JP2002193174A - Arrangement structure of rear cushion for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide arrangement structure of a rear cushion for a vehicle that can improve the freedom of design and enlarge capacity without interfering with an intake passage extended frontward from an air cleaner, nor needing to take into consideration interference with the rear cushion on the rear side of the air cleaner. SOLUTION: The rear cushion 54 is disposed between the body frame 11 side and the rear arm 14 side supporting a rear wheel 15 in a vertically swingable manner, and the air cleaner 38 is arranged on the upper side of the rear cushion 54. An upper end part 54b of the rear cushion and a front end face 38b of the air cleaner 38 are set into almost the same position in the longitudinal direction of the vehicle.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a rear cushion arrangement structure for a vehicle such as a motorcycle.

[0002]

2. Description of the Related Art Conventionally, a motorcycle of this type has a rear frame disposed on a body frame, which is a skeleton, via a rear arm so as to be swingable up and down, and between the rear arm and the body frame. A rear cushion for absorbing impact is provided.

On the other hand, an air cleaner is arranged near the rear cushion and below the seat, and the air cleaner is connected to the engine via an intake passage.

[0004]

However, in such a conventional vehicle, the rear cushion must secure a predetermined stroke for absorbing the impact.
The upper end of the rear cushion must be set at a relatively high position, and since the rear cushion swings, it is necessary to consider not to interfere with the intake passage extending forward from the air cleaner. The rear side also needs to consider the interference with the rear cushion, which limits the degree of freedom of design and prevents the capacity from being increased.

Therefore, according to the present invention, the rear cushion does not interfere with the intake passage extending forward from the air cleaner, and the rear side of the air cleaner does not need to consider the interference with the rear cushion, so that the design is free. It is an object of the present invention to provide a vehicle rear cushion disposing structure capable of improving the degree and increasing the capacity.

[0006]

In order to achieve the above object, according to the first aspect of the present invention, a vehicle is provided between a rear arm side which supports a rear wheel so as to swing up and down and a vehicle body frame side.
A rear cushion is provided, and an air cleaner is disposed above the rear cushion, and a position of an upper end portion of the rear cushion and a position of a front end surface of the air cleaner are set at substantially the same position in the vehicle front-rear direction. The vehicle has a rear cushion arrangement structure.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, an insertion recess is formed in a lower front portion of the air cleaner, and an upper end of the rear cushion is located in the insertion recess. It is characterized by.

[0008] The invention according to claim 3 is the invention according to claim 1 or 2.
In addition to the above configuration, the rear cushion intersects with the rear arm in a side view, and a lower end portion of the rear cushion is located below the rear arm and between the vehicle body frame and the rear arm. It is characterized in that it is connected to a bridge that is erected.

The invention described in claim 4 is the first to third aspects of the present invention.
In addition to the above configuration, the upper end of the rear cushion is connected to a bracket extending rearward from the vehicle body from a cross member provided in the vehicle width direction of the vehicle body frame.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below based on embodiments.

1 to 11 show an embodiment of the present invention.

First, the structure of the motorcycle will be described. In the motorcycle of this embodiment, a single-cylinder engine 12 is fixed to a body frame 11 as a skeleton, and a steering shaft and the like are provided on the front end side of the body frame 11. A front wheel 13 is supported via the rear wheel 15, and a rear wheel 15 is supported on a rear end side via a rear arm 14 which can swing up and down. The driving force of the engine 12 is transmitted to the rear wheels 15 via a transmission mechanism such as a chain 16. 1 and 2, reference numeral 17 denotes a seat on which an occupant sits, and reference numeral 18 denotes a fuel tank.

As shown in FIG. 3 and the like, the vehicle body frame 11 is provided at its front end with a tubular head pipe 19 through which the steering shaft is inserted. A front side portion 20 of a box-shaped head pipe gusset 20 having a rectangular cross section and a matching structure.
a is fixed by welding.

One end 21a of a pair of left and right seat pillars 21 is fixed to the side surface on the upper side of the rear side 20b of the head pipe gusset 20 by welding.
One end 22a of a pair of left and right down tubes 22 is fixed to the side surface on the lower side of the side 20b by welding. Then, the other end portions 21 of the seat pillars 21
b and the other end 22 b of the down tube 22 are connected via a connection pipe 23.

