KR102176762B1 - Auto transmission - Google Patents

Abstract

The present invention relates to an automatic transmission, wherein a low-speed gear and a high-speed gear are installed on a drive shaft, and a power transmission unit for transmitting low-speed and high-speed rotational force is provided on one shaft, thereby enabling automatic transmission with a minimum gear device. It relates to an automatic transmission.
An automatic transmission according to the present invention is a transmission that receives a rotational force from a rotational shaft of a motor and outputs a transmission to an output shaft, but outputs at different transmission ratios according to the rotational speed of the motor, which is connected to the rotational axis of the motor, and is part of the axis. A drive shaft provided with a first low-speed gear on the outer periphery; A centrifugal clutch that is provided at one end of the drive shaft and rotates with the drive shaft and extends outward so that a radius increases when it rotates above a preset speed, and the centrifugal clutch provided in a form surrounding the centrifugal clutch and rotated by the expanded centrifugal clutch A high-speed switching unit including a housing and a first high-speed gear extending to the housing and having a gear size larger than that of the first low-speed gear; A second low-speed gear gear-coupled with the first low-speed gear, a second high-speed gear gear-coupled with the first high-speed gear, a power transmission shaft connecting the second low-speed gear and the second high-speed gear, and the first 2 A power transmission unit including a one-way clutch provided between the low-speed gear and the power transmission shaft; A second low speed gear-coupled to the first low speed gear and the first high speed gear, respectively, when the drive shaft rotates above a preset speed, including an output part gear-coupled with a transmission gear provided on the power transmission shaft The gear and the second high speed gear are characterized in that they can rotate at different speeds on the same axis by the action of the one-way clutch.
The automatic transmission according to the present invention is provided with an automatic transmission in which a power transmission shaft rotating at different speeds and a second low speed gear can exist on the same shaft by installing a one-way clutch between the power transmission shaft and the second low speed gear. .

Description

Automatic transmission{AUTO TRANSMISSION}

The present invention relates to an automatic transmission, wherein a low-speed gear and a high-speed gear are installed on a drive shaft, and a power transmission unit for transmitting low-speed and high-speed rotational force is provided on one shaft, thereby enabling automatic transmission with a minimum gear device. It relates to an automatic transmission.

In general, vehicles such as motorcycles, automobiles, and scooters are provided with transmissions to improve driving performance. These transmissions are designed to be manually or automatically shiftable, and gear devices of various sizes are used to enable multi-speed shifting. However, since conventional transmissions are mainly produced with high-speed multi-stage transmissions in order to achieve high speed, the size of the transmission is increased and the cost is high due to the need for various parts, and there is a problem in that the smooth transmission is not achieved nonetheless. .

Therefore, in the present invention, it is intended to propose a technology of a small number of stages, which enables smooth shifting and is compact and has high durability.

In the prior art similar to the present invention, there is Korean Patent No. 10-1791010'motor transmission'. In the similar prior art, in a transmission that receives a rotational force from a rotational shaft of a motor and outputs a shift to an output shaft, but outputs one-way at different speed ratios according to the forward or reverse rotation of the motor rotational shaft, the one-way clutch inclined surface is 1 Two or more drive shafts, a carrier for accommodating a forward restraint body and a reverse restraint body at radially equal intervals with a predetermined phase angle difference on both sides, and the drive shaft located outside the forward and reverse restraints. A forward output ring and a reverse output ring of the double one-way clutch including a double one-way clutch including a forward output ring and a reverse output ring that selectively rotates according to the rotation direction, and a plurality of gears that rotate in engagement with each other. It is composed of a low-speed and high-speed rotational force transmission means that independently receives rotational force from and rotates the output shaft at a transmission ratio of different paths, and the double one-way clutch is allowed to input a reverse direction to the rotational direction in which the output shaft is output, and , The carrier of the double one-way clutch has a flange-shaped extension part formed between the forward output ring and the reverse output ring, and the extension part has an elastic body elastically supporting a ball toward the forward output ring and the reverse output ring. Is accommodated, and the forward output ring and the reverse output ring disclose a transmission technology for a motor, characterized in that a groove is formed to correspond to the ball.

