Power transmission device

Abstract

Disclosed is a power transmission device with a simple structure and a compact size. A power transmission device according to an aspect of the present invention comprises: a driving disc having a plurality of arc-shaped teeth formed on one surface thereof; a plurality of first driving pinions engaged with the plurality of arc-shaped teeth; a first variable rotary shaft which has an outer surface into which the plurality of first driving pinions are inserted, and is rotated while being constrained by one of the plurality of first driving pinions; and a constraint release means causing the first variable rotary shaft to be engaged with or released from one of the plurality of first driving pinions.

Description

Power transmission system

[0001] The present invention relates to a power transmission device, and more specifically, to a power transmission device capable of a simple structure and a compact size.

[0002] Generally, a transmission is a device that receives power from a driving power source, converts it to a rotational speed suitable for driving conditions, and transmits it to the output shaft. These transmissions include manual transmissions, which enable the driver to select the desired gear ratio through the operation of a shift lever, and automatic transmissions, which automatically select gear ratios based on vehicle speed and the degree of throttle valve opening.

[0003] Manual transmissions have the advantage of good fuel efficiency but the disadvantage of being difficult to operate, while automatic transmissions are easy to operate but have the disadvantage of lower fuel efficiency.

[0004] As the number of gear ratios implemented by the transmission increases, the fuel efficiency of the vehicle improves. However, an automatic transmission includes multiple planetary gear sets and friction elements that operate the respective operating means of the multiple planetary gear sets, and as the number of gear ratios implemented increases, the number of planetary gear sets and friction elements used in the automatic transmission also increases.

[0005] In addition, as the number of planetary gear sets and friction elements increases, the weight of the automatic transmission increases, which leads to a decrease in fuel efficiency. Therefore, in the case of automatic transmissions, the number of gear ratios implemented is typically fewer than that of manual transmissions.

[0006] Currently, as is well known, development and research are continuously underway for conventional transmissions to achieve various gear ratios, rapid and smooth shifting, and maximum torque.

[0007] However, power transmission devices based on conventional technology, such as transmissions, include torque converters, friction clutches, and planetary gear sets to transmit the output of an engine or electric motor to the wheels with maximum efficiency and power through shifting, and although there are various types thereof, there was a problem in that they were very complex and occupied a large amount of space due to the inclusion of all these components.

[0008] The present invention aims to solve the aforementioned problems, and the objective of the present invention is to provide a power transmission device that can replace existing transmissions with a small size and simple structure by connecting a single drive disk and a planetary gear set.

[0009] The problems of the present invention are not limited to those mentioned above, and other unmentioned problems will be clearly understood by a person skilled in the art to which the present invention pertains from the description below.

[0010] According to one aspect of the present invention, a power transmission device is provided comprising: a driving unit; a driving disk having a plurality of arc-shaped teeth formed on one surface that engage with the driving unit; a plurality of first driving pinions engaged with the plurality of arc-shaped teeth; a first variable rotation shaft in which the plurality of first driving pinions are inserted on an outer surface and which rotates while being constrained to one of the plurality of first driving pinions; and a release means for engaging or releasing the first variable rotation shaft with any one of the plurality of first driving pinions.

[0011] At this time, a plurality of arc-shaped teeth are formed on the opposite side of the driving disk, and a plurality of second driving pinions that engage with the plurality of arc-shaped teeth formed on the opposite side; a second variable rotation shaft that is inserted into the outer surface of the plurality of second driving pinions and rotates while being constrained to one of the plurality of second driving pinions; and a release means for engaging or releasing the second variable rotation shaft with one of the plurality of second driving pinions.

[0012] At this time, the release means may be a restraint key that is inserted and discharged between the first variable rotation axis and the plurality of first driving pinions.

[0013] At this time, one of the plurality of arc-shaped teeth may be formed with a different height.

[0014] It may include a reverse pinion that rotates the first variable rotation axis in the opposite direction by engaging with a tooth profile formed at a different height among the plurality of arc-shaped teeth and simultaneously engaging with one of the plurality of first driving pinions.

[0015] At this time, the plurality of first driving pinions may have the same size and tooth profile.

[0016] At this time, the above drive unit may be any one selected from an engine, an electric motor, a pedal, wind power, or water power.

[0017] At this time, it may include a planetary gear set connected to the first variable rotation shaft to change the rotational driving force of the first variable rotation shaft.

[0018] At this time, the planetary gear set may include: a carrier to which the first variable rotation shaft is connected to receive rotational force; a plurality of planetary pinions inserted into the outer surfaces of rotation shafts arranged along the circumferential direction of the carrier; a sun gear arranged coaxially with the carrier and meshing with the plurality of planetary pinions, to which the first output shaft is connected to output a shifted output; and a ring gear meshing with the outer side of the plurality of planetary pinions.

[0019] At this time, it may include a plurality of output pinions each meshing with the inner side of the ring gear; and a plurality of second output shafts each forming the rotation axis of the plurality of output pinions.

[0020] At this time, it may include a plurality of distribution pinions engaged with the first output shaft; and a plurality of distribution output shafts each constituting the rotational axes of the plurality of distribution pinions.

