JPH03287480A - Arranging structure for heat exchanger of motorcycle - Google Patents

Abstract

PURPOSE:To make the vertical size of a heat exchanger sufficiently long, secure a sufficient capacity on the heat exchanger, and improve the heat exchanging effect by providing the heat exchanger in spaces located above and below the rear section of a swing arm in a longitudinal attitude. CONSTITUTION:An upper radiator 28, a lower radiator 29 and an oil cooler 30 constituting a heat exchanger are provided in spaces between a vehicle body frame 2 and a steering knuckle 14. The upper radiator 28 is arranged in an upper space 33 located above the rear section 32 of an upper arm 18 in a longitudinal attitude. The lower radiator 29 is arranged in an intermediate space 35 located below the rear section 32 of the upper arm 18 and above the rear section 34 of a lower arm 15 in a longitudinal attitude. The oil cooler 30 is arranged in a lower space 36 located below the rear section 34 of the lower arm 15 in a longitudinal attitude.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a heat exchanger arrangement structure in a motorcycle equipped with a swing arm type front wheel suspension.

(Prior Art) Conventionally, there is a structure for disposing a heat exchanger in a motorcycle as shown in, for example, Japanese Unexamined Patent Publication No. 194987/1987.

According to this, the front wheel suspension system of the motorcycle is of a swing arm type. In other words, a swing arm extending in the longitudinal direction is provided, the rear part of this swing arm is pivoted to the front part of the vehicle body frame so as to be able to swing vertically, and the steering knuckle for the front wheel is supported at the front swing end of this swing arm. has been done. When the front wheels receive an impact while the vehicle is running, the swing arm swings up and down to absorb the impact.

Furthermore, a radiator, which is a heat exchanger, is disposed between the vehicle body frame and the steering knuckle, corresponding to the front and rear midway portions of the swing arm.

(Problem to be Solved by the Invention) By the way, in the above conventional configuration, the radiator corresponds to the front and rear midway portions of the swing arm, so the radiator is moved so as to avoid the swing trajectory when the swing arm swings up and down. is provided.

However, if the radiator is provided avoiding the swing locus in this way, the capacity of the radiator will be restricted accordingly, and there is a risk that a sufficient cooling effect will not be obtained. On the other hand, if the capacity of the radiator is given priority and the swing arm is shaped so as to avoid the radiator, the swing arm itself may be disadvantageous in terms of strength.

(Object of the Invention) This invention has been made in view of the above-mentioned circumstances, and is aimed at preventing the swinging of the swing arm from being restricted when a motorcycle is equipped with a swing arm type front wheel suspension system. The purpose is to install a heat exchanger such as a radiator, thereby obtaining a sufficient heat exchange effect.

(Structure of the Invention) The feature of this invention for achieving the above object is that the heat exchanger is placed vertically in the space above and below the rear part of the swing arm, which is the swing center side of the swing arm. The point is that it is arranged like this.

(for production) The effects of the above configuration are as follows.

Rear part of swing arm 15 (or 18) 34.32
A heat exchanger is installed in each space located above and below.

In the above case, the rear part 32, 34 of the swing arm is a part that is pivotably supported on the front part of the vehicle body frame 2 so as to be able to swing up and down, that is, on the swing center side, and when the swing arm swings up and down, This is a part where the amount of vertical swing is small. For this reason,
The spaces located above and below the rear part 32, 34 are areas that are less restricted by the swinging of the swing arm.

Therefore, when the heat exchanger is provided vertically in the space located above and below the rear portion 32.34 as described above, its vertical dimension can be made sufficiently long, and
With the shape having these vertical dimensions, the dimension in the vehicle width direction can also be made sufficiently long.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIGS. 1 and 2 show a first embodiment of the present invention.