However, in the prior art, the gear units responsible for the low speed and the high speed exist on different shafts, so that the size of the transmission device has to increase as the configuration of the transmission device increases, and there is a problem such as an increase in cost.

Korean Patent Registration No. 10-1791010'Motor Transmission'

The present invention was conceived to solve the problems of the prior art as described above, and by installing a one-way clutch between the power transmission shaft and the second low speed gear, the power transmission shaft and the second low speed gear rotating at different speeds are It provides an automatic transmission that can exist on the same axis.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems to be solved by the present invention not mentioned here are to those of ordinary skill in the technical field to which the present invention belongs from the following description. It can be clearly understood.

The automatic transmission to which the transmission of the present invention is applied for achieving the above-described problem is a main body case in which the power transmission unit 200, the power conversion unit 300, and the output unit 400 are located inside the unit; And A drive shaft 100 supported on both sides of the main body case 20 and rotatably provided by a bearing so as to be rotated by receiving a rotational force from a motor 10 on one side of the main body case 20; and on one side of the drive shaft 100 The first low-speed gear 210 is axially coupled, the first high-speed gear 220 is coupled to the other side of the drive shaft 100 with a bearing or bush, and the first high-speed gear 220 extends to the side to form a cup-shaped clutch housing. (240) is formed, the first spline (110) of the drive shaft (100) is coupled to the side of the first high-speed gear (220), and the clutch housing (240) by the disk (231) when the drive shaft (100) rotates at high speed. ) A centrifugal clutch 230 provided inside the clutch housing to transmit power to the power transmission unit 200 for transmitting power; and a second low speed gear gear-coupled to the first low speed gear 210 310 and the second high-speed gear 320 that is gear-coupled with the first high-speed gear 220 is axially coupled to the driven shaft 330 that is supported by bearings on both sides of the body case 20 and is rotatable, and the second low-speed gear 310 is a first helical gear on the outer circumferential surface of a cup shape on one side of the outer ring 311 of the second low speed gear 310 by a built-in one-way clutch supported by a bearing 313 between the inner ring 312 and the outer ring 311 The second helical gear (345) is formed on the inner circumferential surface so that the 335 is formed and can be gear-coupled to the first helical gear 335, which is one side of the second high-speed gear 320 1 In the direction of the helical gear 335, an output gear 326 that is smaller than the number of gears of the second high speed gear 320 is provided on the driven shaft 330 to be spaced apart from the first helical gear 335 by a predetermined distance ( 300); and

The ring gear 410 coupled with the output gear 326 is bearing-supported on both sides of the body case 20 and includes an output shaft 430 rotatable.

In addition, the present invention is provided with a first ratchet gear 327 in the direction of the second low speed gear 310, which is a side end surface of the output gear 326 provided on one side of the second high speed gear 320, and the second It is characterized in that it comprises a second ratchet gear 347 provided in the direction of the first ratchet gear 327, which is one end surface of the connection driver 340 on which the helical gear 345 is formed.

In addition, in the present invention, a fixing pin 342 protruding from the outer circumferential surface of the connection driver 340 is inserted between the blocking wall 22 on the inner surface of the body case 20, and the second helical gear 345 is inserted into the inner circumferential surface. It characterized in that it comprises a connection driver 340 is formed.

The automatic transmission according to the present invention is capable of shifting by a simple device when the driving speed is higher than a certain speed due to the operation of the centrifugal clutch using centrifugal force, and can be driven by using the same drive shaft in the forward direction and the reverse direction, and By installing a one-way clutch between the two low speed gears, an automatic transmission in which a driven shaft rotating at different speeds and a second low speed gear can exist on the same shaft is provided.

