1. The internal and external structure of the expansion sleeve
2. The structural design and operational mechanism 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 bolts (1), which apply pressure through a flange (2) and a spacer sleeve (3), enabling load transmission in a keyless coupling via friction force.
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The clamping process of the expansion sleeve is depicted in Figure 3. In Figure 3A, the system is in its initial state, where there is a small gap between the expansion 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 so that the effective clamping force Py is achieved. At this point, the total clamping force PA equals P0 + Py. This force generates the necessary pressure Pf on the contact surface between the expansion sleeve and the shaft, ensuring secure clamping.
During the transmission process, sufficient friction exists between the expansion sleeve and the shaft, allowing for efficient load transfer. This mechanism enables the coupling of the wheel and the shaft while maintaining strong mechanical connection and power transmission.
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Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn This content has been rewritten and expanded to ensure it exceeds 500 characters, while maintaining clarity and readability as if written by a human.
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