JP7089162B2 - Rotating electric machines and compressors - Google Patents

Description

The present disclosure relates to rotary electric machines and compressors.

In general, a rotating electric machine such as a motor or a generator has a stator and a rotor that rotates with respect to the stator (see, for example, Patent Document 1). In Patent Document 1, the rotor has a core block in which a core member and a bond magnet are integrally molded.

Japanese Unexamined Patent Publication No. 2018-0195224

When the bond magnet is molded, a minute convex portion slightly protruding from the end face of the core block is formed on the bond magnet as a gate mark at the position of the injection gate (spool portion) of the molding die. If end mounting members such as end plates and balance weights are assembled to the axial end face of the core block in this state, the end mounting members will interfere with the gate marks and the axial length of the completed rotor will not be constant. , Product accuracy may decrease.

An object of the present disclosure is to suppress interference between a gate mark and an end mounting member of a core block, and to suppress a decrease in product accuracy.

The first aspect of the present disclosure is
A rotary electric machine equipped with a stator (10) and a rotor (20).
The rotor (20) is
A cylindrical core member (31) in which a magnet slot (34) is formed, and a bond magnet (38) integrally molded with the core member (31) while being housed in the magnet slot (34). With one or more core blocks (30),
An end mounting member (40) mounted on the axial end face of the core block (30) and having a housing recess (40a) for accommodating the gate mark (39) of the bond magnet (38).
It is characterized by having.

In the first aspect, the gate mark (39) formed on the bond magnet (38) integrally molded with the core member (31) is an end mounting member (40) mounted on the end of the core block (30). ) Is accommodated in the accommodating recess (40a). Therefore, the end mounting member (40) does not interfere with the gate mark (39). Therefore, the axial length of the completed rotor (20) is constant, and the deterioration of product accuracy is suppressed.

A second aspect of the present disclosure is, in the first aspect, the first aspect.
The gate mark (39) formed at the position of the gate opening (58a) of the molding die (50) of the bond magnet (38) has the widthwise dimension of the magnet slot (34) as the magnet slot (34). ) It is characterized by being larger than the width dimension of itself.

Here, the gate mark (39) is generally formed to be thinner than the above-mentioned widthwise dimension of the bond magnet (38) because it is generally broken and removed after molding of the bond magnet (38) and post-processed as necessary. ing. In this case, since the passage area of the gate is small, the material for the bond magnet (38) does not easily flow, and the quality of the molded bond magnet (38) may not be stable. On the other hand, according to the second aspect, since the width dimension of the gate mark (39) is larger than the width dimension of the magnet slot (34), the material for the bond magnet (38) tends to flow. , The quality of the bonded magnet (38) to be molded is stable. Further, since the gate mark (39) is accommodated in the accommodating recess (40a) even though it is larger than the width dimension of the bond magnet (38), the end mounting member (40) and the gate mark (39) are Does not interfere.

A third aspect of the present disclosure is in the first or second aspect.
The end mounting member (40) includes an end plate (41), a balance weight (42), or a rotor (20) mounted on the end face of the core block (30). It is characterized in that it is another core block (30b, 30c) of the core block (30a) in which the gate mark (39) is formed in the configuration having 30c).

In a third aspect, in a configuration where the gate mark (39) has an end plate (41), a balance weight (42), or a rotor (20) having a plurality of core blocks (30a, 30b, 30c), the gate mark (30a, 30b, 30c). It is possible to suppress interference with other core blocks (30b, 30c) in which 39) is not formed.

The fourth aspect of the present disclosure is, in any one of the first to third aspects,
Only the end face side of the core block (30) is opened in the accommodating recess (40a) so that the end mounting member (40) becomes a closed space in a state of being mounted on the core block (30). It is characterized by being.

In the fourth aspect, since the gate mark (39) is housed in the storage recess (40a) which is a closed space, for example, in a mechanical device equipped with this rotary electric machine, the fragments of the gate mark (39) are prevented from scattering. Can be suppressed. If the fragment of the gate mark (39) is scattered and bites into a rotating part such as a shaft or a bearing, a malfunction may occur, but according to the fourth invention, the occurrence of such a problem can be suppressed.

A fifth aspect of the present disclosure is
A casing (4), a compression mechanism (3) housed in the casing (4) and compressing the working fluid, and a motor (2) housed in the casing (4) and driving the compression mechanism (3). ) And a compressor
The motor (2) is characterized by being configured by the rotary electric machine according to any one of claims 1 to 4.

In the fifth aspect, since the axial length dimension of the motor (2) used in the compressor is constant and the deterioration of the product accuracy of the motor (2) is suppressed, the operation of the compressor is also stable. The product quality of the compressor can be improved.

FIG. 1 is a vertical cross-sectional view of the compressor according to the first embodiment. FIG. 2 is a cross-sectional view of the compressor showing the cross-sectional shape of the motor excluding the end mounting member. FIG. 3 is a perspective view of the rotor excluding the end mounting member. FIG. 4 is a plan view of the rotor excluding the end mounting member as viewed from the axial direction. FIG. 5 is a sectional view taken along line VV of FIG. 4 of a rotor equipped with an end mounting member. FIG. 6 is a plan view of the plate member. FIG. 7 is a vertical cross section of a molding die for injection molding of a bonded magnet. FIG. 8 is a fixed plan view. FIG. 9 shows a movable cross section (IX-IX line cross section of FIG. 7). FIG. 10 is a cross-sectional view of the rotor according to the first modification of the first embodiment. FIG. 11 is a cross-sectional view of the rotor according to the second modification of the first embodiment. FIG. 12 is a cross-sectional view of the rotor according to the second embodiment. FIG. 13 is a cross-sectional view of the rotor according to the first modification of the second embodiment. FIG. 14 is a cross-sectional view of the rotor according to the second modification of the second embodiment. FIG. 15 is a cross-sectional view of the rotor according to the third embodiment. FIG. 16 is a cross-sectional view of the rotor according to the first modification of the third embodiment. FIG. 17 is a cross-sectional view of the rotor according to the second modification of the third embodiment. FIG. 18 is a cross-sectional view of the rotor according to the third modification of the third embodiment. FIG. 19 is a cross-sectional view of the rotor according to the modified example 4 of the third embodiment. FIG. 20 is a cross-sectional view of the rotor according to the fifth modification of the third embodiment. FIG. 21 is a cross-sectional view of the rotor according to the fourth embodiment. FIG. 22 is a cross-sectional view of the rotor according to the first modification of the fourth embodiment. FIG. 23 is a cross-sectional view of the rotor according to the second modification of the fourth embodiment. FIG. 24 is a plan view of a core block showing a modified example of the bond magnet. FIG. 25 is a plan view of a core block showing another modification of the bond magnet. FIG. 26 is a plan view of a core block showing another modification of the bond magnet. FIG. 27 is a plan view of a core block showing another modification of the bond magnet. FIG. 28 is a plan view of a core block showing another modification of the bond magnet.

