JP2010042747A - Traveling stable bicycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a traveling stable bicycle improving a falling-down preventive function, serving as a three-person riding bicycle wherein two infants are put on front and rear sides, and having high safety, without impairing of airiness of a bicycle. <P>SOLUTION: A trailing arm type suspension device equipped with trailing arms 141 and struts 150 which are independent on right and left sides at a rear wheel portion is provided with auxiliary wheels RR. A rotating shaft of the trailing arm 141 is provided at a portion which is a lower portion of a chain stay 110, and on the outer and front side of an outer diameter line of a rear wheel tire in a side view. The trailing arm 141 is generally horizontally disposed. An upper portion of the strut 150 is mounted on the chain stay 110 and a rear fork 120, and a lower portion thereof is mounted on the trailing arm 141. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention is a two-wheeled vehicle in which an auxiliary wheel is provided on a trailing type suspension arm composed of left and right independent trailing arms and struts on the rear wheel, and the front-rear function has been improved without impairing the lightness of the two-wheeled vehicle. The present invention relates to a traveling safety two-wheeled vehicle (hereinafter referred to as “two-wheeled vehicle”) that is highly safe and can be used for a three-seater ride with two infants.

  Bicycles are lightweight, inexpensive and highly mobile, and are used for shopping and pick-up of kindergarten children by mothers, etc. However, the capacity of bicycles is based on the rules of the Prefectural Public Safety Commission based on the Road Traffic Law from the viewpoint of safety In addition to driving adults, one infant under the age of 6 is allowed on the infant seat. In Tokyo and other countries, it is also permitted to drive with one infant on the back, but if you violate the capacity, you are subject to fines or fees of 20,000 yen or less for violating the Road Code Act.

  However, in reality, many mothers often take three people for pick-up and shopping of kindergarten children, and it is necessary to allow up to two infants to ride together in order to support child rearing in a low birth rate society and for women to advance into society. As a result, the Tokyo Metropolitan Police Department has been examining the situation, and if the bicycle has a stable structure even if it rides three people, it will be considered to allow two people before and after the mother. The agency requests related organizations such as the Bicycle Industry Promotion Association to examine the possibility of spreading three-seater bicycles in terms of material, structure, and price. Development hastened.

The following Patent Document 1 includes auxiliary wheels arranged in parallel with the rear wheels on the left and right sides of the rear wheels. A right and left independent biasing means that is pivotally supported at the rear end of the ring arm and biases the trailing arm in a turning direction in which the auxiliary wheel moves downward, and left and right of the trailing arm. There is shown a bicycle that includes arm lock means for fixing the respective rotations, and the rotation of the trailing arm is fixed and the vertical movement of the auxiliary wheel is fixed by operation of the arm lock means.
JP 2007-145318 A

  However, the three-wheeled bicycle is heavy, has a complicated structure and is expensive, is not suitable for narrow roads such as urban areas, does not have the lightness of a two-wheeled vehicle, and requires a large parking space. There is a problem that it cannot be handled in a bicycle parking space.

  FIG. 10 is a side view of a two-wheeled vehicle with auxiliary wheels according to the conventional example described in Patent Document 1, and FIG. 11 is an enlarged perspective view of an auxiliary wheel part of the two-wheeled vehicle with auxiliary wheels described in FIG.

  As shown in FIGS. 10 and 11, the two-wheeled vehicle 500 with auxiliary wheels includes a movable large triangular frame 510, and a strut 550 is provided between the triangular frame 510 and the trailing arm 520. The trailing arm 520 is provided with a disk rotor 530, the triangular frame 510 is provided with a caliper 540, and the handle lever 560 is fixed with the rotation of the disk rotor 530, and an auxiliary wheel. A double engagement portion for fixing the vertical movement of the RR is provided.

  For this reason, the structure is complicated and expensive, and it is considered difficult to accurately fix and release the vertical movement of the auxiliary wheel to prevent falling without losing the timing with the handle lever 560. In order to enhance the fall prevention function by the auxiliary wheel, the front and rear positions of the auxiliary wheel RR are preferably arranged in front of the position of the rear wheel RW. However, since the triangular frame 510 is provided, the trailing wheel is provided. Since the length of the arm 520 is limited and short, it is considered difficult to dispose the auxiliary wheel RR in front of the rear wheel RW because the length of the trailing arm 520 is further shortened. Further, since the vertical position of the support shaft 560 of the trailing arm 520 is high, the front and rear inclination of the trailing arm is large, and the mounting position of the strut 550 is also close to the support shaft 560, so the load on the strut 550 increases and the strut 550 is large. It is possible to become.

  The present invention has been made as a result of diligent research and examination in view of such problems, and has a simple structure, enhances the fall prevention function without impairing the lightness of the two-wheeled vehicle, and allows two infants before and after. The purpose is to provide a highly safe two-wheeled vehicle that can be used for a three-seater ride.

  A first invention for achieving the above object is a two-wheeled vehicle in which an auxiliary wheel is provided in a trailing arm type suspension device provided with a left and right independent trailing arm and a strut in a rear wheel portion, and the trailing arm is rotated. The support shaft for supporting freely is the lower part of the chain stay, provided on the outer side of the outer diameter line of the rear wheel tire in the side view and on the front side, the trailing arm is disposed substantially horizontally, and the upper part of the strut is The motorcycle is characterized in that it is attached to the chain stay or the chain stay and the rear fork, and the lower part is attached to the trailing arm.

  The strut upper chain stay and the rear fork can be fixed by providing a reinforcing bracket and a small bracket for attaching the upper part of the strut to the bracket. You may make it attach an upper part.

  The auxiliary wheel tread (interval between the left and right sides) may be within the range of the outer end interval of the handlebars from the outer end interval of the conventional bicycle pedal.

  In a second aspect based on the first aspect, the left and right trailing arms are fixed to the rear end portion outside the rear end of the axle so that the axle for rotatably supporting the auxiliary wheel intersects in the left-right direction. A bracket for attaching the lower portion of the strut is attached to the outside, and an arm collar for rotatably supporting the trailing arm penetrates in the left-right direction at the front end of the trailing arm. A cylinder is fixed to the lower wall of the left and right chain stays directly or via a support member, and the diameter of the cylinder expands from the left and right ends toward the center. The support shaft is attached to the support shaft, and the support shaft is fixed to the cylinder at the maximum diameter portion located at the center in the left-right direction of the support shaft. The inner end of the arm collar is the end of the cylinder. Part Are assembled to diameter overlaps a motorcycle, characterized in that to ensure a large sliding dimension of the arm collar and small-diameter portion of the support shaft.

