JP6347011B2 - Body tilting device for turning two-wheel bicycles - Google Patents

Description

The present invention relates to a bicycle that is steered by two front wheels on the left and right and drives a rear wheel.

Conventionally, front two-wheel steering three-wheeled bicycles, etc. are more stable than conventional two-wheeled bicycles, so they have been developed for elderly people and those who are not accustomed to riding bicycles. It was difficult to incline and it was necessary to reduce the speed of the bicycle to the extreme (below walking speed) because of the fear of falling outward due to centrifugal force. In order to solve this problem, as a three-wheeled bicycle having two front wheels on the left and one on the left and one rear wheel, the following proposals have been made in order to facilitate curve traveling by mechanically tilting the vehicle body when turning.

For example, Patent Document 1 already filed by the present applicant has a pair of left and right formed in a curved shape attached to a steering turning shaft while maintaining the stability of the vehicle body by an upright posture holding function by a spring and a swing mechanism. Even if the cam is in contact with a plurality of rotating bodies attached to the swing arm of the swing mechanism and stopped by holding the handle, the bicycle does not fall down even if both feet are put on the pedal, and stable riding is possible. Yes, the front two wheels are steered by steering the steering wheel when turning, and the body tilts in the direction of the vehicle body by the cam and the rotating body. It has been proposed that it can be tilted easily, and can be smoothly curved like a normal two-wheeled bicycle, and can be kept stable as a front two-wheel steering bicycle.

Japanese Patent No. 5571611

In the three-wheeled bicycle described in Patent Document 1, the stability of the vehicle body is maintained by an upright posture holding function and a swinging mechanism by a spring, and a pair of left and right cams attached to the turning shaft are curved. Even if you put your feet on the pedals while in a stationary state, you can get on with a stable ride without touching the bicycle. With the action of the rotating body, the vehicle body is mechanically tilted in the turning direction in conjunction with the direction of the front wheel, so it is easy to tilt the body in the tilt direction of the vehicle body, enabling smooth curve driving similar to a normal two-wheeled bicycle. ing.

However, the cam and the rotating body are constituted by a plurality, and the left and right cams are attached to the turning shafts of the front two wheels, and by operating the handle, the plurality of cams move separately with respect to each rotating body, If the left and right cams and the rotating body are in contact with each other at the same time, the steering wheel operation may become heavy or may not move.Therefore, a certain clearance is required between the cam and the rotating body. Since advanced processing technology is required and the cost increases, there will usually be a slight gap, which will cause rattling as play on the left and right of the car body, and there is no problem for those who are used to riding bicycles Although there are no elderly people or people who are not used to riding, even if the handle is firmly held and fixed, the car body will swing left and right, and the bicycle will not be stable when riding and it will be difficult to ride There was a cormorant anxiety.

Further, the turning angles of the front wheels are 45 to 50 degrees from the straight state to the left and right, respectively, and since the vehicle body is inclined during this time, the distance that the cam contacts the rotating body is shortened, and the contact angle of the cam with respect to the rotating body is increased. It is necessary to be able to receive the reverse action as well as the tilting action that the cam gives to the car body, and if a lateral external force is applied to the car body, it can not be supported by the cam and the handle easily rotates in conjunction with the movement of the car body. It felt uneasy because it moved, and it was necessary to stop the rotation by firmly holding the handle when boarding, causing dissatisfaction that it was difficult to ride.

In addition, since a large load is applied to the cam when the bicycle is turned, the cam mounting tool ensures the strength of the components that can withstand the load, and the groove for preventing rotation of the mounting portion on the turning shaft and the cam support portion. Protrusion processing for non-rotating is required, the accuracy of the cam and rotating body mounting structure including the cam shape is required, and the tilt angle during turning is changed according to the rider's physique, exercise capacity and preference If it is desired to do so, it is necessary to change the shape of the cam by remanufacturing or to prepare a cam with a different shape as a spare, resulting in an increase in manufacturing cost.

The present invention is intended to solve the problem of such a conventional configuration. When the vehicle is stopped, the vehicle body is reduced in the lateral movement, and the vehicle body receives external force from the left and right. However, the purpose is to eliminate the dissatisfaction that it is difficult to ride and to reduce the cost by making the structure that the steering wheel is difficult to rotate, so that elderly people, people who are not accustomed to riding, etc. can easily get on.

In a bicycle that can be steered by two front wheels and the vehicle body can be tilted to the left and right, the vehicle body is tilted by a pitman arm, a connecting device, and a plurality of universal joints. One of the universal joints fixed to the steering shaft built in the handle post in a state substantially orthogonal to the swing arm and connected to both ends of a connector is connected to the pitman arm. The other universal joint is fixed to either the right side or the left side of the swing fulcrum of the swing arm. A link mechanism is formed by connecting the action line of the universal joint connected to the connection member to the rear of the universal joint connected to the pitman arm. During the steering, the pitman arm and the universal joint rotate left and right with the axis of the steering shaft as a base point, and the universal joint connected to the connecting member of the swing arm works in parallel with the swing arm. The gist of the structure is that the mechanical shaking of the vehicle body is reduced to tilt left and right.

In a straight traveling state of a bicycle that can be steered by two front wheels and the vehicle body can be tilted to the left and right, the rear end of the pitman arm is attached to the bearing set fixed to the swing bearing holder at the center of the swing arm. Is connected to the front in a state perpendicular to the connecting portion, and a rotating arm integral with the pitman arm is provided laterally from the connecting portion, and one of a plurality of universal joints connected to both ends of the connecting tool is the pitman. The arm is connected to a front position with a fixed distance from the center of the bearing set via a connecting collar, and the other universal joint is located on the right side or the left side of the swing fulcrum of the swing arm. Connected to a connecting member fixed to any one of them, and the action line of the universal joint connected to the connecting member is located behind the universal joint connected to the pitman arm. Are each other The vehicle tilting device 2 is configured such that one is connected to the tip of the rotating arm and the other universal joint is connected to the tip of the connecting arm fixed to the steering shaft of the handle post. The steering shaft is separated, and by adjusting the dimensions of the plurality of universal joints, the front and rear wheels can be arranged in front of and behind the handle post, and the front two wheels can be arranged in front of the handle post. The gist of the structure is that it can be easily designed.

A connecting portion of the universal joint connected to the pitman arm via a connecting collar, a mounting plate to which a connecting member to which the universal joint is attached is fixed, and a pedestal portion of the swing arm are provided with long holes. The mounting position can be freely changed, and by adjusting the length of the coupling that connects the universal joint attached to the pitman arm side and the universal joint connected to the connection member fixed to the swing arm, Combined with the state in which the interval between the universal joints can be changed freely, the vehicle body can be adjusted from the vertical state to the left and right at the same angle, and a structure that can freely change the vehicle body inclination angle enables the inclination angle when turning The gist is to make the front two-wheel bicycle easy to ride, which can be fine-tuned according to the situation of elderly people and people who are not used to riding.

One of the universal joints connected to both ends of a short-sized connecting rod is connected to a tip portion having a certain distance forward from the universal joint connected to the pitman arm, and the other universal joint is connected to the second joint. The front end portions of the left and right knuckle arms are connected to the lower front end portions of either one of the left and right sides of the knuckle arm fixed to the turning shafts of the two front wheels, and are connected to both ends of the long-sized connecting rod. The gist is a structure in which the pitman arms are rotated by steering the bicycle, and the turning of the two front wheels and the inclination of the vehicle body proceed simultaneously.