<< Embodiment 1 >>
The first embodiment will be described.

FIG. 1 shows a compressor (1) according to the first embodiment. The compressor (1) is used, for example, in a refrigerant circuit (not shown) of an air conditioner. The compressor (1) has a compression mechanism (3) that compresses the working fluid (in this example, the refrigerant in the refrigerant circuit), a motor (2) that is a rotary electric machine that drives the compressor, and a casing (4) that houses them. ) And. As can be seen from FIG. 1, in the compressor (1), the rotating shaft (2a) of the motor (2) is installed so as to be vertical. Further, in the present embodiment, the motor (2) is arranged on the upper side of the compression mechanism (3).

Various compression mechanisms can be adopted for the compression mechanism (3). For example, a rotary compression mechanism or a scroll compression mechanism can be adopted as the compression mechanism (3). In this example, the compression mechanism (3) sucks the fluid (refrigerant) from the suction pipe (3b) provided on the side surface of the casing (4), and discharges the compressed fluid into the casing (4). The fluid discharged into the casing (4) is discharged from the discharge pipe (3c) provided on the upper part (upper end end plate) of the casing (4).

[Configuration of motor (2)]
FIG. 2 is a cross-sectional view of the compressor (1) schematically showing the shape of the motor (2) except for the end plate (41) (end mounting member (40)) described later. The motor (2) is a magnet-embedded motor. As shown in FIG. 2, the motor (2) includes a stator (10), a rotor (20), and a rotating shaft (2a), and is housed in a casing (4) of the compressor (1).

In the following description, the axial direction means the direction of the axis of the rotation axis (2a), and the radial direction means the direction orthogonal to the axial direction. The outer peripheral side means a side far from the axis, and the inner peripheral side means a side close to the axis.

<Stator (10)>
The stator (10) comprises a cylindrical stator core (11) and a coil (16).

The stator core (11) is a so-called laminated core. The stator core (11) is formed by laminating a plurality of plate-shaped members formed by punching an electromagnetic steel sheet into the same shape by a press working machine in the axial direction. The stator core (11) includes one back yoke portion (12), a plurality of (six in this example) teeth portions (13), and a plurality of brim portions (14).

The back yoke portion (12) is an annular portion in a plan view on the outer peripheral side of the stator core (11). The stator core (11) is fitted and fixed so that a part of the outer peripheral surface of the back yoke portion (12) is in contact with the inner peripheral surface of the casing (4).

Further, each tooth portion (13) is a rectangular parallelepiped portion extending in the radial direction in the stator core (11). A coil (16) is wound around each tooth portion (13) by, for example, a centralized winding method, and a coil slot (15) for accommodating the coil (16) in a space between adjacent tooth portions (13). ). As described above, an electromagnet is configured in each tooth portion (13).

The brim portion (14) is a portion continuously overhanging on both sides on the inner peripheral side of each tooth portion (13). Therefore, the brim portion (14) is formed to have a larger width (length in the circumferential direction) than the teeth portion (13). The inner peripheral surface of the brim portion (14) is a cylindrical surface, and the cylindrical surface faces the outer peripheral surface (cylindrical surface) of the rotor (20) at a predetermined distance (air gap (G)). ..

<Rotor (20)>
FIG. 3 shows a perspective view of the rotor (20), and FIG. 4 shows a plan view of the rotor (20) as viewed from the axial direction. Further, FIG. 5 shows a vertical cross-sectional view of the rotor (20). FIG. 5 corresponds to the VV cross section of FIG. The rotor (20) comprises a core block (30). The core block (30) referred to here is one in which a core member (31), which is a laminated core, and a bond magnet (38) forming a magnetic pole are integrally molded.

In this embodiment, the number of core blocks (30) is one. The rotor (20) is composed of a core block (30) and an end plate (41) as an end mounting member (40) mounted on the axial end surface of the core block (30).

In this embodiment, the core block (30) comprises four bonded magnets (38). That is, the rotor (20) has four magnetic poles. The bond magnet (38) is integrally molded with the core member (30) in a state of being housed in a magnet slot (34) described later formed in the core member (30).

The end plate (41) is a disk-shaped member formed by using a non-magnetic material such as stainless steel. The end plate (41) is attached to the upper end surface and the lower end surface of the core block (30) in FIG. 5, respectively. In the present embodiment, the upper end plate (41) is formed with an accommodating recess (40a) for accommodating a gate mark (39), which will be described later, which is formed when the bond magnet (38) is formed. The accommodating recess (40a) is open only on the end face side of the core block (30) so that the end plate (41) is attached to the core block (30) and becomes a closed space. In FIGS. 1 and 5, the thickness of the end plate (41) is exaggerated. The diameter and depth of the accommodating recess (40a) are slightly larger than the diameter and height of the gate mark (39), respectively.

-Core member (31)-
The core member (31) is formed by laminating a plurality of plate members (32) formed by punching an electromagnetic steel sheet having a thickness of, for example, 0.3 to 0.5 mm into the same shape by a press working machine in the axial direction. Has been done. FIG. 6 shows a plan view of the plate member (32) in the present embodiment.

The plate member (32) is formed with a through hole (35) for forming a magnet slot (34). In this example, a cylindrical core member (31) is formed by stacking a large number of plate members (32) and joining the plate members (32) to each other by caulking. The electromagnetic steel sheet, which is the raw material of the plate member (32), is preferably insulated and coated from the viewpoint of suppressing the generation of eddy currents.

