JPS6233679Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a starting device for an engine-equipped bicycle capable of engine running, pedal running, and cooperative running of both.

This idea was made with the aim of providing a bicycle with an engine that has a simple mechanism, is low cost, and can be easily operated by anyone.

Hereinafter, this invention will be explained with reference to the drawings which are an example of the implementation. 1 is an engine, 2 is an autoclutch, which is connected to the engine shaft 3 of the engine 1, and this clutch is shown in the sectional view shown in FIG. 4. is a known centrifugal type, and when the engine 1 is stopped, an auxiliary clutch pawl 2a provided on a desk 3a integral with the end of the engine shaft 3 engages with the inner surface of a clutch casing 4a integral with the driven shaft 4 by the action of a spring 2b. When the engine 1 is started by this rotational force, the auxiliary clutch pawl 2a separates from the clutch casing 4a due to centrifugal action, and the driven shaft 4 rotates. Unbind to. Therefore, the engine 1 can idle without transmitting rotation to the driven shaft 4. When the rotation of the engine 1 exceeds a certain level, the desk 3a, which had been separated from the inner surface of the clutch casing 4a by the action of the spring 2c,
The upper main clutch pawl 2d contacts and transmits the rotation of the engine shaft 3 to the driven shaft 4. Next, when the rotation of the engine 1 falls below the limit and becomes idling, the main clutch pawl 2d is inserted into the clutch casing 4a.
, the transmission to the driven shaft 4 is released, and the engine 1
is provided to allow continued idling rotation. When the engine 1 stops, the auxiliary clutch 2a comes into contact with the inner surface of the clutch casing 4a again under the action of the spring 2b, thereby coupling the engine shaft 3 and the driven shaft 4.

The driven shaft 4 is connected to an output shaft 6 via a reduction gear device 5 and a clutch portion 15, and is configured to transmit the output of the engine 1 to rear wheels 9 from a sprocket 7 attached to the output shaft 6 through a chain 8. It's getting old.

The gear device 5 includes an intermediate shaft 12 to which a large bevel gear 11 is attached, which rotates from the driven shaft 4 and meshes with a small bevel gear 10 mounted on the driven shaft 4, and a small gear mounted on the intermediate shaft 12. 13 and a large gear 14 meshing with each other, and a clutch portion 15 is provided between this large gear 14 and the output shaft 6.

The clutch portion 15 connects the axis of the output shaft 6 to the cavity 17.
The expansion spring 16 and the spline shaft 18 are housed inside the output shaft 6, and the spline shaft 18 is slidably protruded from the inner end opening of the output shaft 6 under spring pressure. The clutch groove 2 is provided so that the child 19 corresponds to the side surface of the large gear 14.
0, the output shaft 6 and the large gear 14 are integrally coupled, and rotation is transmitted. Further, an operating shaft 21 is slidably inserted into the axis of the large gear 14, and its outer end is connected to the operating lever 21 on the handle 38.
2, the inner end is connected to the tip surface of the spline shaft 18, and the operating lever 2
2, the operation shaft 21 is slid inward, the spline shaft 18 is recessed into the output shaft 6, and the protrusion 19
and the clutch groove 20, and the large gear 14
The device is capable of releasing the connection between the output shaft 6 and the output shaft 6.

Crankshaft 2 with petals 25 and 26 on both ends
7 is a freewheel 2 installed on the output shaft 6;
Auxiliary crank gear 3 associated with 8 and chain 29
0 on one side, and a starting crank gear 33 associated with a sprocket 31 and chain 32 attached to the extended end of the intermediate shaft 12 on the other side.

The starting crank gear 33 is connected to the crankshaft 27
However, as shown in FIG. 3, like the gear 33a, it is fixed to the crankshaft 27 like the auxiliary crank gear 30, and is attached to the intermediate shaft 12. It is also possible to use a freewheel 31a that rotates freely in the forward direction and engages in the reverse direction.

In addition, the casing 3 of the engine 1 and the gear device 5
The crankshaft 27 is supported by a hanger 37 of the vehicle body 36.

