JPH06245429A - Generator - Google Patents

Abstract

PURPOSE:To abolish a rotor shaft and to reduce the number of components in a generator in which a coil is mounted in a core and a rotor to be coupled with an engine shaft is rotatably contained in a housing. CONSTITUTION:A core 141 has a first core part 17 in which a plurality of first core plates are laminated and an engaging hole 22 having a keyway 21 on an inner surface is formed at a center, and a second core part 18 in which a plurality of second core plates are laminated and superposed on the part 17 at a second bracket 8 side with an insertion hole 23 continued to the hole 22. An end of an engine shaft 131 rotatably passed through the bracket 7 is engaged with the hole 22 in a state that a relative rotation is prevented by a key 27, and a connecting bolt 201 to be inserted to the hole 23 with an engaging head 20a to be engaged with the part 18 at the bracket 8 side is engaged with the shaft 131.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor having a first core and a second bracket at both ends, a rotor having a coil attached to an iron core, and the rotor being rotatably housed in the rotor. It relates to a generator to which a shaft is connected.

[0002]

2. Description of the Related Art Conventionally, such a generator is already known from, for example, Japanese Utility Model Publication No. 1-39097.

[0003]

The rotor of the conventional generator described above is constructed by mounting an iron core and a coil on a rotor shaft, and the rotor shaft is connected to the engine shaft. However, different types of rotor shafts must be used depending on the thickness of the iron core in the axial direction and the shape of the end of the engine shaft depending on the generator model. Therefore, it is necessary to prepare the rotor shaft of, and the number of parts increases.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a generator in which the rotor shaft is eliminated and the number of parts can be reduced.

[0005]

In order to achieve the above object, according to the invention of claim 1, the iron core is formed by laminating a plurality of first iron core plates and has a key groove on the inner surface thereof. A first iron core portion having a dowel hole formed in the center portion and a plurality of second iron core plates are laminated, and an insertion hole continuous with the fitting hole is provided, and the first iron core portion is provided on the second bracket side. An end portion of an engine shaft that includes a second iron core portion that is overlapped and that rotatably penetrates the first bracket, is fitted into a fitting hole in a state where relative rotation is blocked by a key that engages with the key groove. A connecting bolt having a locking head portion that is engaged with the second iron core portion on the second bracket side and is inserted into the insertion hole is screwed onto the engine shaft.

According to the second aspect of the present invention, the iron core is formed by laminating a plurality of first iron core plates, and a first iron core portion having a fitting hole having a key groove on the inner surface is formed in the central portion. And a second iron core portion that is formed by stacking a plurality of second iron core plates and has an insertion hole that is continuous with the fitting hole and that is overlapped with the first iron core portion on the second bracket side. The end of the engine shaft is fitted to the outer end of the connecting shaft that is rotatably passed through the bracket and inserted into the housing, and the inner end of the connecting shaft is opposed by a key that engages with the key groove. The connecting bolt, which is fitted in the fitting hole in a state where rotation is blocked and has a locking head part that is engaged with the second iron core part on the second bracket side, is inserted into the insertion hole and the connecting shaft. It is screwed onto the shaft.

Further, according to the invention of claim 3, in addition to the constitution of the invention of claim 1 or 2, the iron core is
The first and second iron core portions are laminated with a plurality of third iron core plates, and a supporting hole having a diameter larger than that of the insertion hole is provided in the central portion so that the second iron core portion is superposed on the second bracket side. And a third iron core portion, the cylinder being fitted to the support hole on the second bracket side of the third iron core portion with a bearing interposed between the third iron core portion and a support protrusion provided on the second bracket. The holder with the parts is superposed and the locking head of the connecting bolt is engaged with the holder.