In the core member (31), four magnet slots (34) for accommodating the bond magnet (38) are arranged around the axis of the core member (31) at a pitch of 90 °. These magnet slots (34) penetrate the core member (31) in the axial direction. In the magnet slot (34), the shape of the cross section orthogonal to the rotation axis (2a) is the rectangular main body portion orthogonal to the radius of the core member (31) and the outer peripheral side from both ends of the main body portion. It is a shape that combines a bent and extended rectangular part.

As can be seen from FIG. 4, the plate member (32) has a portion having a thin radial width (hereinafter referred to as a bridge portion (32b)) in the vicinity of both ends of the magnet slot (34). In the core member (31), the block facing the outer peripheral side surface of the magnet slot (34) (hereinafter referred to as the outer peripheral block (31a)) and the magnet slot (34) by these bridge portions (32b). It can be seen that the blocks facing the inner peripheral surface are connected to each other (see FIG. 4).

Further, the core member (31) has a shaft hole (33) formed in the center thereof. In the shaft hole (33), a rotating shaft (2a) for driving a load (compression mechanism (3) in this example) is fixed by tightening fitting (for example, shrink fitting). Therefore, the axis (O) of the core member (31) and the axis of the rotation axis (2a) are coaxial. One end of the rotating shaft (2a) is supported by a bearing (3a) provided in the compression mechanism (3).

-Bond magnet (38)-
The bond magnet (38) is formed by mixing fine powdery or granular ferrite magnets or rare earth magnets, which are magnet materials, with a binder such as nylon resin or polyphenylene sulfide resin (PPS resin) and solidifying them. It is a permanent magnet.

In the present embodiment, as will be described later, when the core block (30) is manufactured, the magnet slot (34) of the core member (31) is provided with a non-magnetic powdery or granular magnet material and a binder. A mixed bond magnet material (38a) is supplied and magnetized to form a bond magnet (38).

Both end faces of the bond magnet (38) are exposed to an opening (hereinafter, slot opening (34a)) in the magnet slot (34). A gate mark (39) is formed on one of the exposed end faces. Here, the gate mark (39) is a material supply mark having the shape (usually circular) of the gate opening (58a) formed at the position of the injection gate (58) provided in the molding die (50) described later. It is a minute convex part in the axial direction.

In the present embodiment, as shown in FIG. 4, the gate mark (39) has a width dimension (W2) of the magnet slot (34) larger than the width dimension (W1) of the magnet slot (34) itself. Is also big. The width direction of the magnet slot (34) is the radial dimension of the rotor (20) in the example of FIG. However, the widthwise dimension (W2) of the magnet slot (34) does not always match the radial dimension of the rotor (20) as in the examples of FIGS. 24 and 27 described later, and the bond magnet is used. It may be paraphrased as the dimension in the thickness direction of (38).

[Manufacturing method of rotor (20)]
To manufacture the rotor (20), it is necessary to manufacture the core block (30). Hereinafter, the manufacturing method of the core block (30) will be mainly described.

<Molding mold used for manufacturing>
In the manufacturing process of the core block (30), the core member (31) and the bond magnet (38) are integrally molded by injection molding. FIG. 7 shows a vertical cross section of a molding die (50) for injection molding used in manufacturing the core block (30). As shown in FIG. 7, the molding die (50) is composed of a fixed die (51) and a movable die (52). Note that FIG. 7 shows a state in which the core member (31) is placed in the mold.

As shown in FIG. 7, the fixed mold (51) is formed with a recess (51a) into which the core member (31) can be arranged in an inner fitting shape. The movable mold (52) is a plate-shaped mold provided on the opening side of the recess (51a). Then, the fixed mold (51) and the movable mold (52) are molded, and the concave portion (51a) of the fixed mold (51) is closed by the movable mold (52), whereby the cavity (53) is formed inside. It is configured to be.

FIG. 8 is a plan view of the fixed type (51). FIG. 8 also shows a state in which the core member (31) is placed in the mold. As shown in FIG. 8, in the fixed mold (51), permanent magnets (54) and pole pieces (55) are alternately arranged in the circumferential direction around the recess (51a). The number of pole pieces (55) is provided according to the number of magnetic poles so as to correspond one-to-one with the bond magnet (38) of the rotor (20).

Therefore, the fixed type (51) is provided with four pole pieces (55), and is also provided with the same number of permanent magnets (54) as the pole pieces (55). With this configuration, in the mold (50), a magnetic field can be generated in the cavity (53). Specifically, in the molding die (50), each pole piece (55) applies a magnetic flux from the contacting permanent magnet (54) to the core member (31) set in the cavity (53).

FIG. 9 shows a cross section of the movable type (52) (hatching is omitted). FIG. 9 corresponds to the IX-IX cross section of FIG. In FIG. 9, the position of the core member (31) set in the recess (51a) is shown by a two-dot chain line. The movable type (52) is formed with a spool (56), a runner (57) branched from the spool (56), and an injection gate (58) continuously opened in the cavity (53). The number of injection gates (58) is the same as that of the magnet slots (34). Each injection gate (58) is provided with an opening (hereinafter referred to as a gate opening (58a)) facing the corresponding magnet slot (34) (slot opening (34a)).

The gate mark (39) is formed inside the gate opening (58a) in substantially the same shape as the gate opening (58a). Therefore, the diameter dimension of the gate mark (39) is almost the same as the diameter dimension of the gate opening (58a), and is similar to the widthwise dimension (W2) of the magnet slot (34) in the gate mark (39). The width dimension (W2) of the magnet slot (34) at the gate opening (58a) is also larger than the width dimension (W1) of the magnet slot (34) itself.

<injection molding>
To form the bond magnet (38), first, the molding die (50) is mounted on the injection molding machine, and the core member (31) is placed in the recess (51a) of the fixed die (51). At this time, the core member (31) is positioned in the rotational direction so that the slot opening (34a) and the gate opening (58a) correspond to each other (see FIG. 9).

Next, the fixed mold (51) and the movable mold (52) are molded. At this time, the core member (31) is arranged in the cavity (53) of the molding die (50).

Subsequently, the material for the bond magnet (38a) is injected and supplied from the injection molding machine to the molding die (50), and the material for the bond magnet is supplied from the slot opening (34a) of the core member (31) set in the cavity (53). (38a) is injected (hereinafter, this step is referred to as an injection step), and the magnetic field of the permanent magnet (54) is used to orient the bonded magnet material (38a) in the magnet slot (34).

