JP2000102217A - Dynamo-electric machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent flooding from the outside of a mating surface with a outer frame by forming a concentric annular rib on the outer surface of an end bracket, at least at one side. SOLUTION: In a dynamo-electric machine 1, a shaft 3 is provided with a rotor 4 and is rotatably supported by bearings 5 and 6. Also, the bearings 5 and 6 are retained by a front-side end bracket 7 and a rear-side end bracket 8, and an outer frame 10 for retaining a stator 9 is located between the end brackets 7 and 8 at both sides. Then, a refrigerant passage 11 is formed at the frame 10, an O-ring 12 is provided on a mating surface with the rear-side end bracket 8, and at the same time a circumferential rib 17 is formed concentrically on the outer surface of the rear-side end bracket 8, thus increasing the stiffness of the outer end part of the end bracket and reducing the opening of the mating surface between the bracket and the coating frame and hence preventing flooding from the outside.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a rotating electric machine,
In particular, the present invention relates to a structure of a mating surface of an end bracket and a jacket frame mainly of a closed type or a closed water-cooled rotary electric machine.

[0002]

2. Description of the Related Art A rotating electric machine bracket disclosed in Japanese Patent Application Laid-Open No. 6-189488 is formed by drawing and has a steel plate bracket having a frame fitting portion at an outer peripheral portion and a bearing fitting portion at a central portion. A main body and an auxiliary plate made of a steel plate fixed to the side surface of the bracket main body. A plurality of ribs are formed by cutting and bending one of the bracket main body and the auxiliary plate, and the other is formed by cutting and bending. A plurality of armor windows are formed, and a hole formed by forming the rib and an opening of the armor window communicate with each other.

[0003]

The ribs of the end bracket for the prior art rotary electric machine described above only describe the strength ribs against the load supporting the rotor, and also describe the open type air-cooled rotary electric machine. No consideration is given to the ingress of water from the outside between the end bracket and the outer surface of the outer frame in the hermetically sealed or hermetically sealed water-cooled rotary electric machine. There is a problem that water may be immersed in the rotating electric machine from the outside through the gap between the outer and outer frame mating surfaces.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sealed or water-cooled rotary electric machine for preventing water from entering the outside of the mating surface between the end bracket and the jacket, and furthermore, the end of the rotary electric machine having excellent heat radiation characteristics. It is an object to provide a bracket and a jacket frame.

[0005]

In order to achieve the above object, the present invention provides an annular rib concentric with the end bracket on the outer surface of at least one end bracket of a closed type or closed type water cooled rotary electric machine. It is formed.

Another feature of the present invention is that an arc-shaped rib is formed on the outer surface of at least one end bracket of a closed type or closed type water cooled rotary electric machine.

Another feature of the present invention is that a linear rib is formed on the outer peripheral portion of the outer surface of at least one of the end brackets of the sealed or water-cooled rotary electric machine.

Another feature of the present invention is that the rib is formed on the inner surface of the end bracket.

Another feature of the present invention is that the ribs are formed on both the outer surface and the inner surface of the end bracket.

Another feature of the present invention is that the ribs are formed on both sides of the end bracket on the output side and on the side opposite to the output shaft.

Another feature of the present invention is that the ribs having various shapes as described above are applied to the terminal box.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows a hermetically sealed waterproof water-cooled electric vehicle rotating electric machine 1 to which the present invention is applied, and a control device 2 for controlling the same.
FIG. 2 is an external view of a control device-integrated electric rotating machine for an electric vehicle, which has an integral structure. FIG. 2 is an axial half-sectional view of FIG.

The rotating electric machine 1 of the present embodiment has a rotor 3 on a shaft 3 and is rotatably supported by bearings 5 and 6. The bearings 5 and 6 are held by a front end bracket 7 and a rear end bracket 8, and a jacket frame 10 for holding a stator 9 is provided between the end brackets 7 and 8. The jacket frame 10 is spigot-fitted to both end brackets 7 and 8 and fastened by bolts. Reference numeral 2 denotes a control device, which includes an inverter for converting DC power into AC power and supplying the AC power to the rotating electric machine, and a control unit therefor.

A coolant passage 11 is formed in the jacket frame 10. An O-ring 12 is provided on the mating surface between the outer frame 10 and the rear end bracket 8, and has a structure for sealing ingress of water or the like from the outside.

