JPH068279Y2 - Crankshaft rotation structure from outside the engine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a crankshaft rotating structure from the outside of an engine using an intermediate shaft of a starter device.

(Prior Art) In a straddle-type four-wheeled vehicle in which an engine incorporating a mission mechanism is mounted substantially in the center of a vehicle body, a transmission mechanism to a rear wheel is provided at a rear end of an engine side portion in connection with the mission mechanism, Japanese Unexamined Patent Publication (Kokai) No. 60-234028 discloses a four-wheel drive mechanism in which the transmission mechanism to the rear wheels and the transmission mechanism to the front wheels are connected via a power transmission shaft arranged on the side of the engine.

Specifically, the power transmission shaft is arranged on the crankshaft extension line on the side of the engine.

(Problems to be solved by the invention) Generally, when the crankshaft is manually rotated from the outside to adjust the engine such as tappet clearance of the valve train, the flywheel is fixed to the end of the crankshaft. Although the crankshaft is directly rotated by inserting a tool from the side of the engine, if the vehicle body components such as the power transmission shaft are arranged on the extension line of the crankshaft on the side of the engine as described above, such manual rotation can be performed. It's gone.

Therefore, an object of the present invention is to use an intermediate shaft of a starter device provided in the engine so that a crankshaft can be easily manually rotated even for an engine in which body parts are arranged on an extension line of the crankshaft. It is to provide a crankshaft rotating structure from the outside.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a vehicle body component (26) arranged laterally of an engine (11) on an extension line of a crankshaft (12), and In a vehicle including a starter device (31) in (11), an intermediate shaft (41) for decelerating and transmitting the power of the starter device (31) to the crankshaft (12) is provided inside the engine (11), The intermediate shaft (41) is arranged in parallel with the crankshaft (12), and an extension line of the intermediate shaft (41) is arranged so as not to intersect with the vehicle body component (26), and further, the engine. A tool insertion hole (52) for external rotation input is formed at a portion of the side surface of (11) that coincides with the extension line of the intermediate shaft (41), and a crank is provided on the same side surface as the tool insertion hole (52). Axis (12) It is characterized by the formation of a peep window through which the rotation of can be seen.

(Function) Remove the caps (53) and (59) to insert the insertion hole (5
While inserting the tool from 2) and manually rotating the intermediate shaft (41), the crank shaft (1
2) can be rotated from the outside. Therefore, on the extension of the crankshaft (12) on the side of the engine (11), the body component (2
Even in a vehicle in which 6) is arranged, the crankshaft (12) can be easily rotated manually when adjusting the engine such as the tappet clearance.

(Examples) Examples will be described below with reference to the accompanying drawings.

1 and 2 are the same perspective views as the perspective view of a saddle type four-wheeled vehicle. (1) is a body frame, (11) is an engine, (2) is a bar handle, and (3) is a rear wheel. , (5) is the front wheel, the body frame
The engine (11) is installed approximately in the center of (1), and the engine (1
A seat (not shown) is placed on the frame (1) above the rear part of 1). The left and right rear wheels (3), (3) are suspended and supported by the swing arm suspension (4) at the rear of the frame (1), and the left and right front wheels (5), (5) are independent suspension suspensions (6). ,
They are suspended and supported at the front of the frame (1) at (6).

FIG. 3 is a side view of the engine (11). The engine (11) has a mission mechanism incorporated therein as shown in FIG.
That is, behind the crankshaft (12), a main shaft (13) and a sub shaft (15) to which power is transmitted via a clutch (not shown) are arranged,
The transmission gear mechanism (14) on both shafts changes the speed
Power is output to (15) and the bevel gear (1
A main drive shaft (18) is provided which meshes at right angles via 6) and (17). The main drive shaft (18) is supported in a side gear case (19) provided at the rear end of the side portion of the engine (11), and a rear wheel propulsion shaft (not shown) is provided at the rear end of the main drive shaft (18). Be connected.

In addition, the front gear case (2
1) is provided, and the subordinate drive shaft (22) is coaxially supported in the front gear case (21) with the main drive shaft (18), and the subordinate drive shaft (22) is attached to the front gear case (21). An output shaft (25) meshing in parallel is supported via gears (23) and (24).
(25) is arranged on the center line of the vehicle width and connected to the front wheel propulsion shaft (7), and the front end of this propulsion shaft (7) has a front differential case (8).
Be incorporated into.

The main drive shaft (18) and the sub drive shaft (22) are connected to the engine (1
1) A power transmission shaft (26) that is connected laterally is provided, and the front and rear ends of the power transmission shaft (26), which is a component of this vehicle body, are connected to the main drive shaft via pipe joints (27) and (27), respectively. (18) The front end and the rear end of the driven shaft (22) are connected by spline fitting. The power transmission shaft (26) is arranged on an extension line of the crankshaft (12), and (28) is a shaft cover thereof.

