JP2002211470A - Support structure for front wheel side connection member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the number of components and to improve appearance by supporting a brake hose without using a clamp. SOLUTION: A bottom bridge 3 is longitudinally divided into a body part 65 and a cover part 66, and a guide space 74 is formed in a jointing part to loosely support the brake hose 40. The brake hose 40 can be supported by fixing the cover part 66 to the body part 65 with a bolt 67 from the front side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for advantageously supporting a front wheel-side connecting member of a brake operation transmitting member such as a brake hose in a front brake of a motorcycle. The brake operation transmitting member in the present invention means a member provided between an operation section such as a brake lever and a front brake to transmit a brake operation force such as a hydraulic pressure to the front brake. The front wheel side connection member means a member such as a brake operation transmission member that is guided from the upper portion to the lower front wheel along the front fork.

[0002]

2. Description of the Related Art A front fork supporting a front wheel is rotatably connected to a front portion of a vehicle body frame by a fork bracket, and a brake provided between a brake lever side of a steering wheel and a front brake provided at a lower portion of the front fork. It is known to dispose an operation transmission member vertically along a front fork, and to support an intermediate portion of the brake operation transmission member to a fork bracket with a separate clamp. When the front brake is hydraulic, the brake operation transmission member is a brake hose,
In the case of a drum type, it is a brake cable.

[0003]

According to the above-mentioned conventional structure, a separate clamp is required to support the brake operation transmitting member on the fork bracket. Since the clamp must be provided in an easy place, an extremely sophisticated design process is required to keep the appearance good. Therefore, an object of the present invention is to provide a brake operation transmitting member support structure that can reduce the number of parts and easily improve the appearance.

[0004]

In order to solve the above problems, a support structure for a front wheel-side connecting member according to the present invention includes a front fork supporting a front wheel rotatably supported by a front portion of a vehicle body frame and a front fork. A fork bracket for attaching the front fork to a front portion of a vehicle body frame is divided into a main body portion and a cover portion. The part is detachably attached to the main body, and the front wheel-side connecting member is supported by a mating part of the cover and the main body.

At this time, the cover portion is formed so as to cut out a part of the main body portion. The cover portion is fitted into the cutout recess of the main body portion at the time of mounting, and the surface is flush with and integrated. You can also.

Further, the front wheel side connecting member may be a brake operation transmitting member comprising a brake hose or a brake cable, and the front wheel side connecting member is loosened so as to be vertically movable between a cover portion and a main body portion. It can also be supported or fixed.

[0007]

According to the present invention, when the part of the fork bracket is divided from the main body as a cover, and the cover is integrated with the main body, the front wheel side connecting member is supported by the joint of the two members. With this configuration, the front wheel-side connecting member can be supported on the fork bracket only by disposing the front wheel-side connecting member between the cover and the main body and attaching the cover to the main body. Therefore, it is possible to omit the separate clamp which was required in the past and to reduce the number of parts. In addition, since the cover part is integrated with the main body and becomes the fork bracket itself, it is easy to maintain a good appearance. Become.

Further, if the cover is formed by cutting out a part of the main body, and the cover is fitted into the cutout recess of the main body to be integrally attached, the external appearance can be made flush. The cover can be integrated in appearance so that the main body cannot be specially formed, and the appearance can be further improved.

Further, when the front wheel side connection member is a brake operation transmitting member, a brake hose can be used when the front brake is a hydraulic type, and a brake cable can be used when the front brake is a drum type. Even so, the brake operation transmitting member can be easily and conveniently supported. In addition, if the front wheel-side connecting member such as the brake operation transmitting member is loosely supported between the cover and the main body, the brake operation transmitting member can easily move up and down according to the expansion and contraction of the front fork. In addition, the movement of the front wheel side connection member due to the vertical movement of the front wheel can be restricted by being immovably fixed between the cover and the main body.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, the overall structure of a motorcycle to which the present invention is applied will be outlined. FIG. 1 is a left side view of the motorcycle, and FIG. 2 is a right side view thereof. As is apparent from these figures, the front fork 2 supporting the front wheel 1 is supported at its upper part on the front part 6 of the body frame 5 via the bottom bridge 3 and the top bridge 4 and is rotatable by the handle 7. I am. A headlight 8 is attached to a front portion of the vehicle body frame 5, and front blinkers 9 are attached to both left and right sides thereof.

The body frame 5 includes a front portion 6 formed by forging, a single main frame 10 extending substantially horizontally rearward along the center of the vehicle body, and a main frame 10 extending obliquely downward and rearward from the front portion 6. A down frame 11, a pair of left and right seat rails 12 extending substantially horizontally rearward from the rear of the main frame 10, and a pair of left and right center frames 13 extending diagonally downward and rearward from the rear of the main frame 10; By connecting the lower end of the center frame 13 and the rear end of the seat rail 12 diagonally,
And a pair of left and right rear frames 14 forming a substantially V-shaped space in side view between them. Each of these frame members is a pipe made of an appropriate metal such as iron or aluminum alloy, and is a round pipe on the present embodiment side.

