JP5288332B2 - Linear motor and linear motor armature - Google Patents

Description

  The present invention relates to a linear motor including an armature having a cooling structure, which is used as a driving motor for a part whose posture changes three-dimensionally, for example, mounted on a machine tool or a semiconductor manufacturing apparatus.

  In the conventional linear motor, when it is going to satisfy the performance of high speed and high output, it is generally handled by increasing the number of turns of the coil. However, in this case, the amount of heat generated by the coil increases, and the increase in the amount of generated heat may adversely affect the periphery of the linear motor. For this reason, there are many cases where a linear motor is provided with a cooling structure (for example, Patent Documents 1 to 4). An example of a linear motor provided with such a cooling structure will be described with reference to FIGS.

  FIG. 8 is a front view of an armature of a conventional cylindrical linear motor. FIG. 9 is a side sectional view of the armature shown in FIG. 8, and FIG. 9A is a side sectional view of the armature cut along line AA shown in FIG. FIG. 9B is a side sectional view of the armature cut along line BB shown in FIG. 8 when viewed from above. In addition, O shown in FIG.8 and FIG.9 is a center axis | shaft of the armature which passes along the center in the front of an armature, and is a center axis | shaft of the pipe line mentioned later. Further, Oa shown in FIGS. 8 and 9 is a central axis of an inflow hole described later, and Ob is a central axis of an outflow hole described later.

8 and 9, the armature includes a hollow coil 1 that forms a magnetic circuit by energization to generate thrust, a hollow coil that is placed on the air core (hollow part) of the hollow coil 1 and closed at one end to generate heat. 1 is a cylindrical pipe 2 that serves as a heat transfer medium, and an inflow hole 3 a that is placed in the pipe 2 so as to close the other end of the pipe 2 and allows a coolant (for example, water) to flow into the pipe 2. And a block 3 in which an outflow hole 3b for allowing the coolant to flow out of the pipe line 2 is formed. One end of the block 3 is fixedly connected to the outflow hole 3b and disposed in the pipe line 2, and the coolant flowing into the pipe line 2 The straight pipe 4 that collects the gas and discharges it to the outflow hole 3b, and the O-ring 5 that is fitted around the block 3 and prevents leakage of the coolant.
9B, the central axis Oa of the inflow hole 3a and the central axis Ob of the outflow hole 3b do not coincide with the central axis O of the pipe line 2, respectively.

  In the armature configured as described above, the coolant flows into the pipe line 2 from the inflow hole 3 a and flows out of the pipe line 2 from the outflow hole 3 b through the pipe 4.

JP 2001-218443 A ACT 6-62787 DE10163626 DE10062823

Here, when the linear motor shown in FIGS. 8 and 9 is installed in a portion where the posture changes three-dimensionally, the posture of the linear motor changes according to the movement of the portion. In some cases, the posture is such that the armature is lying on its side. FIG. 10 is a perspective view of the armature shown in FIG. In FIG. 10, the hollow coil 1 is not shown in order to make the internal structure of the armature easier to see.
When the linear motor shown in FIGS. 8 and 9 is in an attitude in which the armature is laid down, the straight pipe 4 is fixedly connected to the outflow hole 3b, and the liquid level of the coolant 6 is the pipe level. Since the upper limit is not higher than the position where 4 is provided, only the amount of the coolant 6 corresponding to the position of the outflow hole 3b remains in the pipe 2. Referring to FIG. 10, the amount of the coolant 6 in the pipe line 2 becomes an amount corresponding to exactly half of the capacity in the pipe line 2.
As described above, when the linear motor shown in FIGS. 8 and 9 is used in an environment in which the posture is three-dimensionally changed, only the amount of the coolant 6 corresponding to the position of the outflow hole 3b is present in the pipe line 2. There was a problem that the cooling performance was poor.

  The present invention has been made in view of such problems, and even when used in an environment in which the posture changes three-dimensionally, an armature of a linear motor with improved cooling performance than before, and It aims at providing a linear motor provided with the said armature.

