KR20100108175A - Power transmission apparatus - Google Patents

Abstract

PURPOSE: A power transfer device is provided to prevent the theft or the neglect accident since one locker can be moved to a locking position wherever a protrusion of a rotary shaft is located. CONSTITUTION: A power transfer device comprises a first operation unit(10) and a second operation unit(20). The first operation unit comprises a first rotator installed on a first rotary shaft(11). The second operation unit is installed on one or both ends on a second rotary shaft(21). The second operation unit forms a cross axis gear along with the first rotator of the first operation unit. A plurality of roller gears(13) are arranged on the circumference of the first rotator of the first operation unit. A plurality of corresponding roller gears(23) are arranged on the circumference of the second rotator of the second operation unit. Two roller gears engage with each other.

Description

Power Transmission Unit {POWER TRANSMISSION APPARATUS}

According to the present invention, the power transmission device implements a chainless power transmission, in particular, a power transmission for a bicycle, in which the first operating portion and the third operating portion arranged before and after the second operating portion are respectively the second operating portion. By forming a cross-axis gear and the mutual engagement is made by the roller gear,

The present invention relates to a power transmission device capable of maximizing power transmission efficiency by roller gears having low friction loss when power is transmitted from the first operating part to the second operating part and from the second operating part to the third operating part.

In implementing a power transmission in the conventional bicycle is composed of a drive gear connected to the pedal, a driven gear connected to the rear wheel, and a chain for transmitting the power of the drive gear to the driven gear,

At this time, the chain is separated from the gears due to the sag (extension) due to frequent use, as well as this may cause a safety accident.

Efforts to implement the chainless bicycle proposed to solve this problem have been made after the publication of Patent Publication No. 1995-0029129 (1995.11.22) `` Bevel Gear Driven Schafood Power Transmission Bicycle, ''

Patent Registration No. 0217891 (1999.06.07) `` Automatic Gearless Bicycle ''

Patent Registration No. 0414889 (2003.12.29) 『Gainless power transmission gear member』,

Patent Registration No. 0491743 (2005.05.18) 『Power transmission device of bicycle』,

Patent registration No. 0527093 (2005.11.01), `` curve value forming device of sprocket gear for power transmission device of chainless bicycle ''.

The development direction of the power transmission device for the conventional artless bicycle is how reliable the power transmitted through the crank connected to the pedal is transmitted to the rear wheel.

How to guarantee the low manufacturing cost corresponding to the chain-type power train,

And it was how to implement the transmission gears commercialized in the chain-type power train.

The patent registration No. 0414889 proposes a power transmission member consisting of a crown gear mounted on the crankshaft side with a pedal and a roller gear to transfer the power of the crankshaft to the rear wheel side.

In the commercialized products, due to the large contact area between the crown gear and the roller gear, there were problems of increased friction, unnecessary power consumption, and loud noise.

In addition, the manufacture of the crown gear has to use a cutting process method, there is a problem in that the cost burden for cutting while ensuring the strength and wear resistance of the gear.

There is a patent registration No. 0581839 (2006.05.13) [power transmission device] to solve this problem,

In this patent, the spur gear and the chain gear are grafted and deformed to form a tooth such that the groove is an acute angle with an imaginary plane formed by the disk, and has a plurality of rotational values of a roller type engaged with the groove. By constructing the intermediary member, we tried to ensure the operation reliability of the gear and the intermediary member that make up the cross-axis gear while reducing the gear manufacturing cost.

In addition, Patent Registration No. 0842361 (2008.06.24) [Power transmission device] intersects with an intermediate member having roller-type rotating teeth radially arranged so as to engage with the groove of the sprocket and form a right angle with respect to the rotation axis. It is proposed a technology that can ensure rolling reliability by reducing the friction coefficient by configuring the shaft gear to prevent the loss of power, while ensuring the operation reliability and easy manufacturing.

Nevertheless, the power transmission proposed for chainless bicycles to date

Sprocket-type gears on the crankshaft or rear wheel hub

It consists of roller gears provided at both ends of the power relay member for transmitting the power of the crankshaft to the rear wheel hub.

