JP5155626B2 - Automatic door drive source - Google Patents

Description

  The present invention relates to a drive source for an automatic door.

  Conventionally, an automatic door drive source 202 shown in FIGS. 6 to 8 has been disclosed (see Patent Document 1).

  The automatic door drive source 202 is used together with the speed reducer 230.

  The drive source 202 has a drive source output shaft 204 at substantially the center thereof. The drive source output shaft 204 is supported by the bearing at two points and is rotatable with respect to the casing 222. A permanent magnet 244 is installed and fixed on the drive source output shaft 204 via a rotor yoke 240 at substantially the center in the axial direction. Further, the stator yoke 248 is disposed so as to have a slight gap G2 from the surface of the permanent magnet 244. The stator yoke 248 is fixed to the inner peripheral surface of the casing 222. In the stator yoke 248, a plurality of armature coils 242 are installed in such a manner as to penetrate the interior of the stator yoke 248 in the axial direction (as a result of being wound around the portion of the teeth 248A in FIG. 8).

  A hypoid pinion 212 of the speed reducer 230 is formed directly on the drive source output shaft 204 and meshes with the hypoid gear 216 of the speed reducer 230. The hypoid gear 216 is incorporated in the reduction gear output shaft 214. The meshing of the hypoid pinion 212 and the hypoid gear 216 changes the rotation of the drive source output shaft 204 in the orthogonal direction and outputs it in a decelerated state.

JP 2004-266980 A

  Although automatic doors are rapidly spreading in various places in recent years, a problem in installing automatic doors is securing the installation space for the drive source. In other words, a drive source having a torque capacity sufficient to drive a door with a suitable weight at a suitable speed must be accommodated in a limited installation space that can be secured. This problem becomes a big problem especially when an existing manual door is replaced with an automatic door, but in this respect, the conventional drive source is not necessarily a compact configuration.

  Recently, the smoothness of opening and closing when the power is turned off (when the automatic door is not in operation) has been highlighted. In recent years, the development of magnetic materials has progressed, and motors that are smaller and more efficient than before have been developed. These types of high-efficiency motors are switched off during power outages or automatic doors. When opening and closing manually for a short time, there is a problem that the opening and closing becomes rather heavy (compared to a normal door not equipped with an automatic door drive source).

  The present invention has been made to solve such a conventional problem, and is capable of reducing the load of opening and closing when the automatic door is not operated while suppressing the increase in size of the apparatus. The challenge is to provide a source.

The present invention is a drive source of an automatic door used for driving an automatic door, and is integrated with the drive source output shaft, a drive source output shaft for taking out the rotation output, and concentric with the drive source output shaft. A rotor yoke, a permanent magnet concentric with the rotor yoke and integrated with the rotor yoke, concentric with the permanent magnet, and disposed so as to be relatively rotatable in the circumferential direction facing the permanent magnet in the radial direction; A plurality of armature coils wound flat without having a magnetic material on the same radius, a stator yoke concentric with the armature coils and integrated with the armature coils , and the drive The source output shaft is a member in which an orthogonal pinion is integrally cut and formed, and a value obtained by dividing the total length of the drive source output shaft by the maximum diameter is 6.0 or less and subjected to heat treatment. by being configured, the It is intended to solve the problem.

  According to the present invention, the stator yoke can be formed in a simple cylindrical shape, and the thickness in the radial direction can be suppressed, and accordingly, the gap between the rotor and the stator is relatively set radially outside the drive source output shaft. Can be configured. That is, when the magnetic force generation position for rotating the drive source output shaft is separated from the axis of the drive source output shaft, the rotational torque for rotating the drive source output shaft is increased without using a magnetic material such as an iron core. It can be secured. It is also possible to increase the surface area of a permanent magnet or an armature coil that generates a magnetic force for rotating the drive source output shaft. Then, for example, in comparison with a geared motor having the same casing outer diameter and the same output, the axial length of the rotor or stator can be shortened accordingly.

