JP3370190B2 - Front fork holder fixing structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a holder fixing structure for a front fork of a motorcycle or the like.

[0002]

2. Description of the Related Art As a front fork of a motorcycle,
The one disclosed in Japanese Examined Patent Publication No. 4-54098 is known. In this front fork, an inner tube is slidably inserted into an outer tube, and an axle bracket and a holder are integrally cast on the outer tube. And
A brake caliper is attached to a brake caliper mounting portion around the axle bracket, and a brake hose for supplying hydraulic pressure to the brake caliper is fixed to the holder.

In recent years, however, there is an outer tube which is manufactured by an Al material drawing pipe or cold forging to realize its light weight (thin wall) and high strength. In this case, the axle bracket and the holder cannot be integrally formed with the outer tube, the axle bracket is screwed onto the outer tube, and the holder is fastened to the outer circumference of the outer tube.

[0004]

In a front fork in which the axle bracket and the holder are separate from the outer tube, the outer tube is attached to the outer tube in order to keep the brake hose routed even when the assembly is completed. It is necessary to attach the holder to the screwed axle bracket at a predetermined circumferential position (the brake hose fixing part of the holder is at the same circumferential position as the brake caliper attachment part of the axle bracket or at a position opposite 180 degrees).

However, since the axle bracket is assembled by being screwed onto the outer tube, the circumferential lock position of the axle bracket with respect to the outer tube is unknown until the screwing completion stage. Therefore, after the screwing of the axle bracket is completed, some positioning process is required to fix the holder at the predetermined circumferential position with respect to the axle bracket.

The present invention relates to a front fork in which the axle bracket and the holder are separate from the outer tube,
For the axle bracket screwed to the outer tube,
The purpose is to make it possible to easily position the holder mounting position.

[0007]

According to a first aspect of the present invention, an inner tube is slidably fitted in an outer tube, an axle bracket is screwed to the outer tube, and an annular shape is formed around the outer tube. In the holder fixing structure of the front fork with the holder attached, the holder has an annular part that is mounted on the outer circumference of the outer tube so that it can rotate, and tightening parts at both ends of the annular part that can be fastened to the outer circumference of the outer tube. In addition, a notch is formed on the axial end surface of the holder, and an annular rib is formed on the outer circumference of the outer tube for processing a caulking portion that engages with the notch of the holder. It is the one.

According to a second aspect of the present invention, an inner tube is slidably fitted in an outer tube, an axle bracket is screwed to the outer tube, and an annular holder is attached to the outer circumference of the outer tube. In the holder fixing structure of the fork, a metal tightening band having an annular portion rotatably mounted on the outer circumference of the outer tube and tightening portions at both ends of the annular portion can be fastened to the outer circumference of the outer tube. , Forming a notch on the axial end surface of the tightening band, and forming an annular rib on the outer circumference of the outer tube for processing the caulking part that engages with the notch of the tightening band. The holder can be non-rotatably attached to the outer circumference of the tightening band fastened to the through the tightening portion. Holder fixing structure of a front fork to.

According to a third aspect of the present invention, in addition to the first or second aspect of the present invention, the holder is a brake hose fixing holder.

[0010]

According to the present invention as set forth in claim 1, the following effects are obtained. After the axle bracket has been screwed onto the outer tube and the mounting position of the axle bracket on the outer tube has been fixed, the annular rib on the outer circumference of the outer tube is fixed so that the axle bracket and the holder are in a predetermined circumferential relative position. Process the crimped part. Then, the holder is fastened to the outer circumference of the outer tube in a state where the notched portion of the holder is engaged with the crimped portion and positioned. As a result, the holder is easily positioned and attached at a predetermined circumferential position with respect to the axle bracket screwed to the outer tube.

Even in the use state, the holder is prevented from rotating due to the engagement between the cutout portion and the caulking portion on the outer tube side and the fastening force of the holder, and the positioning state with respect to the axle bracket is maintained.

The present invention according to claim 2 has the following effects. After screwing the axle bracket onto the outer tube and fixing the attachment position of the axle bracket to the outer tube, make sure that the axle bracket and the holder (tightening band) are in the specified circumferential relative position. The crimping part is processed on the annular rib on the outer circumference. Then, the fastening band is fastened to the outer circumference of the outer tube in a state where the notch portion of the fastening band is engaged with the caulking portion and positioned. Further, the holder is non-rotatably attached to the outer circumference of the tightening band via the tightening portion. As a result, the holder is easily positioned and attached at a predetermined circumferential position with respect to the axle bracket screwed to the outer tube via the tightening band.

