JPH01197192A - Rotation driving device - Google Patents

Abstract

PURPOSE:To enable comfortable running by arranging the constitution such that inner gear is rotated with the eccentric rotation of wheel gear by a crank arm, the rotation is transmitted to an outer gear inside, and it is transmitted to a chain wheel gear through gradual acceleration by means of another gear. CONSTITUTION:A small disc 4 is fixed to a crank arm 2 fixed to an end of a crank shaft 1, and an eccentric plate 5 is fixed inside this small disc 4. A wheel gear 7 is maintained by fixing an eccentric bush 6 to this eccentric bush 6, and the gear is meshed with an inner gear 9 arranged at a cover 8. A support ring 11 is fixed to the inside of the gear 7, and a first inner gear 13 of large diameter is fixed to the inside through a spacer 12. The aforesaid constitution is provided in the form of two steps where the diameters are gradually made smaller toward the inside. One of gear 25 of overlapping gears 24 rotating concentrically with the crank shaft 1 is meshed with a third inner gear 23, while the other gear 26 is meshed with a chain wheel gear 27 axially supported on an arm 8a of the cover.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention is a rotary drive device that increases the rotational force of a rotary drive unit, accelerates it, and extracts it from the output side. The present invention relates to a device that can be widely applied as a rotating mechanism such as an automobile, a generator, or any other rotating mechanism.

[Conventional technology]

Taking a bicycle as an example, its drive unit consists of a chainwheel, cranks attached to the left and right sides of the chainwheel, and pedals fixed to the crank.When you step on the pedal, the chainwheel rotates, and the rotation is transferred to the chain. is transmitted to the rear wheels via.

[Problem to be solved by the invention]

In the case of such a drive mechanism, the rotation of the crank is transmitted directly to the chainwheel, so in order to give a large rotational force to the chainwheel, a large force must be applied to the pedals, which is a burden when driving uphill etc. becomes.

Therefore, the present invention is a rotary drive device that enables smooth running without requiring much force even when overloaded as described above, and can be applied to all kinds of other rotary mechanisms. The object is to provide an efficient device with low internal frictional resistance and low energy loss.

[Means to solve the problem]

According to the present invention, a wheel gear that meshes with an internal gear provided on a cover fixed to a vehicle body frame, etc. is installed eccentrically with respect to the main shaft, and an external gear that meshes with the internal gear that is concentrically integrated with the wheel gear is installed eccentrically with respect to the main shaft. installed eccentrically with respect to the main axis,
A concentrically integrated internal gear is attached to this external gear,
Furthermore, if necessary, a configuration consisting of an external gear and an internal gear with a smaller diameter is installed, and a superposition gear consisting of an external gear that meshes with the final stage internal gear and an external gear that meshes with the chain wheel gear is attached to the main shaft. This is a rotary drive device in which the chain wheel gear is installed concentrically with the cover, a chain wheel is integrated with the chain wheel gear, and the chain wheel is pivotally attached to the cover.

[For production]

The wheel gear rotates (revolutions) eccentrically from the main shaft due to input such as pedal pressure. Since the wheel gear meshes with the internal gear of the cover, it rotates as it revolves, and its rotation is transmitted to the internal external gear, which is then gradually accelerated and transmitted to the chain. Output from wheel gear. Each gear, except for the overlapping gear, is held by the main shaft so as to rotate eccentrically with respect to the main shaft, and the rotational force between the gears is smoothly transmitted.

〔Example〕

An embodiment in which the device according to the present invention is applied to the drive unit of a bicycle will be described with reference to the drawings.
can be installed.

In other rotary drive devices, input gears, pulleys, etc. are attached instead of the crank arm 2. Reference numeral 4 designates a small disk fixed to the crank arm 2, into which the crankshaft 1 is inserted and rotates around the crankshaft 1. Reference numeral 5 denotes an eccentric plate fixed to the inside of the small circular plate 4, which is eccentric with respect to the crankshaft 1. An eccentric bushing 6 is fixed inside the eccentric plate 5, and a crankshaft l is eccentrically inserted through the eccentric bushing 6. A wheel gear 7 is held by the eccentric bush 6 via a bearing, and internally meshes with an internal gear 9 provided on the cover 8. The cover 8 covers the entire mechanism and is fixed to the vehicle body frame 10. A support ring 11 is fixed inside the wheel gear 7,
Furthermore, a large-diameter first internal gear 13 is fixed inside the support ring 11 with a spacer 12 interposed therebetween. Therefore, the wheel gear 7, the support ring 11, and the first inner float 13 are integrated,
The cover 8 rotates along the internal gear 9 in an eccentric state with respect to the crankshaft 1. A configuration similar to this is
There are two more steps inside, each with a smaller diameter.