  In addition, while obtaining such merits, the stator yoke according to the present invention has a simple cylindrical shape (no so-called teeth (slots)), and the armature coil has an iron core or the like on the same radius. It is wound flat without having a magnetic material. Therefore, the opening / closing resistance when the automatic door is manually opened / closed when the automatic door is not operated is extremely small, and pulsation is hardly generated (details will be described later). As a technique often used to reduce the opening and closing load when the automatic door is not activated, a clutch mechanism is interposed in one of the power transmission paths that drive the automatic door, and the power from the automatic door side is transmitted to the drive source side. However, this requires the clutch mechanism to be arranged separately from the original power transmission system, which has the major disadvantage of increasing the size of the device itself and reducing the degree of freedom of installation. End up. Further, it is complicated to manually release the clutch, and it does not eliminate the trouble of turning on / off the main power of the automatic door. According to the present invention, without using a clutch mechanism or the like, as a result, even when the power is off, the automatic door can be moved with a lighter force than before, and a drive source for the automatic door that is very convenient to use can be obtained.

The permanent magnet and the armature coil rotate relatively, but the gist of the present invention can be realized regardless of which is disposed on the rotor yoke side or the stator yoke side. That is, the present invention is a drive source for an automatic door used for driving an automatic door, and is a drive source output shaft for taking out a rotation output, concentric with the drive source output shaft, and integrated with the drive source output shaft. A cylindrical rotor yoke, an armature coil concentric with the rotor yoke and flattened without having a magnetic material on the same radius, and integrated with the rotor yoke, and concentric with the armature coil, And a permanent magnet disposed so as to be rotatable relative to the armature coil in the circumferential direction in a radial direction, and a stator yoke concentric with the permanent magnet and integrated with the permanent magnet , The drive source output shaft has a shape in which an orthogonal pinion is integrally cut and formed, and a value obtained by dividing the total length of the drive source output shaft by the maximum diameter is 6.0 or less, and heat treatment is performed. that is composed of the members A drive source for an automatic door according to symptoms, can be considered in the form of.

  It is possible to obtain an automatic door drive source capable of reducing the load of opening and closing when the automatic door is not operated while suppressing an increase in the size of the apparatus.

  Hereinafter, an example of an embodiment according to the present invention will be described in detail with reference to the accompanying drawings.

  1 is a front sectional view of an automatic door drive source 102 as an example of an embodiment according to the present invention, FIG. 2 is a side sectional view thereof, and FIG. 3 is a sectional view taken along line III-III in FIG. FIG. 4 and FIG. 4 are overall structural views of an automatic door using the drive source 102.

  This automatic door drive source 102 is used together with a reduction gear 130. When the output shaft 114 of the speed reducer 130 drives the pulley 302, for example, the automatic door 303 is opened and closed via the door drive belt 301 (see FIG. 4).

  In this embodiment, the reduction gear 130 has an orthogonal gear set GS including a hypoid pinion 112 and a hypoid gear 116.

  The drive source 102 includes a drive source output shaft 104 that extracts rotational output, a rotor yoke 140, an armature coil 142, a permanent magnet 144, and a stator yoke 148, all concentrically with each other. Details will be described below.

  A drive source output shaft 104 (integrally formed in this embodiment) connected to the input shaft of the speed reducer 130 so as to be able to transmit power is disposed at substantially the center of the drive source 102. The front end of the drive source output shaft 104 is rotatably supported by the front cover 122c via a bearing 138. The rear end of the drive source output shaft 104 is rotatably supported by the end cover 122a by a bearing 136. The front cover 122c and the end cover 122a are integrally connected and fixed by a bolt 124 via a drive source casing body 122b. The front cover 122c, the drive source casing body 122b, and the end cover 122a constitute a drive source casing 122.

  On the other hand, on the drive source output shaft 104, a rotor yoke 140 is provided around the center in the axial direction so as to be integrally rotatable. Further, a permanent magnet 144 is fixed to the outer side of the rotor yoke 140 in the radial direction. In the present embodiment, the permanent magnets 144 are arranged so that the polarities sequentially differ over the circumference of the rotor yoke 140. The rotor yoke 140 and the permanent magnet 144 constitute a “rotor”.

  A substantially cylindrical coil holder 149 is disposed on the outer side in the radial direction of the permanent magnet 144 via a predetermined gap G1, and a plurality of armature coils are disposed between protrusions protruding outward in the radial direction of the coil holder 149. 142 is fixed. That is, the armature coil 142 is disposed so as to be able to rotate relative to the permanent magnet 144 in the circumferential direction (via the coil holder 149) in a radial direction. The armature coil 142 is fixed to the stator yoke 148. The stator yoke 148 is provided around the inner peripheral surface of the drive source casing main body 122b.

