JPH02197479A - Battery arranging structure for motorcycle - Google Patents

Abstract

PURPOSE:To prevent a battery from temperature rise while contriving the concentration of mass of a car body and the lowness of the center of gravity by arranging the battery in the vicinity of the bottom surface of a crankcase, in the case of a motorcycle provided with an exhaust pipe extending toward the rear in the upper of the crankcase of an engine. CONSTITUTION:In the case of a motorcycle in which an exhaust pipe is provided protrusively toward the rear from the rear surface side of an engine, tightened by a bolt to a main frame and a rear arm bracket 6 in a car body frame, and extending toward the rear in the upper of a crankcase 20 of the engine, a case 34 is arranged in the vicinity of a bottom side of the crankcase 20 and between this bottom side and the lower part of a side part cowl 29b. This case 34 is constituted of a case body 35 with a section opened in U-shape, and the inside of the case 34 is divided into three chambers 42 to 44 by a partitioning wall 41. The case uses its front and intermediate chambers 42 and 43 for storing tools and the rear chamber 44 for storing a battery 46, and the chambers can be closed respectively by covers 47, 48.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a battery arrangement structure for a motorcycle.

(Prior Art) Conventionally, the exhaust pipe of an engine in a motorcycle is formed so that it once protrudes forward from a cylinder and then is folded back toward the rear, and then extends rearward through the lower part of the crankcase of the engine. (e.g. Japanese Patent Application No. 1987-74497 and drawings),
In this configuration, there is usually a surplus space above the crankcase, so the battery is disposed in this space.

(Problem to be Solved by the Invention) By the way, from the point of view of exhaust efficiency, it is preferable to exhaust the exhaust gas from the engine directly backward from the cylinder as straight as possible.

If the above-mentioned structure is configured in this way, the exhaust pipe will pass above the crankcase, and since the exhaust pipe has a large volume, the placement position of the battery will be greatly restricted.

In this case, since the battery is heavy, if the battery is placed away from the crankcase, the mass concentration of the vehicle may be hindered, and the center of gravity of the vehicle may be moved upward. There is also a risk that it may move.

In addition, from this point of view, if the exhaust pipe and battery are arranged closely in the space above the crankcase in an attempt to install the battery in a suitable position, the problem arises that the battery is heated by the exhaust pipe.

(Purpose of the Invention) This invention was made with attention to the above-mentioned circumstances, and even when an exhaust pipe is provided that extends rearward above the engine crankcase, the mass concentration of the vehicle body and the low center of gravity can be avoided. The purpose is to ensure that the temperature of the battery is maintained at a sufficiently low temperature.

(Structure of the Invention) A feature of the present invention for achieving the above object is that, in a motorcycle provided with an exhaust pipe extending rearward above the crankcase of the engine, a battery is installed near the bottom surface of the crankcase. It is at the point where it is placed.

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

In FIGS. 1 to 3, l is a motorcycle and 2 is its body frame. The vehicle body frame 2 has a head vibrator 3 at the front thereof, and a pair of left and right main frames 4.4 extend rearward and downward from the head vibrator 3, and extend downward from the rear end of each main frame 4. The rear arm bracket 6 extends. Further, the lower ends of these left and right rear arm brackets 6.6 are firmly connected to each other by a cross member 7. Furthermore, the main frame 4
A seat rail 8 extends rearward and upward from the rear end, and a back stay 9 is provided to reinforce the seat rail 8.
The seat rail 8 supports the seat 1-10.

A front fork 11 is supported on the head vibrator 3 so as to be steerable. A front wheel 12 is supported at the lower end of the front fork 11, and a handle 13 is attached to the upper end of the front fork 11. On the other hand, a rear arm 16 is pivotally supported on the left and right rear arm brackets 6.6 by a pivot shaft 15 so as to be vertically swingable, and a rear wheel (not shown) is supported at the swinging end of the rear arm 16.

