JPH1016856A - Load carrying platform device for tricycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the turning ground load of both rear wheels by fitting a load carrying platform to a rear frame removably in the right or left direction of a vehicle, and moving the load carrying platform in the inclining direction in response to the relative inclination of a front frame against the rear frame. SOLUTION: Vertical connecting shafts 16 are fixed at the front ends of the first arms (a) of bell crank levers 11, 12, and the connecting shafts 16 support a bearing housing 18 fixed on the bottom face of a load carrying platform 17 covering the upper face of a rear frame Fr by bolts 28 via angular contact bearings 19. Both ends of synchronous links 20 are connected to the second arms (b) of a pair of bell crank levers 11, 12 arranged in the longitudinal direction of a vehicle via pivot shafts 21, 21. A front bracket 22 and a rear bracket 23 aligned in the right and left directions of the vehicle are fixed to a front frame and the load carrying platform 17 respectively, and both ends of an interlocking link 24 extended in the right and left directions of the vehicle are connected to the brackets 22, 23 via ball joints 25, 26.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front frame for supporting a single front wheel so as to be steerable and a rear frame for supporting a pair of right and left rear wheels so as to be tiltable in the lateral direction of the vehicle. In addition, the present invention relates to a carrier device in which a carrier can be moved in the left-right direction of the vehicle with respect to the rear frame in a tricycle provided with a driver seat on a front frame and a carrier on a rear frame.

[0002]

2. Description of the Related Art A three-wheeled vehicle in which a front frame and a rear frame are connected to each other so as to be tiltable in the left-right direction is known, as disclosed in Japanese Utility Model Publication No. Hei. Can be tilted in the turning direction.

[0003]

However, since the rear frame of this type of tricycle has a pair of left and right rear wheels grounded, it cannot tilt with respect to the ground, and the rear frame is loaded with luggage. Conventionally, in order to secure the grounding load of the left and right rear wheels during turning, the tread of the rear wheel should be set as wide as possible, and the center of gravity of the rear frame system should be set as low as possible. However, in practice, it is difficult to set as desired due to various conditions.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been developed in consideration of the above circumstances. An object is to provide a bed device.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a front frame for supporting a single front wheel so as to be steerable and a rear frame for supporting a pair of right and left rear wheels. In a tricycle equipped with a driver seat on the front frame and a luggage carrier on the rear frame, the luggage carrier is mounted on the rear frame so that it can be moved in the lateral direction of the vehicle. A first feature is that the loading platform is moved in the tilting direction in accordance with the relative tilt of the unit frame with respect to the rear frame.

According to a second aspect of the present invention, in addition to the above features, the loading platform is attached to the rear frame via a plurality of levers so that the loading platform can be moved parallel to the rear frame in the left-right direction of the vehicle. Features.

[0007] Further, in addition to the first or second feature, the present invention has a third feature in that the front frame and the rear frame are connected via an interlocking link extending in the left-right direction of the vehicle. .

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on embodiments of the present invention shown in the accompanying drawings.

FIGS. 1 to 4 show a first embodiment of the present invention. FIG. 1 is a side view of a motorcycle, FIG. 2 is a plan view thereof, and FIG. 3 is an enlarged sectional view taken along line 3-3 of FIG. FIG. 4 is an operation explanatory view. First, referring to FIG.
Has a front frame Ff that steerably supports a front fork 2 that suspends a single front wheel Wf, and a rear frame Fr that suspends a pair of left and right rear wheels Wr, Wr (see FIG. 4). Both frames Ff, Fr are connected to each other via a well-known Neidhart joint J so as to be tiltable in the left and right direction of the vehicle. A steering handle 3 is attached to an upper end of the front fork 2.

The front frame Ff is provided with a step floor 4 for the operator, a seat 5, and a windshield 6 with a roof.