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 show a first embodiment of the present invention. FIG. 1 is a vertical sectional side view of a generator equipped with a double-support type rotor, and FIG. 2 is a line 2-2 in FIG. 1 is a front view of the first iron core plate viewed from the direction of the arrow, FIG. 3 is a front view of the second iron core plate viewed from the direction of the arrow 3-3 of FIG. 1, and FIG.
FIG. 5 is a front view of the third iron core plate as viewed from the direction of arrow 4 and FIG. 5 is a longitudinal sectional view of a cantilever support type rotor.

First, referring to FIG. 1, a housing 5 of the generator is a first bolt fastened to each other by a plurality of bolts 6.
The annular iron core 10 of the stator 9 is sandwiched between the second brackets 7 and 8, and the coil 11 is wound around the annular iron core 10.

A rotor 12 ₁ located inside the stator 9 is rotatably accommodated in the housing 5. The rotor 12 ₁ comprises an iron core 14 ₁ connected to the engine shaft 13 ₁ and a coil 16 wound around the iron core 14 ₁ via a bobbin 15. The iron core 14 ₁ includes a first iron core portion 17 and A second iron core portion 18 overlapped with the second bracket 8 side of the first iron core portion 17 and a third iron core portion 19 overlapped with the second bracket 8 side of the second iron core portion 18 are attached to the engine shaft 13 ₁ . the connecting bolt 20 ₁ to be screwed are those formed by binding to each other.

The first iron core portion 17 is formed by laminating a plurality of first iron core plates 17a formed in the shape shown in FIG. 2 on one another, and the central portion of the first iron core portion 17 is formed. Has a fitting hole 2 having an axially extending key groove 21 on its inner surface.
2 is formed. The second iron core portion 18 is formed by laminating a plurality of second iron core plates 18a formed in the shape shown in FIG. 3 on each other. An insertion hole 23 is formed coaxially with the fitting hole 22 while being overlapped with the iron core portion 17. Further, the third core portion 19 is configured by laminating a plurality of third core plates 19a ... Formed in the shape shown in FIG.
The third iron core portion 19 is provided with a support hole 24 which is coaxial with the insertion hole 23 and overlaps with the second iron core portion 18. Thus, the first, second and third iron core plates 17a, 18
The a and 19a are formed to have the same outer shape, and the insertion hole 23 is formed to have a smaller diameter than the fitting hole 22 and the support hole 24 on both sides thereof.

The engine shaft 13 ₁ is inserted into the housing 5 by rotatably passing through a through hole 25 provided in the central portion of the first bracket 7. Engine shaft 13
A key groove 26 corresponding to the key groove 21 of the fitting hole 22 is provided at the end of ₁ and the engine shaft 13 is locked in a state in which relative rotation is blocked by a key 27 engaged with both the key grooves 21 and 26. ₁ end is fitted into the fitting hole 22 of the first core portion 17.

A holder 28 is superposed on the second bracket 8 side of the third iron core portion 19. The holder 28 includes a thin plate ring-shaped base portion 28a which is overlapped with the end surface of the third iron core portion 19 on the second bracket 8 side, a cylindrical portion 28b which is continuously provided on the inner peripheral edge of the base portion 28a, and a cylindrical portion 28b. It has a locking brim portion 28c that extends radially inward from the tip. Thus, the cylindrical portion 28b is formed in a stepped shape with the tip end side having a small diameter, and is fitted into the support hole 24 so that the locking brim portion 28c is brought into contact with the second iron core portion 18. On the other hand, the second bracket 8 is integrally provided with a cylindrical support protrusion 29 that is coaxially inserted into the cylinder portion 28b, and a bearing is provided between the support protrusion 29 and the cylinder portion 28b. The needle bearing 30 is installed.

Connecting bolt 20₁Has a head that locks at one end
20a, and the locking head 20a is locked with a locking collar.
A connecting bolt that engages with the portion 28c and is inserted into the insertion hole 23
20 ₁Is the engine shaft 13₁Be screwed to the end of
And the iron core 14₁Is the engine shaft 13₁Linked to
To be done.

A fan 31 is connected to the bobbin 15 of the rotor 12 ₁ so as to surround the engine shaft 13 ₁ .

