KR20090023222A - Driving source of automatic door - Google Patents

Abstract

A driving source of automatic door is provided to prevent thickness of radial direction of a stator yoke by removing a space for winding an armature coil of a stator yoke. A driving source(102) of an automatic door comprises a driving source output axis(104), a rotor yoke(140), a permanent magnet(144), a plurality of armature coils(142), and a stator yoke. The driving source output axis draws out a rotation output. The rotor yoke is concentric with the driving source output axis. The permanent magnet is concentric with the rotor yoke, and is integrated with the rotor yoke. A plurality of armature coils is concentric with the permanent magnet, and is opposite into a radial direction with the permanent magnet. The stator yoke is concentric with the armature coil, and is integrated with the armature coil.

Description

Driving source of automatic doors

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

Conventionally, the drive source 202 of the automatic door shown in FIGS. 6-8 is disclosed (refer patent document 1).

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

The drive source 202 has a drive source output shaft 204 at its center. The drive source output shaft 204 is supported by the bearing at two points and is rotatable with respect to the casing 222. The permanent magnet 244 is fixed to the drive source output shaft 204 via the rotor yoke 240 at an approximately center in the axial direction. In addition, the stator yoke 248 is disposed to have a slight gap G2 from the surface of the permanent magnet 244. The stator yoke 248 is fixed to the inner circumferential surface of the casing 222. In the stator yoke 248, a plurality of armature coils 242 penetrate the inside of the stator yoke 248 in the axial direction (as a result, wound around the tooth 248A part of FIG. 8). Installed).

The hypoid pinion 212 of the reducer 230 is directly cut and formed in the drive source output shaft 204, and meshes with the hypoid gear 216 of the reducer 230. The hypoid gear 216 is provided in the reducer output shaft 214. By engaging the hypoid pinion 212 and the hypoid gear 216, the rotation of the drive source output shaft 204 is changed in the orthogonal direction and outputted in a decelerated state.

[Patent Document 1] Japanese Patent Publication No. 2004-266980

BACKGROUND ART Although automatic doors are rapidly spreading in various places in recent years, a problem in installing automatic doors is securing the space for installation of this driving source. In other words, a drive source having a sufficient torque capacity for driving a door of a corresponding weight at a corresponding speed in a limited installation space that can be secured must be accommodated. This problem becomes a big problem especially when replacing an existing manual door with an automatic door. In this respect, it is difficult to say that the conventional drive source is necessarily a compact configuration.

In addition, recently, the close-up is the smoothness of opening and closing when the power is off (non-operation of the automatic door). In recent years, magnetic materials have also been developed, and smaller and more efficient motors have been developed. However, this type of high-efficiency motor can be operated manually for minor reasons during power outages or when the operation switch of the automatic door is turned off. In the case of opening / closing with a door, there is a problem that opening / closing becomes heavy (compared to a normal door without a driving source of an automatic door).

This invention is made | formed in order to solve such a conventional problem, and makes it the subject to provide the drive source of the automatic door which can reduce the load of opening and closing at the time of non-operation of an automatic door, suppressing the enlargement of an apparatus. .

The present invention provides a drive source for an automatic door used for driving an automatic door, comprising: 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, and concentric with the rotor yoke; In addition, the permanent magnet integrated with the rotor yoke and the permanent magnet concentrically and radially opposed to the permanent magnet are arranged so as to be rotated in the circumferential direction, and have no magnetic material on the same radius. The above-mentioned problem is solved by having a configuration including a plurality of wound armature coils and a stator yoke concentric with the armature coils and integrated with the armature coils.

According to the present invention, the stator yoke can be made into a simple cylindrical shape, and the thickness in the radial direction can be suppressed, so that the gap between the rotor and the stator can be configured relatively radially outward of the drive source output shaft. do. That is, the position where the magnetic force for rotating the drive source output shaft falls from the shaft center of the drive source output shaft can secure a large rotational torque for rotating the drive source output shaft without using magnetic materials such as iron cores in combination. In addition, it is possible to take a large surface area of a permanent magnet, an armature coil, and the like, which generate a magnetic force for rotating the drive source output shaft. Then, for example, in comparison with a geared motor having the same outer diameter and the same output, the length of the rotor and the stator in the axial direction can be shortened.