Here, the material for a bonded magnet (38a) used in the present embodiment is a mixture of a non-magnetic powdery or granular magnet material and a binder. The bonded magnet material (38a), which has been heated and kneaded in an injection molding machine to form a fluid, flows through the spool (56) and runner (57) of the movable type (52) and flows from the injection gate (58) to the cavity (58). Enter 53) and flow into the magnet slot (34). FIG. 7 hatches the bonded magnet material (38a) that passes through the spool (56), runner (57), and injection gate (58).

The bond magnet material (38a) is pushed by the bond magnet material (38a) that is continuously injected from the injection gate (58) and is pushed into the back of the magnet slot (34) (lower part of FIG. 7). The bond magnet material (38a) eventually reaches the bottom surface of the recess (51a).

In the present embodiment, the width direction dimension (thickness direction dimension of the bond magnet (38)) of the gate opening (58a) of the injection gate (58) is the width dimension (W1) of the magnet slot (34) itself. Since it is larger than the above, the bond magnet material (38a) easily flows into the magnet slot (34) and easily spreads in the magnet slot (34), so that the bond magnet (38) can be easily formed.

The injection amount of the injection molding machine is specified so that the bond magnet material (38a) is filled in each magnet slot (34). When a specified amount of injection is completed by the injection molding machine, a bond magnet (38) is formed in the magnet slot (34). In this bond magnet (38), a gate mark (39) is formed at the position of the injection gate (58) on the end face on the injection side of the material (38a) for the bond magnet. Further, the other end surface (lower surface of FIG. 7) of the bond magnet (38) is formed on a flat surface to which the bottom surface of the recess (51a) of the fixed type (51) is transferred. The narrow portion of the gate mark (39) formed inside the injection gate (58) having a diameter smaller than that of the gate opening (58a) is removed.

As shown in FIG. 5, end plates (41) are attached to the upper and lower end faces of the core block (30) manufactured as described above. An end plate (41) having a housing recess (40a) formed is attached to the upper end surface of the core block (30), and a flat end plate (41) is attached to the lower end surface of the core block (30). Will be done. The accommodating recess (40a) on the upper end surface of the core block (30) accommodates the gate mark (39). Therefore, the gate mark (39) does not interfere with the end plate (41).

Although not shown, the lower end plate (41) does not necessarily have to be provided.

After mounting the end plate (41) on the core block (30), the assembly and the rotating shaft (2a) are fixed by, for example, shrink fitting (an example of tightening fitting). The rotation shaft (2a) may be shrink-fitted to the core member (31) before the bond magnet (38) is formed by injection molding.

With the above, the production of the rotor (20) is completed.

[Effects in this embodiment]
As described above, in the first embodiment, the rotor (20) is housed in the cylindrical core member (31) in which the magnet slot (34) is formed and the magnet slot (34). A core block (30) having a bond magnet (38) integrally molded with a member (31) and a gate mark (39) of the bond magnet (38) mounted on the axial end face of the core block (30). It is provided with an end plate (41) in which a storage recess (40a) for accommodating the magnet is formed.

According to the first embodiment, the gate mark (39) of the bond magnet (38) integrally molded with the core member (31) is accommodated in the accommodating recess (40a) of the end plate (40). Therefore, when the end plate (41) is attached to the core block (30), the end plate (41) does not interfere with the gate mark (39). Therefore, since the gate mark (39) does not intervene between the core block (30) and the end plate (41), the axial length of the completed rotor (20) is constant, and the deterioration of product accuracy is suppressed.

Therefore, the product quality of the compressor (1) of the embodiment using the motor (2) as a drive source is improved, and the operation of the compressor (1) is stable.

Further, in the present embodiment, the gate mark (39) formed at the position of the gate opening (58a) of the molding die (50) of the bond magnet (38) in the width direction of the magnet slot (34). The dimension (W2) is larger than the width dimension (W1) of the magnet slot (34) itself.

Here, the gate mark (39) is generally formed as a mark where the solidified portion in the gate (58) is cut off after molding of the bond magnet (38) and post-processed as necessary. The gate (58) is usually thinner than the widthwise dimension (thickness dimension) of the bond magnet (38) in order to facilitate the removal of the solidified portion in the Kate (58). In this case, since the passage area of the gate (58) is small, the material for the bond magnet (38) does not easily flow, and the quality of the molded bond magnet (38) may not be stable.

On the other hand, according to the present embodiment, the width dimension (W2) of the gate mark (39) is larger than the width dimension (W1) of the magnet slot (34), so that it is for the bond magnet (38). The fluidity of the material is improved and the quality of the bonded magnet (38) formed is stable. Further, since the gate mark (39) is housed in the housing recess (40a), the end mounting member (40) and the gate even though the gate mark (39) is larger than the width dimension of the bond magnet (38). It does not interfere with the mark (39). Therefore, deterioration of quality can be suppressed.

In the present embodiment, only the end face side of the core block (30) is such that the accommodating recess (40a) is a closed space with the end mounting member (40) mounted on the core block (30). It has an open recess.

In this way, since the gate mark (39) is housed in the storage recess (40a) which is a closed space, the gate mark (39) is stored in the compressor (1) provided with the motor (2) of the present embodiment. It is possible to suppress the scattering of fragments. If the fragments of the gate mark (39) are scattered and bite into rotating parts such as shafts and bearings, malfunction may occur. However, in this embodiment, the occurrence of such problems can be suppressed, so that the compressor Increased reliability.

-Modification example of Embodiment 1-
<Modification example 1>
FIG. 10 is a cross-sectional view of the rotor (20) according to the first modification of the first embodiment. In this modification 1, the accommodating recess (40a) of the end plate (41) is configured by a through hole that penetrates the end plate (41) in the axial direction of the rotor (20) at a position corresponding to the gate mark (39). Has been done.

Even in this modification, the gate mark (39) does not interfere with the end plate (41). Therefore, it is possible to improve the product accuracy because the variation in the length (axial direction) dimensions of the finished product of the rotor (20) can be suppressed.