Further, a front end 24a of a seat rail 24 is fixed to an upper portion of the seat pillar 21, and the seat rail 24 extends substantially horizontally toward the rear.
A front end 25a of the back stay 25 is fixed to the lower side of the seat pillar 21 by welding, and the back stay 25 is extended rearward and obliquely upward to extend toward the rear end 2a.
5b is fixed to the seat rail 24 by welding.

Further, a reinforcing tube 26 is provided between the rear end 25b of the back stay 25 and the rear end 24 of the seat rail 24.

In addition, a cross member 27 for connecting the left and right seat pillars 21 is provided at an intermediate portion of the seat pillar 21 in the vertical direction, while a rear end 24b of both seat rails 24 is provided as shown in FIG. As shown, a seat bracket 30, a first bracket 31, and a second bracket 32 are erected.

As shown in FIG. 3, the rear arm 14 includes a bracket 33 fixed to the seat pillar 21 of the vehicle body frame 11, and a front end 14a having a pivot shaft 34.
The rear arm 14 is mounted on the rear end 14b of the rear arm 14 so as to be swingable up and down. A rear cushion 54 is disposed between the rear arm 14 and the body frame 11 via a first link 55 and a second link 56.

That is, the first link 55 has a substantially triangular shape, and its front end portion is provided on the vehicle body frame 11 via the first shaft 58 so as to be vertically swingable, and is disposed below the rear arm 14. Have been.

The first link 55 has a lower end portion at the rear end, one end 56a of a second link 56 rotatably connected via a second shaft 59, and the other end of the second link 56. 56
b is rotatably connected to the rear arm 14.

A lower end 54a of the rear cushion 54 is rotatably connected to the upper end of the rear end of the first link 55 via a third shaft 60.
4 is rotatably attached to the cross member 27 provided on the seat pillar 21. As shown in FIG. 7, the cross member 27 is provided with a pair of left and right rear cushion brackets 62 extending rearward of the vehicle body. As shown in FIG.
The upper end 54b of the rear cushion 54 via the bolt 63
Is provided rotatably.

An air cleaner 38 is disposed above the rear cushion 54. As shown in FIG. 11, an upper end 54b of the rear cushion 54 is positioned in an insertion recess 38a formed at a lower front portion of the air cleaner 38. I have.

The air cleaner 38 has a substantially square shape, and is provided with an air cleaner bracket 47 of the body frame 11.
4 (see FIG. 4), the position of the front end surface 38b and the position of the upper end 54b of the rear cushion 54 are set to be substantially the same in the vehicle front-rear direction. The intake passage 3 extends from the upper side of the air cleaner 38 toward the front.
The intake passage 39 is connected to the engine 12 via a carburetor 40.

In such a case, the rear cushion 54 is located below the air cleaner 38, and the position of the upper end 54b of the rear cushion 54 is set at substantially the same position as the front end surface 38b of the air cleaner 38. The rear cushion 54 does not interfere with the intake passage 39 extending forward from the upper side of the air cleaner 38, and the rear side of the air cleaner 38 does not need to consider the interference with the rear cushion 54. Thus, the capacity of the air cleaner 38 can be increased.

An insertion recess 38a is formed in the lower front portion of the air cleaner 38, and the upper end 54b of the rear cushion 54 is located in the insertion recess 38a.
The portion of the air cleaner 38 other than the insertion concave portion 38a can be protruded downward, and also in this respect, the volume of the air cleaner 38 can be secured.

Further, the intake passage 39 from the intake port of the engine 12 to the air cleaner 38 is provided with a rear cushion 54.
Since there is no need to consider interference with the engine, it can be made substantially linear, and the engine performance can be improved.

Moreover, the rear cushion 54 is connected to the rear arm 14 via the first link 55 and the second link 56. Since the first link 55 is disposed below the rear arm 14, the rear cushion 54 Since the rear cushion 54 can be positioned below,
Even if the upper end 54b of the rear cushion 54 is set at the above position, the stroke of the rear cushion 54 can be secured.

