JP2005125919A - Saddle-riding type vehicle, and scooter type motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a saddle-riding type vehicle and a scooter type motorcycle capable of preventing direct contact with a curb of a road, a speed breaker or the like by a protective member. <P>SOLUTION: In the saddle-riding type vehicle having an engine 5, and a transmission unit which supports a rear wheel 3 by a rear end and transmits the driving force of the engine 5 to the rear wheel 3, the engine 5 has an engine component which is protruded downwardly from a lower end of a cylinder and mounted on the engine 5, and a protective member A which is protruded further downwardly from a lower end of the engine component. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a straddle-type vehicle such as a motorcycle or a motorcycle and a scooter-type motorcycle.

Conventionally, as a saddle type vehicle, for example, a scooter type motorcycle includes a unit swing type power unit having an integrally formed engine and a transmission case. In such a scooter type motorcycle, an oil of a crankcase is used. The position of the pan is low and close to the road surface (for example, Patent Document 1).
Japanese Patent Laid-Open No. 5-163921

  Thus, in a saddle-ride type vehicle, an engine part, for example, an oil pan protrudes downward from the lower end of the cylinder, and when turning or when the vehicle body is tilted, or a unit swing type power unit swings up and down, There is a risk of direct contact with curbs.

  The present invention has been made in view of the above points, and provides a saddle riding type vehicle and a scooter type motorcycle capable of preventing direct contact with a road curb, a speed breaker, and the like by a protective member. It is aimed.

  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

The invention according to claim 1 is a straddle-type vehicle including an engine and a transmission unit that supports a rear wheel at a rear end and transmits a driving force of the engine to the rear wheel.
The engine includes an engine component attached to an engine protruding downward from a lower end of a cylinder,
A straddle-type vehicle provided with a protective member that protrudes further downward from a lower end of the engine component.

  The invention according to claim 2 is the straddle-type vehicle according to claim 1, wherein the engine component is an oil pan provided in a lower part of a crankcase of the engine.

  The invention according to claim 3 is characterized in that the protection member includes a central protection guide provided at a substantially center in the vehicle width direction, and a right protection guide and a left protection guide provided at a front side portion of the center protection guide. A straddle-type vehicle according to claim 1 or 2.

  According to a fourth aspect of the present invention, the crankcase includes a right side case and a left side case, and a right protective guide and a left protective guide are formed in each of the oil pan portions. It is a riding vehicle.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the engine component is an exhaust pipe extending from the lower side of the engine cylinder to one side in the vehicle body width direction. This is a saddle type vehicle.

  The invention according to claim 6 is provided with an exhaust pipe protection plate for protecting the exhaust pipe, and the exhaust pipe protection plate is disposed in front of the lower end of the right side protection guide and the left side protection guide whose lower end is formed in an oil pan portion. The straddle-type vehicle according to claim 5, wherein the straddle-type vehicle is provided.

  The invention according to claim 7 is characterized in that the exhaust pipe protection plate is disposed in front of the right side protection guide and the lower end of the left side protection guide formed in the oil pan portion. It is a straddle-type vehicle.

The invention according to claim 8 is the saddle riding type vehicle according to any one of claims 1 to 4, wherein the protective member has a curved surface shape part that rises forward. In the invention according to claim 9, the exhaust pipe protection plate is made of iron material,
The straddle-type vehicle according to claim 5 or 6, wherein the right protection guide and the left protection guide are made of an aluminum material.

The invention according to claim 10 includes a drain portion for draining drainage accumulated in the oil pan and a drain bolt.
The saddle riding type vehicle according to claim 3, wherein the central protection guide is formed so as to cover the periphery of the drain bolt.

The invention according to claim 11 is a unit swing type power unit comprising an engine and a transmission unit integrally connected to the engine and supporting a rear wheel at a rear end and transmitting a driving force of the engine to the rear wheel. When,
In a scooter type motorcycle including a swing support unit that swingably supports the unit swing type power unit on a vehicle body,
The engine includes an engine component attached to an engine protruding downward from a lower end of a cylinder,
A scooter type motorcycle having a protective member protruding further downward from a lower end of the engine component.

  With the above configuration, the present invention has the following effects.

