Rotating electric machine

Abstract

The utility model provides a rotary motor, which can sufficiently and uniformly supply cooling liquid to each part of a stator core in the circumferential direction. The rotating electrical machine includes: a stator; the stator core comprises at least two stacked core blocks, each core block is provided with a plurality of circumferential cooling liquid channels, a plurality of radial cooling liquid channels and two fastening holes, the circumferential cooling liquid channels extend at intervals, the radial cooling liquid channels are communicated with the circumferential cooling liquid channels, and the fastening holes are communicated with the radial cooling liquid channels. The circumferential cooling liquid channel of one core block and the circumferential cooling liquid channel of the other core block are arranged in a staggered mode in the circumferential direction, the rotating motor further comprises two fastening pieces inserted into the two fastening holes respectively and a bypass piece communicated with the two fastening pieces, and cooling liquid flow paths are arranged in the fastening pieces; cooling liquid passes through the cooling liquid flow path in the length direction of the fastener, the cooling liquid flow path is provided with a first opening part and a second opening part, the first opening part is communicated with the radial cooling liquid channel, and the second opening part is communicated with the bypass piece.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of actuating devices, in particular to a kind of rotary motor. BACKGROUND

[0002] In recent years, in order to realize the effort active of low-carbon society or decarbonization society, in vehicle, also reduce the emission amount of CO2 or improve energy efficiency, and research and development related to electric vehicle are being carried out for this. The rotary motor of electric vehicle is heated when operating, and needs to be cooled. In the prior art, the stator core of the rotary motor is fastened by bolt, the bolt is provided with a cooling oil flow path for cooling oil to pass through, so that the cooling oil flows from the cooling liquid flow path of the stator housing to the stator core along the bolt to cool the stator core. However, such a cooling oil flow path is difficult to supply cooling oil to each part of the stator core adequately and uniformly. Therefore, it is necessary to improve the rotary motor to overcome the above problems. SUMMARY

[0003] The utility model provides a kind of rotary motor, cooling liquid can be adequately and uniformly supplied to each part of the stator core in the circumferential direction.

[0004] The utility model provides a kind of rotary motor, comprising: stator;And rotor, rotatably be provided in the stator, the stator core of the stator has multiple slots and includes at least two core blocks, the at least two core blocks are stacked along the axial direction of the stator, each of the at least two core blocks has multiple circumferential cooling liquid passages, radial cooling liquid passage and two fastening holes, the multiple circumferential cooling liquid passages extend in the circumferential direction of the stator at intervals, the radial cooling liquid passage extends in the radial direction of the stator and is communicated with one of the multiple circumferential cooling liquid passages, one of the two fastening holes is communicated with the radial cooling liquid passage, the multiple circumferential cooling liquid passages of one of the at least two core blocks are staggered arranged with the multiple circumferential cooling liquid passages of another one of the at least two core blocks in the circumferential direction, the rotary motor further includes two fasteners and bypass piece, the two fasteners are inserted into the two fastening holes respectively to fasten the at least two core blocks, the bypass piece is arranged on the outer surface of the stator core, two ends of the bypass piece are communicated with the two fasteners respectively, each of the two ends has a communication hole for cooling liquid to pass through, each of the two fasteners has a cooling liquid flow path inside, the cooling liquid supplied from the outside of the stator passes through the cooling liquid flow path along the length direction of each of the two fasteners, the cooling liquid flow path has at least one first opening part and at least one second opening part, the at least one first opening part is communicated with the radial cooling liquid passage, and the at least one second opening part is communicated with the communication hole.

[0005] In the embodiment of the utility model, the at least one first opening part of each of the two fasteners comprises a plurality of first opening parts, and the plurality of first opening parts are arranged along the circumference of each of the two fasteners.

[0006] In the embodiment of the utility model, the at least one second opening part of each of the two fasteners comprises a plurality of second opening parts, and the plurality of second opening parts are arranged along the circumference of each of the two fasteners.

[0007] In the embodiment of the utility model, the at least one second opening part of each of the two fasteners is formed in the head of each of the two fasteners, and the two end parts of the bypass part are connected to the at least one second opening of the two fasteners respectively.

[0008] Based on the above, in the rotary electric machine of the utility model, the outer surface of the stator core is additionally provided with the bypass part, and the bypass part is communicated between the two fasteners. Accordingly, the cooling liquid supplied from the outside of the stator can not only flow to the stator core through the fasteners, but also be transmitted between the two fasteners through the setting of the bypass part, so as to reduce the flow difference of the cooling liquid at different positions in the circumference of the stator. Therefore, the rotary electric machine of the utility model can sufficiently and uniformly supply the cooling liquid to each part of the stator core in the circumference.

