WO2012176489A1

WO2012176489A1 - Three-wheeled motor vehicle

Info

Publication number: WO2012176489A1
Application number: PCT/JP2012/053024
Authority: WO
Inventors: 一郎萬羽
Original assignee: 有限会社萬羽
Priority date: 2011-06-20
Filing date: 2012-02-09
Publication date: 2012-12-27
Also published as: JP2013001316A

Abstract

A three-wheeled motor vehicle having two rear wheels. The three-wheeled motor vehicle is provided with: a support body for a right rear wheel, mounted relative to a frame so as to be capable of moving vertically; a support body for a left rear wheel, mounted relative to the frame so as to be capable of moving vertically; and a coordination means which, in order to move the left and right support bodies in the same direction during turning, coordinates the movement of the left and right support bodies.

Description

Tricycle

This invention relates to an improvement of a three-wheeled vehicle having one front wheel and two rear wheels.

The car will be lifted by the centrifugal force when turning. In a three-wheeled vehicle having a front wheel as one wheel, there is no wheel positioned outside at the time of turning on the front side, so that it is difficult to prevent the rear wheel from lifting outside and the roll is likely to occur.

As shown in FIG. 4, in the three-wheeled vehicle in which the left and right rear wheels W, W are independently supported with respect to the frame F, the rear wheel W on the outside of the turn is lifted, while the rear wheel W on the inside of the turn is Because of the sinking, rolls are particularly prone to occur, and turning at high speed increases the risk of rollover. For this reason, in the three-wheeled vehicle shown in FIG. 4, measures are generally taken to harden the suspension S.

On the other hand, as shown in FIG. 5, if a hosing H in which left and right axles W, W and a gear box are integrated with each other via a swing arm A is attached to the main frame F, the left and right wheels are turned when turning. Since W and W are lifted at the same time, it is difficult for a roll to be generated, but it is necessary to increase the rigidity of the hosing H. Therefore, the unsprung mass of the suspension S is increased unnecessarily.

The main problem to be solved by the present invention is that in a three-wheeled vehicle in which the left and right rear wheels are independently supported with respect to the frame, a roll during turning is prevented from being generated with a simple structure as much as possible. is there.

In order to achieve the above object, in the present invention, a three-wheeled vehicle is a three-wheeled vehicle having two rear wheels.
A right rear wheel support combined in a vertically movable manner with respect to the frame;
A left rear wheel support combined to be movable up and down with respect to the frame;
The left and right support bodies are provided with linkage means for linking the left and right support bodies so as to move in the same direction when turning.

When the three-wheeled vehicle turns, the rear wheel outside the turn is lifted by the centrifugal force, and the support for supporting the lifted rear wheel is also lifted, but the left and right supports are linked by the linkage means. Therefore, the support body supporting the rear wheel inside the turning is also lifted, and therefore the rear wheel inside the turning is also lifted. Thereby, although it is the structure which supports a left-and-right rear wheel separately with respect to the said flame | frame, it can prevent that a roll arises in a three-wheeled vehicle as much as possible at the time of the said turning.

The linkage means;
A fulcrum mechanism provided in the frame above the rear axle,
A right connecting rod having a lower end pivotally attached to the right support and an upper end of the rod linked to a fulcrum mechanism;
A left connecting rod pivotally attached to the left support and having the rod upper end linked to a fulcrum mechanism;
When either one of the right connecting rod and the left connecting rod is moved by the fulcrum mechanism, the other may be moved in the same direction.

In this way, when the support body supporting the rear wheel outside the turn is lifted by the turning of the tricycle, the connecting rod that pivotally attaches the lower end of the rod to the support body is moved, and the inside of the turn is made via the fulcrum mechanism. The connecting rod that supports the rear wheel can be moved to lift the support that supports the rear wheel inside the turn.

Further, the fulcrum mechanism is
A shock absorber fixed to the frame;
Guide means for suppressing the shakiness of the movable part of the shock absorber,
The upper ends of the right connecting rod and the left connecting rod may be directly or indirectly connected to the movable part of the shock absorber.

In this way, when the support body supporting the rear wheel outside the turn is lifted by the turning of the tricycle, the connecting rod that pivotally attaches the lower end of the rod to the support body is moved, and the movable part of the shock absorber moves. Is done. When the movable part of the shock absorber is moved in this way, the connecting rod that pivotally attaches the lower end of the rod to the support that supports the rear wheel on the inside of the turn is also moved through this movable part. The support for supporting the can also be lifted. Since the movable part of the shock absorber is moved without rattling by the guide means, the inner support body can be moved by the same amount in the same direction without time lag in conjunction with the movement of the outer support body. .

According to the present invention, in a three-wheeled vehicle in which the left and right rear wheels are independently supported with respect to the frame, it is possible to prevent a roll during turning with a simple structure as much as possible.

FIG. 1 is a perspective view of a main part of a three-wheeled vehicle according to an embodiment, and shows a main part of the three-wheeled vehicle as viewed from the rear. FIG. 2 is an exploded perspective view of the main part shown in FIG. FIG. 3 is a configuration diagram showing a state in which the three-wheeled vehicle according to the embodiment turns to the left as viewed from the rear, and a person who gets on the vehicle is indicated by a two-dot chain line. FIG. 4 is a configuration diagram showing a state in which a conventional three-wheeled vehicle turns to the left as viewed from the rear, and a person who gets on the vehicle is indicated by a two-dot chain line. FIG. 5 is a perspective view of a main part of a conventional three-wheeled vehicle.

Hereinafter, a typical embodiment of the present invention will be described with reference to FIGS. The three-wheeled vehicle according to this embodiment is a vehicle having one front wheel (not shown) and two rear wheels 1.

The rear wheel 1 is supported by a frame 2 (subframe) connected to a main frame (not shown) via a support 3. The frame 2 is disposed at the center x (see FIG. 3) of the automobile, and the support bodies 3 are disposed on the left and right sides thereof. The left and

right supports

3 and 3 are combined with the frame 2 so as to be movable up and down.

In the illustrated example, the frame 2 has a rectangular upper frame portion 20 and a rectangular lower frame portion 21, and four corners of the upper frame portion 20 are respectively positioned below the lower frame portion 21. It is connected to the corner by a vertical connecting rod 22.

On the other hand, in the example shown in the figure, the left and

right supports

3 and 3 are each composed of an upper arm 30, a lower arm 31, and a knuckle arm 32.

The knuckle arm 32 has a central portion 32a provided with a passage portion for an axle of the rear wheel 1 (a shaft for driving the rear wheel 1 / not shown), and extends from the upper end of the central portion 32a toward the center x side of the automobile. An upper part 32c to be extended and a lower part 32d to be extended from the lower end of the central part 32a toward the center x of the automobile are provided.

The upper arm 30 and the lower arm 31 are respectively located between the frame 2 and the knuckle arm 32 and connect them. Each of the upper arm 30 and the lower arm 31 branches back and forth on the connection side with the frame 2 and also branches back and forth on the connection side with the knuckle arm 32.

Specifically, (1) the front branching portion 30a of the upper arm 30 located on the center x side of the vehicle is located at the front corner of the upper frame portion 20 of the frame 2 in the longitudinal direction y of the vehicle (FIG. 1). It is assembled so as to be rotatable with a shaft 33 along the axis. (2) The rear branch portion 30b located on the center x side of the automobile of the upper arm 30 is an axis along the axis in the longitudinal direction y of the automobile at the rear corner of the upper frame portion 20 of the frame 2. 33 is rotatably assembled. (3) The front branch portion 31a of the lower arm 31 located on the side of the vehicle center x has a shaft 33 with an axis lined in the longitudinal direction y of the vehicle at the front corner of the lower frame portion 21 of the frame 2. It is assembled so that it can rotate. (4) A rear branch portion 31b of the lower arm 31 located on the center x side of the automobile has a shaft 33 with an axis line along the longitudinal direction y of the automobile at the rear corner of the lower frame portion 21 of the frame 2. It is assembled to be rotatable. (5) In the state where the upper part 32c of the knuckle arm 32 is placed between the branch parts 30c located on the rear wheel 1 side of the upper arm 30, the branch part 30c and the upper part 32c are arranged in the longitudinal direction of the automobile. It is assembled so as to be rotatable with a shaft 34 having an axis along y. (6) In a state where the lower part 32d of the knuckle arm 32 is placed between the branch part 31c located on the rear wheel 1 side of the lower arm 31, the branch part 31c and the lower part 32d are arranged in the vehicle longitudinal direction y. It is assembled so as to be rotatable with a shaft 34 along the axis.

In the illustrated example, a differential (not shown) is disposed in the frame 2, and the differential, the axle (not shown), and the axle and the hub of the rear wheel 1 are connected by a universal joint.

In the three-wheeled vehicle according to this embodiment, the right and

left support members

3 and 3 are linked so that the left and

right support members

3 and 3 are moved in the same direction when turning. It has.