[0021] At this time, it may include a planetary gear set connected to the first variable rotation shaft to change the rotational driving force of the first variable rotation shaft; and a ring gear driving pinion provided on the second variable rotation shaft and meshing with the inner side of the ring gear of the planetary gear set to transmit the rotational force of the second variable rotation shaft to the ring gear.

[0022] At this time, a third output shaft may be included to output the rotational force of the ring gear through a pinion engaged with the outer surface of the ring gear.

[0023] At this time, the gear provided on the first variable rotation shaft and the gear provided on the carrier mesh with each other, thereby changing the rotation of the first variable rotation shaft and transmitting it to the carrier, making four-wheel drive possible.

[0024] At this time, it may include a drive gear that engages with a pair of drive discs and transmits driving force from the drive unit to the pair of drive discs.

[0025] At this time, the driving disk may be provided with a plurality of the first variable rotation axes.

[0026] At this time, a bevel gear set connecting the first variable rotation axis and the carrier may be included.

[0027] At this time, a pair of the carriers can be connected through the bevel gear set.

[0028] At this time, the side of the above-mentioned driving disk may be provided with a tooth profile to enable driving from the side.

[0029] At this time, a gear for regenerative braking can be engaged with the above-mentioned drive disc.

[0030] At this time, the plurality of arc-shaped teeth may be formed with different sizes.

[0031] According to the above configuration, the power transmission device according to one aspect of the present invention drives the drive disc and transmits the driving force to the planetary gear set in a state where the gear shift has already been performed on the drive disc, so the overall size of the transmission device can be reduced.

[0032] According to another aspect of the present invention, since the power transmission device can appropriately distribute the driving force, smooth operation is possible not only in internal combustion engines but also in cases such as electric vehicles or drones that drive individual wheels.

[0033] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description or claims of the present invention.

[0034] FIG. 1 is a perspective view of a power transmission device according to a first embodiment of the present invention.

[0035] FIG. 2 is an enlarged view of the first driving pinion portion of a power transmission device according to the first embodiment of the present invention.

[0036] FIG. 3 is a front view of a power transmission device according to a first embodiment of the present invention.

[0037] FIG. 4 is a perspective view showing the connection between a first driving pinion and a planetary gear set, which are some components of a power transmission device according to a first embodiment of the present invention.

[0038] FIG. 5 is a rear view of a planetary gear set, which is a component of a power transmission device according to the first embodiment of the present invention.

[0039] FIG. 6 is a front view of a power transmission device according to a second embodiment of the present invention.

[0040] FIG. 7 is a perspective view showing the connection between the first driving pinion and the planetary gear set of a power transmission device according to a second embodiment of the present invention.

[0041] FIG. 8 is a front view of a power transmission device according to a third embodiment of the present invention.

[0042] FIG. 9 is a perspective view of a power transmission device according to a fourth embodiment of the present invention.

[0043] FIG. 10 is a perspective view of a power transmission device according to the fifth embodiment of the present invention.

[0044] FIG. 11 is a perspective view of a power transmission device according to the 6th embodiment of the present invention.

[0045] Hereinafter, embodiments of the present invention are described in detail with reference to the attached drawings so that those skilled in the art can easily implement the invention. The present invention may be embodied in various different forms and is not limited to the embodiments described herein. To clearly explain the present invention, parts unrelated to the description in the drawings have been omitted, and the same reference numerals have been used throughout the specification for identical or similar components.

[0046] The words and terms used in this specification and claims are not limited to their ordinary or dictionary meanings, but should be interpreted in a meaning and concept consistent with the technical spirit of the invention in accordance with the principles by which the inventor defines terms and concepts to best describe his invention.

[0047] Therefore, the embodiments described in this specification and the configurations illustrated in the drawings correspond to preferred embodiments of the present invention and do not represent all technical concepts of the present invention; thus, various equivalents and modifications that may replace such configurations may exist at the time of filing the present invention.

[0048] In this specification, terms such as “comprising” or “having” are intended to describe the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should not be understood as precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0049] The statement that a component is "in front," "rear," "upper," or "lower" of another component includes, unless there are special circumstances, not only being positioned "in front," "rear," "upper," or "lower" in direct contact with the other component, but also cases where another component is positioned in between. Furthermore, the statement that a component is "connected" to another component includes, unless there are special circumstances, not only being directly connected to each other, but also being indirectly connected to each other.

[0050] Hereinafter, a power transmission device (1) according to an embodiment of the present invention is described with reference to the drawings.

[0051] A power transmission device (1) according to the first embodiment of the present invention may include a driving unit (10), a driving disk (20), a plurality of first driving pinions (31, 32, 33), a plurality of second driving pinions (41, 42, 43), a first variable rotation shaft (35), a second variable rotation shaft (45), a restraint release means, and a planetary gear set (50).

[0052] Referring to FIGS. 1 to 5, the above-mentioned driving unit (10) can be an engine or an electric motor. That is, any means of providing conventional driving force can be applied.

