JP2554235Y2 - Caster angle adjustable front fork - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention can adjust the lightness and weight of the handling, and can also change the stability. From commercial vehicles, road racers and front forks The present invention relates to an improvement in a front fork that allows a single spanner to be easily used even when changing to a longer American, chopper, or the like, and allows a rider to decide handling of a motorcycle. (Conventional technology) Conventionally, the caster angle can be freely changed with a thick bolt. There is no front fork, and much more, as shown in FIG.
There is no mechanism for adjusting 3). We had to do welding to some extent just by intuition. Even if the front fork is lengthened and the caster angle is lowered, the caster angle can be adjusted when converting to an American or chopper, and there was no front fork that could return to normal immediately. We had to rely on welding. In the past, there was a first embodiment disclosed in Japanese Patent Application Laid-Open No. Sho 50-141054 (a front fork angle adjusting device for a motorcycle). However, when braking was suddenly performed, the adjusting plate -22 collapsed and the caster angle could not be adjusted very much. Further, there was a second embodiment of Japanese Utility Model Application No. 57-141856 (body frame for motorcycles and the like). However, when braking was also performed suddenly, the steering stem-2 and the main pipe-3 collided, and this was all that was necessary. The caster angle stops. It is a device that cannot adjust the caster angle. (Problems to be solved by the present invention) Please see FIGS. 2, 3 and 4 of the present invention.
The caster angle of the front fork can be freely changed by passing the thick bolt (1) and two nuts, and the top, bottom, left and right can be locked and adjusted with a tight fit and the bolt (3). This makes it easy to change to American or Chopper and easily return to normal. In particular, it is possible to set a setting where the handling becomes lighter when the front fork is set up, and the handling becomes heavy when the front fork is knocked down. Like a two-wheeled motorcycle, the handling becomes heavy when the front fork is knocked down like an American or a chopper. In such a case, move the front fork mounting position closer to the stem hole. This alone makes handling lighter and easier to ride. On the other hand, if it is not easy, move the front fork mounting position away. Handling is stable by itself. The same theory is that most bicycle front forks are bent. (Means for Solving the Problems) As shown in Fig. 9 of the present invention, the mounting of the stem hole part (6) is locked by tightening the bolts (3) on the upper, lower, left and right sides, and the caster angle is adjusted steplessly. Fix firmly. If the caster angle is raised, handling becomes lighter, and if the caster angle is lowered, handling becomes heavy. Also, since the caster angle can be changed as much as possible, it is ideal for changing to American or chopper. And you can easily return to normal by loosening the bolt. Tighten and adjust the front fork position from the stem hole up and down and left and right with the bolt (9) and nut (10),
The stability increases as the distance increases, and the stability decreases as the distance increases. You can adjust the front fork attachment position from the caster angle and stem hole, respectively, and you can run with your favorite handling. (Operation) In the present invention, as shown in FIG. 1, the caster angle (16) is freely adjusted, and the lightness and weight of the handling can be changed as desired by the rider. It can be easily changed to American or chopper and can be easily restored. Moving the front fork away from the stem hole increases the stability, and moving it closer makes it more stable until it becomes unstable. Especially when using an American or a chopper, the handling becomes heavy. Therefore, when the front fork mounting position is close to the stem hole parts, the optimum handling is achieved. (Example) FIG. 1 is an overall view showing changing a caster angle (16). FIG. 2 shows a part (6) constituting a stem hole being attached to a frame (15) through a bolt (1). FIG. 3 is a diagram showing a configuration in which the stem hole component (6) is tightened and locked with the bolt (3) and the nut (2). FIG. 4 shows a configuration in which the stem hole component (6) turns around the bolt (1), the front fork turns, and the caster angle (16) is changed. Of course, as shown in FIG. 3, tighten and lock with upper and lower left and right bolts (3) and nuts (2). FIG. 5 is a plan view when the stem hole component (6) is mounted across the frame (15), and FIG. 6 is a plan view when the frame (15) is mounted across the stem hole component (6). It is a diagram, and in practice, either may be configured. FIG. 7 shows the case where the stem hole part (6) is twisted with the bolt (3) and the nut (2), and FIG. 8 shows the case where the stem hole part is turned upside down, and the angle of the stem hole is adjusted steplessly. It has a configuration that can be used. Fig. 9 shows the position from the stem hole part (6) to the front fork attachment (13) with the bolt (9) and nut (10).
Fig. 10 is an elevational view of a mechanism that adjusts and locks the motorcycle to freely change the stability of the motorcycle. Eleventh
The figure is an elevational view when the mounting position of the front fork (14) is approached, and has the effect of reducing the handling that is too heavy. On the other hand, FIG. ,
This is a front fork mounting mechanism that has the effect of increasing stability and having the effect of setting the desired handling steplessly. FIG. 13 is a plan view showing the whole. (Effects of the invention) Until now, there were no commercial vehicles or racing machines that change the caster angle. In addition, there was no mechanism to adjust the position of the front fork from the stem hole. The present invention can freely adjust the caster angle and the mechanism for changing the mounting position of the front fork from the stem hole according to the rider's preference, and can also adjust the weight, lightness, and stability of handling. Machines that make the front fork extremely long, such as Americans and choppers, had to be welded by intuition and modified. However, with the present invention, the front fork can be knocked down as much as possible, and the handling characteristics can be set to the rider's preference. In other words, the tuning of motorcycle handling. Moreover, it is a mechanism that can be returned to normal immediately.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an elevational view of the overall view with the caster angle changed. FIG. 2 is a perspective view showing the connection between the frame (15) and the stem hole part (6). FIG. 4 is an elevation view in which the hole component (6) is fixed to the frame (15). FIG. 4 is an elevation view in which the caster angle (16) changes around the bolt (1). FIG. 6 is a plan view in which the stem hole component (6) is sandwiched by the frame (15). FIG. 7 is a plan view in which the stem hole component (6) is tilted. Fig. 8 is an elevational view when the angle of the stem hole part (6) is set up. Fig. 9 is a front fork installation from the stem hole (13).
Fig. 10 is an elevation view of adjusting the front fork attachment (13) to the stem hole part (6). Fig. 11 is an elevation view of the stem hole part (6) and the front fork attachment (13). FIG. 12 is an elevation view in which the stem hole component (6) and the front fork attachment (13) are separated. FIG. 13 is a plan view of the overall view of the present invention. 1. Bolts 2. Lock nuts …… bolt, 4
... Lock nut, 5 ... Split pin 6 ... Stem hole part, 7 ... Washer, 9 ... Bolt, 10 ... Lock bolt, 11 ... Lock bolt, 12 ... Split pin, 13 ... Front fork Mounting, 14 ... front fork, 15
…… Frame, 16 …… Caster angle

Claims (1)

(57) [Rules for requesting registration of utility model] A stem hole part (6) is attached to a front upper end of a frame (15) of a bicycle, a motorcycle or the like with a bolt (1) and a nut, and a front fork (14) is attached to the stem hole part (6). When installing (6),
The stem hole component (6) is positioned from the left and right with bolts (3) and lock nuts (2) provided at the left, right, up and down positions near the mounting position of the stem hole component of the frame (15), and the front fork ( 14) A caster angle adjustable front fork characterized by adjusting the caster angle.