JP2023011120A - Multi-wheel type vehicle - Google Patents

Abstract

To provide a multi-wheel type vehicle capable of stabilizing behaviors of a vehicle body when an impact force is input from one of a plurality of wheels.SOLUTION: A multi-wheel type vehicle 1 includes: a frame 5; a swing arm 6 at which one end part 6a side is supported on the frame 5; a wheel 4 fitted on the other end part 6b of the swing arm 6; and interlocking means 7 interlocking a tilting motion of the swing arm 6. The wheel 4 includes a first wheel 4A and a second wheel 4B arranged in the horizontal direction. The swing arm 6 includes a first swing arm 6A on which the first wheel 4A is fitted and a second swing arm 6B on which the second wheel 4B is fitted. The interlocking means 7 includes an interlocking member 8 for interlocking the first swing arm 6A and the second swing arm 6B to be vertically staggered. The interlocking member 8 has a first impact absorbing part 9A absorbing an impact force input from the first wheel 4A and a second impact absorbing part 9B absorbing an impact force input from the second wheel 4B.SELECTED DRAWING: Figure 7

Description

The present invention relates to a multi-wheeled vehicle having a plurality of wheels on at least one of front wheels and rear wheels.

2. Description of the Related Art Conventionally, multi-wheeled vehicles are known in which at least one of front wheels and rear wheels is provided with a plurality of wheels. For example, Patent Literature 1 below describes a multi-wheeled vehicle in which turning performance and steering stability are improved by interlocking swing arms to which a plurality of wheels are respectively mounted. A multi-wheeled vehicle has been proposed that suppresses the overturning of the vehicle body.

JP 2018-199469 A

The multi-wheeled vehicle of Patent Document 1 absorbs the impact force input from the wheels by supporting a direction changing member that interlocks the left and right swing arms with a suspension. However, even in the multi-wheeled vehicle of Patent Document 1, further improvements are made to the behavior of the vehicle body when an impact force is input from one of the plurality of wheels, such as when one of the left and right wheels runs over a step. There was a request for

SUMMARY OF THE INVENTION The present invention has been devised in view of the actual situation as described above, and its main object is to provide a multi-wheeled vehicle capable of stabilizing the behavior of the vehicle body when an impact force is input from one of a plurality of wheels. and

The present invention relates to a multi-wheeled vehicle having a plurality of wheels on at least one of front wheels and rear wheels, wherein a frame is supported on the same axis of the frame at one end and the other end extends vertically. A pair of tiltable swing arms, the wheels mounted on the other end sides of the swing arms, and interlocking means for interlocking the tilting motion of the swing arms, wherein the wheels are arranged in the lateral direction of the frame. a first wheel arranged on one side of the frame and a second wheel arranged on the other side in the left-right direction of the frame, wherein the swing arm comprises a first swing arm to which the first wheel is mounted; a second swing arm to which the second wheel is mounted, and the interlocking means comprises a connecting member for vertically interlocking the tilting motion of the first swing arm and the tilting motion of the second swing arm. wherein the connecting member has a first impact absorbing portion that absorbs impact force input from the first wheel, and a second impact absorbing portion that absorbs impact force input from the second wheel. Characterized by

In the multi-wheeled vehicle of the present invention, the connecting member includes a first connecting portion connected to the first swing arm, a second connecting portion connected to the second swing arm, and the first connecting portion. It is preferable that the first impact absorbing portion and the second impact absorbing portion are provided in the connecting portion.

In the multi-wheeled vehicle of the present invention, the connecting portion has a case that is rotatable with respect to the first connecting portion and the second connecting portion, and the case has an end on the first connecting portion side. The first shock absorbing portion includes a first end portion which is a portion and a second end portion which is an end portion on the side of the second connecting portion, and a male screw is formed around the rotation center of the case. a first shaft, a first nut formed with a female thread corresponding to the first shaft and rotating in synchronism with the case, and a first nut disposed between the first nut and the first end The second shock absorbing portion includes a second shaft having a male screw formed around the rotation center of the case, and a female screw corresponding to the second shaft. and a second spring disposed between said second nut and said second end.

In the multi-wheeled vehicle of the present invention, it is preferable that the first shaft and the second shaft are arranged on the same axis and have opposite threads.

In the multi-wheeled vehicle of the present invention, the inner peripheral surface of the case is formed with at least one groove extending along the first axis and the second axis, and the first nut and the second nut are , each having a convex portion disposed in said groove.

