JP2011201398A - Motorcycle wheel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motorcycle wheel, which can reduce a width of the wheel.SOLUTION: A motorcycle wheel 40 couples a rim 41 to a hub 42 with spokes 43. Recesses 42A into which heads 43B of the spokes 43 are inserted are opened in outer edges of side faces of the hub 42. The heads 43B engages with the recesses 42A. Open ends of the recesses 42A are blocked with brake disks 60 which are fastened to the side faces 45 of the hub 42 so that the brake disks serves as retainers of the spokes 43.

Description

  The present invention relates to a motorcycle wheel that connects a rim and a hub with spokes.

  2. Description of the Related Art Conventionally, there is known a motorcycle wheel in which a rim and a hub are connected with spokes and a brake disc is fastened to the hub (see, for example, Patent Document 1). In this wheel, a flange portion is provided on the outer peripheral surface of the hub, a through hole is formed in the flange portion, spokes are attached, and brake discs are attached to both ends of the flange portion.

JP 11-348501 A

However, in the above-described conventional configuration, since the spoke and the brake disc are attached to the flange portions at different positions, it is necessary to ensure the rigidity of the flange portion at each of the attachment positions of the spoke and the brake disc. The size increases in the direction, and the width of the vehicle increases.
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a wheel of a motorcycle that can be reduced in the vehicle width direction.

In order to achieve the above object, the present invention provides a wheel of a motorcycle in which a rim (41) and a hub (42) are connected by a spoke (43), and the spoke ( 43), the concave portion (42A) into which the head portion (43B) is inserted is opened, the head portion (43B) is locked in the concave portion (42A), and fastened to the side surface (45) of the hub portion (42). The brake disk (60) is used to block the open end of the recess (42A) to prevent the spoke (43) from coming off.
According to the above configuration, the recess in which the head portion of the spoke is inserted is opened at the outer peripheral side end of the hub, the head is locked in the recess, and the open end of the recess is fastened to the side surface of the hub portion. Since the spokes and the brake discs are prevented from coming off, it is only necessary to secure rigidity on the side surface of the hub to which the spokes and brake discs are attached, so that the vehicle width direction of the hub can be reduced. In addition, since the spoke is locked in the recess formed on the side edge of the outer periphery of the hub, the spoke can be locked to the hub with a simple configuration without forming a flange portion on the outer peripheral surface of the hub. The layout flexibility is also improved. Furthermore, since the head of the spoke is locked to the side surface located at the end in the width direction of the hub, the angle (elevation angle) formed by the spokes facing in the vehicle width direction can be increased. Directional rigidity can be secured.

In the above configuration, the brake disc (60) may be attached to both side surfaces (44, 45) of the hub (42).
According to the above configuration, since the brake discs are attached to both side surfaces of the hub, the brake of the motorcycle can be easily a double disc brake.

In the above configuration, a disc plate (47) is attached to one side surface (44) of the hub (42), and the disc plate (47) closes the open end of the recess (42A) to prevent the spoke (43) from coming off. Also good.
According to the above configuration, the disc plate is attached to one side surface of the hub, and the open end of the concave portion is closed by this disc plate to prevent the spoke from coming off. Therefore, the brake of the motorcycle can be easily a single disc brake.

The said structure WHEREIN: The said hub (42) is made into the hollow cylinder shape which consists of both sides | surfaces (44,45) and an outer peripheral surface (46), and the drive motor (15 provided with a rotor (15B) and a stator (15C) in it. ) May be stored.
According to the above configuration, even if the hub is formed in a hollow cylindrical shape having both side surfaces and an outer peripheral surface, and the drive motor including the rotor and the stator is housed therein, the head portion of the spoke is at the outer end of the hub. Rigidity is secured with a simple structure by opening the recessed part to be inserted, locking the head to this recessed part, and closing the open end of the recessed part with a brake disk that is fastened to the side surface of the hub part to prevent the spoke from coming off. can do.

In the above configuration, the rotational axis (C1) of the rotor (15B) and the rotational axis (C2) of the rim (41) are arranged in parallel, and the rotor (15B) is placed at the center in the width direction of the hub (42). You may arrange.
According to the above configuration, the rotation axis of the rotor and the rotation axis of the rim are arranged in parallel, and the rotor is arranged at the center in the width direction of the hub, so that the balance of the wheels in the vehicle width direction can be equalized.

The said structure WHEREIN: The said recessed part (42A) is provided in the outer peripheral end part of the said hub (42), and while the said brake disc (60) is provided so that the said recessed part (42A) may be covered, the said brake disc (60) The fastening portion (49) between the hub (42) and the side surface (45) of the hub (42) may be provided on a circumference connecting the plurality of concave portions (42A).
According to the above configuration, the recess is provided at the outer peripheral end of the hub, the brake disc is provided so as to cover the recess, and the fastening portion between the brake disc and the side surface of the hub is on the circumference connecting the plurality of recesses. Therefore, the fastening portion of the brake disc is provided on the outer peripheral end side of the hub, and the distance from the fastening portion of the brake disc to the sliding portion is shortened, so the shearing force applied to the fastening portion during braking can be reduced. . Further, since the outer diameter of the brake disk is increased and the pressure receiving area from the brake caliper is increased, the frictional heat can be reduced. Further, since the sliding part of the brake disk is located on the outer peripheral side of the hub, the brake caliper can be disposed above the spokes inclined toward the inner side of the vehicle body in order to ensure the elevation angle. In addition, since the fastening portion is located in the vicinity of the concave portion, the spoke can be firmly held. Furthermore, since the recess is covered with the brake disc, the aesthetics of the hub can be improved.

