JP5457760B2 - Protective cover structure for saddle-ride type vehicle engine case - Google Patents

Description

The present invention relates to a protective cover structure for an engine case for a saddle-ride type vehicle.

  In a power unit for a saddle-ride type vehicle, the step of putting a passenger's foot is often provided on the side of the engine case of the power unit. For example, in Patent Document 1, the crankshaft of an internal combustion engine is arranged in the vehicle width direction. In the oriented power unit for straddle-type vehicles, a step is provided on the side of the bulging surface of the engine case in the vehicle width direction, and protection is provided to protect the occupant's feet over the entire bulging surface of the engine case in the vehicle width direction. A structure with a cover is shown.

However, in the case of the protective cover for the saddle riding type vehicle engine case as described above, since the protective cover is arranged on the entire surface of the engine case in the vehicle width direction, the engine case is enlarged and the foot comfort is inferior. There was a case.
In addition, since the protective cover covers the entire surface, there are problems of heat dissipation and appearance.

  In the present specification, the “engine case” means a general shell that is a structural member of a power unit for a saddle-ride type vehicle, and constitutes a crankcase and houses a power unit case and a transmission that house a power transmission device. Includes transmission case and transmission cover, generator cover, etc.

JP 2008-080986 A (FIGS. 1 to 3)

The present invention can prevent a passenger's feet from vibration, heat, etc. of an engine case, improve foot comfort, improve operability of a foot brake, and less disturb heat dissipation of an engine case. It is an object to provide a protective cover structure for an engine case.

In order to achieve the above object, the invention according to claim 1 is arranged below the seat and accommodates an engine case for accommodating a crankshaft or a transmission of an internal combustion engine, and a vehicle width direction projected area of the engine case. A protective cover structure for an engine case of a saddle-ride type vehicle provided with a step in which an occupant sits on the seat and puts on shoes, and the engine case is attached to a drive shaft end rotated by the internal combustion engine. Receiving a supported drive pulley, a driven pulley supported by a driven shaft end positioned behind the drive pulley, and a V-belt stretched between the drive pulley and the driven pulley; A transmission cover configured not to support a driven shaft end, the transmission cover having a substantially elliptical shape long in the front-rear direction when viewed in the vehicle width direction, and a longitudinal direction of the transmission cover Step behind the eaves, foot brake is arranged in front, the bulging surface in the vehicle width direction of the transmission cover is formed, the bulge surface is positioned above the at least partially the step, the A protective cover that covers the bulging surface is fixed to and attached to the transmission cover in the front-rear direction, and the protective cover is located between the bulging surface in the vehicle width direction and at least the step when viewed in the vehicle width direction. made form to have uncovered part, the protective cover is in the shape of vertical width becomes wider toward the front to the rear, it is arranged positioned above the tread surface of the foot brake, the protective cover A pair of bosses to be mounted are arranged in front and rear of the drive shaft and the driven shaft in a direction of a line segment connecting the drive shaft and the driven shaft, and the driven shaft and the pair of bosses are driven by the same A protective cover structure of a saddle-ride type vehicle engine casing, characterized in that disposed to overlap in the axial position of the.

According to a second aspect of the present invention, in the protective cover structure for the saddle riding type vehicle engine case according to the first aspect, the protective cover is disposed above the tread surface of the foot brake, and the transmission cover The upper portion of the bulging surface in the vehicle width direction is also covered.

According to a third aspect of the present invention, in the protective cover structure for the saddle riding type vehicle engine case according to the first or second aspect , a rubber member is provided between the transmission cover and the protective cover. It is characterized by.

According to a fourth aspect of the present invention, in the protective cover structure for a saddle-ride type vehicle engine case according to any one of the first to third aspects, the outer peripheral portion of the protective cover is thicker than other portions of the protective cover. is larger edge formation is, with the same edge is in direct contact with the transmission cover, the protective cover is characterized in that attached to the transmission cover.