Incidentally, the insertion recess of the air cleaner, which is one component of the present invention, is not limited to the insertion recess 38a whose side surface along the vehicle width direction of the air cleaner 38 is opened as in the above-described embodiment. Upper end 54b of 54
The shape of the air cleaner is not particularly limited as long as it can be inserted, and the insertion recess may be such that the lower surface and the front side surface of the air cleaner are open.

[0029]

As described above, according to the first aspect of the present invention, the rear cushion is positioned below the air cleaner, and the position of the upper end of the rear cushion is substantially the same as the front end surface of the air cleaner. With this setting, the rear cushion does not interfere with the intake passage that extends forward from the upper side of the air cleaner, and there is no need to consider interference with the rear cushion on the rear side of the air cleaner. And the capacity of the air cleaner can be increased. Further, since the intake passage can be straightened, intake efficiency is improved, and engine performance can be improved.

According to the second aspect of the present invention, in addition to the above effects, an insertion recess is formed in the lower front portion of the air cleaner.
By locating the upper end of the rear cushion in the insertion recess, the portion other than the insertion recess of the air cleaner can be projected downward, and in this respect, the volume of the air cleaner can be secured.

According to the third aspect of the present invention, in addition to the above effects, the rear cushion intersects with the rear arm in a side view, and the lower end of the rear cushion is located below the rear arm. , Because it is connected to the link that is installed between the body frame and the rear arm,
After securing the stroke of the rear cushion, the rear cushion can be positioned below.

According to the fourth aspect of the present invention, in addition to the above effects, the upper end of the rear cushion is connected to the bracket extending rearward from the cross member extending in the vehicle width direction of the vehicle body frame. On the left and right sides of the upper end of the rear cushion, the volume can be increased by expanding the air cleaner forward just behind the cross member.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the motorcycle according to the embodiment.

FIG. 3 is a side view showing a vehicle body frame, an engine, a rear cushion, an air cleaner, a rear wheel, and the like according to the embodiment.

FIG. 4 is a plan view of the vehicle body frame according to the embodiment.

FIG. 5 is a view showing a part of the vehicle body frame according to the embodiment as viewed from the direction of arrow A in FIG. 3;

FIG. 6 is a diagram showing a part of the vehicle body frame according to the embodiment as viewed from the direction of arrow B in FIG. 3;

FIG. 7 is a view according to the embodiment, showing a part of the vehicle body frame as viewed in the direction of arrow C with an air cleaner or the like removed in FIG. 3;

FIG. 8 is a partially cutaway side view showing the air cleaner according to the embodiment.

FIG. 9 is a plan view of the air cleaner according to the embodiment.

FIG. 10 is a side view of the air cleaner according to the embodiment as viewed from the side opposite to FIG. 8;

FIG. 11 is a view showing the air cleaner according to the embodiment, and is a view of FIG. 10 as viewed from the direction of arrow X.

[Explanation of symbols]

 11 Body frame 12 Single cylinder engine 14 Rear arm 14a Front end 14b Rear end 15 Rear wheel 27 Cross member 38 Air cleaner 38a Insertion recess 38b Front end face 39 Intake passage 54 Rear cushion 54a Lower end 54b Upper end 62 Rear cushion bracket

Claims (4)

[Claims] 1. A rear cushion is disposed between a rear arm side for supporting a rear wheel to swing up and down and a vehicle body frame side, and an air cleaner is disposed above the rear cushion. A rear cushion arrangement structure for a vehicle, wherein a position of an upper end portion of a cushion and a position of a front end surface of the air cleaner are set at substantially the same position in a vehicle front-rear direction. 2. The vehicle rear cushion mounting structure according to claim 1, wherein an insertion recess is formed in a front lower portion of the air cleaner, and an upper end of the rear cushion is located in the insertion recess. . 3. The rear cushion intersects with the rear arm in a side view, and a lower end of the rear cushion is located below the rear arm and is bridged between the body frame and the rear arm. The vehicle rear cushion arrangement structure according to claim 1 or 2, wherein the vehicle rear cushion arrangement structure is connected to a link. 4. The rear cushion according to claim 1, wherein an upper end portion of the rear cushion is connected to a bracket extending rearward from a cross member provided in a vehicle width direction of the vehicle body frame. The vehicle rear cushion arrangement structure according to one of the above aspects.