Anti-loose locking bolt fastener
The anti-loosening locking bolt fastener designed with left-hand thread, washer and sealing groove solves the problem of easy loosening of traditional bolts and achieves stable operation and sealing effect of the motor.
Patent Information
- Application Number
- CN202423316858.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-10-28
- Estimated Expiration
- 2034-12-31
AI Technical Summary
Traditional bolts tend to loosen when securing the rotor and shaft, affecting the motor's normal operating accuracy and potentially causing component damage or even rendering the motor inoperable.
The screw adopts a left-hand thread design, combined with a large-area gasket and guide groove structure to increase the contact area and friction. At the same time, the sealing effect is achieved through the sealing groove and sealing ring, and the use of a hexagonal head improves the convenience of operation.
It effectively prevents bolts from loosening, improves connection stability and strength, reduces the effects of thermal expansion and contraction, ensures the normal operation of the motor and prevents oil leakage.
Smart Images
Figure CN223483141U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bolt technology, and more specifically, to an anti-loosening locking bolt fastener. Background Technology
[0002] When the rotor of an electric motor is fitted to the shaft, it typically uses two main types of connection methods: mechanical fixing and electromagnetic fixing. Mechanical fixing mainly uses mechanical devices such as screws and clamping rings to fix the rotor to the shaft, while electromagnetic fixing uses electromagnetic force to attract the rotor to the shaft.
[0003] In practical applications, fixing the rotor and shaft with bolts is the most widely used technique in the industry. However, extensive practical experience has shown that traditional bolt fixing of the rotor and shaft often results in loosening, with a probability as high as 30%, due to factors such as vibration and centrifugal force generated by the continuous rotation of the rotor during motor operation. Loose bolts not only affect the normal operating accuracy of the motor, but long-term accumulation can also potentially damage internal motor components, and in severe cases, even render the motor completely inoperable, posing a significant threat to the stable operation of the motor. Therefore, this invention proposes an effective solution to address this deficiency of traditional bolt fixing methods. Utility Model Content
[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide an anti-loosening locking bolt fastener that can prevent the bolt from loosening when the motor is working.
[0005] To solve the above problems, the present invention adopts the following technical solution.
[0006] A locking bolt fastener includes a screw rod with a thread on its outer surface. The thread is a left-hand thread. A washer is fixedly connected to one end of the screw rod. The cross-sectional area of the washer is larger than that of the screw rod. A turning end is fixedly connected to the end of the washer away from the screw rod. The axes of the screw rod, the washer, and the turning end are on the same straight line.
[0007] Preferably, a guide groove is formed on the arc surface of the screw. The guide groove is straight and parallel to the axis of the screw. One end of the guide groove passes through the end of the screw away from the washer.
[0008] Preferably, the gasket has symmetrical and fixedly connected receiving platforms on both sides, the two receiving platforms are concentric with the gasket, and the outer arc surface of the receiving platform is provided with a sealing groove for placing the sealing ring. The sealing groove is arranged in a ring and is concentric with the receiving platform.
[0009] Preferably, the screwing end includes a hexagonal head, which is fixed to one end of the washer.
[0010] Preferably, the cross-sectional area of the receiving platform is larger than the cross-sectional area of the screw.
[0011] Compared with the prior art, the advantages of the present invention are:
[0012] 1. This solution uses a left-hand thread. The left-hand thread is screwed in when rotated counterclockwise, thus fixing the motor. When the motor's rotating shaft rotates clockwise, the force generated will make the left-hand thread tighten more and more, thus preventing loosening. At the same time, the washer can increase the contact area, thereby increasing the friction and preventing loosening. In addition, the large washer can reduce the stress distribution per unit area.
[0013] Second, the guide groove can increase the contact area with air and facilitate the flow of oil, thereby playing a role in cooling and reducing thermal expansion and contraction.
[0014] Third, the receiving platform and sealing groove are used to place the sealing ring, which is used to seal and prevent oil leakage.
[0015] Fourth, the hexagonal head makes tightening easy and has high tool compatibility.
[0016] Fifth, ensure the contact area between the screw and the washer to guarantee the stability and strength of the connection. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;
[0018] Figure 2 This is a side view of the structure of this utility model.