According to the present invention, when the vehicle is in a stopped state, the vehicle body is less likely to swing left and right, and the handle is difficult to rotate even when subjected to external force from the left and right, and the vehicle body can be stabilized when the vehicle is stopped. Elderly and unfamiliar people are easy to ride, and even if you put both feet on the pedals when stopped, the bicycle will not fall down and you can ride stably with a light grip on the handle. A stable inclination with little body shake makes it possible to drive at a speed suitable for the passenger. Furthermore, the cost could be reduced by using many commercially available inexpensive mass production parts in the main part.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a first embodiment of a vehicle body tilting device when turning a front two-wheel bicycle according to the present invention. It is an AA principal part expanded sectional view of FIG. It is BB principal part sectional drawing of FIG. FIG. 4 is a bottom view of FIG. 3. FIG. 4 is a front view showing a vehicle body tilting state when turning left from the state of FIG. 3. FIG. 6 is a bottom view of FIG. 5. FIG. 4 is a front view showing a vehicle body tilting state when turning right from the state of FIG. 3. FIG. 8 is a bottom view of FIG. 7. FIG. 3 is a front view showing a first embodiment of a vehicle body tilting state when turning a left front bicycle. FIG. 6 is a trajectory diagram showing the movement of the central part of the universal joint on the pitman arm side and the universal joint on the swing arm side that occurs due to the turning of the front two wheels and the inclination of the vehicle body. FIG. 11 is a trajectory diagram illustrating the movement of the central portion of the universal joint to which virtual action lines are added in FIG. 10. It is a front view which shows the 2nd Example of the vehicle body tilting device at the time of front two-wheel bicycle turning of this invention. It is CC principal part expanded sectional drawing of FIG. It is DD principal part sectional drawing of FIG. It is a bottom view of FIG. It is a front view which shows the vehicle body inclination state at the time of left turn from the state of FIG. FIG. 17 is a bottom view of FIG. 16. It is a front view which shows the 2nd Example of the vehicle body inclination state at the time of a front two-wheel bicycle left turn.

A vehicle body tilting apparatus for turning a front two-wheeled bicycle according to an embodiment of the present invention will be described in detail with reference to FIGS.

In this embodiment, both the first example and the second example get on the front two-wheeled bicycle 1, and the front wheels 15L and 15R side is the front, with the steering wheel 11 in the straight traveling state and facing forward. The three-wheeled bicycle 1 will be described with the rear wheel 16 side as the rear, the left hand side as the left, and the right hand side as the right. Further, the three-wheeled bicycle 1 will be described as the vehicle body 1 according to the state of the text, the universal joint will be described as the rod end Brg25 and the link ball Brg45, and the bearing set will be described as the Brg holder set 123.
The description of devices that are not directly related to the vehicle body tilting device 2 when turning the front two-wheel bicycle, such as brakes and pedals, is omitted.

As shown in FIGS. 1 and 2, the existing structure related to the vehicle body tilting device 2 of the three-wheeled bicycle 1 is such that the steering shaft 13 connected to the handle 11 is pivotally supported by the steering bearing 14 of the handle post 12. The support frame 17 is fixed to the front of the handle post 12, the side posts 41L and 41R are arranged on the left and right sides, and the two front wheels 15L and 15R are knuckle on the turning shafts 42L and 42R supported by the turning bearings 43L and 43R. The knuckle arms 44L and 44R are connected via a plurality of link balls Brg45 whose upper ends are connected to both ends of the connecting rod 46L, and the lower end of the connecting rod 46S is connected to the lower end of the knuckle arm 44L. One of the plurality of link balls Brg45 connected to both ends is connected, and the other is connected to the top surface of the tip of the pitman arm 21.
The swing mechanism 3 is connected to the front and rear of a connecting shaft 32C of a swing bearing 33C fixed to a bearing holder 34 fixed to the support frame 17 at the center of the plurality of swing arms 31, and the left and right ends are side posts. The rocking bearings 33L and 33R fixed to the 41L and 41R are connected to the front and rear of the connecting shafts 32L and 32R, respectively.
The spring 35 for holding the upright posture is fixed to a swing receiver 31 connected to swing bearings 33L and 33R fixed to the side posts 41L and 41R at a center portion thereof, and fixed to the support frame 17; The side posts 41L and 41R are interlocked so that the vehicle body tilts to the left and right and can be restored vertically.

By newly installing the vehicle body tilting device 2 in the existing structure, the vehicle body 1 is mechanically tilted as shown in FIG.

The rear end portion of the pitman arm 21 is fixed to the lower end portion of the steering shaft 13 supported by the steering bearing 14 fixed to the handle post 12 shown in FIGS. One of the rod ends Brg25 connected to the right and left of the tool 26 is connected to the lower surface of the central portion of the pitman arm 21 with the connecting collar 22, the adjustment washer 28 and the bolt 61 and the nut 62, and the other rod end Brg25 is The front end portion of the pitman arm 21 is connected to the front end portion of the connecting member 24 fixed to the lower surface of the pedestal portion 37 of the swing arm 31 at the right side of the connecting shaft 32C by the nut 62 via the adjustment washer 28. A link mechanism in which one of the link balls Brg45 connected to the left and right of the connecting rod 46S is connected to the upper surface of the connecting rod 46S and the other is connected to the lower end side of the tip of the knuckle arm 44L. , 9 in left steering handle is configured such that the vehicle body 1 is inclined to the left.

The mounting plate 23 fixed to the connecting member 24 can be fixed to the pedestal portion 37 of the swing arm 31 at either the left or right position of the connecting shaft 32C, but the right side shown in FIG. It will be described as fixed to.

The difference between the front and rear angles of the handle post 12 and the side post 41R shown in FIG. 2 is that, in a normal two-wheeled bicycle, the caster angle of the handle post is 18 degrees backward relative to the ground contact surface of the wheel. The car, buggy car, etc., which are tilted by 20 degrees and are steered by the front two wheels, are set so that the caster angle is tilted about 3-5 degrees to the rear of the side post, and each has a running record. The handle post 12 of this embodiment is adjusted to the familiar caster angle of a two-wheeled bicycle, and the side post of the front two wheels actually turning is adjusted to the caster angle of an automobile, a buggy or the like. For this reason, even if the side posts 41L and 41R are arranged in front of the handle post 12, the setting is such that they intersect at the lower side, and the setting of the vehicle body tilting device 2 is possible as long as the side posts 41L and 41R are not arranged significantly forward.
However, since the three-wheeled bicycle 1 does not compete for speed, the axis of the handle post 12 and the axis of the side posts 41L and 41R can be arranged on the same line on the left and right to make the same caster angle. If the rod end Brg25 connected to the connecting member 24 is positioned rearward with respect to the position of the rod end Brg25 connected to the arm 21 and the vehicle body 1 can be inclined, the handle post 12 and the side post The arrangement of 41L and 41R and the caster angle can be freely changed.

