JP4425646B2 - Auxiliary structure for internal combustion engine - Google Patents

Description

  The present invention relates to an auxiliary machine mounting structure for an internal combustion engine.

  It is necessary to attach auxiliary equipment such as a water pump and an oil pump and an ACG (alternating current generator) to the internal combustion engine. Conventionally, an auxiliary base such as a water pump and an oil pump is attached by attaching an auxiliary machine base to the crankcase, and an ACG stator base is attached by attaching an ACG stator base around the crankcase (for example, patents) Reference 1). That is, since the auxiliary machine base and the ACG stator base are separate bodies, the number of parts is increased and the assembly is not easy. The rotating shaft of the accessory is driven from the crankshaft. However, if the two bases are separate as described above, the distance between the shafts cannot be maintained with high accuracy, and there is a problem such as noise generation. It was.

JP-A-61-279727 (FIG. 1).

  In the present invention, the ACG stator base is integrated with the auxiliary machine base to reduce the number of parts, and the assembly work between the auxiliary machine and the power transmission system is facilitated, and the distance between the shafts is maintained with high accuracy. It is intended to reduce this.

The present invention solves the above-mentioned problems, and the invention according to claim 1 supports and stores the crankshaft, and has a through-hole through which the crankshaft penetrates and an auxiliary machine base mounting surface on one side. crankcase to the accessory base mounting surface of the crankcase and the crankcase provided with a through hole through which the crankshaft comprises an abutment surface to the accessory base mounting surface of the crankcase, the abutting surface with It consists an auxiliary base which is mounted along the auxiliary base is provided with a mounting surface of the stator of the alternator, and a mounting portion of the auxiliary machine driven by the crankshaft, the said crankcase one An intermediate rotating shaft for power transmission of the auxiliary device is supported between a shaft support portion provided on the side and a boss portion provided on a wall portion facing the crankcase of the auxiliary device base. It is accessory mounting structure for an internal combustion engine characterized by.

According to a second aspect of the present invention, there is provided an auxiliary machine mounting structure for an internal combustion engine according to the first aspect, wherein the intermediate shaft for power transmission is in a direction along the crankshaft and the crank web of the crankshaft and the AC generator It is characterized by being arranged between.

According to a third aspect of the present invention, in the auxiliary equipment mounting structure for an internal combustion engine according to the first or second aspect, on the side of the auxiliary equipment base opposite to the side on which the intermediate rotary shaft for power transmission is disposed, An auxiliary machine that rotates with the power transmitted by the intermediate rotating shaft is arranged.
  According to a fourth aspect of the present invention, there is provided the auxiliary equipment mounting structure for an internal combustion engine according to any one of the first to third aspects, wherein the intermediate rotary shaft for power transmission is an oil pump shaft and is connected to a crankshaft. The power input member and the power output member to the auxiliary machine are supported.

  According to the first aspect of the present invention, since the auxiliary machine and the power transmission system are supported by the same member, the number of parts is reduced, the assembly of the auxiliary machine and the power transmission system is easy, and the distance between the shafts. Driving accuracy can be reduced.

According to the invention of claim 3 , since the rigidity balance is good with respect to the reaction force from the power transmission member, the auxiliary equipment mounting structure can be reduced in weight.

The invention of claim 4 is to use both the rotating shaft of a specific auxiliary machine and the rotating shaft for power transmission. By doing so, the arrangement of a plurality of auxiliary machines becomes easy and the space efficiency is improved. The internal combustion engine can be downsized.

