KR101050313B1 - The power transmission device of chainless bicycle - Google Patents

Abstract

PURPOSE: A non-geared bicycle transmitter is provided to improve generality by adjusting the distance between a pedal axis and a rear wheel rotary shaft. CONSTITUTION: A non-geared bicycle transmitter comprises a first spiral bevel gear, a second spiral bevel gear, a connection shaft, a third spiral bevel gear, a fourth spiral bevel gear, a gear-box(60), and a link frame(70). The link frame is composed of a left connecting member(71), a right connecting member(72), and a length controller(73). One end of the left connecting member is combined with a front-wheel box. The fixed bearing is built in one end of the left connecting member. A first screw thread is formed on the inner circumference of the other end of the left connecting member. A third screw thread is formed on the outer circumference of one end of the length controller. A handle is formed on the center part of the length controller and enables a user to easily grip and rotate.

Description

The power transmission device of chainless bicycle

The present invention relates to a power transmission device of a chainless bicycle having excellent power transmission and assemblability, and more particularly, to overcome a distance deviation between a pedal shaft and a rear wheel rotation shaft of a bicycle generated according to a manufacturer's type. By providing a connection frame that is adjustable in length, not only ensures the universality of use, but also conventionally manufactured by each manufacturer to prevent cost loss by reducing the supply price of the product power transmission to increase the price competitiveness And it relates to a power transmission device of a chainless bicycle excellent in assembly.

In recent years, with the introduction of a five-day workweek by companies, there is an increase in the number of office workers who enjoy hiking on weekends and enjoy hiking (traveling for the purpose of physical training or tourism). As a part of reducing pollution and saving resources, the demand for sales of bicycles, A bicycles, which have been recommended at the national level, has been increasing in recent years. As a result, the development of autonomous bicycles is on the rise.

Such a power transmission device of an autonomous bicycle, as shown in FIG. 1, typically receives a rotational force of the first driving unit 2 and the first driving unit 2, which are provided with rotational force to the closing axis 1 of the bicycle. Connection frame (3) to receive and provide a connecting shaft (3), the second driving unit (4) and the connecting shaft (3) for driving the rear wheel of the bicycle by receiving the rotational force provided from the connecting shaft (3) It is configured to include.

However, the drive units 2 and 4 of the power transmission device of the conventional articulated bicycle are generally used with straight bevel gears, but such straight bevel gears are not smooth in rotational movement, especially when rotated at high speed. There was a problem such as noise generated.

In addition, although the distance between the pedal shaft and the rear wheel rotation shaft is generally standardized, the bicycle may vary from a few millimeters to a few centimeters depending on the manufacturer's type. Since it is necessary to manufacture and provide a connection frame suitable for each manufacturing company, not only enormous cost loss occurs, but also a problem that the product's versatility decreases as the supply price of the product increases by the cost loss that occurs.

Therefore, there is an urgent need to develop a connection frame that can cope with variations occurring according to types of manufacturers.

The present invention has been proposed to solve the above-mentioned problems, the object of which is to adjust the length appropriately to overcome the distance deviation between the pedal axis and the rear wheel rotation axis of the bicycle generated according to the type of manufacturer By providing a connection frame that can be used, not only ensures the versatility of the use, but also is manufactured by each manufacturer in the past to prevent the loss of cost, reducing the supply price of the product, excellent power transmission and assembly ability to increase the price competitiveness The present invention provides a power transmission device for a chainless bicycle.

In addition, by using the spiral bevel gear as a device that receives the rotational force from the pedal shaft and provides the rotational force to the rear wheel, the rotational movement is smooth and the wearability is low. An object of the present invention is to provide a power transmission device of a chainless bicycle having excellent power transmission and assembly ability.