1 is a diagram showing a combined state of a motor and a body case in which an automatic transmission according to the present invention is installed.
2 is a view showing an exploded view of an automatic transmission, a motor, and a body case according to the present invention.
3 is a view showing the state of the automatic transmission according to the present invention.
4 is a view showing the state of the centrifugal clutch of the automatic transmission according to the present invention.
5 is a view showing an exploded view of the power conversion unit of the automatic transmission according to the present invention.
6 is a view showing the appearance of the clutch of the power conversion unit of the automatic transmission according to the present invention.

Specific matters, including the problems to be solved, means for solving the problems, and effects of the invention as described above, are included in the following examples and drawings. Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings.

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

1 to 6, the automatic transmission according to the present invention may be configured to include a drive shaft 100, a power transmission unit 200, a power conversion unit 300, and an output unit 400. .

First, the drive shaft 100 is provided.

Specifically, as shown in Figs. 2 and 3, the drive shaft 100 is a configuration in which both sides are axially supported by the body case 20 by bearings so as to be rotatably provided, and one side of the drive shaft 100 has a part of the outer circumferential surface. The configuration is such that the first spline 110 is formed by a predetermined length.

Meanwhile, the drive shaft 100 is driven by a motor 10 installed on the side of the main body case 20 in a configuration that transmits an operating driving force, and the rotational force of the motor 10 is less than a preset speed (hereinafter referred to as "low speed"). It is controlled so that the driving force can be output at a speed higher than or equal to a preset speed (hereinafter referred to as "high speed").

The rotational force is transmitted to the drive shaft 100 by the power transmission unit 200. First, the power transmission unit 200 is coupled to the inner circumferential surface of the centrifugal clutch 230 to the first spline 110 of the drive shaft 100 The first high speed gear 220 on one side of the centrifugal clutch 230 is rotatably supported by a bearing or a bush coupling to the drive shaft 100, and the first high speed gear 220 is placed at a predetermined distance. The first low speed gear 210 is axially coupled to the drive shaft 100.

The first high-speed gear 220 axially supported by the drive shaft 100 is a cup-shaped clutch capable of wrapping the entire outer circumference of the centrifugal clutch 230 slightly larger than the outer circumferential surface of the centrifugal clutch 230 in the direction of the centrifugal clutch 230 The housing 240 is formed.

When the drive shaft 100 rotates at high speed, the centrifugal clutch 230 is coupled to the first spline 110 provided at one end of the drive shaft 100 and transmits the rotational force that rotates at high speed to the clutch housing 240 It is a configuration to do.

The centrifugal clutch 230 is provided so that a plurality of disks 231 extending in an outward direction by a centrifugal force are stacked and coupled to the fixing pin 232 to be rotated, and the disks 231 adjacent to each other are provided with a recovery spring ( 233) is fastened. When rotating at a low speed, the disk 231 cannot be expanded outwardly by the recovery spring 233, and when rotating at a high speed, the disk 231 is expanded outwardly by a rotational force, and thus the clutch housing 240 is In close contact with the inner wall, the clutch housing 240 is rotated. That is, the high-speed rotation of the winsim clutch 230 refers to a reference speed at which the disk 231 overcomes the elastic force of the recovery spring 233 and extends outward. The preset speed can be adjusted by adjusting the tension of the recovery spring 233. In addition, rotation of the clutch housing 240 rotates the first high-speed gear 220 configured to extend from the clutch housing 240.

A large number of gears (dimensions) of the first high speed gear 220 coupled with a bearing or bush on one side of the drive shaft 100 and the first low speed gear 210 axially coupled to the drive shaft 100 are formed, and power conversion The second high speed gear 320 and the second low speed gear 310 coupled to the driven shaft 330 of the part 300 are respectively the first high speed gear 320 and the first low speed gear 310 and The second high-speed gear 320 is gear-coupled to the first high-speed gear 220 and the rotational speed increased than the rotational speed of the first high-speed gear 220 and the second high-speed gear 320. Will be delivered to.