In the multi-wheeled vehicle of the present invention, the interlocking means includes a direction changing member that changes the moving direction of the connecting member, and the first shock absorbing portion is provided between the first swing arm and the direction changing member. and the second shock absorbing portion is preferably provided between the second swing arm and the direction changing member.

In the multi-wheeled vehicle of the present invention, the interlocking means includes a first cylinder for tilting the first swing arm and a second cylinder for tilting the second swing arm, and the connecting member is , a fluid passage connecting said first cylinder and said second cylinder.

In the multi-wheeled vehicle of the present invention, it is preferable that the first impact absorbing portion and the second impact absorbing portion are provided between the first cylinder and the second cylinder.

In the multi-wheeled vehicle of the present invention, the interlocking means includes a lock mechanism for stopping the interlocking of the tilting motion of the swing arm, and the first shock absorbing portion and the second shock absorbing portion each have the lock mechanism. is operating, it is desirable to absorb impact forces from the first wheel and the second wheel.

In the multi-wheeled vehicle of the present invention, it is preferable that the front wheel is one wheel and the rear wheels are three wheels including the first wheel, the second wheel and a center wheel.

In the multi-wheeled vehicle of the present invention, the connecting member includes a first impact absorbing portion that absorbs impact force input from the first wheel and a second impact absorbing portion that absorbs impact force input from the second wheel. , the behavior of the vehicle body can be stabilized even when one of the first wheel and the second wheel runs over a step.

1 is a perspective view showing an embodiment of a multi-wheeled vehicle of the present invention; FIG. FIG. 2 is a side view of the multi-wheeled vehicle of FIG. 1; FIG. 2 is a bottom view of the multi-wheeled vehicle of FIG. 1; FIG. 5 is a conceptual diagram showing the effect of the interlocking means when traveling on a horizontal slope; FIG. 4 is a conceptual diagram showing the effect of the interlocking means during turning; FIG. 11 is a conceptual diagram showing the effect of the interlocking means when the first wheel runs over a step; It is a perspective view which shows notionally an interlocking means. 4 is a cross-sectional view of a connecting portion; FIG. FIG. 9 is a cross-sectional view taken along line AA of FIG. 8; It is a perspective view which shows notionally the interlocking means of other embodiment. FIG. 11 is a side view of a multi-wheeled vehicle of another embodiment; FIG. 12 is a bottom view of the multi-wheeled vehicle of FIG. 11; 12 is a sectional view conceptually showing the interlocking means of FIG. 11; FIG.

An embodiment of the present invention will be described in detail below with reference to the drawings.
FIG. 1 is a perspective view showing a multi-wheeled vehicle 1 of this embodiment. 2 is a side view of the multi-wheeled vehicle 1 of FIG. 1, and FIG. 3 is a bottom view of the multi-wheeled vehicle 1 of FIG. As shown in FIGS. 1 to 3, the multi-wheeled vehicle 1 of this embodiment has a plurality of wheels 4 on at least one of the front wheels 2 and the rear wheels 3 . In this embodiment, the multi-wheeled vehicle 1 in which the rear wheels 3 are provided with three wheels 4 is exemplified, but the multi-wheeled vehicle 1 is not limited to such an aspect. The multi-wheeled vehicle 1 may have, for example, two rear wheels 3 and two or three front wheels 2 .

The multi-wheeled vehicle 1 of this embodiment includes a frame 5, a pair of swing arms 6 whose one end 6a is supported by the frame 5 and whose other end 6b is vertically tiltable, and the other end of the swing arms 6. A wheel 4 mounted on the 6b side is provided. The one ends 6a of the pair of swing arms 6 are desirably supported on the same axis a1. Thereby, the swing arm 6 is tiltable about the axis a1.

FIG. 4 is a conceptual diagram showing the effect of the interlocking means 7 during running on a horizontal slope, and FIG. 5 is a conceptual diagram showing the effect of the interlocking means 7 during cornering. As shown in FIGS. 4 and 5, the multi-wheeled vehicle 1 of this embodiment includes interlocking means 7 for interlocking the tilting motion of the swing arm 6 . Such an interlocking means 7 can alternately interlock the tilting motions of the pair of swing arms 6 in the vertical direction. 4 ground pressure can be maintained evenly.

The wheels 4 include, for example, a first wheel 4A arranged on one side of the frame 5 in the left-right direction and a second wheel 4B arranged on the other side of the frame 5 in the left-right direction. The wheels 4 may include, for example, a central wheel 4C arranged between the first wheel 4A and the second wheel 4B. The swing arm 6 includes, for example, a first swing arm 6A to which the first wheel 4A is attached and a second swing arm 6B to which the second wheel 4B is attached. The central wheel 4C is desirably mounted on the frame 5. As shown in FIG.

