A double-sleeve dustproof cylinder

Abstract

The utility model belongs to the technical field of dustproof cylinder of bolt, specifically relates to a double-sleeve type dustproof cylinder, including the outer cover that is buried in the ground and the inner cylinder that can slide up and down in the outer cover, and the inner cylinder is sequentially assembled with positioning pin, spring base, compression spring and upper cover. The both ends of positioning pin stretch out from the outside surface of dustproof cover, be provided with at least one group of annular guide groove that distributes along the axis on the inner wall of outer cover, and the sliding slot that sets up axially, the sliding slot connects each annular guide groove. Compared with prior art, the application has the following beneficial effects: the dustproof cylinder height can be adjusted, and the operation is convenient, safe and beautiful.

Description

Technical Field

[0001] This utility model belongs to the technical field of pin-type dustproof cylinders, specifically relating to a double-sleeve dustproof cylinder. Background Technology

[0002] Existing dustproof cylinders for elephant gates are typically buried directly in the ground and cannot be adjusted in height. When the elephant gate is located on a steep slope and opens outwards at a 90-degree angle, the gap between the gate and the ground increases, preventing the latch from properly inserting into the dustproof cylinder and thus preventing the main gate from opening and positioning at 90 degrees. To solve this problem, a heightening pad is usually used, but this method causes the dustproof cylinder to protrude significantly from the ground, easily tripping pedestrians and severely affecting the aesthetics.

[0003] Therefore, based on some of the situations in the prior art described above, this application has made further designs and improvements. Utility Model Content

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0005] A double-sleeve dustproof sleeve includes an outer sleeve buried in the ground and an inner sleeve that can slide up and down inside the outer sleeve. A positioning pin, a spring base, a compression spring, and a top cover are sequentially assembled inside the inner sleeve. The two ends of the positioning pin extend from the outer surface of the dustproof sleeve. At least one set of axially distributed annular guide grooves and an axially arranged sliding groove are provided on the inner wall of the outer sleeve, with the sliding groove connecting each annular guide groove.

[0006] As a preferred technical solution for a double-sleeve dustproof casing, the top of the inner cylinder is provided with a limiting end cap, and the limiting end cap has an insertion hole in the middle, with the upper cover abutting against the insertion hole. This effectively prevents dust and other impurities from entering the internal space, improving the product's ease of use and maintenance efficiency.

[0007] As a preferred technical solution for a double-sleeve dustproof sleeve, the outer diameter of the limiting end cap is larger than the outer diameter of the top of the outer sleeve. This design can reduce the entry of dust and other impurities into the gap between the outer sleeve and the inner sleeve.

[0008] As a preferred technical solution for a double-sleeve dustproof cylinder, the limiting end cap is equipped with a retractable pull ring for pulling the inner cylinder up and down, making it convenient for users to adjust the height of the inner cylinder.

[0009] As a preferred technical solution for a double-sleeve dustproof sleeve, a positioning groove is provided on the annular guide groove, which is used to fix the position of the positioning pin.

[0010] As a preferred technical solution for a double-sleeve dustproof casing, the inner cylinder and the spring base are connected through each other, and the bottom of the outer sleeve is provided with a drainage hole. This design facilitates the drainage of moisture or other liquids that may accumulate inside the dustproof casing, thereby reducing the risk of corrosion and extending its service life.

[0011] Compared with the prior art, this application has the following beneficial effects:

[0012] 1. Adjustable height: The double sleeve structure allows for height adjustment based on the gap between the door and the ground, adapting to the needs of different scenarios.

[0013] 2. Easy to operate: The pull ring design makes it easy for users to adjust the height of the dust cover, and the operation is simple and convenient.

[0014] 3. Aesthetically pleasing and safe: The height of the dust cover is adjustable, and the inner tube can be retracted when not in use to avoid protruding from the ground, thus improving both aesthetics and safety. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure for installing a double-sleeve dustproof cylinder on the ground.

[0016] Figure 2 This is a schematic diagram showing the state of the double-sleeve dustproof sleeve after height adjustment.

[0017] Figure 3 This is a top view of a double-sleeve dustproof casing.

[0018] Figure 4 This is a schematic diagram showing the assembly of a double-sleeve dustproof sleeve and a pin.

[0019] The following is an explanation of the markings in the accompanying drawings:

[0020] 10. Inner cylinder; 11. Positioning pin; 12. Spring base; 13. Compression spring; 14. Top cover; 15. Limiting end cover; 16. Pull ring;

[0021] 20. Outer jacket; 21. Slide groove; 22. Annular guide groove; 23. Positioning groove; 24. Drainage hole. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] In the following embodiments, the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this utility model, it should be understood that the terms such as center, longitudinal, transverse, length, width, thickness, upper, lower, front, back, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, and counterclockwise, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features shown. In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] Reference Figures 1 to 4 A double-sleeve dustproof sleeve includes an outer sleeve 20 buried in the ground and an inner sleeve 10 that can slide up and down inside the outer sleeve 20. The inner sleeve 10 is sequentially equipped with a positioning pin 11, a spring base 12, a compression spring 13, and a top cover 14. The two ends of the positioning pin 11 extend from the outer surface of the dustproof sleeve. The inner wall of the outer sleeve 20 is provided with at least one set of axially distributed annular guide grooves 22 and an axially arranged sliding groove 21, the sliding groove 21 connecting each annular guide groove 22.