Further, since the metal tightening band is used, (a) the strength of the notch can be increased and the engaging force with the caulking part on the outer tube side can be increased, and (b) the outer tube The advantage is that the tightening force of can be increased.

Even in use, the holder is prevented from rotating by the engagement between the notch of the tightening band and the caulking part on the outer tube side through the tightening band and the tightening force of the tightening band. The positioning state with respect to is maintained.

The present invention according to claim 3 has the following effects. In a front fork that separates the axle bracket, the brake hose fixing holder, and the outer tube,
For the axle bracket screwed to the outer tube,
The mounting position of the brake hose fixing holder can be easily positioned.

However, in the present invention, the holder may be another holder such as a holder for fixing a speedometer cable.

[0017]

1 is a schematic view showing a front fork of the first embodiment, FIG. 2 is a schematic view showing an outer tube of the first embodiment, FIG. 3 is a sectional view taken along line III-III of FIG. 4 is a schematic diagram showing a fastening state of the tightening band to the outer tube, FIG. 5 is a schematic diagram showing the outer tube of the second embodiment,
FIG. 6 is a sectional view taken along the line VI-VI of FIG. 5, and FIG. 7 is a schematic view showing a fastening state of the holder to the outer tube.

(First Embodiment) (FIGS. 1 to 4) In a front fork 10 for a motorcycle, as shown in FIG. 1, an inner tube 12 is slidably fitted in an outer tube 11 and these are mounted. The tubes 11 and 12 have therein a spring and a damper that constitute a shock absorber. 1 and 2, 13 is an axle bracket, 14 is a tightening band, 15 is a holder for fixing a brake hose, and 16 is a dust boot. The axle bracket 13 includes a brake caliper mounting portion 13A.

The outer tube 11 is a high-strength Al material drawn pipe, and has an outer diameter cut into a predetermined shape. The outer tube 11 is screwed with the axle bracket 13 on the male screw portion 11A at the lower end thereof, and the tightening band 14 is attached to the band attaching groove portion 11B on the upper end side outer periphery thereof, and the band attaching groove portion 1 is provided on the upper end side outer periphery thereof.
The holder 15 can be attached to the holder attachment groove portion 11C adjacent to 1B.

Here, the tightening band 14 is made of a metal such as a steel plate, and has a C-shaped annular portion 14A rotatably mounted in the band mounting groove portion 11B on the outer circumference of the outer tube 11, It has tongue-shaped tightening portions 14B at both ends of the annular portion 14A. Tightening band 1
As will be described later, 4 is fastened to the outer circumference of the outer tube 11 together with the holder 15 in a state of being wrapped in the holder 15.

The holder 15 is made of resin, and has a C-shaped annular portion 15A rotatably mounted on the outer circumference of the outer tube 11 and the fastening band 14, and a tongue-shaped fastening portion 15B at both ends of the annular portion 15A. Have. Holder 15
As will be described later, the outer tube 1 together with the tightening band 14 is wrapped around the tightening band 14.
It is attached to the outer circumference of 1.

The holder 15 has a dust boot mounting groove portion 15C and a brake hose fixing portion 15D.

However, in the front fork 10, as shown in FIGS. 3 and 4, a concave notch 21 is formed on the axial end surface of the tightening band 14. Further, on the outer circumference of the outer tube 11 (the portion sandwiched by the band mounting groove portion 11B and the holder mounting groove portion 11C), an annular rib 22 for processing a caulking portion 22A that engages with the notch portion 21 of the tightening band 14 is provided. Has been formed.

Further, in the front fork 10,
The holder 15 can be non-rotatably attached to the outer circumference of the tightening band 14 fastened to the outer circumference of the outer tube 11 via the tightening portion 14B. The tightening band 14 and the holder 15 have their tightening portions 14B, 1
A bolt 23 is screwed onto 5B and fastened to the outer circumference of the outer tube 11.

The procedure for assembling the axle bracket 13, the tightening band 14, and the holder 15 to the outer tube 11 will be described below. (1) The axle bracket 13 is screwed onto the external thread 11A of the outer tube 11 (Fig. 2).

(2) The axle bracket 13 and the holder 15 (tightening band 14) are at a predetermined circumferential relative position (the brake hose fixing portion 15D of the holder 15 is the axle bracket 1).
180 degrees opposite to the brake caliper mounting part 13A of 3)
The caulking portion 22A is processed on the rib 22 on the outer circumference of the outer tube 11 so as to form (FIG. 4 (A)).

