Motor-integrated continuously variable transmission

Abstract

The present invention relates to a transmission system for a vehicle including an input shaft to which power is input from an external source, a planetary gear to which a portion of the power is transmitted from the input shaft, a driven shaft to which a portion of the power is transmitted from the input shaft, a first link shaft that rotates by the power transmitted from the driven shaft, a link actuator that operates by the rotation of the first link shaft, a speed change lever that adjusts the speed change ratio of the link actuator, and an output shaft to which power is transmitted from the link actuator and the planetary gear, wherein the link actuator includes an eccentric disk that rotates eccentrically around the first link shaft, a cam that reciprocates up and down by the rotation of the eccentric disk, and a gear that is connected to the cam and transmits power to the output shaft. and a one-way clutch provided between the first link and the output shaft and transmitting power only in one direction of rotation of the output shaft, so that by rotating the first link shaft with the driven shaft, the rotation direction of the first link and the rotation direction of the output shaft are driven in the same direction, and the driven shaft further includes a motor shaft driven by a motor, a reduction gear reduced in speed by the drive shaft and transmitting power to the driven shaft, and a one-way clutch attached to the reduction gear and rotating in one direction, and power is input via the input shaft or the motor shaft in a hybrid system.

Description

[Technical Field]

[0001] The present invention relates to a motor-integrated continuously variable transmission, and more particularly to a motor-integrated continuously variable transmission that can receive power input from an external power rotation or motor force. [Background technology]

[0002] Continuously variable transmissions can be used in many devices that utilize rotational power, such as bicycles, automobiles, motorcycles, and other forms of transportation.

[0003] Recently, there has been an increasing demand for continuously variable transmissions in order to maximize the efficiency of engines, motors, and the like.

[0004] The applicant of the present invention has previously proposed Korean Patent No. 10-1241819 to configure a continuously variable transmission, and the patent document discloses a continuously variable transmission capable of both forward and reverse rotation.

[0005] When a continuously variable transmission is constructed according to the above patent document, the rotation direction of the input gear 310 and the rotation direction of the output shaft 400 are configured to be opposite to each other, as shown in Figure 2 of the patent document. In this case, although forward and reverse rotation is possible, there is a limit to its application to actual products due to the large amount of noise, vibration, and impact that occurs, and it has not been possible to understand the causes of such noise, vibration, and impact. Summary of the Invention [Problem to be solved by the invention]

[0006] The applicant of the present invention has confirmed through long-term research and development that the noise, vibration, and impact generated by the continuously variable transmission according to the above-mentioned patent document are caused by the rotations in the opposite directions, and as a result, provides a motor-integrated continuously variable transmission in which the rotation direction of the input gear (the second driven gear, eccentric disk 501, or first link shaft 51 in the present invention) is configured to be the same as the rotation direction of the output shaft 7, thereby significantly reducing noise, vibration, and impact.

[0007] An object of the present invention is to provide a motor-integrated continuously variable transmission having a structure that significantly reduces noise, vibration, and impact in order to overcome the limitations of conventional continuously variable transmissions as described above.

[0008] Another object of the present invention is to provide a motor-integrated continuously variable transmission that can utilize the power of a motor by receiving rotational input from the motor and rotating it. [Means for solving the problem]

[0009] In order to overcome the limitations of the conventional continuously variable transmission as described above, the present invention provides a continuously variable transmission including an input shaft to which power is input from an external source, planetary gears to which a portion of the power is transmitted from the input shaft, a driven shaft to which a portion of the power is transmitted from the input shaft, a first link shaft which is rotated by the power transmitted from the driven shaft, a link actuator which operates by the rotation of the first link shaft, a speed change lever which adjusts the speed change ratio of the link actuator, and an output shaft to which power is transmitted from the link actuator and the planetary gears, and the link actuator includes an eccentric disk which rotates eccentrically around the first link shaft, a cam which reciprocates up and down by the rotation of the eccentric disk, and an output shaft which is connected to the cam and Provided is a motor-integrated continuously variable transmission that includes a first link that transmits power to a force shaft, and a one-way clutch that is provided between the first link and the output shaft and transmits power only in one direction of rotation of the output shaft, so that by rotating the first link shaft with the driven shaft, the rotational direction of the first link shaft and the rotational direction of the output shaft are driven in the same direction, and the driven shaft further includes a motor shaft that is driven by a motor, a reduction gear that is reduced in speed by the drive shaft and transmits power to the driven shaft, and a one-way clutch that is attached to the reduction gear and rotates in one direction, and power is input via the input shaft or the motor shaft in a hybrid system.