In accordance with an aspect of the present invention, there is provided a power transmission device of a non-chain bicycle having excellent power transmission and assembly ability, the first spiral bevel gear positioned on a pedal shaft to transmit rotational force of the pedal shaft. A second spiral bevel gear meshed with the first spiral bevel gear and rotated perpendicularly; and one end connected to the second spiral bevel gear to transmit a rotational force of the second spiral bevel gear; and the other end of the connecting shaft. A third spiral bevel gear that is connected to and rotated in response to a rotational force of the connection shaft; and a fourth spiral that is engaged orthogonally with the third spiral bevel gear and is rotated on the rear wheel rotation shaft of the bicycle to rotate the rear wheel. A bevel gear; and a front wheel box for accommodating the first and second spiral bevel gears therein, and the third and fourth spiral bevel gears accommodated therein. A gear box including a rear wheel box; and receiving the connection shaft therein, one end of which is coupled to the front wheel box and the other end of which is coupled to the rear wheel box; Including but not limited to
The connection frame is one end is coupled to the front wheel box, one end of the fixed bearing is built-in, the end of the second spiral bevel gear is internally fixed to the inside of the built-in fixed bearing, the first end on the inner peripheral surface of the other end The left connecting body and the other end of the thread is formed, the other end is coupled to the rear wheel box, the inside of the other end of the fixed bearing is embedded, the end of the third spiral bevel gear is internally fixed to the inside of the built-in fixed bearing, In the inner circumferential surface of the right connector is formed a second screw thread, the outer peripheral surface of one end is formed with a third screw thread is fastened to the first screw thread, the fourth screw thread is formed on the outer peripheral surface of the other end is fastened with the second screw thread, The center is characterized in that it comprises a length adjuster is formed a handle for easy gripping.

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In addition, the left side screw is fastened to the third screw thread of the length adjuster of the connecting frame to securely fix the position of the left connector, and the fourth screw thread of the length adjuster of the connecting frame is fastened to Characterized in that it further comprises a fixing portion consisting of the right screw to firmly fix the position.

In addition, the left and right screws of the fixing portion and the outer peripheral surface of the length adjuster knob is characterized in that the knurling is formed to provide ease of use.

According to the power transmission device of the chainless bicycle excellent in power transmission and assembly according to the present invention as described above, it is suitable to overcome the distance deviation between the pedal shaft and the rear wheel rotation shaft of the bicycle generated according to the type of manufacturer By providing a connection frame that is adjusted in length, not only ensures the versatility of use, but also prevents the loss of costs by being manufactured by each manufacturer in the past, thereby reducing the supply price of the product and increasing the price competitiveness. have.

In addition, by using the spiral bevel gear as a device that receives the rotational force from the pedal shaft and provides the rotational force to the rear wheel, the rotational movement is smooth and the wearability is low. There is an effect that can be further improved.

1 is a perspective view of a power transmission device of a conventional artless bicycle
Figure 2 is a perspective view of the power transmission device of the chainless bicycle excellent in power transmission and assembly according to an embodiment of the present invention
3 is an exploded perspective view of the power transmission device of the chainless bicycle excellent in power transmission and assembly shown in FIG.
4 is a cross-sectional view AA of the power transmission device of the chainless bicycle excellent in power transmission and assembly shown in FIG.
FIG. 5 is a partially separated perspective view of a connection frame and a fixing part of a power transmission device of a powerless bicycle assembly having excellent power transmission and assembly shown in FIG. 1;
Figure 6 is a view showing a method of adjusting the length of the connection frame of the power transmission device of the chainless bicycle excellent in power transmission and assembly shown in FIG.
FIG. 7 is a view for explaining a method of installing a power transmission device of a chainless bicycle having excellent power transmission and assembling shown in FIG. 1 to a bicycle; FIG.

On the basis of the accompanying drawings, a power transmission device for a non-chain bicycle having excellent power transmission and assembly performance according to a preferred embodiment of the present invention will be described in detail.

2 to 7 show a power transmission device of a non-chain bicycle excellent in power transmission and assembly according to an embodiment of the present invention, Figure 2 is a bodyless transmission and assembly excellent in accordance with an embodiment of the present invention. Figure 3 is a perspective view of the power transmission device of the bicycle, Figure 3 is an exploded perspective view of the power transmission device of the chainless bicycle excellent in power transmission and assembly shown in Figure 1, Figure 4 is a power transmission and assembly of the shown in FIG. AA sectional view of the power transmission device of this excellent chainless bicycle, Figure 5 is a partial separation perspective view of the connection frame and the fixing portion of the power transmission device of the power transmission and assembly of the excellent power transmission and assembly shown in Figure 1, Figure 6 1 is a view showing a method of adjusting the length of the connecting frame of the power transmission device of the power transmission and assembling excellent bike transmission shown in Figure 1, Figure 7 is a bodyless transmission and assembly ability excellent in Figure 1 sign Each of the drawings for explaining a method of installing the bicycle power transmission device to the bicycle is shown.

As shown in the drawings, the power transmission device 100 of the non-chain bicycle excellent in power transmission and assembly according to an embodiment of the present invention is a first spiral bevel gear (10: spiral bevel gear) and the second spiral A bevel gear 20, a connecting shaft 30, a third spiral bevel gear 40, a fourth spiral bevel gear 50, a gear box 60, and a connecting frame 70 are included. .

As shown in FIGS. 3 and 4, the first spiral bevel gear 10 is positioned on the pedal shaft 1 and configured to transmit the rotational force of the pedal shaft 1.

As shown in FIGS. 3 and 4, the second spiral bevel gear 20 is orthogonally engaged with the first spiral bevel gear 10 to provide rotational force from the first spiral bevel gear 10. Is configured to receive and rotate.

Here, the first and second spiral bevel gears 10 and 20 to be engaged with each other and the third and fourth spiral bevel gears 40 and 50 to be reared are smooth because the rotational movement is smooth because the bite length of the teeth engaged with each other is large. It has the advantage of good transmission efficiency and low wear and long gear life. In particular, even if it rotates at high speed due to its smooth rotation, there is little vibration or noise and thus the product quality can be further improved.

3 and 4, one end of the connecting shaft 30 is connected to the second spiral bevel gear 20 so as to transmit a rotational force of the second spiral bevel gear 20.

As shown in FIG. 3 and FIG. 4, the third spiral bevel gear 40 is connected to the other end of the connecting shaft 30 so as to be rotated by receiving the rotational force of the connecting shaft 30.

As shown in FIGS. 3 and 4, the fourth spiral bevel gear 50 is meshed with the third spiral bevel gear 40 to be orthogonally rotated, and is rotated on the rear wheel 6 of the bicycle 7. Is positioned to rotate the rear wheel 6 to move the bicycle forward.

Here, the spiral bevel gear (10, 20, 40, 50) is preferably made of aluminum to reduce the weight of the product to minimize the inconvenience of running the bicycle due to the weight.

2 to 4, the gear box 60 is a front wheel box 61 for accommodating the first and second spiral bevel gears 10 and 20 therein, and the third and fourth therein. It is configured to include a rear wheel box 62 for receiving the spiral bevel gears (40, 50), not only to stably protect the spiral bevel gears (10, 20, 40, 50) from the external environment, the spiral Bevel gears (10, 20, 40, 50) to prevent the safety accident that may occur due to exposure to the outside.

2 to 5, the connection frame 70 accommodates the connection shaft 30 therein, one end is coupled to the front wheel box 61, the other end is the rear wheel box 62 Combined with, but the overall length is adjusted according to the use situation,

One end is coupled to the front wheel box 61, the fixed bearing (71a) is built into the inside of one end, the end of the second spiral bevel gear 20 is internally fixed inside the fixed bearing (71a) embedded On the inner circumferential surface of the other end, the left connecting body 71 in which the first screw thread 71b is formed, and the other end are combined with the rear wheel box 62, and the fixed bearing 72a is built in the other end. An end of the third spiral bevel gear 40 is internally fixed to the inside of the fixed bearing 72a, and a right connector 72 having a second screw thread 72b formed on an inner circumferential surface of one end thereof, and an outer circumferential surface of one end thereof. A third screw thread 73a is formed to be fastened to the first screw thread 71b, and a fourth screw thread 73b to be fastened to the second screw thread 72b is formed at an outer circumferential surface of the other end, and easy grip and It comprises a length adjusting body 73 is formed a handle 73c for rotation.

