JP3285479B2 - Rotating machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotating machine in which a stator is fixed to a case.

[0002]

FIG. 13 is a sectional view showing a conventional rotating machine. In this figure, a winding 120 is turned around a stator 110 formed by stacking a plurality of iron magnetic plates. The stator 110 is fixed to the case 130 by press fitting or shrink fitting. Brackets 140 and 150 are fixed to both ends of the case 130 with bolts and the like (not shown). The shafts 19 of the rotor 180 are passed through bearings 160 and 170 provided on the brackets 140 and 150.
0 is supported.

Here, when a predetermined power is supplied to the winding 120, a rotating force is generated between the stator 110 and the rotor 180 by an electromagnetic force, and the shaft 180 is used as a rotation axis to rotate the rotor 180.
Rotates. Thus, this conventional rotating machine operates as a motor. Here, when the rotor 180 rotates, especially at the time of starting or braking, a reaction force of the rotating force is generated in the stator 110 in a direction opposite to the rotation direction of the rotor 180. Due to the reaction force of this rotational force, a slip occurs between the stator 110 and the case 130, and in order to prevent the relative position from changing, a hole 200 penetrating from the outer periphery of the case 130 to the stator 110 is formed, and a rivet is formed. 210 was press-fitted.

However, after fixing the stator 110 to the case 130 by press-fitting or shrink-fitting, as shown in FIG. 13, a process of making a hole 200 in the case 130 and the stator 110 is performed, and a rivet 210 is driven there. Therefore, it was necessary to machine the holes 200 during the assembly process. In addition, it is necessary to treat chips generated by the machining.

Further, as described above, in the conventional rotating machine, a hole 200 is formed in the case 130 from the outer circumferential direction.
Since the rivet 210 is press-fitted to the stator 110 and the stator 110 is fixed, the hole 200 needs to be provided in the outer peripheral portion of the case 130.
Thus, the cooling water channel and the like could not be provided on the outer peripheral portion of the case 130. Further, even if a cooling water channel is provided, a sufficient space cannot be secured for the hole 200, so that the cooling efficiency cannot be increased.

Further, Japanese Utility Model Laid-Open No. 5-95153 discloses that
A method is shown in which a protrusion is provided on one of the stator and the case and a recess is provided on the other, and the stator is fixed in the rotation direction. However, if the case is formed of a material having a higher coefficient of thermal expansion than the stator, for example, if the case is formed of aluminum and the stator is formed of iron, the heat generated during the operation of the device will cause the case to change. Thermal expansion causes a gap between the stator and the case, and the stator moves freely in the axial direction because there is no stopper for the stator in the axial direction. It has moved in the axial direction, reducing the efficiency of the device and generating noise due to rattling of the stator.

[0007]

Since the conventional rotating machine is configured as described above, a sufficient cooling water channel cannot be secured on the outer periphery of the case, and the cooling efficiency is reduced. In addition, since the stator is not fixed to the case in the axial direction, when there is a gap between the stator and the case due to thermal expansion, the stator moves in the axial direction with respect to the case. However, the efficiency of the apparatus has been reduced and noise has been generated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a sufficient space for a cooling water channel and the like can be secured on the outer peripheral portion of the case.
It is an object of the present invention to obtain a rotating machine with high efficiency and low noise.

[0009]

A rotating machine according to the present invention comprises a rotor, a stator disposed to face the rotor, a case into which the stator is inserted, and a case outside the case.
Cooling means having a refrigerant therein provided in the peripheral portion, a stepped portion provided on the inner peripheral surface of the case and abutting on one end of the stator, and the stator fixed to the case after the stator is inserted into the case; A fixing member abutting on the other end and a direction from the fixing member to the stator
To a protrusion provided, and a recess provided in the stator, with the stator abuts against the stepped portion and the fixing member, the solid
When the fixing member is fixed to the case, the convex part is inserted into the concave part.
By that, one in which the stator is fixed.

[0010] A rotor, a cylindrical stator disposed to face the rotor, a cylindrical case enclosing the stator, and a cooling case provided on the outer peripheral portion of the case and having an inside.
A cooling means having a medium, a step provided on the inner peripheral surface of the case and in contact with one end of the stator, and the stator inserted into the case.
A fixing member fixed to the case after being brought into contact with the other end of the stator, and a projection provided in the direction of the stator from the fixing member.
And a concave portion provided in the stator, wherein the stator is sandwiched by the step portion and the fixing member, and the fixing member is fixed to the case.
When the protrusion is inserted into the recess , the stator is fixed.