Moreover, while obtaining such a merit, the stator yoke according to the present invention has a simple cylindrical shape (without a so-called tooth (slot)), and the armature coil is flat without having a magnetic material such as an iron core on the same radius. It is wound up. For this reason, the opening / closing resistance at the time of opening and closing an automatic door manually at the time of non-operation of an automatic door is extremely small, and a pulsation feeling hardly arises (it mentions later). As a method frequently used to reduce the opening and closing load when the automatic door is inactive, a clutch mechanism is provided on either side of the power transmission path for driving the automatic door so that power from the automatic door side is not transmitted to the driving source side. In order to do this, it is necessary to arrange the clutch mechanism separately from the original power transmission system, which entails a large disadvantage that the size of the device itself is increased and the degree of freedom of mounting is reduced. In addition, manually releasing the clutch is cumbersome and does not solve the trouble of turning on and off the main power supply of the automatic door. According to the present invention, a clutch mechanism or the like is not used, and as a result, even when the power supply is off, the automatic door can be moved with a lighter force than before, so that a driving source of the automatic door which is extremely usable is obtained.

In addition, although the permanent magnet and the armature coil are relatively rotated, the object of the present invention is realized even if either of them is arranged on the rotor yoke side or on the stator yoke side. That is, the present invention is a drive source for an automatic door used for driving an automatic door, comprising: 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; The armature coil integrated with the rotor yoke by being wound concentrically with the rotor yoke and having no magnetic material on the same radius, and concentrically with the armature coil and radially opposed to the armature coil in the circumferential direction It can also be regarded as a driving source of an automatic door characterized by having a permanent magnet disposed so as to be rotatable, and a stator yoke concentric with the permanent magnet and integrated with the permanent magnet.

The drive source of the automatic door which can reduce the load of opening and closing at the time of non-operation of an automatic door can be obtained, suppressing the enlargement of an apparatus.

Hereinafter, an example of the Example which concerns on this invention is described in detail using an accompanying drawing.

1 is a front cross-sectional view of a drive source 102 of an automatic door which is an example of an embodiment according to the present invention, FIG. 2 is a side cross-sectional view, and FIG. 3 is a cross-sectional view along the arrow III-III line in FIG. 1, FIG. 4 is an overall structural diagram of an automatic door using this drive source 102.

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

The reduction gear 130 has the orthogonal gear set GS which consists of the hypoid pinion 112 and the hypoid gear 116 in this embodiment.

The drive source 102 is provided with the drive source output shaft 104, the rotor yoke 140, the armature coil 142, the permanent magnet 144, and the stator yoke 148 concentrically with each other. This will be described below.

In the substantially center of the drive source 102, a drive source output shaft 104 is disposed (integrated in this embodiment) so as to be capable of power transmission with the input shaft of the speed reducer 130. The front end of the drive source output shaft 104 is rotatably supported by the front cover 122c via the bearing 138. The rear end of the drive source output shaft 104 is rotatably supported by the end cover 122a by the bearing 136. The front cover 122c and the end cover 122a are integrally connected and fixed by the bolt 124 via the drive source casing main body 122b. The drive source casing 122 is comprised from the front cover 122c, the drive source casing main body 122b, and the end cover 122a.

On the other hand, the rotor yoke 140 is cast in the drive source output shaft 104 so that the rotor yoke 140 can be integrally rotated. In addition, the permanent magnet 144 is fixed to the radially outer side of the rotor yoke 140. In this embodiment, the permanent magnet 144 is disposed so that the polarity is sequentially changed over the circumference of the rotor yoke 140. Here, the rotor yoke 140 and the permanent magnet 144 constitute a "rotor".

