JP2023012052A - Front two-wheel bicycle having vehicle body tilting device - Google Patents

Abstract

To provide a front two-wheel bicycle that enables a senior citizen to easily get thereon and easily handle it, by holding a vertical posture without being turned over even when getting thereon in the stop state, in which a vehicle body is mechanically tilted to a turning direction according to the steering of handlebars, and thereby a stable traveling is enabled on a curved road.SOLUTION: The front two-wheel bicycle has a configuration such that a rotary metal fitting to which a pitman arm 32 is fixed is connected to a holding body 25 of a front-wheel support frame 2 in which front wheels 16L and 16R are arranged on the right and left, a linear bush 44 incorporating a slide shaft is connected to a swing arm 41 fixed to a handle post 13, and the slide shaft and a rear part of the pitman arm 32 are connected by an L-shaped link ball 52S. With this configuration, the pitman arm 32 rotates leftward by steering a handle 12, connection rods 36M, 36L are moved leftward to rotate a knuckle arm 33L, at the same time, the linear bush 44 is moved, and the handle post 13 and a vehicle body 1 are tilted leftward by swinging the swing arm 41.SELECTED DRAWING: Figure 2

Description

The present invention relates to a bicycle that is steered by two front wheels, left and right, and the rear wheels are driven.

Conventionally, tricycles with front two-wheel steering are more stable than regular two-wheeled bicycles because they are less likely to tip over. It was difficult to incline, and it was necessary to reduce the speed of the bicycle extremely (below walking speed) because of the fear of falling outward due to centrifugal force. In order to solve this problem, the following proposals have been made for a three-wheeled bicycle having two left and right front wheels and one rear wheel to mechanically tilt the vehicle body when turning to facilitate curve travel.

For example, in Patent Document 1 already filed by the present applicant, the stability of the vehicle body is maintained by a spring-based upright posture holding function and a rocking mechanism, and a sliding mechanism is mounted on a bearing of a front hub attached to the center of a rocking arm. The linear bushings that incorporate the shafts are fixed, and when the pitman arm for steering that is fixed to the steering shaft rotates, the two front wheels turn left and right, and the slide shafts and linear bushes also move left and right in conjunction with each other. The swing arm swings in conjunction with the turning angle of the two front wheels, tilting the front wheels and mechanically tilting the body in the turning direction. It is possible to run smoothly on curves like a two-wheeled bicycle, and a proposal has been made to enable stable running as a bicycle with front two-wheel steering.

Japanese Patent No. 6030794

The three-wheeled bicycle described in Patent Literature 1 maintains the stability of the vehicle body by means of a spring-based upright position retention function and a swinging mechanism, so that even when the bicycle is stopped and both feet are placed on the pedals, the bicycle can be ridden stably without tipping over. When driving around a curve, the wheels automatically tilt in the turning direction according to the steering wheel, and the vehicle body tilts at the same time, making stable driving possible. Due to the addition of the vehicle body tilting device, the suspension mechanism does not fully utilize the suspension function. It was difficult for the elderly to ride and difficult to handle.

Furthermore, the introduction of a rocking mechanism and a body tilting device to the front two-wheeled bicycle to facilitate cornering made the structure more complicated, and the increase in the number of parts increased the weight of the body and increased processing time. There was also the problem of increased manufacturing costs compared to two-wheeled bicycles.

The present invention is intended to solve the problems of such a conventional structure, and when the vehicle is stopped, the stable state is maintained as before, while the number of components is reduced as much as possible and the weight is reduced. In order to make it easier to handle the front two-wheeled bicycle and to reduce the cost, the vehicle body tilting device works when traveling on a curve to enable stable traveling, and elderly people and people who are not accustomed to riding can ride easily. for the purpose.