[0053] At this time, a driving pinion (11, 12) is provided at the end of the rotation shaft of the driving unit (10), and the driving pinion (11, 12) can be engaged with an arc-shaped tooth (21a) provided on the driving disk (20) to transmit driving force to the driving disk (20).

[0054] Referring to FIGS. 1 to 5, the above-mentioned driving disk (20) may have a plurality of arc-shaped teeth (21, 22, 23) formed on one surface.

[0055] At this time, the driving disk (20) may be formed in the shape of a disc having a certain thickness, and arc-shaped teeth (21, 22, 23, 21a, 22a, 23a) may be formed symmetrically on one side and the other side.

[0056] At this time, the drive disk (20) has three arc-shaped teeth (21, 22, 23) formed on its upper surface based on FIG. 1. Here, the number of arc-shaped teeth (21, 22, 23) is three as merely an example and is not limited thereto. Of course, in practice, it would be desirable to form five or more arc-shaped teeth.

[0057] At this time, the arc-shaped teeth (21, 22, 23) are composed of the first arc-shaped tooth (21), the second arc-shaped tooth (22), and the third arc-shaped tooth (23) on the outside, starting from the inner teeth.

[0058] At this time, any one of the plurality of arc-shaped teeth (21, 22, 23) may be formed with a different height. Here, the first arc-shaped tooth (21), which is the innermost arc-shaped tooth, is formed with a lower height than the others. As will be described later, a structure can be provided in which the output rotation direction can be reversed by forming the first arc-shaped tooth (21) with a different height.

[0059] At this time, the plurality of arc-shaped teeth (21, 22, 23) can all be formed to have uniform teeth. Accordingly, the first driving pinion (31, 32, 33), which is a gear meshing with each of the plurality of arc-shaped teeth (21, 22, 23), can use the same gear. Through this, the rotational force provided from the driving unit (10) can be shifted, and the gear ratio calculation can also be easily performed.

[0060] At this time, referring to FIGS. 1 and FIGS. 3, an arc-shaped tooth profile (21a, 22a, 23a) can be formed in the same way on the lower surface opposite the driving disk (20).

[0061] That is, the driving disk (20) has three arc-shaped teeth (21a, 22a, 23a) formed on its lower surface as well, based on FIG. 1.

[0062] At this time, the arc-shaped tooth profiles (21a, 22a, 23a) are composed of the first arc-shaped tooth profile (21a), the second arc-shaped tooth profile (22a), and the third arc-shaped tooth profile (23a) from the inner tooth profile to the outer tooth profile.

[0063] At this time, any one of the plurality of arc-shaped teeth (21a, 22a, 23a) may be formed with a different height. Here, the first arc-shaped tooth (21a), which is the innermost arc-shaped tooth, is formed with a lower height than the others. As will be described later, a structure can be provided in which the output rotation direction can be reversed by forming the first arc-shaped tooth (21a) with a different height.

[0064] At this time, the plurality of arc-shaped teeth (21a, 22a, 23a) can all be formed to have uniform teeth. Accordingly, the second drive pinion (41, 42, 43), which is a gear meshing with each of the plurality of arc-shaped teeth (21a, 22a, 23a), can use the same gear. As previously described, this allows for the transmission of rotational force provided by the drive unit (10) to be changed and the calculation of the gear ratio to be easily performed.

[0065] Here, the driving pinion (11, 12) of the driving unit (10) engages with the outermost arc-shaped tooth (23a) to transmit the driving force of the driving unit (10) to the driving disk (20).

[0066] Referring to FIGS. 1 to 4, the plurality of first driving pinions (31, 32, 33) can be engaged with the plurality of arc-shaped teeth (21, 22, 23).

[0067] At this time, the plurality of first driving pinions (31, 32, 33) include the same number as the number of arc-shaped teeth (21, 22, 23) of the driving disk (20), and can be engaged to correspond to each arc-shaped tooth (21, 22, 23). Here, the first driving pinion (31) is engaged with the innermost first arc-shaped tooth (21), which is designed to be lower in height, through a reverse pinion (34), thereby providing driving force in the opposite direction.

[0068] At this time, a plurality of arc-shaped teeth (21a, 22a, 23a) are formed on the opposite side of the driving disk (20), and the plurality of second driving pinions (41, 42, 43) are engaged with the plurality of arc-shaped teeth (21a, 22a, 23a) formed on the opposite side, as described above.

[0069] At this time, the first driving pinion (31) is engaged with the innermost first arc-shaped tooth profile (21a), which is designed to be low in height, through the reverse pinion (34), thereby providing driving force in the opposite direction. Here, the height can be based on the height protruding from the center height of the driving disk (20). Therefore, it means that the height is high according to the drawing standards, but low in terms of the protruding height.

[0070] At this time, the plurality of second driving pinions (41, 42, 43) include the same number as the number of arc-shaped teeth (21a, 22a, 23a) of the driving disk (20), and can be engaged to correspond to each arc-shaped tooth (21a, 22a, 23a). Here, the second driving pinion (41) is engaged with the innermost first arc-shaped tooth (21a), which is designed to be lower, through the reverse pinion (44), thereby providing driving force in the opposite direction. In addition, the driving pinion (11, 12) of the driving unit (10) is engaged with the outermost arc-shaped tooth (23a) to provide driving force to the driving disk (20).

