JPH0870566A - Structure of coupling part of linear motor - Google Patents

Abstract

PURPOSE: To provide the structure of a coupling part of a linear motor where the pitches of magnets of a rail connection and the pitches of the electrode patterns of an armature may not be continuous. CONSTITUTION: In the coupling part between a rail body A and a rail body B, the pitches of permanent magnets 40a-40z and 50a-50z and the pitches of the electrode patterns of an armature are connected without being continuous, so in the coupling part, thrust does not occur in an armature 100b. But, a mover M consists of three pieces of armatures 100a, 100b, and 100c, and thrust occurs in the remaining two armatures 100a and 100c, so the mover M can move to in the specified direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting portion structure of a linear motor, and more particularly to an improvement of the connecting portion structure in a split type long moving coil type DC linear motor.

[0002]

2. Description of the Related Art At present, in houses, office buildings, hotels, etc., linear motors have been used for curtain rails for electrically opening and closing curtains. Here, in particular, in hotels and office buildings, long single-sided or double-sided curtain rails may be required. Here, if a linear motor (curtain rail) having a required length is integrally manufactured, not only is it difficult to pack and transport due to its full length, but also workability at the installation site is deteriorated. Therefore, a long curtain rail is divided into a plurality of pieces (usually divided into two pieces) and manufactured, and connected at an installation site to have a required length. Regarding the connection structure of this division type linear motor, for example, No. 4-72875 and No. 1
No. 62,778 and the like.

[0003]

However, in the conventional linear motor, as shown in FIG. 8, the pitch P1 of the permanent magnets 50 (for example, 24 mm) and the commutator 80 are provided at the connecting portion.
Since the pitch P2 of the electrode pattern (for example, 48 mm) is matched at the joint of the left and right rails, the length of the continuous left and right rails is the pitch P1 of the permanent magnet and the pitch P2 of the electrode pattern of the magnetic pole and the commutator 80. Since the magnetism of the permanent magnets must be arranged alternately over the entire linear motor rails including the connecting portions while matching at the joints, it was difficult to manufacture.

The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention that the pitch of the magnets in the rail connecting portion and the pitch of the electrode pattern of the commutator do not have to be continuous. Another object of the present invention is to provide a linear motor connecting portion structure that can be manufactured as separate left and right divided rails that do not need to take the magnetism of the magnets into consideration and can freely manufacture a curtain rail having a full length according to the application.

[0005]

In order to achieve the above object, in the linear motor connecting portion structure of the present invention, the rail main body A is adjacent to the rail main body A at the same pitch and with alternating polarities. A plurality of permanent magnets 40 fixed to the inner surface of A and three or more armatures 100a, 100b, 10
A mover M which is made of 0c and is loosely fitted in the rail body A;
The armatures 100a, 10a corresponding to the permanent magnets 40
Commutator 80 in which predetermined electrode patterns for supplying electric power to 0b and 100c are arranged at the same pitch, and each armature 10 attached to the mover M and in contact with the electrode patterns.
Brush 11 for supplying power to 0a, 100b, 100c
0, and the connection between the rail main body A and the rail main body B is performed without connecting the pitch P1 of the permanent magnet 40 and the pitch P2 of the electrode pattern of the commutator 80 to each other. It is characterized by having done.

In a preferred embodiment, the rail body A
At the connecting portion between the rail body B and the rail body B, the commutator 80 and the commutator 80 are connected to each other with the electrical non-conducting portion 200b interposed therebetween. Furthermore, in a preferred aspect, the non-conducting portion 20
The length of 0b corresponds to the non-conductive portion 200b of the brush 110.
The pair of commutators 80 connected with the interposition of is formed so as not to come into contact with each other at the same time. Still further, in a preferred aspect, the non-conducting portion 200b is formed as a part of the connecting member 200 that connects the rail body A and the rail body B.
Further, in a preferred aspect, a pair of recesses 202 having a thickness equal to the thickness of the commutator 80 for fitting the pair of commutator 80 adjacent to the non-conducting portion 200b are provided on the bottom surface 200a of the connecting member 200. It is provided.

