CN101826766B - Inner rotor motor - Google Patents

Abstract

An inner rotor motor includes a housing, a stator, a rotor and a bearing seat. The stator is accommodated in an assembly space of the shell seat, and the rotor is rotatably combined with the shell seat by a bearing and penetrates through a through hole of the stator. The bearing seat is arranged at an assembling opening at the bottom of the assembling space in an aligning way, the bearing seat at least comprises a seat body, two ends of the seat body are respectively provided with a first containing groove and a second containing groove, and a stopping part is formed between the first containing groove and the second containing groove by the seat body. Therefore, the bearing, the circuit board and other motor components can be placed into the first containing groove and the second containing groove through the two opposite ends of the base body, and the assembling convenience is further improved.

Description

inner rotor motor

technical field

The invention relates to an inner rotor motor, in particular to an inner rotor motor assembled with a bearing seat.

Background technique

The bottom of the existing inner rotor motor 8 is basically assembled with a bearing seat 9, as shown in FIG. The housing base 81 has a receiving space 810, a top opening 811 and a bottom opening 812, the top opening 811 and the bottom opening 812 communicate with the top and bottom of the receiving space 810 respectively; the stator 82 is arranged in the receiving space In 810, the stator 82 has a perforation 821, and the openings at both ends of the perforation 821 are connected to the top opening 811 and the bottom opening 812; The rotating shaft 831 is coupled to the casing 81 through the top opening 811 and is received in the through hole 821 of the stator 82 .

Please refer to FIG. 2 , the bearing seat 9 is correspondingly assembled in the bottom opening 812 of the housing base 81 , the bearing housing 9 includes a base 91 and a bottom plate 92 , and the base 91 is aligned and assembled on the housing base 81 . The bottom opening 812, and the seat body 91 is provided with a first container 911, a second container 912 and several through holes 913, the first container 911 is formed on one side of the second container 912, and the The first container 911 communicates with the second container 912, wherein the inner diameter of the first container 911 is smaller than the inner diameter of the second container 912, the first container 911 is used to accommodate the bearing 84, and the The second container 912 is used to accommodate a circuit board 85; in addition, the first container 911 and the second container 912 respectively form an opening 914, 915 at the top and bottom of the base 91; One end of 831 extends into the first container 911 through the opening 914, and is combined with the bearing 84 housed in the first container 911; each of the through holes 913 is formed on the top of the seat 91, And communicate with the second container 912, so that the circuit of the stator 82 enters the second container 912 through the through hole 913, and is electrically connected with the circuit board 85; Opening 915 at the bottom of 91.

Generally speaking, in order to prevent the bearing 84 in the first cavity 911 from falling into the through hole 821 of the stator 82, the opening 914 at the top of the seat body 91 shrinks to form a shoulder 916, and fits a Buckle piece 86 further restricts this bearing 84 to be positioned in this first accommodating groove 911; Yet, because the setting of this shoulder 916 has narrowed the aperture of this opening 914, when forcing this bearing 84 and circuit board 85 to carry out aforementioned assembling procedure, The first container 911 and the second container 912 can only be entered sequentially through the opening 915 at the bottom of the base body 91 . In addition, each of the through holes 913 is disposed on the top of the base body 91 , so that the end of the circuit needs to pass through the through holes 913 to enter the second cavity 912 , causing inconvenience in assembly.

Along with the trend of miniaturization of motor size, the size of the existing inner rotor motor 8 and the bearing seat 9 is bound to be reduced accordingly. In addition, the size of the first containing groove 911 is just a small space for accommodating the bearing 84. As a result, it is not easy to install the buckle 86 on one end of the rotating shaft 831 in the first cavity 911 in actual assembly, which increases the difficulty in motor assembly. For the above reasons, there is indeed a need to improve the existing inner rotor type motor.

Contents of the invention

The present invention provides an inner rotor motor, and the main purpose of the invention is to improve the convenience of assembling the whole motor.

In order to achieve the aforementioned object of the invention, the technical means used in the present invention and the effects that can be achieved by means of the technical means include:

An inner rotor motor includes a casing, a stator, a rotor and a bearing seat. The casing has an assembly space, the stator is accommodated in the assembly space of the casing, and the rotor is rotatably combined with the casing by a bearing, and is passed through a through hole of the stator. The bearing seat is arranged in an assembling port at the bottom of the assembly space, and the bearing seat at least includes a base, and the two ends of the base are respectively provided with a first container and a second container, and the seat is in the A stop portion is formed between the first container and the second container, and the first container and the second container are respectively formed with an opening at two ends of the seat body.

The beneficial effect of the present invention is: the seat body forms a stopper between the first container and the second container, so that the motor components such as the bearing and the circuit board can be positioned through the opposite two ends of the seat body. into the first container and the second container, and complete the positioning assembly process, thereby simplifying the assembly process and improving the convenience of assembly. The seat body is provided with several wire grooves, each wire groove is arranged on the side wall of the seat body, and the end of each wire groove is respectively provided with a catch portion, and each wire groove and each catch portion Both are connected to the second storage slot, so that the circuit of the stator can enter the second storage slot more easily through the side wall of the seat body, thereby improving the convenience of assembly.

