Method for producing motor structured to accommodate scraps

Abstract

The present invention provides a method for producing a motor structured to accommodate scraps, the motor comprising a housing, a housing drawing, a sensor board, a stator, a rotor, and a shaft. The housing is injection-molded to form a circular shoulder on which the stator is seated along the inner perimeter and a circular groove that continues along the inner perimeter of the shoulder, the housing being insert-injection-molded so that the inner surface of the housing drawing is exposed to above the shoulder of the housing, and the stator being cold-press-fitted onto the housing drawing to seat the former on the shoulder of the housing and the scraps generated due to friction with the housing drawing being accommodated in the groove.

Description

Method for manufacturing a motor having a scrap receiving structure

[0001] The present invention relates to a method for manufacturing a motor having a scrap receiving structure, and is a technology for a method for manufacturing a motor structure configured to receive and process scrap generated during the pressing process by pressing and joining a stator to a motor housing.

[0002] Conventionally, the stator is press-fitted into the motor's stator housing. To accommodate scrap generated by friction with the outer surface of the stator during press-fit fixation, multiple separate receiving grooves must be welded into the stator housing. This manufacturing process requires skilled technicians.

[0003] In addition, since the formed receiving grooves are welded to the stator housing at fixed intervals and have a limited size, the stator must be joined in a direction that matches the receiving grooves when press-fitted.

[0004] In the content of the Korean Patent No. 10-2066997 "Motor housing press-fit structure" showing the conventional technology, when a stator is press-fitted into the motor housing, a groove is formed to accommodate scrap generated from the stator. At this time, a separate metal stator housing must be manufactured and welded as a member to create a groove for accommodation, so the process itself is complicated and time-consuming, which has been a problem.

[0005] In addition, there was a problem in the past where a gap occurred between the stator housing and the stator due to a protrusion after assembly.

[0006] In order to solve the above problem, the present invention aims to provide a method for manufacturing a motor having a scrap receiving structure that provides a structure capable of receiving all generated scrap even when the stator is directly pressed into the motor housing regardless of the coupling direction.

[0007] In order to solve the above problems, the present invention provides a method for manufacturing a motor having a scrap receiving structure, which comprises a housing having an internal space, a housing drawing seated inside the housing and having a partially exposed inner surface, a sensor board installed inside the housing, a stator installed and fixed inside the housing, a rotor installed inside the stator inside the housing, and a shaft coupled to the rotor coupled to the housing, wherein the housing is injection-molded so as to have a circular step along an inner circumference on which the stator is seated, and a circular groove extending along the circumference of the step, and the inner surface of the housing drawing is exposed above the step of the housing and is integrally formed by insert injection, and the stator is cold-pressed into the housing drawing so as to be seated on the step of the housing, and scrap generated by friction with the housing drawing is accommodated in the groove.

[0008] The above stator is characterized in that it is formed in a polygonal shape protruding from the outer surface, and a scrap generating portion is formed so that scrap is formed when pressed by forming a corner portion with a curve.

[0009] The above stator is characterized in that a protrusion is formed in an upward direction along the upper surface periphery to prevent scrap generated from the scrap generating section from moving toward the inside of the stator.

[0010] The above stator is characterized in that it comprises a core formed in a circular shape including a plurality of teeth on the inside, a coil wound around the core, and a ring portion coupled to an outer surface of the core, wherein a groove portion is formed vertically on the outer surface of the ring portion, and a coupling protrusion is formed on the inside of the ring portion to fit into an outer groove formed on the outer surface of the core.

[0011] The following effects can be expected by the above solution.

[0012] A groove for accommodating scrap is formed throughout the motor housing, and the stator is pressed into the housing drawing formed in the motor housing to be joined, so assembly is possible by accommodating all scrap generated without having to align the direction.

[0013] In addition, the structure is simple and the manufacturing process is easy because the groove is formed in the housing itself rather than forming a structure to accommodate the groove in a separate housing drawing.

[0014] Figure 1 is a diagram showing the overall configuration of a motor having a scrap receiving structure according to an embodiment of the present invention.

[0015] FIG. 2 is a top view of the combination of a motor having a scrap receiving structure according to an embodiment of the present invention.

[0016] Figure 3 is a partially enlarged view of Figure 2.

[0017] Figure 4 is an isolated view of a housing and a housing drawing according to an embodiment of the present invention.

[0018] Figure 5 is a combination diagram of a housing and a housing drawing according to an embodiment of the present invention.

[0019] Fig. 6 is a cross-sectional view of a motor having a scrap receiving structure according to an embodiment of the present invention.

[0020] Figure 7 is an enlarged view of Figure 6.

[0021] Hereinafter, embodiments of the present invention will be described in detail with reference to the attached drawings. The following description and the accompanying drawings are provided to facilitate a general understanding of the present invention and are not intended to limit the technical scope of the present invention. Furthermore, detailed descriptions of well-known components and functions that may unnecessarily obscure the gist of the present invention will be omitted.

[0022] FIG. 1 is a diagram showing the overall configuration of a motor having a scrap receiving structure according to an embodiment of the present invention. FIG. 2 is a top view of the combination of a motor having a scrap receiving structure according to an embodiment of the present invention. FIG. 3 is a partially enlarged view of FIG. 2. FIG. 4 is an exploded view of a housing and a housing drawing according to an embodiment of the present invention. FIG. 5 is a diagram showing the combination of a housing and a housing drawing according to an embodiment of the present invention. FIG. 6 is a cross-sectional view of a motor having a scrap receiving structure according to an embodiment of the present invention, and FIG. 7 is an enlarged view of FIG. 6.

