JP2010163147A - Loading time attitude stabilizing device for bicycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an attitude stabilizing device for a bicycle capable of stabilizing a vehicle body even in a state of loading a cargo in a rear part of the bicycle, while securing maneuvering stability. <P>SOLUTION: This loading time attitude stabilizing device has a fulcrum arranged in the vicinity of a bottom bracket and a pair of right-left swing arms rotatably journaled by the fulcrum; the swing arms rotatably journal an auxiliary wheel to the other end; the ring rod lower end is rotatably arranged in the swing arms; the ring rod upper end has a structure of continuously connected to a loading space of a rear wheel upper part; and the loading space front end is formed as a structure being rotatably installed in the vertical and lateral direction in a bearing arranged in a seat stay upper part, and the problem is solved thereby. <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 with the inclination of the vehicle body, the auxiliary wheel moves on the circumference around the connecting portion 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.

SUMMARY OF THE INVENTION 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 device according to the present invention, the bicycle has a fulcrum provided below 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 providing a bump stopper between the swing arm and the vehicle body for regulating the stroke of the auxiliary wheel.

  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.

  FIG. 1 is a side view showing a bicycle loading posture stabilization apparatus according to the present invention. FIG. 2 is a rear view of the bicycle loading posture stabilizing apparatus according to the first aspect of the present invention.

  In the bicycle loading posture stabilizing device according to the present invention, a bearing pedestal 3 is fixedly provided below the chain stay 2 below the bottom bracket 1, and a pair of left and right bearings 4 are provided at both ends of the bearing fulcrum 4 provided on the bearing pedestal 3. The front end of the swing arm 5 is pivotally mounted so that the swing arm 5 rotates independently. Each swing arm 5 pivotally supports the auxiliary wheel 6 at the other end.

  A stay 7 is fixed to the upper part near the rear end of the swing arm 5, and a rod end 8 is attached to the stay 7. The rod end 8 is disposed at the lower end of the link rod 9, and the rod end 10 is similarly disposed at the upper end of the link rod 9. The rod end 10 is attached to a stay 13 fixed to the rear lower part of the loading platform 12 disposed above the rear wheel 11.

  FIG. 3 is a structural view of the front bearing portion of the loading platform of the bicycle loading posture stabilizing device according to the first aspect of the present invention.

  A rod 14 is fixed to the front front end of the loading platform 12 so as to be directed forward. Two stays 16 are fixed to the left and right upper portions of the seat stay 15, and a cylindrical bearing 17 is disposed between the stays 16 and is pivotally supported. A bearing 18 is fixed to an intermediate portion of the bearing 17 in a direction orthogonal to the bearing 17. The rod 18 is inserted into the bearing 18, and the front end of the rod 14 is inserted into the bearing 18 and pivotally attached thereto.

  A bump stopper 19 is disposed below the chain stay 2. The swing arm 5 is provided with a contact plate 20 at a position corresponding to the bump stopper 19. Thereby, the stroke of the swing arm 5 is regulated.

  FIG. 4 is a side view showing a bicycle loading posture stabilization apparatus according to claim 2. FIG. 5 is a perspective view showing a stabilizer 21 connected to the left and right swing arms 4 according to claim 2.

  An intermediate portion of the stabilizer 21 is rotatably supported on the bearing pedestal 3 by a bracket 22.

  Further, both ends of the stabilizer 21 are connected to the left and right swing arms 5 via a stabilizer link 23 made of a spherical bearing.

  As a result, the spring reaction force of the stabilizer 21 acts on the swing arm 5 to increase the roll rigidity of the left and right swing arms 5 during turning, thereby improving the stability of the vehicle body.

  FIG. 6 is a side view showing a bicycle loading posture stabilizing device having a loading platform and auxiliary wheel partial flip-up structure according to claim 3.

  A stay 24 is fixed in the vicinity of an intermediate portion of the seat stay 15, and a lower end of a gas spring 25 as an extension spring means is attached to the stay 24. The upper end of the gas spring 25 is attached to a stay 26 provided on the side of the loading platform 12. In a so-called empty state in which no load is applied to the platform 12, the auxiliary wheel 6 and the platform 12 structure are flipped upward by the repulsive force of the gas spring 25 as shown in FIG. 7. As a result, the auxiliary wheel 6 can be separated from the road surface and the rotational resistance with the road surface can be reduced when the stability of the vehicle body is unnecessary, such as when the driver is traveling alone.

  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. It is a side view which shows the attitude | position stabilization apparatus at the time of the loading of bicycles of Claim 2. It is a perspective view which shows the stabilizer part in the attitude | position stabilizer at the time of the loading of bicycles of Claim 2. It is a side view which shows the attitude | position stabilizer at the time of the loading of bicycles of Claim 3. It is a side view which shows the loading platform part raising state in the attitude | position stabilizer at the time of the loading of bicycles of Claim 3. It is a rear view which shows the posture stabilization apparatus at the time of the loading of bicycles of Claim 3.

DESCRIPTION OF SYMBOLS 1 Bottom bracket 2 Chain stay 3 Bearing base 4 Bearing fulcrum 5 Swing arm 6 Auxiliary wheel 7 Stay 8 Rod end 9 Link rod 10 Rod end 11 Rear wheel 12 Carriage 13 Stay 14 Rod 15 Seat stay 16 Stay 17 Bearing 18 Bearing 19 Bump stopper 20 Stopper plate 21 Stabilizer 22 Bracket 23 Stabil link 24 Stay 25 Gas spring 26 Stay

Claims (3)

    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.     The bicycle loading posture stabilization apparatus according to claim 1, wherein a stabilizer is connected to the left and right swing arms.     2. The posture stabilization apparatus for loading bicycle according to claim 1, wherein an extension spring means is disposed between the bicycle frame and the loading platform above the rear wheel, and the loading platform and the auxiliary wheel part jump upward in an unloaded condition. .

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