In front two-wheeled bicycles that are steered by two front wheels, even if the direction of the left and right front wheels is changed by steering, the tilt of the front wheels is suppressed and only the body is tilted. A front wheel support frame and a vehicle body support frame provided in front of the handle post of the vehicle body that supports the rear wheels are connected by a universal joint so as to be able to swing, and a pitman arm arranged in the center of the front wheel support frame is fixed. The rotating body is connected to the holder of the front wheel support frame by another universal joint, and the connecting member provided in the steering shaft built in the handle post and the rotating body are connected by the universal joint other than the above. The swing arm is connected via a connecting rod and is fixed to the lower part of the handle post, and is connected to a movable connecting body by a universal joint other than the above. The swinging arm swings by the movement of the movable connecting body and the universal joint due to the pivoting action of (1), and the tilting of the handle post allows the vehicle body to tilt.

In a front two-wheeled bicycle steered by two front wheels, a load is applied to a front wheel support frame that supports left and right front wheels, and side bearings that are fixed to knuckle arms that directly support the front wheels arranged on the left and right sides of the front wheel support frame. Universal joints with different receiving directions in the axial direction and the radial direction are arranged above and below, and the axes of the mounting bolts of both shank parts are connected on the same vertical line, and the connecting body of the front wheel support frame that supports the left and right front wheels. and a structure in which a holder portion is connected to a side support and a side bearing that can rotate about a vertical axis is configured.

The plurality of universal joints are connected to the connecting body of the front wheel support frame so that the axes of the mounting bolts of the shank portions of the plurality of universal joints are on the same line, and the plurality of universal joints are connected to the vehicle body support frame provided on the handle post. and the axis lines of the holder portions are connected in a parallel state, and the connecting body of the front wheel support frame and the vehicle body support frame are connected, and the vehicle body is configured to swing as a rotatable bearing. .

The retainer of the front wheel support frame and the anti-rotation member attached to the holder portions of the plurality of universal joints connected to the swing arm are formed by bending a metal plate into a substantially U-shape so that the plurality of The gist of the structure is that the mounting portion of the holder portion of the universal joint has a groove for loose insertion, and is provided with a predetermined length and a plurality of mounting holes.

According to the present invention, the parts of the vehicle body tilting device are simplified and the weight is reduced. By tilting only the vehicle body, the front wheels are stabilized. It is easy to ride, even for people who are not used to riding, and it is possible to drive stably around corners.

1 is a front view showing an embodiment of a front two-wheeled bicycle having a vehicle body tilting device of the present invention; FIG. FIG. 2 is a front view showing a vehicle body tilted state during left turning from the state shown in FIG. 1 ; FIG. 2 is an enlarged cross-sectional view (side view) of a main part taken along line AA of FIG. 1; FIG. 2 is an enlarged front view of a main portion of FIG. 1; FIG. 4 is an enlarged cross-sectional view (front view) of a main part taken along line BB of FIG. 3; FIG. 6 is an enlarged cross-sectional view of a main part of a state in which the vehicle body is tilted when turning left from the state in FIG. 5 ; FIG. 4 is an enlarged cross-sectional view (top view) of a main part taken along line CC of FIG. 3; FIG. 8 is an enlarged cross-sectional view of a main part of a state in which the vehicle body is tilted when turning left from the state in FIG. 7 ;

The front two-wheeled bicycle according to the embodiment of the present invention may have one rear wheel or two rear wheels. Examples are described below with reference to FIGS.

In this embodiment, both the first embodiment and the second embodiment shown in FIG. , 16R side is the front side, the rear wheel 17 side is the rear side, the grip portion 19L is the left side, and 19R is the right side. In addition, the tricycle 1 will be described as the vehicle body 1 according to the situation of the text, and descriptions of devices that are not directly related to the vehicle body tilting device 1A of the tricycle 1, such as brakes and pedals, will be omitted.

3 and 4, the upper and lower axes of the I-shaped link ball 51M (universal joint) and the L-shaped link ball 52M (universal joint) connected to the bearing fittings 34L and 34R (side bearings), and the front wheel support. The upper and lower axes of the mounting portion of the link ball 52S (universal joint) connecting the rotating fitting 35 (rotating body) to the holding body 25 of the frame 2 are assumed to be the caster angles of the front wheels 16L and 16R. The caster angle is set to about 3 to 5 degrees rearward, which is the same as the caster angle of other models. It is set at an angle of 15 to 20 degrees. The camber angle of the front wheel support frame 2 is set such that the front wheels 16L and 16R are tilted inward by 2 to 3 degrees from the upright position shown in FIG. Both the first embodiment and the second embodiment are configured to meet these conditions.