If the teeth of the sprocket come into close contact with the rollers, they will pinch and will not work.

It is installed at a certain interval to transmit power.

In this case, not only the problem of vibration and noise

Because it is impossible to always contact,

The power loss problem was also significant due to sliding friction (a type of slip phenomenon).

In addition, in connection with the task of providing an inexpensive manufacturing cost corresponding to a chain-type power train.

In the case of sprockets (usually provided in the crankshaft or rear wheel hub) that come into contact with the roller gears that make up the power train proposed for conventional chainless bicycles.

Depending on the application, various contact angles are required, and the distance from rear crankshaft to crankshaft equipped with pedals is standardized in bicycles produced in the present.However, depending on the manufacturer, the distance varies from a few millimeters to several centimeters. for,

Rather than producing a separate bicycle frame for the power transmission system for realizing a chainless bicycle, the product is developed and produced and sold to install the chainless power transmission device on an existing chain-driven bicycle to produce a post-chainless power transmission device that can be competitive. From the point of view of the seller, it is inappropriate to produce separate chainless power trains according to the deviation of the frame dimensions of the existing bicycle manufacturers.

It is a task of desperate to develop a single chainless power train that can cover all the frame dimensional deviations ranging from several mm to several cm and can cope with various contact angle changes of the crank and the pivot shaft.

As such, the operating environment that must cover all the frame dimensional deviations ranging from several mm to several cm)

In order to be able to interlock at various angles according to

If not, the contact surface will not be formed accurately. Therefore, non-contact or interference will occur and power transmission or rolling contact will not be smooth.

The introduction of complex shapes has been recognized as inevitable,

Precision machining of such complex shapes will inevitably lead to an increase in manufacturing cost.

This cost escalation problem is still the most serious and top priority, given the situation of latecomer chainless bicycle manufacturers who must guarantee the same, similar or possibly lower supply prices to the overwhelming market-driven chaingear. to be.

On the other hand, in the past, it was common to install various types of locks on wheels (rims or spokes) of bicycles and motorcycles, and to open and lock them using manual or automatic (electronic) keys.

However, conventional locking devices have not been proposed to lock the rotation of the rotating shaft in consideration of the power transmission characteristics of the chainless bicycle.

In the present invention, the first operating portion and the third operating portion arranged before and after the second operating portion respectively constitute a cross-axis gear with the second operating portion, the interlocking is configured by the roller gear, the first operating portion An object of the present invention is to provide a power transmission device capable of maximizing power transmission efficiency by roller gears having low frictional loss when power is transmitted from the second operating portion and the second operating portion to the third operating portion.

In addition, the present invention provides a power transmission of which the former roller has a lower height than the latter roller for smooth contact and easy mounting of the roller provided in the first operating part or the third operating part and the roller provided in the second operating part. It is an object to provide a device.

Furthermore, the present invention provides a manual or automatic (wireless signal) by installing a locking device on the rotating shaft corresponding to the relay member interposed in the middle in the process of transmitting the pedal effort of the pedal to the rear wheel in the chainless bicycle, for example. Locking or unlocking, and the locking means is in the locked position by, for example, a spring force in the absence of an electrical signal, and is magnetized by the solenoid coil when the electrical signal is input to operate the locker Can be moved to a position that does not interfere with the locking projection of the rotating shaft to be in the unlocked state. Furthermore, when there is one locker and the locking projection of the rotating shaft descends to come into contact with the locker, a situation in which the locking function cannot be performed is prevented. For this reason, the lockers of the locking means are spaced apart from each other by two, so that no matter what position One of the lockers where you can be sure to move the lock position it aims to provide a power transmission device that can contribute to the anti-theft protection and safety.