[0019] Description of the numbers in the figure:
[0020] 1. Screw; 2. Thread; 3. Washer; 4. Turning end; 5. Guide groove; 6. Receiving platform; 7. Sealing groove; 8. Hexagonal head. Detailed Implementation
[0021] Example 1:
[0022] Please see Figure 1-2A locking bolt fastener for preventing loosening includes a screw rod with a threaded outer surface. The thread is a left-hand thread, which screws in when rotated counterclockwise to secure the motor. When the motor's shaft rotates clockwise, the force generated causes the left-hand thread to tighten further, thus preventing loosening. A guide groove is formed on the arc surface of the screw rod. The guide groove is straight and its length is longer than the length of the thread movement on the screw rod. The guide groove is parallel to the axis of the screw rod, and one end of the guide groove and one end of the screw rod are intersected. The guide groove increases the contact area with air and facilitates the flow of oil, thereby playing a role in cooling and reducing thermal expansion and contraction.
[0023] A washer is fixedly connected to the end of the screw away from the end penetrated by the guide groove. The washer is disc-shaped, with a cross-sectional area larger than that of the screw, and its central axis coincides with that of the screw to ensure the coaxiality of the overall structure. The end of the washer closest to the bolt has a carefully designed chamfer at a 5° angle. This chamfer effectively reduces stress concentration under load, extending the washer's service life. The washer's larger cross-sectional area increases the contact area with the connected object. Based on the principles of friction, this increased contact area leads to increased friction, playing a crucial role in preventing bolt loosening. It also evenly distributes the stress, improving connection stability.
[0024] Two receiving platforms are fixedly connected to both sides of the gasket. The two receiving platforms and the gasket are concentric. The screw is fixedly connected to the side of one of the receiving platforms. The cross-sectional area of the receiving platform is larger than that of the screw. From a mechanical point of view, sufficient contact area provides a solid foundation for the connection, thereby ensuring that the connection has good stability and strength. The outer arc surface of the receiving platform has a sealing groove for placing the sealing ring. The sealing groove is arranged in a ring and is concentric with the receiving platform. When the sealing ring is accurately placed in the sealing groove, the sealing ring can fit tightly and fill the gap with its elastic deformation, effectively preventing oil from seeping out from the connection, and playing an excellent sealing role, ensuring that the equipment will not malfunction due to oil leakage during operation.
[0025] A tightening end is fixedly connected to the receiving platform end away from the screw. This tightening end primarily consists of a standard hexagonal head, which is precisely fixed to the corresponding receiving platform end, with its center coinciding with the center of the receiving platform, ensuring the coaxiality and stability of the overall structure. This standardized hexagonal head design, based on its unique geometry, is compatible with various common hexagonal wrenches on the market. In actual operation, whether tightening manually or with the aid of tools, it enables convenient and efficient operation, greatly improving the efficiency of installation and disassembly, demonstrating extremely high tool compatibility.
[0026] Furthermore, the bolts, receiving platforms, washers, and hexagonal heads of this application are manufactured using a one-piece molding process. This one-piece manufacturing method avoids the connection gaps and weak points caused by splicing multiple parts. From the perspective of material mechanics, the components form a continuous and uniform integral structure, effectively reducing stress concentration points, thereby significantly improving the strength and reliability of the entire bolt fastener and ensuring stable operation even under complex working conditions.
Claims
1. A locking bolt fastener for preventing loosening, characterized in that: The device includes a screw, the outer surface of which is threaded, the thread being a left-hand thread, a washer fixedly connected to one end of the screw, the cross-sectional area of the washer being larger than the cross-sectional area of the screw, and a turning end fixedly connected to the end of the washer away from the screw, the axes of the screw, the washer and the turning end being located on the same straight line.
2. The anti-loosening locking bolt fastener according to claim 1, characterized in that: A guide groove is formed on the arc surface of the screw. The guide groove is straight and parallel to the axis of the screw. One end of the guide groove passes through the end of the screw away from the washer.
3. The anti-loosening locking bolt fastener according to claim 1, characterized in that: The gasket has symmetrical and fixedly connected receiving platforms on both sides. The two receiving platforms are concentric with the gasket. The outer arc surface of the receiving platform is provided with a sealing groove for placing the sealing ring. The sealing groove is arranged in a ring and is concentric with the receiving platform.
4. The anti-loosening locking bolt fastener according to claim 1, characterized in that: The screwing end includes a hexagonal head, which is fixed to one end of the washer.
5. The anti-loosening locking bolt fastener according to claim 3, characterized in that: The cross-sectional area of the receiving platform is larger than that of the screw.