JP5138340B2 - Magnet generator with starter gear - Google Patents

Description

  The present invention relates to a magnet generator with a starter gear that is mounted on an engine such as a motorcycle, a buggy, or a snow vehicle and charges a battery and supplies power to an electric load.

  In a magnet generator having a rotor with a permanent magnet and a stator with a power generation coil, engine oil is injected into the stator to cool the stator in order to suppress heat generation of the power generation coil.

  For example, in FIG. 1 of Patent Document 1, a horizontal injection hole is provided in the bottom wall portion of the engine cover having a substantially U-shaped cross section, and an oil passage portion communicating with the injection hole is provided on the outer surface of the bottom wall portion. A configuration that suppresses heat generation of the stator by injecting engine oil from the hole to the side surface of the stator is disclosed.

Moreover, in FIG. 5 of the said patent document 1, while providing a horizontal injection hole in the bearing wall part of the engine case closed with an engine cover, the oil channel part connected to an injection hole is provided in the bearing wall part, A configuration is disclosed in which engine oil is injected from the injection hole onto the side surface of the stator to suppress heat generation of the stator.
Japanese Patent No. 3769168

  However, according to the prior art shown in FIG. 1, the processing for forming the oil passage portion in the engine cover is complicated, and the design of the oil passage portion is partially protruded from the engine cover. There is a problem of lowering.

  Further, in the prior art shown in FIG. 5, when this prior art is used as it is for a magnet generator with a starter gear, the engine oil injected from the injection hole is blocked by the starter gear and does not reach the side surface of the starter. There is a problem that it becomes difficult to suppress.

  The present invention has been made in view of the above-mentioned problems of the prior art, and in a magnet generator with a starter gear, it is easy to process and can suppress the heat generation of the stator without deteriorating the design. An object is to provide a magnet generator with a starter gear having a cooling means.

  In the magnet generator with a starter gear of the present invention, a stator, a hollow disc portion having a plurality of window hole portions of a rotor, a one-way clutch, and a starter gear are arranged in this order from the front end portion side to the center portion side of the crankshaft. The engine cover joint surface joined to the case joint surface is provided with a recess in the engine cover joint surface in the magnet generator with a starter gear located near the starter gear in the axial direction of the crankshaft. An injection hole communicating with the recess is provided, and the engine oil injected from the injection hole through the recess during the rotation of the rotor intermittently passes through the window hole and passes through the window hole. Configured to be sprayed in a space sandwiched between a surface facing the portion and a surface facing the stator of the hollow disc portion Characterized in that it is.

  According to the present invention, the engine oil injected from the injection hole portion intermittently passes through the window hole portion and reaches the stator side, so that heat generation of the stator can be suppressed. In addition, since the concave portion is provided on the engine cover joint surface, the concave portion can be formed by simple processing, and when the engine case is closed with the engine cover, the engine cover joint surface is joined to the engine case joint surface. Since the concave portion is not visible from the outside, the design property is not deteriorated. Further, the engine oil injected from the injection hole portion is easily atomized by intermittently passing through the window hole portion, and the opposing surface of the stator to the hollow disc portion and the opposing surface of the hollow disc portion to the stator. Since the space is cooled and the space is cooled, the effect of suppressing the heat generation of the stator is greater than when the engine oil is directly injected onto the side surface of the stator.

  A magnet generator with a starter gear according to the present invention is an engine cover having a substantially U-shaped cross section fixed to an engine case, and is substantially hollow extending substantially vertically from a bottom wall portion and a free end of the bottom wall portion. A cylindrical annular side wall portion, and an annular end surface of the annular side wall portion constitutes an engine cover joint surface joined to the engine case joint surface, with respect to a portion near the tip portion of the crankshaft and the engine cover. A rotatable starter gear, a rotor connected to the tip of the crankshaft, a substantially cylindrical boss fixed to the tip of the crankshaft, and the crank from the free end of the boss A hollow disc portion extending perpendicular to the axial direction of the shaft, a plurality of window hole portions formed in the hollow disc portion along the circumferential direction, and the crank from the outer peripheral free end of the hollow disc portion Shaft direction A rotor having a hollow cylindrical portion extending in parallel with the direction, a rotor having a permanent magnet disposed on an inner peripheral surface of the hollow cylindrical portion, and disposed between the starter gear and the hollow disc portion, A one-way clutch that transmits torque from the starter gear side to the rotor side and does not transmit torque from the rotor side to the starter gear side, the boss portion, the hollow disc portion, the hollow cylindrical portion, and the permanent magnet A generator with a starter gear, which is housed in an annular space formed by and fixed to a bottom wall portion of the engine cover, wherein a recess is provided on the joint surface of the engine cover, An injection hole portion communicating with the concave portion is provided in an inner peripheral portion of the annular side wall portion, and the engine is injected from the injection hole portion through the concave portion when the rotor rotates. Is formed by a surface facing the hollow disc portion of the stator intermittently, an outer peripheral surface of the boss portion, and a surface facing the stator of the hollow disc portion. It is characterized by being configured to be sprayed into an annular space.

