JP2015205610A - Saddle-riding type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology that secures a wide arrangement space of an intake system and sufficiently secures the capacity of an intake chamber in a saddle-riding type vehicle including a steering damper.SOLUTION: In a motor cycle 10, a vehicle body frame 11 includes a steering damper 63. The steering damper 63 comprises: a cylinder 64; a piston 65 which slides in the cylinder 64; and a rod 66 extending from the piston 65. The cylinder 64 is attached to the vehicle body frame 11 through a protruding part 68, and the rod 66 is attached to a steering stem 27 through a bridge protruding part 78. The steering damper 63 is disposed at the front side of a head pipe 21 with a longitudinal direction of the steering damper 63 oriented to a vehicle fore and aft direction.

Description

  The present invention relates to an improvement of a saddle riding type vehicle provided with a steering damper.

  2. Description of the Related Art A straddle type vehicle is known that includes a steering damper that attenuates rotational fluctuations of a steering system received by front wheels (see, for example, Patent Document 1 (FIG. 2)).

  As shown in FIG. 2 of Patent Document 1, the bottom bridge (19) is rotatably supported by the head pipe (12) (the numbers in parentheses indicate the symbols described in Patent Document 1. The same shall apply hereinafter). A main frame (26) extends from the pipe (12) to the rear of the vehicle, and an intake system (50) (hereinafter referred to as "intake device (50)") is provided below the main frame (26). A steering damper (25) is provided between the bottom bridge (19) and the main frame (26) below the main frame (26).

  In the structure of Patent Document 1, if an air cleaner box is provided below the main frame behind the head pipe, the steering damper is disposed below the main frame, so there is a possibility that sufficient capacity of the air cleaner box cannot be secured. It was.

Similarly, when a case where an intake chamber is used instead of the air cleaner box is considered, since the steering damper is disposed below the main frame, there is a possibility that a sufficient capacity of the intake chamber cannot be secured.
There is a demand for a technique that can secure a wide space for arranging the intake device including the intake chamber and sufficiently ensure the capacity of the intake chamber.

JP 2012-218586 A

  An object of the present invention is to provide a technique capable of ensuring a wide space for arranging an intake device and sufficiently ensuring a capacity of an intake chamber in a saddle-ride type vehicle equipped with a steering damper.

  According to a first aspect of the present invention, a vehicle body frame includes a head pipe and a main frame extending from the head pipe to the rear of the vehicle, and a steering stem is pivotally supported by the head pipe, and a lower portion of the steering stem is In a saddle-ride type vehicle equipped with a bottom bridge, a front fork that rotatably supports a front wheel is supported on the bottom bridge, and a steering damper that attenuates a turning variation of a steering system that the front wheel receives on a body frame. The steering damper is composed of a cylindrical cylinder that constitutes a damper chamber, a piston that slides inside the cylinder, and a rod that extends from the piston. One of the cylinder and the rod is attached to the vehicle body frame, The other of the cylinder and rod is attached to the steering stem and Pa is disposed in front of the head pipe, the longitudinal direction of the steering damper is characterized in that it is arranged facing the vehicle longitudinal direction.

  According to a second aspect of the present invention, the vehicle body frame includes a head pipe and a main frame extending from the head pipe to the rear of the vehicle. A steering stem is pivotally supported by the head pipe, A bottom bridge is provided, a front fork that rotatably supports the front wheels is supported on the bottom bridge, an engine as a drive source is disposed below the main frame, an intake device is disposed above the engine, and the intake device In a straddle-type vehicle in which an intake chamber is disposed behind the main pipe and below the main frame and is provided with a steering damper that attenuates rotational fluctuation of the steering system received by the front wheels, the steering damper is the head pipe The intake chamber is located close to the head pipe And characterized in that it.

  In the invention according to claim 3, the protrusion extends from one of the vehicle body frame and the steering stem toward the front of the vehicle, and the steering damper is provided between the vehicle body frame and the other of the steering stem and the protrusion. Features.

