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CN-121984277-A - Motor cooling fan rotating speed adjusting device

CN121984277ACN 121984277 ACN121984277 ACN 121984277ACN-121984277-A

Abstract

The invention provides a motor cooling fan rotating speed adjusting device, belongs to the field of motors, and solves the problem that the rotating speed of an existing motor cooling fan cannot be changed under the condition that the rotating speed of a motor main shaft is fixed. The speed regulating assembly comprises a sealing box with a sealing cavity, a first gear, a second gear, a third gear, a fourth gear, a transmission chain and a transmission shaft, wherein the first gear, the second gear, the third gear, the fourth gear, the transmission chain and the transmission shaft are positioned in the sealing cavity, the sealing box is fixedly arranged on a motor shell, the transmission shaft is rotatably arranged on the sealing box, the first gear is fixedly sleeved on the motor main shaft, the second gear is fixedly sleeved on the transmission shaft, one end of the transmission chain is sleeved on the first gear, the other end of the transmission chain is sleeved on the second gear, the third gear is fixedly sleeved on the transmission shaft, the fourth gear is fixedly connected with the fan, the third gear is meshed with the fourth gear, and the speed regulating assembly is close to the outer side of the motor relative to the fan. The fan rotating speed can be changed by only changing the second gears with different teeth numbers, so that the requirements on the fan rotating speed under different cooling requirements can be met.

Inventors

  • LI XINGBO
  • Cui tianrui
  • LIU QINGYANG
  • HUO WENQUAN
  • PANG LIANPING
  • WANG ANGUO
  • ZHENG ZEYANG
  • ZHENG XIAODONG
  • PAN SHUFENG
  • JIANG HAIYAN
  • ZHAO MINGCHEN
  • LI YUANFENG
  • YAO ZHONGHUA

Assignees

  • 佳木斯电机股份有限公司

Dates

Publication Date
20260505
Application Date
20260203

Claims (10)

  1. 1. A motor cooling fan rotational speed adjustment device, comprising: a fan (2), wherein the fan (2) is rotatably arranged on the motor spindle (100); The speed regulating assembly (1) comprises a sealing box (11) with a sealing cavity, a first gear (12), a second gear (13), a third gear (15), a fourth gear (16), a transmission chain (14) and a transmission shaft (17), wherein the sealing box (11) is fixedly arranged on a motor shell (200), the transmission shaft (17) is rotatably arranged on the sealing box (11), the first gear (12) is fixedly sleeved on a motor main shaft (100), the second gear (13) is fixedly sleeved on the transmission shaft (17), one end of the transmission chain (14) is sleeved on the first gear (12), the other end of the transmission chain is sleeved on the second gear (13), the third gear (15) is fixedly sleeved on the transmission shaft (17), the fourth gear (16) is fixedly connected with the fan (2), the third gear (15) is meshed with the fourth gear (16), and the speed regulating assembly (1) is close to the outer side of the motor relative to the fan (2).
  2. 2. The motor cooling fan rotational speed adjusting device according to claim 1, further comprising an oil filling pipe (92), an oil filling cup (91), an oil discharging pipe (93) and an oil discharging cup (94), wherein the oil filling cup (91) is arranged at the upper end of the motor housing (200), the oil discharging cup (94) is arranged at the lower end of the motor housing (200), the upper end of the oil filling pipe (92) is communicated with the oil filling cup (91), the lower end is communicated with the sealing cavity, the upper end of the oil discharging pipe (93) is communicated with the sealing cavity, and the lower end is communicated with the oil discharging cup (94).
  3. 3. The motor cooling fan rotation speed adjusting device according to claim 1, wherein the width of the seal chamber gradually increases from the top end of the seal box (11) to the center of the motor main shaft (100).
  4. 4. The motor cooling fan rotational speed adjusting device according to claim 1, wherein the sealing box (11) comprises a box body (112) and a box cover (111), the box body (112) is detachably connected with the box cover (111), the box cover (111) is close to the outer side of the motor relative to the box body (112), one end of the transmission shaft (17) is rotatably arranged on the box cover (111), and the other end of the transmission shaft is rotatably arranged on the box body (112).
  5. 5. The motor cooling fan rotational speed adjusting device according to claim 4, further comprising a first bearing (3), a second bearing (5), a first end cover (4) and a second end cover (6), wherein the first bearing (3) is disposed between the transmission shaft (17) and the case cover (111), the first end cover (4) is fixedly disposed on the case cover (111), the first end cover (4) is further abutted against an outer ring of the first bearing (3), the second bearing (5) is disposed between the transmission shaft (17) and the case body (112), the second end cover (6) is fixedly disposed on the case body (112), and the second end cover (6) is further abutted against an outer ring of the second bearing (5).
  6. 6. The motor cooling fan rotating speed adjusting device according to claim 5, wherein the first end cover (4) and the second end cover (6) are respectively provided with an oil filling hole, and the oil filling holes are communicated with the sealing cavity.
  7. 7. The motor cooling fan rotational speed adjusting device according to claim 4, wherein a brake (8) for braking the transmission shaft (17) is provided on the case (112).
  8. 8. The motor cooling fan rotational speed adjusting device according to claim 1, wherein one end of the transmission shaft (17) is provided with an axial stop washer (10).
  9. 9. The motor cooling fan rotational speed adjusting device according to claim 1, wherein a third bearing (7) is provided between the fan (2) and the motor spindle (100).
  10. 10. The motor cooling fan rotational speed adjusting device according to claim 9, wherein the fan (2) comprises a housing (21), a sealing member (22) and a plurality of fan blades (23), the plurality of fan blades (23) are uniformly arranged on the housing (21) along the circumferential direction, a containing cavity is formed between the housing (21) and the sealing member (22), the third bearing (7) is located in the containing cavity, and the containing cavity is communicated with the sealing cavity.

