JP2008024226A - Front fender of motorcycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a front fender of a motorcycle which is easily manufactured while capable of ensuring the strength and enhancing the appearance. <P>SOLUTION: The front fender has a fender body 31 for covering an upper portion of a front wheel 2, and a side extension body 32 extending downwardly from right and left sides of the fender body 31 as an integrated product. The side extension body 32 comprises a fork cover part 34 for covering a front fork 11, a mounted part 35 to be mounted on a fender mounting stay 29 of the front fork 11. A part in a vicinity of an intersection part P1 of right and left edges 31a of the fender body 31 and a front edge 35a of the side extension body 32 has a backwardly recessed shape in side view. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a motorcycle front fender, and more particularly, to a motorcycle front fender having a fork cover portion that covers a front fork.

  FIGS. 13 and 14 show a conventional front fender of a motorcycle. The front fender 300 includes a fender body 301 that covers an upper portion of a front wheel 308, and lateral sides that extend downward from the left and right sides of the fender body 301. The extension body 302 is provided as an integral molded product. The lateral extension 302 has a fork cover portion 304 that covers the front of the front fork 310 and a mounted portion 303 that is formed on the front side of the fork cover portion 304. The axle bracket 313 at the lower end of the front fork 310 is provided with a mounting stay 315 extending upward along the front surface of the front fork 310, and the mounted portion 303 is fastened to the mounting stay 315 by a pair of upper and lower bolts 305. Has been. The front fork 310 is an inverted type in which, for example, an inner cylinder 311 is inserted into the outer cylinder 312 from below, and the lower inner cylinder 311 is covered from the front by a fork cover portion 304.

FIG. 15 shows another example of a conventional front fender for a motorcycle (Patent Document 1). A front fender 400 includes a fender body 401 that covers the upper part of the front wheel 408, and a separate body from the fender body 401. The mounting member 402 is formed with a fork cover portion 404 that covers the front fork 410 from the front. The fender body 401 is attached to the outer peripheral arc portion of the attachment member 402 with a plurality of bolts 49. The front fork 410 is an inverted type in which an inner cylinder 411 is inserted into the outer cylinder 412 from below, similarly to the front fork of FIGS. 13 and 14, and the inner cylinder 411 is covered from the front by a fork cover portion 404. . The axle bracket 413 at the lower end portion of the front fork 410 is provided with a mounting stay 415 extending upward along the front surface of the front fork 410, and the fork cover portion 404 is fastened to the mounting stay 415 with bolts 407.
JP 2004-338428 A

  In the front fender 300 in which the fork cover portion 304 and the attached portion 303 are integrally formed with the fender body 301 as in the conventional example of FIGS. 13 and 14, the number of parts can be reduced and the manufacturing process can be reduced. Can do. However, considering the ease of manufacturing the mold for fender molding and the strength of the connecting portion between the side extension body 302 and the fender body 301, the side extension body 302 is rear side from the front end of the fender body 301 in a side view. It must be formed in a mountain shape having a wide range of skirts reaching the end, and therefore, the wall portion is integrally formed in the range S1 from the vicinity of the front end of the fender body 301 to the vicinity of the lower end of the attached portion 303. ing. If the wall portion is formed in such an extra range S1, a good appearance as a motorcycle cannot be maintained, and design restrictions are increased. In addition, the air resistance during running increases.

  On the other hand, if the fender body 401 and the left and right mounting members 402 (including the fork cover portion 404) are configured as separate members as in the conventional example of FIG. 15, it takes time to assemble the front fender 400. In addition, a plurality of bolts 409 are exposed to the outside, and a good appearance as a motorcycle cannot be maintained. Further, the assembling accuracy between the fender body 401 and the left and right attachment members 402 is also strictly required.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a front fender of a motorcycle that is easy to manufacture and can maintain a good appearance and strength.

  In order to solve the above-mentioned problems, the present invention comprises a fender body that covers at least a part of a front wheel, and a lateral extension that extends downward from the left and right side portions of the fender body as an integrally molded product. The extension body has a fork cover portion that covers at least a part of the front fork, and a mounted portion that is attached to the fender attachment portion of the front fork, and the left and right side edges of the fender body and the side extension body The vicinity of the intersection with the front edge is shaped to be recessed rearward in a side view, and a reinforcing member is fixed to the front wheel side of the side extension.