[0009] In order to make the above features and advantages of the utility model more obvious and easy to understand, the following examples are taken, and the details are described as follows with the help of the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 is a cross-sectional schematic view of the rotary electric machine of an embodiment of the utility model;

[0011] Figure 2 is Figure 1 an exploded view of part components of the rotary electric machine of

[0012] Figure 3 is Figure 2 an exploded view of the stator core of

[0013] Figure 4 and Figure 5 are respectively Figure 3 upper views of different core blocks of

[0014] Figure 6 is Figure 2 a lower view of the bypass part of

[0015] Figure 7 is Figure 6 a partial perspective view of the bypass part of

[0016] Figure 8 is Figure 1 a partial enlarged view of the rotary electric machine of

[0017] Figure 9 is a perspective view of a fastener according to another embodiment of the present application.

[0018] Figure 10 is an exploded view of a part of a rotating electric machine according to another embodiment of the present application;

[0019] Figure 11 is Figure 10 a partial perspective view of a bypass member. Figure 12 is Figure 10 a partial perspective view of a fastener;

[0020] Figure 13 is Figure 10 a partial cross-sectional view of a rotating electric machine;

[0021] Figure 14A and Figure 14B illustrate a combination of a fastener and a bypass member according to another embodiment of the present application.

[0022] BRIEF DESCRIPTION OF DRAWINGS

[0023] 100: rotating electric machine;

[0024] 110: stator;

[0025] 1101: stator housing;

[0026] 1102: stator core;

[0027] 1102a: slot;

[0028] 1102b, 1102c: circumferential coolant passage;

[0029] 1102d: radial coolant passage;

[0030] 120: rotor;

[0031] 130A, 130B, 130C, 230, 330, 430: fastener;

[0032] 140: bypass member;

[0033] 332, 432: head portion;

[0034] 3321, 341, 4321, 441: connecting portion

[0035] 4321a: tapered portion

[0036] 441a: diameter-increasing structure

[0037] A: axial direction;

[0038] B1, B2: communication hole;

[0039] C1-C6: core block;

[0040] CL: coolant;

[0041] D: length direction;

[0042] E1, E2: end portion;

[0043] F1: first opening portion;

[0044] F2, F2': second opening portion;

[0045] H: fastening hole;

[0046] N, N': nut;

[0047] P1, P2: coolant flow path. DETAILED DESCRIPTION

[0048] Figure 1 is a cross-sectional view of a rotary electric machine according to an embodiment of the present application. Figure 2 is Figure 1 is an exploded view of part members of the rotary electric machine. Please refer to Figure 1 and Figure 2 , the rotary electric machine 100 according to the present embodiment is, for example, a rotary electric machine for a vehicle. The rotary electric machine 100 includes a stator 110, a rotor 120, fastening members 130A, 130B, 130C. The rotor 120 is rotatably inserted in the stator 110 in an axial direction A of the stator 110. The stator 110 includes a stator housing 1101 and a stator core 1102, and the stator core 1102 is fastened to the stator housing 1101 by the fastening members 130A, 130B, 130C and has a plurality of slots 1102a for winding coils. The fastening members 130A, 130B, 130C are, for example, bolts.

[0049] Figure 3 is Figure 2 is an exploded view of the stator core. Please refer to Figure 3 , the stator core 1102 according to the present embodiment includes a plurality of core blocks C1-C6, and the core blocks C1-C6 are stacked in the axial direction A of the stator 110 (indicated in Figure 1 ). Each of the core blocks C1-C6 has a plurality of fastening holes (three fastening holes H are shown). Figure 2 The fastening members 130A, 130B, 130C shown in the drawing are respectively inserted into the fastening holes H to fasten the core blocks C1-C6 to the stator housing 1101.