In order to solve the above problems, the present invention is configured as follows.
The invention according to claim 1 is a cylindrical hollow coil, a pipe provided in a hollow portion of the hollow coil, provided with one end closed, and the other end of the pipe closed. A block formed with an inflow hole for allowing the coolant to flow in and an outflow hole for allowing the coolant to flow out of the pipe, and provided in the pipe to collect the coolant flowing into the pipe and In the armature of a linear motor comprising a discharge pipe, the outflow hole is formed in the vicinity of the central axis of the pipe line when viewed from the other end side of the pipe line, and one end of the pipe is the winding direction of the hollow coil The other end of the pipe is provided on the outer diameter side from the vicinity of the central axis of the pipe line when viewed from the other end side of the pipe, and is arranged in the vicinity of the other end of the pipe. As described above, a floating bag provided on the outer periphery of the pipe is provided.
According to the second aspect of the present invention, when viewed from the other end side of the pipe line, the pipe is opposed to the other end of the pipe at a position of approximately 180 ° in the circumferential direction with respect to the central axis of the outflow hole. And a weight provided on the outer periphery of the pipe.
According to a third aspect of the present invention, a part of the pipe is on the outer diameter side from the vicinity of the central axis of the pipe when viewed from the other end of the pipe, and the other end of the pipe with respect to the central axis of the outflow hole , So as to face each other at a position of about 180 ° in the circumferential direction, and the weight is provided on the outer periphery of a part of the pipe.
According to a fourth aspect of the present invention, a cylindrical hollow coil, a pipe provided at a hollow portion of the hollow coil, closed at one end, provided to close the other end of the pipe, A block formed with an inflow hole for allowing the coolant to flow in and an outflow hole for allowing the coolant to flow out of the pipe, and provided in the pipe to collect the coolant flowing into the pipe and In the armature of a linear motor comprising a discharge pipe, the outflow hole is formed in the vicinity of the central axis of the pipe line when viewed from the other end side of the pipe line, and one end of the pipe is the winding direction of the hollow coil The other end of the pipe is provided on the outer diameter side from the vicinity of the central axis of the pipe line when viewed from the other end side of the pipe line, and is connected from the other end side of the pipe line. When viewed, the other end of the pipe is opposed to the center axis of the outflow hole at a position of approximately 180 ° in the circumferential direction. It is characterized in further comprising a weight provided on the outer periphery of the pipe as.
According to a fifth aspect of the present invention, a part of the pipe is on the outer diameter side from the vicinity of the central axis of the pipe when viewed from the other end of the pipe, and the other end of the pipe with respect to the central axis of the outflow hole , So as to face each other at a position of about 180 ° in the circumferential direction, and the weight is provided on the outer periphery of a part of the pipe.
The invention according to claim 6 is characterized in that the central axis of the outflow hole coincides with the central axis of the pipe.
The invention described in claim 7 is characterized in that the central axis of the outflow hole does not coincide with the central axis of the pipe.
The invention according to claim 8 is characterized in that the other end of the pipe is provided on one end side of the pipe in the pipe.
The invention according to claim 9 is characterized in that a bearing is provided between the outer periphery of one end of the pipe and the inner periphery of the outflow hole.
The invention according to claim 10 is characterized in that the pipe has a bent shape.
Invention of Claim 11 is equipped with the armature of the linear motor of any one of Claims 1-5, and the field element provided so that the outer periphery of the hollow coil of an armature might be covered. The present invention relates to a linear motor characterized by that.

According to the invention of claim 1 or claim 4, even when used in an environment where the posture changes three-dimensionally, the other end of the pipe is always located above the outflow hole, The cooling performance of the armature can be improved compared to the conventional one.
According to invention of Claim 2,3,5, cooling performance can be improved more reliably than before.
According to the invention described in claims 6 and 8, the cooling performance can be further improved.
According to the seventh aspect of the present invention, the coolant supply device can be easily attached to the inflow hole and the outflow hole.