  Here, the drive source casing main body 122b has a cylindrical shape, and the stator yoke 148 also has a simple cylindrical shape and does not include a conventional tooth (slot). Each armature coil 142 is coated (molded) with an insulating resin and wound around an air core and flat. That is, no magnetic material such as an iron core is disposed on the same radius as the armature coil 142.

  The axial length (inner diameter) d1 of the inner circumference of the armature coil 142 is set to be shorter than the axial length W1 of the stator yoke 148. The axial length d1 of the inner periphery of the armature coil 142 is set to be shorter than the axial length W2 of the rotor yoke 140. The stator yoke 148 and the armature coil 142 constitute a “stator (stator)”.

  A hypoid pinion 112 is directly cut at the tip of the drive source output shaft 104. That is, the drive source output shaft 104 is formed integrally with the input shaft of the speed reducer 130, and the hypoid pinion 112 that is an input pinion of the speed reducer 130 is also formed integrally with the drive source output shaft 104. . The hypoid pinion 112 meshes with the hypoid gear 116 of the speed reducer 130. The hypoid gear 116 is installed and fixed so as to be rotatable integrally with the reduction gear output shaft 114. Further, the reduction gear output shaft 114 is rotatably supported by the reduction gear casing main body 120a via the bearing 106. Further, it is rotatably supported by the output shaft cover 120b via the bearing 108. An output shaft cover 120b is installed and fixed to the reduction gear casing main body 120a by bolts 132. The output shaft cover 120b is installed in such a manner that the output shaft 114 penetrates a part of the output shaft cover 120b. The reduction gear casing body 120a and the output shaft cover 120b constitute a reduction gear casing 120.

  In the present embodiment, the front cover 122c constituting the drive source casing 122 and the reduction gear casing main body 120a constituting the reduction gear casing 120 are integrally formed. Reference numerals 150 and 152 denote oil seals.

  Next, the operation of the drive source 102 of the automatic door 303 will be described.

  When the armature coil 142 is energized, a magnetic field is generated in the armature coil 142 accordingly. The timing, direction, strength, and the like of the current flowing through the armature coil 142 are appropriately controlled by a driver (not shown). By the attraction and repulsion action between the magnetic field generated by the armature coil 142 and the magnetic field of the permanent magnet 144. The permanent magnet 144 rotates around the drive source output shaft 104. This rotation is transmitted to the drive source output shaft 104 via the rotor yoke 140, and the drive source output shaft 104 rotates. The rotation of the drive source output shaft 104 is transmitted to a hypoid gear 116 that rotates the hypoid pinion 112 formed at the tip of the drive source output shaft 104 and meshes with the hypoid pinion 112. Due to the meshing of the hypoid pinion 112 and the hypoid gear 116, the rotation of the drive source output shaft 104 is decelerated and transmitted to the reducer output shaft 114. Moreover, the rotation direction is converted into a direction orthogonal to this meshing.

  As shown in FIG. 4, since the reduction gear output shaft 114 is engaged with the pulley 302, the pulley 302 rotates with the rotation of the reduction gear output shaft 114. As the door drive belt 301 rotates by the rotation of the pulley 302, the automatic door 303 connected to the door drive belt 301 is opened and closed.

  In the present embodiment, the armature coil 142 is formed in an air-core and flat shape, and a cylindrical stator yoke 148 is fixed to the outer side in the radial direction.

  Thereby, the following effects are obtained.

  One of them is smoothness when the automatic door 303 is opened and closed during non-operation (when the drive source 102 of the automatic door 303 is powered off).

  FIG. 5 shows a comparison of the reverse torque between the present embodiment and the conventional example (the examples in FIGS. 6 and 7). In FIG. 5, (A) is a static reverse rotation torque (starting torque required to start opening / closing the automatic door) ST1 when the automatic door drive source 102 according to the present embodiment is not in operation (when the power is off) ST1, B) is also a dynamic reverse torque (sliding torque for continuing the movement of the door after the door starts to move) DT1. Also. (C) and (D) are the static reverse torque ST2 and the dynamic reverse torque DT2 of the conventional automatic door drive source 202 corresponding to (A) and (B), respectively.