Further, a notch having a cross section corresponding to the shape of the fixing member is provided on the inner periphery of the case.

Further, the fixing member is fixed to the case at a plurality of positions.

A rotor, a stator disposed opposite to the rotor, a case into which the stator is inserted,
Cooling means provided on the outer periphery of the case and having a refrigerant inside
And a bracket to which the case is fixed, a step provided on the inner peripheral surface of the case and abutting on one end of the stator, a fixing member fixed to the bracket and abutting on the other end of the stator ,
A protrusion provided in the stator direction from the member, and a protrusion provided in the stator
And the stator is in contact with the step and the fixing member, and the fixing member is fixed when the fixing member is fixed to the case.
Is inserted into the concave portion, thereby fixing the stator .

[0014]

The position at which the fixing member is fixed to the case is axially outside the position at which the fixing member contacts the stator.

The fixing member is formed integrally with the bracket.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below. Embodiment 1 of the Invention 1 is a sectional view showing a rotating machine according to the first embodiment, FIG. 2 is a partial sectional view showing a fixing structure of a stator, and FIG. 3 is a partial plan view seen from the direction of arrow A in FIG. It is.

In these figures, reference numeral 1 denotes a cylindrical stator formed by stacking a plurality of iron magnetic plates, and 2 denotes a stator 1
Winding. Reference numeral 3 denotes a cylindrical aluminum case into which the stator 1 is inserted and fixed by press-fitting, shrink fitting, or the like, and the stator 1 is included in the inner peripheral portion of the case 3. Reference numerals 4 and 5 denote brackets fixed to both ends of the case 3 by bolts or the like. Reference numerals 6 and 7 denote bearings provided on the brackets 4 and 5 for supporting a shaft 9 (described later). A cylindrical rotor arranged at the center of the device with a gap between
Is an axis serving as a rotation axis of the rotor 8.

Reference numeral 10 denotes a bolt hole corresponding to a bolt 13 (described later) provided in the case 3. 12
Is a plate as a plate-shaped fixing member made of aluminum, and has a hole through which a bolt 13 (described later) penetrates. Reference numeral 13 denotes a bolt as fixing means corresponding to the bolt hole 10. The bolt 13 penetrates the hole of the plate 12 and is screwed into the bolt hole 10 of the case 3 to fix the plate 12 to the case 3. Reference numeral 14 denotes a step provided on the inner periphery of the case 3, and the stator 1 abuts the step 14 from the axial direction. Reference numeral 15 denotes one end surface of the stator 1 that contacts the step portion 14. Reference numeral 16 denotes an end face on the side opposite to the end face 15 in the axial direction. At this end face 16, the stator 1 comes into contact with the plate 12. Reference numeral 17 denotes a notch provided by cutting the inner circumferential surface of the case 3. The notch 17 is used to insert the plate 12 and fix it with the bolt 13. Further, the bolt hole 10 is provided on the bottom surface of the notch 17 and the plate 12 is fixed. The shape of the bottom surface of the notch 17 corresponds to the shape of the plate 12. Are fitted into the bottom surface of the notch 17.

Since the stator 1 is in contact with the step portion 14 of the case 3 and the plate 12 at the end surfaces 15 and 16, respectively, the stator 1 is sandwiched and fixed from both sides in the axial direction, and is fixed in the axial direction. It will not move and cause rattling. In addition, when the stator 1 is inserted, the end face 15 of the stator 1 abuts on the step portion 14 of the case 3 to facilitate positioning of the stator 1. 1
Reference numeral 8 denotes a water channel recessed in the case 3, which is closed by a cover 19 (described later), and provided with an inlet and an outlet (not shown), so that cooling water flows through the water channel 18 to cool the apparatus. In particular, the cooling of the winding 2 and the stator 1 is performed. Reference numeral 19 denotes a cover that seals the water channel 18 to prevent leakage of cooling water. Here, the cooling water flows through the water passage 18, but any other refrigerant may be used, and for example, cooling oil may flow.

