JPH0629186Y2 - Support device for fork protector of inverted front fork - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Use) The present invention relates to a fork protector supporting device for an inverted front fork applied to a motorcycle or the like.

(Prior Art) As is well known, an inverted front fork of a motorcycle has a structure in which an inner tube projects below an outer tube attached to a steering pivot shaft. In this inverted front fork, the inner tube that appears in and out of the outer tube is close to the front wheel, so a fork protector is provided to protect the inner tube from the front so as not to impair the damper function due to the appearance of the inner tube. Generally, the lower end of a fork protector is fixed to the lower end of the inner tube via a bracket, and the upper end of the fork protector is slidable in the vertical direction by a frame-shaped protector guide attached to the outer tube and regulates the front-rear and left-right positions. Supported. That is, the protector guide is supported together with the inner tube so as to be vertically movable relative to the outer tube.

(Problems to be solved by the invention) However, in the conventional device, the protector guide attached to the outer tube rotates when the motorcycle falls over while the motorcycle is running, or when it comes into contact with another motorcycle. There were cases. When the protector guide rotates, friction loss increases due to contact with the fork protector,
Further, if the turning angle is large, problems such as damage to the fork protector occur. Also, when assembling the vehicle body, it is necessary to align the center of the fork protector with the center of the protector guide so that friction loss is minimized. .

The present invention has been made in view of such circumstances, and it is possible to prevent rotation of the protector guide, thereby reducing friction loss and preventing damage of the fork protector.
Another object of the present invention is to provide a fork protector support device for an inverted front fork that facilitates positioning of the protector during vehicle body assembly and reduces the number of work steps.

[Constitution of device]

(Means for Solving the Problems) A fork protector support device for an inverted front fork according to the present invention is an inverted front fork in which an inner tube projects below an outer tube, and protects the inner tube from the front. The lower end of the fork protector is fixed to the lower end of the inner tube, and the upper end of the fork protector is slidable in the vertical direction by a frame-shaped protector guide attached to the outer tube. In which the outer tube is regulated and supported, a detent member that integrally projects to the outer peripheral surface side of the outer tube and that blocks the rotation of the protector guide around the outer tube is provided.

(Operation) According to the present invention, since the rotation preventing member integrally protruding to the outer peripheral surface side of the outer tube prevents the protector guide from rotating around the outer tube, the motorcycle may fall or fall. Even if the vehicles contact each other, the friction loss between the fork protector guide and the protector guide does not increase, and the fork protector is not damaged.

Further, when assembling the vehicle body, the protector guide can be positioned with the anti-rotation member as a reference, so that the center position of the fork protector and the protector guide can be easily and reliably performed.

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

FIG. 1 is an overall view showing an inverted front fork portion of a motorcycle, and FIGS. 2 and 3 are enlarged views showing a fork protector supporting device portion.

In this embodiment, as shown in FIG. 1, the outer tube 1
Is attached to a steering pivot shaft (not shown) via an upper bracket 2 and an under bracket 3, and an inner tube 5 projects below the outer tube 1 via a seal cap 4. An axle bracket 6 is attached to the lower end of the inner tube 5, and a front wheel 7, a disc plate 8, a caliper 9 and the like are supported by the axle bracket 6.

As shown in FIGS. 2 and 3, the fork protector 10 is in the form of a channel that covers the front side of the inner tube 5, and is arranged in parallel in front of the inner tube 5 with a predetermined gap. The fork protector 10
A brake hose 11 for supplying brake hydraulic pressure to a caliper 9 from a brake master cylinder (not shown) is held therein. The lower end of the fork protector 10 is fixed to the axle bracket 6 via a support bracket 12, and the upper end of the fork protector 10 is slidable in the vertical direction by a frame-shaped protector guide 13 attached to the seal cap 4 and can be moved in the front-rear and left-right positions. It is inserted and supported to regulate. That is, the seal cap 4 is screwed onto the lower end portion of the outer tube 1 and holds the oil seal therein. A locking projection 14 as a rotation stopping member for the protector guide 13 is integrally provided on a part of the outer circumference of the seal cap 4. The locking projection 14 has a substantially rectangular shape, and the seal cap 4 is arranged in front of the outer tube 1 at a final position where the seal cap 4 is screwed into the outer tube 1.

On the other hand, the protector guide 13 is composed of a tubular portion 13a fitted into the seal cap 4 and a frame-shaped portion 13b surrounding the fork protector 10. The protector guide 13 extends from the central position of the tubular portion 13a to the tip of the frame-shaped portion 13b. The structure is divided vertically. Then, a locking piece 15 for sandwiching the locking projection 14 from both sides is formed opposite to the base of the frame-shaped portion 13b, and the vicinity of the locking piece 15 is provided with the locking projection 14.
A pair of upper and lower tightening tools 18 including bolts 16 and nuts 17 for tightening from both sides are attached to the. By this tightening of the tightening tool 18, the locking projections 14 of the seal cap 4 are clamped by the locking pieces 15 of the protector guide 13.

According to the apparatus of such an embodiment, the locking protrusion 14 of the seal cap 4 screwed and fixed to the outer tube 1 constitutes a detent member which is integral with the outer tube 1, and thus the protector guide 13 serves as the outer tube. The rotation about one turn is blocked. Therefore,
The protector guide 13 does not rotate even when the motorcycle falls or the vehicles contact each other, and the frame-shaped portion 13b of the protector guide 13 and the fork protector inserted and supported in the interior thereof so as to be vertically slidable. The friction loss between the fork protector 10 and the fork protector 10 does not increase, and the fork protector 10 is not damaged.

Further, at the time of assembling the vehicle body, the locking projection 14 of the seal cap 4 as a rotation preventing member is fixedly arranged at the front position by being screwed into the outer tube 1, so that the locking piece 15 of the protector guide 13 is locked to the locking projection 14. The center of the protector guide 13 and the center of the fork protector 10 can be easily aligned with each other only by setting them at the sandwiching position, and the number of assembling steps can be reduced by omitting troublesome positioning.

[Effect of device]

As described above, according to the fork protector support device of the inverted front fork according to the present invention, the rotation of the protector guide can be prevented, so that the friction loss of the fork protector can be reduced and the damage can be prevented. Positioning of the protector at the time of assembly becomes easy, and the number of working steps can be reduced.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a side view showing the overall structure of a front fork part, and FIG. 2 is an enlarged view showing a fork protector supporting device part of FIG. The drawing is a sectional view taken along the line III-III in FIG. 1 ... Outer tube, 5 ... Inner tube, 10 ...
… Fork protector, 13 …… Protector guide, 1
4 ... Locking protrusion (stop member).

Claims (1)

[Scope of utility model registration request] 1. An inverted front fork having an inner tube protruding below an outer tube, wherein a lower end side of a fork protector for protecting the inner tube from the front is fixed to a lower end portion of the inner tube.
An outer peripheral surface side of the outer tube in which the upper end side of the fork protector is supported by a frame-shaped protector guide attached to the outer tube so as to be slidable in the vertical direction and regulated in the front-rear and left-right positions. A fork protector support device for an inverted front fork, characterized in that a detent member that integrally projects with and prevents rotation of the protector guide around the outer tube is provided.