The driven shaft 330 is provided so as to be rotatably supported by bearings on both sides of the main body case 20, such as the drive shaft 100. One side of the driven shaft 330 is provided with a predetermined length on a part of the outer peripheral surface. This is a configuration in which two splines 331 are formed.

The second low-speed gear 310 is coupled to the second spline 331 formed on one side of the driven shaft 330 to be rotated, and the second high-speed gear 320 is coupled to the other side of the driven shaft 330 The second low speed gear 310 and the second high speed gear 320 are coupled to the shaft and rotated.

The output gear 326 is axially coupled to the driven shaft 330 in the direction of the second low speed gear 310 of the second high speed gear 320 coupled to the other side of the driven shaft 330, and the output gear 326 The first ratchet gear 327 is formed in the direction of the second low speed gear 310 which is a side cross-section.

The output gear 326, which is axially coupled concentrically of the driven shaft 330 from the second high speed gear 320 and the second low speed gear 310 to transmit rotational force, is transferred to the ring gear 410 of the output unit 400. The rotational force is transmitted and the rotational force is supplied to the output shaft 430 axially coupled to the ring gear 410. The output shaft 430 is axially coupled with the ring gear 410, and both sides are supported by the body case 20 by bearings to be rotatably provided.

The second low speed gear 310 is provided with a one-way clutch supported by a clutch bearing 313 between the inner ring 312 and the outer ring 311, and the inner ring 312 is a second spline 331 of the driven shaft 330 ), and on the outer circumferential surface of the outer ring 311, the second low speed gear 310 is gear-coupled with the first low speed gear 210, and a hollow cup shape on the driven shaft 330 on one side to the outer ring 311 of the one-way clutch A first helical gear 335 is formed on the outer peripheral surface of the furnace.

A second helical gear 345 is formed on the inner circumferential surface of the cylindrical shape so as to mesh with the gear of the first helical gear 335 and meshed with the first helical gear 335, A connection drive 340 provided with a second ratchet gear 347 in the direction of the first ratchet gear 327 is provided, and the first helical gear 335 is formed by being spaced apart from the first ratchet gear 327 by a predetermined width. The first ratchet gear 327 and the second ratchet gear 347 are meshed with the first ratchet gear 327 formed on the output gear 326 by moving the connection drive 340.

The fixing pin 342 protrudes from the outer circumferential surface of the connection driver 340, and the protruding fixing pin 342 is inserted between the blocking walls 22 installed inside the main body case 20, and the connection driver By supporting the 340, when the first helical gear 335 is rotated, the second helical gear 345 is supported by the fixing pin 340 to control the rotation of the connection drive 340.

At this time, when the first helical gear 355 formed on the side of the outer ring 311 of the second low speed gear 310 rotates in the inclined direction of the gear teeth, that is, when rotating at low or high speed, the main body case 20 is blocked. The fixing pin 342 is inserted between the walls 22, so that the first helical gear 335 rotates, but the connection driver 340 engaged by the first helical gear 335 and the second helical gear 345 is blocked. The first helical gear 335 and the connection driver 340 are supported by fixing pins 342 on 22 so as not to rotate at the same time.

In addition, when the first helical gear 335 rotates in an inclined opposite direction, that is, when it rotates in the reverse direction, the connection driver 340 rotates in an inclined direction to the gear top of the second helical gear 345, The second ratchet gear 347 of 340 is moved in the direction of the first ratchet gear 327, and the first ratchet gear 327 and the second ratchet gear 347 of the connection driver 340 are gear-coupled. 2 The rotational force of the low speed gear 310 is transmitted to the output gear 326.

The output gear 326, which is axially coupled concentrically of the driven shaft 330 from the second high speed gear 320 and the second low speed gear 310 to transmit rotational force, is transferred to the ring gear 410 of the output unit 400. The rotational force is transmitted and the rotational force is supplied to the output shaft 430 axially coupled to the ring gear 410. The output shaft 430 is axially coupled with the ring gear 410, and both sides are supported by the body case 20 by bearings to be rotatably provided.

