JPS592961Y2 - Air sensor mounting device for shaft drive motorcycles - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air sensor mounting device that is mounted on a motorcycle and is used to remotely indicate abnormalities in tire air pressure such as a puncture.

More specifically, in shaft drive motorcycles in which the rear wheel is driven by a propulsion shaft, the receiving means is attached to the vehicle body using fasteners such as bolts and nuts that connect the rear fork and the gear box, and the receiving means is attached to the rear wheel. The present invention relates to an air sensor mounting device for a shaft drive type motorcycle, which allows a receiving means that constitutes an air sensor together with an attached transmitting means to be easily mounted using existing parts.

2. Description of the Related Art Air sensors are known that are mounted on motorcycles and remotely display when the tire air pressure drops below a specified value due to a tire blowout, etc., so that the driver can sense it using a lamp or the like.

The air sensor is attached to a rotating wheel, and has a transmitting means that introduces tire air pressure, and is attached to the vehicle body side corresponding to this transmitting means, and receives an abnormal tire pressure drop signal from the transmitting means and sends an alarm display means such as a lamp. and receiving means for activating.

The mounting positions of the transmitting means on the wheel side and the receiving means on the vehicle body are not limited to specific positions as long as the air sensor can be operated reliably, but in a motorcycle configured by combining a large number of devices, When installing a new air sensor, using bolts and nuts specifically designed for the air sensor increases the number of parts, and the installation process is time-consuming and troublesome. Therefore, it is desirable to avoid this.

In view of such requests, the present inventor has developed the present invention in order to effectively meet the demand, and in particular, the present inventor has developed the present invention to deal with shaft drive type motorcycles whose drive system is composed of a propulsion shaft rather than a chain. It is something.

The purpose of the present invention is to provide a shaft drive type motorcycle in which the rear wheel is driven by the propulsion shaft. The receiving means is attached to the vehicle body using fasteners such as bolts and nuts that connect it to the gear box incorporating the final gear that rotates the rear wheels with power, and the air sensor is constructed by combining it with the transmitting means. To provide a mounting device for an air sensor in a shaft drive type motorcycle, in which a receiving means for transmitting the signal can be mounted using the above-mentioned fastener which is a part of the motorcycle, and existing parts can be used.

A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows a shaft drive type motorcycle 1 to which the present invention is applied.

A propulsion shaft 4 is connected to an output shaft 3 extending from an internal combustion engine 2 through a universal joint 5.
The propulsion shaft 4 extends to the rear of the vehicle body, and a pinion 6 is provided at the rear end, and the pinion 6 is meshed with the final gear 7.

The final gear 7 is provided on an axle 9 that supports a rear wheel 8, and the output of the internal combustion engine 2 is transmitted through an output shaft 3, a propulsion shaft 4, and a pinion 6.
, are transmitted to the rear wheels 8 through the final gears 7, respectively, and the rear wheels 8 are driven to rotate.

FIG. 2 is a partially cutaway plan view of the area around the rear wheel 8 and the rear fork. Both ends of the axle 9 of the rear wheel 8 are supported by a fork 11, and the front end is connected to a pivot shaft 12 so as to be able to swing up and down. The rear wheel 8 is movable up and down by the fork 11 to follow the unevenness of the road surface.

At least one of the two fork members 11 a and 11 b that constitute the rear fork 11 and extend toward the rear of the vehicle body.
A is formed in the shape of a hollow pipe, and the propulsion shaft 4 is inserted inside.

A gear box 13 is formed on the outer periphery of the axle 9, the final gear 7 connected to and driving the rear wheel 8 is built into the gear box 13, and the pinion 6 fixed to the terminal end of the propulsion shaft 4 is installed. It faces inside the gear box 13 and meshes with the final gear 7.

The propulsion shaft 4 is formed by connecting a first shaft 4a on the internal combustion engine 2 side and a second shaft 4b on the axle 9 side, and has a connecting member 4C interposed at the connecting part, and is spline-fitted with the connecting member 4C. The propulsion shaft 4 is connected and integrated.

A fastener 14 is attached to the rear end of the fork member 11a of the fork 11 through which the propulsion shaft 4 is inserted and accommodated, and to the gear box 13.
The rear fork 11 and gear box 13 are connected by
Connect with.

This connection work is performed when assembling the motorcycle, and the connection is performed after spline fitting of the connecting member 4C. Therefore, the fastener 14 performs spline fitting of the connecting member 4C of the propulsion shaft 4 when assembling the motorcycle. Best rear fork 1
1 and the gear box 13.

