Search

CN-117961762-B - Motor shaft and motor

CN117961762BCN 117961762 BCN117961762 BCN 117961762BCN-117961762-B

Abstract

The application relates to a motor shaft which comprises a first shaft section, a second shaft section and a third shaft section, wherein the first shaft section is used for being connected with the output end of a motor, two ends of the second shaft section are respectively connected with the first shaft section and the third shaft section, the third shaft section is used for being connected with a grinding head, a water outlet runner is arranged on the end face of the third shaft section, which is far away from the second shaft section, and extends to the second shaft section, a plurality of water inlet runners communicated with the water outlet runner are arranged in the second shaft section, all the water inlet runners are distributed at intervals around the axial direction of the second shaft section, the inlet end of each water inlet runner penetrates through the peripheral wall of the second shaft section and is used for being communicated with a water filling port, and when the first shaft section rotates, the inlet runner faces the water filling port in the water flow direction. The motor shaft provided by the application can improve the flow rate of cooling water. The application also relates to an electric machine.

Inventors

  • ZHENG JUN
  • DING ZHENGYANG
  • CHEN JUNYI
  • DING QINGWEI
  • HUANG LIYANG

Assignees

  • 厦门理工学院
  • 厦门五星珑科技有限公司

Dates

Publication Date
20260512
Application Date
20240118

Claims (7)

  1. 1. A motor shaft is characterized by comprising a first shaft section (1), a second shaft section (2) and a third shaft section (3), wherein the first shaft section (1) is used for being connected with the output end of a motor (6), two ends of the second shaft section (2) are respectively connected with the first shaft section (1) and the third shaft section (3), the third shaft section (3) is used for being connected with a grinding head, a water outlet runner (31) is formed on the end surface of the third shaft section (3) far away from the second shaft section (2), the water outlet runner (31) extends to the second shaft section (2), a plurality of water inlet runners (21) communicated with the water outlet runner (31) are arranged in the second shaft section (2), all the water inlet runners (21) are distributed around the periphery wall of the second shaft section (2) at intervals, the inlet ends of each water inlet runner (21) penetrate through the periphery wall of the second shaft section (2) for being communicated with a water injection port (72), the water inlet runners (21) are spirally arranged, when the first shaft section (1) rotates, water inlet runners (21) are protruded out of the second shaft section (2) and form water inlet pyramid blocks (29) and water inlet pyramid blocks (29) are arranged between two adjacent water inlet runners (29), the water inlet channel (21) is characterized in that the inlet end of the water inlet channel (21) is communicated with a water drainage groove (291), a water outlet pipe (4) is arranged in the second shaft section (2), the outlet end of the water outlet pipe (4) is communicated with the water outlet channel (31) of the third shaft section (3), the inlet end of the water outlet pipe (4) is connected with a plurality of water inlet pipes (5), the inlet ends of the water inlet pipes (5) penetrate through the peripheral wall of the second shaft section (2) to be communicated with a water filling port (72), the outlet ends of the water inlet pipes (5) are communicated with the inlet end of the water outlet pipe (4), the water inlet pipes (5) are spirally arranged to form the water inlet channel (21), the outlet end of the water outlet pipe (4) extends into the third shaft section (3) and is fixedly provided with a variable-diameter joint (41), and the large end of the variable-diameter joint (41) is communicated with the outlet end of the water outlet channel (31) of the third shaft section (3).
  2. 2. The motor shaft according to claim 1, wherein the end face of the first shaft section (1) close to the second shaft section (2) and the end face of the third shaft section (3) close to the second shaft section (2) are respectively provided with a connecting groove (32), two ends of the second shaft section (2) are respectively provided with a connecting part (22) used for being inserted into the connecting grooves (32), the peripheral wall of each connecting part (22) is provided with a connecting ring (23), the connecting rings (23) are in threaded connection with the connecting grooves (32), and the screwing direction of the threads of the connecting rings (23) is opposite to the rotating direction of the first shaft section (1).
  3. 3. A motor shaft as set forth in claim 2, wherein each of said connection rings (23) has a butt joint ring (24) on its outer peripheral wall, said butt joint ring (24) has a plurality of first butt joint holes (241), said second shaft section (2) has a plurality of second butt joint holes (25) on its end face corresponding to the first butt joint holes (241), each of said second butt joint holes (25) has a butt joint rod (26) penetrating therethrough, said butt joint rods (26) have two ends penetrating through the first butt joint holes (241) of the two butt joint rings (24), said first butt joint holes (241) have a butt joint nut (27), said butt joint nut (27) is sleeved on the butt joint rod (26) and is screwed with the butt joint rod (26).
  4. 4. A motor shaft according to claim 3, wherein the number of the butt joint rods (26) is corresponding to the number of the water inlet pipes (5), the outer wall of each water inlet pipe (5) is abutted against the corresponding butt joint rod (26), and the butt joint rods (26) are supported on the outer sides of spiral arcs of the water inlet pipes (5).
  5. 5. A motor shaft according to claim 4, wherein a reinforcing strip (51) is arranged on the peripheral wall of the water inlet pipe (5), two ends of the reinforcing strip (51) are arranged along a spiral track of the water inlet pipe (5) in an extending mode, the reinforcing strip (51) is located on the outer side of a spiral arc line of the water inlet pipe (5), a positioning ring (52) for a butt joint rod (26) to penetrate is arranged on the reinforcing strip (51), and the butt joint rod (26) is abutted to the water inlet pipe (5) through the positioning ring (52).
  6. 6. A motor shaft as claimed in claim 2, characterized in that annular welding joints (33) are arranged between the first shaft section (1) and the second shaft section (2) and between the third shaft section (3) and the second shaft section (2), and welding strips (34) are arranged in the welding joints (33).
  7. 7. The motor is characterized by comprising a motor (6), a mounting seat (7) and a motor shaft according to any one of claims 1-6, wherein the mounting seat (7) is provided with a penetrating channel (71) for the motor shaft to penetrate, one end of the motor shaft is connected with the output end of the motor (6), the other end of the motor shaft penetrates through the penetrating channel (71) and is used for being connected with a grinding head, and the mounting seat (7) is provided with a water injection port (72) communicated with the penetrating channel (71).

Description

Motor shaft and motor Technical Field The application relates to the technical field of motors, in particular to a motor shaft and a motor. Background The grinding head in the grinding device needs to be driven to rotate by a motor so that the grinding head can grind the surface of an object, and the grinding head generates heat in the grinding process of the grinding head, so that the heat needs to be dissipated in time, and in order to avoid the problem of overheating of the grinding head in the grinding process, a water outlet motor has been developed in the related art. The existing water outlet motor comprises a motor, a mounting seat and a motor shaft, wherein the mounting seat is provided with a penetrating channel, one end of the motor shaft is connected with the output end of the motor, the other end of the motor shaft penetrates through the penetrating channel and is connected with a grinding head, the side wall of the mounting seat is provided with a water injection port communicated with the penetrating channel, a water outlet flow channel is arranged in the motor shaft, one end of the water outlet flow channel penetrates through one end of the motor shaft, close to the grinding head, of the motor shaft, the other end of the water outlet flow channel is communicated with the water injection port, cooling water is introduced into the water injection port and can flow to the grinding head through the water outlet flow channel so as to radiate heat to the grinding head, and therefore the possibility of overheating of the grinding head is reduced. However, in the process that the motor shaft drives the grinding head to rotate, the cooling water flows from the water injection port to the water outlet flow channel, and the motor shaft continuously rotates, so that the cooling water flows from the water injection port to the water outlet flow channel at a slower speed, and the effect of the cooling water on the grinding head is reduced, so that further improvement is needed. Disclosure of Invention In order to improve the flow rate of cooling water, the application provides a motor shaft and a motor. In a first aspect, the present application provides a motor shaft, which adopts the following technical scheme: The motor shaft comprises a first shaft section, a second shaft section and a third shaft section, wherein the first shaft section is used for being connected with the output end of a motor, two ends of the second shaft section are respectively connected with the first shaft section and the third shaft section, the third shaft section is used for being connected with a grinding head, a water outlet runner is formed in the end face, far away from the second shaft section, of the third shaft section, the water outlet runner extends to the second shaft section, a plurality of water inlet runners communicated with the water outlet runner are arranged in the second shaft section, all the water inlet runners are distributed at intervals around the axial direction of the second shaft section, the inlet end of each water inlet runner penetrates through the peripheral wall of the second shaft section and is used for being communicated with a water inlet, and when the first shaft section rotates, the inlet end of each water inlet runner faces the water inlet port. By adopting the technical scheme, through the arrangement of the water outlet flow channel and the water inlet flow channel, the water outlet flow channel is communicated with the water injection port through the water inlet flow channels, and the water inlet flow channels improve the speed of cooling water entering the water outlet flow channel, so that the cooling water can timely act on the grinding head, and the heat dissipation effect of the cooling water on the grinding head is improved; on the other hand, after the cooling water enters the water inlet runner which is spirally arranged, along with the continuous rotation of the first shaft section, the cooling water forms vortex in the water inlet runner, so that the cooling water entering the water inlet runner is pressurized, the cooling water rapidly flows to the water outlet runner, the flow speed of the cooling water is greatly improved, and the heat dissipation effect of the cooling water on the grinding head is improved. Optionally, the outer peripheral wall protrusion of second shaft section is provided with a plurality of pyramid pieces, adjacent two form the water drainage tank between the pyramid piece, the entrance point of water inlet channel is linked together with the water drainage tank. Through adopting foretell technical scheme, through setting up a plurality of pyramid blocks, form a plurality of water drainage tank, the water drainage tank can be with the cooling water guide to the entrance point of intake runner, improves the efficiency that the cooling water got into the intake runner. Optionally, the first shaft section is close to the terminal surface of second shaft