[0071] The first variable rotation shaft (35) has a plurality of first driving pinions (31, 32, 33) inserted into its outer surface and can rotate by being constrained to one of the plurality of first driving pinions (31, 32, 33).

[0072] At this time, only one first drive pinion (31, 32, 33) is constrained and rotates on the first variable rotation shaft (35), while the remaining first drive pinions (31, 32, 33) rotate in idle mode. Therefore, since the rotational speed is determined by the engaged first drive pinions (31, 32, 33), speed shifting becomes possible.

[0073] At this time, the first variable rotation axis (35) can be formed in a direction perpendicular to the rotation center of the drive disk (20). Thus, various speed changes can be achieved while switching the rotational drive of the drive disk (20) in a vertical direction.

[0074] Referring to FIG. 1 and FIG. 3, the second variable rotation shaft (45) has a plurality of second driving pinions (41, 42, 43) inserted into its outer surface and can rotate by being constrained to one of the plurality of second driving pinions (41, 42, 43).

[0075] At this time, a ring gear drive pinion (46) is installed at the end of the second variable rotation shaft (45) and engages with the inner side of the ring gear (53) described later to transmit the driving force of the second variable rotation shaft (45).

[0076] With reference to FIGS. 1 to 4, the above release means can engage or disengage the first variable rotation shaft (35) with any one of the plurality of first driving pinions (31, 32, 33).

[0077] Likewise, the second variable rotation axis (45) can be engaged with or disengaged from one of the plurality of second drive pinions (41, 42, 43).

[0078] At this time, the release means may be a restraint key that is inserted and discharged between the first variable rotation shaft (35) and the plurality of first driving pinions (31, 32, 33).

[0079] Likewise, the release means may be a restraint key that is inserted and discharged between the second variable rotation axis (45) and the plurality of second driving pinions (41, 42, 43).

[0080] At this time, the first variable rotation axis (35) on the upper surface of the drive disk (20) engages with one of the first drive pinions (31, 32, 33) into which the restraining key has entered the key groove (31a, 32a, 33a), and is restrained thereto to rotate at the corresponding speed. Of course, the second variable rotation axis (45) on the lower surface of the drive disk (20) will likewise operate as it engages with the key groove (31a, 32a, 33a) of the restraining key.

[0081] Here, a keyway (31a, 32a, 33a) is formed in each of the first driving pinion (31, 32, 33) and the first variable rotation shaft (35), and when a restraining key is inserted into the keyway (31a, 32a, 33a), it engages, and when the restraining key is removed from the keyway (31a, 32a, 33a), the restraint can be released.

[0082] This movement of the restraint key can be applied to both manual and automatic transmissions, and a method of changing existing gear ratios may also be introduced.

[0083] Referring to FIGS. 1 to 5, the planetary gear set (50) may include a carrier (51), a plurality of planetary pinions (52), a sun gear (54), and a ring gear (53).

[0084] The carrier (51) is connected to the first variable rotation shaft (35) to receive rotational force. Here, the carrier (51) performs the role of rotatably fixing a plurality of planetary pinions (52), and here, it serves to receive the driving force transmitted from the first variable rotation shaft (35) as input driving to the planetary gear set (50).

[0085] Of course, the ring gear (53) of the ring gear drive pinion (46) of the second variable rotation axis (45) can also be received as an input drive to the planetary gear set (50).

[0086] The plurality of planetary pinions (52) can be inserted into the outer surface of rotation shafts (52a) arranged along the circumferential direction on the carrier (51). Additionally, each planetary pinion (52) can be installed to mesh between the inner tooth profile (53a) of the ring gear (53) and the sun gear (54).

[0087] At this time, when the carrier (51) rotates by input drive, a plurality of planetary pinions (52) can orbit around the sun gear (54) in that direction and simultaneously rotate around each rotation axis (52a).

[0088] The above sun gear (54) is positioned coaxially with the carrier (51) and meshes with the plurality of planetary pinions (52), and the first output shaft (55) is connected to output a shifted output.

[0089] At this time, the first output shaft (55) through the sun gear (54) is the same as the rotational speed of the sun gear (54) by the planetary pinion (52).

[0090] At this time, a plurality of distribution pinions (57) engaged with the first output shaft (55) may be installed, and a plurality of distribution output shafts (57a) each constituting the rotation axis of the plurality of distribution pinions (57) may be installed. Accordingly, the rotational driving force of the first output shaft (55) may be provided to other plurality of outputs through the distribution pinions (57).

[0091] This distribution of driving force can be very usefully applied in cases where multiple wings are driven, such as in drones.

[0092] The above ring gear (53) can be engaged with the outer side of the plurality of planetary pinions (52).

[0093] At this time, a plurality of output pinions (56) that mesh with the inner teeth (53a) of the ring gear (53) may be installed, and a plurality of second output shafts (56a) that each constitute the rotational axis of the plurality of output pinions (56) may be installed. Accordingly, the driving force of the ring gear (53) may be provided in multiple ways, and as described above, it may be applicable to devices such as drones.

[0094] At this time, a ring gear driving pinion (46) may be installed, which is provided on the second variable rotation shaft (45) and meshes with the inner tooth profile (53a) of the ring gear (53) of the planetary gear set (50) to transmit the rotational force of the second variable rotation shaft (45) to the ring gear (53).

[0095] At this time, a third output shaft (58a) can be installed to output the rotational force of the ring gear (53) through a pinion (58) engaged with the outer surface of the ring gear (53).

[0096] At this time, the ring gear (53) has an inner tooth profile (53a) and an outer tooth profile (53b) formed therein, and a protruding ring (53c) is formed in the middle part of the inner tooth profile (53a) to divide the inner tooth profile (53a) into front and back sections.

[0097] Accordingly, a ring gear drive pinion (46) is engaged with an inner tooth profile (53a) on the drive disk (20) side, planetary pinions (52) are engaged with an inner tooth profile (53a) formed on a protruding ring (53c), and a plurality of output pinions (56) are engaged on the first output shaft (55) side so as to distribute the rotational drive of the ring gear (53) into multiple outputs.

[0098] Referring to FIG. 1, a perspective view of a power transmission device according to a first embodiment of the present invention is shown.

[0099] In the illustrated embodiment, driving force is provided to the driving disk (20) from the driving unit (10). Here, the driving unit (10) can be any driving force capable of rotating the driving pinion, such as an electric motor, an internal combustion engine such as an engine, a pedal powered by human power, wind power, or water power.

[0100] At this time, the driving force of the driving unit (10) is transmitted to the driving disk (20) in a state where it is engaged with the outermost third arc-shaped tooth (23a) among the arc-shaped teeth (21a, 22a, 23a) provided on the lower surface of the driving disk (20) of the driving pinion.

[0101] At this time, one side equipped with two driving parts here may not be a driving part but a regenerative braking connection part for regenerative braking.

[0102] At this time, the driving disk (20) is provided with a first arc-shaped tooth profile (21, 21a), a second arc-shaped tooth profile (22, 22a), and a third arc-shaped tooth profile (23, 23a) in sequence from the inside on the upper surface and lower surface, respectively.

[0103] At this time, the second arc-shaped tooth profile (22, 22a) and the third arc-shaped tooth profile (23, 23a) have the same height protruding from the driving disk (20), and the first arc-shaped tooth profile (21, 21a) is designed to have a lower height. As previously mentioned, this difference is intended to transmit the rotational force of the driving disk (20) in the opposite direction.

[0104] At this time, identical gears are inserted into the outer surface of the first variable rotation shaft (35) at a distance of arc-shaped teeth (21, 22, 23). These form a plurality of first driving pinions (31, 32, 33).

[0105] At this time, the first driving pinion (32, 33) placed at the corresponding position is engaged with the second arc-shaped tooth (22) and the third arc-shaped tooth (23), respectively.

[0106] At this time, the first driving pinion (31) positioned at the location of the first arc-shaped tooth (21) is not directly engaged with the first arc-shaped tooth (21), but is gear-connected via a reverse pinion (34). That is, the reverse pinion (34) engages with the first arc-shaped tooth (21), and the first driving pinion (31) engages with the reverse pinion (34).

[0107] As previously mentioned, the driving force of the driving disk (20) can be transmitted in the opposite direction by these reverse pinions (34, 44).

[0108] At this time, if the restraining key reaches the restraining position on any one of the first driving pinions (31, 32, 33), the pinion transmits the rotational force of the driving disk (20) to the first variable rotation shaft (35), and the gear ratio can be determined according to the position of the pinion.

[0109] At this time, when the restraining key of the first driving pinion (31) engaged with the first arc-shaped pinion is positioned in the restraining position, the rotational direction of the transmitted rotational force passes through the reverse pinion (34), so the first variable rotation shaft (35) receives rotational force rotating in the opposite direction.

[0110] In the illustrated embodiment, the carrier (51) of the planetary gear set (50) is connected to the end of the first variable rotation shaft (35) to receive rotational driving force.

[0111] At this time, the rotational driving force of the first variable rotation axis (35) is transmitted to the carrier (51), and the rotation of the carrier (51) causes the planetary pinion (52) to revolve around the sun gear (54).

[0112] At this time, the orbital driving force of the planetary pinions (52) rotates the meshed sun gear (54) when the ring gear (53) is fixed, and the rotational force of the sun gear (54) can be output to the first output shaft (55).

[0113] At this time, the rotational force output to the first output shaft (55) can be distributed through a distribution gear (55a), a plurality of distribution pinions (57), and a plurality of distribution output shafts (57a). By distributing the rotational drive output in this way, for example, multiple wings of a drone can be driven simultaneously.

[0114] In the illustrated embodiment, when the sun gear (54) is in a fixed state while the planetary pinions (52) are orbiting with the rotational force of the carrier (51) provided, the orbital driving force of the planetary pinions (52) is transmitted to the ring gear (53) to rotate the ring gear (53) in the same direction.

[0115] At this time, a plurality of output pinions (56) that mesh with the ring gears (53) are meshed in the front side of the protruding ring (53c) of the ring gear (53), that is, in the direction where the first output shaft (55) is positioned, and a second output shaft (56a) is fixed to each output pinion (56).

[0116] Accordingly, the driving force transmitted by the carrier (51) drives multiple second output shafts (56a) through multiple planetary pinions (52) and ring gears (53). Of course, the second output shafts (56a) can simultaneously drive multiple wheels or wings as described above.

[0117] In the illustrated embodiment, teeth (20a) are also formed on the side of the drive disk (20), so that the drive disk (20) can be driven. This is very useful when connected to a pedal.

[0118] At this time, a tension connection part (36) is formed between the connection of the first variable rotation shaft (35) and the carrier (51) to dampen the driving force transmission shock.

[0119] Of course, tension connection parts (56b, 57b) are also formed in the connection part with the second variable rotation axis (45) and the connection part of the output axes.

[0120] Referring to FIG. 2, an enlarged view of the first driving pinion portion of a power transmission device according to the first embodiment of the present invention is shown.

[0121] In the illustrated embodiment, a keyway (31a, 32a, 33a) is formed in each of the first variable rotation axis (35) and the first driving pinion (31, 32, 33), and a restraining key is inserted into and ejected from the keyway (31a, 32a, 33a) to determine whether the first driving pinion (31, 32, 33) is restrained or released from the first variable rotation axis (35). That is, when the restraining key is fully inserted into the keyway (31a, 32a, 33a), the driving force of the corresponding first driving pinion (31, 32, 33) is transmitted to the first variable rotation shaft (35), and when the restraining key is removed from the keyway (31a, 32a, 33a) of the first driving pinion (31a, 32a, 333), the restraint is released, and the corresponding first driving pinion (31, 32, 33) cannot transmit driving force and rotates idly without load.

[0122] At this time, the first driving pinion (31, 32, 33), the first variable rotation shaft (35), and the restraining key form the first gear shift assembly (30).

[0123] The movement of such restraint keys can be designed to be performed manually or automatically, just like the transfer of general keys.

[0124] At this time, the operation and structure of the key groove (31a, 32a, 33a) and the restraining key are the same in relation to the second driving pinion (41, 42, 43) and the second variable rotation axis (45).

[0125] At this time, the second drive pinion (41, 42, 43), the second variable rotation shaft (45), and the restraining key form the second gear shift assembly (40).

[0126] Referring to FIG. 3, a front view of a power transmission device according to a first embodiment of the present invention is shown.

[0127] In the illustrated embodiment, the driving force of the driving unit (10) is transmitted to the driving disk (20) to drive the driving disk (20).

[0128] At this time, when a restraining key is inserted into either the first driving pinion (31, 32, 33) or the second driving pinion (41, 42, 43) and restraint is achieved, the corresponding driving pinion and the first variable rotation shaft (35) or the second variable rotation shaft are engaged to transmit the shifted driving force to the carrier (51) or ring gear (53).

[0129] At this time, when driving force is transmitted to the carrier (51) through the first driving pinion (31, 32, 33), the carrier (51) causes the planetary pinions (52) to revolve, and if the ring gear (53) is in a fixed state, the driving force can be entirely transmitted to the sun gear (54) and then output to the first output shaft (55) as described above.

[0130] At this time, if the sun gear (54) is fixed instead of the ring gear (53), the driving force transmitted to the carrier (51) can be transmitted to the ring gear (53) as described above.

[0131] At this time, the transmission and distribution to the first output shaft (55) and the second output shaft (56a) is as described above.

[0132] Meanwhile, the driving force transmitted through the second driving pinion (41, 42, 43) and the ring gear driving pinion (46) rotates the ring gear (53), and output can be achieved through the second output shaft (56a), and a shifted output can be achieved through the third output shaft (58a) via the pinion (58) engaged with the outer tooth profile (53b) of the ring gear (53).

[0133] Referring to FIG. 4, a perspective view is shown showing the connection between a first driving pinion and a planetary gear set (50), which are some components of a power transmission device according to the first embodiment of the present invention.

[0134] In the illustrated embodiment, a plurality of first drive pinions (31, 32, 33) are installed on the first variable rotation shaft (35) at spaced intervals. The same gear may be applied to the first drive pinions (31, 32, 33).

[0135] At this time, a carrier (51), a sun gear (54), and a first output shaft (55) can be installed in sequence on the same axis as the first variable rotation shaft (35).

[0136] At this time, the first variable rotation shaft (35) and the carrier (51) are connected to transmit rotational driving force, but the sun gear (54) and the first output shaft (55) are not connected. Only the sun gear (54) is engaged and connected through the planetary pinion (52).

[0137] At this time, the first output shaft (55) is equipped with a distribution pinion (57) to distribute the output.

[0138] Referring to FIG. 5, a rear view of a planetary gear set, which is a component of a power transmission device according to the first embodiment of the present invention, is shown.

