TW201628314A - Metal base of motor - Google Patents

Abstract

A metal base of motor is used for solving the problem of slope or distortion happening to the former metal base's plastic plank after injection molding. The metal base of motor has a metal board and a plastic plank. The metal board has a coupling part. The plastic plank combines with the coupling part of the metal board. The plastic plank has a shaft tube and a holding part. A spacing part forms between the shaft tube and the holding part. The shaft tube and the holding part are disconnected since the spacing part for promoting the convenience of injection molding to the plastic plank.

Description

Motor metal base

The present invention relates to a motor metal base, and more particularly to a motor metal base that can be used as a base of a motor or a fan frame of a cooling fan.

Referring to FIG. 1 , a conventional motor metal base 9 is disclosed. The motor metal base 9 includes a metal seat plate 91 and a plastic post 92 . The metal seat plate 91 is provided with a card engaging portion 911 in the center thereof; the plastic post 92 is coupled to the card engaging portion 911 by injection molding, wherein the plastic post 92 has a shaft tube portion 921 integrally joined during the injection molding process. And a supporting portion 922, one end of the shaft tube portion 921 and the supporting portion 922 are integrally coupled to the card engaging portion 911. Therefore, the conventional motor metal base 9 can be used as a base of a fan frame or a motor of the heat dissipating fan for combining a member such as a rotor 93 and a stator 94, and the support portion 922 of the plastic post 92 can be used for a circuit board. In combination with the circuit board 95, the circuit board 95 is electrically connected to the stator 94. The support portion 922 is configured to prevent the circuit board 95 from directly contacting the metal seat plate 91 to form a short circuit, thereby ensuring that the circuit board 95 can operate normally for inputting current to The stator 94 allows the stator 94 to drive the rotor 93 to rotate. Among them, the detailed structural composition and molding principle of integrally joining the plastic post to the metal seat plate by injection molding can be referred to the new patent of "Insulation Base Structure of Radiating Fan" of the Republic of China No. M337062.

The above-mentioned conventional motor metal base 9 has a problem in that since the shaft tube portion 921 and the support portion 922 of the plastic post 92 are integrally coupled, the thickness between the two is large, and therefore, by a mold When the plastic material is injection molded out of the shaft tube portion 921 and the support portion 922, The portion where the shaft tube portion 921 and the support portion 922 are connected to each other is likely to be contracted, and the shaft tube portion 921 may be inclined or deformed, and the dimensional precision of the shaft tube portion 921 after molding may be poor. When the shaft tube portion 921 is used to pivot the rotor 93, the rotation balance of the rotor 93 will be affected, so that the service life of the motor or the cooling fan is easily reduced, and even the motor or the cooling fan generates improper noise during operation.

The invention provides a motor metal base, which can effectively prevent the plastic pillar from being inclined or deformed when the plastic pillar is formed by injection molding.

The motor metal base of the present invention comprises a metal seat plate and a plastic support. The metal seat plate is provided with a joint portion; the plastic support post is coupled to the joint portion of the metal seat plate, and the plastic support portion includes a shaft tube portion and a support portion, and a gap portion is disposed between the shaft tube portion and the support portion. The spacer is for making the shaft tube portion and the support portion unconnected.

The joint portion includes a fitting hole provided at a center of the metal seat plate, and a plurality of through holes located at a periphery of the fitting hole, wherein the shaft tube portion is coupled to the fitting hole, and the support portion is coupled to the support portion Several through holes.

The inner edge of the fitting hole is provided with a plurality of posts, and the shaft tube portion integrally covers the plurality of posts.

The inner edge of at least one of the plurality of through holes is provided with at least one notch, and the support portion integrally covers the notch.

Wherein, the outer periphery of the metal seat plate is provided with a side wall portion, and the side wall portion is provided with an air inlet and an air outlet.

Wherein, the metal seat plate is provided with a plurality of air permeable holes.

The spacer is located between the fitting hole and the plurality of through holes.

The support portion of the plastic post is coupled to a circuit board, and the circuit board is provided with at least one electronic component, and the electronic component is received in the through hole.

It can be seen from the above that the motor metal base of the present invention can effectively prevent the shaft tube portion from being inclined or deformed during the injection molding process, so as to ensure that the rotation balance of the rotor pivotally connected to the shaft tube portion is not affected, so as to achieve the lifting motor. Or cooling fan life and reduce noise.