According to the protective cover structure for the saddle riding type vehicle engine case of the first aspect of the present invention, the protective cover is disposed on the bulging surface in the vehicle width direction of the engine case close to the passenger's foot above the step. Can be protected from the heat and vibration of the engine case. On the other hand, since the protective cover is not disposed at the position of the shoe sole of the occupant that is the widest, interference between the protective cover and the shoe sole of the occupant can be avoided, and foot comfort can be improved. In addition, since the entire side surface of the engine case is not covered with the protective cover, the heat dissipation is hardly hindered and the appearance can be improved.
Further, since the protective cover is disposed above the foot brake tread and the front portion has a narrow vertical width, interference between the protective cover and the shoe sole can be avoided when the toe of the occupant is moved greatly during the foot brake operation. On the other hand, since the vertical width of the rear portion of the protective cover is large, the occupant's feet, particularly the heel, can be positioned within the protective cover width, and the comfortability of the feet is improved.
Further, when the engine case is a transmission cover of a V-belt type transmission, the transmission cover does not support the drive shaft end or driven shaft end of the transmission, so that the vibration of the drive shaft or driven shaft of the transmission is changed. Since it is difficult to be transmitted to the machine cover, and the protective cover is provided on the transmission cover, vibration is not easily transmitted to the passenger's feet, and the foot comfortability on the side of the transmission cover is improved.
And since the driven shaft axial position of the boss to which the protective cover is attached is pulled inward in the vehicle width direction so as to overlap the driven shaft, the fastening bolt that is screwed into the boss and fastens the protective cover to the transmission cover The head of the arm can be retracted from the surface of the protective cover, eliminating interference between the occupant's foot and the protective cover fastening bolt on the surface of the protective cover. can do.

  According to the invention of claim 2, in addition to the effect of the invention of claim 1, the protective cover is disposed above the foot brake tread surface. Interference with the sole is avoided. The protective cover also covers the upper part of the bulging surface of the engine case in the vehicle width direction, making it difficult to transfer heat to the occupant's feet, calves and thighs within the width of the protective cover, and to improve foot comfort. .

According to the invention of claim 3, in addition to the effects of the invention of claim 1 or claim 2 , a rubber member is provided between the engine case and the protective cover, so that a vibration damping and heat insulating effect can be obtained. The vibration and heat transmitted to the passenger's feet can be reduced by the structure.

According to the invention of claim 4, in addition to the effect of the invention of any one of claims 1 to 3 , the edge of the outer periphery of the protective cover increases the rigidity of the protective cover so that the occupant's feet are in contact with each other. However, the protective cover is difficult to dent and a space can be maintained between the engine case and the protective cover, so vibration and heat transmitted to the occupant's feet can be prevented by a simple structure without providing vibration damping or heat insulation members such as rubber members. Can be reduced.

1 is a left side view of a motorcycle on which a power unit including a protective cover structure for a saddle riding type vehicle engine case according to Embodiment 1 of the present invention is mounted. 3 is a right side cross-sectional view of the power unit according to Embodiment 1. FIG. FIG. 3 is a developed sectional view taken along the line III-III in FIG. 2. FIG. 3 is an external right side view of a power unit including a protective cover structure for a saddle riding type vehicle engine case according to the first embodiment. It is explanatory drawing of the position in the right side surface of the protective cover structure of the engine case for saddle riding type vehicles which concerns on Embodiment 1, a step, a foot brake, and a passenger | crew. It is explanatory drawing of the position of the protective cover structure of the straddle-type vehicle engine case which concerns on Embodiment 1, and a step, a foot brake, and a passenger | crew's foot by the VI-VI arrow view in FIG. It is explanatory drawing of the position seen from the front right of the protective cover structure of the engine case for saddle riding type vehicles which concerns on Embodiment 1, and a step, a foot brake, and a passenger | crew. It is explanatory drawing of the position which looked at the protective cover structure of the engine case for saddle riding type vehicles which concerns on Embodiment 1, and the step, the foot brake, and the passenger | crew's foot from the right rear. FIG. 6 is a right side external view of a power unit having a protective cover structure for a saddle riding type vehicle engine case according to a second embodiment.

A protective cover structure for an engine case for a saddle-ride type vehicle according to Embodiment 1 of the present invention will be described with reference to FIGS.

In the following description, the directions such as front, rear, left, right, up, down, etc. follow the direction of the vehicle when the power unit equipped with the protective cover structure of the saddle type vehicle engine case of this embodiment is mounted on a vehicle such as a motorcycle. And Further, unless otherwise specified, the arrow FR in the figure indicates the front of the vehicle, LH indicates the left side of the vehicle, RH indicates the right side of the vehicle, and UP indicates the upper side of the vehicle.

  FIG. 1 shows a left side surface of a motorcycle 1 (“saddle-type vehicle” in the present invention) 1 according to the present embodiment. A body frame 2 of the motorcycle 1 is inclined obliquely downward and rearward from a head pipe 3 at the front of the vehicle body, and one main frame 4 extends, and a pair of left and right pivot brackets 5 are disposed at the rear of the main frame 4. 5 extends downward and is fixed. A pair of left and right seat rails 6, 6 extend rearward and obliquely upward from the vicinity of the fixing position of the pivot brackets 5, 5 at the rear portion of the main frame 4, and bend in the middle to reach the rear end. Middle frames 7 and 7 are interposed between the center portions of the seat rails 6 and 6 and the pivot brackets 5 and 5.

  A storage box 8 and a fuel tank (not shown) are installed between the pair of left and right seat rails 6 of the vehicle body frame 2, and a seat 9 covers the storage box 8 and the like so as to be freely opened and closed. A front fork 10 pivotally supported by the head pipe 3 extends below the front of the vehicle body, a front wheel 11 is pivotally supported at the lower end thereof, and a steering handle 12 is provided above the front fork 10. A pivot shaft 13 provided in pivot brackets 5 and 5 at the center of the vehicle body supports a rear fork 14 that is pivotally supported at the front end and extends rearward. A rear wheel 15 is pivotally supported at the rear end. Rear cushions 16, 16 are interposed between the rear portion of the rear fork 14 that swings up and down about the pivot shaft 13 and the seat rails 6, 6.

  A power unit 17 is mounted below the main frame 4 and in front of the pivot brackets 5 and 5. The power unit 17 is suspended from a support bracket 29 provided on the main frame 4 via a support shaft 30 and is supported by support shafts 31 at the upper and lower portions of the pivot brackets 5 and 5. The body frame 2 is covered with a synthetic resin cover member 32 divided into various parts. In FIG. 1, 70 is a side stand and 71L is a left step for passengers.

  The power unit 17 includes a front internal combustion engine 18 and a rear power transmission device 19. The internal combustion engine 18 is a single-cylinder four-stroke cycle internal combustion engine, and when mounted on the motorcycle 1, the crankshaft 35 (see FIGS. 2 and 3) is oriented in the vehicle width direction and serves as a power unit case (also serves as a crankcase). ) The cylinder block 21, the cylinder head 22, and the cylinder head cover 23 constituting the cylinder part 210 are stacked from the front surface of 20, and protruded and attached in a posture that is largely inclined forward to a substantially horizontal state. A throttle body 25 and an air cleaner 26 are connected to an intake pipe 24 extending above the cylinder head 22. Further, an exhaust pipe 27 that extends below the cylinder head 22 and bends backward is extended rearward and connected to a muffler 28 on the right side of the rear wheel 15.

  As shown in the right side cross section of the power unit 17 in FIG. 2, the cylinder portion 210 of the power unit 17 has its axis X (cylinder axis) substantially horizontal (in detail, slightly raised in front) and the front end of the power unit case 20. It protrudes forward (vehicle traveling direction) from the part. The cylinder head 22 and the cylinder block 21 are integrally coupled and fixed to the power unit case 20 by a plurality of fastening bolts (not shown) penetrating them from the front of the vehicle.