  The trailing arm's left and right outer width at the front end of the trailing arm is kept small so as not to interfere with the pedal when driving, ensuring the strength and rigidity of the trailing arm, especially the support shaft (arm collar), and the height of the trailing arm Secure.

  According to a third invention, in the first or second invention, the load rises at a wheel end of the auxiliary wheel in a range exceeding about 1/2 of the maximum upward stroke, and the upward total movement amount Is a motorcycle equivalent to a static fall limit angle equivalent amount, preferably slightly smaller.

  When the amount of upward movement of the auxiliary wheel is small, that is, when the tilt angle is small so that it does not fall, the spring constant is decreased so that the tilt necessary for two-wheeled driving is not constrained, and when the tilt angle is large, Upward load-Tall characteristics are raised nonlinearly to prevent overturning.

  The non-linear characteristic is not limited to that due to the close contact of the coil spring, and a non-linear characteristic may be obtained by providing a bumper rubber coaxially with the outer cylinder inside or outside the outer cylinder. Further, the auxiliary wheels may be prevented from rising and grounding when traveling straight (upright) so that the traveling resistance is reduced.

  According to a fourth aspect of the present invention, in the first or second aspect, the load-swarf characteristic at the wheel end of the auxiliary wheel is linear over substantially the entire range of the upward movement amount, and the total upward movement amount is static. This is a two-wheeled vehicle characterized in that it is equal to or greater than the equivalent amount of the falling limit angle.

  In contrast to the third aspect of the invention, the traveling is emphasized. Further, as in the third aspect of the invention, the auxiliary wheels may not be lifted and grounded during straight running (upright) running so that the running resistance is reduced.

  According to a fifth invention, in the third or fourth invention, the damping force characteristic at the wheel end of the auxiliary wheel is a linear type, and the upward damping force is larger than the downward damping force, preferably more than twice. It is a motorcycle characterized by being.

  The damping force characteristic is a linear type, so that the damping force does not peak when the vertical speed is large, and the upward damping force is increased relative to the downward damping force so that the damping force functions to prevent falling. .

  According to a sixth invention, in the first to fifth inventions, there is provided a stand with a hook or fork that extends outward in the left-right direction from a substantially central portion of the left and right stand arms and extends in a substantially J shape forward in a side view. When the two-wheeled vehicle is made to stand upright by the stand, the hook or fork pushes down the support rod or the axle of the auxiliary wheel that extends inward in the left-right direction at the rear end of the left and right trailing arms or the rear wheel. The two-wheeled vehicle is characterized in that the two wheels are fixed while the wheels and the auxiliary wheels are in a straight traveling state in contact with the ground, and the upward movement of the left and right auxiliary wheels is fixed, and the auxiliary wheels contribute to preventing the two-wheeled vehicle from falling.

  When the stand arm is bent and the motorcycle is upright by the stand, the stand arm may not be grounded, only the auxiliary wheel may be grounded, or both the auxiliary wheel and the rear wheel may be grounded. Good. Needless to say, the insertion width of the fork into which the axle of the support rod or auxiliary wheel is inserted is widened at the insertion port so that the axle of the support rod or auxiliary wheel can be easily inserted.

  According to a seventh aspect of the present invention, in the first to sixth aspects of the present invention, the handle that rotates so that one end surface of the joint surface portion with the second case approaches or separates from the working surface of the multi-stepped cam by lever operation. A first case to which a lever is attached; a second case provided with a guide hole at a substantially central portion so as to be orthogonal to the joint surface; and a shaft of the guide hole fitted into the guide hole of the second case The rod is slid in the direction and fixed to the other end of the rod positioned outside the second case, and the rod having the multi-stepped cam fixed to the end positioned inside the second case. An operation button; a spring provided between the operation button and the outer wall of the second case; and a spring for separating the cam from one end surface of the handle lever. The operation button while gripping the handle lever Push operation Then, if the grip operation of the handle lever is released, one end surface of the handle lever and the working surface of the cam are engaged to maintain the braking state of the front wheel and / or the rear wheel, and then again When the handle lever is gripped, the engagement is released and the braking state of the front wheel and / or the rear wheel is released.

  According to an eighth invention, in the first to sixth inventions, the strut includes an outer cylinder made of a cylinder whose upper and lower ends are sealed by an end cap, and an inner surface of the outer cylinder inside the outer cylinder. An inner cylinder made of a cylinder that slides in the axial direction and whose upper and lower ends are sealed by an end cap, and an axial core portion of the inner cylinder, and the lower end is fixed to the end cap at the upper end of the cylinder. A first rod having an upper end penetrating the end cap on the upper side of the outer cylinder, and a first mounting component attached to the upper end portion; and an inner cylinder, and is slid axially on the inner surface of the inner cylinder A piston that is disposed on an axial center of the inner cylinder, the piston is fixed to an upper end portion, and a lower end side of the outer cylinder that passes through a lower end cap of the inner cylinder and is positioned below the end cap. Fixed to the lower end cap, the lower end A second rod to which a second mounting component is attached, and a lower end cap of the outer cylinder and a lower end cap of the inner cylinder at the lower end of the outer cylinder. Is mounted in a second air chamber formed between a coil spring that is stored in the first air chamber and supports the load of the strut, and an end cap on the upper side of the outer cylinder at the upper end of the outer cylinder. A bumper rubber for limiting the amount of extension of the strut, and two oil chambers formed by dividing the inside of the inner cylinder vertically by the piston, and between the two oil chambers by expansion and contraction of the strut The traveling stable two-wheeled vehicle is characterized in that the damping oil moves through an orifice provided in the piston to obtain a predetermined damping force.

  By communicating the first air chamber and the second air chamber, it is possible to prevent the suction of dust when the first air chamber and the second air chamber are under negative pressure due to the expansion and contraction of the struts.

  According to a first aspect of the present invention, in a two-wheeled vehicle in which an auxiliary wheel is provided on a trailing arm type suspension device provided with a left and right independent trailing arm and struts on a rear wheel portion, a support for rotatably supporting the trailing arm is provided. The shaft is the lower part of the chain stay, and is provided outside and outside the outer diameter line of the rear wheel tire in a side view, the trailing arm is disposed substantially horizontally, and the upper part of the strut is connected to the chain stay or the chain stay and Since the two-wheeled vehicle is attached to the rear fork and the lower part is attached to the trailing arm, the fall-preventing function can be improved without impairing the form of the conventional two-wheeled vehicle.

  In addition, the overall size (full length, full height, full width) and weight are almost the same as conventional motorcycles, and handling and parking space at the time of parking are almost the same as conventional motorcycles. Can be adapted to the size (length 190 cm, width 60 cm). If the distance between the left and right wheels (tread) is the same as the distance between the outer edges of the left and right pedals, you can easily travel in a narrow passage, and if the distance between the outer edges of the handlebars is equal, you will have a higher fall prevention function. It is done.

