JP2521000Y2 - Brake caliper mounting structure - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Field of Industrial Application The present invention relates to a brake caliper mounting structure in a motorcycle having a disc brake on a rear wheel.

(2) Conventional Technology Generally, a motorcycle having a rear wheel equipped with a disc brake supports a brake caliper for pinching a brake disc rotating together with the rear wheel to generate a braking force on a vehicle body so as to be vertically swingable. The above-mentioned swing arm is provided on the upper surface of the rear part, and conventionally, as a mounting structure of such a brake caliper, a structure described in Japanese Utility Model Laid-Open No. 63-197794 is known. The mounting structure of the brake caliper is such that the rear wheel shaft is supported at the rear end of the linear swing arm so as to adjust the tension of the chain so that the position of the rear wheel shaft can be adjusted in the front-rear direction, and the holding member movable in the front-rear direction together with the rear wheel shaft. The brake caliper is supported on the so that the torque transmitted from the brake disc to the brake caliper by the brake operation is received by the swing arm by locking the protrusion formed on the holding member to the swing arm. It is configured.

(3) Problems to be Solved by the Invention However, in the above-described conventional brake caliper mounting structure, the brake caliper provided on the upper surface of the rear part of the swing arm moves along with the vertical swing of the swing arm. There is a risk of interfering with a muffler or an air cleaner provided in the vehicle, and there is a problem that the degree of freedom in vehicle body design is limited in order to avoid it.

The present invention has been made in view of the above-mentioned circumstances. By securing a mounting space for a brake caliper mounted on a swing arm of a motorcycle, it is possible to effectively prevent the brake caliper from interfering with a vehicle body frame or a vehicle body mounted object. The purpose is to prevent.

B. Configuration of the Invention (1) Means for Solving the Problems In order to achieve the above-mentioned object, the present invention has a front end pivotally supported by a vehicle body through a pivot and a rear wheel at a rear end. In a mounting structure of a brake caliper that supports a brake caliper that clamps and brakes a brake disc of a rear wheel on a swing arm having a rear wheel shaft that supports, an intermediate portion of the swing arm is formed into a straight line connecting a pivot and a rear wheel shaft. In contrast, the first feature is that the brake caliper is bent downward and the brake caliper is disposed in a space formed above the swing arm.

Further, according to the present invention, the front end is pivotally supported on the vehicle body through the pivot so as to be vertically swingable, and the brake disc of the rear wheel is clamped by the swing arm having the rear wheel shaft supporting the rear wheel at the rear end for braking. In the brake caliper mounting structure for supporting the brake caliper, the pivot and the rear wheel shaft are biased upward with respect to the center line of the vertical thickness of the swing arm, and the brake caliper is provided in a space formed above the swing arm. The second feature is the provision of.

(2) Operation According to the first feature of the present invention described above, since the space is formed above the swing arm by bending the middle part of the swing arm downward, the brake caliper is arranged in this space. By installing the brake caliper, the position of the brake caliper can be lowered. As a result, when the swing arm swings up and down about the pivot, the brake caliper is prevented from interfering with a vehicle body frame, a vehicle body rear mounted object, or the like.

Further, according to the second feature of the present invention, the position of the swing arm is lowered by displacing the pivot and the rear wheel shaft upward with respect to the vertical center line of the swing arm. By disposing the brake caliper in the formed space, the position of the brake caliper can be lowered. As a result, when the swing arm swings up and down about the pivot, the brake caliper is prevented from interfering with a vehicle body frame, a vehicle body rear mounted object, or the like.

(3) Embodiment An embodiment of the present invention will be described below with reference to the drawings.

1 to 4 show a first embodiment of the present invention,
FIG. 1 is an overall side view of a motorcycle to which the brake caliper mounting structure is applied, and FIG. 2 is an enlarged view of a main part of FIG.
FIG. 3 is a sectional view taken along the line III-III in FIG. 2, and FIG. 4 is an exploded perspective view of a main part.

As shown in FIG. 1, a vehicle body B of this motorcycle includes a steel pipe body frame F on which an engine E, a fuel tank T, a muffler M, a seat S and the like are mounted. A front fork 1 is rotatably supported on the front part of the body frame F, and a handle 2 and a front wheel Wf are supported on the upper and lower ends thereof, respectively. A front end of the swing arm 5 is pivotally supported by a rear portion of the vehicle body frame F through a pivot 3 and an intermediate portion of the swing arm 5 connected to the vehicle body frame F through a rear cushion 4 has an endless end. A rear wheel Wr connected to the engine E via a chain 6 is supported by a rear wheel shaft 7. The swing arm 5 is bent downward in a V-shape in a side view at a portion slightly rearward of the front-rear intermediate portion, and is mounted via a holding member 8 so as to be positioned in the V space of the swing arm 5. By pinching the brake disc 10 with 9, the rear wheel Wr
Braking is performed.