  In the invention according to claim 4, the air duct for taking in the traveling wind from the intake chamber to the front of the vehicle extends, and the air duct is disposed so as to overlap the steering damper in a side view of the vehicle, and the steering damper has a cylindrical shape. The present invention is characterized by comprising a cylinder constituting a presentation damper chamber, a piston sliding in the cylinder, and a rod extending from the piston.

  In the invention according to claim 5, the intake chamber has a bulging portion, the bulging portion extends upward from the lower side of the main frame, and is disposed to face the side surface of the main frame. It is attached to the bulging part.

  The invention according to claim 6 is characterized in that the steering damper is disposed above the bottom bridge in a side view of the vehicle.

  The invention according to claim 7 is characterized in that the steering damper is disposed so as to overlap the head pipe when viewed from the front of the vehicle when in the neutral position.

  In the invention according to claim 8, the front of the head pipe is covered with a front cowl, the front cowl is inclined obliquely rearward and upward toward the rear of the vehicle, and the steering damper is disposed between the head pipe and the front cowl. It is arranged in

  In the invention according to claim 1, the steering damper is disposed in front of the head pipe. Compared to the structure in which the steering damper is disposed behind the head pipe, a space behind the head pipe can be secured. If the space behind the head pipe is widened, the degree of freedom of arrangement of each member can be increased. For example, when the intake chamber is disposed behind the head pipe, the capacity of the intake chamber to be disposed can be increased. In addition, since the amount of traveling wind that strikes the steering damper can be increased compared to the structure in which the steering damper is disposed behind the head pipe, the cooling effect of the steering damper can be enhanced.

  The steering damper is disposed such that the longitudinal direction of the steering damper faces the vehicle front-rear direction. That is, the longitudinal axis of the steering damper extends in the vehicle front-rear direction on a plane extending in the direction perpendicular to the axis of the steering stem. For this reason, for example, the stroke length of the steering damper can be easily increased as compared with a structure in which the longitudinal axis of the steering damper extends in the height direction. As a result, the damping force of the steering damper can be increased.

  In the invention according to claim 2, the steering damper is disposed in front of the head pipe, and the intake chamber is disposed in the rear of the head pipe. If the steering damper is arranged behind the head pipe, there is a possibility that the arrangement of the intake chamber arranged behind the head pipe may be restricted.

  In this regard, in the present invention, since the steering damper is disposed in front of the head pipe, the degree of freedom in arranging the intake chamber and other members can be increased. In addition, it is possible to arrange the intake chamber at a position close to the head pipe in order to conduct air smoothly, and to secure a large volume of the intake chamber. Further, the traveling wind from the front of the vehicle can be smoothly guided to the engine at a short distance.

  In the invention according to claim 3, the steering damper is provided between the other of the vehicle body frame and the steering stem and the protruding portion extending forward of the vehicle. Since the protrusion is extended forward of the vehicle body, the steering damper can be protected.

  In the invention which concerns on Claim 4, the air duct is extended to the vehicle front side of the steering damper arrange | positioned with the longitudinal direction facing the vehicle front-back direction. That is, by arranging the air duct on the side of the steering damper, it is possible to smoothly guide the traveling wind to the intake chamber while securing the air guide space to the intake chamber. Further, since the longitudinal direction of the steering damper is arranged in the vehicle front-rear direction, a large space between the air duct can be secured even when the steering system is steered and the steering damper strokes.

  In the invention which concerns on Claim 5, the intake chamber has a bulging part. With this bulging portion, the capacity of the intake chamber can be increased. Moreover, the length of an air duct can be shortened by attaching an air duct to a bulging part using a bulging part.

  In the invention according to claim 6, the steering damper is disposed above the bottom bridge. As a result, a long stroke of the steering damper can be secured without worrying that the steering damper interferes with the bottom bridge.

  In the invention according to claim 7, the steering damper is arranged so as to overlap the head pipe when in the neutral position. When the steering stem is rotated from the neutral position to the left side or the right side, the left and right damping force can be applied equally.

Conventionally, when the steering damper is not disposed so as to overlap the head pipe at the neutral position, that is, when the steering damper is not disposed along the center axis in the vehicle width direction, a link mechanism or the like is required. .
In this regard, according to the configuration of the present invention, a link mechanism or the like is not necessary, and the number of parts can be reduced.

