JP2021040387A - Rotor of rotary electric machine - Google Patents

Abstract

To provide a rotor of a rotary electric machine in which deformation of a tubular member can be suppressed.SOLUTION: A groove 40 is formed in the outer circumferential surface of a first shaft member 18. Further, first fiber 31a is partially inserted in the groove 40. Accordingly, when, for example, the first shaft member 18 is inclined toward a tubular member 16 in such a way that the axis of the first shaft member 18 intersects the axis of the tubular member 16, the first fiber 31a in the groove 40 is brought into contact with a first tapered surface 41 and a second tapered surface 42 of the groove 40 so that the inclination of the first shaft member 18 to the tubular member 16 can be suppressed. As a result, it is less likely that the first shaft member 18 slides with respect to the inner circumferential surface of the tubular member 16 in such a way that the axis of the first shaft member 18 intersects the axis of the tubular member 16.SELECTED DRAWING: Figure 5

Description

The present invention relates to a rotor of a rotary electric machine.

For example, as disclosed in Patent Document 1, the tubular member, the magnetic material arranged in the tubular member, and at least one of both ends in the axial direction of the tubular member are provided and fixed to the inner peripheral surface of the tubular member. A rotor of a rotary electric machine provided with a shaft member is known. The tubular member is formed, for example, in the axial direction of the tubular member and the first layer portion formed by combining a plurality of first fibers oriented in the circumferential direction of the tubular member in the first resin. It is configured by at least laminating a second layer portion formed by compounding a plurality of second fibers oriented in an elongated state in a second resin.

Japanese Unexamined Patent Publication No. 2004-11249

By the way, when the tubular member, the shaft member and the magnetic body are rotating together, the shaft member slides with respect to the inner peripheral surface of the tubular member, for example, the axis of the shaft member with respect to the axis of the tubular member. The shaft member may try to tilt with respect to the tubular member so that If the shaft member is tilted with respect to the tubular member, the tubular member may be deformed.

An object of the present invention is to provide a rotor of a rotary electric machine capable of suppressing deformation of a tubular member.

Rotating electric rotors that solve the above problems are provided on at least one of a tubular member, a magnetic material arranged in the tubular member, and both ends in the axial direction of the tubular member, and an inner peripheral surface of the tubular member. The tubular member is formed by combining a plurality of first fibers oriented in a circumferential direction of the tubular member in a first resin. By at least laminating a first layer portion and a second layer portion formed by combining a plurality of second fibers oriented in a state extending in the axial direction of the tubular member in a second resin. In the rotor of the rotating electric machine, the innermost layer of the tubular member is the first layer portion, and a groove extending around the axis of the shaft member is formed on the outer peripheral surface of the shaft member. At least a part of the first fiber has entered the groove.

According to this, even if the shaft member tries to tilt with respect to the cylinder member so that the axis of the shaft member intersects the shaft line of the cylinder member, the first fiber entering the groove and the shaft on the inner surface of the groove The contact with the surface extending in the direction intersecting the axis of the member suppresses the inclination of the shaft member with respect to the tubular member. As a result, the shaft member becomes less likely to slip with respect to the inner peripheral surface of the cylinder member so that the axis of the shaft member intersects the axis of the cylinder member, and deformation of the cylinder member can be suppressed.

In the rotor of the rotary electric machine, the groove is formed so as to extend over the entire circumference of the shaft member in the circumferential direction with respect to the outer peripheral surface of the shaft member, and the first fiber is contained in the groove. It is preferable that is inserted over the entire circumference in the circumferential direction.

For example, the groove is formed so as to extend over the entire circumferential direction of the shaft member with respect to the outer peripheral surface of the shaft member, and the first fiber partially enters the groove in the circumferential direction of the shaft member. Consider the case. Compared to such a case, when the shaft member tries to tilt with respect to the cylinder member so that the axis of the shaft member intersects the shaft line of the cylinder member, the first fiber that has entered the groove Contact with a surface extending in a direction intersecting the axis of the shaft member on the inner surface of the groove is facilitated. Therefore, the inclination of the shaft member with respect to the tubular member is easily suppressed, and the shaft member becomes more difficult to slip with respect to the inner peripheral surface of the tubular member so that the axial line of the shaft member intersects the axis of the tubular member. As a result, it is possible to further suppress the deformation of the tubular member.