Next, the step of fixing the stator will be described.
First, the stator 1 is inserted into the case 3 by press fitting or heat fitting. At this time, the stator 1 is inserted from the direction of arrow A in FIG.
5 come into contact, and the insertion of the stator 1 stops. That is, the step portion 14 can be used for positioning the stator 1 with respect to the case 3. Next, cutout 1 of case 3
The plate 12 is fitted from 7, and the plate 12 is fixed to the case 3 with bolts 13. When the plate 12 fixed to the case 3 presses the end face 16 of the stator 1, the stator 1 is brought into contact with the step portion 14 of the case 3 and the plate 1.
2 and fixed, and the fixing process of the stator 1 is completed. As described above, the stator fixing step is completed only by assembling the respective molded products, so that the stator fixing step becomes easy.

Next, the operation will be described. First, a predetermined power is supplied to the winding 2 from a power source (not shown).
, A magnetic force is generated between the stator 1 and the rotor 8 by the electromagnetic force, and the rotor 8 rotates about the shaft 9. The rotational force of the rotor 8 is transmitted via a shaft 9 to an external device (not shown). Thus, the rotating machine according to the first embodiment operates as a motor. At this time, at the time of operation of the rotating machine, particularly at the time of starting or braking, a reaction force of the rotating force of the rotor 8 is applied to the stator 1, and the rotating direction of the rotor 8 with respect to the case 3 is Try to rotate in the opposite direction. In response to this reaction force, a frictional force is generated on the stator 1 between the plate 12 and the end face 16 of the stator and a frictional force between the step portion 14 of the case 3 and the end face 15 of the stator. The stator 1 is securely fixed to the case 3 even when a reaction force is applied.

Further, the plate 12 is fitted into the notch 17 of the case 3 and the plate 12 is in contact with the side surface of the notch 17 and the plate 12 is fixed so as to be engaged. Even if a reaction force is applied and the reaction force is transmitted to the plate 12 which is in close contact with the stator 1 by frictional force, the plate 12 is notched 17
, The plate 12 does not shift or rotate with respect to the case 3. Also, the plate 12 and the bolt 13 together with the case 3
, The bolt 13 does not come loose.

Since the first embodiment is constructed as described above, the step 14 provided on the inner periphery of the case 3 and the cutout provided on the inner periphery of the case 3 on the opposite side of the step 14 are provided. Chip 1
The stator 1 is sandwiched and fixed in the axial direction by the plate 12 attached to the bolt 7 with the bolt 13, and is also fixed in the rotation direction by the frictional force with the step portion 14 and the plate 12. In addition, the force for fastening the stator 1 from the circumferential direction by the case 3 is small, and the case 3 is thermally expanded so that a gap is opened between the stator 1 and the case 3. Even when a gap is provided between the case 3 and the stator 1, the case 3 and the stator 1 are securely fixed by the step portion 14 and the plate 12. As described above, since the stator 1 can be securely fixed to the case 3, the stator 1 shifts in the circumferential direction to change the distance between the rotor 8 and the stator 1, or shifts in the axial direction to rotate. It is possible to prevent the efficiency of the apparatus from being reduced due to a decrease in the area where the stator 8 and the stator 1 face each other.

Further, unlike the conventional example, it is not necessary to form holes for rivets on the outer periphery of the case 3, so that there is sufficient space for providing a cooling water passage or the like on the outer periphery of the case 3 and the cooling efficiency is improved. Can be improved,
The stator can be fixed in both the rotation direction and the axial direction. In addition, even when a boss for fixing the rotating machine to the outside is provided on the outer periphery of the case 3, the space for providing the boss can be sufficiently used, so that the arrangement and size of the boss can be freely adjusted, For example, by increasing the size of the boss, it is possible to securely fix the rotating machine to the outside.

Further, since the notch 17 is formed according to the shape of the plate 12, the plate 12 is fixed in contact with the notch 17 in the circumferential direction, and is fixed by the bolt 13 in the axial direction. Therefore, the fixing of the plate 12 is assured, and the fixing of the stator 1 fixed by the plate 12 is also assured.

Here, when the engine according to the first embodiment is used as a motor for a moving body, for example, a motor of an electric vehicle, the cooling efficiency can be improved. Long-term operation under high load conditions becomes possible,
Further, the stator does not shift even when the motor is repeatedly started and braked.

