JPS5970276A - Steering gear for handle of motorcycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION In the conventional steering wheel steering device for a motorcycle NK, a large number of rolling elements such as rolling bearing f-balls and rollers, which pivotally support the steering wheel swing shaft, are interposed.

For this reason, the critical swing angle of the rolling bearing becomes small, 1
As the rolling elements move on the contact surfaces of the outer ring and the inner ring, the indentations created on the contact surfaces are 1 indentation and 1 indentation of the adjacent rolling elements.
When the overlapping portion 2 and the rolling force 5 are transferred, the swing resistance of the handle swing shaft may change in stages.

The present invention relates to the improvement of a steering wheel steering device for an automatic two-distortion system that does not cause such problems, and the object thereof is to provide a steering wheel steering device f that allows the steering wheel to have a constant steering feel and can steer the steering wheel over a large distance. It is in the point of providing.

An embodiment of the present invention illustrated in the drawings of FIGS. 1 to 4 will be described below.

Reference numeral 1 denotes a motorcycle frame, and the frame 1 includes a head vibe 2, a main/guidance 3, a down tube 4, a back stay 5, and a track rail 6, which are integrally connected to each other.

In addition, the outer ring 8 of an angular contact ball bearing 7 is fitted to the upper and lower ends of the head vibrator 2, and the handle swing shaft 12, which is a steering shaft, is fitted to the inner part of the bearing 7. A bottom frishi 16 is fitted onto the lower end of the moving shaft 12, and a nut 13 is screwed onto the upper part of the handle swing shaft 12. By tightening the nut 13, a pair of upper and lower angular balls are fitted. The outer ring 8 of the bearing 7 is press-fitted to the upper and lower ends of the head vibrator 2, and the inner ring 9 of the pair of upper and lower angular ball bearings 7 is fixed to the handle swing shaft J2.

Further, the top bridge 15 is fitted to the upper end of the handle swing shaft 12, and the top bridge 15 is fixed to the upper end of the handle swing angle 12 by tightening the nut 17, and the front fork 14 is connected to the top bridge 15 and the bottom The front fork 14 is integrally fixed to the bridge 16 in advance, and the front fork 14 can be swung within a predetermined angle α of 50° or more, for example, within 400° on each side, around the handlebar swing axis 12 by a stopper mechanism (not shown). It has become.

Furthermore, the base ends of a pair of left and right handle pipes 18 are integrally attached to the top bridge 15, a handle grip 19 is fitted to the tip of the handle pipe J8, and a suspension unit 20E is attached to the front fork 14.
A front wheel 2J is rotatably attached therebetween.

Therefore, a retainer 11 is interposed between the outer ring 8 and the inner ring 9 of the angular contact ball bearing 7 to prevent the balls 10 (14 or less) from coming into contact with each other at equal intervals.

Also, the inner diameter of the groove contact surface of the outer ring 8 is 5, the outer diameter of the groove contact surface of the inner ring 9 is D2, the average diameter is 1) -5'', the outer diameter of the ball 10 is d1, the number of balls 10 is n1 balls 10 If the contact angle that is the angle between the contact points of the inner and outer rings 8 and 9 and the plane perpendicular to the axis of the bearing 7 is β, then the critical swing angle θC1
The critical swing angle θC is Qkm/h for a motorcycle.
The above values D1, D2, D, d- are set so that the following relationship is established: θC〉α ...... (2) for the steering wheel normal swing angle α that can be steered in the above driving. %
n1β is set.

Specifically, D = 36mm5 d = 7.0 m
If m-, n = 14, β = 45°, then θ = 59.50 from equation (1), and if the set angle α is 50°, then equation (2) is satisfied. can.

Also, D == 42 g, d"=' 9 its n
:14, if β=45°, then θ. = 59.4°, which satisfies Equation 1 and (2).

The embodiment shown in FIGS. 1 to 4 has a V
With this configuration, when the handle grip 19 is gripped and swung left and right, the handle swing shaft 12 swings left and right with respect to the head vibrator 2 through the entire angular ball bearing 7.
It is swung left and right within 25 degrees, and the center of the oscillation coincides with the center of the head pipe 2 and the nozzle swing WJJ axis 12.

