JP2005096670A - Motor mount structure and vehicular actuator equipped with motor mount structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely absorb vibration of a motor by an annular elastic body; and to prevent partial deterioration of the annular elastic body. <P>SOLUTION: This motor mount structure is provided with the motor 22 having a cylindrical protrusion 32 protruding to the extending direction of a rotational axis 31 on a front end surface 30a and a rear end surface 30b, the annular elastic body 33 into which the cylindrical protrusion 32 is inserted and abutted to a peripheral surface 32a of the cylindrical protrusion 32 and the end surfaces 30a and 30b, and mount brackets 36 and 37 for fixing the motor 22 in a motor case 28 through the cylindrical elastic body 33. The abutting surface of the mount bracket 36 and 37 with the cylindrical elastic body 33 is constituted by a tilt surface 38 for energizing the cylindrical elastic body 33 to the peripheral surface 32a and the end surfaces 30a and 30b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a motor mount structure including a motor, an annular elastic body provided on the motor, and a mount bracket for fixing the motor to a motor case via the annular elastic body. The present invention relates to a vehicle actuator provided.

  Many vehicle actuators are installed in the drive mechanism portion of the vehicle. For example, in an automotive air conditioner or the like, there is a device that transmits the rotation of a rotary shaft provided in a motor to an output gear through a plurality of gears, and changes the opening / closing degree of the air conditioning door by the output of the output gear. Applicable. As shown in FIG. 3, a general vehicle actuator 1 includes a drive motor 2, gears 4, 5, 6, an output gear 7, and a circuit that is energized according to the rotation angle of the output gear 7. A printed circuit board 8 on which pattern switching is performed and a motor case 9 are provided. In addition, since the concrete structure, operation | movement, etc. of the vehicle-mounted actuator 1 are a well-known technique in the expert, detailed description here is abbreviate | omitted (for example, refer patent document 1).

A generally used motor 2 includes a rotating shaft (drive shaft) 3 with which a gear 4 meshes, a main body portion 10 having a cylindrical shape, and a columnar convex portion 11 projecting in the extending direction of the rotating shaft 3. And. The columnar convex portion 11 is formed on the front and rear end surfaces 10 a and 10 b of the main body portion 10. An O-ring 12 is attached to the cylindrical convex portion 11 so as to contact the front and rear end faces 10a and 10b. On the other hand, the motor case 9 is provided with a mount bracket 13 for fixing the motor 2 to the motor case 9. The mount bracket 13 is formed with a groove 14 having substantially the same diameter as the ring diameter of the O-ring 12, and the motor 2 is held via the O-ring 12 by accommodating the O-ring 12 in the groove 14. It has become. By providing the groove 14 in the mount bracket 13 in this manner, the vibration of the motor 2 in the radial direction of the O-ring 12 (the direction of arrow A in FIG. 3) can be caused by the peripheral surface 11a of the cylindrical protrusion 11 and the side wall 14a of the groove 14. The vibration of the motor 2 with respect to the extending direction of the rotating shaft 3 (the direction of arrow B in FIG. 3) can be suppressed by the front and rear end faces 10a and 10b of the main body 10 and the upper and lower inner walls 14b of the groove 14. It has become.
Japanese Utility Model Publication No. 63-33691

  However, when the motor 2 is held by the mount bracket 13 as described above, the O-ring 12 receives pressure from the two directions of the radial direction of the O-ring 12 and the extending direction of the rotary shaft 3, so There has been a problem that the compression burden ratio becomes high and partial deterioration tends to occur depending on the compression direction. Further, even when only one of the four surfaces of the O-ring 12 is deteriorated, a portion where the motor 2 and the mount bracket 13 are in direct contact with each other is generated and the play is generated. There was a problem. Furthermore, in the case of four-surface compression, it is difficult to uniformly compress the entire circumference of the O-ring 12, so that the compression load factor is partially different, and part of the return shape is partially degraded. There was a problem.

  The present invention has been made to solve the above problems, and the present invention can reliably absorb the vibration of the motor by the annular elastic body and further prevent partial deterioration of the annular elastic body. It is an object of the present invention to provide a motor mount structure and a vehicle actuator including the motor mount structure.

  In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a motor in which a columnar convex portion protruding in the extending direction of the rotating shaft is formed on at least one end surface of the front end surface or the rear end surface, and the columnar An annular elastic body that is inserted into the convex portion and contacts the peripheral surface of the cylindrical convex portion and the end surface, and a mount bracket for fixing the motor to the motor case via the annular elastic body, The mounting structure of the motor comprising: the contact surface of the mount bracket with the annular elastic body is constituted by an inclined surface that biases the annular elastic body toward the peripheral surface and the end surface. It is characterized by having a motor mount structure.