In the above configuration, the brake disc (60) includes a disc rotor (60A) and a fastening surface (60C) fastened to the hub (42), and the disc rotor (60A) includes the fastening surface (60C). ) May be offset more outward in the vehicle width direction.
According to the above configuration, the brake disc includes the disc rotor and the fastening surface fastened to the hub, and the disc rotor is offset outward in the vehicle width direction from the fastening surface. Can be widened by an offset amount, so that a mounting space for a brake caliper for braking the disc rotor can be secured.

The said structure WHEREIN: You may provide a cooling fin in the circumferential direction between the both ends of the said hub (42) on the outer periphery of the said hub (42).
According to the above configuration, by providing the recess that locks the head portion of the spoke at the side end of the outer periphery of the hub, cooling fins can be provided in the circumferential direction between both ends of the hub on the outer periphery of the hub. The drive motor in the hub can be effectively cooled.

The said structure WHEREIN: The said recessed part (42A) may be formed in a triangle shape, and the head (43B) of the said spoke (43) may be formed according to the said triangle shape.
According to the above configuration, the concave portion is formed in a triangular shape, and the spoke heads are also formed in accordance with the triangular shape. Therefore, the cross-sectional shape of the concave portion and the spoke head changes smoothly and becomes a flat shape. Therefore, stress concentration can be avoided and the hub and spoke can be easily manufactured.

  According to the present invention, the recessed portion into which the head portion of the spoke is inserted is opened at the outer peripheral side end of the hub, and the opened end of the recessed portion is locked with the brake disk that is locked to the side surface of the hub portion. Since the spokes and brake discs are prevented from slipping out, it is only necessary to secure rigidity on the side of the hub to which the spokes and brake discs are attached, so that the hub width direction can be reduced, and as a result, the wheel width direction can be reduced. . In addition, since the spoke is locked in the recess formed on the side edge of the outer periphery of the hub, the spoke can be locked to the hub with a simple configuration without forming a flange portion on the outer peripheral surface of the hub. The layout flexibility is also improved. Furthermore, since the head of the spoke is locked to the side surface located at the end in the width direction of the hub, the angle (elevation angle) formed by the spokes facing in the vehicle width direction can be increased. Directional rigidity can be secured.

  Further, if brake discs are attached to both side surfaces of the hub, the motorcycle brake can easily be a double disc brake.

  Further, if a disc plate is attached to one side of the hub, and the open end of the recess is closed with this disc plate to prevent the spoke from coming off, the brake of the motorcycle can be easily made a single disc brake.

  In addition, even if the hub has a hollow cylindrical shape composed of both side surfaces and an outer peripheral surface, and a drive motor including a rotor and a stator is housed therein, a recess in which the head of the spoke is inserted at the outer peripheral side end of the hub Can be secured with a simple structure by locking the head to this recess and closing the open end of the recess with a brake disc that is fastened to the side surface of the hub to prevent the spoke from coming off. .

  Further, if the rotation axis of the rotor and the rotation axis of the rim are arranged in parallel and the rotor is arranged at the center in the width direction of the hub, the balance of the wheels in the vehicle width direction can be equalized.

  Further, the recess is provided at the outer peripheral end of the hub, the brake disc is provided so as to cover the recess, and the fastening portion between the brake disc and the side surface of the hub is provided on the circumference connecting the plurality of recesses, Since the fastening portion of the brake disk is provided on the outer peripheral end side of the hub, and the distance from the fastening portion of the brake disc to the sliding portion is shortened, the shearing force applied to the fastening portion during braking can be reduced. Further, since the outer diameter of the brake disk is increased and the pressure receiving area from the brake caliper is increased, the frictional heat can be reduced. In addition, since the sliding part of the brake disc is located on the outer peripheral side of the hub, the brake caliper can be arranged above the spoke tilted inward of the vehicle body in order to secure an elevation angle, and as a result, the wheel is mounted on the vehicle. The size can be reduced in the width direction. In addition, since the fastening portion is located in the vicinity of the recess, the spoke can be firmly held. Further, since the recess is covered with the brake disc, the aesthetic appearance of the hub can be improved.

  The brake disc includes a disc rotor and a fastening surface fastened to the hub. If the disc rotor is offset from the fastening surface to the outside in the vehicle width direction, the offset between the spoke and the disc rotor is equivalent to the offset amount. Since it can be widened, a mounting space for a brake caliper for braking the disc rotor can be secured.

  In addition, by providing a recess that locks the head of the spoke on the side edge of the outer periphery of the hub, cooling fins can be provided in the circumferential direction between both ends of the hub on the outer periphery of the hub. The drive motor can be effectively cooled.

  In addition, if the recess is formed in a triangular shape, and the spoke head is also formed in a triangular shape, the cross-sectional shape of the recess and the spoke head changes smoothly and becomes a flat shape. The stress concentration of the spoke can be avoided and the hub and the spoke can be easily manufactured.