[0010] In addition, the link actuator includes a plurality of link sets, each including the eccentric disk, the cam, the first link, and the one-way clutch. The link set includes a hinge portion connected to one side of the cam, a second link connected so that one end extends from the hinge portion, and a second link shaft connected to the other ends of the plurality of second links, one end of which is connected to the hinge portion and the other end of which is connected to the one-way clutch. This allows the position of the second link shaft to be adjusted by the shift lever.

[0011] The speed change lever may include a second link shaft adjusting portion connected to both ends of the second link shaft, a second link shaft adjusting shaft fixed at a position spaced a predetermined distance from the second link shaft, and an operating portion extending from one side of the second link shaft adjusting shaft in a direction perpendicular to the second link shaft adjusting shaft and rotating within a predetermined angle range based on the second link shaft adjusting shaft.

[0012] In addition, the planetary gears include a ring gear that is circumscribing a first driving gear formed on the input shaft and has teeth formed on its outer and inner peripheral surfaces; a plurality of satellite gears that are inscribed in the ring gear; a sun gear that is located at the center of the ring gear and is circumscribing the satellite gears; and a carrier that is connected to the plurality of satellite gears, has a central axis that is concentric with the input shaft, and has a predetermined hollow formed so that the input shaft passes through, so that the one-way clutch transmits power to the carrier and is not directly connected to the output shaft.

[0013] The input shaft may include a first driving gear that transmits power to the planetary gears, and the driven shaft may include a first driven gear connected to the first driving gear and having a gear ratio such that the driven shaft is accelerated compared to the input shaft, a bearing that supports the driven shaft spaced a predetermined distance from the input shaft and has a central axis parallel to the input shaft, and a second driving gear formed to have a larger diameter than the first driven gear, and the first link shaft may include a second driven gear connected to the second driving gear and having a gear ratio such that the first link shaft is accelerated compared to the driven shaft. [Effects of the Invention]

[0014] According to an embodiment of the present invention, by configuring the rotation direction of the second driven gear, eccentric disk 501 or first link shaft 51 to be the same as the rotation direction of the output shaft 7, noise, vibration and impact can be significantly reduced.

[0015] Furthermore, in order to resolve the problem of unstable gear shifting when the input rotational speed is low due to the characteristics of the link actuator, a predetermined multi-speed gear can be provided to increase the rotational speed transmitted to the link actuator, thereby improving gear shift stability.

[0016] Furthermore, by arranging the pivot point (second link shaft adjusting shaft 62) that adjusts the speed ratio of the link actuator so that it is positioned outside the link actuator, interference between the various components can be prevented.

[0017] It is also constructed as a hybrid type so that it can be rotated by external power or motor power. [Brief explanation of the drawings]

[0018] [Figure 1] 1 is a perspective view of a continuously variable transmission according to an embodiment of the present invention; [Figure 2] ~ [Figure 4] 1 is a perspective view of a continuously variable transmission according to an embodiment of the present invention with a frame removed; [Figure 5] 5A to 5C are diagrams illustrating a process of shifting speeds in a continuously variable transmission according to an embodiment of the present invention. [Figure 6] FIG. 2 is an exploded perspective view of a planetary gear applied to the continuously variable transmission according to the embodiment of the present invention. [Figure 7] 1 is a perspective view of a motor-integrated continuously variable transmission according to an embodiment of the present invention; [Figure 8] FIG. 8 is a front view of FIG. DETAILED DESCRIPTION OF THE INVENTION

[0019] Various embodiments of the present specification will be described below with reference to the accompanying drawings. However, it should be understood that this is not intended to limit the technology described herein to a specific embodiment, but includes various modifications, equivalents, and / or alternatives of the embodiments of the present specification. With regard to the description of the drawings, similar reference numerals may be used for similar components.

[0020] In this specification, the terms "have," "can have," "include," or "can include" refer to the presence of a given feature (e.g., a value, function, operation, or component such as a part) and do not exclude the presence of additional features.

[0021] As used herein, phrases such as "A or B," "at least one of A and / or B," or "one or more of A and / or B" can include all possible combinations of the items listed together. For example, "A or B," "at least one of A and B," or "at least one of A or B" can refer to (1) at least one A, (2) at least one B, or (3) both at least one A and at least one B.

[0022] As used herein, terms such as "first," "second," "first," or "second" may modify various components regardless of order and / or importance, and are used merely to distinguish one component from another, not to limit the components. For example, a first user device and a second user device may represent different user devices regardless of order or importance. For example, a first component may also be referred to as a second component, and similarly, a second component may also be referred to as a first component, without departing from the scope of the invention as described herein.

[0023] When a component (e.g., a first component) is referred to as being "operatively or communicatively coupled with / to" another component (e.g., a second component), it should be understood that the component is directly coupled to the other component or coupled via another component (e.g., a third component). In contrast, when a component (e.g., a first component) is referred to as being "directly coupled" to another component (e.g., a second component), it should be understood that there is no intervening component (e.g., a third component) between the component and the other component.

[0024] The terms used in this specification are used only to describe specific embodiments and do not limit the scope of other embodiments. A singular expression may include a plural expression unless the context clearly indicates a different meaning. Terms used in this specification, including technical or scientific terms, may have the same meaning as commonly understood by a person of ordinary skill in the art described herein. Terms used in this specification that are defined in a general dictionary may be interpreted in the same or similar sense as the contextual meaning of the relevant art, and should not be interpreted in an idealized or overly formal sense unless expressly defined in this specification. In some cases, even terms defined in this specification may not be interpreted to exclude embodiments of this specification.

[0025] It goes without saying that various modifications may be made by a person having ordinary skill in the art to which the invention pertains without departing from the gist of the invention as claimed in the claims of the invention, and such modifications should not be understood separately from the technical idea or perspective of the invention.

[0026] The terms "up and down reciprocating motion, upper end, lower end" and the like used in the description of the present invention are defined based on the drawings, and these terms do not limit the shape and position of each component.

[0027] According to an embodiment of the present invention, the transmission includes an input shaft 2 to which power is input from an external source, a planetary gear 4 to which a portion of the power is transmitted from the input shaft 2, a driven shaft 3 to which a portion of the power is transmitted from the input shaft 2, a first link shaft 51 which is rotated by the power transmitted from the driven shaft 3, a link actuator which operates by the rotation of the first link shaft 51, a speed change lever 6 which adjusts the speed change ratio of the link actuator, and an output shaft 7 to which power is transmitted from the link actuator and the planetary gear 4, and the link actuator drives the first link shaft 51 The continuously variable transmission includes an eccentric disk 501 that rotates eccentrically around its center, a cam 502 that moves up and down reciprocally due to the rotation of the eccentric disk 501, a first link 504 that is connected to the cam 502 and transmits power to an output shaft 7, and a one-way clutch 506 that is provided between the first link 504 and the output shaft 7 and transmits power only in one direction in which the output shaft 7 rotates.By rotating the first link shaft 51 using the driven shaft 3, the rotation direction of the first link shaft 51 and the rotation direction of the output shaft 7 are driven in the same direction.

[0028] According to the above-described structure, as shown in FIG. 5, the rotation direction of the first link shaft 51 and the rotation direction of the output shaft 7 are the same.

