WO1990010569A1 - Bequille de moto retractible automatiquement - Google Patents

Bequille de moto retractible automatiquement Download PDF

Info

Publication number
WO1990010569A1
WO1990010569A1 PCT/US1990/001314 US9001314W WO9010569A1 WO 1990010569 A1 WO1990010569 A1 WO 1990010569A1 US 9001314 W US9001314 W US 9001314W WO 9010569 A1 WO9010569 A1 WO 9010569A1
Authority
WO
WIPO (PCT)
Prior art keywords
arm
motorcycle
kickstand
fully
spring
Prior art date
Application number
PCT/US1990/001314
Other languages
English (en)
Inventor
William M. Otto
Edmund R. Cababa
Original Assignee
Otto William M
Cababa Edmund R
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Otto William M, Cababa Edmund R filed Critical Otto William M
Publication of WO1990010569A1 publication Critical patent/WO1990010569A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62H—CYCLE STANDS; SUPPORTS OR HOLDERS FOR PARKING OR STORING CYCLES; APPLIANCES PREVENTING OR INDICATING UNAUTHORIZED USE OR THEFT OF CYCLES; LOCKS INTEGRAL WITH CYCLES; DEVICES FOR LEARNING TO RIDE CYCLES
    • B62H1/00—Supports or stands forming part of or attached to cycles
    • B62H1/02—Articulated stands, e.g. in the shape of hinged arms