  The present invention is not limited to so-called bicycles, and is widely applied to two-wheeled vehicles such as electric bicycles and motor-driven bicycles.

  In a second aspect based on the first aspect, the left and right trailing arms are fixed to the rear end portion outside the rear end of the axle so that the axle for rotatably supporting the auxiliary wheel intersects in the left-right direction. A bracket for attaching the lower portion of the strut is attached to the outside, and an arm collar for rotatably supporting the trailing arm penetrates in the left-right direction at the front end of the trailing arm. A cylinder is fixed to the lower wall of the left and right chain stays directly or via a support member, and the diameter of the cylinder expands from the left and right ends toward the center. The support shaft is attached to the support shaft, and the support shaft is fixed to the cylinder at the maximum diameter portion located at the center in the left-right direction of the support shaft. The inner end of the arm collar is the end of the cylinder. Part A two-wheeled vehicle that is assembled so as to overlap with a diameter portion and has a large sliding contact dimension between the arm collar and the small-diameter portion of the support shaft, and is located outside the trailing arm at the front portion of the axle. Since the bracket for attaching the lower part of the strut is provided, the torsional moment applied to the trailing arm due to the vertical load from the auxiliary wheel and the reaction force of the strut can be reduced to reduce the size of the trailing arm. In addition, since the arm arm collar of the trailing arm has a large dimension in the left-right direction, it avoids interference between the pedal and the front end of the trailing arm and avoids interference with the input load in the left-right direction of the auxiliary wheel. Sufficient strength and rigidity against bending moment applied to the collar (support shaft).

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the load rises at a wheel end of the auxiliary wheel in a range exceeding approximately 1/2 of the total amount of upward movement, and rises nonlinearly. Since the two-wheeled vehicle is characterized in that the amount is equivalent to, and preferably slightly smaller than, the amount equivalent to the static fall limit angle, there is an effect that the fall prevention function can be enhanced without impairing the ride comfort. Further, if the auxiliary wheel is prevented from rising and grounding when traveling straight (upright), the effect of reducing the running resistance can be obtained.

  According to a fourth aspect of the present invention, in the first or second aspect, the load-swarf characteristic at the wheel end of the auxiliary wheel is linear over substantially the entire range of the upward movement amount, and the total upward movement amount is static. Since the two-wheeled vehicle is characterized by being equivalent to or more than the equivalent tipping angle limit angle, the lightness of the two-wheeled vehicle can be maintained without impairing the slope running. Similarly to the third aspect of the present invention, if the auxiliary wheels are prevented from rising and grounding when traveling straight (upright), the effect of reducing traveling resistance can be obtained.

  According to a fifth invention, in the third or fourth invention, the damping force characteristic at the wheel end of the auxiliary wheel is a linear type, and the upward damping force is larger than the downward damping force, preferably more than twice. Since it is a two-wheeled vehicle having a certain feature, there is an effect that the damping force can effectively function to prevent the fall and the fall prevention function can be enhanced.

  According to a sixth invention, in the first to fifth inventions, there is provided a stand with a hook or fork that extends outward in the left-right direction from a substantially central portion of the left and right stand arms and extends in a substantially J shape forward in a side view. When the two-wheeled vehicle is made to stand upright by the stand, the hook or fork pushes down the support rod or the axle of the auxiliary wheel that extends inward in the left-right direction at the rear end of the left and right trailing arms or the rear wheel. The two-wheeled vehicle is characterized in that it is fixed in a straight traveling state in which the wheels and the auxiliary wheels are in contact with each other, the upward movement of the left and right auxiliary wheels is fixed, and the auxiliary wheels contribute to preventing the two-wheeled vehicle from falling. The left and right auxiliary wheels, which are wider than the ground width of the stand arm, touch the ground and contribute to preventing the motorcycle from tipping over. There is an effect that that. Further, the same effect can be obtained by changing the shape of the stand arm so that the stand arm does not come into contact with the two-wheeled vehicle upright.

  According to a seventh invention, in the first to sixth inventions, a parking brake operating device for front wheels and / or rear wheels is provided in the handlebar portion, and the braking state of the front wheels and / or rear wheels can be maintained. Therefore, if only the auxiliary wheel is grounded when the motorcycle is upright on the stand, both the auxiliary wheel and the rear wheel or the auxiliary wheel and the stand are grounded by the braking force of the front wheel. In such a case, the movement of the two-wheeled vehicle can be fixed by the braking force of the front wheels and the braking function of the stand, and an accident can be prevented.

  According to an eighth invention, in the first to sixth inventions, the strut includes an outer cylinder made of a cylinder whose upper and lower ends are sealed by an end cap, and an inner surface of the outer cylinder inside the outer cylinder. An inner cylinder made of a cylinder that slides in the axial direction and whose upper and lower ends are sealed by an end cap, and an axial core portion of the inner cylinder, and the lower end is fixed to the end cap at the upper end of the cylinder. A first rod having an upper end penetrating the end cap on the upper side of the outer cylinder, and a first mounting component attached to the upper end portion; and an inner cylinder, and is slid axially on the inner surface of the inner cylinder A piston that is disposed on an axial center of the inner cylinder, the piston is fixed to an upper end portion, and a lower end side of the outer cylinder that passes through a lower end cap of the inner cylinder and is positioned below the end cap. Fixed to the lower end cap, the lower end A second rod to which a second mounting component is attached, and a lower end cap of the outer cylinder and a lower end cap of the inner cylinder at the lower end of the outer cylinder. Is mounted in a second air chamber formed between a coil spring that is stored in the first air chamber and supports the load of the strut, and an end cap on the upper side of the outer cylinder at the upper end of the outer cylinder. A bumper rubber for limiting the amount of extension of the strut, and two oil chambers formed by dividing the inside of the inner cylinder vertically by the piston, and between the two oil chambers by expansion and contraction of the strut Is a traveling stable two-wheeler characterized in that a predetermined damping force is obtained by moving damping oil through an orifice provided in the piston. To shift adaptable, damping function of simplicity, there is an effect that a small strut is obtained.

  According to Japanese Patent Application No. 2008-137878, the applicant provided an auxiliary chair or luggage bag on the non-movable part when operating the handle such as the main frame or the head tube at the upper part of the handle shaft, and around the handle shaft from the front of the handle shaft. A two-wheeled vehicle that steers front wheels and prevents wobbling during low-speed traveling has been filed. By combining this with the first to eighth inventions, a two-seater that can carry two infants forward and backward A highly safe motorcycle can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, known portions, portions not directly related to the gist of the invention, and portions that are warped and become unclear due to description are omitted or simplified.

  The embodiment of the present invention is characterized in the rear half of the conventional motorcycle, and the front half is the same as the conventional motorcycle except for the handle lever portion.

  1 is a side view of a two-wheeled vehicle according to an embodiment of the present invention, FIG. 2 is an explanatory view of a rear wheel and an auxiliary wheel portion of FIG. 1, and FIG. 3 is a plan view according to FIG. These are the right view which concerns on FIG. 2, and show the rear surface of the two-wheeled vehicle which concerns on embodiment.

  1 to 4, 110 is a chain stay, 120 is a rear fork, 116 is a pedal, 114 is a chain, and 160 is a stand, which is the same as a conventional bicycle.

  141 is a pair of left and right trailing arms made of rectangular steel pipe with a rectangular cross section, RR is an auxiliary wheel, 150 is arranged between the chain stay 110 and the rear fork 120 and the trailing arm 141 and supports the upward load of the auxiliary wheel RR. It is a strut to do.

  The trailing arm 141 is bent at two locations, a front portion and a substantially central portion in a side view, has a substantially C shape in a plan view, and is pivotally supported on the front end portion of the motorcycle on the frame side of the motorcycle. An arm collar 1415 is provided (details will be described later).

  An axle 1412 passes through the rear portion of the trailing arm 141 in the left-right direction and is welded and fixed to the left and right vertical walls of the trailing arm 141. The auxiliary wheel RR is rotatably supported on the axle 1412.

  Reference numeral 115 denotes a cylinder for pivotally supporting the front end of the trailing arm 141 toward the chain stay 110, and is welded and fixed to the lower surface of the chain stay 110 via a support member 113 including three plates 1131, 1132, and 1133. Yes.

  Reference numeral 1411 denotes a flange-like reinforcing plate provided with a hole through which the axle 1412 passes in the center. The circumference of the hole is welded to the axle 1412 and the outer peripheral portion is welded to the vertical wall outside the trailing arm 141. 1414 is a press-molded bracket made of a steel plate for supporting the lower side of the strut 150, and is welded to the vertical wall outside the trailing arm 141.

  Reference numeral 1413 denotes a round rod steel support rod (details will be described later) which penetrates the trailing arm 141, protrudes inward in the left-right direction, and is welded to the left and right vertical walls of the trailing arm 141.

  Reference numeral 121 denotes a steel plate press-formed bracket for supporting the upper side of the strut 150, and a steel plate press-formed auxiliary bracket 122 having a U-shaped cross section formed by welding and fixing to the chain stay 110 and the rear fork 120. It is fixed to the outside by welding. The front and rear ends of the trailing arm 141 are open ends, but an end cap made of resin or the like may be attached, or a metal plate may be welded to form a closed structure.

  The auxiliary wheel RR includes a pneumatic tire and a spoke wheel, and is rotatably supported on the axle 1412 via any one of a flat bearing, a roller bearing, a ball bearing, and the like. If the outer diameter of the auxiliary wheel RR is increased, the auxiliary wheel RR is heavier and expensive, and if the outer wheel RR is decreased, the ground height is decreased. The axle 1412 may be fixed to the lower surface of the trailing arm for increasing the ground clearance.

  The front and rear positions of the axle 1412 are rear wheels so as to secure a gap between the auxiliary wheel RR and the stand operation parts such as the stand arm 161 and the lock plate 162 operating rod 1621 so as not to impair the operability of the stand 160. It is arranged in front of the RW axis. In addition, the position of the support shaft 142 at the front end of the trailing arm 141 is arranged on the outer side and the front side of the outer diameter of the rear wheel in a side view, and the length of the trailing arm 141 is increased. The front and rear positions of the axle 1412 can be moved further forward than the positions shown in FIGS.

  111 is a press-molded end plate made of a steel plate attached to the shaft core portion of the rear wheel RW, which is no different from the end plate of a conventional bicycle. Reference numeral 162 denotes a steel plate press-molded lock plate that is pivotally supported on a stand arm 161 by a support shaft 1613 and is hanger spring between a hanger piece 1111 of the end plate 111 and a hanger piece 1622 of the lock plate 162. When 112 is stretched and the lock plate 162 is tilted forward, the stand 160 is restrained in an upright state as in the conventional bicycle.

  In the present embodiment, since the auxiliary wheel RR is arranged in parallel to the outside of the rear wheel RW, the operation of the lock plate 162 is restricted by the auxiliary wheel RR, so the rod 1621 is attached to the outer surface of the lock plate 162. The operation of the lock plate 162 is excluded from being restricted by the auxiliary wheel RR. Although the auxiliary bracket 122 is provided for supporting the upper side of the strut 150, the end plate 111 may be enlarged and supported instead.

  Reference numeral 1611 denotes a hook that extends outward from the side surface of the stand arm 161 in the left-right direction, further extends forward in a substantially J shape in side view, and is welded and fixed to a substantially central portion of the upper and lower sides of the stand arm 161. When erecting, the support rod 1413 of the trailing arm 141 is pushed down to fix the upward movement of the auxiliary wheel.

  Reference numeral 1614 denotes an arc-shaped depression provided on the lower surface of the hook 1611, which gives a sense of moderation when the hook 1611 and the support rod 1413 are engaged, and prevents easy disengagement due to a small longitudinal force. .

  The procedure for parking the two-wheeled vehicle is the same as that of a conventional bicycle. The stand is pushed down (stepped down), the stand arm 161 is grounded, and the rear carrier frame 124 is lifted up to the point where the above-mentioned feeling of moderation is obtained. In this way, make the motorcycle stand upright. Then, the lock plate 162 is locked by pushing down the rod 1621. As a result, the hook 1611 pushes down the support rod 1413 so that the auxiliary wheel RR moves downward to the same position as the grounding surface of the stand arm, and the upward movement is fixed. Therefore, the left and right sides wider than the grounding width of the stand arm 161 are fixed. The auxiliary wheel RR effectively prevents the fall.

  In addition, when the shape of the stand arm was changed (Fig. 2, 161 ') and the two-wheeled vehicle was upright, the stand arm was not grounded, and the auxiliary wheel and the rear wheel were grounded without the support rod 1413 being pushed down or pushed down. The upward movement of the auxiliary wheel may be fixed while the vehicle is traveling straight, and only the auxiliary wheel RR may be grounded, or both the auxiliary wheel and the rear wheel may be grounded.

  In FIGS. 1, 2, and 4, GL indicates the ground contact surfaces of the front and rear wheels when the motorcycle is normally upright, and GL ′ indicates the contact surfaces of the auxiliary wheel and the stand arm when the motorcycle stands upright. Moreover, the two-dot chain line shown in FIG.