By the way, the first, second and third iron core parts 1
Two-sided support type rotor 12 by 7, 18 and 19
Although it constitutes _one, as shown in Figure 5, when configuring the rotor 12 _{and second} cantilevered type, eliminating the need for third core portion 19.

The rotor 12 ₂ is the engine shaft 1
The core 14 ₂ connected to 3 ₁ and the coil 16 wound around the core 14 ₂ via the bobbin 15
Reference numeral ₂ denotes a structure in which a first iron core portion 17 and a second iron core portion 18 superposed on the first iron core portion 17 are coupled to each other by a connecting bolt 20 ₁ screwed to the engine shaft 13 _1. .

That is, the double-supported type rotor 12₁
The third iron core part 19 is omitted from the above, and the second iron core part 18 is locked to the head.
A connecting bolt that engages 20a and is inserted into the insertion hole 23.
20 ₁Is the engine shaft 13₁By being screwed into
Rotor 12₂Is configured.

Next, the operation of the first embodiment will be described. The iron core 1 in the double-supported type rotor 12 ₁ .
4 ₁ is a first iron core portion 17, a second iron core portion 18 overlapped with the first bracket portion 17 on the second bracket 8 side, and a third iron core portion 18 overlapped with the second iron core portion 18 on the second bracket 8 side. Iron core part 19
DOO is, which consists coupled to each other by connecting bolts 20 ₁ to be screwed into the engine shaft 13 _1, the engine shaft 13 ₁ in a state of being prevented relative rotation the fitting portion 22 of the first core portion 17 Of the third iron core part 1
The holder 28, which is superposed on the support member 9, is supported by the support projection 29 via a needle bearing 30. The iron core 14 ₂ of the cantilever type rotor 12 ₂ is formed by connecting the first iron core portion 17 and the second iron core portion 18 to each other by a connecting bolt 20 ₁ screwed to the engine shaft 13 _1. is there. Therefore, if the first, second, and third iron core plates 17a, 18a, and 19a are prepared in advance, it is possible to support both the both-end support type rotor 12 ₁ and the cantilever support type rotor 12 _2. it can. Further, when the axial thickness of the iron cores 14 ₁ and 14 ₂ is changed, the first iron core plate 1 forming the first iron core part 17
7a ..., or the third of the third core portions 19
This can be dealt with by changing the number of iron core plates 19a .... Therefore, a plurality of types of rotor shafts, which have been required in the past, are not required, and the number of parts can be reduced.

If the inner diameter of the fitting hole 22 and the inner diameter of the support hole 24 are set to be the same, it is possible to stack the first iron core plates 17a to form the third iron core portion.

FIGS. 6 and 7 show a second embodiment of the present invention. FIG. 6 is a vertical sectional view of a double-sided support type rotor, and FIG. 7 is a vertical sectional view of a single-sided support type rotor. Therefore, the same reference numerals are attached to the portions corresponding to the first embodiment.

First, referring to FIG. 6, the engine shaft 13
₂ is shorter than the engine shaft 13 ₁ of the first embodiment, and a tapered fitting portion 32 is provided at the end of the engine shaft 13 ₂ . On the other hand, the fitting portion 32 is fitted to the outer end of the cylindrical connecting shaft 33 which is rotatably penetrated through the first bracket 7 (see FIG. 1) and is inserted into the housing 5 (see FIG. 1). A tapered fitting recess 34 is provided for mating. Thus the first, second and third
The connecting shaft 3 is inserted through the key 27 into the fitting hole 22 in the iron core 14 _{1 formed} by overlapping the iron core parts 17, 18, and 19.
3, the inner end portion of 3 is fitted, the locking head portion 20a is engaged with the locking flange portion 28c of the holder 28, and the insertion hole 23 and the connecting shaft 3 are formed.
The connecting bolt 20 ₂ inserted through the engine shaft 1
By being screwed into 3 ₂ , a double-supported type rotor 12 ₁ ′ is constructed.

When constructing the cantilever type rotor 12 ₂ ′, the third iron core portion 19 may be omitted from the rotor 12 ₁ ′ as shown in FIG.

Also according to the second embodiment, by preparing the first, second and third iron core plates 17a, 18a and 19a in advance, the double-support type rotor 12 ₁ ′,
In addition, it is possible to deal with any of the cantilever type rotors 12 ₂ ′, and it is possible to easily deal with the change in the axial thickness of the iron cores 14 ₁ and 14 ₂ and to reduce the number of parts. Can contribute.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various small design changes can be made without departing from the present invention described in the claims. It is possible to

[0027]

As described above, according to the invention described in claim 1, the iron core is formed by laminating a plurality of first iron core plates, and the fitting hole having the key groove on the inner surface is formed in the central portion. A first iron core part, and a second iron core part that is formed by stacking a plurality of second iron core plates and has an insertion hole that is continuous with the fitting hole and that is overlapped with the first iron core part on the second bracket side. An end portion of the engine shaft that rotatably penetrates the first bracket is fitted into the fitting hole in a state where relative rotation is blocked by the key engaged with the key groove, and on the second bracket side. Since the connecting bolt that has the locking head portion that is engaged with the second iron core portion and that is inserted into the insertion hole is screwed into the engine shaft,
It is possible to eliminate the need for a rotor shaft, which has been conventionally required, and it is possible to easily cope with a change in the axial thickness of the iron core, which can contribute to a reduction in the number of parts.

According to the second aspect of the invention, the iron core is formed by laminating a plurality of first iron core plates, and the first iron core portion is formed with a fitting hole having a key groove on the inner surface at the center thereof. And a second iron core portion that is formed by stacking a plurality of second iron core plates and has an insertion hole that is continuous with the fitting hole and that is overlapped with the first iron core portion on the second bracket side. The end of the engine shaft is fitted to the outer end of the connecting shaft that is rotatably passed through the bracket and inserted into the housing, and the inner end of the connecting shaft is opposed by a key that engages with the key groove. The connecting bolt, which is fitted in the fitting hole in a state where rotation is blocked and has a locking head part that is engaged with the second iron core part on the second bracket side, is inserted into the insertion hole and the connecting shaft. Since it is screwed onto the shaft, it was necessary before even when the engine shaft was short. To allow the rotor connecting of the engine shaft to Tashafuto as unnecessary, as easily cope with the changes in the axial direction thickness of the core, which can contribute to reducing the number of parts.

Further, according to the invention of claim 3, in addition to the constitution of the invention of claim 1 or 2, the iron core is
The first and second iron core portions are laminated with a plurality of third iron core plates, and a supporting hole having a diameter larger than that of the insertion hole is provided in the central portion so that the second iron core portion is superposed on the second bracket side. And a third iron core portion, the cylinder being fitted to the support hole on the second bracket side of the third iron core portion with a bearing interposed between the third iron core portion and a support protrusion provided on the second bracket. It is possible to accommodate a two-end support type rotor, since the holder with the parts is superposed and the locking head of the connecting bolt is engaged with the holder.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional side view of a generator having a double-support type rotor according to a first embodiment.

FIG. 2 is a front view of the first iron core plate as seen from the direction of arrow 2-2 in FIG.

FIG. 3 is a front view of a second iron core plate as viewed in the direction of arrows 3-3 in FIG.

FIG. 4 is a front view of a third iron core plate as viewed in the direction of arrows 4-4 in FIG.

FIG. 5 is a vertical sectional view of a cantilever type rotor.

FIG. 6 shows a second embodiment and is a vertical cross-sectional view of a double-support type rotor.

FIG. 7 is a vertical sectional view of a cantilever type rotor.

[Explanation of symbols]

5 ... Housing 7 ... First bracket 8 ... Second bracket 12 ₁ , 12 ₁ ′, 12 ₂ , 12 ₂ ′ ... Rotor 13 ₁ , 13 ₂ ... Engine shaft 14 ₁ , 14 ₂ ... Iron core 16 ... Coil 17 ... 1st iron core part 17a ... 1st iron core plate 18 ... 2nd iron core part 18a ... 2nd iron core plate 19 ... 3rd iron core part 19a ... third core plate 20 _1, 20 ₂ ... connecting bolts 20a ... locking head 21 ... key groove 22 ... fitting hole 23 ... insertion hole 24 ... support Hole 27 ... Key 28 ... Holder 28b ... Cylindrical part 29 ... Support protrusion 30 ... Needle bearing as bearing 33 ... Connection shaft

Claims (3)

[Claims] 1. A core (14 ₁ , 1) in a housing (5) having first and second brackets (7, 8) at both ends.
4 ₂₎ formed by mounting a coil (16) is a rotor (12
In _1, 12 ₂₎ is rotatably accommodated, said rotor (12 _1, 12 ₂₎ to the engine shaft (13 ₁₎ generator is connected by a first bracket (7) side, the core (14 _1, 14 ₂ ) is a plurality of first iron core plates (17a)
And a first core portion (1) in which a fitting hole (22) having a key groove (21) on the inner surface is formed in the center portion.
7) and a plurality of second iron core plates (18a) are laminated, and an insertion hole (23) continuous with the fitting hole (22).
And has a first iron core part (17) on the second bracket (8) side.
And an engine shaft (1) that rotatably penetrates the first bracket (7).
The fitting hole (22) with the end of 3 ₁ ) being prevented from relative rotation by the key (27) engaged with the key groove (21).
To the second core (1) on the side of the second bracket (8).
A connecting bolt (20 ₁ ) having a locking head (20a) engaged with 8) and inserted through an insertion hole (23) is screwed onto an engine shaft (13 ₁ ). Generator. 2. An iron core (14 ₁ , 1) in a housing (5) having first and second brackets (7, 8) at both ends.
4 ₂₎ formed by mounting a coil (16) is a rotor (12
₁ ′, 12 ₂ ′) is rotatably accommodated, and an engine shaft (13 ₂ ) is connected to the rotor (12 ₁ ′, 12 ₂ ′) on the first bracket (7) side,
The iron cores (14 ₁ , 14 ₂ ) are composed of a plurality of first iron core plates (17
a) a plurality of second iron core plates (18a) and a first iron core portion (17) formed by stacking a) and having a fitting hole (22) having a key groove (21) on the inner surface in the center thereof. Insertion holes (2) that are laminated and continuous with the fitting hole (22)
3) has a first iron core part (1) on the second bracket (8) side.
7) and a second iron core portion (18) superposed on the first core bracket (7) so as to rotatably penetrate the first bracket (7) and the housing (5).
The end of the engine shaft (13 ₂ ) is fitted to the outer end of the connecting shaft (33) inserted therein, and the inner end of the connecting shaft (33) is engaged with the key groove (21). Key (27)
Has a locking head (20a) that is fitted into the fitting hole (22) in a state where relative rotation is blocked by and is engaged with the second iron core (18) on the second bracket (8) side. Bolt (20 ₂ ) that is inserted through the through hole (23) and the connecting shaft (33)
The generator is screwed to the engine shaft (13 ₂ ). 3. The iron core (14 ₁ ) is formed by laminating first and second iron core parts (17, 18) and a plurality of third iron core plates (19a), and is more than the insertion hole (23). A third core portion (19) having a large-diameter support hole (24) in the center portion and overlapping with the second core portion (18) on the second bracket (8) side; On the side of the second bracket (8) of (19), a bearing (30) is interposed between the support protrusion (29) provided on the second bracket (8) and fitted into the support hole (24). polymerized holder (28) having a cylindrical portion (28b) which is, connection bolts (20 _1, 20
Generator according to claim 1 or 2, characterized in that the locking head (20a) of ₂ ) is engaged with the holder (28).