JPS621820Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is a motorcycle in which the position of the anti-lock brake modulator does not need to be adjusted even if the position of the rear axle is moved to adjust the tension of the rear wheel drive chain. This invention relates to an anti-lock brake modulator mounting device.

The ideal braking effect of vehicle brakes is achieved when the force that stops the wheels relative to the vehicle body and the frictional force generated between the wheels and the road surface are balanced. Since the frictional force generated between the wheels and the road surface is related to the weight of the vehicle, the force that stops the wheels relative to the vehicle body also needs to be varied depending on the weight of the vehicle. If the force used to stop the wheels is too large relative to the weight of the vehicle, the wheels will remain stationary and slide on the road. This is generally called wheel lock or skid, and is dangerous, so efforts are being made to prevent it.

Various devices have been devised and put into practical use to prevent wheels from locking, one of which is a flywheel that rotates at the same time as the wheels and a thruster installed near the flywheel. This system detects whether the wheels are locked by shaft movement in response to relative angular movement between the wheels and other parts, and when the wheels are locked, restricts the flow of brake fluid from the master cylinder to the wheel cylinders to prevent the wheels from locking. (Refer to Japanese Unexamined Patent Publication No. 55-36186). This device is called an antilock brake modulator (hereinafter referred to as a modulator).

By the way, when trying to install this modulator on a motorcycle, there are the following problems. In other words, since motorcycles normally drive the rear wheel, which is the driving wheel, by a chain, when the chain is extended and adjusted to absorb this, the rear axle (hereinafter referred to as the axle) that has moved to do so Since the positional relationship between the motor and the modulator becomes out of order, the modulator must be adjusted each time, which results in a problem of complicated work.

This invention aims to solve this problem, and one embodiment thereof will be described with reference to the drawings. 1 is the rear wheel of a motorcycle, and 2 is its axle. The axle 2 is inserted into and supported by a bracket 4 supported at the rear end of the swing arm 3 so as to be movable in the longitudinal direction of the swing arm 3. The bracket 4 can be installed by loosening the bolt 5 screwed onto the rear end of the swing arm 3.
This constitutes a movable chain tension adjustment mechanism. This movement is performed by loosening the lock nut 6 and using the bolt 7.

The axle 2 supports a rear wheel drive sprocket 8 that rotates together with the rear wheel 1, and a disc 9 that is part of a disc brake. An endless chain 10 is attached to the sprocket 8 and is adapted to transmit driving force from the transmission to the rear wheel 1. Since the sprocket 8 is supported by the axle 2, tension can be applied to the chain 10 by moving the bracket 4 to the left in the figure.

A pulley 11 is further supported on the axle 2 so as to rotate together with the rear wheel 1. A belt 16 is stretched between the pulley 11 and a pulley 15 attached to a rotating shaft 14 of a modulator 13 supported by a bracket 12. With this structure, when the rear wheel 1 rotates, the rotation shaft 14 of the modulator 13 also rotates. A hole 17 is provided in a part of the bracket 12, and the axle 2 is inserted through the hole 17.

A caliper 18 is also attached to the bracket 12 in front of the modulator 13. This caliper 18 constitutes a disc brake together with the disc 9, and the torque rod 19 receives the reaction force generated during operation. The tip of the torque rod 19 is pivotally attached to the front part of the swing arm 3.

In the above embodiment, the modulator 13 has the above-described structure, and the valve portion inside thereof includes:
Although the master cylinder and the wheel cylinder will be connected via a hose, illustration thereof will be omitted. Further, in the above embodiment, the rotating shaft 14 of the modulator 13 is driven by the pulleys 11, 15 and the belt 16, but it goes without saying that these may be replaced by a sprocket and a chain.

In this device configured as described above, when the chain 10 becomes slack due to stretching, the bolt 5 can be loosened and the bracket 4 can be moved to the left in the figure using the bolt 7.
Tension can be applied to the chain 10. At this time, the bracket 12 to which the modulator 13 is attached moves together with the axle 2, so that the pulley 15 of the modulator 13 and the pulley 1 supported by the axle 2 move together.
There is no change in the positional relationship with 1.

Since this invention is constructed as described above, there is an advantage that even if the tension of the chain 10 that drives the rear wheel 1 is adjusted, there is no need to adjust the modulator 13 accordingly.

[Brief explanation of the drawing]

The figure is a front view of one embodiment of this invention. 1... Rear wheel, 2... Axle, 3... Swing arm, 10... Chain, 12... Bracket, 13
...Modulator, 17...hole.

Claims (1)

[Scope of utility model registration request] An anti-lock mechanism for a motorcycle in which a tension adjustment mechanism for a rear wheel drive chain is provided at the rear end of a swing arm, characterized in that a hole through which a rear axle is inserted is provided in a bracket that supports an anti-lock brake modulator. Brake modulator mounting device.