  The shell for housing the power transmission device 19 will be described later with reference to FIG. 3, but the power unit case 20 includes a left power unit case 20L and a right power unit case 20R, which are divided into left and right parts. As shown in FIG. The power unit 17 is configured by integrally coupling the case 20L and the right power unit case 20R at the mating surface Y and further attaching the cylinder part 210. The outer shell of the power transmission device 19 shown in FIG. 2 is the right side surface of the right power unit case 20R. The power transmission device 19 includes a V-belt type continuously variable transmission 33 and a reduction gear mechanism 34.

  The power unit 17 includes a motor start mechanism 47 and a kick start mechanism 51. The motor start mechanism 47 includes a drive pinion 48a driven by a starter motor 48, a motor start mechanism intermediate shaft (not shown), large and small gears provided on the intermediate shaft, and a left portion 35L of the crankshaft 35 (see FIG. 3). The motor start mechanism driven gear 50 is provided in the motor. The motor start mechanism 47 is a speed reduction mechanism. The starter motor 48 is disposed in front of a vertical line C passing through the center of the crankshaft 35 as shown in the figure.

  The kick starting mechanism 51 includes a kick shaft 52, a kick arm 52a and a kick pedal 52b (see FIG. 1), a first intermediate shaft 53a, a second intermediate shaft 53b, a gear group provided on these shafts, and a crank shaft 35. A kick start mechanism driven gear 54 (see also FIG. 3) provided on the right side, and the like. The kick start mechanism 51 is a speed increasing mechanism. The kick shaft 52 is disposed between the crank shaft 35 and the output shaft 43 and below the two shafts.

  As shown in FIG. 3, the cylinder block 21 has a cylinder bore 55 along the cylinder axis X formed therein, and a piston 56 is fitted in the cylinder bore 55 so as to be able to reciprocate. A small end portion of a connecting rod 59 is swingably connected to the piston 56 via a piston pin 57 along the left-right direction, and a large end portion of the connecting rod 59 is connected to the crankshaft 35 via a crank pin 58 along the left-right direction. It is connected rotatably. The crankshaft 35 rotates clockwise in FIG. 2 showing the right side as the piston 56 reciprocates during normal operation of the power unit 17.

  The internal combustion engine 18 employs a SOHC type valve system, and a valve mechanism 60 is provided in the cylinder head cover 23. A cam chain 61 for transmitting power to the valve mechanism 60 includes a cam chain drive sprocket 62 fitted to the left extension 35L of the crankshaft 35 and a cam chain driven sprocket 64 fitted to the left end of the cam shaft 63. The camshaft 63 is interlocked and rotated in the same direction at half the rotational speed of the crankshaft 35. For this purpose, a cam chain chamber 65 is provided in communication with the left power unit case 20L, the cylinder block 21, and the cylinder head 22. A combustion chamber 66 is formed on an end surface of the cylinder head 22 on the cylinder block 21 side, and a spark plug 67 is fitted from the right outer side of the cylinder head 22 toward the combustion chamber 66.

  A drive pulley shaft 36 of a V-belt type continuously variable transmission (“transmission” in the present invention) 33 is coaxially disposed at the right end portion of the crankshaft 35, and a driven pulley shaft (the present invention) The “driven shaft” 37) is provided at the rear part of the power unit case 20. A V-belt 40 is wound around a driving pulley 38 provided on the driving pulley shaft ("driving shaft" in the present invention) 36 and a driven pulley 39 provided on the driven pulley shaft 37, and a V-belt type continuously variable transmission. Machine 33 is configured. 33a is a transmission case, and 33b is a transmission cover. An AC generator 68 is provided on the left extension 35L of the crankshaft 35. 68a is a generator cover.

  In the present embodiment, the transmission cover 33b is a structural member that forms the shell of the power unit 17 of the motorcycle 1 that is the “saddle-type vehicle” of the present invention, and corresponds to the “engine case” of the present invention.