[0029] As a result, the point of action (especially the eccentric disk 501) in the process of transmitting power to the output shaft 7 via the first link shaft 51, eccentric disk 501, second link shaft adjusting shaft 62, second link shaft 52, first link 504, etc. is different from that in Korean Patent Registration No. 10-1241819, so noise, vibration, and impact are significantly reduced compared to conventional technology.

[0030] The input shaft 2, the speed change lever 6, the link actuator, etc. may have their central shafts (rotating shafts) fixed to the frame 1 by members such as bearings.

[0031] A portion of the power (gravitational force, engine / motor power, etc.) transmitted by the input shaft 2 can be transmitted to the output shaft 7 by the planetary gear 4, and energy can be transmitted to the location where power is required by components such as gears and sprockets 71 provided at the end of the output shaft 7.

[0032] The remaining portion of the power, excluding losses due to friction, etc., is transmitted to the link actuator via the driven shaft 3 and changes speed within a predetermined range.

[0033] The speed change lever 6 can adjust the gear ratio by adjusting the operating radius of the link actuator. In this case, the speed change lever 6 is not fastened to a specific gear but rotates based on the second link shaft adjusting shaft 62 (described later), which allows for infinitely variable speed change without any "gears."

[0034] The link actuator includes a plurality of link sets, each including the eccentric disk 501, the cam 502, the first link 504, and the one-way clutch 506. The link set includes a hinge portion 503 connected to one side of the cam 502, a second link 505 connected to extend from the hinge portion 503 at one end, and a second link shaft 52 connected to the other ends of the second links 505, the first link 504 having one end connected to the hinge portion 503 and the other end connected to the one-way clutch 506. This allows the position of the second link shaft 52 to be adjusted by the shift lever 6.

[0035] The more appropriate the number of link sets, the more effectively the shift shock can be minimized. The drawings show an embodiment with four link sets. In the case of a conventional configuration with three link sets, some shift shock occurs, and even when five or more link sets are provided, there are problems such as the continuously variable transmission becoming unstable and the structure becoming complicated, resulting in poor maintainability and durability.

[0036] In order to minimize the shifting shock, it is preferable that the eccentric disks 501 are fixed in an eccentric manner in different directions (at different positions) relative to the first link shaft 51, as shown in FIG. 5.

[0037] The rotation of the first link shaft 51 causes the eccentric disk 501 to rotate eccentrically, and the cam 502 (hinge portion 503) connected to the outside of the eccentrically rotating eccentric disk 501 in the form of a hinge / bearing moves up and down based on the first link shaft 51.

[0038] The one-way clutch 506 restricts the movement of the first link 504 so that only one direction of movement is transmitted to the planetary gear 4 (carrier 44).

[0039] In addition, the shift lever 6 may include a second link shaft adjusting unit 61 connected to both ends of the second link shaft 52, a second link shaft adjusting shaft 62 fixed at a position spaced a predetermined distance from the second link shaft 52, and an operating unit 63 extending from one side of the second link shaft adjusting shaft 62 in a direction perpendicular to the second link shaft adjusting shaft 62 and rotating within a predetermined angle range based on the second link shaft adjusting shaft 62.

[0040] When the end of the operating part 63 is positioned at the upper end, the second link shaft 52 is also fixed at the highest position relatively, so that the height of the bottom dead center of the hinge part 503 increases and the stroke length becomes shorter, and therefore the length / speed transmitted by the first link 504 to the one-way clutch becomes shorter, and it acts as a low-stage gear.

[0041] Conversely, when the end of the operating part 63 is positioned at the lower end, the second link shaft 52 is also fixed at the relatively lowest position, which reduces the height of the bottom dead center of the hinge part 503 and increases the stroke length, thereby increasing (increasing) the length / speed transmitted by the first link 504 to the one-way clutch, and thus acting as a high-stage gear.

[0042] The "perpendicular direction" in the "operating unit 63 extending from one side of the second link shaft adjusting shaft 62 in a direction perpendicular to the second link shaft adjusting shaft 62 and rotating within a predetermined angle range based on the second link shaft adjusting shaft 62" is not limited to "perpendicular" in the geometric sense, but also includes a configuration equivalent to a shape / structure that rotates the second link shaft adjusting shaft 62 with a relatively small force due to a predetermined moment force.

[0043] The "predetermined angle range" refers to the range of angles formed when connecting the point when the second link shaft 52 is at its uppermost position, the center point of the second link shaft adjustment shaft 62, and the point when the second link shaft 52 is at its lowermost position, and it is preferable that the angle range be formed in the range of 25 degrees to 50 degrees.

[0044] Furthermore, the planetary gear 4 includes a ring gear 41 that is circumscribed on the first driving gear 21 formed on the input shaft 2 and has teeth formed on its outer and inner peripheral surfaces, a plurality of satellite gears 42 that are inscribed in the ring gear 41, a sun gear 43 that is located at the center of the ring gear 41 and is circumscribed on the satellite gears 42, and a carrier 44 that is connected to the plurality of satellite gears 42, has a central axis that is concentric with the input shaft 2, and has a predetermined hollow formed so that the input shaft 2 passes through, so that the one-way clutch 506 transmits power to the carrier 44, and the one-way clutch 506 can be configured not to be directly connected to the output shaft 7.

[0045] The effects of the present invention can be achieved by organically combining the detailed configuration of the link actuator and the detailed configuration of the planetary gear 4.

[0046] Depending on the structure of the planetary gear 4, forces from two locations can generate a resultant force without interfering with each other. Part of the power of the input shaft 2 is transmitted via the outside of the ring gear 41, and the power transmitted from the link actuator is transmitted to the satellite gear 42 via the carrier 44, so the power is transmitted to the output shaft 7 without interfering with each other, generating a resultant force.

[0047] In addition, the input shaft 2 includes a first driving gear 21 that transmits power to the planetary gear 4, the driven shaft 3 includes a first driven gear 31 connected to the first driving gear 21 and having a gear ratio such that the driven shaft 3 is accelerated compared to the input shaft 2, a bearing 32 that supports the driven shaft 3 at a predetermined distance from the input shaft 2 so as to have a central axis parallel to the input shaft 2, and a second driving gear 33 that is formed to have a larger diameter than the first driven gear 31, and the first link shaft 51 includes a second driven gear 511 connected to the second driving gear 33 and having a gear ratio such that the first link shaft 51 is accelerated compared to the driven shaft 3.

[0048] As described above, by accelerating the power transmitted to the link actuator beforehand and transmitting it, the number of rotations input to the link actuator is greatly increased, thereby enabling stable gear changes.

[0049] FIG. 7 is a perspective view of a motor-integrated continuously variable transmission according to an embodiment of the present invention, and FIG. 8 is a front view of FIG.

[0050] Referring to FIGS. 7 and 8, the present invention is configured such that the power of the motor m or the input shaft 2 is selectively input to rotate the driven shaft 3.

[0051] That is, in the present invention, it is possible to input power from the motor m.

[0052] First, the rotational force of the motor m is transmitted to the motor shaft 12, reduced by a gear formed on the motor shaft and a reduction gear 14, and transmitted to the driven shaft 3 for rotation. At this time, a one-way clutch 16 is provided on the reduction gear 14, and the rotational force is transmitted to the driven shaft 3 while being rotatable in one direction.

[0053] On the other hand, the gear ratio of the driven shaft 3 is set so that the speed is reduced when the motor m is driven and increased when the input shaft 2 is driven.

[0054] In addition, the motor m and the input shaft 2 are configured to rotate in one direction each, so that the input shaft 2 does not operate when the motor m is driven, and the motor m does not operate when the input shaft 2 is operating, thereby preventing mutual interference and preventing loads caused by mutual operation. [Explanation of symbols]

[0055] 1 frame 2 input shafts 21 First driving gear 3 Driven axis 31 First driven gear 32 Bearings 33 Second driving gear 4 Planetary Gears 41 Ring Gear 42 Satellite Gear 43 Sun Gear 44 Career 501 Eccentric disc 502 Cam 503 Hinge part 504 First Link 505 Second Link 506 One-way clutch 51 First link shaft 511 Second driven gear 52 Second link shaft 6 Gear shift lever 61 Second link shaft adjustment part 62 Second link shaft adjustment shaft 63 Operation section 7 Output shaft 71 sprocket m motor 12 Motor shaft 14 Reduction gear 16 One-way clutch

Claims

1. an input shaft to which power is input from an external source; a planetary gear to which a portion of power is transmitted from the input shaft; a driven shaft to which a portion of power is transmitted from the input shaft; a first link shaft that rotates by power transmitted from the driven shaft; a link actuator that operates in response to rotation of the first link shaft; a speed change lever for adjusting the speed change ratio of the link actuator; an output shaft to which power is transmitted from the link actuator and the planetary gear, The link actuator is an eccentric disk that rotates eccentrically around the first link shaft; a cam that reciprocates up and down due to the rotation of the eccentric disk; a first link connected to the cam and transmitting power to the output shaft; a one-way clutch provided between the first link and the output shaft, which transmits power only in one direction in which the output shaft rotates, By rotating the first link shaft by the driven shaft, the rotation direction of the first link shaft and the rotation direction of the output shaft are driven in the same direction, The driven shaft has a motor shaft driven by a motor; a reduction gear that is reduced in speed by the drive shaft and transmits power to the driven shaft; a one-way clutch attached to the reduction gear and rotating in one direction, A motor-integrated continuously variable transmission in which power is input via the input shaft or the motor shaft in a hybrid system.

2. the link actuator includes a plurality of link sets, each including the eccentric disk, the cam, the first link, and the one-way clutch; The link set includes: a hinge portion connected to one side of the cam; a second link connected so that one end thereof extends from the hinge portion; one end of the first link is connected to the hinge portion, the other end of the first link is connected to the one-way clutch, and a second link shaft is connected to the other ends of the plurality of second links, 2. The motor-integrated continuously variable transmission according to claim 1, wherein the position of said second link shaft is adjusted by said speed change lever.

3. The gear shift lever is second link shaft adjustment units connected to both ends of the second link shaft; a second link shaft adjusting shaft fixed at a position spaced a predetermined distance from the second link shaft; 3. The motor-integrated continuously variable transmission according to claim 2, further comprising: an operating unit extending from one side of the second link shaft adjusting shaft in a direction perpendicular to the second link shaft adjusting shaft and rotatable within a predetermined angle range with the second link shaft adjusting shaft as a reference.

4. The planetary gear is a ring gear circumscribing the first drive gear formed on the input shaft and having teeth formed on its outer and inner peripheral surfaces; a plurality of satellite gears inscribed in the ring gear; a sun gear located at the center of the ring gear and circumscribing the satellite gears; a carrier connected to the plurality of satellite gears, having a central axis concentric with the input shaft, and having a predetermined hollow formed so that the input shaft passes through, 2. The motor-integrated continuously variable transmission according to claim 1, wherein the one-way clutch transmits power to a carrier, and the one-way clutch is configured not to be directly connected to an output shaft.

5. The input shaft a first driving gear that transmits power to the planetary gears; The driven shaft is a first driven gear connected to the first driving gear and having a gear ratio such that the driven shaft is accelerated relative to the input shaft; a bearing supporting a driven shaft at a predetermined distance from the input shaft so as to have a central axis parallel to the input shaft; a second driving gear formed to have a larger diameter than the first driven gear, The first link shaft 2. The motor-integrated continuously variable transmission according to claim 1, further comprising a second driven gear connected to the second driving gear, the second driven gear having a gear ratio such that the first link shaft is accelerated relative to the driven shaft.

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