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KR-20260067233-A - Cover device for BLDC motor, manufacturing method thereof and BLDC motor including it

KR20260067233AKR 20260067233 AKR20260067233 AKR 20260067233AKR-20260067233-A

Abstract

A cover device for a brushless motor according to the present invention is a device for supplying current to a brushless motor, comprising: a first cover member that wraps and fixes a plurality of first terminal members arranged in parallel in an embedded manner; and a second cover member that wraps and fixes a plurality of second terminal members arranged in an annular manner on a plane perpendicular to the longitudinal direction of the first terminal members, each of which is electrically connected to the first terminal members, in an embedded manner; wherein both ends of the first terminal members are arranged to protrude from the first cover member, and the second terminal members are provided with a connecting portion that wraps and fixes one end of the first terminal members.

Inventors

  • 장재준

Assignees

  • 디와이오토 주식회사

Dates

Publication Date
20260512
Application Date
20241105

Claims (8)

  1. As a device for supplying current to a brushless motor, A first cover member that wraps and fixes a plurality of first terminal members arranged side by side in an embedded form; and A second cover member that is electrically connected to each of the first terminal members and wraps and fixes a plurality of second terminal members arranged annularly on a plane perpendicular to the longitudinal direction of the first terminal member in an embedded form; Both ends of the first terminal member are arranged to protrude from the first cover member, and A cover device for a brushless motor, characterized in that the second terminal member has a connecting portion that secures one end of the first terminal member in a manner that wraps around it.
  2. In paragraph 1, A cover device for a brushless motor characterized in that the above-mentioned connecting part is a "U"-shaped structure.
  3. In paragraph 1, The first terminal member and the first cover member are joined by an insert injection molding method, A cover device for a brushless motor characterized in that the second terminal member and the second cover member are joined by an insert injection method.
  4. In paragraph 1, A cover device for a brushless motor characterized in that the connection between the first terminal member and the second terminal member includes welding.
  5. In paragraph 1, A cover device for a brushless motor characterized in that the connection between the first terminal member and the second terminal member is sealed with UV adhesive.
  6. In paragraph 1, The first cover member is provided with a cantilever-shaped elastic hook, and A cover device for a brushless motor, characterized in that the elastic hook is configured to engage with a catch provided on the second cover member so that the first cover member is detached from the second cover member.
  7. A method for manufacturing a cover device for a brushless motor according to any one of claims 1 to 6, A first cover member manufacturing step of insert injection molding the first cover member to wrap and fix the first terminal member in an embedded form; A second cover member manufacturing step of insert injection molding the second cover member to wrap and fix the second terminal member in an embedded form; An assembly step performed after the first cover member manufacturing step and the second cover member manufacturing step, wherein the first cover member and the second cover member are assembled; and A method for manufacturing a cover device for a brushless motor, characterized by including a sealing step performed after the assembly step above, wherein a UV adhesive is applied to the connection portion between the first terminal member and the second terminal member.
  8. A brushless motor device including a cover device according to any one of paragraphs 1 to 6.

Description

Cover device for a brushless motor, manufacturing method thereof and BLDC motor including it The present invention relates to a cover device for a brushless motor, and more specifically, to a cover device including a terminal that supplies three-phase current to a BLDC motor used as a braking motor for a vehicle. Generally, brake systems generate pressure in the master cylinder to amplify the force acting on the brakes, providing pressure to modules requiring braking. A hollow shaft motor is used as the device to generate pressure in the master cylinder. The hollow shaft motor utilizes a principle in which a hollow shaft is rotated, and as a screw shaft inside the hollow shaft rotates together with the hollow shaft, it converts this into linear motion for a ball nut (piston). The linear motion of the ball nut acts to actuate the piston, generating or removing the necessary pressure within the master cylinder. These hollow shaft motors are used as braking motor devices for vehicles. Three-phase BLDC motors are used for braking motors to output a large force. The braking motor is equipped with a cover device to supply current to the motor's stator from the outside. An example of such a braking motor is disclosed in Korean Registered Patent No. 10-2155450. However, as shown in FIG. 1, the power supply cover device for a conventional braking motor has three-phase terminals combined inside a plurality of synthetic resin parts in an insert injection structure. The three-phase terminal consists of a vertical section (1) into which current is introduced and a horizontal section (2) into which current is distributed. The three-phase terminal has the problem that it is difficult to manufacture due to the complex shape of the vertical section (1) and the horizontal section (2), and also that the end position of the three-phase terminal changes due to the pressure generated during the injection of synthetic resin in the insert injection process, making it difficult to manage tolerances and maintain consistent quality. FIG. 1 is a drawing illustrating the problems of a conventional cover device for a brushless motor. FIG. 2 is a perspective view of a brushless motor device according to the present invention. Figure 3 is a drawing showing the cross-sectional structure of the brushless motor device illustrated in Figure 2. Figure 4 is a drawing showing the three-dimensional structure of the cover device illustrated in Figure 3. Figure 5 is an exploded perspective view of the cover device shown in Figure 3. Figure 6 is a cross-sectional view along line VI-VI shown in Figure 4. Figure 7 is an enlarged view of the "A" portion shown in Figure 4. FIG. 8 is a drawing showing the structure of the connection portion between the first terminal member and the second terminal member of the present invention. FIG. 9 is a drawing showing the manufacturing process of a cover device according to the present invention. Embodiments of the present invention are described below with reference to the attached drawings so that those skilled in the art can easily implement them. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in describing preferred embodiments of the present invention in detail, specific descriptions of related known functions or configurations are omitted if it is determined that such detailed descriptions would unnecessarily obscure the essence of the present invention. Additionally, the same reference numerals are used throughout the drawings for parts having similar functions and operations. The term 'comprising' a component means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of additional components. Specifically, terms such as "comprising" or "having" are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof. Singular expressions include plural expressions unless the context clearly indicates otherwise. Additionally, the shapes and sizes of elements in drawings may be exaggerated for clearer explanation. FIG. 2 is a perspective view of a brushless motor device according to the present invention. FIG. 3 is a drawing showing the longitudinal cross-sectional structure of the brushless motor device illustrated in FIG. 2. FIG. 4 is a drawing showing the three-dimensional structure of the cover device illustrated in FIG. 3. FIG. 5 is an exploded perspective view of the cover device illustrated in FIG. 3. FIG. 6 is a cross-sectional view along line VI-VI illustrated in FIG. 4. FIG. 7 is an enlarged view of the "A" portion illustrated in FIG. 4. FIG. 8 is a drawing showing the structure of the connection