Reference numeral 18 denotes a two-stroke parallel two-cylinder engine, and this engine 18 is fastened to the main frame 4 and rear arm bracket 6 with bolts 19. The engine 18 has a crankcase 20 containing a crankshaft, and a pair of left and right cylinders 21 that protrude upward and forward from the crankcase 20. A carburetor 22 is attached to the front side of each cylinder 21, and a surge tank 23a is attached to both carburetors 22, and this surge tank 23a also connects upward to the intake pipe 2.
3 extends, and an air cleaner 24 is attached to the upper end of this intake pipe 23.

On the other hand, an exhaust pipe 26 is provided to protrude rearward from the rear surface side of the cylinder 21 . This exhaust pipe 26 is connected to the crankcase 2
0 and extends rearward, passing between the left and right rear arm brackets 6.6.

A fuel tank 27 for supplying fuel to the carburetor 22 is provided. This fuel tank 27 is supported on the main frame 4.4 and the seat rail 8, and a recess 27a is formed in the lower front surface of the fuel tank 27, and the air cleaner 24 is housed in this recess 27a.

Further, 28 is a radiator, 29 is a resin cowling, and this cowling 29 is a front cowling 2 that covers the front of the vehicle body.
9a, and left and right side cowlings 29b, 29b extending rearward from both left and right sides of this front cowling 29a, and this cowling 29 is detachably attached to the vehicle body frame 2 side with bolts (not shown). ing. Each side cowl 29b is attached to the main frame 4. engine 1
8, covers the intake pipe 23, air cleaner 24, etc. from the outside. Further, the lower ends of the left and right side cowls 29b extend below the crankcase 20 and cover the lower surface of the crankcase 20, and these lower ends are removable by the connecting plate 32 and the port 33. are connected to each other.

1 to 9, a case 34 is provided close to the lower surface of the crankcase 20 and between this lower surface and the lower part of each side cowl 29b. The case 34 is made of elastic resin and has a case body 35 having a U-shaped cross section and opening toward the right in the vehicle width direction. The rear end of this case body 35 is removably screwed to a bracket 36 protruding from the cross member 7 with bolts 37, and the front and rear middle portions of the case body 35 are protruded from the lower surface of the crankcase 20. bracket 38
The case body 35 is removably screwed to the body frame 2 or the engine 18 by a fastening means 39.
It is removably attached firmly to the side.

4, 5, and 7, to explain the fastening means 39 in more detail, a support piece 39b is screwed to the bracket 38 by a bolt 39a, and at this time, a hole formed in the bracket 38 is screwed to the support piece 39b. A cut-and-raised piece protruding from the support piece 39b is inserted into the support piece 38a, so that the support piece 39b can be positioned before being screwed. Further, the lower end of this support piece 39b is attached to a bolt 39 that passes through a hole 39c formed in the case body 35.
d is screwed to the case body 35. The bolts 39a, 39d, support piece 39b, and hole 39c constitute the fastening means 39.

Hey, in the above case, each bolt 37.39d and case 3
Elastic grommets 40 are interposed between the casings 4 and 4, respectively, and these grommets 40 absorb vibrations transmitted from the vehicle body to the case 34.

The case body 35 is divided into three chambers, a front chamber 42, an intermediate chamber 43, and a rear chamber 44, by front and rear partition walls 41.41, of which the front chamber 42 and the intermediate chamber 43 are used for storing tools, and the rear chamber 44 A battery 46 is housed in. Furthermore, a front lid 47 and a rear lid 48 are integrally molded on the lower right edge of the case body 35, respectively. In this case, thin hinges 47a and 48a are formed at the connecting portions between the case body 35 and the front lid 47 and the rear lid 48, and the front lid 47 and the rear lid 48 can move up and down, respectively, around these hinges. It is said that

As shown by solid lines in FIGS. 1 to 7, when the front lid 47 is rotated upward, the front lid 47 closes the openings of the front chamber 42 and the intermediate chamber 43. On the other hand, if the front cover 47 is rotated downward as shown by the imaginary lines in FIGS. 6 and 7 and in FIG. 9, the opening is opened and tools can be taken in and taken out freely. There is. Further, as shown by the solid lines in FIGS. 1 to 5 and FIG.
4 openings are closed. If the upper rear cover 48 is rotated downward, as shown by the imaginary line in FIG. 8 and FIG.