  According to a second aspect of the present invention, in the motor mount structure according to the first aspect, the inclined surface has a circular opening end surface formed on the mount bracket as viewed from the end surface side in the extending direction. It is a taper surface formed by reducing the diameter.

  The invention according to claim 3 is an actuator for a vehicle provided with the motor mount structure according to claim 1 or 2.

  According to the first aspect of the invention, the contact surface of the mount bracket with the annular elastic body is constituted by the inclined surface that urges the annular elastic body against the peripheral surface and the end surface. Is held by the mounting bracket, the annular elastic body is pressed against the three sides of the motor end face, the peripheral surface of the cylindrical convex portion, and the inclined surface, and compared with the conventional case where the annular elastic body is contacted with the four faces. The applied pressure is less likely to be biased, and the annular elastic body is less likely to partially deteriorate.

  In particular, according to the invention of claim 2, since the inclined surface is a tapered surface, the entire annular elastic body can be uniformly compressed. For this reason, the pressure applied to the annular elastic body is less likely to be biased, and deterioration of the entire annular elastic body can be suppressed as compared with the four-surface pressure contact structure. Furthermore, the tapered surface can absorb all vibrations of the motor in the up-down, left-right, and front-back directions with a ring-shaped elastic body in a well-balanced manner.

  According to the invention concerning Claim 3, it becomes possible to provide the actuator for vehicles which produces the effect of Claim 1 and Claim 2 mentioned above.

  Hereinafter, it demonstrates in detail based on drawing.

  Hereinafter, an actuator provided with a motor mount structure according to the present invention will be described with reference to the drawings. As shown in FIG. 1, the actuator 21 includes a motor 22, an intermediate gear 24, intermediate gears 23 and 25 meshed with the intermediate gear 24, an output gear 26, and a printed circuit board 27. The intermediate gears 23, 24, 25, the output gear 26, and the printed circuit board 27 are accommodated in a motor case 28.

  The motor 22 is provided so as to stand upright in the extending direction of the rotating shaft 31, the columnar main body 30 having a substantially bowl-shaped cross-sectional shape, the rotating shaft 31 formed on the front end surfaces 30 a and 30 b of the main body 30. And a columnar convex portion 32 formed on the front end surface 30a and the rear end surface 30b. Further, as shown in FIG. 2, the rear end face 30 b is provided with a locking projection 30 c that is locked to a non-locking portion (not shown) to prevent the motor 22 from rotating.

  An O-ring 33 having substantially the same diameter as that of the cylindrical convex portion 32 is provided on the cylindrical convex portion 32 of the motor 22 so as to contact the end surfaces 30a and 30b. The O-ring 33 has a function of suppressing vibration of the motor 22 fixed to the motor case 28.

  An intermediate gear 23 is meshed with the rotating shaft 31 of the motor 22, and an intermediate gear 25 is meshed with the output gear 26. As the rotary shaft 31 rotates, each of the intermediate gears 23, 24, and 25 rotates, and finally the output gear 26 rotates. An output shaft (not shown) connected to the support shaft 26a of the output gear 26 is formed on the upper surface of the output gear 26, and the air conditioning opening / closing of the automotive air conditioner is changed according to the rotation angle of the output shaft. The opening / closing position (opening / closing degree) of the door is controlled. A pair of brushes (not shown) is formed on the lower surface of the output gear 26, and the installation position of the brush moves around the support shaft 26 a as the output gear 23 rotates.

  The printed circuit board 27 is formed with a holding portion (not shown) on which the support shaft 26a of the output gear 26 is rotatably supported. On the printed circuit board 27, a substantially semicircular circuit pattern (not shown) is formed concentrically around the holding portion. The motor 22 is energized by contact between the brush and the circuit pattern that are moved along with the rotation of the output gear 26, and the rotation shaft 31 is rotated. In addition, since the structure and the effect | action regarding the output gear 26 and the printed circuit board 27 are so-called technical content well-known to those skilled in the art by patent document 1 etc., detailed description here is abbreviate | omitted.

