Motor with externally-mounted bearing

Abstract

The utility model relates to the technical field of motors, and particularly discloses a bearing externally-mounted motor, which comprises a motor shell, an output shaft, a mounting seat, a first bearing and a lower end cover, the output shaft penetrates through the motor shell, and an inner ring of the first bearing is sleeved on the output shaft; a lower opening through which the first bearing can penetrate is formed in the bottom of the motor shell, the mounting seat is arranged in the motor shell, and an outer ring of the first bearing is fixedly mounted on the mounting seat; and the lower end cover is fixed on the motor shell and covers the lower opening. The mounting structure is simple, and the bearing is convenient to assemble.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially bearing external type motor. BACKGROUND

[0002] Motor bearing is one of important components of most motors, which can support the output shaft of the motor and reduce the friction of the output shaft rotation, so that the output shaft can rotate stably. Some motors such as servo motor use multiple bearings to further increase the stability of the output shaft.

[0003] As shown in the Chinese utility model patent with publication number CN215010008U, due to the limitation of the mounting structure, the bearing at the lower end cover of the existing motor is installed from the upper end opening of the motor shell into the shell, which is very cumbersome to assemble, and the motor shell needs to be processed multiple times, and the mounting structure is complex. SUMMARY

[0004] The utility model provides a bearing external type motor, and the mounting structure is simple, which facilitates the assembly of the bearing.

[0005] To solve the above problems, the utility model adopts the following technical scheme:

[0006] The embodiment of the utility model provides a bearing external type motor, which comprises a motor shell, an output shaft, a mounting seat, a first bearing and a lower end cover.

[0007] In some embodiments, the mounting seat is provided with a mounting groove that is connected with the lower opening, and the first bearing is located in the mounting groove.

[0008] In some embodiments, the outer ring of the first bearing is clamped with the inner wall of the mounting groove, or the outer ring of the first bearing is interference fit with the mounting groove.

[0009] In some embodiments, the mounting seat is provided with a downward protruding positioning member, which is inserted into the lower opening and abuts against the inner wall of the lower opening.

[0010] In some embodiments, the bottom of the motor shell is provided with a concave lower groove, and the lower opening is arranged on the inner wall of the lower groove; the lower groove is provided with a fixing member and a circuit board, the fixing member is fixed in the lower groove, and the circuit board is fixed on the fixing member.

[0011] In some embodiments, the mounting seat and the fixing member are fixedly connected with the motor housing through the same set of connecting members.

[0012] In some embodiments, the lower end cover covers the lower groove and covers the fixing member and the circuit board.

[0013] In some embodiments, a connecting ring is arranged in the lower groove, and the lower end cover is fixedly connected with the connecting ring.

[0014] In some embodiments, a stator assembly is fixed in the motor housing, and the first bearing is located on the inner side of the stator assembly.

[0015] In some embodiments, a second bearing is further included, an inner ring of the second bearing is sleeved on the output shaft, a top surface of the motor housing is provided with an upper groove, the second bearing is located in the upper groove, and an outer ring of the second bearing is fixedly connected with the motor housing.

[0016] In some embodiments, the outer ring of the second bearing is clamped with the inner wall of the upper groove, or the outer ring of the second bearing is shrink-fitted with the upper groove.

[0017] The motor housing is provided with a lower opening through which the first bearing can pass, the mounting seat is arranged in the motor housing, the first bearing can be put into the motor housing through the lower opening and then fixedly mounted on the mounting seat, so that the motor housing does not need to be complicatedly processed, the mounting structure is simpler, and the assembly of the bearing is facilitated.

[0018] Meanwhile, the step of complicatedly processing the motor housing is saved, the manufacturing process is simplified, and the manufacturing cost of the whole motor can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic view of a bearing-external motor according to an embodiment of the present application;

[0020] Figure 2 FIG. 2 is a structural schematic view of the bearing-external motor shown in FIG. 1 from another perspective; Figure 1

[0021] Figure 3 FIG. 3 is a sectional view of the bearing-external motor shown in FIG. 1; Figure 1

[0022] Figure 4 FIG. 4 is an exploded view of the bearing-external motor shown in FIG. 1; Figure 1

[0023] Figure 5 FIG. 5 is a structural schematic view of a motor housing of the bearing-external motor shown in FIG. 1 observed from the bottom; ​​​

[0024] Figure 6 Figure 1 is a structural schematic view of a mounting seat according to an embodiment of the present application;

[0025] Figure 7 Figure 2 is a structural schematic view of a fixing member according to an embodiment of the present application;

[0026] Figure 8 Figure 3 is a structural schematic view of a motor housing according to an embodiment of the present application, viewed from the top.

[0027] In the drawings, reference numerals:

[0028] Stator assembly 10;

[0029] Motor housing 300, lower opening 301, lower groove 302, upper groove 303, lower end cover 310;

[0030] Output shaft 400;

[0031] First bearing 510, second bearing 520, mounting seat 530, mounting groove 531, positioning member 532, threaded hole 533, fixing member 540, through slot 541, circuit board 550, connecting ring 560, connecting member 570. DETAILED DESCRIPTION

[0032] The present application provides the following description with reference to the accompanying drawings to help comprehensively understand various embodiments of the present application as defined by the claims and their equivalents. The description includes various specific details to help understanding, but these details should be regarded as just exemplary. Therefore, those skilled in the art will realize that various changes and modifications can be made to the various embodiments described herein without departing from the scope and spirit of the present application.

[0033] In the description of the present application, the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0034] It should be understood that when one element (e.g., a first element) is "connected" to another element (e.g., a second element), the element can be directly connected to the other element, or there can be an intervening element (e.g., a third element) between the element and the other element.

[0035] The embodiment of the present application provides a bearing outer motor, such as Figures 1-5As shown, the motor includes a motor housing 300, an output shaft 400, a mounting seat 530, a first bearing 510 and a lower end cover 310. The output shaft 400 is arranged in the motor housing 300, i.e. a part of the output shaft 400 extends into the motor housing 300 and the other part extends out of the motor housing 300 to be connected to a component to be driven. The part of the output shaft 400 provides driving force for the motor, and rotates when the motor works. The inner ring of the first bearing 510 is sleeved on the output shaft 400 to rotate with the output shaft 400.

[0036] The bottom of the motor housing 300 is provided with a lower opening 301 through which the first bearing 510 passes, and the lower opening 301 is in communication with the internal cavity of the motor housing 300, so that the first bearing 510 can be placed into the internal cavity of the motor housing 300 through the lower opening 301. The mounting seat 530 is arranged in the motor housing 300, i.e. in the internal cavity of the motor housing 300, and the outer ring of the first bearing 510 is fixedly arranged on the mounting seat 530 to fix the first bearing 510. The lower end cover 310 is fixed on the motor housing 300 and covers the lower opening 301 to prevent dust from entering the internal cavity of the motor housing 300 through the lower opening 301, thereby playing a dustproof role.

[0037] When the first bearing 510 of the embodiment is installed, the first bearing 510 can be placed into the internal cavity of the motor housing 300 through the lower opening 301 and then fixed on the mounting seat 530. This installation method does not require complex processing of the motor housing 300, and the installation structure is simpler and facilitates the assembly of the bearing. The motor housing 300 can only be subjected to simple processing such as stamping, thereby saving the step of complex processing of the motor housing 300, simplifying the manufacturing process and reducing the manufacturing cost of the entire motor.

[0038] In the embodiment, the caliber of the lower opening 301 can be greater than the outer diameter of the first bearing 310, so as to facilitate the first bearing 510 to pass through the lower opening 301. Alternatively, the area of the lower opening 301 can be greater than the sectional area of the first bearing 310 in the vertical section, so that the first bearing 510 can be deflected by a certain angle and then inserted into the lower opening 301 to be placed into the internal cavity of the motor housing 300.

[0039] In some embodiments, as Figures 4-6As shown, the mounting seat 530 is provided with a mounting groove 531 that is in abutment with the lower opening 301, and the first bearing 510 is located in the mounting groove 531. The mounting groove 531 not only provides a mounting space for the first bearing 510, but also can limit the movement of the first bearing 510 in the radial direction, thereby positioning the first bearing 510. Since the mounting groove 531 is in abutment with the lower opening 301, after the first bearing 510 is passed through the lower opening 301, the first bearing 510 can be directly placed into the mounting groove 531, thereby facilitating the installation of the first bearing 510 and improving the assembly speed.