  In the first aspect of the invention, the engine is provided with a protective member that protrudes further downward from the lower end of the engine component that protrudes downward from the lower end of the cylinder. The engine can be protected because it is in direct contact with the curb or the like before the engine.

  In the invention according to claim 2, the engine part is an oil pan provided at the lower part of the crankcase of the engine, so that the oil pan can be effectively protected.

  In the invention according to claim 3, the protective member has a central protective guide provided substantially at the center in the vehicle width direction, and a right protective guide and a left protective guide provided on the front side portion of the central protective guide, The contacted part can be made thicker and strong protection is possible.

  In the invention according to claim 4, the crankcase is composed of a right case and a left case, and the right protective guide and the left protective guide are formed in the respective oil pan portions, so that the left and right protective guides can be easily manufactured. is there.

  In the invention according to claim 5, the engine component is an exhaust pipe extending from the lower side of the cylinder of the engine to one side in the vehicle body width direction. When turning or when the vehicle body is tilted, Protection is possible and the exhaust pipe can be effectively protected.

  In the invention described in claim 6, the exhaust pipe protection plate for protecting the exhaust pipe is provided, and the lower end of the exhaust pipe protection plate is disposed in front of the lower end of the right side protection guide and the left side protection guide formed in the oil pan portion. Thus, the exhaust pipe protection plate comes into contact with the curbstone or the like before the right side protection guide and the left side protection guide, and the oil pan can be effectively protected.

  In the invention according to claim 7, the exhaust pipe protection plate is disposed in front of the lower ends of the right side protection guide and the left side protection guide formed in the oil pan portion, so that the exhaust pipe protection plate is more than the right side protection guide and the left side protection guide. The oil pan can be effectively protected by contacting the curb first.

  In the invention according to the eighth aspect, the protective member has a curved surface shape part that rises forward, whereby the impact on the protective member can be weakened.

  In the invention according to claim 9, the exhaust pipe protection plate is made of iron material, and the right side protection guide and the left side protection guide are made of aluminum material. The oil pan can be protected by contacting the left side protection guide.

  In the invention according to claim 10, the drain part for draining the drain accumulated in the oil pan and the drain bolt are provided, and the central protection guide is formed so as to cover the periphery of the drain bolt, thereby preventing damage around the drain bolt. it can.

  In the invention according to claim 11, the engine includes an engine component attached to the engine that protrudes downward from the lower end of the cylinder, and a protective member that protrudes further downward from the lower end of the engine component is provided. When the vehicle body is tilted, when the unit swing type power unit swings up and down, the protective member directly contacts the curb of the road before the engine parts directly contact the curb of the road. Is possible.

  Hereinafter, embodiments of the saddle riding type vehicle and the scooter type motorcycle of the present invention will be described. However, the present invention is not limited to this embodiment. The embodiment of the present invention shows the most preferable mode of the present invention, and the terminology of the present invention is not limited to this.

  1 is a side view of a scooter type motorcycle, FIG. 2 is a plan view of a scooter type motorcycle, FIG. 3 is a side view of a unit swing type power unit, FIG. 4 is a front view of the unit swing type power unit, and FIG. 6 is a cross-sectional view of the rear side portion of the unit swing-type power unit, FIG. 7 is a cross-sectional view of the crankshaft portion of the unit swing-type power unit, and FIG. 8 is a cross-sectional view of the chain chamber. 9 is a side view of the unit swing type power unit with the case cover removed, FIG. 9 is a side view of the unit swing type power unit in which a part of the engine portion is omitted in cross section, and FIG. 10 is a side view of the unit swing type power unit showing the protection member. 11 is a front view of the left case, FIG. 12 is a side view of the right case, and FIG. 13 is a front view of the right case.

  In these drawings, reference numeral 1 denotes a saddle-ride type vehicle, and in this embodiment, a scooter type motorcycle equipped with a four-cycle engine. As shown in FIGS. 1 to 4, the motorcycle 1 includes a vehicle body 8, a front wheel 2, and a rear wheel 3, and has a structure in which the rear wheel 3 is driven by a unit swing type power unit 4. The unit swing type power unit 4 includes a water-cooled four-cycle single-cylinder engine 5 and a transmission case 6 that is integrally formed with the engine 5 and extends rearward on the left side of the rear wheel 3.

  The unit swing type power unit 4 is connected to the vehicle body 8 by a link mechanism 7 so as to be swingable in the vertical direction, and the rear wheel 3 is supported at the rear end portion of the transmission case 6. A cushion unit 9 is interposed between the rear end portion of the transmission case 6 and the vehicle body 8. The transmission case 6 is located on the left side of the rear wheel 3.

  An intake pipe 20 is connected to the upper side of the engine 5, the intake pipe 20 extends rearward, a carburetor 21 is connected to the intake pipe 20, and an air cleaner 23 is connected to the carburetor 21 via a flexible pipe 22. It is connected. The air cleaner 23 is disposed above the transmission case 6 of the unit swing type power unit 4.

  An exhaust pipe 30 is connected to the lower side of the engine 5, and the exhaust pipe 30 is bent from the lower side of the cylinder of the engine 5 to the right side and extends rearward. A muffler 31 is connected to the exhaust pipe 30. The muffler 31 is disposed on the right side of the rear wheel 3.

  Next, the unit swing type power unit 4 will be described with reference to FIGS. The engine 5 includes a crankcase 50, a cylinder block 51, a cylinder head 52, and a cover cap 53. The crankcase 50 includes left and right side cases 50a and 50b. The transmission case 6 has an inner case 60a and an outer case 60b. The inner case 60a is formed integrally with the left case 50b, and a rear wheel support case 61 is assembled to the inner case 60a. The rear wheel 3 axle 40 is formed by the rear wheel support case 61 and the rear portion 60a1 of the inner case 60a. Support.

  As shown in FIGS. 5, 6, and 8, the rear wheel support case 61 is assembled by placing the rear wheel support case 61 against the inner side of the vehicle body of the inner case 60 a, and attaching one tightening bolt 100 from the inner side of the vehicle body. It is inserted into the mounting portion 61a of the wheel support case 61, screwed into the mounting screw portion 60a2 of the inner case 60a, and temporarily fixed. Then, the six tightening bolts 101 are inserted from the outside of the vehicle body into the mounting portion 60a11 of the rear portion 60a1 of the inner case 60a and screwed to the mounting screw portion 61b of the rear wheel support case 61 to be fastened and fixed. Thereafter, the temporarily tightened one fastening bolt 100 is screwed to the mounting screw portion 60a2 to be fastened and fixed.

  A power transmission device 62 that transmits the power of the engine 5 to the rear wheel 3 is housed inside the inner case 60 a and the outer case 60 b of the transmission case 6. The power transmission device 62 includes a V-belt type automatic transmission 63, a centrifugal clutch 64, a gear type reduction gear 65, and the like. A kick type starter 66 is provided on the outer case 60 b of the transmission case 6.

  As shown in FIGS. 5 and 7, the left and right cases 50 a and 50 b of the engine 5 are fastened and fixed by fastening bolts 102. Support portions 50a10 and 50b10 are formed in the left and right cases 50a and 50b. The support shaft 103 is inserted into the support portions 50a10 and 50b10 and is supported by the vehicle body 8. A crankshaft 54 is pivotally supported on the left and right cases 50a and 50b, a generator 55 is provided at one end, and an input side of a V-belt type automatic transmission 63 is provided at the other end.

  Further, the right case 50a is provided with a starter motor 104, and the crankshaft 54 is driven via a drive gear 106 and a one-way clutch 107 provided on the crankshaft 54 via an output gear 105 of the starter motor 104. It has become.

  The left case 50b is formed integrally with the inner case 60a. The cylinder head 52 and the cylinder block 51 are assembled integrally with the left and right cases 50 a and 50 b, and a piston 58 provided to the cylinder block 51 so as to reciprocate is connected to the crankshaft 54 via a connecting rod 59.

  A combustion chamber 70 is formed between the head of the piston 58 and the cylinder head 52, and a spark plug 71 is provided in the cylinder head 52 so as to face the combustion chamber 70. An intake passage 72 and an exhaust passage 73 are formed in the cylinder head 52 in communication with the combustion chamber 70. The intake passage 72 is opened and closed by an intake valve 74, and the exhaust passage 73 is opened and closed by an exhaust valve 75.

  The intake valve 74 and the exhaust valve 75 are driven by a valve mechanism 80. The cam shaft 81 of the valve mechanism 80 is pivotally supported on the upper portion of the cylinder head 52, and the cam shaft 81 is provided with cams 82a and 82b. As the cam shaft 81 rotates, the cam 82a operates the intake valve 74 through the rocker arm 83a, and the cam 82b operates the exhaust valve 75 through the rocker arm 83b.

  A hole-like chain chamber 83 that continues between the left case 50b, the cylinder block 51, the cylinder head 52, and the cylinder head cover 99 of the engine 5 is formed in parallel with the cylinder axis L1. The end of the crankshaft 54 protrudes, and a drive sprocket 84 is attached to the protruding portion.

  An end portion of the cam shaft 81 protrudes into the chain chamber 83, and a driven sprocket 85 is attached to this end portion. A cam chain 86 is wound between the driven sprocket 85 and the drive sprocket 84, and is driven to rotate in the same direction as the drive sprocket 84 by the cam chain 86. A cooling pump 98 is provided on the cam shaft 81 and is driven by the cam shaft 81.

  In the cam chain 86, a chain tensioner 87 is pressed from the outside on the slack side in order to take up slack between the drive sprocket 84 and the driven sprocket 85. The chain tensioner 87 is fitted with a support portion 87a at one end into a recess 50b1 formed in the wall portion of the left case 50b and is supported as a fulcrum. 86 to be pushed.

  A chain guide 89 is pressed against the opposite side of the chain tensioner 87 that is the pulling side of the cam chain 86. As shown in FIG. 8, the chain guide 89 protrudes so that the intermediate sliding contact surface 89a is pressed against the cam chain 89 and is bent in a substantially arcuate shape, and the opposite surface of the sliding contact surface 89a is the back portion 89b. It has become.

  One end of the chain guide 89 forms a sliding end 89c and is fitted and supported by a support recess 50b2 formed in the chain chamber 83 of the left case 50b. The other end 89 d of the chain guide 89 is a free end, and a pair of left and right protrusions 89 e are provided in the vicinity thereof, and are fixed by a pair of left and right fitting recesses 51 a provided in the cylinder block 51.

  The scooter type motorcycle 1 of this embodiment includes a unit swing type power unit 4, and as shown in FIGS. 2 and 10, the exhaust pipe 30 bends from the lower side of the cylinder 5a of the engine 5 to the side and moves backward. It is provided to extend. The exhaust pipe 30 is provided with an exhaust pipe protection plate 120 as a protection member so as to protect the lower part 30b from the front side 30a of the exhaust pipe 30 in the traveling direction. The exhaust pipe protection plate 120 is made of an iron material.

  As shown in FIGS. 2 and 10 to 13, the left and right cases 50 a and 50 b constituting the crankcase 50 are provided with protective members A from the front side in the traveling direction to the lower part. This protective member A has a central protective guide 123 provided at the approximate center in the vehicle width direction, and a right protective guide 121 and a left protective guide 122 provided on the front side portion of the central protective guide 123.

  In this embodiment, the right and left side cases 50a and 50b, the right side protection guide 121, and the left side protection guide 122 are integrally formed of an aluminum material, and the right side protection guide 121 and the left side protection guide are formed from the front side to the lower side in the traveling direction of the crankcase 50. 122 is integrally formed.

  The crankcase 50 of the engine 5 is provided with oil pans 50a20 and 50b20 in the left and right side cases 50a and 50b, and is stored in the oil pans 50a20 and 50b20. The drain pan 130a and the drain bolt 130b for discharging the drain accumulated in the oil pans 50a20 and 50b20 are provided, and the central protective guide 123 is formed so as to cover the periphery of the drain bolt 130b, thereby preventing damage around the drain bolt 130b. Since the central protective guide 123 has a curved surface-shaped part that rises forward, the impact on the central protective guide 123 can be weakened.

  As shown in FIGS. 12 and 13, the right protection guide 121 has a curved surface portion that rises forward, so that the impact on the right protection guide 121 can be weakened.