〔this invention〕

1‧‧‧metal seat plate

11‧‧‧Combination Department

111‧‧‧ fitting holes

112‧‧‧through hole

113‧‧‧ gap

114‧‧‧clamp

12‧‧‧ Side wall

121‧‧‧Air inlet

122‧‧‧air outlet

13‧‧‧ Ventilation holes

2‧‧‧Plastic pillar

21‧‧‧ shaft tube department

22‧‧‧Support

23‧‧‧Interval

3‧‧‧ Stator

4‧‧‧Rotor

5‧‧‧Circuit board

51‧‧‧Electronic components

[study]

9‧‧‧Motor metal base

91‧‧‧Metal seat plate

911‧‧‧Integrated Card Joint

92‧‧‧ plastic pillar

921‧‧‧ shaft tube department

922‧‧‧Support

93‧‧‧Rotor

94‧‧‧ Stator

95‧‧‧ boards

Fig. 1 is a sectional view showing a combination of a conventional motor metal base applied to a motor.

Fig. 2 is a perspective view showing the appearance of the motor metal base of the present invention.

Figure 3 is a top plan view of the motor metal base of the present invention.

Fig. 4 is a partially enlarged perspective view showing the metal base of the motor of the present invention.

Fig. 5 is a perspective view showing the metal seat plate of the motor metal base of the present invention.

Figure 6 is a cross-sectional view showing the assembly of the motor metal base of the present invention applied to a motor.

The above and other objects, features and advantages of the present invention will become more <RTIgt;

Referring to FIGS. 2 and 3, the motor metal base of the present invention comprises a metal seat plate 1 and a plastic support 2, and the plastic support 2 is coupled to the metal seat plate 1.

The metal seat plate 1 is provided with a joint portion 11 which is a positioning structure capable of joining the plastic pillars 2 in an injection molding manner without any detachment and jointing, for example, a fitting hole or a post. Etc., the invention is not limited.

The plastic post 2 is integrally joined to the joint portion 11 of the metal seat plate 1 by injection molding. The plastic post 2 is integrally combined with the injection molding principle of the metal seat plate 1 and can be understood by those skilled in the art. In addition, as shown in FIG. 4 , the plastic post 2 includes a shaft tube portion 21 and a support portion 22 . The shaft tube portion 21 and the support portion 22 have a spacing portion 23 between the spacer portions 23 . The shaft tube portion 21 and the support portion 22 are unconnected to facilitate molding of the plastic post 2 (see below for details).

Further, as shown in FIGS. 2, 5 and 6, the joint portion 11 may include a fitting hole 111 provided in the center of the metal seat plate 1 and a plurality of through holes located around the fitting hole 111. The shaft tube portion 21 is coupled to the fitting hole 111, and the support portion 22 is coupled to the plurality of through holes 112 so that the shaft tube portion 21 and the support portion 22 can be firmly coupled to the metal seat plate 1 without The spacer portion 23 is preferably located between the fitting hole 111 and the plurality of through holes 112 to more clearly distinguish the shaft tube portion 21 and the support portion 22 into two portions. The inner edge of at least one of the plurality of through holes 112 may be provided with at least one notch 113 for integrally covering the notch 113 during the molding process by the injection molding method. The support portion 22 can be effectively prevented from rotating arbitrarily to provide a better anti-rotation positioning effect of the support portion 22. Alternatively, the inner edge of the fitting hole 111 may further extend axially through a plurality of latches 114. The latches 114 are various card positioning structures that can be used for inserting and clamping the shaft tube portion 21, and the present invention does not. The plurality of posts 114 can be integrally covered during the molding process of the shaft tube portion 21 by injection molding, thereby effectively preventing the shaft tube portion 21 from rotating arbitrarily, and the shaft can also be provided. The tube portion 21 preferably has an anti-rotation positioning effect.

Moreover, as shown in FIGS. 2 and 5, the outer peripheral edge of the metal seat plate 1 may be provided with a side wall portion 12, and the side wall portion 12 is provided with an air inlet 121 and an air outlet 122; The metal base can be used as a fan frame for the cooling fan. The metal seat plate 1 can be additionally provided with a plurality of air venting holes 13 to provide a better flow guiding effect when the motor metal base of the present invention is used as a fan frame of a heat dissipation fan.