  According to the present invention, the engine oil injected from the injection hole portion intermittently passes through the window hole portion and reaches the stator side, so that heat generation of the stator can be suppressed. In addition, since the concave portion is provided on the engine cover joint surface, the concave portion can be formed by simple processing, and when the engine case is closed with the engine cover, the engine cover joint surface is joined to the engine case joint surface. Since the concave portion is not visible from the outside, the design property is not deteriorated. Further, the engine oil injected from the injection hole portion is easily atomized by intermittently passing through the window hole portion, the surface facing the hollow disk portion of the stator, the outer peripheral surface of the boss portion, and the hollow disk portion. Since this annular space is cooled and diffused in the annular space sandwiched by the surface facing the stator, the effect of suppressing the heat generation of the stator is greater than when engine oil is directly injected onto the side surface of the stator.

  Here, the injection hole portion is located on the upper side in the vertical direction of the engine cover when the magnet generator with starter gear is used. By positioning the injection hole in this way, the injected engine oil can cool the entire side surface of the stator from the upper part to the lower part.

  Moreover, the said recessed part is a linear recessed part. Thus, when the concave portion is a linear concave portion, the setting range of the open end of the oil passage on the engine case side that can be in communication with the linear concave portion is expanded compared to the case where the concave portion is configured by a dotted concave portion, The engine cover can be applied to many types of engines.

  Moreover, the said injection hole part consists of one or two. When the number of injection holes is two, the stator can be uniformly cooled compared to the case where the number of injection holes is one. If the number of injection holes is set to 3 or more, an oil pump with a high injection pressure is required, the amount of engine oil used for cooling the stator increases, and the amount of engine oil used for original engine lubrication. Therefore, it is desirable that the number of injection holes is one or two.

  In addition, the stator has a connection portion that connects a lead wire to the outside and a lead wire of the power generation coil on a surface that does not face the hollow disc portion. If the connection part is provided on the surface on the side where the engine oil is injected, the connection part makes it difficult for the engine oil to reach the power generating coil and the stator is difficult to cool, but the engine oil is injected as described above. If the connection portion is not provided on the surface on the other side, the engine oil easily reaches the power generation coil, and the stator is easily cooled.

  Moreover, the said injection hole part consists of an oblique hole, and the said recessed part is comprised in the shape which accept | permits the penetration | invasion of a punch from the said recessed part side, and can pierce the said oblique hole. When the concave portion is configured in this way, the operation of opening the oblique holes becomes easy.