  As is clear from FIG. 5, the maximum value ST1m (immediately before opening and closing) of the static reverse torque ST1 of the automatic door drive source 102 according to this embodiment is the static reverse torque of the conventional automatic door drive source 202. Compared to the maximum value ST2m of ST2 (immediately before opening and closing), it can be confirmed that the value is reduced to about 1/3 or less. The average value DT1a of the dynamic reverse torque DT1 of the automatic door drive source 102 according to the present embodiment is about 1 / compared to the average value DT2a of the static reverse torque DT2 of the conventional automatic door drive source 202. It is reduced to 2.5 or less.

  The second effect is the disappearance of the pulsating torque.

  As is clear from FIG. 5D, in the conventional dynamic reverse torque DT2, intense pulsation (so-called cogging torque) was generated. This pulsating torque never appears in normal doors (other than automatic doors). Therefore, the person who opens and closes the door easily senses that this is a torque feeling because it is an automatic door, and the cause of more strongly realizing that the opening and closing torque is “increasing” (psychological weight feeling) It is thought that it was. As is apparent from the graph of FIG. 5B, this pulsating torque is hardly seen in the dynamic reverse torque DT1 according to the present embodiment. That is, in this embodiment, the values of the static reverse torque ST1 and the dynamic reverse torque DT1 are smaller than the values of the conventional static reverse torque ST2 and the dynamic reverse torque DT2, respectively. Since there is almost no pulsation of the reverse rotation torque DT1, the automatic door can be opened and closed very smoothly at the time of a power failure or when the power is turned off without experiencing a feeling of psychological weight, and convenience is greatly increased.

  The third effect is the realization of compactness.

  The configuration according to the present embodiment eliminates the need for a space for winding the armature coil in the interior (tooth portion) of the stator yoke itself as in the prior art, and makes it possible to suppress the radial thickness of the stator yoke 148 itself. . As a result, the gap between the “rotor (rotor)” and the “stator (stator)” can be configured more radially outward of the drive source output shaft 104 as the stator yoke 148 becomes thinner. Become. That is, the generation position of the rotational force for rotating the drive source output shaft 104 can be separated from the axis of the drive source output shaft 104 (in the case of the same casing outer diameter). Rotational torque that can rotate the can be increased. It is also possible to increase the surface area of the field generating means such as the permanent magnet 144 and the armature coil 142 that generate magnetic force for rotating the drive source output shaft 104. As a result, the axial length of the field generating means can be shortened accordingly. Further, since it is an air-core coil, the axial length d1 of the inner periphery of the armature coil 142 can be configured to be shorter than the axial lengths W1 and W2 of the rotor yoke 140 and the stator yoke 148. As a result, the axial length (outer diameter) D1 of the outer periphery of the armature coil 142 can be made shorter than the conventional one (the drive source 202 in FIGS. 6 to 8). That is, the length of the drive source output shaft 104 itself can be shortened. Even in such a configuration, it is possible to ensure an output torque comparable to that in the conventional case.

  The fourth effect is to avoid the occurrence of defects due to heat treatment.

  When the hypoid pinions 112 and 212 are directly cut at the tips of the drive source output shafts 104 and 204 as in the present embodiment and the above-described conventional example, the drive source output shafts 104 and 204 are simply connected to the drive sources 102 and 202. In addition to the role of taking out the rotational force, it also has a function as an input shaft of the speed reducers 130 and 230 (a rotary shaft of the hypoid pinions 112 and 212). Therefore, the drive source output shafts 104 and 204 are subjected to a predetermined heat treatment to withstand the load and wear caused by the meshing, but due to these heat treatments, the drive source output shafts 104 and 204 are subjected to distortion such as “warping” due to heat. Will inevitably occur. Needless to say, such distortion causes uneven rotation of the rotating system including the drive source output shaft 204, and causes vibration and noise. In the case of the use of “automatic door opening and closing”, since silence is required, a process of removing this distortion (straight rod) is indispensable. Specifically, a method of rotating (rolling) the shaft while applying an appropriate pressure from the outside in the radial direction of the drive source output shaft in which distortion has occurred is employed. However, since it is not possible to use a general machine in any factory, both cost and time are required. Conventionally, this has led to increased costs and increased processing time.