<Modification 2>
FIG. 11 is a cross-sectional view of the rotor (20) according to the second modification of the first embodiment. In this modification 2, the accommodating recess (40a) of the end plate (41) is formed at a position corresponding to the gate mark (39) by a groove extending from the position of the gate mark (39) to the outer peripheral surface of the rotor (20). Has been done. This groove is a groove opened on the outer peripheral surface of the rotor (20).

Even in this modification, the gate mark (39) does not interfere with the end plate (41). Therefore, it is possible to improve the product accuracy because the variation in the length (axial direction) dimensions of the finished product of the rotor (20) can be suppressed.

<< Embodiment 2 >>
The second embodiment will be described.

FIG. 12 is a cross-sectional view of the rotor (20) according to the second embodiment. This rotor (20) is an example in which a balance weight (42) is mounted on the core block (30) as an end mounting member (40) instead of the end plate (41) of the first embodiment.

The balance weight (42) is attached to the upper end surface and the lower end surface of the core block (30) in FIG. 12, respectively. In the second embodiment, the upper balance weight (42) is formed with a housing recess (40a) for accommodating the gate mark (39). The accommodating recess (40a) is open only on the end face side of the core block (30) so that the balance weight (42) is attached to the core block (30) and becomes a closed space. The diameter and depth of the containment recess (40a) are sized larger than the diameter and height of the gate mark (39).

The rotor (20) of the second embodiment is configured in the same manner as the first embodiment except that the balance weight (42) is attached to the core block (30) instead of the end plate (41). .. The same as in the first embodiment, the rotating shaft (2a) is fixed to the shaft hole (33) and used in the compressor (1) as a drive source for the compression mechanism (3).

In the second embodiment, the gate mark (39) does not interfere with the balance weight (42). Therefore, the variation in the length (axial direction) dimensions of the finished product of the rotor (20) can be suppressed, and the product accuracy can be improved. Other than that, the same effect as that of the first embodiment can be obtained.

-Modification example of Embodiment 2-
<Modification example 1>
FIG. 13 is a cross-sectional view of the rotor (20) according to the first modification of the second embodiment. In this modification 1, the accommodating recess (40a) of the balance weight (42) is configured by a through hole that penetrates the balance weight (42) in the axial direction at a position corresponding to the gate mark (39). Has been done.

Even in this modification, the gate mark (39) does not interfere with the end plate (41). Therefore, it is possible to improve the product accuracy because the variation in the length (axial direction) dimensions of the finished product of the rotor (20) can be suppressed.

<Modification 2>
FIG. 14 is a cross-sectional view of the rotor (20) according to the second modification of the second embodiment. In this modification 2, the accommodating recess (40a) of the balance weight (42) is formed at a position corresponding to the gate mark (39) by a groove extending from the position of the gate mark (39) to the outer peripheral surface of the rotor (20). Has been done. This groove is a groove opened on the outer peripheral surface of the rotor (20).

Even in this modification, the gate mark (39) does not interfere with the balance weight (42). Therefore, it is possible to improve the product accuracy because the variation in the length (axial direction) dimensions of the finished product of the rotor (20) can be suppressed.

<< Embodiment 3 >>
The third embodiment will be described.

FIG. 15 is a cross-sectional view of the rotor (20) according to the third embodiment. The rotor (20) of the third embodiment has a plurality (two) core blocks (30a, 30B) and a plurality (three) end plates (41).

In the example of FIG. 15, the rotor (20) has a first end plate (41a), a first core block (30a), a second end plate (41b), and a second core block (from the bottom to the top of the figure). 30b) and the third end plate (41c) are laminated in order, and these are fixed to each other.

Gate marks (39) of the bond magnet (38) are formed on the upper end surface of the figure of the first core block (30a) and the upper end surface of the figure of the second core block (30b). The second end plate (41b) and the third end plate (41c) are formed with accommodation recesses (40a) for accommodating the gate marks (39) at positions corresponding to the gate marks (39). The accommodating recess (40a) of the second end plate (41b) is open only on the upper end surface side of the first core block (30a), and the accommodating recess (40a) of the third end plate (41c) is the second core block. Only the upper end surface side of (30b) is open, and a closed space is formed in a state of being mounted on the first core block (30a) and the second core block (30b), respectively. The diameter and depth of the accommodating recess (40a) are set to be slightly larger than the diameter and height of the gate mark (39), respectively, as in the first embodiment.

The rotor (20) of the third embodiment has the same configuration as that of the first embodiment except that the core blocks (30a, 30b) are stacked in two stages. The same as in the first embodiment, the rotating shaft (2a) is fixed to the shaft hole (33) and used in the compressor (1) as a drive source for the compression mechanism (3).

In the second embodiment, the gate mark (39) does not interfere with the end plates (41a, 41b). Therefore, the variation in the length (axial direction) dimensions of the finished product of the rotor (20) can be suppressed, and the product accuracy can be improved. In addition, the same effects as those of the first and second embodiments can be obtained.

<Modification example 1>
FIG. 16 is a cross-sectional view of the rotor (20) according to the first modification of the third embodiment. In this modification 2, as in the example of FIG. 15, the rotor (20) has the first end plate (41a), the first core block (30a), and the second end plate (from the bottom to the top of the figure). 41b), the second core block (30b), and the third end plate (41c) are laminated in order, and these are fixed to each other.

Gate marks (39) of the bond magnet (38) are formed on the lower end surface of the figure of the first core block (30a) and the upper end surface of the figure of the second core block (30b). The first end plate (41a) and the third end plate (41c) are formed with accommodation recesses (40a) for accommodating the gate marks (39) at positions corresponding to the gate marks (39). The accommodating recess (40a) of the first end plate (41a) is open only on the lower end surface side of the first core block (30a), and the accommodating recess (40a) of the third end plate (41c) is the second core block. Only the upper end surface side of (30b) is open, and a closed space is formed in a state of being mounted on the first core block (30a) and the second core block (30b), respectively. The diameter and depth of the accommodating recess (40a) are set to be slightly larger than the diameter and height of the gate mark (39), respectively, as in the first embodiment of FIG.

The rotor (20) of the first modification is configured in the same manner as in the third embodiment except for the positions of the gate mark (39) and the accommodating recess (40a).

