JPS598032Y2 - transmission - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mechanical transmission device for bicycles, motorcycles, automobiles, machine tools, agricultural machinery, and other various machines.

Conventionally, gear type transmissions have been most widely used as mechanical transmissions, and belt type and friction type transmissions have also been used.

However, these conventional ones cause wear, breakage, and scratches on the teeth.
They always contained various problems such as slippage, power transmission strength, speed ratio accuracy, and the effects of temperature and humidity.

The present invention was developed in view of these circumstances, and by combining a slider and a chain transmission device, there is no wear, breakage, scratches, etc., no slippage, and powerful transmission is possible. Our goal is to propose a mechanical transmission that has accurate ratios and is unaffected by temperature and humidity.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings in accordance with one embodiment thereof.

FIG. 1 is a plan sectional view showing the main part of this embodiment, and FIG. 2 is a sectional view taken along the line II--II in FIG. 1.

First, I will explain the precepts.

1 is a driving shaft, and a plurality of chain sprockets Al to A5 having different diameters are fixed to this driving shaft 1.

The driving shaft 1 is rotated in both forward and reverse directions by a motor (not shown) or the like.

? is a driven shaft that is provided parallel to the driving shaft 1 and is a driven shaft.

A plurality of chain gears B1'' and B5 are attached to this driven shaft 2 so that each chain gear can rotate freely in forward and reverse directions.
1 to B5 are arranged to have positions and diameters corresponding to those of the chain gears A1 to A5 of the driving shaft 1, respectively.

And between each of these corresponding chain gears (A. and B.
1, A2 and B2, and B3, A4 and B4, A5 and B5)
Chains C1 to C5 are spanned over each.

Reference numeral 3 denotes a keyway shaped in the axial direction of the driven shaft 2.

Reference numeral 4 designates an appropriate number of key grooves formed in each of the chain gears B1 to B5 of the driven shaft 2 so as to correspond to the key grooves 3, respectively.

Reference numeral 5 denotes a slider, one end of which has a truncated conical transmission protrusion 5, and the other end has a hole in the center thereof at right angles to the axial direction of the driven shaft 2. 5 is provided in the hole 5, and a spring 5 which is in a resilient state between it and the key groove 3 is provided in the hole 5.
3 is installed.

Furthermore, a through hole 54 is bored in the center of the slider 5 in the axial direction of the driven shaft 2, and the wire 6 is inserted through the through hole 54.

The slider 5 and the wire 6 are connected to each other via connecting portions 6, 6 so as to be freely rotatable.

In this embodiment, a supporting ring 6 fixed to a wire 6 and a rotatable idle ring 6 are used as the connecting parts 6, 6.

Therefore, when the wire 6 is moved back and forth in the axial direction of the driven shaft 2 using a handle (not shown) or the like, the slider 5 also slides back and forth in the axial direction within the keyway 3. , even if the slider 5 rotates, the wire 6 does not rotate.

The slider 5 having such a structure is slidably fitted into the key groove 3 of the driven shaft 2, and is fitted in the key groove 4 formed in each of the chain gears B1 to B5. Due to sliding and the elasticity of the spring 53 described above, the transmission protrusion 5 is selectively fitted into one of the two, thereby creating a key connection.

Note that the keyway 3 of the driven shaft 2 is also provided with a hole 3 for fitting the spring 53 into the chain gears B1 to B as shown in the figure.
Since the required number of sliders 5 are provided at positions facing each keyway 4 of 5 and other appropriate positions, the above-described sliding and fitting operations of the slider 5 can be performed more accurately.

Also, is it fitted into a keyway 3 formed on the driven shaft 2? In order to prevent the slider 5 from falling off, the keyway 3 is provided with a lid (not shown) having an outer surface of the same shape as the outer surface of the driven shaft 2. After fitting into the lid, the lid is fixed to the driven shaft 2 using a bolt or the like.

The above is an explanation of the structure of the present invention.

Next, the effect will be explained.

When the driving shaft 1 is rotated in a fixed direction by an electric motor or the like, the chain gears A1 to A5 of the driving shaft 1 are also rotated in a fixed direction accordingly.

The rotation of each of the chain gears A1 to A5 is transmitted to the chain gears B1 to B5 of the driven shaft 2 via the respective chains C1 to C5, and the chain gears B1 to B5 rotate at different rotational speeds of the driven shaft. Driving around 2.

Therefore, the rotation speed of the driven shaft 2 is selected by operating the slider 5 as described below.

First, when the wire 6 is moved in the axial direction of the driven shaft 2 using a handle or the like, the slider 5 moves into the keyway 3.
The transmission protrusion 5 can be selectively moved to any one of the key grooves 4 formed in the chain gears B1 to B5 by sliding and the elasticity of the spring 53. It fits in and creates a chain connection.

As a result, the slider 5 is engaged in the axial direction, and a predetermined chain gear (B in the drawing) is engaged in the rotational direction.
．． ), the slider 5, and the driven shaft 2 are restrained and rotate together.

That is, the desired one of the driven shaft 2 and the large number of chain gears B1 to B5
The two are selectively axially connected, and rotation is transmitted between them.

The other chain gears B1 to B5 that do not transmit rotation are idling around the driven shaft 2.

By operating the slider 5 in this manner, the desired required rotation speed of the driven shaft 2 can be obtained.

Now, in the transmission device according to the present invention,
Chains C1 to C5 are used to transmit rotation, and driven shaft 2
By providing the main parts of the transmission such as the slider 5 on the side,
It has a long lifespan, no slippage, strong transmission, reliable rotation speed selection, accurate speed ratio, and is unaffected by temperature and humidity.

Moreover, since the spring 53 which is in a resilient state between the hole 5 of the slider 5 and the key groove 3 is installed, the spring 53, which is most likely to wear out during gear shifting, is protected and has excellent strength. This means that

Furthermore, during gear shifting operations, even if the slider 5 rotates, the wire 6 does not rotate, so there is no need to worry about eccentricity caused by rotation of the wire 6, and gear shifting operations can always be performed accurately. become.

Further, the slider 5 is positioned by fitting the spring 53 into the hole 3 provided in the keyway 3 of the driven shaft 2, so that the slider 5 can perform the above-described sliding and fitting operations. is carried out more accurately, resulting in the aforementioned long life, no slippage, strong transmission, reliable rotation speed selection, accurate speed ratio, and is not affected by temperature or humidity. These points will be further improved.

The transmission according to the present invention is constructed and operates as described above.

Therefore, a chain is used to transmit the rotation, and the predetermined slider is used to select the rotation speed, and the slider is arranged in a predetermined relationship with the wire and the hole provided in the keyway of the driven wheel. What is the lifespan? It overcomes all the problems that conventional mechanical transmissions had, such as being flexible, free of slippage, strong transmission, reliable speed selection, accurate speed ratio, and unaffected by temperature and humidity. Since the problems are solved all at once, the transmission device according to the present invention has great effects.

[Brief explanation of drawings]

The drawings show one embodiment of the transmission device according to the present invention, and the first embodiment shows the transmission device according to the present invention.
The figure is a plan sectional view showing the main part of the embodiment, and Figure 2 is the first
FIG. 2 is a sectional view taken along the line II-II in the figure. 1... Driving axis, 2... Driven axis, 3...
...Key groove, 3 ... Hole, 4 ... Keyway, 5 ... Slider, 5 ... Speed change protrusion, 5. ... hole, 53 ... spring,
54...Through hole, 6...Wire, 6,
... Clamping ring, 6... Idle ring,
A1-A5... Chain gear, B1-B5...
・Chain gear, C1-C5...Chain.

Claims (1)

[Claims for Utility Model Registration] A driving shaft 1, a plurality of chain gears A1 to A5 with different diameters fixed to the driving shaft 1, a driven shaft 2 provided parallel to the driving shaft 1, and a driven shaft 2 provided in parallel to the driving shaft 1; A plurality of chain gears B0 to B5, each of which is rotatably assembled to the driven shaft 2 and has a position and diameter corresponding to each of the chain gears A1 to A5 of the driving shaft 1, and the driving shaft 1 and the driven shaft. It consists of chains C1 to C5, which are respectively stretched between chain gears A1 to As and B1 to B5 corresponding to the driven shaft 2, and a keyway 3 is formed in the axial direction of the driven shaft 2, and this keyway 3, each of the chain gears B1 to B5 of the driven shaft 2 is also formed with a keyway 4, and is slidably fitted in the keyway 3 of the driven shaft 2, and the sliding and key Due to the elasticity of the spring 53 that is resiliently attached between the groove 3 and the groove 3, which one of the chain gears B1 to B5 of the driven shaft 2? The slider 5 is provided with a slider 5 that selectively fits into the keyway 4 to form a key connection, and the spring 53 is attached to the hole 5 provided at the end of the slider 5. At the same time, a through hole 54 is bored in the center of the driven shaft 2 in the axial direction.
A wire 6 is inserted into the driven shaft 2, and the slider 5 and the wire 6 are connected to each other through connecting portions 61 and 6 so as to freely rotate. Each chain gear B1 has a hole 3 into which the spring 53 is fitted.
- A transmission characterized by being provided at a position facing the keyway 4 of B5.