  In the invention according to claim 8, the steering damper is disposed between the head pipe and the front cowl inclined obliquely rearward and upward. By inclining the front cowl, the steering damper can be efficiently arranged in the vehicle front-rear direction while effectively utilizing the space in front of the head pipe.

1 is a left side view of a motorcycle according to the present invention. It is the figure which removed the vehicle body cover which covers a vehicle front part in FIG. 1 is a front view of a motorcycle according to the present invention. FIG. 4 is a view of a main part of FIG. 3 with a vehicle body cover covering a front part of the vehicle removed. It is sectional drawing of a steering damper and its peripheral part. It is a side view of a steering damper and its peripheral part. It is a top view when it sees along the axial direction of a head pipe. FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 7. It is an operation explanatory view of the steering damper when the steering wheel is in the left-right neutral position. It is an operation explanatory view of a steering damper when a steering wheel is in a left steering position or a right steering position.

  Hereinafter, embodiments of the present invention will be described in detail. In the drawings and examples, “up”, “down”, “front”, “rear”, “left”, and “right” respectively indicate directions viewed from the driver who rides the motorcycle.

Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the motorcycle 10 includes a vehicle body frame 11, a front wheel steering unit 15 that supports the front wheel 13 at the front end of the vehicle body frame 11 in a steerable manner, and a rear wheel 14 that swings at the rear of the vehicle body frame 11. A rear wheel suspension portion 16 that is freely supported, an engine 17 as a drive source suspended on the vehicle body frame 11 between the front wheel 13 and the rear wheel 14, and an occupant seated between the front wheel 13 and the rear wheel 14. This is a straddle-type vehicle that includes a seat 18 and a passenger rides on the seat 18.

  The vehicle body frame 11 includes a head pipe 21, a single main frame 22 that extends rearward from the head pipe 21, a pivot frame 23 that extends downward from a longitudinal rear portion of the main frame 22, and the main frame 22. The main elements are a seat rail 24 that extends obliquely rearward and upward from the longitudinal rear portion, and a support frame 25 that is passed between the seat rail 24 and the pivot frame 23. The vehicle body frame 11 is a so-called mono-backbone frame in which one main frame 22 extends from the head pipe 21.

  The front wheel steering unit 15 includes a steering stem 27 pivotally supported by the head pipe 21, a bottom bridge 28 provided at a lower portion of the steering stem 27, and extends downward from the bottom bridge 28 to rotate the front wheel 13 at the lower end. The front fork 29 is freely supported, and the steering wheel 31 is attached to the upper end of the steering stem 27 and is steered by the occupant.

  The rear wheel suspension portion 16 extends horizontally in the vehicle width direction and is supported by the pivot frame 23. The swing shaft 16 extends from the pivot shaft 32 toward the rear of the vehicle and swings to support the rear wheel 14 at the rear end. The arm 33 includes a swing arm 33 and a cushion unit 34 that is passed between the seat rail 24.

  The engine 17 is disposed below the main frame 22 and is attached to the main frame 22 and the pivot frame 23. A cylinder block 37 extending from the crank case 36 toward the front of the vehicle and the cylinder block 37. A main component is a cylinder head 38 extending forward of the vehicle and a head cover 39 extending forward from the cylinder head 38. The engine 17 has a cylinder shaft 41 extending substantially horizontally in a direction in which a piston (not shown) slides.

  An intake device 42 is connected to the upper surface of the cylinder block 37, and an exhaust pipe 44 that is a component of the exhaust device 43 is connected to the lower surface of the cylinder block 37. A step 45 where the occupant puts his / her legs is attached to the crankcase 36.

  Next, the vehicle body cover will be described. The vehicle body cover 50 includes a handle cover 51 that covers the periphery of the handle 31, a front cowl 52 that covers the front of the head pipe 21 at a position below the handle 31, a leg shield 53 that covers the rear of the head pipe 21, and the leg shield 53. The main elements are a middle cowl 54 that extends rearward of the vehicle so as to cover the engine 17 and the intake device 42, and a rear cowl 55 that extends rearward from the middle cowl 54 and covers the rear side of the vehicle. A front fender 56 is attached to the front fork 29 above the front wheel 13, and a rear fender 57 is attached to the seat rail 24 above the rear wheel 14. A grab rail 58 is attached to the seat rail 24.