A rear fork 7 is pivotally supported on the rear frame Fr so as to be vertically swingable, and a pair of left and right cushion units 9 and 9 are interposed therebetween. A power unit 10 including an engine is mounted and supported on the rear fork 7, and rear wheels Wr, Wr are respectively mounted on both ends of an output shaft protruding left and right outside of the power unit 10. Therefore, the tricycle 1 can be driven by driving the rear wheels Wr, Wr by the operation of the power unit 9.

2 and 3, the rear frame Fr
A pair of front and rear and two left and right bell crank levers 11, 11; Each of the bell cranks 11 and 12 includes a first arm a extending forward of the vehicle and a second arm b extending toward the center in the left-right direction of the vehicle.
Pivot 13 connected to the common base of the rear frame Fr
Is rotatably supported by a pair of upper and lower angular contact bearings 15.

A vertical connecting shaft 16 is fixed to the front end of the first arm a of each of the bell crank levers 11, 12.
The connection shaft 16 supports, via an angular contact bearing 19, a bearing housing 18 fixed to the bottom surface of a carrier 17 covering the upper surface of the rear frame Fr with bolts 28. Then, both ends of the synchronization link 20 are connected to the pivot shaft 2 by the second arms b, b of the bell crank levers 11, 11, 12 and 12, which are arranged in pairs in the front-rear direction of the vehicle.
It is connected via 1,21.

As shown in FIGS. 1 and 2, a front bracket 22 and a rear bracket 23 are fixedly mounted on the front frame Ff and the cargo bed 17, respectively. The two ends of the interlocking link 24 extending in the left-right direction of the vehicle
5 and 26 are connected.

Next, the operation of this embodiment will be described with reference to FIGS. During the straight running of the motorcycle 1, the front frame Ff is in an upright state, and accordingly, the loading platform 17 has a neutral position N in which the center thereof is located on a vertical plane including the vertical center line 27 of the vehicle body B. Account (Figure 2
And FIG. 4 (A)).

Now, in order to turn the tricycle 1 leftward, for example, the steering wheel 3 is turned leftward. When the front frame Ff is tilted leftward, the front bracket 22 interlocks with the tilting. Rear bracket 2 via link 24
3, thus shifting the front end of the carrier 17 to the left. At this time, the front bell crank levers 11 and 12 swing the respective second arms b backward by swinging the respective first arms a to the left, so that the synchronization link 20 is displaced rearward. The corresponding rear bell crank levers 11 and 12 are swung in synchronization with the front bell crank levers 11 and 12. As a result, the entire carrier 17 is accurately translated to the left with respect to the rear frame Fr. That is, the loading platform 17 is in a state L (see FIGS. 2 and 4B) in which the center thereof is offset to the left from the vertical plane including the vertical center line 27 of the vehicle body B, and the offset amount is the tilting of the front frame Ff. Increases as the angle increases.

Conversely, when the steering wheel 3 is turned to the right in order to turn the tricycle 1 to the right. When the front frame Ff is tilted to the right, the same action as described above is obtained. It will be understood that the entire carrier 17 moves to the right, and the carrier 17 is in a state R in which the center thereof is offset to the right from the vertical plane including the vertical center line 27 of the vehicle body B (FIG. 2).
And FIG. 4 (C)).

As described above, when the motorcycle 1 turns,
Since the loading platform 17 is automatically moved in the tilting direction of the front frame Ff, and the center thereof is offset inward in the turning direction, the center of gravity of the rear frame Fr system moves inward in the rotating direction, so that when the loading platform 17 is loaded. However, the tilting moment of the rear frame Fr system to the turning outside due to the centrifugal force is reduced, and the turning ground load of the rear wheels Wr, Wr can be secured.

Further, as described above, the operation of moving the carrier 17 in the left-right direction is caused by the rear wheel W on one of the right and left sides during the traveling of the motorcycle 1.
It also occurs when r gets over a large protrusion on the road surface. That is, for example, when the left rear wheel Wr gets over the protrusion, the rear frame Fr tilts to the right with respect to the front frame Ff, but the loading platform 17 is prevented from moving left and right by the front frame Ff via the interlocking link 24. Therefore, the carrier 17 relatively moves in the direction opposite to the tilt direction of the rear frame Fr. As a result, the tilting moment of the rear frame Fr decreases, and also in this case, the ground load of the rear wheels Wr, Wr is ensured.

