal and reverse rotation directions of the rotor and hardly fall in other directions. And a bellows-shaped vibration absorbing member alternately formed on the surface.

According to such a configuration, the plurality of grooves hold the rotor and the stay through the bellows-like vibration absorbing members alternately formed on one surface and the other surface radially with respect to the rotation center of the rotor. The holding member is fixed to the flange member. Therefore, the vibration absorbing member easily falls down with respect to the vibration of the rotor and the stay generated during rotation. As a result, the vibration absorbing member becomes as soft as possible, and the vibrations of the roof and the stay are absorbed, and the noise caused by the vibration of the mouth and the stay is reduced. On the other hand, when external vibration is applied, the side wall portions of the group of vibration absorbing members function in the same manner as the ribs of the vibration absorbing member described above. Therefore, the rotor and the stay are hardly shaken by the external vibration, and the vibration resistance is improved.

The vibration absorbing member can be made of rubber, and can be formed in a ring shape.

Further, it is possible to provide a holder member for holding the fixing portion of the holding member on the flange member, and first and second vibration absorbing members as the vibration absorbing member. In this case, the lamination of the fixed portion of the first vibration absorbing member and the holding member and the second vibration absorbing member is sandwiched between the flange member and the holder member. Further, in this configuration, first and second annular concave portions are formed in the flange member concentrically with respect to the rotation center of the rotor, and the holder member is fixed to the first annular concave portion of the flange member. Can be configured. In this case, since the holder member is fixed to the first annular concave portion of the flange member, the lamination of the first vibration absorbing member, the fixing portion of the holding member, and the second vibration absorbing member is performed. Is sandwiched between the holder member and a second annular recess of the flange member. You.

A plurality of stopper ribs may be formed on at least one of the flange member and the holder member so as to project radially with respect to the rotation center of the rotor. The stove ribs are arranged in the corresponding group of vibration absorbing members via a predetermined clearance between a bottom surface of the corresponding group of vibration absorbing members and a free end of the stove rib. According to such a configuration, the vibration amplitude of the rotor and the stay is regulated by the contact between the stopper rib and the bottom surface of the group of vibration absorbing members. Therefore, the vibration resistance against external vibration can be further improved. Further, since the vibration absorbing member can be assembled without considering the front and back sides, easiness in manufacturing can be achieved.

Further, in this configuration, first and second annular concave portions are formed in the flange member concentrically with respect to the rotation center of the rotor, and the holder member is fixed to the first annular concave portion of the flange member. Can be configured. In this case, since the holder member is fixed to the first annular concave portion of the flange member, the first vibration absorbing member, the fixed portion of the holding means, and the second vibration absorbing member are fixed to each other. Laminating force is sandwiched between the holder member and the second annular concave portion of the flange member. The stopper is provided on a second annular concave portion of the flange member and an annular surface of the holder member that is in contact with Z or the stack.

Further, a plurality of stopper ribs can be formed on at least one surface of the fixing portion of the holding member radially with respect to the rotation center of the rotor. The stopper ribs are arranged in the corresponding group of vibration absorbing members via a predetermined clearance between a bottom surface of the corresponding group of vibration absorbing members and a free end of the stopper rib. According to such a configuration, the vibration amplitude of the rotor and the stay is regulated by the contact between the stopper rib and the bottom surface of the group of vibration absorbing members. Therefore, the vibration resistance against external vibration can be further improved. Further, since the vibration absorbing member can be assembled without considering the front and back of the vibration absorbing member, easiness in manufacturing can be achieved. In the case where a stopper rib is provided, the clearance may be regulated by joining between the holder member and the flange member. As a result, the clearance can be easily regulated to a predetermined value, and manufacturing can be facilitated.

When the brushless motor is used as a blower motor of a vehicle air conditioning system, the clearance is set to about 0.5 mm.

Moreover, the said holding member can hold | maintain the said stay overnight, It can comprise so that the low evening which was rotatably hold | maintained at the said stay may be hold | maintained together with the said stay overnight. In this case, the holding member has a plurality of fixing portions formed in a radial shape with respect to the rotation center of the rotor, and these fixing portions are held by the flange member via the vibration absorbing member.

In addition, the holding member may be configured so as to rotatably hold the rotatable member and to have a cylindrical portion on an outer circumferential surface for holding the stay. In this case, the holding member has a flange-shaped fixing portion formed on one end side of the cylindrical portion, and the fixing portion is held by the flange member via the vibration absorbing member.

A brushless motor according to the present invention includes: a flange member; a holding member that holds a mouth and a stay on the flange member; a fixing portion fixed to the flange member via an elastic member; A plurality of ribs for connecting a portion to the holding member, wherein the rotor bends in the forward and reverse rotation directions of the rotor, and acts as a brace in other directions. The holding member having the rib provided radially with respect to the center of rotation, and the protrusion protruding toward the elastic member so as to press the elastic member with a small contact surface. .

According to such a configuration, the bending of the ribs causes the roving and the stay to move in the forward and reverse directions of rotation. In addition, since the protrusion presses the elastic member with a small contact surface, the elastic member is easily depressed. As a result, the mouth and stay vibrations that occur during rotation are absorbed. When vibration is applied from the outside, the ribs act like braces, and the vibration of the rotor and the stay is suppressed. Further, the protruding portion can be provided on each rib via a groove so as not to hinder the bending of the rib.

