JPH0343415Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a starting device for a vehicle engine used in a small vehicle.

(Prior art) For example, as a starting device for an internal combustion engine,
The one disclosed in No. 30041 and the like is known. In this system, the clutch inner is rotated through a worm gear and a worm wheel by the starter motor, and the clutch is engaged to rotate the crankshaft and start the engine.

On the other hand, as a device in which the engine of a motorcycle is configured as a swing type and the rotation of the starting motor is transmitted to the crankshaft parallel to the axle of the engine, for example, British Patent No. 819690 (September 9, 1959 Class 79) A starter motor as shown in specification 3)) is also known.

(Problem to be solved by the invention) However, in the case of the device of Utility Model Application No. 53-30041 as mentioned above, the centrifugal clutch is engaged to start the engine, so the output shaft must be rotated at the time of starting. As a result, power is wasted and a starter motor with a large capacity is required, which tends to lead to an increase in the size of the starter motor. On the other hand, in a type of vehicle in which a starter motor is installed in the vehicle's engine, and the drive unit that integrates the engine and rear wheels is supported by a swing shaft at the rear of the vehicle, other members within the swing range while driving are It is desirable to make the drive unit as small as possible in order to avoid interference with the motor, etc., and conventional starter motors needed improvement in this respect.

On the other hand, a starter motor 47 (Fig. 9) as shown in British Patent No. 819690 is attached to the side of the engine to transmit rotation to the engine shaft 73, and is offset to one side from the center line in the vehicle width direction. position, and in the longitudinal direction of the engine shaft 7.
3, there was a problem that the balance in the width direction of the vehicle body was poor, and that it protruded to the side of the engine and was likely to interfere with other components of the vehicle body.

(Means for Solving the Problem) In order to solve the problem, the present invention has a drive unit in which the crankshaft and output shaft are placed horizontally with respect to the vehicle body, and the drive unit is pivoted together with the rear wheels on a swing shaft at the rear of the vehicle body. In the engine, the crankcase and transmission case are integrated, and the longitudinal direction of the starter motor attached to this case is aligned with the crankshaft direction, and is located near the center line of the vehicle body in the vehicle width direction, and close to the swing axis. .

(Function) By aligning the longitudinal direction of the starter motor with the crankshaft direction and locating it closer to the center line in the vehicle width direction, the whole can be made more compact, and the engine does not protrude to the side. This makes the car body slim. Also, the balance in the width direction is improved. In addition, by locating the starting motor close to the swinging shaft at the rear of the vehicle body, it is possible to centralize the mass and downsize the shaft support, and the swinging of the starting motor itself is reduced, making it easier for equipment. will be protected.

(Embodiment) Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 show a tricycle as an embodiment of a vehicle to which the present invention is applied, with FIG. 1 showing an external side view and FIG. 2 showing a plan view thereof. Vehicles to which the present invention is applied are not limited to tricycles, but can also be applied to four-wheeled vehicles or two-wheeled vehicles.

The tricycle 1 consists of a front body 2 and a rear body 3. The front body 2 has a low-floor structure similar to that of a scooter, and has a front fender part 4 at the very front, which slopes diagonally rearward and downward from the rear of the fender part 4. It has a front part 5 and a floor part 6 extending flatly to the rear. Floor part 6
A box-shaped raised wall 7 is provided at the rear of the vehicle so as to extend almost completely in the width direction, and prevents the occupant's feet from moving backward and prevents the feet from interfering with the swinging rear vehicle body 3. Functions as a foot guard.

A support post 9 for a front fork 8 is installed on the front part 5 of the front body 2, and the lower part of the front fork 8 stores the single front running wheel 10, and the upper end stores a bar handle 11, a headlight, and meters. A supporting case 12 is provided. A seat post 13 is provided on the central portion of the raised wall portion 7, and a seat 14 for a passenger is placed on the seat post 13.

A joint 15 is provided on the rear lower surface of the front vehicle body 2,
A rear sub-frame 17 of the rear vehicle body 3 is connected to the rear end of the rotational swing support shaft 16, and this frame 17
A rear fork 18 is pivotally attached to the rear fork 18 so as to be swingable about a pin 19 serving as a swing shaft. As is clear from FIG. 3, a unitized drive unit 30 is mounted on the rear part of the rear fork 18 with pins 22,
Mounted via mount rubbers 23 and 24, cushion rubber 25 and rebound stopper rubber 2 are installed before and after pin 19 of rear fork 18.
6 is disposed, and the pin 22 is pivotally connected to the rear end of the rear fork 18 via a pin 27 and a link 28 to improve the followability of the drive unit 30. The drive unit 30 is provided between the two rear drive wheels 20, 20, the drive wheels 20, 20 are connected to both ends of the vehicle, and the unit 30 is housed within the outline of the wheel 20. The drive unit 30 is also provided with a starter motor 53, which will be described later, in close proximity to the pin 19.

In the above, the drive unit 30 is the engine 3
4 is a view taken along line 4-4 in FIG. The cross-section designation line divides the case at the joint surface of the halves 32a and 32b, and a portion of the lower half is shown in cross section.

Inside the front part of the case 32 is a crankshaft 33.
is housed with its journal portion supported by bearings 34, 34, and the crankshaft is connected to a piston (not shown) via a pin 33a and connecting rod 35. At one end of the crankshaft 33 is a drive plate 37 which is the inner part of the centrifugal clutch 36.
A cylindrical body that also serves as a drive gear 39 is loosely connected to the end of this shaft, and a drum-shaped clutch outer 38 is fixed to this.
7a is centrifugally expanded and connected to the shoe 38a of the outer 38, the centrifugal clutch 36 is connected, and the power of the crankshaft 33 is transmitted to the drive gear 39.

