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CN-114400819-B - Motor housing assembly

CN114400819BCN 114400819 BCN114400819 BCN 114400819BCN-114400819-B

Abstract

The invention provides a motor shell assembly, comprising an axle center and a motor shell, wherein the axle center is provided with a combining end provided with a groove part, the motor shell is provided with a through hole for the axle center to be assembled, the periphery of the through hole is provided with a cylinder part provided with a stressed outer side surface and an inner side surface which correspondingly surrounds the combining end and the groove part of the axle center, the cylinder part is tightly clamped with the combining end by applying an external force on the outer side surface through an external means, and then part of the inner side surface of the cylinder part is extruded into the groove part to form an extrusion convex body to be combined with the groove part below the inner surface of a top wall of the motor shell, so that the motor shell and the axle center are tightly combined and are not easy to separate.

Inventors

  • QIAN JIN

Assignees

  • 深圳兴奇宏科技有限公司

Dates

Publication Date
20260505
Application Date
20220104

Claims (9)

  1. 1. A motor housing assembly, comprising: an axle center having a combining end, the combining end having a groove and a lower part, the lower part being located below the groove; The motor shell comprises a top wall, a motor and a motor, wherein the top wall is provided with a top wall outer face and a top wall inner face, the top wall is provided with a through hole for the axle center to be assembled, the periphery of the through hole protrudes from the top wall inner face to extend a barrel part to be communicated with the through hole, the barrel part is provided with an outer side face and an inner side face, and the outer side face is vertically adjacent to the lower part of the top wall inner face; The combined end of the axle center is inserted into the cylinder part and the through hole, the groove part is positioned below the inner surface of the top wall and corresponds to the inner side surface of the cylinder part, the outer side surface is used for bearing external force of an external means to enable the cylinder part to be tightly clamped with the combined end, partial inner side surface is extruded into the groove part by the external force to form an extrusion convex body to be combined with the groove part below the inner surface of the top wall, and a lower clamping part is positioned below the extrusion convex body to tightly cover the lower part of the combined end, so that the motor shell is tightly combined with the axle center.
  2. 2. The motor housing assembly of claim 1 wherein the motor housing has a side wall extending downwardly from the periphery of the top wall and the side wall and the top wall define a housing space.
  3. 3. The motor housing assembly of claim 1 wherein said coupling end is solid or hollow and has a top surface aligned from said through hole to the outside of the top wall of said motor housing.
  4. 4. The motor housing assembly of claim 1 wherein the slot is a U-shaped or V-shaped or C-shaped annular groove encircling an outer surface of the mating end.
  5. 5. The motor housing assembly of claim 1, wherein the slot is a plurality of notches circumferentially distributed on an outer surface of the mating end.
  6. 6. The motor housing assembly of claim 5, wherein the plurality of recesses are elongated and are disposed in parallel.
  7. 7. The motor housing assembly of claim 5, wherein the plurality of recesses are each a plurality of pairs of two staggered elongated shapes.
  8. 8. The motor housing assembly of claim 5, wherein the plurality of recesses are of the same or different geometries.
  9. 9. The motor housing assembly of claim 1, wherein the outer side of the barrel is provided with a force-bearing region.

Description

Motor housing assembly Technical Field The present invention relates to motor housings, and more particularly to a motor housing assembly coupled to an axle center. Background In the existing heat dissipation technology, no matter the heat sink or the temperature equalizing plate or the flat heat pipe or the combination thereof on the electronic component has limited effect of heat exchange with the environment, a heat dissipation fan for improving the heat dissipation efficiency is additionally arranged to dissipate the heat, so that the heat dissipation efficiency is improved. However, the hub of a general fan has an axis through which a bearing is inserted to correspond to a stator, and drives the fan to operate when the stator is energized and excited to induce. Usually, the hub (plastic) and the axle (metal) are integrally combined with each other by injection molding or punching or riveting, but when the torque of the rotating knob generated by the rotation of the fan is larger than the external torque between the axle and the hub, the axle is easy to separate or loose, so that the fan is damaged and cannot be operated. In particular, as shown in fig. 1, a housing 11 (e.g., a hub or a motor housing) is made of metal (e.g., iron, copper, aluminum or an alloy thereof) and has a top 111, a side portion 112 and an opening 113, wherein an outer side 1111 and an inner side 1112 of the top 111 are respectively formed on opposite sides of the top 111, the opening 113 is disposed through the center of the top 11, and the side portion 112 extends downward from the periphery of the top 111 and defines a receiving space 114 with the top 111 to communicate with the opening 113. An axle center 12 is inserted in the opening 113 to contact the top 111, and is joined by a laser welding (or fusion) at a contact point of an outer peripheral side of the axle center 12 with an outer side 1111 of the adjacent opening 113. That is, a laser device 13 generates a laser beam to weld the outer peripheral side of the shaft 12 with the outer side 1111 of the adjacent opening 113 to form a weld 115. Further, another welded portion is selectively formed by the laser welding (or welding) at a contact portion between the outer peripheral side of the shaft center 12 and the inner side 1112 adjacent to the opening 113. The laser welding integrally combines the housing 11 and the shaft 12 to prevent the shaft 12 from loosening. Because laser welding adopts high-energy density laser as a heat source to irradiate the contact position of two separated elements, the separated elements are quickly melted or vaporized after absorbing the laser energy and form a molten pool together, and the separated elements are solidified together in the subsequent cooling process so as to be connected together. Therefore, in practice, it often happens that the laser welding position cannot be controlled in the focusing range of the laser beam very precisely, so that the laser high temperature penetrates through the damaged element to cause low manufacturing qualification rate, or the time of welding displacement is inconsistent to form a molten pool with different sizes to cause inconsistent dimensional accuracy of the assembly after the shell 11 and the axle center 12 are combined. Therefore, how to solve the above-mentioned problems and disadvantages is the direction of research and improvement for the present inventors and the related manufacturers who are engaged in the industry. Disclosure of Invention In order to solve the above-mentioned problems, an object of the present invention is to provide a motor housing assembly that maintains the dimensional stability of the assembly after the motor housing and the shaft center are combined and improves the manufacturing yield. An object of the present invention is to provide a motor housing assembly that improves the bonding strength between the motor housing and the shaft center and prevents the shaft center from being separated. In order to achieve the above object, the present invention provides a motor housing assembly, comprising: an axle center having a combining end, the combining end having a groove and a lower part, the lower part being located below the groove; The motor shell comprises a top wall, a motor and a motor, wherein the top wall is provided with a top wall outer face and a top wall inner face, the top wall is provided with a through hole for the axle center to be assembled, the periphery of the through hole protrudes from the top wall inner face to extend a barrel part to be communicated with the through hole, the barrel part is provided with an outer side face and an inner side face, and the outer side face is vertically adjacent to the lower part of the top wall inner face; The combined end of the axle center is inserted into the cylinder part and the through hole, the groove part is positioned below the inner surface of the top wall and corresponds to the inner side surface of the c