  According to the above configuration, (1) since the fender body, the left and right attached parts, and the left and right fork cover parts are integrally formed, the number of parts can be reduced, and manufacture and assembly are facilitated.

(2) The shape in the vicinity of the intersection of the left and right side edges of the fender body and the front edge of the lateral extension body is recessed rearward in a side view, so that the appearance as a motorcycle is improved and molded. It is not necessary to form an extra wall part at the time, and the air resistance during traveling can be reduced.

(3) Since the reinforcing member is fixed to the front wheel side of the side extension body, the strength can be improved without impairing the appearance. In particular, the strength (rigidity) of the concave intersection can be improved.

  In the front fender of the motorcycle, the reinforcing member may have a structure that covers at least a part of a cylinder of the front fork together with the fork cover portion.

  According to the above configuration, the area for covering the front fork can be expanded without complicating the shape of the fork cover part formed integrally with the fender body, and the front fork can be efficiently removed from pebbles and sand scattered from the front during traveling. Can be protected.

  In the front fender of the motorcycle, the cylinder body of the front fork is composed of an outer cylinder and an inner cylinder inserted into the outer cylinder from below, and the fork cover portion includes at least a part of the inner cylinder. It can be set as the structure covered.

  According to the above configuration, in the so-called inverted front fork, the inner cylinder that needs to be protected from the outside rather than the outer cylinder can be preferentially protected against pebbles scattered from the front during traveling.

  In the front fender of the motorcycle, the reinforcing member is fixed to the fender body or the lateral extension by at least one place with a bolt, and a place different from the place where the bolt is arranged is a protrusion and a hole. It can be positioned by engagement.

  According to the said structure, while the number of the components for attachment of a reinforcement member can be reduced, a reinforcement member can be easily attached to the predetermined position of a side extension body at the time of attachment of a reinforcement member.

  In the front fender of a motorcycle having the positioning protrusion and the hole, the protrusion is an annular protrusion formed at the periphery of the mounting bolt insertion hole of the reinforcing member, and the hole is an insertion bolt insertion of the mounting portion. It can be a hole.

  According to the above configuration, the positioning annular protrusion can be easily formed by, for example, burring when forming the mounting bolt insertion hole, and without forming a new positioning dedicated hole. It does not take time and effort.

  1 to 12 show one embodiment of a front fender of a motorcycle according to the present invention, and one embodiment of the present invention will be described in detail with reference to these drawings.

[Overview of the entire motorcycle]
FIG. 1 is a left side view of a motorcycle. An engine 4 is mounted on a body frame 1 between a front wheel 2 and a rear wheel 3. A handle bar 6 and a fuel are disposed above the body frame 1 in order from the front side. A tank 7, a seat 8, a rear seat 9, and the like are arranged. The front wheel 2 is supported on the head pipe 10 at the front end of the body frame 1 via a front fork 11 so as to be steerable left and right. The rear wheel 3 is supported by the swing arm bracket portion 1 a of the vehicle body frame 1 via a swing arm 12 so as to be swingable in the vertical direction.

  The front fork 11 includes a pair of left and right extendable cylinders 15 each including an outer cylinder 15a and an inner cylinder 15b. The cylinders 15 are disposed in a backward inclined posture with respect to a vertical plane, Has a built-in buffer spring and an oil damping mechanism. In this embodiment, a so-called inverted front fork is provided as the front fork 30, and the inner cylinder 15b is inserted into the outer cylinder 15a from below. A front fender 30 covering the front wheel 2 is disposed between the left and right cylinders 15 of the front fork 11.

  The upper portions of the left and right outer cylinders 15a are coupled by a pair of upper and lower steering brackets 17 and 18, and a steering shaft (not shown) is fixed to the center of the left and right widths of the steering brackets 17 and 18, and the steering A shaft is rotatably supported by the head pipe 10. The handle bar 6 is attached to the upper steering bracket 17 by a fastener 20. Axle brackets 21 are fixed to the lower end portions of the left and right inner cylinders 15b, respectively, and the front axle 22 is rotatably supported by the axle brackets 21. The axle bracket 21 is integrally formed with a brake caliper support portion 23 that extends rearward and upward. A brake caliper 24 for a front wheel is attached to the brake caliper support portion 23, and a brake pad in the brake caliper 24 The brake disc 25 fixed to the axle 22 is clamped.