Description of drawings

Figure 1: An exploded perspective view of the existing bearing housing and inner rotor motor.

Figure 2: A cross-sectional view of an existing bearing seat combined with an inner rotor motor.

Fig. 3: An exploded perspective view of a preferred embodiment of the inner rotor motor of the present invention.

Fig. 4: An assembled sectional view of a preferred embodiment of the inner rotor motor of the present invention.

Fig. 5a: Partial cross-section and schematic diagram of the bearing housing of the inner rotor motor of the present invention before assembly.

Fig. 5b: Partial cross-section and schematic diagram of the assembled bearing housing of the inner rotor motor of the present invention.

Fig. 6: Partial enlarged and top view of the bearing seat of the inner rotor motor of the present invention.

Description of main component symbols:

1 Shell base 11 Outer shell 110 Accommodating space 12 Inner shell

120 Assembly space 121 Shaft hole 122 Assembly port 2 Stator

21 Perforation 3 Rotor 31 Rotation shaft 4 Bearing seat

41 seat body 411 first storage slot 412 second storage slot 413 stopper

414 Trunking 415 Locking part 416 First positioning part 417 Second positioning part

42 Bottom plate 421 Shoulder 422 Pressing part 5 Bearing

6 circuit board a support ring b wear plate 8 inner rotor motor

81 shell base 810 accommodating space 811 top opening 812 bottom opening

82 Stator 821 Perforation 83 Rotor 831 Rotation shaft

84 Bearing 85 Circuit board 86 Buckle 9 Bearing seat

91 seat body 911 first storage tank 912 second storage tank 913 through hole

914 Opening 915 Opening 916 Shoulder 92 Floor

Detailed ways

In order to make the above-mentioned and other objects, features and advantages of the present invention more comprehensible, the preferred embodiments of the present invention are specifically cited below, together with the accompanying drawings, and are described in detail as follows:

Please refer to Fig. 3, the inner rotor motor of the preferred embodiment of the present invention includes a housing 1, a stator 2, a rotor 3 and a bearing housing 4, the stator 2 and the rotor 3 are housed in the housing 1, the bearing seat 4 is arranged on the bottom of the housing seat 1 in alignment.

In more detail, the shell base 1 is composed of an outer shell 11 and an inner shell 12, the outer shell 11 has an accommodating space 110, the inner shell 12 is arranged in the accommodating space 110; The shell 12 is a hollow shell, which has an assembly space 120, a shaft hole 121 and an assembly opening 122, and the shaft hole 121 and the assembly opening 122 communicate with the top and bottom of the assembly space 120 respectively; the stator 2 is provided with In the assembly space 120, the stator 2 has a through hole 21, and the openings at both ends of the through hole 21 are aligned and communicated with the shaft hole 121 and the assembly port 122 of the inner casing 12; shaft 31, and the rotating shaft 31 is rotatably set in the through hole 21 by using the bearing 5.

Please refer to Fig. 3 and Fig. 4, the bearing seat 4 of the preferred embodiment of the present invention includes a base 41 and a bottom plate 42; Blocking portion 413, several wire grooves 414, several locking portions 415, a first positioning portion 416 and a second positioning portion 417; the first receiving groove 411 is recessed at one end of the seat body 41 (in this embodiment This end is the top of the seat body 41), and forms an opening relative to the top end of the seat body 41, and the aperture of the opening is greater than or equal to the outer diameter of the bearing 5; The other end (the other end in this embodiment is the bottom end of the seat body 41 ) is located between the top and the side wall of the seat body 41 , and the second storage tank 412 forms an opening relative to the bottom end of the seat body 41 ; A support ring a is preferably provided in the first container 411, the support ring a is made of high mechanical strength metal material (for example: iron, copper or steel, etc.), the support ring a is attached to the The inner wall surface of the first container 411 is used to enhance the structural strength of the first container 411; the stopper 413 is arranged between the first container 411 and the second container 412, to The slot 411 and the second storage slot 412 are separated.

Furthermore, each of the wire grooves 414 is arranged on the side wall of the base body 41 respectively, and each of the locking parts 415 is respectively formed at the end of each of the wire grooves 414, and each of the wire grooves 414 and each of the locking parts 415 are connected to the second groove 412; the first positioning part 416 is formed on the outer wall of the side wall of the seat 41, the second positioning part 417 is arranged on the inner wall of the side wall of the seat 41, and the first positioning part 416 The second positioning portion 417 is adjacent to the opening of the second container 412 ; in addition, the first positioning portion 416 and the second positioning portion 417 of this embodiment are both selected as a stepped positioning structure. The bottom plate 42 is provided with a shoulder 421 and a plurality of pressing portions 422 , the shoulder 421 is disposed around the outer periphery of the bottom plate 42 , and the pressing portion 422 is bendably disposed at the center of the bottom plate 42 .

Please refer to FIG. 5a and FIG. 5b. In simple terms, when assembling the components of the inner rotor motor of the present invention, the stator 2 is inserted into the assembly space 120 of the inner casing 12, and the rotating shaft 31 of the rotor 3 The shaft hole 121 is rotatably disposed behind the through hole 21 of the stator 2 , and then the bearing seat 4 is aligned and combined with the assembly opening 122 of the inner casing 12 .