  FIG. 1 is a side view of a scooter type motorcycle 1 equipped with an internal combustion engine having an auxiliary machine mounting structure of the present invention. In this motorcycle 1, a head pipe 3 is integrally formed at the front end of a body frame 2, a front fork 4 is fitted to the head pipe 3 so as to be able to turn left and right, and a front wheel 5 is rotatable at the lower end of the front fork 4. Is attached. A power unit 6 is attached to the rear portion of the vehicle body frame 2 so as to be swingable up and down. This rocking power unit 6 is configured by integrating a rocker arm type overhead valve type four-stroke cycle single-cylinder water-cooled internal combustion engine 7, a power transmission device 8, and a rear wheel support portion 9. The rear wheel support portion 9 includes a rear wheel 10. A rear suspension 11 is interposed between the rear part of the vehicle body frame 2 and the rear part of the power unit 6. An article storage section 12 is provided at the rear upper part of the body frame 2, and a seat 13 that covers the upper opening of the article storage section 12 so as to be openable and closable is provided. A fuel tank 15 is disposed below the step floor 14 at the center of the vehicle body. The body frame 2 is covered with a body cover 16.

  FIG. 2 is a longitudinal sectional view of the power unit 6 as viewed from the left, and FIG. 3 is a developed view of a cross section of the power unit 6 with respect to the plane including the cylinder axis, crank shaft, pulley shaft, and gear shaft. The internal combustion engine 7 of this power unit includes a cylinder block 20, a cylinder head 21, a cylinder head cover 22, and a crankcase 23. The cylinder head 21 is coupled to the front end of the cylinder block 20 oriented in a substantially horizontal direction. A cylinder head cover 22 is coupled to the front end of the head 21, and a crankcase 23 is coupled to the rear end of the cylinder block 20. The crankcase 23 includes left and right crankcases 23A and 23B.

  2 and 3, a piston 25 is slidably fitted in a cylinder hole 24 formed in the cylinder block 20, and a crankshaft is mounted on bearings 26 and 27 held in the left and right crankcases 23 </ b> A and 23 </ b> B. 28 is pivotally supported. Both ends of the connecting rod 31 are rotatably attached to the piston 25 and the crankshaft 28 via the piston pin 29 and the crankpin 30, respectively. When the piston 25 reciprocates, the crankshaft 28 is driven to rotate. It has become.

  The power transmission device 8 in the power unit 6 includes a V-belt continuously variable transmission 32 and a gear reducer 33. The main body case of the power transmission device 8 is a right transmission case 40, a left transmission case 41, and a rear wheel support. The case 42 is configured. The right transmission case 40 is manufactured integrally with the left crankcase 23A. The left transmission case 41 is coupled to the right transmission case 40, and the rear wheel support case 42 is coupled to the right transmission case 40.

  The drive shaft of the V-belt type continuously variable transmission 32 is the crankshaft 28 itself, and the drive pulley 43 of the V-belt type continuously variable transmission 32 is provided thereon. The driven shaft 44 of the V-belt type continuously variable transmission 32 is rotatably supported by the right transmission case 40 and the rear wheel support case 42. A driven pulley 46 of the step transmission 32 is provided. An endless V-belt 47 is stretched between the driving pulley 43 and the driven pulley 46. In the V-belt type continuously variable transmission 32, when the crankshaft 28 rotates beyond a predetermined rotational speed, the centrifugal clutch 45 enters a connected state and the driven shaft 44 starts to rotate. When the rotational speed of the crankshaft 28 further increases, the rotational speed of the driven shaft 44 becomes larger than the rotational speed of the crankshaft 28 by the centrifugal force application mechanism of the drive pulley 43.

  The gear reducer 33 is constituted by a gear group provided on three rotating shafts. The first shaft is the driven shaft 44 of the V-belt type continuously variable transmission 32 supported by the right transmission case 40 and the rear wheel support case 42, and a pinion gear 48 is formed. The second shaft is an intermediate shaft 49 that is rotatably supported by the right transmission case 40 and the rear wheel support case 42, and the gear 50 that meshes with the pinion gear 48 of the driven shaft is integrally fitted. In addition, a pinion gear 51 is formed adjacent thereto. The third shaft is a rear wheel shaft 52 rotatably supported by the right transmission case 40 and the rear wheel support case 42, and a gear 53 that meshes with the pinion gear 51 of the intermediate shaft is fitted. . The rear wheel 10 is integrally fixed to the rear wheel shaft 52. With this configuration, the torque of the driven shaft 44 is transmitted to the rear wheel shaft 52 via the pinion gear 48, the gear 50, the intermediate shaft 49, the pinion gear 51, and the gear 53. It has come to decelerate significantly.

