JPH0742431U - Starter support device for motorcycle engine - Google Patents

Abstract

(57) [Summary] [Object] An engine and a transmission mechanism having a transmission case in which a case member is connected to a case portion connected to a crankcase of the engine through an endless gasket made of an elastic material. The power unit is swingably supported by the vehicle body frame of the motorcycle, and both ends of the support shaft included in the starter attached to the engine are the case portion and the holder non-rotatably attached to the case portion. In a starter support device for a motorcycle engine rotatably supported, axial vibration of a holder is prevented without increasing the number of parts. [Structure] A gasket 62 is integrally provided with an elastic support portion 112 sandwiched between a holder 110 and a case member 63.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 According to the present invention, a power unit including an engine and a transmission mechanism having a transmission case in which a case member is joined to a case portion connected to a crankcase of the engine through an endless gasket made of an elastic material is provided. A starter, which is swingably supported by a body frame of a motorcycle and is attached to the engine, includes a starter motor attached to the case portion, a support shaft rotating in conjunction with the starter motor, and a ring gear connected to a crank shaft of the engine. And a pinion movably supported on the support shaft so as to be movable in the axial direction. One end of the support shaft is rotatably supported on the case part, and the pinion is mounted on the holder non-rotatably mounted on the case part. The present invention relates to a starter support device for a motorcycle engine in which the other end of a support shaft is rotatably supported.

[0002]

[Prior art]

 Conventionally, such a device is already known, for example, from Japanese Utility Model Laid-Open No. 59-196579.

[0003]

[Problems to be solved by the device]

 However, in the above-mentioned conventional one, the holder is only non-rotatably attached to the case portion of the transmission case, and a slight axial movement of the holder is allowed, so that the holder can be rotated in accordance with the rotation of the supporting shaft. May vibrate in the axial direction.

The present invention has been made in view of the above circumstances, and provides a starter support device for a motorcycle engine that prevents axial vibration of a holder without increasing the number of parts. The purpose is to

[0005]

[Means for Solving the Problems]

 To achieve the above object, the present invention provides a transmission mechanism having an engine and a transmission case in which a case member is joined to a case portion connected to a crankcase of the engine via an endless gasket made of an elastic material. And a starter attached to the engine includes a starter motor attached to the case, and a support shaft that rotates in conjunction with the starter motor. And a pinion that is supported by a support shaft so as to be disengageable with a ring gear that is connected to the crankshaft of the engine and movably in the axial direction of the support shaft. In a starter support device for a motorcycle engine, wherein the other end of the support shaft is rotatably supported by a holder attached to The basket, the elastic support portion to be sandwiched between the holder and the case member, characterized in that it is integrally connected to.

[0006]

【Example】

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

1 to 7 show an embodiment of the present invention. FIG. 1 is a side view of a scooter type motorcycle, FIG. 2 is a plan view taken along arrow 2 of FIG. 1, and FIG. FIG. 4 is an enlarged sectional view of a main part, FIG. 4 is an enlarged sectional view taken along line 4-4 of FIG. 3, FIG. 5 is a vertical sectional view of a partial notch cut along line 5-5 of FIG. 4, and FIG. 7 is a sectional view taken along line 7-7 of FIG.

First, in FIGS. 1 and 2, a body frame F of a scooter type motorcycle V includes a head pipe 1 that rotatably supports a front fork 7 that suspends a front wheel Wf, and extends downward from the head pipe 1. And a rear frame 3 connected to the lower end of the down tube 2 and extending rearward. The rear frame 3 has a front end connected to the lower end of the down tube 2 and a pair of front frame parts 3a, 3a extending substantially horizontally toward the rear side, and a pair of front frame parts 3a, 3a. A pair of intermediate frame portions 3b, 3b extending upward and rearward, and a rear frame portion 3c for connecting the rear ends of the intermediate frame portions 3b, 3b to each other, and having a substantially elliptical shape in plan view Is.