FIG. 3 is a view of the rotating electric machine of FIG. 1 as viewed from the rear end bracket 8 side. The rotating electric machine 1 of the present embodiment has an integral structure with the control device 2, and has a terminal box portion 13 penetrating through the rotating electric machine 1 and the control device 2 for electrical connection. As shown in FIG. 2, a cable 14 through which electric power is supplied from the control device 2 to the rotating electric machine 1 passes through this through portion. Rotating electric machine 1 of the present embodiment
In addition, since the control device 2 has a sealed waterproof structure, in order to pass the cable 14 through the terminal box 13 penetrating from the rotary electric machine 1 to the control device 2 while maintaining the waterproof structure, the terminal box 13 has The dimensions require a certain amount of space in the circumferential direction of the rotating electric machine 1.

For this reason, the arrangement pitch of the bolts 15 for connecting the rear end bracket 8 and the jacket frame 10 must be made wider only in the terminal box 13 than in other parts. Since the rotating electric machine 1 and the control device 2 of the present embodiment have a hermetically sealed waterproof structure, if the arrangement pitch of the bolts 15 is too large, the surface pressure of the mating surface of this portion decreases, and the rear end bracket 8 and the outer frame 10 A gap is easily generated in the mating surface, and there is a concern that water or the like may enter from outside.

In order to minimize the generation of a gap between the mating surface of the rear end bracket 8 and the outer frame 10, a circumferential rib 17 is formed on the outer surface of the rear end bracket 8 concentrically with the rear end bracket 8. The rigidity of the mating surface portion can be increased by forming a rib shape as shown in FIG. 2 and the opening of the mating surface between the rear end bracket 8 and the outer frame 10 is suppressed, This has the effect of preventing intrusion of water or the like from outside.

If a plurality of these ribs 17 are set concentrically, the effect of preventing flooding is further improved.

In addition, even if the ribs 17 are used in portions where the pitch of the bolts 15 is narrow, there is an effect of preventing flooding.

Instead of providing concentric ribs 17 on the outer surface of the rear end bracket 8, as shown in FIG. 4, arc-shaped ribs 18 connecting two widely spaced bolts 15 are provided. May be formed.

Instead of providing concentric ribs 17 on the outer surface of the rear end bracket 8, as shown in FIG. May be formed on the outer peripheral portion of the rear end bracket 8.

The same effect can be obtained by providing the ribs 17 to 19 not on the outer surface of the rear end bracket 8 but on the inner surface of the rear end bracket of the rotary electric machine 1 as shown in FIG. can get.

Further, as shown in FIG.
The effect is further enhanced by providing 19 on both sides of the outer surface and the inner surface of the rear end bracket 8.

The same effect can be obtained by providing ribs 21 and 22 not only on the rear end bracket 8 but also on the front end bracket 7 as shown in FIG.

These ribs can also increase the surface area of both end brackets 7 and 8, so that the heat radiation effect can be improved and the cooling performance of the rotating electric machine 1 can be improved.

Further, as shown in FIG.
The same effect can be obtained by providing the reference numeral 19 on the inside or outside or inside and outside of the terminal box 13 on the mating surface of the jacket frame 10 with the rear end bracket 8 as shown at 23 and 24.

Further, as shown in FIG. 1, since the rotating electric machine 1 for an electric vehicle according to the present embodiment and the control device 2 for controlling the same are integrated, the heat generated by the cable 14 passes through the through portion of the terminal box 13. In this case, the signal is transmitted through the cable 14 and enters the control device 2. Therefore, the heat dissipation can be improved by the ribs 23 and 24 formed in the penetrating portion of the terminal box portion 13, the cooling performance can be improved, and the control device 2 can be improved.
Has the effect of reducing the thermal effect on

Each of the ribs is not only a unit having an integrated structure of the rotating electric machine 1 and the control device 2 of this embodiment, but also a closed type or a closed water-cooled type rotating device in which the rotating electric machine 1 and the control device 2 are separated. Also applicable to electric machines.

As shown in FIG. 10, the rotary electric machine 26 used for driving the electric vehicle 25 is generally of a hermetically sealed waterproof type for the purpose of protecting the current-carrying part from a severe use environment. The use environment may be exposed not only to an environment exposed to water but also to an atmosphere containing salt. If water containing salt enters from a gap such as a mating surface between the rear end bracket 8 and the outer frame 10, corrosion occurs.

Therefore, by forming the rib shape as in the present invention on the mating surface of the end bracket and the outer frame, there is an effect of improving the rigidity of the mating surface, the clearance can be reduced, and a countermeasure against corrosion due to salt damage is provided. Is also effective.

These rib shapes can also be applied to a rotating electric machine for a hybrid electric vehicle 29 in which an engine 27 and a rotating electric machine 28 are combined as shown in FIG.