In order to solve the above problems the power transmission device according to the present invention

A first operating part including a first rotating shaft and a first rotating body provided on the first rotating shaft;

A second operating part including a second rotating shaft, a second rotating body provided at one end or both ends on the second rotating shaft and forming a cross shaft gear with the first rotating body of the first operating part;

, ≪ / RTI >

It has a plurality of roller gears arranged around the first rotating body of the first operating portion,

Having a plurality of corresponding roller gears arranged around the second rotating body of the second operating part

The two roller gears are engaged with each other.

In addition, the power transmission device according to the present invention

And a third operating part including a third rotating shaft, a third rotating body provided on the third rotating shaft, and a plurality of roller gears arranged around the third rotating body, wherein the second fitting part has both ends of the second rotating shaft. It is preferable to have two second rotary bodies in the rollers, and the roller gears of the second and third rotary bodies are engaged with each other.

The roller of the first or third rotating body is lower than the roller of the second rotating body,

In addition, it is preferable that the first, second or third rotation shaft, or all of them are provided with a locking portion, and further includes a locking means including a locker that abuts against the upper locking portion to prevent rotation of the rotation shaft.

As described above, in the power transmission device according to the present invention, the first operating part and the third operating part arranged before and after the second operating part respectively form a cross shaft gear with the second operating part, so that the interlocking is achieved by the roller gear. With this configuration, the power transmission efficiency can be maximized by the roller gear with less friction loss when power is transmitted from the first operating part to the second operating part and from the second operating part to the third operating part, and the first operating part or For the smooth contact and easy mounting of the roller provided in the third operating part and the roller provided in the second operating part, the former roller is relatively lower than the latter roller. Locking by manual or automatic (wireless signal control) by installing a locking device on the rotating shaft of the second operation part corresponding to the relay member interposed in the middle in the process of transmitting the stepping force to the rear wheel through the crank Or unlocked, and the locking means is in the locked position by, for example, a spring force in the absence of an electrical signal, and when the electrical signal comes in, it is magnetized by a solenoid coil to operate the locker so that the locker The locking means may be moved to a position that does not interfere with the locking projection, and may be in the unlocked state. Furthermore, in order to prevent a situation in which the locking function cannot be performed when the locking protrusion is one and the locking projection descends to come into contact with the locking lock. Because the lockers are separated from each other by two, the lockers of one position can be moved to the locked position even if the locking projection of the rotary shaft is in any position, which can help to prevent theft or safety accidents.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

As the present invention allows for various changes and numerous modifications, various embodiments (or embodiments) are described in detail in the text. However, this is not intended to limit the present invention to the specific form disclosed, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In each of the drawings, the same reference numerals, in particular, the tens and ones digits, or the same digits, tens, ones, and alphabets refer to members having the same or similar functions, and unless otherwise specified, each member in the figures The member referred to by the reference numeral may be regarded as a member conforming to these criteria.

The terms used in the present specification and the like are merely used to describe specific embodiments (a sun, an aspect) (or embodiments) and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification and the like, the terms “comprises” or “consists” are intended to designate that the features, numbers, steps, operations, components, parts, or combinations thereof described on the specification are present, and that one or more other features are present. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

The first to the second, the second to the third, and the fourth to the present specification are referred to to distinguish different components, and are not limited to the manufactured order, In the description and claims, the names may not coincide.

In the following description, the power transmission device A according to the present invention will be described mainly for the case for a chainless bicycle, but the present invention is not limited thereto.

 2 (a) is a plan sectional view showing a first operation part (or a third operation part), (b) is a side view of (a), and (a) is a plan sectional view showing a second operation part. (B) is a side view of (a).

1, the first operating part 10 side is defined as a front side, and the third operating part 30 side is defined as a rear side.

In a non-chain bicycle, the first operating part 10 corresponds to the crankshaft side, and the third operating part 30 corresponds to the rear wheel hub driven shaft side, and the connection between the two (10) and (30) serves as a relay. It is made by the second operation unit 20.

As shown in Figures 1 to 4, the power transmission device (A) according to the present invention is largely composed of the first operating unit 10, the second operating unit 20, and the third operating unit (30). Can be

The power is generated by the pedaling force of the pedals provided in the crankshaft in the non-chain bicycle, and the first operating part 10 serving as a driving role, the second operating part 20 serving as a relay, and the rear wheel hub serving as a follower The division of the 3rd operation part 30 of the side is for convenience,

Inputs and outputs can be selected arbitrarily as needed.

