JP4644046B2 - Brake support bracket structure for motorcycles - Google Patents

Description

  The present invention relates to an improvement in a support bracket structure that supports a front wheel brake of a motorcycle.

Various types of support bracket structures for supporting a front wheel brake of a motorcycle have been proposed (see, for example, Patent Document 1).
Japanese Utility Model Publication No. 62-18149 (FIG. 1)

  In FIG. 1 of Patent Document 1, reference numeral 4 denotes a front fork, reference numeral 3 denotes a support shaft, reference numeral 13 denotes a caliper bracket, and reference numeral 12 denotes a caliper. That is, the lower part of the caliper bracket 13 is inserted into the back of the front fork 4 (the back of the drawing), the support shaft 3 is passed through the front fork 4 and the caliper bracket 13 in this order, and the support shaft 3 supports the caliper bracket 13 together with the front wheels. That's it. By adopting this support structure, the support member of the caliper bracket 13 can be saved.

  On the other hand, since the lower part of the caliper bracket 13 is inserted, it is necessary to widen the left and right front forks, resulting in an increase in the size of the front fork.

  An object of the present invention is to provide a support bracket structure capable of narrowing the distance between the left and right front forks.

The invention according to claim 1 is a motorcycle including a front wheel rotatably supported on a lower end of a front fork via an axle, a brake member that brakes the front wheel, and a brake support bracket that supports the brake member.
The front fork includes a hollow portion at least at the lower end,
The brake support bracket includes an insertion portion to be inserted into the hollow portion at a lower portion,
With the insertion portion inserted into the hollow portion of the front fork, the axle is configured to penetrate the lower end of the front fork and the insertion portion ,
The lower end of the front fork is opened, and the insertion portion can be inserted into the hollow portion from below.

The invention according to claim 2 is a motorcycle including a front wheel rotatably supported on a lower end of a front fork via an axle, a brake member that brakes the front wheel, and a brake support bracket that supports the brake member.
The front fork includes a hollow portion at least at the lower end,
The brake support bracket includes an insertion portion to be inserted into the hollow portion at a lower portion,
With the insertion portion inserted into the hollow portion of the front fork, the axle is configured to penetrate the lower end of the front fork and the insertion portion,
A slit is formed in the lower peripheral wall of the front fork, and the insertion portion can be inserted into the hollow portion through the slit.

The invention according to claim 3 is characterized in that the brake support bracket includes an abutting portion that abuts on an outer peripheral surface of the front fork at an upper portion.

In the invention according to claim 1, a hollow portion is provided at the lower end of the front fork, and the insertion portion at the lower portion of the brake support bracket is inserted into the hollow portion so that the lower end of the front fork and the insertion portion are penetrated by the axle.
Since the lower part of the brake support bracket is housed in the lower end of the front fork, there is no need to increase the distance between the left and right front forks by the brake support bracket. That is, according to the first aspect, the distance between the left and right front forks can be reduced, and the front fork can be reduced in size.

  Also, insert the brake support bracket insertion part into the hollow part provided at the lower end of the front fork, and insert the block when the gap is open.If the hollow part is filled with a rigid body, the front fork can be used even if the axle is tightened There is no worry about crushing the hollow part. Therefore, the rigidity of the lower end of the front fork can be easily increased.

In addition, in the invention according to claim 1 , the lower end of the front fork is opened so that the insertion portion can be inserted into the hollow portion from below. The brake support bracket can be set on the front fork simply by inserting the insertion portion on the brake support bracket side from below, so that the assembly becomes easy and the number of assembly steps can be reduced.

In the invention according to claim 2, a hollow portion is provided at the lower end of the front fork, and the insertion portion at the lower portion of the brake support bracket is inserted into the hollow portion so that the lower end and the insertion portion of the front fork are penetrated by the axle.
Since the lower part of the brake support bracket is housed in the lower end of the front fork, there is no need to increase the distance between the left and right front forks by the brake support bracket. That is, according to the second aspect, the distance between the left and right front forks can be reduced, and the front fork can be reduced in size.
Also, insert the insertion part of the brake support bracket into the hollow part provided at the lower end of the front fork, and insert the block when the gap opens, so that if the hollow part is filled with a rigid body, the front fork There is no worry about the hollow part of the crushing. Therefore, the rigidity of the lower end of the front fork can be easily increased.
In addition, in the invention according to claim 2 , a slit is formed in the lower peripheral wall of the front fork so that the insertion portion can be inserted into the hollow portion through the slit. The brake support bracket can be set on the front fork simply by inserting the insertion portion on the brake support bracket side through the slit, so that the assembly becomes easy and the number of assembly steps can be reduced.