More specifically, during the process of combining the bearing seat 4 with the assembly port 122, the stopper is directly formed between the first cavity 411 and the second cavity 412 by means of the seat body 41 of the bearing seat 4 part 413, so that the bearing 5 to be combined with the end of the rotating shaft 31 can be directly inserted into and positioned in the first cavity 411 through the opening of the first cavity 411; and a circuit board 6 can also pass through the first cavity The opening of the second container 412 is placed and positioned on the second positioning portion 417 of the second container 412 . In addition, when the end of the rotating shaft 31 is combined with the bearing 5 in the first groove 411, the end will abut against one side of the stopper 413, so it is better to connect the end of the rotating shaft 31 with the stopper 413. A wear-resistant sheet b is arranged between the contact surfaces of the stopper 413 to prevent the rotating shaft 31 from wearing and tearing for a long time, which will cause wear on both the stopper 413 and the rotating shaft 31 .

Next, please refer to FIG. 6 , the circuit of the stator 2 extends into the second groove 412 through the wire groove 414 of the base body 41 , because the locking part 415 of this embodiment is formed between the wire groove 414 The bending angle, using the bending drop between the two, can further position the line in the locking portion 415, preventing the line from arbitrarily leaving the second groove 412 through the line groove 414, thereby facilitating the The circuit of the stator 2 is electrically connected with the circuit board 6 in the second container 412; finally, the bottom plate 42 is aligned and combined with the opening of the second container 412, and the periphery of the assembly port 122 is bent and pressed. The shoulder 421 of the bottom plate 42 ensures that the bottom plate 42 is firmly fixed at the opening of the second container 412 .

In addition, since the base plate 42 is preferably a thin metal plate, the base plate 42 can force the pressing portion 422 to be bent and deformed by external force, and the bent pressing portion 422 is supported against one side of the circuit board 6 . The circuit board 6 in the second cavity 412 is stably supported, thereby improving assembly reliability.

With the help of the space configuration and structural design between the first cavity 411, the second cavity 412 and the stopper 413 of the base body 41, the bearing 5 and the circuit board 6 can be assembled separately when the inner rotor motor is assembled. Put the first container 411 and the second container 412 from the opposite ends (top and bottom) of the seat 41, without being restricted by space and assembly sequence; The stopper portion 413 can stably fix the bearing 5 in the first slot 411 , without additional positioning components such as clips or C-rings for fixing, which effectively simplifies the assembly procedure.

Furthermore, the seat body 41 is provided with the wire groove 414 and the locking part 415, so that the circuit of the stator 2 can enter the second receiving groove 412 through the wire groove 414 and be positioned on the locking part 415. It further enhances the overall convenience of motor assembly.

Claims (9)

1. An inner rotor motor, characterized in that it comprises: A shell seat, forming an assembly space inside, and an assembly port at the bottom of the assembly space; A stator accommodated in the assembly space of the housing; A rotor is pivotally mounted on the casing by means of bearings; A bearing seat, the bearing seat includes a seat body, which is arranged in alignment with the assembly port of the assembly space, and the two ends of the seat body are respectively provided with a first containing groove and a second containing groove, and the seat body is in the A stop portion is formed between the first container and the second container, and the first container and the second container are respectively formed with an opening at both ends of the seat body, and the side wall outer wall surface of the seat body A plurality of wire slots are formed in the recess, and each of the wire slots is respectively arranged on the side wall of the base body and communicates with the second storage slot. 2. The inner rotor motor according to claim 1, wherein the base body is provided with a plurality of locking parts, each of the locking parts is respectively formed at the end of each of the wire slots, and communicates with the second storage slot , a bending angle is formed between the engaging portion and the slot. 3. The inner rotor motor according to claim 1 or 2, characterized in that: the opening diameter of the first container is greater than or equal to the outer diameter of the bearing. 4. The inner rotor motor according to claim 1 or 2, wherein the base body is provided with a first positioning portion and a second positioning portion, and the first positioning portion is formed on the outer side wall of the base body The second positioning portion is disposed on the inner wall of the side wall of the base body, and the second positioning portion is adjacent to the opening of the second container. 5. The inner rotor motor according to claim 4, wherein the first positioning portion and the second positioning portion are a stepped portion. 6. The inner rotor motor according to claim 1 or 2, wherein the bearing housing further includes a bottom plate, and the bottom plate is aligned and combined with the opening of the second container. 7. The inner rotor motor according to claim 6, wherein the bottom plate is provided with a shoulder and several pressing parts, the shoulder is arranged around the outer peripheral edge of the bottom plate, and the pressing parts can be bent set at the center of the bottom plate. 8. The inner rotor motor according to claim 1 or 2, wherein a supporting ring is combined with an inner wall of the first container, and the supporting ring is a metal supporting ring. 9. The inner rotor motor according to claim 1 or 2, characterized in that: a wear-resistant sheet is additionally provided, and the wear-resistant sheet is arranged in the first cavity and abuts against one of the stoppers. side. the

Images