The front view of the cylindrical linear motor armature which concerns on Example 1 of this invention. Sectional view of a conventional cylindrical linear motor armature Perspective view of cylindrical pipeline The front view of the armature of the cylindrical linear motor which concerns on Example 2 of this invention. Side sectional view of the armature shown in FIG. Front view of the armature when the central axis Ob of the outflow hole 7b in the armature shown in FIGS. 1 and 2 is not aligned with the central axis O. Side sectional view of the linear motor of the present invention Front view of armature of conventional cylindrical linear motor Side sectional view of the armature shown in FIG. The perspective view of the armature shown in FIG.

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

  FIG. 1 is a front view of an armature of a cylindrical linear motor according to Embodiment 1 of the present invention. 2 is a side cross-sectional view of the armature shown in FIG. 1, and FIG. 2 (a) is a side cross-sectional view of the armature cut along line AA shown in FIG. FIG. 2B is a side cross-sectional view of the armature cut along line BB shown in FIG. 1 when viewed from above. In addition, O shown in FIG.1 and FIG.2 is a center axis | shaft of the armature which passes the center in the front of an armature, and is a pipe cross section of the pipe line 2 (the pipe line 2 when it sees from the front of an armature) It is also the central axis of the pipe line 2 passing through the center of the cross section. Further, Oa shown in FIGS. 1 and 2 is a central axis of an inflow hole described later, and Ob is a central axis of an outflow hole described later.

1 and 2, the armature includes a hollow coil 1, a conduit 2, an O-ring 5, a block 7, a bearing 8, a C-ring 9, a support plate 10, a pipe 11, a weight 12, and a float bag 13. The armature is either a stator or a mover.
The hollow coil 1 has a cylindrical shape, forms a magnetic circuit by energization, and generates thrust. The pipe line 2 has a cylindrical shape, is closed at one end, and is placed on the air core part (hollow part) of the hollow coil 1. The pipe line 2 serves as a heat transfer medium for the heated hollow coil 1.
The block 7 is disposed in the pipeline 2 so as to close the other end of the pipeline 2. In the block 7, an inflow hole 7 a through which the cooling liquid flows into the pipe line 2 and an outflow hole 7 b through which the cooling liquid flows out of the pipe line 2 are formed. In the first embodiment, the central axis Ob of the outflow hole 7b coincides with the central axis O, and the central axis Oa of the inflow hole 7a does not coincide with the central axis O. The O-ring 5 is fitted around the block 7 and prevents leakage of the coolant.
The pipe 11 has a bent shape and is disposed in the pipe line 2. The pipe 11 collects the coolant flowing into the pipe 2 and discharges it to the outflow hole 7b, thereby creating a coolant flow. One end of the pipe 11 is connected to the outflow hole 7b, and the other end of the pipe 11 is from the central axis O of the pipe line 2 when viewed from the other end side of the pipe line 2 (the front side of the pipe line 2 shown in FIG. 1). Is also provided on the outer diameter side. In the first embodiment, the other end of the pipe 11 is disposed at the uppermost end portion in the pipe line 2 when viewed from the front side of the pipe line 2 and is one end side of the pipe line 2 when viewed from the side surface side of the pipe line 2 (see FIG. 2 (on the left side of 2). Moreover, in Example 1, when a part of pipe 11 is seen from the front side of the pipe line 2, it is about 180 degrees toward the other end of the pipe 11 and the circumferential direction with respect to the central axis Ob of the outflow hole 7b. Are arranged opposite to each other. That is, a part of the pipe 11 is arranged at the lowermost end portion in the pipe line 2 when viewed from the front side of the pipe line 2.
The bearing 8 is provided between the outer periphery of one end of the pipe 11 and the inner periphery of the outflow hole 7b, and has a function of rotating the pipe 11 around the central axis Ob of the outflow hole 7b. The rotation direction of the pipe 11 is the winding direction of the hollow coil 1. The C ring 9 is disposed on the outer periphery of one end of the pipe 11 so as to stop the one end of the pipe 11 and the bearing 8. The support plate 10 is disposed inside the pipe line 2 of the block 7 so that the pipe 11 cannot be removed from the block 7.