[0023] Referring to FIGS. 1 to 6, a method for manufacturing a motor having a scrap receiving structure according to the present invention is largely composed of a housing (100), a housing drawing (200), a sensor board (300), a stator (400), a rotor (500), and a shaft (600).

[0024] The above housing (100) is formed in a cylindrical shape with an internal space as the entire case of the motor, and a connector is connected to one side, and a sensor board (300), a stator (400), a rotor (500), and a shaft (600) can be installed. In addition, an electrical connection is made between the sensor board (300) and the stator (400) through the connector.

[0025] The above housing drawing (200) is installed along the inner circumference, which is the internal space of the housing (100). Here, the housing drawing (200) can be formed of a metal material.

[0026] The above sensor board (300) is installed in the central portion of the internal space of the housing (100).

[0027] The above stator (400) is installed and fixed in the housing (100). The stator (400) is a combined body in which a coil (440) is wound around a core (420) and the outside is surrounded by a ring portion (460), and the magnetic field generated by the coil of the stator (400) can rotate the rotor (500) and the shaft (600).

[0028] The above rotor (500) is installed inside the stator (400) inside the housing (100), and the shaft (600) is coupled with the rotor (500) coupled to the housing (100).

[0029] Referring to FIGS. 4 to 7, the present invention is characterized in that a circular step (120) is formed inwardly at a certain height along the inner circumference of the housing (100) so that the stator (400) is installed therein, and a circular groove (140) is formed along the circumference of the step (120) so that scrap generated by friction when the stator (400) is pressed into the housing drawing (200) is received.

[0030] Here, the stator (400) is characterized in that it is formed in a polygonal shape protruding from the outer surface, and a scrap generating portion (462) is formed at the corner portion to form scrap during cold pressing. More specifically, the scrap generating portion (462) is formed in the ring portion (460) of the stator (400).

[0031] It is preferable that the above scrap generating section (462) be formed in a plurality of pieces so that they protrude laterally in a mutually symmetrical manner so that pressure is applied evenly during pressing.

[0032] In addition, a groove (464) is formed vertically on the outer surface of the ring portion (460) so that it can be used as a guide groove for coupling or as a passage for inserting a tool when later removing. In addition, a coupling protrusion (466) is formed on the inner side so that it fits into the outer groove formed on the core (420).

[0033] The stator (400) is characterized in that a protrusion is formed upward along the upper surface periphery to prevent scrap generated from the scrap generating unit (462) from moving inward on the upper surface of the stator (400).

[0034] Meanwhile, the housing drawing (200) is formed integrally by insert injection so that only a portion is exposed along the inner surface of the housing drawing (200) above the step (120) of the housing (100), so that when the stator (400) is pressed in, the ring portion (460) of the stator (400) rubs against the exposed inner wall of the housing drawing (200) and is pressed in, and the scrap is received in the groove (140) directly below, thereby settling on the step (120).

[0035] In addition, the inner wall surface of the housing drawing (200) may be inclined inwardly as it goes downward, so that the inner diameter gradually increases. This facilitates the coupling by increasing the initial friction when combined with the stator (400) and gradually decreasing the friction as the coupling deepens, and can also stably accommodate the increase in scrap generated due to friction as it goes downward.

[0036] As described above, it can be seen that the present invention is based on the basic technical idea of ​​a method for manufacturing a motor having a scrap receiving structure. It is obvious that many other modifications are possible for those skilled in the art within the scope of the basic idea of ​​the present invention.

Claims

1. A motor having a scrap receiving section, which includes a housing having an internal space, a housing drawing that is installed inside the housing and has a partially exposed inner surface, a sensor board installed inside the housing, a stator installed and fixed inside the housing, a rotor installed inside the stator inside the housing, and a shaft coupled with the rotor coupled to the housing, The housing is injection-molded so that a circular step is formed along the inner circumference of the housing on which the stator is mounted, and a circular groove is formed along the circumference of the step, and the inner surface of the housing drawing is exposed through insert injection above the step of the housing to form an integral part. A method for manufacturing a motor having a scrap receiving structure, characterized in that the stator is cold pressed into the housing drawing to be seated on the step of the housing, and scrap generated by friction with the housing drawing is received in the groove.

2. In paragraph 1, The above stator, A method for manufacturing a motor having a scrap receiving structure, characterized in that a scrap generating portion is formed in a polygonal shape protruding from an outer surface and having a curved corner portion so that scrap is formed when pressed.

3. In paragraph 2, In the above stator, A method for manufacturing a motor having a scrap receiving structure, characterized in that a protrusion is formed in an upward direction along the upper surface periphery to prevent scrap generated from the scrap generating section from moving toward the inside of the stator.

4. In paragraph 1, The above stator, A core formed in a circular shape including a plurality of teeth on the inside, A coil wound around the above core, It consists of a ring portion joined to the outer surface of the above core, A method for manufacturing a motor having a scrap receiving structure, characterized in that a groove is formed vertically on the outer surface of the ring portion, and a coupling projection is formed on the inner surface of the ring portion to fit into an outer groove formed on the outer surface of the core.

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