JPS63116979A - Turning driver - Google Patents

Abstract

PURPOSE:To make ascent running and high speed running both performable in an easy manner, by installing a crankshaft eccentrically, while constituting a booster with the gear mechanism locked to this crankshaft. CONSTITUTION:Turning force securable with a pedal 21 operated is directly transmitted to a main crankshaft 1. And, rotational driving force made by operating pressure against another pedal 22 is added to a bend arm 10 and it acts on the bend arm so as to rotate it with the main crankshaft 1 as an axis. With rotational motion of this bend arm 10, a wheel gear 17 supported on an eccentric crankshaft 15, a small diameter internal gear 13, a small gear 14, a driving gear 5 and sub-driving gear 8 are all rotated at the inside of a large diameter internal gear 19 centering on the main crankshaft 1 each. In consequence, the small gear 14 to be engaged with the small diameter internal gear 13 is speeded up in rotation, and the turning force is transmitted to a chain wheel 2 via gear 5, 8, 4 and 7, thus it is transmitted to a rear wheel.

Description

Detailed Description of the Invention A1 Object of the Invention [Field of Industrial Application] The present invention is a rotary drive device that powers up the rotational energy of a rotary drive unit, accelerates it, and extracts it from the output side, For example, the present invention relates to a device that can be widely applied as a rotating mechanism of a bicycle, a bicycle, a bicycle, a car, etc., 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. In this type of 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 amount of force must be applied to the pedals, which is a burden when riding on the pitch.

[Problem that the invention seeks to solve]

The inventor has already proposed a device to solve this problem (Japanese Patent Application No. 61-197938), but the device involved has a large number of parts (and the frictional resistance between gears is large). There was a lot of energy loss, and it was not always satisfactory.

Therefore, the present invention is a rotary drive device that enables smooth running without requiring much force even when overloaded as described above, and which can be applied to all kinds of rotary mechanisms, and in particular: The purpose of this invention is to provide an efficient device with less energy loss in the main part of the device.

Configuration of the Invention [Means for Solving Problems] The present invention provides a large-diameter internal gear fixed to a vehicle body, a main crankshaft pushed through the large-diameter internal gear, and a main crankshaft. A wheel gear supported by an eccentric crankshaft eccentric to the shaft and meshing with the large-diameter internal gear, a small-diameter internal gear fixed to the wheel gear, and one end coupled to the main crankshaft. a refracting arm, a small gear that is pivotally supported at the other end of the refracting arm and meshes with the small diameter internal gear, a drive gear integrated with the small gear across the refracting arm, and a drive gear that is driven by the drive gear. The above problem was solved by configuring the device with a driven gear integrated with the main crankshaft and a chain wheel also integrated with the main crankshaft.

[For production]

When a rotational force is applied to the main crankshaft, the main crankshaft will move at that position, and the eccentric crankshaft will move through the bending arm.
Rotates around the main crankshaft. As the eccentric crankshaft rotates around the main crankshaft, the wheel gear supported by the eccentric crankshaft and the small-diameter internal gear fixed to the wheel gear rotate against the large-diameter internal gear fixed to the vehicle body. It revolves around its axis on the inside. As it rotates, the small gear that internally meshes with the small-diameter internal gear and the drive gear integrated with it rotate at high speed depending on the gear ratio, causing the chainwheel to rotate at high speed via the driven gear that meshes with the drive gear.

〔Example〕

An embodiment in which the present invention is applied to a bicycle drive unit will be explained with reference to the drawings. In the figure, 1 is a main crankshaft, and at one end (the left end in Fig. 2), a crank arm and a pedal are connected in a conventional manner. can be installed. A chain wheel 2 is fixed to the main crankshaft 1 via a bearing 3. A chain is wound around this chain wheel 2, and the main crankshaft 1
The rotational driving force is transmitted to the rear wheels. The chain wheel 2 referred to here includes gears. Reference numeral 4 denotes a driven gear fixed to the main crankshaft 1, with which the driving gear 5 meshes. The driven gear 4 and the driving gear 5 have a special shape as shown in FIG. That is, the tooth profiles and tooth grooves of these gears are circular. The fillet portion 6 of the gear on one side (the drive gear 5 side in FIG. 1), that is, the portion where the tooth profile curve connects to the tooth bottom, is slightly constricted inward.

The reason why the driven gear 4 and the driving gear 5 are made into such a deformed shape is to reduce the resistance when the two are engaged, so that power transmission can be performed smoothly without loss. Preferably, a sub-drive gear 7 is coaxially fixed to the driven gear 4, and a sub-drive gear 8 that meshes with the sub-drive gear 7 is also coaxially fixed to the drive gear 5. The reason for arranging each gear in two stages in this way is to prevent the driven gear 4 and the driving gear 5 from rattling due to play when they are engaged, and is not necessarily an essential requirement. A recess 9 is formed in the side surface of the sub-drive gear 7, into which one end of the bending arm 10 is loosely fitted. That is, the bending arm 10 has a step at both ends thereof, and enters into the concave portion 9 by the step. A shaft hole 1) is formed in the loosely fitting portion of the recessed portion 9 of the bending arm 10, and the tip of the main crankshaft 1 passes through the bearing 3, driven gear 4, and sub-drive gear 7 into this shaft hole. 1) The shaft hole 1) and the tip of the main crankshaft 1 facing inward are squared or processed with two chamfers, etc., so that the main crankshaft 1 and the bending arm 10 are
so that they rotate together. The refracting arm 10 rotates around the main crankshaft 1, as will be described later. The gear shafts 12 of the drive gear 5 and the sub-drive gear 8 are inserted through the other end of the bending arm 10 . The tip of the gear shaft 12 is exposed to the outside of the bending arm 10, and a small gear 14 meshing with a small diameter internal gear 13 is fixed there. Small diameter internal gear 1
3 is indirectly supported by an eccentric crankshaft 15 installed at the bending part of the bending arm 10. That is, a planar donut-shaped top plate 16 is fixed to the outside of the small-diameter internal gear 13, and a wheel gear 17 is further fixed to the outside of the top plate 16, so that these two parts are integrated.