The interlocking means 7 of the present embodiment includes a connecting member 8 for alternately interlocking the tilting motion of the first swing arm 6A and the tilting motion of the second swing arm 6B. The connecting member 8 of this embodiment includes a first shock absorbing portion 9A that absorbs the impact force input from the first wheel 4A and a second shock absorbing portion 9B that absorbs the impact force input from the second wheel 4B. have.

FIG. 6 is a conceptual diagram showing the effect of the interlocking means 7 when the first wheel 4A runs over a step. As shown in FIG. 6, in the multi-wheeled vehicle 1, for example, when the first wheel 4A runs over a step and an impact force is input from the first wheel 4A, the first impact absorbing portion 9A is not connected to the connecting member. It absorbs the movement of 8. In such a multi-wheeled vehicle 1, even if one of the first wheels 4A or the second wheels 4B runs over a step, the vehicle body will not be affected when an impact force is input from one of the first wheels 4A or the second wheels 4B. behavior can be stabilized.

As shown in FIGS. 1 and 2, as a more preferred embodiment, the multi-wheeled vehicle 1 comprises a handlebar 10, a saddle 11 and a pair of pedals 12 attached to the frame 5. As shown in FIG. A steering wheel 10 of this embodiment is attached to the front end of the frame 5 via a steering shaft 13 and supports the front wheels 2 so as to be steerable.

The saddle 11 and the pedals 12 are desirably attached near the center of the frame 5 in the longitudinal direction. The multi-wheeled vehicle 1 may be, for example, an electrically assisted type including a motor (not shown) that assists the pedal effort input from the pedals 12 . Such a multi-wheeled vehicle 1 can be operated with the same feeling as a normal bicycle, and is easy to handle.

FIG. 7 is a perspective view conceptually showing the interlocking means 7. As shown in FIG. In FIG. 7, illustration of the central wheel 4C is omitted. As shown in FIG. 7, the connecting member 8 includes a first connecting portion 14A connected to the first swing arm 6A and a second connecting portion 14B connected to the second swing arm 6B. The connecting member 8 of this embodiment includes a connecting portion 15 that connects the first connecting portion 14A and the second connecting portion 14B.

The first shock absorbing portion 9A and the second shock absorbing portion 9B of the present embodiment are provided in the connecting portion 15. As shown in FIG. The first connecting portion 14A is desirably connected to the first impact absorbing portion 9A. The second connecting portion 14B is desirably connected to the second impact absorbing portion 9B. Thereby, longitudinal movements of the first connecting portion 14A and the second connecting portion 14B can be absorbed by the first impact absorbing portion 9A and the second impact absorbing portion 9B, respectively.

As shown in FIGS. 4 and 5, the interlocking means 7 moves the first swing arm 6A and the second swing arm 6A by moving the connection portion 15 in the left-right direction when traveling on a slope or turning. 6B can be interlocked. In addition, as shown in FIG. 6, when one wheel 4 momentarily rides on a step and an impact force acts on the interlocking means 7, the connecting portion 15 does not move and the first swing arm 7 moves. Only one of 6A or the second swing arm 6B can be tilted.

8 is a cross-sectional view of the connection portion 15, and FIG. 9 is a cross-sectional view taken along line AA of FIG. As shown in FIGS. 8 and 9, the connecting portion 15 of this embodiment has a case 16 that is rotatable with respect to the first connecting portion 14A and the second connecting portion 14B. The case 16 includes, for example, a first end 16A, which is the end on the first connecting portion 14A side, and a second end 16B, which is the end on the second connecting portion 14B side.

The case 16 preferably includes a generally cylindrical case body 16a and a pair of end plates 16b closing first and second ends 16A and 16B of the case body 16a. The end plate 16b is fixed to the case main body 16a by, for example, welding, press fitting, or screwing.

At least one groove 16c extending along a first shaft 17A and a second shaft 17B, which will be described later, is formed in the inner peripheral surface of the case 16 of this embodiment. The groove 16c preferably extends from the first end 16A to the second end 16B.