In FIGS. 1 and 2, l is a motorcycle, 2 is a body frame, a front wheel suspension device 3 is attached to the front part of this body frame 2, and a front wheel 4 can be freely steered on this front wheel suspension device 3. is supported by. Further, above the front wheel suspension device 3, a handle 5 is supported by the vehicle body frame 2. Additionally, 7 is an engine, and 8 is a fuel tank.

The vehicle body frame 2 has a pair of left and right main frames 10.10.
These left and right main frames 10. The lOs are rigidly connected to each other by cross members (not shown). Further, a steering frame 11 having a triangular shape in side view and projecting forward and upward is detachably connected to the front part of the main frame 10, and a head vibrator 12 is attached to the protruding end of the steering frame 11. The handle 5 is supported on the handle 5.

The front wheel suspension system 3 is of a so-called double wishbone type and has a steering knuckle 14, on the lower end of which the front wheel 4 is supported. On the other hand, a lower arm 15, which is a swing arm, is supported at the front lower part of the left and right main frames 10.10 so as to be vertically swingable by a pivot shaft 16, and a lower ball joint is attached to the front swing end of the lower arm 15. The lower end of the steering knuckle 14 is pivotally supported by 17.

Further, at the front upper part of the main frame 10.10, an upper arm 18, which is a swing arm that opens rearward in a bifurcated shape, is supported by a pair of left and right pivot shafts 19.19 so as to be vertically swingable. The upper end of the steering knuckle 14 is pivotally supported at the front swing end of the upper arm 18 by an upper ball joint 20. In other words, the lower arm 1
5 and the upper arm 18 constitute a parallel link,
This is the steering knuckle 14 and the main frame 10.1
It is supported so that it can freely swing up and down with respect to 0. The steering knuckle 14 is rotated around the axis connecting the lower ball joint 17 and the upper ball joint 20, that is, the steering axis.
can be steered with the front wheels 4. In the above case,
The cylinder part of the engine 7 is the pivot shaft 1 of the upper arm 18.
It is located 6 behind 9.

A shock absorber 22 is installed between the front upper part of the main frame 10 and the lower arm 15, and this shock absorber 22 holds the lower arm 15 in a predetermined posture, that is, the steering knuckle 14 in a predetermined posture, and also holds the lower arm 15 in a predetermined posture. , absorbs the impact that is about to be transmitted from the front wheels 4 to the vehicle body frame 2 side.

A telescopic interlocking means 24 is interposed between the steering knuckle 14 and the handle 5. This interlocking means 24 is composed of a pair of sliding shafts 25.25 attached to the handle 5 and a case 26 attached to the upper end of the steering knuckle 14. It is slidably inserted into the

When the steering wheel 5 is operated, the front wheels 4 are steered around the steering axis via the interlocking means 24 and the steering knuckle 14. Furthermore, when the steering knuckle 14 swings up and down, such as when driving, the sliding shaft 25.25 and the case 26 slide relative to each other, absorbing changes in the relative vertical positions of the steering knuckle 14 and the handle 5. It is now possible to do so.

Note that springs are interposed between the steering knuckle 14 and the case 26, and between the handle 5 and each sliding shaft 25°25, and these springs are connected to the steering knuckle 14, the handle 5, and the sliding shafts 25, 25, respectively. Interlocking means 2
It absorbs the change in relative slope of 4.

In the space between the vehicle body frame 2 and the steering knuckle 14, an upper radiator 28, a lower radiator 29, and an oil cooler 30, which are heat exchangers, are provided. Of these, each of the radiators 28 and 29 is for cooling the cooling water for the engine 7. Also,
The oil cooler 30 is for cooling lubricating oil.

In the above case, the upper radiator 28 is arranged vertically in the upper space 33 located above the rear part 32 of the upper arm 18. On the other hand, the lower radiator 29 is arranged vertically in a hollow space 35 located below the rear part 32 of the upper arm 18 and above the rear part 34 of the lower arm 15. , is detachably supported at the front part of the vehicle body frame 2.