  The distortion of the shaft caused by such heat treatment increases as the member to be processed (drive source output shaft) is longer (more precisely, the value obtained by dividing the total length of the drive source output shaft by the maximum diameter of the drive source output shaft). And so on) From the opposite viewpoint, if a drive source output shaft having a shorter axial length relative to the diameter can be mounted as in this embodiment (for example, the total length of the drive source output shaft is the maximum of the drive source output shaft). If the drive source output shaft having a value divided by the diameter of 6.0 or less can be obtained, for example, the distortion of the drive source output shaft accompanying heat treatment can be reliably reduced. If the distortion of the drive source output shaft accompanying 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. .

  Furthermore, although the permanent magnet and the armature coil rotate relatively, the gist of the present invention can be realized regardless of which is disposed on the rotor yoke side or the stator yoke side. That is, the present invention is a drive source for an automatic door used for driving an automatic door, and is a drive source output shaft for taking out a rotation output, concentric with the drive source output shaft, and integrated with the drive source output shaft. A cylindrical rotor yoke, an armature coil that is concentric with the rotor yoke and is flattened without having a magnetic material on the same radius, and integrated with the rotor yoke, and concentric with the armature coil And a permanent magnet that is arranged to face the armature coil in a radial direction so as to be relatively rotatable in the circumferential direction, and a stator yoke that is concentric with the permanent magnet and integrated with the permanent magnet. You may implement as another structure.

  The present invention can be used as a drive source for opening and closing a door.

The front sectional view which shows a mode that the drive source of the automatic door which is an example of embodiment concerning this invention is used with the reduction gear Side sectional view of the above example Sectional view along arrow III-III in FIG. Overall configuration diagram of an automatic door using an automatic door drive source The graph which showed the reverse torque characteristic with the said embodiment compared with the prior art example Front sectional view showing how the conventional automatic door drive source is used with a reduction gear Side sectional view of the above conventional example Sectional view along the arrow VIII-VIII line in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 102 ... Drive source of automatic door 104 ... Drive source output shaft 106,108,136,138 ... Bearing 112 ... Hypoid pinion 114 ... Output shaft 116 ... Hypoid gear 120 ... Speed reducer casing 120a ... Speed reducer casing main body 120b ... Output shaft cover 122 ... Drive source casing 122a ... End cover 122b ... Drive source casing body 122c ... Front cover 124 ... Bolt 130 ... Speed reducer 140 ... Rotor yoke 142 ... Armature coil 144 ... Permanent magnet 148 ... Stator yoke 150, 152 ... Oil seal 301 ... Door Drive belt 302 ... pulley 303 ... automatic door L1, L2 ... drive source output shaft length

Claims (4)

An automatic door drive source used for driving an automatic door,
A drive source output shaft for extracting rotational output;
A rotor yoke concentric with the drive source output shaft and integrated with the drive source output shaft;
A permanent magnet concentric with and integrated with the rotor yoke;
A plurality of armature coils that are concentric with the permanent magnet and arranged in a circumferential direction so as to be able to rotate relative to the permanent magnet in a circumferential direction and are flatly wound without having a magnetic material on the same radius; ,
A stator yoke concentric with the armature coil and integrated with the armature coil , and
The drive source output shaft is formed by orthogonally cutting an orthogonal pinion integrally, and the heat source output shaft is subjected to heat treatment after having a value obtained by dividing the total length of the drive source output shaft by the maximum diameter of 6.0 or less. A drive source of an automatic door, characterized in that it is composed of members . An automatic door drive source used for driving an automatic door,
A drive source output shaft for extracting rotational output;
A cylindrical rotor yoke concentric with the drive source output shaft and integrated with the drive source output shaft;
An armature coil that is concentric with the rotor yoke and wound flat without having a magnetic material on the same radius, and integrated with the rotor yoke;
A permanent magnet that is concentric with the armature coil and is disposed so as to be rotatable relative to the armature coil in a radial direction in a circumferential direction;
A stator yoke concentric with the permanent magnet and integrated with the permanent magnet , and
The drive source output shaft is formed by orthogonally cutting an orthogonal pinion integrally, and the heat source output shaft is subjected to heat treatment after having a value obtained by dividing the total length of the drive source output shaft by the maximum diameter of 6.0 or less. A drive source of an automatic door, characterized in that it is composed of members . In claim 1 or 2 ,
The automatic door drive source, wherein an axial length of an inner periphery of the armature coil is shorter than an axial length of the rotor yoke. In any one of Claims 1-3 ,
The automatic door driving source, wherein an axial length of an inner circumference of the armature coil is shorter than an axial length of the stator yoke.

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