The weight 12 is disposed so as to be opposed to the other end side of the pipe 11 and at a position of approximately 180 ° in the circumferential direction with respect to the central axis Ob of the outflow hole 7b when viewed from the front side of the pipe line 2. Provided on the outer periphery of the pipe 11. That is, the weight 12 is provided on the outer periphery of the pipe 11 existing below the center axis Ob of the outflow hole 7b when viewed from the front side of the pipe line 2 (on the side opposite to the other end side of the pipe 11). In the first embodiment, the pipe 11 is provided on the outer periphery of a part of the pipe 11 disposed at the lowermost end portion.
The float bag 13 is provided on the outer periphery of the pipe 11 in the vicinity of the other end of the pipe 11. That is, the float 13 is provided on the outer periphery of the pipe 11 existing above the central axis Ob of the outflow hole 7b (the other end side of the pipe 11) when viewed from the front side of the pipe line 2. In the first embodiment, the pipe 11 is provided on the outer periphery of the pipe 11 disposed at the uppermost end.
In the armature configured as described above, the coolant flows into the pipe line 2 from the inflow hole 7 a and flows out of the pipe line 2 from the outflow hole 7 b through the pipe 11.

  Here, the pipe 11 is rotatable about the central axis Ob of the outflow hole 7b as a rotation axis. Further, the pipe 11 is provided with a weight 12 arranged at the lower end portion in the pipe line 2 and a float bag 13 arranged at the upper end part in the pipe line 2. As a result, as shown in FIG. 3, the other end of the pipe 11 always exists at the upper end portion in the pipe line 2 even when the attitude of the linear motor changes and the armature lies sideways. FIG. 3 is a perspective view of the armature shown in FIG. As shown in FIG. 3, the other end of the pipe 11 is always present above the outflow hole 7b, so that only the amount of the coolant 6 corresponding to the position of the outflow hole 3b remains in the pipe line 2. However, a large amount of the coolant 6 can be left in the pipe 2. As a result, the cooling performance of the armature can be improved as compared with the conventional case.

As described above, according to the first embodiment, it is possible to provide an armature for a linear motor having a cooling performance better than that of the conventional one even when used in an environment where the posture changes three-dimensionally.
In the first embodiment, the center axis Ob of the outflow hole 7b coincides with the center axis O. For this reason, since the other end of the pipe 11 can be disposed at the uppermost end portion of the space in the duct, the cooling performance of the armature can be best.
Moreover, in Example 1, the weight 12 and the float 13 are provided in the outer periphery of the pipe 11. As shown in FIG. For this reason, even if the attitude | position of a linear motor changes, the other end of the pipe 11 can be moved to the uppermost end part of the space in a pipe line more rapidly with respect to the change. Further, the pendulum movement of the weight 12 can be reduced by the floating bag 13.
In the first embodiment, a part of the pipe 11 is arranged at the lowermost end portion in the pipe line 2 when viewed from the front of the pipe line 2, and the weight 12 is arranged on a part of the outer periphery thereof. For this reason, the function of the weight 12 that always moves the other end of the pipe 11 to the uppermost end in the pipe line 2 can be maximized.

  In addition, in Example 1, although the weight 12 and the float bag 13 were provided in the outer periphery of the pipe 11, you may provide only any one. Even in this case, since the other end of the pipe 11 is always present above the position of the outflow hole 3b, the cooling performance of the armature can be improved as compared with the conventional case.

