Anti-whirl expansion joint

Abstract

This utility model relates to an anti-rotation telescopic sleeve, belonging to the technical field of telescopic sleeves. It includes an inner tube, a middle tube, and an outer tube. The outer tube is slidably sleeved on the outside of the middle tube, and the middle tube is slidably sleeved on the outside of the inner tube. A locking buckle A is fixedly installed at the first end of the middle tube; a locking buckle B is fixedly installed at the first end of the outer tube. Locking buckle A and locking buckle B have the same structure. An outer boss A is provided on the outer wall of the tail end of the inner tube, and a flat opening A is machined on the outer boss A. A flat opening B is machined on the inner wall of the middle tube, and a flat opening C is machined on the outer boss B. A flat opening D is machined on the inner wall of the outer tube, and a flat opening C is machined on the inner wall of the outer tube. This utility model, by providing flat openings on both the inner and middle tubes, and through the cooperation between these flat openings, forms a constraint on the middle and inner tubes, thereby preventing relative rotation between the tubes. This utility model can effectively prevent relative rotation between the sleeves, has a simple and reliable structure, and is convenient to use.

Description

Technical Field

[0001] This utility model relates to an anti-rotation telescopic sleeve, belonging to the technical field of telescopic sleeves. Background Technology

[0002] Telescopic sleeves are tubular components whose length can be adjusted through axial sliding or nesting structures. They are widely used in scenarios requiring dynamic expansion or spatial adaptation, and are found in industries such as manufacturing, construction, and machinery. Existing telescopic sleeves typically use locking clips to clamp adjacent sleeves to increase friction and prevent relative rotation between sections. However, due to their shape, this method is unreliable. Even after the clips are tightened, rotation can easily occur between the sleeves under certain force, affecting normal use. Utility Model Content

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by this utility model is to provide an anti-rotation telescopic sleeve that can effectively prevent relative rotation between sleeves, has a reliable structure, and is easy to use.

[0004] The anti-rotation telescopic sleeve of this utility model includes an inner tube, a middle tube, and an outer tube. The outer tube is slidably sleeved on the outside of the middle tube, and the middle tube is slidably sleeved on the outside of the inner tube. The outer diameter of the inner tube is adapted to the inner diameter of the middle tube, and the outer diameter of the middle tube is adapted to the inner diameter of the outer tube. A locking buckle A is fixedly installed at the first end of the middle tube, and the locking buckle A is adapted to the diameter of the middle tube. A locking buckle B is fixedly installed at the first end of the outer tube, and the locking buckle B is adapted to the diameter of the outer tube. The locking buckles A and B have the same structure and can lock the relative positions of the inner tube, the middle tube, and the outer tube. The outer wall of the tail end of the inner tube is provided with an outer boss A, and a flat opening A is machined on the outer boss A. The inner wall of the middle tube is machined with a flat opening B that fits and conforms to the flat opening A. The cooperation between the flat opening B and the flat opening A constrains the inner tube and prevents it from rotating. The outer wall of the tail end of the intermediate tube is provided with an outer boss B, and a flat opening C is machined on the outer boss B. The inner wall of the outer tube is machined with a flat opening D that fits and matches the flat opening C. The intermediate tube is constrained by the cooperation of the flat opening C and the flat opening D to prevent it from rotating.

[0005] The technical solution of this utility model is to provide an anti-rotation telescopic sleeve, which is provided with flat openings in the inner tube, outer tube and middle tube. The cooperation between the flat openings forms a constraint on the middle tube and the inner tube, so as to avoid relative rotation between the tubes.

[0006] Preferably, the first end of the intermediate tube is provided with double-sided protrusions A. The inner side of the double-sided protrusions A can cooperate with the outer protrusions A to prevent the inner tube from coming out of the intermediate tube. The outer side of the double-sided protrusions A can cooperate with the inner protrusions A on the latch A to prevent the latch A from separating from the intermediate tube.

[0007] Preferably, the outer tube has a double-sided protrusion B at its head end. The inner side of the double-sided protrusion B can cooperate with the outer protrusion B to prevent the middle tube from coming out of the outer tube. The outer side of the double-sided protrusion B can cooperate with the inner protrusion B on the latch B to prevent the latch B from separating from the outer tube.

[0008] Preferably, the double-sided bosses A of the intermediate tube are machined with limiting grooves A, and the inner wall of the latch A is provided with a limiting platform A that cooperates with the limiting grooves A. The cooperation between the limiting grooves A and the limiting platform A prevents the latch A from rotating relative to the intermediate tube. The double-sided bosses B of the outer tube are machined with limiting grooves B, and the inner wall of the latch B is provided with a limiting platform B that cooperates with the limiting grooves B. The cooperation between the limiting grooves B and the limiting platform B prevents the latch B from rotating relative to the outer tube.