As described above, when the drive shaft 100 is rotated at a low speed from the motor 10 in the configuration of the present invention, the rotational force is transmitted to the second low speed gear 220 engaged with the first low speed gear 210, and the second one-way clutch structure The rotational force is transmitted to the output gear 326 coupled to the low speed gear 210 and the driven shaft 330 concentric with the output gear 326 and the rotational force is transmitted to the output shaft 430 of the ring gear 410 coupled with the output gear 326 Is supplied.

The number of gears of the first low speed gear 210 is smaller than the number of gears of the first high speed gear 220 and may be different from the number of rotations transmitted to the second low speed gear 310 and the second high speed gear 320, respectively. 1 The high speed gear 220 is coupled to the drive shaft 100 by bearing or bushing, so that the rotational speed of the driven shaft 330 transmitted to the second low speed gear 310 and the second high speed gear 320 is the same. Rotated.

On the other hand, when the drive shaft 100 is rotated at high speed from the motor 10, the first low speed gear 210 is also rotated at high speed, and the drive shaft 100 and the spline-coupled centrifugal clutch on one side of the first high speed gear 220 ( As the disk 231 expands outwardly by the centrifugal force in 230, the rotational force is transmitted to the clutch housing 240, so that the first high-speed gear 220 provided on the side of the clutch housing 240 rotates at high speed. The first high-speed gear 220 has a large number of gears of the first low-speed gear 210, so that the rotational speed of the second high-speed gear 320 is relatively faster than that of the second low-speed gear 310 and is transmitted, respectively.

Here, the second low speed gear 310 rotating at high speed transmits a rotational force to the one-way clutch through the outer ring 311, and the second high speed gear 320 rotating faster than the second low speed gear 310 is a driven shaft ( The inner ring 312 is axially coupled to the driven shaft 330 and the one-way clutch of the second low speed gear 310 coupled to the spline at the rotational speed of the second high speed gear 320. It will rotate faster. At this time, the rotational speed of the inner ring 312 is rotated faster than the outer ring 311 by the one-way clutch provided in the second low speed gear 310, and the second low speed gear 310, which is the outer ring 311, is along the inner ring 312. It rotates at a lower speed than the inner ring 312.

Therefore, the rotational speed of the same shaft 330 is transmitted to the output gear 326 at the rotational speed of the second high-speed gear 320, and the rotational speed is transmitted to the ring gear 410 meshed with the output gear 326.

At this time, when the motor 10 transmits rotational force at low or high speed, the connection driver 340 has a fixing pin 342 inserted between the blocking walls 22 of the main body case 20 so that the first helical gear 335 rotates. However, the connection driver 340 meshed with the first helical gear 335 and the second helical gear 345 is supported by the fixing pin 342 on the blocking wall 22 to move in the direction of the second low speed gear and the second The rotational force of the low speed gear 310 or the second high speed gear 320 is transmitted to the output gear.

In addition, when the motor 10 rotates at a low speed with a reverse rotation, most motorcycles, etc., are used at a low speed when rotating in the reverse direction, and the rotational force is transmitted to the drive shaft 100 at a low speed, and the same as when rotating at a low speed, 1 In the low speed gear 210, only the outer ring 311 rotates because the outer ring 311 is revolved around the inner ring 312 by a one-way clutch in the reverse direction. When the second low speed gear 310 rotates in reverse, the first helical gear 335 provided on the outer ring 311 of the second low speed gear 310 rotates in a direction opposite to the inclined direction of the gear teeth. In the driver 340, the fixing pin 342 is inserted between the blocking wall 22 of the main body case 20 so that the fixing pin 342 is connected to the gear top of the second helical gear 345. The connection driver 340 is moved in the direction of the first ratchet gear 327 by being pushed and rotated in the photo direction, and the second ratchet gear 347 of the connection driver 340 and the first ratchet gear 327 of the output gear are geared. Combined, the rotational force of the second low speed gear 310 is transmitted to the output gear 326. At this time, since the first high-speed gear 220 revolves by a bearing or bush coupling to the drive shaft 100, the rotational speed of the second high-speed gear 320 is rotated equal to the rotational speed of the second low-speed gear 320.

