Highly efficient sealed flexible shaft structure

Abstract

This utility model discloses a highly efficient and sealed flexible shaft structure, including a pull rod and a fully threaded connector. The pull rod is located inside the fully threaded connector, and a second sealing cap is threaded to the outer side of the fully threaded connector. A first sealing cap is fastened to the outer side of one end of the second sealing cap. Both the first and second sealing caps are sleeved on the outer side of the pull rod. This highly efficient and sealed flexible shaft structure can effectively improve the sealing performance of the flexible shaft, enhance its environmental adaptability, and extend its service life.

Description

Technical Field

[0001] This utility model relates to the field of flexible shaft technology, specifically to a highly efficient and sealed control flexible shaft structure. Background Technology

[0002] The use of flexible shafts is applicable in various fields. In harsh environments, if the sealing performance of the flexible shaft is poor, mud, sand, and dust can enter the inner cavity of the flexible shaft during use. After a period of use, the flexible shaft will become heavy and jammed, affecting the normal operation of the equipment and shortening the service life of the flexible shaft. Therefore, it is imperative to develop a flexible shaft structure with excellent sealing. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a highly efficient and sealed flexible shaft structure, which can improve the sealing performance of the flexible shaft, enhance its environmental adaptability, and effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a highly efficient and sealed flexible shaft structure, comprising a pull rod and a fully threaded connector, wherein the pull rod is located inside the fully threaded connector, and a second sealing cap is threadedly connected to the outer side of the fully threaded connector, and a first sealing cap is fastened to the outer side of one end of the second sealing cap, and both the first sealing cap and the second sealing cap are sleeved on the outer side of the pull rod.

[0005] In a preferred embodiment of this invention, the first sealing cap is made of rubber or plastic, and the second sealing cap is made of metal.

[0006] As a preferred embodiment of this utility model, the inner side of the first sealing cap is provided with an inner annular protrusion, the inner annular protrusion is in contact with the outer side of the pull rod, and one end of the inner annular protrusion is in contact with the end of the second sealing cap.

[0007] As a preferred embodiment of the present invention, the inner side of the first sealing cap is provided with an internal annular groove, and the outer side of the second sealing cap is provided with an external protrusion that engages with the internal annular groove.

[0008] As a preferred embodiment of this utility model, the second sealing cap is provided with a first stepped hole, a second stepped hole, and a threaded hole inside. The first stepped hole is connected to the second stepped hole. An O-ring is provided in the first stepped hole and fits against the outer side of the pull rod. A support sleeve is provided in the second stepped hole and fits tightly against the O-ring. The inner side of the support sleeve fits against the outer side of the pull rod. The threaded hole is provided at the end of the second sealing cap and is connected to the second stepped hole. The threaded hole is threaded to the outer side of the fully threaded connector.

[0009] Compared with the prior art, the beneficial effects of this utility model are as follows: This highly efficient sealed operating flexible shaft structure first isolates dust, mud, and sand by fastening a first sealing cap at one end of the pull rod, and then connects a second sealing cap to the front end of the fully threaded joint, and places an O-ring seal inside the second sealing cap for secondary isolation. When the operating flexible shaft is pushed and pulled, it can greatly reduce the situation where mud, sand, dust, etc. enter the outer tube of the flexible shaft, causing the flexible shaft to jam and become heavy, thus greatly improving the sealing performance of the flexible shaft and extending its service life. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the first sealing cap; Figure 3 This is a schematic diagram of the second sealing cap.