In the rotor of the rotary electric machine, it is preferable that bead particles are added to the first resin.
For example, it is conceivable that the bead particles are added to the first resin so as to sandwich the first fiber that has entered the groove in cooperation with the inner surface of the groove. In such a case, for example, even if the first fiber that has entered the groove tries to come out of the groove, it is possible to prevent the first fiber from coming out of the groove due to the contact of the first fiber with the bead particles. Can be done. Therefore, the bead particles can facilitate the maintenance of the state in which the first fiber has entered the groove.

In the rotor of the rotary electric machine, the width of the shaft member in the axial direction at the opening edge of the groove is preferably larger than the diameter of the first fiber.
According to this, for example, as compared with the case where the width of the shaft member in the axial direction at the opening edge of the groove is equal to or less than the diameter of the first fiber, the first fiber is more likely to enter the groove. The area that has entered the groove can be further increased. Therefore, when the shaft member tries to tilt with respect to the cylinder member so that the axis of the shaft member intersects the shaft line of the cylinder member, the first fiber entering the groove and the shaft member on the inner surface of the groove It becomes easy to make contact with a surface extending in a direction intersecting the axis of. Therefore, the inclination of the shaft member with respect to the cylinder member is easily suppressed, and the shaft member becomes more difficult to slip with respect to the cylinder member so that the axis of the shaft member intersects the shaft line of the cylinder member. As a result, it is possible to further suppress the deformation of the tubular member.

According to the present invention, deformation of the tubular member can be suppressed.

FIG. 5 is a cross-sectional view for explaining the rotary electric machine in the embodiment. Sectional drawing which shows by breaking a part of a rotor. FIG. 5 is an enlarged cross-sectional view showing a part of each of the tubular member and the first shaft member. FIG. 3 is a sectional view taken along line 4-4 in FIG. FIG. 5 is an enlarged cross-sectional view showing a state in which the first fiber has entered the groove. FIG. 5 is an enlarged sectional view showing a part of each of a tubular member and a first shaft member in another embodiment.

Hereinafter, an embodiment in which the rotor of the rotary electric machine is embodied will be described with reference to FIGS. 1 to 5.
As shown in FIG. 1, the rotary electric machine 10 is housed in a tubular housing 11. The housing 11 includes a bottomed tubular first housing structure 12 and a plate-shaped second housing structure 13 connected to the first housing structure 12. The first housing structure 12 and the second housing structure 13 are made of metal, for example, aluminum.

The first housing component 12 has a plate-shaped bottom wall 12a and a peripheral wall 12b extending in a tubular shape from the outer peripheral portion of the bottom wall 12a. The second housing structure 13 is connected to the first housing structure 12 in a state where the opening on the peripheral wall 12b opposite to the bottom wall 12a is closed.

A cylindrical boss portion 12c is provided on the inner surface of the bottom wall 12a of the first housing structure 12 in a protruding state. The axis of the boss portion 12c coincides with the axis of the peripheral wall 12b of the first housing structure 12. Further, a cylindrical boss portion 13c is provided on the inner surface of the second housing configuration 13 in a protruding state. The axis of the boss portion 13c coincides with the axis of the peripheral wall 12b of the first housing structure 12. Therefore, the axes of both boss portions 12c and 13c are aligned.

The rotary electric machine 10 includes a stator 14 and a rotor 15. The stator 14 has a cylindrical stator core 14a fixed to the inner peripheral surface of the peripheral wall 12b of the first housing structure 12, and a coil 14b wound around the stator core 14a. The rotor 15 is arranged in the housing 11 so as to be rotatable inside the stator 14 in the radial direction.

As shown in FIG. 2, the rotor 15 includes a tubular member 16, a permanent magnet 17 which is a magnetic material, and a first shaft member 18 and a second shaft member 19 as shaft members. The tubular member 16 is made of carbon fiber reinforced plastic. The tubular member 16 has a tubular shape in which the axis of the tubular member 16 extends linearly.