“Configuration of front fender”
FIG. 2 is an enlarged left side view of the front wheel 2 and the front fender 30 of FIG. 1. The front fender 30 disposed between the left and right cylinders 15 of the front fork 11 includes at least a part of the front wheel 2. A fender body 31 to be covered and a pair of left and right side extending bodies 32 extending downward from the left and right side portions of the fender body 31 are provided as an integrally molded product made of resin. For example, the fender body 31 and the side extension 32 are formed of ABS resin (a copolymer compound of acrylonitrile, butadiene and styrene) or the like. In this embodiment, the fender body 31 has a shape that covers the front wheel 2 from the outside in the radial direction from the front direction to the rear part slightly from the upper end of the front wheel 2. The fender body 31 having a shape that covers from the rear end position to the rear end position can also be adopted, and the range covering the front wheels 2 can be changed according to the type of the motorcycle. The lateral extension 32 has a fork cover part 34 that covers at least a part of the inner cylinder 15b from the front and the side, and a mounted part 35 that extends forward from the front end of the fork cover part 34. Yes. The axle bracket 21 at the lower end of the front fork 11 is integrally formed with an attachment stay 29 that extends upward in front of the inner cylinder 15b, and the attached portion 35 of the side extension 32 is attached to the attachment stay 29. It is attached by a pair of upper and lower fender mounting bolts 36. Further, the front fender 30 has a metal reinforcing member 33 attached to and detached from the back side (front wheel side) of the left and right side extension bodies 32 in addition to the integrally formed product of the fender body 31 and the side extension bodies 32. It is fixed freely.

(Detailed shapes of the fender body 31 and the side extension body 32)
In FIG. 2, the upper end of the fender body 31 is formed in an arc shape substantially along the outer peripheral end shape of the front wheel 2, and the left and right side edges 31 a of the front portion of the fender body 31 are substantially from the front end of the fender body 31. It extends rearward in a horizontal straight line, and inclines downward from the middle to the intersection P1 with the side extension 32. The left and right side edges 31b of the rear part of the fender main body 31 are curved forward and upward from the rear end of the fender main body 31 and extend frontward and upward, and incline forward and downward from the middle to the side extension 32.

  The left and right side extension bodies 32 extend downward from the left and right side portions of the fender body 31 substantially in parallel with the inner cylinder 15b of the front fork 11 (backward tilting posture).

  The fork cover part 34 is formed in a partial cylindrical shape, and has a large diameter part 34a at the upper end part, a tapered part 34b that is connected to the lower end of the large diameter part 34a and has a smaller diameter toward the lower part, and the tapered part 34b. The small diameter part 34c is connected to the lower end and extends downward along the inner cylinder 15b. The large-diameter portion 34a is formed in a substantially semi-cylindrical shape, covers the front half of the upper end portion of the inner cylinder 15b from the front and sides, and has a size (radius) that can sufficiently accommodate the lower end portion of the outer cylinder 15a. Yes. The tapered portion 34b and the small-diameter portion 34c are formed in a substantially quarter-cylindrical shape, and cover the front half of the inner cylinder 15b opposite to the front wheel side from the front and side.

  The front end portion of the tapered portion 34b is an intersection P1 between the side edge 31a of the fender body 31 and the front edge 35a of the side extension body 32. The vicinity of the intersection P1 has a shape that is recessed backward from the left and right side edges 31a of the front part of the fender body 31 to the front edge 35a of the attached part 35. That is, the vicinity of the intersection P1 of the lateral extension body 32 has a shape constricted rearward, and a space S2 that curves backward in a side view is formed in front of the intersection P1.

  FIG. 5 is an enlarged left side view of an integrally molded product of the fender body 31 and the side extension body 32, and a pair of recesses 40 are formed in the attached portion 35 with a space in the vertical direction. 40 is recessed on the front wheel side, and a bolt insertion hole 41 is formed on the bottom surface of the recess 40.