Embodiment 2 of the Invention Embodiment 2
Is different from the first embodiment in the structure for fixing the stator by the plate. Here, components having the same configuration as in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. FIG. 4 is a partial cross-sectional view showing a fixing structure of the stator to the case according to the second embodiment, and FIG. 5 is a partial plan view as seen from the direction of arrow B in FIG.

In these figures, reference numeral 20 denotes a groove as a recess provided in the outer peripheral portion of the stator 1 in the axial direction.
Reference numeral 21 denotes a projection as a convex formed by bending a part of the plate 12 in the axial direction. Since the direction of insertion of the projection 21 into the groove 20 is the same as the direction of insertion of the plate 12, the plate 21 is simultaneously inserted into the groove 20 when the plate 12 is fixed by the bolt 13.

Here, by making the entire plate 12 or at least the projections 21 have a higher coefficient of thermal expansion than the stator 1, the temperature of the apparatus rises and the case 3 undergoes thermal expansion and is fixed to the case 3. Even when a gap is formed between the stator 1 and the stator 1, the projection 21 expands and presses the groove 20 of the stator 1, so that the stator 1 can be securely fixed by the projection of the plate 12.

As described above, by inserting the projections 21 of the plate 12 into the grooves 20 of the stator 1, even if a reaction force greater than the frictional force between the plate 12 and the stator 1 is applied to the stator 1, Since the projections 21 of the plate 12 are engaged with the one groove 20, the fixing of the stator 1 in the rotation direction becomes more reliable. Further, since the projections 21 can be formed simultaneously when the plate 12 is pressed, the projections 21 can be easily formed.

Embodiment 3 of the Invention Embodiment 3
Is different from the first embodiment in the structure for fixing the plate to the case. Here, components having the same configuration as in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. FIG. 6 is a partial cross-sectional view showing a fixing structure of the stator to the case according to the third embodiment, and FIG. 7 is a partial plan view seen from the direction of arrow C in FIG.

In these figures, reference numeral 30 denotes an aluminum plate provided with two through holes;
Are two bolt holes provided in the case 3;
Are bolts respectively inserted into the two through holes of the plate 30 and the two bolt holes 31 of the case 3.
Reference numeral 33 denotes a notch formed by cutting the inner peripheral portion of the case 3 into a cylindrical shape.

As described above, since the plate 30 is fixed to the case 3 at a plurality of positions by the two bolts 32, the fixing is particularly ensured in the circumferential direction. For this reason, even if a force is applied to the plate 30 by the reaction force generated in the stator 1, the plate 12 is securely fixed. Also, when the rotor 8 is braked or rotated in the reverse direction, even if a reaction force is generated in the direction opposite to that at the time of starting, the rotor 8 can be securely fixed.

Since the plate 12 does not need to be fixed in the circumferential direction by being inserted into the notch as in the rotating machine in the first embodiment, the notch is preferably formed in a cylindrical shape which is easy to cut. In addition, since the notch can be made larger than the plate 12, the working efficiency in the step of inserting the plate 12 and the step of tightening the bolts 32 can be improved.

Embodiment 4 of the Invention Embodiment 4
The third embodiment is different from the third embodiment in the structure for fixing the stator by the plate. Here, Embodiment 1
Alternatively, components having the same configuration as 3 are denoted by the same reference numerals and description thereof is omitted. FIG. 8 is a partial cross-sectional view showing a structure for fixing the stator to the case according to the fourth embodiment, and FIG. 9 is a partial plan view seen from the direction of arrow D in FIG.

In these figures, reference numeral 40 denotes a plate fixed to the case 3 by two bolts 32,
Reference numeral 41 denotes a projection cut out from the plate 40 by press working. Reference numeral 42 denotes a groove provided on the outer peripheral portion of the stator 1 so that the protrusion 41 is inserted. Here, the projections 41 of the plate 40 are inserted into the grooves 42 when being fixed to the case 3 by the bolts 32.

As described above, since the projection 41 of the plate 40 is inserted into the groove 42 of the stator 1, the engagement of the projection 41 with the groove 42 causes the stator 1 to rotate relative to the case in the rotational direction. The plate 40 is securely fixed to the case 3 because the two bolts 32 fix the plate 40 to the case 3 on both sides of the projection 41.

Since the projections 41 can be formed at the same time when the plate 40 is pressed, the projections 41 can be easily formed.

