JPS6020551Y2 - front fork device - Google Patents

Description

[Detailed Description of the Invention] The present invention mainly relates to an air suspension type front fork device for a two-wheeled motor vehicle.

Conventionally, as a device of this type, a pair of left and right front forks each having a gas chamber filled with high-pressure gas inside is arranged on both sides of the steering shaft and connected to each other by a horizontal bracket. For example, it is known from Japanese Utility Model Application Publication No. 51-153951 that the gas chambers of a pair of front forks are connected to each other through the hollow part of the bracket and the gas chambers of the front fork. The purpose of the present invention is to provide a device that does not have the disadvantage of difficulty in connecting with a gas chamber. A front panel in which a pair of left and right gas chambers 1.1 are arranged on both outer sides of a steering shaft 3 and connected to each other by a horizontal bracket 4, and the gas chambers 1.1 are connected to each other via a hollow part 6 provided in the bracket 4. In the fork device, each of the front forks 2, 2 has an annular groove 7 on the inner peripheral surface that communicates with the through hole 5 in the upper part of the gas chamber 1, and a communication hole 10 that communicates with the annular groove 7 is formed as a cylindrical protrusion. Part 11
The annular member 8 is fitted into the hollow part 6 provided in the bracket 4 through the cylindrical protrusion 11 thereof.
It is characterized in that it is fitted and connected to the downward openings 12 at each end.

In the illustrated example, an annular member 8 having an annular groove 7 on the inner circumferential surface that communicates with each through hole 5 is fitted to the outer periphery of each gas chamber 1, and is supported by a stopper ring 9 to prevent it from coming off. A cylindrical protrusion 11 having an internal communication hole 10 communicating with and extending into the groove 7 is integrally protruded and fitted into the downward opening 12 at each end of the hollow part 6. The through hole 5 is communicated with the end of the hollow portion 6 via the groove 7 and the communication hole 10.

In the drawings, reference numeral 13 indicates an O-ring on the inner peripheral surface of the annular member 8, and reference numeral 14 indicates a fork bolt at the top of each front fork 2.

In this way, according to the present invention, the hollow portion 6 provided in the bracket 4 and the gas chamber 1 provided in the front forks 2, 2 are connected via the annular member 8 fitted to the front forks 2, 2. Moreover, the annular member 8 has an annular groove 7 on its inner peripheral surface that communicates with the through hole 5 in the upper part of the gas chamber, and also has a communication hole 10 in the cylindrical protrusion 11 that communicates with the annular groove 7. ,
The hollow part 6 of the bracket 4 and the front forks 2, 2 are fitted and connected to the downward openings 12 at each end of the hollow part 6 provided in the bracket 4 via the cylindrical protrusion 11.
The communication with the gas chambers 1, 1 is easily and reliably carried out, and the communication is carried out regardless of whether the bracket 4 is fastened to the front forks 2, 2, so that the fastening can be strengthened. has.

[Brief explanation of drawings]

The drawing is a partially cutaway front view of one example of the present device. 1...Gas chamber, 2...Front fork, 3...Steering shaft, 4...
...Bracket, 5.5...Through hole, 6...
...Hollow part.

Claims (1)

[Scope of utility model registration request] A pair of left and right front forks 2 each having a gas chamber 1 that seals high-pressure gas inside is arranged on both sides of a steering shaft 3 and connected to each other by a horizontal bracket 4, and a hollow portion provided in the bracket 4 is used. 6 to each said gas chamber 1,
1, each of the front forks 2, 2 has an annular groove 7 on its inner peripheral surface that communicates with the through hole 5 in the upper part of the gas chamber 1, and a communication line that communicates with the annular groove 7. An annular member 8 having a hole 10 in a cylindrical projection 11 is fitted, and the annular member 8 is inserted into the downward opening 12 at each end of the hollow portion 6 provided in the bracket 4 via the cylindrical projection 11. A front fork device characterized in that it is fitted and connected to the front fork device.