  FIG. 6 is a front view (a front view of FIG. 5) of an integrally molded product of the fender body 31 and the side extension body 32. In the vicinity of the large-diameter portion 34a and the tapered portion 34b of the fork cover portion 34, A connecting wall 43 connected to the main body 31 is formed, and a reinforcing member mounting hole 44 is formed in the connecting wall 43.

(Reinforcing member shape)
7 is a left side view of the left reinforcing member 33, FIG. 8 is a view taken along arrow VIII in FIG. 7, FIG. 9 is an enlarged longitudinal sectional view of the upper end portion of the reinforcing member 33, and FIGS. FIG. In FIG. 7, a pair of bolt insertion holes 51 are formed in the front half portion 33a of the reinforcing member 33 at an interval in the vertical direction, and at the periphery of the lower bolt insertion hole 51, as shown in FIG. An annular protrusion 52 that protrudes on the side opposite to the wheel side is integrally formed by burning. On the other hand, the rear half part 33b of the reinforcing member 33 is formed in an arc shape in the horizontal section, and the arc-like rear half part 33b is formed in the fork cover part 34 of the lateral extension body 32 as shown in FIGS. Is formed so as to extend from the front side to the front wheel side, and covers the front wheel side portion of the inner cylinder 15b from the front side. That is, the fork cover part 34 of the side extension 32 and the arc-shaped rear half part 33b of the reinforcing member 33 cover substantially the entire surface of the inner cylinder 15b of the front fork 11 from the front.

(Mounting structure of the reinforcing member 33 and the side extension 32)
FIG. 9 is a longitudinal sectional view of the upper end portion of the reinforcing member 33. A nut 61 is fixed to the upper end portion of the reinforcing member 33 by welding, and is inserted into the reinforcing member mounting hole 44 of the connecting wall 43 from the front. The upper end portion of the reinforcing member 33 is fixed to the connecting wall 43 by screwing the bolt 60 to the nut 61. As shown in FIGS. 10 and 11, the front half 33 a of the reinforcing member 33 is fixed to the mounting stay 29 by a pair of upper and lower fender mounting bolts 36 together with the mounted portion 35 of the lateral extension body 32. ing.

  10 and 11, a pair of upper and lower fender mounting holes 64 are formed in the mounting stay 29, and a nut 65 is fixed to the back side (front wheel side) of each fender mounting hole 64 by welding. Yes. By inserting a pair of upper and lower bolts 36 for fender attachment into the bolt insertion hole 41 of the attached portion 35, the bolt insertion hole 51 of the reinforcing member 33, and the fender attachment hole 64 of the attachment stay 20, and screwing to the nut 65. The attached portion 35 and the reinforcing member 33 of the side extension body 32 are fastened to the attachment stay 29 together. The nut 65 can be used without being welded to the mounting stay 29.

(Attaching order of the reinforcing member 33 and the side extension 32)
(1) First, as shown in FIG. 3, the reinforcing member 33 is attached to an integrally molded product of the fender body 31 and the side extension body 32. That is, the upper end portion of the reinforcing member 33 is fixed to the connecting wall 43 of the fender body 31. In this operation, the annular protrusion (burning portion) 52 of the bolt insertion hole 51 on the lower side of the reinforcing member 33 is attached. The reinforcing member 33 is positioned at a predetermined position with respect to the lateral extension body 32 by fitting into the bolt insertion hole 41 on the lower side of the portion 35. In other words, the upper and lower bolt insertion holes 51 of the reinforcing member 33 are positioned so as to be fixed at positions corresponding to the upper and lower bolt insertion holes 41 of the attached hole 35.

(2) After the reinforcing member 33 is temporarily fixed to the side extension body 32, the attached portion 35 of the side extension body 32 is overlapped with the attachment stay 29 of the axle bracket 21, as shown in FIG. The reinforcing member 33 and the side extension 32 are fastened to the mounting stay 29 together with the mounting bolts 36.

(Method of forming an integrally molded product of the fender body 31 and the side extension 32)
In FIG. 6, the integrally molded product of the fender body 31 and the side extension body 32 is an upper mold D1 that molds the upper surface of the fender body 31 and the outer surface of the side extension body 32 (the side opposite to the front wheel side). The lower die D2 for molding the lower surface of the fender body 31 and the inner side surface (front wheel side surface) of the side extension 32, and several slide cores for molding the interior of the fork cover portion 34 and the like (not shown) ). The upper mold D1 and the lower D2 are referred to as upper and lower sides of the attached front fender 30. In actual molding, the upper mold D1 is arranged on the lower side, and the lower mold is used. In some cases, D2 is disposed on the upper side and molded.

  The arrows K1 and K2 in FIG. 5 indicate the direction in which the upper mold D1 and the lower mold D2 are pulled out. The pulling directions K1 and K2 are along the inclination direction of the front edge of the front end portion P1 of the tapered portion 34b of the fork cover portion 34. The direction is set.

  12 is an enlarged cross-sectional view taken along the line XII-XII of FIG. 5 at the time of molding. The front side edge 31a of the fender body 31 surrounding the space S2 recessed rearward and the front edge 35a of the side extension 32 are shown. The upper and lower molds D1 and D2 can be formed to have a shape that does not have a thin portion or the like that lowers the mold strength. That is, it takes less time to manufacture the upper and lower molds D1 and D2, and it is possible to easily form an integrally molded product of the fender body 31 and the side extension body 32.

(Effect in embodiment)
(1) As shown in FIG. 12, the front side edge 31a of the fender body 31 surrounding the space S2 recessed backward and the front edge 35a of the lateral extension body 32 have a predetermined interval L1 in the left-right direction. As a result, the area of the inner cylinder 15b of the front fork 11 covered by the small diameter portion 34c of the fork cover portion 34 is reduced as shown in FIGS. 10 and 11, but the reinforcing member 33 is used as a complementary member of the fork cover portion 34. By using it, most of the inner cylinder 15b can be covered from the front and the side, and the protection function of the inner cylinder can be maintained.

(2) As shown in FIG. 2, by forming the intersecting portion P1 between the fender body 31 and the side extension body 32 so as to be constricted rearward, a space portion S2 recessed backward is formed in front of the intersecting portion P1. Therefore, an extra wall portion (range S1) as shown in FIGS. 13 and 14 can be omitted, the appearance can be improved, and the air resistance during traveling can be reduced. Moreover, since the reinforcing member 33 is fixed to the back surface side (front wheel side) of the lateral extension body 32 in contrast to the formation of the space portion S2 that is recessed rearward, the strength of the front fender 30 is maintained without impairing the appearance. (Rigidity) can be kept high.

(3) As shown in FIG. 4, as a structure for attaching the reinforcing member 33 to the lateral extension body 32, only one portion of the upper end portion of the reinforcing member 33 is fixed to the connecting wall 43 with the bolt 60 dedicated to the reinforcing member, As shown in FIGS. 10 and 11, the two bolt insertion holes 51 of the front half 33 a are attached to the attachment stay 29 of the axle bracket 21 by tightening together with the attached portion 35 of the side extension 32. As a result, the number of fixing members dedicated to the reinforcing member can be reduced.

(4) Further, as shown in FIG. 7, an annular projection 52 is formed by burning on the periphery of one bolt insertion hole 51 out of the two bolt insertion holes 51 of the reinforcing member 33, as shown in FIG. In addition, the reinforcing member 33 is positioned with respect to the side extension body 32 by fitting the annular protrusion 52 into the bolt insertion hole 41 of the side extension body 32. It can be easily attached to the predetermined position and the predetermined posture of 32, and the attaching work of the reinforcing member 33 does not take time.

[Other embodiments]
(1) Although the reinforcing member 33 is made of metal such as iron in the above embodiment, it can be formed of hard resin.

(2) In the above embodiment, the front fork 30 is applied to a motorcycle provided with an inverted front fork into which the inner cylinder 15b is inserted from the lower side of the outer cylinder 15a. It can also be applied to a motorcycle having an upright front fork to be inserted. In this case, the fork cover portion of the front fender protects at least a part of the lower outer cylinder from the front and sides, and the mounting stay 29 is formed directly on the lower outer cylinder. become.