A first embodiment of a front two-wheeled bicycle having a vehicle body tilting device will be described in detail with reference to FIGS. 1 to 8. FIG.
1, 3, 5 and 7, a vehicle body tilting device 1A for a tricycle 1 comprises a front wheel support frame 2 for supporting front wheels 16L and 16R, and a vehicle body 1 so that the vehicle body 1 can swing left and right. The body support frames 11H, 11M, and 11K provided in front of the handlebar post 13 are configured independently of each other. It is connected by 52M (universal joint) so that the vehicle body 1 can swing with the front wheel support frame 2 as a base.

The steering shaft 14 is built in the handlebar post 13 by connecting a rotating fitting 35 (rotating body) to which the pitman arm 32 is fixed to the holding body 25 of the front wheel support frame 2 with a plurality of L-shaped link balls 52S. The connecting plate 31 (connecting member) fixed to the lower part of the turning mechanism 3 and the mounting part 35a on the upper part of the rotating metal fitting 35 (rotating body) are connected by a plurality of L-shaped link balls 52S via connecting rods 36S. consists of a swinging portion having a connection hole for a swinging arm 41 fixed to the lower portion of the handle post 13, and a linear bushing 44 (movable connecting body) containing a slide shaft 45 (movable connecting body). are connected by a plurality of L-shaped link balls 52S, and the L-shaped link balls 52S connected to the rear part of the pitman arm 32 and the slide shaft 45 are connected to form the vehicle body tilting mechanism 4. Configured.

The front wheel support frame 2, the turning mechanism 3, and the vehicle body tilting mechanism 4 are linked. A vehicle body tilting device 1A capable of tilting a vehicle body 1 based on a front wheel support frame 2 supporting front wheels 16L and 16R is constituted by tilting a handle post 13 by rocking.

The vehicle body support frame 11H in front of the handlebar post 13 shown in FIGS. 3 and 5 has a groove and a plurality of connection holes into which the mounting portion of the shank portion of the L-shaped link ball 52M can be loosely inserted. A metal plate is formed in a shape and fixed to the handle post 13 .

For the purpose of supporting the vehicle body support frame 11H, the vehicle body support frames 11M and 11K are formed of metal plates in a substantially U-shape like the vehicle body support frame 11H, and the vehicle body support frame 11M shown in FIG. After the vehicle body support frame 11K is disposed substantially horizontally on the upper portion thereof and fixed thereto, the vehicle body support frames 11H, 11M, and 11K are fixed to the handle post 13 to form the vehicle body support frames 11H, 11M, and 11K.

The vehicle body support frame 11K also serves as a cage support frame for luggage, and also secures a mounting space for parts in the front.
The vehicle body support frames 11H, 11M, and 11K are formed of metal plates in a substantially U-shape in order to reduce their weight. can also be used arbitrarily,

The front wheel support frame 2 shown in FIGS. 3 to 5 and 7 has an upper support 21 formed of a metal plate in a substantially U shape and a lower support 23 formed by bending a flat steel into a trapezoidal shape. As a reference, the frame is formed by arranging the side supports 22L and 22R having metal plates formed in a substantially U-shape on both sides and having connection holes, and a flat steel is bent and formed to have a plurality of connection holes. A holding body 25 is disposed in front of the central portion, and connecting bodies 24L and 24R, which are metal plates formed in a substantially U-shape and have connection holes on the left and right upper parts of the upper support 21, and the upper support 21. At the center of the upper part, a metal plate is formed in a substantially U-shape, and a connection body 27 having a plurality of connection holes is arranged and fixed to each other to support the front wheel in a substantially trapezoidal shape as seen from the front as shown in FIG. A frame 2 is formed.