The permanent magnet 17 has a solid columnar shape. The permanent magnet 17 is arranged in the tubular member 16. The axis of the permanent magnet 17 coincides with the axis of the tubular member 16. The permanent magnet 17 is magnetized in the radial direction of the permanent magnet 17. The length of the permanent magnet 17 in the direction in which the axis extends is shorter than the length of the tubular member 16 in the direction in which the axis extends. Both end faces 17b and 17c located on both sides of the permanent magnet 17 in the axial direction are flat surfaces extending in a direction orthogonal to the axial direction of the permanent magnet 17.

The end face 17b of the permanent magnet 17 is located inside the tubular member 16. Therefore, the end portion 16a located on one side of the tubular member 16 in the axial direction protrudes in the axial direction from the end surface 17b of the permanent magnet 17. Further, the end surface 17c of the permanent magnet 17 is located inside the tubular member 16. Therefore, the end portion 16b located on the other side of the tubular member 16 in the axial direction protrudes in the axial direction from the end surface 17c of the permanent magnet 17.

The first shaft member 18 and the second shaft member 19 are provided at both ends of the tubular member 16 in the axial direction, respectively. The first shaft member 18 and the second shaft member 19 are made of iron. The first shaft member 18 has a first fixing portion 18a, a first flange portion 18b, and a first shaft portion 18c. The first fixing portion 18a has a columnar shape. The first flange portion 18b is an annular shape that is continuous with the first fixing portion 18a and has an outer diameter larger than that of the first fixing portion 18a. The first shaft portion 18c is a columnar shape continuous with the end portion of the first flange portion 18b opposite to the first fixing portion 18a. The outer diameter of the first shaft portion 18c is equal to the outer diameter of the first fixing portion 18a. The first shaft member 18 is fixed to the inner peripheral surface of the cylinder member 16 in a state where the first fixing portion 18a is inserted into one end of the cylinder member 16 in the axial direction.

The second shaft member 19 has a second fixing portion 19a, a second flange portion 19b, and a second shaft portion 19c. The second fixing portion 19a has a columnar shape. The second flange portion 19b is an annular shape that is continuous with the second fixing portion 19a and has a larger outer diameter than the second fixing portion 19a. The second shaft portion 19c is a columnar shape continuous with the end portion of the second flange portion 19b opposite to the second fixing portion 19a. The outer diameter of the second shaft portion 19c is equal to the outer diameter of the second fixing portion 19a. The second shaft member 19 is fixed to the inner peripheral surface of the cylinder member 16 in a state where the second fixing portion 19a is inserted into the other end of the cylinder member 16 in the axial direction.

The outer diameter of the first fixing portion 18a and the outer diameter of the second fixing portion 19a are equal to each other. Further, the outer diameters of the first flange portion 18b and the second flange portion 19b are equal to each other. Further, the outer diameters of the first shaft portion 18c and the second shaft portion 19c are equal to each other. The first shaft member 18 and the second shaft member 19 are provided at both ends of the cylinder member 16 in the axial direction in a state where the axis of the first shaft member 18 and the axis of the second shaft member 19 coincide with the axis of the cylinder member 16. Each is provided. Therefore, the axis of the first shaft member 18 and the axis of the second shaft member 19 coincide with the axis of the permanent magnet 17.

The end surface 18d of the first fixing portion 18a opposite to the first flange portion 18b is a flat surface extending in a direction orthogonal to the direction in which the axis of the first shaft member 18 extends. The end face 18d of the first fixing portion 18a is in surface contact with the end face 17b of the permanent magnet 17.

The end surface 19d of the second fixing portion 19a on the side opposite to the second flange portion 19b is a flat surface extending in a direction orthogonal to the direction in which the axis of the second shaft member 19 extends. The end surface 19d of the second fixing portion 19a is in surface contact with the end surface 17c of the permanent magnet 17.

The end surface 18e of the first flange portion 18b on the side of the first fixing portion 18a is in contact with the end portion 16a of the tubular member 16. The end surface 19e of the second flange portion 19b on the side of the second fixing portion 19a is in contact with the end portion 16b of the tubular member 16. Then, by abutting the end surface 18e of the first flange portion 18b with respect to the end portion 16a of the tubular member 16 and contacting the end surface 19e of the second flange portion 19b with the end portion 16b of the tubular member 16, the axial direction of the tubular member 16 Movement is restricted.