The brushless motor according to the present invention can be applied as a motor for a blower of a vehicle air conditioning system. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a sectional view showing a first embodiment of the brushless motor according to the present invention. FIG. 2 is a perspective view of the lower holding member shown in FIG.

FIG. 3 is a plan view of the vibration absorbing member shown in FIG.

FIG. 4 is a sectional view taken along line AA of the vibration absorbing member of FIG.

FIG. 5 is a plan view of a flange member of the control case shown in FIG.

FIG. 6 is a plan view of the holder member shown in FIG.

FIG. 7 is a BB cross-sectional view of the holder member of FIG.

FIG. 8 is a plan view of the flange member of FIG. 5 in which the lower holding member of FIG. 2, the vibration absorbing member of FIG. 3, and the holder member of FIG. 6 are assembled.

FIG. 9 is a C-C cross-sectional view of the flange member shown in FIG. 8 and shows a circumferential cross section of a fixed portion of the lower holding member.

FIG. 10 is a view showing a second embodiment of the brushless motor according to the present invention, and shows a circumferential section of a fixed portion of a lower holding member provided on a flange member. FIG. 11 is a view showing a third embodiment of the brushless camera according to the present invention, and shows a circumferential cross section of a fixed portion of a lower holding member provided on a flange member. FIG. 12 is a plan view of a flange member applied to the third embodiment of FIG. FIG. 13 is a rear view of the holder member applied to the third embodiment of FIG.

FIG. 14 is a diagram showing an example of a configuration for restricting a clearance between the stopper and the bottom surface of the vibration absorbing member in the third embodiment of FIG.

FIG. 15 is a diagram showing another example of the relationship between the storage rib and the rib of the vibration absorbing member in the third embodiment of FIG. FIG. 16 is a diagram showing a fourth embodiment of the brushless motor according to the present invention, and shows a circumferential section of a fixed portion of a lower holding member provided on a flange member. FIG. 17 is a view showing a fifth embodiment of the brushless motor according to the present invention, and shows a circumferential section of a fixed portion of a lower holding member provided on a flange member. FIG. 18 is a plan view of the vibration absorbing member shown in FIG.

FIG. 19 is a DD sectional view of the vibration absorbing member of FIG.

FIG. 20 is a view showing a sixth embodiment of the brushless motor according to the present invention, and shows a circumferential cross section of a fixed portion of a lower holding member provided on a flange member. FIG. 21 is a view showing another example of a holding member for holding the rotor and the stay. FIG. 22 is a sectional view showing a seventh embodiment of the brushless motor according to the present invention. FIG. 23 is a plan view of the lower holding member shown in FIG.

FIG. 24 is a partial side view of the lower holding member of FIG. 23 viewed from the direction of arrow Y. BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a configuration diagram showing a first embodiment of the present invention, and shows a case where the present invention is applied to a blower of a vehicle air conditioning system.

In FIG. 1, reference numeral 1 indicates a control case, reference numeral 2 indicates a stay, and reference numeral 3 indicates a control case. The rotor 1 and the stay 2 are provided on a control case 3. The rotor 1 has a cylindrical container shape provided with a centrifugal fan 4 such as a sirocco fan on the outside, and is arranged such that a closed surface forms an upper surface and an open surface forms a lower surface. A plurality of permanent magnets 5 are provided on the inner peripheral surface of the rotor 1. The mouth 1 has a shaft hole 6 in the center of the upper surface, and is fixed to the upper part of the motor shaft 7 through the shaft hole 6. The motor shaft 7 is rotatably supported by a cylindrical support member 9 via bearings 10 and 11. The support member 9 is arranged such that its lower end is received in a hole 8 formed in the control case 3. The lower end of the motor shaft 7 protrudes into the control case 3, and a permanent magnet 12 for detecting the rotatable position is fixed to the protruding portion. The motor shaft 7 rotates together with the rotor 1. The stay 2 has a laminated core 13, an armature winding 14 wound around the laminated core 13, an upper holding member 15 and a lower holding member 16, and an inner side of the rotor 1. It is located at A support member 9 is disposed through the center of the laminated core 13, and the support member 9 is fixed to the laminated core 13 by, for example, press fitting. The upper holding member 15 and the lower holding member 16 have holes 17 and 18 for receiving the support member 9. In addition, they are provided at the upper part and the lower part of the laminated core 13 through the intermediaries 17 and 18, respectively, to hold the laminated core 13. The lower holding member 16 is a holding member for holding the rope 1 and the stay 2 in the control case 3. The lower holding member 16 is provided in the control case 3 as described below, so that the lowway 1 and the stay 2 are held on the control case 3.

The control case 3 has a flange member 19 and a case member 20. The flange member 19 forms the bottom surface of a blower case (not shown). The case member 20 is attached to the lower surface side of the flange member 19 via unillustrated screws or the like. Thus, a closed control room 21 is formed. The control room 21 is provided with a circuit board 22 on which a magnetic sensing element 23 such as a hall element and a commute circuit including a power FET 24 are mounted. The magnetically sensitive element 23 detects the magnetic pole position of the permanent magnet 12 provided on the motor shaft 7, that is, the low-light position. The commute circuit controls the commutation of the armature winding 14. The magnetically sensitive element 23 and the commute circuit together constitute a driving means together with the permanent magnet 12 provided on the motor shaft 7. Reference numeral 25 is a heat sink for power FET24. In this example, the control room 21 is formed by the flange member 19 and the case member 20 in order to house the commute overnight circuit. In such a case, it is not necessary to form such a control room 21.