  However, the “saddle type vehicle” of the present invention is not limited to the aspect of the motorcycle 1 of the present embodiment, includes various aspects, and the power unit is not limited to the aspect of the power unit 17 of the present embodiment. The “engine case” of the present invention is not limited to the transmission cover 33b of the present embodiment, but is another type of “saddle-type vehicle” such as a power unit case, transmission case, transmission case, generator cover, etc. Including the case of other structural members forming the shell of the power unit.

  A wet centrifugal clutch 41 having substantially the same diameter is provided coaxially with the driven pulley 39 of the driven pulley shaft 37 of the V-belt type continuously variable transmission 33, and the left side portion of the driven pulley shaft 37. 37L is an input shaft of the reduction gear mechanism 34. The rotation shaft of the reduction gear mechanism 34 includes a left portion 37L of the driven pulley shaft 37, a reduction gear mechanism intermediate shaft 42, and an output shaft 43. The reduction gear mechanism 34 is configured by a gear group provided on these shafts. Yes. The output shaft 43 protrudes leftward from the rear part of the left power unit case 20L. The rotational driving force of the power unit 17 is output via the output shaft 43. As shown in FIG. 1, a power transmission chain 46 is bridged between a rear wheel drive sprocket 44 fitted to the output shaft 43 and a rear wheel driven sprocket 45 provided integrally with the rear wheel 15, The rotational driving force of the power unit 17 is transmitted to the rear wheel 15. 44a is a rear cover that covers the left side surface of the power unit case 20 from the generator cover 68a to the rear wheel drive sprocket 44.

  As shown in FIG. 3, the transmission cover 33 b of the power unit 17 of the present embodiment has a vehicle width direction bulging surface 80 formed on the right side thereof, and the vehicle width direction bulging surface 80 is covered with a protective cover 81. Yes. The material of the protective cover 81 is, for example, PA6 (6 nylon). A rubber member 82 as a vibration isolating material and / or a heat insulating material is provided between the bulging surface 80 in the vehicle width direction of the transmission cover 33b and the protective cover 81. In this specification, the rubber member 82 includes a natural rubber material, a synthetic rubber material, or a resin member, and a suitable material such as a solid material, a foam material, or a porous material is used.

  As shown in the figure, the protective cover 81 is fastened to the screw holes of a pair of bosses 83a and 83b provided on the front and rear sides of the transmission cover 33b by fastening bolts 84a and 84b, respectively. As shown in FIG. 4, the front boss 83a is arranged in front of the drive pulley shaft 36 and the driven pulley shaft 37 in the direction of the line segment D connecting the drive pulley shaft 36 and the driven pulley shaft 37, and The boss 83 b is disposed behind the drive pulley shaft 36 and the driven pulley shaft 37.

  Further, as shown in FIG. 3, the driven pulley shaft 37 and the bosses 83a and 83b are positioned so that the axial positions of the driven pulley shaft 37 are overlapped (in the drawing, the overlapping lengths La and Lb). It is arranged. That is, the bosses 83a and 83b are arranged so as to be drawn inward in the vehicle width direction from the right shaft end 37a of the driven pulley shaft 37.

  Therefore, the positions of the protective cover mounting surfaces 85a and 85b of the bosses 83a and 83b to which the protective cover 81 is attached and the mounting flange portions 86a and 86b of the protective cover 81 are also drawn inward from the surface 81c of the protective cover 81 in the vehicle width direction. The heads of the fastening bolts 84 a and 84 b are provided and are retracted from the surface 81 c of the protective cover 81.

  For this reason, there is no interference between the occupant's foot 90 (see FIGS. 5 and 6) and the fastening bolts 84a and 84b on the surface 81c of the protective cover 81, the occupant's foot comfort is improved, and the operation of the foot 90 is improved. .

  Further, the transmission cover 33b as an engine case of the present invention includes a driving pulley 38 supported on an end portion of the driving pulley shaft 36 and an end portion of a driven pulley shaft 37 positioned behind the driving pulley 38 as shown in the figure. The driven pulley 39 and the V-belt 40 supported by the motor are accommodated, but the end of the drive pulley shaft 36 and the end of the driven pulley shaft 37 are not supported.