The vehicle body frame F is covered with a vehicle body cover C. The vehicle body cover C is joined to the front cover 11 that covers the front portion of the head pipe 1 and the upper portions of the front wheels Wf, and is joined to the front cover 11 by the driver. Leg shield 12 that covers the front of the legs of the vehicle, front cover 11 and leg shield 12, and a pair of left and right front side covers 13 and 13 that cover both sides of the front vehicle body A pair of left and right rear lower covers 16 and 16 joined to the floorboard 14 that supports the person's feet, both front side covers 13 and 13 and the floorboard 14 to cover both sides of the rear body, and both rear lower covers 16. , 16 and the rear upper cover 17 joined to the lower board 14, and the like. A rear fender 18 that covers the upper portion of the rear wheel Wr is attached to the rear of the −17. The upper surface of the rear upper cover 17 is open, and the upper opening is covered with a seat 20 on which the driver sits. The seat 20 is hinged to the upper end of the rear upper cover 17 so that the seat 20 can be opened and closed. An article storage chamber 22 opened and closed by the seat 20 is formed below the sheet 20.

Referring also to FIG. 3, a rear wheel Wr serving as a drive wheel is pivotally supported on the rear portion of a power unit P that is swingably supported by a vehicle body frame F. P is composed of a two-cycle forced air cooling engine E and a continuously variable transmission M that transmits the output of the engine E to the rear wheels W r. Thus, the front part of the power unit P swings to both intermediate frame parts 3b, 3b of the rear frame 3 of the vehicle frame F via a link mechanism 24 having a support shaft 23 parallel to the rotation axis of the rear wheel Wr. A rear cushion 25 is movably supported, and a rear cushion 25 is provided between the rear portion of the power unit P and the rear frame 3.

In FIGS. 4 and 5, the cylinder head 26 of the two-cycle forced air cooling engine E is disposed between the intermediate frame portions 3b and 3b of the rear frame 3 and is substantially horizontal to the cylinder head 26. A front end portion of the cylinder block 27 is connected to have an axis, and a crankcase 28 is connected to a rear end portion of the cylinder block 27. A piston 30 is slidably fitted in a cylinder bore 29 of the cylinder block 27, and the piston 30 is connected to a crankshaft 32 as an output shaft via a connecting rod 31.

A cooling fan 34 is connected to one end of a crankshaft 32 protruding from the crankcase 28 via a generator 33, and a shroud 36 that forms a scroll passage 35 around the cooling fan 34 is formed. The cooling fan 34, the cylinder head 26, and the cylinder block 27 are covered.

The shroud 36 is formed by joining a first member 37 that covers the cylinder head 26 and the cylinder block 27 from the front side and a second member 38 that covers the remaining portion. Thus, the first member 37 is fastened to the cylinder head 26 by a plurality of mounting bolts 41 ... With the fastening direction aligned with the axis of the cylinder block 27. That is, the cylinder head 26 has a plurality of mounting bosses 42 protruding in parallel with the axis of the cylinder block 27, and mounting bolts that penetrate the mount rubber 44 interposed between the mounting bolts 42 and the first member 37. 41 ... are screwed into the respective mounting bosses 42.

Moreover, in the portion corresponding to the large number of fins 39 provided on the cylinder head 26, the inner surface of the first member 37 has a semicircular cross-section that is opposed to the tips of the fins 39. Grooves 40 ... Are provided. The outer periphery of a plug seal 47 that is in close contact with the outer periphery of an ignition plug 45 that is screwed into the cylinder head 26 is engaged with the first member 37, and the plug seal 47 covers the outer end of the ignition plug 45. Can be attached and detached and is elastically engaged.

By the way, as shown in FIGS. 1 and 3, a maintenance lid 49 is openably and closably attached to the floor board 14 of the vehicle body cover C on the front extension line of the cylinder head 26. A fuel tank 50 is fixedly arranged below the floorboard 14 so that fuel can be supplied when the lid 49 for opening is opened.

The first member 37 and the second member 38 are engaged with each other so that they can be engaged and disengaged in accordance with a moving operation of the first member 37 along the axis of the cylinder head 26.

The second member 38 of the shroud 36 is provided with an annular partition wall 52 that protrudes toward the inner side, that is, the cooling fan 34 side, corresponding to the rotation locus of the outermost edge of the cooling fan 34. The scroll passage 35 is formed between the partition wall 52 and the outer peripheral wall of the second member 38. The scroll passage 35 gradually increases its flow area along the rotation direction of the cooling fan 34, and the outer peripheral wall of the second member 38 at the portion corresponding to the partition wall 52 extends along the rotation direction. It is formed so that it gradually separates from the partition wall 52 as it advances toward the downstream side. Moreover, a bulging portion 38a bulging outward in the axial direction of the cooling fan 34 is provided in a portion of the second member 38 corresponding to the scroll passage 35, and the bulging portion 38a extends along the rotation direction. It is formed so that the bulge amount gradually increases toward the downstream side.

