Motor upper casing and motor

Abstract

The utility model discloses a motor upper casing, which comprises an upper casing and a support fixedly arranged at the top of the upper casing, a circular through hole is arranged at the center of the top wall of the upper casing, a blind hole position for a motor rotating shaft to insert is arranged on the support right above the circular through hole, the blind hole position and the circular through hole are concentrically arranged, and the top surface of the blind hole position is a plane. The utility model also discloses a motor comprising the motor upper casing. The blind hole position is arranged on the support right above the upper shell, one end of the motor rotating shaft is inserted into the blind hole position, and the top face of the blind hole position can abut against the end face of the motor rotating shaft, so that axial limiting of the motor rotating shaft is achieved, and a traditional spindle radial fixing mode is replaced. The motor rotating shaft and the top surface of the blind hole position are fixed in a shaft end axial contact manner, and the arc-shaped end surface of the motor rotating shaft and the top surface of the blind hole position are in point contact, so that the friction force is greatly reduced, and the improved motor has the advantages of low noise, low running current, less heat and low vibration.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor housing and a motor. Background Technology

[0002] Existing motor structures such as Figure 1 As shown, the motor shaft 101 is mounted on bearings 102 on both sides. Since the motor rotor rotates under the drive of the electromagnetic field of the coil, it is impossible for the motor rotor to rotate absolutely coaxially with the stator during operation. Therefore, eccentricity occurs, resulting in uneven magnetic gap vibration. This leads to an increase in the friction between the motor shaft 101 and the bearings 102. At the same time, since the motor shaft 101 itself does not have an axial limiting structure, it is also easy for axial runout to occur during operation. The coexistence of radial runout and axial runout causes the motor to easily experience problems such as high noise, high current, high heat generation, and high vibration during operation. Utility Model Content

[0003] In view of the technical problems existing in the background art, the purpose of this utility model is to provide a motor housing and motor, which solves the technical problems of "existing motors having high operating noise, high current, high heat generation and high vibration" in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A motor housing includes an upper housing and a bracket fixed to the top of the upper housing. A circular through hole is provided at the center of the top wall of the upper housing. The bracket is provided with a blind hole for inserting a motor shaft at a position directly above the circular through hole. The blind hole is concentric with the circular through hole and the top surface of the blind hole is a plane.

[0006] Furthermore, the bracket has a socket, and a bushing is detachably mounted on the socket. The blind hole is located at the bottom of the bushing, and the socket can be a through hole or a blind hole. In this invention, the blind hole can also be directly located on the bracket, that is, the bushing is not required.

[0007] In order to facilitate the installation and fixation of the bushing, the bushing includes a stepped portion and a connecting portion adapted to the shape of the insertion hole. The connecting portion is inserted into the insertion hole from bottom to top, and the top wall of the stepped portion abuts against the bracket.

[0008] Preferably, to improve the service life of the bushing and further reduce the friction between the motor shaft and the bushing, the bushing is made of self-lubricating POM plastic. Besides self-lubricating POM plastic, any wear-resistant material can also be used for the bushing.

[0009] Furthermore, the bracket includes a base, a vertical bracket extending upward from the top of the base, and a horizontal bracket extending horizontally from the end of the vertical bracket. The base has a mounting hole, which is concentric with the circular through hole, and the insertion hole is located on the horizontal bracket.

[0010] Furthermore, the upper shell is a cylindrical structure with a top wall and tubular side walls.

[0011] Preferably, a plurality of pole claws are fixedly provided at the bottom of the top wall along the edge of the circular through hole, and a convex notch is provided at the lower edge of the tubular side wall.

[0012] Preferably, the side of the blind hole is a tapered surface that is narrower at the top and wider at the bottom, and the edge of the motor shaft end is in line contact with the side of the blind hole, which further reduces the friction when the motor shaft rotates.

[0013] This utility model also discloses a motor, including a housing, a motor shaft installed inside the housing and extending outward at one end, and a motor rotor arranged around the shaft. The housing includes an upper motor housing and a lower motor housing connected to each other, and the upper motor housing is the motor housing described above.

[0014] Preferably, the motor shaft is fixed in axial contact with the top surface of the blind hole.

[0015] This invention has the following advantages: By setting a blind hole on the bracket directly above the upper housing, one end of the motor shaft is inserted into the blind hole, and the top surface of the blind hole can abut against the end face of the motor shaft, thereby achieving axial positioning of the motor shaft, replacing the traditional radial fixing method of the main shaft; at the same time, the motor shaft and the top surface of the blind hole are axially contacted and fixed, the arc-shaped end face of the motor shaft and the top surface of the blind hole are in point contact, and the edge of the motor shaft end and the side surface of the blind hole are in line contact, which greatly reduces the friction force, so that the improved motor has the advantages of low noise, low operating current, low heat generation and low vibration. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the internal structure of an existing motor;

[0017] Figure 2 This is a three-dimensional structural diagram of the upper housing of the motor;

[0018] Figure 3 This is a three-dimensional structural diagram of the motor housing from another angle.

[0019] Figure 4 This is a schematic diagram of the internal structure of the motor;

[0020] Figure 5 for Figure 4A magnified view of part A in the diagram.