Even in this modification 1, the gate mark (39) does not interfere with the end plates (41a, 41b), so that the variation in the length (axial direction) dimensions of the finished product of the rotor (20) can be suppressed and the product accuracy can be improved. ..

<Modification 2>
FIG. 17 is a cross-sectional view of the rotor (20) according to the second modification of the third embodiment. In this modification 2, the rotor (20) has a first end plate (41a), a first core block (30a), a second core block (30b), and a second end plate from the bottom to the top of the figure. (41b) are stacked in order and these are fixed to each other. That is, the first core block (30a) and the second core block (30b) are directly laminated.

Gate marks (39) of the bond magnet (38) are formed on the lower end surface of the figure of the first core block (30a) and the upper end surface of the figure of the second core block (30b). The first end plate (41a) and the second end plate (41b) are formed with accommodation recesses (40a) for accommodating the gate marks (39) at positions corresponding to the gate marks (39). The accommodating recess (40a) of the first end plate (41a) is open only on the lower end surface side of the first core block (30a), and the accommodating recess (40a) of the second end plate (41b) is the second core block. Only the upper end surface side of (30b) is open, and a closed space is formed in a state of being mounted on the first core block (30a) and the second core block (30b), respectively. The diameter and depth of the accommodating recess (40a) are set slightly larger than the diameter and height of the gate mark (39), respectively, as in the example of FIG.

The rotor (20) of the second modification is configured in the same manner as in the third embodiment except that the first core block (30a) and the second core block (30b) are directly laminated. ..

Even in this modification 2, the gate marks (39) do not interfere with the end plates (41a, 41b), so that the variation in the length (axial direction) dimensions of the finished product of the rotor (20) can be suppressed and the product accuracy can be improved. ..

<Modification 3>
FIG. 18 is a cross-sectional view of the rotor (20) according to the third modification of the third embodiment. In this modification 3, the rotor (20) has a first end plate (41a), a first core block (30a), a second end plate (41b), and a second core block (from the bottom to the top of the figure). 30b), the third end plate (41c), the third core block (30c), and the third end plate (41d) are laminated in this order, and these are fixed to each other.

The gate marks (38) of the bond magnet (38) are on the upper end surface of the figure of the first core block (30a), the upper end surface of the figure of the second core block (30b), and the upper end surface of the figure of the third core block (30c). 39) is formed. The second end plate (41b), the third end plate (41c), and the fourth end plate (41d) have a housing recess (40a) for accommodating the gate mark (39) at a position corresponding to the gate mark (39). Are formed respectively. The accommodating recess (40a) of the second end plate (41b) is open only on the upper end surface side of the first core block (30a), and the accommodating recess (40a) of the third end plate (41c) is the second core block. Only the upper end surface side of (30b) is open, and the accommodation recess (40a) of the fourth end plate (41d) is open only on the upper end surface side of the third core block (30c), and each is the first core block. (30a), the second core block (30b), and the third core block (30c) are attached to form a closed space. The diameter and depth of the accommodating recess (40a) are set slightly larger than the diameter and height of the gate mark (39), respectively, as in the example of FIG.

The rotor (20) of the modification 3 has the same configuration as that of the third embodiment of FIG. 15, except that the core blocks (30a, 30b, 30c) are stacked in three stages. The same as in the first embodiment, the rotating shaft (2a) is fixed to the shaft hole (33) and used in the compressor (1) as a drive source for the compression mechanism (3).

In the second embodiment, the gate mark (39) does not interfere with the end plates (41a, 41b). Therefore, the variation in the length (axial direction) dimensions of the finished product of the rotor (20) can be suppressed, and the product accuracy can be improved.

<Modification example 4>
FIG. 19 is a cross-sectional view of the rotor (20) according to the modified example 4 of the third embodiment. In this modification 4, the rotor (20) has the first end plate (41a), the first core block (30a), and the second end plate (from the bottom to the top of the figure, as in the example of FIG. 41b), the second core block (30b), the third end plate (41c), the third core block (30c), and the third end plate (41d) are laminated in this order, and these are fixed to each other.

The gate marks (38) of the bond magnet (38) are on the lower end surface of the figure of the first core block (30a), the upper end surface of the figure of the second core block (30b), and the upper end surface of the figure of the third core block (30c). 39) is formed. The first end plate (41a), the third end plate (41c), and the fourth end plate (41d) have a housing recess (40a) for accommodating the gate mark (39) at a position corresponding to the gate mark (39). Are formed respectively. The accommodating recess (40a) of the first end plate (41a) is open only on the lower end surface side of the first core block (30a), and the accommodating recess (40a) of the third end plate (41c) is the second core block. Only the upper end surface side of (30b) is open, and the accommodation recess (40a) of the fourth end plate (41d) is open only on the upper end surface side of the third core block (30c), and each is the first core block. (30a), the second core block (30b), and the third core block (30c) are attached to form a closed space. The diameter and depth of the accommodating recess (40a) are set slightly larger than the diameter and height of the gate mark (39), respectively, as in the example of FIG.

The rotor (20) of the modified example 4 is configured in the same manner as the modified example 3 except for the positions of the gate mark (39) and the accommodating recess (40a).

Even in this modification 4, the gate mark (39) does not interfere with the end plates (41a, 41b), so that the variation in the length (axial direction) dimensions of the finished product of the rotor (20) can be suppressed and the product accuracy can be improved. ..

In this modification 4, the gate mark (39) does not interfere with the end plates (41a, 41b). Therefore, the variation in the length (axial direction) dimensions of the finished product of the rotor (20) can be suppressed, and the product accuracy can be improved.

<Modification 5>
FIG. 20 is a cross-sectional view of the rotor (20) according to the fifth modification of the third embodiment. In this modification 5, the rotor (20) has a first end plate (41a), a first core block (30a), a second core block (30b), and a second end plate (from the bottom to the top of the figure). 41b), the third core block (30c), and the third end plate (41c) are laminated in order, and these are fixed to each other.

