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Low-axial-movement motor

A technology of axial movement and bearings, which is applied in the direction of electrical components, electromechanical devices, electric components, etc., can solve problems such as locking, and achieve the effects of reducing axial movement, increasing rigidity, and improving life

Pending Publication Date: 2021-07-09
上海鸣志派博思自动化技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the deep groove ball bearing itself is not a clearance adjustment bearing. When the preload is too large, the bearing resistance will be greater than the motor output torque, resulting in locking

Method used

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specific Embodiment

[0039] like Figure 3-4 As shown, take NEMA23 motor as an example: Angular contact bearings are selected according to the size of NEMA23 series motors, and the inner and outer diameters are φ12mm and φ28mm respectively. According to the size of the existing inner and outer rings of the bearing, find a disc washer with a suitable size, so that the disc washer acts on the outer ring of the bearing. The angular contact bearings are located face-to-face at the front and rear ends of the motor, and the butterfly springs are located back-to-back in front of the angular contact bearings and locking blocks at the front of the motor. The setting of the preload is 70-100mN·m. After the assembly is completed, adjust the locking block to an appropriate preload. If the preload is less than the recommended value, the bearing cannot reach the ideal preload state. If the preload is larger than the recommended value, the output torque of the motor will be reduced, resulting in motor failure. ...

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PUM

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Abstract

The present invention relates to a low-axial-movement motor. The motor comprises a front end cover, a rear end cover, a stator, a rotor (4) and bearings, the bearings are pretightening bearings (2), the two ends of the rotor (4) are fixed in bearing chambers of the front end cover and the rear end cover through a pair of pretightening bearings (2), and the pretightening bearings (2) are provided with mechanisms for providing pretightening force; and the magnitude of the pre-tightening force is adjusted according to different motor series, so that the motor positioning torque is at a set value. Compared with the prior art, the invention has the advantages of greatly reducing the axial movement, increasing the axial load capacity, prolonging the service life of the motor and the like.

Description

technical field [0001] The invention relates to a motor, in particular to a motor with low axial movement. Background technique [0002] As the basic power unit in the field of motion control, stepping motor or brushless motor has great demand in various fields. With the development of industry, the requirements for precision production are getting higher and higher, and the demand for high-precision position control is getting higher and higher, especially when stepping motors or brushless motors are used in combination with screw rods to provide axial linear When moving, it is necessary to consider many factors that affect the linear motion of the axis. [0003] For conventional motors, the motor itself often has a certain axial displacement after being subjected to a certain axial force. However, as far as the structure of the motor is concerned, the rotor is usually fixed in the bearing chamber of the end cover by the bearings at both ends, and there is no obvious mech...

Claims

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Application Information

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IPC IPC(8): H02K5/16
CPCH02K5/161
Inventor 张栋曾凯吴志敢
Owner 上海鸣志派博思自动化技术有限公司
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