  Therefore, the vibrations of the drive pulley shaft 36 and the driven pulley shaft 37 are not easily transmitted to the transmission cover 33b. Since the protective cover 81 is further attached and fixed to the transmission cover 33b, vibrations are not easily transmitted to the occupant's feet 90, and the occupant's feet comfortability on the side surface of the transmission cover 33b is improved.

  Furthermore, as described above, since the rubber member 82 is provided between the transmission cover 33b and the protective cover 81, a higher vibration damping and heat insulating effect by the protective cover 81 can be obtained and simplified. Vibration and heat transmitted to the occupant's feet 90 can be reduced by the structure.

  4 and 5, in the state where the power unit 17 of the present embodiment is mounted on the motorcycle 1, most of the bulging surface 80 in the vehicle width direction of the transmission cover 33b is seated on the seat 9. It is located above the right step 71R on which the shoe sole ("shoes" in the present invention) 90a is placed. The protective cover 81 covers the bulging surface 80 in the vehicle width direction, and the bulging surface 80 in the vehicle width direction as viewed in the vehicle width direction has a lower portion 80a that is not covered with the protective cover 81 between the right step 71R. Yes.

  Therefore, as shown in FIG. 6, the left and right steps 71L and 71R are attached to the lower part of the power unit 17 via the step bar 71a and are located so as to protrude to the side of the power unit 17, but above the right step 71R. By disposing the protective cover 81 on the bulging surface 80 in the vehicle width direction of the transmission cover 33b close to the occupant's foot 90, the occupant's foot 90 can be protected from vibration and heat of the transmission cover 33b. In addition, since the protective cover 81 is not disposed at the position of the occupant's shoe sole 90a which is the widest, the interference between the protective cover 81 and the occupant's sole 90a can be avoided, and the opening of the foot 90 in the riding state can be prevented. It can be made smaller and the comfort of feet is improved. Further, since the entire side surface of the transmission cover 33b is not covered with the protective cover 81, the heat dissipation is hardly hindered and the appearance can be improved.

  As shown in FIGS. 4 and 5, the transmission cover 33b of the present embodiment has a substantially elliptical shape that is long in the front-rear direction when viewed in the vehicle width direction, and the right step 71R is rearward from the longitudinal center of the transmission cover 33b. A foot brake 75 is disposed in front, and the protective cover 81 has a shape in which the vertical width increases from the front to the rear, and is disposed above the tread surface 75a of the foot brake 75.

  7 shows a state in which the protective cover 81 of the transmission cover 33b, the right step 71R, the foot brake 75, and the occupant's foot 90 are viewed from the front right of the motorcycle 1, and FIG. A state is shown in which the protective cover 81 of the transmission cover 33b, the right step 71R, the foot brake 75, and the occupant's foot 90 are viewed from the right rear.

  Therefore, as shown in the figure, the protective cover 81 is disposed above the tread surface 75a of the foot brake 75, and the vertical width of the front portion 81a of the protective cover 81 is narrow. Therefore, when operating the foot brake 75, the occupant's toe 90b is increased. When moving, interference between the protective cover 81 and the shoe sole 90a can be avoided. Further, since the vertical width of the rear portion 81b of the protective cover 81 is large, the occupant's feet 90, particularly the heel 90c, can be positioned within the width of the protective cover 81 (see FIG. 5), and foot comfort is improved.

  In the above-described embodiment, the rubber member 82 is provided between the protective cover 81 and the transmission cover 33b to improve the effect of vibration suppression and heat insulation. Even if the rubber member 82 is not provided, vibration suppression and heat insulation can be improved.

  That is, although not shown, instead of (or in addition to) providing the rubber member 82, an edge portion having a thickness larger than that of the other portion of the protective cover 81 is formed on the outer peripheral portion 81e of the protective cover 81, and the edge portion is formed. The protective cover 81 may be attached to the transmission cover 33b by directly contacting the transmission cover 33b.

  In that case, the edge of the outer peripheral portion 81e of the protective cover 81 increases the rigidity of the protective cover 81, and the protective cover 81 is difficult to be depressed even when the occupant's feet 90 come into contact with each other. Therefore, the vibration and heat transmitted to the occupant's feet 90 can be reduced with a simple structure without providing vibration suppression and heat insulation members such as the rubber member 82.

  Based on FIG. 9, a protective cover for a saddle-ride type vehicle engine case according to Embodiment 2 of the present invention will be described.

  The protective cover 88 of the present embodiment is different from the protective cover 81 of the first embodiment in that the upper portion 88d of the protective cover 88 also covers the upper portion 80b of the vehicle width direction bulging surface 80 of the transmission cover 33a. The point is the same as that of the protective cover 81 of the first embodiment.

  That is, the transmission cover 33b has a substantially oval shape that is long in the front-rear direction when viewed in the vehicle width direction, the right step 71R is disposed behind the center of the transmission cover 33b in the longitudinal direction, and the foot brake 75 is disposed in front. It is the same that most of the bulging surface 80 in the vehicle width direction 33b is located above the right step 71R where the occupant sits on the seat 9 and places the shoe sole (shoe) 90a.

  Further, the protective cover 88 is disposed above the tread surface 75a of the foot brake 75, covers the vehicle width direction bulging surface 80, and the vehicle width direction bulging surface 80 when viewed in the vehicle width direction is connected to the right step 71R. The lower portion 80a that is not covered with the protective cover 88 is the same as the protective cover 81 of the first embodiment.

  However, in the protective cover 88 of the present embodiment, the upper portion 88d between the front portion 88a and the rear portion 88b also covers the upper portion 80b of the bulging surface 80 in the vehicle width direction.

  Therefore, according to the protective cover 88 of the present embodiment, like the protective cover 81 of the first embodiment, when the foot brake 75 is operated, when the occupant's toe 90b is moved largely, interference between the protective cover 88 and the shoe sole 90a occurs. The occupant's feet 90, particularly the heel 90c, can be located within the range of the protective cover 88 (see FIG. 5 above), and in addition to good foot comfort, the protective cover 88 Since the upper portion 80b of the bulging surface 80 in the vehicle width direction of the cover 33b is also covered, it is difficult to transfer heat to the occupant's feet 90, calves and thighs within the width of the protective cover 88, and foot comfort is further improved.

  Other functions and effects are the same as those of the protective cover 81 of the first embodiment.

  Similarly, the rubber member 82 is provided between the protective cover 88 and the transmission cover 33b, and the effect of vibration suppression and heat insulation can be improved with a simple structure. Then, instead of (or in addition to) providing the rubber member 82, an edge having a larger thickness than the other part of the protective cover 88 is formed on the outer peripheral part 88e of the protective cover 88, and the edge is directly attached to the transmission cover. The protective cover 88 may be attached to the transmission cover 33b in contact with 33b.

  The edge of the outer peripheral portion 88e increases the rigidity of the protective cover 88, and the protective cover 88 is difficult to dent even if the occupant's feet 90 come into contact with each other, and a space can be maintained between the transmission cover 33b and the protective cover 88. The vibration and heat transmitted to the occupant's feet 90 can be reduced with a simple structure without providing the rubber member 82 or the like with a vibration control or heat insulation member.

  Although the embodiment of the present invention has been described above, the “saddle-type vehicle” (and its power unit) according to the present invention is not limited to the illustrated embodiment, and the “engine case” according to the present invention As described above, the present invention is not limited to the transmission cover described in the embodiment, and the “protective cover for the saddle type vehicle engine case” of the present invention is a protective cover for the engine case of the saddle type vehicle of various aspects. As applicable. Further, the materials of the protective covers 81 and 88 are not limited to those exemplified above, and may be appropriately selected or combined depending on use conditions and the like.