The first shock absorbing portion 9A of this embodiment includes a first shaft 17A having a male thread formed around it, a first nut 18A having a female thread corresponding to the first shaft 17A, and a first nut 18A. and a first spring 19A disposed between the first end 16A. The first shaft 17A is desirably arranged at the center of rotation of the case 16 . It is desirable that the first nut 18A rotates in synchronization with the case 16. As shown in FIG. A compression coil spring, for example, is preferably employed as the first spring 19A.

Such a first shock absorbing portion 9A can change the elastic force of the first spring 19A by changing the relative position between the first shaft 17A and the first nut 18A. You can adjust the size.

The second shock absorbing portion 9B of this embodiment includes a second shaft 17B having a male thread formed around it, a second nut 18B having a female thread corresponding to the second shaft 17B, and a second nut 18B. and a second spring 19B disposed between the second end 16B. The second shaft 17B is desirably arranged at the center of rotation of the case 16 . It is desirable that the second nut 18B rotates in synchronization with the case 16. As shown in FIG. A compression coil spring, for example, is preferably employed as the second spring 19B.

Such a second shock absorbing portion 9B can change the elastic force of the second spring 19B by changing the relative position between the second shaft 17B and the second nut 18B, and the shock force that can be absorbed can be changed. You can adjust the size.

Preferably, the first nut 18A and the second nut 18B each have a convex portion 18a arranged in the groove 16c of the case 16. As shown in FIG. For example, the convex portion 18a may be formed integrally with the first nut 18A and the second nut 18B, or may be formed separately. Such first nut 18A and second nut 18B can be reliably rotated in synchronization with the case 16 .

It is desirable that the first shaft 17A and the second shaft 17B are arranged on the same axis a2. The first shaft 17A and the second shaft 17B of this embodiment are reverse threads to each other. By rotating the case 16, the first shock absorbing portion 9A and the second shock absorbing portion 9B can move the first nut 18A and the second nut 18B in opposite directions. It is easy to uniformly change the elastic force of 19A and the second spring 19B.

It is desirable that the first shaft 17A and the second shaft 17B contact each other at the central position in the longitudinal direction of the case 16 when the first spring 19A and the second spring 19B are stretched. For example, when one of the first spring 19A and the second spring 19B is contracted to absorb the impact force, the first shaft 17A and the second shaft 17B move beyond the center position of the case 16 in the longitudinal direction. A configuration is adopted in which no entry is made inside. Such a first impact absorbing portion 9A and a second impact absorbing portion 9B suppress the influence of the impact force input from one of the first wheel 4A and the second wheel 4B from reaching the other wheel 4. can be done.

As shown in FIG. 7 , the interlocking means 7 of this embodiment includes a tilting member 20 fixed to the swing arm 6 and a direction changing member 21 for changing the moving direction of the connecting member 8 . The tilting member 20 includes, for example, a first tilting member 20A fixed to the first swing arm 6A and a second tilting member 20B fixed to the second swing arm 6B.

The first tilting member 20A is formed, for example, in the shape of an arc with the axis a1 of the first swing arm 6A as the arc center. The second tilting member 20B is formed, for example, in an arcuate surface shape with the axis a1 of the second swing arm 6B as the arc center. Such a tilting member 20 helps the swing arm 6 to tilt smoothly.

The direction changing member 21 includes, for example, a first direction changing member 21A that changes the moving direction of the first connecting portion 14A and a second direction changing member 21B that changes the moving direction of the second connecting portion 14B. In the present embodiment, the first direction change member 21A and the second direction change member 21B are arranged on both outer sides of the connecting portion 15, respectively.

The first direction changing member 21A is, for example, shaped like a disk centered on an axis a3 perpendicular to the axis a1 of the first swing arm 6A. 21 A of 1st direction change members may be formed in the circular arc surface shape which made the axial center a3 the circular arc center at least one part, for example.

The second direction changing member 21B is, for example, shaped like a disk around an axis a4 that is perpendicular to the axis a1 of the second swing arm 6B. For example, at least a portion of the second direction changing member 21B may be formed in an arc surface shape with the axis a4 as the arc center.

The first connecting portion 14A of the connecting member 8 of this embodiment includes a first lower string-like body 22A wound around the first tilting member 20A of the first swing arm 6A and a first lower string-like body 22A wound around the first direction changing member 21A. 1 upper string-like body 23A. The first connecting portion 14A preferably has a first straight portion 24A connecting the first lower string-like body 22A and the first upper string-like body 23A.

The first linear portion 24A is provided with, for example, a first spring means 25A that biases the first swing arm 6A downward. A compression coil spring, for example, is preferably employed for the first spring means 25A. Such a first spring means 25A can suppress the inclination of the vehicle body toward the first wheel 4A, thereby enhancing stability during running.