[0007]

In the linear motor having the above structure, by applying a DC voltage to the electrode pattern of the commutator 80, the brushes are applied to the armatures 100a, 100b, 100c in accordance with the relative position to the magnetic pole of the permanent magnet 40. A current flows through 110 to generate a magnetic flux, which generates a thrust with the magnetic force of the permanent magnet 40 to move the mover M. Claim 1
In the linear motor connecting portion structure described in (1), the pitch of the permanent magnets 40 and the pitch of the electrode pattern of the commutator 80 are connected in the connecting portion between the rail body A and the rail body B without being continuous. Therefore, at the connecting portion, the armature 1
A state in which thrust is not generated at 00b may occur. But,
The mover M includes three or more armatures 100a, 100b, 10
0c and the remaining two or more armatures 100a, 100
Since the set thrust is generated in c, the mover M can be moved in a predetermined direction.

In the linear motor connecting portion structure according to the second aspect of the invention, since the electrical non-conducting portion 200b is interposed between the commutators 80, the commutators 80 are connected to each other. Prevent short circuit. Further, in the linear motor connecting portion structure described in claim 3, the brush 11
Since 0 does not come into contact with the pair of commutators 80 connected via the non-conducting portion 200b at the same time, it is possible to prevent a short circuit between the commutators 80 via the brush 110. Furthermore, in the linear motor connecting portion structure according to claim 4, since the non-conducting portion 200b is formed as a part of the connecting member 200 that connects the rail body A and the rail body B, The non-conducting part 200b can be constructed at low cost. Further, in the linear motor connecting portion structure described in claim 5, the connecting member 20 is provided.
Since the commutator 80 is fitted on the bottom surface 200a of 0, which is equal to the thickness of the commutator 80 provided adjacent to the non-conducting portion 200b, the commutator 80 and the non-conducting portion 20.
Since there is no step with 0b, the brush 110 can pass without receiving resistance.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. The linear motor of this embodiment is used for a left and right two-part curtain rail, and is composed of a right rail main body A and a left rail main body B. Here, first
The configuration of the linear motor of this embodiment will be described. FIG.
Is a cross-sectional view of the right rail body A, FIG. 2 is a perspective view of the mover, and FIG. 3 is a rail body A and a rail body B.
The commutator and the permanent magnet are shown. As shown in FIG. 1, this linear motor is composed of a longitudinal stator S and a mover M housed in the stator S so as to be slidable in the longitudinal direction. The stator S is provided with a casing 10 having a substantially inverted U-shaped cross section. Inside the casing 10, a pair of rails having a substantially U-shaped cross section is formed at an intermediate position between the pair of side walls 11 and 12 in the vertical direction. 20 and 30 are provided.

Band-shaped left and right permanent magnets 40 and 50 are respectively held in the rails 20 and 30 along the longitudinal direction thereof via yokes 60 and 70, respectively. The permanent magnet 40 has a plurality of magnetized portions 40a, 4a and 4b in its longitudinal direction.
0b, 40c, ... (see FIG. 3) are formed, and these magnetized portions 40a, 40b, 40c ,.
Also, as shown in FIG. 3, the permanent magnets 40 are magnetized in the plate thickness direction. In such a case, each magnetized portion 40a,
Of the 40b, 40c, ..., the magnetizing polarities of the magnetizing portions adjacent to each other are opposite to each other as shown in FIG.

On the other hand, the permanent magnets 50 are similarly magnetized in the plate thickness direction, and the magnetizing polarities of the adjacent magnetizing portions are opposite to each other, as shown in FIG. Further, the opposing magnetic poles of the two magnetized portions of the permanent magnets 40 and 50 that face each other have opposite magnetic polarities (see FIGS. 1 and 7). The magnetization pitch P1 of each magnetized portion of the permanent magnet 40 is 24 mm.
The magnetizing pitch of each magnetizing portion of the permanent magnet 50 is also the same.

A band-shaped commutator 80 is housed in the recess 14 formed on the inner surface of the upper wall 13 of the casing 10. The commutator 80 extends along the longitudinal direction thereof, as shown in FIG. Both electrode patterns 80a, 80b are formed in a pattern shape with a bent narrow gap 80c interposed therebetween, and this pattern includes a pair of permanent magnets 40 (for example, permanent magnets 40a,
40b) is repeated with a pitch P2 (48 mm).

