JPH01229789A - Protector device for front fork - Google Patents

Abstract

PURPOSE:To prevent the entrance of mud, small stones, etc., improve the sliding property of a protector, while also make the appearance favorable by fitting a slide portion into a guide groove to slide the protector up/down while covering a holder. CONSTITUTION:A cylindrical holder 8 is fitted on the outer periphery of the lower large diameter portion 1a of an outer tube 1 and fixed thereto via detents 9 such as machine screws, etc., to restrict the movement thereof in the up/down direction and rotating direction, and a guide member 10 is projected out on the front side of the holder 8 while forming guide grooves 11, 11 on both sides thereof. At the time of sliding a front fork 4, the protector 5 slides in the guide grooves 11, 11 of the holder 8 via slide portions 12, 12. In this case, both slide portions are positioned inside the protector 5 and mud, small stones, etc., which are spattered from the front side are stopped by the protector 5 itself preventing them from entering the slide portions. Further, the guide member 10, etc., are hidden inside the protector 5 making an appearance favorable.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a front fork that is interposed between the body of a motorcycle or the like and an axle and serves as a shock absorber and a shock absorber for damping vibrations from the road surface. The present invention relates to a protector device for protecting the front fork.

[Conventional technology]

As a conventional protector device of this kind for a front fork, the one disclosed in Japanese Utility Model Application Laid-Open No. 59-47587, for example, is known.

In this device, the lower end of an elongated protector with an arcuate cross section is attached to the axle metal fitting provided at the lower end of the inner tube, and the upper part of the protector is slidably inserted into the guide hole of the holding piece attached to the lower part of the outer tube. The piece is wrapped around the lower periphery of the outer tube and then tightened with bolts and nuts. When the front fork expands and contracts, the protector moves up and down along the guide hole to prevent stones and mud from the road surface from colliding with or adhering to the front fork.

[Problem to be solved by the invention]

In the conventional protector device described above, the upper part of the protector is slidably inserted into the guide hole exposed to the outside of the holding piece.
Therefore, it is easy for mud, pebbles, etc. to enter the guide hole and get stuck.
This may damage the protector or increase the sliding resistance, adversely affecting the operability of the front fork. Moreover, the retaining piece protrudes outward, and the bolts and nuts that tighten it are also exposed, resulting in an inferior appearance.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a protector device that prevents mud, pebbles, etc. from entering the protector, improves the slidability between the protector and the front fork, and has a good appearance.

[Means to solve the problem]

In order to achieve the above object, the present invention has a structure in which a front fork is constructed by slidably inserting an inner tube into an outer tube, and a lower part of a protector that covers the front fork is attached to a bracket on the inner tube side. In the fork protector device, a holder is provided on the outer tube, the upper part of the protector is arranged to cover the holder, a guide groove or a sliding part is provided on either the protector or the boulder, and the sliding part is placed in the guide groove. The protector is characterized in that when fitted, the protector slides vertically while covering the holder.

[For production]

The protector slides in the vertical direction via the slide portion that fits into the guide groove, and since the protector covers the holder, mud, pebbles, etc. do not enter the sliding portion consisting of the guide groove and the slide portion.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

A front fork 4 is constructed by slidably inserting an inner tube 3 connected to an axle-side bracket 2 into an outer tube 1 connected to the vehicle body.

On the front side of the front fork 4, a protector 5 is arranged, which is elongated and has an arcuate cross section and is wider than the diameter of the front fork. The lower part of this protector 5 is the bracket 2
The upper part of the protector 5 is attached to the front fork via a sliding part inside thereof so as to be vertically movable, as will be described later.

Figure 2 shows an embodiment of a sliding part that connects the protector 5 to the front fork.

A cylindrical holder 8 is fitted onto the outer periphery of the lower large diameter Mlα of the outer tube 1, and this holder 8 is fixed to the large diameter portion lα via a fastener 9 such as a screw or bolt, and is prevented from moving in the vertical and rotational directions. is regulated.

A guide member lO protrudes from the front side of the holder 8, and guide grooves 11.1 are formed along both sides of the guide member 10 in the axial direction.
1 is formed.

A slide portion 12.12 having an angular cross section is formed along the axial direction inside the protector 5, and this slide portion 12.
12 is fitted into the guide grooves 11, 11 so as to be slidable up and down.

The slide portion 12.12 is not limited to the shape shown.

When the front lock 4 slides, the protector 5 slides the holder 8 via the slide portion 12.12. On this occasion,
Guide groove 11.11 and slide □ section 12.1
Since the sliding part consisting of 2 is located inside the protector 5, mud, pebbles, etc. flying from the front side are blocked by the protector 5 itself and are prevented from entering the sliding part.

Since the guide member 10 and the like provided on the holder 8 are hidden inside the protector 5, the appearance becomes smart.

Since the slide portions 12.12 provided on the protector 5 are provided on the inside thereof, the width of the protector 5 can be made larger, and the area covering the front fork can be made larger.

Figure 3 shows another embodiment of the sliding part.

This is a reverse version of the case shown in Figure 2, with a guide groove provided in the protector and a sliding portion provided in the holder.

A holder 8α curved toward the front side of the large diameter portion lα of the outer tube l is fixed with a stopper 9 such as a screw to restrict movement in the vertical direction and rotational direction.

Horizontal plate-shaped sliding parts 12a are provided on both sides of the holder 8α.
, 12α are integrally formed.

On the other hand, thick portions 5h, 54 are formed near both sides of the protector 5α, and a guide groove 11 (Z, 11α) is formed along the axial direction inside the thick portion 54.5h.
The slide portions 12α, 12α are slidably fitted into the insides of the slide portions 1a, 11α.

The action and effect are the same as the embodiment shown in Figure 2.

〔Effect of the invention〕

According to the present invention, there are the following effects.

■Since the sliding part consisting of the guide groove and the sliding part is located inside the protector, mud, pebbles, etc. flying from the front are blocked by the protector and do not enter the sliding part. This prevents damage to the slidability between the protector and the front fork.

■The holder and sliding parts that guide the protector are covered with the protector and are not exposed to the outside, giving the front fork a sleek and beautiful appearance.

■The sliding part that guides the protector is on the inside of the protector, and there are no members that interfere with both sides of the protector, so the protector can be made wider and the area that covers the outer periphery of the front fork can be increased.

■Since the outer surface of the protector does not interfere with or come into contact with other members, it is possible to attach patches or advertisements to this outer surface.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway side view of a front fork equipped with a protector device according to an embodiment of the present invention, and Figure 2 is a side view of a front fork provided with a protector device according to an embodiment of the present invention.
The enlarged cross-sectional view taken along the line A--A in the figure and Figure 3 are cross-sectional views of a protector device according to another embodiment. 1... Outer tube, 2... Bracket, 3...
...Inner tube, 4...Front fork, 5
．． 56...Protector, 8,8α...Holder, 11
．． 11α...Guide groove, 12.12α...Slide part. Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] In a front fork protector device in which a front fork is constructed by slidably inserting an inner tube into an outer tube, and a lower part of a protector that covers the front fork is attached to a bracket on the inner tube side, a holder is provided in the outer tube. By arranging the upper part of the protector to cover the holder, providing a guide groove or a slide part on either the protector and the holder, and fitting the slide part into the guide groove, the protector can slide vertically while covering the holder. A front fork protector device characterized by: