JP4313752B2 - Pinion integrated motor and door open / close geared motor - Google Patents

Description

  The present invention relates to a pinion integrated motor and a geared motor for opening and closing a door using the pinion integrated motor.

  In Patent Document 1, a geared motor GM201 shown in FIG. 3 is disclosed.

  The geared motor GM201 includes a pinion integrated motor 202 and a speed reducer 230.

  The pinion integrated motor 202 is called a radial gap type, and an opposing gap G2 between an armature coil (stator) having an iron core (core) 248 and a rotor magnet (rotor) 244 is a radial direction of the motor shaft 204. Is formed.

  A pinion 212 is directly cut on the motor shaft 204 and meshes with a gear 216 provided in the speed reducer 230. The gear 216 is incorporated in the output shaft 214. As a result, the rotation of the motor shaft 204 is changed to a right angle direction and output in a decelerated state.

  In the geared motor GM201, the pinion 212 is directly cut and formed on the motor shaft 204 as described above, but this reduces the number of parts by directly forming the pinion on the motor shaft and provides a low-cost (and compact) geared motor. This is to make it possible.

JP 2004-266980 A

  The motor shaft having the pinion directly cut at the tip has not only a function of taking out the rotational force (driving force) of the motor but also functions as a gear and a gear shaft in a broad sense.

  Therefore, this type of motor shaft is subjected to a predetermined heat treatment to withstand the load and wear caused by the meshing.

  However, these heat treatments cause distortion such as “warping” due to heat in the motor shaft.

  Such distortion of the motor shaft causes uneven rotation of the pinion integrated motor and causes vibration and noise. In particular, in a geared motor in which a pinion integrated motor and a speed reducer are integrated, if an orthogonal pinion (for example, bevel, hypoid, spiroid, worm, etc.) is formed on the motor shaft, it is easy to generate a large noise from the meshing structure. .

  Therefore, for example, when applied to an application requiring quietness, such as a geared motor for opening and closing a door, a process of removing distortion (straightening) is indispensable. As an example of this processing, there is a method of rotating (rolling) the shaft while applying an appropriate pressure from the outside in the radial direction of the motor shaft in which distortion has occurred. However, since it is not possible to use a general machine in any factory, both cost and time are required, resulting in a problem of high cost and long processing time.

  The present invention has been made to solve such a problem, and is a pinion-integrated motor that has low vibration and noise due to distortion of the motor shaft, while ensuring a low cost and a short delivery time. An object of the present invention is to provide an optimal geared motor for door opening and closing using a pinion integrated motor.

The present invention is, orthogonal pinion are straight cut integrally formed, and the heat treatment comprises a motor shaft which has been made, the opposing gap between the rotor and stator of themselves, formed in the axial direction of the motor shaft As a result, a motor shaft having a value obtained by dividing the shaft length of the motor shaft by the maximum shaft diameter as 6.0 or less can be used as the motor shaft, thereby solving the above problem.

  As a result, it is possible to mount a motor shaft having a short shaft length, and even if the motor shaft is mounted in a state where the pinion is directly cut, the amount of distortion generated by heat treatment can be reduced.

  According to the present invention, it is possible to obtain a pinion integrated motor with low vibration and noise due to distortion of the motor shaft and a geared motor for opening and closing a door using the pinion integrated motor while ensuring low cost and short delivery time. it can.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  1A and 1B are structural views of a geared motor GM101 for door opening and closing using a motor according to an embodiment of the present invention, where FIG. 1A is a front sectional view and FIG. 1B is a side sectional view. FIG. 2 is an overall structural view for opening and closing a door using the geared motor GM101 as the motor-equipped power transmission device 300. FIG.

  The geared motor GM101 is obtained by connecting the pinion integrated motor 102 and the speed reducer 130, and the output shaft 114 of the geared motor GM101 drives the pulley 302, thereby opening and closing the automatic door 303 via the door drive belt 301. To do. The reducer 130 is a one-stage orthogonal type having a hypoid pinion 112 and a hypoid gear 116.

  The motor shaft 104 of the pinion integrated motor 102 is mounted on the end cover 122a of the motor casing 122 via a bearing 136 and on the front cover 122c via a bearing 138, and is supported at two points. An armature coil (stator) 142 without a core is provided in the center of the main body 122b of the motor casing 122 and slightly near the front cover 122c, and a printed board 140 is attached to the armature coil 142. .

  A rotor magnet (rotor) 144 is opposed to the armature coil 142 in such a manner that the armature coil 142 is sandwiched from the axial direction of the motor shaft 104 via a facing gap G1. The rotor magnet 144 is attached to the motor shaft 104 via a back yoke 146, and a magnetic sensor (Hall IC, Hall element) 148 is installed in the vicinity of the rotor magnet 144.

  That is, the pinion integrated motor 102 is an axial gap type coreless brushless DC motor in which a facing gap G 1 between the rotor magnet 144 and the armature coil 142 is formed in the axial direction of the motor shaft 104.

  On the other hand, the hypoid pinion 112 is directly cut and formed at the tip of the motor shaft 104. That is, the motor shaft 104 also serves as the input shaft of the speed reducer 130. The hypoid pinion 112 faces the reduction gear casing 120 and meshes with the hypoid gear 116 in the reduction gear casing 120. The hypoid gear 116 is attached to the output shaft 114. The output shaft 114 is attached to the casing main body 120a of the reduction gear casing 120 via the bearing 106, and to the output shaft cover 120b via the bearing 108, respectively. With this configuration, the motor shaft 104 and the output shaft 114 are orthogonal to each other.

  The casing main body 120a of the reduction gear casing 120 and the front cover 122c of the motor casing 122 are integrally formed from the beginning.