(3) The tightening band 14 is mounted in the band mounting groove 11B of the outer tube 11 in a state where the notch 21 of the tightening band 14 is engaged and positioned with the caulking part 22A (FIG. 4 (B)). ).

(4) The holder 15 is mounted in the holder mounting groove portion 11C of the outer tube 11 in a state where the holder 15 is non-rotatably mounted on the outer periphery of the tightening band 14 via the tightening portion 14B. The tightening band 14 and the holder 15 are fastened to the outer circumference of the outer tube 11 with bolts 23 (FIG. 3).

The brake hose fixing portion 1 of the holder 15
A brake hose attachment 24 is attached to 5D, and a brake hose 25 for supplying hydraulic pressure to the brake caliper attached to the brake caliper attachment portion 13A of the axle bracket 13 is fixed to this attachment 24.

The lower end of the dust boot 16 is fixed to the dust boot mounting groove 15C of the holder 15 by a boot band 26.

The operation of this embodiment will be described below. After screwing the axle bracket 13 onto the outer tube 11 and fixing the mounting position of the axle bracket 13 to the outer tube 11, the axle bracket 13 and the holder 15 (tightening band 14) are moved to a predetermined circumferential relative position. The crimping portion 22A is processed on the annular rib 22 on the outer periphery of the outer tube 11 so as to be formed. Then, the tightening band 14 is fastened to the outer circumference of the outer tube 11 in a state where the notch 21 of the tightening band 14 is engaged with the caulking portion 22A and positioned. Further, on the outer periphery of the tightening band 14 via the tightening portion 14B,
The holder 15 is non-rotatably attached. As a result, the holder 15 is easily positioned and attached to the axle bracket 13 screwed to the outer tube 11 at a predetermined circumferential position via the tightening band 14.

Further, since the metal tightening band 14 is used, (a) the strength of the notch 21 can be increased and the engaging force with the caulking part 22A on the outer tube 11 side can be increased, (b) ) There is an advantage that the tightening force to the outer tube 11 can be increased.

Even in use, the holder 15 is
Through the tightening band 14, the notch 21 of the tightening band 14 is engaged with the caulking part 22A on the outer tube 11 side, and the tightening force of the tightening band 14 is used to prevent rotation, so that the positioning state with respect to the axle bracket 13 is maintained. It

In the front fork 10 in which the axle bracket 13 and the holder 15 are separate from the outer tube 11, it is possible to easily position the holder 15 with respect to the axle bracket 13 screwed to the outer tube 11. You can

(Second Embodiment) (FIGS. 5 to 7) Also in the front fork of the second embodiment, as in the first embodiment, the inner tube is slidably inserted into the outer tube 31 and the outer tube is inserted. An axle bracket 33 is screwed onto 31 and an annular speedometer cable fixing holder 35 is attached to the outer circumference of the outer tube 31.

The outer tube 31 is a high-strength Al material drawn pipe, and has an outer diameter cut into a predetermined shape. The outer tube 31 is configured such that the axle bracket 33 is screwed into the male thread portion 31A of the lower end portion thereof, and the holder 35 is attached to the holder attachment groove portion 31B on the outer periphery of the upper end side thereof.

The holder 35 is made of resin and has a C-shaped annular portion 35A rotatably mounted in the holder mounting groove portion 31B on the outer circumference of the outer tube 31, and tongue pieces at both ends of the annular portion 35A. And a tightening portion 35B.

The holder 35 includes a dust boot mounting groove portion 35C and a speedometer cable fixing portion 35D.

However, in the front fork, as shown in FIGS. 6 and 7, the concave notch 41 is formed on the axial end surface of the holder 35. In addition, the outer tube 31
An annular rib 42 for processing a caulking portion 42A that engages with the cutout portion 41 of the holder 35 is formed on the outer periphery (a portion adjacent to the holder mounting groove portion 31B).

The procedure for assembling the axle bracket 33 and the holder 35 to the outer tube 31 will be described below. (1) The axle bracket 33 is screwed onto the external thread 31A of the outer tube 31 (FIG. 5).

(2) The outer circumference of the outer tube 31 is set so that the axle bracket 33 and the holder 35 are in a predetermined circumferential relative position (the speedometer cable fixing portion 35D of the holder 35 is opposite to the axle bracket 33 by 180 degrees). The crimp portion 42A is processed on the rib 42 of FIG. 7 (FIG. 7 (A)).

(3) With the notch 41 of the holder 35 engaged with the caulking portion 42A for positioning, the holder 35
Is attached to the holder mounting groove portion 31B of the outer tube 31 (FIG. 7 (B)).