When the three-wheeled vehicle turns, the rear wheel 1 outside the turn is lifted by centrifugal force, and thereby the support 3 that supports the lifted rear wheel 1 is also lifted. Since they are linked by means 4, the support 3 that supports the rear wheel 1 inside the turn is also lifted, and therefore the rear wheel 1 inside the turn is also lifted. Thereby, although it is the structure which supports the left and right rear wheels 1 and 1 separately with respect to the frame 2, it is possible to prevent the three-wheeled vehicle from rolling as much as possible during the turning. (Figure 3)

In this embodiment, the linking means 4 pivots (rotates freely) a fulcrum mechanism 40 provided in the frame 2 above the axle of the rear wheel 1 and a rod lower end 41a on the right support 3. A right connecting rod 41 in which the rod upper end 41b is linked to the fulcrum mechanism 40, and a left connecting rod in which the rod lower end 41a is pivotally attached to the left support 3 and the rod upper end 41b is linked to the fulcrum mechanism 40. Rod 41. When one of the right connecting rod 41 and the left connecting rod 41 is moved by the fulcrum mechanism 40, the other of them is also moved in the same direction.

In the illustrated example, the right connecting rod 41 and the left connecting rod 41 are arranged such that the rod upper end 41b is positioned behind the frame 2 and the rod is attached to the fulcrum mechanism 40 supported by the upper frame portion 20 of the frame 2. The upper end 41b is linked. The rod lower end 41a of the right connecting rod 41 is pivotally attached to the right end of the lower arm 31 by a ball joint with the rod lower end 41a positioned behind the lower arm 31 constituting the right support 3. Further, the rod lower end 41a of the left connecting rod 41 is pivotally attached to the left end portion of the lower arm 31 with the rod lower end 41a positioned behind the lower arm 31 constituting the left support 3.

When the support body 3 that supports the rear wheel 1 outside the turn is lifted by the turning of the tricycle, the connecting rod 41 that pivotally attaches the rod lower end 41 a to the support body 3 is lifted, The connecting rod 41 that supports the rear wheel 1 can be moved upward to lift the support body 3 that supports the rear wheel 1 inside the turn.

In this embodiment, the fulcrum mechanism 40 includes a shock absorber 401 fixed to the frame 2 and a guide unit 402 that suppresses rattling of the movable portion 401a of the shock absorber 401. . The right connecting rod 41 and the rod upper end 41b of the left connecting rod 41 are each indirectly connected to the movable portion 401a of the shock absorber 401.

In the illustrated example, the shock absorber 401 includes an outer tube 401b and an inner tube 401c, and applies a braking force to the movement or relative movement of the inner tube 401c in the axial direction of the outer tube 401b. Yes. By storing a spring (not shown) that is compressed by the forward movement of the inner tube 401c in the shock absorber 401, the shock absorber 401 can have a suspension function.

In the illustrated example, the shock absorber 401 is mounted and fixed on the upper frame portion 20 of the frame 2 with the outer tube 401b in such a manner that the inner tube 401c is moved back and forth. In the illustrated example, two

intermediate rod bodies

20c and 20c are installed between a front frame structure 20a and a rear frame structure 20b that constitute the upper frame portion 20 of the frame 2. The outer tube 401b is fixed on the two

intermediate rods

20c and 20c by bolts. Further, the inner tube 401c protrudes from the outer tube 401b to the outside, and the lower portion of the inner tube 401c is long in the longitudinal direction y of the automobile formed between the two

intermediate rods

20c and 20c. A guided portion 402a is formed that fits in the following gap 402b without any play. As a result, the inner tube 401c reciprocates while the guided portion 402a is slidably contacted with the two

intermediate rods

20c, 20c, so that no tilt or twist occurs during this reciprocation. Yes. That is, in the illustrated example, the inner tube 401c is the movable portion 401a of the shock absorber 401, and the guide means 402 is configured by the gap 402b between the two

intermediate rods

20c and 20c and the guided portion 402a. ing.

Separately from the illustrated example, when the inner tube 401c is fixed to the frame 2, the outer tube 401b becomes the movable portion 401a. Further, the guide means 402 may be provided on the shock absorber 401 itself. For example, by making the cross section in the direction orthogonal to the reciprocating direction of the inner tube 401c into a polygonal shape, and making the cross section in the same direction of the outer tube 401b into a polygonal shape complementary to the cross sectional shape of the inner tube 401c, It is possible to prevent tilting and twisting during the reciprocating motion.

