JP2012183891A - Front structure of saddle-ride type vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a front structure of a saddle-ride type vehicle capable of reducing effect on rigidity variation of a fork member.SOLUTION: A saddle-ride type vehicle 10 includes: a lower bumper 73 provided at a vehicle rear side of a front wheel 17; and a tire rear cover 72 mounted to fork members 15 so as to cover the rear of the front wheel 17 and in contact with the lower bumper 73 when the front wheel 17 moves backward in the vehicle. The tire rear cover 72 comprises: a body 101; first arms 95 extending from one side and the other side of the body 101 in a vehicle width direction to the respective fork members 15; and second arms 96 having rigidity smaller than the first arms 95. The second arm 96 is mounted to the fork member 15 via an elastic member 115.

Description

  The present invention relates to an improvement in the front structure of a saddle-ride type vehicle.

  A saddle-ride type vehicle is provided with a tire rear cover that moves with the front wheel and contacts a lower bumper provided on the vehicle body side when an excessive load is input to the front wheel and the front wheel moves rearward, behind the front wheel of the vehicle. (For example, refer to Patent Document 1 (FIG. 4).)

  As shown in FIG. 4 of Patent Document 1, a front wheel (28L, 28R) (numbers in parentheses indicate symbols described in Patent Document 1. The same shall apply hereinafter) is provided at the front of the vehicle. 14), a lower bumper (31) disposed on the rear side of the front wheel (14) and having a bumper surface (35), and a front wheel attached to the fork members (28L, 28R) so as to cover the rear side of the front wheel (14). A tire rear cover (30) that contacts the lower bumper (31) when (14) moves backward in the vehicle is provided.

  The tire rear cover (30) includes a cover portion (30a) and arm portions (30b, 30b) that extend from the cover portion (30a) and are respectively connected to the left and right fork members (28L, 28R). That is, the tire rear cover (30) is passed between the left and right fork members (28L, 28R). In order to suppress vibration of the tire rear cover (30) including the support arms (30b, 30b), the support arms (30b, 30b) need to have a predetermined rigidity.

However, if the rigidity of the support arms (30b, 30b) increases, the rigidity of the fork members (28L, 28R) also increases. As the rigidity of the fork members (28L, 28R) increases, the riding comfort of the vehicle also changes. This is inconvenient if you do not want to change the ride quality of the vehicle.
A technique capable of reducing the influence on the change in rigidity of the fork member is desired.

JP 2010-254278 A

  An object of the present invention is to provide a front structure of a saddle-ride type vehicle that can reduce an influence on a change in rigidity of a fork member.

  The invention according to claim 1 is a vehicle body frame having a head pipe at the front of the vehicle, a power unit fastened to the vehicle body frame, a fork member that is steerably connected to the head pipe, and a lower part of the fork member. A front bumper mounted on the fork member so as to cover the rear of the front wheel, a lower bumper having a bumper surface that is disposed behind the front wheel and is inclined with respect to the vehicle cross axis perpendicular to the longitudinal axis of the vehicle. And a tire rear cover that comes into contact with the lower bumper when the vehicle moves backward in the rear of the vehicle, wherein the tire rear cover is a plate-shaped main body curved along the tire of the front wheel A first arm portion extending from one side of the main body portion in the vehicle width direction to the fork member, and a lower rigidity than the first arm portion in the vehicle width direction of the main body portion. The second arm part consists of extending the fork member, the second arm portion, characterized in that via an elastic member is attached to the fork member.

  In the invention according to claim 2, one end of the bumper surface that is inclined with respect to the cross axis is disposed rearward of the vehicle with respect to the other end, the first arm portion is disposed on one end side of the bumper surface, The second arm portion is disposed on the other end side, and the first arm portion is joined to the main body portion bent in the vehicle longitudinal direction from the rear end portion extending in the vehicle longitudinal axis direction and the rear end of the front and rear extension portion. It is characterized by having a bent portion.

  In the invention according to claim 3, the first arm part is welded to the main body part and is welded to the main body part through the lower pipe-like member and is extended from the main body part to the fork member. And a lower pipe-like member extending to the member.

  The invention according to claim 4 is characterized in that the second arm portion is a single plate-like member.

  In the invention according to claim 1, the vehicle front portion includes a tire rear cover attached to the fork member so as to cover the rear of the front wheel, and a bumper surface inclined to the vehicle cross shaft behind the tire rear cover. And a lower bumper.

  When the front wheel is retracted due to the force applied to the rear of the vehicle and the rear cover of the tire that has been retracted together with the front wheel contacts the bumper surface of the lower bumper, the bumper surface of the lower bumper is inclined with respect to the vehicle cross axis. The rear cover moves along the inclined bumper surface.

  In this case, if the tire rear cover extending in the vehicle width direction one side and the other side of the fork member has high rigidity, the first and second arm portions of the tire rear cover respectively include one of the fork members and Since it is connected to the other, the rigidity of the fork member is increased. If the rigidity of the fork member increases, the ride comfort changes, so the rigidity (strength) of the fork member may need to be reviewed.

  In this regard, in the present invention, the tire rear cover includes a second arm portion that extends toward the fork member and has lower rigidity than the first arm portion. Further, the second arm portion is attached to the fork member via an elastic member. That is, the tire rear cover is substantially cantilevered by the first arm portion on one of the fork members.

  When the tire rear cover comes into contact with the bumper surface, the second arm portion on the lower rigidity side is mainly deformed. With such a tire rear cover, even if the tire rear cover is structured to be passed to both ends of the fork member, the influence on the change in rigidity of the fork member can be reduced.

In the invention which concerns on Claim 2, the 1st arm part is arrange | positioned at the one end side of the bumper surface arrange | positioned rather than the other end of a bumper surface, and the 2nd arm part is arrange | positioned at the other end side of a bumper surface. Yes.
The main body portion of the tire rear cover moves while the front wheels are steered along the bumper surface while abutting against the bumper surface. Since the main body part and the second arm part on the elastically supported side are brought into contact with the bumper surface, the first arm part having higher rigidity than the second arm part is brought into contact with the bumper surface. Thus, the front wheels can be steered and moved smoothly.

In addition, the first arm portion has a bent portion that is bent so as to face the vehicle width direction and joined to the main body portion.
By providing the bent portion in the first arm portion, the first arm portion can be brought close to the tire, so that the size of the main body portion can be made as compact as possible. Further, since the bent portion is disposed on the opposite side of the bumper surface with respect to the center in the vehicle width direction, contact between the bumper and the bent portion can be avoided.

  In the invention which concerns on Claim 3, a 1st arm part is comprised with the pipe-shaped member arrange | positioned in parallel in the height direction, and these pipe members are each welded to the main-body part. Since the 1st arm part is comprised by the pipe-shaped member arrange | positioned in parallel up and down, the rigidity with respect to the force concerning a height direction can be improved.

  In the invention which concerns on Claim 4, a 2nd arm part is one plate-shaped member. With such a locking arm, the locking arm can be configured with a simple configuration, and the cost of the vehicle can be kept low.

1 is a left side view of a motorcycle according to the present invention. It is a principal part enlarged view of FIG. FIG. 3 is a view taken in the direction of arrow 3 in FIG. 2. It is a bottom view of the tire back cover concerning the present invention. It is sectional drawing explaining the attachment structure of a 1st arm part and a 2nd arm part. It is operation | movement explanatory drawing of a tire rear cover. It is action explanatory drawing when the rolling direction of a front wheel is steered in the direction opposite to the direction of a bumper surface. It is operation | movement explanatory drawing of a tire rear cover when a front wheel contact | abuts to a target object. It is operation | movement explanatory drawing of a tire rear cover when a front bumper contact | abuts to the target object.

  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. The drawings are viewed in the direction of the reference numerals.

Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a motorcycle 10 includes a head pipe 12 provided at a front end portion 11a of a vehicle body frame 11 and a steering pipe provided on the head pipe 12 via a steering shaft 13 serving as a steering axis. A steering wheel 13, a fork member 15 connected to the steering shaft 13 and having a cushioning function for absorbing vibration received by the vehicle from the road surface, a front wheel axle 16 passed between the lower ends of the fork member 15, and the front wheel axle A front wheel 17 rotatably attached to 16, main frames 21 </ b> L and 21 </ b> R (only 21 </ b> L on the front side in the drawing) extended from the head pipe 12 to the rear and right and left, and these main frames 21 </ b> L and 21 </ b> R Engine 22 as a power unit supported by the main frame 21L, 21R provided at the rear and lower part of the main frame 21L, 21R Pivot portions 25L and 25R (only the front side 25L is shown), seat frames 33L and 33R (only the front side 33L shown) extending rearward from these pivot portions 25L and 25R, and the pivot portion 25L , 25R, a pivot shaft 26, a rear swing arm 27 extending rearward from the pivot shaft 26, and a pivot shaft 26 provided between the rear swing arm 27 and the main frames 21L, 21R. The rear cushion unit 28 and the link mechanism 32 that support the rear swing arm 27 so as to be able to swing around the rear wheel axle 29, the rear wheel axle 29 provided at the rear end of the rear swing arm 27, and the rear wheel axle 29 can be rotated. The main element is a rear wheel 31 as a drive wheel attached to the vehicle. That is, the front wheel 17 is connected to the front portion of the body frame 11 so as to be steerable, and the engine 22 as a power unit is supported on the body frame 11.

The motorcycle 10 includes a fuel tank 36 that is provided above the left and right main frames 21L and 21R and stores fuel supplied to the engine 22, an airbag module 37 that is disposed above and behind the fuel tank 36, and a main frame. Seat frames 33L and 33R extending rearward from rear end portions 21Lb and 21Rb (only 21Lb on the front side of the figure) 21L and 21R, and a seat 34 supported by these seat frames 33L and 33R and seated by an occupant , And a saddle-ride type vehicle in which an occupant rides on the seat 34.
An airbag module 37 is disposed above the fuel tank 36 in front of the seat 34.

The fuel tank 36 that stores fuel to be supplied to the engine 22 has front portions attached to the main frames 21L and 21R, and rear portions attached to the seat frames 33L and 33R via the stays 30.
The airbag module 37 is disposed on the upper rear side 36 b of the fuel tank 36. The airbag module 37 is attached to vehicle body side stays 44L and 44R (only the reference numeral 44L on the front side is shown) extending from the main frames 21L and 21R. That is, the vehicle body side stays 44 </ b> L and 44 </ b> R are members that connect the airbag module 37 to the vehicle body frame 11. An airbag is folded on the airbag module 37.

  The exhaust system includes a plurality of exhaust pipes 52 extending from the engine 22, a collecting part 53 where the exhaust pipes 52 gather below the engine 22, a rear exhaust pipe 54 extending from the collecting part 53 to the rear of the vehicle, And a silencer 55 connected to the rear end of the rear exhaust pipe 54.

  Side mirrors 58 </ b> L and 58 </ b> R (only the reference numeral 58 </ b> L on the front side of the drawing is shown) are attached to the front cowl 36 and a headlight 59 is attached. A front fender 61 is attached to the fork member 15. A radiator 62 is attached to the lower part of the main frame, and a radiator shroud 63 for guiding the flow of wind is provided behind the radiator 62. A main stand 65 is attached to the pivot portions 25L and 25R, and a meter unit 66 is provided at the vehicle front position of the steering handle 14. In the figure, G is the center of gravity of the vehicle.

  Hereinafter, the bumper provided in the front part of the vehicle will be described. The bumper 70 includes a front bumper 71 that extends forward from the main frames 21L and 21R, a tire rear cover 72 that extends rearward from the lower portion of the fork member 15 and is positioned behind the front wheel 17, and forward from the lower portion of the engine 22. A lower bumper 73 that is extended and positioned behind the tire rear cover 72.

  The front bumper 71 extends from the left and right main frames 21L, 21R to the front of the vehicle. The front bumper 71 is a member that can receive a load applied to the front portion of the vehicle, and is also a support portion of the main cowl 18.

  The front bumper 71 has a front end 71a provided behind the front end 17a of the front wheel 17 and in front of the head pipe 12 when the vehicle is viewed from the side, below the headlight 59 that illuminates the front of the vehicle. Is arranged. The front bumper 71 is disposed above the center of gravity G of the vehicle.

  The lower bumper 73 is a member that guides the vehicle rearward while turning the front wheel 17 when an excessive load is input to the front wheel 17 from the lower part of the engine 22 to the front of the vehicle. At the front position of the lower bumper 73, a tire rear cover 72 that is attached to the fork member 15 so as to cover the rear of the front wheel 17 and contacts the lower bumper 73 when the front wheel 17 moves backward in the vehicle is extended.

  The tire rear cover 72 is a member that covers the rear of the front wheel 17. When the front wheel 17 receives an excessive load and moves rearward of the vehicle, the tire rear cover 72 comes into contact with the lower bumper 73 so that the tire 19 and the lower bumper 73 of the front wheel 17 are brought into contact with each other. This is a member provided to avoid direct contact.

  The tire 19 is made of rubber, and the friction coefficient between the rubber and the metal is usually larger than the friction coefficient between the metal and the metal under the same conditions. As a countermeasure, the tire rear cover 72 is attached to the front wheel 17 so that the front wheel 17 moves the bumper surface 74 of the lower bumper 73 more smoothly.

Hereinafter, the main part of the front structure of the motorcycle will be described with reference to FIGS.
As shown in FIG. 2, a front wheel axle 16 is passed horizontally to the lower end of the fork member 15, and a front wheel 17 including a wheel 81 and a tire 19 is rotatably attached to the front wheel axle 16. Brake disks 83L and 83R (only the reference numeral 83L on the front side of the figure is shown) are fastened.

  Brake calipers 84L and 84R provided on the fork member 15 so as to sandwich the front fender 61 and the brake disks 83L and 83R that cover the upper part of the front wheel 17 and prevent the mud splashed by the front wheel 17 (reference numerals on the front side in the figure) 84L only), and a tire rear cover 72 that contacts the lower bumper 73 when the front wheel 17 moves backward in the vehicle.

  The fork member 15 includes bottom cases 91L and 91R (only the reference numeral 91L on the front side of the drawing is shown) at the bottom, and caliper brackets 92L and 92R (with brake calipers 84L and 84R attached to the lower ends of the bottom cases 91L and 91R ( Only the reference numeral 92L on the front side of the figure is shown). Brake calipers 84L, 84R and a tire rear cover 72 are attached to caliper brackets 92L, 92R located at the lower end of the fork member 15.

  As shown in FIG. 3, a lower bumper 73 is disposed at a rear position of the tire rear cover 72. The lower bumper 73 has a receiving member 93 at the front, and a bumper surface 74 is provided on the front surface of the receiving member 93. The bumper surface 74 is a surface inclined with respect to the vehicle cross axis W orthogonal to the vehicle longitudinal axis L. A left end 74L, which is one end of the bumper surface 74 that is inclined with respect to the cross axis W, is disposed behind the right end 74R, which is the other end.

  The tire rear cover 72 disposed in front of the lower bumper 73 includes a first arm portion 95 at a position corresponding to the left end side of the bumper surface 74, and a second arm portion 96 at a position corresponding to the right end side of the bumper surface 74. I have. Details of the tire rear cover 72 will be described with reference to the following drawings.

Next, the configuration of the tire rear cover will be described.
As shown in FIG. 4, the tire rear cover 72 includes a plate-like main body portion 101, a first arm portion 95 extending from the left side 101 </ b> L as one side of the main body portion 101 in the vehicle width direction, and the first arm portion 95. The second arm portion 96 has a lower rigidity and extends from the right side 101R as the other side of the main body portion 101 in the vehicle width direction.
The first arm portion 95 includes a longitudinally extending portion 103 extending in the L direction serving as a longitudinal axis of the vehicle, and a bent portion 104 that is bent from the rear end 103b of the longitudinally extending portion toward the vehicle width direction and joined to the main body portion. .

  Returning to FIG. 3, the main body 101 of the tire rear cover 72 is a plate-like member curved along the front tire 82. The first arm portion 95 is a member that extends from the left side of the main body portion 101 in the vehicle width direction to the fork member 15. The second arm portion 96 is a member that extends from the right side of the main body portion 101 in the vehicle width direction to the fork member 15.

  Returning to FIG. 2, the first arm portion 95 of the tire rear cover 72 is welded to the main body portion 101 and extends from the main body portion 101 to the fork member 15, and below the upper pipe-shaped member 105. And a lower pipe-like member 106 which is welded to the main body 101 and extends from the main body 101 to the fork member 15. The second arm portion 96 is a single plate member.

  The first arm portion 95 is composed of pipe-like members 105 and 106 arranged in parallel in the height direction, and these pipe-like members 105 and 106 are welded to the main body portion 101, respectively. Since the first arm portion 95 is composed of the upper and lower pipe-like members 105 and 106 arranged in parallel in the vertical direction, the rigidity against the force applied to the tire rear cover 72 in the height direction can be improved.

  Further, the second arm portion 96 of the tire rear cover 72 is a single plate-like member. If it is such a 2nd arm part 96, the 2nd arm part 96 can be comprised with a simple structure, and the cost increase of a vehicle can be suppressed low.

Next, a structure for attaching the tire rear cover to the front fork will be described.
As shown in FIG. 5, the upper collar member provided with a recess 111 a into which the first upper fastening bolt 107 can be screwed from the outside in the vehicle width direction at the front end 105 a of the upper pipe-shaped member constituting one of the first arm portions 95. 112a is welded. A front end 105a of the upper pipe-shaped member is attached to the caliper bracket 92L via the upper collar member 112 and the first upper fastening bolt 107.

  Similarly, a lower collar member 112b having a concave portion 111b into which the first lower fastening bolt 108 can be screwed from the outside in the vehicle width direction is welded to the front end 106a of the lower pipe-shaped member constituting the other of the first arm portion 95. ing. The front end 106a of the lower pipe member is attached to the caliper bracket 92L via the lower collar member 112b and the first lower fastening bolt 108.

  A hole 114 is formed in the front end 96a of the second arm portion, an elastic member 115 is inserted into the hole 114, and a holding member 117 that holds the elastic member 115 is fitted into a small hole 116 formed in the center of the elastic member 115. The collar 118 is applied to the inside of the holding member 117 in the vehicle width direction, and the front end 96a of the second arm portion is attached to the caliper bracket 92R via the second fastening bolt 109 from the outside in the vehicle width direction. That is, the second arm portion 96 is attached to the fork member 15 via the elastic member 115.

The operation of the tire rear cover described above will be described next. 6-7 is the figure which looked at the steering bumper and its peripheral part from the downward direction.
As shown in FIG. 6A, the bumper surface 74 is inclined by θ with respect to the cross axis W. The front wheel 17 is not displaced, and the front wheel 17 and the lower bumper 73 are separated from each other.
In the figure, reference numeral 95 denotes a cross pipe portion 133 arranged in parallel to the front surface 132 of the engine.

  As shown in FIG. 6 (b), when the front wheel 17 moves rearward when the vehicle receives a large load from the front, the front wheel 17 is inclined with respect to the longitudinal axis of the vehicle to guide the front wheel 17. It hits the surface 74 and moves backward in the direction of the arrow b, that is, while being steered to the right. Therefore, when the front wheel 17 moves rearward, the tire rear cover 72 provided at the rear position of the front wheel 17 contacts the bumper surface 74, and the front wheel 17 and the tire rear cover 72 move along the bumper surface 74. To do.

As shown in FIG. 6C, the front wheel 17 is further displaced and moves further rearward along the bumper surface 74.
Since the front wheel 17 is deflected rearward by the bumper surface 74, the front wheel 17 does not directly contact the engine 22 disposed behind the front wheel 17, and the front wheel 17 can be sufficiently displaced rearward. Since a sufficient amount of displacement is ensured in the front wheel 17, when the vehicle receives a large load from the front, the load can be smoothly absorbed by the front fork 15 or the like.

A first arm portion 95 is disposed on the left end side of the bumper surface 74 disposed at the rear of the vehicle with respect to the right end which is the other end of the bumper surface, and a second arm portion 96 is disposed on the right end side of the bumper surface.
The tire rear cover 72 moves while the front wheel 17 is steered along the bumper surface 74 while contacting the bumper surface 74. Since the main body portion 101 of the tire rear cover 72 and the second arm portion 96 on the elastically supported side are brought into contact with the bumper surface 74, the first arm portion 95 having higher rigidity than the second arm portion 96. Compared with the case where abuts against the bumper surface 74, the front wheel 17 can be steered and moved smoothly.

In addition, the first arm portion 95 has a bent portion 104 that is bent so as to face the vehicle width direction and joined to the main body portion 101.
If the bent portion is not provided in the first arm portion, a force in a direction perpendicular to the axial direction of the first arm is applied to the first arm, so that the first arm portion is likely to be deformed.