In addition, sprocket (or crown gear) type gears and roller gears are interlocked with each other.

In the present invention, in order to reduce the sliding friction resistance and to reduce the vibration and noise

The roller is in close contact with the roller to transmit power.

The roller-to-roller contact may be implemented at both ends of the second operation part 20 or at only one end as necessary.

As shown in Figs. 1 to 3, which relate to the form in which roller-to-roller contact is made at both ends of the second operating portion 20,

The first to third operating units 10, 20, 30 are respectively

It has a 1st thru | or 3rd rotational shaft 11, 21, 31, and the 1st-3rd rotational bodies 12, 22, 32 provided on each rotational shaft,

Each rotating body also has roller gears 13, 23, 33 in contact with each other.

Each roller gear is fixed through the shaft pins 131, 231, 331 in the gap between the fixing teeth 121, 122, 221, 222, 321, 322 of each of the rotors 12, 22, 32.

Each shaft pin penetrates the fixing hole and is firmly fixed in an interference fit manner.

Compared to the roller gears 13 and 33 of the first and third rotating bodies 12 and 32 provided on the outer circumferential surface of each rotating body,

The second rotating body 22 which forms a cross-axis gear with the first and third rotating bodies 12 and 32 is

The roller gears 23 of the front driving side second rotating body 22A and the rear driven side second rotating body 22B are arranged radially with respect to the second rotating shaft 21,

The roller 232 and the shaft pin 231 are also arranged accordingly.

In addition, the rollers 132 and 332 of the first and third rotating bodies 12 and 32 are cylindrical,

The roller 232 of the second rotating body 22 has a truncated cone-like shape so that the rollers 232 do not generate friction between the central shaft portions.

In addition, the rollers 132 and 332 of the first or third rotating body have a lower height than the rollers 232 of the second rotating body.

 The fixing teeth 121, 122, 321, 322 are prevented from colliding with each part of the second rotating body 22 or generating friction.

In addition, since the rollers 132 and 332 of the first or third rotating body have a low height, a contact portion with the roller 232 of the second rotating body can be selected from the center of the second rotating body roller 232 to the outside.

By finely adjusting the engagement position of the second rotary body 22 with respect to the first or third rotary bodies 12 and 32

The closer roller can be engaged

Frame dimensional deviations of several mm to several cm can be ensured to avoid vibration, noise and other power loss problems.

However, the condition that 'the roller of the first or third rotating body is lower than the roller of the second rotating body',

Or more broadly, the condition that there should be no problem with power transmission.

Rollers of various shapes and sizes to meet may be introduced.

This extension of the scope of protection of the present invention also allows the shaft pins 131 and 331 for the rollers 132 and 332 of the first and third rotary bodies to be parallel to the first and third rotary shafts 11 and 31. Direction,

The shaft pins 231 for the rollers 232 of the second rotating body are orthogonal to the second rotating shaft 21 and arranged radially at various angles as necessary, and thus the rollers and the rollers may be deformed in contact with each other. have.

In addition, in the drawings, the first and third rotating bodies 12 and 32 are integrally fixed to the rollers 132 and 332 between the fixing teeth 121 and 122 and 321 and 322.

Assembling two disk powders having fixed teeth 121, 321 and fixed teeth 122, 322 one by one (fixed by welding, riveting, bolting, etc.) to form one rotor 12, 32 Can be manufactured,

This method can be applied to the manufacture of the second rotating body 22 as necessary.

In FIG. 6, which is a picture of assembling the first to third operation units 10, 20, 30, and each of the housings H1, H2, and H3, in order to prevent idling when the rotary shafts 11 and 31 are coupled to each other. The key grooves of the formed first and third rotating bodies 12 and 32 can be confirmed.