  As shown in FIGS. 12 and 13, the left protection guide 122 has an upwardly curved surface shape portion, so that the impact on the left protection guide 122 can be weakened.

  The central protection guide 123 is formed so as to cover the front side, the lower side, and the rear side of the drain bolt 130b, and can more reliably prevent the periphery of the drain bolt from contacting the curb stone 150, the speed breaker, and the like of the road. .

  Thus, on both sides of the vehicle 5 in the vehicle width direction, the exhaust pipe protection plate 120 that is a pair of left and right protection members that protect the lower part from the front side in the traveling direction, the right side protection guide 121 and the left side protection guide 122 are formed. For example, even when turning or when the vehicle body is tilted, the exhaust pipe protection plate 120 of the pair of left and right protection members, the right protection guide 121 and the left protection guide 122 are in contact with the curb 150 of the road, the speed breaker, etc. 5 can be protected with a simple structure.

  Further, as shown in FIG. 10, the distance between the exhaust pipe protection plate 120 and the road surface 140 is D1, and the right protection guide 121 and the left protection guide 122 are distances D2 from the road surface 140, and the exhaust pipe protection plate 120. Is disposed at a lower position close to the road surface 140. The exhaust pipe protection plate 120 made of iron material comes into contact with the curb 150 of the road, the speed breaker, etc. before the right side protection guide 121 and the left side protection guide 122 made of aluminum material, so that the impact of the protection guides 121 and 122 is reduced. It is weakening.

  2 and 10, the exhaust pipe protection plate 120 is disposed in front of the protection guides 121 and 122, and the exhaust pipe protection plate 120 made of iron material is a right side protection guide 121 made of aluminum material. The impact of the right protection guide 121 and the left protection guide 122 is weakened by contacting the curb 150 of the road, the speed breaker, etc. before the left protection guide 122.

  In this way, the engine 5 is provided with the protective member A that protrudes further downward from the lower end of the engine component that protrudes downward from the lower end of the cylinder. The engine 5 can be protected because it directly contacts the curb 150 and the like before the engine 5.

  The engine parts are the oil pans 50a20 and 50b20 provided at the lower part of the crankcase 50 of the engine 5, so that the oil pan oil pans 50a20 and 50b20 can be effectively protected.

  This protective member A has a central protective guide 123 provided substantially in the center in the vehicle width direction, and a right-side protective guide 121 and a left-side protective guide 122 provided on the front side portion of the central protective guide 123, so that the part is in direct contact. Can be thickened and strong protection is possible.

  Further, the crankcase 50 includes a right case 50a and a left case 50b, and the right protective guide 121 and the left protective guide 122 are formed in the respective oil pan portions, so that the left and right protective guides 121 and 122 can be easily manufactured. It is. Further, the engine part is an exhaust pipe 30 extending from the lower side of the cylinder 5a of the engine 5 to one side in the vehicle body width direction, so that when the vehicle is turned or the vehicle body is tilted, the right protective guide 121 and the left protective member 121 Protection is possible with any of the protection guides 122, and the exhaust pipe 30 can be effectively protected.

  The scooter type motorcycle 1 of this embodiment includes an exhaust pipe protection plate 120 that protects the exhaust pipe 30, and the exhaust pipe protection plate 120 has a right side protection guide 121 and a left side protection guide 122 that have lower ends formed in an oil pan portion. Since the exhaust pipe protection plate 120 comes into contact with the curb stone 150 and the like before the right protection guide 121 and the left protection guide 122, the oil pan can be effectively protected.

  Further, the exhaust pipe protection plate 120 is disposed in front of the lower ends of the right side protection guide 121 and the left side protection guide 122 formed in the oil pan portion, so that the exhaust pipe protection plate 120 is ahead of the right side protection guide 121 and the left side protection guide 122. The oil pan can be effectively protected by contacting the curb 150 or the like.

  Further, the exhaust pipe protection plate 120 is made of iron material, and the right side protection guide 121 and the left side protection guide 122 are made of aluminum material. Therefore, the exhaust pipe protection plate 120 made of iron material is made of the right side protection guide 121 and left side protection made of aluminum material. The oil pan can be protected by contacting before the guide 122.