[0021] Explanation of main component symbols: 101, motor shaft; 102, bearing; 103, housing; 104, motor rotor; 1, upper housing; 10, circular through hole; 11, top wall; 110, pole claw; 12, tubular side wall; 120, U-shaped notch; 2, bracket; 20, insertion hole; 21, base; 210, mounting hole; 22, vertical bracket; 23, horizontal bracket; 3, bushing; 30, blind hole; 31, stepped part; 32, connecting part. Detailed Implementation

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] like Figure 2 , Figure 3 As shown, this utility model discloses a motor housing, including an upper housing 1 and a bracket 2 fixed on the top of the upper housing 1. A circular through hole 10 is provided at the center of the top wall of the upper housing 1. The bracket 2 has a blind hole 30 for inserting the motor shaft 101 at a position directly above the circular through hole 10. The blind hole 30 is concentric with the circular through hole 10, and the top surface of the blind hole 30 is a plane.

[0024] A socket 20 is provided on the bracket 2, and a bushing 3 is detachably installed on the socket 20. A blind hole 30 is provided at the bottom of the bushing 3.

[0025] The bushing 3 includes a stepped portion 31 and a connecting portion 32 that matches the shape of the insertion hole 20. The cross-sectional dimension of the stepped portion 31 is larger than that of the connecting portion 32. The connecting portion 32 is inserted into the insertion hole 20 from bottom to top, and the top wall of the stepped portion 31 abuts against the bracket 2. Preferably, the bushing 3 is made of self-lubricating POM plastic.

[0026] The bracket 2 includes a base 21, a vertical bracket 22 extending upward from the top of the base 21, and a horizontal bracket 23 extending horizontally from the end of the vertical bracket 22. A mounting hole 210 is provided on the base 21, and the mounting hole 210 is concentrically arranged with the circular through hole 10. The insertion hole 20 is provided on the horizontal bracket 23.

[0027] The upper housing 1 is a cylindrical structure with a top wall 11 and tubular side walls 12. Preferably, a plurality of pole claws 110 are fixedly provided at the bottom of the top wall 11 along the edge of the circular through hole 10. A U-shaped notch 120 is provided at the lower edge of the tubular side wall 12.

[0028] Preferably, the side surface of the blind hole position 30 is a tapered surface that is narrower at the top and wider at the bottom, and the edge of the motor shaft end is in line contact with the side surface of the blind hole position 30.

[0029] like Figure 4 , Figure 5 As shown, this utility model also discloses a motor, including a housing 103, a motor shaft 101 installed inside the housing 103 and extending outward at one end, and a motor rotor 104 arranged around the shaft. The housing 103 includes an upper motor housing and a lower motor housing connected to each other, and the upper motor housing is the aforementioned upper motor housing.

[0030] Preferably, the end face of the motor shaft 101 extending outward is an arc-shaped surface, and the arc-shaped surface makes point contact with the top surface of the blind hole 30.

[0031] This invention features a detachable bushing 3 mounted on a bracket 2 directly above the upper housing 1, with a blind hole 30 at the bottom of the bushing 3. One end of the motor shaft 101 is inserted into the blind hole 30, and the top surface of the blind hole 30 abuts against the end face of the motor shaft 101, thereby achieving axial positioning of the motor shaft 101 and replacing the traditional radial fixing method of the main shaft. At the same time, the motor shaft and the top surface of the blind hole are fixed in axial contact, the arc-shaped end face of the motor shaft 101 is in point contact with the top surface of the blind hole 30, and the edge of the motor shaft end is in line contact with the side of the blind hole, which greatly reduces friction and makes the improved motor have the advantages of low noise, low operating current, low heat generation, and low vibration.

[0032] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims are within the scope of protection of the present invention.

Claims

1. A motor housing, characterized in that: The device includes an upper housing and a bracket fixed to the top of the upper housing. A circular through hole is provided at the center of the top wall of the upper housing. The bracket is provided with a blind hole for inserting a motor shaft at a position directly above the circular through hole. The blind hole is concentric with the circular through hole and the top surface of the blind hole is a plane.

2. The motor housing as described in claim 1, characterized in that: The bracket has a socket, and a bushing is detachably installed on the socket. The blind hole is located at the bottom of the bushing.

3. The motor housing as described in claim 2, characterized in that: The bushing includes a stepped portion and a connecting portion adapted to the shape of the insertion hole. The connecting portion is inserted into the insertion hole from bottom to top, and the top wall of the stepped portion abuts against the bracket.

4. The motor housing as described in claim 2, characterized in that: The bushing is made of self-lubricating POM plastic.

5. The motor housing as described in claim 2, characterized in that: The bracket includes a base, a vertical bracket extending upward from the top of the base, and a horizontal bracket extending horizontally from the end of the vertical bracket. The base has a mounting hole, which is concentric with the circular through hole. The insertion hole is located on the horizontal bracket.

6. The motor housing as described in claim 1, characterized in that: The upper shell is a cylindrical structure with a top wall and tubular side walls.

7. A motor housing as described in claim 6, characterized in that: Several pole claws are fixed at the bottom of the top wall along the edge of the circular through hole, and a convex notch is opened at the lower edge of the tubular side wall.

8. The motor housing as described in claim 1, characterized in that: The side of the blind hole is a conical surface that is narrower at the top and wider at the bottom.

9. A motor, comprising a housing, a motor shaft mounted within the housing and extending outward at one end, and a motor rotor disposed around the shaft, wherein the housing comprises an upper motor housing and a lower motor housing connected to each other, characterized in that: The motor housing is the motor housing according to any one of claims 1-8.

10. A motor as described in claim 9, characterized in that: The motor shaft is fixed in axial contact with the top surface of the blind hole.

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