  FIG. 4 is a front view of the armature of the cylindrical linear motor according to the second embodiment of the present invention. FIG. 5 is a side sectional view of the armature shown in FIG. 4, and FIG. 5 (a) is a side sectional view of the armature cut along line AA shown in FIG. FIG. 5B is a side sectional view of the armature cut along line BB shown in FIG. 4 when viewed from above. In addition, O shown in FIG.4 and FIG.5 is a center axis | shaft of the armature which passes the center in the front of an armature, and is a pipe cross section of the pipe line 2 (the pipe line 2 when it sees from the front of an armature) It is also the central axis of the pipe line 2 passing through the center of the cross section. Further, Oa shown in FIGS. 4 and 5 is the central axis of the inflow hole 7a, and Ob is the central axis of the outflow hole 7b.

  The armature of the cylindrical linear motor according to the second embodiment is different from the armature shown in FIGS. 1 and 2 only in that the pipe 11 is replaced with the pipe 15. Hereinafter, different points will be mainly described.

The pipe 15 is different from the pipe 11 in that a part of the pipe 15 is not disposed at the lowermost end portion in the pipe line 2 when viewed from the front side of the pipe line 2. The rest is the same as the pipe 11.
The weight 12 is provided on the outer periphery of the pipe 11 existing below the central axis Ob of the outflow hole 7b (opposite to the other end side of the pipe 11) when viewed from the front side of the pipe line 2. The float bag 13 is provided on the outer periphery of the pipe 11 disposed at the uppermost end in the pipe line 2.
In the armature configured as described above, the coolant flows into the pipe line 2 from the inflow hole 7a and flows out of the pipe line 2 from the outflow hole 7b through the pipe 15.

  Here, like the pipe 11, the pipe 15 is rotatable about the central axis Ob of the outflow hole 7b. Further, the pipe 15 is provided with a weight 12 disposed at the lower end portion in the pipe line 2 and a float bag 13 disposed at the upper end part in the pipe line 2. As a result, like the first embodiment, the cooling performance of the armature can be improved as compared with the prior art.

As described above, according to the second embodiment, similar to the first embodiment, even when used in an environment in which the posture changes three-dimensionally, a linear motor with improved cooling performance of the armature is provided. can do.
In the second embodiment, as in the first embodiment, the center axis Ob of the outflow hole 7b coincides with the center axis O. For this reason, since the other end of the pipe 15 can be disposed at the uppermost end portion in the pipe line 2 as in the first embodiment, the cooling performance of the armature can be best.
In the second embodiment, as in the first embodiment, the weight 12 and the float bag 13 are provided on the outer periphery of the pipe 15. For this reason, as in the first embodiment, even if the attitude of the linear motor changes, the other end of the pipe 15 can be moved to the uppermost end in the pipe line 2 more quickly in response to the change. Further, the pendulum movement of the weight 12 can be reduced by the floating bag 13.

  In the first embodiment, the weight 12 and the float 13 are provided on the outer periphery of the pipe 15, but only one of them may be provided. Even in this case, since the other end of the pipe 15 always exists above the position of the outflow hole 3b, the cooling performance of the armature can be improved as compared with the conventional case.

  In the first and second embodiments, the central axis Ob of the outflow hole 7b coincides with the central axis O, but it does not have to coincide with the conventional linear motor shown in FIGS. An example of the linear motor in this case will be described as a third embodiment with reference to FIG. 6 is a front view of the armature when the central axis Ob of the outflow hole 7b in the armature shown in FIGS. 1 and 2 is not aligned with the central axis O. FIG.

  The armature of the cylindrical linear motor according to the third embodiment differs from the armature shown in FIGS. 1 and 2 only in that the block 7 is replaced with the block 20 and the pipe 11 is replaced with the pipe 21. Hereinafter, different points will be mainly described.

