JP2011163191A - Wire routing structure of engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wire routing structure of an engine, preventing deterioration and damage to a signal wire of a position detection sensor that occur due to traveling. <P>SOLUTION: The wire routing structure of the engine 41 includes a crankcase 43 having a wire hole 111 opened in a ceiling wall 43a, a stator 98 provided on the crankcase 43, a rotor 99 provided integrally for rotation with a crankshaft 49 rotatably supported on the crankcase 43 and capable of going around the stator 98, the position detection sensor 112 provided on the crankcase 43 and detecting rotation speed of the rotor 99, a cooling cowling 102 provided on the crankcase 43 and covering the stator 98, the rotor 99 and the position detection sensor 112, and the signal wire 113 electrically connected to the position detection sensor 112 and routed to the outside of the cooling cowling 102 through the wire hole 111. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an engine wiring structure, and more particularly, to a signal line wiring structure provided in an engine and connected to a position detection sensor that detects the rotational speed of the engine.

  For example, a scooter type motorcycle includes a power unit having an engine, a continuously variable transmission, and a deceleration transmission mechanism. This power unit drives the drive wheels by transmitting power in the order of the engine, continuously variable transmission, and deceleration transmission mechanism.

  2. Description of the Related Art Conventionally, an engine generator including a stator fixed to a crankcase and a rotor fixed to a crankshaft and capable of rotating around the stator is known. An engine equipped with such a generator includes a position detection sensor opposed to the outer peripheral surface of the rotor, detects the rotational speed of the rotor, and calculates the rotational speed of the engine. The position detection sensor is disposed below the rotor. A signal line for transmitting a detection result from the position detection sensor to a computer that calculates the engine speed is routed outside the engine from an opening provided below the crankcase (see, for example, Patent Document 1).

JP-A-8-154354

  In the structure in which the signal line connected to the position detection sensor is routed from the lower side of the crankcase, like the engine described in Patent Document 1, water or pebbles that fly up from the wheel or the like when traveling are scattered. There was a problem that the signal line was exposed. If the signal line is exposed to water or flying objects, its deterioration will be accelerated. Further, if the signal line is damaged, there is a possibility that the output of the position detection sensor cannot be obtained and the engine speed cannot be calculated.

  In view of this, the present invention proposes an engine routing structure that can prevent deterioration and damage associated with traveling of the signal line of the position detection sensor.

  In order to solve the above problems, an engine routing structure according to the present invention includes a crankcase having a wiring hole opened in a ceiling wall, a stator provided in the crankcase, and a pivot supported by the crankcase. A rotor provided integrally with the crankshaft and capable of rotating around the stator; a position detection sensor provided on the crankcase for detecting the rotational speed of the rotor; and provided on the crankcase. A cowling covering the stator, the rotor and the position detection sensor; and a signal line electrically connected to the position detection sensor and routed outside the cowling from the wiring hole. To do.

  ADVANTAGE OF THE INVENTION According to this invention, the engine wiring structure which can prevent the deterioration and damage accompanying driving | running | working of the signal wire | line of a position detection sensor can be provided.

1 is a left side perspective view showing a scooter-type motorcycle having an engine routing structure according to an embodiment of the present invention. The right view which showed the power unit provided with the engine wiring structure which concerns on embodiment of this invention. The top view which showed the power unit provided with the engine wiring structure which concerns on embodiment of this invention. Sectional drawing in the IV-IV line of FIG. 2 which showed the power unit provided with the engine wiring structure which concerns on embodiment of this invention. Sectional drawing in the VV line | wire of FIG. 2 which showed the generator of the power unit provided with the engine wiring structure which concerns on embodiment of this invention. The perspective view which showed the front half part of the power unit provided with the engine wiring structure which concerns on embodiment of this invention. The perspective view which showed the front half part of the power unit provided with the engine wiring structure which concerns on embodiment of this invention.

  Embodiments of an engine routing structure according to the present invention will be described below with reference to FIGS.

  FIG. 1 is a left side perspective view showing a scooter type motorcycle having an engine routing structure according to an embodiment of the present invention.

  In describing the structure of the motorcycle 1, the solid arrow F in FIG. 1 is defined as the front, and the solid arrow R in FIG. 1 is defined as the rear. Regarding the left and right, when the rider of the motorcycle 1 looks forward, the left hand side of the rider is defined as the left side of the motorcycle 1 and the opposite side as the right side of the motorcycle 1. With respect to up and down, the rider's head side is defined as the upper side of the motorcycle 1 and the opposite side is defined as the lower side of the motorcycle 1. The direction of each part constituting the motorcycle 1 is the same as that of the motorcycle 1.

  As shown in FIG. 1, the motorcycle 1 includes a steel pipe body frame 3, a front fork 4 that is pivotally supported by the body frame 3 so as to be rotatable left and right, a front wheel 5 that is pivotally supported by the front fork 4, A power unit 6 that is pivotally supported by the body frame 3 so as to be swingable up and down, a rear wheel 7 that is pivotally supported by the power unit 6, a shock absorber 8 that buffers and restores the swing of the power unit 6 and the rear wheel 7, and a power unit 6 An air intake device 9 disposed in the front upper portion of the power unit 6, an air cleaner 11 disposed in the rear upper portion of the power unit 6, a seating seat 12 provided in the vehicle body frame 3, and an article storage box 13 closed by the seating seat 12. The fuel tank 15 disposed behind the article storage box 13, the front frame cover 16 covering the body frame 3, and the rear frame It includes a Mukaba 17, a.

  The vehicle body frame 3 includes a head pipe 21 positioned at the frontal head, a down pipe 22 extending rearward and downward from the head pipe 21, and left and right extending obliquely upward and rearward from the vicinity of the rear end of the down pipe 22. A pair of rear pipes 23, a step frame 24 disposed at a portion where the down pipe 22 is inserted downward, and an engine bracket 25 provided in the vicinity of the joint between the down pipe 22 and the rear pipe 23 are provided. The head pipe 21 pivotally supports the handle bar 27, the head lamp 28, and the front fender 29 so as to be rotatable left and right. The engine bracket 25 is connected to the power unit 6 via a link 31.

  The power unit 6 swings up and down around the pivot shaft 32 installed at the rear end of the link 31 together with the rear wheel 7 and functions as a swing arm of the rear wheel 7.

  The shock absorber 8 is connected between the rear part of the rear pipe 23 and the rear part of the power unit 6.

  The seating sheet 12 is installed above the article storage box 13 so as to close the opening. The seating seat 12 opens the opening of the article storage box 13 by lifting the rear end around the hinge portion 33 at the front end.

The article storage box 13 is a bottomed box-shaped container that opens upward, and is installed above the rear pipe 23.
The fuel tank 15 includes an oil supply portion 35 that passes through a tray portion 34 extending rearward from the upper edge of the article storage box 13 and faces upward.
The front frame cover 16 is a resin cover that covers the front portion of the vehicle body frame 3.

The rear frame cover 17 is a resin cover that covers the rear portion of the vehicle body frame 3.
The motorcycle 1 includes a tail lamp 36 provided at the rear end of the rear frame cover 17, a rear fender 37 provided above the rear wheel 7, and a resin step board disposed above the step frame 24. 38.
The front frame cover 16, the rear frame cover 17, and the step board 38 are continuously connected.

FIG. 2 is a right side view showing a power unit having an engine routing structure according to an embodiment of the present invention. FIG. 3 is a plan view showing a power unit having an engine routing structure according to an embodiment of the present invention.
4 is a cross-sectional view taken along line IV-IV in FIG. 2 showing a power unit having an engine routing structure according to an embodiment of the present invention.

  As shown in FIGS. 2 to 4, the power unit 6 of the motorcycle 1 includes an integrated engine 41 and a transmission unit 42, and has a general layout for a scooter type motorcycle.

  The engine 41 is, for example, a forced air-cooled four-cycle engine, and includes a crankcase 43, a single-cylinder cylinder assembly 44 that is provided in front of the crankcase 43 and arranged to be inclined substantially horizontally, A transmission unit 42 provided on the left side and extended rearward, and a generator 45 provided on the right side of the crankcase 43 are provided.