The second connecting portion 14B of the connecting member 8 of the present embodiment includes a second lower string-like body 22B wound around the second tilting member 20B of the second swing arm 6B and a second lower string-like body 22B wound around the second direction changing member 21B. It has two upper string-like bodies 23B. The second connecting portion 14B preferably has a second straight portion 24B that connects the second lower string-like body 22B and the second upper string-like body 23B.

The second linear portion 24B is provided with, for example, a second spring means 25B that biases the second swing arm 6B downward. A compression coil spring, for example, is preferably employed for the second spring means 25B. Such a second spring means 25B can suppress the inclination of the vehicle body toward the second wheel 4B and improve the stability during running.

The first lower cord-like body 22A, the first upper cord-like body 23A, the second lower cord-like body 22B, and the second upper cord-like body 23B are preferably each composed of a roller chain. In this case, the first tilting member 20A, the first direction-changing member 21A, the second tilting member 20B, and the second direction-changing member 21B are each formed in a sprocket shape having teeth that can mesh with the roller chain. desirable. Such a connecting member 8 is excellent in strength and durability.

The interlocking means 7 of this embodiment includes a lock mechanism (not shown) that stops the interlocking of the tilting motion of the swing arm 6 . The lock mechanism can restrict, for example, lateral movement of the connecting portion 15 . Such a multi-wheeled vehicle 1 can be fixed by restricting the interlocking of the swing arm 6 when parking or when the interlocking function of the swing arm 6 is unnecessary.

It is desirable that the first impact absorbing portion 9A and the second impact absorbing portion 9B respectively absorb the impact force from the first wheel 4A and the second wheel 4B while the lock mechanism is operating. Such a first shock absorbing portion 9A and a second shock absorbing portion 9B can function as left and right independent suspensions.

FIG. 10 is a perspective view conceptually showing an interlocking means 30 of another embodiment. The same reference numerals are assigned to the same components as in the above-described embodiment, and the description thereof is omitted. As shown in FIG. 10 , the interlocking means 30 of this embodiment includes a connecting member 31 for interlocking the tilting motion of the swing arm 6 , a tilting member 32 fixed to the swing arm 6 , and a movement of the connecting member 31 . and a redirecting member 33 for changing direction.

The tilting member 32 includes, for example, a first tilting member 32A fixed to the first swing arm 6A and a second tilting member 32B fixed to the second swing arm 6B, similar to the tilting member 20 described above. there is The first tilting member 32A and the second tilting member 32B are formed, for example, in the shape of an arc with the axis a1 of the swing arm 6 as the center of the arc, similar to the first tilting member 20A and the second tilting member 20B. ing.

The direction changing member 33 is, for example, shaped like a disk around an axis a5 perpendicular to the axis a1 of the swing arm 6. As shown in FIG. The redirecting member 33 may, for example, consist of two redirecting members 33, like the redirecting member 21 described above.

The connecting member 31 of this embodiment includes a first lower string-like body 34A wound around the first tilting member 32A of the first swing arm 6A and a second lower string-like body 34A wound around the second tilting member 32B of the second swing arm 6B. It has a lower string-like body 34B and an upper string-like body 35 wound around the direction changing member 33 .

The connecting member 31 includes a first straight portion 36A that connects the first lower string-like body 34A and the upper string-like body 35, and a second straight portion that connects the second lower string-like body 34B and the upper string-like body 35. It is desirable to have 36B. The first straight portion 36A of this embodiment is arranged between the first swing arm 6A and the turning member 33. As shown in FIG. The second straight portion 36B of this embodiment is arranged between the second swing arm 6B and the redirecting member 33. As shown in FIG.

The first linear portion 36A is provided with, for example, a first spring means 37A that biases the first swing arm 6A downward. A compression coil spring, for example, is preferably employed for the first spring means 37A. Such a first spring means 37A can suppress tilting of the vehicle body in the direction of the first wheel 4A and improve stability during running.

The second linear portion 36B is provided with, for example, a second spring means 37B that biases the second swing arm 6B downward. A compression coil spring, for example, is preferably used for the second spring means 37B. Such a second spring means 37B can suppress tilting of the vehicle body in the direction of the second wheel 4B and improve stability during running.

As with the connecting member 8 described above, the connecting member 31 of this embodiment includes a first shock absorbing portion 38A that absorbs the impact force input from the first wheel 4A, and a first shock absorbing portion 38A that absorbs the impact force input from the second wheel 4B. and a second shock absorbing portion 38B that absorbs.