1 is a right side view of a motorcycle to which a wheel according to an embodiment of the present invention is applied. It is a figure which shows the internal structure of a motorcycle. It is a longitudinal cross-sectional view which shows a front wheel from the front. It is sectional drawing which expands and shows the wheel of a front wheel. It is a cross-sectional view showing a rear wheel from above. It is sectional drawing which shows the wheel which concerns on the modification of this invention. It is sectional drawing which shows the wheel which concerns on the other modification of this invention. It is sectional drawing which shows the wheel which concerns on another modification of this invention. It is a right view which shows the wheel of FIG. It is a right view which shows the wheel which concerns on the modification of FIG.8 and FIG.9.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a right side view of a motorcycle to which a wheel according to an embodiment of the present invention is applied, and FIG. 2 is a diagram showing an internal structure of the motorcycle. In the following description, the directions such as front and rear, right and left, and up and down follow the directions viewed from the vehicle occupant.
The motorcycle 10 is a saddle-ride type vehicle in which a fuel tank 12 is disposed under a seat 11 on which an occupant (driver) sits, and a U-shaped leg straddle portion in front of the seat 11 and the fuel tank 12 in a side view. M, and an engine (also referred to as a power unit) 20 that is an internal combustion engine is provided below the leg straddle M and the fuel tank 12.
The motorcycle 10 includes a vehicle body frame 2, a steering stem 4 that is rotatably supported by a head pipe 3 of the vehicle body frame 2 and forms a part of a steering system, and a left and right coupled to a lower portion of the steering stem 4. A pair of front forks 5, a steering handle 6 connected to the upper end of the steering stem 4, a front wheel 7 rotatably supported on the front fork 5, and a rear part of the body frame 2 are supported so as to swing up and down. The swing arm 8, the rear wheel 9 rotatably supported at the rear end of the swing arm 8, and the engine 20 supported at the lower part of the front and rear intermediate position of the body frame 2 (between the front wheel 7 and the rear wheel 9). It has.

The vehicle body frame 2 includes a single main frame 22 extending rearward and downward from the head pipe 3 provided at the front end, a pair of left and right rear frames 23 extending rearward and upward from the rear portion of the main frame 22, and downward from the rear portion of the main frame 22. The main frame 22 and the rear frame 23 are formed of metal pipes.
The rear frame 23 includes a pair of left and right first rear frames 25 and a second rear frame 26 that extend rearward and upward from the rear portion of the main frame 22. The first rear frame 25 is integrally provided with an inclined portion 25A extending rearward and upward from the rear end of the main frame 22 and a horizontal portion 25B extending horizontally rearward from the rear end of the inclined portion 25A. 31 and the tail lamp 32 (see FIG. 2) are supported.
The second rear frame 26 extends rearward and upward from the main frame 22 on the front side and above the first rear frame 25, and the rear end thereof is connected to the inclined portion 25 </ b> A of the first rear frame 25.

  Thus, since the rear frame 23 is composed of the first rear frame 25 and the second rear frame 26, the rigidity of the rear frame 23 itself can be sufficiently secured. In addition, since the second rear frame 26 bridges the main frame 22 and the first rear frame 25, it functions as a reinforcing frame that reinforces the connection rigidity between the main frame 22 and the first rear frame 25. The rigidity can be increased efficiently.

The swing arm 8 is pivotally supported on the left and right pivot plates 24 via a pivot shaft 33, and a pair of left and right swings is provided between the rear portion of the swing arm 8 and the horizontal portion 25 B of the first rear frame 25. A rear cushion 34 is inserted.
The pivot plate 24 is attached with a main stand 35 (see FIG. 1) for parking the vehicle body in a vertical posture with respect to the ground. FIG. 1 shows the state where the main stand 35 is lowered to the parking position. In the position, it is formed in a stand shape that stands up so as to incline forward and downward. As shown in this figure, the rear wheel 9 is lifted by hanging the main stand 35.

As shown in FIG. 2, the upper part of the engine 20 is suspended by a support bracket 36 suspended from the central part of the main frame 22, and the rear part thereof is fixed to the upper part and the lower part of the pivot plate 24. It is supported below the main frame 22 and in front of the pivot plate 24.
The engine 20 is a single-cylinder four-cycle air-cooled engine, and is a horizontal engine in which a cylinder portion 61 projects substantially horizontally from the front portion of the crankcase 62 toward the front. By adopting this horizontal engine, it is possible to lower the center of gravity of the vehicle body, to lower the main frame 22 and to lower the leg straddle M, and to improve boarding / exiting performance.
The cylinder part 61 includes a cylinder block 61A connected to the front part of the crankcase 62, a cylinder head 61B connected to the front part of the cylinder block 61A, and a head cover 61C connected to the front part of the cylinder head 61B. Is done.

An intake pipe 70, a throttle body (fuel supply device) 71, and an air cleaner unit 72 are connected in order to the upper surface of the cylinder head 61B, which is the front upper portion of the engine 20, and an engine intake system is configured by these. This engine intake system is disposed between the engine 20 and the main frame 22 and inside the main frame cover 52, that is, laid out in a space above the engine 20. An injector 65 that supplies fuel to the engine intake system is attached to the intake pipe 70.
A single exhaust pipe 75 is connected to the lower surface of the cylinder head 61B. The exhaust pipe 75 extends downward and then bends and extends rearward, and is connected to a muffler 76 disposed on the right side of the rear wheel 9. Is done. That is, the exhaust pipe 75 and the muffler 76 constitute an engine exhaust system, and the engine exhaust system is laid out in a space below the engine 20 and in the side of the rear wheel 9.