  The motor case 28 includes an upper case and a lower case 34. The upper case and the lower case 34 are provided with two mounting brackets 36 and 37 for fixing the motor 22. The ends of the mount brackets 36 and 37 are cut out in a semicircular shape when viewed from the front, and the cutouts have wide openings on the end faces 30a and 30b of the main body 30 and have an opening diameter as they progress in the thickness direction. Is continuously narrowed (reduced in diameter). Since the cutout portions of the mount brackets 36 and 37 are formed in this way, the upper case and the lower case 34 are connected, and the end of the mount bracket 36 on the upper case side and the end of the mount bracket 37 on the lower case 34 side are connected. When the contact is made, the end surface of the notch portion is constituted by the tapered surface 38. The tapered surface 38 of the notch has an inclination of approximately 45 degrees with respect to the end surfaces 30a and 30b of the main body 30 and the peripheral surface 32a of the cylindrical convex portion 32, and the motor 22 is mounted by the mount brackets 36 and 37. When held, the O-ring 33 comes into pressure contact with the three surfaces of the end faces 30 a and 30 b of the main body 30, the peripheral surface 32 a of the cylindrical protrusion 32, and the tapered surface 38, and the motor 22 is held by the mount brackets 36 and 37. .

  As described above, when the motor 22 is held by the mount brackets 36 and 37, the O-ring 33 is pressed against the three surfaces of the end surfaces 30 a and 30 b of the main body 30, the peripheral surface 32 a of the cylindrical convex portion 32, and the tapered surface 38. The pressure applied to the O-ring 33 is less likely to be biased and the O-ring 33 is less likely to be partially deteriorated as compared to the conventional four-face pressure contact.

  In particular, when the end of the mount bracket 36 on the upper case side and the end of the mount bracket 37 on the lower case 34 come into contact with each other, the notch portion forms a tapered surface 38, so that the entire circumference of the O-ring 33 is tapered. The surface 38 abuts and the entire O-ring 33 can be uniformly compressed. For this reason, by using the motor mount structure according to the present invention, the pressure applied to the O-ring 33 is less likely to be biased, and deterioration of the entire O-ring 33 can be suppressed as compared to the four-surface pressure-contact structure.

  Furthermore, since the tapered surface 38 of the notch portion has an inclination of about 45 degrees with respect to the end surfaces 30a and 30b of the main body portion 30 and the peripheral surface 32a of the cylindrical convex portion 32, the motor 22 is vertically and horizontally All vibrations in the front-rear direction can be absorbed by the O-ring with a good balance.

  The motor mount structure according to the present invention has been described above with reference to the drawings. However, the motor mount structure according to the present invention is not limited to the above-described structure. The motor mount structure according to the present invention has a specific shape as long as the O-ring 33 holds the motor 22 by three-surface pressure contact and the pressure is uniformly applied to the O-ring 22 by the three-surface pressure contact. The structure may be different from the embodiment. Further, the O-ring 33 may be anything as long as it is an elastic body having an annular shape and can suppress vibration. Furthermore, the cylindrical convex part 32 may be installed only on one end surface of the main body part 30.

It is the top view which showed the internal structure of the actuator for vehicles provided with the motor mount structure which concerns on this invention. It is the perspective view which showed the mount bracket and motor in the motor mount structure concerning this invention. It is the top view which showed the internal structure of the actuator for vehicles provided with the conventional motor mount structure.

Explanation of symbols

1,21 Actuator (Vehicle actuator)
2, 22 Motor 3, 31 Rotating shaft (drive shaft)
4, 5, 6, 23, 24, 25 Medium gear 7, 26 Output gear 8, 27 Printed circuit board 9, 28 Motor case 10, 30 Main body 10a, 30a Front end face 10b, 30b Rear end face 11, 32 Columnar convex part 11a, 32a Peripheral surface 12, 33 O-ring (annular elastic body)
13, 36, 37 Mount bracket 14 Groove 38 Tapered surface (inclined surface)

Claims (3)

A motor in which a cylindrical convex portion protruding in the extending direction of the rotation shaft is formed on at least one end surface of the front end surface or the rear end surface;
An annular elastic body that is inserted through the cylindrical convex portion and contacts the peripheral surface of the cylindrical convex portion and the end surface;
A mounting bracket for fixing the motor to the motor case via the annular elastic body;
A motor mounting structure comprising:
A motor mount structure, wherein a contact surface of the mount bracket with the annular elastic body is constituted by an inclined surface that urges the annular elastic body to the peripheral surface and the end surface.   2. The inclined surface is a tapered surface formed by reducing a diameter of an opening end surface having a circular shape in a front view formed on the mount bracket from the end surface side in the extending direction. The motor mount structure described in 1. A vehicle actuator comprising the motor mount structure according to claim 1.

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