  The injection hole portion includes a grommet having an injection hole and a grommet holding hole for holding the grommet, and the grommet is compressed and deformed by a pressing force from the engine case joint surface to form the grommet holding hole. Contained and held. When the injection hole portion is constituted by the grommet and the grommet holding hole as described above, the injection hole including the oblique hole can be generated even when the oblique hole as described above cannot be drilled from the concave portion side. Further, the sealing performance is ensured by the compression deformation of the grommet.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 is a cross-sectional view of a magnet generator with a starter gear according to a first embodiment of the present invention, which is a cross-sectional view taken along the line II in FIG. 3, and FIG. 2 is a view of the stator when the stator is viewed from the connection side. 3 is a side view of the engine cover and the rotor when the starter gear and the one-way clutch are removed in FIG. 1 and viewed from the engine center side, and FIG. 4 is a cross-sectional view of the main part of the annular side wall portion of the engine cover. 5 is a cross-sectional view of a magnet generator with a starter gear according to the second and third embodiments of the present invention, which is a cross-sectional view taken along the VV line shown in FIG. 6 and the VV line shown in FIG. 7, and FIG. FIG. 6 is a side view of a rotor and an engine cover in a magnet generator with a starter gear according to a second embodiment when the starter gear and the one-way clutch are removed in FIG. 5 and viewed from the engine center side. 7 is a side view of a rotor and an engine cover in a magnet generator with a starter gear according to a third embodiment of the present invention, and is a side view when the starter gear and the one-way clutch are removed in FIG. 5 and viewed from the engine center side. 8 is a sectional view of a magnet generator with a starter gear according to a fourth embodiment of the present invention, which is a sectional view taken along line VIII-VIII in FIG. 9, and FIG. 9 is according to the fourth embodiment of the present invention. FIG. 9 is a side view of a rotor and an engine cover in a magnet generator with a starter gear, FIG. 8 is a side view when the starter gear and the one-way clutch are removed and viewed from the engine center side, and FIG. FIG. 11 is a graph showing the results of a stator temperature measurement experiment.

  1 to 4, a magnet generator 100 with a starter gear according to the first embodiment includes an engine cover 1 that covers a main body of the magnet generator 100 and a rotor 2 that is connected to a tip portion 300 a of an engine crankshaft 300. A stator 3 fixed to the engine cover 1, a starter gear 4 connected to a starter motor (not shown) via a planetary gear (not shown), and the rotor 2 and the starter gear 4. And a one-way clutch 5 provided.

  The engine cover 1 is formed in a substantially U-shaped cross section, and has a bottom wall portion 1a and an annular side wall portion 1b extending from the free end of the bottom wall portion 1a substantially perpendicular to the axial direction of the crankshaft 300. An annular end surface 1c of the annular side wall portion 1b constitutes an engine cover joint surface joined to the engine case joint surface 200a. A seal plate 6 is disposed between the engine case joint surface 200a and the engine cover joint surface 1c. As shown in FIG. 1, the engine cover joint surface 1 c is located closer to the starter gear 4 in the axial direction of the crankshaft 300.

  The engine cover joint surface 1c is provided with a recess 1d. The recess 1d communicates with an oil passage 200b formed in the engine case 200. The oil passage 200b of the engine case 200 communicates with an engine oil oil pump (not shown).

  Further, an injection hole portion 1e communicating with the recess 1d is provided on the inner peripheral portion of the annular side wall portion 1b of the engine cover 1. The injection hole portion 1e is an oblique hole. The direction of the oblique hole 1e is set in a direction toward the window hole 2d of the hollow disk portion 2c of the rotating member 2a described later, as indicated by an arrow in FIG. As shown in FIG. 4, the concave portion 1 d is configured to have a shape that allows the drilling tool (drill) 7 to enter from the concave portion 1 d side and allows the oblique hole 1 e to be drilled. The injection hole 1e is located on the upper side in the vertical direction of the engine cover 1 when the magnet generator 100 with starter gear is used (corresponding to the state shown in FIG. 3).

  The rotor 2 includes a rotating member 2a made of a magnetic material.

  The rotating member 2 a includes a substantially cylindrical boss portion 2 b that is fixed to the tip end portion 300 a of the crankshaft 300 by a bolt 8. At the free end of the boss portion 2b, a hollow disc portion 2c extends perpendicular to the axial direction of the crankshaft 300. A plurality of window hole portions 2d for cooling are formed in the hollow disc portion 2c along the circumferential direction. A hollow cylindrical portion (yoke) 2e extends parallel to the axial direction of the crankshaft 300 at the outer peripheral free end of the hollow disc portion 2c.

  On the inner peripheral surface of the hollow cylindrical portion 2e, a ring-shaped spacer 2f made of a non-magnetic material and a plurality of permanent magnets (rare earth magnets) 2g arranged in an annular shape at equal intervals are arranged in the axial direction of the crankshaft 300. It is arranged along. The rare earth magnet 2g is fixed to the inner peripheral surface of the hollow cylindrical portion 2e by a magnet protection ring 2h. The magnet protection ring 2h is disposed inside the rare earth magnet 2g, and is fixed to the hollow cylindrical portion 2e by winding and crimping the tip portion 2i of the hollow cylindrical portion 2e. The magnet protection ring 2h is formed by pressing a stainless steel plate.