  DESCRIPTION OF SYMBOLS 1 ... Motorcycle (saddle-type vehicle), 2 ... Body frame, 9 ... Seat, 11 ... Front wheel, 15 ... Rear wheel, 17 ... Power unit, 18 ... Internal combustion engine, 19 ... Power transmission device, 20 ... Power unit case, 20L ... Left power unit case, 20R ... Right power unit case, 21 ... Cylinder block, 22 ... Cylinder head, 23 ... Cylinder head cover, 33 ... V belt type continuously variable transmission (transmission), 33a ... Transmission case, 33b ... Transmission Cover (engine case), 35 ... crankshaft, 36 ... drive pulley shaft (drive shaft), 37 ... driven pulley shaft (driven shaft), 38 ... drive pulley, 39 ... driven pulley, 40 ... V belt, 43 ... output shaft , 68a ... generator cover, 71R ... right step (step), 75 ... foot brake, 75a ... tread surface, 80 ... bulging surface in the vehicle width direction, 80a ... lower portion, 80b ... upper portion, 81 ... protective cover, 81e ... outer periphery Part, 82 ... rubber part , 83a, 83 b ... boss, 88 ... protective cover, 88d ... top, 88e ... outer peripheral portion, 90 ... leg, 90a ... sole (shoe), 90b ... toe, 90c ... ankle, 210 ... cylinder unit

Claims (4)

An engine case (33b) that is disposed below the seat (9) and accommodates the crankshaft (35) or the transmission (33) of the internal combustion engine (18), and within the projected area in the vehicle width direction of the engine case (33b) A protective cover structure for an engine case of a saddle-ride type vehicle, provided with a step (71L, 71R) arranged and seated on the seat (9) and mounting shoes (71L, 71R),
The engine case (33b) includes a drive pulley (38) supported at an end of a drive shaft (36) rotated by the internal combustion engine (18), and a driven shaft (37) positioned behind the drive pulley (38). A driven pulley (39) supported at an end, and a V belt (40) stretched between the drive pulley (38) and the driven pulley (39) are accommodated, and the end of the drive shaft (36) and the driven A transmission cover (33b) configured not to support the end of the shaft (37);
The transmission cover (33b) has a substantially elliptical shape that is long in the front-rear direction when viewed in the vehicle width direction, and the steps (71L, 71R) are located on the rear side from the center in the longitudinal direction of the transmission cover (33b). Each brake (75) is arranged,
A bulging surface (80) is formed in the vehicle width direction of the transmission cover (33b) , and at least a part of the bulging surface (80) is located above the steps (71L, 71R),
A protective cover (81) that covers the bulging surface (80) is fixedly attached to the transmission cover (33b) in the front-rear direction, and the protective cover (81) is seen in the vehicle width direction and is in the vehicle width direction. the bulging surface (80) of at least step (71L, 71R) made form so as to have the not covered with the protective cover (81) portion between,
The protective cover (81) has a shape in which the vertical width increases from the front to the rear, and is disposed above the tread surface of the foot brake (75).
A pair of bosses (83a, 83b) to which the protective cover (81) is attached are in the direction of a line segment connecting the drive shaft (36) and the driven shaft (37), and the drive shaft (36) and the driven shaft (37 ) Arranged forward and rearward, and the driven shaft (37) and the pair of bosses (83a, 83b) are arranged so as to overlap (La, Lb) at the axial position of the driven shaft (37). A protective cover structure for an engine case for a saddle-ride type vehicle. The protective cover (81) is disposed above the tread surface (75a) of the foot brake (75), and also covers the upper portion of the bulging surface (80) in the vehicle width direction of the transmission cover (33b). The protective cover structure for an engine case for straddle-type vehicles according to claim 1. The protection of the saddle type vehicle engine case according to claim 1 or 2 , wherein a rubber member (82) is provided between the transmission cover (33b) and the protective cover (81). Cover structure . The outer periphery (88e) of the protective cover (33b) is formed with an edge that is thicker than the other parts of the protective cover (33b), and the edge is brought into direct contact with the transmission cover (33b). 4. The protective cover structure for an engine case for a saddle-ride type vehicle according to any one of claims 1 to 3 , wherein the protective cover is attached to the transmission cover (33b) .

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