  FIG. 5 is a cross-sectional view of the support shaft portion of the trailing arm according to the embodiment of the present invention. In FIG. 5, reference numeral 142 denotes a support shaft made of a round steel bar having two steps with screw portions formed at the left and right ends and expanding toward the center. The center portion is formed by a bolt 1426, a spring washer 1427, and a nut 1428. It is fixed to the cylinder 115.

  Reference numeral 1415 denotes a steel pipe arm collar for pivotally supporting the trailing arm 141 toward the chain stay 110, and penetrates the inner and outer vertical walls of the trailing arm 141 and welds to the inner and outer vertical walls of the trailing arm 141. Has been.

  Then, O-rings 1425 are assembled to the left and right end portions of the cylinder 115, and the left and right small diameter portions of the support shaft 142 are fitted and inserted into the inner diameter portion of the arm collar 1415, and the inner end portion of the arm collar 1415 and the inner cylinder 115 The end portion overlaps, and a seal is formed by an O-ring 1425 at the overlap portion. The inner end surface of the arm collar 1415 contacts the stepped portion of the support shaft 142, and a plain washer 1421, a spring washer 1423, and a nut 1422. The arm collar 141 is fastened and fixed to the support shaft 142 so as to be rotatable.

  In order to avoid interference between the pedal 116 and the front end portion of the trailing arm 141 during operation, the left and right outer width intervals of the front end portions of the left and right trailing arms 141 are reduced. ) The dimension is increased so that it can sufficiently withstand the moment (moment about the vertical axis) applied to the arm collar 1415 by the lateral load of the auxiliary wheel RR. A dust cover 1424 is attached using a groove 1416 provided in the arm collar 1415.

  6A and 6B are cross-sectional views of the strut according to the embodiment of the present invention, in which FIG. 6A shows a compressed state and FIG. 6B shows an expanded state.

  In FIG. 6, 151 is an outer cylinder made of a round steel pipe. Reference numerals 1513 and 1514 denote upper and lower end caps, which are fixed to the upper and lower ends of the outer cylinder 151 with a plurality of screws.

  156 is a bumper rubber for limiting the stroke when the strut is extended, and 1515 is an end washer incorporating an O-ring 1516. The end washer 1515 and the bumper rubber 156 are both assembled between the upper end cap 1513 and the end of the outer cylinder 151.

  Reference numeral 153 denotes an inner cylinder made of a round steel pipe that is fitted into the outer cylinder 151 and slides in the vertical direction within the outer cylinder 151. Reference numerals 1531 and 1532 denote upper and lower end caps, and upper and lower ends of the inner cylinder 153. The airtightness is maintained by crimping the part.

  155 is a piston provided with orifices 1553 and 1554, and 154 is a round steel rod. The piston 155 is fixed to the upper end, and the lower side penetrates the end cap 1532 and is located below the end cap 1532. It is fixed to the end cap 1514 of the outer cylinder 151 using a snap ring 1541. Reference numeral 1534 denotes an O-ring that maintains airtightness between the rod 154 and the end cap 1532. A mounting component 158 for attaching the strut 150 to the bracket 1414 of the trailing arm 141 is attached to the lower end of the rod 154.

  The mounting component 158 for attaching the strut 150 to the trailing arm 141 includes a mounting rubber 1581 located above the bracket 1414 and upper and lower washers 1582, 1583, a mounting rubber 1581 located below and the upper and lower washers 1583. , 1584, a spacer 1585, a spring washer 1587, and a nut 1586.

  Reference numeral 1551 denotes a damping valve that controls the damping force, and is composed of a plurality of thin metal plates.

  Reference numeral 152 denotes a rod made of round steel bar. An end cap 1531 on the upper side of the inner cylinder 153 is fixed to the lower end, and an O-ring 1533 is incorporated to maintain airtightness. The upper end side of the rod 152 passes through the end cap 1513, and a mounting component 159 for attaching the strut 150 to the bracket 121 is attached to the upper end portion. These mount parts 159 have the same configuration as the mount parts in order to attach the strut 150 to the trailing arm 141 side, except that the spacer 1585 is not required.

  Reference numeral 1511 denotes a gas chamber for absorbing the volume variation of the rod 152 that enters and exits the inner cylinder 154 when the strut 150 is expanded and contracted, and 1552 is a free piston for preventing mixing of the damped oil and gas. The gas chamber 1511 is compressed when the strut 150 is compressed, and expands when the strut 150 is extended.

  Reference numeral 157 denotes a coil spring that supports the load of the auxiliary wheel RR. The inner cylinder 153 is spaced upward from the outer cylinder 151 to define the vertical spring characteristics of the auxiliary wheel RR.

  When the strut 150 is compressed and reaches a predetermined value, the coil spring 157 partially adheres and the load-sway characteristics become nonlinear. When the compression amount further increases, the coil spring adheres completely over the entire area and assists. The upward movement of the wheel is restricted.

  Further, in the expansion / contraction operation of the strut 150, when the piston 155 fixed to the outer cylinder 151 is used as a reference, the inner cylinder 153 moves up and down, and when extended, the damping oil is deformed and opened by the hydraulic pressure of the orifice 1553 and the damping valve 1551. A damping force is generated by moving from the first oil chamber 1512 to the second oil chamber 1517 through the perforated orifice 1554. On the other hand, at the time of compression, the damping oil passes only through the orifice 1553 and moves from the second oil chamber 1517 to the first oil chamber 1512 to generate a larger damping force than at the time of expansion.

  When the load on the auxiliary wheel RR decreases and the auxiliary wheel RR moves downward, the strut 150 extends, the inner cylinder 153 moves upward, and the end cap 1531 moves to the bumper rubber as shown in FIG. The bumper rubber 156 is compressed and deformed due to contact with the belt 156, and the load-swell characteristic of the bumper rubber 156 is raised, so that the downward movement of the auxiliary wheel RR is restricted.

  Since the first air chamber 1518 and the second air chamber 1519 suck in dust during decompression due to expansion and contraction of the strut 150, a communication pipe is provided along the outer cylinder 151, or between the inner cylinder and the outer cylinder. A ventilation groove is provided (not shown).

  Further, in this embodiment, the compression amount of the strut 150 is limited by the tight contact over the entire area of the coil spring 157. However, the bumper similar to the bumper rubber 156 on the extension side is formed on the inner diameter portion of the coil spring 157. A rubber may be provided to adjust the compression amount of the strut 150 (that is, the upward movement amount of the auxiliary wheel). In addition, a bumper rubber BR indicated by a two-dot chain line in FIG. 5B may be provided to make the load-sway characteristics of the auxiliary wheel RR non-linear.