  An output shaft (not shown) of the engine 20 is pivotally supported at the rear side of the left side surface of the crankcase 62 of the engine 20 with its tip exposed, and a drive sprocket 27 is attached to the tip of the output shaft. A chain 29 is wound between the drive sprocket 27 and a driven sprocket 28 provided integrally with the rear wheel 9, thereby constituting a chain transmission mechanism for transmitting the power of the output shaft to the rear wheel 9. Is done. Thereby, the power of the engine 20 is transmitted to the rear wheel 9 through this chain transmission mechanism. A chain case 30 that covers the chain 29 is attached to the swing arm 8 so as to swing integrally.

  A brake lever 37 for braking the front wheel 7 is attached to the right end side of the handle 6. A brake pedal 38 for braking the rear wheel 9 is rotatably supported at the lower rear end of the engine 20. A master cylinder (not shown) located in the vicinity of each of the brake lever 37 and the brake pedal 38 is connected to the brake lever 37 and the brake pedal 38, and a hydraulic hose (not shown) extending from each master cylinder is connected to the front wheel 7. And the brake device 80 which brakes each of the rear wheels 9 is connected. When the brake fluid is sealed in the master cylinder and the hydraulic hose and the brake lever 37 and the brake pedal 38 are operated, each master cylinder increases the pressure of the brake fluid in the hydraulic hose, and the increase of the brake fluid pressure causes the master cylinder and the hydraulic hose to operate. Each brake device 80 operates.

As shown in FIGS. 1 and 2, the motorcycle 10 includes a synthetic resin vehicle body cover 50 that covers substantially the entire vehicle body. The vehicle body cover 50 includes a front cover 51 that covers a front portion of the vehicle body (the head pipe 3 and the like), and a main frame cover that is connected from the rear of the head pipe 3 so as to sandwich the head pipe 3 between the front cover 51 and covers the main frame 22 halfway. 52, a rear side cover 53 connected to the rear edge of the main frame cover 52 and covering the periphery of the fuel tank 12, and a handle cover 54 covering the left and right central portions of the handle 6.
The main frame cover 52 covers the main frame 22 from above to the left and right, and covers both sides of the cylinder portion 61 of the engine 20 and the upper edge of the crankcase 62 of the engine 20. The main frame cover 52 is integrally formed with a pair of left and right leg shields 55 covering the front of the passenger's feet.

The rear side cover 53 is provided with a detachable lid 53A. By removing the lid 53A, components inside the rear side cover 53 can be accessed.
Reference numeral 56 denotes a front fender attached to the front fork 5 and covering the front wheel 7 from above. Reference numeral 57 denotes a rear fender attached to the rear frame 23 and covering the rear wheel 9 from above.

Next, the front wheel 7 will be described in detail.
FIG. 3 is a longitudinal sectional view showing the front wheel 7 from the front, and FIG. 4 is an enlarged sectional view showing the wheel 40 of the front wheel 7.
The front wheel 7 is pivotally supported by an axle 13 that is inserted between the lower ends of the pair of left and right front forks 5. The front wheel 7 includes a tire 14 and a wheel 40 to which the tire 14 is attached. An annular brake disc 60 is attached to the wheel 40, and a brake device 80 that brakes the brake disc 60 that rotates together with the wheel 40 is attached to the front fork 5. Therefore, in this embodiment, a disc brake is employed.

The brake device 80 includes a brake disc 60, a pad 81 that sandwiches the brake disc 60 from both sides, a brake caliper 82 that accommodates the pad 81 and presses the pad 81 to brake the brake disc 60, and the brake caliper 82 is mounted on the front fork. 5 and a caliper bracket 83 connected to 5.
The caliper bracket 83 is formed in a plate shape and is fixed to the front fork 5 by a bolt (not shown). On the caliper bracket 83, a pin bolt 84 that slidably supports the brake caliper 82 is erected substantially parallel to the axle 13 in the outward direction.

  The brake caliper 82 is fixed to the vehicle rear side of the front fork 5 via a caliper bracket 83. The brake caliper 82 is disposed so as to fit into the disc rotor (sliding portion) 60A of the brake disc 60 from the outer peripheral side of the brake disc 60, and a pad 81 is mounted in the brake caliper 82 along the disc rotor 60A. Has been. The pad 81 is pivotally supported by a hanger pin (not shown) provided substantially parallel to the axle 13 on the brake caliper 82 and is slidable in the axial direction of the hanger pin. The pad 81 includes a fixed side pad 81A located on the inner side in the vehicle width direction with the disc rotor 60A of the brake disc 60 interposed therebetween, and a movable side pad 81B located on the outer side in the vehicle width direction.

The brake caliper 82 includes a piston 85 that presses the pad 81 against the disk rotor 60A, and the piston 85 is provided in contact with the back surface side of the movable pad 81B. The piston 85 is driven by the hydraulic pressure from the master cylinder.
The brake caliper 82 is a so-called pin slide caliper that is slidably supported by a pin bolt 84. That is, when the piston 85 presses the movable pad 81B toward the disk rotor 60A due to the hydraulic pressure, the brake caliper 82 presses the disk rotor 60A outwardly in the vehicle width direction on the pin bolt 84 together with the fixed pad 81A by the reaction force. To move. As a result, the brake caliper 82 can sandwich the disc rotor 60A from both sides by driving the piston 85 provided on one side, and can brake the front wheel 7 by friction between the disc rotor 60A and the pad 81.