A substantially cylindrical coil holder 149 is disposed on the radially outer side of the permanent magnet 144 through a predetermined gap G1, and a plurality of coils protrudes radially outwardly of the coil holder 149. Armature coil 142 is fixed. That is, in the armature coil 142 (via the coil holder 149), the permanent magnet 144 is radially opposed to the permanent magnet 144, and the permanent magnet 144 is disposed so as to be relatively rotatable in the circumferential direction. The armature coil 142 is fixed to the stator yoke 148. The stator yoke 148 is provided on the inner peripheral surface side 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 have teeth (slots) as in the prior art. In addition, each armature coil 142 is coated (molded) with an insulating resin and wound in an air core and flat. That is, magnetic materials such as iron cores are not disposed on the same radius as the armature coil 142.

Here, 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 circumference 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)".

The hypoid pinion 112 is cut and formed directly at the tip of the drive source output shaft 104. That is, the drive source output shaft 104 is integrally formed with the input shaft of the reducer 130, and the hypoid pinion 112, which is the input pinion of the reducer 130, is also integrally formed with the drive source output shaft 104. do. This hypoid pinion 112 meshes with the hypoid gear 116 of the reducer 130. The hypoid gear 116 is fixed to the reducer output shaft 114 so as to be integrally rotatable. In addition, the reduction gear output shaft 114 is rotatably supported by the reduction gear casing main body 120a via the bearing 106. In addition, the bearing 108 is rotatably supported by the output shaft cover 120b. The output shaft cover 120b is fixed to the reducer casing main body 120a by the bolt 132. The output shaft cover 120b is provided in such a manner that the output shaft 114 penetrates a part thereof. Moreover, the reducer casing 120 is comprised by this reducer casing main body 120a and the output shaft cover 120b.

In the present embodiment, however, the front cover 122c constituting the drive source casing 122 and the reducer casing main body 120a constituting the reducer 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. The timing, direction, and intensity of the current flowing through the armature coil 142 are properly controlled by a driver (not shown), and suction and repulsion of the magnetic field generated by the armature coil 142 and the magnetic field of the permanent magnet 144 have. By the action, the permanent magnet 144 rotates about the drive source output shaft 104. This rotation is transmitted to the drive source output shaft 104 via the rotor yoke 140, and this drive source output shaft 104 rotates. Rotation of the drive source output shaft 104 rotates the hypoid pinion 112 formed in the front-end | tip of this drive source output shaft 104, and is transmitted to the hypoid gear 116 which meshes with this hypoid pinion 112. As shown in FIG. By the engagement 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, by this engagement, the rotational direction is converted to the direction orthogonal.

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

In this embodiment, the armature coil 142 is formed to be in the form of a core and flat wound, and the cylindrical stator yoke 148 is fixed to the radially outer side thereof.

Thereby, the following effects are acquired.

The first is the smoothness of opening and closing the automatic door 303 during non-operation (when the driving source 102 of the automatic door 303 is powered off).

In Fig. 5, the reverse torque of the present embodiment and the conventional example (the previous examples of Figs. 6 and 7) are shown in comparison. In Fig. 5, (A) starts the static reversal torque (starting when opening and closing the automatic door) at the time of non-operation (power off) of the drive source 102 of the automatic door according to the present embodiment. The torques ST1 and B are similarly the dynamic reversal torques (slide torques for continuing the movement after the door starts to move) DT1. Further, (C) and (D) are the static inversion torque ST2 and the dynamic inversion torque DT2 of the drive source 202 of the conventional automatic door corresponding to (A) and (B), respectively.

As apparent from Fig. 5, the maximum value ST1m (just before opening / closing) of the static reversal torque ST1 of the drive source 102 of the automatic door according to the present embodiment is the static value of the drive source 202 of the automatic door of the conventional example. As compared with the maximum value ST2m (just before opening / closing) of the reversing torque ST2, it can be confirmed that it is reduced to about 1/3 or less. The average value DT1a of the dynamic reversal torque DT1 of the drive source 102 of the automatic door according to the present embodiment is equal to the average value DT2a of the static reversal torque DT2 of the drive source 202 of the automatic door of the conventional example. In comparison, it is reduced to about 1 / 2.5 or less.