The block 20 is disposed in the pipeline 2 so as to close the other end of the pipeline 2. In the block 20, an inflow hole 20 a through which the cooling liquid flows into the pipe line 2 and an outflow hole 20 b through which the cooling liquid flows out of the pipe line 2 are formed. In the third embodiment, the outflow hole 20b is formed in the vicinity of the central axis O. However, the central axis Ob of the outflow hole 20b does not coincide with the central axis O, and the central axis Oa of the inflow hole 20a is also different from the central axis O. Does not match.
The pipe 21 has a bent shape, and collects the coolant flowing into the pipe line 2 and discharges it to the outflow hole 7b, thereby creating a coolant flow. One end of the pipe 21 is connected to the outflow hole 20b, and the other end of the pipe 21 is the center axis O of the pipe line 2 when viewed from the other end side of the pipe line 2 (the front side of the pipe line 2 shown in FIG. 6). It is provided on the outer diameter side from the vicinity. In the third embodiment, the other end of the pipe 21 is disposed in the upper part in the pipe line 2 with respect to the central axis Ob of the outflow hole 20b when viewed from the front side of the pipe line 2, and the pipe is viewed from the side surface side of the pipe line 2. The pipe 2 is disposed in the pipe line 2 on one end side. Further, in Example 3, when a part of the pipe 21 is viewed from the front side of the pipe line 2, it is approximately 180 ° in the circumferential direction with the other end of the pipe 21 with respect to the central axis Ob of the outflow hole 20 b. Are arranged opposite to each other. That is, a part of the pipe 21 is disposed below the central axis Ob of the outflow hole 20b when viewed from the front side of the pipe line 2. Note that the positions of the other end of the pipe 21 and a part of the pipe 21 are determined so that the pipe 21 can rotate about the central axis Ob of the outflow hole 20b as a rotation axis.

The weight 12 is disposed so as to be opposed to the other end side of the pipe 21 at a position of about 180 ° in the circumferential direction with respect to the central axis Ob of the outflow hole 20b when viewed from the front side of the pipe line 2. Provided on the outer periphery of the pipe 21. That is, the weight 12 is provided on the outer periphery of the pipe 21 existing below the center axis Ob of the outflow hole 20b (opposite to the other end side of the pipe 21) when viewed from the front side of the pipe line 2. In the third embodiment, the pipe 21 is provided on the outer periphery of a part of the pipe 21 disposed in the lower part.
The float 13 is provided on the outer periphery of the pipe 21 near the other end of the pipe 21. That is, the float bag 23 is provided on the outer periphery of the pipe 21 that exists above the center axis Ob of the outflow hole 20b (the other end side of the pipe 21) when viewed from the front side of the pipe line 2. In the third embodiment, the pipe 21 is provided on the outer periphery of the pipe 21 disposed in the upper part.

Even when the linear motor according to the third embodiment configured as described above is used in an environment in which the posture is three-dimensionally changed as in the first embodiment, the cooling performance of the armature is conventionally improved. It is possible to provide a linear motor with improved quality.
Further, since the central axis Ob of the outflow hole 7b does not coincide with the central axis O, a cooling liquid supply device (not shown) that supplies the cooling liquid to the armature or receives the cooling liquid from the armature is provided in the inflow hole and the outflow hole. Easy to install.

  In the third embodiment, the case where the central axis Ob of the outflow hole 7b in the armature shown in FIGS. 1 and 2 is not made to coincide with the central axis O has been described. However, the electric machine shown in FIGS. The center axis Ob of the outflow hole 7b in the child may not be aligned with the center axis O.

  In this embodiment, a linear motor including the linear motor armature described in the first to third embodiments will be described. FIG. 7 is a side sectional view of the linear motor of the present invention.

  As shown in FIG. 7, the linear motor includes the armature 30 of the linear motor described in the first to third embodiments, and a field element 40 that is provided so as to cover the outer periphery of the hollow coil 1 and includes a permanent magnet. Prepare.

  As described above, according to the fourth embodiment, it is possible to provide a linear motor in which the armature cooling performance is improved compared to the conventional one even when used in an environment in which the posture changes three-dimensionally.

DESCRIPTION OF SYMBOLS 1 Hollow coil 2 Pipe line 3, 7, 20 Block 3a, 7a, 20a Inflow hole 3b, 7b, 20b Outflow hole 4, 11, 15, 21 Pipe 5 O ring 8 Bearing 9 C ring 10 Support plate 12 Weight 13 Floating bag

Claims (11)

A cylindrical hollow coil;
A pipe line provided at a hollow portion of the hollow coil and closed at one end;
A block that is provided so as to close the other end of the pipe, and in which an inflow hole through which the coolant flows into the pipe and an outflow hole through which the coolant flows out of the pipe;
In the armature of the linear motor, comprising: a pipe provided in the pipe line, and a pipe that collects the coolant flowing into the pipe line and discharges it to the outflow hole.
The outflow hole is formed in the vicinity of the central axis of the pipe line when viewed from the other end side of the pipe line,
One end of the pipe is connected to the outflow hole so that the pipe is rotatable in the winding direction of the hollow coil,
The other end of the pipe is provided on the outer diameter side from the vicinity of the central axis of the pipe line when viewed from the other end side of the pipe line,
An armature for a linear motor, comprising a float bag provided on an outer periphery of the pipe so as to be disposed in the vicinity of the other end of the pipe.   When viewed from the other end side of the pipe line, it is disposed on the outer periphery of the pipe so as to be opposed to the other end of the pipe in a circumferential direction at a position of approximately 180 ° with respect to the central axis of the outflow hole. The armature for a linear motor according to claim 1, further comprising a weight provided. A part of the pipe is on the outer diameter side from the vicinity of the central axis of the pipe line when viewed from the other end side of the pipe line, and the other end of the pipe and the circumferential direction with respect to the central axis of the outflow hole To face at a position of approximately 180 ° toward
The armature for a linear motor according to claim 2, wherein the weight is provided on an outer periphery of a part of the pipe. A cylindrical hollow coil;
A pipe line provided at a hollow portion of the hollow coil and closed at one end;
A block that is provided so as to close the other end of the pipe, and in which an inflow hole through which the coolant flows into the pipe and an outflow hole through which the coolant flows out of the pipe;
In the armature of the linear motor, comprising: a pipe provided in the pipe line, and a pipe that collects the coolant flowing into the pipe line and discharges it to the outflow hole.
The outflow hole is formed in the vicinity of the central axis of the pipe line when viewed from the other end side of the pipe line,
One end of the pipe is connected to the outflow hole so that the pipe is rotatable in the winding direction of the hollow coil,
The other end of the pipe is provided on the outer diameter side from the vicinity of the central axis of the pipe line when viewed from the other end side of the pipe line,
When viewed from the other end side of the pipe line, it is disposed on the outer periphery of the pipe so as to be opposed to the other end of the pipe in a circumferential direction at a position of approximately 180 ° with respect to the central axis of the outflow hole. An armature for a linear motor, comprising a weight provided. A part of the pipe is on the outer diameter side from the vicinity of the central axis of the pipe line when viewed from the other end side of the pipe line, and the other end of the pipe and the circumferential direction with respect to the central axis of the outflow hole To face at a position of approximately 180 ° toward
The armature for a linear motor according to claim 4, wherein the weight is provided on an outer periphery of a part of the pipe.   The linear motor armature according to claim 1, wherein a central axis of the outflow hole coincides with a central axis of the pipe line.   The armature of the linear motor according to any one of claims 1 to 5, wherein a center axis of the outflow hole does not coincide with a center axis of the pipe line.   The armature of the linear motor according to claim 1, wherein the other end of the pipe is provided on one end side of the pipe in the pipe.   The linear motor armature according to claim 1, further comprising a bearing provided between an outer periphery of one end of the pipe and an inner periphery of the outflow hole.   The linear pipe armature according to claim 1, wherein the pipe has a bent shape. The armature of the linear motor according to any one of claims 1 to 5,
And a field element provided to cover the outer periphery of the hollow coil of the armature.

Images