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KR-20260067282-A - IN-WHEEL MOTOR WITH HUBLESS STRUCTURE

KR20260067282AKR 20260067282 AKR20260067282 AKR 20260067282AKR-20260067282-A

Abstract

The present invention relates to an in-wheel motor with a hollow structure that can reduce the overall load of the motor, lower manufacturing costs, and further improve assembly by forming a housing part fixed to a moving means in a hollow shape and simplifying the internal structure by placing a resolver housing on the outer surface of the housing part.

Inventors

  • 시효석

Assignees

  • 시효석

Dates

Publication Date
20260512
Application Date
20250311

Claims (5)

  1. In the case of in-wheel motors, A housing part (100) having a hollow interior and fixed to the front and rear frames (2) of the moving means (1); A resolver housing (200) coupled to the outer surface of the first stator housing (110) of the housing part (100) so that the resolver rotor (210) rotates together with the first rotor housing (10) to measure and control the speed and position of the motor; A hollow in-wheel motor comprising a bearing (400) that is mounted on the outer surface of the housing portion (100) and allows the first rotor housing (10), the second rotor housing (20), the rotor cover (30), and the resolver rotor (210) of the resolver housing (200) to rotate on the outside of the housing portion (100).
  2. In claim 1, The above housing part (100) is, A first stator housing (110) through which the interior is penetrated; A second stator housing (120) that is in close contact with one side of the first stator housing (110) and coupled to each other; An in-wheel motor with a hollow structure comprising a fixing piece (140) formed on the outer side of the first stator housing (110) and the second stator housing (120) to which the frame (2) of the moving means (1) is fixed.
  3. In claim 1, The above resolver housing (200) is, A resolver rotor (210) that rotates while fixed to the first rotor housing (10) and rotor cover (30); A hollow in-wheel motor including a resolver stator (220) fixed to the outer surface of the first stator housing (110) of the housing part (100).
  4. In claim 3, An outer uneven surface (211) formed by radially protruding from the inner circumference of the above resolver rotor (210); An in-wheel motor with a hollow structure including an inner uneven surface (212) formed on the inner circumference of a resolver rotor (210) between the outer uneven surfaces (211) above.
  5. In claim 3, The above resolver stator (220) is, An in-wheel motor with a hollow structure formed within a 45° range relative to the center of the housing part (100).

Description

In-wheel motor with hollow structure The present invention relates to an in-wheel motor with a hollow structure. In-wheel motors are used in means of transportation that use electricity as a power source. For example, in-wheel motors can be applied to eco-friendly means of transportation such as electric vehicles and electric motorcycles. Conventional internal combustion engine or electric means of transportation utilized a drive system employing an engine, transmission, motor, and shaft. However, this method can result in power loss because power must be transmitted from the engine to the wheels. To prevent this power loss, in-wheel motors and in-wheel motor systems containing them (also known as “in-wheel units”) are gaining popularity. Since the drivetrain of the in-wheel motor system is positioned on the wheels, the design of the means of transportation is simplified and space utilization efficiency can be improved. Additionally, because individual control is possible for each in-wheel motor system, driving stability is good and power loss can be minimized. However, conventional in-wheel motors have a structure in which the inside of the wheel is blocked by a cover and the shaft transmitting driving force is fixed to the center of the wheel, which resulted in heavy weight and poor space utilization. FIG. 1 is a drawing in which a hollow-structured in-wheel motor according to one embodiment of the present invention is applied to a means of transportation. FIG. 2 is a perspective view of an in-wheel motor with a hollow structure according to an embodiment of the present invention. FIG. 3 is an exploded perspective view of an in-wheel motor with a hollow structure according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of an in-wheel motor with a hollow structure according to an embodiment of the present invention. Figure 5 is a cross-sectional view along line B-B' of Figure 4. FIG. 6 is an enlarged view showing the resolver rotor of the present invention. Figure 7 is a cross-sectional view along line C-C' of Figure 4. FIG. 8 is an enlarged view of the bearing of the present invention mounted. The following detailed description of the invention refers to the accompanying drawings, which illustrate specific embodiments in which the invention may be practiced. These embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. It should be understood that various embodiments of the invention are different but need not be mutually exclusive. For example, specific shapes, structures, and characteristics described herein may be implemented in other embodiments without departing from the spirit and scope of the invention in relation to one embodiment. It should also be understood that the location or arrangement of individual components within each disclosed embodiment may be changed without departing from the spirit and scope of the invention. Accordingly, the following detailed description is not intended to be limiting, and the scope of the invention is limited only by the appended claims, including all equivalents to those claimed therein, provided appropriately described. Similar reference numerals in the drawings refer to the same or similar functions across various aspects. Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings. First, FIG. 1 is a drawing showing a hollow-structured in-wheel motor according to an embodiment of the present invention applied to a means of transportation. FIG. 2 is a perspective view of a hollow-structured in-wheel motor according to an embodiment of the present invention. FIG. 3 is an exploded perspective view of a hollow-structured in-wheel motor according to an embodiment of the present invention. FIG. 4 is a cross-sectional view of a hollow-structured in-wheel motor according to an embodiment of the present invention. An in-wheel motor (A) with a hollow structure according to one embodiment of the present invention includes a housing part (100), a resolver housing (200), and a bearing (400). The above housing part (100) has a hollow part (100') that penetrates the interior, and the frame (2) of the moving means (1) can be fixed to the outside of one or both sides of the housing part (100). Even if the means of movement (1) is fixed to the housing part (100), there is no structure blocking the hollow part (100'). The housing portion (100) may include a first stator housing (110) and a second stator housing (120). The first stator housing (110) and the second stator housing (120) are positioned inside the wheel of the moving means (1) and fixed so as not to rotate. The first stator housing (110) is a cylindrical tube with an internal opening. A stator (13) is fixed to one side of the outer surface of the first stator housing (110), and a coil (14) can be wound around the stator (13). The above coil (14) can generate a magnetic fi