In this case, the handle swing shaft 12 swings within the critical swing angle θ (-) of the angular ball bearing 7, so even if the angular ball bearing 7 wears out, one ball 10 will move between the outer M8 and the inner ring 9. The indentation force S1 transferred on the groove contact surface of the ball 10 does not overlap at all with the indentation of the adjacent ball 10,
The swinging resistance of the handle does not change, and the handle can be operated smoothly.

In addition, since the balls 10 are held by the retainer 11, the balls 10 will not be lost during assembly or disassembly.
Assembly and disassembly work 2 can be carried out efficiently and easily.

Furthermore, the balls 10 are held between an inner ring 8 and an outer ring 9 having circularly curved grooves and are held at equal intervals by a retainer 11, and since adjacent balls 0 do not come into frictional contact with each other, there is resistance to the swinging of the handle swing shaft 2. The resistance is small and there is no resistance change due to contact between the balls.

In the embodiment illustrated in FIGS. 1-4, the retainer 11
was formed by providing holes equidistantly in the circumferential direction in a conical ring, but as shown in Fig. Drill a hole in the ring, bend the inner circumference of the ring upward to convex vCC, place it on the outer ring 8,
After fitting the ball 10 into the hole of the ring and placing the inner #i9 thereon, the outer periphery of the ring may be bent toward the center or the retainer 11 may be used.

In the present invention, in the steering wheel steering device for a motorcycle that uses an angular bearing to oscillate and steer a handlebar oscillating axis within 50 degrees, the angular angular bearing is an angular ball bearing with a retainer, and the critical oscillation of the ball bearing is Since the angle is made larger than the steering angle of the steering wheel swing shaft, when the steering wheel is steered within the normal steering angle, the ball indentation 2 on the contact surface of the inner and outer race grooves of the angular contact ball bearing.
They can be separated and prevented from overlapping each other, eliminating the influence of resistance changes caused by marks on the ball [1:, and removing the influence of resistance changes caused by marks on the handle. ! IJ it! It is possible to maintain a constant steering feel.

[Brief explanation of drawings]

FIG. 1 is a side view of a motorcycle fully equipped with an embodiment of the steering wheel steering device according to the present invention, and FIG.
31'A is an enlarged longitudinal sectional view of the main part, FIG. 4 is a plan view of FIG. 3 with the inner ring removed, and FIG. 5 is a diagram of another embodiment. FIG. 1... Motorcycle frame, 2... Head pipe,
3... Main vibe, 4... Down tube, 5...
... Backstay, 6... Seat rail, 7 degree angular contact ball bearing, 8... Outer ring, 9... Inner ring, 10...
・Ball, 11... Retainer, 12... Handle swing shaft, 13... Nut, 14... Front leaf, 15... Top bridge, 16... Bottom bridge, 17...・Natsuto, 18...Hasodoru Vibe, 1
9...Handle grip, 20...Suspension unit, 21...Payment wheel. Agent Patent attorney Nozomi Ehara 1-person procedural amendment February 16, 1980 Patent Office Commissioner Kazu Wakasugi Failure 1, case indication 1982 Special d↑ Application No. 180502 No. 2, title of invention Motorcycle steering wheel Apparatus 3, Person making the amendment Relationship with the case Patent applicant 4, Attorney 6, Number of inventions increased by the amendment None As shown in the attached sheet, original drawing A No. 21 of Controlled Blood Output I! ,'q is class 1・I
I"J iff+ is replaced by IC. 2nd p 2 421- /13 9 8 ≧ / ゝ10

Claims (1)

[Claims] In a steering wheel steering device for a two-wheeled motorcycle in which a steering wheel swing shaft can be oscillatedly steered using an angular bearing, the critical swing angle of the angular bearing is set to 2500 or more, and the angular bearing is an angular ball bearing with a retainer. A motorcycle steering device characterized by: