Motor-integrated continuously variable transmission

Abstract

The invention provides a motor-integrated continuously variable transmission including: an input shaft that receives power from the outside; a planetary gear receiving a portion of power from the input shaft; a driven shaft receiving a part of power from the input shaft; a first link shaft that receives power from the driven shaft and rotates; a link actuator that operates by means of the rotation of the first link shaft; the gear shift lever is used for adjusting the gear ratio of the connecting rod executing mechanism; the output shaft receives power from the connecting rod executing mechanism and the planetary gear; the connecting rod executing mechanism comprises an eccentric disc which eccentrically rotates by taking the first connecting rod shaft as the center; a cam that reciprocates up and down by means of the rotation of the eccentric disc; a first link that transmits power to an output shaft by being connected to the cam; and a one-way clutch disposed between the first link and the output shaft and transmitting power only in a direction in which the output shaft rotates in one direction. The present invention relates to a driving device for a vehicle, comprising: a driven shaft that rotates a first link and drives the first link in the same rotation direction as an output shaft, the driven shaft further comprising: a motor shaft that is driven by means of a motor; the reduction gear is used for receiving the power of the motor shaft, reducing the speed and transmitting the power to the driven shaft; a one-way clutch attached to the reduction gear and rotating in a single direction; power is received in a hybrid manner through the input shaft or the motor shaft.

Description

Technical Field

[0001] The present invention relates to an integrated motor continuously variable transmission, and more particularly to an integrated motor continuously variable transmission that can receive power input by rotating with external power or the power of a motor. Background Art

[0002] Continuously variable transmissions can be applied to many devices that utilize rotational power, such as bicycles, automobiles, motorcycles, and other transportation means.

[0003] In recent years, in order to maximize the efficiency of engines or motors, etc., the demand related to continuously variable transmissions is increasing day by day.

[0004] The applicant of the present invention proposed Korean Registered Patent No. 10-1241819 in order to constitute a continuously variable transmission, and a continuously variable transmission that can rotate forward and reverse is disclosed in the said patent document.

[0005] When constituting a continuously variable transmission according to the said patent document, as shown in the said patent document Figure 2 The rotation directions of the input gear 310 and the output shaft 400 are configured in opposite directions to each other. In the above situation, although forward rotation and reverse rotation can be achieved, a large amount of noise, vibration, and shock are generated, so there are limitations when applied to actual products, and the reasons for the occurrence of the above-mentioned noise, vibration, and shock cannot be identified. Summary of the Invention

[0006] Technical Problem to be Solved

[0007] Through long-term research and development, the applicant of the present invention confirmed that the reason for the occurrence of noise, vibration, and shock in the continuously variable transmission according to the said patent document lies in the rotation in the opposite direction, and accordingly provides an integrated motor continuously variable transmission that can significantly reduce noise, vibration, and shock by making the rotation direction of the input gear (the second driven gear, the eccentric disk 501, or the first link shaft 51 in the present invention) the same as the rotation direction of the output shaft 7.

[0008] The problem to be solved by the present invention is to provide an integrated motor continuously variable transmission with a structure that significantly reduces noise, vibration, and shock in order to improve the limitations of the existing continuously variable transmission as described above.

[0009] In addition, the object of the present invention is also to provide an integrated motor continuously variable transmission that can also receive rotational input through a motor and rotate, thereby utilizing the power of the motor.

[0010] Means for Solving the Problem

[0011] The present invention provides an integrated motor continuously variable transmission in order to improve the limitations of the existing continuously variable transmission as described above, including: an input shaft that receives power from the outside; a planetary gear that receives a part of the power from the input shaft; a driven shaft that receives a part of the power from the input shaft; a first link shaft that receives power from the driven shaft and rotates; a link actuator that operates by the rotation of the first link shaft; a shift lever that adjusts the transmission ratio of the link actuator; and an output shaft that receives power from the link actuator and the planetary gear; the link actuator includes: an eccentric disk that eccentrically rotates around the first link shaft; a cam that reciprocates up and down by the rotation of the eccentric disk; a first link that transmits power to the output shaft by being connected to the cam; and a one-way clutch that is disposed between the first link and the output shaft and transmits power only in the direction that makes the output shaft rotate in a certain direction; the first link is rotated by the driven shaft so as to be driven in such a way that the rotation direction of the first link is the same as the rotation direction of the output shaft, and the driven shaft further includes: a motor shaft that is driven by a motor; a reduction gear that receives the power of the motor shaft, reduces the speed, and transmits the power to the driven shaft; a one-way clutch that is installed on the reduction gear and rotates in one direction; power is received in a hybrid manner through the input shaft or the motor shaft.

