The problem and solution of 370 worm small motor
1. Introduction
370 worm small motors are widely used in many fields such as smart homes, industrial automation, robots, etc. due to their advantages of small size, high torque, and compact structure. However, in practical applications, it may also encounter various problems that affect its performance and lifespan. Below, we will analyze these issues and propose corresponding solutions.
2、 Common problems and their causes
（1） Noise issue
The noise sources of the 370 worm small motor are diverse:
Uneven division of worm gear: During the manufacturing process of worm gear, if the division is uneven, it will cause poor meshing with the worm wheel, resulting in impact and vibration, and thus causing noise.
Quality issues with bearings or improper assembly clearances: Low speed end noise is often caused by poor bearing quality or inappropriate clearance between assembly covers. If the bearings have defects, damage, or if the clearance between the covers is not strictly controlled during assembly, it will cause abnormal noise during motor operation.
（2） High temperature jamming problem
When the temperature rise of the motor exceeds 45 ℃, it is in a high temperature state and prone to jamming. The reasons for this are:
Improper selection: If the motor selection is unreasonable and operates under overload for a long time, the internal heat of the motor will continue to accumulate, the temperature will continue to rise, and ultimately lead to jamming.
Lubricating grease problem: Insufficient or unqualified lubricating grease will result in poor lubrication of the meshing surface between the worm and worm gear, increased friction, and the generation of a large amount of heat, leading to high temperature jamming.
Other factors: Tight fitting of the end cap cover will exacerbate wear and generate more heat; Excessive input speed can also cause significant stress on the internal components of the motor, leading to a rapid increase in temperature.
（3） Vibration malfunction
The vibration during motor operation may be caused by the following reasons:
Uneven separation of worm gear and screw pitch: If the accuracy of worm gear separation is not high and there is an error in screw pitch, it will affect the meshing accuracy with the worm wheel, resulting in vibration during motor operation.
The clearance between the bearing cone surfaces is too small: Improper adjustment of the clearance between the bearing cone surfaces can cause poor bearing operation and vibration.
The installation of the motor and reducer is not concentric: During the installation process, if the axis of the motor and reducer are not aligned, it will cause an unbalanced force in the transmission system, which will then cause vibration.
3、 Solution
（1） Regarding the issue of noise
Optimize worm gear processing technology: Adopt high-precision worm gear processing equipment and technology to ensure uniform separation of the worm gear, improve the meshing accuracy between the worm gear and the worm wheel, and thereby reduce the noise caused by poor meshing.
Selecting high-quality bearings and reasonable assembly: Strictly control the quality of bearings, choose reputable bearing suppliers, and ensure reliable bearing performance. During the assembly process, the clearance between the bearing cover is precisely adjusted according to standard technology to ensure the good operation of the bearing and reduce noise sources.
（2） Regarding the issue of high temperature jamming
Reasonable selection: Based on the actual workload and working conditions, choose the correct model of 370 worm small motor to avoid long-term overload operation of the motor. When necessary, larger power or higher torque motor models can be selected to meet work requirements and reserve a certain safety margin.
Improve lubrication conditions: Ensure that there is sufficient and qualified lubricating grease inside the motor. Regularly check the quantity and quality of lubricating grease, and promptly replenish or replace it. At the same time, efficient lubricating grease suitable for the operating temperature range of the motor can be selected to improve the lubrication effect and reduce frictional heating.
Optimize assembly and adjustment: When assembling the end cap cover, strictly control the fitting clearance according to technical requirements to avoid over tightening. Reasonably control the input speed to ensure that the motor operates within the rated speed range and prevent rapid temperature rise caused by excessive speed.
（3） Regarding vibration faults
Improve the machining accuracy of components: For key components such as worm and screw, strengthen quality inspection to ensure that their parting accuracy and pitch uniformity meet design requirements, improve the meshing stability of the transmission system, and reduce vibration generation.
Accurate adjustment of bearing clearance: During the motor assembly process, carefully adjust the clearance of the bearing cone surface to ensure it is within the appropriate range, ensuring the flexible operation of the bearing and reducing the risk of vibration.
Ensure installation concentricity: During the installation process of the motor and reducer, precise measuring tools and assembly fixtures are used to strictly control the concentricity of the motor and reducer axis, ensuring the balance of the transmission system and effectively reducing vibration.
4、 Practical application cases
（1） Smart home curtain motor
In the application scenario of smart home curtains, a certain enterprise uses a 370 worm small motor to drive the opening and closing of curtains. However, users have reported that some motors produce loud noise during operation, which affects the user experience. After investigation, it was found that the main cause of poor meshing with the worm gear was insufficient precision of the worm gear split. By optimizing the worm gear machining process, the enterprise has improved the splitting accuracy and conducted quality screening and assembly process improvement on the bearings, effectively reducing motor noise and enhancing user satisfaction.
（2） Material transfer motor for industrial automation production line
In a certain industrial automation production line, a 370 worm small motor is used to drive the material conveying device. However, after running for a period of time, the motor frequently experiences high temperature jamming faults, causing the production line to shut down and affecting production efficiency. Through monitoring and analysis of the working status of the motor, it was found that it was caused by long-term overload operation of the motor and insufficient lubricating grease. After adopting reasonable selection, replacing with a higher power motor model, and strengthening regular maintenance and management of lubricating grease, the phenomenon of motor high temperature jamming was significantly improved, and the production line was able to operate stably.
（3） Small reconnaissance robot motor
A small reconnaissance robot developed by a certain research team, equipped with a 370 worm small motor, experienced significant vibration and unstable movement when walking on complex terrain. After technical analysis, it was determined that the vibration problem was caused by the misalignment of the motor and reducer installation, as well as the uneven separation of the worm and screw pitch. By readjusting the installation position of the motor and reducer to ensure the concentricity of the axis, and optimizing the worm machining process, the accuracy of the parting and pitch has been improved, greatly enhancing the walking stability of the robot on complex terrain and successfully completing various reconnaissance tasks.
5、 Conclusion
Although the 370 worm small motor may encounter problems such as noise, high temperature jamming, and vibration in its application, through in-depth analysis of the causes of the problems and targeted solutions such as optimizing component processing technology, rational selection, improving lubrication conditions, and precise assembly, these problems can be effectively solved, improving the performance and reliability of the motor, and ensuring its stable operation and wide application in smart homes, industrial automation, robots, and other fields.