(3) In the above-described embodiment, as shown in FIG. 2, the attached portion 35 of the lateral extension body 32 is integrally formed on the front side of the fork cover portion 34. It is also possible to adopt a structure in which a mounted portion is formed on the side opposite to the front wheel side, and the mounting stay 29 of the axle bracket 21 is formed outside the inner cylinder 15b (the front wheel is on the opposite side).

(4) The present invention is not limited to the various embodiments described above, and includes various modifications within the scope described in the claims. In particular, the shape recessed backward in the vicinity of the intersection P1 between the side edge 31a of the fender body 31 and the side extension 32 is, for example, the front of the attached portion 35 as shown by a virtual line 35'a in FIG. It also includes a structure in which the edge 35 ′ a extends substantially rearward and upward and intersects with the side edge 31 a of the fender body 31. In the embodiment, the front fender 30 is configured to cover a position slightly forward from the upper end portion of the front wheel 2 to the side of the front fork 11 and the oblique rear upper position of the front wheel 2. The structure is not limited to such a structure, and for example, a structure that covers the upper half of the front wheel 2 from above can be used.

1 is a left side view of a motorcycle including a front fender according to an embodiment of the present invention. FIG. 2 is an enlarged left side view of a front fender and a front wheel in FIG. 1. It is a left view of a front fender. It is a front view of a front fender. It is a left side enlarged view of the integral molding with a fender main body and a side extension body. It is a left side enlarged view of the integral molding with a fender main body and a side extension body. FIG. 4 is a left side view of the left reinforcing member in FIG. 3. It is a VIII arrow directional view of the reinforcing member of FIG. It is a longitudinal cross-sectional enlarged view of the upper end part which shows the attachment state of the reinforcement member of FIG. It is XX sectional drawing of FIG. 2 of a side extension body and a reinforcement member. It is a XI-XI sectional view of Drawing 2 of a side extension object and a reinforcing member. FIG. 6 is an enlarged cross-sectional view taken along the line XII-XII in FIG. It is a left view of a prior art example. It is a front view of the left half of the front fender of FIG. It is a left view of another prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Body frame 11 Front fork 15 Cylinder 15a Outer cylinder 15b Inner cylinder 29 Mounting stay 30 Front fender 31 Fender main body 31a Side edge 32 of fender main body Side extension body 33 Reinforcement member 34 Fork cover part 35 Mounted part 35a Side extension Front edge 41 of body (attached part) Bolt insertion hole 43 of attached part 43 Connecting wall 44 Reinforcement member attachment hole 351 Reinforcement member bolt insertion hole 52 Annular protrusion 60 Reinforcement member attachment bolt

Claims (5)

A fender body that covers at least a part of the front wheel, and a lateral extension that extends downward from the left and right side portions of the fender body, are provided as an integrally molded product.
The lateral extension includes a fork cover portion that covers at least a part of a front fork cylinder, and a mounted portion that is attached to a fender mounting portion of the front fork,
The vicinity of the intersection of the left and right side edges of the fender body and the front edge of the lateral extension body is shaped to be recessed backward in a side view,
A front fender of a motorcycle, wherein a reinforcing member is fixed to a front wheel side of the side extension body.   2. The front fender of a motorcycle according to claim 1, wherein the reinforcing member covers at least a part of a cylinder of the front fork together with the fork cover portion.   The said cylinder is comprised from the outer cylinder and the inner cylinder inserted in this outer cylinder from the downward direction, The said fork cover part has covered at least one part of the said inner cylinder. Or the front fender of a motorcycle according to 2.   The reinforcing member is fixed at least one place to the fender body or the lateral extension body with a bolt, and a position different from the place where the bolt is arranged is positioned by engagement between a protrusion and a hole. The front fender of a motorcycle according to any one of claims 1 to 3. The motorcycle according to claim 4, wherein the protrusion is an annular protrusion formed on a peripheral edge of a mounting bolt insertion hole of the reinforcing member, and the hole is a mounting bolt insertion hole of the mounted portion. Front fender.

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