KR19980080780A - Rotor of magnet generator - Google Patents

Abstract

The rotor 21 of the magnet generator of the present invention connects the clutch outer 33 of the one-way clutch 30 to the bottom wall of the yoke 22. The clutch outer includes a main body 34 in which a mounting hole 35 fitting the clutch inner 31 is opened, a clutch chamber 40 immersed in the inner circumference of the mounting hole 35 of the main body 34, and a clutch chamber 40. The clutch roller 43 accommodated in () is provided. The closed wall 40a on the yoke bottom wall side of the clutch chamber 40 is immersed in cold forging, and the socket portion 36A is laid on the yoke bottom wall side end surface of the main body 34 so as to make the closed wall 40a thin. The spigot portion 36B of the boss member 24 fixed to the yoke 22 is coupled to the socket portion 36A. The front end of the clutch inner 31 is disposed between the end face of the blocking wall 40a and the bottom of the socket portion 36A at the inner circumference of the blocking wall 40a.

Description

Rotor of magnet generator

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotor of a magnet generator, and more particularly, to an improvement in the coupling structure between a yoke and a clutch outer of a one-way clutch, and is effective for use in a magnet generator that is linked to an engine such as a two-wheeled vehicle. It is about the former.

Generally, in an engine configured to be started by a start motor among two-wheeled engines, the one-way clutch between the crankshaft of the engine and the start motor is required because the start motor needs to be disconnected from the engine after starting. ) Is established. On the other hand, a magnet generator is often directly connected to the flange shaft of an engine such as a two-wheeled vehicle. However, a structure in which a one-way clutch is inserted into a magnet generator for connecting and releasing the start motor and the engine is widely adopted. Therefore, in the structure in which the one-way clutch is inserted into the magnet generator directly connected to the crankshaft of the engine, the clutch outer is fixed concentrically to the boss member of the rotor of the magnet generator, and the clutch inner fitted to the clutch outer ( There is a structure in which the sprocket shaft which is connected to the start motor is fixed to the cluch inner.

As a rotor of a conventional magnet generator of this kind, there is a one disclosed in, for example, Japanese Patent Application Laid-Open No. 62-177929. That is, in this case, a one-way clutch in which a part of the boss member having a flange on the outer circumference is inserted into an opening formed in the bottom wall of the wedge-shaped yoke, and at the same time, the clutch inner and the clutch outer are arranged concentrically in and out of the yoke bottom wall. Clutch outer is connected coaxially. The clutch outer includes a main body having a clutch inner mounting hole fitted with a clutch inner, and a plurality of clutch threads and wedges which are recessed in a radial direction arranged at intervals in the circumferential direction on the inner circumferential surface of the clutch inner mounting hole. A clutch roller is provided as a plurality of clutch members rotatably housed in the clutch chamber to connect and release the clutch inner and the clutch outer.

In the rotor of the magnet generator described above, since both end surfaces in the axial direction are opened in the clutch chamber of the clutch outer, a plate for securing the slidability of the clutch roller or receiving a force from the clutch roller is provided with the clutch roller. It is necessary to establish between the end face of the flange of the boss member, and there is a problem that the manufacturing cost of the rotor of the one-way clutch or the magnet generator is increased. When the plate is omitted and the clutch roller is received by the end face of the flange of the boss member, it is necessary to grind the end face of the flange of the boss member with high accuracy, thereby increasing the manufacturing cost of the rotor of the magnet generator.

In addition, in the one-way clutch described above, in order to avoid contact of the clutch inner with the end face of the boss member opposite to the front end, the front end is positioned on the inner circumference of the clutch chamber of the clutch outer, and the engine portion (surface) Since the mounting) interferes with the outer surface of the clutch roller, there is a possibility that the clutch roller will be burned or unevenly worn and the performance of the one-way clutch will be degraded.

An object of the present invention is to provide a rotor of a magnet generator capable of increasing the performance of the one-way clutch and reducing the manufacturing cost.

1 shows a rotor of a magnet generator according to one embodiment of the present invention, (a) is a partially cutaway sectional view, and (b) is a sectional view taken along the line b-b of (a).

2 is a front sectional view showing an assembled state of the magnet generator with the start motor.

Fig. 3 is an explanatory view for explaining the operation, (a) is a sectional view showing the clutch outer after cold forging, (b) is a sectional view showing the clutch outer after cutting, and (c) is a mounting part of the main part A partial cutaway front view showing a.

4 is an explanatory view for explaining the same operation, (a) is a cross-sectional view when the clutch inner end is located between the inner end surface of the occluded chamber wall and the bottom of the socket, (b) is a case where the relief portion is immersed in the spigot portion It is sectional drawing which shows.

* Explanation of symbols for main parts of drawings *

10: engine, 11: side wall, 12: crankshaft, 13: engine cover, 14: airtight chamber, 15: start motor, 16: output shaft, 17: drive side sprocket, 18: driven side sprocket, 19: chain, 20: Magnet generator, 21: rotor, 22: yoke, 23: magnet, 24: boss member, 25: generator, 30: one-way clutch, 31: clutch inner, 32: bearing, 33: clutch outer, 34: main body , 35: clutch inner mounting hole, 36A: socket, 36B: spigot, 37: positioning hole, 39: bolt, 40: clutch chamber, 40a: closed wall, 41: small diameter part, 42: large diameter part, 43: clutch Laura, 44: through hole, 45: spring receiving hole, 46: accommodating part, 47: spring, 48: spring cap, 49: spring cover, 50: recess, 51: plate

In the rotor of the magnet generator according to the present invention, a part of the boss member having a flange on the outer circumference is inserted into an opening formed in the bottom wall of the bowl-shaped yoke, and at the same time, the clutch inner and the clutch outer are centered on the inner wall of the yoke. The clutch outer of the one-way clutch disposed in a circle is coaxially connected, and the clutch outer is a main body having a clutch inner mounting hole fitted with the clutch inner and an inner circumferential surface of the clutch inner mounting hole. A plurality of clutch chambers disposed at intervals in the circumferential direction and rotatably disposed in a wedge shape in a radially outward direction, and rotatably housed in each of the clutch chambers to connect and release the clutch inner and the clutch outer. In the rotor of the magnet generator having a member,

Each of the clutch chambers is formed in an element in which one end surface in the axial direction is closed and the other end surface is opened, and each clutch chamber includes a closing chamber constituting the closed end face at the bottom wall side of the yoke. In the main body of the clutch outer, a socket part is pushed to thin a part of the blocking wall of each clutch chamber, and at the same time, the socket part is spigot of the flange. It is characterized in that the spike portion is socket-spigot coupled.

The front end surface of the clutch inner is preferably disposed between the closed end surface and the end face of the socket portion in the inner circumference of the closure chamber in the main body of the clutch outer.

According to the above means, since the clutch outer is integrally formed including the clutch chamber, the manufacturing cost of the clutch outer is greatly reduced. Furthermore, since the cross section of the clutch roller is accommodated with good slidability by the cross section of the closed wall of the integrally molded clutch chamber, the performance of the one-way clutch roller is improved. Here, in order to integrally mold, the closed wall of the clutch chamber needs to have a thickness greater than or equal to a predetermined value, and since the socket portion can be molded after being integrally molded on the cross section opposite to the clutch chamber of the closed chamber, In the case of molding, the closed chamber of the clutch chamber can secure a thickness of more than a predetermined value. In addition, since the spigot portion is coupled to the socket-spigot in the flange of the boss member in the socket portion, the total length of the rotor of the magnet generator is shortened.

In addition, by disposing the front end of the clutch inner in the main body of the clutch outer between the closed end surface of the closed chamber and the end face of the socket part, the edge portion of the front end surface of the clutch inner is prevented from interfering with the outer circumference of the clutch member. Since it is possible, it is possible to prevent the occurrence of marks and uneven wear in the clutch member, thereby improving the performance of the one-way clutch.