(4) The holder 35 is fastened to the outer circumference of the outer tube 31 with the bolt 43 (FIG. 6).

A speedometer cable attachment 44 is attached to the speedometer cable fixing portion 35D of the holder 35, and a speedometer cable 45 connected to a speed detector attached to the axle bracket 33 is fixed to this attachment 44. To be done.

The lower end of the dust boot is fixed to the dust boot mounting groove 35C of the holder 35 by a boot band.

The operation of this embodiment will be described below. After the axle bracket 33 is screwed to the outer tube 31 and the attachment position of the axle bracket 33 with respect to the outer tube 31 is fixed, the outer bracket 31 and the holder 35 are placed so that the axle bracket 33 and the holder 35 have a predetermined circumferential relative position. The crimp portion 42 is attached to the annular rib 42 on the outer circumference of the tube 31.
Process A. Then, the holder 35 is fastened to the outer circumference of the outer tube 31 in a state where the notch 41 of the holder 35 is engaged with the caulking portion 42A and positioned. As a result, the holder 35 is easily positioned and attached at a predetermined circumferential position with respect to the axle bracket 33 screwed into the outer tube 31.

Even in the use state, the holder 35 is
The notch 41 and the caulking portion 42 on the outer tube 31 side
It is prevented from rotating by the engagement with A and the fastening force of the holder 35, and the positioning state with respect to the axle bracket 33 is maintained.

In a front fork in which the axle bracket 33 and the holder 35 are separate from the outer tube 31, the axle bracket 3 screwed to the outer tube 31 is used.
The mounting position of the holder 35 with respect to 3 can be easily positioned.

The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and changes in design within the scope not departing from the gist of the present invention can be made. Even if it exists, it is included in the present invention. For example, the holder includes a brake hose mounting portion (brake hose mounting tool 24
Equivalent) or a speedometer cable mounting portion (corresponding to the speedometer cable mounting tool 44) or the like may be integrally formed.

[0050]

As described above, according to the present invention, in a front fork in which the axle bracket and the holder are separate from the outer tube, the holder can be easily attached to the axle bracket screwed to the outer tube. It can be positionable.

[Brief description of drawings]

FIG. 1 is a schematic view showing a front fork according to a first embodiment.

FIG. 2 is a schematic view showing an outer tube of the first embodiment.

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

FIG. 4 is a schematic view showing a fastening state of a fastening band to an outer tube.

FIG. 5 is a schematic diagram showing an outer tube of a second embodiment.

6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a schematic view showing a fastening state of the holder to the outer tube.

[Explanation of symbols]

10 front forks 11,31 outer tube 12 Inner tube 13,33 axle bracket 14 tightening band 14A annular part 14B tightening part 15, 35 holder 15A, 35A annular part 15B, 35B tightening part 21, 41 Notch 22, 42 ribs 22A, 42A crimping section

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-185883 (JP, A) Actual flat 2-17493 (JP, U) Actual flat 2-142393 (JP, U) Actual flat 3- 26693 (JP, U) Actual Kaihei 6-87187 (JP, U) Japanese Patent Publication 4-54098 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) B62K 25/08

Claims (3)

(57) [Claims] 1. A holder fixing structure for a front fork in which an inner tube is slidably fitted in an outer tube, an axle bracket is screwed into the outer tube, and an annular holder is attached to the outer circumference of the outer tube. Has an annular part that is rotatably mounted on the outer circumference of the outer tube and fastening parts at both ends of the annular part so that it can be fastened to the outer circumference of the outer tube and has a notch on the axial end face of the holder. A holder fixing structure for a front fork, characterized in that an annular rib is formed on the outer circumference of the outer tube for processing a caulking portion that engages with the notch of the holder. 2. A holder fixing structure for a front fork, wherein an inner tube is slidably fitted in the outer tube, an axle bracket is screwed into the outer tube, and an annular holder is attached to the outer circumference of the outer tube. A metal tightening band having an annular part that is rotatably mounted on the outer circumference of the tube and tightening parts at both ends of the annular part can be fastened to the outer circumference of the outer tube, and the axial end surface of the tightening band A notch is formed on the outer tube, and an annular rib is formed on the outer circumference of the outer tube for processing a caulking portion that engages with the notch of the tightening band. The front fore is characterized in that the holder can be non-rotatably attached to the outer periphery through the tightening portion. Holder fixing structure of. 3. The holder fixing structure for a front fork according to claim 1, wherein the holder is a holder for fixing a brake hose.