  In this respect, in the present invention, the direction of the force applied to the bent portion 104 is close to the vehicle width direction, so that the first arm portion 95 is deformed compared to the case where the first arm portion is not provided with a bent portion. The force applied to the main body 101 can be received by the first arm portion 95 and can be reliably held.

The operation of the tire rear cover 72 when the front wheel 17 faces forward when contacting the lower bumper 73 has been described above. The same effect is obtained when the front wheel 17 is steered to the right when it contacts the lower bumper 73.
Contrary to the above, the operation in the case where the front wheel 17 is steered to the left when contacting the lower bumper 73 will be described with reference to the next figure.

As shown in FIG. 7A, the operation when the front wheel 17 contacts the bumper surface 74 while being steered to the left at the turning angle α will be described.
As shown in FIG. 7B, a load is further applied to the front wheel 17, and the front wheel 17 moves rearward while turning along the bumper surface 74 while turning in the right direction in FIG.

  The maximum angle of α is assumed to be α = 10 °. If the angle is up to this angle, even if the front wheel 17 comes into contact with the lower bumper 73 in the left-turned state, the bumper surface 74 gradually corrects the right-hand turn. However, it can move smoothly backward. In this case, if α = 10 °, the angle can cover most cases.

  That is, even if the steering direction of the front wheel 17 is steered in the same direction as the bumper surface 74, if the steered angle is within a range up to a predetermined angle, the bumper surface With 74, the same effect as that when turning left can be obtained.

  Note that the right end portion 141 of the bumper surface 74 is longer than the outermost portion 143 in the width direction of the rim portion 142 constituting the front wheel 17 by a length δ. When the front wheel 17 is steered, the end of the bumper surface 74 is provided outside the end of the rim portion 142, so that the rim portion 142 is caught on the bumper surface 74 and the smooth movement of the front wheel 17 is hindered. There is no.

As shown in FIG. 8A, a state immediately after the front wheel 17 comes into contact with the object 145 is shown, and the front wheel 17 is not displaced.
In the present embodiment, since the front end portion 71a of the front bumper is disposed behind the front end portion 17a of the front wheel, the front end portion 71a of the front bumper is It is separated from the object 145.

  As shown in FIG. 8B, a large load is applied to the front wheel 17, and the front wheel 17 is displaced rearward. At this time, since the deformation amount of the front wheel 17 is small, the front end portion 71 a of the front bumper does not hit the object 145.

  As shown in FIG. 9, a large load is applied to the front wheel 17, the displacement of the front wheel 17 advances, the front wheel 17 hits the bumper surface 74 through the tire rear cover 72, and the front wheel 17 is moved backward while being guided by the bumper surface 74. The displaced state is shown in FIG. At this time, the deformation amount of the front wheel 17 increases, and not only the tire rear cover 72 that is displaced together with the front wheel 17 but also the front end portion 71 a of the front bumper hits the object 145.

When the front end 71a of the front bumper hits the object 145, the center of gravity G of the vehicle is arranged at a position lower than the front end 71a of the front bumper in the height direction.
For this reason, when the vehicle receives a load from the front, the vehicle tries to rotate counterclockwise in the figure about the portion 200 between the contact point 146 of the front wheel 17 with the object 145 and the grounding point. Pitching behavior is likely to occur.

  In this regard, in the present invention, the front end portion 71a of the front bumper is disposed above the center of gravity G. In such a position, even when a large load is applied to the vehicle from the front, a part of the load can be received by the front end portion 71a of the front bumper, so that the pitching behavior of the vehicle can be reduced. When it is more appropriate to reduce pitching in a motorcycle equipped with an airbag, it is effective to adopt the structure of the present invention.

Next, the operation of the tire rear cover will be described.
Returning to FIG. 3, a tire rear cover 72 attached to the fork member 15 so as to cover the rear of the front wheel 17 at the front of the vehicle, and a bumper inclined behind the tire rear cover 72 with respect to the vehicle cross axis W A lower bumper 73 having a surface 74 is provided.

  As described above, when a rearward force of the vehicle is applied to the front wheel 17 and the front wheel 17 moves backward, and the tire rear cover 72 retracted together with the front wheel 17 contacts the bumper surface 74 of the lower bumper, the bumper surface 74 of the lower bumper Since it is inclined with respect to the axis W, the front wheel 17 and the tire rear cover 72 move along the inclined bumper surface 74.

  In this case, if both the first and second arm portions 95 and 96 of the tire rear cover extending to the left and right of the fork member 15 in the vehicle width direction have high rigidity, Since the arm part and the second arm parts 95 and 96 are respectively connected to one and the other of the fork members 15 including the left fork 151 and the right fork 152, the rigidity of the fork member 15 is increased. If the rigidity of the fork member 16 is increased, the riding comfort changes, so that the rigidity (strength) of the fork member 15 may need to be reviewed.

  In this regard, in the present invention, the tire rear cover 72 includes a first arm portion 95 and a second arm portion 96 that is less rigid than the first arm portion 95. Further, the second arm portion 96 is attached to the fork member 15 via an elastic member 115. That is, the tire rear cover 72 is substantially cantilevered by the first arm portion 95 on one of the fork members 15.

  When the tire rear cover 72 comes into contact with the bumper surface 74, the second arm portion 96 on the low rigidity side is mainly deformed. With such a tire rear cover 72, even if the tire rear cover 72 is configured to be passed to both ends of the fork member 15, the influence on the rigidity change of the fork member 15 can be reduced.

  If the influence on the rigidity change of the fork member 15 can be reduced by the presence or absence of the tire rear cover 72, the specification of the fork member 15 is not changed with respect to the change in the specification of the vehicle, and the product type in production can be flexibly changed. It can be made to correspond.

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

  The present invention is suitable for motorcycles.

  DESCRIPTION OF SYMBOLS 10 ... Riding type vehicle (motorcycle), 11 ... Body frame, 12 ... Head pipe, 15 ... Fork member, 17 ... Front wheel, 19 ... Front wheel tire, 22 ... Power unit (engine), 72 ... Tire rear cover, 73 ... lower bumper, 74 ... bumper surface, 95 ... first arm part, 96 ... second arm part, 101 ... main body part, 103 ... front and rear extension part, 104 ... bent part, 105 ... upper pipe member, 106 ... lower pipe form 115, elastic member, L, longitudinal axis of vehicle, W, cross axis of vehicle.

Claims (4)

A vehicle body frame (11) having a head pipe (12) at the front of the vehicle, a power unit (22) fastened to the vehicle body frame (11), and a fork member (steeringly connected to the head pipe (12)) 15), a front wheel (17) supported on the lower portion of the fork member (15), and a bumper disposed behind the front wheel (17) and inclined with respect to a vehicle cross axis perpendicular to the vehicle longitudinal axis A lower bumper (73) having a surface (74), and the lower bumper (73) attached to the fork member (15) so as to cover the rear of the front wheel (17) when the front wheel (17) moves backward in the rear of the vehicle. In the front structure of the saddle-ride type vehicle provided with a tire rear cover (72) in contact with
The tire rear cover (72) includes a plate-like main body (101) curved along the tire (19) of the front wheel (17), and the fork member from one side in the vehicle width direction of the main body (101). A first arm portion (95) extending to (15), and a second arm having a smaller rigidity than the first arm portion (95) and extending from the other side in the vehicle width direction of the main body portion (101) to the fork member (15). Part (96),
The front structure of the saddle-ride type vehicle, wherein the second arm portion (96) is attached to the fork member (15) via an elastic member (115). One end of the bumper surface (74) that is inclined with respect to the cross axis is disposed rearward of the vehicle with respect to the other end, and the first arm portion (95) is disposed on one end side of the bumper surface (74). The second arm portion (96) is disposed on the other end side of the bumper surface (74),
The first arm portion (95) is a front-rear extension portion (103) extending in the longitudinal direction of the vehicle, and is bent from the rear end of the front-rear extension portion (103) toward the vehicle width direction to the main body portion (101). The front structure of a saddle-ride type vehicle according to claim 1, further comprising a bent portion (104) to be joined.   The first arm part (95) is welded to the main body part (101) and extends from the main body part (101) to the fork member (15), and the upper pipe member (105). And a lower pipe-like member (106) which is welded to the main body (101) and extends from the main body (101) to the fork member (15). Item 3. A front structure of a saddle-ride type vehicle according to Item 2.   The front part structure of a saddle-ride type vehicle according to any one of claims 1 to 4, wherein the second arm part (96) is a single plate-like member.

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