Transmission device with improved energy efficiency

Abstract

The present invention relates to a transmission device with improved energy efficiency, wherein the balance between the torque and RPM is always adjusted to an optimal state so that smooth power transmission is possible, and additional devices required for existing transmission devices are not required, thereby simplifying the structure.

Description

Transmission device with improved energy efficiency

[0001] The present invention relates to a transmission device with improved energy efficiency.

[0002] In general, automatic transmissions are configured so that the gear of the target gear is operated and automatic shifting is performed by controlling the hydraulic pressure through a transmission control device that controls a number of solenoid valves according to the driving speed, the opening rate of the throttle valve, and various detection conditions.

[0003] When the select lever is shifted to the desired gear, the port of the manual valve is shifted, and the hydraulic pressure supplied from the oil pump is selectively operated to operate various operating elements of the transmission mechanism according to the duty control of the solenoid valve, thereby performing gear shifting.

[0004] An automatic transmission that operates on this principle has friction elements that are released from an operating state and friction elements that are converted from a released state to an operating state when shifting to each target gear is executed, and the shifting performance is determined according to the timing of release and start of operation of these friction elements.

[0005] For example, automatic transmissions change gears by engaging and disengaging operating elements for each gear, such as clutches, brakes, and one-way clutches, determined by the combination of planetary gears. In particular, when driving in first speed, engagement of the brake and one-way clutch is essential.

[0006] However, conventional automatic transmissions have the problem of complex internal structures and increased productivity and manufacturing costs because they require essential accessories such as sensors and hydraulic devices.

[0007] The present invention has been devised to solve the above problems, and the purpose of the present invention is to provide a transmission device with improved energy efficiency that enables smooth power transmission by always maintaining an optimal balance between torque and RPM.

[0008] In addition, another object of the present invention is to provide a transmission device with improved energy efficiency and a simplified structure by omitting auxiliary devices required for existing transmission devices.

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

[0010] In order to solve the above problem, the present invention provides a transmission device with improved energy efficiency, comprising: a non-circular gear unit that is connected to an input side and rotates, generating periodic waves by a non-circular gear; a one-way clutch unit that is connected to the non-circular gear unit and rotates in one direction; an elastic body that is mounted on the inside of the one-way clutch unit and reduces the rotational speed by an elastic coefficient applied during rotation; and a weight that is coupled to one side of the one-way clutch unit.

[0011] The above non-circular gear portion comprises a first housing having a circular shape and having one side open; at least one non-circular gear mounted on the inside of the first housing; and a second housing fixed to one side of the first housing.

[0012] The above one-way clutch unit includes a cover having an operating space on one side; a holder located at the inner center of the cover; and a one-way clutch coupled to the holder and rotating in one direction.

[0013] The holder comprises: a body that is coupled to the non-circular gear and rotates; at least one fixed end that protrudes from the outside of the body and fixes an elastic body; and a space formed between the fixed ends and that accommodates one end of the elastic body.

[0014] When the above transmission devices are added one by one and the ratio of the above non-circular gear is 2:1, the RPM changes within the gear ratio range of 1:1 to 1:2 for the first gear, 1:1 to 1:4 for the second gear, and 1:1 to 1:8 for the third gear.

[0015] According to the present invention, the balance between torque and RPM is always adjusted to an optimal state, thereby improving energy efficiency.

[0016] In addition, according to the present invention, the structure is simplified by omitting auxiliary devices required for existing transmission devices, thereby reducing manufacturing costs and improving marketability.

[0017] FIG. 1 is an exploded perspective view of a transmission device with improved energy efficiency according to one embodiment of the present invention.

[0018] FIG. 2 is a cross-sectional view of a transmission device with improved energy efficiency according to one embodiment of the present invention.

[0019] Figure 3 is a detailed drawing showing a non-circular gear part of the present invention.

[0020] Figure 4 is a detailed drawing showing the entire one-way clutch unit of the present invention.

[0021] Figure 5 is a detailed drawing showing the holder of the present invention.

[0022] Figure 6 is a cross-sectional view of a transmission device to which the present invention is applied in a continuously installed state.

[0023] Figure 7 is a photograph of a transmission device to which the present invention is applied being installed continuously.

[0024] Hereinafter, with reference to the attached drawings, embodiments of the present invention will be described in detail so that those skilled in the art can easily practice the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description have been omitted for clarity of description, and the same reference numerals designate identical or similar components throughout the specification.

[0025] In this specification, it should be understood that terms such as "include" or "have" are intended to specify the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof. In addition, when it is said that a part such as a layer, film, region, or plate is "on" another part, this includes not only the case where it is "directly on" the other part, but also the case where there is another part in between. Conversely, when it is said that a part such as a layer, film, region, or plate is "under" another part, this includes not only the case where it is "directly under" the other part, but also the case where there is another part in between.

[0026] First, FIG. 1 is an exploded perspective view of a transmission device with improved energy efficiency according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a transmission device with improved energy efficiency according to an embodiment of the present invention.

[0027] A transmission device with improved energy efficiency according to one embodiment of the present invention may include a non-circular gear unit (100), a one-way clutch unit (200), an elastic body (300), and a weight (400).

[0028] The above non-circular gear part (100) can be connected to the input side (INPUT) of a motor or engine of an electric vehicle, electric bicycle, etc., and rotated.

[0029] Referring to FIG. 3, the non-circular gear portion (100) includes a first housing (110), a non-circular gear (120), and a second housing (130).

[0030] The above first housing (110) is for coupling a non-circular gear (120), and is formed in either a circular or polygonal shape to rotate.

[0031] The first housing (110) may have a rotation space (111) formed so that one side is open.

[0032] The above rotation space (111) can be formed as a space of a size in which the non-circular gears (120) can rotate at different rotation radii, and the rotation space (111) can be circular, triangular, or square.

[0033] A mounting groove (112) is formed in the above rotation space (111) so that a bearing (500) can be mounted.

[0034] At least one of the above non-circular gears (120) is mounted in the rotation space (111) and rotates while meshing with each other.

[0035] The non-circular gear (120) may include a first gear (121) and a second gear (122).

[0036] The first and second gears (121)(122) are formed with different length and width ratios, and the length and width ratio can be formed as 2:1.

[0037] The above first and second gears (121)(122) may have axes formed, and a coupling shaft (121a)(122a) belonging to a short axis may be formed on one side, and a driving shaft (121b)(122b) belonging to a long axis and transmitting power may be formed on the other side.

[0038] The above non-circular gear (120) can rotate while generating periodic waves due to a gear ratio of 2:1, unlike a general circular gear.

[0039] These waves are transmitted to the one-way clutch unit (200) and the elastic body (300) to create a difference between the RPM of the input side (INPUT) and the RPM of the output side (OUTPUT).

[0040] The transmission device of the present invention can change the RPM according to the number of added parts.

[0041] That is, referring to FIGS. 6 and 7, when the transmission device is installed in only one stage, it has a gear ratio of 1:1 to 1:2, when the transmission device is installed in two stages, it has a gear ratio of 1:1 to 1:4, and when the transmission device is installed in three stages, the RPM changes within a gear ratio range of 1:1 to 1:8.

[0042] For example, if the RPM of the input side is 1000 RPM, the RPM passing through the non-circular gear (120) rotates while generating waves that periodically go back and forth between 2000 RPM (maximum) and 500 RPM (minimum).

[0043] At this time, the average RPM is maintained at 1000 RPM, the same as the input side, and the rotation proceeds.

[0044] A one-way clutch unit (200) and an elastic body (300) are connected to the input side that performs this movement, and if it is in an idling state that does not consume energy, the RPM of the output side (OUTPUT) rotates at 2000 RPM, which is the maximum RPM at the moment of the wave. This can be said to be an ideal state in which there is no frictional resistance or air resistance.

[0045] If force is applied to the output side (OUTPUT) rather than the idle state, the rotation speed of 2000 RPM will cause a change in RPM (RPM decrease) equivalent to the force applied to the output side (OUTPUT).

[0046] That is, depending on how much force is applied to the output side (OUTPUT), the torque and RPM can be adjusted automatically between 1000 RPM and 2000 RPM.

[0047] In addition, when the horizontal and vertical gear ratio of the non-circular gear (120) is 3:1 and one transmission device is added, the range of rotatable RPM increases by three times.

[0048] That is, when the transmission device is installed in 1st gear, the RPM changes within the gear ratio range of 1:1 to 1:3, when the transmission device is installed in 2nd gear, the RPM changes within the gear ratio range of 1:1 to 1:9, and when the transmission device is installed in 3rd gear, the RPM changes within the gear ratio range of 1:1 to 1:27.

[0049] The above second housing (130) can be fixed to one side of the first housing (110).

[0050] A non-circular gear (120) is mounted in the rotation space (111) of the first housing (110) and can be fixed to one side of the first housing (110) by a fixing screw.

[0051] The second housing (130) guides the rotation of the non-circular gear (120) smoothly and covers the non-circular gear (120) so that it is not exposed to the outside.

[0052] In addition, the one-way clutch unit (200) is connected to the non-circular gear unit (100) and rotates in one direction.

[0053] The one-way clutch unit (200) can be connected to the drive shaft (121b) (122b), and rotation of the drive shaft (121b) (122b) in one direction is possible, but rotation in the other direction is not possible. In other words, the one-way clutch unit (200) only receives energy generated on the input side (INPUT) and cannot transmit it back to the input side.

[0054] Referring to FIG. 4, the one-way clutch unit (200) may include a cover (210), a holder (220), and a one-way clutch (230).

[0055] The above cover (210) is formed in a circular shape and can rotate through a non-circular gear portion (100).

[0056] The cover (210) has a shape in which one side is open and the other side is closed, and an operating space (211) in which an elastic body (300) can operate is formed in the open direction.

[0057] A joining hole (212) may be formed in the inner center of the cover (210) to allow a non-circular gear (120) to be joined.

[0058] At least one fixed space (213) may be formed on the inner surface of the edge of the cover (210) to which the other end of the elastic body (300) is fixed.

[0059] The elastic body (300) can be fixed by inserting a coupling pin (214) while the other end of the elastic body (300) is connected to the above-mentioned fixed space (213).

[0060] The above holder (220) can be positioned at the inner center of the cover (210).

[0061] Referring to FIG. 5, the holder (220) may include a body (221), a fixed end (222), and a space (223).

[0062] The above body (221) can be coupled to a non-circular gear (120).

[0063] At least one of the above fixed ends (222) can be formed to protrude on the outside of the body (221).

[0064] The fixed end (222) may vary depending on the number of elastic bodies (300) to be coupled, and a pinhole may be formed through the end of the fixed end (222) to allow a coupling pin (224) to be fixed.

[0065] The above space (223) can be formed between the fixed ends (222).

[0066] The above fixed ends (222) are formed at regular intervals, and a space (223) is formed between them.

[0067] The space (223) is a space into which the other end of the elastic body (300) is fitted. When the other end of the elastic body (300) is fitted into the space (223) and the coupling pin (224) is fitted into the pin hole, the elastic body (300) can be fixed.

[0068] The above one-way clutch (230) can be coupled to a hole (221a) formed through the center of the holder (220).

[0069] The above one-way clutch (230) can be rotated together with the holder (220) by being coupled with the drive shaft (121b) (122b) of the non-circular gear (120).

[0070] Additionally, the elastic body (300) can be mounted on the inside of the one-way clutch unit (200).

[0071] Any elastic material such as rubber with elasticity, including a spring, can be used as the elastic body (300).

[0072] One end of the elastic body (300) is inserted into a space (223) formed in the holder (220), and the other end is inserted into a fixed space (213) of the cover (210) and can be fixed through a coupling pin (214) (224).

[0073] The elastic body (300) can be applied to at least one transmission device, and the larger the elastic modulus, the greater the load it can withstand, and the larger the elastic modulus of the elastic body (300), the slower the rotation speed of the one-way clutch unit (200).

[0074] The elastic body (300) can have different elastic coefficients applied to each stage from the 1st to the 3rd stage, and the transmission device that is installed last uses an elastic body (300) with a relatively weak elastic coefficient to prevent a rattling phenomenon when a load is applied to the input side.

[0075] If the elastic body (300) is in an idling state that does not consume energy, it rotates together with the one-way clutch unit (200), and if force is applied to the input side (INPUT), the rotation speed of the one-way clutch unit (200) may slow down. Accordingly, in the case of an uphill road, if the input side (INPUT) is 1000 RPM, the output side (OUTPUT) slows down by the amount of force applied to the elastic body (300).

[0076] In addition, the weight (400) can be attached to one side of the one-way clutch unit (200) and fixed through a fixing screw.

[0077] The weight (400) is a device used to store rotational energy and may be a disc-shaped flywheel or an electric core motor.

[0078] At least one weight (400) having a different moment of inertia can be applied to each of the first to third gears of the transmission. This allows the received rotational energy to be temporarily stored and then released, thereby improving power transmission efficiency even at low RPMs.

[0079] When the one-way clutch unit (200) rotates, the elastic body (300) may be elastically deformed, causing a rattling noise. The weight (400) can prevent this rattling phenomenon.

[0080] That is, the present invention creates a periodic wave in the rotational motion through a non-circular gear unit, and transmits this wave to a one-way clutch unit (200) and an elastic body (300) to create a difference between the RPM of the input side (INPUT) and the RPM of the output side (OUTPUT), thereby enabling the user to obtain a desired rotation ratio.

[0081] In addition, the present invention has a simple structure and thus reduces manufacturing costs since it does not require auxiliary devices such as sensors and hydraulic devices required for existing transmission devices.

[0082] Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Furthermore, such modifications should not be understood individually from the technical idea or prospect of the present invention.

Claims

1. A non-circular gear part (100) that is connected to the input side and rotates, generating periodic waves by a non-circular gear (120); A one-way clutch unit (200) connected to the above non-circular gear unit (100) and rotating in one direction; An elastic body (300) mounted on the inside of the one-way clutch unit (200) to reduce the rotation speed by the elastic coefficient applied during rotation; A transmission device with improved energy efficiency, comprising a weight (400) coupled to one side of the one-way clutch unit (200).

2. In claim 1, The above non-circular gear part (100) is First housing (110); At least one non-circular gear (120) mounted on the inside of the first housing (110); A transmission device with improved energy efficiency, comprising a second housing (130) fixed to one side of the first housing (110).

3. In claim 1, The above one-way clutch unit (200) is A cover (210) having an operating space (211) on one side; A holder (220) located at the inner center of the above cover (210); A transmission device with improved energy efficiency, comprising a one-way clutch (230) coupled to the holder (220) and rotating in one direction.

4. In claim 3, The above holder (220) is, A body (221) that rotates and is coupled to the above non-circular gear (120); At least one fixed member (222) protruding from the outside of the body (221) to fix the elastic body (300); A transmission device with improved energy efficiency, comprising a space (223) formed between the fixed ends (222) and accommodating one end of an elastic body (300).

5. In claim 1, A transmission device with improved energy efficiency in which the RPM changes within a gear ratio range of 1:1 to 1:2 for the first gear, 1:1 to 1:4 for the second gear, and 1:1 to 1:8 for the third gear when the above transmission devices are added one by one and the horizontal and vertical ratio of the above non-circular gear (120) is 2:1.

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