The second effect is the disappearance of pulsating torque.

As apparent from Fig. 5D, in the conventional dynamic reversal torque DT2, severe pulsation (so-called cogging torque) has occurred. This pulsating torque never appears in a normal door (other than an automatic door). For this reason, it is thought that the person who opens or closes the door simply senses that it is a feeling of torque because it is an automatic door, and has become a cause (psychological weight) to realize more strongly that the opening and closing torque is "increasing". As apparent from the graph of Fig. 5B, this pulsating torque is hardly seen in the dynamic reversal torque DT1 according to the present embodiment. That is, in this embodiment, the values of the static reversing torque ST1 and the dynamic reversing torque DT1 are smaller than the values of the conventional static reversing torque ST2 and the dynamic reversing torque DT2, respectively. Since there is almost no pulsation of the reversing torque DT1, the automatic door can be opened and closed very smoothly at the time of power failure or when the power is turned off, without feeling psychological weight, and the convenience is greatly increased.

The third effect is the realization of compactness.

According to the configuration according to the present embodiment, a space for winding the armature coil inside the stator yoke itself (teeth portion) as in the prior art is unnecessary, and the thickness in the radial direction of the stator yoke 148 itself can be suppressed. Done. As a result, the gap between the "rotor (rotor)" and the "stator (stator)" can be formed in the radially outer side of the drive source output shaft 104 more as much as the stator yoke 148 becomes thinner. That is, the rotational torque which can rotate the drive source output shaft 104 by making the generation position of the rotational force for rotating the drive source output shaft 104 further away from the shaft center of the drive source output shaft 104 (in the case of the same casing outer diameter) is made. It can be made larger. Further, the surface area of the field generating means such as the permanent magnet 144 or the armature coil 142 which generates the magnetic force for rotating the drive source output shaft 104 can be made large. By doing so, it becomes possible to shorten the length of the field generating means in the axial direction. Moreover, since it is an air core coil, the axial length d1 of the inner periphery of the armature coil 142 can be shorter than the axial lengths W1 and W2 of the rotor yoke 140 and the stator yoke 148. As a result, also with respect to the axial length (outer diameter) D1 of the outer periphery of the armature coil 142, it can be set as shorter structure than the conventional (drive source 202 of FIGS. 6-8). That is, the length of the drive source output shaft 104 itself can be shortened. Moreover, even if it is comprised in such a structure, it becomes possible to ensure the output torque of the same grade as before.

The fourth effect is to avoid the problem caused by heat treatment.

In the case of the configuration in which the hypoid pinions 112 and 212 are cut directly at the ends of the drive source output shafts 104 and 204 as in the present embodiment or the conventional example, the drive source output shafts 104 and 204 are simply the drive sources 102 and 202. In addition to the role of drawing out the rotational force of, the function as the input shaft of the reduction gears 130 and 230 (function as the rotation axis of the hypoid pinion 112 and 212) is combined. Therefore, predetermined heat treatment is applied to the drive source output shafts 104 and 204 in order to withstand loads and wear caused by engagement. By these heat treatments, the drive source output shafts 104 and 204 are inevitably distorted such as "warping" due to heat. Will occur. Needless to say, such distortion causes the rotation unevenness of the rotation system including the drive source output shaft 204 and causes vibration and noise. In the case of the use of "opening and closing of the automatic door", since the quietness is required, the process of removing this distortion (straightening) becomes indispensable. Specifically, a method of rotating (rolling) the shaft or the like is employed while biasing an appropriate pressure from the radially outer side of the drive source output shaft where distortion has occurred. However, since it cannot be performed by the general machine in any factory, cost and time are also required, and conventionally, this has caused the high cost and the increase of processing time.