  The crankcase 43 is configured by combining a left case half 47 and a right case half 48 which are divided into left and right. The crankcase 43 pivotally supports a crankshaft 49 having a rotation shaft along the vehicle width direction (left-right direction). Both ends of the crankshaft 49 protrude to the left and right of the crankcase 43, respectively.

  The cylinder assembly 44 includes a cylinder block 51 provided in front of the crankcase 43, a cylinder head 52 provided in front of the cylinder block 51, and a head cover 53 provided in front of the cylinder head 52. The cylinder block 51 has an inner peripheral surface that defines a cylinder bore 55, and the cylinder head 52 has an inner peripheral surface that defines a combustion chamber 56 aligned with the cylinder bore 55.

  The cylinder assembly 44 includes a piston 57 that can reciprocate inside the cylinder bore 55, a connecting rod 59 that is connected to the piston 57 and the crank pin 58 of the crankshaft 49, and a combustion chamber 56 that is attached to the cylinder head 52. A spark plug 60 facing the cam shaft 61 supported in the vehicle width direction (left-right direction) inside the cylinder head 52, a cam drive sprocket 62 provided on the crankshaft 49, and a cam provided on the cam shaft 61 A driven sprocket 63; and an endless cam chain 64 wound between the cam drive sprocket 62 and the cam driven sprocket 63 through the cylinder block 51 and the cylinder head 52.

  The cylinder assembly 44 converts the reciprocating motion of the piston 57 into the rotational motion of the crankshaft 49 by the connecting rod 59.

  The rotation of the crankshaft 49 is decelerated to 1/2 and transmitted to the camshaft 61 by the cam drive sprocket 62 and the cam driven sprocket 63. The rotation of the cam shaft 61 opens and closes an intake valve (not shown) and an exhaust valve (not shown) at predetermined timings via an intake cam 66 and an exhaust cam 67 formed on the cam shaft 61 and a rocker arm 68. Let

  The cam chain 64 is accommodated in a cam chain chamber 69 defined on the left side of the cylinder block 51, the cylinder head 52 and the head cover 53.

  The transmission unit 42 includes a transmission case 71 provided on the left side of the left case half 47 and extending rearward, and a belt-type transmission 72 and a reduction transmission mechanism 73 housed in the transmission case 71. The transmission case 71 includes a transmission case main body 74 that is integrally formed with the left case half body 47, and a transmission case cover 75 that closes the left opening of the transmission case main body 74.

  The transmission unit 42 includes a driven shaft 77 that is pivotally supported at the rear of the transmission case body 74 and the transmission case cover 75, and an intermediate shaft 78 that is disposed below the driven shaft 77 and is pivotally supported by the mission cover 97. A rear wheel shaft 79 disposed on the rear upper side of the intermediate shaft 78 and supported by the transmission case main body 74 and the transmission cover 97. The rear wheel shaft 79 protrudes from the right side surface of the transmission case cover 75. The rear wheel 7 is attached to the projecting portion of the rear wheel shaft 79 so as to rotate integrally. The crankshaft 49 also serves as the drive shaft of the transmission unit 42.

  The belt-type transmission 72 is housed in a transmission case 71, and is provided on a drive pulley 81 and a driven shaft 77 provided integrally with the left end of a crankshaft 49 extending inside the transmission case 71. A driven pulley 82, an endless V-belt 83 wound around the pulleys 81, 82, and a centrifugal clutch 84 arranged in parallel on the left side of the driven pulley 82. In the belt-type transmission 72, the drive pulley 81 expands the effective diameter by increasing the centrifugal force accompanying the rotation of the crankshaft 49, while the driven pulley 82 reduces the effective diameter to steplessly rotate the crankshaft 49. Are automatically shifted (accelerated) and transmitted to the driven shaft 77.

  The drive pulley 81 includes a fixed pulley half 86 and a movable pulley half 87 facing each other. The side surfaces of the fixed pulley half 86 and the movable pulley half 87 facing each other form a belt groove.