  The stator 3 is fixed to the engine cover 1 and accommodated in an annular recess 2j of the rotating member 2a, that is, an annular space 2j formed by a boss portion 2b, a hollow disc portion 2c, a hollow cylindrical portion 2e, a permanent magnet 2g, and the like. Is done.

  The stator 3 includes a laminated core 3a. The laminated core 3a is configured by laminating a plurality of core sheets 3b obtained by pressing electromagnetic steel sheets. Core end plates 3c that are thicker than the core sheet 3b are disposed on both end surfaces (side surfaces) of the laminated core 3a. The laminated core 3a and the two core end plates 3c are integrated by caulking with rivets 3d. The laminated core 3a and the two core end plates 3c are insulated by a powder resin coating layer 3e made of epoxy resin, and a power generation coil 3f is formed by winding a copper wire around the powder resin coating layer 3e. . The lead wire of the power generation coil 3f and the lead wire to the outside are connected to form a connection portion 3g. The connection part 3g is insulated by the protective tube 3h. The protective tube 3h is held by a clip 3i. The clip 3i is fixed to the laminated core 3a side with a fastening screw 3j. The stator 3 is inserted into the engine cover 1 by passing a tightening bolt 9 through a screw insertion through hole 3k formed in the laminated core 3a and screwing it into a screw hole 1f formed to protrude from the bottom wall portion 1a of the engine cover 1. Fixed.

  The starter gear 4 is rotatably disposed via a bearing 12 with respect to a portion 300b of the crankshaft 300 near the tip portion 300a.

  The one-way clutch 5 has an outer portion 5a fixed to the hollow disc portion 2c of the rotating member 2a with a clutch bolt 10. The one-way clutch 5 is configured to transmit torque from the starter gear 4 side to the rotor 2 side and not to transmit torque from the rotor 2 side to the starter gear 4 side. When starting the engine, the torque of the starter gear 4 is transmitted to the rotor 2. Is transmitted to the crankshaft 300, and after starting the engine, a slip is generated between the one-way clutch 5 and the starter gear 4, and the starter gear 4 is not rotated.

  In the magnet generator 100 with the starter gear configured as described above, after the engine is started, the rotating member 2a of the rotor 2 is rotated by the rotation of the crankshaft 300, and a voltage is generated in the power generating coil 3f of the stator 3.

  Further, during the operation of the oil pump, engine oil is injected from the injection hole 1e toward the hollow disc portion 2c of the rotating member 2a. Since the rotating member 2a is rotating, the engine oil injected from the injection hole 1e alternately repeats the collision of the hollow disk 2c with the plate and the passage through the window 2d. In other words, the injected engine oil intermittently passes through the window hole 2d. For this reason, the engine oil is easily atomized, and the annular space 11 formed by the opposing surface 2k of the boss 2b and the stator 3 of the hollow disc 2c and the opposing surface 3l of the hollow disc 2c of the stator 3 is formed. To spread. The annular space 11 is cooled by the atomized engine oil, and the heat generation of the stator 3 is suppressed. Further, since the engine oil that has reached the lower inner peripheral surface of the hollow cylindrical portion 2e of the rotating member 2a is splashed and atomized by the rotation of the rotating member 2a, the annular space 11 is also cooled by such engine oil. become.

  When a temperature measurement experiment of the stator 3 was performed, a measurement result as shown in FIG. 11 was obtained, and it was found that a sufficient cooling effect was obtained according to the first embodiment.

  As described above, the magnet generator 100 with a starter gear according to the first embodiment includes the stator 3 and the plurality of window hole portions 2d of the rotor 2 from the distal end portion 300a side of the crankshaft 300 toward the central portion side. The hollow disc portion 2c, the one-way clutch 5, and the starter gear 4 are arranged in this order, and the engine cover joint surface 1c joined to the engine case joint surface 200a is located near the starter gear 4 in the axial direction of the crankshaft 300. In the machine 100, the engine cover joint surface 1c is provided with a recess 1d, and the engine cover 1 is provided with an injection hole 1e communicating with the recess 1d. When the rotor 2 rotates, the engine 2 is injected through the recess 1d through the injection hole 1e. The engine oil that has passed through the window hole 2d intermittently passes the surface 3l of the stator 3 facing the hollow disc 2c. Configured to be sprayed in a space 11 which is sandwiched between the opposed surfaces 2k of the stator 3 of the empty disc portion 2c.