[0011] In the figure: 1. Pull rod, 2. First sealing cap, 21. Inner annular protrusion, 22. Inner annular groove, 3. Second sealing cap, 31. Outer protrusion, 32. First stepped hole, 33. Second stepped hole, 34. Threaded hole, 4. O-ring, 5. Support sleeve, 6. Fully threaded connector. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0013] Please see Figure 1-3 This utility model provides a technical solution: a highly efficient and sealed control flexible shaft structure, including a pull rod 1, a first sealing cap 2, a second sealing cap 3, an O-ring 4, a support sleeve 5, and a fully threaded connector 6; The pull rod 1 is inserted into the inner hole of the first sealing cap 2, the second sealing cap 3 and the full thread connector 6 in sequence, so that it can reciprocate within the inner hole; To ensure the sealing performance of the first sealing cap 2, an inner annular protrusion 21 is provided on the inner side of the first sealing cap 2. The inner annular protrusion 21 fits against the outer side of the pull rod 1, and one end of the inner annular protrusion 21 fits against the end of the second sealing cap 3. The initial sealing of the flexible shaft is achieved through the inner annular protrusion 21. In order to securely fasten the first sealing cap 2 onto the second sealing cap 3, an inner annular groove 22 is provided around the inner side of the first sealing cap 2, and an outer protrusion 31 is provided on the outer side of the second sealing cap 3 to engage with the inner annular groove 22. To further enhance the sealing performance of the flexible shaft, the interior of the second sealing cap 3 is provided with a first stepped hole 32, a second stepped hole 33 and a threaded hole 34. The first stepped hole 32 and the second stepped hole 33 are connected. An O-ring seal 4 is provided in the first stepped hole 32. The O-ring seal 4 fits against the outer side of the pull rod 1 and performs secondary sealing through the O-ring seal 4. The O-ring seal 4 is installed in the first stepped hole 33 for limiting the position. A support sleeve 5 is provided inside the second step hole 33. The support sleeve 5 is made of PTFE. It is installed inside the second sealing cap 3 and is tightly attached to the O-ring 4. It supports the movement of the tie rod 1 and has a certain lubrication effect. The threaded hole 34 is located at the end of the second sealing cap 3 and communicates with the second stepped hole 33. The threaded hole 34 is threadedly connected to the outer side of the full-threaded connector 6, thereby achieving a firm connection between the second sealing cap 3 and the full-threaded connector 6. The other end of the full-threaded connector 6 is connected to the threaded sleeve of the outer tube by a thread.

[0014] This invention achieves initial sealing of the flexible shaft through the cooperation of the first sealing cap 2 and the second sealing cap 3, and achieves secondary sealing by setting an O-ring 4 inside the second sealing cap 3. When the flexible shaft is operated to push or pull, it effectively prevents mud, dust and other debris from entering the interior of the flexible shaft, ensuring the performance of the flexible shaft and extending its service life.

[0015] The parts of the utility model not described in detail are prior art. Although embodiments of the utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model. The scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A highly efficient sealed flexible shaft structure, comprising a pull rod (1) and a fully threaded connector (6), wherein the pull rod (1) is located within the fully threaded connector (6), characterized in that: The outer side of the threaded connector (6) is connected to a second sealing cap (3), and a first sealing cap (2) is fastened to one end of the outer side of the second sealing cap (3). Both the first sealing cap (2) and the second sealing cap (3) are sleeved on the outer side of the pull rod (1).

2. The highly efficient sealed flexible shaft structure according to claim 1, characterized in that: The first sealing cap (2) is a rubber and plastic part, and the second sealing cap (3) is a metal part.

3. The highly efficient sealed flexible shaft structure according to claim 1 or 2, characterized in that: The inner side of the first sealing cap (2) is provided with an inner annular protrusion (21), which is in contact with the outer side of the pull rod (1), and one end of the inner annular protrusion (21) is in contact with the end of the second sealing cap (3).

4. The highly efficient sealed flexible shaft structure according to claim 1 or 2, characterized in that: The inner side of the first sealing cap (2) is provided with an inner annular groove (22), and the outer side of the second sealing cap (3) is provided with an outer protrusion (31) that engages with the inner annular groove (22).

5. The highly efficient sealed flexible shaft structure according to claim 1, characterized in that: The second sealing cap (3) is provided with a first stepped hole (32), a second stepped hole (33) and a threaded hole (34). The first stepped hole (32) is connected to the second stepped hole (33). An O-ring (4) is provided in the first stepped hole (32). The O-ring (4) is in contact with the outer side of the pull rod (1). A support sleeve (5) is provided in the second stepped hole (33). The O-ring (4) is in close contact with the support sleeve (5). The inner side of the support sleeve (5) is in contact with the outer side of the pull rod (1). The threaded hole (34) is provided at the end of the second sealing cap (3) and is connected to the second stepped hole (33). The threaded hole (34) is threaded to the outer side of the full-thread connector (6).

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