The wheel 40 is configured by connecting an annular rim 41 to which the tire 14 is attached and a hub 42 supported on the axle 13 and rotating on the axle 13 by a plurality of spokes 43.
The plurality of spokes 43 are provided on the left and right sides, and the pair of left and right spokes 43 are arranged so as to be substantially Y-shaped in a side view. Each spoke 43 includes a wire-shaped spoke body 43A, and a substantially hemispherical head 43B formed at the end of the spoke body 43A on the hub 42 side is locked to the hub 42, and the spoke body positioned on the rim 41 side. The tip of 43A is fixed to the wheel 40 by being screwed onto the nipple 41A engaged with the rim 41.

The hub 42 is a spoke that is cast into a hollow, substantially cylindrical shape including a left side surface (side surface, one side surface) 44, a right side surface (side surface, other side surface) 45, and an outer peripheral surface 46, and absorbs impacts and the like during traveling. 43 and a sufficient thickness are secured so that the brake disc 60 to which a large force is applied during braking can be reliably supported. The hub 42 extends in the vehicle width direction, and the drive motor 15 driven by power supplied from a battery (not shown) is liquid-tightly accommodated in the hub 42. Therefore, the motorcycle 10 (FIG. 1) of the present embodiment is configured as a hybrid motorcycle using the engine 20 (FIG. 1) and the drive motor 15 as drive sources.
The drive motor 15 includes an output shaft 15A externally fitted to the axle 13, a rotor 15B connected to the output shaft 15A, and a stator 15C disposed on the outer peripheral side of the rotor 15B and fixed to the hub 42. Yes. The rotor 15B is arranged such that the rotation surface P1 and the rotation surface P2 of the rim 41 are located on substantially the same plane, and the rotation axis C1 and the rotation axis C2 of the rim 41 are arranged substantially in parallel. The hub 42 is disposed at the center in the width direction. 3 and 4, the inside of the hub 42 and the drive motor 15 are schematically shown.

  The left side surface 44 and the right side surface 45 of the hub 42 are positioned on the flat surfaces 44A and 45A located at the center of the hub 42 and the side edges of the outer periphery of the hub 42 so as to narrow the width of the outer periphery of the hub 42. Inclined portions 44B and 45B are provided. In the inclined portions 44B and 45B, a concave portion 42A for locking the head portion 43B of the spoke 43 is formed so as to open to both sides. The recess 42A includes a head recess 42A1 into which the head 43B of the spoke 43 is inserted and a spoke body recess 42A2 into which the spoke body 43A of the spoke 43 is inserted, and is formed by casting when the hub 42 is cast. By forming this recess 42A in the recess 42A, a boss 42C is integrally provided at the outer peripheral end of the hub 42, and this boss 42C is formed so as to be substantially orthogonal to the extending direction of the spoke body 43A. ing. The spoke 43 is locked to the hub 42 by the seat portion of the head portion 43B coming into contact with the end surface of the boss 42C on the side of the head recess portion 42A1.

The inclined portions 44B and 45B are fixed surfaces for fixing the disc plate 47 and the brake disc 60, and screw holes 42B for screwing the fastening bolts 48 for fastening the disc plate 47 and the brake disc 60 are formed.
A disc plate 47 formed in an annular shape concentric with the wheel 40 is fastened to the left side surface 44 of the hub 42 by fastening bolts 48. The disc plate 47 covers a part of the flat surface 44A and extends from the outer peripheral end of the flat surface 44A to the outer peripheral end of the inclined portion 44B so as to close the open end of the concave portion 42A. The disk plate 47 is formed with a through hole 47A through which the fastening bolt 48 passes at a position corresponding to the screw hole 42B.

  A brake disc 60 formed in an annular shape concentric with the wheel 40 is fastened to the right side surface 45 of the hub 42 by fastening bolts 48. The brake disc 60 has a disc rotor 60A that is pressed by the pad 81, an extending portion 60B that extends inward in the vehicle width direction from the disc rotor 60A, and a fastening surface 60C that extends along the right side surface 45 of the hub 42. It is integrally formed from the outside in the direction to the inside. The fastening surface 60C covers a part of the flat surface 45A and extends from the outer peripheral end of the flat surface 45A to the outer peripheral end of the inclined portion 45B so as to close the open end of the recess 42A. The disc rotor 60A is slightly offset from the fastening surface 60C by the amount δ outward in the vehicle width direction. A through hole 60D through which the fastening bolt 48 passes is formed in the fastening surface 60C at a position corresponding to the screw hole 42B. The screw hole 42B, the through hole 47A, and the fastening bolt 48, or the screw hole 42B, the through hole 60D, and the fastening bolt 48 form a fastening portion 49 of the disk plate 47 and the brake disc 60, respectively. As shown in FIG. 2, the fastening portion 49 is provided so as to substantially ride on the circumferential shape drawn by the plurality of concave portions 42 </ b> A.

Next, the rear wheel 9 will be described in detail.
FIG. 5 is a cross-sectional view showing the rear wheel 9 from above.
The rear wheel 9 is pivotally supported by an axle 16 that is inserted between the rear ends of the pair of left and right swing arms 8. The rear wheel 9 includes a tire 14 and a wheel 40 to which the tire 14 is attached. An annular brake disc 60 is attached to the wheel 40, and a brake device 80 that brakes the brake disc 60 that rotates together with the wheel 40 is attached to the swing arm 8.
Here, since the brake device 80 of the rear wheel 9 has substantially the same configuration as the brake device 80 of the front wheel 7, the same reference numerals are given to the same parts in FIG. Further, since the wheel 40 of the rear wheel 9 has substantially the same configuration as the wheel 40 of the front wheel 7 except that the drive motor 15 is not housed in the hub 42, the same reference numerals are given to the same portions in FIG. The description is omitted. The hub 42 of the rear wheel 9 may be formed with a diameter smaller than the diameter of the hub 42 of the front wheel 7 because the drive motor 15 is not disposed therein.

Next, the operation of the wheel 40 will be described with reference to FIGS.
As shown in FIGS. 3 to 5, the spoke 43 is attached to the side surfaces 44 and 45 of the hub 42 and the brake disk 60 is attached to the right side surface 45 of the hub 42, so that only the side surfaces 44 and 45 need to have rigidity. . Since the side surfaces 44 and 45 of the hub 42 have a relatively simple configuration as compared with the conventional flange portion, the rigidity can be easily increased by increasing the thickness toward the inside, for example. As a result, an increase in the size of the hub 42 can be suppressed, and consequently an increase in the size of the wheel 40 in the vehicle width direction can be suppressed.

  Since the spoke 43 is locked to the recess 42A formed on the side surfaces 44 and 45 of the hub 42, the spoke 43 is locked to the hub 42 with a simple configuration without forming a flange portion or the like on the outer peripheral surface of the hub 42. In addition, the layout of the spokes 43 can be freely changed by changing the position of the recess 42A. Moreover, since the head 43B is latched by the side surfaces 44 and 45 located in the width direction edge part of the hub 42, since the spoke 43 can increase the angle (elevation angle (theta)) formed by the left and right spokes 43. The rigidity of the wheel 40 in the vehicle width direction can be ensured. Since the recess 42A for fixing the spoke 43 to the hub 42 is formed by casting when the hub 42 is cast, the spoke 43 can be fixed to the hub 42 without processing the hub 42.

Since the disc plate 47 is attached to the left side surface 44 of the hub 42, the brake of the motorcycle 10 can be easily a single disc brake.
Since the disc plate 47 and the brake disc 60 are provided so as to cover the recess 42A, the spoke 43 is sandwiched by the disc plate 47, the brake disc 60 and the hub 42, so that the spoke 43 in the vehicle width direction is arranged. Sufficient holding force can be secured. Further, since the recess 42A is covered with the disk plate 47 and the brake disc 60, the aesthetic appearance of the hub 42 is improved.

The fastening portion 49 that fastens the disk plate 47 and the brake disc 60 to the hub 42 is provided on the outer peripheral end side of the hub 42, and thus the accessibility to the fastening portion 49 is good. For example, the fastening bolt 48 can be easily fastened even when a cover (not shown) covering the entire hub 42 is fastened to the hub 42 with the fastening bolt 48.
Further, by providing the fastening portion 49 on the outer peripheral end side of the hub 42, the distance from the fastening portion 49 to the disk rotor 60A is shortened, so that the shearing force applied to the fastening portion 49 during braking can be reduced, and the brake disc 60 can be reduced. Can be reduced in weight. Further, since the outer diameter of the brake disc 60 is increased, the pressure receiving area from the brake caliper 82 can be increased and the frictional heat can be reduced. In addition, since the disc rotor 60A of the brake disc 60 is located on the outer peripheral side of the hub 42, the brake caliper 82 can be disposed above the spoke 43 inclined to the inside of the vehicle body in order to secure the elevation angle θ. The wheel 40 can be downsized in the vehicle width direction.

Since the fastening portion 49 is provided on the inclined portions 44B and 45B, the fastening bolt 48 can be prevented from protruding from the hub 42, and the hub 42 can be prevented from being enlarged in the width direction. Further, as shown in FIG. 2, the fastening portion 49 is provided on the circumference connecting the plurality of concave portions 42A, so the fastening portion 49 is positioned in the vicinity of the concave portion 42A, and the spoke 43 is made stronger. Can hold.
As shown in FIG. 4, the disc rotor 60A is slightly offset by δ from the fastening surface 60C to the outside in the vehicle width direction. Therefore, the gap between the spoke 43 and the disc rotor 60A is widened by an offset amount (some δ). Therefore, it is possible to secure a mounting space for the brake caliper 82 that brakes the disc rotor 60A.

  In the present embodiment, the drive motor 15 is liquid-tightly stored in the hub 42 of the front wheel 7. In this configuration, a structure in which a through hole is formed in the wall surface of the hub and the spoke is attached cannot be adopted because water or the like enters the hub. Further, in the above configuration, since the diameter of the hub 42 is increased by incorporating the drive motor 15 in the hub 42, the structure in which the ribs are formed on the outer peripheral surface of the hub to lock the spokes has low rib rigidity. So it can not be adopted. In the present embodiment, since the structure in which the spokes 43 are locked to the recesses 42A formed on the side surfaces 44 and 45 is adopted, even when the drive motor 15 is built in the hub 42 in a liquid-tight manner, the structure is simple. Rigidity can be ensured.

  Further, in the above configuration in which the drive motor 15 is built in the hub 42, for example, when a drum brake is employed, the drum brake cannot be disposed inside the hub 42. And the wheel 40 is enlarged in the vehicle width direction, and the weight of the wheel 40 is biased. In the present embodiment, a disc brake is employed, and the rotor 15B is disposed so that the rotation surface P1 of the rotor 15B and the rotation surface P2 of the rim 41 are substantially on the same plane, and the rotor 15B is disposed in the width direction of the hub 42. Since it arrange | positions in the center, the balance of the vehicle width direction of the wheel 40 can be equalized, suppressing the enlargement of the vehicle width direction of the wheel 40. FIG.