[0050] Figure 4 and Figure 5 are Figure 3 are upper views of different core blocks of Figure 4As shown, the core block C3 has a plurality of circumferential coolant passages 1102b extending at intervals in the circumferential direction of the stator 110 (shown in Figure 1 ). As shown, the core block C4 has a plurality of circumferential coolant passages 1102c extending at intervals in the circumferential direction of the stator 110 (shown in Figure 5 ) and two radial coolant passages 1102d extending in the radial direction of the stator 110 (shown in Figure 1 ) and respectively communicating with two of the plurality of circumferential coolant passages 1102c, and two fastening holes H respectively communicating with the two radial coolant passages 1102d. In the circumferential direction of the stator 110 (shown in Figure 1 ), the plurality of circumferential coolant passages 1102b of the core block C3 and the plurality of circumferential coolant passages 1102c of the core block C4 are arranged alternately. Figure 1

[0051] Please refer to Figure 1 , the rotary electric machine 100 of the present embodiment further includes a bypass member 140, for example, made of resin and provided on the outer surface of the stator core 1102. The two end portions E1, E2 of the bypass member 140 respectively communicate with the two fastening members 130B, 130C, the fastening member 130B has a coolant flow path P1 therein, and the fastening member 130C has a coolant flow path P2 therein. The coolant CL (for example, cooling oil) supplied from the outside of the stator 110 reaches the fastening member 130B via the stator housing 1101, and a portion of the coolant CL flows into the stator core 1102 along the length direction D of the fastening member 130B through the coolant flow path P1. Another portion of the coolant CL reaches the bypass member 140 along the length direction D of the fastening member 130B through the coolant flow path P1, and then reaches the fastening member 130C via the bypass member 140, and then flows into the stator core 1102 along the length direction D of the fastening member 130B through the coolant flow path P1.

[0052] As described above, in the rotary electric machine 100 of the present embodiment, the bypass member 140 is added on the outer surface of the stator core 1102 and communicates between the two fastening members 130B, 130C. Accordingly, the coolant CL supplied from the outside of the stator 110 can be transmitted between the two fastening members 130B, 130C by the provision of the bypass member 140 in addition to being supplied to the stator core 1102 via the fastening member 130B, so as to reduce the flow difference of the coolant CL at different positions in the circumferential direction of the stator 110. Thus, the rotary electric machine 100 of the present embodiment can supply the coolant CL to each portion of the stator core 1102 in the circumferential direction sufficiently and uniformly.

[0053] Figure 6 is a bottom view of the bypass member of Figure 2 .​Figure 7 is Figure 6 a partial perspective view of the bypass member. Figure 8 is Figure 1 a partial enlarged view of the rotary electric machine. In detail, the end portion E1 of the bypass member 140 has a communication hole B1 for the coolant CL to pass through as shown in Figure 6 and Figure 7 , and the end portion E2 of the bypass member 140 has a communication hole B2 for the coolant CL to pass through as shown in Figure 6 and Figure 7 . The coolant flow path P1 has a first opening portion F1 and a second opening portion F2 as shown in Figure 8 , the first opening portion F1 is communicated to one of the two radial coolant passages 1102d, and the second opening portion F2 is communicated to the communication hole B1. Similarly, the coolant flow path P2 (indicated in Figure 1 ) has a first opening portion communicated to the other one of the two radial coolant passages 1102d (shown in Figure 5 ) and has a second opening portion communicated to the communication hole B2 (shown in Figure 7 ). One portion of the coolant CL reaches one of the two circumferential coolant passages 1102c from the coolant flow path P1 of the fastener 130B via the first opening portion F1 and the one of the two radial coolant passages 1102d, and another portion of the coolant CL reaches the coolant flow path P2 (shown in Figure 1 ) of the fastener 130C (shown in Figure 1 ) from the coolant flow path P1 of the fastener 130B via the second opening portion F2, the bypass member 140, and the communication hole B2, and reaches the other one of the two circumferential coolant passages 1102c (shown in Figure 5 ) from the coolant flow path P2 of the fastener 130C via the first opening portion of the coolant flow path P2 and the other one of the two radial coolant passages 1102d (shown in Figure 5 ).

[0054] Figure 9 is a perspective view of the fastener of another embodiment of the utility model. Figure 9The fastener 230 of the illustrated embodiment differs from the fasteners 130B, 130C of the aforementioned embodiments in that the fastener 230 has a plurality of first opening portions F1 disposed along the circumference of the fastener 230 and a plurality of second opening portions F2 disposed along the circumference of the fastener 230. The fastener 230 is, for example, a bolt and is locked in a screwed manner. As described above, the fastener 230 is formed with the plurality of first opening portions F1 arranged in the circumferential direction and the plurality of second opening portions F2 arranged in the circumferential direction, and regardless of the degree to which the fastener 230 is screwed, one of the first opening portions F1 can be connected to the corresponding radial coolant passage and one of the second opening portions F2 can be connected to the bypass member. Specifically, the fastener 230 of the present embodiment has, for example, two through-holes intersecting each other perpendicularly to constitute four first opening portions F1 in the circumferential direction thereof, and the fastener 230 of the present embodiment has, for example, another two through-holes intersecting each other perpendicularly to constitute four second opening portions F2 in the circumferential direction thereof.