The connection between the vehicle body support frame 11H and the front wheel support frame 2 is such that, as shown in FIG. It is connected to the connecting body 27 of the frame 2, the axis of the holder part of the L-shaped link ball 52M is parallel to the vehicle body support frame 11H, and the mounting part faces upward and is connected to the vehicle body support frame 11H with the bolt 61 and bearings. , and the vehicle body 1 is supported by the front wheel support frame 2 in a swingable state.

When the L-shaped link ball 52M is connected to a fixed member with the axis of the holder part parallel and the axis of the mounting bolt of the shank part on the same line, the function as a universal joint is limited, but it is rotatable. It is easy to install and easy to use.
The bearing portion for connecting the vehicle body support frame 11H and the front wheel support frame 2 need not be limited to the L-shaped link ball 52M, and it is also possible to use a normal bearing using a ball bearing.

The turning mechanism 3 shown in FIGS. 3, 6, and 7 has a configuration based on a rotating metal fitting 35 (rotating body).
The rotating metal fitting 35 is formed by bending a metal plate at a plurality of locations and has a plurality of connection holes. The pitman arm 32 is positioned forward, and a rotating metal fitting 35 is arranged in the center and is rotatably connected to the holding body 25 via a plurality of link balls 52S via a detent 53M.

The pitman arm 32 is formed by bending a metal plate, and has connection holes at the tip and rear. 52S is connected to the knuckle arm 33R via the connecting rod 36M, and the link ball 52S is connected to the rear by the bolt 61 via the connecting pipe 46. As shown in FIG.

A mounting portion 35a provided at the upper end of the rotating metal fitting 35 and a connecting plate 31 (connecting member) built in the handlebar post 13 and provided on the steering shaft 14 are connected to a plurality of link balls 52S via connecting rods 36S. , and the turning mechanism 3 is configured.

A rocking arm 41 of the vehicle body tilting mechanism 4 shown in FIGS. 3 and 5 to 8 has a fixing portion 41a which is formed by bending a metal plate and can be loosely inserted into the handle post 13, and a rocking arm 41 having a plurality of connection holes. A fixed portion 41a is fixed to the lower portion of the handle post 13, and a reinforcing plate 42 for enduring the swing motion is fixed between the fixed portion 41a and the swing portion having a plurality of connection holes. there is

The connection fitting 43 is made of a metal plate and is bent into a substantially U-shape. A plurality of connection holes are provided on the left and right surfaces. The shank portions of a plurality of link balls 52S are connected to the left and right surfaces, the holder portion is connected to a plurality of connection holes of the swing portion of the swing arm 41 via detents 53S, and the linear bushing 44 The slide shaft 45 built in the pitman arm 32 is connected to the shank portion of the link ball 52S connected to the rear of the pitman arm 32 to constitute the vehicle body tilting mechanism 4. The mechanism 3 and the vehicle body tilting mechanism 4 are all connected to form a vehicle body tilting device 1A.

The detents 53S and 53M shown in FIGS. 2, 5, and 7 are composed of the swing arm 41, the L-shaped link ball 52S connecting the connecting fitting 43, the holder 25 of the front wheel support frame 2, and the rotating fitting. The axis of the holder portion of the L-shaped link ball 52S connecting the 35 is parallel, and the axis of the mounting bolt of the shank portion is on the same line. It is formed in a shape having a groove into which the mounting portion can be loosely inserted and a plurality of connecting holes. By introducing the detents 53S and 53M, it becomes easier to reinforce the member and position and attach the L-shaped link ball 52S, thereby improving workability.

When the steering wheel 12 is turned to the left as shown in FIG. 2, the vehicle body tilting device 1A operates as shown in FIG. 7 and FIG. 14 rotates to the left, and the rotating fitting 35 rotates to the left via the connecting rod 36S. A link connecting the rear part of the pitman arm 32 and the slide shaft 45 shown in FIGS. The ball 52S also rotates to the left in conjunction with the rotating fitting, and the rotation and sliding of the slide shaft 45 causes the lower part of the linear bushing 44 to move rightward in FIG. By swinging the moving arm 41, the handlebar post 13 swings and tilts leftward about the axis of the holder portion of the link ball 52M connecting the front wheel support frame 2 and the vehicle body support frame 11H. Tilt to the left.

