JPH02185883A - Locking structure for brake hose - Google Patents

Abstract

PURPOSE:To make easy and sure of the anchoring of a brake hose by installing a connecting fitting formed with a brake fluid passage in the point midway in the brake hose, and making it so as to be fixed to a front fork with this connecting fitting, in the above cationed structure of a motorcycle. CONSTITUTION:A connecting fitting 16 dividedly connected to each side of a master cylinder part and a brake caliper 9 is set up in the point midway in a brake hose 13. A brake fluid passage is formed in this connecting fitting 16 and it is made so as to be interconnected to another brake fluid passage in the hose 13. Then, a ring groove being formed by a large diametral part 16b and a small diametral part 16a formed by the connecting fitting 16 are engaged with a small diametral groove 17a and a large diametral groove 17b of an axle support member 5 installed in a front fork 1, and the hose 13 is fixed. With this constitution, the anchoring of the hose can be done easily and securely.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a fixing structure for a brake hose used in a motorcycle or the like.

[Conventional technology]

A brake hose connects a brake caliper attached to the lower part of a front fork of a motorcycle or the like to a mask cylinder, and transmits the operation of a brake operating member to the brake caliper. By the way, the brake hose is a long and flexible member, and may sag significantly downward due to expansion and contraction of the front fork while the vehicle is running.

For this reason, conventionally, as disclosed in, for example, Japanese Utility Model Application Publication No. Sho 63-24090, the brake hose is clamped in the middle by a clamp member attached to the front fork.

[Problem to be solved by the invention]

However, in such a structure, the task of setting the clamping force of the clamp member against the brake hose is extremely complicated. In other words, it is necessary not only to prevent slipping between the clamp member and the brake hose and to prevent the brake hose from sliding downward as the motorcycle or the like moves, but also to prevent the hose made of a resin material from being strongly clamped in the middle. This is because it is necessary to avoid applying too much pressure, crushing the brake hose and blocking the brake fluid passage.

The present invention has been made in view of these circumstances, and provides a brake hose fixing structure that can easily and reliably fix the brake hose.

[Means to solve the problem]

The brake hose fixing structure according to the present invention is such that a connecting fitting that forms a part of the brake fluid passage and has an engaging part on the outer periphery is provided in the middle of the brake hose, and this connecting fitting is fixed to the front fork. It is.

[Effect]

In the present invention, the connecting fitting is fixed to the front fork, and the connecting fitting is prevented from moving relative to the front fork, so that the brake hose is reliably fixed to the front fork.

(Example) Hereinafter, an embodiment of the present invention will be explained in detail with reference to the drawings. Fig. 1 is an exploded perspective view showing a brake hose fixing structure according to the invention, and Fig. 2 shows a part of a front fork. Figure 3 is a front view, Figure 4 is a bottom view, Figure 5 is a sectional view taken along line V-V in Figure 2, and Figure 6 is a VI-VI in Figure 3.
The line sectional view and FIG. 7 are longitudinal sectional views showing a connecting fitting, and in FIGS. 2 and 3, the reference numeral 1 indicates a front fork used in a motorcycle or the like. The front fork l is disposed on both sides of the front wheel 2 so as to face each other, and is inserted into the outer cylinder 3 from below and slidably held by an outer cylinder 3 supported by a front bracket (not shown). It is composed of an inner cylinder 4 and the like.

5 is an axle support member provided at the lower end of the inner cylinder 4;
An axle support portion having an axle hole is provided on the front side to protrude forward, and a brake caliber attachment portion having an attachment hole is provided on the rear side to protrude rearward. Reference numeral 6 denotes an axle that is suspended horizontally on the axle support portion of the axle support member 5, and is fixed to the axle support portion with a screw provided at the tip. The front wheel 2 is rotatably supported on the axle 6 via a bearing. A brake disc 8 is disposed in a space formed between the front wheel 2 and the inner cylinder 4 and is fixed to the front wheel 2, and a brake caliper 9 clamps the brake disc 8 from both sides to perform braking. This brake caliper 9 is a floating caliper.

Reference numeral 11 denotes an inner cylinder guard that covers the front side of the inner cylinder 4 to protect the inner cylinder 4. The inner cylinder guard 11 extends in the length direction of the inner cylinder 4, and as shown in FIG. A pair of left and right arc-shaped guide pieces 12 that face each other and hold brake hoses to be described later are integrally provided at a plurality of locations.

Reference numeral 13 is a brake hose which is a main part of the present invention and is used to transmit the hydraulic pressure generated in the mask cylinder by operating the brake operating member to the brake caliper T9. The brake hose 13 includes a flexible hose body 14, a connection joint (not shown) connected to one end of the hose body 14 and connected to the mask cylinder, and a connection joint (not shown) connected to the other end of the hose body 14 and connected to the brake caliper 9. and a connecting joint 15. The hose body 14 consists of a polytetrafluoroethylene tube 14a forming a brake fluid passage, a metal suspension mesh 14b, and a vinyl tube 14c covering these. Further, a connecting fitting 16 is provided in the middle of the brake hose 13 to connect the portion of the hose body 14 on the mask cylinder side and the portion on the brake caliber 9 side. The connecting fitting 16 has a small diameter portion 16a provided at the center and large diameter portions 16b provided at both ends of the small diameter portion 16a.

16b, connecting portions 16c, 16c that connect these large diameter portions 16b and the hose body 14, and connecting tubes 16d, 16d.
A part of the brake fluid passage is formed.

The small diameter portion 16a and the large diameter portion 16b form an annular groove as an engagement portion on the outer periphery of the connecting fitting 16. The hose main body 14 is connected by caulking the connecting portion 16c with the connecting tube 16d inserted into the tube 14a.

The brake hose 13 is guided from above to the inside of the inner cylinder guard 11 and is disposed so as to move downward between the guide pieces 12. The brake hose 13 that has passed between the guide pieces 12 is guided downward from the lower end of the inner cylinder guard 11, passes inside the axle support member 5 from the front side, and is bent so as to go rearward. The connecting fitting 16 is provided near a portion of the brake hose 13 corresponding to the lower end of the inner cylinder guard 11. Furthermore, an insertion groove 17 is provided on the lower front surface and lower side surface of the axle support member 5, into which the vicinity of the bent portion of the brake hose 3 is inserted. As shown in FIGS. 8 and 9, the insertion groove 17 extends in the length direction of the inner cylinder 4 immediately below the inner cylinder guard 11, and then moves inward as it goes downward. It also extends towards the rear. and,
The upper part of the insertion groove 17 is opened forward, and a small diameter groove 17a with a semicircular cross section is formed into which the small diameter part 16a of the coupling fitting 16 of the brake hose 13 fits, and below the small diameter groove 17a, the small diameter part 16a of the coupling fitting 16 of the brake hose 13 is fitted.
A large-diameter groove 17b is formed in which a part of the large-diameter portion 16b of No. 6 faces, and a deep groove 17C into which the entire connecting portion 16c fits is formed below the large-diameter groove 17b. On the other hand, the lower part of the insertion groove 17 is opened inward, and the brake hose 13 is inserted here.
A lower protective wall 17d is formed to cover the lower side of the lower protective wall 17d.

Reference numeral 18 denotes a fixing plate made of iron that covers the front side of the brake hose 13 guided downward from the inner cylinder guard 11 and fixes the brake hose 13 to the axle support member 5.

This fixing plate 18 is formed into a substantially plate shape with a rearwardly bent lower part, and is attached to the front side of the axle support member 5 with four mounting screws 19 so as to cover the front side of the insertion groove '17. ing. Further, as shown in FIG. 1O, the upper end portion is provided with a small diameter recess 18a having a semicircular cross section into which the small diameter portion 16a of the connecting fitting 16 is fitted. Small diameter recess 18
A large-diameter recess 18b into which the large-diameter portion 16b fits is provided below a, and a portion of the insertion groove 17 below the recess 18b corresponding to the deep groove 17c is formed into a flat plate shape.

21 is a mounting bracket for attaching the lower part of the inner cylinder guard 11 to the axle support member 5; 22 is a mounting bracket for attaching the upper part of the inner cylinder guard 11 to the outer cylinder 3;
This is a guide member that is movably held against the guide member. 23 is a hose band that connects the brake hose 13 and the inner cylinder guard 11.

In the brake hose fixing structure constructed in this way, the brake hose 13 is inserted into the insertion groove 1 of the axle support member 5.
When the fixing plate 18 is placed on the axle support member 5 from the front and the mounting screws 19 are screwed in, the small diameter part 16a of the coupling fitting 16 is connected to the small diameter recess 18a of the fixing plate 18 and the axle shaft. Fit between the small diameter grooves 17a of the support member 5, and fix the large diameter portion 16b of the connecting fitting 16)1
It can be fitted between the large diameter recess 18b of B and the large diameter groove 17b of the axle support member 5.

Therefore, it is possible to prevent the lower large diameter portion 16b of the connecting fitting 16 from moving upward, and it is also possible to prevent the upper large diameter portion 16b from moving downward. As a result, the brake hose 13 can be securely fixed to the axle support member 5, and the brake hose 13 can be prevented from shifting downward. Therefore, the brake fluid passage will not be blocked even if the brake hose 13 is strongly clamped.As a result, there is no need to specially set the clamping force for the hose when fixing the brake hose 13, and the brake hose can be fixed with a simple operation. Can be done.