The pitman arm 21 shown in FIGS. 2 to 4 is a metal plate and is formed in a substantially square shape. One end portion is fixed to the steering shaft 13, and the linear portion from the fixed portion to the central portion swings. A link ball Brg45 that is connected to a connecting rod 46S that is connected to a turning knuckle arm 44L is connected to the upper surface of the foremost part orthogonally to the arm 31, and is connected to the central portion from the steering shaft 13 at a certain point. A long hole 27a that can change its position in the front-rear direction is provided, and a rod end Brg25 for tilting the vehicle body is connected to the lower surface via a connecting collar 22 and an adjustment washer 28, and the front wheel is driven by steering the handle 11. The structure is such that the turning of 15L and 15R and the inclination of the vehicle body 1 proceed simultaneously.

The substantially square shape of the pitman arm 21 is configured such that the steering shaft 13 is rearward with respect to the turning shafts 42L and 42R shown in FIGS. 2 to 4, and the link is attached to the front end portion of the pitman arm 21. Since the line connecting the center of the ball Brg45 and the center of the steering shaft 13 is set to be perpendicular to the axis of the connecting rod 46S connecting the tip of the pitman arm 21 and the knuckle arm 44L, the connecting rod 46S is connected to the knuckle arm. 44L, when the pitman arm 21 rotates, the load applied between the knuckle arms 44L and 44R is divided into the case of pulling and the case of pushing, but the load applied to the steering wheel at the time of turning is made to be the same on the left and right. It is.
The shape of the pitman arm 21 does not stick to a substantially square shape, the tip portion is formed in an L shape, the center of the link ball Brg 45 attached to the front end portion of the pitman arm 21 and the center of the steering shaft 13. The line connecting the two may be set to be perpendicular to the axis of the connecting rod 46S.

The swing mechanism 3 shown in FIG. 1 to FIG. 4 has a plurality of swing holes 31 c that are made of metal and bent in a substantially U-shape and are long to the left and right, and whose mounting positions can be changed. The pedestal portion 37 is provided at the lower right side of the rocking bearing 33C, and a plurality of long holes 27b for allowing the mounting plate 23 fixed to the connecting member 24 to change the position in the front-rear and left-right directions have a plurality of lengths. The mounting plate 23 is fixed to the lower surface of the pedestal portion 37 with bolts 61 and nuts 62 via a washer 63, and the central portion of the plurality of swing arms 31 is a support frame. 17 is connected to a connecting shaft 32C of a swing bearing 33C fixed to a bearing holder 34 attached to the bearing holder 34, and both ends are connected to connecting shafts 32L and 32R of swing bearings 33L and 33R fixed to turning shafts 42L and 42R. ing.
At the upper part, the central part of the plurality of springs 35 is fixed to the support frame 17, and both left and right ends are fixed to spring receivers 36 connected to the swing bearings 33 </ b> L and 33 </ b> R, and swings up and down as the vehicle body 1 tilts. The upright posture is maintained by the action of the spring 35 when the vehicle is empty.
The rocking bearings 33C, 33L, and 33R shown in FIGS. 1 to 3 use inexpensive bicycle hubs, but other bearings can be used as long as they have sufficient rigidity to support the vehicle body 1. .

The swing arm 31 shown in FIG. 1 applies a non-uniform load to the front wheels 15L and 15R during traveling, and the side posts 41L and 41R and the connection shafts 31L and 31R are connected shafts 32C at the center of the swing arm 31. As a result, the upper and lower sides of the swing arm 31 may be twisted and the caster angles of the side posts 41L and 41R may be different from each other. This is realized by fixing the portion 37 and the mounting plate 23.

The connecting member 24 is a metal round bar shown in FIG. 3, one end of which is fixed to the mounting plate 23, the other end is threaded for connection, and the rod end Brg 25 has an adjustment washer 28. And is connected by a nut 62.
The connecting member 24 can be bent with a metal plate integrated with the mounting plate 23 without being particular about the current method, and the link ball Brg 45 can be connected. If the strength can be secured, the synthetic resin can be integrally molded. Is possible.

3 and 4, the connector 26 is made of metal and is threaded on both left and right ends to connect the rod end Brg 25, and one rod end Brg 25 is adjusted with the connecting collar 22 at the center of the pitman arm 21. The bolt 61 and the nut 62 are connected via the washer 28, and the other rod end Brg25 is connected to the connecting member 24 by the nut 62 via the adjustment washer 28 to constitute a link mechanism. The connector 26 may be a hexagonal long nut (commercially available) as shown in FIGS.

When the steering shaft 13 is rotated to the right by the steering of the handle 11 and the pitman arm 21 pushes the connecting tool 26 as shown in FIG. 7, the connecting collar 22 and the handle post 12 shown in FIG. The pitman arm 21 is rotated obliquely downward to the right forward by the caster angles of the posts 41L and 41R, and the tip end and the connecting nut 62 of the link ball Brg45 do not contact the connecting tool 26 or the rod end Brg25. A fixed length is secured, and a flange is provided on the contact portion side of the long hole 27a of the pitman arm 21 to stabilize the fixing, and the other is the same as the contact surface (flat portion) of the ball portion of the rod end Brg25. The outer diameter is formed so that the inclination angle can be increased.

3 and 4, one end of the rod end Brg25 connected to both ends of the connector 26 is connected to the pitman arm 21 via the connecting collar 22, and the other rod end Brg25 is connected to the diagonally rear position. The arrangement is connected to the member 24. This arrangement is a necessary condition for securing the same inclination angle on the left and right from the vertical state when the vehicle body 1 goes straight. Details will be described later.

5 and 6 show a state in which the handle 11 is steered to the left, the steering shaft 13 is rotated to the left, and the pitman arm 21 is also rotated to the left with the axis of the steering shaft 13 as a base point. The rod end Brg 25 attached to the center of the arm 21 via the connecting collar 22 rotates, the connecting tool 26 is pulled leftward, and the attaching plate 23 of the connecting member 24 connected by the rod end Brg 25 is fixed. The swinging arm 31 on the other side is pulled downward, and the swinging mechanism 3 operates with the axis of the connecting shaft 32C as a base point. As a result, the left side post 41L shown in FIG. FIG. 9 shows a state in which 12 is inclined leftward, the handle 11 and the front wheels 15L and 15R are directed leftward, and the vehicle body 1 is inclined leftward.

FIGS. 7 and 8 show a state in which the steering wheel 11 is steered to the right. When the steering shaft 13 rotates to the right, the pitman arm 21 also rotates to the right with the axis of the steering shaft 13 as a base point. The rod end Brg 25 attached to the center of the arm 21 via the connecting collar 22 rotates to the right, the connecting tool 26 is pushed to the right, and the attachment plate 23 of the connecting member 24 connected by the rod end Brg 25 is fixed. 1 is pushed upward, the swinging mechanism 3 acts with the axis of the connecting shaft 32C as a base point, and the right side post 41R shown in FIG. The handle 11 and the front wheels 15L and 15R facing in the opposite direction to the state shown in FIG. 9 are facing right, and the handle post 12 and the vehicle body 1 are tilted to the right.

The inclination of the vehicle body 1 changes depending on the left and right steering angles of the handle 11, and as the steering angle increases, the inclination angle also increases, but is not proportional but circular movement of the rod end Brg25 connected by the connector 26, The difference in linear motion appears in the distance, and as shown in FIG. 10, as the steering angle increases, the ratio of the inclination angle with respect to the steering angle decreases little by little, and the inclination angle further decreases from around 45 degrees to around 60 degrees. Go.

The steering angle of the front wheels 15L, 15R that can be turned by ordinary people to ride on the three-wheeled bicycle 1, increase the speed in normal driving, and bend against the centrifugal force is from the straight running state to about 45 degrees, and at this time If the inclination angle of the vehicle body 1 is appropriately set according to the passenger, the traveling speed decreases when the steering angle is 45 to 50 degrees. Therefore, it is not necessary to make the inclination angle proportional to the steering angle. After the steering angle of 45 degrees, the inclination angle of the vehicle body 1 becomes gentle, and the vehicle body 1 is not inclined excessively.

10, 11, and FIG. 3, FIG. 5, and FIG. 7, the rod end Brg 25 connected to both ends of the connector 26 of the vehicle body tilting device 2 as viewed from the upper part (plane) of FIG. 24, the operation of the central portion of the rod end Brg25 by the steering of the handle 11 is represented as a locus diagram. In order to set the inclination angle of the vehicle body 1 and the inclination angle to be the same on the left and right, FIG. As shown in FIG. 4, one end of the rod end Brg 25 connected to the left and right ends of the connecting tool 26 is connected to the pitman arm 21 (the turning radius from the axis of the steering shaft 13) and the other rod. This is for setting the operating position of the connecting member 24 to which the end Brg 25 is connected.

10 and 11 show the rod end Brg 25 connected to the right and left of the connector 26 shown in FIG. 4 connected to the pitman arm 21 and the connecting member 24, and the axis 5 of the steering shaft 13 is the starting point. Represents the locus of the center point of each rod end Brg25 in a state in which the pitman arm 21 rotates to the left and right and the rod end Brg25 coupled to the coupling member 24 via the coupling 26 acts in conjunction with each other. Then, with the axis 5 of the steering shaft 13 as a base point, the pitman arm center line 5X (vertical reference line) connects the center of the steering shaft 13 and the center of the rod end Brg25 attached to the pitman arm 21 as shown in FIG. The horizontal reference line 5Y is represented in parallel to the swing arm 31 from side to side with respect to the axis 5 of the steering shaft 13.
The vertical and horizontal reference lines are based on the straight traveling state of the three-wheeled bicycle 1 shown in FIG. 1, and the center point of the rod end Brg25 attached to the pitman arm 21 shown in FIGS. 3 and 4 is the rod shown in FIG. A rod that is represented by an end Brg center 5CC and that connects the center of the rod end Brg25 coupled to both ends of the coupling tool 26 and the axis of the coupling tool 26 is represented by a coupling line 54C and is coupled to the coupling member 24. A state in which the center point of the end Brg 25 is represented as the rod end Brg center 5TC is the basis.

5 and FIG. 6 from the above basic state, the pitman arm 21 is turned to the left by the steering wheel 11 shown in FIG. Pitman arm center line 5X rotates to the left from the position of the rod end Brg center 5CC at the intersection of the line) and the rotation line 51, and the intersection with the rotation line 51 moves to the position of the rod end Brg center 5CL. Accordingly, the connecting line 54C is pulled and moved, and the rod end Brg center 5TC moves to the left along the action line 52 to reach the position of the connecting line 54L and the rod end Brg center 5TL. This state is a state in which the handle post 12 is inclined to the left.

7 and FIG. 8 from the above basic state, the pitman arm 21 is rotated to the right by the steering angle of the handle 11 shown in FIG. Pitman arm center line 5X rotates to the right from the position of the rod end Brg center 5CC at the intersection of the line) and the rotation line 51, and the intersection with the rotation line 51 moves to the position of the rod end Brg center 5CR. Accordingly, the connecting line 54C is pushed and moved to the right, the rod end Brg center 5TC moves to the right along the action line 52, and becomes the position of the connecting line 54R and the rod end Brg center 5TR. This state is a state in which the handle post 12 is inclined to the right.

The movement from the rod end Brg center 5TC to the rod end Brg center 5TL and 5TR shown in FIG. 10 is the action of the rod end Brg25 connected to the connecting member 24 fixed to the swing arm 31. 7, the swing arm 31 swings up and down with the connecting shaft 32C as a base point, and the rod end Brg25 operates vertically and horizontally parallel to the swing arm 31.
Steering of the handle 11 causes the steering shaft 13 to make a circular motion, rotate the rod end Brg 25 of the pitman arm 21 and act on the rod end Brg 25 connected to the connecting member 24 to convert it into a substantially linear motion. The vehicle body 1 is steered to the left.

The inclination angle of the vehicle body 1 shown in FIG. 9 is such that if the distance between the steering axis 5 shown in FIG. 10 and the rod end Brg center 5CC on the pitman arm center line 5X becomes longer, the rod end Brg center The moving distance from 5TC to the rod end Brg center 5TL or 5TR becomes longer and the inclination angle becomes larger. If the distance between the axis 5 of the steering axis and 5CC on the pitman arm center line 5X is shortened, the moving distance from 5TC to 5TL or 5TR is shortened, and the inclination angle is decreased.
Furthermore, the distance from the fixing position of the mounting plate 23 of the connecting member 24 to the connecting position of the rod end Brg 25 at the tip end, and the connecting shaft 32C connecting the central part of the swinging arm 31, is fixed to the swinging arm 31. The position can be changed by changing the distance to the mounting plate 23, and the position can be changed by changing the distances using the long holes 27a, 27b, and 27c shown in FIG. The longitudinal dimensions of the long holes 27a, 27b, 27c shown in FIG. 4 that can be changed can be freely changed as long as the strength of each member can be secured.

Since the connecting member 24 for connecting the rod end Brg 25 is attached to either the left or right of the connecting shaft 32C of the swing arm 31, depending on the attachment position of the connecting member 24 and the rod end Brg 25 connected to the pitman arm 21, the vehicle body 1 10 and 11 will be described with reference to FIGS. 10 and 11 for setting the same tilt angle.

FIG. 10 shows a state in which the pitman arm center line 5X is rotated by left and right rotation angles LΘ and RΘ, and the rotation angles LΘ and RΘ are 60 degrees respectively. Approximately proportional to the angle (the set angle can be changed), and it is the limit that can be bent on the three-wheeled bicycle 1 in a stable manner. In this state, with the rod end Brg center 5CC as a base point, the width of the connecting line 54C An arcuate virtual curve LC is drawn, and an arcuate virtual curve LL is drawn at the connecting line 54L from the position of the rod end Brg center 5CL rotated 60 degrees to the left from the rod end Brg center 5CC. An arcuate virtual curve LR is drawn at the connecting line 54R from the position of the rod end Brg center 5CR rotated 60 degrees to the right from the Brg center 5CC, and an action line 52 parallel to the horizontal reference line 5Y. The intersection of the imaginary curves LL, LC, LR becomes the rod end Brg centers 5TL, 5TC, 5TR, and this position can be moved on the virtual curves LL, LC, LR, but the rod end Brg center 5CC. If the working line distance G only changes, the distance between the left and right rod end Brg centers 5TL and 5TR changes accordingly, and the connection member 24 is connected. Further, the working distance to the left and right of the rod end Brg25 is changed, and the inclination angle of the vehicle body 1 is different between the left and right.