Referring to FIG. 6 , when the motor metal base of the present invention can be used as a motor base, the shaft tube portion 21 of the plastic pillar 2 can be combined with the stator 3 and the rotor 4 , and the support portion 22 of the plastic pillar 2 can be The circuit board 5 is electrically connected to the stator 3. The support portion 22 is configured to prevent the circuit board 5 from directly contacting the metal seat plate 1 to form a short circuit, thereby ensuring that the circuit board 5 can operate normally. An electric current is input to the stator 3, so that the stator 3 can drive the rotor 4 to rotate. Alternatively, when the outer wall portion of the metal seat plate 1 is provided with the side wall portion 12, As a fan frame of the cooling fan, the rotor 4 can be combined with a fan blade as a fan wheel for introducing airflow from the air inlet 121, and then being led out by the air outlet 122 to provide a heat dissipation function. In addition, the circuit board 5 is provided with at least one electronic component 51, which can be directly accommodated in the through hole 112 to prevent the electronic component 51 from occupying excess space. When the motor metal base of the present invention is a motor base or When the fan frame of the cooling fan is used, the axial height of the motor or the cooling fan can be effectively reduced.

The present invention is based on the above-described motor metal base, and is mainly provided with a 〝 spacer portion 23 between the shaft tube portion 21 and the support portion 22, and the shaft tube portion 21 and the support portion 22 are made by the spacer portion 23. The unconnected shape ensures that the shaft tube portion 21 and the support portion 22 are not connected to each other to cause poor injection molding quality. Therefore, when the shaft tube portion 21 and the support portion 22 are molded by the injection molding method, it is possible to effectively prevent the shaft tube portion 21 from being inclined or deformed, and to improve the dimensional precision of the plastic post 2 after molding.

In summary, the motor metal base of the present invention can effectively prevent the shaft tube portion 21 from being inclined or deformed during the injection molding process. When the shaft tube portion 21 is used to pivotally connect the rotor 4, the rotor 4 can be ensured. The rotation balance is not affected, so as to improve the service life of the motor or the cooling fan, and to avoid the improper noise generated by the motor or the cooling fan during operation.

While the invention has been described in connection with the preferred embodiments described above, it is not intended to limit the scope of the invention. The technical scope of the invention is protected, and therefore the scope of the invention is defined by the scope of the appended claims.

1‧‧‧metal seat plate

11‧‧‧Combination Department

111‧‧‧ fitting holes

112‧‧‧through hole

113‧‧‧ gap

12‧‧‧ Side wall

121‧‧‧Air inlet

122‧‧‧air outlet

13‧‧‧ Ventilation holes

2‧‧‧Plastic pillar

21‧‧‧ shaft tube department

22‧‧‧Support

23‧‧‧Interval

Claims (8)

A metal base for a motor, comprising: a metal seat plate, the metal seat plate is provided with a joint portion; and a plastic support block, the plastic support post is coupled to the joint portion of the metal seat plate, and the plastic support portion comprises a shaft tube portion and a support portion having a spacer portion between the shaft tube portion and the support portion for making the shaft tube portion and the support portion unconnected. The motor metal base according to claim 1, wherein the joint portion includes a fitting hole provided in a center of the metal seat plate, and a plurality of through holes located around the fitting hole, The shaft tube portion is coupled to the fitting hole, and the support portion is coupled to the plurality of through holes. The motor metal base according to claim 2, wherein the inner edge of the fitting hole is provided with a plurality of posts, and the shaft tube portion integrally covers the plurality of posts. The motor metal base of claim 2, wherein the inner edge of at least one of the plurality of through holes is provided with at least one notch, and the support portion integrally covers the notch. The motor metal base according to the first, second, third or fourth aspect of the invention, wherein the outer periphery of the metal seat plate is provided with a side wall portion, and the side wall portion is provided with an air inlet and an air outlet. The motor metal base of claim 5, wherein the metal seat plate is provided with a plurality of air permeable holes. The motor metal base of claim 2, 3 or 4, wherein the spacer is located between the fitting hole and the plurality of through holes. The motor metal base of claim 2, 3 or 4, wherein the support portion of the plastic post is coupled to a circuit board, the circuit board is provided with at least one electronic component, and the electronic component is accommodated in the above-mentioned In the hole.