Further, the oil cooler 30 is arranged vertically in a lower chamber space 36 located below the rear part 34 of the lower arm 15, and is detachably supported at the front lower part of the vehicle body frame 2. There is.

By the way, each of the rear parts 32 and 34 of the lower arm 15 and the upper arm 18 is a part that is pivotally supported on the front part of the vehicle body frame 2 so as to be able to swing vertically, that is, on the swing center' side, and the lower arm 15 and the upper arm 18 are As shown by the arrow in FIG. 1, this is a portion where the amount of vertical swing is small when swinging up and down. Therefore, the upper space 33, the middle space 35, and the lower space 36 located above and below each of the rear portions 32, 34 are portions that are less restricted by the swinging of the lower arm 15 and upper arm 18.

Since each heat exchanger is arranged vertically in the space as described above, the vertical dimensions of the upper radiator 28, lower radiator 29, and oil cooler 30 are made sufficiently long, and the vertical dimensions are While keeping the enlarged shape,
Furthermore, even if the dimensions in the vehicle width direction are made sufficiently long so that the side portions extend outward from the respective rear portions 32 and 34, thereby ensuring sufficient capacity for each heat exchanger,
These heat exchangers are prevented from interfering with lower arm 15 and upper arm 18.

The upper arm 18 has sufficient rigidity due to its bifurcated shape, and the upper arm 18 can be detached from the vehicle body frame 2 without removing the upper radiator 28 or the lower radiator 29. It is now possible to do so.

Furthermore, when the lower arm 15 and the upper arm 18 swing upward, the front wheel 4 is rotated as shown by the imaginary line in FIG.
Since the upper radiator 28 and the lower radiator 29, which are arranged in a vertical position, will follow the swing locus of the front wheel 4, there is no fear of interference with the front wheel 4.

Moreover, since the vehicle is exposed to the wind while the vehicle is running, the cooling effect can be improved. In addition, 38 is a cowling.

The following figures show other embodiments. The basic configuration and operation of each of these embodiments are the same as those of the above-mentioned embodiments, so the common configurations are simply given their reference numerals in the drawings and their explanations are omitted, and only the different configurations and operations will be explained.

(Second example) 3 and 4 show a second embodiment.

According to this, the radiator 28 has a vertically elongated shape, and intersects the rear part of the upper arm 18 almost perpendicularly in a side view. At this intersection, in order to avoid interference between the radiator 28 and the upper arm 18, a recess 39 is formed in the side surface of the radiator 28, as shown by the solid line in FIG. 3 and in FIG. There is.

In this case, since the rear part of the upper arm 18 has a small amount of vertical swing, and the radiator 28 is in a vertical position, the recess 39 can be made small. A predetermined capacity is to be secured.

Note that the radiator 28 may have a width smaller than the width between the two forked members of the upper arm 18.

Further, the radiator 28 is similar to the first embodiment, and the radiator 28 is connected to the front wheel 4.
It is in a nearly vertical posture along the vertical swing trajectory of the rear surface. Therefore, the radiator 28 receives the wind from the front of the vehicle, improving its cooling effect. Moreover, from this, the radiator can be downsized. Furthermore, as mentioned above, by placing the radiator in a nearly vertical position or downsizing it, the dimension between the vehicle body frame 2 and the steering knuckle 14 can be narrowed, which has the advantage of shortening the wheelbase accordingly. .

FIG. 5 shows a modification of this embodiment, in which the radiator 28 has a left radiator 38a and a right radiator 38b.
An oil cooler 30 is provided between them, and the rear part of each branch arm of the upper arm 18 passes between the adjacent radiators 38a, 38b and the oil cooler 30.

Note that in this embodiment as well, each of the radiators 37a, 37
b, 37c without removing them from the body frame 2 side,
The upper arm 18 can be attached to and detached from the vehicle body frame 2.

(Third example) FIG. 6 shows a third embodiment.