In FIG. 10, the left and right 5TL and 5TR are set at the same interval with respect to the rod end Brg center 5TC, and the inclination angle of the vehicle body 1 is the same. If the action line distance G moves to either longer or shorter, the inclination angle of the vehicle body 1 becomes asymmetrical.
If the dimensions are entered in the drawing of FIG. 10, it can be introduced into the actual machine, and if the size of each part is determined, the inclination angle can be calculated.

FIG. 11 shows a state in which the pitman arm center line 5X is rotated left and right by rotation angles LΘ and RΘ of 30 degrees, and the virtual action line 53 with the same inclination angle of the vehicle body 1 in this state is shown. The distance is the virtual action line distance H. Although slightly longer than the action line distance G, the deviation width between the virtual curves LL and LR is slightly smaller than the virtual curve LC based on the rod end Brg center 5CC as shown in FIG. Even when the distance between the left and right rod end Brg centers 5TL and 5TR with respect to the rod end Brg center 5TC at the intersection with the action line 52 is compared with the virtual action line distance H, the difference is slight. When the interval between the rod end Brg centers 5TL and 5TR is set to be the same with reference to the rod end Brg center 5TC with the setting of the rotation angle 60 degrees shown in FIG. It is not possible to experience the difference in inclination angle.

The steering angle of the front wheels 15L and 15R in the actual machine is an angle (confirmed by the actual machine) that allows the elderly to stably turn up to approximately 50 degrees to the left and right with reference to the straight traveling state, and the vehicle body 1 has the same inclination angle. Therefore, the action line distance G shown in FIG. 10 is closer to the virtual action line distance H, and changes in the virtual curves LL, LC, and LR are reduced. Since the influence on the left / right tilt angle of the vehicle body 1 is further reduced, the right and left rods with the rotation angles LΘ and RΘ set to about 50 degrees and the rod end Brg center 5TC as a reference in the actual vehicle of the tricycle 1 It is desirable to set the connecting member 24 at the action line distance G where the distances between the end Brg centers 5TL and 5TR are the same.

When the three-wheeled bicycle 1 is in the straight traveling state, the rod end Brg 25 connected to the connecting member 24 shown in FIG. 3 has the rod end Brg centers 5TL and 5TR as shown in FIGS. 10 and 11 with reference to the rod end Brg center 5TC. The action line 52 acts to the left and right in parallel with the horizontal reference line 5Y set in parallel with the swing arm 31, and the action line 52 is positioned at the rod end Brg center 5CC connected to the pitman arm 21. It is located between the steering shaft axes 5 and is set at a rear position close to the rod end Brg center 5CC. This positional relationship does not change even if the inclination angle of the vehicle body is changed, and from the horizontal reference line 5Y. Only the action line distance G changes. FIG. 3 and FIG. 4 illustrate the above settings, and a structure in which the rod end Brg25 connected to the connecting member 24 is disposed obliquely behind the rod end Brg25 connected to the pitman arm 21. FIG.

The turning mechanism 4 of the front wheels 15L, 15R is a link ball connected to one end of the connecting rod 46S with a certain distance in front of the rod end Brg25 connected to the pitman arm 21 shown in FIGS. The other end of the connecting rod 46S is connected to the link ball Brg45 connected to the lower end of the knuckle arm 44L fixed to the turning shaft 42L of the side post 41L. One of the plurality of link balls Brg45 connected to the connecting rod 46L is connected to the upper end of the knuckle arm 44L, and the other link ball Brg45 is connected to the lower end of the turning shaft 42R of the side post 41R. The pitman arm 21 is rotated to the left by the left steering of the handle 11, the rod end Brg25 connected to both ends of the connecting tool 26, and the swinging arm swings via the connecting member 24. At the same time, the connecting rod 46S is pushed to the left and the knuckle arm 44L rotates to the left. The connecting rod 46L and the knuckle arm 44R are interlocked to the left and the turning of the front wheels 15L and 15R and the inclination of the vehicle body 1 proceed simultaneously. Then, the front wheels 15L and 15R shown in FIG. 9 turn to the left.

When the front wheels 15L and 15R are turned to the right, the pitman arm 21 is rotated to the right by the right steering of the handle 11, the connecting rod 46S is pulled to the right, and the knuckle arm 44L is rotated to the right. 46L and the knuckle arm 44R are interlocked to the right and the turning of the front wheels 15L and 15R and the inclination of the vehicle body 1 proceed simultaneously, and the front wheels 15L and 15R turn to the right opposite to FIG.

The car body tilting device 2 is characterized by high machining accuracy of the main parts of the link mechanism including the pitman arm 21, the connecting tool 26, the plurality of rod ends Brg 25, and the like, and the play (blur) of the steering wheel is slight and the car body is stabilized. Furthermore, the ratio of the distance to the grip portion of the handle 11 is about seven times longer than the distance to the center of the rod end Brg 25 connected to the pitman arm 21 with respect to the axis of the steering shaft 13, and the link The mechanism is combined with both the action of converting the rotational motion with relatively little resistance to the linear motion, and the resistance applied to the handle 11 at the time of steering is reduced, so that the pitman arm 21 can be easily rotated and the vehicle body 1 can be easily tilted. Become. When a lateral external force is applied to the vehicle body, the reverse action occurs, resistance increases when converting from linear motion to rotational motion, and it is difficult to apply strong rotational force to the handle 11, so the handle 11 of the handle 11 is lightened. If supported, the vehicle body 1 is stable, and even when a strong external force is applied in the lateral direction of the vehicle body 1 when riding on the three-wheeled bicycle 1, the steering wheel is stable so that the vehicle can ride safely. Further, the inclination angle of the vehicle body 1 can be freely adjusted by adjusting the fixing position mainly by the long hole 27a of the pitman arm 21 and by the long groove 27c of the pedestal portion 37 of the swing arm 31 and the long hole 27b of the mounting plate 23. Since it can be changed, it is possible to make the inclination angle according to the physique and exercise ability of the rider, so that the ride can be taken with peace of mind.

Furthermore, the mounting plate 23 fixed to the connecting member 24 shown in FIGS. 2 to 4 can be swung only by mounting on either the left or right side of the swing arm 31 to reduce the number of components. The mounting plate 23 and the pitman arm 21 are metal plate forming parts that do not require relatively high precision and can be easily processed. The rod end Brg 25 and the link ball Brg 45 that require high precision are components of a general machine tool. It is commercially available, has a track record in quality, is inexpensive and reliable, and other parts such as the connecting member 24, the connecting collar 22, the connecting tool 26, etc. are mass-produced as commercially available parts and are available at low cost. Since it is easy, it becomes an optimal component structure for manufacturing the three-wheeled bicycle 1 at a low cost.
The above is the configuration of the first embodiment.

A second embodiment of the vehicle body tilting device during turning of the front two-wheel bicycle will be described in detail below with reference to FIGS.

The existing structure is the same as that of the first embodiment in the second embodiment, and the basic component for inclining the vehicle body 1 is the same as that in the first embodiment. By changing the connection method of the shaped pitman arm 121 and the swing arm 31, the distance between the front two wheels 15L and 15R and the handle post 12 can be set longer.