Next, the structure of the head pipe and its peripheral part will be described.
As shown in FIG. 2, the intake device 42 is disposed above the cylinder head 38 of the engine 17. An intake chamber 61 is disposed below the main frame 22 behind the head pipe 21 so as to surround the intake device 42.

  On the upper surface of the intake chamber 61, an air duct 62 that can take in the traveling wind is attached. The air duct 62 extends upward from the intake chamber 61 and then extends forward of the vehicle. The air duct 62 and the intake chamber 61 constitute a part of the intake device 42 and are included in the intake device 42.

  As shown in FIG. 3, the vehicle front side of the handle 31 is covered with a handle cover 51. The front part of the vehicle body is covered with the front cowl 52 described above under the handle cover 51. Here, the air duct 62 includes a left air duct 62L and a right air duct 62R on the left and right in the vehicle width direction. A silencer 47 as a component of the exhaust device 43 is connected to the rear end of the exhaust pipe 44 (see FIG. 1).

Next, the structure of the head pipe and its peripheral part will be described with reference to FIGS.
As shown in FIG. 4, a steering damper 63 is disposed between the left air duct 62L and the right air duct 62R in front of the head pipe 21 to attenuate the rotational fluctuation of the steering system (front wheel steering section 15) received by the front wheels 13. Has been. An oil cooler 82 that cools oil circulating in the engine 17 (see FIG. 1) is disposed in front of the head pipe 21 and above the left and right air ducts 62L and 62R and the steering damper 63. With such a configuration, when hot air rises due to the temperature rise of the oil cooler 82, the oil cooler 82 is placed in a limited space in front of the head pipe 21 while suppressing the thermal effect of the oil cooler 82 on the steering damper 63. Can be arranged efficiently.

  Oil paths 83a and 83b that connect the engine 17 to the lower end of the oil cooler 82 extend. A portion of the oil path 83a that extends horizontally in the vehicle width direction is attached to the head pipe 21 via fasteners 80 and 80 and an oil cooler stay 81 (see FIG. 6) described later.

  As shown in FIG. 5, the steering damper 63 is disposed in front of the head pipe 21 in the vehicle, and the longitudinal axis 63J of the steering damper 63 is disposed in the vehicle front-rear direction. This steering damper 63 attenuates the rotational fluctuation of the steering system (front wheel steering section 15) received by the front wheels 13. In the figure, 21J is the central axis of the head pipe 21 in the longitudinal direction. When the longitudinal central axis 21J of the head pipe 21 is extended rearward of the vehicle, the longitudinal central axis 21J of the head pipe 21 and the longitudinal central axis 63J of the steering damper 63 are orthogonal to each other.

  The steering damper 63 has a cylinder 64 that forms a damper chamber, a piston 65 that slides in the cylinder 64, and a rod 66 that extends from the piston 65 as main elements.

  Next, the mounting structure of the steering damper 63 will be described. A protrusion 68 extends forward from the head pipe 21, which is a component of the vehicle body frame 11, and a collar member 69 extends downward from the front end of the protrusion 68. A front end portion of the steering damper 63 is attached to the lower end of the collar member 69. Referring also to FIG. 4, the protrusion 68 is a U-shaped plate member opened upward. On the other hand, a bridge protrusion 78 extends from the bottom bridge 28 to the front of the vehicle, and a rear end portion of the steering damper 63 is attached to the bridge protrusion 78.

  The front end portion of the cylinder 64 constituting the steering damper 63 is attached to the lower end of the collar member 69. More specifically, a female screw is formed on the collar member 69, the end of the cylinder 64 is brought into contact with the lower end of the collar member 69, and is fastened by a fastening screw 71 from below.

  The bottom bridge 28 is provided integrally with the steering stem 27, and a bridge protrusion 78 is inserted into the bottom bridge 28. The bridge projecting portion 78 is inserted into the bottom bridge 28 and provided integrally therewith, a horizontal portion 73 extending substantially forward from the base portion 77 to the vehicle, and extending upward from the front end of the horizontal portion 73. The through-hole 75 is provided in the vertical portion 74 in the height direction, a screw portion 76 is formed in the lower portion of the through-hole 75, and the end portion of the rod 66 is formed at the upper end of the vertical portion 74. The rod 66 is fastened to the vertical portion 74 by fastening bolts 72 from above.

  In this embodiment, the cylinder is attached to the protrusion attached to the head pipe and the rod is attached to the bridge protrusion attached to the steering stem. However, the cylinder is attached to the steering stem and the rod is attached to the head pipe. It does not matter if it is installed on the top. Further, a protrusion may be provided on the steering stem above or below the head pipe, and a rod or cylinder may be attached to the protrusion, and the other of the rod or cylinder may be attached to the vehicle body frame.

  The front of the head pipe 21 is covered with a front cowl 52. The front cowl 52 is inclined obliquely rearward and upward toward the rear of the vehicle, and the steering damper 63 is disposed between the head pipe 21 and the front cowl 52. The head pipe 21 supports the steering stem 27 via upper and lower bearings 59a and 59b so as to be rotatable.

  The steering damper 63 is disposed between the head pipe 21 and the front cowl 52 inclined obliquely rearward and upward. By inclining the front cowl 52, the steering damper 63 can be efficiently disposed in the vehicle front-rear direction while effectively utilizing the space in front of the head pipe 21.

  In addition, the steering damper 63 is disposed above the bottom bridge 28. As a result, a long stroke of the steering damper 63 can be ensured without worrying that the steering damper 63 interferes with the bottom bridge 28.

  As shown in FIG. 6, a protrusion 68 extends forward from the head pipe 21, which is a component of the vehicle body frame 11, and a bridge protrusion 78 extends forward from the bottom bridge 28 of the front wheel steering portion 15. . The steering damper 63 is provided between the protrusion 68 and the bridge protrusion 78. The steering damper 63 is disposed above the bottom bridge 28 in the vehicle side view. An air duct 62 extends from the intake chamber 61 to the front of the vehicle so as to overlap the steering damper 63 in a side view of the vehicle.

  An oil cooler stay 81 is fixed to the head pipe 21 above the protruding portion 68, and an oil cooler 82 is attached to the oil cooler stay 81 via a fastener 80.

  Next, the intake device will be described. The intake device 42 includes a throttle body 84 connected to the engine 17, a funnel 85 attached to the upper portion of the throttle body 84 and taking in outside air, an intake chamber 61 provided so as to surround the throttle body 84 and the funnel 85, An air duct 62 extending from the intake chamber 61 to the front of the vehicle is a main element.

  As shown in FIG. 7, a protrusion 68 extends from the head pipe 21 toward the front of the vehicle. A steering damper 63 is disposed below the protrusion 68 at a position overlapping the protrusion 68. Since the protrusion 68 extends forward from the head pipe 21, the steering damper 63 can be protected by the protrusion 68. The steering damper 63 includes a damper adjustment unit 87 on the left side of the cylinder 64 and a sub tank 88 on the right side of the cylinder 64. The intake chamber 61 is attached to the main frame 22 via fastening members 67 and 67.

  The left and right air ducts 62L and 62R extend forward of the vehicle on the side of the steering damper 63 that is disposed with the longitudinal direction facing the vehicle longitudinal direction. That is, by arranging the left and right air ducts 62L and 62R on the side of the steering damper 63, it is possible to smoothly guide the traveling wind to the intake chamber 61 while securing the air guiding space to the intake chamber 61. Referring also to FIG. 4, the steering damper 63 is disposed so as to overlap the head pipe 21 when the front wheel steering unit 15 is in the left-right neutral position when viewed from the front of the vehicle.

  As shown in FIG. 8, the intake chamber 61 extends from the lower side of the main frame 22 and has left and right bulging portions 89 </ b> L and 89 </ b> R arranged to face the side surfaces 22 </ b> L and 22 </ b> R of the main frame 22. Openings 90L and 90R are respectively provided on the upper surfaces of the left and right bulging portions 89L and 89R. The left and right air ducts are formed on the upper surfaces of the left and right bulging portions 89L and 89R in accordance with the positions of the openings 90L and 90R. 62L and 62R are respectively attached.

  The intake chamber 61 has left and right bulging portions 89L and 89R. The volume of the intake chamber 61 can be increased by the left and right bulging portions 89L and 89R. Moreover, the length of the air ducts 62L and 62R can be shortened by attaching the left and right air ducts 62L and 62R to the bulging portions 89L and 89R using the bulging portions 89L and 89R.

The operation of the saddle riding type vehicle described above will be described next.
Returning to FIG. 6, the steering damper 63 is disposed in front of the head pipe 21. Compared to the structure in which the steering damper 63 is disposed behind the head pipe 21, a large space behind the head pipe 21 can be secured. If the space behind the head pipe 21 is widened, the degree of freedom of arrangement of each member can be increased.

  In addition, the capacity of the intake chamber 61 and the like disposed behind the head pipe 21 can be increased. Further, since the amount of traveling wind that strikes the steering damper 63 can be increased compared to the structure in which the steering damper 63 is disposed behind the head pipe 21, the cooling effect of the steering damper 63 can be enhanced.

  An intake chamber 61 is disposed behind the head pipe 21. If the steering damper 63 is disposed behind the head pipe 21, there is a possibility that the arrangement of the intake chamber 61 disposed behind the head pipe 21 may be restricted.

  In this regard, in the present invention, since the steering damper 63 is disposed in front of the head pipe 21, the degree of freedom of arrangement of the intake chamber 61 and other members can be increased. In addition, a large volume of the intake chamber 61 can be secured. If the volume of the intake chamber 61 can be increased, the response of the engine 17 to the accelerator work can be enhanced.

Next, the operation of the steering damper will be described.
As shown in FIG. 9, when the handle is in the left-right neutral position, the vehicle width direction central axis W0 and the longitudinal axis 63J of the steering damper 63 are in a straight line. That is, the steering damper 63 is disposed so as to overlap the head pipe 21 when the steering wheel is in the left-right neutral position.

  FIG. 10A is an operation diagram of the steering damper when the steering is in the left steering position, and FIG. 10B is an operation diagram of the steering damper when the steering is in the right steering position.

  10A, when the steering wheel 31 (see FIG. 1) is steered to the left, the rod 66 of the steering damper 63 tries to jump out of the cylinder 64. By the action of the steering damper 63, front wheel steering including the bottom bridge 28 is performed. Rapid rotation of the portion 15 is suppressed. Even when a force is applied in the right steering direction from the left-steered position, the steering damper 63 can suppress the sudden rotation of the front wheel steering unit 15 including the bottom bridge 28.

  In FIG. 10B, when the steering wheel 31 (see FIG. 1) is steered to the right, the rod 66 of the steering damper 63 tries to jump out of the cylinder 64, but the action of the steering damper 63 causes the bottom bridge 28 to rotate rapidly. The movement is suppressed. Further, even when a force is applied in the left steering direction from the right-steered position, the steering damper 63 can suppress the sudden rotation of the front wheel steering unit 15 including the bottom bridge 28 due to the action of the steering damper 63.

  4 and 9 together, the steering damper 63 is disposed so as to overlap the head pipe 21 when in the left-right neutral position. When the steering stem 27 is rotated from the neutral position to the left side or the right side, the left and right damping force can be applied equally.

Conventionally, when the steering damper is not arranged so as to overlap the head pipe in the neutral position, that is, when the steering damper extends from the central axis in the vehicle width direction to either the left or right side, a link mechanism or the like Was sometimes necessary.
In this regard, according to the configuration of the present invention, a link mechanism or the like is not necessary, and the number of parts can be reduced.

  Although the present invention is applied to a motorcycle in the embodiment, it can also be applied to a tricycle and can be applied to a general vehicle.

  The present invention is suitable for a motorcycle equipped with a steering damper.