According to this, the radiator 28 is disposed across the middle space 35 and the lower space 36 located above and below the rear part of the lower arm 15. On the other hand, the oil cooler 30 is provided in an upper space 33 at the rear of the upper arm]8.

Incidentally, a fan 40 is attached to the front surface of the radiator 28 to forcibly send running air to the radiator 28. However, this fan 40 may not be provided.

(Fourth example) FIG. 7 shows a fourth embodiment.

According to this, the front wheel suspension device 3 is of a so-called strut type, and in this case, the upper arm 18 and the shock absorber 22 of the first embodiment are removed, and in their place, another shock absorber 46 is provided. It is being

The shock absorber 46 is composed of a cylinder 47 and a spring 49 that biases the cylinder 47 in the direction of extension.The cylinder tube 47a of the cylinder 47 is fixed to the upper end of the steering knuckle 14, and the cylinder tube 47a is fixed to the upper end of the steering knuckle 14. A piston rod 47c extending from a piston 47b inside is connected to the handle 5.

The cylinder 47 absorbs and buffers the vertical swing of the steering knuckle 14 by its expansion and contraction, and at the same time, the two cylinders 47 are The handle 5 and the steering knuckle 14 are relatively positioned in the radial direction.

When the handle 5 is steered, the front wheels 4 are steered via the upper link 43, the lower link 44, and the steering knuckle 14. Further, when the steering knuckle 14 swings up and down, the upper link 43 and the lower link 44 rotate relative to each other around the pivot shaft 42 and bend.

In the above configuration, the radiator 28 is provided in the upper space 33 located above the rear part 34 of the lower arm 15. Further, an oil cooler 30 is provided in a lower chamber space 36 located below the rear portion 34.

Further, the radiator 28 is in a substantially vertical posture along the vertical swing locus of the rear surface of the front wheel 4. This effect is similar to that described in the second embodiment.

(Effects of the Invention) According to the present invention, the rear part of the swing arm is a part that is pivotally supported by the front part of the vehicle body frame so as to be able to swing up and down, and the amount of vertical swing is small. The heat exchanger is installed vertically in the space located below. Therefore, the vertical dimensions of this heat exchanger can be made sufficiently long, and the shape of the vertical dimensions can also make the dimensions in the vehicle width direction sufficiently long. Therefore, sufficient capacity can be ensured in the heat exchanger, so that a sufficient heat exchange effect can be obtained.

(Margin below)

[Brief explanation of drawings]

The figures show an embodiment of the invention, and FIGS. 1 and 2 show the first embodiment, with FIG. 1 being a front side view of the motorcycle and FIG. 2 being a perspective view of the part shown in FIG. 1. , FIG. 3 and FIG. 4 show the second embodiment, FIG. 3 is a view corresponding to FIG. 1, FIG. 4 is a perspective view of the upper arm and radiator, and FIG. FIG. 6 is a perspective view of a third embodiment, which corresponds to FIG. 1, and FIG. 7 is a fourth embodiment, which corresponds to FIG. 1. 1. Motorcycle, 2. Body frame, 3. Front wheel suspension, 4. Front wheel, 5. Handle, 14. Steering knuckle, 15. Lower arm (swing arm), 18. Upper arm (swing). Arm), 28・
・Upper radiator (heat exchanger), 29...Lower radiator (
heat exchanger), 30... oil cooler (heat exchanger), 32
- Rear, 34...rear. Figure 2 1') (-

Claims (1)

[Claims] 1. The rear part of the swing arm extending in the longitudinal direction is pivotally supported to the front part of the vehicle body frame so as to be able to swing vertically, and the steering knuckle for the front wheel is supported at the front swing end of the swing arm, and the steering knuckle for the front wheel is supported on the front swing end of the swing arm. A heat exchanger arrangement for a motorcycle in which a heat exchanger is disposed between the knuckle and the heat exchanger in a space above and below the rear of the swing arm in a vertical position. construction structure.