  FIG. 7 is an explanatory diagram of the load-slack characteristic of the auxiliary wheel according to the embodiment of the present invention, and illustrates a non-linear case.

In FIG. 7, H is the maximum upward movement amount of the auxiliary wheel, and is the movement amount determined when the coil spring 157 is completely in contact with the entire region. I is the linear range of the load-tamper property. The HI region is a non-linear region of the load-swarf characteristic, and the load-swarf property rises as the contact portion increases due to partial contact of the coil spring and increases. K is the maximum downward movement amount of the auxiliary wheel, G is a non-linear region by the bumper rubber 156, the movement amount δ = 0 indicates the upright state of the two-wheeled vehicle, L is the bumper rubber 156 removed, and the load W of the auxiliary wheel RR is The amount of downward movement of the auxiliary wheel RR when set to ₀ , W ₀ is the load of the auxiliary wheel when standing upright, J is the amount of depression of the auxiliary wheel RR by the stand (downward movement amount), and ΔW is the lifting force required for the depression is there. The amount of movement (warm) δ and the load W both indicate values at the wheel end of the auxiliary wheel RR. When the spring constant of the coil spring 157 of the strut 150 is increased, the vertical load borne by the auxiliary wheel RR increases and falls. It is preferable from the viewpoint of prevention.

  However, a motorcycle is a vehicle in which the driver feels the inclination angle consciously or unconsciously, operates the steering wheel, and runs while tilting while balancing the direction of the resultant force of gravity and centrifugal force and the inclination angle of the motorcycle. Therefore, restraining this inclination hinders the two-wheeled vehicle from running on an inclination. Moreover, when the load burden of an auxiliary wheel is enlarged, rolling resistance will become large and the lightness of a two-wheeled vehicle will be impaired. There is also concern about slipping during rear wheel drive or braking.

  As an example of the present embodiment, when the tread of the auxiliary wheel (left-right distance) is 500 mm, the static fall limit inclination angle θ when riding three persons with two infants on the front and rear is approximately 12 degrees, The maximum upward movement amount H of the auxiliary wheel at that time is about 54 mm. When the linear range I is 1/2 of the maximum upward movement amount H of the auxiliary wheel, I is about 27 mm, and the equivalent inclination angle at this time is about 6 degrees.

  When this equivalent inclination angle is increased by 6 degrees, and it is desired to carry out an inclination traveling with a greater inclination, the linear range I may be increased to about 2/3 of the maximum upward movement amount H, or the tread T Is expanded within the range of 600 mm, and the linear range I is preferably expanded to about 2/3 of the maximum upward movement amount H.

  The pressing amount J of the auxiliary wheel RR by the stand 160 may be 10 to 20 mm.

  FIG. 8 is an explanatory diagram of other load-slipping characteristics of the auxiliary wheel according to the embodiment of the present invention, and shows two examples in the case of a linear shape. In FIG. 8, the load-damage characteristic line A is larger than that shown in FIG. 7 by eliminating the non-linear region due to the close contact of the coil spring and expanding the linear region and exceeding the movement amount H corresponding to the static fall limit inclination angle. By the way, upward movement is restricted by a bumper rubber (bumper rubber BR shown in FIG. 6). The load-swarf characteristic line B is the same as the load-swarf characteristic line A except that the auxiliary wheel RR is lifted by F when standing upright.

  Both the load-tamper characteristic lines A and B have a non-linear region due to the close contact of the coil spring shown in FIG. The wheel RR is lifted to reduce rolling resistance, and the lightness of the motorcycle is more important.

  9A and 9B are explanatory views of the handle lever portion of the parking brake device according to the embodiment of the present invention, in which FIG. 9A is a side view and FIG. 9B is a sectional view taken along line XX in FIG.

  In FIG. 9, reference numeral 171 denotes an inner case, and 172 denotes an outer case, which are fixed to the handle bar 178 by screws 1721 and 1722, and a handle lever 173 is pivotally supported by the case 172 by a pin 1731.

  Reference numeral 174 denotes a stepped cam having a plurality of diameters, and the cam working surface 1741 is provided with a gentle slope so that the engagement is not inadvertently disengaged when the handle lever 173 is engaged. A rod 175 is slidably fitted into the guide hole 1711 of the case 171, and a cam 174 is fixed to the end of the rod 175 located inside the case 171, and the rod 175 located outside the case 171. An operation button 176 is fixed to the other end of the. Reference numeral 177 denotes a coil spring for returning the operation button 176.

  When the handle lever 173 is grip-operated, a braking strategy is pulled and braking force is generated on the front wheels. If the operation button 176 is pushed while the handle lever 173 is gripped, the cam 174 moves in the axial direction, and the end surface (engagement surface) 1732 of the handle lever 173 and the cam surface on which the cam is gently inclined. If the grip force of the handle lever 173 is released in a state where the operation button 176 is pushed while being engaged with the gear 1741, the handle lever 173 is restrained by the cam 174 and the braking force is maintained. Since the handle lever end surface 1732 is also provided with a gentle slope corresponding to the cam surface 1741, the engagement between the handle lever end surface 1732 and the cam surface 1741 is not inadvertently released. Further, when the handle lever 173 is gripped, the engagement between the handle lever end surface 1732 and the cam surface 1741 is released by the extension force of the spring 177, the operation button 176 returns to the original position, and the braking force is released. The

  The end surface 1732 of the handle lever is engaged with one of the action surfaces 1741 of the multistage cams 174 in accordance with the adjustment of the brake line or the wear state of the brake shoes, and a predetermined braking force is ensured. .

  The parking brake operation device may be provided on either the left or right side of the handle bar. The front wheel and the rear wheel may be provided separately on the left and right sides, or the front and rear wheels may be used on both the left and right sides.

  When the motorcycle is upright on the stand, if the stand arm is not grounded and the auxiliary wheel and the rear wheel are grounded, the two-wheeled vehicle can be moved back and forth by the braking force of the parking brake on the rear wheel as well as the front wheel. It can be fixed to prevent a fall accident.

  Table 1 shows the grounding status of the auxiliary wheels, the rear wheels and the stand when the motorcycle is parked upright using the stand, and the use category of the parking brake at that time.

  In the case 1, the auxiliary wheel RR is pushed down to fix the upward movement of the auxiliary wheel, both the auxiliary wheel RR and the stand arm 161 are grounded, and the parking brake uses the brake function of the front wheel and / or the stand. Case 2 is a case in which the auxiliary wheel is pushed down to the extent that the stand arm is lifted, and only the auxiliary wheel is grounded to fix the upward movement, and the parking brake uses the front wheel.

  Case 3 changes the shape of the stand arm 161 to prevent the stand arm 161 from grounding when the two-wheeled vehicle stands upright with the stand 160, and the auxiliary wheel RR and the rear wheel RW are grounded without pushing down the auxiliary wheel RR. The upward movement of the auxiliary wheel RR is fixed in the straight traveling state, and the parking brake uses the front wheel and / or the rear wheel. Case 4 is the case 3 in which the auxiliary wheel RR is pushed down and the rear wheel is lifted to fix the upward movement of the auxiliary wheel RR, and the parking brake uses the front wheel.

  As described above, in the present embodiment, the support shaft 142 of the trailing arm 141 is the lower part of the chain stay 110 and is provided outside and on the front side of the outer diameter line of the rear tire RW in a side view. This is a two-wheeled vehicle in which an arm 141 is arranged substantially horizontally, an auxiliary wheel RR is rotatably attached to a rear end portion thereof, an upper portion of a strut 150 is attached to a chain stay 110 and a rear fork 120, and a lower portion is attached to the outside of a trailing arm 141. Therefore, the fall prevention function can be obtained without changing the basic structure of the conventional bicycle, and the lightness of the motorcycle is not impaired. In addition, it is possible to provide a stable traveling bicycle that conforms to the size of a normal bicycle as defined by current regulations.

  Further, since the arm collar 1415, the attachment portion under the strut, and the auxiliary wheel RR are arranged in a substantially straight line in plan view, the torsional moment applied to the trailing arm 141 is reduced, and the trailing arm 141 is reduced in size. Can be Further, since the left and right (sliding contact) dimensions of the arm collar 1415 are increased while avoiding interference between the pedal 116 and the trailing end of the trailing arm 141, the bending moment applied to the arm collar 1415 (the bending moment about the vertical axis) is increased. In contrast, it has sufficient strength and rigidity.

  In addition, the load and deflection characteristics of the auxiliary wheels are reduced.When the deflection is small, the spring constant is reduced and the roll stiffness is reduced, allowing the vehicle to run on the same slope as a conventional two-wheeler. The amount equivalent to the maximum tipping angle is increased, the spring constant is increased in the region exceeding 1/2 or 2/3, and the load-swarming characteristics are raised, so the auxiliary wheel functions effectively to prevent tipping and ride comfort Will not be damaged. Also, when emphasizing the lightness of motorcycles, widen the linear region of load-swarf characteristics so as not to impair the incline and prevent the increase of rolling resistance by floating the auxiliary wheels when traveling straight ahead. You can also

  Further, since the damping force characteristic of the strut 150 is a linear type and the damping force on the compression side is larger than the damping force on the expansion side, preferably twice or more, the fall prevention function is enhanced by the damping force. .

  When the two-wheeled vehicle is made to stand upright by the stand 160, the hook 1611 of the stand arm 161 pushes down the support rod 1413, both the auxiliary wheel RR or the auxiliary wheel RR and the stand arm 161 are grounded, and the auxiliary wheel RR or auxiliary wheel. Both the RR and the stand arm 161 function effectively to prevent the motorcycle from falling. Further, when the shape of the stand arm 161 is changed so as not to ground, the auxiliary wheel RR and the rear wheel RW are grounded without the hook 1611 of the stand arm 161 pushing or pushing the support rod 1413 down. Since the upward movement of the auxiliary wheel RR is fixed while the vehicle is running straight, the upward movement of the auxiliary wheel is fixed, so that the auxiliary wheel or both the auxiliary wheel and the rear wheel are grounded and function to prevent the motorcycle from falling.

  In addition, the parking brake can maintain the braking state of the front wheel and / or the rear wheel by operating the handle lever 173 and the operation button 176 in addition to the brake function at the time of parking by the stand 160 as in the conventional case. It is possible to prevent accidents caused by back and forth movement.

  The present embodiment is not limited to so-called bicycles, and can be widely applied to two-wheeled vehicles such as electric bicycles, motor-driven bicycles, and motorcycles.

1 is a side view of a motorcycle according to an embodiment of the present invention. It is explanatory drawing of the rear wheel and auxiliary wheel part of FIG. FIG. 3 is a plan view according to FIG. 2. FIG. 3 is a side view according to FIG. 2, illustrating a rear surface of the motorcycle according to the embodiment. It is sectional drawing of the spindle part of the trailing arm which concerns on embodiment of this invention. It is sectional drawing of the strut which concerns on embodiment of this invention, (A) is at the time of compression, (B) has shown at the time of expansion | extension. It is explanatory drawing of the load-drum characteristic of the auxiliary wheel which concerns on embodiment of this invention, and has shown the value of the wheel end. It is explanatory drawing of the other load-swallow characteristic of the auxiliary wheel which concerns on embodiment of this invention, and has shown two examples in the case of a linear. It is explanatory drawing of the handle lever part of the parking brake apparatus which concerns on embodiment of this invention, (A) is a side view, (B) is XX sectional drawing of FIG. It is a side view of the two-wheeled vehicle with an auxiliary wheel which concerns on a prior art example. It is an expansion perspective view of the auxiliary wheel part of the two-wheeled vehicle with an auxiliary wheel of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Two-wheeled vehicle 101 ... Main frame 102 ... Rear tube 110 ... Chain stay 111 ... End plate
1111 ... Hanger piece
1112 ... Chain tensioner 112 ... Hanger spring 113 ... Support member
1131 ... Plate
1132... Plate
1133: plate 114 ... chain 115 ... cylinder 116 ... pedal 117 ... axle (rear wheel)
120 ... rear fork 121 ... bracket (upper strut)
122 ... Auxiliary bracket 123 ... Roller bed stay 124 ... Roller frame 130 ... Saddle 131 ... Saddle post 140 ... Auxiliary wheel mounting device 141 ... Trailing arm
1411 ... Auxiliary plate
1412 ... Axle (auxiliary wheel)
1413 ... Support rod
1414 ... Bracket (under strut)
1415 ... Arm collar 142 ... Spindle
1421 ... Plain washer
1422 ... Nuts
1423 ... Spring washer
1424 ... Dust cover
1425 ... O-ring
1426 ... Bolt
1427 ... Spring washer
1428: nut 150 ... strut 151 ... outer cylinder
1511 ... Gas chamber
1512: First oil chamber
1513 ... End cap (upper side)
1514 ... End cap (lower side)
1515 ... End washer
1516 ... O-ring
1517 ... Second oil chamber
1518 ... First air chamber
1519 ... Second air chamber 152 ... Rod (outer cylinder)
153 ... Inner cylinder
1531 ... End cap (upper side)
1532 ... End cap (lower side)
1533 ... O-ring
1534 ... O-ring 154 ... Rod (inner cylinder)
1541 ... Snap ring 155 ... Piston 1551 ... Damping valve 1552 ... Free piston 1553 ... Orifice 1554 ... Orifice 156 ... Bumper rubber 157 ... Coil spring 158 ... Mount Part (second mounting part)
1581 ... Mount rubber 1582 ... Washer 1583 ... Washer
1584 ... Washer
1585 ...
1586 ... Nut
1587 ... Spring washer 159 ... Mount component (first mount component)
160 ... Stand 161, 161 '... Stand arm
1611 ... Hook
1612 ... Spindle (stand arm)
1613... Support shaft (lock plate)
1614 ... depression 162 ... lock plate
1621 ... Rod (lock plate)
1622 ... Hanger piece 163 ... Spring (stand lock)
170 ... parking brake operating device 171 ... case (second case, inside)
1711 ... hole 172 ... lever case (first case, outside)
1721 ... Screw
1722 ... Screw 173 ... Handle lever
1731 ... Pin (Casting)
1732 ... End face (engagement face)
174 ... Cam (with step)
1741 ·· Working surface 175 · · · Rod 176 · · · Operation button (push button)
177 ... Spring 178 ... Handlebar FW ... Front wheel RW ... Rear wheel RR ... Auxiliary wheel