The first shock absorbing portion 38A of this embodiment is provided in the first straight portion 36A between the first swing arm 6A and the direction changing member 33. As shown in FIG. The second shock absorbing portion 38B of this embodiment is provided in the second straight portion 36B between the second swing arm 6B and the direction changing member 33. As shown in FIG. Such interlocking means 30 can be suitably employed when the inter-wheel distance between the first wheel 4A and the second wheel 4B is small.

Although not shown, the first shock absorbing portion 38A preferably includes a first shaft 17A, a first nut 18A and a first spring 19A, like the first shock absorbing portion 9A described above. Similarly, the second shock absorber 38B preferably includes a second shaft 17B, a second nut 18B and a second spring 19B, similar to the second shock absorber 9B described above.

11 is a side view showing a multi-wheeled vehicle 40 of another embodiment, and FIG. 12 is a bottom view of the multi-wheeled vehicle 40 of FIG. As shown in FIGS. 11 and 12, the multi-wheeled vehicle 40 of this embodiment has a front wheel 41 with one wheel 42 and a rear wheel 43 with three wheels 42 . The multi-wheeled vehicle 40 may be provided with auxiliary wheels 44 behind the rear wheels 43, for example. The multi-wheeled vehicle 40 may have, for example, two rear wheels 3 and two or three front wheels 2, like the multi-wheeled vehicle 1 described above.

A multi-wheeled vehicle 40 of this embodiment includes a frame 45 , a handle 46 attached to the frame 45 , a saddle 47 and a pair of pedals 48 . The handle 46 , saddle 47 and pedals 48 in this embodiment are attached to the rear of the frame 45 . The steering wheel 46 of this embodiment is configured to be able to steer the front wheels 2 via a steering mechanism 49 .

The multi-wheeled vehicle 40 is desirably of an electric assist type including a motor (not shown) that assists the pedal effort input from the pedals 48 . A multi-wheeled vehicle 40 of this embodiment includes a loading platform 50 in front of the frame 5 on which people or objects can be loaded. Such a multi-wheeled vehicle 40 can be driven while checking the condition of the loading platform 50, and is excellent in safety.

The wheels 42 include, for example, a first wheel 42A arranged on one side of the frame 45 in the left-right direction and a second wheel 42B arranged on the other side of the frame 45 in the left-right direction. Wheels 42 may include, for example, a central wheel 42C disposed between first wheel 42A and second wheel 42B. The center wheel 42C and auxiliary wheels 44 are preferably mounted on a frame 45, respectively.

A multi-wheeled vehicle 40 of this embodiment includes a pair of swing arms 51 whose one end 51a side is supported by a frame 45 and whose other end 51b side is vertically tiltable, and the swing arms 51 are attached to the other end 51b side. and wheels 42 that are The one end 51a sides of the pair of swing arms 51 are preferably supported on the same axis a6 as with the swing arms 6 described above. The swing arm 51 includes, for example, a first swing arm 51A to which the first wheel 42A is attached and a second swing arm 51B to which the second wheel 42B is attached.

The multi-wheeled vehicle 40 of this embodiment includes an interlocking means 52 that interlocks the tilting motion of the swing arm 51 . Such an interlocking means 52 can alternately interlock the tilting motions of the pair of swing arms 51 in the vertical direction. 42 ground pressure can be kept even.

The interlocking means 52 of this embodiment includes a connecting member 53 for alternately interlocking the tilting motion of the first swing arm 51A and the tilting motion of the second swing arm 51B. The connecting member 53 of this embodiment includes a first impact absorbing portion 54A that absorbs the impact force input from the first wheel 42A, and a second impact absorbing portion 54B that absorbs the impact force input from the second wheel 42B. have.

In such a multi-wheeled vehicle 40, even if one of the first wheels 42A or the second wheels 42B runs over a step, the vehicle body will be more stable when an impact force is input from one of the first wheels 42A or the second wheels 42B. behavior can be stabilized.

FIG. 13 is a sectional view conceptually showing the interlocking means 52 of FIG. As shown in FIGS. 11 to 13, the interlocking means 52 of this embodiment includes a first cylinder 55A for tilting the first swing arm 51A and a second cylinder 55B for tilting the second swing arm 51B. and The interlocking means 52 preferably includes a first tilting means 56A fixed to the first swing arm 51A and a second tilting means 56B (not shown) fixed to the second swing arm 51B.