Further, the maximum rotation speed of the crankshaft 33 is determined by a drive gear 39 which is operated via the clutch and a driven gear 49 provided on an axle 40 which will be described later.
engagement with the crankshaft 33 and the axle 40
The rotation speed is set below a predetermined number of rotations for engagement.

An axle 40 is horizontally suspended in the front part of the case 32,
The axle 40 has a right drive shaft 41 and an intermediate shaft 4 on the same axis.
2 and a left drive shaft 43, and a right drive shaft 4
1 and the intermediate shaft 42 are spline-engaged and are urged leftward in the figure by springs 44, 44. Opposite ends of the left drive shaft 43 and the intermediate shaft 42 are loosely connected, and a disc-shaped flange portion 45,
A differential friction clutch 48 is provided between the clutch facing 46 and the clutch facing 47 which is interposed in a non-fixed manner and is engaged with one side. Then, the hubs of the left and right drive wheels 20, 20 are connected to the left and right drive shafts 41, 43, and the driven gear 49 provided on one of the drive shafts 41 is meshed with the drive gear 39 described above, so that the axle 40 is driven. , left and right wheels 20,
20 rotation difference is absorbed by the slippage of the clutch 48,
Although not shown in the figure, pads and calipers are provided on both outer sides of the flange portions 45 and 46 to constitute a disc brake device, and the flange portions 45 and 46 constitute a brake disk.

The clutch outer 3 is based on the left end of the crankshaft 33, that is, the power transmission path.
A drum-shaped flywheel 50 as a rotating body that also serves as a mounting base for the magnet of the ACG (generator) is fixedly installed in the upstream side of the flywheel 8, and a cooling fan 51 is attached to the outer surface of the outer wall 50a of the flywheel 50. ing.

A ring gear 52 is fixed to the outer periphery of the base of the peripheral wall of the flywheel 50, and a starter motor 53 is attached to the bulkhead facing the outer edge of the flywheel 50, and the pinion gear portion 53a of the starter motor 53 is inserted into the case 52. The motor section 53b is arranged outside the case 32. As described above, this starting motor 53 is arranged close to the pin 19 in FIG. 3, and is located in a position where there is little vertical movement even if it is in the drive device 30 that swings around the axis of the pin 19 during running. This not only protects the device, but also facilitates wiring to the motor section 53b and the like. This position also has the effect of increasing the dust-proofing effect by being closer to the floor in front.

The starting motor 53 is, for example, as shown in FIG. 5, and has teeth 55a formed on the end of a starting shaft 55 provided in a housing 54, and a gear 56a provided on an output shaft 56 parallel to the teeth 55a to mesh with the teeth 55a. , axis 5
A sliding pinion 57 is fitted onto the pinion 6. Starting shaft 55
The shaft 56 is driven through the teeth 55a and the gear 56a, and the pinion 57 is moved forward from the position where the flywheel 50 is separated from the ring gear 52 at the retreated position below the center line O-O shown on the shaft 56. Then, it reaches the position shown in the diagram above O-O, engages with the ring gear 52, rotates the flywheel 50, drives the crankshaft 33, and starts the engine.Then, the pinion 57 retreats and the ring gear 52 depart from. In this case, since the axle 40 and the crankshaft 33 are connected via the centrifugal clutch 36, the starter motor 53 and the axle 40 are disconnected at the time of starting, so that no undue load is applied to them.

Further, the direction of the starting shaft 55 of the starting electric motor 53 coincides with the axial direction of the crankshaft 33 and the axle 40, and the distance between the two axes is shortened to make it compact.

In the example shown above, the crankshaft and the axle are connected by a gear, but a chain or sprocket mechanism may be used instead, and it goes without saying that it can be used for a four-wheeled vehicle or a two-wheeled vehicle instead of the three-wheeled vehicle shown.

(Effects of the Invention) As described above, the starting device of the present invention allows the longitudinal direction of the starting motor to be aligned with the engine crankshaft direction when the starting motor is installed in the drive unit that is swingable at the rear of the vehicle body. Because it is placed closer to the centerline in the vehicle width direction, the whole body is compact and has good width balance. Furthermore, since the starting device is placed close to the swing shaft, it becomes possible to concentrate the mass, and the vicinity of the shaft support can be simplified and downsized, and the shaking of the starting device is reduced, which is advantageous in terms of equipment protection.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is a side view of the tricycle, Fig. 2 is a plan view thereof, Fig. 3 is a side view of the drive device, and Fig. 4 is Fig. 3 4-4. A line sectional view, FIG. 5 is a diagram showing an example of a starting motor. In the drawing, 19 is a pin, 33 is a crankshaft, 36 is a centrifugal clutch, 50 is a flywheel, 40 is an axle, 39, 49 is a gear mechanism, 20 is a wheel, 52 is a ring gear, 53 is a starter motor, 5
7 is a pinion.

Claims (1)

[Claims for Utility Model Registration] A drive unit 30 integrated with the rear wheels 20 is pivotally supported by a swing shaft 19 at the rear of the vehicle body, and rotation of a starter motor 53 is applied to a crankshaft 33 of an engine 31 of this drive unit 30. In the starting device for a vehicle engine, the crankshaft 33 of the engine is parallel to the axle 40 of the rear wheel and placed horizontally with respect to the vehicle body, and the crankshaft 33 and the axle 40 are arranged in a crankcase for storing the crankshaft 33. The starting motor 53 is attached to the integrated case 32 with a transmission case for storage, and the starting motor 53 has its longitudinal direction aligned with the direction of the crankshaft 33, and with respect to the vehicle width direction. A starting device for a vehicle engine, characterized in that it is disposed near the center line of a vehicle body and close to the swing shaft 19.