Embodiment 5 of the Invention Embodiment 5
The fourth embodiment is different from the fourth embodiment in the structure for fixing the plate to the case. Here, components having the same configuration as that of the first, third, or fourth embodiment are denoted by the same reference numerals, and description thereof is omitted. FIG. 10 is a partial cross-sectional view showing a fixing structure of the stator to the case according to the fifth embodiment, and FIG. 11 is a partial plan view seen from the direction of arrow E in FIG.

In these figures, reference numeral 50 denotes a notch shorter than the notch 33 in the fourth embodiment by a length L as shown in FIG. That is, the notch 50 is used to fix the plate with the bolt on the outer side in the axial direction by the length L from the end face 16 of the stator 1. 51
Is a plate fixed to the case 3 by two bolts 32. 52, the plate 51 abuts on the case 3 and is fixed to the case 3 by bolts 32;
Further, it is a fixing surface provided on the case 3 which is also the bottom of the notch 51. Reference numeral 53 denotes a step portion having a length L provided on the plate 51 for connecting a portion fixed to the fixing surface 52 and a portion abutting on the end face 16 of the stator 1.

As described above, by providing a step of length L between the end surface 16 of the stator 1 and the fixing surface 52 of the case 3 to which the plate 51 is attached, the fixing surface 52 in which the bolt holes 31 are provided is directed outward in the axial direction. By moving the water channel 18 by the length L, the size of the water channel 18 provided on the outer periphery of the case 3 can be increased by the length L, so that the cooling efficiency of the device can be improved. . In particular, since the size of the water passage 18 can be increased near the winding 2 that generates heat, the cooling efficiency of the device can be further improved.

In the above second, fourth or fifth embodiment, the groove 20 or 42 is provided in the stator 1. However, any groove may be used as long as the protrusion of the plate fits therein.
It may be a hole.

In the first to fifth embodiments, an aluminum plate is used. However, a spring steel having a spring constant necessary for maintaining a pressing force by which the plate presses the stator may be used. At this time, since the pressing force of the plate against the stator can be increased, the fixing of the stator becomes more reliable.

In the first to fifth embodiments, the plate is fixed by bolts, but may be fixed by press-fitting rivets. Alternatively, a convex portion may be provided on the plate, and the convex portion may be pressed into a hole provided in the case to fix the plate.

Embodiment 6 of the Invention Embodiment 6
Is different from the first embodiment in the structure for fixing the stator. Here, components having the same configuration as in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. FIG. 12 is a sectional view showing a rotating machine according to the sixth embodiment.

In this figure, reference numeral 61 denotes a projecting portion as a cylindrical fixing member projecting from the bracket 5 made of cast iron. The projecting portion 61 comes into contact with the end face 16 of the stator 1 when the bracket 5 is fixed to the case 3. Then, the stator 1 is sandwiched and fixed by the step portion 14 and the projecting portion 61 of the case 3.

As described above, the projecting portion 61 is attached to the bracket 5.
And the stator 1 is fixed by the projecting portions 61, so that the water channel 18 can be made larger, thereby improving the cooling efficiency.

In the sixth embodiment, the protruding portion is formed in a cylindrical shape. However, the protruding portion may be formed in a semicircular shape or a rod shape as long as it comes into contact with and fixed to the stator 1. Further, the projecting portion is integral with the bracket, but the projecting portion may be formed separately from the bracket, and the projecting portion may be fixed to the bracket during assembly.

In the sixth embodiment, a protrusion or a recess is provided in the protruding portion and the stator, and the protrusion is fixed to the recess by engaging the protrusion with the recess. Good. At this time, if the direction in which the protrusion is inserted into the recess is the same as the direction in which the protrusion is inserted into the case, assembly becomes easier.

In each of the above embodiments, the plate or the projecting portion directly contacts the stator, but a material having a larger frictional force is used for the contact surface between the plate or the projecting portion and the stator. A non-slip may be provided. In addition, irregularities are provided on the contact surface between the plate or the projecting portion and the stator,
The unevenness may increase the frictional force between the plate and the stator to further secure the fixing.

In each of the above embodiments, the rotating machine functioning as a motor has been described. However, the present invention can be applied to other rotating machines such as a generator.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a rotating machine according to Embodiment 1 of the present invention.

FIG. 2 is a partial cross-sectional view showing a fixing structure of a stator according to the first embodiment of the present invention.