The connecting member 53 of this embodiment includes a first string-like body 57A that connects the first cylinder 55A and the first tilting means 56A, and a second string-like body 57B that connects the second cylinder 55B and the second tilting means 56B ( not shown) and a fluid passage 58 connecting the first cylinder 55A and the second cylinder 55B.

In this interlocking means 52, the first cylinder 55A is operated via the first string-like body 57A in accordance with the tilting motion of the first swing arm 51A, and the fluid is moved to the second cylinder 55B via the fluid passage 58. be able to. At this time, the interlocking means 52 can tilt the second swing arm 51B via the second string-like body 57B by operating the second cylinder 55B.

Similarly, the interlocking means 52 operates the second cylinder 55B via the second string-like body 57B in accordance with the tilting motion of the second swing arm 51B, and moves the fluid to the first cylinder 55A via the fluid passage 58. can be made At this time, the interlocking means 52 can tilt the first swing arm 51A via the first string-like body 57A by the operation of the first cylinder 55A.

The interlocking means 52 of this embodiment includes a lock mechanism 59 for stopping the interlocking of the tilting motion of the swing arm 51 . The lock mechanism 59 of this embodiment can regulate movement of the fluid in the fluid path 58 . Such a multi-wheeled vehicle 40 can be fixed by restricting the interlocking of the swing arm 51 when parking or when the interlocking function of the swing arm 51 is unnecessary.

It is desirable that the first shock absorbing portion 54A and the second shock absorbing portion 54B absorb the shock force from the first wheel 42A and the second wheel 42B, respectively, while the lock mechanism 59 is in operation. Such a first shock absorbing portion 54A and a second shock absorbing portion 54B can function as left and right independent suspensions.

The first impact absorbing portion 54A and the second impact absorbing portion 54B are provided, for example, between the first cylinder 55A and the second cylinder 55B. The first shock absorbing portion 54A is preferably provided between the first cylinder 55A and the lock mechanism 59. As shown in FIG. The first impact absorbing portion 54A of this embodiment is provided adjacent to the first cylinder 55A. Even if the fluid from the first cylinder 55A momentarily becomes high pressure due to the impact force input from the first wheel 42A, the first impact absorbing portion 54A can directly absorb the pressure. , there is no risk of affecting the second cylinder 55B.

The second shock absorbing portion 54B is preferably provided between the second cylinder 55B and the lock mechanism 59. As shown in FIG. The second impact absorbing portion 54B of this embodiment is provided adjacent to the second cylinder 55B. Even if the fluid from the second cylinder 55B momentarily becomes high pressure due to the impact force input from the second wheel 42B, the second shock absorbing portion 54B can directly absorb the pressure. , there is no risk of affecting the first cylinder 55A.

The configurations of the first impact absorbing portion 54A, the first cylinder 55A, the first tilting means 56A, and the first cord-like body 57A will be described below with reference to FIG. The structures of the second shock absorbing portion 54B, the second cylinder 55B, the second tilting means 56B and the second cord-like body 57B are respectively the first shock absorbing portion 54A, the first cylinder 55A, the first tilting means 56A and the first tilting means 56A. Since it is the same as the cord-like body 57A, its description is omitted.

As shown in FIG. 13, the first tilting means 56A is formed, for example, in the shape of an arcuate surface centered on an axis a6 (shown in FIG. 12) on the one end 51a side of the first swing arm 51A. . The first string-like body 57A is preferably wound around the first tilting means 56A. The first tilting means 56A and the first string-like body 57A are useful for smooth tilting motion of the first swing arm 51A.

The first string-like body 57A is desirably composed of a roller chain. In this case, the first tilting means 56A is preferably formed in the shape of a sprocket having teeth that can mesh with the roller chain. Such a connecting member 53 is excellent in strength and durability.

The first cylinder 55A is provided with, for example, a first spring means 60A for controlling the movement of the second cylinder 55B (shown in FIG. 12) via fluid passage 58. As shown in FIG. A compression coil spring, for example, is preferably employed for the first spring means 60A. The descending speed of the second cylinder 55B can be adjusted, for example, by changing the elastic force of the first spring means 60A with the first pressure adjusting knob 61A. Such a first cylinder 55A can adjust the force acting on the second swing arm 51B (shown in FIG. 12), and controls the interlocking of the tilting motions of the first swing arm 51A and the second swing arm 51B. can do.