[0009] Preferably, the latch A has an arc-shaped groove so that the two sides of the latch A can move separately. The latch A and the inner tube are fitted with bolts and nuts. The inner wall of the latch A and the inner tube is provided with rubber gaskets. After tightening the bolts and nuts, the inner tube can be pressed and locked by the rubber gaskets.

[0010] Preferably, the number of intermediate tubes is at least one.

[0011] The advantages of this utility model compared with the prior art are: The anti-rotation telescopic sleeve of this utility model has flat openings in the inner tube, outer tube, and middle tube. The fit between these flat openings forms a constraint on the middle tube and the inner tube, thereby preventing relative rotation between the tubes. This utility model can effectively prevent relative rotation between the sleeves, and has a simple and reliable structure and is easy to use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is an exploded view of the present invention; Figure 3 This is a cross-sectional view of the present invention; Figure 4 This is a cross-sectional view of the intermediate tube; Figure 5 This is a cross-sectional view of the outer tube; Figure 6 This is a schematic diagram of the structure of latch A.

[0013] In the diagram: 1. Inner tube; 11. Outer boss A; 111. Flat end A; 2. Middle tube; 21. Outer boss B; 211. Flat end C; 22. Flat end B; 23. Double-sided boss A; 231. Limiting groove A; 3. Outer tube; 31. Flat end D; 32. Double-sided boss B; 321. Limiting groove B; 4. Lock B; 5. Lock A; 51. Bolt; 52. Nut; 53. Arc groove; 54. Rubber gasket; 55. Limiting platform A; 56. Inner boss A. Detailed Implementation

[0014] The present invention will be further described below with reference to specific embodiments.

[0015] like Figures 1-6 As shown, this embodiment is achieved through the following technical solution: including an inner tube 1, a middle tube 2 and an outer tube 3, the outer tube 3 is slidably sleeved on the outside of the middle tube 2, the middle tube 2 is slidably sleeved on the outside of the inner tube 1, the outer diameter of the inner tube 1 is adapted to the inner diameter of the middle tube 2, the outer diameter of the middle tube 2 is adapted to the inner diameter of the outer tube 3, and the inner tube 1, the middle tube 2 and the outer tube 3 are all made of carbon fiber. A locking buckle A5 is fixedly installed at the first end of the intermediate tube 2, and the locking buckle A5 is compatible with the diameter of the intermediate tube 2; a locking buckle B4 is fixedly installed at the first end of the outer tube 3, and the locking buckle B4 is compatible with the diameter of the outer tube 3; the locking buckles A5 and B4 have the same structure, and the relative positions of the inner tube 1, the intermediate tube 2 and the outer tube 3 can be locked by locking buckles A5 and B4; the outer wall of the tail end of the inner tube 1 is provided with an outer boss A11, and a flat opening A111 is machined on the outer boss A11; the inner wall of the intermediate tube 2 is machined with a flat opening B22 that fits and matches the flat opening A111. The inner tube 1 is constrained by the cooperation of the flat opening B22 and the flat opening A111 to prevent it from rotating. The outer wall of the tail end of the intermediate tube 2 is provided with an outer boss B21, and a flat end C211 is machined on the outer boss B21. The inner wall of the outer tube 3 is machined with a flat end D31 that fits and matches the flat end C211. The intermediate tube 2 is constrained by the cooperation of the flat end C211 and the flat end D31 to prevent it from rotating.

[0016] In this embodiment, the number of intermediate tubes 2 is one; the first end of the intermediate tube 2 is provided with double-sided protrusions A23, the inner side of the double-sided protrusions A23 can cooperate with the outer protrusions A11 to prevent the inner tube 1 from coming out of the intermediate tube 2, and the outer side of the double-sided protrusions A23 can cooperate with the inner protrusions A56 on the latch A5 to prevent the latch A5 from separating from the intermediate tube 2.

[0017] The outer tube 3 is provided with double-sided protrusions B32 at its first end. The inner side of the double-sided protrusions B32 can cooperate with the outer protrusion B21 to prevent the middle tube 2 from falling out of the outer tube 3. The outer side of the double-sided protrusions B32 can cooperate with the inner protrusion B on the latch B4 to prevent the latch B4 from separating from the outer tube 3.

[0018] The intermediate tube 2 has a limiting groove A231 machined on the double-sided boss A23, and the inner wall of the latch A5 is provided with a limiting platform A55 that cooperates with the limiting groove A231. The limiting platform A55 is inserted into the limiting groove A231. The cooperation between the limiting groove A231 and the limiting platform A55 prevents the latch A5 from rotating relative to the intermediate tube 2. The outer tube 3 has a limiting groove B321 machined on the double-sided boss B32, and the inner wall of the latch B4 is provided with a limiting platform B that cooperates with the limiting groove B321. The cooperation between the limiting groove B321 and the limiting platform B prevents the latch B4 from rotating relative to the outer tube 3.

[0019] The latch A5 has an arc-shaped groove 53 so that the two sides of the latch A5 can move respectively. The latch A5 is fitted with a bolt 51 and a nut 52 on the locking side with the inner tube 1. The inner wall of the latch A5 on the locking side with the inner tube 1 is provided with a rubber gasket 54. After tightening the bolt 51 and the nut 52, the inner tube 1 can be pressed and locked by the rubber gasket 54.

[0020] The working principle of this utility model is as follows: When the sleeve needs to be extended, the bolts and nuts on each lock can be loosened, adjusted to the appropriate length, and then the bolts and nuts can be tightened again. Since the outer diameter of the inner tube 1 is matched with the inner diameter of the middle tube 2, and the outer diameter of the middle tube 2 is matched with the inner diameter of the outer tube 3, and the flat opening A111 and the flat opening B22 are fitted together to form a constraint, and the flat opening C211 and the flat opening D31 are fitted together to form a constraint, relative rotation between the tubes can be avoided.

[0021] Of course, the above description is only a preferred embodiment of this utility model and should not be considered as limiting the scope of the embodiments of this utility model. This utility model is not limited to the above examples, and all equivalent changes and improvements made by those skilled in the art within the scope of this utility model should be included in the patent coverage of this utility model.

Claims

1. A telescopic sleeve for preventing rotation, characterized in that, The device includes an inner tube (1), a middle tube (2), and an outer tube (3). The outer tube (3) is slidably sleeved on the outside of the middle tube (2), and the middle tube (2) is slidably sleeved on the outside of the inner tube (1). The outer diameter of the inner tube (1) is matched with the inner diameter of the middle tube (2), and the outer diameter of the middle tube (2) is matched with the inner diameter of the outer tube (3). A locking buckle A (5) is fixedly installed at the head end of the middle tube (2), and the locking buckle A (5) is matched with the diameter of the middle tube (2). A locking buckle B (4) is fixedly installed at the head end of the outer tube (3), and the locking buckle B (4) is matched with the diameter of the outer tube (3). The locking buckle A (5) and the locking buckle B (4) have the same structure. The outer wall of the tail end of the inner tube (1) is provided with an outer boss A (11), and a flat opening A (111) is machined on the outer boss A (11). The inner wall of the middle tube (2) is machined with a flat opening B (22) that fits and is close to the flat opening A (111). The outer wall of the tail end of the intermediate tube (2) is provided with an outer boss B (21), and a flat opening C (211) is machined on the outer boss B (21). The inner wall of the outer tube (3) is machined with a flat opening D (31) that fits the flat opening C (211).

2. The anti-rotation telescopic sleeve according to claim 1, characterized in that, The middle tube (2) is provided with double-sided protrusions A (23) at the first end. The inner side of the double-sided protrusions A (23) can cooperate with the outer protrusions A (11) to prevent the inner tube (1) from coming out of the middle tube (2). The outer side of the double-sided protrusions A (23) can cooperate with the inner protrusions A (56) on the latch A (5) to prevent the latch A (5) from separating from the middle tube (2).

3. The anti-rotation telescopic sleeve according to claim 2, characterized in that, The outer tube (3) is provided with double-sided protrusions B (32) at the first end. The inner side of the double-sided protrusions B (32) can cooperate with the outer protrusions B (21) to prevent the middle tube (2) from falling out of the outer tube (3). The outer side of the double-sided protrusions B (32) can cooperate with the inner protrusions B on the latch B (4) to prevent the latch B (4) from separating from the outer tube (3).

4. The anti-rotation telescopic sleeve according to claim 3, characterized in that, The intermediate tube (2) has a limiting groove A (231) machined on the double-sided boss A (23), and the inner wall of the latch A (5) is provided with a limiting platform A (55) that cooperates with the limiting groove A (231); the outer tube (3) has a limiting groove B (321) machined on the double-sided boss B (32), and the inner wall of the latch B (4) is provided with a limiting platform B that cooperates with the limiting groove B (321).

5. The anti-rotation telescopic sleeve according to claim 1, characterized in that, The latch A (5) is provided with an arc groove (53), and bolts (51) and nuts (52) are installed on the locking side of the latch A (5) and the inner tube (1). A rubber gasket (54) is provided on the inner wall of the locking side of the latch A (5) and the inner tube (1).

6. The anti-rotation telescopic sleeve according to claim 1, characterized in that, The number of intermediate tubes (2) is at least one.

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