Definitions

  • This invention relates to a motorcycle kickstand, and more particularly to a motorcycle kickstand that automatically partially retracts upon start of motion of the motorcycle.
  • a motorcycle kickstand mounted on one side of the frame of the motorcycle that allows the motorcycle to be left in a standing position when the motorcycle is parked by the rider.
  • a motorcycle kickstand also referred to as a "side stand” supports the motorcycle in a slightly leaning position.
  • Many such motorcycle kickstands include a spring having one of its ends attached to the frame of the motorcycle and its other end attached to the pivotal arm of the kickstand. The spring is attached so as to urge the pivotal arm towards one of two positions, either a fully-extended position in which the pivotal arm is capable of supporting the weight of the motorcycle or a fully-retracted position in which the pivotal arm rests during operation of the motorcycle.
  • the rider Prior to riding the motorcycle, the rider must first raise the parked motorcycle from its tilted position to an upright position, then manually move the kickstand, usually with his or her foot, allowing the kickstand to travel to its fully-retracted position.
  • the extended kickstand does not interfere with the operation of the motorcycle when the rider is riding straight ahead and the motorcycle is in a perfectly vertical, or upright, position.
  • the extended kickstand may make contact with the ground, depending upon the amount of lean that the turn requires.
  • kickstands are almost universally attached on the left-hand side of the motorcycle, only left-hand turns will be affected.
  • this invention in one aspect provides a motorcycle kickstand with a fixed mounting bracket, a pivotal arm and a spring connected to both the mounting bracket and the arm which urges the pivotal arm towards its fully-retracted position regardless of the position of the arm.
  • the spring urges the kickstand arm towards its fully-retracted position.
  • the kickstand will be automatically moved either to its fully-retracted position or to a position intermediate its fully-extended position and its fully-retracted position. In case the kickstand is partly retracted, it will be pointed in a backwards direction with respect to the motorcycle and will retract further upon any subsequent contact with the road during a turn, regardless of the coefficient of friction.
  • the kickstand of the invention incorporates a bolt about which the kickstand arm pivots, the bolt having an extension which abuts the spring causing the spring tension to be increased as the arm is moved towards its fully-extended position.
  • the bolt provides a very beneficial retrofit capability so that conventional kickstands can be modified in accordance with the invention.
  • This invention thus provides a motorcycle kickstand, having a pivoted support arm for attachment to the motorcycle, the arm being pivotable from the fully-extended position to the fully-retracted position.
  • Resilient means urge the pivot arm from the fully-extended position to the fully-retracted position.
  • Force increasing means are provided for increasing the force urging the pivot arm from its fully-extended position to its fully-retracted position when the pivot arm is pivoted past a predetermined position.
  • this predetermined position is a position intermediate the fully-extended position and the fully-retracted position, such that the pivot arm remains in the intermediate position until urged from that position by an additional force.
  • FIG. 1 is a front view of a motorcycle in its parked position
  • Fig. 2 is a perspective view of a kickstand in accordance with the invention attached to the frame of a motorcycle;
  • Fig. 3A is a perspective view of the kickstand of Fig. 2 in a first, extended position
  • Fig. 3B is a perspective view of the kickstand of Fig. 2 in a second, retracted position
  • Fig. 4A is an illustration of a portion of the kickstand of Fig. 2 when the kickstand is in its fully- retracted position;
  • Fig. 4B is an illustration of a portion of the kickstand of Fig. 2 when the kickstand is in a position intermediate its fully-extended position and its fully- retracted position; and Fig. 4C is an illustration of a portion of the kickstand of Fig. 2 when the kickstand is in its fully- extended position.
  • a motorcycle kickstand 10 in accordance with the invention is illustrated in the figures.
  • the kickstand also known as a "side stand,” is attached to the left side of a motorcycle as shown in Fig. 2.
  • side stand is attached to the left side of a motorcycle as shown in Fig. 2.
  • the kickstand 10 has a mounting plate 12 which is attached to the frame 14 of the motorcycle by conventional means such as welding, or possibly by fasteners such as bolts. The remaining elements of the kickstand 10 are attached to the mounting plate 12.
  • these elements include a clevis 16, or U-shaped metal shackle, a pivotal arm 18 rigidly connected to the clevis 16, and a pivot bolt 20 which pivotally connects the clevis 16 to the mounting plate 12.
  • the arm 18 includes a foot 22 at its lower end, a metal eyelet 24 connected to the arm 18 between the foot 22 and the clevis 16.
  • An L-shaped member 25 is connected to the arm 18 adjacent the foot 22, with the short portion of the member 25 projecting outward, away from the motorcycle.
  • a cylindrical spring anchor 28 is connected to the mounting plate 12 above and slightly forward of the pivot bolt 20 (Fig. 4A) .
  • One end of a spring 26 is attached through the hole in the eyelet 24, with the other end of the spring 26 being attached to the anchor 28.
  • the bottom portion of the mounting plate 12 has an angled stop 30 (Fig. 3B) that abuts against the clevis 16 to limit the clockwise rotation of the kickstand arm 18.
  • the stop 30 limits the motion of the kickstand 18 and ensures that the arm 18 angles slightly forward when the motorcycle is in its parked position.
  • the counterclockwise rotation of the arm 18 is limited by a stop 32 on the upper portion of the mounting plate 12 or on the frame of the motorcycle.
  • the stop 32 is illustrated as comprising a horizontally oriented offset located above the pivot bolt 20, and below the spring anchor 28.
  • the stop 32 is positioned such that the clevis 16 hits the stop 32 to limit the counterclockwise motion of the kickstand arm 18 as shown in Fig. 3B.
  • the pivoting of the arm 18 is controlled by the interaction of the spring 26 and a protrusion which may take the form of a cylindrical metal extension 34 of the pivot bolt 20 that is coaxial with the pivot bolt 20.
  • a protrusion which may take the form of a cylindrical metal extension 34 of the pivot bolt 20 that is coaxial with the pivot bolt 20.
  • a portion of the kickstand 10 is shown with its arm 18 in the fully-retracted position which, for purposes of this description, means the position that a kickstand normally occupies when the motorcycle to which it is attached is being ridden.
  • the pivot bolt 20 and its extension 34 are located between the spring anchor 28 and eyelet 24 on the horizontal axis, and slightly below the horizontal level of the eyelet 24.
  • the length through which the spring 10 is stretched when the kickstand is in the retracted position is shown as LR.
  • This length LR is the shortest length through which the spring 26 is stretched in any position of the kickstand.
  • the force exerted by the spring 26 in this fully-retracted position is offset from, or eccentric to, the pivot 20 so as to create a counterclockwise torque about the pivot 20 which urges the kickstand arm 18 to remain in its fully- retracted position.
  • Fig. 4B illustrates the kickstand arm 18 in a position intermediate its fully-retracted position and its fully- extended position.
  • the spring anchor 28, the pivot bolt 20 and the eyelet 24 are positioned along a straight line, and the spring 26 is stretched along this straight line by an amount Lj. Since the distance between the spring anchor 28 and the eyelet 24 is larger when the arm 18 is in this intermediate position than the corresponding distance when the arm is in its fully- retracted position, Lj is larger than LR, SO that an additional force is exerted by the spring 26. In this intermediate position, however, the force exerted by the spring 26 is along the length of the arm 18 such that no rotational moment is exerted on the kickstand 10 by the spring 26. Thus, if released in this position, the kickstand 10 would remain in this intermediate position.
  • Fig. 4C illustrates the kickstand 10 in its fully- extended position which is the position that the arm 18 occupies when it is supporting the motorcycle in a parked, slightly leaning position, as shown in Figs. 1 and 2.
  • the foot portion 22 of kickstand arm 18 is angled slightly towards the front of the motorcycle, with the arm 18 being positioned ahead of an imaginary vertical line drawn through the center of the pivot bolt 20, as best seen in Figure 4C.
  • a stem portion 36 of spring 38 is relatively stiff and inflexible compared to a coiled portion 38 of the spring 26.
  • the stem portion 36 is in contact with the cylindrical extension 34 of the pivot bolt 20, and the spring 26 is thereby prevented from occupying a position along a straight line path from the eyelet 24 to the anchor bolt 28.
  • the protrusion, or extension 34 acts as a movement limiting element to prevent the intermediate portion of the spring 26 from moving "over-center,” or past the pivot bolt
  • the spring 26 is stretched to a length of L*g, which includes a straight-line portion and a curved portion as shown in Fig. 4C.
  • L*g which includes a straight-line portion and a curved portion as shown in Fig. 4C.
  • the uppermost part of the coil portion 38 of the spring 26 is curved, or angularly deflected.
  • L-g is greater than Lj and the tension on the spring 26 is further increased compared with the spring tension in the intermediate position of Fig. 4B.
  • the cylindrical extension 34 acts as a tension-increasing element which increases the force exerted by the spring 26.
  • the stem portion 36 of the spring 26 also acts as a leaf spring to exert an additional force on the arm 28.
  • the contact of the spring stem portion 36 on the extension 34 prevents the spring from going "over-center” and pulling clockwise on the arm 18. Instead, the force in the stretched spring 26 and the force in the spring stem 38 are directed to create a counterclockwise rotational movement on the arm 18.
  • the extension 34 and spring 26 thus act to provide not only an increase in the spring force, but to exert a counterclockwise torque on the kickstand arm 18.
  • the rider In order to park a motorcycle using the kickstand 10 shown in the drawings, the rider first dismounts and then, while holding the motorcycle vertical, uses his or her foot to overcomes the force of the spring 26 and urge the kickstand arm 18 to its fully-extended position.
  • the foot 22 or the "L" shaped member 25 provide a means for the riders foot to readily engage and rotate the arm 18.
  • the rider then allows the motorcycle to tilt while holding the kickstand arm 18 in the fully-extended position until the foot 22 of the kickstand arm 18 contacts the ground. At this point, the weight of the motorcycle exerts a force on the arm 18 sufficient to prevent the spring 26 from retracting the arm 18 to the fully-retracted position.
  • the force of the spring 26 and the friction in the pivot 20, clevis 16 and mounting plate 12 are such that the position to which the arm 18 automatically retracts is an intermediate position between its fully-extended and fully-retracted positions, for example, the position shown in Fig. 4B.
  • the force generated by the spring passes through the center of the pivot 20 and thus produces no turning moment about the pivot 20. If the rider then forgets to fully retract the aim 18 prior to riding the motorcycle, the arm 18 will be forced upwards towards its fully-retracted position upon any subsequent contact with the road, for example, during a left turn, regardless of the coefficient of friction of the road. This occurs because the kickstand 10, as shown in Fig.
  • FIG. 4B points slightly toward the back of the motorcycle in contrast with a kickstand that has been inadvertently left in its fully- extended position in which it juts forward, as shown in Fig. 2.
  • a rearward or upward force exerted on the kickstand 10 from contact with the road will cause the arm 18 to move so the force exerted by the spring 26 is offset from the pivot 20 in a direction which urges the arm 18 into the fully- retracted position of Fig. 4A.
  • the arm automatically retracts to an intermediate, straight line position
  • the arm could be made to retract to a different position.
  • the extent to which the arm will automatically retract depends upon the strength of the spring 26 which is used, the coefficient of friction between the clevis 16 and the mounting plate 12, and the relative locations of the pivot bolt 20, eyelet 24, and the spring anchor 28.
  • the use of a large spring that generates a lot of force in combination with a very easily pivotable arm 18 would tend to cause the inertia of the pivoting arm to carry the arm past the straight line position shown in Fig. 4B and make the arm 18 completely retract to its fully- retracted position.
  • a stable position may be created at the centered location of the stand, with the kickstand 10 in a substantially vertical plane, or even at a slightly forward position, by adjusting the diameter at the cylindrical extension 34 in relation to the position of the anchor bolt 28 and the size of the spring stem 36.
  • This will avoid any problems encountered in the system in which the stand is positively sprung towards the fully-retracted position throughout the entire range of travel of arm 18. With this latter system, however, the rider must maintain foot contact with the kickstand until the motorcycle is in the fully-tilted position, which is sometimes awkward and can result in dropping the motorcycle.

Abstract

L'invention concerne une béquille se rétractant automatiquement partiellement à partir de sa position entièrement déployée lorsque la moto est placée en position droite à partir d'une position d'appui, afin que ladite béquille ne vienne pas au contact du sol lorsque l'on se sert de ladite moto, dans le cas où le motocycliste oublie de ramener la béquille à sa position rétractée avant de partir avec la moto. Ladite béquille utilise un ressort à boudin (38) relié à un support de montage (12) et à un bras de support (18) afin de pousser le bras jusqu'à une position entièrement rétractée. Le ressort vient également au contact d'un boulon de pivot (34) afin d'augmenter la tension du ressort lorsque ledit bras est déplacé jusqu'à sa position entièrement déployée.
PCT/US1990/001314 1989-03-09 1990-03-09 Bequille de moto retractible automatiquement WO1990010569A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US321,514 1981-11-16
US32151489A 1989-03-09 1989-03-09

Publications (1)

Publication Number Publication Date
WO1990010569A1 true WO1990010569A1 (fr) 1990-09-20

Family

ID=23250919

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1990/001314 WO1990010569A1 (fr) 1989-03-09 1990-03-09 Bequille de moto retractible automatiquement

Country Status (2)

Country Link
AU (1) AU5348990A (fr)
WO (1) WO1990010569A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5507200A (en) * 1994-12-20 1996-04-16 Custom Chrome, Inc. Combination motorcycle kickstand mechanism and transmission forward control unit
US6561467B1 (en) * 2000-09-15 2003-05-13 Amir Farsio Quick-release variable position slidable scooter jackstand
DE102008039423B4 (de) * 2008-08-23 2014-01-16 Jens Krause Parkvorrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1004061A (fr) * 1949-12-29 1952-03-25 Appui pour bicyclette
CH426524A (fr) * 1963-12-31 1966-12-15 App Control Equip Moteurs Cadre de bicyclette
US4084656A (en) * 1976-05-01 1978-04-18 Kawasaki Jukogyo Kabushiki Kaisha Motorcycle stand with safety switch
EP0023354A1 (fr) * 1979-07-27 1981-02-04 Siemens Aktiengesellschaft Détecteur pyroélectrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1004061A (fr) * 1949-12-29 1952-03-25 Appui pour bicyclette
CH426524A (fr) * 1963-12-31 1966-12-15 App Control Equip Moteurs Cadre de bicyclette
US4084656A (en) * 1976-05-01 1978-04-18 Kawasaki Jukogyo Kabushiki Kaisha Motorcycle stand with safety switch
EP0023354A1 (fr) * 1979-07-27 1981-02-04 Siemens Aktiengesellschaft Détecteur pyroélectrique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5507200A (en) * 1994-12-20 1996-04-16 Custom Chrome, Inc. Combination motorcycle kickstand mechanism and transmission forward control unit
US6561467B1 (en) * 2000-09-15 2003-05-13 Amir Farsio Quick-release variable position slidable scooter jackstand
DE102008039423B4 (de) * 2008-08-23 2014-01-16 Jens Krause Parkvorrichtung

Also Published As

Publication number Publication date
AU5348990A (en) 1990-10-09

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