As is apparent from FIGS. 2 to 4, a detachable cover 11 is provided on the rear outer wall of the swing arm 5 having a rectangular cross section, and the rear inner wall of the swing arm 5 and the cover are provided.
Elongated holes 5 ₁ and 11 ₁ are formed in the hole 11 along which the rear wheel shaft 7 is inserted so that the rear wheel shaft 7 can be adjusted in position. An L-shaped slide plate 12 having a shaft hole 12 ₁ through which the rear wheel shaft 7 penetrates is supported inside the swing arm 5 so as to be positionally adjustable in the longitudinal direction, and a head 13 ₁ is engaged with this slide plate 12. adjusting bolt 13 locks is fixed by a lock nut 15 screwed into a nut 14 which is welded to the partition wall 5 ₂ of the swing arm 4.
Therefore, by rotating the adjusting bolt 13 and moving the slide plate 12, the position of the rear wheel shaft 7 is adjusted to the long hole 5 ₁ ,
It can be adjusted in the longitudinal direction within the range of 11 _1, wheel shaft 7 after being adjusted position is fixed to the swing arm 5 by a nut 16 screwed on its end.

The holding member 8 that supports the brake caliper 9 is adjacent to the shaft hole 8 ₁ through which the rear wheel shaft 7 penetrates and the swing arm 5 is provided.
The arc-shaped _first engaging with the long hole 5 ₁ formed in the rear inner wall
The projection 8 ₂ and a flat plate-shaped second projection 8 ₃ that engages with the upper surface of the swing arm 5 in front of the rear wheel shaft 7 are provided. A sliding pin 8 ₄ for supporting a brake caliper 9 described later and a sliding hole 8 ₅ are formed in parallel with each other on the upper portion of the holding member 8. On the other hand, the brake caliper 9 including the caliper cylinder 18 that receives the brake hydraulic pressure from the master cylinder (not shown) via the brake hose 17
By engaging the sliding pin 9 ₁ and the sliding hole 9 ₂ with the sliding hole 8 ₅ and the sliding pin 8 ₄ of the holding member 8, they are supported so as to be slightly movable in the left-right direction.

 Next, the operation of the first embodiment of the present invention will be described.

To adjust the tension of the endless chain 6 that drives the rear wheel Wr, first remove the cover 11 of the swing arm 5, loosen the lock nut 15, and rotate the adjustment bolt 13 to rotate the rear wheel shaft 7.
The slide plate 12 is moved to a predetermined position in the longitudinal direction of the swing arm 5 while guiding the slide arm 12 along the long holes 5 ₁ and 11 ₁ .
Then, after the lock nut 15 is tightened again to position the rear wheel shaft 7, the cover 11 is mounted and the end portion of the rear wheel shaft 7 is fixed with the nut 16.

When the rear wheel shaft 7 is positionally adjusted in the front-rear direction as described above, the holding member 8 that engages with the rear wheel shaft 7 through the shaft hole 8 ₁ is guided through the first projecting portion 8 ₂ to the long hole 5 ₁ , and the rear It moves in the front-rear direction together with the wheel axle 7. As a result, the brake caliper 9 supported by the holding member 8 also moves in the front-rear direction together with the rear wheel shaft 7, and the positional relationship between the brake caliper 9 and the brake disc 10 can be kept constant.

When brake hydraulic pressure is supplied to the caliper cylinder 18 of the brake caliper 9 to brake the rear wheels Wr, a load indicated by an arrow a in FIG. 2 acts on the brake caliper 9 to hold the brake caliper 9. A clockwise torque about the rear wheel shaft 7 acts on the wheel 8. However, this torque is received by the swing arm 5 when the second protrusion 8 ₃ of the holding member 8 provided at a position distant from the rear wheel shaft 7 contacts the upper surface of the swing arm 5,
Rotation of the holding member 8 is effectively prevented.

When the swing arm 5 swings up and down around the pivot 3 as the motorcycle travels, the brake caliper 9 mounted on the upper surface of the swing arm 5 approaches the vehicle body frame F and the muffler M. However, by disposing the brake caliper 9 in the upper space of the swing arm 5 formed in a V shape in a side view, the brake caliper is compared to the conventional linear swing arm 5'shown by a chain line in FIG. The position of 9 is lowered, and as a result, the interference between the brake caliper 9 and the vehicle body frame F, the muffler M or the like is prevented. Further, since the brake caliper 9 is located above the swing arm 5, it is prevented that the brake caliper 9 is blocked by the swing arm 5 and the muddy water or the like is directly applied to the brake caliper 9.

FIG. 5 shows a modification of the above-described first embodiment, and the swing arm 5 of this modification is characterized in that its front portion is bent upward to form an S-shape in side view as a whole. are doing. An exhaust pipe P extending from the engine E passes through a lower portion of the engine E, further passes near the right side surface of the bent portion of the swing arm 5 from bottom to top and is connected to the muffler M. By bending the front portion of the swing arm 5 upward, it is possible to avoid the interference between the bulging portion of the exhaust pipe P and the swing arm 5, and as a result, the volume of the chamber of the exhaust pipe P is increased. It is possible to keep the ground clearance high while securing a sufficient level.

FIG. 6 shows a second embodiment of the present invention and is an enlarged side view of the rear part of the motorcycle body.

The swing arm 5 of this embodiment is linearly formed in a side view, but the positions of the pivot 3 and the rear wheel shaft 7 are deviated above the center of the vertical thickness of the swing arm 5. It has features. In this way, by shifting the positions of the pivot 3 and the rear wheel shaft 7 upward, the pivot 3 and the rear wheel shaft 7 are arranged in the center of the vertical thickness of the swing arm 5 as compared with the conventional one (shown by a chain line). hand,
Since the height of the swing arm 5 can be lowered by δ, a sufficient distance between the brake caliper 9 and the vehicle body frame F can be secured. Further, not only can a space for passing the brake hose 17 be secured below the inside of the swing arm 5, but the brake caliper 9 is disposed above the swing arm 5 as in the first embodiment. As a result, it is possible to prevent muddy water from splashing directly on the brake caliper 9.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various small design changes can be made without departing from the present invention described in the claims for utility model registration. It is possible to do.

For example, if the swing arm 5 is not only bent downward in a side view as in the first embodiment, but also bent outward in a plan view and the brake caliper 9 is arranged in the space formed as a result, the brake is broken. The mounting position of the caliper 9 can be further lowered.

It should be noted that the swing arm 5 does not necessarily have to be a bifurcated fork-shaped one, and it is obvious that it can be a cantilever type.

C. Effect of the Invention As described above, according to the present invention, by bending the swing arm downward, or by biasing the pivot and the rear wheel shaft upward with respect to the center line of the vertical thickness of the swing arm. Since a new space for disposing the brake caliper is secured, it is possible to dispose the brake caliper at a position as low as possible by utilizing the space. As a result, the brake calipers supported by the swing arm can be prevented from interfering with the support frame or the vehicle-body-mounted object even if the swing arm swings largely upward, which greatly improves the degree of freedom in vehicle body design. It becomes possible.

Moreover, since the brake caliper is arranged above the swing arm, the shielding effect of this swing arm causes
This prevents muddy water from directly contacting the brake caliper.

[Brief description of drawings]

1 to 4 show a first embodiment of the present invention. FIG. 1 is an overall side view of a motorcycle to which the brake caliper mounting structure is applied, and FIG. 2 is a main part of FIG. FIG. 3 is an enlarged view, FIG. 3 is a sectional view taken along the line III-III of FIG. 2, FIG. 4 is an enlarged perspective view of a main part, and FIG. 5 is a side view of an entire motorcycle showing a modified example of the first embodiment. FIG. 6 shows a second embodiment of the present invention and is an enlarged side view of the rear portion of the motorcycle body. 3 ... Pivot, 5 ... Swing arm, 7 ... Rear wheel axle, 9 ... Brake caliper, 10 ... Brake disc, 23 ... Spoke, B ... Body, CP ... Body center plane,
Wr ... rear wheel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinichi Koseki, 1-4-1, Chuo, Wako-shi, Saitama, Honda R & D Co., Ltd. (56) References JP-A-60-128086 (JP, A) JP-A 1-153393 (JP, A)

Claims (2)

(57) [Scope of utility model registration request] 1. A vehicle body (B) having a front end through a pivot (3).
The brake disc (10) of the rear wheel (Wr) is squeezed by a swing arm (5) that is pivotally supported in the vertical direction and has a rear wheel shaft (7) that supports the rear wheel (Wr) at the rear end. In a brake caliper mounting structure for supporting a brake caliper (9) for braking by means of braking, an intermediate part of the swing arm (5) is provided with a pivot (3).
Of the brake caliper, characterized in that it is bent downward with respect to a straight line connecting the rear wheel axle (7) and the brake caliper (9) is arranged in a space formed above the swing arm (5). Mounting structure. 2. A vehicle body (B) having a front end through a pivot (3).
The brake disc (10) of the rear wheel (Wr) is squeezed by a swing arm (5) that is pivotally supported in the vertical direction and has a rear wheel shaft (7) that supports the rear wheel (Wr) at the rear end. In the mounting structure of the brake caliper supporting the brake caliper (9) for braking by means of braking, the pivot (3) and the rear wheel shaft (7) are biased upward with respect to the center line of the vertical thickness of the swing arm (5). A brake caliper mounting structure, wherein the brake caliper (9) is arranged in a space formed above the swing arm (5).