In this embodiment, this fastener 14 is a threaded rod 14 protruding from the gear box 13, as is clear from FIGS. 3 and 4.
a and a nut 14b screwed onto the threaded rod 14a; however, this is not limited to this embodiment; for example, the rear end of the rear fork 11 may be screwed onto the gear box 13 with a bolt. , the present invention is also applicable to such embodiments.

The air sensor 15 consists of a transmitting means 16 on the wheel side and a receiving means 17 on the vehicle body side, and the transmitting means 16 is connected to a spoke plate connecting the rim 18 of the rear wheel 8 and the hub 19 as shown in FIG.
Attach it to 20.

This transmitting means 16 communicates with the inner chamber of the tire 21 via a pipe member (not shown), and the tire air pressure is guided inside.

Also, a magnet is incorporated inside the tire, supported by a floating plate made up of a diaphragm and a leaf spring, and the magnet is retracted when the tire air pressure is normal.

When the air pressure decreases due to a puncture, etc., the elastic force of the spring overcomes the air pressure, causing the magnet to move forward, and the receiving means 1
Approaching 7.

This receiving means 17 includes a reed switch 17 as shown in FIG.
The reed switch 17a is forced to close by the magnetic action of the magnet that moves forward, and a warning display means such as a lamp is activated to make the driver aware of an abnormality in the tire air pressure.

When attaching the transmitting means 16 of the rear wheel 8, the mounting position should be near the joint between the rear fork 11 and the gear box 13 by the fastener 14, and the transmitting means 16 should face this joint in the width direction of the vehicle body. Make it.

The receiving means 17 is attached to the vehicle body using a support stay 22. The receiving means 17 is connected to the front end of the stay 22 with a bolt and a nut 23, and the rear part of the stay 22 is attached to the fastener 14.
When the fork member 11a of the rear fork 11 and the gear box 13 are collinear and the receiving means 17 is attached, a fastener that is a part of the motorcycle 1 is used to connect the rear fork 11 and the gear box 13. Use 14.

Here, the receiving means 17 attached to the support stay 22 is connected to the rear fork 11 a as shown in FIGS. 2 to 4.
It is arranged inside the inner surface facing the rear wheel 8 side.

By doing this, the receiving means 17 can be connected to the glossy fork 11.
a can effectively protect from external foreign matter.

Further, since the support stay 22 is collinearly connected by the fastener 14 closer to the rear wheel 8 side, the overhang of the stay 22 toward the rear wheel 8 side can be reduced.

Thereby, the transmitting means 16 and the receiving means 17 constituting the air sensor 15 are mounted on the motorcycle 1 facing each other in the width direction of the vehicle body.

As is clear from the above explanation, according to the present invention, in a shaft drive type motorcycle in which the drive system is configured with a propulsion shaft, the receiving means can be attached to the vehicle body using a fastener that connects the rear fork and the gear box. As a result, it is no longer necessary to prepare bolts, nuts, etc. exclusively for the receiving means when attaching the receiving means to the vehicle body, and the receiving means that constitutes the air sensor together with the transmitting means can be attached to a component that is a part of the motorcycle. It can be assembled to the vehicle body using existing parts, and the number of parts does not increase by using existing parts, and the installation work is also simplified, which is a great contribution to the installation of the air sensor.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a rear perspective view of a shaft drive type motorcycle, Fig. 2 is a rear perspective view of a shaft drive type motorcycle,
FIG. 3 is an enlarged view of the main part of FIG. 2 with the transmitting means taken in section, and FIG. 4 is a front view of FIG. 3. In the drawings, 1 is a motorcycle, 4 is a propulsion shaft, 7 is a final gear, 8 is a rear wheel, 11 is a rear fork, 13 is a gear box, 14 is a fastener, 15 is an air sensor, 16 is a transmitter, 17 is the receiving means.

Claims (1)

[Scope of utility model registration request] In a shaft drive type motorcycle that is equipped with an air sensor consisting of a transmitting means and a receiving means opposite thereto and drives the rear wheel by a propulsion shaft, the transmitting means is attached to the rear wheel and the final gear box is coupled to the fork. The support stays are collinear with the fasteners closer to the rear wheel side, the receiving means is attached to the support stays, and the receiving means is further disposed inside the inner surface of the rear fork facing the rear wheel side. Features: Air sensor mounting device for shaft drive motorcycles.