Since the embodiment of this invention is constructed as described above, first, the lever 2 on the handle 38 is
2 to slide the operating shaft 21 inward, slide the spline shaft 18 toward the output shaft 6, remove the protrusion 19 at the tip from the clutch groove 20 of the large gear 14, and remove the clutch part of the gear device 5. Leave 15 free,
Next, apply pedal force to the pedal 25 or 26,
Rotate the crankshaft 27 approximately half a turn in the opposite direction. Therefore, from the first auxiliary crank gear 30 to the chain 2
Since the rotation transmitted to the freewheel 28 by the shaft 9 is reversed with respect to the output shaft 6, the freewheel 28 becomes free and idles. The second starting crank gear 33 meshes with the crankshaft 27 and rotates, transmitting this rotation to the sprocket 31 via the chain 32,
Rotate the intermediate shaft 12. This intermediate shaft 12 rotates in the opposite direction to the output shaft 6 during normal rotation, so the petal 2
The reverse rotations in numbers 5 and 26 have become normal rotations. This normal rotation is accelerated by obtaining an appropriate gear ratio by the large bevel gear 11 and the small bevel gear 10, and is transmitted from the driven shaft 4 to the engine 1 via the autoclutch 2. In auto clutch 2, when rotation stops,
For example, the auxiliary clutch pawl 2a, which is the illustrated stopping coupling mechanism, comes into contact with the clutch casing 4a under spring pressure and transmits the rotation of the driven shaft 4 to the engine shaft 3.
The engine 1 is then started. When the rotation of the engine shaft 3 is increased to idling speed by starting the engine 1, the auxiliary clutch pawl 2a of the autoclutch 2 separates from the clutch casing 4a due to centrifugal force, and the stop coupling mechanism is released. In this idling rotation, the main clutch pawl 2d, which is a rotational coupling mechanism, is connected to the clutch casing 4a.
The rotation coupling mechanism is also released. Therefore, the engine 1 can maintain idling rotation without transmitting the rotation of the engine shaft 3 to the driven shaft 4. When the engine starts and the rotation increases above idling due to the relationship with the accelerator lever (not shown), the main clutch pawl 2d comes into pressure contact with the clutch casing 4a and transmits the rotation. 1
When the rotation of the spline shaft 18 becomes stable and the control lever 22 is returned after returning to idling, the protrusion 19 of the spline shaft 18
and the clutch groove 20 of the large gear 14, and the clutch portion 15 is connected. Then, when the accelerator grip is turned to increase the rotation of the engine 1, the autoclutch 2 is connected to the rotation coupling mechanism by the main clutch pawl 4d, transmits the rotation of the engine 1 to the driven shaft 4, decelerates it by the gear device 5, and outputs it. The power is transmitted from the shaft 6 to the rear wheels 9, and the engine runs. During this traveling, from the intermediate shaft 12 to the chain 32
The starting crank gear 33a is rotated through the crankshaft 27, but rotation is not transmitted to the crankshaft 27 since it is free to rotate forward, and the starting crank gear 33a is fixed to the crankshaft 27 as in the second embodiment. In this structure, the intermediate shaft 12 serves as a freewheel 31a, and rotation is not transmitted from the intermediate shaft 12 to the freewheel 31a.

Next, since the freewheel 28 on the output shaft 6 is free to reverse rotation, rotation is not transmitted to the auxiliary crank gear 30. However, when climbing a boardwalk, the engine speed decreases, so if you step on the pedal in the normal direction at that time, it will mesh with the output shaft 6 and provide power assistance.

Next, when you want to stop the engine and start petering, pull the lever 22 to release the clutch 15 between the output shaft 6 and the reduction gear device 5, and fix the lever 22 in that state. is disconnected and becomes free, and the forward rotation of the pedal is then transmitted to the rear wheel 9 via the auxiliary crank gear 30, freewheel 28, sprocket 7, and chain 8.

From the above, according to this invention, a starting crank gear is provided on the crankshaft, and this is connected by a chain to the intermediate shaft of a reduction gear device that reduces and transmits engine rotation to an output shaft equipped with a remotely controllable clutch part. Therefore, if you operate the clutch to disconnect the output shaft from the engine and use the pedal to reverse the rotation, even though the input to the intermediate shaft is in the reverse direction, the engine will continue to rotate in the forward direction due to the action of the autoclutch's stop coupling mechanism. The engine is driven, and its rotation can be increased appropriately using the gear ratio of the reduction gear device to start the engine.

Therefore, this invented device is simpler than conventional starting devices, contributes to cost reduction by sharing the engine's rotational transmission device and the starting device, and can be used even when the bicycle is stopped. The practical effects of this are extremely large, such as the ability to start the engine and easier starting of this type of bicycle with an auxiliary engine than before.

[Brief explanation of the drawing]

Fig. 1 is a side view of a bicycle with an engine to which this devised device has been implemented, Fig. 2 is a sectional view of the main parts, and Fig. 3 shows another example of the relationship between the starting crank gear and the intermediate shaft of the gear device. The plan view shown in FIG. 4 is a sectional view illustrating the operating principle of the autoclutch. 1...Engine, 2...Auto clutch, 3...
... Engine shaft, 4 ... Driven shaft, 5 ... Reduction gear device, 6 ... Output shaft, 7 ... Sprocket, 8 ...
Chain, 12... Intermediate shaft, 15... Clutch part,
22... Operating lever, 25, 26... Petal, 2
7...Crankshaft, 28...Freewheel, 2
9...Chain, 30...Auxiliary crank gear, 3
1... Sprocket, 32... Chain, 33...
Crank gear for starting.

Claims (1)

[Scope of utility model registration request] An autoclutch that is engaged when the engine is stopped and can transmit rotation from the driven shaft to the engine shaft, and is disengaged when the engine is idling at low speeds and reengaged when the engine is rotating at high speeds above idling. In a bicycle with an engine, the output shaft that engages the drive chain to the rear wheel is provided to receive rotational transmission via the autoclutch and the reduction gear device, and the output shaft is connected to the rear wheel. A clutch part is provided between this output shaft and the reduction gear device to allow free transmission of power to A starting device for a bicycle with an engine, characterized in that the reduction gear device is provided with a sprocket gear that receives the same through a chain, thereby making it possible to start the engine by reversing the pedal.