That is, 14 is an eccentric plate, 15 is an eccentric bushing fixed to the eccentric plate 14, and an external gear 16 is internally meshed with the first inner float 13.
is held through a bearing. A buried plate 17 is integrally attached to the external gear 16, and a spacer 18 is attached to the buried plate 17.
A medium-diameter second inner float 19 is attached via the middle diameter inner float 19. Moreover, 2o is an external gear held by the eccentric bushing 2o, and internally meshes with the second inner float 19. A buried plate 22 is integrally attached to the external gear 21, and a small-diameter third inner float 23 is attached to the buried plate 22 via a spacer. 24 is a superimposed gear that rotates concentrically with the crankshaft l, one gear 25 internally meshes with the third internal gear 23, and the other gear 26
meshes with a chain wheel gear 27 pivotally supported by the arm 8a of the cover 8. A chain wheel 28 is integrally attached to the chain wheel gear 27,
A chain is wrapped around this, and rotational driving force is transmitted to the rear wheels.

In the above configuration, the pedal force applied to the pedal 3 is transmitted from the crank arm 2 to the small disk 4 and the eccentric plate 5 as rotational driving force. Along with this, the eccentric plate 5 and the wheel gear 7
revolves around the crankshaft 1 at a position eccentric from the crankshaft 1 by a certain distance. Since the wheel gear 7 meshes with the internal gear 9 of the cover 8 which is fixed and does not rotate, it rotates in the direction opposite to the direction of rotation of the crank arm 2, in other words, the direction opposite to the direction of its revolution. This wheel gear 7 rotates together with the support ring 11 and the first inner float 13, and the first inner float 13 rotates the external gear 16 internally meshed therewith in the same direction as its rotation direction. As the external gear 16 rotates, it revolves along the first inner float 13 in a direction opposite to its rotation direction. The top plate 17 and the second internal gear 19, which are integral with the external gear 16, rotate and revolve together with the external gear 16, and the second internal gear 19 rotates the external gear 21, which is internally meshed therewith, in the direction of rotation. Rotate in the same direction. As the external gear 21 rotates, it revolves along the second internal gear 19 in a direction opposite to its rotation direction.

The top plate 22 and the third inner float 23, which are integrated with the external gear 21, rotate and revolve together with the external gear 21, and the third inner float 23 connects to the overlapping gear 24 via the gear 25 that is internally meshed therewith. Rotate the whole thing. The pedal force applied to the pedal 3 is thus gradually accelerated without difficulty through the combination of multiple gears, and is smoothly transmitted to the overlapping gear 24 that rotates around the crankshaft 1. The accelerated rotation of the polymerization gear 24 is transferred from the gear 26 to the chain wheel gear 27.
and is transmitted to the chain wheel integrated therein,
The rear wheel is rotationally driven via a chain wound around a chain wheel 28. That is, with a small rotational driving force applied to the pedal 3, a large rotational driving force can be obtained.

〔Effect of the invention〕

The present invention is as described above, and has the effect of providing a rotary drive device in which the input rotary drive force is smoothly transmitted, gradually accelerated during that time, and can output easily even in the event of an overload.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of the present invention, Fig. 2 is a view showing the inside thereof, Fig. 3 is a sectional view taken along the line A-A in Fig. 1, and Fig. 4
The figure shows the cover. 1 - Crankshaft 5.14 - Eccentric plate 7 - Wheel gear 8 - Cover 9.13.19.23 - Internal gear 15.2 - Eccentric bush 16.21 - External gear 24 - Overlapping gear 27 − chain wheel gear;

Claims (1)

[Claims] A wheel gear that meshes with an internal gear provided on a cover fixed to the vehicle body frame etc. is installed eccentrically with respect to the main shaft, and an external gear that meshes with the internal gear that is concentrically integrated with the wheel gear is installed eccentrically with respect to the main shaft. The external gear is installed eccentrically, and an internal gear integrated concentrically is attached to this external gear, and if necessary, a smaller diameter configuration consisting of this external gear and internal gear is installed, and the final stage internal gear A superposition gear consisting of an external gear that meshes with the chain wheel gear and an external gear that meshes with the chain wheel gear is installed concentrically on the main shaft, and a chain wheel is integrated with the chain wheel gear and is pivotally attached to the cover. Rotary drive device.