  In other words, the magnet generator 100 with a starter gear according to the first embodiment is an engine cover 1 having a substantially U-shaped cross section that is fixed to the engine case 200, from the free ends of the bottom wall 1a and the bottom wall 1a. The engine cover 1 includes an annular side wall 1b having a substantially hollow cylindrical shape extending substantially vertically, and an annular end surface 1c of the annular side wall 1b constitutes an engine cover joining surface joined to the engine case joining surface 200a. A starter gear 4 that is rotatable with respect to a portion 300b of the crankshaft 300 near the front end portion 300a, and a rotor 2 that is connected to the front end portion 300a of the crankshaft 300 and is fixed to the front end portion 300a of the crankshaft 300. A substantially cylindrical boss portion 2b, a hollow disc portion 2c extending perpendicularly to the axial direction of the crankshaft 300 from the free end of the boss portion 2b, and a hollow disc portion 2c. A plurality of window hole portions 2d formed along the circumferential direction, a hollow cylindrical portion 2e extending in parallel with the axial direction of the crankshaft 300 from the outer peripheral free end of the hollow disc portion 2c, and a hollow cylindrical portion 2e A rotor 2 having a permanent magnet 2g disposed on the peripheral surface, disposed between the starter gear 4 and the hollow disc portion 2c, transmits torque from the starter gear 4 side to the rotor 2 side, and the rotor The engine cover 1 is accommodated in an annular space 2j formed by a one-way clutch 5 that does not transmit torque from the side 2 to the starter gear 4 side, a boss portion 2b, a hollow disc portion 2c, a hollow cylindrical portion 2e, and a permanent magnet 2g. A magnet generator 100 with a starter gear including a stator 3 fixed to the bottom wall portion 1a of the engine cover 1 is provided with a recess 1d in the engine cover joint surface 1a, and on the inner peripheral portion of the annular side wall portion 1b of the engine cover 1, The injection hole portion 1e communicating with the portion 1d is provided, and when the rotor 2 rotates, the engine oil injected from the injection hole portion 1e through the recess portion 1d intermittently passes through the window hole portion 2d and faces the stator 3 3l (opposing surface 3l facing the hollow disc portion 2c), the outer peripheral surface 2l of the boss portion 2b and the facing surface 2k of the hollow disc portion 2c (facing surface 2k facing the stator 3) are sprayed. Configured to be.

  According to the first embodiment, the engine oil injected from the injection hole portion 1e intermittently passes through the window hole portion 2d and reaches the stator 3 side, so that heat generation of the stator 3 can be suppressed. Further, since the recess 1d is provided on the engine cover joint surface 1c, the recess 1d can be formed by simple processing. When the engine case 200 is closed with the engine cover 1, the engine cover joint surface 1c The joint surface 200a is joined and the recess 1d is not visible from the outside, so that the design is not deteriorated. Further, the engine oil injected from the injection hole 1e is easily atomized by intermittently passing through the window hole 2d, and the surface 3l of the stator 3 facing the hollow disk 2c and the hollow disk 2c. Since this space 11 is cooled and diffused into the space 11 sandwiched between the opposing surface 2k of the stator 3 and the engine oil is directly injected into the side surface 3l of the stator 3, the effect of suppressing the heat generation of the stator 3 is more effective. growing.

  Further, the injection hole portion 1e is located on the upper side of the engine cover 1 in the vertical direction when the magnet generator 100 with the starter gear is used. Since the injection hole 1e is positioned in this way, the injected engine oil can cool the side surface 3l of the stator 3 from the upper part to the lower part.

  Further, the stator 3 has a connection portion 3g for connecting the lead wire to the outside and the lead wire of the power generation coil 3f on the surface 3m on the side not facing the hollow disc portion 2c. If the connection part 3g is provided on the surface 3l on the side where the engine oil is injected, the connection part 3g makes it difficult for the engine oil to reach the power generation coil 3f and the stator 3 is difficult to cool. Since the connection portion 3g is not provided on the surface 3l on the side where the engine oil is injected, the engine oil easily reaches the power generation coil 3f, and the stator 3 is easily cooled.

  Further, the injection hole 1e is formed of an oblique hole, and the recess 1d is configured in such a shape that allows the punch 7 to enter from the recess 1d and allows the oblique hole 1e to be drilled. Thus, since the recessed part 1d was comprised, the operation | work which opens the diagonal hole 1e becomes easy.

  5 and 6, the magnet generator 100 with a starter gear according to the second embodiment is characterized in that the concave portion 1d is constituted by a linear concave portion, and an injection hole portion 1e is provided at the upper end portion of the linear concave portion 1d. The other configuration is the same as that of the first embodiment.

  According to the second embodiment, the same effect as the first embodiment can be exhibited, and the open end of the oil passage 200b on the engine case 200 side that can communicate with the linear recess 1d as compared with the first embodiment. Therefore, the engine cover 1 can be applied to many types of engines.

  5 and 7, the magnet generator 100 with a starter gear according to the third embodiment is characterized by providing two injection holes 1e, and the rest is configured in the same manner as in the second embodiment.

  According to the third embodiment, since the number of injection holes 1e is two, it is possible to cool the stator 3 uniformly compared to the first and second embodiments. If the number of injection holes 1e is set to three or more, an oil pump with a high injection pressure is required, and the amount of engine oil used for cooling the stator 3 increases, which is used for original engine lubrication. Therefore, it is desirable that the number of injection holes 1e be one or two.

  8-10, the magnet generator 100 with a starter gear which concerns on 4th Embodiment comprised the injection hole part 1e by the grommet 1g and the substantially U-shaped grommet holding hole 1h holding the grommet 1g. The other features are the same as in the second embodiment. The grommet 1g has an injection hole 1i, and the grommet 1g is compressed and deformed by the pressing force from the engine case joint surface 200a and is accommodated and held in the grommet holding hole 1h. The injection hole 1i of the grommet 1g is formed to have a relatively large diameter so that the function as an injection hole can be exhibited even when the grommet 1g is compressed and deformed.

  According to the fourth embodiment, by forming the injection hole portion 1e with the grommet 1g and the grommet holding hole 1h, even if the oblique hole cannot be drilled from the concave portion 1d side, the injection hole composed of the oblique hole is generated. Can do. Further, the sealing performance is ensured by the compression deformation of the grommet 1g.

It is sectional drawing of the magnet generator with a starter gear which concerns on 1st Embodiment of this invention, Comprising: It is sectional drawing by the II line | wire illustration of FIG. It is a side view of a stator when the stator is viewed from the connection part side. FIG. 2 is a side view of the engine cover and the rotor as viewed from the engine center side with the starter gear and the one-way clutch removed in FIG. 1. It is principal part sectional drawing of the annular side wall part of an engine cover. It is sectional drawing of the magnet generator with a starter gear which concerns on 2nd, 3rd embodiment of this invention, Comprising: It is sectional drawing by the VV line shown in FIG. 6, and the VV line shown in FIG. 6 is a side view of a rotor and an engine cover in a magnet generator with a starter gear according to a second embodiment of the present invention, and is a side view when the starter gear and the one-way clutch are removed in FIG. 5 and viewed from the engine center side. 6 is a side view of a rotor and an engine cover in a magnet generator with a starter gear according to a third embodiment of the present invention, and is a side view when the starter gear and the one-way clutch are removed in FIG. 5 and viewed from the engine center side. It is sectional drawing of the magnet generator with a starter gear which concerns on 4th Embodiment of this invention, Comprising: It is sectional drawing by the VIII-VIII line of FIG. It is a side view of the rotor and engine cover in the magnet generator with a starter gear which concerns on 4th Embodiment of this invention, Comprising: The starter gear and the one-way clutch are removed in FIG. 8, and it is a side view when it sees from the engine center side. It is sectional drawing of the principal part and grommet of the annular side wall part of an engine cover. It is a graph which shows the result of the temperature measurement experiment of a stator.

Explanation of symbols

100 Magnet generator with starter gear 1 Engine cover 1a Bottom wall 1b Annular side wall 1c Engine cover joint surface 1d Recess, linear recess 1e Injection hole 1g Grommet 1h Grommet holding hole 2 Rotor 2b Boss 2c Hollow disc 2d Window Hole portion 2e Hollow cylindrical portion 2g Permanent magnet 2j Annular space 2k Opposing surface 2l Outer surface 3 Stator 3f Generator coil 3g Connection portion 3l Opposing surface 4 Starter gear 5 One-way clutch 200 Engine case 200a Engine case joint surface 300 Crankshaft 300a Tip portion 300b Tip Part close to the part

Claims (8)

Engine cover joint in which a stator, a hollow disc portion having a plurality of window hole portions of the rotor, a one-way clutch, and a starter gear are arranged in this order from the front end side of the crankshaft to the center side, and joined to the engine case joint surface In the magnet generator with a starter gear, the surface is located closer to the starter gear in the axial direction of the crankshaft,
The engine cover joint surface is provided with a recess, and the engine cover is provided with an injection hole communicating with the recess,
When the rotor rotates, the engine oil injected from the injection hole through the concave portion intermittently passes through the window hole and the surface of the stator facing the hollow disk and the hollow disk. It is comprised so that it may spray on the space pinched | interposed by the surface facing the said stator of a part. The magnet generator with a starter gear characterized by the above-mentioned. An engine cover having a substantially U-shaped cross section fixed to the engine case, and having a bottom wall portion and a substantially hollow cylindrical annular side wall portion extending substantially vertically from a free end of the bottom wall portion, An annular end surface of the annular side wall portion constitutes an engine cover joint surface joined to the engine case joint surface, and an engine cover;
A starter gear that is rotatable with respect to a portion near the tip of the crankshaft;
A rotor coupled to a tip portion of the crankshaft, a substantially cylindrical boss portion fixed to the tip portion of the crankshaft, and extending perpendicularly to an axial direction of the crankshaft from a free end of the boss portion; An existing hollow disk part, a plurality of window hole parts formed along the circumferential direction in the hollow disk part, and extending in parallel with the axial direction of the crankshaft from the outer peripheral free end of the hollow disk part. A rotor having a hollow cylindrical portion, and a permanent magnet disposed on an inner peripheral surface of the hollow cylindrical portion;
A one-way clutch that is disposed between the starter gear and the hollow disc portion, transmits torque from the starter gear side to the rotor side, and does not transmit torque from the rotor side to the starter gear side;
A magnet generator with a starter gear, comprising: a stator that is housed in an annular space formed by the boss portion, the hollow disc portion, the hollow cylindrical portion, and the permanent magnet, and is fixed to a bottom wall portion of the engine cover. There,
A concave portion is provided on the engine cover joint surface, and an injection hole portion communicating with the concave portion is provided in an inner peripheral portion of the annular side wall portion of the engine cover,
When the rotor rotates, engine oil injected from the injection hole through the recess intermittently passes through the window hole, and faces the hollow disk portion of the stator and the boss portion. A magnet generator with a starter gear, wherein the magnet generator is sprayed into an annular space formed by an outer peripheral surface and a surface of the hollow disc portion facing the stator.   The starter gear-equipped magnet generator according to claim 1, wherein the injection hole portion is located on an upper side in the vertical direction of the engine cover when the magnet generator with the starter gear is used.   The magnet generator with a starter gear according to claim 1, wherein the recess is a linear recess.   The magnet generator with a starter gear according to claim 4, wherein the injection hole portion includes one or two injection holes.   The magnet with a starter gear according to any one of claims 1 to 5, wherein the stator has a connection portion for connecting a lead wire to the outside and a lead wire of the power generation coil on a surface not facing the hollow disc portion. Generator.   The said injection | pouring hole part consists of diagonal holes, and the said recessed part is comprised in the shape which accept | permits the penetration | invasion of a drilling tool from this recessed part side, and can drill the said diagonal hole. A magnet generator with a starter gear according to claim 1.   The injection hole portion includes a grommet having an injection hole and a grommet holding hole for holding the grommet, and the grommet is compressed and deformed by a pressing force from the engine case joint surface and accommodated and held in the grommet holding hole. The magnet generator with a starter gear according to any one of claims 1 to 6, wherein

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