  FIG. 4 is a view of a longitudinal section of the internal combustion engine 7 as viewed from the right side. In the figure, arrow F represents the front of the internal combustion engine, and arrow Up represents the upper side. A combustion chamber 60 is formed on the bottom surface of the cylinder head 21 facing the front end portion of the cylinder hole 24 formed in the cylinder block 20. As shown in FIG. 3, a spark plug 86 is attached to the cylinder head 21 from the left side of the internal combustion engine so that the electrode at the tip of the combustion chamber faces the combustion chamber 60. In FIG. 4, an intake port 61 is formed in the upper part of the cylinder head 21, and an exhaust port 62 is formed in the lower part of the cylinder head 21. An intake valve 63 for opening and closing the combustion chamber side opening 61a of the intake port 61 and an exhaust valve 64 for opening and closing the combustion chamber side opening 62a of the exhaust port 62 are slidably fitted to the cylinder head 21, respectively. .

  The downstream end of the intake pipe 65 (FIG. 2) is connected to the outer opening 61b of the intake port 61. An air cleaner 66, a throttle valve 67, and a fuel injection valve 68 are connected to the intake pipe 65 in order from the upstream side (FIG. 2). The upstream end 62b of the exhaust port 62 is connected to the upstream end of the exhaust pipe 69 (FIG. 2), and the downstream end of the exhaust pipe 69 is connected to the muffler 70 (FIGS. 2 and 3). Furthermore, the intake valve 63 and the exhaust valve 64 (FIG. 4) urged in the valve opening direction by the valve spring 71 are disposed in a valve operating chamber 72 formed by the cylinder head 21 and the cylinder head cover 22. The valve operating device 73 is opened and closed (FIG. 4).

  In FIG. 4, one camshaft 75 is located in the V-shaped space sandwiched between the intake valve 63 and the exhaust valve 64 and is directed in the horizontal direction through a pair of left and right bearings 74 (FIG. 3). (FIGS. 3 and 4) are pivotally supported. An intake cam 76 and an exhaust cam 77 are integrally formed on the cam shaft 75 (FIG. 4). An intake rocker shaft 78 is mounted on the cylinder head 21 in front of and above the cam shaft 75, and an exhaust rocker shaft 79 is mounted on the cylinder head 21 below the intake rocker shaft 78. An intake rocker arm 80 and an exhaust rocker arm 81 are pivotally supported by a rocker shaft 78 and an exhaust rocker shaft 79, respectively. Sliding portions 80a and 81a are provided at one ends of the intake rocker arm 80 and the exhaust rocker arm 81, and the other ends of the intake rocker arm 80 and the exhaust rocker arm 81 are in contact with the top ends of the stems of the intake valve 63 and the exhaust valve 64. Portions 80b and 81b are provided.

  A driven sprocket 82 (FIG. 3) is integrally provided at the left end of the cam shaft 75. A drive sprocket 83 (FIG. 3) having half the number of teeth of the driven sprocket 82 is integrally fitted between the left crank web 28a of the crankshaft 28 and the drive pulley 43 described above. A transmission member storage space 84 for connecting the drive sprocket 83 and the driven sprocket 82 is provided on the left side of the cylinder block 20 and the cylinder head 21, and an endless chain 85 is provided in the drive sprocket 83 and the driven sprocket 82 in the space. Has been crossed. The above is the configuration of the valve gear 73. When the crankshaft 28 rotates, the camshaft 75 is driven to rotate at half the rotational speed, and the intake valve 63 and the exhaust valve 64 are opened and closed by the intake cam 76 and the exhaust cam 77 at a predetermined timing.

  As shown in FIGS. 3, 4, and 5, an oil pump 130 and a water pump 140 are provided at the lower right side of the internal combustion engine 7. In FIG. 3, the outer shells of the oil pump 130 and the water pump 140 are shown, but the inside is not shown. FIG. 4 shows an auxiliary machine base mounting surface 90 that is exposed on the right side of the right crankcase 23B after removing the auxiliary machine base 110 (described later) that forms the outer shell of the oil pump 130 and the water pump 140. The crankshaft 28, the oil pump shaft 131, the water pump shaft 141, and the drive mechanism related to these shafts are shown in a portion surrounded by the accessory base mounting surface 90.

  In FIG. 4, an oil pump drive gear 132 is fitted on the crankshaft 28, and an oil pump driven gear 133 that fits the oil pump drive gear 132 is fitted on the oil pump shaft 131. Further, a water pump drive sprocket 142 is fitted on the oil pump shaft 131, and a water pump driven sprocket 143 is fitted on the water pump shaft 141, and an endless chain 144 is wound around these sprockets. When the crankshaft 28 is rotated, the oil pump shaft 131 is rotationally driven by the gears 132 and 133, and the water pump shaft 141 is rotationally driven by the sprockets 142 and 143 and the endless chain 144. In the above configuration, the oil pump shaft 131 also has a function as a power transmission intermediate rotating shaft for transmitting power to the water pump shaft 141.

  FIG. 5 is a development view of a cross section passing through the crankshaft 28, the oil pump shaft 131, and the water pump shaft 141 of FIG. 4 (VV cross section development view of FIG. 4). In the figure, the arrow R points to the right. The left and right crankcases 23A and 23B are connected by bolts 91. The left and right crankcases 23A and 23B are joined by inserting a bolt 91 through the connection bolt insertion hole 92 of the right crankcase 23B and screwing it into the connection bolt screw hole 87 of the left crankcase 23A. The crankshaft 28 is rotatably supported by left and right crankcases 23A and 23B via bearings 26 and 27.

  The oil pump drive gear 132 is fitted to a portion of the crankshaft 28 adjacent to the right bearing 27. An auxiliary machine base 110 is attached to the right side of the right crankcase 23B. A stator 151 of an ACG (alternator) 150 is attached by a bolt 152 to an ACG stator mounting surface 113 (described later with reference to FIG. 8) of a cylindrical projection surrounding the crankshaft 28 of the auxiliary machine base 110. The figure shows one of the three bolts. The stator 151 is provided with a current extraction line 153. The rotor 154 of the AC generator 150 is attached to the end of the crankshaft 28 that passes through the through hole 112 of the auxiliary machine base 110, and the fan 155 is screwed to the end surface of the rotor 154. This fan 155 is for ventilating the radiator 156. A sealing material 88 is interposed between the through hole 112 of the auxiliary machine base 110 and the crankshaft 28.

  6 is a right side view of the right crankcase 23B, and FIG. 7 is a sectional view taken along line VII-VII in FIG. 6 and 7, the left and right crankcase connection bolts 91 are inserted through the insertion holes 92. An accessory base mounting surface 90 is formed on the right side surface of the right crankcase 23B. A crankshaft through hole 93 is provided at one end of a portion surrounded by the accessory base mounting surface 90. The crankshaft 28 protrudes rightward of the crankcase through the through hole 93. The through hole 93 is provided with a support portion 94 (FIG. 7) for the bearing 27.

  An oil pump shaft support recess 95 is formed at the center of the portion surrounded by the accessory base mounting surface 90, and an inflow portion oil groove 96 and an outflow portion oil groove 97 are formed surrounding the oil pump shaft support recess 95. An oil inflow passage 98 and an oil outflow passage 99 are formed from the periphery of the right crankcase 23B toward the oil grooves 96 and 97 (FIG. 6). A screw hole 100 for attaching an oil pump casing single is provided near the oil grooves 96 and 97.