In the brushless motor having such a configuration, the rotor position is detected by the magnetically sensitive element 23, and based on this detection, the commutation of the armature winding 14 of the stay 2 is controlled by the commutator circuit, and In the evening, fan 4 is driven to rotate. If Ryuu 1 is rotating, torque ripple occurs due to commutation, so Ryuu 1 It rotates with vibration. Also, since stay 2 receives a reaction force from rotor 1, stay 2 vibrates similarly. In this example, the configuration described below absorbs the vibrations of the mouth 1 and the stay 2 generated during the rotation of the brushless motor, and also withstands vibrations from the outside such as vibrations while the vehicle is running. Give sex.

As will be described later, the lower holding member 16 for holding the roaster 1 and the stay 1 is connected to the flange member 19 via the vibration absorbing members 26 and 27 having a plurality of ribs 33 and having a property. It is provided on the flange member 19 by a holder member 29 fixed by screws 28. The ribs 33 of the vibration absorbing members 26 and 27 are formed in a convex shape so that they easily fall in the forward and reverse rotation directions of the mouth 1 and hardly fall in other directions.

2 is a perspective view of the lower holding member 16, FIG. 3 is a plan view of the vibration absorbing members 26 and 27, FIG. 4 is a cross-sectional view of the vibration absorbing members 26 and 27 of FIG. 6 is a plan view of the flange member 19, FIG. 6 is a plan view of the holder member 29, and FIG. 7 is a sectional view of the holder member 29 in FIG.

As shown in FIG. 2, the lower holding member 16 has six core holding portions 30 extending radially from a hole 18 for receiving the support member 9, and each of the core holding portions 30. L-shaped fixed legs 31 are formed. The fixing portion 3 1 a of the fixing leg 3 1 is sandwiched between the flange member 19 and the holder member 29 via the vibration absorbing members 26 and 27, whereby the lower holding member 16 is placed on the flange member 19. Is held. In this example, the fixed legs 31 are formed in each of the core holding portions 30. However, the present invention is not limited to this. The fixed leg 31 may be selectively formed on the core holding portion 30.

The vibration absorbing members 26 and 27 are elastic rubber members having a ring shape as shown in FIG. 3, and are made of a rubber material such as IIR (butyl rubber) or EPDM (ethylene propylene rubber). The vibration absorbing members 26 and 27 have a plurality of protruding ribs 33 on one surface and the other surface is formed flat. Groups 34 are provided between the ribs 33 respectively. The ribs 33 are provided so that they can easily fall down in the forward and reverse rotation directions a and b of the rotor 1 and hardly fall in other directions. It is radially convex with respect to the rotation center の of one night. Since the vibration of the rotor 1 and the stay 2 generated during rotation is caused by the torque ripple, the vibration direction is the rotation direction. Therefore, the ribs 33 of the vibration absorbing members 26 and 27 easily fall down against the vibrations of the rotor 1 and the stay 2 generated during rotation, and the vibration absorbing members 26 and 27 are in a soft state. Become like On the other hand, if external vibration is applied, vibration will be applied in directions other than the rotation direction.

The ribs 33 of 26 and 27 are depressed, and the ribs 33 are less likely to fall. The width of the ribs 33 is formed to be uniform or substantially uniform so that the inner side and the outer side have the same inclination. If the width of the rib 33 is too large, the easiness of falling is impaired.In order to prevent the easiness of falling of the rib 33, in the case of a blower for a vehicle, the width of the rib 33 is 1-3. It is desirable to be about mm. If the width of the group 34 between the ribs 33 is too large, the portion of the group 34 is easily distorted, and the entire shape cannot be maintained. Therefore, in the case of a blower for a vehicle, the ratio of the width W i of the rib 33 to the width W ₂ of the group 34 is about 1: 0.2 to 3 so that the overall shape can be maintained. Is desirable. Further, if the height Hi of the rib 33 is too low or the Z height is too high with respect to the width W of the rib 33, the rib 33 is difficult to fall, and the difficulty in falling down occurs. Therefore, in order to prevent the fall and the difficulty of falling down, the ribs should be

