JPS60176874A - Generator for restoring force of rocking type tricycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a restoring force generating device for a rocking tricycle in which a front vehicle body and a rear vehicle body are pivotally connected.

(Prior art) A front vehicle body that supports one front wheel and a rear vehicle body that supports two rear wheels are swingably connected on the left-right center line of the vehicle body, and when the front vehicle body swings and tilts in the left-right direction, In a restoring force generating device for a rocking tricycle in which an elastic member is interposed between the front and rear bodies to restore the front body to a neutral position, a device for changing the restoring force characteristics of the elastic member in stages was developed in 1973. -4238
3 is known, but the one of Japanese Patent Publication No. 51-42383 simply changes the restoring force characteristics based on the set inclination angle of the front vehicle body to the left and right, and adjusts the strength of the restoring force. It has no structure. Therefore, in the past, it was not possible to adjust the restoring force according to the passenger's weight or live load, or according to the passenger's preference, which was extremely inconvenient.

(Object of the Invention) The present invention has been devised in view of the above circumstances, and the object of the present invention is to generate a restoring force of a rocking tricycle that can adjust the restoring force to a desired strength. We are in the process of providing equipment.

(Structure of the Invention) In order to achieve the above object, the present invention is characterized in that the elastic member interposed between the front and rear vehicle bodies is provided with an adjustment mechanism that can freely adjust the initial setting value of the elastic restoring force. .

(Embodiment) A preferred embodiment of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 is a left side view of the rocking tricycle, Fig. 2 is a sectional view of the elastic member, and Fig. 3 is a diagram showing the relationship between the front and rear vehicle bodies and the elastic member when turning left and right as seen from the rear of the vehicle body. .

The rocking tricycle (1) includes a front body (2) and a rear body (3), and a helad tube (4) is provided at the front of the front body (2) to form a steering wheel for the -wheel. A front wheel (5) is supported by a front fork (6) inserted into a head tube (4), and a handle (7) and a headlight unit (8) are attached to the negative end of the front fork (6).

A seat boss (11) is provided at the rear of the front vehicle body (2) diagonally upward, a seat (12) is provided at the upper end of the seat post (11), and a seat boss (11) is provided at the upper end of the seat post (11). Attach the bracket (13) toward the rear of the front body (2) and the joint case (14) toward the rear near the lower end of the seat boss (+1).

The joint case (14) has a shirt that can be rotated freely.
(15) is attached, the shaft (15) is extended rearward, and the axis (16) of (15) is the tricycle (1).
When viewed from above, the left and right center of the front body (2) and the rear body (
3), and fix the bracket (17) to the rear end of the shaft (15). 6. The rear body (3) has the lower front end attached to the platform (21) and fixed to the platen (17). , the bracket (17)
A rear fork (23) whose front end is pivotally supported by a pivot shaft (22) installed horizontally on the rear fork (23) and extends rearward, and an engine (24) is installed at the rear end of the rear fork (23). The two rear wheels (2B) and (2B) arranged on the left and right sides are driven by a power unit (25), and the power unit is driven by a cushion unit (27) installed between the loading platform (21) and the power unit (25). (2
5) and the rear two wheels (2B), (2B) are suspended and supported,
Therefore, if we consider the rear body (3) as fixed, then the front body (2)
is rotatable around the shaft (15), and if the front body (2) is fixed, the power unit (25)
and the rear two wheels (2B), (2B) are vertically swingable around the pivot shaft (22), and in the embodiment, the shaft (15
) and the rear body (3) are fixed, so the shaft (15)
forms part of the vehicle body (3).

(31) is a restoring force generating device; restoring force generating device (31)
In the embodiment, is provided between the bracket (13) attached to the seat post (12) and the shaft (15),
The restoring force generating device (31) includes an elastic member (33) to which a restoring force adjusting mechanism (32) is attached.

The elastic member (33) has a cylindrical portion (41) as shown in FIG.
), and a lower member (43) whose upper part is inserted into the cylindrical part (41), and the lower member (43) is slidably fitted into the cylindrical part (41). equipped piston (44
) and a rod (4) extending downward from the piston (44).
5), a threaded member (51) is screwed onto the bottom (46) of the cylindrical portion (41), and a center guide hole (
52), the lower part of the rod (45) projects downward, and mounting parts (53) and (54) are formed at the L end of the cylindrical part (41) and the lower end of the rod (45), respectively.