In the straight traveling state of the three-wheeled bicycle 1, a Brg holder set 123 (bearing set) is attached to the connection fitting 124 fixed to the bearing holder 34 for fixing the rocking bearing 33C shown in FIGS. 12 to 15, and the Brg holder The upper part of the pitman arm 121 that is bent is rotatably connected to the set 123, and the lower part of the pitman arm 121 is disposed forwardly in a state orthogonal to the swinging arm 31, and the upper part of the upper part that is rotatably connected. A rotating arm 125 integral with the pitman arm 121 is provided laterally from the lower side, and a link ball Brg45 is connected to the tip, and the link ball Brg45 is connected to the tip of the connecting arm 126 fixed to the steering shaft 13. It is connected with the rod end Brg25 connected to.

In the pitman arm 121, one end of the rod end Brg 25 connected to both ends of the connector 26 is connected to the lower surface of the front position through a connecting collar 122 at a certain distance from the center of the Brg holder set 123. The other rod end Brg25 is connected to a connecting member 24 fixed at a position on the right side of the connecting shaft 32C of the swing arm 31, and is located obliquely behind the rod end Brg25 connected to the pitman arm 121, By steering the handle 11 of the tricycle 1, the rod end Brg 25 connecting the connecting arm 126 and the rotating arm 125 and the link ball Brg 45 rotate, and the rod end Brg 25 of the pitman arm 121 is rotated via the Brg holder set 123. The swing arm is moved by the action of the rod end Brg 25 on the swing arm 31 side. 1 is a configuration for swinging the.

13 and 14 is a metal plate that is bent in a substantially U shape, has an upper surface fixed to the bearing holder 34, and a Brg holder set 123 in which the pitman arm 121 is connected to the lower surface. Is fixed.

The pitman arm 121 is a substantially U-shaped metal plate as shown in FIGS. 13 to 15, and the upper surface is short and the lower surface is long and bent. The upper surface has a central part with a connecting washer 127 on the Brg holder set 123. Via a bolt 61 and a nut 62, the lower surface is positioned forward and perpendicular to the swing arm 31, and a link ball Brg45 connected to the connecting rod 46S is connected to the upper end of the tip. A central hole is provided with a long hole 27a that can change its position in the front-rear direction with a certain distance from the connecting portion of the Brg holder set 123. The rod end Brg25 is connected to the bolt 61 via the connecting collar 122 and the adjusting washer 28. The structure is such that the steering of the steering wheel 11 and the turning of the front wheels 15L and 15R and the inclination of the vehicle body 1 proceed simultaneously by the nut 62 being connected.

The pitman arm 121 is formed in a substantially U-shaped bent shape of the metal plate shown in FIGS. 13 to 15 by extending the position of the long hole 27a to which the rod end Brg25 is connected in the front-rear direction shown in FIG. It is intended to widen the adjustment range of the inclination angle of the vehicle body 1, and can be connected without contact between the rod end Brg25 and the connection nut 62 of the Brg holder set 123, so that the inclination angle of the vehicle body 1 can be freely changed from about 2 degrees. It is a shape that can be set. However, depending on the setting condition of the inclination angle of the vehicle body 1, it is a flat L-shaped product, and one dimension is long and arranged in the front direction to become the pitman arm 121, and the other is short in dimension and arranged in the lateral direction. It can also be set to be the moving arm 125.

The pivot arm 125 shown in FIGS. 13 to 15 is a lower surface of the pitman arm 121 and has a certain length substantially parallel to the swing arm 31 from the front of the substantially U-shaped bent portion to the left lateral direction. , The tip portion is formed in a semicircular shape, and the link ball Brg45 is connected.
Since the connecting member 24 is fixed to the right side of the connecting shaft 32 </ b> C of the swing arm 31, the rotating arm 125 is provided in the left lateral direction on the opposite side so as not to interfere with each other when rotating.
The rotation arm 125 may be formed by fixing a rectangular part without sticking to the integral formation with the pitman arm 121 as long as the same strength as the pitman arm 121 is secured.

The connection arm 126 shown in FIGS. 13 to 15 is formed in a substantially rectangular shape of a metal plate, and one end is fixed to the lower part of the steering shaft 13 toward the left in a state substantially parallel to the swing arm 31 and the other end. The tip of the part is formed in a semicircular shape, and is connected to a pivot arm 125 and a rod end Brg25 connected to a link ball Brg45.

In the state shown in FIG. 13, the distance between the steering shaft 13 and the Brg holder set 123 is short, so the link ball Brg 45 connected to the rotating arm 125 and the rod end Brg 25 connected to the connecting arm 126 are directly connected. However, when the distance is increased, the support frame 17 is extended forward, and when the side posts 41L and 41R are also disposed forward, the connecting tool for extending between the link ball Brg45 and the rod end Brg25. For example, the coupling distance can be extended by interposing the coupling tool 26, the coupling rod 46S, or the like. Therefore, it is possible to realize a large space for luggage in front of the handle post.

The swing mechanism 3 shown in FIG. 12 to FIG. 15 has a plurality of swing arms 31 that are made of metal and bent in a substantially U-shape, are long to the left and right, and have a plurality of long holes 27 c that can be changed in mounting position. The pedestal portion 37 is provided at the lower right side of the rocking bearing 33C, and a plurality of long holes 27b for enabling the mounting plate 23 fixed to the connecting member 24 to change the position in the front-rear and left-right directions are provided with a plurality of long holes. The swinging bearing 33C is provided in a state orthogonal to 27c, the mounting plate 23 is fixed to the pedestal portion 37 with bolts 61 and nuts 62 via a washer 63, and the center portion is fixed to the bearing holder 34 attached to the frame 17. Are connected to the connecting shafts 32L and 32R of the rocking bearings 33L and 33R fixed to the turning shaft.
The center of the plurality of springs 35 is fixed to the frame 17 at the upper part of the swing arm 31, and the left and right ends are fixed to spring receivers 36 connected to the connecting shafts 32L and 32R of the swing bearings 33L and 33R. The tilting mechanism 31 is interlocked with the swinging of the swinging arm 31 and is configured to maintain an upright posture when the vehicle is idle by the action of the spring 35.

The connecting member 24 is preferably a metal round bar as shown in FIGS. 14 and 15, one end portion is provided with a thread for connecting the rod end Brg 25, and the other end portion is made of metal and has a plurality of long holes. A mounting plate 23 provided with 27b is fixed.
The connecting member 24 can be bent with a metal plate integrated with the mounting plate 23 without being particular about the current method, and the link ball Brg 45 can be connected. If the strength can be secured, the synthetic resin can be integrally molded. Is possible.

12 and 13, the axis of the bolt 61 that connects the pitman arm 121 to the Brg holder set 123 and the axis of the connecting member 24 are set in parallel, and the axis of the bolt 61 that is connected to the Brg holder set 123. Since the axis lines of the turning shafts 42L and 42R are set on the same line, the connecting rod 46S connected to the knuckle arm 44L is set at a right angle to the pitman arm 121 and connects the knuckle arms 44L and 44R. The connecting rod 46L is configured to be connected in parallel with the connecting rod 46S.
The axis of the bolt 61 connected to the Brg holder set 123 and the axis of the turning shafts 42L and 42R do not stick to the setting on the left and right collinear lines, and the setting may be such that the Brg holder set 123 moves back and forth. The same setting as in the first embodiment is required.

