JP2772822B2 - Starting device for vehicle engine - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a starting apparatus for a vehicle engine having a kick starter, wherein the kick starter can be easily converted to another starter.

2. Description of the Related Art Some snowmobiles, which are examples of vehicles, employ a kick starter as an engine starter (for example, Japanese Patent Application No. 62-49058 and drawings).

(Problems to be Solved by the Invention) By the way, in cold weather, the engine is difficult to start. Therefore, at this start, it is preferable to rotate the crankshaft as much as possible four to five times by one start operation. However, according to the kick starter described above, it is possible to rotate at most about two times by one start operation. Therefore, with the above-described conventional configuration, a sufficiently satisfactory start may not be performed in some cases.

(Purpose of the Invention) The present invention has been made in view of the above-mentioned circumstances, and enables a kick starter to be easily converted to another starter so that a starting operation that meets various conditions such as cold weather can be performed. The purpose is to enable easy selection.

(Constitution of the Invention) A feature of the present invention for achieving the above object is that in a vehicle provided with a transmission case that covers a crankshaft and a power transmission system that transmits the power of the crankshaft, An opening is formed in the transmission case corresponding to the shaft end, a cover body for opening and closing this opening is detachably provided in the transmission case, and a kick starter component for cranking the crankshaft is provided on the cover body. The kick starter is mounted as a unit, and the kick starter is integrally detachable from the transmission case by attaching and detaching the cover to and from the transmission case.

(Operation) The operation of the above configuration is as follows.

A cover pair for opening and closing the opening 54 formed in the transmission case 31
A kick starter 58 for cranking the crankshaft 28 is provided as a unit including the cover 55. When the cover 55 is removed from the transmission case 31, the kick starter 58 is integrally removed from the transmission case 31.

The opening 54 opened by removing the kick starter 58 is formed corresponding to the left end (shaft end) 36 of the crankshaft 28. Therefore, the left end of the crankshaft 28 ( Another starter such as a coil starter can be easily connected to the shaft end 36.

When a coil starter is connected to the left end (shaft end) 36 of the crankshaft 28, the crankshaft 28 can be rotated four to five times by one start operation due to the characteristics of the starter. it can.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

In FIG. 2, reference numeral 1 denotes a snowmobile, which is a vehicle. The snowmobile 1 has a body frame 2 framed by a circular pipe.

A pair of left and right front arms 3 are pivotally supported at the front part of the body frame 2 so as to be vertically swingable, and a ski 4 is supported at the swinging end of the front arm 3 so as to be steerable about a vertical axis. . A steering shaft 6 is rotatably supported on the front of the vehicle body frame 2 around its axis. A lower end of the steering shaft 6 is connected to the ski 4 side by a pair of left and right relay rods 7. I have. On the other hand, a bar type handle 8 is attached to the upper end of the steering shaft 6. Further, a shock absorber 9 is provided between the body frame 2 and the rotating end of the front arm 3.

On the other hand, a rear arm 10 is pivotally supported in the front and rear halfway of the vehicle body frame 2 in a vertically swingable manner, and a slider 11 is pivotally supported at a swing end of the rear arm 10. Wheels 12,12 are supported.

Reference numeral 14 denotes an engine. A power transmission device 15 is connected to a rear portion of the engine 14, and the engine 14 and the power transmission device 15 are connected.
Are firmly supported by the body frame 2. A drive wheel 17 is attached to an output shaft 16 of the power transmission device 15, and the drive wheel 17 and the slider 11,
Endless track belt 18 is wound around 2,12.

Further, a carburetor covered with a cab case 20 is connected to the engine 14, and the carburetor further includes an air cleaner 21.
Are connected. A rider's seat 22 is attached to a rear portion of the vehicle body frame 2, and a vehicle body cover 23 that covers the vehicle body frame 2 from the front and both right and left sides is provided.

When the engine 14 is operated and this power is transmitted to the endless track belt 18 via the power transmission device 15 and the like, the snowmobile 1 can run by the endless track belt 18 rotating on the snow upper surface 24. It is said.

When the steering wheel 8 is steered, each ski 4 is steered via a steering shaft 6 and a relay rod 7 which are linked to the steering wheel 8. In this case, the shock absorber 9 is moved from the ski 4 Shock that is transmitted to the vehicle body frame 2 is damped.

1 and 2, the engine 14 is a four-stroke engine having a crankshaft 28 supported by a crankcase 27 and a connecting rod 29 connected thereto.

On the other hand, the power transmission device 15 has a transmission case 31, and the transmission case 31 covers a power transmission system that transmits the power of the crankshaft 28 to the drive wheels 17 side. The transmission case 31 has a case body 32 integrally formed with the crankcase 27, extends rearward of the case body 32, and has an open left side surface. Further, a case cover 33 for closing the opening is provided, and the case cover 33 is detachably screwed to the case main body 32 by bolts.

The left end 36, which is the shaft end of the crankshaft 28, is housed in the front of the transmission case 31, and a drive pulley 37 is screwed to the drive case 31 with a nut 38. Meanwhile, the case body
An inner cover 39 is screwed to the rear of the unit 32 with bolts 40. An intermediate shaft 42 is supported by the inner cover 39 and the rear portion of the case cover 33, and a driven pulley 43 is supported on the intermediate shaft 42 so as to be relatively rotatable. A V-belt 44 is wound around the driving pulley 37 and the driven pulley 43.

The drive pulley 37 is configured so that the engagement diameter with the V-belt 44 increases with the action of the weight 45 as the speed increases, while the driven pulley 43 has the engagement diameter with the bias force of the spring 47. It is configured to increase.

Therefore, when the speed of the crankshaft 28 is low, the V-belt 44 engages the drive pulley 37 with a small engagement diameter and engages the driven pulley 43 with a large engagement diameter as shown in FIG. That is, the reduction ratio is large. Also,
When the speed of the crankshaft 28 is increased, the weight 45 causes the engagement diameter of the drive pulley 37 to increase against the spring 47 due to the centrifugal force generated in the weight 45. For this reason, the engagement diameter of the driven pulley 43 is reduced, that is, the reduction ratio is reduced, and the driven pulley 43 is accelerated.

A centrifugal clutch is provided between the driven pulley 43 and the intermediate shaft 42.
48 are provided. The space defined by the case body 32 and the inner cover 39 accommodates a gear reduction unit 49, and an input gear 50 of the gear reduction unit 49 is formed on the intermediate shaft 42, while an output gear The output shaft 16 is attached to 51.

Therefore, the power of the crankshaft 28 is first supplied to the drive pulley
37, a V-belt 44, and a driven pulley 43, which are transmitted to a centrifugal clutch 48. When the centrifugal clutch 48 reaches a predetermined angle, the centrifugal clutch 48 is connected, and this power is transmitted to the intermediate shaft 4
2, and transmitted to the output gear 51 via the gear reduction means 49, and further transmitted to the output shaft 16 from here.

In the above configuration, an opening 54 is formed in the case cover 33 so as to correspond to the left end 36 of the crankshaft 28. Also,
A cover pair 55 for opening and closing the opening 54 is provided, and the cover body 55 is detachably attached to the case cover 33 by bolts 56.

A component of a kick starter 58 for cranking the crankshaft 28 is attached to the cover body 55, and the kick starter 58 is unitized including the cover body 55.

That is, a kick shaft 59 is supported by the cover body 55, and a kick pedal 60 is attached to the kick shaft 59.
An intermediate shaft 61 is supported on the cover body 55 coaxially with the crankshaft 28, and the intermediate shaft 61 is
Gear means 62 and the gear means 62
An engagement body 64 is attached to 62. On the other hand, the kick pedal 60 is urged upward by a spring 63.

On the other hand, at the left end 36 of the crankshaft 28, an engaged body 65 which is detachable from the engaging body 64 is fastened together by the nut 38. Further, a spring 66 for urging the engaging body 64 so that the engaging body 64 does not engage with the engaged body 65 is provided.

Normally, the engaging body 64 is separated from the engaged body 65, and only when the kick pedal 60 is vigorously depressed against the spring 63, the engaging body 64 is opposed to the spring 66. It moves toward the side and engages with the engaged body 65.

Therefore, in the normal state where power is transmitted from the crankshaft 28 to the output shaft 16, power is not transmitted from the crankshaft 28 to the kick starter 58.

Meanwhile, trying to start the engine 14, the kick pedal
When vigorously stepping on 60, the gear means 62, the engaging body 6
The pedaling power is transmitted to the crankshaft 28 via the engaging body 4 and the engaged body 65 engaged with the engaging body 64, whereby cranking is performed.