The upper end of the threaded member (51) faces into the cylindrical portion (41), a spring receiver (81) is provided at the upper end, and the piston (44)
A main coil spring (64) is located between the base (83) of the spring holder (62) arranged on the lower surface side of the spring holder (81) and the spring holder (81).
A sub-coil spring (66) is installed between the lower surface of the piston (44) and the stepped portion (65) of the spring receiver (62), and the screw member (51), the spring receiver (81L (62),
A restoring force adjustment mechanism (32) that allows variable adjustment of the spring constant of the elastic member (33) using a sub-coil spring (68) etc.
) is configured.

The left half of Fig. 2 shows the state in which the screw member (51) is pulled out from the bottom (4B) to the maximum extent, and in this state, the spring receiver (82) is attached to the upper end of the main coil spring (60) by the sub coil spring (66). On the other hand, the main coil spring (64) has a higher spring constant than the sub coil spring (66), so it has a substantially free length, and there is a gap (L) between the upper end of the main coil spring (64) and the lower surface of the piston (44).
) is ensured, and in this state the elastic member (33) does not try to shrink or expand in its overall length.

The right half of FIG. 2 shows a state in which the spring member (51) is pushed into the bottom part (46) as much as possible, and in this state, the sub coil spring (86) is compressed, while the main coil spring (64) is - One end of the elastic member (33) comes into contact with the lower surface of the piston (44) and is compressed, so that the elastic member (33) is urged to expand its entire length by the compression reaction force of the main coil spring (64).

The elastic member (33) has an elastic member axis (71) located at the left-right center -H of the front and rear bodies (2) and (3) when the tricycle (1) is viewed from above, and an axial center when viewed from the side. (71) are arranged so as to stand up with respect to the shaft axis (16), and in the embodiment they are substantially orthogonal to each other, but both axes (71) and (1
The angle at which B) intersects is arbitrary, and in short, it does not have to be parallel.

The elastic member (33) is attached to the vehicle body by attaching the upper member (4) to the vehicle body.
The mounting part (53) of 2) and the mounting piece (72) provided on the bracket (13) are pivotally connected via the support shaft (73), and the joint case (14) on the shaft (15) and the bracket ( 17) Mounting piece (74) provided in the area facing between
This is done by pivotally connecting the mounting portion (54) of the lower member (43) to the mounting portion (54) of the lower member (43) via a support shaft (75).

The lower support shaft (75) is deviated (e) with respect to the shaft axis (16) so that the elastic member (33) generates a restoring force as the front vehicle body (2) swings from side to side. . That is, for example, when the front vehicle body (2) swings to the left as shown in the schematic diagram in FIG. 3, the support shaft (73) at the l end of the elastic member (33) is Shaft axis center (16
) to the left with a radius (R) centered at , (r) central difference (
Due to e), the elastic member (33) is expanded against the elastic force of the main coil spring (64), while the main coil spring (84) is compressed, and the compression reaction force of the main coil spring (64) is This generates a restoring force that returns the front vehicle body (2) to a neutral state. In the embodiment, as the inclination of the front vehicle body (2) increases, the amount of compression of the coil spring (64) increases in a quadratic manner, so that the elastic member (33) exhibits a progressive effect.

In addition, the two lower support shafts (73) of the elastic member (33), (
75) is parallel to the axis (18) of the shaft (15),
The left and right rocking of the elastic member (33) accompanying the left and right rocking of the front vehicle body (2) is smoothed.

Next, to explain the effects of the embodiment, first, as shown in the left half of FIG.
6) If you pull out as much as possible from the main coil spring (
64) has a free length, and the main coil spring (8
4) Since a gap (L) is secured between the -h end and the lower surface of the piston (44), although there is an elastic reaction force of the sub-coil spring (66), the elastic member (33) is within the gap (L). Therefore, the restoring force can be set to zero.

