Threaded expansion sleeve

Abstract

The utility model discloses a thread expansion sleeve which comprises a conical ring and an expansion ring, a fixing portion is fixedly arranged on the side, located in the radial direction of the expansion ring, of the conical ring, a top plate right corresponding to the end face of the expansion ring is arranged between the fixing portion and the expansion ring, and the top plate is arranged around the circle center of the expansion ring in a surrounding mode. A fastener for driving the expansion ring to move towards one side of the top plate is arranged on the conical ring and located on the other side, opposite to the top plate, of the expansion ring, a linkage assembly is connected between the fastener and the top plate, and the fastener drives the top plate to move along the axis of the conical ring and opposite to the fixing part through the linkage assembly. The expansion sleeve has the following advantages and effects that the expansion sleeve is more convenient to disassemble, so that the later normal maintenance of the expansion sleeve is ensured, and the service life of the expansion sleeve is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of transmission machinery, in particular to a thread expansion sleeve. Background Art

[0002] The expansion sleeve is a transmission component of mechanical connection, mainly used to achieve a tight connection between shafts or shafts and holes. It transmits torque and axial force through the friction force generated by the elastic deformation of the expansion sleeve. The design and application of the expansion sleeve can avoid the stress concentration problem that may occur when using key connection. At the same time, it has the advantages of simple structure, easy assembly and disassembly, and high centering accuracy.

[0003] The expansion sleeve relies on frictional force to transmit the torque between the connecting parts. After long-term use, it is easy to cause the expansion ring in the expansion sleeve and the connecting part to get stuck or even stuck due to corrosion caused by external environmental factors. Therefore, a top hole is set on the existing expansion sleeve, and the expansion ring and the connecting part are separated by a bolt thread connected to the top hole. However, this structure can only apply an ejection force along the axis of the expansion ring by tightening the bolts one by one. In addition, the action position of the bolt force is located at the eccentric position of the expansion sleeve. When the staff cannot better control the ejection stroke of each bolt during operation, it is easy to cause a large lateral force on the expansion ring, causing it to have a large deviation phenomenon, which eventually causes the expansion ring to be stuck and damaged, affecting the normal maintenance in the later stage and the service life of the expansion sleeve. Utility Model Content

[0004] The utility model aims to provide a thread expansion sleeve, which is more convenient to disassemble, thereby ensuring normal maintenance of the expansion sleeve in the later stage and extending its service life.

[0005] The above technical purpose of the utility model is achieved through the following technical solutions: a threaded expansion sleeve, including a tapered ring and a clamping ring, the tapered ring is fixedly provided with a fixing portion on one radial side of the clamping ring, a top plate corresponding to the end face of the clamping ring is provided between the fixing portion and the clamping ring, the top plate is arranged around the center of the clamping ring, a fastener for driving the clamping ring to move toward one side of the top plate is provided on the tapered ring at the other side of the clamping ring relative to the top plate, a linkage assembly is connected between the fastener and the top plate, and the fastener drives the top plate to move along the axis of the tapered ring away from the fixing portion through the linkage assembly.

[0006] By adopting the above technical solution, the fastener drives the expansion ring to move toward one side of the top plate to achieve the purpose of expansion of the expansion sleeve. When the expansion sleeve needs to be disassembled and maintained, the fastener is rotated in the opposite direction to move the expansion ring and cooperate with the linkage assembly and the top plate to drive the expansion ring to move against the side of the top plate, so as to separate the expansion ring from the connecting component. The expansion ring is uniformly applied along the circumferential axis of the conical ring by surrounding the top plate to avoid the deviation of the expansion ring caused by lateral force, so as to achieve convenient disassembly of the expansion sleeve, ensure the normal maintenance of the expansion sleeve in the later stage, and extend its service life.

[0007] It is further configured as follows: the fastener is a fastening block threadedly connected to the tapered ring, and the fastening block is coaxially arranged with the tapered ring.

[0008] By adopting the above technical solution, the coaxial and threaded fastening block can exert a balanced force along the axis of the tapered ring to avoid the formation of lateral force, thereby cooperating with the linkage assembly and the top plate to achieve balanced force on the expansion ring.

[0009] It is further configured as follows: the linkage assembly includes at least two expansion gaps formed in the expansion ring, at least two linkage hooks arranged on the top plate and extending toward one side of the fastening block through the expansion gaps, and a linkage ring that moves with the fastening block and is linked with each linkage hook along one side of the opposite fixed part, the linkage hooks correspond one-to-one to the expansion gaps, and the expansion gaps divide the expansion ring into at least two ring bodies.

[0010] By adopting the above technical solution, the fastening block drives the linkage ring to move and cooperates with the linkage hook to drive the side of the top plate opposite to the fixed part to move, so as to separate the expansion ring from the connecting component. And the linkage hook that is linked with the linkage ring through the expansion gap will not affect the normal expansion operation of the expansion ring and will not cause structural interference.

[0011] It is further configured as follows: the linkage ring is rotatably mounted on the fastening block and the fastening block limits the linkage ring from moving toward the fixed part; the linkage ring is located on the side of the linkage hook part close to the fixed part and the positive projection of the linkage hook part along the axis of the conical ring is located on the linkage ring.

[0012] By adopting the above technical solution, the fastening block drives the linkage ring to move in opposite directions to the expansion ring, and the linkage between the linkage ring and the top plate is realized by the linkage ring counteracting the linkage hook part, which has a simple structure and is easy to process.

[0013] It is further configured that: each of the linkage hook parts is provided with a limiting protrusion protruding outward, and the linkage ring is provided with a limiting hole for the limiting protrusion to be embedded in, corresponding to the positive projection position of each limiting protrusion along the axis of the conical ring.

[0014] By adopting the above technical solution, the limiting protrusion cooperates with the limiting hole to further limit the linkage position of the linkage ring and the linkage hook, thereby improving the structural strength of the linkage between the two and improving the reliability of the structure.

[0015] It is further configured as follows: a reinforcing rib is provided between each of the linkage hooks and the top plate.

[0016] By adopting the above technical solution, the reinforcement ribs are provided to improve the structural strength of the linkage hook, thereby improving the reliability and stability of the structure.

[0017] In summary, the utility model has the following beneficial effects: the utility model is more convenient to disassemble, thereby ensuring the normal maintenance of the expansion sleeve in the later stage and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of an embodiment;

[0019] Figure 2 is a cross-sectional view of an embodiment;

[0020] Figure 3 It is a partial structural schematic diagram of an embodiment;

[0021] Figure 4 An exploded view of an embodiment.

[0022] In the figure: 1. conical ring; 2. fixing part; 3. top plate; 4. fastener; 5. linkage assembly; 51. expansion gap; 52. linkage hook; 53. linkage ring; 6. ring body; 7. limiting protrusion; 8. limiting hole; 9. reinforcing rib. DETAILED DESCRIPTION

[0023] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] refer to Figures 1 to 4 A threaded expansion sleeve includes a tapered ring 1 and an expansion ring. The tapered ring 1 is integrally provided with a fixing portion 2 located on one radial side of the expansion ring. A top plate 3 corresponding to the end face of the expansion ring is provided between the fixing portion 2 and the expansion ring. The top plate 3 is arranged around the center of the expansion ring to form a ring. A fastener 4 for driving the expansion ring to move toward one side of the top plate 3 is provided on the tapered ring 1 at the other side of the expansion ring relative to the top plate 3. A linkage assembly 5 is connected between the fastener 4 and the top plate 3, and the fastener 4 drives the top plate 3 to move along the axis of the tapered ring 1 away from the fixing portion 2 through the linkage assembly 5.

[0025] The fastener 4 is a fastening block threadedly connected to the tapered ring 1, and the fastening block is coaxially arranged with the tapered ring 1. The linkage assembly 5 includes at least two expansion gaps 51 formed in the expansion ring, at least two linkage hooks 52 integrally arranged on the top plate 3 and extending toward one side of the fastening block through the expansion gaps 51, and a linkage ring 53 that moves with the fastening block and forms a linkage with each linkage hook 52 along one side in the direction opposite to the fixing portion 2. The number of linkage hooks 52 corresponds to the number of expansion gaps 51, and the expansion gaps 51 divide the expansion ring into at least two ring bodies 6.

[0026] The linkage ring 53 is rotatably mounted on the fastening block and the fastening block limits the linkage ring 53 from moving toward the fixed part 2. The linkage ring 53 is located on the side of the linkage hook 52 near the fixed part 2 and the orthographic projection of the linkage hook 52 along the axis of the conical ring 1 is located on the linkage ring 53. Each linkage hook 52 is integrally provided with a limiting protrusion 7 protruding outward, and the linkage ring 53 is provided with a limiting hole 8 for the limiting protrusion 7 to be embedded in the orthographic projection position of each limiting protrusion 7 along the axis of the conical ring 1. A reinforcing rib 9 is integrally provided between each linkage hook 52 and the top plate 3.

[0027] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A threaded expansion sleeve, comprising a tapered ring (1) and a tightening ring, characterized in that: The conical ring (1) is fixedly provided with a fixing portion (2) on one radial side of the expansion ring, a top plate (3) corresponding to the end face of the expansion ring is provided between the fixing portion (2) and the expansion ring, and the top plate (3) is arranged around the center of the expansion ring, and a fastener (4) for driving the expansion ring to move toward one side of the top plate (3) is provided on the conical ring (1) on the other side of the expansion ring relative to the top plate (3), a linkage assembly (5) is connected between the fastener (4) and the top plate (3), and the fastener (4) drives the top plate (3) to move along the axis of the conical ring (1) away from the fixing portion (2) through the linkage assembly (5).

2. The threaded expansion sleeve according to claim 1, characterized in that: The fastener (4) is a fastening block threadedly connected to the conical ring (1), and the fastening block is coaxially arranged with the conical ring (1).

3. The threaded expansion sleeve according to claim 2, characterized in that: The linkage assembly (5) comprises at least two expansion gaps (51) formed in the expansion ring, at least two linkage hooks (52) arranged on the top plate (3) and extending through the expansion gaps (51) toward one side of the fastening block, and a linkage ring (53) that moves with the fastening block and forms a linkage with each linkage hook (52) along one side in the direction opposite to the fixed portion (2), the linkage hooks (52) corresponding one to one with the expansion gaps (51), and the expansion gaps (51) divide the expansion ring into at least two ring bodies (6).

4. The threaded expansion sleeve according to claim 3, characterized in that: The linkage ring (53) is rotatably mounted on the fastening block, and the fastening block restricts the linkage ring (53) from moving toward one side of the fixed portion (2). The linkage ring (53) is located on the side of the hook portion of the linkage hook (52) close to the fixed portion (2), and the positive projection of the hook portion of the linkage hook (52) along the axis of the conical ring (1) is located on the linkage ring (53).

5. The threaded expansion sleeve according to claim 4, characterized in that: Each of the linkage hooks (52) is provided with a limiting protrusion (7) protruding outward, and the linkage ring (53) is provided with a limiting hole (8) for the limiting protrusion (7) to be embedded in, corresponding to the positive projection position of each limiting protrusion (7) along the axis of the conical ring (1).

6. The threaded expansion sleeve according to claim 3, characterized in that: A reinforcing rib (9) is provided between each linkage hook (52) and the top plate (3).

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