[0139] In the illustrated embodiment, a planetary gear set (50) viewed from the first output shaft (55) is illustrated.

[0140] At this time, a ring gear (53) is positioned at the outermost edge. Four second output shafts (56a) are installed to mesh with the inner teeth (53a) of the ring gear (53).

[0141] At this time, the second output shaft (56a) is installed to rotate only while meshing with the ring gear and not to revolve, so that the output of the ring gear (53) can be distributed to each second output shaft (56a).

[0142] At this time, four planetary pinions (52) are installed to mesh with the inner teeth (53a) of the protruding ring (53c) of the ring gear (53).

[0143] At this time, the planetary pinion (52) can also mesh with the central sun gear (54) and revolve around the sun gear (54).

[0144] At this time, the planetary pinions (52) are each installed along the circumferential direction of the carrier (51) at equal distances via their respective rotation axes (52a).

[0145] At this time, a planetary pinion (52) is engaged with the tooth profile of the protruding ring (53c) portion based on the protruding ring (53c) formed on the inner side of the ring gear (53), and a ring gear driving pinion (46) is engaged with the inner tooth profile (53a) in the direction of the second variable rotation axis (45) based on the protruding ring (53c). An output pinion (56) is engaged with the inner tooth profile (53a) on the opposite side to drive the second output axis (56a).

[0146] In this way, the driving force of the first variable rotation axis (35) and the second variable rotation axis (45) can be controlled to various gear ratios by changing the setting of the planetary gear set (50) to the first output axis (55), the second output axis (56a), and the third output axis.

[0147] Referring to FIG. 6, a front view of a power transmission device according to a second embodiment of the present invention is shown, and referring to FIG. 7, a perspective view showing the connection between a first driving pinion and a planetary gear set (50) of a power transmission device according to a second embodiment of the present invention is shown.

[0148] In the illustrated embodiment, the gear (35a) provided on the first variable rotation axis (35) and the gear (51b) provided on the carrier (51) are engaged so that the rotation of the first variable rotation axis (35) is shifted and transmitted to the carrier (51).

[0149] At this time, compared to the above-described embodiment, the drive disk (20) is formed with a thicker thickness and has a structure in which the distance between the first variable rotation axis (35) and the second variable rotation axis (45) is increased.

[0150] At this time, the first variable rotation shaft (35) is not directly connected to the carrier (51) on the same axis, but is connected to each other through gears (35a, 51b) provided respectively. Therefore, the first variable rotation shaft (35), the carrier (51), and the first output shaft (55, 55a) are not arranged on the same axis.

[0151] Here, the first output shaft (55, 55a) can output in the forward and backward directions, thereby enabling four-wheel drive.

[0152] Referring to FIG. 8, a front view of a power transmission device according to a third embodiment of the present invention is shown.

[0153] In the illustrated embodiment, a drive gear (12) is installed that engages with a pair of drive disks (20) and transmits driving force from a drive unit (10) to the pair of drive disks (20).

[0154] At this time, a pair of drive disks (20) can be driven by a single drive unit (10), and a structure is presented in which a pair of power transmission devices (1) according to the first embodiment described above can be driven by a single drive unit (10).

[0155] Referring to FIG. 9, a perspective view of a power transmission device according to a fourth embodiment of the present invention is shown.

[0156] In the illustrated embodiment, the power transmission device represents a case where a plurality of first and second gear shift assemblies (30, 40) are provided on the drive disk (20).

[0157] At this time, a modified example is presented in which all remaining parts, excluding the drive disk (20) in the power transmission device (1) according to the first embodiment described above, are manufactured as a pair and arranged in a perpendicular direction.

[0158] At this time, it can be seen that various outputs are possible by one driving unit (10) and one driving disk (20). Of course, the load may be greater than that of the previously described embodiments.

[0159] Referring to FIG. 10, a perspective view of a power transmission device according to the fifth embodiment of the present invention is shown.

[0160] In the illustrated embodiment, a power transmission device is presented configured to further include a bevel gear set connecting the first variable rotation shaft (35) and the carrier (51) in the first embodiment described above.

[0161] At this time, the end of the first variable rotation axis (35) and the end of the central rotation axis (135) of the carrier (51) are connected by bevel gears (136, 137), and the end of the second variable rotation axis (45) can also be connected by bevel gears to the end of the rotation axis of the ring gear drive pinion (46).

[0162] At this time, the driving force of the first variable rotation axis (35) and the second variable rotation axis (45) is transmitted vertically to produce an output.

[0163] Referring to FIG. 11, a perspective view of a power transmission device according to the sixth embodiment of the present invention is shown.

[0164] In the illustrated embodiment, a structure capable of driving a pair of planetary gear sets, rather than a single planetary gear set (50) of the first embodiment described above, is presented.

[0165] Here, in the fifth embodiment described above, if a planetary gear set (50) of the same shape is applied to the opposite side of the planetary gear set (50), a pair of planetary gear sets (50) are connected to one drive unit (10) and drive disk (20) through bevel gears (136, 137), thereby doubling the number of output shafts and making it possible to apply to cases with a large number of drive wheels or drive blades.

[0166] Although embodiments of the present invention have been described, the spirit of the present invention is not limited by the embodiments presented in this specification. Those skilled in the art who understand the spirit of the present invention may easily propose other embodiments within the scope of the same spirit by adding, changing, deleting, or adding components, and such are also to be considered to fall within the scope of the spirit of the present invention.

[0167] In one aspect of the present invention, the power transmission device drives a drive disc, and since the driving force is transmitted to a planetary gear set in a state where gear shifting has already occurred on the drive disc, the overall size of the transmission device can be reduced. In addition, in another aspect of the present invention, the power transmission device is a very useful invention that enables smooth operation not only in internal combustion engines but also in cases such as electric vehicles or drones that drive individual wheels, because the driving force can be appropriately distributed.

Claims

1. Driving unit; A driving disk having a plurality of arc-shaped teeth formed on one surface that engage with the driving unit; A plurality of first driving pinions engaging with the plurality of arc-shaped teeth above; A first variable rotation shaft in which a plurality of first driving pinions are inserted into the outer surface and which rotates while being constrained to one of the plurality of first driving pinions; and A release means comprising: engaging or disengaging the first variable rotation axis with one of the plurality of first driving pinions; Power transmission device.

2. In Paragraph 1, A plurality of arc-shaped teeth are also formed on the opposite side of the above-mentioned drive disk, and A plurality of second driving pinions engaged with the plurality of arc-shaped teeth formed on the opposite side; A second variable rotation shaft in which a plurality of second driving pinions are inserted into the outer surface and which rotates while being constrained to one of the plurality of second driving pinions; and A release means comprising: engaging or disengaging the second variable rotation axis with one of the plurality of second drive pinions; Power transmission device.

3. In Paragraph 1, The above-mentioned release means is a restraint key that is inserted and discharged between the first variable rotation axis and the plurality of first driving pinions, Power transmission device.

4. In Paragraph 1, One of the above plurality of arc-shaped teeth is formed at a different height, Power transmission device.

5. In Paragraph 4, A reverse pinion comprising a tooth profile formed at a different height among the plurality of arc-shaped tooth profiles and simultaneously engaging with one of the plurality of first driving pinions to rotate the first variable rotation axis in the opposite direction. Power transmission device.

6. In Paragraph 1, The plurality of first driving pinions above are formed with the same size and tooth profile, Power transmission device.

7. In Paragraph 1, The above drive unit is one selected from an engine, an electric motor, a pedal, wind power, or hydropower, Power transmission device.

8. In Paragraph 1, A planetary gear set connected to the first variable rotation shaft to change the rotational driving force of the first variable rotation shaft, Power transmission device.

9. In Paragraph 8, The above planetary gear set is, A carrier connected to the above-mentioned first variable rotation axis to receive rotational force; A plurality of planetary pinions inserted into the outer surfaces of rotation axes arranged along the circumferential direction of the above carrier; A sun gear disposed coaxially with the carrier and meshing with the plurality of planetary pinions, with a first output shaft connected to output a shifted output; and A ring gear that meshes with the outer side of the plurality of planetary pinions; comprising Power transmission device.

10. In Paragraph 9, A plurality of output pinions each meshing with the inner side of the above ring gear; and A plurality of second output shafts each constituting the rotational axis of the plurality of output pinions; comprising Power transmission device.

11. In Paragraph 9, A plurality of distribution pinions engaged with the first output shaft; and A plurality of distribution output shafts each constituting the rotation axis of the plurality of distribution pinions; comprising Power transmission device.

12. In Paragraph 2, A planetary gear set connected to the first variable rotation shaft to change the rotational driving force of the first variable rotation shaft; and A ring gear drive pinion provided on the second variable rotation shaft and meshing with the inner side of the ring gear of the planetary gear set to transmit the rotational force of the second variable rotation shaft to the ring gear, Power transmission device.

13. In Paragraph 9, A third output shaft that outputs the rotational force of the ring gear through a pinion engaged with the outer surface of the ring gear, Power transmission device.

14. In Paragraph 9, A gear provided on the first variable rotation axis and a gear provided on the carrier mesh with each other so that the rotation of the first variable rotation axis is shifted and transmitted to the carrier, thereby enabling four-wheel drive. Power transmission device.

15. In Paragraph 1, A drive gear comprising a drive disc that meshes with a pair of drive discs and transmits driving force from a drive unit to the pair of drive discs. Power transmission device.

16. In Paragraph 1, The above driving disk is equipped with a plurality of the first variable rotation axes, Power transmission device.

17. In Paragraph 9, A bevel gear set connecting the first variable rotation axis and the carrier, Power transmission device.

18. In Paragraph 17, The above carrier is connected in pairs through the above bevel gear set, Power transmission device.

19. In Paragraph 1, The side of the above-mentioned drive disk is provided with a tooth profile to enable driving from the side, Power transmission device.

20. In Paragraph 1, A gear for regenerative braking is engaged with the above-mentioned drive disc, Power transmission device.

21. In Paragraph 1, The above plurality of arc-shaped teeth are formed with different sizes, Power transmission device.

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