When the handle 12 turns to the left, the connecting rod 36L hits the stopper 26 at the lower end of the holder 25 shown in FIG. 8, and the turning of the handle 12 stops. When the steering wheel 12 is steered, all parts of the vehicle body tilting device 1A work together to instantly tilt the vehicle body 1 and turn the front wheels 16L and 16R.
Although the above description is for a left turn, the same effect can be obtained for a right turn.

The front wheel support frame 2 holds the position where the rotating metal fitting 35 is arranged, supports the front wheels 16L and 16R while maintaining a state in which the rotating action is possible, and does not change position with respect to the inclination of the vehicle body 1. Since the camber angles of the front wheels 16L and 16R are tilted rearward by 3 to 5 degrees, the front wheels 16L and 16R are also slightly tilted in the tilt direction of the vehicle body 1, so that good curve travel is possible.

As a result, even if there is no inclination between the front wheels and the vehicle body due to the suspension mechanism of the front wheels, the vehicle body 1 can be tilted while the vehicle is traveling around a curve, and the steering wheel 12 swings while the front wheel support frame 2 supports the front wheels 16L and 16R. However, since the front wheels 16L and 16R do not tilt to the left and right, the wheels are stabilized, and kickback to the steering wheel during rough road running is reduced, enabling stable running.

With respect to the distance from the center of the steering shaft 14 to the grip portions 19L and 19R of the handle 12, the axis line of the L-shaped link ball 52S that rotatably connects the rotating metal fitting 35, the rear portion of the pitman arm 32, Since the distance from the center of the L-shaped link ball 52S connecting the slide shaft 45 to the center of the ball is set to about 1/5, the handle 12 is steered to tilt the vehicle body 1. Assuming that the rotation load applied to the grip portions 19L and 19R is 1, the swing arm can apply a rotation load about 5 times to tilt the vehicle body 1, and the vehicle body 1 can be tilted with a small force. .

When one of the front wheels 16L and 16R rides on a protrusion, the left and right rotation load of the one-side front wheel 16L or 16R is applied via the knuckle arms 33L and 33R from the rotation fittings. The load is transmitted to the steering wheel 12 via the moving arm 41, but the connection distance for the load is the opposite of that described above, and the load on the steering wheel 12 is about 1/5. It is possible to get on the vehicle even when the vehicle is stopped and the vehicle body 1 is leaned against.

The tilt angle of the vehicle body 1 by the vehicle body tilting device 1A is obtained by connecting the pitman arm 32 and the slide shaft 45 from the axis of the holder portion of the plurality of L-shaped link balls 52M to which the front wheel support frame 2 and the vehicle body support frame 11H are connected. The slide shaft 45 is connected from the size of the distance to the center of the ball incorporated in the L-shaped link ball 52S, or from the axis of the holder portion of the L-shaped link ball 52S that connects the rotating metal fitting 35 and the holder 25. Since the distance to the center of the ball built in the L-shaped link ball 52S can be varied, the component dimensions can be changed within the possible range to suit the passenger, and the inclination angle can be arbitrarily set. It is possible.

A second embodiment of a front two-wheeled bicycle having a vehicle body tilting device will be described in detail with reference to FIGS. 1 to 4. FIG.
The enlarged front view of the essential part in FIG. 4 is bilaterally symmetric except for the connecting rod 36M and the L-shaped link balls 52S connected to both sides thereof.

This embodiment is intended to achieve weight reduction by simplification of parts, and to achieve mass production and stabilization of quality using mass-produced and commercially available inexpensive general-purpose parts.

The rotatable side bearings shown in FIGS. 1 and 4 are fixed to connecting bodies 24L, 24R and side supports 22L, 22R fixed to both sides of the front wheel support frame 2, and to knuckle arms 33L, 33R. I-shaped link balls 51M (universal joint) that receive loads in the axial direction, and L-shaped link balls 52M (universal joints) that receive loads in the radial direction. , and are configured to directly support the front wheels 16L and 16R as rotatable side bearings.

1, 2 and 4, the knuckle arms 33L and 33R are formed by bending a metal plate, and have a reinforcing portion for supporting the lower surfaces of the bearing fittings 34L and 34R, a plurality of connecting holes in front and a central portion. Bearing fittings 34L and 34R are fixed to the fixing portion provided at the top, and a link ball 52S connected to the connecting rods 36L and 36M is connected to the front connection hole, Front wheel fixtures 37L and 37R are fixed to the central mounting portion.

The bearing fittings 34L and 34R are metal plates formed in a substantially U-shape, and are provided with connection holes on both sides and reinforcement portions formed by bending one of the lateral surfaces. At the connection part of the shank part, the connection hole on the lower surface becomes the connection part of the shank part of the L-shaped link ball 52M, and the axial lines of the mounting bolts of both shank parts are formed so that they can be connected on the same line. It is formed as a member having a strength that can withstand the weight of a user and load.

The combination of the I-shaped link ball 51M and the L-shaped link ball 52M takes into consideration the characteristics of the link balls. The ball 52M is arranged to bear the load in the front, back, left, and right directions, and it is possible to secure the same function as a side post assembled with a head tube, column, head accessory (dedicated bearing), etc. used in a normal bicycle. .

The connection to the front wheel support frame 2 is achieved by placing an I-shaped link ball 51M in the upper part of the bearing metal fittings 34L and 34R and an L-shaped link ball 52M in the lower part, as shown in FIG. After the nut 62 and the spring washer 63 are connected to each other, the holder portion of the I-shaped link ball 51M is connected to the connecting members 24L and 24R of the front wheel support frame 2 by the bolt 61 and the spring washer 63. , the holder portion of the L-shaped link ball 52M is connected to the side supports 22L and 22R with bolts 61 and spring washers 63. As shown in FIG.

The front wheels 16L, 16R are attached to the knuckle arms 33L, 33R to which the front wheel attachments 37L, 37R are fixed via the brakes 71L, 71R. A possible front two-wheel portion is configured.

By connecting the I-shaped link ball 51M, the holder portion of the L-shaped link ball 52M, and the shank portion to an integrated member, the function as a universal joint is limited, but the axis between the balls is It is fixed and, like a conventional side post, supports the front wheels 16L and 16R as a vertical bearing and exhibits a rotatable function. Even if the vertical positions of the I-shaped link ball 51M and the L-shaped link ball 52M are changed, the function of the bearing remains the same.

The features of the I-type link ball 51M and the L-type link ball 52M are that they are both commonly used in machine tools, are inexpensive due to mass production, have stable quality, are relatively lightweight, and can be easily connected with bolts and nuts. Therefore, the workability is good, and it is one of the parts that enables the production of front two-wheeled bicycles at low cost.

Since the I-shaped link balls 51M and the L-shaped link balls 52M described in the first and second embodiments are used in the parts that directly support the vehicle body 1 and the front wheels 16L and 16R, the connecting rods 36S, 36M, 36L, the L-shaped link ball 52S used for connecting the rotating metal fitting 35, etc., are increased in size to increase strength.
In the embodiment of the present application, 51M and 52M are sized up for the S display of the 52S.

The main components of the vehicle body tilting device 1A include a linear bushing 44, connecting rods 36S, 36M, and 36L in addition to the I-shaped link ball 51M and the L-shaped link balls 52S and 52M, which are mass-produced and stable in quality. By using commercially available parts such as parts, it is possible to secure quality and manufacture at a low cost. If the functions can be secured, it is possible to use other parts and parts specially manufactured for bicycles without sticking to the current parts.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above embodiments, and various modifications are possible without departing from the scope of the present invention.
For example, in the present embodiment, the rotating metal fittings 35, the pitman arm 32, and the front wheel support frame 2 are described as being formed of metal plates, but there are no particular limitations including the shape, as long as the strength can be ensured. Instead, it is possible to use plastic or the like.

Although the above has been described as a three-wheeled bicycle 1 with two front wheels, if the vehicle body can be tilted without being bound by the three-wheeled bicycle 1, the vehicle body tilting device can also be applied to a bicycle having multiple rear wheels 17 or an electrically assisted bicycle. It is possible to construct 1A.