  Next, the operation of the geared motor GM101 will be described.

  The magnetism of the rotor magnet 144 can be detected by the Hall IC 148, and the Hall IC 148 knows the rotational position (rotation angle) of the rotor magnet 144 based on this detected magnetism, and via an unillustrated driver, the armature coil The current supplied to 142 is controlled (brushless). When the armature coil 142 is energized in this way, a magnetic field is generated in the armature coil 142 accordingly. The rotor magnet 144 rotates around the motor shaft 104 due to attraction and repulsion with the magnetic field. Such rotation is transmitted to the motor shaft 104 via the back yoke 146 and is decelerated by the meshing of the hypoid pinion 112 and the hypoid gear 116. Further, the rotation direction is changed by 90 degrees by this meshing, and the rotation of the hypoid gear 116 is transmitted to the output shaft 114.

  The output shaft 114 is engaged with the pulley 302, and the pulley 302 also rotates as the output shaft 114 rotates. When the door drive belt 301 rotates by the rotation of the pulley 302, the automatic door connected to the door drive belt 301 is opened and closed.

  Here, in this embodiment, the opposing gap G1 between the armature coil (stator) 142 and the rotor magnet (rotor) 144 is secured in the axial direction (axial direction) of the motor shaft 104 in the radial direction (radial direction). ) (See FIG. 3L2), it is possible to mount a motor shaft having a shorter shaft length (L1).

  In addition, in this embodiment, by using a coreless brushless motor that does not use an iron core (core) that occupies a considerable volume inside the pinion-integrated motor, and that does not have a brush that requires a predetermined length in the axial direction, Furthermore, it is possible to mount a motor shaft 104 having a short shaft length.

  The distortion of the shaft caused by the heat treatment described above becomes more remarkable as the member to be processed (motor shaft) is longer (more precisely, the larger the value obtained by dividing the total length of the motor shaft by the maximum diameter of the motor shaft). Easy to appear. From the opposite viewpoint, if a motor shaft having a shorter axial length relative to the diameter can be mounted on the motor (for example, the value obtained by dividing the total length L of the motor shaft by the maximum diameter d of the motor shaft is 6. If the motor shaft can be 0 or less, the distortion of the motor shaft accompanying heat treatment can be reliably reduced.

  If the distortion of the motor shaft caused by the heat treatment can be reduced, the process for removing the distortion (straightening process) can be simplified (or omitted), the cost can be further reduced, and the silence can be maintained.

  In particular, when a geared motor is used to open and close the door, humans pass (position) in the vicinity of the installation position of the orthogonal type geared motor. Preventing vibration and noise by reducing and preventing generation is extremely effective, and is the usage mode in which the effects specific to the present invention are most apparent.

In the present invention, the speed reducer does not necessarily need to be a one-stage speed reducer, and a plurality of speed reducers can be used if necessary.

  In the above embodiment, the coreless brushless axial gap type motor is employed. However, the configuration of the coreless brushless is not necessarily essential.

  As a result, a geared motor capable of mounting a motor shaft with a short shaft length to prevent distortion of the motor shaft can be flexibly provided according to the application.

  The present invention has utility value as a drive source for opening and closing a door. In addition, it must be installed in the vicinity of humans (and animals in general), and therefore has high utility value as a drive source that requires low vibration and low noise.

BRIEF DESCRIPTION OF THE DRAWINGS It shows an example of the structure of the axial gap type hypoid geared motor which concerns on an example of embodiment of this invention, (A) is front sectional drawing, (B) is side sectional drawing. Overall structure diagram of door using the above geared motor as a power transmission device A conventional radial gap type hypoid geared motor is shown, (A) is a front sectional view and (B) is a side sectional view.

Explanation of symbols

GM101, GM201 ... hypoid geared motor 102, 202 ... pinion integrated motor 104, 204 ... motor shaft 106, 108, 136, 138 ... bearing 112, 212 ... hypoid pinion 114, 214 ... output shaft 116, 216 ... hypoid gear 120 ... deceleration Machine casing 120a ... Reducer casing body 120b ... Output shaft cover 122 ... Motor casing 122a ... End cover 122b ... Motor casing body 122c ... Front cover 124 ... Bolts 130, 230 ... Reducer 140 ... Print base 142 ... Armature coil (fixed) Child, stator)
144, 244 ... Rotor magnet (rotor, rotor)
248 ... Iron core
DESCRIPTION OF SYMBOLS 300 ... Power transmission device with a motor 301 ... Door drive belt 302 ... Pulley 303 ... Automatic door (wing)
L1, L2 ... Motor shaft length

Claims (3)

A motor shaft in which an orthogonal pinion is integrally formed by straight cutting and heat-treated ,
The opposing gap between its rotor and stator, by forming the axial direction of the motor shaft, a value obtained by dividing the maximum axial diameter axial length of the motor shaft is at 6.0 or less as the motor shaft A pinion-integrated motor characterized in that a motor shaft can be used . In claim 1 ,
The pinion integrated motor is a coreless brushless motor. A pinion integrated motor. An orthogonal pinion has a motor shaft that is integrally cut and heat-treated ,
The opposing gap between its rotor and stator, by forming the axial direction of the motor shaft, a value obtained by dividing the maximum axial diameter axial length of the motor shaft is at 6.0 or less as the motor shaft A pinion-integrated motor that can use a motor shaft ;
A reduction gear having an orthogonal gear that can mesh with the orthogonal pinion, and an output shaft that rotates with the rotation of the gear and that can be connected to a drive shaft that opens and closes the door. A geared motor for opening and closing doors.

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