When the kick pedal 60 is not used, the pedal 68 moves toward the transmission case 31 as shown by the phantom line in FIG.
By rotating, this can be stored.

In the above configuration, the kick starter 58 can be integrally attached to and detached from the case cover 33 by attaching and detaching the cover body 55 to and from the case cover 33. When the kick starter 58 is removed, the opening 54 is opened, and another starter can be attached to the left end 36 of the crankshaft 28 through the opening 54.

In FIGS. 3 and 4, the other starter described above is a manually operated coil starter 70. The coil starter 70 has a drum 71. The drum 71 is attached to the crankshaft 28 by a screw hole 72 formed in the drive pulley 37 in advance and a bolt 73 screwed to the screw hole 72. A rope 74 is wound around the drum 71.

When the rope 74 is pulled vigorously as shown by the arrow in the figure, the drum 71 rotates, and accordingly, the cranking is performed. That is, when the coil starter 70 is attached as described above, one start operation
The crankshaft 28 can be rotated four to five times, i.e. more than with the kick starter 58.

1 and 2, there is provided a communication pipe 76 for communicating the air cleaner 21 with the transmission case 31.
The end of the transmission case 31 on the side of 76 is detachably connected to the cover body 55. Further, a fan 77 is integrally formed with the drive pulley 37, and the fan 77 operates with the rotation of the drive pulley 37.

When the fan 77 operates, outside air is introduced into the transmission case 31 through the air cleaner 21 and the communication pipe 76, and the air cools the drive pulley 37, the driven pulley 43, and the V-belt 44. Further, the air after cooling them is discharged from a discharge port (not shown) formed at the rear end of the transmission case 31.

As shown in FIG. 3, when the coil starter 70 is attached to the transmission case 31 instead of the kick starter 58 and the fan 77 is operated with the drive pulley 37, the opening edge of the opening 54 and the drum 71 The outside air 78 is introduced into the transmission case 31 through the gap between the outer case 78 and the outer peripheral surface of the case, which cools the V-belt 44 and the like as described above.

Although the above description is based on the illustrated example, the present invention may be applied to other vehicles such as motorcycles. Further, the coil starter 70 requires a work of winding the rope 74 around the drum 71 each time the coil starter is started, which is complicated.
May be a recoil starter that does not require the above operation.

(Effects of the Invention) According to the present invention, a cover body that opens and closes an opening formed in a transmission case is provided, and a kick starter for cranking a crankshaft is formed into a unit including the cover body. When the cover is removed from the case, the kick starter is integrally removed from the transmission case. For this reason, the work of removing the kick starter is significantly easier than removing each component of the kick starter from the transmission case individually.

Also, since the opening opened by removing the kick starter is formed corresponding to the shaft end of the crankshaft, it is easy to connect another starter such as a coil starter to the shaft end of the crankshaft through the opening. Can be.

When a coil starter is connected to the shaft end of the crankshaft, for example, the crankshaft can be rotated more by a single start operation than by the kick starter. The starting operation that meets the above conditions can be easily selected and convenient.

[Brief description of the drawings]

FIG. 1 shows an embodiment of the present invention, and FIG.
FIG. 2 is an overall side view of the snowmobile, FIG. 3 is a view corresponding to a part of FIG. 1, and a view in which a coil starter is mounted, and FIG. 4 is an IV in FIG. FIG. 4 is a sectional view taken along the line IV. 1 ... snowmobile (vehicle), 14 ... engine, 28 ... crankshaft, 31 ... transmission case, 36 ... left end (shaft end), 54 ...
… Opening, 55 …… Cover body, 58 …… Kick starter, 70…
... Coil starter.

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) F02N 3/04 F02N 3/02 F02B 67/00

Claims (1)

(57) [Claims] In a vehicle provided with a transmission case for covering a crankshaft and a power transmission system for transmitting power of the crankshaft, an opening is formed in the transmission case corresponding to the shaft end of the crankshaft. A cover body for opening and closing the cover is detachably provided on the transmission case, and a kick starter component for cranking the crankshaft is attached to the cover body to make the kick starter a unit, and the cover body is attached to and detached from the transmission case. A kick-start device for a vehicle engine in which the kick starter is integrally detachable from the transmission case.