[0040] Further, the outer ring of the first bearing 510 is in abutment with the inner wall of the mounting groove 531, so as to fix the first bearing 510 to the mounting seat 530. The inner wall of the mounting groove 531 can be provided with a plurality of protruding clamping strips or clamping rings, which abut against the outer ring of the first bearing 510, thereby clamping and fixing the first bearing 510 in the mounting groove 531.

[0041] Alternatively, the outer ring of the first bearing 510 is in interference fit with the mounting groove 531, so as to fix the first bearing 510 to the mounting seat 530. Of course, the first bearing 510 can also be fixed on the mounting seat 530 by other ways such as welding, pasting, etc.

[0042] In some embodiments, as shown in Figures 4-6 As shown, the mounting seat 530 is provided with a downwardly protruding positioning member 532, which is inserted into the lower opening 301 and abuts against the inner wall of the lower opening 301. Thus, the positioning member 532 is limited by the inner wall of the lower opening 301, and accordingly, the movement of the mounting seat 530 in the radial direction of the lower opening 301 is limited, thereby positioning the mounting seat 530 and keeping it in a relatively stable position, so as to stably support the first bearing 510.

[0043] Further, the positioning member 532 can be plate-shaped and distributed around the lower opening 301 in a plurality of circular shapes, or the positioning member 532 can be ring-shaped and coaxial with the lower opening 301.

[0044] In some embodiments, as shown in Figures 4-6 As shown, the bottom of the motor housing 300 is provided with an inner recessed lower groove 302, and the lower opening 301 is arranged on the inner wall of the lower groove 302. The lower groove 302 is provided with a fixing member 540 and a circuit board 550, the fixing member 540 is fixed in the lower groove 302, and the circuit board 550 is fixed on the fixing member 540. The circuit board 550 is provided with a driving circuit connected with the motor rotor and / or the motor stator, so as to drive the motor rotor and / or the motor stator to work.

[0045] The lower groove 302 of the present embodiment provides space for the installation of the circuit board 550, so that the circuit board 550 can not protrude from the bottom surface of the motor housing 300, and the bottom surface of the motor housing 300 is more flat. At the same time, the fixing member 540 is a carrier for the circuit board 550, which can avoid abnormal situations such as short circuit of the circuit board 550 compared with the motor housing 300 as a carrier, and the thickness of the fixing member 540 can be greater than the thickness of the wall of the motor housing, which is more convenient for installing the circuit board 550.

[0046] In the present embodiment, the fixing member 540 can be annular, and the center hole thereof can be used to avoid the output shaft 400 to avoid interference with the output shaft 400. The circuit board 550 can be fixed on the fixing member 540 by various ways such as screw fixation, adhesive fixation, etc.

[0047] Further, as shown in Figure 4 , Figure 6 and Figure 7 , the mounting seat 530 and the fixing member 540 are fixedly connected with the motor housing 300 by the same set of connecting members 570, so that the mounting seat 530 and the fixing member 540 can be installed and fixed through the connecting members 570, so as to simplify the installation structure.

[0048] In the present embodiment, the connecting member 570 can be a screw, the fixing member 540 is provided with a through slot 541 penetrating itself, the motor housing 300 is provided with a through hole, and the mounting seat 530 is provided with a threaded hole 533, the threaded hole 533, the through hole and the through slot 541 are in butt joint, and the screw can penetrate the through slot 541 and the through hole and then be fixed into the threaded hole 533.

[0049] In some embodiments, as shown in Figure 3 and Figure 5 , the lower end cover 310 covers the lower groove 302 and covers the fixing member 540 and the circuit board 550 inside. Since the lower opening 301 is arranged on the inner wall of the lower groove 302, when the lower end cover 310 covers the lower groove 302, the lower opening 301 is also covered. The fixing member 540 and the circuit board 550 are covered inside by the lower end cover 310 to play a dustproof protection role for the fixing member 540 and the circuit board 550.

[0050] In some embodiments, as shown in Figure 4 and Figure 5 , a connecting ring 560 is arranged in the lower groove 302, and the lower end cover 310 is fixedly connected with the connecting ring 560. On the one hand, the connecting ring 560 can strengthen the structural strength of the motor housing 300, and on the other hand, the connecting ring 560 is equivalent to increasing the thickness of the installation position, which is more convenient for the installation of the lower end cover 310.

[0051] The connecting ring 560 can abut against and be fixed on the inner wall of the lower groove 302. Specifically, the connecting ring 560 can be fixed on the inner wall of the lower groove 302 by welding, sticking or the like.

[0052] The lower end cover 310 can be fixed on the connecting ring 560 by welding, screwing, sticking or the like.

[0053] In some embodiments, as shown in Figure 3 , the stator assembly 10 is fixed in the motor housing 300, and the first bearing 510 is located on the inner side of the stator assembly 10 and does not protrude from the stator assembly 10 in the axial direction of the output shaft 400. Compared with placing the first bearing 510 on the outer side of the stator assembly 10, the overall size of the motor in the axial direction of the output shaft 400 can be reduced, which provides conditions for making the motor thinner.

[0054] In some embodiments, as shown in Figure 3 , Figure 4 and Figure 8 , the bearing-out motor further comprises a second bearing 520, and the inner ring of the second bearing 520 is sleeved on the output shaft 400 to rotate with the output shaft 400. The top surface of the motor housing 300 is provided with an upper groove 303, the second bearing 520 is located in the upper groove 303, and the outer ring of the second bearing 520 is fixedly connected with the motor housing 300.

[0055] When installing the second bearing 520, the second bearing 520 is placed in the upper groove 303, which simplifies the installation structure of the second bearing 520 and facilitates the assembly of the second bearing 520.

[0056] Further, the outer ring of the second bearing 520 is clamped with the inner wall of the upper groove 303. The inner wall of the upper groove 303 can be provided with a plurality of protruding clamping strips or clamping rings, which abut against the outer ring of the second bearing 520 to clamp and fix the second bearing 520 in the upper groove 303.

[0057] Alternatively, the outer ring of the second bearing 520 is interference-fitted with the upper groove 303 to fix the second bearing 520 in the upper groove 303. Of course, the second bearing 520 can also be installed and fixed in the upper groove 303 by other ways such as welding and sticking.

[0058] The terms and words used in the above description and claims are not limited to the literal meaning but are merely used by the applicant to enable a clear and consistent understanding of the present application. Therefore, it should be apparent to those skilled in the art that the description of various embodiments of the present application is merely provided for the purpose of illustration and is not intended to limit the present application as defined by the appended claims and their equivalents.

Claims

1. A bearing-outboard motor characterized by: The motor shell, the output shaft, the mounting seat, the first bearing and the lower end cover are included; the output shaft is arranged in the motor shell, and the inner ring of the first bearing is sleeved on the output shaft; the bottom of the motor shell is provided with a lower opening through which the first bearing passes, the mounting seat is arranged in the motor shell, and the outer ring of the first bearing is fixedly arranged on the mounting seat; and the lower end cover is fixed on the motor shell and covers the lower opening.

2. The bearing-outboard motor according to claim 1, characterized in that: The mounting seat is provided with a mounting groove which is in abutment with the lower opening, and the first bearing is located in the mounting groove.

3. The bearing-outboard motor according to claim 2, characterized in that: The outer ring of the first bearing is in clamping connection with the inner wall of the mounting groove, or the outer ring of the first bearing is in interference fit with the mounting groove.

4. The bearing-outboard motor according to claim 1, characterized in that: The mounting seat is provided with a positioning member which protrudes downward, the positioning member is inserted into the lower opening and abuts against the inner wall of the lower opening.

5. The bearing-outboard motor according to claim 1, characterized in that: The bottom of the motor shell is provided with a concave lower groove, and the lower opening is arranged on the inner wall of the lower groove; the lower groove is provided with a fixing member and a circuit board, the fixing member is fixed in the lower groove, and the circuit board is fixed on the fixing member.

6. The bearing-outboard motor according to claim 5, characterized in that: The mounting seat and the fixing member are fixedly connected with the motor shell through the same set of connecting members.

7. The bearing-outboard motor according to claim 5, characterized in that: The lower end cover covers the lower groove and covers the fixing member and the circuit board.

8. The bearing-outboard motor according to claim 7, characterized in that: The lower groove is provided with a connecting ring, and the lower end cover is fixedly connected with the connecting ring.

9. The canned motor pump of any of claims 1-8, wherein: The motor shell is fixedly provided with a stator assembly, and the first bearing is located on the inner side of the stator assembly.

10. The canned motor pump of any of claims 1-8, wherein: The motor shell is fixedly provided with a stator assembly, and the first bearing is located on the inner side of the stator assembly.

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