In this embodiment, the fulcrum mechanism 40 has one end of the lever pivotally connected to the rod upper end 41b of the right connecting rod 41, the other end of the lever is connected to the movable part 401a of the shock absorber 401, and the center of the lever A right lever body 403 in which 403a is rotatably attached to the frame 2,
One end of the lever is pivotally attached to the rod upper end 41b of the left connecting rod 41, the other end of the lever is connected to the movable portion 401a of the shock absorber 401, and the lever center 403a is rotatably attached to the frame 2. And a lever body 403.

In the illustrated example, the lever body 403 is attached to the upper frame portion 20 of the frame 2 on both sides of the center x of the automobile. Both the left and right lever bodies 403 are bent in an L shape. Both the left and right lever bodies 403 are attached to the upper frame portion 20 of the frame 2 such that the bent inner side is directed to the center x side of the automobile. The right lever body 403 is assembled with a bent lever center 403a pivotably mounted on the right rear corner of the upper frame 20 with a vertical axis, with one end of the lever directed rearward and the other end of the lever being the center of the automobile. It faces the x side. The left lever body 403 has a bent lever center 403a mounted on the left rear corner of the upper frame 20 so as to be rotatable with a vertical axis, with one end of the lever directed rearward and the other end of the lever being an automobile. Is directed to the center x side. One end of the lever body 403 and the connecting rod 41 are pivotally attached with a ball joint.

In the illustrated example, the other lever end of the right lever body 403 is pivotally attached to the other end of the rod body 404 whose one end is pivotally attached to the right side of the movable portion 401 a of the shock absorber 401. Is pivotally attached to the other end of a rod 404 whose one end is pivotally attached to the left side of the movable portion 401 a of the shock absorber 401.

Thus, in the illustrated example, the right connecting rod 41 and the rod upper end 41b of the left connecting rod 41 are indirectly connected to the movable portion 401a of the shock absorber 401 via the lever body 403 and the rod body 404, respectively. Has been.

When the support body 3 supporting the rear wheel 1 outside the turn is lifted by the turning of the tricycle, the connecting rod 41 that pivotally attaches the rod lower end 41a to the support body 3 is lifted, and the movable portion 401a of the shock absorber 401 moves. Is done. In the example shown in the figure, when the connecting rod 41 is lifted in this way, the lever body 403 is rotated in such a direction that one end of the lever is brought closer to the center x of the automobile, and this rotation moves the rod body 404 forward, and the movable portion 401a. Is moved forward. When the movable portion 401a of the shock absorber 401 is moved in this way, the connecting rod 41 that pivotally attaches the rod lower end 41a to the support body 3 that supports the rear wheel 1 inside the turning is also lifted through the movable portion 401a. Thereby, the support body 3 which supports the rear wheel 1 inside the turning is also lifted. Since the movable portion 401a of the shock absorber 401 is moved without rattling by the guide means 402, the inner support 3 on the inner side of the swing is moved in the same direction by the same amount in conjunction with the movement of the outer support 3 on the outer side of the swing. Can be moved.

Although not shown, the shock absorber 401 can be attached to the frame 2 so that the movable portion 401a is moved in the vertical direction. In this case, the lower arm 31 of the support body 3 is formed with an extension portion that extends ahead of the rotational assembly portion with the frame 2 and is positioned immediately below the shock absorber 401. This extension portion and the shock absorber The movable portion 401 a of 401 can be directly connected by the connecting rod 41.
The entire contents of the specification, claims, drawings, and abstract of Japanese Patent Application No. 2011-136399 filed on June 20, 2011 are cited herein as disclosure of the specification of the present invention. Incorporated.

Claims

A three-wheeled vehicle with two rear wheels,
A right rear wheel support combined in a vertically movable manner with respect to the frame;
A left rear wheel support combined to be movable up and down with respect to the frame;
A three-wheeled vehicle comprising: a linking means for linking the left and right supports so as to move the left and right supports in the same direction when turning.
The linkage means
A fulcrum mechanism provided in the frame above the rear axle,
A right connecting rod having a lower end pivotally attached to the right support and an upper end of the rod linked to a fulcrum mechanism;
A left connecting rod pivotally attached to the left support and having the rod upper end linked to a fulcrum mechanism;
2. The device according to claim 1, wherein when one of the right connecting rod and the left connecting rod is moved by the fulcrum mechanism, the other is also moved in the same direction. Miwa Motors.
The fulcrum mechanism is
A shock absorber fixed to the frame;
Having a guide means for suppressing the shakiness of the movable part of the shock absorber,
3. The three-wheeled vehicle according to claim 2, wherein the upper ends of the right connecting rod and the left connecting rod are respectively directly or indirectly connected to the movable portion of the shock absorber.