As shown in FIG. 1, the first shaft portion 18c of the first shaft member 18 passes through the inside of the boss portion 13c, penetrates the second housing structure 13, and projects out of the housing 11. A first bearing 21 is provided between the inner peripheral surface of the boss portion 13c and the outer peripheral surface of the first shaft portion 18c. The first shaft portion 18c is supported by the boss portion 13c via the first bearing 21 so as to be rotatably supported by the housing 11.

The second shaft portion 19c of the second shaft member 19 is inserted inside the boss portion 12c. A second bearing 22 is provided between the inner peripheral surface of the boss portion 12c and the outer peripheral surface of the second shaft portion 19c. The second shaft member 19 is supported by the housing 11 in a rotatable state by the second shaft portion 19c being supported by the boss portion 12c via the second bearing 22.

As shown in FIGS. 3 and 4, the tubular member 16 is configured by at least stacking the first layer portion 31 and the second layer portion 32. In the present embodiment, the innermost layer of the tubular member 16 is the first layer portion 31. The layer next to the first layer portion 31 forming the innermost layer of the tubular member 16 is the second layer portion 32. In the configuration of the tubular member 16, the innermost layer of the tubular member 16 is the first layer portion 31, and the second layer portion 32 is outside the first layer portion 31 forming the innermost layer of the tubular member 16. If at least one layer is present, the number of layers of the tubular member 16 and the order of the outer layers after the innermost layer of the tubular member 16 may be appropriately changed.

The first layer portion 31 is formed by combining a plurality of first fibers 31a oriented in a state extending in the circumferential direction of the tubular member 16 in a first matrix resin 31b as a first resin. The first matrix resin 31b is a thermosetting resin. The plurality of first fibers 31a continuously extend over the entire circumference of the tubular member 16 in the circumferential direction. The plurality of first fibers 31a are arranged in the radial direction and the axial direction of the tubular member 16. The first fiber 31a is a carbon fiber. The first fiber 31a has a circular shape in cross section. In the first layer portion 31 forming the innermost layer of the tubular member 16, each of the first fibers 31a arranged on the innermost side in the radial direction of the tubular member 16 forms the inner peripheral surface of the first layer portion 31. A part of the matrix resin 31b protrudes from the inner peripheral surface.

The second layer portion 32 is formed by combining a plurality of second fibers 32a oriented in a state extending in the axial direction of the tubular member 16 in a second matrix resin 32b as a second resin. The second matrix resin 32b is a thermosetting resin. The plurality of second fibers 32a extend continuously in the axial direction of the tubular member 16. The plurality of second fibers 32a are arranged in the radial direction and the circumferential direction of the tubular member 16. The second fiber 32a is a carbon fiber. The second fiber 32a has a circular shape in cross section. In the second layer portion 32, all the second fibers 32a are embedded inside the second matrix resin 32b.

A plurality of grooves 40 are formed on the outer peripheral surface of the first fixing portion 18a of the first shaft member 18. Although not shown for convenience of explanation, a groove 40 is also formed on the outer peripheral surface of the second fixed portion 19a of the second shaft member 19 on the outer peripheral surface of the first fixed portion 18a of the first shaft member 18. A plurality of grooves 40 similar to the above are formed. In the following description, the description of the groove 40 formed in the second shaft member 19 is the same as the description of the groove 40 formed in the first shaft member 18, and therefore the detailed description thereof will be omitted. ..

Each groove 40 is formed so as to extend over the entire circumference of the first shaft member 18 in the circumferential direction with respect to the outer peripheral surface of the first fixing portion 18a of the first shaft member 18. Therefore, each groove 40 extends around the axis of the first shaft member 18. Each groove 40 is provided at a predetermined interval in the axial direction of the first shaft member 18.

