Motor main shaft clamping shaft sleeve for industrial fan
By adopting a tapered sleeve and thin groove design on the spindle of an asynchronous motor for industrial fans, combined with bolt preload, the problem of spindle not being fixed in the prior art is solved, and higher friction and stability are achieved. Avoid the risk of motor falling off.
Patent Information
- Application Number
- CN202420636793.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-29
- Publication Date
- 2025-01-03
- Estimated Expiration
- 2034-03-29
AI Technical Summary
The spindle of the existing industrial fan asynchronous motor has only one threaded hole for axial fixation, which leads to the risk of falling off under large load conditions.
A tapered shaft sleeve is adopted, the inner wall of the shaft sleeve is equipped with keyways and longitudinal thin grooves, and steps are set at the bottom of the tapered shaft sleeve. It is pre-tightened to increase the radial pressure to enhance friction and ensure the stability of the motor output shaft.
It effectively enhances the axial fixing force of the motor output shaft, avoids the risk of slipping, and ensures the stable installation and use of the motor.
Smart Images
Figure CN222296552U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to an industrial fan, in particular to a main shaft of an asynchronous motor. Background Art
[0002] In the current market, most asynchronous motors have only one threaded hole at the end of their output shafts to fix the load. The motors used in industrial fans are installed vertically, and the loads of industrial fans are relatively large. The axial fixation provided by only this threaded hole and a single bolt may not be enough, and there is a risk of falling off. Summary of the invention
[0003] The utility model aims to solve the above defects of the prior art and provides a motor main shaft clamping sleeve for an industrial fan.
[0004] The utility model has a large friction force with the motor output shaft, and the motor output shaft is tightly clamped to prevent it from slipping.
[0005] The utility model discloses a motor main shaft clamping sleeve for an industrial fan, which is a conical sleeve. The inner wall of the sleeve is provided with a keyway, and longitudinally penetrating fine grooves are respectively provided at relative positions on the circumference of the inner wall.
[0006] The motor main shaft clamping sleeve for an industrial fan has a fine groove on one side with a depth less than the sleeve wall thickness, and a fine groove on the other side completely cuts through the sleeve wall.
[0007] The motor main shaft clamping sleeve for an industrial fan has a step at the bottom of the tapered sleeve.
[0008] The shaft sleeve of the utility model is conical. When the axial end cover, the conical shaft sleeve and the fan blade mounting chassis with conical holes are pre-tightened and installed by bolts, the conical shaft sleeve generates radial pressure. Since the conical shaft sleeve has a completely penetrating fine groove, it will be compressed and deformed after receiving the radial pressure, tightly clamping the motor output shaft to increase the friction force. The other end of the conical shaft sleeve has a limited step, which limits the conical shaft sleeve from passing through the fan blade mounting chassis under the action of the bolt pre-tightening force. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] The utility model is further described below in conjunction with the accompanying drawings:
[0010] Figure 1 It is a combined cross-sectional view of the utility model and the motor shaft;
[0011] Figure 2 Schematic diagram of the tapered bushing. DETAILED DESCRIPTION
[0012] See also Figure 1-Figure 2The utility model discloses a motor main shaft clamping sleeve for an industrial fan, which is a tapered sleeve 1, a keyway is provided on the inner wall of the sleeve, and longitudinal fine grooves 6 are respectively provided at relative positions on the circumference of the inner wall.
[0013] The motor main shaft clamping sleeve for an industrial fan has a fine groove on one side with a depth less than the sleeve wall thickness, and a fine groove on the other side completely cuts through the sleeve wall.
[0014] The motor main shaft clamping sleeve for an industrial fan has a step 7 at the bottom of the conical sleeve.
[0015] When installing, see Figure 1 , the drive motor 1 is installed upside down with the output shaft end vertically downward. First, install the fan blade mounting chassis 4 into the drive motor output shaft, then install the conical sleeve 2 into the motor output, and then use bolts 5 to fix the axial end cover 3 and the fan blade mounting chassis 4. Finally, use bolts to connect the axial end cover and the center shaft of the drive motor together.
[0016] When the axial end cover 3, the conical sleeve 3, and the fan blade mounting chassis 4 with a conical hole are pre-tightened and installed with bolts 4, the conical sleeve 2 generates radial pressure. Since the conical sleeve has a completely penetrating fine groove, it will be compressed and deformed after being subjected to radial pressure, tightly clamping the motor output shaft and increasing friction. The other end of the conical sleeve has a limited step, which limits the conical sleeve from passing through the fan blade mounting chassis under the action of the bolt pre-tightening force.
Claims
1. A motor main shaft clamping sleeve for an industrial fan, the inner wall of the sleeve having a keyway, characterized in that: It is a tapered sleeve, and longitudinal fine grooves are respectively opened at relative positions on the circumference of its inner wall. The depth of the fine groove on one side is less than the thickness of the sleeve wall, and the fine groove on the other side completely cuts through the sleeve wall. The bottom of the tapered sleeve is provided with a step.