  A water pump shaft support recess 101 is formed at the other end of the portion surrounded by the accessory base mounting surface 90. Auxiliary machine base mounting screw holes 102 for screwing auxiliary machine base 110 mounting bolts, which will be described later, are provided around the auxiliary machine base mounting surface 90.

  8 is a right side view of the auxiliary machine base 110, FIG. 9 is a left side view of the auxiliary machine base 110 (the back side of FIG. 8), and FIG. 10 is a sectional view taken along line XX of FIG. A contact surface 110a that contacts the accessory base mounting surface 90 of the right crankcase 23B is provided on the left surface (FIG. 9) of the accessory base 110, and a packing mounting groove 110b is formed on that surface. The auxiliary machine base 110 abuts the abutment surface 110a on the attachment surface 90 of the right crankcase 23B, and bolts inserted through the auxiliary machine base attachment bolt insertion holes 111 and 111A around the peripheral part of the right crankcase 23B. It is screwed into the auxiliary machine base mounting screw hole 102 and attached. The bolt insertion hole 111A is an insertion hole through which a water pump case mounting bolt described later is inserted.

  A crankshaft through hole 112 is provided at one end of the auxiliary machine base 110, and an ACG stator mounting surface 113 and three ACG stator mounting screw holes 114 are provided around the periphery thereof. The ACG stator mounting bolt 152 (FIG. 5) is screwed into the screw hole 114.

  A boss 115 is provided at the center of the auxiliary machine base 110. An oil pump shaft support recess 116 is formed in the left surface of the boss 115 (FIGS. 9 and 10). The oil pump shaft 131 is rotatably supported by an oil pump shaft support recess 95 (FIG. 7) of the right crankcase 23B and an oil pump shaft support recess 116 provided in the boss portion 115.

  A water pump shaft support through-hole 117 is provided at the other end of the auxiliary machine base 110. The water pump shaft 141 is rotatably supported via a bearing 145 (FIG. 5) fitted in the water pump shaft support recess 101 of the right crankcase 23B and the bearing support portion 118 (FIG. 10) of the through hole 117. The A water pump casing single mounting surface 119 is formed at the end of the auxiliary machine base 110. A discharge pipe 128 of a water pump is attached to an end portion of the portion surrounded by the attachment surface 119.

  11 is a right side view of the water pump casing ring 120, FIG. 12 is a left side view of the water pump casing ring 120 (the back side of FIG. 11), FIG. 13 is a sectional view taken along line XIII-XIII in FIG. It is -XIV sectional drawing. A contact surface 120a is provided on the left surface of the water pump casing single 120 (FIG. 12) to contact the water pump casing single mounting surface 119 of the accessory base 110, and a packing mounting groove 120b is formed on the surface. Three bolt insertion holes 121 and 121A are provided in the periphery of the water pump casing ring 120. When attaching the water pump casing ring 120, the abutment surface 120a is brought into contact with the mounting surface 119 of the auxiliary machine base 110, short bolts are inserted into the two bolt insertion holes 121, and the auxiliary machine base 110 is mounted. The water pump casing ring 120 is screwed into a screw hole 122 for attaching a water pump casing ring provided at a corresponding position, and the water pump casing ring 120 is fixed to the auxiliary machine base 110. A long bolt 123 (FIG. 5) is inserted through the bolt insertion hole 121A, and further through a bolt insertion hole 111A at a corresponding position of the accessory base 110, and then into a screw hole 102 at a corresponding position of the right crankcase 23B. The water pump casing ring 120, the auxiliary machine base 110, and the right crankcase 23B are integrally fixed by screwing.

  Two cooling water inlets 124 and 125 are provided at the top of the water pump casing ring 120. Further, a discharge water passage cover portion 127A connected to the spiral flow path cover portion 126A is provided at the lower portion. This forms a pair with the spiral flow passage base portion 126B and the discharge water passage base portion 127B (FIG. 8) of the auxiliary machine base 110 to become the spiral flow passage 126 and the discharge water passage 127, respectively. The discharged water is sent to the cylinder block 20 through a discharge pipe 128 (FIGS. 8, 9, and 10) attached to the auxiliary machine base 110.

  In FIG. 5, the oil pump shaft 131 is rotatably supported by the oil pump shaft support recess 95 of the right crankcase 23B and the oil pump shaft support recess 116 provided in the boss 115 of the auxiliary machine base 110. An oil pump driven gear 133 and a water pump drive sprocket 142 are fixed to the oil pump shaft 131. Adjacent to the right crankcase 23B, the oil pump shaft 131 is provided with an inner rotor 134 and an outer rotor 135 of the oil pump 130, and the outside thereof is covered with an oil pump casing ring 136 fixed to the right crankcase 23B. The oil pump casing single 136 is attached to the screw hole 100 provided in the right crankcase 23B with a screw.

  The water pump shaft 141 is rotatable through the water pump shaft support recess 101 at the end of the right crankcase 23B and the bearing 145 held inside the water pump shaft support through hole 117 at the end of the auxiliary machine base 110. It is supported by. A water pump driven sprocket 143 is fixed to the water pump shaft 141. An endless chain 144 is wound around the water pump driven sprocket 143 and the water pump drive sprocket 142 fixed to the oil pump shaft 131. A water pump impeller 146 is fixed to a shaft end portion of the water pump shaft 141 protruding rightward, and a water pump casing ring 120 covers the outside thereof. Between the impeller 146 and the bearing 145, a sealing material 147 is mounted between the inner surface of the water pump shaft support through-hole 117 of the auxiliary machine base 110 and the water pump shaft 141, and the sealing material 147 and the water pump casing single are attached. A water pump spiral passage 126 (not shown) is formed in a space surrounded by 120 and the inner surface of the water pump shaft support through-hole 117 of the auxiliary machine base 110.

  When the crankshaft 28 rotates, the oil pump shaft 131 rotates due to the engagement of the oil pump drive gear 132 and the driven gear 133, and the action of the inner rotor 134 and the outer rotor 135 in the oil pump casing ring 136 causes the crankcase to rotate. Lubricating oil accumulated in the inner bottom of 23 is sucked from an oil inflow passage 98 (FIG. 6) drilled in the right crankcase 23B, discharged from an oil outflow passage 99 (FIG. 6), and crankcase 23 and cylinder head 21 are supplied.

  When the oil pump shaft 131 rotates, the water pump driven sprocket 143 driven from the water pump drive sprocket 142 of the oil pump shaft 131 through the endless chain 144 rotates the water pump shaft 141, and the impeller 146 operates, The reflux cooling water cooled by the radiator 155 is sucked from the cooling water inlets 124 and 125 provided in the water pump casing ring 120, and is attached to the auxiliary machine base 110 through the spiral flow path 126 and the discharge water path 127. It is discharged from the discharge pipe 128 and supplied again to the cylinder block 20 and the like.

An ACG stator 151 is attached to the auxiliary machine base 110. An ACG rotor 154 is attached to the crankshaft 28 and rotates around the stator 151. When the crankshaft 28 rotates, power is generated by the interaction between the two, and current is extracted from the current extraction line 153 (FIG. 5).

  As described above in detail, in the above-described embodiment, the same member (auxiliary machine base 110) is used to drive the auxiliary machine (water pump 140) and the power transmission system (oil pump shaft 131 functioning as an intermediate rotating shaft), Since the number of parts is reduced and the assembly of the auxiliary machine and the power transmission system is easy, and these are supported by the same member, the inter-shaft distance is reduced. Thus, the driving noise can be reduced.

  Also, a power transmission member (oil pump shaft 131 functioning as an intermediate rotating shaft) is arranged on one side (crankcase side) of the auxiliary machine base 110, and the other side (opposite side of the crankcase) of the auxiliary machine base 110 Since the auxiliary machine (the main part of the water pump 140) is arranged in the machine, since the rigidity balance is good against the reaction force from the power transmission member, the auxiliary machine mounting structure can be reduced in weight.