The gate marks (38) of the bond magnet (38) are on the lower end surface of the figure of the first core block (30a), the upper end surface of the figure of the second core block (30b), and the upper end surface of the figure of the third core block (30c). 39) is formed. The first end plate (41a), the second end plate (41b), and the third end plate (41c) have a housing recess (40a) for accommodating the gate mark (39) at a position corresponding to the gate mark (39). Are formed respectively. The accommodating recess (40a) of the first end plate (41a) is open only on the lower end surface side of the first core block (30a), and the accommodating recess (40a) of the second end plate (41b) is the second core block. Only the upper end surface side of (30b) is open, and the accommodation recess (40a) of the third end plate (41c) is open only on the upper end surface side of the third core block (30c), and each is the first core block. (30a), the second core block (30b), and the third core block (30c) are attached to form a closed space. The diameter and depth of the accommodating recess (40a) are set slightly larger than the diameter and height of the gate mark (39), respectively, as in the example of FIG.

The rotor (20) of the modified example 5 is configured in the same manner as the modified example 4 except that the first core block (30a) and the second core block (30b) are directly laminated. ..

Even in this modification 5, the gate mark (39) does not interfere with the end plates (41a, 41b, 41c), so that the variation in the length (axial direction) dimensions of the finished product of the rotor (20) is suppressed and the product accuracy is improved. Be enhanced.

<< Embodiment 4 >>
The fourth embodiment will be described.

FIG. 21 is a cross-sectional view of the rotor (20) according to the fourth embodiment. This rotor (20) is an example in which the configuration of the rotor (20) of the third embodiment having a plurality of core blocks (30a, 30B) and a plurality of end plates (41) is changed. Unlike the third embodiment, this rotor (20) does not form an accommodating recess (40a) only in the end plate (40), but a gate mark (39) is formed among a plurality of core blocks. This is an example in which another core block (30b) (30b, 30c) that is overlapped with the core block (30a) (30a, 30b) is used as the end mounting member (40).

In the fourth embodiment, the rotor (20) has a first end plate (41a), a first core block (30a), and a second core block (from the bottom to the top of the figure, as in the example of FIG. 30b) and the second end plate (41b) are laminated in order, and these are fixed to each other. That is, the first core block (30a) and the second core block (30b) are directly laminated.

Gate marks (39) of the bond magnet (38) are formed on the upper end surface of the figure of the first core block (30a) and the upper end surface of the figure of the second core block (30b). The second core block (30b) and the second end plate (41b) are formed with accommodation recesses (40a) for accommodating the gate marks (39) at positions corresponding to the gate marks (39). The accommodating recess (40a) of the second core block (30b) is open only on the upper end surface side of the first core block (30a), and the accommodating recess (40a) of the second end plate (41b) is the second core block. Only the upper end surface side of (30b) is open, and a closed space is formed in a state of being mounted on the first core block (30a) and the second core block (30b), respectively. The diameter and depth of the accommodating recess (40a) are set to be slightly larger than the diameter and height of the gate mark (39), respectively, as in the first embodiment. The accommodating recess (40a) of the second core block (30b) is composed of through holes formed in a plurality of plate members (32) on the lower end surface side of the plate members (32) constituting the second core block (30b). ing.

The rotor (20) of the fourth embodiment is configured in the same manner as the second modification of the third embodiment except for the positions of the gate mark (39) and the accommodating recess (40a).

Also in the fourth embodiment, since the gate mark (39) does not interfere with the second core block (30b) and the second end plate (41b), the length (axial direction) dimensions of the finished product of the rotor (20) vary. Can be suppressed and product accuracy can be improved. In addition, the same effects as those of the first to third embodiments can be obtained.

<Modification example 1>
FIG. 22 is a cross-sectional view of the rotor (20) according to the first modification of the fourth embodiment. In this modification 1, the rotor (20) has a first end plate (41a), a first core block (30a), a second core block (30b), and a third core block (from the bottom to the top of the figure). 30c) and the second end plate (41b) are laminated in order, and these are fixed to each other.

The gate marks (38) of the bond magnet (38) are on the upper end surface of the figure of the first core block (30a), the upper end surface of the figure of the second core block (30b), and the upper end surface of the figure of the third core block (30c). 39) is formed. The second core block (30b), the third core block (30c), and the second end plate (41b) have a housing recess (40a) for accommodating the gate mark (39) at a position corresponding to the gate mark (39). Are formed respectively. The accommodating recess (40a) of the second core block (30b) is open only on the upper end surface side of the first core block (30a), and the accommodating recess (40a) of the third core block (30c) is the second core block. Only the upper end surface side of (30b) is open, and the accommodation recess (40a) of the second end plate (41b) is open only on the upper end surface side of the third core block (30c), and each is the first core block. (30a), the second core block (30b), and the third core block (30c) are attached to form a closed space. The diameter and depth of the accommodating recess (40a) are set slightly larger than the diameter and height of the gate mark (39), respectively, as in the example of FIG.

The rotor (20) of this modification 1 has three core blocks of a first core block (30a), a second core block (30b), and a third core block (30c), and these are directly laminated. Except for the above configuration, the configuration is the same as that of the fourth embodiment of FIG.

Also in this modification 1, the gate mark (39) does not interfere with the second core block (30b), the third core block (30c), and the second end plate (41b), so that the finished product of the rotor (20) The variation in length (axial direction) dimensions can be suppressed and product accuracy can be improved.

<Modification 2>
FIG. 23 is a cross-sectional view of the rotor (20) according to the second modification of the fourth embodiment. In the second modification, similarly to the fourth embodiment of FIG. 21, from the bottom to the top of the figure, the first end plate (41a), the first core block (30a), the second core block (30b), and The second end plates (41b) are laminated in order, and these are fixed to each other.

This modification 2 is different from the fourth embodiment of FIG. 21 in that the width dimension (W2) of the gate mark (39) is smaller than the width dimension (W1) of the magnet slot (34) itself. There is. In the second modification, the accommodating recess (40a) of the second core block (39) is formed in the bond magnet (38) and is provided in the magnet slot (34). The accommodating recess (40a) of the second end plate (41b) is formed on the lower surface of the second end plate (41b). The diameter and depth of each accommodating recess (40a) are set slightly larger than the diameter and height of the gate mark (39), as in the example of FIG. 21.

The dimension (W2) in the width direction of the gate mark (39) may be the same as the width dimension (W1) of the magnet slot (34) itself. Even in this case, the diameter and depth of each accommodating recess (40a) are set slightly larger than the diameter and height of the gate mark (39).