  Further, the engine 5 includes an engine part attached to the engine 5 that protrudes downward from the lower end of the cylinder 5a, and a protective member A that protrudes further downward from the lower end of the engine part is provided, so that the vehicle body is tilted when turning. When the support unit 103 swings up and down as shown in FIGS. 3 and 10, the unit swing type power unit 4 is protected before the engine parts directly contact the road curb 150 or the like. The member A directly contacts the curb 150 of the road and the engine 5 can be protected.

  The present invention can be applied to a straddle-type vehicle and a scooter-type motorcycle including an engine and a transmission unit that supports the rear wheel at the rear end and transmits the driving force of the engine to the rear wheel.

1 is a side view of a scooter type motorcycle. FIG. 1 is a plan view of a scooter type motorcycle. FIG. It is a side view of a unit swing type power unit. It is a front view of a unit swing type power unit. It is sectional drawing of a unit swing type power unit. It is sectional drawing of the rear side part of a unit swing type power unit. It is sectional drawing of the crankshaft part of a unit swing type power unit. It is a side view of a unit swing type power unit with a chain chamber shown in cross section and a transmission case cover removed. It is a side view of the unit swing type power unit which abbreviate | omitted one part which shows an engine part in a cross section. It is a side view of a unit swing type power unit which shows a protection member. It is a front view of a left side case. It is a side view of a right case. It is a front view of a right case.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Scooter type motorcycle 4 Unit swing type power unit 5 Engine 6 Transmission case 30 Exhaust pipe 50a Right side case 50b Left side case 120 Exhaust pipe protection plate 121 Right side protection guide 122 Left side protection guide 123 Central protection guide

Claims (11)

In a straddle-type vehicle including an engine and a transmission unit that supports a rear wheel at a rear end and transmits a driving force of the engine to the rear wheel,
The engine includes an engine component attached to an engine protruding downward from a lower end of a cylinder,
A straddle-type vehicle provided with a protective member that protrudes further downward from a lower end of the engine component. The straddle-type vehicle according to claim 1, wherein the engine component is an oil pan provided at a lower portion of a crankcase of the engine. The said protection member has the center protection guide provided in the approximate center of the vehicle width direction, and the right side protection guide and left side protection guide provided in the front side part of the center protection guide, The Claim 1 or Claim 2 characterized by the above-mentioned. The saddle riding type vehicle described in 1. 4. The straddle-type vehicle according to claim 3, wherein the crankcase includes a right case and a left case, and a right protective guide and a left protective guide are formed in each oil pan portion. The straddle-type vehicle according to any one of claims 1 to 4, wherein the engine component is an exhaust pipe extending from a lower side of a cylinder of the engine to one side in a vehicle body width direction. An exhaust pipe protection plate for protecting the exhaust pipe;
6. The straddle-type vehicle according to claim 5, wherein the exhaust pipe protection plate is disposed in front of a right protection guide having a lower end formed in an oil pan portion and a lower end of the left protection guide. The straddle-type vehicle according to claim 5 or 6, wherein the exhaust pipe protection plate is disposed in front of lower ends of a right protection guide and a left protection guide formed in an oil pan portion. The straddle-type vehicle according to any one of claims 1 to 4, wherein the protective member has a curved surface portion that rises forward. The exhaust pipe protection plate is made of iron material,
The straddle-type vehicle according to claim 5 or 6, wherein the right protective guide and the left protective guide are made of an aluminum material. A drain portion for draining drainage accumulated in the oil pan and a drain bolt;
The straddle-type vehicle according to claim 3, wherein the central protection guide is formed so as to cover the periphery of the drain bolt. A unit swing type power unit including an engine and a transmission unit integrally connected to the engine and supporting a rear wheel at a rear end and transmitting a driving force of the engine to the rear wheel;
In a scooter type motorcycle including a swing support unit that swingably supports the unit swing type power unit on a vehicle body,
The engine includes an engine component attached to an engine protruding downward from a lower end of a cylinder,
A scooter type motorcycle, comprising a protective member that protrudes further downward from a lower end of the engine component.

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