In this case, especially when the tricycle (1) is provided with two restoring force generating devices, it is convenient because only one of the restoring force generating devices can be operated. For example, joint case (14
), and when the Neidhardt mechanism (81) and the shaft (15) are connected, when the driver wishes to operate only the Neidhardt mechanism (81), the screw member ( 51) to the bottom of the upper member (4B)
It is best to adjust it so that it is extracted as much as possible.

Next, when the screw member (51) is adjusted to push it into the upper member bottom (46), the sub coil spring (66) is compressed, and the gap ( L) gradually decreases, so that a restoring force can only be generated when the front vehicle body (2) swings to the left or right by a predetermined angle, and this angle can also be conveniently set arbitrarily by adjusting the screw member (51). It is.

Furthermore, in this case as well, if the tricycle (1) is provided with two restoring force generating devices (31), (at), one of the restoring force generating devices (81) will be activated when traveling straight by adjusting the screw member (51). When the front vehicle body (2) swings to the left or right by a predetermined angle during a left-right turn, both restoring generators (31), (
81), which is convenient.

Next, attach the upper end of the main coil spring (64) to the piston (
44) If the screw member (51) is pushed into the bottom of the upper member (46) so as to contact the lower surface, it will be restored by the elastic member (33) as the front vehicle body (2) swings from side to side, similar to a normal restoring force generating device. It can generate force. In addition, as the screw member (51) is pushed in, the main coil spring (64) is compressed, so the restoring force can be gradually increased, as shown in the right half of FIG. ) is pushed in as much as possible to maximize the restoring force, making it possible and convenient to use the swinging tricycle (1) as a fixed tricycle. Therefore, for example, when a heavy object is loaded on the rear body (3), it is convenient to increase the restoring force and set it like a fixed tricycle so that the driver can easily sense the left and right movement of the rear body (3). In this case as well, the tricycle (1) is equipped with two restoring force generators (31) and (81) as described above.
It is convenient to set the restoring force extremely high.

The restoring force adjustment mechanism (32) is not limited to the structure of the embodiment, but may be any structure as long as it can adjust the set value of the restoring force to a desired value, and in the embodiment, the elastic member is Although the present invention is applied to a restoring force generating device of the type that obtains restoring force by elastically deforming in the horizontal direction, the restoring force generating device to which the present invention can be applied is not limited to the structure of the embodiments, and any structure can be used. For example, it may be applied to a Neidhardt mechanism.

(Effects of the Invention) As is clear from the following explanation, according to the present invention, the restoring force of the rocking tricycle can be adjusted to a desired value according to the weight and payload of the occupant, or the preference of the occupant. The present invention is convenient and can significantly increase the practical value of the rocking tricycle, and if the present invention is applied to a rocking tricycle equipped with a plurality of restoring force generating devices, various restoring forces can be generated by adjusting the restoring force. It exhibits excellent effects such as being able to obtain special characteristics.

[Brief explanation of drawings]

FIG. 1 is a left side view of the rocking tricycle, FIG. 2 is a sectional view of the elastic member, and FIG. 3 is a diagram showing the relationship between the front and rear vehicle bodies and the elastic member when turning from side to side as seen from the rear of the vehicle body. In the drawing, (2) is the front body, (3) is the rear body, (5) is the front wheel, (26) is the rear wheel, (15) is the shaft, (31)
is a restoring force generator, (32) is an adjustment mechanism, and (33) is an elastic member. Patent applicant Honda Motor Co., Ltd. agent Patent attorney 2 1) Yong - Immediate question Patent attorney Kuni Ohashi Otoma Patent attorney Yu Koyama

Claims (1)

[Claims] The front body, which supports one front wheel, and the rear body, which supports two rear wheels, are connected so as to be able to swing freely on the left and right center line of the body, and when the body is tilted and tilted, the elastic member interposed between the front and rear body In a restoring force generator for a rocking tricycle configured to restore the front vehicle body to a neutral position using elastic restoring force, an adjustment mechanism is attached to the elastic member to freely adjust the initial setting value of the elastic restoring force. A restoring force generating device for a rocking tricycle, which is characterized by: