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KR-20260063777-A - Multi-Stage Transmission Integrated Motor for Electric Mobility

KR20260063777AKR 20260063777 AKR20260063777 AKR 20260063777AKR-20260063777-A

Abstract

A multi-stage transmission integrated motor for electric mobility according to one embodiment of the present invention comprises: a motor part for rotating a drive wheel of electric mobility; a first-1 gear, a first-2 gear, and a first-3 gear that rotate in conjunction with a rotating shaft part of the motor part; a plurality of second-1 gears arranged to mesh at regular intervals along the circumference of the first-1 gear; a plurality of second-2 gears arranged to mesh at regular intervals along the circumference of the first-2 gear; a plurality of second-3 gears arranged to mesh at regular intervals along the circumference of the first-3 gear; a third gear connected to mesh along the circumference of the second-1 gear, the second-2 gear, and the second-3 gear; and a transmission cam that is coupled with the rotating shaft part and selectively combines the gear to rotate together with the rotating shaft part among the first-1 gear, the first-2 gear, and the first-3 gear with the rotating shaft part.

Inventors

  • 임창현
  • 허재협
  • 김민성

Assignees

  • 주식회사 엘엠솔루션

Dates

Publication Date
20260507
Application Date
20241031

Claims (6)

  1. In a motor for rotating the drive wheel of an electric mobility, Motor section; A first-1 gear, a first-2 gear, and a first-3 gear that rotate in conjunction with the rotating shaft portion of the motor portion; A plurality of 2-1 gears arranged to mesh at regular intervals along the circumference of the above 1-1 gear; A plurality of second-2 gears arranged to mesh at regular intervals along the circumference of the first-2 gears; A plurality of second- and third gears arranged to mesh at regular intervals along the circumference of the first- and third gears; A third gear connected to mesh along the circumference of the above-mentioned second-1 gear, second-2 gear, and second-3 gear; and A motor comprising a transmission cam that is coupled to the above-mentioned rotating shaft and selectively couples the gear to rotate together with the above-mentioned rotating shaft among the above-mentioned first-1 gear, first-2 gear, and first-3 gear, and the above-mentioned rotating shaft.
  2. In Article 1, A shift lever is mounted in the groove of the above-mentioned rotating shaft, and The above shift lever is connected to the above shift cam, and As the above-mentioned shift cam rotates, the above-mentioned shift lever connected to the above-mentioned shift cam moves in and out of the above-mentioned groove, and A motor in which, as the shift lever moves in and out, the shift lever is selectively coupled with at least one of the first-1 gear, first-2 gear, and first-3 gear and rotates together.
  3. In Article 2, The above-described transmission cam includes a shaft and a transmission rotating part connected to the shaft and coupled to a transmission chain, and The above-mentioned transmission chain is a motor that rotates the above-mentioned transmission rotating part.
  4. In Article 2, The above shift lever comprises first, second, and third shift levers, the mounting height of which changes sequentially according to the rotational direction of the rotating shaft, mounted in the groove, and On the inner surface of the above-mentioned shift cam, a shaft groove is formed at an angle according to the rotational direction of the above-mentioned shift cam, and First, second, and third protrusions are formed on each of the above first, second, and third shift levers, respectively, and As the above-mentioned transmission cam rotates, the first, second, and third protrusions are inserted into the shaft groove in sequence, and A motor in which the first, second, and third protrusions are inserted into the shaft groove in sequence, causing the first, second, and third latch portions of the transmission cam to mesh with the first-1 gear, first-2 gear, and first-3 gear, respectively, and rotate together with the first-1 gear, first-2 gear, and first-3 gear.
  5. In Paragraph 4, The above shift lever is, A main body portion formed in a rod shape on a groove portion of the above-mentioned rotating shaft portion and rotated with the longitudinal direction of the above-mentioned rotating shaft portion as the rotation axis; A protrusion formed protruding from the upper side of the main body and connected to the transmission cam; and It includes a latch portion that is formed protruding from the lower side of the main body portion and coupled with the first-1 gear, the first-2 gear, and the first-3 gear, and A motor in which, with respect to the rotation axis direction (Xc) of the main body, the direction (Xa) perpendicular to the protruding surface and the direction (Xb) perpendicular to the latch surface are different.
  6. In Article 1, It further includes a motor housing coupled to the third gear and coupled to the outer circumference of the third gear, When the third gear is rotated, the motor housing coupled with the third gear is rotated, and The motor housing is coupled to the hub of the wheel of the electric mobility, and The rotational force of the motor housing is transmitted to the wheel, the motor.

Description

Multi-Stage Transmission Integrated Motor for Electric Mobility Embodiments of the present invention relate to a multi-stage transmission integrated motor for electric mobility. Electric mobility refers to means of transportation including electric scooters, electric bicycles, electric kickboards, and other small electric means of transport. Electric mobility has recently been gaining popularity as a means of transportation in various fields. Motors used in electric mobility enable the driving of these vehicles. However, due to the driving characteristics of electric mobility, which are relatively smaller than automobiles, miniaturization, lightweighting, and high efficiency are critical for the motors used, given the limitations on vehicle size and weight. Generally, motors used in electric mobility operate by driving the motor through pedaling via a PAS (Pedal Assist System). Additionally, an internal Hall sensor measures the rotational speed of the pedal, and the motor is driven to assist pedaling when the rotational speed is below a preset speed, and the motor is stopped when the speed exceeds the preset speed. In addition, when climbing slopes using electric mobility, increasing the assistance intensity or level of the PAS system to boost motor output leads to a rapid increase in battery consumption, which causes a problem where the driving range of the electric mobility is significantly reduced. FIG. 1 is a perspective view of a motor according to one embodiment of the present invention. FIG. 2 is a partially exploded view of a motor according to one embodiment of the present invention. FIG. 3 is an exploded perspective view of a motor according to one embodiment of the present invention. FIG. 4 is an exploded perspective view of a gear part according to one embodiment of the present invention. FIG. 5(a) is a perspective view of a third gear according to one embodiment of the present invention, and FIG. 5(b) is a plan view. FIG. 6 is a perspective view showing a motor part and a rotating shaft part according to one embodiment of the present invention. FIG. 7 is a perspective view showing a transmission cam according to one embodiment of the present invention. FIG. 8 is a perspective view showing a rotating shaft and a transmission cam according to one embodiment of the present invention. FIG. 9 is a perspective view showing a rotating shaft portion according to one embodiment of the present invention. Figure 10 is a cross-section of AA in Figure 9. Figure 11 is a cross-section of the BB in Figure 9. FIG. 12 is a perspective view showing a shift lever according to one embodiment of the present invention. FIG. 13 is a conceptual diagram showing the rotation of a shift lever according to one embodiment of the present invention. FIG. 14 is a drawing showing a multi-stage transmission integrated motor for electric mobility according to the present embodiment mounted on a drive wheel of electric mobility. The present invention is capable of various modifications and may have various embodiments; specific embodiments are illustrated in the drawings and described in detail in the description of the invention. However, this is not intended to limit the present invention to specific embodiments, and it should be understood that the invention includes all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. In describing the present invention, the same identification numerals are used for identical components, even if they are illustrated in different embodiments. Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. When describing with reference to the drawings, identical or corresponding components are given the same reference numerals, and redundant descriptions thereof will be omitted. In the following embodiments, terms such as first, second, etc. are used not in a limiting sense, but for the purpose of distinguishing one component from another component. In the following examples, singular expressions include plural expressions unless the context clearly indicates otherwise. In the following embodiments, terms such as "include" or "have" mean that the features or components described in the specification are present, and do not preclude the possibility that one or more other features or components may be added. In the drawings, the size of components may be exaggerated or reduced for convenience of explanation. For example, the size and thickness of each component shown in the drawings are depicted arbitrarily for convenience of explanation, so the present invention is not necessarily limited to what is illustrated. In the following embodiments, the x-axis, y-axis, and z-axis are not limited to three axes in an orthogonal coordinate system and can be interpreted in a broader sense that includes them. For example, the x-axis, y-axis, and z-axis may be orthogonal to each other, but they may also