A bearing 18 is installed in the center of the wheel gear 17, and the eccentric crankshaft 15 is supported by the bearing 18. The wheel gear 17 meshes with a large-diameter internal gear 19 fixed to the vehicle body. The large-diameter internal gear 19 has a shape similar to a cylindrical container with a shallow bottom, and the internal gear is installed on the top surface thereof, and the bottom surface 20 thereof is located inside the chain wheel 2 and the bearing 3, The main crankshaft 1 is loosely fitted. Preferably, as shown in FIG. 3, the number of teeth of the wheel gear 17 is half of the normal number and the pitch between the teeth is doubled. Alternatively, the wheel gear 17 may have the normal number of teeth, and the large diameter internal gear 19 may have the number of teeth reduced by half. By doing so, the frictional resistance during kamiai is reduced, thereby realizing smooth driving force transmission.

Furthermore, it is preferable to reduce the number of teeth of either one of the small diameter internal gear 13 and the small gear 14 by half.

In FIG. 4, 21 is a pedal attached to the main crankshaft 1, 22 is a pedal attached to the eccentric crankshaft 15, and the crank of the pedal 22 is more eccentric than the crank of the second pedal, that is, The distance between the main crankshaft 1 and the eccentric crankshaft 15 in FIG. 1 is shortened.

In the above configuration, the rotational driving force due to the pressure applied to the pedal 21 is directly transmitted to the main crankshaft 1, and
The rotational driving force due to the pedal pressure applied to 2 is applied to the bending arm 10, and the bending arm 10 acts to rotate about the main crankshaft 1.

This rotational movement of the bending arm 10 causes the wheel gear 17 supported on the eccentric crankshaft 15 and the small-diameter internal gear 13 to
, the small gear 14, the driving gear 5, and the sub-driving gear 8 are each rotated (revolution) inside the large-diameter internal gear 19 around the main crankshaft 1. At this time, the wheel gear 17 is rotated inside the large-diameter internal gear 19. Since it meshes with the gear, it will rotate along with the above revolution. As the wheel gear 17 rotates, the small-diameter internal gear 13 integrated therewith also rotates. As a result, the small gear 14 meshing with the small diameter internal gear 13 rotates at high speed due to their gear ratio. The rotational force is directly transmitted to the coaxial drive gear 5 and sub-drive gear 8, and further transmitted to the driven gear 4 and sub-drive gear 7 that mesh with the drive gear 5 and sub-drive gear 8. The rotation of the driven gear 4 and the auxiliary drive gear 7 is directly transmitted to the main crankshaft 1, that is, the chain wheel 2, and from there to the rear wheels via appropriate transmission means. Therefore, eccentric crankshaft 1
The pedal pressure applied to 5 not only directly rotates the main crankshaft 1 via the bending arm 10, but also rotates the wheel gear 17,
Via the small-diameter internal gear 13, the small-diameter gear 14, the drive gear 5 (auxiliary drive gear 8), and the driven gear 4 (auxiliary drive gear 7),
The main crankshaft 1 is rotated using the drive gear whose speed has been doubled and the speed has been increased.

Effects of the Invention The present invention is as described above, and by making one crankshaft eccentric, the rotational force and rotational speed are doubled through a plurality of gears fixed to the crankshaft. Therefore, it has the effect of making it possible to run uphill and run at high speed with a small amount of force, and is very useful as it can be applied to various rotating mechanisms.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present device, FIG. 2 is a longitudinal sectional view thereof, FIG. 3 is a rear view thereof, and FIG. 4 is a diagram showing the state in which the device is mounted on a bicycle. Explanation of symbols 1- Main crankshaft, 2...Chain wheel, 4
- Driven gear, 5- Drive gear, 10- Bent arm, 13- Small diameter internal gear, 14...- Small gear, 15-
Eccentric crankshaft, 17--Wheel gear, 19--
Large diameter internal gear Fig. 1 Fig. 2 Fig. 3

Claims (6)

[Claims] (1) A large-diameter internal gear fixed to the vehicle body, a main crankshaft inserted through the large-diameter internal gear, and a main crankshaft that is eccentric to the main crankshaft. a wheel gear meshing with a large-diameter internal gear; a small-diameter internal gear fixed to the wheel gear; a refracting arm having one end coupled to the main crankshaft;
a small gear that meshes with the small diameter internal gear, a drive gear that is integrated with the small gear across the bending arm, and a driven gear that is integrated with the main crankshaft that is driven by the drive gear; A rotary drive device also comprising a chain wheel integrated with the main crankshaft. (2) The rotary drive device according to claim 1, wherein the driving gear and the driven gear are arranged in two stages. (3) The rotary drive device according to claim 1, wherein the tooth profiles and tooth grooves of the driving gear and the driven gear are circular. (4) The rotary drive device according to claim 1, wherein the fillet portion of the drive gear or the driven gear is constricted inward. (5) The rotary drive device according to claim 1, wherein the number of teeth of the large-diameter internal gear or wheel gear is halved. (6) The rotary drive device according to claim 1, wherein the number of teeth of the small diameter internal gear or small gear is halved.