It is desirable that the ratio of the width to the height of 33 is 1: 1 to 3. As shown in FIG. 5, the flange member 19 of the control case 3 has first and second annular recesses 36, 37 formed concentrically with the hole 8 for receiving the support member 9. . The first annular concave portion 36 has a screw hole 38 to be screwed with a screw 28 for fixing the holder member 29, and forms a fixing portion of the holder member 29. The second annular recess 37 is formed to be lower than the first annular recess 36 inside the first annular recess 36 continuously from the first annular recess 36. Then, as shown in FIG. 1, a laminate of the vibration absorbing member 26, the fixed portion 31a of the lower holding member 16 and the vibration absorbing member 27 is disposed in the second annular concave portion 37. Is done. The holder member 29 has a ring shape as shown in FIG. 6 and has an outer diameter that is received in the first ring-shaped concave portion 36 of the flange member 19, and has a fixing portion 3 1 a of the lower holding member 16. Has an inner diameter that substantially covers As shown in FIGS. 6 and 7, the holder member 29 has an annular concave portion 40 having a diameter larger than the inner diameter on the back surface thereof, and a flange is formed by the annular concave portion 40 and the outer periphery of the holder member 29. A fixing portion 41 fixed to the first annular concave portion 36 of the member 19 is defined. The fixing portion 41 has a hole 42 into which the screw 28 is inserted. The annular concave portion 40 of the holder member 29 has substantially the same outer diameter as the second annular concave portion 37 of the flange member 19. The lamination of the fixed part 31 a of the vibration absorbing member 26 and the lower holding member 16 and the vibration absorbing member 27 is performed by fixing the fixed part 41 of the holder member 29 to the first annular concave portion of the flange member 19. By being fixed to 36, it is sandwiched between the second annular concave portion 37 of the flange member 19 and the annular concave portion 40 of the holder member 29. FIG. 8 shows a plan view of a flange member 19 in which a lower holding member 16, vibration absorbing members 26 and 27, and a holder member 29 are assembled, and FIG. 9 is a cross-sectional view taken along a line C-C in FIG. 8. Is shown. From these figures, it can be seen that the lamination of the fixed portion 31a of the vibration absorbing member 26 and the lower holding member 16 and the vibration absorbing member 27 is the second annular concave portion 37 of the flange member 19 and the holder member 29. The state of being sandwiched between the annular concave portions 40 can be more clearly understood. According to such a configuration, when the rotor 1 and the stay 2 vibrate due to the rotation of the motor, the vibration directions thereof are the rotation directions a and b as described above, so that the mouth 1 and the stay 1 The fixed portion 31 a of the lower holding member 16 holding the 2 vibrates in the rotation directions a and b. As a result, the vibration absorbing members 26 and 27 become soft as if the ribs 33 easily fall down, so that the vibrations of the rotor 1 and the stay 2 are absorbed. On the other hand, if the vehicle receives vibrations from the outside due to vibrations while the vehicle is running, it will receive vibrations in directions other than the rotation direction, that is, vibrations in the vertical and horizontal directions. The rib 33 is depressed due to the tension, and the rib 33 is hard to fall down, and the swing of the mouth 1 and the stay 2 is suppressed. In the example described above, the ribs 33 of the vibration absorbing members 26 and 27 are provided so as to be in contact with the second annular concave portion 37 of the flange member 19 and the annular concave portion 40 of the holder member 29, respectively. However, the present invention is not limited to this. The vibration absorbing members 26 and 27 may be provided so that the rib 33 side is in contact with the fixing portion 31 a of the lower holding member 16.

FIG. 10 is a view showing a second embodiment of the present invention, and shows a circumferential cross section of a fixing portion of a lower holding member 16 provided on a flange member 19. In FIG. 10, the same components as those in the first embodiment represent the same components. In the second embodiment, instead of the vibration absorbing member 27, an annular elastic member 45 having no rib and group is provided between the fixing portion 31a of the lower holding member 16 and the holder member 29. Is provided. That is, both surfaces of the elastic member 45 are flat. The elastic member 45 is made of, for example, a rubber material such as I 1 M in length. According to this, the space between the fixing portion 31a of the lower holding member 16 and the holder member 29 becomes hard, and upward movement of the mouth 1 and the stay 2 is suppressed. Therefore, contact between the fan 4 and the bell mouth on the upper surface of the blower case due to external vibration can be more effectively prevented. Other configurations are as described in the first embodiment.

FIG. 11 is a view showing a third embodiment of the present invention, and shows a circumferential section of a fixed portion of a lower holding member 16 provided on a flange member 50. FIG. 12 is a plan view of a flange member 50 applied to the third embodiment, and FIG. 13 is a rear view of the holder member 51 applied to the third embodiment. In the third embodiment, the flange member 50 and the holder member 51 are applied to the first embodiment instead of the flange member 19 and the holder member 29 of the first embodiment.

In the third embodiment, the flange member 50 and the holder member 51 have a plurality of stopper ribs 52, 53, respectively, and the stopper ribs 52, 53 and the group 34 of the vibration absorbing members 26, 27 belong to the group 34. Vibration amplitude of rotor 1 and stay 2 is regulated by contact with the bottom surface.

As shown in FIG. 12, in the flange member 50, a stopper rib 52 is formed in the second annular concave portion 37 so as to project radially with respect to the rotation center の of the mouth 1. As shown in FIG. 13, the holder member 51 has an annular recess 40 formed on the The stopper ribs 53 are formed so as to protrude radially with respect to the rotation center の. In this example, the stock parrivs 52 and 53 are formed integrally with the flange member 50 and the holder member 51. Therefore, the stopper ribs 52, 53 are hard and do not have the elasticity of the vibration absorbing members 26, 27. The flat surfaces of the vibration absorbing members 26 and 27 are in contact with the fixing portion 31 a of the lower holding member 16, and the flange members 52 and 53 of the holder members 51 are provided between the ribs 33. It is provided to be located. The height of the ribs 52, 53 is formed lower than the ribs 33 of the vibration absorbing members 26, 27. Thus, when the lamination of the vibration absorbing member 26 and the fixed portion 31a of the lower holding member 16 and the vibration absorbing member 27 is fixed by the flange member 50 and the holder member 51, FIG. As shown in the figure, the free ends of the ribs 33 of the vibration absorbing members 26 and 27 are in contact with the bottom surface of the second annular concave portion 37 of the flange member 50 and the bottom surface of the annular concave portion 40 of the holder member 51. A predetermined clearance X is provided between the free ends of the stopper ribs 52, 53 and the bottom surface of the group 34 of the vibration absorbing members 26, 27. The clearance X is set so that the vibration amplitude of the rotor 1 and the stay 2 against external vibration can be regulated to a desired value, and the absorption of vibration in the rotational direction is not impaired. In the case of a blower for a vehicle, the clearance X is set to, for example, about 0.5 mm. Further, the group 34 of the vibration absorbing members 26 and 27 is designed to receive the stopper ribs 52 and 53 with a margin so that the ease of falling of the rib 33 is not hindered.

FIG. 14 is a diagram showing an example of a configuration for regulating the clearance X between the stopper ribs 52, 53 and the bottom surface of the group 34 of the vibration absorbing members 26, 27 in the configuration of FIG. . In this example, when the fixing portion 41 of the holder member 51 is joined to the first annular recess 36 of the flange member 50, the first annular recess 36 of the flange member 50 and the second annular recess 36 are formed. The clearance X is regulated to a predetermined value by the depth H2 between the concave portion 37 and the depth H3 of the annular concave portion 40 of the holder member 51. According to this example, the clearance X is regulated only by joining the holder member 51 to the flange member 50, and there is no need to provide a separate part, so that manufacturing is facilitated. Can be. Other configurations are as described in the first embodiment.

According to the third embodiment, the vibrations of the row 1 and the stay 2 generated during rotation due to the tendency of the ribs 33 of the vibration absorbing members 26 and 27 to fall can be absorbed. The same effects as the embodiment can be obtained. On the other hand, when the roof 1 and the stay 2 are subjected to external vibrations, even if the stepping force of the ribs 33 of the vibration absorbing members 26 and 27 loses the strength of the external vibration, , 53 regulate the vibration amplitude of mouth 1 and stay 2. That is, when the rotor 1 and the stay 2 move by the clearance X due to the vibration, the stoppers 52, 53 come into contact with the bottom of the group 34 of the vibration absorbing members 26, 27, and the rotor 1 and the stay 1 stay. 2 stops moving anymore. Therefore, according to this example, it is possible to further improve the vibration resistance.

In the third embodiment, the stopper ribs 52 and 53 are provided on both the flange member 50 and the holder member 51 of the control case 3, but the present invention is not limited to this. For example, when it is desired to restrict only upward or downward movement, a stopper rib can be formed on one of the holder member 51 and the flange member 50.

In the third embodiment, the stopper ribs 52 and 53 are formed integrally with the flange member 50 and the holder member 51, but the present invention is not limited to this. The stoppers 52, 53 are formed separately from the flange member 50 and the holder member 51 in a shape like the vibration absorbing members 26, 27 of FIG. 3, and these are formed on the second ring of the flange member 50. The concave portion 37 and the annular concave portion 40 of the holder member 50 may be provided respectively. According to this, since it is not necessary to form the stopper rib on the flange member and the holder member, the existing flange member and the holder member can be used, and easiness in manufacturing and cost reduction can be achieved.

Furthermore, in the third embodiment, the stopper ribs 52 and 53 and the ribs 33 of the vibration absorbing members 26 and 27 are configured to be alternately arranged, but the present invention is not limited to this. For example, as shown in FIG. 15, each of the two ribs 33 of the vibration absorbing members 26 and 27 has a gap. It can be arbitrarily selected, for example, by providing a top rib 5 3 (52). FIG. 16 is a view showing a fourth embodiment of the present invention, and shows a circumferential section of a fixed portion of the lower holding member 16 provided on the flange member 19. In the fourth embodiment, a stopper rib 55 is provided on a lower holding member 16 instead of the stopper members 52 and 53 of the flange member 50 and the holder member 51 in the third embodiment. The stopper ribs 55 of the lower holding member 16 are formed on both surfaces of the fixed portion 3 la so as to project radially with respect to the rotation center of the rotor 1. The flat surfaces of the vibration absorbing members 26 and 27 are in contact with the annular recess 37 of the flange member 19 and the annular recess 40 of the holder member 29, respectively, and the lower holding member 16 is fixed between the ribs 33. It is provided so that the storage rib 55 of the part 31a is located. Other configurations including the clearance X are as described in FIGS. 1 and 11. According to such a configuration, as in the third embodiment, the stop portion 55 of the fixing portion 31 a of the lower holding member 16 abuts against the bottom surface of the group 34 of the vibration absorbing members 26 and 27. The effect can be achieved.

In the fourth embodiment, the stop ribs 55 are provided on both surfaces of the fixing portion 16a of the lower holding member 16, but the present invention is not limited to this. The stopper rib 55 may be provided only on one surface of the fixing portion 16a.

FIG. 17 is a view showing a fifth embodiment of the present invention, and shows a circumferential cross section of a fixing portion of a lower holding member 16 provided on a flange member 19. FIG. 18 is a plan view of the vibration absorbing members 61 and 60 shown in FIG. 17, and FIG. 19 is a D-D cross-sectional view of the vibration absorbing member of FIG.

In the fifth embodiment, the vibration absorbing members 60 and 61 shown in FIGS. 18 and 19 are used instead of the vibration absorbing members 26 and 27 of the first embodiment. The vibration absorbing members 60 and 61 are annular rubber members and are made of a rubber material such as IIR or EPDM, like the vibration absorbing members 26 and 27 of the first embodiment. As shown in FIG. 19, the vibration absorbing members 60 and 61 are formed so that a plurality of groups 62 are formed so that a cross section along the rotation direction of the rotor 1 becomes a bellows-like shape. Are formed alternately. The glove 62 is formed radially with respect to the rotation center の of the rotor 1. to this As a result, the vibration absorbing member 60, 61 easily falls down in the forward and reverse rotation directions a, b of the opening 1 and hardly falls in other directions.

As shown in FIG. 17, the lamination of the fixed portion 31 a of the vibration absorbing member 60 and the lower holding member 16 and the vibration absorbing member 61, as shown in FIG. 17, includes the flange member 19 of the control case 3 and the holder member 2. 9 and is fixed on the flange member 19. According to the fifth embodiment, the vibrations of the mouth 1 and the stay 2 generated during rotation are absorbed by the tendency of the vibration absorbing members 60 and 61 to fall, so that the same effects as in the first embodiment are obtained. Can be played. On the other hand, if vibrations are received from the outside, vibrations in directions other than the rotation direction, that is, vibrations in the vertical and horizontal directions will be received, so the side wall of the group 62 will be covered by the vibration absorbing members 26, 27. It functions in the same way as the rib 33, and the vibration absorbing members 60 and 61 are hard to fall down due to the treading force, and the swing of the mouth 1 and the stay 2 is suppressed.

FIG. 20 is a view showing a sixth embodiment of the present invention, and shows a circumferential cross section of a fixing portion of the lower holding member 16 provided on the flange member 65. In the sixth embodiment, a flange member 65 having stopper ribs 67 and 68 and a holder member 66 are used in place of the flange member 19 and the holder member 29.

The flange member 65 has a stopper rib 67 in the second annular concave portion 37, and the holder member 66 has a stopper rib 68 in the annular concave portion 40 on the rear surface. The stoppers 67 and 68 are located in the group 62 of the vibration absorbing members 60 and 61. The lamination between the vibration absorbing member 60 and the fixed portion 31 a of the lower holding member 16 and the vibration absorbing member 61 is defined by a predetermined clearance X between the stop ribs 67, 68 and the bottom of the group 62. Is held between the flange member 65 and the holder member 66 so as to be fixed on the flange member 65. Other configurations are as described in FIG. According to the sixth embodiment, the same effect as that of the third embodiment shown in FIG. 11 can be obtained by abutment between the stoppers 67 and 68 and the bottom surface of the group 62 of the vibration absorbing members 60 and 61. Can be. Furthermore, according to this example, since the vibration absorbing members 60 and 61 can be assembled without considering the front and back, it is easy to manufacture. Wear.

In the sixth embodiment, the stopper ribs 67 and 68 are provided on the flange member 65 and the holder member 66 of the control case 3 instead of or together with the stopper ribs 67 and 68 as in the fourth embodiment in FIG. Alternatively, a stopper may be provided on the fixing portion 31 a of the lower holding member 16.

In each of the embodiments described above, an annular vibration absorbing member is used, but the present invention is not limited to this. For example, the vibration absorbing member can be partially applied to the fixed portion of the lower holding member 16.

In each of the above-described embodiments, the rotor 1 and the stay 2 are held by the lower holding member 16 that holds the stay 2, but the present invention is not limited to this. The present invention can be applied as shown in FIG. 21 even when the holding member that rotatably supports the roaster and holds the stay is fixed to the control case. FIG. 21 is a view showing another example of a holding member for holding the rotor and the stay. In FIG. 21, reference numeral 70 is a holding member having a cylindrical portion. The holding member 70 rotatably holds the motor shaft 71 to which the rotor (not shown) is fixed via the bearings 72 and 73 so as to be rotatable via the bearings 72 and 73. Holding. The holding member 70 has a flange 75 at the lower end, and a portion of the flange 75 forms a fixing portion 77. The fixing portion 77 is fixed to the control case 76 by the holder member 79 via the vibration absorbing members 78, 80. As the vibration absorbing members 78 and 80, the vibration absorbing members of the above-described embodiments are used. Further, the above-mentioned stopper is applied to the control case 76, the holder member 79, or the fixing portion 77 of the holding member 70. FIG. 22 is a cross-sectional view showing a seventh embodiment of the present invention, and shows a fixed portion of a lower holding member that holds the row and the stay. In the figure, reference numeral 90 is a lower holding member, and reference numerals 91 and 92 are elastic members. In FIG. 22, the same reference numerals as those in FIG. 1 indicate the same components. FIG. 23 is a plan view of the lower holding member 90 of FIG. 22. FIG. 24 is a partial side view of the lower holding member 90 of FIG. The lower holding member 90 receives the supporting member 9 similarly to the lower holding member 16 in FIG. It has a hole 18 and six core holding portions 30 extending radially from the hole 18 to hold the rotor and the stay. The core holding part 30 has a leg part 95 extending downward at the outer end thereof. The fixing portion 93 of the lower holding member 90 is connected to the leg portion 95 by five ribs 94 in this example. The rib 94 is provided radially with respect to the rotation center O of the mouth 1. As a result, the ribs 94 are bent in the forward and reverse directions of rotation of the rotor 1, and the ribs 94 act like a brace in other directions. A protruding portion 96 is provided inside each rib 94 so as to slightly protrude below the fixing portion 93. The protruding portion 96 is formed inside the rib 94 via a groove 97 as shown in FIG. The protruding portion 96 is formed radially with respect to the rotation center O of the rotor 1 like the rib 94, and is easily bent in the forward and reverse rotation directions of the rotor 1. A groove 97 is formed between the rib 94 and the protrusion 96 so that the deflection of the rib 94 is not hindered by the protrusion 96. Further, the protruding portion 96 is formed so as to press the elastic member 91 with a small contact surface so that the elastic member 91 is easily depressed.