As described above, it will be understood that the technical configuration of the present invention described above can be implemented in other specific forms without changing the technical spirit or essential features of the present invention by those skilled in the art.

Therefore, the embodiments described above are to be understood as illustrative and non-limiting in all respects, and the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and the meaning and scope of the claims and the All changes or modifications derived from the equivalent concept should be interpreted as being included in the scope of the present invention.

10: motor
20: main body case 22: barrier wall
100: drive shaft 110: first spline
200: power transmission unit 210: first low-speed gear 230: centrifugal clutch
231: disk 232: fixing pin 233: recovery spring
240: clutch housing 230: first high speed gear
300: power switching unit 310: second low-speed gear 311: outer ring
312: inner ring 313: clutch bearing 320: second high-speed gear
326: output gear 327: first ratchet gear 330: driven shaft
331: second spline 335: first helical gear 340: connection driver
342: fixing pin 345: second helical gear 347: second ratchet gear
400: output unit 410: ring gear 430: output shaft

Claims (3)

The main body case 20 in which the power transmission unit 200 and the power conversion unit 300 and the output unit 400 are located therein; And
Drive shafts 100 supported on both sides of the body case 20 and rotatably provided by a bearing to receive rotational force from a motor 10 on one side of the body case 20 and rotate; And
The first low speed gear 210 is axially coupled to one side of the drive shaft 100, the first high speed gear 220 is coupled to the other side of the drive shaft 100 with a bearing or bush, and the first high speed gear 220 is lateral A cup-shaped clutch housing 240 is formed, and is coupled to the first spline 110 of the drive shaft 100 on the side of the first high speed gear 220, and the drive shaft 100 rotates at high speed. The centrifugal clutch 230 provided inside the clutch housing 240 is configured to transmit power to the clutch housing 240 by 231 and a power transmission unit 200 for transmitting power; And
A second low speed gear 310 geared to the first low speed gear 210 and a second high speed gear 320 geared to the first high speed gear 220 are bearing-supported on both sides of the body case 20 The second low speed gear 310 is axially coupled to the rotatable driven shaft 330 and has a built-in one-way clutch supported by a bearing 313 between the inner ring 312 and the outer ring 311, so that the second low speed gear 310 A first helical gear 335 is formed on one side of the outer ring 311 of the cup-shaped outer circumferential surface, and a second helical gear 345 is formed on the inner circumferential surface of the hollow shape so that the first helical gear 335 can be geared together. The formed connection driver 340 and the output gear 326 smaller than the number of gears of the second high speed gear 320 in the direction of the first helical gear 335 which is one side of the second high speed gear 320 are the first helical gear 335 ) And the first ratchet in the direction of the second low speed gear 310 which is a side end surface of the output gear 326 provided on one side of the second high speed gear 320 and provided on the driven shaft 330 spaced apart from each other at a predetermined interval. Includes a second ratchet gear 347 provided in the direction of the first ratchet gear 327, which is a side end of the connecting driver 340, which is provided with a gear 327 and a second helical gear 345 formed on the hollow inner peripheral surface Automatic transmission power conversion unit 300, characterized in that; And
An automatic transmission, characterized in that the ring gear 410 coupled with the output gear 326 is bearing-supported on both sides of the body case 20 and includes an output unit 400 provided with an output shaft 430 capable of being rotated. delete The method of claim 1
A connection driver (with a second helical gear 345) formed on the inner circumferential surface by inserting a fixing pin 342 protruding from the outer circumferential surface of the connection driver 340 between the blocking walls 22 on the inner surface of the main body case 20 340), characterized in that the automatic transmission.

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