JPH0447034Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The invention relates to a casing for holding a central drive of a bicycle or similar vehicle.

(Prior art) For example, in a competition bicycle, the casing body that houses and holds the central drive part of the bicycle has a lower part for reducing the weight of the bicycle and for draining condensed water such as condensation or water that has entered the casing body. An opening is formed that opens toward the road.

Although this casing body is satisfactory in terms of weight reduction and strength, it is susceptible to harmful impacts from pebbles and similar objects thrown up by the front wheels, and pebbles and the like may be thrown into the casing from the opening. It penetrates the main body and does not adequately protect the delicate central drive section.

Therefore, the deformation of the casing body due to impact and the intrusion of small stones etc. may adversely affect the central drive section.
The increased dynamic friction in the central drive significantly increases the wear of the central drive.

(Problem to be solved by the invention) As is well known, in competition bicycles, wear of parts may be tolerated, but in general, in vehicles such as bicycles, undesirable increases in friction and wear are tolerated. It is not possible.

The main object of the invention is therefore to provide a casing capable of adequately protecting the central drive of a bicycle or similar vehicle, which effectively overcomes the aforementioned drawbacks and which allows providing the ability to discharge or release condensate water,
On the one hand, it prevents the ingress of pebbles or the like into the casing body, ensuring a corresponding reduction in wear.

Another object of the invention is to provide the casing body with a cable guide groove that is as protected as possible from impacts from stones or the like, in order to obtain the above-mentioned favorable conditions.

(Means for Solving the Problems) A casing for holding a central drive part of a bicycle and similar vehicles according to the present invention that achieves the above object has a central axis extending in a direction perpendicular to the traveling direction, a casing body that accommodates and holds the casing body; a plurality of openings that are formed parallel to the central axis and pass through the lower part of the casing body; It has a spoiler whose rear end reaches below the casing body to protect the opening and to apply negative pressure to the opening.

(Embodiment) Hereinafter, an embodiment of the casing for housing and holding the central drive unit of a bicycle and similar vehicles of the present invention will be described with reference to drawings, taking as an example a case where the casing is applied to a bicycle. It is not limited by.

The casing in this embodiment is shown more generally in the figure, and has a casing body 1 that has a central axis extending along a direction perpendicular to the running direction F, and that houses and holds a central drive section A. . The casing body 1 is provided with a spoiler 2 that is parallel to the central axis of the casing body 1 and extends substantially over the entire width of the casing body 1. The spoiler 2 has a curved shape, and its front end is connected to the front side of the casing body 1 in the running direction, and the spoiler 2 curves approximately along the casing body 1 while gradually separating from the casing body 1, and its rear end is connected to the front side of the casing body 1 in the running direction. It has reached the bottom. The lateral ends of the spoiler 2 are closed by side walls 2A, which allow the geometrical center B of the central drive A to be
It has a space that increases from

The spoiler 2, whose side end is closed by the side wall 2A, is installed parallel to the central axis of the casing body 1, and is formed so that its dimensions gradually decrease as it passes through the lower surface of the casing body 1. It spreads out so as to cover and protect the plurality of openings 3.

The opening 3 is an elongated hole parallel to the central axis of the casing body 1, is not radial, is slanted downward in a direction opposite to the running direction F of the bicycle, and is formed in the casing body 1. It is laterally surrounded between the first wire guide groove 5 and the second wire guide groove 6.

The first wire guide groove 5 is located on a line connecting a first through hole 7 formed through the vicinity of the front end of the spoiler 2 and a guide channel-shaped through lug 8 disposed in the lower part of the casing body 1. It is set in.

This makes it possible to guide the wire 15 inserted from the first through hole 7 to the through lug 8 via the guide groove 5 .

The second wire guide groove 6 is a line connecting a second through hole 9 formed through the spoiler 2 and a hole 10 formed on a reinforcing rib 11 connecting two rear cups 12 serving as reinforcing members. The wire 14 inserted into the second through hole 9 is guided to the hole 10 via the second wire guide groove 16. The two rear cups 12 are each integrally formed with the casing body 1, and accommodate and hold a tube 13 which becomes a rear connecting rod of a bicycle frame.

Therefore, the wires 14 and 15 that are fitted and guided into the first and second wire guide grooves 5 and 6 are covered by the spoiler 2 and are protected from impact from pebbles and the like.

The dimensions of the opening 3 gradually become smaller in the direction opposite to the running direction F of the bicycle.

While the bicycle is traveling in the direction of travel F, in a normal type of bicycle, the air flow completely surrounds the casing and is diverted away from the opening 3 by the vortices created by the spoiler 2 and thereby A negative pressure effect is provided, making it possible to suction the condensate present in the casing body 1.

Although the present invention has been described above as applied to a bicycle, it can also be applied to a casing for holding a central drive section of other bicycle-like vehicles.

According to the casing for holding the central drive part of a bicycle or similar vehicle as described above, the front end of the casing body is connected to the traveling direction part of the casing body, extends along the casing body, and the rear end is connected to the lower part of the casing body. Since the spoiler is provided with a curved shape that extends over the opening and is configured to protect the opening and apply negative pressure to the opening, the spoiler protects the casing body and, therefore, the central drive unit from impacts and intrusion of small stones. In addition, by discharging condensed water within the casing body, it has the effect of preventing an increase in dynamic friction in the central drive section and reducing wear. The wire to be fitted is covered with a spoiler, which has the effect of protecting it from impact from pebbles and the like.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing one embodiment of a casing for accommodating and holding a central drive section of a bicycle or similar vehicle according to the present invention;
The figure is a sectional view taken along the - line in FIG. 1. 1... Casing body, 2... Spoiler, 3
... Opening, 5, 6 ... Wire guide groove, 8 ... Penetration lug, 11 ... Reinforcement rib (reinforcement member).

Claims (1)

[Claims for Utility Model Registration] (1) A casing body 1 having a central axis extending in a direction perpendicular to the running direction F and housing and holding the central drive part A; A plurality of openings 3 passing through the lower part of the main body 1
The front end is connected to the front side of the casing main body 1 in the traveling direction, and the shape extends along the casing main body 1 and the rear end reaches below the casing main body 1 to protect the opening 3 and apply negative pressure to the opening. Casing for holding the central drive of a bicycle or similar vehicle, characterized in that it has a spoiler 2. (2) The casing according to claim 1 of the utility model registration, characterized in that the opening 3 gradually becomes smaller as it moves in the direction opposite to the running direction F. (3) The casing according to claim 1, wherein the casing body 1 has wire guide grooves 5 and 6 extending in the running direction F along the sides of the opening 3. (4) The casing body 1 has first and second wire guide grooves 5 and 6, and the first wire guide groove 5 connects the first through hole 7 formed near the front end of the spoiler 2 and the casing body 1. Reinforcement that connects the two rear connecting rods 12 to the second through hole 9, in which the second wire guide groove 6 is formed near the front end of the spoiler 2, on a line connecting the through lugs 8 provided at the lower part of the spoiler. Each hole is formed on a line connecting the hole 10 formed in the member 11,
A casing according to claim 1 of the utility model registration claim. (5) The casing according to claim 1, wherein the opening 3 is inclined downward in a direction opposite to the running direction F.