1. The internal and external structure of the expansion sleeve
2. The structural design and working principle of the expansion sleeve in the clamping process
Figure 1 shows a basic version of the expansion sleeve, which consists of an outer ring (1) and an inner ring (2). These components are designed to fit with the hub and the shaft, respectively. Figure 2 illustrates the situation where the expansion sleeve is clamped onto the hub. The sleeve is manufactured by tightening high-strength screws (1), which apply pressure through the flange (2) and the spacer sleeve (3). This pressure creates friction between the expansion sleeve and the shaft, enabling load transmission in a keyless coupling system.
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The clamping process of the expansion sleeve is shown in Figure 3. In Figure 3A, the sleeve is in its initial state, with a small gap between the sleeve and both the hub and the shaft. When the screw is tightened, an axial force (P0) is applied to the expansion surface, causing the outer ring to move axially and deform radially, thereby eliminating the gap (as shown in Figure 3B). To transmit a specific load, the screw is further tightened, increasing the clamping force to Py. At this point, the total clamping force becomes PA = P0 + Py, which generates the necessary pressure Pf on the contact surface between the sleeve and the shaft. This pressure ensures a secure grip, allowing the sleeve to hold the shaft firmly in place.
During operation, sufficient friction is maintained between the expansion sleeve and the shaft, enabling the transfer of torque and load without the need for keys or other mechanical fasteners. This mechanism effectively couples the wheel to the shaft while ensuring reliable and stable performance under various loading conditions.
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Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn This detailed explanation highlights how the expansion sleeve functions as a critical component in mechanical systems, offering a simple yet efficient method for secure and durable coupling. Its design allows for easy installation and maintenance, making it a popular choice in industrial applications.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn This detailed explanation highlights how the expansion sleeve functions as a critical component in mechanical systems, offering a simple yet efficient method for secure and durable coupling. Its design allows for easy installation and maintenance, making it a popular choice in industrial applications.
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