The elastic members 91 and 92 are annular rubber members having flat surfaces on both sides, as shown in FIG. 22, between the fixing portion 93 of the lower holding member 90 and the holder member 29 and the lower holding member. It is provided between the fixing portion 93 of the member 90 and the flange member 19 of the control case 3, respectively. As a result, the lamination of the fixing portion 93 of the elastic member 91, the lower holding member 90, and the flexible member 92 becomes a holder member fixed to the flange member 19 and the flange member 19 via the screw 28. Fixed by 2 9 and. Other configurations are as described in FIG. According to the seventh embodiment, the projections 96 of the ribs 94 press the elastic member 91 with a small contact surface against the vibration of the rotor and the stay that occur during rotation. Are easily depressed and the vibration absorption is increased. In addition, the ribs 94 and the protruding portions 96 bend in the rotational direction, and vibration is absorbed by their elasticity. On the other hand, when vibration is applied from the outside, the rib 94 acts like a brace, and the vibration of the low evening 1 and the stay evening 2 is suppressed. Industrial applicability

The brushless motor according to the present invention can be effectively used as a brushless motor for a vehicle air conditioning system.

Claims

The scope of the claims

1. Flange members,

A holding member having a fixing portion held by the flange member, and holding a row and a stay on the flange member;

An elastic vibration absorbing member interposed at least between the flange member and the holding member, and easily falls down in the forward and reverse rotation directions of the rotor, and in other directions. A brushless motor comprising: a vibration absorbing member having a plurality of ribs that are radially protruded with respect to a rotation center of the mouth so as to be hard to fall.

2. The brushless motor according to claim 1, wherein the vibration absorbing member is made of rubber, has the rib on one surface, and has a flat annular shape on the other surface.

3. It has a holder member for holding the fixing portion of the holding member to the flange member, and has first and second vibration absorbing members as the vibration absorbing member. 2. The brushless motor according to claim 1, wherein the lamination of the fixing portion of the holding member and the second vibration absorbing member is sandwiched between the flange member and the holder member. 3.

4. The flange member has first and second annular recesses formed concentrically with the center of rotation of the mouth,

The holder member has an annular shape having an outer diameter received in the first annular concave portion of the flange member,

When the holder member is fixed to the first annular concave portion of the flange member, the lamination of the first vibration absorbing member, the fixing portion of the holding member, and the second vibration absorbing member, 4. The brushless motor according to claim 3, wherein the brushless motor is sandwiched between the holder member and a second annular concave portion of the flange member.

5. A holder member for holding the fixing portion of the holding member to the flange member, and an elastic member having both flat surfaces, 2. The brushless motor according to claim 1, wherein a laminate of the vibration absorbing member, a fixing portion of the holding member, and the elastic member is sandwiched between the flange member and the holder member.

6. At least one of the flange member and the holder member has a plurality of stop ribs radially formed with respect to the rotation center of the rotor, and a bottom surface of a groove between ribs of the corresponding vibration absorbing member. A predetermined clearance is provided between the free end of the stopper rib and the bottom surface of the groove of the corresponding vibration absorbing member so that the vibration amplitude of the mouth and the stay is regulated by the contact with the stopper rib. 4. The brushless motor according to claim 3, wherein the stopper is disposed between ribs of the corresponding vibration absorbing member.

7. The flange member has first and second annular recesses formed concentrically with the rotation center of the rotor,

The holder member has an annular shape having an outer diameter received in the first annular recess of the flange member;

When the holder member is fixed to the first annular concave portion of the flange member, the lamination of the first vibration absorbing member, the fixed portion of the holding means, and the second vibration absorbing member is performed. Being sandwiched between the holder member and a second annular recess of the flange member,

7. The brushless motor according to claim 6, wherein the stopper is provided on a second annular concave portion of the flange member and an annular surface of the holder member that is in contact with Z or the laminate.