The lower part of the down frame 11 is empty (or oil).
It is connected to a front part of a crankcase 16 in a cold in-line four-cylinder four-cycle engine 15. The upper rear portion of the crankcase 16 is connected to the center frame 13 by an engine hanger 19 that extends obliquely downward and forward from an intermediate portion of the center frame 13, so that the body frame 5 allows the engine 15 to be a part of components. It is a diamond frame.

The lower ends of the center frame 13 and the rear frame 14 are connected to each other by a boss-shaped pivot portion 20, and the left and right pivot portions 20 are pivoted rearward by a pivot shaft (not shown). The front end of the arm 21 is rotatably supported, and a lower rear portion of the crankcase 16 is supported by a hanger / bracket 22 described later supported on a pivot shaft.

At the rear end of the rear swing arm 21, a rear wheel 23 is rotatably supported.
4 is driven by a chain 26 wound between a drive sprocket (not shown) housed inside a sprocket cover 25 provided at the rear of the crankcase 16. A rear cushion unit 27 is provided between the rear portion of the rear swing arm 21 and the rear portion of the seat rail 12, and constitutes a rear wheel suspension.

The fuel tank 2 is mounted on the main frame 10.
8 supported and seated rearward and adjacent thereto
9 is supported on the seat rail 12. Rear end 29a
Constitutes a backrest portion 29 integrally projecting obliquely upward. Although the sheet 29 is a single sheet in this embodiment, it can be arbitrarily replaced with a double sheet.

A tail cowl 30 having a substantially triangular shape in side view is provided in contact with the back surface of the backrest 29a. The tail cowl 30 is a member made of an appropriate material such as resin.
The front slope 31 side in contact with the backrest 29a is the widest portion in the vertical direction, and extends from here toward the rear in a tapered shape, and the rear end 32 has an acute angle.

A tail unit 33 is mounted near the rear end 32. The tail unit 33 has a license plate 35 attached to each rear end of a pair of left and right sheet metal frames 34, and further has left and right rear blinkers 36 attached to the side surfaces of the sheet metal frame 34, and is integrated with a license lamp and the like not shown in the figure. is there.

Reference numeral 40 in the drawing denotes a brake hose,
A pair of left and right wheels is connected between a master cylinder (not shown) of the handle lever and a brake caliper 41 of a dual brake provided as a pair on the left and right sides of the front wheel 1. The brake caliper 41 is a caliper bracket 42
And is slidably in contact with a pair of left and right brake discs 43.

Reference numeral 44 denotes an oil cooler, and reference numeral 45 denotes an air cleaner. The air cleaner 45 includes an electronic injection unit 46.
The air-fuel mixture is supplied to the cylinder head 17 from the electronic injection unit 46 by connecting to the intake port of the cylinder head 17 of the engine 15 via the. Reference numeral 47 denotes a cover of the air cleaner case, which is disposed in a substantially triangular space surrounded by the seat rail 12, the center frame 13, and the rear frame 14. As shown in FIG. 2, a battery 48 and a fuse box 49 are accommodated in the substantially triangular space on the right side of the vehicle body.

The exhaust gas is guided from the exhaust port of the cylinder head 17 to a muffler 51 at the rear of the vehicle body via an exhaust pipe 50.
The exhaust pipes 50 are separated into two at the left and right sides of the vehicle body and assembled, and further connected to a pair of mufflers 51 disposed at the left and right sides of the vehicle body.

Reference numerals 52 and 53 denote pipe-shaped stays for supporting the muffler 51. Of these, upper stays 52 are provided.
Extends rearward from an intermediate portion of the rear frame 14, and the lower stay 53 extends rearward from the rear end of the hanger / bracket 22 and has a substantially triangular shape in side view.

The hanger / bracket 22 provided on the left side of the vehicle body shown in FIG.
Side stands 55 are rotatably supported at the center side, and a step 56 is mounted behind the side stand 55. 2, the lower part of the front of the hanger bracket 22 projects forward to form an engine hanger 57, which supports the lower part of the crankcase 16.

The hanger and bracket 22 on the right side of the vehicle body shown in FIG. 2 has the same structure as that on the left side of the vehicle body.
8 are provided.

Next, the support of the brake hose 40 will be described. 3 is a front view of a main part of the vehicle body, FIG. 4 is a perspective view thereof, and FIG. 5 is a sectional view taken along line 5-5 in FIG. As shown in FIGS. 3 and 4, right and left grips 60R and 60L are provided at both left and right ends of the handle 7. The right grip 60R is provided with a right lever 61R as a brake lever. When the right lever 61R is gripped, a hydraulic pressure is generated in the master cylinder 62, and the hydraulic pressure is used as a brake operating force from the brake hose 40 to the brake caliper 41 of the front brake. To the front brake to operate the front brake.

The brake hoses 40 are provided as a pair corresponding to the left and right brake calipers 41, are respectively separated to the left and right in the vicinity of the headlight 8, and are arranged in the vertical direction along the left and right front forks 2. The middle is supported by a bottom bridge 3 which is one of the fork brackets. The left grip 60L is provided with a left lever 61L as a clutch lever, from which a clutch cable extends to the engine 15 side.

The front fork 2 is of an inverted type and comprises an upper outer tube 63a and a lower inner tube 63b.
4 is supported. The left and right front forks 2
Is supported by a top bridge 4 which is also one of the fork brackets.

As is apparent from FIG. 5, the bottom bridge 3 includes a main body 65 and a cover 66. The cover 66 is fastened and integrated to the front of the main body 65 by bolts 67. The cover portion 66 is formed in a state in which a middle portion between the left and right boss portions 64 is cut out on the front surface of the main body portion 65, and the cover portion 66 fits into a cutout recess 68 formed at this time, and The cover 66 and the periphery of the notch-shaped recess 68 of the main body 65 are flush with each other.

The boss portion 64 is formed integrally with the left and right ends of the main body portion 65, and the outer tube 63 is passed through a fork support hole 64a penetrating vertically.
a (simplified notation) is tightened by bolts 70 across the slit 69 reaching the fork support hole 64a.

The bolt 70 is diagonally fastened from the laterally outward side and the vehicle body front side toward the vehicle body center and the vehicle body rear side, and has a hole 71 formed with a nut portion to which the bolt 70 is fastened.
Is formed through the slit 69 and the side wall 72 of the notch-shaped concave portion 68.

A notch 73 is formed at the left and right sides of the cover 66 corresponding to the left and right corners of the notch-shaped recess 68, and penetrates the bottom bridge 3 vertically with the front surface of the main body 65. Guide space 74 is formed,
The brake hose 40 is passed through the guide space 74.

The guide space 74 is formed in such a size as to allow the brake hose 40 to move up and down, and can loosely support an intermediate portion of the brake hose 40.

Reference numeral 75 denotes a concave portion formed on the front surface of the cover portion 66, which can receive the head of the bolt 67 flush with the head portion, and communicates with a through hole 76 which penetrates the cover portion 66 back and forth. The through hole 76 is formed in the front-rear direction to the main body 65 so as to open to the notch-shaped concave portion 68, and matches the hole 77 forming the nut portion to enable the bolt 67 to be fastened. Reference numeral 78 denotes a simplified stem pipe, which forms a center of rotation of the bottom bridge 3.

Next, the operation of this embodiment will be described. Figures 3-5
As shown in (1), the brake hose 40 can be supported inside the bottom bridge 3 by passing the brake hose 40 into the concave portion 75 between the cover portion 66 and the main body portion 65. In addition, the cover 66 is a strength member constituting the bottom bridge 3 by being fitted into the notch-shaped recess 68 of the main body 65 and being integrated by the bolt 67, so the cover 66 is the bottom bridge 3 itself, and is conventionally required. There was no need for a separate clamp.

In addition, since the outer side is flush with the periphery of the notch-shaped concave portion 68 of the main body 65, the bottom bridge 3 has no external discomfort, so that a good external appearance can be easily maintained and the components can be easily maintained. Points can be reduced.

As is apparent from FIG. 5, since the holes 71 penetrate through the slits 69 and the notch-shaped recesses 68, the chips in the machining at the time of drilling the holes 71 and cutting the threads are cut off. These can be easily machined because they can be discharged to the side.

Further, by passing the brake hose 40 through the inside of the bottom bridge 3, the brake hose 40 can be made to overlap the inside of the front fork 2 in a side view, and the brake hose 40 can be moved forward of the front fork 2. The appearance is good because it is not necessary to protrude too much.

The brake hose 40 below the bottom bridge 3 extends downward along the inside of the front fork 2 and then curves downward at a position above the lower end of the outer tube 63a before being connected to the brake caliper 41.
Therefore, even when the front fork 2 expands and contracts due to the front wheel 1 moving up and down during traveling, the bending of the brake hose 40 can be changed and can be freely supported because it is loosely supported in the recess 75. It can also respond by moving.