The distortion of the shaft caused by such heat treatment is more prominent as the member (drive source output shaft) to be processed is longer (more precisely, the total length of the drive source output shaft divided by the maximum diameter of the drive source output shaft). easy. On the contrary, if the drive source output shaft having a shorter axis length relative to the diameter can be mounted as in the present embodiment (for example, the total length of the drive source output shaft divided by the maximum diameter of the drive source output shaft is, for example, 6.0 or less). If the drive source output shaft can be provided), the distortion of the drive source output shaft accompanying the heat treatment can be reliably reduced. If the distortion of the drive source output shaft associated with the heat treatment can be reduced, the processing for taking the distortion (sealing process) can be simplified (or omitted), and the cost can be further reduced. I can keep it.

However, in the above embodiment, the hypoid pinion is directly formed on the drive source output shaft. However, in the present invention, the pinion of the speed reducer is not necessarily integrally formed on the drive source output shaft. In addition, the kind of pinion is not limited to a hypoid pinion, For example, pinions, such as a spur and a helical, may be sufficient. The kind of speed reducer is also not limited to the said structure.

In addition, although the permanent magnet and the armature coil are relatively rotated, the gist of the present invention can be realized even if either one 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, comprising: 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; The armature coil integrated with the rotor yoke by being wound concentrically with the rotor yoke and having no magnetic material on the same radius, and concentric with the armature coil and radially opposed to the armature coil in the circumferential direction The permanent magnet disposed so as to be capable of relative rotation and the stator yoke concentric with the permanent magnet and integrated with the permanent magnet may be implemented.

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

1 is a sectional front view showing a state in which a drive source of an automatic door which is an example of an embodiment according to the present invention is used together with a speed reducer.

2 is a side cross-sectional view of the above example.

FIG. 3 is a cross-sectional view along the arrow III-III line in FIG. 1. FIG.

4 is an overall configuration diagram of an automatic door using a drive source of the automatic door.

Fig. 5 is a graph showing the reverse torque characteristics compared with the above embodiment in comparison with the conventional example.

Fig. 6 is a front sectional view showing a state in which a drive source of the conventional automatic door is used together with a speed reducer.

7 is a side sectional view of the conventional example.

FIG. 8 is a cross-sectional view taken along the line VIII-VIII in FIG. 6. FIG.

* Description of the sign *

102: driving source of automatic door

104: drive source output shaft

106, 108, 136, 138: Bearing

112: hypoid pinion

114: output shaft

116: hypoid gear

120: reducer casing

120a: reducer casing body

120b: output shaft cover

122: drive source casing

122a: end cover

122b: drive source casing body

122c: front cover

124: Bolt

130: reducer

140: rotor yoke

142: armature coil

144: permanent magnet

148: Stator York

150, 152: oil seal

301: Door Driving Belt

302: pulley

303: Automatic Door

L1, L2: Drive source output shaft length

Claims (5)

As a driving source of an automatic door used for driving an automatic door, A drive source output shaft for drawing out a 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 the rotor yoke and integrated with the rotor yoke, A plurality of armatures which are concentric with the permanent magnet and are disposed so as to be rotated in the circumferential direction in a radial direction opposite to the permanent magnet, and are wound in a flat manner without having a magnetic material on the same radius; Coil and And a stator yoke concentric with the armature coil and integrated with the armature coil. As a driving source of an automatic door used for driving an automatic door, A drive source output shaft for drawing out a rotational output, A cylindrical rotor yoke concentric with the drive source output shaft and integrated with the drive source output shaft; An armature coil 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 which is concentric with the armature coil and is disposed in a circumferential direction to face the armature coil in a radial direction; And a stator yoke concentric with the permanent magnet and integrated with the permanent magnet. The method according to claim 1 or 2, An input shaft of the reducer is integrally formed on the drive source output shaft, and an input pinion of the reducer is formed integrally with the drive source output shaft. The method according to any one of claims 1 to 3, An axial length of the inner circumference of the armature coil is shorter than the axial length of the rotor yoke. The method according to any one of claims 1 to 4, An axial length of the inner circumference of the armature coil is shorter than the axial length of the stator yoke.

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