Further, the front lid 47 and the rear M4B correspond to each chamber 4.
2.43.44 A rubber band 49 is provided for each lid 47.48 to hold it in that state when it is closed.

1, 3, 4, and 10 to 12, working holes 51 are formed in the right side cowl 29b corresponding to the respective openings of the front chamber 42 and the intermediate chamber 43. Ru. Further, an opening/closing lid 52 made of resin is provided to freely open and close this working hole 51. The front edge 52a of the opening/closing lid 52 can be engaged with the front edge 51a of the working hole 51 in a front-to-back insertion manner, and the rear edge 52b of the opening/closing lid 52 is connected to the rear edge 51b of the working hole 51 with a key means. 53, it can be locked.

Therefore, when attempting to take tools into or out of the front chamber 42 or the intermediate chamber 43, first unlock the key means 53, pull the opening/closing lid 52 backward, and move the opening/closing lid 52 as shown by the imaginary line in FIG. 52 and then open and close the front cover 47 through the working hole 51. Also, when trying to take the battery 46 in and out of the rear chamber 44, remove the right side cowl 29b and open and close the front cover 47 through the working hole 51. The above is based on the example shown, but the battery 46 is connected to the front chamber 4.
2 or the intermediate chamber 43, or the case 34 may be omitted; in this case, the crankcase 2 may be stored in the intermediate chamber 43.
0, the battery 46 may be directly attached to the lower surface with a bracket or the like.
may be extended to a point corresponding to the rear lid 48.

(Effects of the Invention) According to the present invention, in a motorcycle provided with an exhaust pipe extending rearward above the crankcase of the engine,
Since the battery is disposed near the bottom surface of the crankcase, the following effects can be obtained.

That is, the engine mounted on a motorcycle is a heavy object, and the center of gravity of the vehicle is usually located near the crankshaft contained in the crankcase.

Therefore, in the present invention, the battery is disposed near the bottom surface of the crankcase as described above, and since this battery is also heavy, it is possible to concentrate the mass of the vehicle. Furthermore, since the battery is provided on the lower surface of the crankcase, the center of gravity of the vehicle can be lowered.

Furthermore, as mentioned above, while the exhaust pipe is located above the crankcase, the battery is located below the crankcase, which prevents the battery from being heated by the exhaust pipe. . Moreover, since the lower surface side of the crankcase is usually the part through which the running wind passes with great force, there is an advantage that the battery is effectively cooled by the running wind.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which Figure 1 is a right side view of the front part of the motorcycle, Figure 2 is a simplified plan view of the front part of the same motorcycle, and Figure 3 is the nr - nr m arrow in Figure 1. Partial view, 4th
The figure is a partially enlarged sectional view of Fig. 1, Fig. 5 is a partially enlarged view of Fig. 2, Fig. 6 is a sectional view taken along the line ■-Vl in Fig. - ■ cross-sectional view of line arrow, Figure 8 is the same as above.
Figure 9 is a right side view of the open case, Figure 1O is a cross-sectional view taken along the line ■-■ in the figure, Figure 1O is Figure 3 (7) X-X! ! Fig. 11 is a view taken along the line -xr in Fig. 1O, and Fig. 12 is a view taken along the line -xn in Fig. 1O. l...Motorcycle, 18...Engine, 20...Crank case, 26...Exhaust pipe, 34...Case, 46...Battery.

Claims (1)

[Claims] 1. A battery arrangement structure for a motorcycle in which a battery is disposed near the bottom surface of the crankcase in a motorcycle provided with an exhaust pipe extending rearward above the crankcase of the engine.