  As described above, according to the present embodiment, the recessed portion 42A into which the head portion 43B of the spoke 43 is inserted is opened to the inclined portions 44B and 45B located on the outer peripheral side end of the hub 42, and the recessed portion 42A is opened. The head 43B is locked, and the brake disc 60 fastened to the right side surface 45 of the hub 42 is used to block the open end of the recess 42A to prevent the spoke 43 from coming off. With this configuration, it is sufficient to ensure rigidity only on the side surfaces 44 and 45 of the hub 42 to which the spokes 43 and the brake disc 60 are attached. Therefore, the hub 42 can be downsized, and as a result, the vehicle width direction of the wheel 40 can be reduced. Further, since the spoke 43 is locked to the concave portion 42A formed in the inclined portions 44B and 45B located on the outer peripheral side end of the hub 42, a simple configuration is achieved without forming a flange portion on the outer peripheral surface of the hub. Thus, the spoke 43 can be locked to the hub 42, and the layout freedom of the spoke 43 is improved. Further, since the head portion 43B of the spoke 43 is locked to the side surfaces 44 and 45 positioned at the end portion in the width direction of the hub 42, the angle (elevation angle) formed by the spoke 43 facing in the vehicle width direction is increased. Therefore, the rigidity of the wheel 40 in the vehicle width direction can be ensured.

  Further, according to the present embodiment, the disk plate 47 is attached to the left side surface 44 of the hub 42, and the open end of the recess 42A is closed by the disk plate 47 to prevent the spoke 43 from being removed. The brake can easily be a single disc brake.

  Further, according to the present embodiment, even when the hub 42 is formed into a hollow columnar shape including both side surfaces 44, 45 and the outer peripheral surface 46, and the drive motor 15 including the rotor 15B and the stator 15C is housed therein, A concave portion 42A into which the head portion 43B of the spoke 43 is inserted is opened in the inclined portions 44B and 45B located on the outer peripheral side end of the hub 42, and the head portion 43B is locked to the concave portion 42A, and the right side surface 45 of the hub 42 is secured. By closing the open end of the recess 42 </ b> A with the brake disk 60 that is fastened to, and preventing the spoke 43 from coming off, rigidity can be ensured with a simple configuration.

  Further, according to the present embodiment, the rotation axis C1 of the rotor 15B and the rotation axis C2 of the rim 41 are arranged in parallel, and the rotor 15B is arranged at the center in the width direction of the hub 42. Balance can be equalized.

  Further, according to the present embodiment, the recess 42A is provided at the outer peripheral end of the hub 42, the brake disk 60 is provided so as to cover the recess 42A, and the brake disk 60 and the right side surface 45 of the hub 42 are provided. The fastening portion 49 is provided on the circumference connecting the plurality of concave portions 42A. With this configuration, the fastening portion 49 is provided on the outer peripheral end side of the hub 42, and the distance from the fastening portion 49 to the disk rotor 60A is shortened, so that the shearing force applied to the fastening portion 49 during braking can be reduced. Further, since the outer diameter of the brake disc 60 is increased and the pressure receiving area from the brake caliper 82 is increased, the frictional heat can be reduced. Further, since the brake caliper 82 is located on the outer peripheral side of the hub 42, the brake caliper 82 can be disposed above the spoke 43 inclined to the inside of the vehicle body in order to secure an elevation angle. It can be downsized in the vehicle width direction. In addition, since the fastening portion 49 is located in the vicinity of the recess 42A, the spoke 43 can be firmly held. Further, since the recess 42A is covered with the brake disc 60, the aesthetic appearance of the hub 42 can be improved.

  Further, according to the present embodiment, the brake disc 60 includes the disc rotor 60A and the fastening surface 60C fastened to the hub 42, and the disc rotor 60A is offset from the fastening surface 60C to the outside in the vehicle width direction. It was set as the composition. With this configuration, the space between the spoke 43 and the disk rotor 60A can be widened by an offset, so that a mounting space for the brake caliper 82 that brakes the disk rotor 60A can be secured.

However, the above embodiment is an aspect of the present invention, and it is needless to say that the embodiment can be appropriately changed without departing from the gist of the present invention.
For example, in the above embodiment, the disc plate 47 is attached to the left side surface 44 of the hub 42 and the brake disk 60 is attached to the right side surface 45 of the hub 42, but on the contrary, the disc 42 is attached to the left side surface 44 of the hub 42. While attaching the brake disc 60, the disc plate 47 may be attached to the right side surface 45 of the hub.

  In the above embodiment, the disc plate 47 is attached to the left side surface 44 of the hub 42 and the brake disk 60 is attached to the right side surface 45 of the hub 42. However, as shown in FIG. , 45 may be provided with a brake disc 60. With this configuration, the brake of the motorcycle 10 can be easily a double disc brake.

  Moreover, in the said embodiment, although the disk plate 47 was attached to the left side surface 44 of the hub 42, you may attach the driven sprocket 128 to the left side surface 44 of the hub 42, as shown in FIG. The driven sprocket 128 is a sprocket provided in place of the driven sprocket 28 (FIG. 2). The driven sprocket 128 is fastened to the left side surface 44 of the hub 42 by a fastening bolt 48, and extends from the fastening surface 128A into the chain case 30. The extending portion 128B to be extended and the gear portion 128C around which the chain 29 (FIG. 2) is wound are integrally formed from the radially inner side to the outer side. In this case, the fastening surface 128A of the driven sprocket 128 may be formed substantially the same as the fastening surface 60C of the brake disk 60 shown in FIG. 4, and the screw hole 42B, the through hole 128D of the fastening surface 128A, and the fastening bolt 48 are A fastening portion 49 of the driven sprocket 128 is configured.

Further, in the above embodiment, since the concave portions 42A for locking the head portions 43B of the spokes 43 are formed in the inclined portions 44B and 45B located at the outer peripheral side ends of the hub 42, as shown in FIG. A plurality of grooves 46A extending in the circumferential direction may be formed on the outer peripheral surface 46 between both inclined portions 44B and 45B of the hub 42, and cooling fins 46B may be provided in the circumferential direction. Thereby, the drive motor 15 arrange | positioned in the hub 42 can be cooled effectively.
In FIG. 8 and FIG. 9 showing the right side view of FIG. 8, the fastening portion 49 is provided on the flat surfaces 44A and 45A. However, as shown in FIG. It may be provided in the inclined portions 44B and 45B on E. Further, as shown in FIGS. 8 to 10, by arranging the fastening portion 49 between the adjacent concave portions 42 </ b> A, the fastening portion 49 is positioned closer to the concave portion 42 </ b> A, so that the spoke 43 can be held more firmly. .

  Moreover, in the said embodiment, although the recessed part 42A was formed in the substantially rectangular shape by the side view, and the head 43B of the spoke 43 was formed in the substantially hemispherical shape, as shown in FIG.9 and FIG.10, as shown in FIG.9 and FIG.10. May be formed in a substantially triangular shape in a side view, and the head 43B of the spoke 43 may also be formed in a substantially triangular prism shape in accordance with the triangular shape of the recess 42A. As a result, the cross-sectional shape of the concave portion 42A and the head 43B of the spoke 43 changes smoothly and becomes a flat shape, so that stress concentration in the concave portion 42A and the spoke 43 can be avoided and the hub 42 and the spoke 43 can be easily formed. Can be manufactured.

In the above embodiment, the drive motor 15 is provided on the front wheel 7. However, the drive motor 15 may be provided on the rear wheel 9, or the drive motor 15 may be provided on both the front wheel 7 and the rear wheel 9. .
In the above embodiment, the case where the present invention is applied to the wheel 40 of the hybrid motorcycle 10 using the engine 20 and the drive motor 15 as drive sources has been described. However, the present invention is not limited thereto, and only the engine is used as the drive source. The present invention can be widely applied to the wheel of an electric (EV) motorcycle using only a drive motor as a drive source.

DESCRIPTION OF SYMBOLS 10 Motorcycle 15 Drive motor 15B Rotor 15C Stator 40 Wheel 41 Rim 42 Hub 42A Recess 42B Screw hole 43 Spoke 43B Head 44 Left side surface (side surface, one side surface)
45 Right side (side, other side)
46 outer peripheral surface 46B cooling fin 47 disk plate 47A through hole 48 fastening bolt 49 fastening part 60 brake disc 60A disc rotor 60C fastening surface 60D through hole C1 rotating shaft C2 rotating shaft E circumference

Claims (9)

In a motorcycle wheel in which a rim (41) and a hub (42) are connected by a spoke (43),
The recess (42A) into which the head (43B) of the spoke (43) is inserted is opened at the outer peripheral side end of the hub (42), and the head (43B) is locked to the recess (42A). A wheel for a motorcycle, wherein a brake disk (60) fastened to a side surface (45) of the hub portion (42) closes an open end of the recess (42A) to prevent the spoke (43) from coming off. .   The wheel of a motorcycle according to claim 1, wherein brake disks (60) are attached to both side surfaces (44, 45) of the hub (42).   A disc plate (47) is attached to one side surface (44) of the hub (42), and the open end of the concave portion (42A) is closed with the disc plate (47) to prevent the spoke (43) from coming off. The motorcycle wheel according to claim 1.   The hub (42) has a hollow cylindrical shape composed of both side surfaces (44, 45) and an outer peripheral surface (46), and a drive motor (15) including a rotor (15B) and a stator (15C) is housed therein. The wheel of a motorcycle according to any one of claims 1 to 3.   The rotation axis (C1) of the rotor (15B) and the rotation axis (C2) of the rim (41) are arranged in parallel, and the rotor (15B) is arranged at the center in the width direction of the hub (42). The wheel of the motorcycle according to claim 4, wherein the wheel is a motorcycle. The recess (42A) is provided at an outer peripheral end of the hub (42),
The brake disc (60) is provided so as to cover the concave portion (42A), and a fastening portion (49) between the brake disc (60) and a side surface (45) of the hub (42) has a plurality of concave portions ( The wheel of a motorcycle according to any one of claims 1 to 5, characterized in that the wheel is provided on a circumference connecting 42A). The brake disc (60) includes a disc rotor (60A) and a fastening surface (60C) fastened to the hub (42).
The wheel of a motorcycle according to any one of claims 1 to 6, wherein the disk rotor (60A) is offset outward in the vehicle width direction from the fastening surface (60C).   The motorcycle according to any one of claims 4 to 7, wherein a cooling fin (46B) is provided in a circumferential direction between both ends of the hub (42) on an outer periphery of the hub (42). wheel.   9. The automatic according to claim 1, wherein the recess (42A) is formed in a triangular shape, and the head (43B) of the spoke (43) is also formed in accordance with the triangular shape. The wheel of a motorcycle.

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