On the other hand, as can be seen in the actual product assembly photograph (first and third rotation axis is omitted) of Figures 4 and 6,

The first to third operation units 10, 20, 30 are all provided with first to third housings H1, H2, and H3.

Bearings are suitably arranged between the respective housings H1, H2, H3 and the first to third rotating shafts 11, 21, 31 to ensure smooth rotation.

As can be seen in FIG. 4, the second rotary shaft 21 is not orthogonal to the first and third rotary shafts 10 and 30, but finely oblique (eg, 3 to 15 degrees, preferably 4). ~ 8 degrees),

It is configured to obtain friction and noise reduction effect and to enable smooth power transmission.

In addition, the first and third housings H1 and H3 have contact connecting portions (obtained by bolt fastening methods) inclined with respect to the second housing H2 in accordance with the diagonal arrangement of the second rotation shaft (FIGS. 4 and 6). Reference).

In addition, the outer diameters of the rollers 132, 232, 332 are larger than the outer diameters of the fixed teeth 121, 122, 221, 222, 321, 322,

To prevent a situation where the roller 232 of the second rotating body 22 and the fixing teeth 121, 122, 321, 322 of the first and third rotating bodies 12 and 32 contact and cause interference.

The fixed tooth is preferably introduced with a chamfer,

Considering the case in which the second rotating shaft 21 forms an oblique line as shown in FIG.

In the first rotating body 12, the chamfer portion 121a is formed at the upper portion (outside when the rear wheel position is set to the inner side) on the basis of the drawing.

In the third rotary body 32, a chamfer portion 322a is formed at the lower portion (inner side when the rear wheel position is set to the inner side).

Next, the rotation shaft locking means (L) for the power transmission device (A) according to the present invention shown in Figs. 4 and 5 will be described.

The concept of the locking means (L) can be used in various ways for locking a two-wheeled vehicle, such as a motorcycle, motorcycles or other power transmission rotation shaft,

Hereinafter, it will be described on the assumption that it is applied to the power transmission device (A) for the chainless bicycle for convenience.

In Figure 4, the rotation shaft locking means (L) according to the present invention in the power transmission device (A) for the chainless bicycle is coupled to the second housing (H2) surrounding the second rotary shaft (21) via a bearing. ,

By applying a lock using a common key or a known wireless signal lock that is used as a car or an expensive bicycle lock,

It includes a locker which is moved back and forth by manual operation by a key or automatic operation by an electronic key.

The locker is in contact with the engaging portion 21A (see FIG. 5E) formed at the corresponding portion of the rotation shaft 21 to prevent the rotation of the second rotation shaft 21.

In Figure 4, the locking means (L) is shown in the form utilizing the solenoid 43 built in the case 47, the wireless receiving unit (or wired receiving unit, if necessary) to energize by applying an operation signal to the solenoid is omitted have.

The case 47 incorporates each component constituting the electronic locking means L, and the locking means is mounted to the second housing 27 through the case.

The solenoid 43 embedded in the case 47 becomes a magnetic material when power is applied by a wireless (or wired) signal (remote control by a remote controller will be common).

The magnetic force of this solenoid actuates the spool 45,

The spool operates in a direction opposite to the elasticity of the spring (conical spring in the figure) 43b in operation to advance and lock the locker 41.

In addition, the solenoid 43, the spool 45, and the spring 43B in the case 47 are fixed in a fixed state by the cap 43a at the bottom thereof.

4 schematically shows that when the solenoid 43 is not operated in the locking means L, the locker 41 is advanced by the elasticity of the spring 43b and is constantly caught by the second rotating shaft 21. Although shown in contact with the portion 21A to stay in the locked state,

On the contrary, the elasticity of the spring may be configured such that the locker retracts and is always unlocked when the solenoid is not operated.

In addition, the engaging portion (21A) formed at the corresponding position of the rotary shaft 21 does not protrude beyond the outer diameter of the portion of the other rotary shaft, but corresponds to the non-continuous portion of the annular groove (21a) or

(See side view in [E] of FIG. 5 and cross-sectional view taken along line “A-A '”),

If necessary, it may be deformed to protrude to the outer surface of the rotating shaft.

