JPS6031983Y2 - Spring bearing device for fork pipe - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a spring bearing device for a fork pipe of a motorcycle or a tricycle.

Conventionally, a front cushion mechanism is known in which a front fork is provided with a spring connected to a cushion rod and a spring seat that receives the upper end of the spring, but in this case, the spring seat is located inside the front fork. It is generally formed of a receiving member such as an inner bolt that is screwed into the
According to this, it is necessary to insert screws into the front fork, which causes the inconvenience that processing and assembly are time-consuming.

The object of the present invention is to provide a device that eliminates such inconveniences.The upper end of the fork pipe 1 is bent, the stem pipe 12 is connected to the bent part, and a cushion is provided inside the fork pipe 1. In a device comprising a spring 3 connected to the rod 2 and a spring seat received at the upper end of the spring, the spring seat is an inner surface formed by inwardly recessing the outer circumferential wall of the bent lower end of the fork pipe 1. It is characterized by being composed of projections 4.

In the illustrated example, a single pipe 5 is bent into an inverted U-shape to form a pair of left and right fork pipes 1, 1 on both sides of the pipe, and the upper inner surface of the pipe is bent inward at several points using a punch or the like. The upper end of the cushion rod 2 is recessed and has several protrusions 4 projecting thereon, the spring 3 is brought into contact with this through the cup 6 at the upper end, and the lower end is inserted into each fork pipe 1 from below. I was seated in cup 7 of.

In the drawing, reference numeral 8 indicates a holder arm connected to the lower part of each fork pipe 1, and a wheel bearing 9 at the tip of the holder arm 8 is attached to the holder arm 8.
The cushion rod 2 is pivotally connected to the axle bearing 9 by pivoting the pivot arm 10 provided with the pivot arm 10 such that the cushion rod 2 can move vertically and vertically. Accordingly, the spring 3 is provided with a cushioning effect.

In the drawings, reference numeral 11 indicates a rubber stopper that restricts upward movement of the cushion rod 2, and reference numeral 12 indicates a stem pipe connected to the central curved portion of the pipe 5.

In this way, according to the present invention, the spring seat formed on the fork pipe 1 whose upper end is bent to connect the stem pipe 12 is formed by inwardly recessing the outer circumferential wall of the bent lower end of the pipe 1. Since the spring seat is composed of a projection 4 formed on the inner surface, the spring seat is seated on the projection 4, which is a simple inward recess of the outer circumferential wall of the pipe, in conjunction with the bent portion of the pipe above the projection 4. This has the effect of making it possible to completely support the cup 7, thereby simplifying the machining of the pipe for forming the spring seat.

[Brief explanation of the drawing]

Figure 1 is a side view of a motorcycle to which the proposed device is applied;
The figure is a half-cut front view of one example of the device of the present invention, and FIG. 3 is a cut-away end view taken along the line ■-■ in FIG. 1...Fork pipe, 2...Cushion rod, 3...Spring, 4...Protrusion.

Claims (1)

[Scope of utility model registration request] The upper end of the fork pipe 1 is bent, the stem pipe 12 is connected to the bent part, and the fork pipe 1 is provided with a spring 3 connected to the cushion rod 2, and a spring seat for receiving the upper end of the spring. A spring receiving device for a fork pipe, characterized in that the spring receiving seat is constituted by an inner protrusion 4 formed by inwardly recessing the outer circumferential wall of the bent lower end of the fork pipe 1.