As shown in FIG. 1, the mover M is slidably disposed between the left and right rails 20 and 30 in the casing 10 along the longitudinal direction thereof. This mover M
1 is a longitudinal plate-shaped head wall 9 as shown in FIGS.
This head wall 90 has both the left and right rails 20,
It is mounted on the upper walls 21 and 31 of 30 so as to be slidable in the longitudinal direction. Further, the mover M is provided with a rectangular parallelepiped body 100, and the body 100 is movable in the longitudinal direction from the center portion of the head wall 90 in the left-right direction between the opposite ends of the left and right rails 20, 30. (See FIG. 1). The body 100 includes three substantially columnar armatures 1.
00a, 100b and 100c, and these armatures 100a, 100b and 100c are molded in the body 100 so as to be parallel to each other as shown in FIG. The armature 100a includes a cylindrical core 101, and the axial direction of the core 101 is parallel to the magnetization directions of the magnetized portions of the permanent magnets 40 and 50 (that is, the longitudinal directions of the permanent magnets 40 and 50). Vertical to the direction). A coil 102 is wound around the outer periphery of the core 101, and the magnetization direction of the axis of the core 101 is determined according to the polarity of the DC voltage applied between both ends of the coil 102. The coil 102 has two collars 101a and 101b.
The core 101 is prevented from coming off. Further, the remaining armatures 100b and 100c have the same configuration as the armature 100a.

The mover M also includes a brush mechanism 110 provided on the upper surface 91 of the head wall 90. The brush mechanism 110 includes a pair of brushes 111, 112, 113, respectively.
It is composed of 114, 115 and 116. The pair of brushes 111 and 112 are formed to project on the front end portion of the upper surface 91 of the head wall 90 corresponding to the armature 100a, and the base portions 111 of the brushes 111 and 112 are formed.
a and 112a are head walls 9 corresponding to the axes of the armature 100a.
It is fixed to the left and right of the front end portion of the upper surface 91 of 0, respectively.
In addition, the brush 111 has a head wall 90 from the base 111a.
Of the tip 111
b contacts one of the two electrode patterns 80a, 80b of the commutator 80, while the brush 112 has its base 112a.
From the head wall 90 to the front and upward of the head wall 90 in an inclined manner, and the tip portion 112b of the head electrode 90 has both electrode patterns 80 of the commutator 80.
It is adapted to come into contact with one of a and 80b.

The pair of brushes 113, 114 is the armature 1.
00b, the upper surface 91 of the head wall 90 is formed so as to project at the central portion in the longitudinal direction, and the brush 113 has both electrode patterns 80a, 8a of the commutator 80 at the tip portion 113b.
0b, while the brush 114 is
Both electrode patterns 80a, 80b of the commutator 80 at 14b
It comes in contact with one side. A pair of brushes 11
5 and 116 are formed at the rear end of the upper surface 91 of the head wall 90 corresponding to the armature 100c, and the brush 115 is at the front end 115b of the brush 115.
The tip end 16b of the electrode 16 contacts one of the two electrode patterns 80a and 80b of the commutator 80. The pair of brushes 111 and 112 are respectively connected to both terminals of the coil 102, and the pair of brushes 113 and 11 are connected to each other.
4 is connected to both terminals of the coil of the armature 100b, and the pair of brushes 115 and 116 are the armature 1
00c is connected to both terminals of the coil.

A pair of horizontal grooves 16a and 16b are formed in the upper portion of the upper wall 13 of the casing 10 for fitting a connecting end 200 which will be described later. On the other hand, a curtain runner C for suspending the curtain is attached to the lower part of the casing 10.

Here, the connecting structure of the right rail body A and the left rail body B will be described with reference to FIGS. 4 to 6. FIG. 4 shows the left end of the rail body A on the right side,
And showing a coupling end 200 for connecting the rail body A to the left rail body B (note that only the right half of the coupling end 200 is shown here),
FIG. 5 shows the commutator 80 of the rail body A and the connecting end 20.
0 shows the side surface in the connected state, and FIG. 6 shows the DD cross section of FIG. As shown in FIG. 4, a cutout portion 13a of the upper wall 13 is formed in the left end portion of the rail body A so that the connecting portion end 200 can be fitted therein. The connection end 200
Is made of an insulating material, and a bottom surface 200a of which a pair of commutators 80 having a thickness equal to the thickness of the commutator 80 for fitting the commutator 80 of the rail body A and the commutator 80 of the rail body B as shown in FIG. Recesses 202, 202 are formed, and this recess 2
A non-conducting portion 200b is formed between 02 and the recess 202. Here, as shown in FIG. 5, a commutator 80,
The lower surface of 80 and the lower surface of the non-conducting part 200b are arranged so that there is no step so that the brush 110 does not receive resistance when passing through. The width γ of the non-conducting portion 200b is such that, when the brush passes, the tip portion (for example, the tip portion 111b) contacts the commutator 80 of the rail body A and the commutator 80 of the rail body B at the same time, It is formed wider than the contact width β of the tip end so that a short circuit does not occur between the commutators 80.

On the other hand, as shown in FIG.
Horizontal projections 204a and 204b are formed on both sides of 00. Further, the rail main body A is provided above the recess 202.
For passing the harnesses 260a, 260b between the commutator 80 of the rail body B and the commutator 80 of the rail body B.
b and groove portions 206a and 206b are formed. The harness connection cover 2 is provided on the upper portions of the grooves 206a and 206b.
50 is configured to be attached. The rail main body A and the rail main body B are connected to each other at the connecting end 200.
This is performed by fitting the horizontal protrusions 204a and 204b into the horizontal grooves 16a and 16b of the rail body A and the rail body B with the harness connection cover 250 attached.
At the same time, the electrode pattern 80a of the commutator 80 of the rail main body A and the electrode pattern 80a of the commutator 80 of the rail main body B are connected via the harness 260a.
The electrode pattern 80b of the commutator 80 of the rail body A and the electrode pattern 80b of the commutator 80 of the rail body B are connected via the harness 260b.

Here, the driving principle of the mover M in the connecting portion of the linear motor of this embodiment will be described with reference to FIG. FIG. 7 shows the polarities of the permanent magnets 40 and 50 at the connecting portion between the rail body A and the rail body B, and the armatures 100a and 1a.
The polarities of 00b and 100c are shown. The polarities of the permanent magnets 40 and 50 of the right rail main body A are arranged with reference to the right end (not shown), and permanent magnets 40z and 50z formed in arbitrary sizes are arranged at the connecting portion. Further, the polarities of the permanent magnets 40, 50 of the left rail main body B are arranged with reference to the left end (not shown), and permanent magnets 40y, 50y formed in arbitrary sizes are arranged at the connecting portion. That is, the left end of the rail main body A formed to have a constant length is cut to an arbitrary length, and the right end of the rail main body B is cut to an arbitrary length in the same manner. It is in a state of being connected via the conducting portion 200b.

It is assumed that the mover M is sent toward the left side in the figure. The armature 100a of the mover M is supplied with power via a brush and is magnetized to the polarity shown in the drawing to generate thrust toward the permanent magnets 40a ', 50a' of the left rail body B. The armature 100b is in a state where the brush is applied to the non-conducting portion 200b shown in FIG. 5 and power is not being supplied at present. Further, the armature 100c is magnetized to the polarity shown in the figure and generates thrust that repels from the permanent magnets 40a, 50a of the right rail body A. In this way, even if one armature does not generate thrust in the connecting portion, the other two armatures continue to generate thrust, so that the mover M can be sent in a predetermined direction. Further, even if one armature generates thrust in the opposite direction at the connecting portion, the other two armatures continue to generate thrust, so that the mover M can be sent in a predetermined direction.

In this embodiment, since the pitch of the magnets and the pitch of the electrode patterns of the commutator do not have to be continuous at the rail connecting portion, the linear motor can be constructed to have a desired length. For example, make a curtain rail with a certain length and cut it to the desired length.
It is also possible to connect 3 to 3. Also, the connecting end 20
Since the rail main body A and the rail main body B are connected using 0, the rail main body can be firmly connected. Further, since the commutator 80 of the rail body A and the commutator 80 of the rail body B are separated by the non-conducting portion 200b of the connecting portion end 200, a short circuit between the commutators 80, 80 can be prevented. That is, in the above-described embodiment, the commutator 80
Since the pitches of the electrode patterns are not matched, for example, the left end portion 80 of the commutator 80 of the right rail main body A shown in FIG.
When A and the right end portion 80B of the commutator of the left rail body B touch, the electrode pattern 80b on the rail body B side contacts the electrode pattern 80a on the rail body A side, and conversely the electrode pattern 80a on the rail body B side. Occurs in contact with the electrode pattern 80b on the rail body A side. This is prevented by interposing the non-conducting portion 200b between the commutators 80,80. Further, the non-conducting portion 200b is
Since it is formed as a part of the connecting portion end 200, it can be formed at low cost. Since the width γ of the non-conducting portion 200b is formed wider than the contact width β of the tip portion of the brush,
No short circuit will occur between the commutators 80, 80 via the brush tip. In addition, the recess 20 of the connecting end 200
2, 202 are formed to have the same thickness as the commutators 80, 80, and the step between the non-conducting portion 200b and the commutators 80, 80 is eliminated, so that the brush 110 does not receive resistance when passing through. .

In the embodiments described above, the divided structure of the linear motor used for the curtain rail has been described, but it goes without saying that the linear motor connecting portion structure of the present invention can be used for linear motors for applications other than the curtain rail. Yes. Further, in the above-mentioned embodiment, the configuration in which the linear motor is divided into two has been described, but the connecting portion structure of the linear motor of the present invention can be suitably used for the connecting portion of the linear motor divided into three or more. . Note that FIG.
In the example shown in (1), a gap is provided between the permanent magnets 40z and 40y and the permanent magnets 50z and 50y in the connecting portion, but it is also possible to arrange these permanent magnets so as to be in contact with each other.

[0023]

As described above, in the linear motor connecting portion structure of the present invention, the rail connecting portion does not need to have a continuous magnet pitch and commutator electrode pattern pitch. Then a linear motor can be connected. Also, the pitch of the magnet and the electrode pattern,
Further, since it is not necessary to consider the polarity of the magnet, it is possible to easily manufacture the split type linear motor.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a linear motor according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the mover shown in FIG.

FIG. 3 is an explanatory view showing a commutator and a permanent magnet.

FIG. 4 is a perspective view showing a connecting portion of the linear motor of FIG.

FIG. 5 is a side view of a connecting portion of a linear motor.

6 is a cross-sectional view taken along the line DD of FIG.

FIG. 7 is an explanatory diagram showing a commutator and a permanent magnet of the linear motor of this embodiment.

FIG. 8 is an explanatory diagram showing a commutator and a permanent magnet of a conventional linear motor.

[Explanation of symbols]

 M mover S Stator 40 Permanent magnet 50 Permanent magnet 80 Commutator 80a Electrode pattern 80b Electrode pattern 200 Coupling part end 200b Non-conducting part 202 Recess

Claims (5)

[Claims] 1. A rail main body, which comprises a plurality of permanent magnets fixed to the inner surface of the rail main body at the same pitch so as to be adjacent to each other with alternating polarities, and three or more armatures. A movable element to be fitted, a commutator in which predetermined electrode patterns corresponding to the permanent magnets and for supplying power to the armature are arranged at the same pitch, and a commutator attached to the movable element and brought into contact with the electrode patterns to contact each other. A linear motor comprising a brush for supplying electric power to an armature, wherein the pitch of the permanent magnets and the pitch of the electrode pattern of the commutator are not continuous in a connecting portion between the rail body and the rail body. A structure for connecting a linear motor characterized by being connected. 2. The linear motor connecting portion structure according to claim 1, wherein at the connecting portion between the rail main body and the rail main body, the commutator and the commutator are connected to each other with an electrically non-conducting portion interposed therebetween. . 3. The linear motor according to claim 2, wherein the length of the non-conducting portion is formed so that the brush does not simultaneously contact a pair of commutators connected via the non-conducting portion. Connection structure. 4. The linear motor connecting portion structure according to claim 2, wherein the non-conducting portion is formed as a part of a connecting member that connects the rail body to the rail body. 5. A pair of recesses having a thickness equal to the thickness of the commutator for fitting a pair of the commutators adjacent to the non-conducting portion are provided on a bottom surface of the connecting member. 5. The linear motor connecting portion structure according to claim 4.