[0012] In addition, the link actuator may include: a plurality of link groups including the eccentric disk, the cam, the first link, and the one-way clutch; the link group may include: a hinge portion that is connected to one side of the cam; and a second link that is connected in such a way that one end 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 the link group may further include: a second link shaft that is connected to the other ends of the plurality of second links; thereby, the position of the second link shaft can be adjusted by the shift lever.

[0013] In addition, the shift lever may include: a second link shaft adjustment portion that is connected to both ends of the second link shaft; a second link shaft adjustment shaft that is fixed at a position separated from the second link shaft by a predetermined distance; and an operation portion that extends from one side of the second link shaft adjustment shaft in a direction perpendicular to the second link shaft adjustment shaft and rotates within a predetermined angle range with respect to the second link shaft adjustment shaft.

[0014] In addition, the planetary gear may include: an annular gear externally engaged with a first driving gear formed on the input shaft, having gear teeth formed on an outer circumferential surface and an inner circumferential surface; a plurality of satellite gears internally engaged with the annular gear; a sun gear located at the center of the annular gear and externally engaged with the satellite gears, to which the output shaft can be connected; and a planet carrier connected to the plurality of satellite gears, having a central axis concentric with the output shaft, and formed with a predetermined central hole through which the output shaft can pass; the one-way clutch can transmit power to the planet carrier, and the one-way clutch can be configured in a manner not directly connected to the output shaft.

[0015] In addition, the input shaft may include: a first driving gear that transmits power to the planetary gear; the driven shaft may include: a first driven gear connected to the first driving gear, formed with a gear ratio such that the rotational speed of the driven shaft is accelerated compared to the input shaft; a bearing that supports the driven shaft at a predetermined distance from the input shaft with a central axis parallel to the input shaft; and a second driving gear formed with a diameter larger than that of the first driven gear; the first link shaft may include: a second driven gear connected to the second driving gear, formed with a gear ratio such that the rotational speed of the first link shaft is accelerated compared to the driven shaft.

[0016] Advantages of the Invention

[0017] According to an embodiment of the present invention, it can be configured such that the rotational direction of the second driven gear, the eccentric disk 501, or the first link shaft 51 is the same as the rotational direction of the output shaft 7, thereby significantly reducing noise, vibration, and shock.

[0018] In addition, due to the characteristics of the link actuator, in order to eliminate the problem that the speed change becomes unstable at low input rotational speeds, the rotational speed transmitted to the link actuator can be increased by providing a predetermined multi-stage speed change gear, thereby improving the stability of the speed change.

[0019] In addition, interference between components can be prevented by arranging the pivot point (second link shaft adjustment shaft 62) for adjusting the speed change ratio of the link actuator outside the link actuator.

[0020] Furthermore, it is configured as a hybrid type that can be rotated by external power or the power of a motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is an oblique view of a continuously variable transmission according to an embodiment of the present invention.

[0022] Figures 2 to 4 is an oblique view of the continuously variable transmission according to an embodiment of the present invention with the frame removed.

[0023] Figure 5 It is a schematic diagram illustrating the speed change process of a continuously variable transmission according to an embodiment of the present invention.

[0024] Figure 6 It is an exploded perspective view of a planetary gear applicable to a continuously variable transmission according to an embodiment of the present invention.

[0025] Figure 7 It is a perspective view of an electric motor integrated continuously variable transmission according to an embodiment of the present invention.

[0026] Figure 8 It is Figure 7 front view. Detailed Description

[0027] Next, various embodiments of this document will be described with reference to the accompanying drawings. However, this is not to limit the technology described in this document to specific embodiments, but should be understood to also include various modifications, equivalents, and / or alternatives of the embodiments of this document. In the description related to the drawings, similar reference numerals may be used for similar components.

[0028] In this document, expressions such as "having", "may have", "including", or "may include" indicate the existence of corresponding features (for example, elements such as numbers, functions, actions, or components), but do not exclude the existence of additional features.

[0029] In this document, expressions such as "A or B", "at least one of A or / and B", or "more than one of A or / and B" may include all possible combinations of the items listed simultaneously. For example, "A or B", "at least one of A and B", or "at least one of A or B" may mean (1) including at least one A, (2) including at least one B, or (3) including at least one A and at least one B.

[0030] Expressions such as "first", "second", "first one", or "second one" used in this document may modify various components regardless of order and / or importance, and are only used to distinguish one component from other components, and do not limit the corresponding components. For example, the first user device and the second user device may represent different user devices regardless of order or importance. For example, without departing from the scope of the rights described in this document, the first component may be named the second component, and similarly, the second component may also be named the first component.

[0031] When it is described that a certain component (e.g., the first component) is "(operatively or communicatively) coupled with / to" another component (e.g., the second component), it should be understood that the certain component can be directly coupled with the other component or can be coupled through other components (e.g., the third component). On the contrary, when it is described that a certain component (e.g., the first component) is "directly coupled" with another component (e.g., the second component), it should be understood that there is no other component (e.g., the third component) between the certain component and the other component.

[0032] The terms used in this document are only used to illustrate specific embodiments and are not intended to limit the scope of other embodiments. Unless there is a clear contrary meaning in the context, a singular statement can also include a plural meaning. The meanings of the terms used herein, including technical and scientific terms, can be the same as those generally understood by a person with ordinary knowledge in the technical field described in this document. Among the terms used in this document, terms that are generally defined in a dictionary can be interpreted as having the same or similar meanings in the context of the related art, and unless clearly defined in this document, they should not be interpreted as overly idealized or exaggerated meanings. In some cases, even terms defined in this document should not be interpreted as excluding the embodiments of this document.

[0033] Without departing from the gist of the present invention claimed in the claims of the present invention, a person with ordinary knowledge in the technical field to which the present invention pertains can make various modified implementations, and these modified implementations should not be understood separately from the technical idea or prospect of the present invention.

[0034] The terms "vertical reciprocating motion, upper end, lower end", etc. used in the description of the present invention are defined based on the drawings, and the shapes and positions of each component are not limited by these terms.

[0035] According to an embodiment of the present invention, a continuously variable transmission is provided, including: an input shaft 2 that receives power from the outside; a planetary gear 4 that receives a part of the power from the input shaft 2; a driven shaft 3 that receives a part of the power from the input shaft 2; a first link shaft 51 that receives power from the driven shaft 3 and rotates; a link actuator that operates by the rotation of the first link shaft 51; a shift lever 6 that adjusts the transmission ratio of the link actuator; and an output shaft 7 that receives power from the link actuator and the planetary gear 4. The link actuator includes: an eccentric disk 501 that eccentrically rotates around the first link shaft 51; a cam 502 that reciprocates up and down by the rotation of the eccentric disk 501; a first link 504 that transmits power to the output shaft 7 by being connected to the cam 502; and a one-way clutch 506 that is disposed between the first link 504 and the output shaft 7, indirectly connected to the output shaft through a bearing, and transmits power only in a direction that causes the output shaft 7 to rotate in a certain direction. The first link 51 is rotated by the driven shaft 3, so as to be driven in such a manner that the rotation direction of the first link 51 is the same as the rotation direction of the output shaft 7.

[0036] According to the structure described above, as Figure 5 shown, the rotation direction of the first link shaft 51 is the same as the rotation direction of the output shaft 7.

[0037] Thereby, the acting point (especially the eccentric disk 501) in the process of transmitting power to the output shaft 7 by means of the first link shaft 51, the eccentric disk 501, the second link shaft adjusting shaft 62, the second link shaft 52, the first link 504, etc. is different from that of Korean Registered Patent No. 10-1241819. Therefore, compared with the prior art, noise, vibration, and shock can be significantly reduced.

[0038] The input shaft 2, the shift lever 6, the link actuator, etc. can be fixed to the frame 1 through components such as bearings with a central shaft (rotating shaft), etc.

[0039] A part of the power (traction force, power of an engine / motor, etc.) transmitted through the input shaft 2 can be transmitted to the output shaft 7 through the planetary gear 4, and energy can be transmitted to a position that requires power through components such as gears and sprockets 71 formed at the end of the output shaft 7.

[0040] The remaining part of the power except for the loss caused by friction, etc. will be transmitted to the link actuator through the driven shaft 3 and be variable within a predetermined range.

[0041] The shift lever 6 can adjust the transmission ratio by adjusting the working radius of the link actuator. At this time, the shift lever 6 is not in a form combined with a specific gear position, but rotates based on the second link shaft adjustment shaft 62 described later, so that stepless speed change without "gear positions" can be achieved.

[0042] In addition, the link actuator may include: a plurality of link groups including the eccentric disk 501, the cam 502, the first link 504, and the one-way clutch 506; the link group may include: a hinge portion 503 connected to one side of the cam 502; and a second link 505 connected in such a way that one end extends from the hinge portion 503; one end of the first link 504 may be connected to the hinge portion 503, the other end of the first link 504 may be connected to the one-way clutch 506, and the link group may further include: a second link shaft 52 connected to the other ends of the plurality of second links 505; thus, the position of the second link shaft 52 can be adjusted by means of the shift lever 6.

[0043] The more appropriate the number of the link groups is, the more the shift shock can be minimized. In the drawings, an embodiment equipped with 4 link groups is illustrated. In the case of the existing form equipped with 3 link groups, a part of the shift shock occurs.

[0044] To minimize the shift shock, the eccentric disk 501 is preferably fixedly coupled in a state of being eccentric in different directions (at different positions) with respect to the first link shaft 51 as shown. Figure 5 When the first link shaft 51 rotates, the eccentric disk 501 will eccentrically rotate, and the cam 502 (hinge portion 503) connected to the outside of the eccentrically rotating eccentric disk 501 in a hinge / bearing form will reciprocate up and down with respect to the first link shaft 51.

[0045] The one-way clutch 506 restricts the first link 504 from transmitting the motion in only one direction to the planetary gear 4 (planet carrier 44) during the movement of the first link 504.

[0046]

[0047] In addition, the shift lever 6 may include: a second link shaft adjustment portion 61 connected to both ends of the second link shaft 52; a second link shaft adjustment shaft 62 fixed at a position spaced a predetermined distance from the second link shaft 52; and an operation portion 63 extending from one side of the second link shaft adjustment shaft 62 in a direction perpendicular to the second link shaft adjustment shaft 62 and rotating within a predetermined angle range with respect to the second link shaft adjustment shaft 62.

[0048] ​When the end of the operation unit 63 is at the upper end, the second link shaft 52 is also fixed at the highest position relatively. Therefore, the lower dead point height of the hinge unit 503 will become higher and the stroke length will become shorter. As a result, the length / speed of the first link 504 transmitting to the one-way clutch will also become shorter, thus functioning as a low gear.

[0049] On the contrary, when the end of the operation unit 63 is at the lower end, the second link shaft 52 is also fixed at the lowest position relatively. Therefore, the lower dead point height of the hinge unit 503 will become lower and the stroke length will become longer. As a result, the length / speed of the first link 504 transmitting to the one-way clutch will also become longer (higher), thus functioning as a high gear.

[0050] In the "operation unit 63 that extends from one side of the second link shaft adjustment shaft 62 in a direction perpendicular to the second link shaft adjustment shaft 62 and rotates within a predetermined angle range with the second link shaft adjustment shaft 62 as a reference", the "perpendicular direction" is not limited to the "perpendicular" in the geometric sense, but includes configurations that are equal in shape / structure to those that can rotate the second link shaft adjustment shaft 62 with a relatively small force by means of a predetermined torque.

[0051] The "predetermined angle range" refers to the angle range formed when connecting the point when the second link shaft 52 is at the uppermost side, the center point of the second link shaft adjustment shaft 62, and the point when the second link shaft 52 is at the lowermost side. The angle range is preferably formed within the range of 25 degrees to 50 degrees.

[0052] In addition, the planetary gear 4 may include: an annular gear 41, externally engaged with the auxiliary gear 22 formed on the input shaft 2, and having gear teeth formed on the outer peripheral surface and the inner peripheral surface; a plurality of satellite gears 42, internally engaged with the annular gear 41; a sun gear 43, located at the center of the annular gear 41 and externally engaged with the satellite gears 42, for connecting the output shaft 7; and a planet carrier 44, connected to the plurality of satellite gears 42, having a central axis concentric with the output shaft 7, and formed with a predetermined central hole through which the output shaft 7 can pass through; the one-way clutch 506 can transmit power to the planet carrier 44, and the one-way clutch 506 can be configured in a manner that does not directly connect to the output shaft 7.

[0053] The effects of the present invention can be achieved by organically combining the detailed configurations of the link actuator and the detailed configurations of the planetary gear 4.

[0054] Through the structure of the planetary gear 4, the power from two positions can be made non-interfering with each other and generate a resultant force. Since a part of the power of the input shaft 2 is transmitted through the outer side of the ring gear 41, and the power transmitted from the link actuator is transmitted to the planetary gear 42 through the planet carrier 44, the power can be transmitted to the output shaft 7 without interference and generate a resultant force. Since the output shaft 7 is connected to the sun gear 43 of the planetary gear 4, finally, the power from the link actuator transmitted to the planetary gear 42 can be received through the planet carrier 44.

[0055] In addition, the input shaft 2 may include: a first driving gear 21 that transmits power to the planetary gear 4; the driven shaft 3 may include: a first driven gear 31 connected to the first driving gear 21 to form a gear ratio in such a way that the driven shaft 3 is accelerated compared with the input shaft 2; a bearing 32 that supports the driven shaft 3 at a predetermined distance from the input shaft 2 with a central axis parallel to the input shaft 2; and a second driving gear 33 formed to have a diameter larger than that of the first driven gear 31; the first link shaft 51 may include: a second driven gear 511 connected to the second driving gear 33 to form a gear ratio in such a way that the first link shaft 51 is accelerated compared with the driven shaft 3.

[0056] By accelerating the power transmitted to the link actuator in the above-described manner in advance and then transmitting it, the number of revolutions input to the link actuator can be significantly increased, thereby achieving stable speed change.

[0057] Figure 7 is a perspective view of the motor-integrated continuously variable transmission according to an embodiment of the present invention, and Figure 8 is Figure 7 front view.

[0058] Refer to Figure 7 and Figure 8 In the present invention, it is configured to selectively receive power from the motor m or the input shaft 2 and rotate the driven shaft 3.

[0059] That is, in the present invention, input can be received from the motor m as a power source.

[0060] First, the rotational force of the motor m is connected to the motor shaft 12, decelerated by the gear formed on the motor shaft and the reduction gear 14, and then connected to the driven shaft 3 to rotate it. At this time, a one-way clutch 16 is formed on the reduction gear 14, so that it is transmitted to the driven shaft 3 in a way that it can rotate in one direction.

[0061] In addition, the driven shaft 3 is configured to form a gear ratio such that it decelerates when driven by the motor m and accelerates in advance when driven by the input shaft 2.

[0062] In addition, one-way clutches are respectively formed on the motor m and the input shaft 2 so as to be rotatable in one direction, so that when driven by the motor m, it will not be transmitted to the input shaft 2, and when the input shaft 2 works, it will not be transmitted to the motor m, thereby preventing mutual interference and thus preventing the load caused by the interaction.

[0063] *Description of Reference Numerals

[0064] 1: Frame

[0065] 2: Input shaft

[0066] 21: First driving gear

[0067] 22: Auxiliary gear

[0068] 3: Driven shaft

[0069] 31: First driven gear

[0070] 32: Bearing

[0071] 33: Second driving gear

[0072] 4: Planetary gear

[0073] 41: Annular gear

[0074] 42: Satellite gear

[0075] 43: Sun gear

[0076] 44: Planet carrier

[0077] 501: Eccentric disk

[0078] 502: Cam

[0079] 503: Hinge part

[0080] 504: First connecting rod

[0081] 505: Second connecting rod

[0082] 506: One-way clutch

[0083] 51: First connecting rod shaft

[0084] 511: Second driven gear

[0085] 52: Second connecting rod shaft

[0086] 6: Shift lever

[0087] 61: Second connecting rod shaft adjusting part

[0088] 62: Second connecting rod shaft adjusting shaft

[0089] 63: Operating unit

[0090] 7: Output shaft

[0091] 71: Sprocket wheel

[0092] 72: Bearing

[0093] m: Motor

[0094] 12: Motor shaft

[0095] 14: Reduction gear

[0096] 16: One-way clutch

Claims

1. An integrated motor continuously variable transmission, comprising: An input shaft for receiving power from the outside; A planetary gear for receiving a part of the power from the input shaft; A driven shaft for receiving a part of the power from the input shaft; A first link shaft for receiving power from the driven shaft and rotating; A link actuator for operating by means of the rotation of the first link shaft; A shift lever for adjusting the transmission ratio of the link actuator; And An output shaft for receiving power from the link actuator and the planetary gear; The link actuator includes: A plurality of eccentric disks that rotate eccentrically around the first link shaft and are fixedly coupled in a state of being eccentric in different positions and in different directions with respect to the first link shaft; A cam that reciprocates up and down by means of the rotation of the eccentric disk; A first link for transmitting power to the output shaft by connecting to the cam; and A one-way clutch disposed between the first link and the output shaft, indirectly connected to the output shaft through a bearing, and transmitting power only in a direction that causes the output shaft to rotate in a certain direction; The first link is rotated by the driven shaft, so as to be driven in such a manner that the rotation direction of the first link is the same as the rotation direction of the output shaft. The driven shaft further includes: a motor shaft driven by a motor; A reduction gear for receiving the power of the motor shaft, reducing the speed, and transmitting the power to the driven shaft; A one-way clutch installed on the reduction gear and rotating in one direction; Power is received in a hybrid manner through the input shaft or the motor shaft.

2. The integrated motor continuously variable transmission according to claim 1, The link actuator includes: A plurality of link groups including the eccentric disk, the cam, the first link, and the one-way clutch; The link group includes: A hinge portion connected to one side of the cam; and A second link connected in such a manner that one end 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, The link group further includes: A second link shaft connected to the other ends of the plurality of second links; Thereby, the position of the second link shaft is adjusted by means of the shift lever.

3. The integrated motor continuously variable transmission according to claim 2, The shift lever includes: A second link shaft adjustment portion connected to both ends of the second link shaft; A second link shaft adjustment shaft fixed at a position separated from the second link shaft by a predetermined distance; And An operation portion extending from one side of the second link shaft adjustment shaft in a direction perpendicular to the second link shaft adjustment shaft and rotating within a predetermined angle range with respect to the second link shaft adjustment shaft.

4. The integrated motor continuously variable transmission according to claim 1, The planetary gear includes: An annular gear externally engaged with an auxiliary gear formed on the input shaft, and having gear teeth formed on its outer peripheral surface and inner peripheral surface; A plurality of satellite gears internally engaged with the annular gear; A sun gear located at the center of the annular gear and externally engaged with the satellite gears, and connectable to the output shaft; And The planet carrier, which is connected to a plurality of the satellite gears, has a central axis concentric with the output shaft and is formed with a predetermined central hole through which the output shaft can pass through; The one-way clutch transmits power to the planet carrier, and the one-way clutch is configured in a manner that it is not directly connected to the output shaft.

5. The motor-integrated continuously variable transmission according to claim 1, The input shaft includes: A first driving gear that transmits power to the planet gear; The driven shaft includes: A first driven gear that is connected to the first driving gear and is formed with a gear ratio such that the rotational speed of the driven shaft is higher than that of the input shaft; A bearing that supports the driven shaft at a predetermined distance from the input shaft with a central axis parallel to the input shaft; and A second driving gear that is formed with a diameter larger than that of the first driven gear; The first link shaft includes: A second driven gear that is connected to the second driving gear and is formed with a gear ratio such that the rotational speed of the first link shaft is higher than that of the driven shaft.

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