FIG. 3 is a partial plan view of the fixing structure of the stator according to the first embodiment of the present invention, as viewed from the direction of arrow A in FIG. 2;

FIG. 4 is a partial sectional view showing a fixing structure of a stator according to a second embodiment of the present invention.

FIG. 5 is a partial plan view of a stator fixing structure according to a second embodiment of the present invention, as viewed from the direction of arrow B in FIG. 4;

FIG. 6 is a partial sectional view showing a stator fixing structure according to a third embodiment of the present invention.

FIG. 7 is a partial plan view of a stator fixing structure according to a third embodiment of the present invention, as viewed from the direction of arrow C in FIG. 6;

FIG. 8 is a partial sectional view showing a fixing structure of a stator according to a fourth embodiment of the present invention.

FIG. 9 is a partial plan view of a stator fixing structure according to a fourth embodiment of the present invention, as viewed from the direction of arrow D in FIG. 8;

FIG. 10 is a partial sectional view showing a stator fixing structure according to a fifth embodiment of the present invention.

FIG. 11 is a partial plan view of a stator fixing structure according to a fifth embodiment of the present invention, as viewed from the direction of arrow E in FIG. 10;

FIG. 12 is a sectional view showing a rotating machine according to a sixth embodiment of the present invention.

FIG. 13 is a sectional view showing a conventional rotating machine.

[Explanation of symbols]

1: stator, 3: case, 8: rotor, 12: plate, 14: step, 17: notch, 18: water channel, 20:
Groove, 21: protrusion, 30: plate, 33: notch, 4
0: plate, 41: protrusion, 42: groove, 50: notch, 51: plate, 53: stepped portion, 61: projecting portion.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-5-328644 (JP, A) JP-A-8-196049 (JP, A) Japanese Utility Model 1986-38840 (JP, U) Japanese Utility Model 1983 134050 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) H02K 5/20 H02K 5/04 H02K 1/18

Claims (7)

(57) [Claims] And 1. A rotor, a stator disposed to face the rotor, a case where this stator is inserted, the
Cooling means provided on the outer periphery of the case and having a refrigerant inside
A step provided on the inner peripheral surface of the case and in contact with one end of the stator, and a fixing member fixed to the case after the stator is inserted into the case and in contact with the other end of the stator. And provided in the stator direction from the fixing member.
A stator having a protrusion and a recess provided in the stator;
With but in contact with the stepped portion and the fixing member, the
When the fixing member is fixed to the case, the convex portion is
A rotating machine , wherein the stator is fixed by being inserted into the rotating machine. 2. A rotor, a cylindrical stator disposed to face the rotor, a cylindrical case enclosing the stator, and a refrigerant provided in an outer peripheral portion of the case and containing refrigerant therein.
Cooling means, a step provided on the inner peripheral surface of the case and abutting against one end of the stator , and the stator
A fixing member fixed to the case after being inserted into the base, and abutting against the other end of the stator, and fixed from the fixing member
A convex portion provided in the child direction, and a concave portion provided in the stator, wherein the stator is sandwiched by the step portion and the fixing member, and the fixing member is fixed to the case. Above
A rotating machine, wherein the stator is fixed by inserting a convex portion into the concave portion . 3. A rotary machine according to claim 1, characterized in that a notch having an inner circumference corresponding to the shape of the fixing member to the cross section of the case. 4. A rotary machine according to claim 1, wherein said fixing member, characterized in that it is fixed at a plurality of positions in the case. 5. A rotor, a stator disposed to face the rotor, a case where this stator is inserted, the
Cooling means provided on the outer periphery of the case and having a refrigerant inside
When the bracket the case is fixed, one end of the stator provided on the inner peripheral surface of the case abutting step portion is fixed to the bracket, and the fixing member abuts against the other end of the stator Is provided in the direction from the fixing member to the stator
Together with the convex portion that is provided with a recess provided in the stator, the said stator is brought into contact with the stepped portion and the fixing member
In addition, when the fixing member is fixed to the case,
By being inserted into the recess, the rotating machine, characterized in that the stator is fixed. 6. The rotary machine of claim 2, wherein said fixing member is positioned to be fixed to the case is axially outside the position where the fixing member comes into contact with the stator. 7. The rotating machine according to claim 5, wherein said fixing member is formed integrally with said bracket.