Multi-layer telescopic sleeve structure capable of preventing swinging and deflection blocking
By setting a positioning ring and a guide ring in the sleeve structure and forming an annular gap between adjacent sleeves, the problem of easy swing and deflection of the traditional sleeve structure leads to jamming, and the stable expansion and contraction of the sleeve is achieved.
Patent Information
- Application Number
- CN202421298303.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-07
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-06-07
AI Technical Summary
Traditional casing structures are prone to swing and deflection during use, resulting in clogging problems.
A multi-layer telescopic sleeve structure is designed, in which a downward positioning ring is provided on the outer wall of the top end of the innermost sleeve and the middle layer casing, an upward positioning ring is provided on the outer wall of the bottom end, and a guide ring is provided on the inner wall of the top end of the middle layer and the outermost sleeve. The limit ring is also spaced below the guide ring to ensure that an annular gap is formed between the adjacent sleeves. The distance between the guide ring and the limit ring is 10%-15% of the length of the sleeve, and the gap is used to prevent swing and deflection.
It effectively avoids swing and deflection of the sleeve during expansion and contraction, ensures smooth sliding and prevents jamming.
Smart Images
Figure CN222334192U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a telescopic sleeve structure, in particular to a multi-layer telescopic sleeve structure which can prevent swinging and deflection jamming. Background Art
[0002] During the process of studying the sand and gravel dust-proof dropper, the inventor found that when the traditional sleeve telescopic structure is fully expanded, the upward positioning ring is in direct contact with the guide ring with almost no overlapping section. Therefore, the rigidity is poor during use and it is easy to swing and deflect under external force. Therefore, it is very easy to cause jamming when retracting the sleeve. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide a multi-layer telescopic sleeve structure which can prevent swinging and deflection jamming, so as to solve the technical problems in the above-mentioned background technology.
[0004] The technical solution of the utility model is:
[0005] A multi-layer telescopic sleeve structure capable of preventing swinging and deflection jamming comprises a plurality of mutually nested sleeves, wherein the inner diameter of the outer sleeve is larger than the outer diameter of the adjacent inner sleeve, thereby forming an annular gap between the adjacent sleeves; the innermost sleeve and the top outer wall of all the intermediate sleeves are provided with a downward positioning ring, and the bottom outer wall is provided with an upward positioning ring; the top inner wall of all the intermediate sleeves and the outermost sleeve is provided with a guide ring, and a limit ring is provided below the guide ring at a certain interval.
[0006] Furthermore, the diameter differences of adjacent casings are equal, thereby forming annular gaps of equal width between adjacent casings, wherein the widths of the upward positioning ring, the guide ring, and the limit ring are consistent with the annular gap, and clearance fit is used to ensure smooth sliding.
[0007] Furthermore, the distance between the guide ring and the limit ring is 10%-15% of the length of the casing.
[0008] The utility model is beneficial in that:
[0009] When the sleeve is extended, the upward positioning ring of the inner sleeve slides to the position of the limit ring of the adjacent outer sleeve and will not slide anymore, while the upper part is positioned by the guide ring of the outer sleeve. In this way, when the adjacent sleeves are fully stretched, the inner sleeve and the outer sleeve still have a section of overlapping length, and the upper and lower sides of this length are positioned by the limit ring and the guide ring respectively, so that swinging and deflection will not occur, thereby effectively avoiding jamming. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the structure of the utility model;
[0011] Figure 2 This is a cross-sectional view of the utility model;
[0012] Figure 3 for Figure 2 A schematic diagram of the enlarged part A in FIG.
[0013] Figure 4 for Figure 2 Enlarged schematic diagram of local B in the figure.
[0014] In the figure: 1- casing, 2- downlink positioning ring, 3- guide ring, 4- annular gap, 5- limit ring, 6- uplink positioning ring. DETAILED DESCRIPTION
[0015] The specific implementation methods of the present invention are further described below in conjunction with the accompanying drawings. It should be noted that the description of these implementation methods is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each implementation method of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0016] like Figure 1-4 As shown:
[0017] A multi-layer telescopic sleeve structure capable of preventing swinging and deflection jamming comprises a plurality of mutually nested sleeves 1, wherein the inner diameter of the outer sleeve 1 is larger than the outer diameter of the adjacent inner sleeve 1, thereby forming an annular gap 4 between the adjacent sleeves 1; the top outer wall of the innermost sleeve 1 and all the intermediate sleeves 1 is provided with a downward positioning ring 2, and the bottom outer wall is provided with an upward positioning ring 6; the top inner wall of all the intermediate sleeves 1 and the outermost sleeve 1 is provided with a guide ring 3, and a limit ring 5 is provided below the guide ring 3 at a certain interval.
[0018] The utility model is located below the guide ring 3 and is spaced a certain distance apart. As for how far the distance is, it is determined by the length of the sleeve 1. The longer the sleeve 1 is, the longer the required distance is. The distance between the guide ring 3 and the limit ring 5 can be 10%-15% of the length of the sleeve 1.
[0019] When the sleeve 1 is extended, the upward positioning ring 6 of the inner sleeve 1 slides to the position of the limit ring 5 of the adjacent outer sleeve 1 and will not slide anymore, while the upper part is positioned by the guide ring 3 of the outer sleeve 1. In this way, when the adjacent sleeves 1 are fully stretched, the inner sleeve 1 and the outer sleeve 1 still have a section of overlapping length, and the upper and lower sides of this length are positioned by the limit ring 5 and the guide ring 3 respectively, so that swinging and deflection will not occur, thereby effectively avoiding jamming.
[0020] As an optimization solution, the diameter differences of adjacent casings 1 are equal, so that annular gaps 4 of equal width are formed between adjacent casings 1, wherein the widths of the upward positioning ring 6, the guide ring 3, and the limit ring 5 are consistent with the annular gap 4, and clearance fit is used to ensure smooth sliding.
[0021] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments are made without departing from the principles and spirit of the present invention, and still fall within the scope of protection of the present invention.
Claims
1. A multi-layer telescopic sleeve structure capable of preventing swinging and deflection jamming, characterized in that: It comprises multiple layers of mutually nested casings, wherein the inner diameter of the outer casing is larger than the outer diameter of the adjacent inner casing, thereby forming an annular gap between the adjacent casings; the innermost casing and the top outer wall of all the intermediate casings are provided with a downward positioning ring, and the bottom outer wall is provided with an upward positioning ring; the top inner wall of all the intermediate casings and the outermost casing is provided with a guide ring, and a limit ring is provided below the guide ring at a certain interval.
2. The multi-layer telescopic sleeve structure capable of preventing swinging and deflection jamming according to claim 1, characterized in that: The diameter differences of adjacent casings are equal, thus forming annular gaps of equal width between adjacent casings, wherein the widths of the upward positioning ring, guide ring, and limit ring are consistent with the annular gap, and clearance fit is used to ensure smooth sliding.
3. The multi-layer telescopic sleeve structure capable of preventing swinging and deflection jamming according to claim 1 or 2, characterized in that: The distance between the guide ring and the limiting ring is 10%-15% of the length of the casing.