14 and FIG. 15, the connector 26 is made of metal and is threaded on both left and right ends to connect the rod end Brg 25, and one rod end Brg 25 is adjusted with the connecting collar 122 at the center of the pitman arm 121. The bolt 61 and the nut 62 are connected through the washer 28, and the other rod end Brg 25 is connected to the connecting member 24 through the adjustment washer 28 with the nut 62. The connector 26 may be a hexagonal long nut (commercially available product).

The connecting collar 122 is a metal cylindrical shape. When the handle 11 is steered to the right, the pitman arm 121 is tilted to the lower right opposite to the state shown in FIGS. 16 and 17 according to the tilted state of the handle post 12. Therefore, a certain length is secured so that the connecting tool 26 and the rod end Brg25 do not contact the tip of the pitman arm 121 or the nut of the link ball Brg45 connected to the tip, and the pitman arm 121 A flange is provided on the contact portion side of the long hole 27a, and the other is formed so that the inclination angle can be increased with the same outer diameter as the contact surface (flat portion) of the ball portion of the rod end Brg25.

One end of the rod end Brg 25 connected to both ends of the connector 26 shown in FIG. 15 is connected to the pitman arm 121 via the connecting collar 122, and the other rod end Brg 25 is connected to the connecting member 24 at an obliquely rearward position. It becomes a connected arrangement. This arrangement is a necessary condition for the vehicle body 1 to ensure the same left and right inclination angles from the vertical state when the vehicle travels straight.

  16 and 17, the steering wheel 11 is steered to the left, the steering shaft 13 is pivoted to the left, the connecting arm 126 and the pivot arm 125 are interlocked and pivoted to the left, and the pitman arm 121 is the Brg holder. The rod end Brg25 connected to the lower surface of the central portion of the pitman arm 121 via the connecting collar 122 rotates leftward with the axis of the set 123 as a base point, and the connecting tool 26 and the rod end Brg25 are rotated to the left. When the connecting member 24 connected in the above is pulled leftward and the swinging arm 31 is pulled downward, the swinging mechanism 3 acts with the connecting shaft 32C as a base point, and the side post 41L moves upward. The handle post 12 is tilted to the left and the handle 11 is steered to the left as shown in FIG. 18 so that the front wheels 15L and 15R face left and the vehicle body 1 tilts to the left.

The inclination of the vehicle body 1 changes depending on the steering angle of the handle 11, and the inclination angle increases as the steering angle increases. However, the inclination of the vehicle body 1 is not proportional, but is circular and linear movement of the rod end Brg25 connected by the connecting nut 26. As the steering angle increases as shown in FIG. 10, the ratio of the inclination angle slightly decreases with respect to the steering angle, and the inclination angle further decreases from around 45 degrees to around 60 degrees.

When the steering wheel 11 is steered to the right, the pitman arm 121 rotates to the right, the connecting member 24 connected to the connecting tool 26 and the rod end Brg 25 is pushed rightward, and the swing arm 31 is pushed upward. Other than the operation, the operation changes from the left-facing operation to the right-hand operation, and changes from the left-facing state to the right-facing state shown in FIG.

The steering angle of the front wheels 15L and 15R that can be turned by ordinary people to ride on the three-wheeled bicycle 1, increase the speed in normal driving, and bend against the centrifugal force is up to about 45 degrees. If the steering angle is appropriately set according to the rider, the traveling speed decreases when the steering angle is 45 to 50 degrees. Therefore, it is not necessary to make the inclination angle proportional to the steering angle. After 45 degrees, the inclination angle of the vehicle body 1 becomes gentle, and the vehicle body 1 is not inclined excessively, so that the three-wheeled bicycle 1 can be turned around while riding. This structure is the same as long as the distance between the front wheels 15L and 15R and the handle post 12 is within the standard range of a normal bicycle (total length 190Cm and width 60Cm or less).

Since the inclination angle and the inclination angle of the vehicle body 1 are the same on the left and right, one of the rod ends Brg 25 connected to both ends of the connecting tool 26 shown in FIGS. 14 and 15 has a connecting collar 122 on the pitman arm 121. In order to set the positional relationship between the position connected via the connecting rod 24 and the connecting member 24 connected to the other rod end Brg 25, the base point to be set is from the axis of the steering axis to the axis of the bearing of the Brg holder set 123. The rest is the same as the paragraphs [0035] to [0046] in the description mainly based on the locus diagrams of FIGS. 10 and 11 of the first embodiment.

12, 13, and 18, the turning mechanism 4 of the front wheels 15 </ b> L and 15 </ b> R is connected to both ends of the connecting rod 46 </ b> S from the connecting portion of the rod end Brg 25 of the pitman arm 121 to the front end portion having a certain distance forward. One of the link balls Brg45 connected to the other end is connected, the other is connected to the lower end of the knuckle arm 44L fixed to the turning shaft 42L of the side post 41L, and the upper end of the knuckle arm 44L has both ends of the connecting rod 46L. One of the link balls Brg45 connected to the other end is connected, and the other is connected to the upper end of the knuckle arm 44R fixed to the turning shaft 42R of the side post 41R. And the rod end B connected to both ends thereof by the rotation of the pitman arm 121. At the same time, the connecting rod 46S is pushed to the left and the knuckle arm 44L rotates to the left, and the connecting rod 46L and the knuckle arm 44R are interlocked. The turning of the front wheels 15L and 15R and the tilt of the vehicle body 1 proceed simultaneously, the front wheels 15L and 15R turn to the left, and the vehicle body 1 tilts to the left.

A line connecting the center of the steering shaft 13 and the center of the link ball Brg45 connected to the tip of the pitman arm 121, the center of the link ball Brg45 connected to the lower tip of the knuckle arm 44L, and the turning shaft 42L. The connecting rods 46S and 46L are parallel and arranged perpendicular to the center line of the pitman arm 121 and connected by a plurality of link balls Brg45. The device which acts is made.

The car body tilting device 2 is characterized in that the main parts used in the link mechanism, the Brg holder set 123, the plurality of rod ends Brg25, and the plurality of link balls Brg45, have high processing accuracy and little play (blur) of the handle. The vehicle body 1 is stable, and further, the distance from the axis of the steering shaft 13 to the grip portion of the handle 11 with respect to the center of the rod end Brg 25 connected to the pitman arm 121 and the axis of the Brg holder set 123 is The ratio is as long as about 7 times, and the link mechanism is combined with the action of converting the rotational motion with relatively little resistance to the linear motion, so that the resistance applied to the handle 11 is reduced and the pitman arm 21 can be easily rotated. This makes it easier to tilt the vehicle body 1. When a lateral external force is applied to the vehicle body 1, the resistance increases when converting from linear motion to rotational motion due to the reverse action, and it is difficult to apply strong rotational force to the handle 11. If the vehicle is lightly supported, the vehicle body 1 is stable, and even when a strong external force is applied in the lateral direction of the vehicle body 1 when riding on the three-wheeled bicycle 1, the steering wheel 11 is stable so that the vehicle can ride safely. Further, the inclination angle of the vehicle body 1 can be freely adjusted by adjusting the fixing position mainly by the long hole 27a of the pitman arm 121 and by the long groove 27c of the pedestal portion 37 of the swing arm 31 and the long hole 27b of the mounting plate 23. Since it can be changed, it is possible to make the inclination angle according to the physique and exercise ability of the rider, so that the ride can be taken with peace of mind.

The mounting plate 23 fixed to the connecting member 24 shown in FIGS. 13 to 15 is fixed to one of the left and right sides of the swing arm 31 so that the swing arm 31 swings up and down. And the connecting interval between the rod end Brg25 and the link ball Brg45 connected to the connecting arm 126 and the rotating arm 125 can be freely changed, so that the size of the support frame 17 can be changed back and forth so that the handle post 12 and the front wheels 15L and 15R can be freely changed back and forth, and a large luggage space and a space for a child seat can be secured in front of the handle post 12 with a margin.

Further, the components constituting the vehicle body tilting device 2 are a metal plate forming component that does not require relatively high accuracy, and the mounting plate 23, the connecting bracket 124, the connecting arm 126, the pitman arm 121 and the rotating arm 125 are easily processed. Yes, the rod end Brg25, link ball Brg45, and Brg holder set 123 that require high accuracy are commercially available as components of general machine tools, and have been proven for many years. The member 24, the connecting collar 122, the connecting tool 26 and the like are mass-produced as commercially available parts, and are inexpensive and easy to obtain. Therefore, the parts configuration suitable for manufacturing the three-wheeled bicycle 1 at a low cost Become.
The above is the configuration of the second embodiment.

The vehicle body tilting device 2 described above is configured based on the three-wheeled bicycle 1 invented by the present applicant in both of the first and second embodiments, but does not use the spring 35 for maintaining the upright posture, and the link mechanism. The side posts 41L and 41R can be supported up and down, and if the structure can swing, only the vehicle body tilting device 2 can be used to mechanically control the three-wheeled bicycle 1 by steering the handle 11 without the upright posture holding mechanism. If the steering wheel 11 can be tilted and the handle 11 is lightly supported, the upright posture can be maintained in a straight traveling state, and the steering body 11 can be steered to return the inclined state of the vehicle body 1 to an upright posture. Can keep.

The vehicle body tilting device 2 is configured at the lower part of the swing arm 31, but the action line of the rod end Brg 25 connected to the connecting member 24 behind the rod end Brg 25 connected to the pitman arm 21 or the pitman arm 121. If it is possible to secure the position of the swaying arm 31, the structure of the support frame 17 fixed to the handle post 12 can be changed to configure the upper part of the swing arm 31.

Although the above has been described as the front two-wheeled three-wheeled bicycle 1, if the front two-wheel can be steered without being caught by the three-wheeled bicycle 1, the rear two-wheeled four-wheeled bicycle and the bicycle such as the electric assist also constitute the vehicle body tilting device 2. It is possible.

Although the embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

1 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Tricycle (Body)
11 ... Handle 12 ... Handle post 13 ... Steering shaft 14 ... ... Steering bearings 15L, 15R ... Front wheel 16 ... Rear wheel
17 ·································································································································· Pitman arms 22, 122 Connection collar 23 ... Mounting plate 24 ... Connection member 25 ... Rod end Brg (universal joint)
26 ············· Connectors 27a, 27b, 27c ... Long hole 28 ············· Adjusting washer 3 ······· .... Oscillation mechanism
31 ... swing arm 32L, 32C, 32R ... connecting shaft 33L, 33C, 33R ... swing bearing 34 ... Bearing holder 35 ···································································································· ......... Turning mechanism 41L, 41R .... Side posts 42L, 42R ... ... Turning shafts 43L, 43R ... ... Turning bearings 44L, 44R .... Knuckle arm 45 ..... Link ball Brg (universal joint)
46S, 46L ················································································· Reference line)
5Y ·········· Horizontal reference lines 5CL, 5CC, 5CR ... Rod end Brg center
5TL, 5TC, 5TR ・ ・ ・ Rod end Brg center 51 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Rotation line 52 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Action line 53 ・ ・ ・ ・ ・ ・... Virtual action lines 54L, 54C, 54R ... Connection lines LL, LC, LR ... Virtual curves LΘ, RΘ ... Turning angle G ...・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Action line distance H ・ ・ ・ ・ ・ ・ ・ ・ Virtual action line distance 61 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Bolt 62 ・ ・ ・・ ・ ・ ・ ・ ・ ・ ・ ・ Nut 63 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Washer 123 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Brg holder set
124 ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ ・ Connection fitting
125 ··········· Rotating arm 126 ···············································

Claims (5)

Steering with two front wheels, the bicycle body can be tilted left and right, and the pitman arm is fixed to the steering shaft built in the handle post and fixed to the front in a state orthogonal to the swing arm. One of the universal joints connected to both ends of the tool is connected to the pitman arm at a predetermined distance from the steering shaft at a front position via a connection collar, and the other universal joint is connected to the swing joint. Connected to a connecting member fixed to either the right or left side of the swing fulcrum of the moving arm, and the action line of the universal joint connected to the connecting member is connected to the pitman arm. A vehicle body tilting device for turning a front two-wheeled bicycle characterized by a structure located behind the joint. Steering with two front wheels, and in a straight traveling state where the vehicle body can tilt left and right, the pitman arm is orthogonal to the swing arm in a bearing set fixed to the swing bearing holder in the center of the swing arm And a pivoting arm is provided in a lateral direction from the coupled portion in a direction substantially parallel to the swing arm, and one of a plurality of universal joints coupled to both ends of a coupling tool is The pitman arm is connected to the front position through a connecting collar at a certain distance from the center of the bearing set, and the other universal joint is on the right side or the left side of the swing fulcrum of the swing arm. Connected to a connecting member fixed at any one of the positions, the line of action of the universal joint connected to the connecting member is located behind the universal joint connected to the pitman arm, Universal joints And the other universal joint is connected to the tip of the connecting arm fixed substantially parallel to the turning arm of the steering post of the handle post. Body tilting device for turning a front two-wheeled bicycle characterized by the above structure. The connecting position of the universal joint connected to the pitman arm, the size of the connecting member fixed to the swing arm, the fixing position, and the size of the connecting tool for connecting the plurality of universal joints at both ends can be freely set. The front two wheels according to claim 1 or 2, characterized in that the front two wheels can be changed, and the structure allows the vehicle body to be tilted at the same inclination angle from the vertical state to the left and right, and the vehicle body inclination angle to be freely changed. Body tilting device when turning a bicycle. One end of the universal joint connected to both ends of a short-size connecting rod is connected to the tip of the pitman arm with a certain distance forward from the universal joint connected to the pitman arm, and the other A universal joint is connected to one of the left and right front ends of a knuckle arm fixed to the turning shafts of the two front wheels, and a plurality of universal joints connected to both ends of a long-sized connecting rod are used to connect the left and right knuckle arms. The front two-wheel bicycle turning according to any one of claims 1 to 3, wherein the front end portions are connected to each other so that the turning of the two front wheels and the inclination of the vehicle body proceed simultaneously. Body tilt device. The universal joint connected to the rotating arm and the connection arm connected to the front and rear of the support frame fixed to the front of the handlebar of the bicycle and the side post supporting the two front wheels. The vehicle body tilting device for turning a front two-wheel bicycle according to claim 2, wherein a connecting interval between the universal joints connected to each other can be freely changed.

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