  Further, since the oil pump shaft 131 is also used as an intermediate rotating shaft for power transmission, it is possible to arrange a plurality of auxiliary machines on the auxiliary machine base, and it is possible to reduce the size of the internal combustion engine by improving space efficiency. Yes.

1 is a side view of a scooter type motorcycle 1 equipped with an internal combustion engine having an auxiliary machine mounting structure of the present invention. It is the figure which looked at the longitudinal section of power unit 6 of the above-mentioned motorcycle from the left. FIG. 3 is a development view of a cross section of a plane including a cylinder axis, a crank shaft, a pulley shaft, and a gear shaft of the power unit 6. It is the figure which looked at the longitudinal cross-section of the internal combustion engine 7 from the right side. FIG. 5 is a development view of a cross section passing through the crankshaft 28, the oil pump shaft 131, and the water pump shaft 141 of FIG. 4 (VV cross section development view of FIG. 4). It is a right view of the right crankcase 23B. It is VII-VII sectional drawing of FIG. 2 is a right side view of an auxiliary machine base 110. FIG. It is a left view of the auxiliary machine base 110 (the back side of FIG. 8). It is XX sectional drawing of FIG. 4 is a right side view of a water pump casing single 120. FIG. FIG. 13 is a left side view of the water pump casing single 120 (the back side of FIG. 11). It is XIII-XIII sectional drawing of FIG. It is XIV-XIV sectional drawing of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Scooter type motorcycle, 2 ... Body frame, 3 ... Head pipe, 4 ... Front fork, 5 ... Front wheel, 6 ... Power unit, 7 ... Internal combustion engine, 8 ... Power transmission device, 9 ... Rear wheel support part , 10 ... rear wheels, 11 ... rear suspension, 12 ... article storage, 13 ... seat, 14 ... step floor, 15 ... fuel tank, 16 ... body cover, 20 ... cylinder block, 21 ... cylinder head, 21a ... contact surface , 22 ... Cylinder head cover, 23 ... Crankcase, 23A ... Left crankcase, 23B ... Right crankcase, 24 ... Cylinder hole, 25 ... Piston, 26 ... Bearing, 27 ... Bearing, 28 ... Crankshaft, 28a ... Left crank web , 29 ... piston pin, 30 ... crank pin, 31 ... connecting rod, 32 ... V-belt continuously variable transmission, 33 ... gear reducer, 40 ... right transmission case, 41 ... left transmission case, 42 Rear wheel support case, 43 ... Driving pulley, 44 ... Driven shaft, 45 ... Centrifugal clutch, 46 ... Driven pulley, 47 ... Endless V-belt, 48 ... Pinion gear, 49 ... Intermediate shaft, 50 ... Gear, 51 ... Pinion gear, 52 ... Axle, 53 ... gear, 60 ... combustion chamber, 61 ... intake port, 61a ... combustion chamber side opening, 61b ... outside opening, 62 ... exhaust port, 62a ... combustion chamber side opening, 62b ... outside opening, 63 ... intake valve, 64 ... Exhaust valve, 65 ... Intake pipe, 66 ... Air cleaner, 67 ... Throttle valve, 68 ... Fuel injection valve, 69 ... Exhaust pipe, 70 ... Muffler, 71 ... Valve spring, 72 ... Valve chamber, 73 ... Valve device 74 ... Bearing, 75 ... Cam shaft, 76 ... Intake cam, 77 ... Exhaust cam, 78 ... Intake rocker shaft, 79 ... Exhaust rocker shaft, 80 ... Intake rocker arm, 80a ... Sliding part, 80b ... Abutting part, 81 ... exhaust rocker arm, 81a ... sliding part, 81b ... contact part, 82 ... driven sprocket, 83 ... drive sprocket DOO, 84 ... transmission member housing space, 85 ... endless chain, 86 ... ignition plug, 87 ... right crankcase connecting screw hole (left crankcase), 88 ... sealing material (crankshaft periphery),
90 ... Auxiliary machine base mounting surface, 91 ... Left / right crankcase connection bolt, 92 ... Left / right crankcase connection bolt insertion hole, 93 ... Crankshaft through hole, 94 ... Bearing 27 support part, 95 ... Oil pump shaft support recess, 96 ... Inlet oil groove, 97 ... Outlet oil groove, 98 ... Oil inflow path, 99 ... Oil outflow path, 100 ... Oil pump casing single mounting screw hole, 101 ... Water pump shaft support recess, 102 ... Auxiliary machine base installation Screw holes,
110 ... Auxiliary machine base, 110a ... Abutting surface, 110b ... Packing mounting groove, 111, 111A ... Auxiliary machine base mounting bolt insertion hole, 112 ... Crank shaft through hole, 113 ... ACG stator mounting surface, 114 ... ACG stator mounting Screw hole, 115 ... boss portion, 116 ... oil pump shaft support recess, 117 ... water pump shaft support through hole, 118 ... bearing support portion, 119 ... water pump casing single mounting surface,
120 ... Water pump casing single, 120a ... Contact surface, 120b ... Pack mounting groove, 121, 121A ... Water pump casing single installation bolt insertion hole, 122 ... Water pump casing single installation screw hole, 123 ... Long bolt, 124 ... Cooling water inlet, 125 ... Cooling water inlet, 126 ... Swirl flow path, 126A ... Swirl flow path cover section, 126B ... Swirl flow path base section, 127 ... Discharge water path, 127A ... Discharge water path cover section, 127B ... Discharge Water passage base, 128 ... discharge pipe,
130 ... Oil pump, 131 ... Oil pump shaft, 132 ... Oil pump drive gear, 133 ... Oil pump driven gear, 134 ... Inner rotor, 135 ... Outer rotor, 136 ... Oil pump casing single,
140 ... Water pump, 141 ... Water pump shaft, 142 ... Water pump driven sprocket, 143 ... Water pump driven sprocket, 144 ... Endless chain, 145 ... Bearing, 146 ... Impeller, 147 ... Sealing material (outer circumference of water pump shaft),
150 ... AC generator, 151 ... stator, 152 ... bolt, 153 ... current extraction line, 154 ... rotor, 155 ... fan, 156 ... radiator