As shown in FIG. 5, the groove 40 obliquely intersects the axial direction of the first shaft member 18 from the outer peripheral surface of the first fixed portion 18a of the first shaft member 18 toward the axis of the first shaft member 18. It has a first tapered surface 41 extending in the direction. The first tapered surface 41 is an annular shape extending in the circumferential direction of the first shaft member 18. Further, the groove 40 is in a direction obliquely intersecting the axis direction of the first shaft member 18 from the outer peripheral surface of the first fixing portion 18a of the first shaft member 18 toward the axis of the first shaft member 18. Moreover, it has a second tapered surface 42 extending in a direction approaching the first tapered surface 41 as the distance from the outer peripheral surface of the first fixing portion 18a of the first shaft member 18 increases. The second tapered surface 42 is an annular shape extending in the circumferential direction of the first shaft member 18. The intersection of the first tapered surface 41 and the second tapered surface 42 forms the bottom 43 of the groove 40. The bottom portion 43 of the groove 40 extends linearly over the entire circumference of the first shaft member 18 in the circumferential direction. The groove 40 has a triangular cross section cut in the axial direction of the first shaft member 18.

The first peripheral edge 41e continuous with the outer peripheral surface of the first fixed portion 18a of the first shaft member 18 on the first tapered surface 41, and the outer peripheral surface of the first fixed portion 18a of the first shaft member 18 on the second tapered surface 42. The second peripheral edge portion 42e continuous with the groove 40 forms an opening edge 40e of the groove 40. In the axial direction of the first shaft member 18, the width between the first peripheral edge portion 41e and the second peripheral edge portion 42e is the axial width H1 of the first shaft member 18 at the opening edge 40e of the groove 40. The axial width H1 of the first shaft member 18 at the opening edge 40e of the groove 40 is larger than the diameter L1 of the first fiber 31a. The first tapered surface 41 and the second tapered surface 42 are surfaces extending in a direction intersecting the axis of the first shaft member 18 on the inner surface of the groove 40.

Then, in the first layer portion 31 forming the innermost layer of the tubular member 16, a part of each first fiber 31a protruding from the inner peripheral surface of the first matrix resin 31b has entered each groove 40. In the present embodiment, a part of each of the first fibers 31a is inserted into each groove 40 over the entire circumference of the first shaft member 18 in the circumferential direction. Each of the first fibers 31a enters the groove 40 in a state where a part of each of the first tapered surface 41 and the second tapered surface 42 of each groove 40 is in contact with each other. Further, in the present embodiment, a part of the first matrix resin 31b also penetrates into each groove 40.

The tubular member 16 is a laminated body in which the flat plate-shaped first layer portion 31 and the second layer portion 32 are laminated in the plate thickness direction, and the first layer portion 31 is permanently formed as the innermost layer of the tubular member 16. It is formed by winding the magnet 17, the first fixing portion 18a of the first shaft member 18, and the second fixing portion 19a of the second shaft member 19. The laminate is heated in a state of being wound around the permanent magnet 17, the first fixing portion 18a of the first shaft member 18, and the second fixing portion 19a of the second shaft member 19. At this time, a part of the first matrix resin 31b flows into each groove 40, and each first fiber 31a enters each groove 40. Then, the first matrix resin 31b and the second matrix resin 32b are thermoset. As a result, the tubular member 16 is formed, and the permanent magnet 17, the first shaft member 18, and the second shaft member 19 are relative to the first matrix resin 31b of the first layer portion 31 forming the innermost layer of the tubular member 16. It is fixed to the tubular member 16 in a welded state.

Next, the operation of this embodiment will be described.
In the rotor 15 having the above configuration, when electric power controlled by a drive circuit (not shown) is supplied to the coil 14b, the permanent magnet 17 tries to rotate, and the tubular member 16 integrally with the permanent magnet 17 via the permanent magnet 17. Rotate. Then, torque is transmitted from the cylinder member 16 to the first shaft member 18 at the fixed portion between the cylinder member 16 and the first shaft member 18, and torque is transmitted to the cylinder at the fixed portion between the cylinder member 16 and the second shaft member 19. It is transmitted from the member 16 to the second shaft member 19, and the first shaft member 18 and the second shaft member 19 rotate integrally. In this way, the tubular member 16, the first shaft member 18, the second shaft member 19, and the permanent magnet 17 rotate integrally.