Other configurations are the same as those of the embodiment of FIG.

Even in this modification 2, the gate mark (39) does not interfere with the second core block (30b) and the second end plate (41b), so that the length (axial direction) dimensions of the finished product of the rotor (20) vary. Can be suppressed and product accuracy can be improved. In addition, the same effects as those of the first to third embodiments can be obtained.

<< Other Embodiments >>
The above embodiment may have the following configuration.

<Modification example of bond magnet (38)>
The bond magnet (38) is not limited to the shape shown in the above embodiment. For example, a bond magnet (38) having the following shape may be adopted.

FIG. 24 shows one modification of the bond magnet (38). In this modification, the bond magnet (38) has a plate-like cross-sectional shape. The bond magnets (38) are provided at eight locations in the circumferential direction of the rotor (20). The width dimension (W2) of the gate mark (39) is larger than the width dimension (W1) of the magnet slot (34) itself.

FIG. 25 shows another modification of the bond magnet (38). In this modification, the bond magnet (38) has a cross-sectional shape in which the outer peripheral side is a protruding arc, and is provided at four locations in the circumferential direction of the rotor (20). Similar to the example of FIG. 23, the gate mark (39) has a width direction dimension (W2) smaller than the width dimension (W1) of the magnet slot (34) itself, and the gate mark (39) is a bond magnet. Although it is smaller than the thickness dimension of (38), such a dimensional relationship may be used.

FIG. 26 shows another modification of the bond magnet (38). In this modification, the bond magnet (38) has a cross-sectional shape in which the inner peripheral side is a protruding arc (referred to as a reverse arc), and is provided at four locations in the circumferential direction of the rotor (20). Similar to FIG. 25, the gate mark (39) has a width dimension (W2) of the magnet slot (34) smaller than the width dimension (W1) of the magnet slot (34) itself.

FIG. 27 shows another modification of the bond magnet (38). In this example, in FIG. 26, the magnet slots of each magnetic pole are partitioned by a bridge-shaped member (center bridge (34b)). That is, in this modification, two bond magnets (38) are provided on each magnetic pole. Each bond magnet (38) has an inverted arc cross-sectional shape. The width dimension (W2) of the gate mark (39) is smaller than the width dimension (W1) of the magnet slot (34) itself.

FIG. 28 shows another modification of the bond magnet (38). In this example, each magnetic pole is provided with a bond magnet (38) having a cross-sectional shape of an inverted arc over multiple layers in the radial direction. The width dimension (W2) of the gate mark (39) is larger than the width dimension (W1) of the magnet slot (34) itself.

<Modified example of arrangement of gate marks and accommodating recesses>
In each of the above embodiments, an example in which the gate mark (39) and the accommodating recess (40a) are arranged substantially in the center of the bond magnet (38) has been described, but the gate mark (39) and the accommodating recess (40a) are, for example, As shown by a virtual line in FIG. 4, the bond magnet (38) may be arranged at a position biased toward the end.

In this configuration, the gate mark (39) and the accommodating recess (40a) are arranged so as not to be rotationally symmetric with respect to the center of the rotor (20). Therefore, according to this configuration, it is possible to prevent the end plate (41) from being attached to the core block (30) in the wrong direction (misassembly). In this configuration, the same effect can be obtained even when the end mounting member (40) is a balance weight (42) or another core block (30b, 30c).

Further, in order to suppress erroneous assembly, the gate mark (39) and the accommodating recess (40a) may be arranged so as not to be rotationally symmetric, other than the arrangement of the virtual line shown in FIG.

<Other variants>
In each of the above embodiments, the motor has been described as the rotary electric machine of the present disclosure, but the configuration of the rotary electric machine may be applied to the generator.

Further, as described with reference to FIGS. 25 to 27, the widthwise dimension (W2) of the gate mark (39) may change the dimensional relationship of the first to fourth embodiments.

In the third and fourth embodiments, the end mounting member (40) on the axial end surface of the rotor (20) may be a balance weight (42) instead of the end plate (41).

Although the embodiments and modifications have been described above, the embodiments and details of the present disclosure can be changed in various ways without departing from the spirit and scope of the claims. Further, the above embodiments and modifications may be appropriately combined or replaced as long as the functions of the subject of the present disclosure are not impaired.

As described above, the present disclosure is useful for rotary electric machines and compressors.

1 Compressor
2 motor (rotary electric machine)
3 compression mechanism
4 Casing
10 stator
20 rotor
30 core block
31 Core member
34 Magnet slot
38 Bond magnet
39 Gate marks
40 End mounting member
40a Containment recess
41 End plate
42 Balance weight
43a 1st core block
43b 2nd core block
43c 3rd core block
50 Mold
58a Gate opening

Claims (4)

A rotary electric machine equipped with a stator (10) and a rotor (20).
The rotor (20) is
A cylindrical core member (31) in which a magnet slot (34) is formed, and a bond magnet (38) integrally molded with the core member (31) while being housed in the magnet slot (34). With one or more core blocks (30),
An end mounting member mounted on the axial end face of the core block (30) and having a housing recess (40a) for accommodating the gate mark (39) of the bond magnet (38).
Equipped with
The end mounting member is another core block (30a) in which the gate mark (39) is formed in a configuration in which the rotor (20) has the plurality of core blocks (30a, 30b, 30c). 30b, 30c)
A rotating electric machine characterized by that. In claim 1,
The gate mark (39) formed at the position of the gate opening (58a) of the molding die (50) of the bond magnet (38) is in the thickness direction of the bond magnet (38) in the magnet slot (34). A rotary electric machine characterized in that the dimension of the magnet slot (34) itself is larger than the dimension in the thickness direction of the magnet slot (34) itself. In claim 1 or 2 ,
The accommodating recess (40a) is open only on the end face side of the core block (30) so that the end mounting member becomes a closed space in a state of being mounted on the core block (30). A rotating electric machine that features it. A casing (4), a compression mechanism (3) housed in the casing (4) and compressing the working fluid, and a motor (2) housed in the casing (4) and driving the compression mechanism (3). ) And a compressor
The compressor (2) is a compressor comprising the rotary electric machine according to any one of claims 1 to 3 .

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