Claims (4)

A crankcase that supports and stores the crankshaft, and has a through-hole for penetrating the crankshaft and an accessory base mounting surface on one side;
A through hole for penetrating the crankshaft is provided, and a contact surface of the crankcase with the accessory base mounting surface is provided, and attached to the accessory base mounting surface of the crankcase along the crankcase by the corresponding contact surface. Auxiliary machine base,
Consists of
The auxiliary machine base includes a mounting surface of a stator of an alternator and a mounting part of an auxiliary machine driven by a crankshaft,
An intermediate rotating shaft for power transmission of the auxiliary device is supported between a shaft support portion provided on the one side of the crankcase and a boss portion provided on a wall portion facing the crankcase of the auxiliary device base. An auxiliary machine mounting structure for an internal combustion engine characterized by the above. 2. The auxiliary machine attachment of the internal combustion engine according to claim 1, wherein the power transmission intermediate shaft is disposed between a crank web of the crankshaft and the AC generator in a direction along the crankshaft. Construction. Wherein the auxiliary base, on the side opposite to the moving force transmitting side intermediate rotary shaft Ru are arranged, wherein the accessory rotating at power transmitted by the pre-Symbol intermediate rotary shaft are arranged An auxiliary machine mounting structure for an internal combustion engine according to claim 1 or 2. Prior Symbol power transmission intermediate rotary shaft, an oil pump shaft, and one of the claims 1 to 3, characterized in that for supporting the output member of the power between the input member of the power from the crankshaft to accessory auxiliary machine mounting structure for an internal combustion engine according to either.

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