[0033]

According to the present invention, in a sealed type or sealed water-cooled type rotating electric machine, at least one end bracket has a concentric circumferential rib on the outer surface or inner surface, or on both inner and outer surfaces. By forming the end bracket, the rigidity of the outer edge portion of the end bracket can be increased, and the opening of the fitting surface between the bracket and the jacket frame can be reduced, so that there is an effect of preventing water from entering from outside.

Further, since the surface area is increased by the ribs and the heat radiation effect can be improved, it can contribute to the cooling performance.

The same effect as described above can be obtained by forming ribs inside and outside the terminal box.

[Brief description of the drawings]

FIG. 1 is an external view of a hermetically sealed waterproof electric rotating machine for an electric vehicle to which an embodiment of the present invention is applied.

FIG. 2 is an axial half-sectional view of the hermetically sealed waterproof electric vehicle rotating electric machine of FIG. 1;

FIG. 3 is a view of the rotating electric machine of FIG. 1 as viewed from a side of a rear end bracket.

FIG. 4 is a view of a rotating electric machine according to another embodiment of the present invention as viewed from a rear end bracket.

FIG. 5 is a view of a rotating electric machine according to another embodiment of the present invention as viewed from a rear end bracket.

FIG. 6 is a half sectional view in the axial direction of a rotating electric machine having a rib formed inside a rear end bracket according to another embodiment of the present invention.

FIG. 7 is a half sectional view in the axial direction of a rotary electric machine in which ribs are formed inside and outside a rear end bracket according to another embodiment of the present invention.

FIG. 8 is a half sectional view in the axial direction of a rotating electric machine according to another embodiment of the present invention, in which ribs are formed inside and outside of a rear end bracket and a front end bracket.

FIG. 9 is a half-sectional view in the axial direction of a rotary electric machine according to another embodiment of the present invention, in which ribs are formed on both sides inside and outside a jacket frame terminal box.

FIG. 10 is a diagram showing an example in which a vehicular rotating electric machine to which the present invention is applied is used for an electric vehicle.

FIG. 11 is a diagram showing an example in which a rotating electric machine for a vehicle to which the present invention is applied is used for a hybrid vehicle with an engine.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 rotary electric machine for electric vehicle 2 control device 7 front end bracket 8 rear end bracket 10 outer frame 12 O-ring 13 terminal box 14 cable 15 bolt 17 concentric rib 18 arcuate rib 19 outer edge linear rib 20 rear side End bracket inner rib 21 Front side end bracket outer rib 22 Front side end bracket inner rib 23 Terminal box inner rib 24 Terminal box outer rib 25 Electric vehicle 26 Electric motor rotating electric machine 27 Hybrid electric vehicle engine 28 Hybrid electric vehicle Rotating Electric Machine 29 Hybrid Electric Vehicle

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Tsuyoshi Nakajima 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. (72) Inventor Tadaaki Iiyama 2 Takara-cho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor F Terms (reference) 5H609 BB01 BB19 PP01 PP02 PP05 QQ02 QQ04 QQ10 QQ23 RR35 RR38 RR40 RR42 RR63 RR67 RR73 SS02

Claims (9)

[Claims] 1. A closed-type or closed-water-cooled rotary electric machine, wherein at least one annular rib is formed concentrically with at least one end bracket on an outer surface of at least one end bracket. 2. A sealed electric machine or a sealed water-cooled electric machine, wherein at least one arc-shaped rib is formed on an outer surface of at least one end bracket. 3. A sealed electric machine or a sealed water-cooled electric rotating machine, wherein at least one linear rib is formed on an outer peripheral portion of an outer surface of at least one end bracket. 4. The rotating electric machine according to claim 1, wherein said rib is formed on an inner surface of at least one end bracket. 5. The rotating electric machine according to claim 1, wherein said ribs are formed on both sides of an outer surface and an inner surface of at least one end bracket. 6. The rotating electric machine according to claim 1, wherein said ribs are formed on end brackets on an output shaft side and an opposite output shaft side. 7. The rotating electric machine according to claim 1, further comprising a control device and a terminal box.
The rotating electric machine wherein the rib is formed outside the terminal box portion. 8. The rotating electric machine according to claim 1, further comprising a control device and a terminal box.
The rotating electric machine wherein the rib is formed inside the terminal box. 9. The rotating electric machine according to claim 1, further comprising a control device and a terminal box.
A rotating electric machine wherein the ribs are formed on both inside and outside of the terminal box.