By the way, when the tubular member 16, the first shaft member 18, the second shaft member 19, and the permanent magnet 17 are rotating together, the first shaft member 18 is relative to the inner peripheral surface of the tubular member 16. When slipping, for example, the first shaft member 18 may try to tilt with respect to the inner peripheral surface of the cylinder member 16 so that the axis of the first shaft member 18 intersects the axis of the cylinder member 16. At this time, a part of each first fiber 31a has entered each groove 40. Therefore, even if the first shaft member 18 tries to tilt with respect to the cylinder member 16 so that the axis of the first shaft member 18 intersects with the shaft line of the cylinder member 16, each of the first shaft members entering the grooves 40. The contact between the fiber 31a and the first tapered surface 41 and the second tapered surface 42 of the groove 40 suppresses the inclination of the first shaft member 18 with respect to the tubular member 16. Although the action related to the first shaft member 18 has been described here, the detailed description thereof will be omitted because the action related to the second shaft member 19 is the same as the action related to the first shaft member 18.

In the above embodiment, the following effects can be obtained. In the following description of the effect, the effect on the first shaft member 18 will be described, but since the effect on the second shaft member 19 is the same as the effect on the first shaft member 18, detailed description thereof will be omitted.

(1) A groove 40 is formed on the outer peripheral surface of the first shaft member 18. Then, a part of the first fiber 31a has entered the groove 40. According to this, for example, even if the first shaft member 18 tries to tilt with respect to the cylinder member 16 so that the axis of the first shaft member 18 intersects the axis of the cylinder member 16, the first shaft member 18 enters the groove 40. The contact between the first fiber 31a and the first tapered surface 41 and the second tapered surface 42 of the groove 40 suppresses the inclination of the first shaft member 18 with respect to the tubular member 16. As a result, the first shaft member 18 becomes less slippery with respect to the inner peripheral surface of the cylinder member 16 so that the axis of the first shaft member 18 intersects the axis of the cylinder member 16, and the cylinder member 16 is deformed. Can be suppressed.

(2) The groove 40 is formed so as to extend over the entire circumference of the first shaft member 18 in the circumferential direction with respect to the outer peripheral surface of the first shaft member 18. The first fiber 31a enters the groove 40 over the entire circumference of the first shaft member 18 in the circumferential direction. For example, the groove 40 is formed so as to extend over the entire circumference of the first shaft member 18 in the circumferential direction with respect to the outer peripheral surface of the first shaft member 18, and the first fiber 31a is formed of the first shaft member 18. Consider the case where only a part of the groove 40 is inserted in the circumferential direction of. Compared to such a case, when the first shaft member 18 tries to tilt with respect to the cylinder member 16 so that the axis of the first shaft member 18 intersects the axis of the cylinder member 16, the groove 40 The first fiber 31a that has entered the inside and the first tapered surface 41 and the second tapered surface 42 of the groove 40 are easily brought into contact with each other. Therefore, the inclination of the first shaft member 18 with respect to the tubular member 16 is easily suppressed, and the first shaft member 18 of the tubular member 16 is such that the axis of the first shaft member 18 intersects the axis of the tubular member 16. It becomes even more difficult to slip on the inner peripheral surface. As a result, it is possible to further suppress the deformation of the tubular member 16.

(3) The axial width H1 of the first shaft member 18 at the opening edge 40e of the groove 40 is larger than the diameter L1 of the first fiber 31a. According to this, for example, as compared with the case where the width H1 in the axial direction of the first shaft member 18 at the opening edge 40e of the groove 40 is equal to or less than the diameter L1 of the first fiber 31a, the first fiber 31a is inside the groove 40. Since it becomes easy to enter, the region of the first fiber 31a that has entered the groove 40 can be further increased. Therefore, when the first shaft member 18 tries to tilt with respect to the cylinder member 16 so that the axis of the first shaft member 18 intersects the axis of the cylinder member 16, the first shaft member 18 enters the groove 40. The contact between the fiber 31a and the first tapered surface 41 and the second tapered surface 42 of the groove 40 is facilitated. Therefore, the inclination of the first shaft member 18 with respect to the cylinder member 16 is easily suppressed, and the first shaft member 18 is attached to the cylinder member 16 so that the axis of the first shaft member 18 intersects the axis of the cylinder member 16. On the other hand, it becomes even more difficult to slip. As a result, it is possible to further suppress the deformation of the tubular member 16.

The above embodiment can be modified and implemented as follows. The above embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.

〇 As shown in FIG. 6, the bead particles 50 may be added to the first matrix resin 31b of the first layer portion 31. A plurality of bead particles 50 are added to the first matrix resin 31b of the first layer portion 31. A part of the plurality of bead particles 50 has entered the groove 40. The bead particles 50 are made of ceramics. Further, a part of the plurality of bead particles 50 is arranged at a position where the first fiber 31a that has entered the groove 40 is sandwiched in cooperation with the first tapered surface 41 and the second tapered surface 42 of the groove 40. ..

In this way, for example, the first matrix resin 31b is such that the bead particles 50 sandwich the first fiber 31a that has entered the groove 40 in cooperation with the first tapered surface 41 and the second tapered surface 42 of the groove 40. It is possible that it is added to. In such a case, for example, even if the first fiber 31a that has entered the groove 40 tries to come out of the groove 40, the first fiber 31a comes into contact with the bead particles 50, so that the first fiber 31a comes out of the groove 40. It can be suppressed that the particles are lost. Therefore, the bead particles 50 can easily maintain the state in which the first fiber 31a has entered the groove 40.

Further, for example, it is conceivable that the bead particles 50 are added to the first matrix resin 31b so as to enter the groove 40. In such a case, for example, even if the first shaft member 18 tries to tilt with respect to the cylinder member 16 so that the axis of the first shaft member 18 intersects the axis of the cylinder member 16, the first shaft member 18 enters the groove 40. The bead particles 50 also come into contact with the first tapered surface 41 and the second tapered surface 42 of the groove 40 together with the first fiber 31a. Therefore, the inclination of the first shaft member 18 with respect to the tubular member 16 is more likely to be suppressed. As a result, the first shaft member 18 becomes more difficult to slip with respect to the inner peripheral surface of the cylinder member 16 so that the axis of the first shaft member 18 intersects the axis of the cylinder member 16. Deformation can be further suppressed. The bead particles 50 are made of ceramics as long as they are made of a material that does not melt when the first matrix resin 31b is thermoset and has a strength that does not lose its shape when the rotor 15 rotates at high speed. Not exclusively.

〇 In the embodiment, for example, the groove formed on the outer peripheral surface of the first fixing portion 18a of the first shaft member 18 is a spiral groove having a shape that draws a spiral around the axis of the first shaft member 18. May be good. In short, a groove extending around the axis of the first shaft member 18 may be formed on the outer peripheral surface of the first shaft member 18. A part of the tubular member 16 in each of the first fibers 31a in the circumferential direction enters the spiral groove.

○ In the embodiment, the groove 40 has a triangular cross section cut in the axial direction of the first shaft member 18, but for example, the cross section cut in the axial direction of the first shaft member 18 may have a quadrangular shape. It may be trapezoidal or even semicircular. In short, it may be a groove having a surface extending in a direction intersecting the axis of the first shaft member 18 on the inner surface of the groove 40.

○ In the embodiment, the entire first fiber 31a may enter the groove 40. In short, it is sufficient that at least a part of the first fiber 31a has entered the groove 40.
In the embodiment, the axial width H1 of the first shaft member 18 at the opening edge 40e of the groove 40 may be the same as the diameter L1 of the first fiber 31a.

In the embodiment, the axial width H1 of the first shaft member 18 at the opening edge 40e of the groove 40 may be smaller than the diameter L1 of the first fiber 31a.
○ In the embodiment, a part of the first matrix resin 31b does not have to enter each groove 40.

〇 In the embodiment, the magnetic material is not limited to a permanent magnet, and may be, for example, a laminated core, an amorphous core, a dust core, or the like.
○ In the embodiment, the rotor 15 may have, for example, a configuration in which the second shaft member 19 is not provided. In short, the rotor 15 may have a configuration in which shaft members are provided at at least one of both ends of the tubular member 16 in the axial direction.