In addition, since a bypass portion protruding downward from the lower end of the front fork is not required in claim 2 , the brake support bracket can be further reduced in size and weight.

According to the third aspect of the present invention , the contact portion formed on the upper portion of the brake support bracket can be applied to the outer peripheral surface of the front fork. When brake torque is applied, this torque can be received by the outer peripheral surface of the front fork, and the brake support bracket can be made thin.

The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. Note that front, rear, left and right are determined based on the driver, L is left, and R is right.
FIG. 1 is an exploded perspective view of a brake support bracket structure according to the present invention, and the pipe member 14L constituting the lower portion of the front fork changes the round cross section to a substantially square cross section by crushing the lower end.

Further, the brake support bracket 50 has a J-shaped member having an abutting portion 51 joined to the outer peripheral surface of the front fork (pipe material 14L) at the upper portion and a bypass portion 50a and an insertion portion 52 to be inserted into the lower portion of the pipe at the lower portion. It is.
Further, the steel block 53 may be fitted according to the plate thickness of the brake support bracket 50. 54, 55 and 56 are holes through which the axle can be passed.
And the block 53 and the insertion part 52 are inserted from the lower end of the pipe material 14L like the arrow.

  FIG. 2 is a cross-sectional view of the brake support bracket structure according to the present invention. The block 53 and the insertion portion 52 are inserted into the hollow portion 57 formed at the lower end of the pipe material 14L constituting the front fork. It shows having penetrated the block 53 and the insertion part 52 with the lower end of 14L. After the position is determined, the block 53 and the insertion portion 52 may be appropriately welded to the pipe material 14L (58 indicates a weld bead). In this case, the block 53 will drop even if the axle 18 is next pulled out. There is nothing. Reference numeral 21 denotes a brake disc.

  FIG. 3 is a side view of the brake support bracket structure according to the present invention. The contact portion 51 is welded to the pipe material 14L constituting the lower portion of the front fork, and the brake caliper 22 is attached to such a brake support bracket 50. It shows that.

FIG. 4 is a view showing another embodiment of the brake support bracket according to the present invention.
The brake support bracket 50 of (a) integrated the block 53 by welding or adhesion in advance.
In the brake support bracket 50 of (b), the block portion 59 is integrally formed by casting, forging, or cutting.
In both (a) and (b), the manufacturing cost increases, but the number of parts is reduced, and there is no fear that the block 53 is lost.

  In summary, referring back to FIG. 2, in the present invention, the front fork (pipe material 14L) has a hollow portion 57 at least at the lower end, and the brake support bracket 50 has an outer peripheral surface of the front fork (pipe material 14L) at the top. A contact portion 51 (see FIG. 1) to be joined to the lower portion, and an insertion portion 52 (see FIG. 1) to be inserted into the hollow portion 57 at the lower portion, and the insertion portion 52 is inserted into the hollow portion 57 of the front fork, The axle 18 is configured to penetrate the lower end of the front fork (pipe material 14L) and the insertion portion 52, the lower end of the front fork (pipe material 14L) is opened, and the insertion portion 52 is opened from the bottom to the hollow portion 57. It is configured so that it can be inserted into.

  Since the lower part of the brake support bracket 50 is housed in the lower end of the front fork (pipe material 14L), there is no need to increase the distance between the left and right front forks by the amount of the brake support bracket 50. That is, according to the present invention, the distance between the left and right front forks can be reduced, and the front fork can be reduced in size.

  In addition, the insertion portion 52 of the brake support bracket 50 is inserted into the hollow portion 57 formed at the lower end of the front fork, and when the gap is opened, the block 53 is inserted. Even if tightened, there is no fear that the hollow portion 57 of the front fork will be crushed. Therefore, the rigidity of the lower end of the front fork can be easily increased.

  Furthermore, the brake support bracket can be set on the front fork simply by inserting the insertion portion on the brake support bracket side from below, so that the assembly becomes easy and the number of assembly steps can be reduced.

Next, another embodiment of the present invention will be described.
FIG. 5 is a diagram showing another embodiment of FIG. 1, and the pipe member 14L constituting the lower portion of the front fork changes the round cross section to a substantially square cross section by crushing the lower end, and a slit 61 on the rear surface (or front surface). Insert.
The brake support bracket 50B is an L-shaped member having an abutment portion 51 joined to the outer peripheral surface of the front fork (pipe material 14L) at the upper portion and an insertion portion 52 inserted into the lower portion of the pipe at the lower portion. The slit 61 is opened corresponding to the shape of the insertion portion 52.

In order to compensate for the thickness of the thin brake support bracket 50, a steel block 53 is prepared.
The block 53 is inserted from below, and the insertion portion 52 is inserted through the slit 61.

  FIG. 6 is a view of another embodiment of FIG. 2, in which a block 53 and an insertion portion 52 are inserted into a hollow portion 57 formed at the lower end of the front fork (pipe material 14L). And that the insertion portion 52 has been penetrated. After the position is determined, if the block 53 is appropriately welded to the front fork (pipe material 14L) (58 indicates a weld bead), the block 53 will not fall off even if the axle 18 is next pulled out.

  FIG. 7 is a diagram showing another embodiment of FIG. 3, and shows that the contact portion 51 is applied to the outer peripheral surface of the front fork (pipe material 14L) and the brake caliper 22 is attached to such a brake support bracket 50B. If the contact portion 51 is applied to the outer peripheral surface of the pipe material 14L, when a brake torque is applied, this torque can be received by the outer peripheral surface of the front fork, and the brake support bracket can be made thin.

A structure in which the abutting portion 51 is extended and fixed to the pipe material 14L with screws, screws, rivets or the like, or a small piece is taken out from the pipe material 14L, and the abutting portion 51 is fixed to the small pieces with screws, screws, rivets or the like May be.
Furthermore, the contact portion 51 may be omitted, and the upper portion of the brake support bracket 50B may be separated from the outer peripheral surface of the pipe material 14L.
Therefore, the brake support brackets 50 and 50B can be changed into various shapes.

  Moreover, in FIG. 3, the detour part 50a which protrudes below from the lower end of a front fork becomes essential, and the brake support bracket 50 becomes a little large. In this regard, since the detour portion is unnecessary in FIG. 7, the brake support bracket 50B can be reduced in size and weight.

FIG. 8 is a view of another embodiment of FIG. 5 and shows an example in which the block 53 is integrally formed by welding, forging, casting, and cutting, and the slit 61 is widened on the brake support bracket 50B. This eliminates the need to worry about the block 53 falling off.
Therefore, the width of the slit 61 and the cut portion can be arbitrarily changed.

  The brake of the present invention may be any of a disc brake, a drum brake, and similar brakes.

  The brake support bracket structure of the present invention is suitable for a small and lightweight motorcycle.

It is a disassembled perspective view of the brake support bracket structure which concerns on this invention. It is sectional drawing of the brake support bracket structure which concerns on this invention. It is a side view of the brake support bracket structure concerning the present invention. It is a figure which shows the other example of a brake support bracket which concerns on this invention. It is another Example figure of FIG. It is another Example figure of FIG. It is another Example figure of FIG. It is another Example figure of FIG.

Explanation of symbols

14L: Pipe material constituting the lower portion of the front fork, 18: Axle, 22: Brake caliper as a brake member, 50, 50B ... Brake support bracket, 51 ... Abutting portion, 52 ... Insertion portion, 57 ... Hollow portion, 61 …slit.

Claims (3)

In a motorcycle including a front wheel rotatably supported on the lower end of a front fork via an axle, a brake member that brakes the front wheel, and a brake support bracket that supports the brake member,
The front fork includes a hollow portion at least at the lower end,
The brake support bracket includes an insertion portion to be inserted into the hollow portion at a lower portion,
With the insertion portion inserted into the hollow portion of the front fork, the axle is configured to penetrate the lower end of the front fork and the insertion portion ,
A brake support bracket structure for a motorcycle, wherein a lower end of the front fork is opened and the insertion portion can be inserted into the hollow portion from below . In a motorcycle including a front wheel rotatably supported on the lower end of a front fork via an axle, a brake member that brakes the front wheel, and a brake support bracket that supports the brake member,
The front fork includes a hollow portion at least at the lower end,
The brake support bracket includes an insertion portion to be inserted into the hollow portion at a lower portion,
With the insertion portion inserted into the hollow portion of the front fork, the axle is configured to penetrate the lower end of the front fork and the insertion portion,
It said front opened fork slit on the bottom wall of the brake support bracket structure for automatic two-wheeled vehicle you characterized by being configured so that the insertion portion through the slit can be inserted into the hollow portion. The brake support bracket structure for a motorcycle according to claim 1 or 2 , wherein the brake support bracket includes an abutting portion that abuts on an outer peripheral surface of the front fork.

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