  The fixed pulley half 86 is formed of steel and is fixed to the crankshaft 49. On the other hand, the movable pulley half 87 is movable in the perspective direction with respect to the fixed pulley half 86. The movable pulley half 87 includes a movable pulley housing 88 having a side surface facing the fixed pulley half 86, a fixed plate 89 positioned on the left side of the movable pulley housing 88 and fixed to the crankshaft 49, and a movable pulley housing. And a weight roller 90 disposed between the fixing plate 89 and the fixing plate 89. The movable pulley housing 88 is configured to be movable in the axial direction of the crankshaft 49. The movable pulley half 87 moves the weight roller 90 to the outer peripheral side of the movable pulley housing 88 and the fixed plate 89 by the centrifugal force generated by the rotation of the crankshaft 49 so that the movable pulley housing 88 approaches the fixed pulley half 86.

  The driven pulley 82 also includes a fixed pulley half 91 and a movable pulley half 92 that face each other. The side surfaces of the fixed pulley half 91 and the movable pulley half 92 facing each other form a belt groove.

  The fixed pulley half 91 is fixed to the driven shaft 77 so that the relative movement in the rotation axis direction is impossible. On the other hand, the movable pulley half 92 is movable in the perspective direction with respect to the fixed pulley half 91.

  When the rotational speed of the driven pulley 82 reaches a predetermined rotational speed or more, the centrifugal clutch 84 causes the driven shaft 77 and the driven pulley 82 to frictionally engage with each other.

  The reduction transmission mechanism 73 includes a primary drive gear 93 provided near the right end of the driven shaft 77, a primary driven gear 94 provided on the intermediate shaft 78 and meshed with the primary drive gear 93, and a second drive gear 93 provided on the intermediate shaft 78. And a secondary driven gear 96 provided on the rear wheel shaft 79 and meshed with the secondary drive gear 95. These four gears 93, 94, 95, and 96 are liquid-tightly isolated by a mission cover 97 attached to the rear portion of the transmission case main body 74 and immersed in lubricating oil. The mission cover 97 is combined with the transmission case main body 74 at the dividing plane P (FIG. 4).

  The generator 45 includes a stator 98 fixed to the crankcase 43 (the right case half body 48), and a rotor 99 provided integrally with the crankshaft 49 at the right end. The generator 45 generates electricity by rotating the rotor 99 around the stator 98 by the rotation of the crankshaft 49.

  The engine 41 transmits the rotation of the crankshaft 49 due to the operation of the cylinder assembly 44 to the driven shaft 77 through the drive pulley 81, the V belt 83, the driven pulley 82, and the centrifugal clutch 84 in order, and the rotation of the driven shaft 77 is decelerated. The speed is reduced by the mechanism 73 and transmitted to the rear wheel shaft 79 and the rear wheel 7.

  The engine 41 also generates an engine cooling fan 101 that generates cooling air for the cylinder assembly 44, a resin cooling cowling 102 that covers the right side of the cylinder assembly 44 and the crankcase 43, and cooling air for the belt-type transmission 72. A transmission cooling fan 103 (impeller).

  The engine cooling fan 101 is fixed to the right end portion of the crankshaft 49, more specifically, to the rotor 99 of the generator 45, and rotates together with the rotor 99 as the crankshaft 49 rotates.

  The cooling cowling 102 has a cooling air intake port 104 opened on the right side of the engine cooling fan 101, and a cooling air discharge port (not shown) opened below the cylinder assembly 44.

  The transmission cooling fan 103 is juxtaposed to the left end of the crankshaft 49, more specifically the left side of the drive pulley 81, and is fixed to the crankshaft 49, and rotates together with the drive pulley 81 as the crankshaft 49 rotates. .

  The engine 41 rotates the engine cooling fan 101 and sucks air from the cooling air intake port 104, and uses the air discharged from the engine cooling fan 101 as cooling air to flow in the internal space of the cooling cowling 102 so that the cylinder assembly 44 is The cooling air is forcibly cooled and the heated cooling air is discharged from the cooling air outlet. Further, the engine 41 rotates the transmission cooling fan 103 to suck in air from the cooling air suction port 106 opened in the transmission case cover 75, and uses the air discharged from the transmission cooling fan 103 as cooling air for the transmission case. The belt-type transmission 72 is cooled by flowing through the internal space 71, and the warmed cooling air is discharged from the cooling air discharge port 107 opened in the transmission case cover 75.