Description

Motor cooling fan rotating speed adjusting device Technical Field The invention belongs to the technical field of motors, and particularly relates to a motor cooling fan rotating speed adjusting device. Background In order to reduce the service temperature of the motor and improve the heat dissipation efficiency of the motor, a cooling fan is generally added in a motor shell, however, the rotating speed of the existing motor cooling fan cannot be changed under the condition that the rotating speed of a motor main shaft is fixed, when the cooling fan is directly connected with the motor main shaft through a key, the rotating speed of the cooling fan is consistent with the rotating speed of the motor main shaft, and when the cooling fan is connected with the motor main shaft through a gear transmission structure, for example, patent application number 201820184293.7 discloses a gear train transmission axial flow fan for heat dissipation of the motor, and the rotating speed of the cooling fan is multiple times that of the motor main shaft, but the rotating speed of the cooling fan cannot be adjusted according to actual needs. Since the gear transmission structure is driven by the engagement between gears, if the rotation speed of the cooling fan is changed by changing gears in the gear transmission structure, the whole gear transmission structure needs to be redesigned and assembled, and the operation is complicated and the cost is high. Therefore, there is a need for a motor cooling fan speed adjusting device, which can adjust the speed of the cooling fan to meet different cooling requirements under the condition that the speed of the motor spindle is fixed, and has simple operation and low cost. Disclosure of Invention In view of this, in order to solve the problem that the rotation speed of the existing motor cooling fan cannot be changed under the condition that the rotation speed of the motor main shaft is fixed, the invention provides a motor cooling fan rotation speed adjusting device. In order to achieve the above purpose, the present invention adopts the following technical scheme: a motor cooling fan rotational speed adjustment device comprising: The fan is rotationally arranged on the motor spindle; The speed regulating assembly comprises a sealing box with a sealing cavity, a first gear, a second gear, a third gear, a fourth gear, a transmission chain and a transmission shaft, wherein the first gear, the second gear, the third gear, the fourth gear, the transmission chain and the transmission shaft are positioned in the sealing cavity, the sealing box is fixedly arranged on a motor shell, the transmission shaft is rotatably arranged on the sealing box, the first gear is fixedly sleeved on a motor main shaft, the second gear is fixedly sleeved on the transmission shaft, one end of the transmission chain is sleeved on the first gear, the other end of the transmission chain is sleeved on the second gear, the third gear is fixedly sleeved on the transmission shaft, the fourth gear is fixedly connected with a fan, the third gear is meshed with the fourth gear, and the speed regulating assembly is close to the outer side of the motor relative to the fan. As a preferred scheme of the motor cooling fan rotating speed adjusting device, the motor cooling fan rotating speed adjusting device further comprises an oil injection pipe, an oil injection cup, an oil discharge pipe and an oil discharge cup, wherein the oil injection cup is arranged at the upper end of the motor shell, the oil discharge cup is arranged at the lower end of the motor shell, the upper end of the oil injection pipe is communicated with the oil injection cup, the lower end of the oil injection pipe is communicated with the sealing cavity, the upper end of the oil discharge pipe is communicated with the sealing cavity, and the lower end of the oil discharge pipe is communicated with the oil discharge cup. As a preferable mode of the motor cooling fan rotation speed adjusting device, the width of the sealing cavity gradually increases from the top end of the sealing box to the center of the motor main shaft. As a preferred scheme of the motor cooling fan rotating speed adjusting device, the sealing box comprises a box body and a box cover, the box body is detachably connected with the box cover, the box cover is close to the outer side of the motor relative to the box body, one end of the transmission shaft is rotatably arranged on the box cover, and the other end of the transmission shaft is rotatably arranged on the box body. As a preferred solution of the motor cooling fan rotation speed adjusting device, the motor cooling fan rotation speed adjusting device further includes a first bearing, a second bearing, a first end cover and a second end cover, the first bearing is disposed between the transmission shaft and the case cover, the first end cover is fixedly disposed on the case cover, the first end cover is further abutted against an o