JP2010018261A - Attitude stabilization device for bicycle when loaded - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an attitude stabilization device for a bicycle capable of attaining stabilization of a vehicle body even in such a state that a baggage or the like is loaded on a rear part of the bicycle while ensuring operation stability. <P>SOLUTION: The attitude stabilization device at loading for the bicycle has a fulcrum provided near a bottom bracket and a pair of left and right swing arms turnably pivotally supported on the fulcrum. The swing arm turnably pivotally supports an auxiliary wheel at the other end, a lower end of a link rod is turnably arranged on the swing arm, and an upper end of the link rod has a structure that it is continuously contacted with a baggage base above a rear wheel. A front end of the baggage base is made to a structure that it is turnably mounted to a bearing arranged on an upper part of a seat stay in a vertical direction and in a left/right direction to solve a problem. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bicycle loading posture stabilization device.

  Since two-wheeled bicycles are unstable due to their structural characteristics, three-wheeled bicycles with one front wheel and two rear wheels are widely used to stabilize the bicycle.

  In order to prevent the bicycle from toppling, a structure in which L-shaped arms are attached to the left and right of the rear wheel shaft and an auxiliary wheel is pivotally supported at the tip of the horizontal portion of the L-shaped arm is widely adopted for children's bicycles. ing.

  The prior art described above has the following problems.

  When trying to turn a three-wheeled bicycle with one front wheel and two rear wheels, it is difficult to turn because the vehicle body does not tilt like a two-wheeled bicycle. Therefore, a swing mechanism is provided that allows the rear frame that supports the rear two wheels to swing left and right relative to the front frame that supports the front wheel and the seat, and the front frame can be tilted. However, for those who are unaccustomed to driving a tricycle or who are inferior in physical strength, it is difficult to move the center of gravity by the trunk, which may cause instability.

  Further, since the rear two wheels are fixed at a coaxial parallel position, a difference in rotation occurs between the left and right rear wheels when turning, which deteriorates steering stability.

  The auxiliary wheel structure using the L-shaped arm described above prevents the vehicle body from overturning, but prevents the vehicle body from tilting when turning, making it difficult to drive.

  In order to solve the above problem, for example, as shown in Japanese Utility Model Laid-Open No. 07-006058, a horizontal shaft having an auxiliary wheel pivotally supported at one end and a bicycle rear wheel locked at the other end of the horizontal shaft are provided. A structure composed of a hydraulic cylinder and a variable angle between the mounting shaft and the mounting shaft is employed.

  However, in the above device, although the auxiliary wheel does not interfere when the vehicle body is tilted, the auxiliary wheel moves on the circumference around the connecting part of the horizontal shaft and the rear wheel mounting shaft. The distance between the auxiliary wheel and the rear wheel changes significantly. This tread change has caused a problem that friction between the auxiliary wheel and the road surface is generated, and the behavior of the vehicle body becomes unstable.

In view of the above-described problems of the prior art, the present invention provides a posture stabilization device capable of stabilizing a vehicle body even in a state in which luggage or the like is loaded on the rear part of a bicycle while ensuring steering stability. It is for the purpose.
Japanese Utility Model Publication No. 07-006058

  In the bicycle loading posture stabilization apparatus according to the present invention, the bicycle has a fulcrum provided near the bottom bracket and a pair of left and right swing arms pivotally supported by the fulcrum, and the swing arm has an auxiliary wheel at the other end. The lower end of the link rod is rotatably arranged on the swing arm, and the upper end of the link rod has a structure connected to the loading platform above the rear wheel. The problem has been solved by adopting a structure in which the front end of the loading platform is attached to a bearing disposed at the upper part of the seat stay so as to be rotatable in the vertical and horizontal directions.

  The operation of the above problem solving means is as follows. That is, when the cargo is loaded on the loading platform, the weight of the load is mainly supported by the left and right auxiliary wheels, and the loading platform is pushed back by the link rod in the opposite direction to the tilting side of the vehicle body when the vehicle body tilts. Further, it is possible to suppress the influence on the vehicle body such as a wobble that becomes a problem due to the upward movement of the center of gravity caused by loading the cargo, and it is possible to stabilize the vehicle body.

  In addition, since the structure is as described above, the ground contact force to the road surface of the auxiliary wheel changes according to the weight of the load. That is, the grounding force of the auxiliary wheel is weak when there is no load, and the grounding force of the auxiliary wheel is strong when a heavy object is loaded. For this reason, when no load is required when the load supporting capacity is not required by the auxiliary wheel, a driving feeling similar to that of a two-wheeled bicycle without the auxiliary wheel can be obtained. Stability can be obtained.

  By the way, on a road surface with a level difference, when either one of the auxiliary wheels is significantly higher or lower than the other auxiliary wheels and the rear wheel, only the loading platform inclines and becomes unstable in the above structure. This is prevented by arranging a stopper for regulating the stroke of the auxiliary wheel between the swing arm and the vehicle body.

  In addition, since the auxiliary wheel moves up and down with respect to the rear wheel during turning, it does not hinder the inclination of the vehicle body, and the auxiliary wheel moves vertically in parallel with the rear wheel, so there is little tread change. Stable maneuverability can be obtained.

  As described above, the bicycle loading posture stabilization device of the present invention can achieve both high handling stability and stability of the vehicle body when cargo is loaded.

  Hereinafter, embodiments of the present invention will be described with reference to a structural diagram of a bicycle loading posture stabilization apparatus.

  In the bicycle loading posture stabilization apparatus according to the present invention, a bearing fulcrum 3 is fixed below the chain stay 2 near the bottom bracket 1, and the front ends of a pair of left and right swing arms 4 are provided at both ends of the bearing fulcrum 3. The swing arm 4 is pivotally attached so that the swing arm 4 can be independently rotated. Each swing arm 4 pivotally supports the auxiliary wheel 5 at the other end.

  A stay 6 is fixed to an upper portion near the rear end of the swing arm 4, and a rod end 7 is attached to the stay 6. The rod end 7 is disposed at the lower end of the link rod 8, and the rod end 9 is similarly disposed at the upper end of the link rod 8. The rod end 9 is attached to a stay 12 fixed to the rear lower part of the loading platform 11 disposed above the rear wheel 10.

  A rod 13 is fixed to the front front end of the loading platform 11 so as to face forward. Two stays 15 are fixed to the left and right upper portions of the seat stay 14, and a cylindrical bearing 16 is disposed between the stays 15 and is pivotally supported. A bearing 17 is fixed at an intermediate portion of the bearing 16 in a direction orthogonal to the bearing 16. The rod 17 is inserted into the bearing 17, and the front end of the rod 13 is inserted into the bearing 17 and is pivotally mounted.

  A stay 18 is fixed to the upper portion of the swing arm 4 in the vicinity of the rear end, and a lower end of a stopper 19 is attached to the stay 18. The upper end of the stopper 19 is attached to the stay 15.

  The present invention solves the problem by adopting the above-described configuration.

It is a side view which shows the attitude | position stabilization apparatus at the time of the bicycle loading in this invention. It is a rear view which shows the attitude | position stabilization apparatus at the time of the bicycle loading in this invention. FIG. 3 is a structural diagram of a load carrier front bearing portion of the bicycle loading posture stabilizing device according to the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Bottom bracket 2 Chain stay 3 Bearing fulcrum 4 Swing arm 5 Auxiliary wheel 6 Stay 7 Rod end 8 Link rod 9 Rod end 10 Rear wheel 11 Loading platform 12 Stay 13 Rod 14 Seat stay 15 Stay 16 Bearing 17 Bearing 18 Stay 19 Stopper 19

Claims (2)

    A fulcrum provided near the bottom bracket and a pair of left and right swing arms pivotally supported by the fulcrum, each swing arm pivotally supporting an auxiliary wheel at the other end; A lower end of the link rod is rotatably arranged on the swing arm, and the upper end of the link rod is connected to a loading platform above the rear wheel, and the front end of the loading platform is a bearing disposed on the upper portion of the seat stay. A posture stabilization device for loading a bicycle having a structure that can be pivoted vertically and horizontally.     2. A bicycle loading posture stabilization device according to claim 1, wherein a stopper for regulating the stroke of the swing arm is added between the swing arm and the bicycle frame.

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