1 shows a rotor of a magnet generator according to one embodiment of the present invention, (a) is a partially cutaway side view, and (b) is a sectional view taken along the line b-b of (a). 2 is a front sectional view showing an assembled state of the magnet generator with the start motor. 3 is an explanatory diagram for explaining the operation thereof.

In this embodiment, the rotor of the magnet generator according to the present invention, in a two-wheeled vehicle with a start motor, is configured as a rotor of the magnet generator directly connected to the engine, and the one-way clutch for connecting the magnet generator to the start motor is integrated. It is joined by. That is, the one-way clutch 30 has a clutch inner 31 and a clutch outer 33 arranged concentrically in and out, and the start inner 31 is interlocked with the start motor side and the clutch outer 33 side. It is directly connected to this magnet generator side.

As shown in FIG. 2, the rotor 21 of the magnet generator 20 is directly connected to the protruding end of the crankshaft 12 protruding outward from the side wall 11 of the engine 10 and at the same time the crankshaft ( In the intermediate portion of 12), the clutch inner 31 of the one-way clutch 30 is supported by a rotating material via a bearing 32 that rolls. An engine cover 13 is fixed to the side wall 11 of the engine 10, and a sealed chamber 14 is formed inside the engine cover 13. The output shaft 16 of the start motor 15 is inserted into the hermetic chamber 14, and the drive side sprocket 17 is fixed to the output shaft 16. The drive shaft sprocket 17 is linked to the driven side sprocket 18 fixed to the clutch inner 31 by a chain 19.

The rotor 21 of the magnet generator 20 has a yoke 22 formed in a short cylindrical shape having a bottom wall, and a plurality of magnets 23 forming a magnetic field magnetic pole are formed on the inner circumferential surface of the yoke 22 and the main direction thereof is provided. It is fixed at intervals. The boss member 24 is concentrically arranged and fixed to the bottom wall of the yoke 22, and the boss member 24 is fastened by a nut on the taper coupling and key coupling to the crankshaft 12 of the engine 10. have. A generator 25 is disposed inside the yoke 22, and the generator 25 is supported by an engine cover 13 fixed to the side chamber 11 of the engine 10.

The clutch outer 33 of the one-way clutch 30 includes a main body 34 of a short cylindrical shape (approximately donut-shaped), and the main body 34 of the clutch outer 33 includes a clutch seal to be described later. It is a structure integrally molded as described later by cold forging, which is an example of plastic processing in the integral molding method. The clutch inner portion 31 supported by the crankshaft 12 as a rotating material is inserted into the clutch inner mounting hole 35 by the cylindrical hollow portion of the main body 34.

At the yoke-side end of the clutch inner attachment hole 35 of the main body 34, the socket portion 36A formed concentrically and formed into a circular blood shape of a predetermined depth is integrally immersed.

The socket portion 36A is laid as described below by cutting after the main body 34 of the clutch outer 33 is cold forged including the clutch chamber. The socket portion 36A is socket-spigot-coupled to the spigot portion 36B formed on the outer circumference of the yoke bottom wall outer end portion of the boss member 24. This socket-spigot coupling ensures alignment between the clutch outer 33 and the rotor 21. The positioning pin 37 is press-fitted in the axial direction at an arbitrary position in the main direction of the main body 34, and the positioning pin 37 is inserted into the positioning hole 38 formed in the bottom wall of the yoke 22. By fitting, the circumferential positioning of the rotor 21 and the clutch outer 33 is secured. The main body 34 is fastened by a plurality of bolts 39 to the bottom wall of the yoke 22 on the socket-spigot coupling to the boss member 24 of the rotor 21 of the magnet generator 20.

On the inner circumferential surface of the clutch inner mounting hole 35, an end portion on the side opposite to the socket 36A is closed in the axial direction, and the end surface on the yoke bottom wall is closed, and the cross section on the opposite side is open. Wedge-shaped clutch chambers 40 are arranged at equal intervals in three circumferential directions and are squeezed outward in the radial direction. In each clutch chamber 40, clutch rollers 43 as clutch limbs are rotatably rotated in the circumferential direction, respectively. It is stored. In the circumferential direction of the clutch chamber 40, the wedge shape is formed by integrating the small diameter portion 41 and the large diameter portion 42 which are different in distance from the center of the clutch inner mounting hole 35, and the clutch roller 43 ) Is in the state of being located in the small diameter portion 41, the wedge effect is exerted between the clutch inner 31. The clutch chamber 40 is an element which was integrally dipped as described later by cold forging which is an example of plastic processing including the blocking wall 40a constituting the closed end.

In the main body 34, a through hole 44 is connected to the clutch chamber 40 from the outer circumferential surface of the main body 34 at a portion adjacent to the small diameter portion 41 of the clutch chamber 40. It is established to penetrate in the direction. In the main body 34, a spring receiving hole 45 is formed on an extension line of the shaft center of the through hole 44 at a portion adjacent to the large diameter portion 42 of the clutch chamber 40. As shown in FIG. The spring receiving hole 45 is constituted by a blind hole penetrated through the through hole 44 on the extension line of the through hole 44, and receives a reaction force of the spring 47 by the bottom of the hole. 46 is comprised. A spring 47 is inserted into the spring receiving hole 45 from the clutch chamber 40, and the insertion end serving as the reaction force end of the spring 47 has a receiving portion 46 formed by the bottom of the hole of the spring receiving hole 45. ) Is in a state accommodated by. The urging side end of the spring 47 is covered with a spring cap 48 formed in a user cylindrical shape, and the spring 47 is always inserted into contact with the clutch roller 43 through the closed end wall of the spring cap 48. It is in a state. That is, the spring 47 applies a reaction force directly to the receiving portion 46 at the bottom of the hole of the spring receiving hole 45, and thus the main body 34 so that the elastic force is applied to the large diameter portion of the clutch chamber 40 with respect to the clutch roller. It is always urged toward the small diameter part 41 side from the 42) side.

The outer side of the main body 34 is covered with the clutch cover 49 so as to cover the whole surface from the outer periphery to the side opposite to the yoke 22, and the end of the clutch cover 49 on the yoke 22 side is the main body 34. It is processed so that the outer periphery of the side of the yoke 22 of the side may be cocked. In the outer peripheral surface of the main body 34 of each clutch chamber 40 and each through hole 44, the opening is closed by the clutch cover 49. As shown in FIG. Therefore, the opening side end surface of the clutch roller 43 rotatably accommodated in each clutch chamber 40 is accommodated by sliding material by the inner end surface of the clutch roller 49. A cross section opposite to the clutch cover 49 of the clutch roller 43 is in a state of being accommodated by sliding material by the inner end surface in the blocking wall 40a of the clutch chamber 40.

In the rotor of the magnet generator according to the above configuration, in the clutch outer 33, the main body 34, the clutch mounting hole 35, the clutch chamber 40 and the closed wall 40a of the clutch chamber 40. Is formed integrally by cold forging as shown in Fig. 3 (a). That is, the short cylindrical body which presets the thickness of the main body 34, the outer diameter, the inner diameter of the clutch inner mounting hole 35, and the volume of each clutch chamber 40, and the volume of the whole is mainly the thickness direction (axial direction). Cold forging step by step in the clutch chamber 40, the wedge shape and the closing wall (40a) by the small diameter portion 41 and the large diameter portion 42 is the main body 34 and the clutch inner mounting hole 35 It is molded together with).

The manufacturing cost of the clutch outer 33 can be greatly reduced by integrally forming the main body 34 of the clutch outer 33 including the clutch chamber 40 by cold forging. That is, the side wall surface of the small diameter part 41 and the large diameter part 42 which comprise the wedge shape of the clutch chamber 40 needs to be formed in a complicated curved surface (so-called cam profile). For this purpose, the clutch chamber 40 is conventionally formed by broaching by the broaching machine. Since the broaching is only cutting work with low workability and the blotting machine becomes large diameter, when the main body 34 of the clutch outer 33 is integrally formed by cold forging including the clutch chamber 40, Once the mold is provided, it is possible to mass-produce to a high degree by the press apparatus, so that the manufacturing cost of the clutch outer 33 can be kept low.

In addition, by cold forging, a closed wall 40a that closes one end surface in the axial direction of the clutch chamber 40 by cold forging is formed at the same time as a clutch value accommodated in the clutch chamber 40. Since one end surface of the la 43 can be accommodated by the occlusion chamber 40a, it is possible to omit a dedicated plate for accommodating the end face of the clutch roller 43, and as such, It is possible to further suppress the forging cost, and furthermore, since the surface of the closed wall 40a forged by cold forging becomes hard and smooth, the clutch roller 43 can be slidably accommodated by the colored wall 40a. This is possible, and as a result, the effect that the performance of the one-way clutch 30 becomes high is obtained.

However, in the case of forming the closed wall 40a of the clutch chamber 40 by cold forging, it has been found that in cold forging, it is necessary to set the thickness of the closed wall 40a more than a predetermined value. Thus, in the present embodiment, as shown in Fig. 3A, the thickness t of the closing wall 40a of the clutch chamber 40 after cold forging is set to a predetermined value (for example, 6.2 mm) required for cold forging. have.

By the way, when the closed wall 40a of the clutch chamber 40 is formed by cold forging, for example, as shown to a comparative example in FIG.3 (c), the closed wall at the side of the semi-yoke of the clutch chamber 40 is shown. It is contemplated to install 40a. When the clutch outer 33 is inserted into the rotor of the magnet generator in a state where the thickness of the blocking wall 40a of the clutch chamber 40 is thick, the clutch inner 31 is provided. The clutch outer 33 interferes with the driven sprocket 18 which is fixed to the driven side. As a result, the distance L between the outer surface of the obstruction wall 40a of the clutch outer 33 and the driven side sprocket 18 becomes very narrow and becomes "0". Therefore, when the blocking wall 40a of the clutch outer 33 and the driven side sprocket 18 are configured to face each other with a large distance M, it is necessary to cut the outer surface of the blocking wall 40a with a large cutting margin S. . Therefore, the manufacturing cost of the rotor of the clutch outer 33 and the magnet generator increases. In addition, the plate 51 is required to accommodate the cross section of the yoke 22 side of the clutch roller 43 with good slidability, and the manufacturing cost increases.

In the present embodiment, however, the closing wall 40a is disposed on the yoke side of the clutch chamber 40, and the main body 34 of the clutch outer 33 is cold including the clutch chamber 40 and the closing wall 40a. After the forging, in the main body 34 of the clutch outer 33 as shown in Fig. 3 (b), the socket inner mounting hole 35 is provided with the socket portion 36A on the end wall on the side of the closing wall 40a. Interference with the driven side sprocket 18 of the clutch outer 33 is avoided by squeezing by cutting processing concentrically with the. That is, in the rotor of the magnet generator 20, the spigot portion 36B of the boss member 24 is coupled to the socket portion 36A of the clutch outer 33 by the socket-spigot coupling 33 ) Is close to the yoke 22 side, and it is possible to avoid the interference on the driven sprocket 18 of the clutch outer 33.

As described above, in the present embodiment, since the relief portion is configured as a socket for avoiding interference, the process does not increase to form a relief portion for avoiding interference. Therefore, an increase in the manufacturing cost of the clutch outer 33 can be avoided. The main body 34 of the clutch outer 33 after the cold forging of the clutch outer 33 is, of course, a mounting hole for the positioning pin 37, a fastening hole for the bolt 39, a through hole 44 and a spring. The accommodation hole 45 is opened by cutting.

In addition, the yoke 22 side of the clutch chamber 40 of the clutch outer 31 is connected to the end face of the boss member or the plate 51 covering the same as the conventional example and the comparative example shown in Fig. 3 (c). In this disclosure, since the engine portion (chamfering portion) interferes with the outer circumferential surface of the clutch roller 43, marks and uneven wear occur on the clutch roller 43, and the performance of the one-way clutch 30 is deteriorated. There is a possibility.

However, in this embodiment, since there is a closing wall 40a between the end face of the boss member 24 and the clutch chamber 40, the front end surface of the clutch inner 31 as shown in detail in FIG. In the main body 34 of the clutch outer 33, the magnet generator 20 is positioned between the inner end surface of the closure wall 40a and the bottom face of the socket portion 36A during the inner circumference of the closure wall 40a. It is possible to set the relationship between the rotor 21 and the clutch inner 31. Because of this configuration, it is possible to avoid the engine portion of the front end face of the clutch inner 31 from interfering with the outer circumference of the clutch roller 43, so that it is possible to prevent the occurrence of marks and uneven wear in the clutch roller 43. In addition, it is possible to prevent the performance of the one-way clutch 30 from deteriorating.

In addition, in order to avoid the engine portion of the front end face of the clutch inner 31 from interfering with the outer circumference of the clutch roller 43, the clutch inner 31 is disposed in the inner circumference of the closing chamber 40a as shown in FIG. As shown in Fig. 4 (b), a configuration is proposed in which recesses 50 are recessed inside the spigot portion 36B of the boss member 24 to arrange the tip of the clutch inner 31 therein. . According to this configuration, however, the recess 50 needs to be immersed in the boss member 24, so that the manufacturing cost of the rotor of the boss member 24 and the magnet generator is increased as compared with the case of Fig. 4A. .

In addition, this invention is not limited to the said embodiment, Of course, various changes are possible in the range which does not deviate from the summary.

For example, the clutch outer is not limited to integrally forming by cold forging, and may be integrally formed by hot forging, casting, resin molding, or the like.

The clutch member is not limited to the clutch roller but may be a clutch ball or the like, and the mounting structure of the clutch spring is not limited to the above embodiment.

As described above, according to the present invention, it is possible to reduce the manufacturing cost of the rotor of the magnet generator while increasing the performance of the one-way clutch.

Claims (4)

A part of the boss member having a flange on the outer circumference is inserted into an opening formed in the bottom wall of the bowl-shaped yoke, and at the same time, a clutch inner and a clutch outer are formed on the inner wall of the yoke bottom wall. The clutch outer of the one-way clutch disposed in the main body is coaxially connected, and the clutch outer is formed on a main body having a clutch inner mounting hole fitted with the clutch inner and an inner circumferential surface of the clutch inner mounting hole. A plurality of clutch chambers arranged at intervals in the circumferential direction and wedge-shaped in a radially outward direction and rotatably housed in the respective clutch chambers to execute connection and release of the clutch inner and the clutch outer; In the rotor of the magnet generator having: Each of the clutch chambers is formed in an element in which one end surface in the axial direction is closed and the other end surface is opened, and each clutch chamber includes a closing chamber constituting the closed end face at the bottom wall side of the yoke. In the main body of the clutch outer, a socket portion is squeezed so as to thin a part of the closed wall of each of the clutch chambers on the bottom wall side end surface of the yoke. A rotor of a magnet generator, characterized in that a spigot portion of the flange is connected to a socket-spigot. The rotor of a magnet generator according to claim 1, wherein said clutch inner is arranged in an inner circumference of said closed wall in a main body of said clutch outer. The magnet generator assembly according to claim 2, wherein the distal end portion of the clutch inner is disposed between the closed end surface and the end face of the socket portion in the inner circumference of the closed wall. Electronic. 3. The rotor of claim 1 or 2, wherein the blocking wall is formed integrally with the clutch outer by cold forging of the clutch outer.