FIGS. 5 and 6 show a second embodiment of the present invention. Before interlocking the front frame Ff and the rear frame Fr, the rear brackets 22, 23 and the interlocking link 24 are replaced with one. Bell crank lever 11 or 1
The output shaft of an electric motor 29 with a reduction gear attached to the rear frame Fr is connected to the pivot 13 fixed to the base of the second frame 2, and a sensor (not shown) for detecting the relative tilt angle between the front and rear frames Ff, Fr The configuration is the same as that of the previous embodiment except that the electric motor is operated by the output signal of (2). In FIGS. 5 and 6, parts corresponding to those in the previous embodiment are denoted by the same reference numerals.

According to this embodiment, the front and rear frames F
At the time of relative tilting of f and Fr, the loading platform 17 can be moved left and right as in the previous embodiment by the operation of the electric motor 29 according to the tilting angle.

The present invention is not limited to the above embodiment, and various design changes can be made without departing from the gist of the present invention. For example, the present invention can be applied to a foot-operated tricycle without the power unit 9.

[0023]

As described above, according to the first aspect of the present invention, a front frame for steeringably supporting a single front wheel,
A rear frame that supports a pair of left and right rear wheels is connected to each other so as to be tiltable in the left and right direction of the vehicle, a driver seat is provided on the front frame, and a loading frame is provided on the rear frame. The loading platform is mounted movably in the left-right direction of the vehicle, and the loading platform is moved in the tilting direction in accordance with the relative tilting of the front frame with respect to the rear frame. The load carrier can be moved in the direction to secure the turning and grounding load of both rear wheels.In addition, when the rear frame is tilted due to the protrusion of one rear wheel on one side, the load carrier is moved in the opposite direction to the tilt direction. To secure the ground load of both rear wheels.

According to the second aspect of the present invention, the loading platform is attached to the rear frame via a plurality of levers so that the loading platform can be moved in parallel with the rear frame in the left-right direction of the vehicle. Make sure to translate horizontally
This can contribute to securing the ground load of both rear wheels.

According to the third feature of the present invention, the front frame and the rear frame are connected via the interlocking link extending in the left-right direction of the vehicle. Can be imparted to the loading platform in conjunction with the relative tilt of the device, and the apparatus can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a side view of a motorcycle according to a first embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrow 2 in FIG. 1;

FIG. 3 is an enlarged sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is an explanatory diagram of an operation.

FIG. 5 is a plan view corresponding to FIG. 2, showing a second embodiment of the present invention;

FIG. 6 is a sectional view taken along line 5-5 of FIG. 4;

[Explanation of symbols]

 Ff Front frame Fr Rear frame Wf Front wheel Wr Rear wheel 1 Motorcycle as tricycle 5 Seat 11, 12 Bell crank lever as lever 17 Carrier 24 Interlocking link

Claims (3)

[Claims] 1. A front frame (Ff) for supporting a single front wheel (Wf) so as to be steerable and a rear frame (Fr) for supporting a pair of left and right rear wheels (Wr) with respect to each other. In a tricycle provided with a pilot seat (5) on the front frame (Ff) and a carrier (17) on the rear frame (Fr), the carrier is mounted on the rear frame (Fr). 17) so as to be movable in the left-right direction of the vehicle, and the rear frame (F) of the front frame (Ff).
A loading device for a tricycle, characterized in that the loading platform (17) is moved in the tilting direction according to the relative tilt with respect to r). 2. A plurality of levers (11, 1) for moving the carrier (17) parallel to the rear frame (Fr) in the left-right direction of the vehicle.
A loading device for a tricycle, wherein the loading device (17) is attached to the rear frame (Fr) via 2). 3. The vehicle according to claim 1, wherein a distance between the front frame (Ff) and the rear frame (Fr) is:
A luggage carrier device for a tricycle, which is connected via an interlocking link (24) extending in the left-right direction of the vehicle.