Next, another embodiment (second embodiment) will be described with reference to FIG. Note that the same reference numerals are used for the same parts as in the previous embodiment (first embodiment), and the description of the overlapping parts is omitted. FIG.
Is a schematic cross-section of the bottom bridge 3 cut by a cutting section in the front direction, in which a portion through which the brake hose 40 passes is formed by oblique guide surfaces 80 and 81 in a joining portion of the cover portion 66 and the main body portion 65. It is.

Each of the guide surfaces 80 and 81 is formed obliquely downward toward the rear, and forms an oblique guide space 82 between the two guide surfaces 80 and 81. Therefore, if the intermediate portion of the brake hose 40 is inserted into the guide space 82 and the cover portion 66 is fastened and integrated with the main body portion 65 with the bolt 67, the brake hose 40 is bent so as to extend obliquely rearward below the bottom bridge 3. Guide surface 8 of the brake hose 40
The bending of the brake hose 40 can be freely changed depending on the directions of 0 and 81 and the oblique angle, so that adjustment such as being far away from the fitting portion between the outer tube 63a and the inner tube 63b becomes free.

FIG. 7 shows still another embodiment (third embodiment). In this example, the bottom bridge 3 is divided into front and rear portions along the entire length in the left direction to form a main body 65 and a cover 66. Therefore, the main body 65 and the cover 66 are provided with bosses 64b and 64c, each of which is formed with a semicircular concave portion to form one round fork support hole 64a.

Further, flanges 90 and 92 are formed opposite to each left end of the main body 65 and the cover 66, respectively.
Holes 91 and 93 corresponding to the respective holes are formed. The hole 91 is a through hole, and the hole 93 is a nut. The flanges 90 and 92 face each other through a slit 94 and are fastened with bolts 95 from the front side. The middle part in the horizontal direction is the first
The outer tube 63a is fastened in the fork support hole 64a by the bolt 67 in the same manner as in the embodiment.

Further, the fork support hole 64a and the bolt 6
The recesses 96 and 97 each having an appropriate shape such as a semicircle are formed on the opposing surfaces of the main body 65 and the cover 66 at an intermediate portion of 7, and the guide space 98 is formed by facing the recesses 96 and 97. This guide space 9 is formed
A brake hose 40 is passed through the inside of the tube 8 and supported. In this case, the cover 66 is attached to the main body 65.
At the same time, it can function as a member for directly tightening and fixing the outer tube 63a.

The present invention is not limited to the above embodiments, but can be variously modified and applied. For example, the brake hose 40 is not loosely supported between the cover 66 and the main body 65 but is immovable. Can be fixed, in this case,
The movement of the brake hose 40 can be restricted.
The front fork 2 may be of an upright type.

In addition to the brake hose, the present invention can be applied to a cable or a wiring extending from the vicinity of the top bridge 4 to the front wheel 1. As such, there are meter-related members such as speedometer cables and wiring.

[Brief description of the drawings]

FIG. 1 is an overall left side view of a motorcycle to which the present invention is applied.

FIG. 2 is a right side view of the same.

FIG. 3 is a diagram showing the front of a main part of the vehicle body according to the first embodiment.

FIG. 4 is a perspective view of the upper part.

FIG. 5 is a sectional view taken along line 5-5 in FIG. 3;

FIG. 6 is a schematic cross section of a main part of a bottom bridge according to a second embodiment.

FIG. 7 is a sectional view of a bottom bridge according to a third embodiment.

[Explanation of symbols]

1: front wheel, 2: front fork, 3: bottom bridge, 4: top bridge, 7: steering wheel, 8: headlight, 40: brake hose, 41: brake caliper, 61R: right lever, 62: master cylinder, 6
5: body part, 66: cover part, 68: notch-shaped concave part,
74: guide space, 83: guide space, 98: guide space

Claims (4)

[Claims] 1. A motorcycle in which a front fork supporting a front wheel is rotatably supported on a front portion of a vehicle body frame, and a front wheel-side connecting member guided from an upper portion to a lower front wheel along the front fork is provided. A fork bracket for attaching the front fork to the front of the vehicle body frame is divided into a main body and a cover, and the cover is detachably attached to the main body; A support structure for a front wheel-side connection member, which supports the side connection member. 2. The cover part is formed so as to cut out a part of the main body part, and is fitted to a cutout concave part of the main body part at the time of mounting so that the surface is flush and integrated. The support structure for a front wheel-side connection member according to claim 1, wherein: 3. The support structure for a front wheel side connection member according to claim 1, wherein the front wheel side connection member is a brake operation transmission member including a brake hose or a brake cable. 4. The front wheel-side connecting member according to claim 1, wherein the front wheel-side connecting member is loosely supported or immovably fixed between the cover and the main body so as to be vertically movable. Support structure.