KR102345903B1 - Motor - Google Patents

Abstract

An embodiment of the present invention relates to a fastening structure of a motor, comprising a stator core in which a coil is wound on an outer circumferential surface, and a stator assay having a hollow center, a rotor assay spaced apart from the center of the stator assay, and It includes a housing having a rotating shaft passing through the center and an accommodation space for accommodating the stator assembly and the rotor assembly therein, wherein the housing has an open lower surface and an upper surface and a side surface are implemented in an integrated structure, so that the stator To provide a motor for the step actuator in which the receiving space portion of the assay is provided.

Description

motor {MOTOR}

An embodiment of the present invention relates to a fastening structure of a motor.

In general, a step actuator used in a headlamp for an automobile uses a motor unit, which is a stepping motor, as a driving source, a pinion gear is shaft-coupled to a rotation shaft of the motor unit, a gear unit is coupled to the pinion gear, and the output shaft is formed to protrude from the rotation center of the gear unit. Thus, it has a structure that transmits the torque of the motor unit.

As the main components of such a motor, a case for accommodating the stator and the rotor is provided, and in this case, the stator, the rotor, and the case are assembled and fixed by press-fitting, welding, and thermal fusion between the parts when assembling the case. In particular, since the housing accommodating the stator is implemented as a separate structure, welding is required at least twice or more, and even when the stator is accommodated in the housing and assembled, it becomes difficult to implement a motor of reliable quality due to assembly tolerances.

The present invention has been devised to solve the above problem, and in particular, the structure of the housing accommodating the stator is implemented as a structure in which the upper surface and the side are integrally implemented, thereby eliminating the welding process at the time of assembling the housing, and assembling with the stator It is possible to realize a motor structure that simplifies the assembly process and reduces man-hours by enabling it to be seated only by a simple insertion process without a separate press-fitting or welding process.

As a means for solving the above problems, in an embodiment of the present invention, it includes a stator core in which a coil is wound on an outer circumferential surface, and a stator assay having a hollow center, and a rotor assay spaced apart from the center of the stator assay and a housing having a rotating shaft passing through the center and an accommodation space for accommodating the stator assembly and the rotor assembly therein, wherein the housing has an open lower surface and an upper surface and side portions are implemented in an integrated structure, To provide a motor for the step actuator in which the receiving space portion of the stator assay is provided.

According to an embodiment of the present invention, the structure of the housing accommodating the stator is implemented as a structure in which the upper surface and the side are integrally implemented, thereby eliminating the welding process at the time of assembling the housing. It has the effect of simplifying the assembly process and reducing man-hours by allowing it to be seated only with a simple insertion process without a process.

In particular, by implementing a bearing assembly groove for supporting the shaft system inside the upper surface of the integrated housing, the coaxiality of the shaft system can be managed as a single unit, thereby reducing the accumulated tolerance due to the existing assembly process.

1 is a perspective view and an exploded view for explaining the structure of a motor for a step actuator according to an embodiment of the present invention.
Figure 2 is an exploded view for explaining the structure of the stator assay (S) in Figure 1.
3 is a conceptual diagram illustrating a housing structure applied to a motor for a step actuator according to an embodiment of the present invention.
4 is a conceptual diagram illustrating a structure for mounting a motor for a step actuator to an external case according to an embodiment of the present invention.

Hereinafter, the configuration and operation according to the present invention will be described in detail with reference to the accompanying drawings. In the description with reference to the accompanying drawings, the same components are given the same reference, regardless of the reference numerals, and a redundant description thereof will be omitted. Terms such as first, second, etc. may be used to describe various elements, but the elements should not be limited by the terms. The above terms are used only for the purpose of distinguishing one component from another.

1 is a perspective view and an exploded view for explaining the structure of a motor for a step actuator (hereinafter, referred to as a 'motor') according to an embodiment of the present invention. Figure 2 is an exploded view for explaining the structure of the stator assay (S) in Figure 1.

1 and 2, the motor according to the embodiment of the present invention is provided with a housing 30 accommodating a stator and a rotor therein, and a stator core 34 on which a coil is wound inside the housing 30. ) is provided. In addition, the housing is manufactured by dividing the cover part 31 , the upper housing 32 , and the lower housing 33 , and after accommodating the stator core 34 therein, it is assembled, the cover part 31 and the upper housing (32), the mutual interface of the lower housing 33 is welded through welding. The central portion of the stator core 34 has an empty structure, and the rotor 40 and the rotation shaft 45 passing therethrough are disposed. In addition, the process of press-fitting the stator into the housing 30 and the process of welding and binding the housing 30 itself act as factors that increase the process cost and time, and after joining by welding and press-fitting , in order to always preserve the same coaxial quality and bonding force, additional costs are incurred due to separate inspection and management for coaxial preservation after assembly.

Accordingly, in the structure of the motor according to the embodiment of the present invention, it is possible to solve this problem by implementing the structure of the novel housing having the structure as shown in FIG. 3 .

Referring to Figure 3, the housing 130 for accommodating the stator assay (S) according to the embodiment of the present invention has an open lower surface portion and the upper surface portion 131 and the side portion 132 are implemented in an integrated structure to form the stator air It is implemented in a structure in which the accommodation space part of Say can be provided. Furthermore, a side opening (C) in which the side protruding pins 36 of the stator assembly are disposed may be provided in the side portion 132 portion. As shown in FIG. 3 , the side opening (C) is opened from the end of the side part toward the upper surface, and the height of the side opening may be implemented to be less than the height (B) of the side part. That is, by implementing a structure in which a side part (hereinafter, referred to as a 'remaining side part (D)') in which the side opening is not implemented is present, structural stability can be secured.

Furthermore, in the central region of the upper surface of the housing 130, the bearing accommodating groove 133 having a structure that is concave and protrudes in the outward direction can be implemented, so that the coaxiality of the shaft system can be managed as a single unit size. It is possible to reduce the accumulated tolerance due to the assembly process.

The housing 130 according to the embodiment of the present invention having such a structure is implemented as an integrated structure. Unlike the housing of FIG. 2 , the welding process for the housing is reduced at least twice or more, so the assembly process is very simple. It is possible to reduce the material cost and process cost required for the press-fitting process and welding process applied during the assembly process.

In particular, the right side view of FIG. 3 shows a coupling view of the housing 130 and the stator 34 . This can be implemented as a simple assembly process of simply inserting the stator into the housing, thereby increasing the convenience of assembly. Furthermore, the stator assay interpolated into the housing shakes or detaches so that the outer circumferential surface 35a of the lower portion of the stator core of the stator assay and the inner surface 130a of the housing are bound in a contacting structure (X). to be able to solve the problem. In particular, in order to secure the stability of the binding structure, it is preferable that the inner diameter of the housing be formed to be less than or equal to the outer diameter of the outermost shell of the stator assembly.

Figure 4 shows the shape of the outer case member 120 to which the stator assay (S) according to the embodiment of the present invention according to Figure 3 is coupled.

Referring to Figure 4, the case member 120, as shown, implements an accommodation space therein so that the stator assay (S) can be coupled to an interpolated structure, the shape of which is that the upper part is opened. It is a structure, and the lower part and the side are implemented in a sealed structure. sure. In this case, the lower portion of the case member may be implemented with a hole to which the rotation shaft is coupled.

In particular, as shown in FIG. 4 , the case member 130 enables the partition wall portion 121 having a structure in which an opening region 121a to be opened at the side is provided. That is, in the case member, the partition wall portion may be implemented in a region corresponding to the side opening of the housing on the side of the case member.

Specifically, as shown in FIG. 4 , the opening area 121a is disposed in an area corresponding to the side opening of the housing 130 when the stator assay S is interpolated, and the remaining side portion when combined (D) is exposed, and the side openings can be coupled to each other in a closed structure by the partition wall part 121 . Such a closed coupling structure makes it possible to prevent foreign substances from being introduced between the case member 130 and the stator assembly (S).

Furthermore, the partition wall portion 121 has an opening larger than the height of the remaining side surface portion D at the upper end of the side opening portion so that the remaining side surface portion D of the housing 130 is exposed when coupled. It is possible to facilitate coupling in a structure in which the side protruding pins 36 of the stator assembly are fitted into the seating groove provided at the upper end of the part.

The structure of the housing of the stator assay applied to the motor according to the embodiment of the present invention described above is implemented as an integrated structure, and the stator inserted therein can be fixed by binding and fixed by simple assembly, thereby improving fairness. , even when assembling with an external case, it is possible to implement a customized assembly structure by implementing a bulkhead portion and a seating groove with a main configuration corresponding to the stator assay coupled to the housing of this embodiment. That is, the structure of the housing accommodating the stator is implemented as a structure in which the upper surface and the side are integrally implemented to eliminate the welding process at the time of assembling the housing. By making it possible to seat, it is possible to simplify the assembly process and reduce the man-hours.

In the detailed description of the present invention as described above, specific embodiments have been described. However, various modifications are possible without departing from the scope of the present invention. The technical spirit of the present invention should not be limited to the described embodiments of the present invention and should be defined by the claims as well as the claims and equivalents.

30: housing
31: cover part
32: upper housing
33: lower housing
34: stator core
36: side protrusion pins
40: rotor
45: axis of rotation
120: case member
121: bulkhead part
130: housing
131: upper surface
132: side part
D: Residual side part
S: stator assay

Claims (10)

a stator comprising a stator core in which a coil is wound on an outer circumferential surface, and having a hollow center;
a rotor spaced apart from the center of the stator;
a rotating shaft passing through the center;
a housing having an accommodation space accommodating the stator and the rotor therein; and
a case member into which a housing for accommodating the stator is inserted; includes,
The housing is
The lower surface portion is opened and the upper surface portion and the side portion are implemented in an integrated structure to provide a receiving space portion of the stator,
The case member has a structure in which an upper part is opened, and a side part and a lower part are sealed,
The case member may include a partition wall portion disposed in a region corresponding to the side opening of the housing among side portions of the case member.
The method according to claim 1,
The housing is
A motor having a structure having a side opening in which a side protruding pin of the stator is disposed on the side portion.
3. The method according to claim 2,
The side opening is
It is opened from the end of the side part in the direction of the upper surface part,
The height of the side opening is implemented to be less than the height of the side part of the motor.
4. The method according to claim 3,
A motor provided with a bearing receiving groove recessed in an outward direction in a central region of the upper surface portion.
4. The method according to claim 3,
A motor coupled to a structure in which an outer peripheral surface of a lower portion of the stator core of the stator and an inner surface of the housing contact each other.
6. The method of claim 5,
The inner diameter of the housing is formed to be less than or equal to the outer diameter of the outermost of the stator.
delete delete The method according to claim 1,
The partition wall portion,
A motor having an opening greater than the height of the remaining side portion of the upper end of the side opening.
10. The method of claim 9,
A motor in which a seating groove of a side protruding pin of the stator is provided at an upper end of the partition wall.

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