In the above, the cell starter device (31) is provided in the rear part of the engine (11) as shown in FIG. The cell starter device (31) includes a cell motor (32) arranged parallel to the crankshaft (12), a first reduction shaft (36) meshing with an output shaft (33) of the cell motor (32) through reduction gears (34), (35). ), This and reduction gear (37), (3
The second reduction shaft (41) meshing via 8), and the reduction gear of this
It consists of a starter driven gear (44) that meshes with (43) and a one-way clutch (45). The starter driven gear (44) is rotatably installed on the crankshaft (12),
The one-way clutch (45) is screwed to the flywheel (47) fixed to the end with bolts (46), and the one-way clutch (45) is connected only when power is transmitted from the starter driven gear (44) side. , (48) is ACG. Here, the one-way clutch (45) is activated when the rotational speed of the starter driven gear (44) exceeds the rotational speed of the crankshaft (12) in the rotational direction of the crankshaft (12) to connect power. is there.

Then, the starter motor (32), the first reduction shaft (36) and the second reduction shaft
(41) are arranged above the power transmission shaft (26), and are supported at their outer ends by reduction covers (51) mounted on the side surfaces of the engine (11), respectively.
A tool insertion hole (52) is formed in this. That is, in both of the reduction shafts forming the intermediate shaft, in the embodiment, the insertion hole (52) is formed at a portion corresponding to the extension line of the second reduction shaft (41), and the insertion hole (52)
A square hole (42) for inserting a tool, such as a hexagon, is formed on the outer end surface of the second reduction shaft (41) supported inside. Such a square hole (4
The insertion hole (52) exposed by 2) is closed by a screw-in type cap (53), and further, in the embodiment, as shown in FIG.
An outer cover (55) is provided on the outside of 1).
A small window (56) that allows the cap (53) to be attached and detached is formed in the (55).

Further, a side cover (58) is provided on the side surface of the engine (11) inside the power transmission shaft (26), and the cap (59) is screwed into the observation window formed on the upper side of the side cover (58). When the cap (59) is removed, the alignment mark (not shown) for adjusting the tappet engraved on the outer peripheral end surface of the flywheel (47) can be confirmed.

With such an engine structure, if the cap (53) is removed and a tool is inserted into the square hole (42) of the second reduction shaft (41) and rotated, the reduction gear (43) and starter driven gear (4)
4) The crankshaft (12) can be manually rotated via the one-way clutch (45) and the flywheel (47). Therefore, as in the embodiment, the crankshaft (12) is located on the side of the engine (11).
Even if the power transmission shaft (26) is arranged on the extension line, the crankshaft (12) can be easily rotated manually when the tappet clearance is adjusted.

Further, by removing the other cap (59), the operator can perform manual rotation and adjustment confirmation from the same direction, which is convenient in terms of maintenance.

By the way, in the embodiment, the second side closer to the crankshaft is used.
Although the manual rotation is input to the speed reducing shaft, it may be input to the first speed reducing shaft, and this structure is not limited to tappet adjustment and can be applied to other engine adjustments. Further, the vehicle body structural parts are not limited to the power transmission shaft as in the embodiment but include other devices and the like, and the starter device is not limited to the cell starter and may be a kick starter.

(Effect of the Invention) As described above, according to the present invention, the crankshaft can be rotated or held by a small angle by a small force by the deceleration action of the intermediate shaft that is the reduction shaft of the starter device. Therefore, by using the intermediate shaft of the starter device, the flywheel fixed to the crankshaft can be manually turned slowly by a small angle from the outside, and the cap (59) can be removed to check the alignment mark while looking into the observation window. It is possible to easily perform engine adjustment operations such as checking the tappet clearance.

[Brief description of drawings]

1 and 2 are the same perspective views as the perspective view of a saddle-type four-wheeled vehicle, FIG. 3 is a side view of an engine in which essential parts are broken away, and FIG. 4 is a transverse plan view thereof. The figure is a cutaway plan view of the crankshaft rotating structure portion. In the drawing, (11) is an engine, (12) is a crankshaft, and (26)
Is a vehicle body component, (31) is a starter device, (41) is a reduction shaft (intermediate shaft), (42) is a square hole, (52) is a tool insertion hole, and (53) is a cap.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Masanori Masumura 1-4-1 Chuo, Wako-shi, Saitama Inside Honda R & D Co., Ltd. (56) Reference JP-A-60-60268 (JP, A) JP Sho 60-234028 (JP, A) Actual opening Sho 56-157328 (JP, U) Actual opening Sho 59-156823 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A vehicle in which vehicle body constituent parts are arranged on an extension of a crankshaft on the side of an engine and a starter device is provided in the engine, and an intermediate shaft for decelerating and transmitting power of the starter device to the crankshaft. Is provided inside the engine, the intermediate shaft is arranged in parallel with the crankshaft, and the extension line of the intermediate shaft is arranged so as not to intersect with the vehicle body component, and further, on the side surface of the engine, the intermediate shaft is provided. An engine characterized in that a tool insertion hole for inputting rotation from the outside is formed in a portion corresponding to the extension line of the shaft, and a viewing window is formed on the same side as the tool insertion hole so that the rotation of the crankshaft can be visually observed. External crankshaft rotation structure.