[0026] Furthermore, a limiting end cap 15 is provided at the top of the inner cylinder 10, and an insertion hole is provided in the middle of the limiting end cap 15, with the upper cover 14 abutting against the insertion hole. This effectively prevents dust and other impurities from entering the internal space, improving the ease of use and maintenance efficiency of the product. The outer diameter of the limiting end cap 15 is larger than the outer diameter of the top of the outer casing 20. This design can reduce the entry of dust and other impurities into the gap between the outer casing 20 and the inner cylinder 10.

[0027] To facilitate user adjustment of the inner cylinder 10's height, the limiting end cap 15 is equipped with a retractable pull ring 16 for pulling the inner cylinder 10 up and down. The annular guide groove 22 is provided with a positioning groove 23, which is used to fix the position of the positioning pin 11. During adjustment, after the user rotates the inner cylinder 10 by a certain angle (e.g., 90°), the end of the positioning pin 11 slides into the positioning groove 23, preventing the inner cylinder 10 from rotating left or right. This design prevents the inner cylinder 10 from accidentally resetting under external force after adjustment.

[0028] Furthermore, the inner cylinder 10 and the spring base 12 are connected through each other, and the bottom of the outer casing 20 is provided with a drainage hole 24. This design facilitates the drainage of moisture or other liquids that may accumulate inside the dustproof casing, thereby reducing the risk of corrosion and extending service life. The outer casing 20 and the inner cylinder 10 are made of stainless steel, which has good corrosion resistance and wear resistance, and can adapt to various harsh environments.

[0029] The assembly process of the dustproof cylinder described in this application is as follows: The top cover 14, compression spring 13, and spring base 12 are sequentially inserted from the bottom of the inner cylinder 10. Then, the positioning pin 11 is inserted and the nut is tightened. Next, a hole is drilled in the ground, and the outer sleeve 20 is inserted into the hole. Then, the positioning pin 11 of the inner cylinder 10 is aligned with the inlet of the groove 21 of the outer sleeve 20, and the inner cylinder 10 is inserted fully into the outer sleeve 20.

[0030] The working principle of the dustproof cylinder described in this application is as follows: When the height needs to be adjusted, pull out the pull ring 16, pull the inner cylinder 10 to the required position (corresponding to the annular guide groove 22), rotate it at a certain angle so that the end of the positioning pin 11 slides into the annular guide groove 22, thus completing the fixation of the inner cylinder 10. When it needs to be reset, rotate the inner cylinder 10 until the end of the positioning pin 11 slides from the annular guide groove 22 into the slide groove 21, thus resetting the inner cylinder 10. When it is necessary to stop and position the elephant gate, simply insert the pin through the insertion hole of the limiting end cover 15. In addition, when the dustproof cylinder is not needed, the inner cylinder 10 can be retracted into the outer casing 20 to prevent pedestrians from tripping over the inner cylinder 10 protruding from the ground.

[0031] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A double-sleeve dustproof sleeve, characterized in that, It includes an outer casing (20) buried in the ground and an inner cylinder (10) that can slide up and down inside the outer casing (20). The inner cylinder (10) is equipped with a positioning pin (11), a spring base (12), a compression spring (13) and a top cover (14) in sequence. The two ends of the positioning pin (11) extend from the outer surface of the dust cover. The inner wall of the outer casing (20) is provided with at least one set of annular guide grooves (22) distributed along the axial direction and an axially arranged sliding groove (21). The sliding groove (21) connects each annular guide groove (22).

2. The double-sleeve dustproof sleeve according to claim 1, characterized in that, The inner cylinder (10) is provided with a limiting end cap (15) at the top, and the limiting end cap (15) has an insertion hole in the middle, and the upper cover (14) abuts against the insertion hole.

3. A double-sleeve dustproof sleeve according to claim 2, characterized in that, The outer diameter of the limiting end cap (15) is larger than the outer diameter of the top of the outer jacket (20).

4. A double-sleeve dustproof sleeve according to claim 2, characterized in that, The limiting end cap (15) is equipped with a retractable pull ring (16) for pulling the inner cylinder (10) up and down.

5. A double-sleeve dustproof sleeve according to claim 1, characterized in that, The annular guide groove (22) is provided with a positioning groove (23).

6. A double-sleeve dustproof sleeve according to claim 1, characterized in that, The inner cylinder (10) and the spring base (12) are connected, and the bottom of the outer sleeve (20) is provided with a water seepage hole (24).

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