The first shock absorbing portion 54A of this embodiment includes a first spring 62A for adjusting the magnitude of the shock force that can be absorbed, and a first adjusting knob 63A for changing the elastic force of the first spring 62A. I'm in. A compression coil spring, for example, is preferably employed as the first spring 62A. The magnitude of the shock force that can be absorbed by the first shock absorbing portion 54A can be easily finely adjusted, and can be appropriately changed according to the condition of the road surface on which the vehicle is running.

In the above-described embodiment, an aspect using a compression coil spring for the first impact absorbing portion and the second impact absorbing portion was exemplified, but the first impact absorbing portion and the second impact absorbing portion are limited to such an aspect. not a thing The first shock absorbing portion and the second shock absorbing portion may be of, for example, a torsion bar type or an air cylinder type.

Although the particularly preferred embodiments of the present invention have been described in detail above, the present invention is not limited to the above-described embodiments, and can be implemented in various modified forms.

1 multi-wheeled vehicle 4 wheel 4A first wheel 4B second wheel 5 frame 6 swing arm 6a one end 6b other end 6A first swing arm 6B second swing arm 7 interlocking means 8 connecting member 9A first impact absorbing portion 9B Second shock absorbing part

Claims (10)

A multi-wheeled vehicle having a plurality of wheels on at least one of the front wheels or the rear wheels,
a frame, a pair of swing arms whose one end side is supported on the same axis of the frame and whose other end side is vertically tiltable, and the wheel attached to the other end side of the swing arm; an interlocking means for interlocking the tilting motion of the swing arm,
The wheels include a first wheel arranged on one side in the left-right direction of the frame and a second wheel arranged on the other side in the left-right direction of the frame,
The swing arm includes a first swing arm to which the first wheel is attached and a second swing arm to which the second wheel is attached,
the interlocking means includes a connecting member for alternately interlocking the tilting motion of the first swing arm and the tilting motion of the second swing arm;
The connecting member has a first impact absorbing portion that absorbs impact force input from the first wheel, and a second impact absorbing portion that absorbs impact force input from the second wheel.
multi-wheeled vehicle. The connecting member includes a first connecting portion connected to the first swing arm, a second connecting portion connected to the second swing arm, and connecting the first connecting portion and the second connecting portion. a connection;
2. The multi-wheeled vehicle according to claim 1, wherein said first shock absorbing portion and said second shock absorbing portion are provided at said connection portion. The connecting portion has a case that is rotatable with respect to the first connecting portion and the second connecting portion,
The case includes a first end that is an end on the first connecting portion side, and a second end that is an end on the second connecting portion side. a first shaft having a male thread formed around the rotation center of the case; a first nut having a female thread corresponding to the first shaft and rotating in synchronization with the case; and the first nut. and a first spring disposed between the first end;
The second shock absorbing part has a second shaft around which a male screw is formed around the rotation center of the case, and a female screw corresponding to the second shaft, and rotates in synchronization with the case. 3. The multi-wheeled vehicle of claim 2, including a second nut and a second spring disposed between said second nut and said second end. 4. The multi-wheeled vehicle according to claim 3, wherein said first shaft and said second shaft are arranged on the same axis and are oppositely threaded to each other. at least one groove extending along the first axis and the second axis is formed in the inner peripheral surface of the case;
5. The multi-wheeled vehicle according to claim 3, wherein each of said first nut and said second nut has a convex portion arranged in said groove. The interlocking means includes a direction changing member that changes the moving direction of the connecting member,
The first shock absorbing portion is provided between the first swing arm and the direction changing member,
2. The multi-wheeled vehicle according to claim 1, wherein said second shock absorbing portion is provided between said second swing arm and said direction changing member. the interlocking means includes a first cylinder for tilting the first swing arm and a second cylinder for tilting the second swing arm;
2. The multi-wheeled vehicle according to claim 1, wherein said connecting member includes a fluid passage connecting said first cylinder and said second cylinder. 8. The multi-wheeled vehicle according to claim 7, wherein said first impact absorbing portion and said second impact absorbing portion are provided between said first cylinder and said second cylinder. the interlocking means includes a lock mechanism that stops the interlocking of the tilting motion of the swing arm;
9. The vehicle according to claim 1, wherein said first impact absorbing portion and said second impact absorbing portion respectively absorb impact forces from said first wheel and said second wheel while said lock mechanism is operating. A multi-wheeled vehicle according to any one of the items. The front wheel is one wheel,
10. The multi-wheeled vehicle according to any one of claims 1 to 9, wherein said rear wheels are three wheels including said first wheel, said second wheel and a central wheel.

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