In addition, as shown in [A] to [D] of FIG. 5, the locking portion 21A of the second rotary shaft 21 is one, and the lockers 41 of the locking means are spaced apart from each other by two. Can be transformed into

This is to ensure that the locker 41 of one place can be moved to the locked position even if the locking portion 21A of the second rotary shaft 21 is in any position.

Through this, it is possible to prevent a situation in which a locker cannot be performed when there is only one locker and the engaging portion of the rotating shaft descends to come into contact with the locker.

In the drawings, the two lockers are provided with respective solenoids 43 and the like,

If necessary, two rockers may be deformed by one solenoid or the like.

As can be seen from [A] [B] [C] of Fig. 5, regardless of the position of the locking portion 21A, locking by at least one locker 41 is realized.

Functions such as prevention of theft and the prevention of safety accidents that may occur when a child rides a bicycle, etc. can be more fully achieved.

In addition, if the locker is locked by the forward movement of the locker,

When the second rotary shaft 21 rotates

When there is only one locker and the projection is not in contact with the rocker, the rotation of the rotating shaft may cause the rocker or the rotating shaft to be damaged or worn out (it may be damaged by repeated impact).

In the case of two lockers, the interval between the rotation shaft engaging portion 21A and the rocker is short, so that the impact on the rocker or the rotating shaft is reduced even in intentional or unintentional operation, thereby preventing damage or wear.

In the above description, although the conventionally known techniques related to the chainless bicycle or the manual or automatic operation locking device and the like are omitted, those skilled in the art can easily infer, infer and reproduce the same.

In addition, in the above description of the present invention, the power transmission device having a specific shape and structure has been described with reference to the accompanying drawings, but the present invention can be variously modified and changed by those skilled in the art. It should be interpreted as falling within the protection scope of the invention.

1 is a schematic side view of a power transmission device according to the present invention.

2 is a view showing a first operating part and a third operating part in the power transmission device according to the present invention;

Figure 3 is a view showing a second operation unit in the power transmission device according to the present invention.

Figure 4 is a plan view of the engaged state of the locking device for a power transmission device according to the invention.

5 is a main view of the locking device for the power train according to the present invention;

Figure 6 is a photograph assembly of the power transmission device according to the invention.

<Description of Symbols for Main Parts of Drawings>

10: first operation part

11: first rotating shaft 12: first rotating body

13: roller gear 131: shaft pin

132: roller

20: second operation part

21: second rotating shaft 22: second rotating body

22A: driving side second rotating body 22B: driven side second rotating body

23: corresponding roller gear 231: shaft pin

232: Roller

30: third operation part

31: third rotating shaft 32: third rotating body

33: roller gear 331: shaft pin

332: roller

H1, H2, H3: 2 housing L: Locking means

41: Rocker 43: Solenoid

Claims (4)

A first operating part including a first rotating shaft and a first rotating body provided on the first rotating shaft; A second operating part including a second rotating shaft, a second rotating body provided at one end or both ends on the second rotating shaft and forming a cross shaft gear with the first rotating body of the first operating part; , &Lt; / RTI &gt; It has a plurality of roller gears arranged around the first rotating body of the first operating portion, Having a plurality of corresponding roller gears arranged around the second rotating body of the second operating part And the two roller gears are engaged with each other. The method of claim 1, And a third operating part including a third rotating shaft, a third rotating body provided on the third rotating shaft, and a plurality of roller gears arranged around the third rotating body. The second fitting part has two second rotating bodies at both ends of the second rotating shaft, And the roller gears of the second and third rotating bodies mesh with each other to operate. The method according to claim 1 or 2, The roller of the first or third rotating body is a power transmission device, characterized in that the height is lower than the roller of the second rotating body. The method according to claim 1 or 2, The first, second or third rotary shaft, or both are provided with a locking portion, The power transmission device further comprises a locking means including a locker in contact with the stop engaging portion to prevent rotation of the rotating shaft.

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