A circular hole 55 facing the cooling fan 34 is provided in the second member 38 coaxially with the crankshaft 32, and a large number of suction ports 56 communicating with the circular hole 55 are provided between the partition portions 57. The cover 58 attached to the second member 38 is attached to the second member 38, and the sound absorbing material 59 is filled between the second member 38 and the cover 58. A large number of holes are formed in the portion of the second member 38 corresponding to the sound absorbing material 59, and the noise generated in the shroud 38 is absorbed by the sound absorbing material 59 through these holes.

Referring again to FIG. 4, the crankcase 28 is integrally provided with a case portion 61 extending to one side of the rear wheel Wr, and is joined to the case portion 61 via a gasket 62. The transmission case 64 is configured by the case member 63 and the case member 63. As shown in FIG. 6, the gasket 62 is made of an elastic material such as rubber in an endless shape.

A continuously variable transmission M is provided between the other end of the crankshaft 32 protruding from the crankcase 28 and an axle 65 of a rear wheel Wr rotatably supported at the rear of the transmission case 64. Since the continuously variable transmission M is well known in the related art, its structure will be briefly described. The crankshaft 32 has a fixed pulley half 66 fixed to an end of the crankshaft 32, and a crankshaft 32. A drive side transmission pulley 68 including a movable pulley half body 67 mounted on the shaft 32 so as to be slidable in the axial direction is provided. A V-shaped annular groove 69 is formed between the fixed and movable pulley halves 66 and 67, and an endless V belt 70 is inserted into the annular groove 69. A ramp plate 71 is fixed to the crankshaft 32 on the rear surface of the movable pulley half 67, and a plurality of weight rollers 72 are accommodated between the ramp plate 71 and the movable pulley half 67 in a floating state. It When the rotation speed of the crankshaft 32 increases during rotation, the weight roller 72, which receives centrifugal force, moves outward in the radial direction, causing the movable pulley half 67 to move toward the fixed pulley half 66. This makes it possible to increase the contact radius of the V-belt 71 with respect to the two pulley halves 66, 67.

On the other hand, a driven shaft 73 parallel to the crankshaft 32 is rotatably supported by the transmission case 64, and the driven shaft 73 is connected to the axle 65 of the rear wheel Wr via the reduction gear train 74. .

The driven shaft 73 is connected to a driven side transmission pulley 76 coaxial with the driven shaft 73 via a conventionally known centrifugal clutch 75. The driven-side transmission pulley 76 is paired with the driving-side transmission pulley 68, and the V-belt 70 is wound around the driving-side transmission pulley 68.

A vaporizer 80 and an air cleaner 81 connected to the vaporizer 80 are disposed above the transmission case 64. A cover portion 89 that covers the outside of the carburetor 80 extends forward and is integrally connected to the air cleaner 81. On the other hand, in the first member 37 of the shroud 36, at the position on the opposite side of the intake port 56 with respect to the cylinder block 27, an exhaust port (outlet) for discharging the air that has flowed through the shroud 36 and has been heated to the outside ( (Not shown) and an air exhaust port 90 for guiding exhaust air for heat retention to the carburetor 80, a rubber connecting pipe 91 is connected to the air exhaust port 90, and the connection is further made. One end of an air guide duct 92 is connected to the pipe 91.

The air duct 92 is formed by joining a pair of duct halves 93, 94 to each other, and is housed in a recess 95 provided in the case member 63 of the transmission case 64 and the case member 63. Is extended to the carburetor 80 side so as to be substantially flush with the outer surface of the. Moreover, the other end of the air guide duct 92 is fastened to the cover portion 89 by the screw member 96.

Referring to FIG. 7 together, the starter 100 attached to the engine E includes a starter motor 101 mounted on the outside of the case portion 61 of the transmission case 64, and an output torque of the starter motor 101. And a transmission mechanism 102 that can be transmitted to the ring gear 103 at the time of starting. The ring gear 103 is provided on the outer periphery of the fixed pulley half body 66 fixed to the crankshaft 32.

The transmission mechanism 102 has a conventionally well-known configuration, and is supported by the support shaft 104 that rotates in conjunction with the starter motor 101 and the ring gear 103 so as to be disengageable and axially movable on the support shaft 104. The pinion 105 and the pop-out mechanism 106 arranged on the support shaft 104 to control the movement of the pinion 105 in the axial direction. Further, the support shaft 104 is provided with a driven gear 108 that is constantly meshed with a drive gear 107 provided on the output shaft of the starter motor 101.

By the way, one end of the support shaft 104 is rotatably supported by the case portion 61 via a bearing 109. Further, a holder 110 is non-rotatably fitted and attached to the case portion 61, and the other end of the support shaft 104 is rotatably supported by the holder 110 via a bearing 111. Moreover, the gasket 62 is integrally provided with the elastic support portion 112 sandwiched between the holder 110 and the case member 63.

Next, the operation of this embodiment will be described. When the engine E is operated, the cooling fan 34 connected to the crank shaft 32 is rotated, and the air sucked from the intake port 56 is discharged from the cooling fan 34. It is discharged to the cylinder head 26 and the cylinder block 27 side through the scroll passage 35. At this time, the fins 39 of the cylinder head 26 face the grooves 40 provided in the first member 37 of the shroud 36, and the flow resistance between the tips of the fins 39 and the first member 37. Therefore, the cooling air is surely flown between the fins 39 ... And the cooling efficiency is improved.

A part of the air heated by cooling the cylinder head 26 and the cylinder block 27 is discharged to the outside, and the remaining heated air is blown from the air outlet 90 through the connecting pipe 91 to the air guide duct. The gas is discharged toward the vaporizer 80 by 92. This keeps the vaporizer 80 warm.

Further, both ends of the support shaft 104 in the starter 100 are rotatably supported by the case portion 61 and the holder 110 that is non-rotatably mounted on the case portion 61, and between the holder 110 and the case member 63. Since the elastic support portion 112 is sandwiched, the axial vibration of the holder 110 due to the rotation of the support shaft 104 is effectively prevented. Moreover, since the elastic support portion 112 is integrally connected to the gasket 62 sandwiched between the case portion 61 and the case member 63, the number of parts does not increase.

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 modifications can be made without departing from the present invention described in the scope of claims for utility model registration. It is possible to make design changes.

[0032]

[Effect of device]

 As described above, according to the present invention, since the elastic support portion sandwiched between the holder and the case member is integrally connected to the gasket, the axial vibration of the holder can be effectively achieved without increasing the number of parts. Can be prevented.

[Brief description of drawings]

FIG. 1 is a side view of a scooter type motorcycle.

FIG. 2 is a plan view taken along the arrow 2 of FIG.

FIG. 3 is an enlarged view of a main part of FIG.

4 is an enlarged sectional view taken along line 4-4 of FIG.

5 is a partially cutaway vertical cross-sectional view taken along line 5-5 of FIG.

FIG. 6 is a plan view of a gasket.

7 is a sectional view taken along line 7-7 of FIG.

[Explanation of symbols]

 28 crankcase 32 crankshaft 61 case portion 62 gasket 63 case member 64 transmission case 100 starter 101 starter motor 103 ring gear 104 support shaft 105 pinion 110 holder 112 elastic support portion E engine F body frame M continuously variable transmission P as a transmission mechanism P Power unit V motorcycle

Claims (1)

[Scope of utility model registration request] 1. A case member (63) is attached to an engine (E) and a case portion (61) connected to a crankcase (28) of the engine (E) via an endless gasket (62) made of an elastic material. A power unit (P) including a transmission mechanism (M) having a transmission case (64) connected to each other is swingably supported by a vehicle body frame (F) of the motorcycle (V), and the engine (E) ), A starter motor (101) attached to the case portion (61), a support shaft (104) that rotates in conjunction with the starter motor (101), and a crank of the engine (E). Ring gear (1
03), and a pinion (105) supported by a support shaft (104) so as to be disengageable so as to be axially movable. One end of the support shaft (104) is rotatably supported by a case portion (61). In a starter support device for a motorcycle engine, wherein the other end of the support shaft (104) is rotatably supported by a holder (110) non-rotatably mounted on a case portion (61), a gasket (62) includes: Holder (11
0) and the elastic member (112) sandwiched between the case member (63) are integrally connected to each other, and a starter supporting device for a motorcycle engine.