Next, the wiring structure of the engine 41 of the power unit 6 will be described.
5 is a cross-sectional view taken along the line V-V in FIG. 2 showing a generator of a power unit having an engine routing structure according to an embodiment of the present invention.

  6 and 7 are perspective views showing the front half of a power unit having an engine routing structure according to an embodiment of the present invention. FIG. 7 is a view in which a part of the cooling cowling is removed.

  As shown in FIGS. 5 to 7, the engine 41 of the power unit 6 is arranged in a crankcase 43 having a wiring hole 111 opened in the ceiling wall 43 a and a stator 98 of the generator 45 provided in the crankcase 43. (Stator), a rotor 99 (rotor) that is provided integrally with the crankshaft 49 that is pivotally supported by the crankcase 43 and that can rotate around the stator 98, and a rotation of the rotor 99 that is provided on the crankcase 43. A position detection sensor 112 for detecting speed, a cooling cowling 102 provided on the crankcase 43 and covering the stator 98, the rotor 99 and the position detection sensor 112, and a cooling cowling electrically connected to the position detection sensor 112 and from the wiring hole 111 Signal line 113 routed outside 102.

  The ceiling wall 43 a of the crankcase 43 is a wall disposed on the upper side of the motorcycle 1 among the walls forming the crankcase 43. The ceiling wall 43a is a part of a wall defining the crank chamber 114 in which the crankshaft 49 is accommodated, and includes a transmission chamber 115 in which the belt-type transmission 72 is accommodated and a generator chamber 117 in which the generator 45 is accommodated. It is also part of the wall that partitions with the cooling cowling 102. The wiring hole 111 of the crankcase 43 is formed by recessing a part of the ceiling wall 43a that defines the generator chamber 117 toward the center in the vehicle width direction (left-right direction). On the other hand, the crankcase 43 has a thick part 119 formed by raising the peripheral edge of the wiring hole 111 from the general part of the ceiling wall 43a.

  The position detection sensor 112 is installed on a pair of bosses 121 projecting from the crankcase 43 into the generator chamber 117 and is disposed to face the outer peripheral surface 99 a of the rotor 99. The position detection sensor 112 is a detector that detects protrusions 99b provided at a predetermined interval on the outer peripheral surface 99a of the rotor 99, and the rotational speed of the engine 41 is calculated by an appropriate device based on the detection result.

  The boss 121 is arranged as close as possible to the ceiling wall 43a of the crankcase 43, more specifically, to the wiring hole 111. Accordingly, the position detection sensor 112 is arranged as close as possible to the ceiling wall 43a of the crankcase 43, and more specifically, to the wiring hole 111.

  The signal line 113 guides the detection result of the position detection sensor 112 to a computer (not shown) provided at an appropriate position of the motorcycle 1. First, the signal line 113 is appropriately routed from the position detection sensor 112 through the generator chamber 117 to the wiring hole 111. Specifically, the signal line 113 is extended upward from the position detection sensor 112 and reaches the wiring hole 111. The signal line 113 is routed outside the cooling cowling 102 via a grommet 122 disposed in the wiring hole 111 and sandwiched between the crankcase 43 and the cooling cowling 102.

  The generator 45 circulates the rotor 99 around the stator 98 and generates an induced electromotive force in the stator 98. This induced electromotive force is guided from the generator 45 to each part of the motorcycle 1 by a power line 123 electrically connected to the stator 98. First, the electric power line 123 is routed from the stator 98 to the upper surface of the crankcase 43 through the outer surface of the crankcase 43 fixing the stator 98 and passing between the pair of bosses 121. The power line 123 is bundled with the signal line 113 of the position detection sensor 112 in the vicinity of the wiring hole 111 and reaches the wiring hole 111 together with the signal line 113. The power line 123 is routed outside the cooling cowling 102 via a grommet 122 provided in the wiring hole 111.