1 ・・・・・・・・・・・・ Tricycle (body)
1A ・・・・・・・・・・・Vehicle tilting devices 11H, 11M, 11K ・・・Vehicle support frame 12 ・・・・・・・・・・・・Handle 13 ・・・・・・・・・・・・Steering shaft 15 Steering bearings 16L, 16R Front wheels 17 ···· Rear wheel
18 ・・・・・・・・・・・・ Saddle 19L, 19R ・・・・・・・・ Grip portion 2 ・・・・・・・・・・・・ Front wheel support frame
21 ・・・・・・・・・・・・ Upper supports 22L, 22R ・・・・ Side supports 23 ・・・・・・・・・・・・ Lower supports 24L, 24R ・・・・・ Connecting body 25 ・・・・・・・・・・・・ Holding body 26 ・・・・・・・・・・・・ Stopper 27 ・・・・・・・・・・・・ Connecting body 3 ・・・・・・・・・・・・・・・・ Turning mechanism 31 ・・・・・・・・・・・・ Connecting plate (connecting member)
32 ・・・・・・・・ Pitman arms 33L, 33R ・・・・ Knuckle arms 34L, 34R ・・・・ Bearing fittings (side bearing body)
35 ・・・・・・・・・・・・ Rotating fitting (rotating body)
35a ・・・・・・・・ Mounting portions 36S, 36M, 36L ・・・・ Connecting rod
37L, 37R --- Front wheel fixture
4 ・・・・・・・・・・・・Vehicle tilting mechanism 41 ・・・・・・・・・・・・ Swing arm
41a ・・・・・・・・・・・・Fixing portion 42 ・・・・・・・・・・・・ Reinforcing plate 43 ・・・・・・・・・・・・ Connecting fitting 44 ・・・・・・・・・・・ Linear bushing (movable connector)
45 ・・・・・・・・・・・・ Slide shaft (movable coupling body)
46 ・・・・・・・・・・・・ Connecting pipe
51M ・・・・・・・・・・・・ I-type link ball (universal joint)
52S, 52M ・・・・・・ L-shaped link ball (universal joint)
53S, 53M ・・・・・・・ Whirl-stop 61 ・・・・・・・・・・・・ Bolt 62 ・・・・・・・・・・・・ Nut 63 ・・・・・・・・ Spring Washer 64 ・・・・・・・・ Flat washer 71L, 71R ・・・・ Brake

Claims (4)

In a front two-wheeled bicycle steered by two front wheels, a rotating body arranged in the center of the front wheel support frame is swingably connected to a vehicle body support frame provided in front of a handle post of a vehicle body that supports the rear wheels; A connecting member provided on a steering shaft built in the handle post is connected, and a swing arm fixed to the handle post and the rotating body are connected to a movable connecting body by a universal joint, A front two-wheeled bicycle having a vehicle body tilting device, wherein the vehicle body tilting device is constructed based on the front wheel support frame. In a front two-wheeled bicycle steered by two front wheels, universal joints that receive loads in different directions are arranged above and below a side bearing body fixed to a knuckle arm to which the two front wheels are connected, and the axes of the mounting bolts are aligned. A vehicle body tilting device characterized in that a rotatable side bearing is configured by connecting a holder part to a connection body of a front wheel support frame which is connected on the same line and supports left and right front wheels, and to a side support body. A front two-wheeled bicycle with Axes of mounting bolts of shank portions of a plurality of universal joints are connected on the same line to the connecting body of the front wheel support frame, and holder portions of the plurality of universal joints are connected to the vehicle body support frame provided on the handle post. 2. The front two-wheeled bicycle with a vehicle body tilting device according to claim 1, wherein the axes are connected in parallel and the vehicle body support frame is constructed as a swingable bearing. A metal plate is formed in a substantially U-shape in a connection portion of the universal joint connected to the front wheel support frame and the swing arm, and a groove into which the mounting portion of the holder portion of the universal joint can be loosely inserted. 2. The front two-wheeled bicycle having a vehicle body tilting device according to claim 1, wherein a detent member having a predetermined length and a plurality of mounting holes is provided.

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