[0055] Figure 10 is an exploded view of part members of a rotary electric machine according to another embodiment of the present application. Figure 11 is Figure 10 is a partial perspective view of a bypass member of Figure 12 is Figure 10 is a partial perspective view of a fastener of Figure 13 is Figure 10 is a partial cross-sectional view of a rotary electric machine. Figures 10 to 13 The illustrated embodiment differs from the aforementioned embodiments mainly in that Figures 10 to 13 The second opening portion F2' of the fastener 330 is formed in the head portion 332 of the fastener 330, and the two end portions of the bypass member 340 are connected to the second openings F2' of the two fasteners 330, respectively. The head portion 332 of the fastener 330 has a connecting portion 3321, and the bypass member 340 has a connecting portion 341, and the connecting portion 3321 and the connecting portion 341 can have external threads to be screwed to the internal threads of the nut N as Figure 13 to be combined with each other by the nut N.

[0056] Figure 14A and Figure 14B illustrate a combination method of a fastener and a bypass member according to another embodiment of the present application. Figure 14A and Figure 14B The illustrated embodiment differs from the illustrated embodiment of Figure 13 in that Figure 14A The top of the connecting portion 4321 of the head portion 432 of the fastener 430 has a tapered portion 4321a, and the connecting portion 441 of the bypass member 440 does not have an external thread and has a diameter-expanded structure 441a at the lower end thereof corresponding to the tapered portion 4321a. The connecting portion 4321 of the head portion 432 of the fastener 430 is, for example, screwed to the internal thread of the nut N as Figures 14A to 14BThe conical part 4321a abuts the expanded diameter structure 441a against the nut N' to stably combine and seal the connecting part 4321 with the connecting part 441.

[0057] In summary, in the rotary electric machine of the present application, the bypass member is additionally provided on the outer surface of the stator core and is communicated between the two fastening members. Accordingly, the cooling liquid supplied from the outside of the stator can not only flow to the stator core through the fastening members, but also pass between the two fastening members by the provision of the bypass member, so as to reduce the flow difference of the cooling liquid at different positions in the circumferential direction of the stator. Thus, the rotary electric machine of the present application can sufficiently and uniformly supply the cooling liquid to each part of the stator core in the circumferential direction.

[0058] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, but not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A rotary electric machine characterized by comprising: Comprising: a stator; and a rotor rotatably disposed in the stator, a stator core of the stator has a plurality of slots and includes at least two core blocks stacked in an axial direction of the stator, each of the at least two core blocks has a plurality of circumferential coolant passages extending in a circumferential direction of the stator at intervals, a radial coolant passage extending in a radial direction of the stator and communicating with one of the plurality of circumferential coolant passages, and two fastening holes of which one communicates with the radial coolant passage, the plurality of circumferential coolant passages of one of the at least two core blocks are arranged in the circumferential direction alternately with the plurality of circumferential coolant passages of another of the at least two core blocks, the rotary electric machine further includes two fastening members and a bypass member, the two fastening members are respectively inserted into the two fastening holes to fasten the at least two core blocks, the bypass member is provided to an outer surface of the stator core, both ends of the bypass member respectively communicate with the two fastening members, and each of the both ends has a communication hole through which a coolant passes, each of the two fastening members has a coolant flow path through which the coolant supplied from an outside of the stator passes in a length direction of each of the two fastening members, the coolant flow path has at least one first opening portion and at least one second opening portion, the at least one first opening portion communicates with the radial coolant passage, and the at least one second opening portion communicates with the communication hole.

2. The rotary electric machine according to claim 1, wherein the at least one first opening portion of each of the two fastening members includes a plurality of first opening portions provided in a circumferential direction of each of the two fastening members.

3. The rotary electric machine according to claim 1, wherein the at least one second opening portion of each of the two fastening members includes a plurality of second opening portions provided in a circumferential direction of each of the two fastening members.

4. The rotary electric machine according to claim 1, wherein the at least one second opening portion of each of the two fastening members is formed in a head portion of each of the two fastening members, the both ends of the bypass member are respectively connected to the at least one second opening portion of the two fastening members.

Images