Claims (8)

In a two-wheeled vehicle in which an auxiliary wheel is provided on a trailing arm type suspension device having a left and right independent trailing arm and a strut on the rear wheel,
The support shaft for rotatably supporting the trailing arm is the lower part of the chain stay, and is provided outside and on the front side of the outer diameter line of the rear wheel tire in a side view, and the trailing arm is arranged substantially horizontally. And
An upper part of the strut is attached to the chain stay or the chain stay and the rear fork, and a lower part is attached to the trailing arm (hereinafter referred to as “two-wheeled vehicle”). The left and right trailing arms are fixed to the rear end of the outer side with an axle that rotatably supports the auxiliary wheel intersecting in the left-right direction,
A bracket for attaching the lower part of the strut is attached to the front and outside of the axle, and an arm collar for rotatably supporting the trailing arm penetrates in the left and right direction at the front end of the trailing arm. , Fixed so as to protrude from the vertical wall inside the trailing arm,
On the other hand, a cylinder is fixed to the lower surface of the left and right chain stays directly or via a support member, and a stepped spindle that expands from the left and right ends toward the center is inserted into the cylinder. In the maximum diameter portion located in the center in the direction, the support shaft is fixed to the cylinder,
The inner end portion of the arm collar is assembled so as to overlap with the inner diameter portion of the end portion of the cylinder, and a large slidable contact dimension between the arm collar and the small diameter portion of the support shaft is ensured. The motorcycle according to claim 1. The load rises at the wheel end of the auxiliary wheel and rises in a non-linear manner in a range that exceeds approximately 1/2 of the total amount of upward movement.
3. The two-wheeled vehicle according to claim 1, wherein the total upward movement amount is equal to, or preferably slightly smaller than, a static fall limit angle equivalent amount. 4.   The load-wound characteristic at the wheel end of the auxiliary wheel is linear over substantially the entire range of the upward movement amount, and the total upward movement amount is equal to or more than the static fall limit angle equivalent amount. The two-wheeled vehicle according to claim 1 or 2, characterized by the above-mentioned.   The two-wheeled vehicle according to claim 3 or 4, wherein a damping characteristic at a wheel end of the auxiliary wheel is linear, and an upward damping force is larger than a downward damping force, preferably twice or more. A stand with hooks or forks extending from the substantially central part of the left and right stand arms to the outside in the left-right direction and extending in a substantially J-shape forward in side view,
When the motorcycle is brought upright by the stand,
The rear wheel and the auxiliary wheel are grounded without pressing down or pressing down the support rod or the axle of the auxiliary wheel that extends inward in the left-right direction at the rear end of the left and right trailing arms. Fix in the straight running state, fix the upward movement of the left and right auxiliary wheels,
The two-wheeled vehicle according to any one of claims 1 to 5, wherein the auxiliary wheel contributes to preventing the two-wheeled vehicle from toppling over. A first case in which a handle lever that rotates so that one end surface approaches or separates from an action surface of a multi-stepped cam by lever operation is attached to a joint surface portion with the second case;
A second case provided with a guide hole in a substantially central portion so as to be orthogonal to the joint surface;
A rod that is inserted into the guide hole of the second case and slides in the axial direction of the guide hole, and the multi-stepped cam is fixed to an end located inside the second case;
An operation button fixed to the other end of the rod located outside the second case;
A spring provided between the operation button and the outer wall of the second case, the spring separating the cam from one end surface of the handle lever;
If the operation button is pushed while gripping the handle lever, and then the grip operation of the handle lever is released, one end surface of the handle lever and the working surface of the cam are engaged, The braking state of the front wheel and / or the rear wheel is maintained, and then the grip is operated again to release the engagement, and the braking state of the front wheel and / or the rear wheel is released. Item 7. The motorcycle according to any one of Items 1 to 6. The strut is an outer cylinder made of a cylinder whose upper and lower ends are sealed by an end cap, and
Inside the outer cylinder, an inner cylinder made of a cylinder that slides in the axial direction on the inner surface of the outer cylinder and whose upper and lower ends are sealed by end caps;
Arranged at the axial center of the inner cylinder, the lower end is fixed to the end cap at the upper end of the cylinder, the upper end passes through the end cap at the upper end of the outer cylinder, and the first mount component is attached to the upper end A first rod to be
A piston disposed inside the inner cylinder and sliding in the axial direction on the inner surface of the inner cylinder;
The piston is fixed to the upper end of the inner cylinder, the lower end of the inner cylinder passes through the lower end cap of the inner cylinder, and the lower end of the outer cylinder is positioned below the end cap. A second rod fixed to the cap and having a second mounting component attached to the lower end;
Inside the outer cylinder and at the lower end, it is formed between the lower end cap of the outer cylinder and the lower end cap of the inner cylinder, and is stored in the first air chamber to support the load of the strut. Coil springs,
A bumper rubber that is attached to a second air chamber formed between the upper end caps of the outer cylinder at the upper end of the outer cylinder and restricts the amount of extension of the strut;
The piston has two oil chambers formed by dividing the inside of the inner cylinder into upper and lower parts, and damping oil is provided between the two oil chambers via an orifice provided in the piston by expansion and contraction of the struts. The two-wheeled vehicle according to any one of claims 1 to 7, wherein the motorcycle can move to obtain a predetermined damping force.

Images