8. The fixing portion of the holding member has, on at least one surface, a plurality of stopper ribs that are radially formed with respect to the rotation center of the rotor,

The free end of the stopper rib and the corresponding vibration absorbing member are so controlled that the contact between the bottom surface of the group between the ribs of the corresponding vibration absorbing member and the stopper rib controls the vibration amplitude of the rotatable and stationary members. With a predetermined clearance between the stopper rib and the bottom surface of the group of members, the stopper rib 4. The brushless motor according to claim 3, which is arranged between the brushless motors.

9. The brushless motor according to claim 2, wherein the brushless motor is a blower motor of a vehicle air conditioning system, and a width of the rib of the vibration absorbing member is set to about 1 to 3 mm.

10. The brushless motor is a blower motor of a vehicle air conditioning system, and a ratio of a width of a rib of the vibration absorbing member to a width of a group between the ribs is set to about 1: 0.2 to 3. The brushless motor according to claim 2.

The brushless motor according to claim 2, wherein the brushless motor is a motor for a blower of a vehicle air conditioning system, and a ratio of a width and a height of a rib of the vibration absorbing member is set to about 1: 1 to 3. motor.

1 2. Flange member,

A holding member having a fixing portion held by the flange member, and holding a mouth and a stay on the flange member;

A vibration absorbing member of a nature interposed between at least the flange member and the holding member. The vibration absorbing member easily falls down in forward and reverse rotation directions of the rotor, and in other directions. A brushless motor having a bellows-like vibration absorbing member in which a plurality of groups are alternately formed on one surface and the other surface radially with respect to the rotation center of the rotor so as to be hard to fall.

13. The brushless camera according to claim 12, wherein the vibration absorbing member is made of rubber and has a ring shape.

14. It has a holder member for holding the fixing portion of the holding member to the flange member, and has first and second vibration absorbing members as the vibration absorbing member. The brushless motor according to claim 12, wherein a laminate of the fixing portion of the holding member and the second vibration absorbing member is sandwiched between the flange member and the holder member.

15. The flange member has first and second annular recesses formed concentrically with respect to the rotation center of the rotor, The holder member has an annular shape having an outer diameter received in the first annular concave portion of the flange member,

When the holder member is fixed to the first annular concave portion of the flange member, the lamination of the first vibration absorbing member, the fixing portion of the holding member, and the second vibration absorbing member, 15. The brushless module according to claim 14, wherein the brushless module is sandwiched between the holder member and a second annular concave portion of the flange member.

16. At least one of the flange member and the holder member has a plurality of stop ribs formed radially convex with respect to the rotation center of the rotor, and the bottom surface of the corresponding group of vibration absorbing members, the stopper rib, A predetermined clearance is provided between the free end of the stove rib and the bottom surface of the corresponding group of vibration absorbing members so that the vibration amplitude of the row and the bar is regulated by the contact of 15. The brushless motor according to claim 14, wherein the stop-paris is arranged in the corresponding group of vibration absorbing members.

17. The flange member has first and second annular recesses formed concentrically with the rotation center of the rotor,

17. The brushless motor according to claim 16, wherein the stop rib is provided on a second annular concave portion of the flange member and / or an annular surface of the holder member that is in contact with the stack.

18. The fixing portion of the holding member has, on at least one surface, a plurality of stopper ribs radially formed with respect to the center of rotation of the rotor,

By the contact between the bottom of the corresponding group of vibration absorbing members and the stopper rib The stono and the rib are provided via a predetermined clearance between the free end of the stopper rib and the bottom surface of the corresponding group of the vibration absorbing members so that the vibration amplitude of the low and the night is regulated. 15. The brushless motor according to claim 14, wherein said brushless motor is arranged in said corresponding group of vibration absorbing members.

19. The brushless motor according to claim 6, wherein the clearance is regulated by a joint between the holder member and the flange member.

20. The brushless motor according to claim 6, wherein the brushless motor is a blower motor of a vehicle air conditioning system, and the clearance is set to about 0.5 mm.

2 1. The holding member holds the rotor together with the rotor held rotatably in the stay by holding the stay together.

13. The holding member according to claim 1, wherein the holding member has a plurality of fixing portions formed radially with respect to a rotation center of the rotor, and the fixing portion is held by the flange member via the vibration absorbing member. The brushless motor as described.

22. The holding member rotatably holds the rotor, and has a cylindrical portion on an outer peripheral surface for holding the stay.

3. The holding member according to claim 1, wherein the holding member has a flange-shaped fixing portion formed on one end side of the cylindrical portion, and the fixing portion is held by the flange member via the vibration absorbing member. Brushlessmo overnight.

2 3. Flange member and

A holding member for holding a rotor and a stay on the flange member, a fixing portion fixed to the flange member via an elastic member,

A plurality of ribs for connecting the fixing portion to the holding member, wherein the ribs bend in the normal and reverse rotation directions of the rotor and act as braces in other directions. The rib provided radially with respect to the center of rotation of the mouth, A protrusion projecting toward the elastic member so as to press the elastic member with a small contact surface;

A brushless motor comprising the holding member having:

24. The brushless motor according to claim 23, wherein the protruding portion is provided on each rib via a groove so as not to hinder the bending of the rib.

25. The brushless motor according to claim 1, wherein the brushless motor is a blower motor of a vehicle air conditioning system.