  In the wiring structure of the engine 41 according to the present embodiment, the signal line 113 of the position detection sensor 112 can be pulled out of the cooling cowling 102 from above the crankcase 43, so that it jumps up to the front wheels 5 and the rear wheels 7 during traveling. The signal line 113 is not exposed to scattered water or pebbles.

  In addition, the wiring structure of the engine 41 according to the present embodiment allows the power line 123 of the generator 45 together with the signal line 113 of the position detection sensor 112 to be drawn out of the cooling cowling 102 from the wiring hole 111. Therefore, the signal line 113 and the power line The workability of 123 routing can be improved.

Further, since the routing structure of the engine 41 according to the present embodiment has the thick wall portion 119 around the wiring hole 111, the rigidity of the wiring hole 111 is improved, and a signal due to vibration caused by the operation of the engine 41 or the like. Damage to the line 113 and the power line 123 can be prevented.
Therefore, according to the routing structure of the engine 41 according to the present embodiment, it is possible to prevent deterioration and damage associated with traveling of the signal line 113 of the position detection sensor 112.

DESCRIPTION OF SYMBOLS 1 Motorcycle 3 Body frame 4 Front fork 5 Front wheel 6 Power unit 7 Rear wheel 8 Shock absorber 9 Intake device 11 Air cleaner 12 Seating sheet 13 Article storage box 15 Fuel tank 16 Front frame cover 17 Rear frame cover 21 Head pipe 22 Down pipe 23 Rear pipe 24 Step frame 25 Engine bracket 27 Handle bar 28 Front lamp 29 Front fender 31 Link 32 Pivot shaft 33 Hinge part 34 Tray part 35 Refueling part 36 Tail lamp 37 Rear fender 38 Step board 41 Engine 42 Transmission unit 43 Crankcase 43a Ceiling wall 44 Cylinder assembly 45 Generator 47 Left case half 48 Right case half 49 Crankshaft 51 Cylinder block 52 Cylinder head 53 Head cover 55 Cylinder bore 56 Combustion chamber 57 Piston 58 Crank pin 59 Connecting rod 60 Spark plug 61 Cam shaft 62 Cam drive sprocket 63 Cam driven sprocket 66 Intake cam 67 Exhaust cam 68 Rocker arm 64 Cam chain 69 Cam chain chamber 71 Transmission case 72 Belt transmission 73 Deceleration transmission mechanism 74 Transmission case body 75 Transmission case cover 77 Driven shaft 78 Intermediate shaft 79 Rear wheel shaft 81 Drive pulley 82 Driven pulley 83 V belt 84 Centrifugal clutch 86 Fixed pulley half 86a Starter ring gear 87 Movable Pulley half 88 Movable pulley housing 89 Fixed plate 90 Weight roller 91 Fixed pulley half 91a Anti-belt groove side surface 92 Movable pulley half 93 Primary drive gear 94 Primary driven gear 95 Secondary driven gear 96 Secondary driven gear 97 Mission cover 98 Stator 99 Rotor 99a Outer peripheral surface 99b Projection 101 Engine cooling fan 102 Cooling cowling 103 Transmission cooling fan 105 Transmission cooling fan 104 Cooling air inlet 106 Cooling air inlet 107 Cooling air outlet 111 Wiring hole 112 Position detection sensor 113 Signal line 114 Crank chamber 115 Shift chamber 117 Generator chamber 119 Thick part 121 Boss 122 Grommet 123 Power line

Claims (2)

A crankcase having a wiring hole opened in the ceiling wall;
A stator provided in the crankcase;
A rotor provided integrally with a crankshaft supported by the crankcase and capable of rotating around the stator;
A position detection sensor provided in the crankcase for detecting the rotational speed of the rotor;
A cowling provided on the crankcase and covering the stator, the rotor and the position detection sensor;
An engine routing structure comprising: a signal line electrically connected to the position detection sensor and routed outside the cowling from the wiring hole. 2. The engine routing structure according to claim 1, wherein the crankcase is formed such that a peripheral portion of the wiring hole is raised from a general portion of the ceiling wall.

Images