〇 In the embodiment, the permanent magnet 17 may be, for example, a solid square shape, and the shape of the permanent magnet 17 is not particularly limited. Further, the first fixing portion 18a of the first shaft member 18 and the second fixing portion 19a of the second shaft member 19 may be, for example, a square columnar shape, and the shape of the first fixing portion 18a of the first shaft member 18 may be formed. , And the shape of the second fixing portion 19a of the second shaft member 19 is not particularly limited. Then, for example, when the permanent magnet 17 is a solid quadrangular prism and the first fixed portion 18a of the first shaft member 18 and the second fixed portion 19a of the second shaft member 19 are quadrangular prisms, the tubular member 16 is It needs to be formed in a square cylinder shape. Therefore, the shape of the tubular member 16 may be appropriately changed depending on the shapes of the permanent magnet 17, the first fixing portion 18a of the first shaft member 18, and the second fixing portion 19a of the second shaft member 19.

〇 In the embodiment, organic fibers or inorganic fibers may be used as the first fiber 31a and the second fiber 32a, different types of organic fibers, different types of inorganic fibers, or a mixture of organic fibers and inorganic fibers. A fine mixed fiber may be used. Examples of the type of organic fiber include aramid fiber, poly-p-phenylene benzobisoxanol fiber, ultra-high molecular weight polyethylene fiber and the like.

○ In the embodiment, for example, in the first layer portion 31 that forms the laminated body and the innermost layer of the tubular member 16, a plurality of first surfaces of the first matrix resin 31b located in the plate thickness direction are used. A part of the fiber 31a may be projected in advance. Then, the laminated body is made of the permanent magnet 17, the first shaft member 18, and the second shaft member so that a part of each first fiber 31a protruding from the surface of the first matrix resin 31b enters each groove 40. It may be wound around 19th. Specifically, on one surface of the first matrix resin 31b located in the plate thickness direction, a portion facing the first fixing portion 18a of the first shaft member 18 and the second fixing portion 19a of the second shaft member 19, respectively. Only in the above, a part of the plurality of first fibers 31a is projected. Then, the surface of the first matrix resin 31b on which a part of the plurality of first fibers 31a protrudes is the permanent magnet 17, the first fixing portion 18a of the first shaft member 18, and the second fixing portion of the second shaft member 19. The laminate is wound around the permanent magnet 17, the first fixing portion 18a of the first shaft member 18, and the second fixing portion 19a of the second shaft member 19 in a state of being arranged to face each of the outer peripheral surfaces of 19a. I will go. At this time, the laminated body is made of the permanent magnet 17, the first shaft member 18, and the second shaft so that a part of each first fiber 31a protruding from the surface of the first matrix resin 31b enters each groove 40. It is wound around the member 19. As a result, a part of each first fiber 31a is in a state of being inserted into each groove 40.

10 ... Rotating electric machine, 15 ... Rotor, 16 ... Cylinder member, 17 ... Magnetic permanent magnet, 18 ... First shaft member as shaft member, 19 ... Second shaft member as shaft member, 31 ... First layer Parts, 31a ... 1st fiber, 31b ... 1st matrix resin as the 1st resin, 32 ... 2nd layer part, 32a ... 2nd fiber, 32b ... 2nd matrix resin as the 2nd resin, 40 ... Grooves, 40e ... opening edge, 50 ... bead particles.

Claims (4)

Cylinder member and
The magnetic material arranged in the tubular member and
A shaft member provided at at least one of both ends in the axial direction of the tubular member and fixed to the inner peripheral surface of the tubular member is provided.
The tubular member
A first layer portion formed by compounding a plurality of first fibers oriented in a circumferential direction of the tubular member in a first resin, and
A rotation formed by at least laminating a second layer portion formed by compounding a plurality of second fibers oriented in a state extending in the axial direction of the tubular member in a second resin. It ’s an electric rotor,
The innermost layer of the tubular member is the first layer portion.
A groove extending around the axis of the shaft member is formed on the outer peripheral surface of the shaft member.
A rotor of a rotary electric machine, characterized in that at least a part of the first fiber has entered the groove. The groove is formed so as to extend over the entire circumference of the shaft member in the circumferential direction with respect to the outer peripheral surface of the shaft member.
The rotor of a rotary electric machine according to claim 1, wherein the first fiber is inserted in the groove over the entire circumference in the circumferential direction. The rotor of a rotary electric machine according to claim 1 or 2, wherein bead particles are added to the first resin. The rotor of a rotary electric machine according to any one of claims 1 to 3, wherein the width of the shaft member in the axial direction at the opening edge of the groove is larger than the diameter of the first fiber.