Further, the axle support member 5. Inner cylinder guard 11. Cover the brake hose 13 with the fixing plate 18, and
can be prevented from being damaged by stones, etc.

Moreover, since the hose body 14 is interposed between the brake caliber 9 and the connecting fitting 16 and can absorb the movement of the floating caliper, no unreasonable force is applied to the connecting joint 15 or the connecting fitting 16. .

11 to 14 are diagrams showing other embodiments, and the third
Components that are the same or equivalent to those shown in the figures are given the same reference numerals, and their explanations will be omitted. In these examples:
This small diameter portion 16 is fitted into the small diameter portion 16a of the connecting fitting 16.
The connecting fitting 16 is fixed to the axle support member 5 using a pair of band-shaped fixing fittings 31 that sandwich the a.

That is, in the second embodiment shown in FIGS. 11 and 12, a pair of fixtures 31 having flat flanges 31b, 31b at both ends of a semicircular arc portion 31a is used, and this fixture 31.31 is Mounting screws 19 facing each other
It is fixed to the flat front surface of the axle support member 5. Also,
In the third embodiment shown in FIG. 13, an arcuate groove 32 is provided on the front surface of the axle support member 5, into which a semicircular arc portion 31a of a fixing member 31 is fitted.

In the fourth embodiment shown in FIG.
The flanges 31b, 31b are bent so as to hold the axle support member 5, and are attached to the side surface of the axle support member 5 with mounting screws 19.

Therefore, in such an embodiment, the fixing fitting 3
1 can prevent the brake hose 13 from moving downward, and the lower edge of the fixture 31 can prevent the brake hose 13 from moving upward.

Furthermore, in the embodiments described above, if rubber is baked on the contact portions of the fixing fittings 31 and the fixing plate 16 with the connecting fittings 16, the connecting fittings 16 can be firmly fixed without any gaps.

In addition, in the said Example, the example which fixed the brake hose 13 to the axle support member 5 was demonstrated, but this invention is not limited to this.

That is, in the inverted type front fork as in the embodiment, it is sufficient to move integrally with the inner cylinder of the fork, and it can be fixed to the inner cylinder guard or other member.

Further, in an upright type front fork, it may be fixed to the outer cylinder of the fork or another member that moves integrally with the outer cylinder. Furthermore, the engaging portion of the connecting fitting may be made to protrude like a flange, and this engaging portion may be directly fixed with a screw or the like.

〔Effect of the invention〕

As explained above, according to the present invention, a connecting fitting that forms a part of the brake fluid passage and has an engaging portion on the outer periphery is provided in the middle of the brake hose, and this connecting fitting is fixed to the front fork. , it is possible to prevent the coupling fitting from moving relative to the front fork.

Therefore, it is possible to securely fix the brake hose to the front fork using the connecting fitting and prevent it from shifting downward due to vibrations while the vehicle is running. Moreover, since the brake fluid passage is not blocked even if the connecting fitting is strongly compressed, the brake hose can be easily attached without the need to specially set the brake hose clamping force as in the conventional case.

[Brief explanation of the drawing]

Fig. 1 is an exploded perspective view showing a brake hose fixing structure according to the present invention, Fig. 2 is a side view showing a part of the front fork, Fig. 3 is a front view, Fig. 4 is a bottom view, and Fig. 5 is a side view showing a part of the front fork. The figure is a cross-sectional view taken along the line V-V in Figure 2, and Figure 6 is the Vl-V line in Figure 3.
7 is a longitudinal sectional view showing the connecting fittings, FIG. 8 is a front view showing the axle support member, FIG. 9 is a side view of the axle support member seen from the inside, and FIG. 10 is the third 11 is a front view of the bearing support member showing the second embodiment, and FIG. 12 is a sectional view taken along the line - shavings in FIG. 11. FIG. 13 is the third embodiment. A diagram corresponding to FIG. 12 showing an example, and FIG. 14 a diagram corresponding to FIG. 12 showing a fourth embodiment. 4...Inner cylinder, 5...Axle support member, 13...
, brake hose, 16...connecting fitting, 16a...
...Small diameter section, 17. ...Insertion groove, 17a...Small diameter groove, 18...Fixing plate, 18a...Small diameter recess, 31...Fixing metal fitting. fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig fig.

Claims (1)

[Claims] A connecting fitting that forms part of the brake fluid passage and has an engaging portion on the outer periphery is provided in the middle of the brake hose connected to the brake caliper at the bottom of the front fork, and this connecting fitting is fixed to the front fork. Brake hose fixed structure.