  DESCRIPTION OF SYMBOLS 10 ... Saddle-type vehicle (motorcycle), 11 ... Body frame, 13 ... Front wheel, 15 ... Steering system (front wheel steering part), 17 ... Engine, 21 ... Head pipe, 22 ... Main frame, 27 ... Steering stem, 28 ... bottom bridge, 29 ... front fork, 42 ... intake device, 52 ... front cowl, 61 ... intake chamber, 62 (62L, 62R) ... air duct, 63 ... steering damper, 64 ... cylinder, 65 ... piston, 66 ... rod, 68 ... Projection part, 89L, 89R ... Left and right bulging parts.

Claims (8)

The vehicle body frame (11) includes a head pipe (21) and a main frame (22) extending from the head pipe (21) to the rear of the vehicle, and the steering stem (27) is rotatable to the head pipe (21). And a bottom bridge (28) is provided below the steering stem (27), and a front fork (29) that rotatably supports a front wheel (13) is supported on the bottom bridge (28). In a straddle-type vehicle in which a frame (11) is provided with a steering damper (63) that attenuates rotational fluctuations of a steering system (15) received by the front wheel (13).
The steering damper (63) has a cylindrical shape and forms a damper chamber, a piston (65) that slides in the cylinder (64), and a rod (65) that extends from the piston (65). 66), one of the cylinder (64) and the rod (66) is attached to the vehicle body frame (11), and the other of the cylinder (64) and the rod (66) is the steering stem (27). ) And
The saddle riding type characterized in that the steering damper (63) is disposed in front of the head pipe (21), and the longitudinal direction of the steering damper (63) is disposed in the vehicle front-rear direction. vehicle. The vehicle body frame (11) includes a head pipe (21) and a main frame (22) extending from the head pipe (21) to the rear of the vehicle, and the steering stem (27) is rotatable to the head pipe (21). And a bottom bridge (28) is provided at the bottom of the steering stem (27), and a front fork (29) for rotatably supporting a front wheel (13) is supported on the bottom bridge (28). An engine (17) as a drive source is disposed below the frame (22), and an intake device (42) is disposed above the engine (17), and is connected to the intake device (42) and connected to the head pipe (21 ), An intake chamber (61) is disposed below the main frame (22), and a steering system (15) received by the front wheels (13). Straddle type vehicle steering damper (63) is provided for attenuating the rotation variation of,
The straddle-type vehicle, wherein the steering damper (63) is disposed in front of the head pipe (21), and the intake chamber (61) is close to the head pipe (21). A protrusion (68) extends forward from one of the body frame (11) and the steering stem (27),
The saddle riding according to claim 1, wherein the steering damper (63) is provided between the vehicle body frame (11), the other of the steering stem (27), and the protrusion (68). Type vehicle. Air ducts (62L, 62R) for taking in wind from the intake chamber (61) to the front of the vehicle extend,
The air ducts (62L, 62R) are arranged so as to overlap the steering damper (63) in a vehicle side view,
The steering damper (63) has a cylindrical shape and forms a damper chamber, a piston (65) that slides in the cylinder (64), and a rod (65) that extends from the piston (65). 66), and the longitudinal direction of the steering damper (63) is arranged in the vehicle front-rear direction. The intake chamber (61) has a bulging portion (89L, 89R),
The bulging portions (89L, 89R) extend upward from below the main frame (22), and are disposed opposite to the side surface of the main frame (22).
The straddle-type vehicle according to claim 4, wherein the air duct (62L, 62R) is attached to the bulging portion (89L, 89R).   The straddle-type vehicle according to any one of claims 1 to 5, wherein the steering damper (63) is disposed above the bottom bridge (28) in a side view of the vehicle.   The said steering damper (63) is arrange | positioned so that it may overlap with the said head pipe (21) by the vehicle front view when it exists in a neutral position. Saddle riding type vehicle. The front of the head pipe (21) is covered with a front cowl (52),
The front cowl (52) is inclined obliquely rearward and upward toward the rear of the vehicle,
The straddle-type vehicle according to any one of claims 1 to 7, wherein the steering damper (63) is disposed between the head pipe (21) and the front cowl (52).

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