Here, of course, the handle 73c may be manufactured and used in the shape of a cylinder or a polygonal pillar.

That is, as shown in Figure 6a by rotating the handle 73c of the length adjuster 73 clockwise or counterclockwise, the entire length of the connecting frame 70 can be easily extended or reduced, so as to manufacture It is possible to effectively overcome the distance deviation between the pedal shaft 1 of the bicycle and the rotation shaft 7 of the rear wheel 6 according to the type of company, thereby ensuring the versatility of use, and the connection frame is conventionally manufactured by the manufacturer. Each product is manufactured to prevent cost loss, thereby reducing the supply price of the product, thereby increasing the price competitiveness of the product.

Also, as shown in FIGS. 2 to 5, the left side is fastened to the third screw thread 73a of the length adjuster 73 of the connecting frame 70 so as to firmly fix the position of the left connective body 71. Screw 81 and the right side thread 82 is fastened to the fourth screw thread (73b) of the length adjuster 73 of the connecting frame 70 to firmly fix the position of the right connector (72). It is configured to further comprise a fixing portion 80.

That is, as shown in FIG. 6B, when the entire length manipulation of the connecting frame 70 is completed by the rotation of the length adjuster 73, the left and right screws 81 and 82 are connected to the left and right sides, respectively. The left and right connecting bodies 71 and 72 of the connecting frame 70 are firmly fixed by close contact with the sieves 71 and 72.

Here, since the knurling 90 is formed on the outer circumferential surface of the left screw 81 and the right screw 82 of the fixing part 80 and the handle 73c of the length adjusting member 73, the frictional force of the surface is increased. It is preferable that the left hand screw 81 and the right hand screw 82 and the length adjuster 73 handle 73c can be rotated more easily.

Power transmission device 100 of the chainless bicycle excellent in power transmission and assembly properties according to an embodiment of the present invention having the configuration as described above is used as installed.

First, as shown in FIG. 7A, a connection shaft 30 is embedded in the connection frame 70, and one end of the connection shaft 30 connects a second spiral bevel gear 20 to the connection shaft 30. The other end of the 30 connects the third spiral bevel gear 40.

In this case, the second and third spiral bevel gears 20 and 40 are inserted into the fixed bearings 71a and 72a embedded at both ends of the connection frame 70 so as to be firmly fixed in position.

Thereafter, as shown in FIG. 7B, the first spiral bevel gear 10 is formed on the closing shaft 1, and the fourth spiral bevel gear 50 is assembled on the rotation shaft 7 of the rear wheel 6. Then, the third spiral bevel gear 40 is the fourth spiral bevel so that the second spiral bevel gear 20 coupled to the connecting frame 70 meshes with the first spiral bevel gear 10. The gear 50 is engaged with the gear 50.

Thereafter, as shown in FIG. 7C, the length adjuster 73 of the connection frame 70 is appropriately rotated to be suitable for the distance between the pedal shaft 1 of the bicycle and the rotation shaft 7 of the rear wheel 6. The length of the connecting frame 70 to be adjusted.

Then, as shown in FIG. 7d, the gearbox 60 and the connection frame 70 are combined to complete the installation.

Although the present invention has been described with reference to the embodiments illustrated in the accompanying drawings, this is by way of example and not limited to the above-described embodiments, various modifications and equivalent embodiments are possible from those skilled in the art. You will understand the point. In addition, modifications by those skilled in the art can be made without departing from the scope of the present invention. Therefore, the scope of the claims in the present invention will not be defined within the scope of the detailed description, but will be defined by the following claims and their technical spirit.

1. Closed shaft 2. First drive part
3. Connecting shaft 4. Second driving part
5. Connecting frame 6. Rear wheel
7. Rotating shaft
10. 1st Spiral Bevel Gear 20. 2nd Spiral Bevel Gear
30. Connecting shaft 40. Third spiral bevel gear
50. Four Spiral Bevel Gear 60. Gearbox
61. Front wheel box 62. Rear wheel box
70. Connecting frame 71. Left connection
71a, 72a. Fixed Bearing 71b. 1st screw thread
72. Right Connector 72b. 2nd screw thread
73. Length regulator 73a. 3rd thread
73b. Fourth screw thread 73c. handle
80. Fixing part 81. Left hand thread
82. Right hand thread 90. Knurled
100. Power transmission device of chainless bicycle with excellent power transmission and assembly

Claims (4)

In the power transmission device of the chainless bicycle which is forward-moved by transmitting the rotational force of the pedal shaft (1) to the rear wheel (6),
A first spiral bevel gear (10) positioned on the pedal shaft (1) to transmit a rotational force of the pedal shaft (1);
A second spiral bevel gear 20 which is engaged with the first spiral bevel gear 10 orthogonally and rotates;
A connecting shaft 30 having one end connected to the second spiral bevel gear 20 to transmit a rotational force of the second spiral bevel gear 20;
A third spiral bevel gear (40) connected to the other end of the connecting shaft (30) and rotated by the rotational force of the connecting shaft (30);
A fourth spiral bevel gear 50 which is engaged with the third spiral bevel gear 40 to be orthogonally rotated and positioned on the rear wheel 6 of the bicycle to rotate the rear wheel 6;
A front wheel box 61 for accommodating the first and second spiral bevel gears 10 and 20 therein, and a rear wheel box 62 for accommodating the third and fourth spiral bevel gears 40 and 50 therein. A gearbox 60; And
The connecting frame 30 is accommodated therein, one end is coupled to the front wheel box 61, the other end is coupled to the rear wheel box 62, the connecting frame 70 is adjusted the overall length according to the use situation Consisting of;
The connection frame 70,
One end is coupled to the front wheel box 61, the fixed bearing (71a) is built into the inside of one end, the end of the second spiral bevel gear 20 is internally fixed inside the fixed bearing (71a) embedded On the inner circumferential surface of the other end, the left connector 71 is formed with a first screw thread (71b),
The other end is coupled to the rear wheel box 62, the other end of the fixed bearing 72a is built-in, the end of the third spiral bevel gear 40 is internally fixed inside the fixed bearing (72a) built-in On the inner circumferential surface of one end, the right connector 72 is formed with a second screw thread (72b),
On the outer peripheral surface of one end is formed a third screw thread (73a) is fastened to the first screw thread (71b), the fourth screw thread (73b) is fastened to the second screw thread (72b) is formed on the outer peripheral surface of the other end, Power transmission device of a chainless bicycle excellent in power transmission and assembly, characterized in that it comprises a length adjuster (73) formed with a handle (73c) for easy gripping and rotation.
delete The method of claim 1,
Left screw 81 is fastened to the third screw thread (73a) of the length adjuster 73 of the connecting frame 70 to firmly fix the position of the left connector 71,
Fixed part 80 is fastened to the fourth screw thread (73b) of the length adjusting member 73 of the connecting frame 70 is composed of a right screw 82 to securely fix the position of the right connecting member (72) Power transmission device of the chainless excellent power transmission and assembly, characterized in that it further comprises a.
The method of claim 3, wherein
Knurling (90) is formed on the outer circumferential surface of the left hand screw 81, the right hand screw 82, and the handle 73c of the length adjusting member 73 of the fixing part 80 to provide convenience of use. Power transmission device of chainless bicycle with excellent power transmission and assembling.

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