Extension and retraction holster with interchangeable shaft

Abstract

The utility model discloses a kind of connecting rod conversion telescopic elastic sleeve, including inner connector, inner connector is connected connecting rod by limiting pipe, and the top of inner connector has triangular inner connector hole, limiting hole and inner concave ring groove are equipped in side wall, inner concave ring groove is limited to limit pressure ring, inner connector inserts outer sleeve, connecting rod passes through outer sleeve, limit pressure ring is connected outer sleeve inner wall by spring, and outer sleeve inner wall has the compression type pin that cooperates with limiting hole.It can be quickly connected without additional tools, the connection is stable, ensures the accuracy and safety of opening, has good versatility, can reduce cost, and is resistant to corrosion and wear, prolongs service life.

Description

Technical Field

[0001] This utility model relates to the technical field of hole opener connecting components, specifically to a connecting rod conversion telescopic sleeve. Background Technology

[0002] Hole saws are indispensable tools in many fields such as machining, building decoration, and pipe installation, used to create holes of different sizes in various materials including metal, wood, plastic, and stone. Among them, hole saws with triangular connectors occupy an important position in various hole-making operations due to their stable connection and efficient power transmission. However, in actual use, triangular connector hole saws must be effectively connected to the corresponding connecting rod to achieve power transmission and precise operation.

[0003] Currently, the connection methods of existing extension rods and triangular connector hole saws on the market have many obvious defects. Traditional connection methods mostly use bolt fastening, snap-fit ​​joints, and other structures. Not only is the connection process cumbersome, requiring additional tools and consuming a lot of time, reducing work efficiency, but the connecting parts are also prone to wear during frequent disassembly and assembly, leading to loosening of the connection. In high-speed rotating hole-drilling operations, a loose connection can cause severe vibration, affecting the accuracy of the hole, resulting in problems such as hole size deviation and uneven edges, and may also create safety hazards, threatening the personal safety of operators.

[0004] Furthermore, existing extension rods have extremely poor compatibility with triangular connector hole saws; a single extension rod often only matches a specific model and specification of triangular connector hole saw. This forces construction workers to carry multiple extension rods of different specifications when facing different drilling needs, increasing the burden of equipment carrying and the complexity of management. At the same time, when an extension rod or hole saw is damaged, due to its poor versatility, the entire component often needs to be replaced, increasing operating costs. Moreover, after long-term use, some connection structures may become stuck due to rust and dust accumulation, further complicating disassembly and severely affecting the continuity and convenience of operations.

[0005] To address the aforementioned issues, this invention proposes a telescopic sleeve for connecting rods, which enables quick connection and disassembly with a triangular connector hole opener, providing a stable connection and good versatility. Utility Model Content

[0006] The purpose of this utility model is to provide a telescopic sleeve for connecting rods to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention employs the following technical means:

[0008] A telescopic sleeve for connecting rod conversion includes an inner tube, which is connected to a connecting rod via a limiting tube. The top of the inner tube has a triangular inner connection hole, and the side wall of the inner tube has a limiting hole communicating with the triangular inner connection hole and an inner concave annular groove distributed at the top of the limiting hole. A limiting pressure ring is sleeved on the inner concave annular groove. An outer tube is movably inserted into the inner tube, and the connecting rod passes through the outer tube. The limiting pressure ring is connected to the inner wall of the outer tube via a spring sleeved on the outside of the inner tube. A compression pin is connected to the inner wall of the outer tube and movably inserted into the limiting hole.

[0009] Preferably, the connecting rod has two sets of first mounting slots and two sets of second mounting slots that are symmetrically distributed in a cross shape.

[0010] Preferably, the connecting rod, limiting tube, inner tube, limiting pressure ring, and outer tube are all made of stainless steel.

[0011] Preferably, the connecting rod, the limiting tube, and the inner tube are integrally forged.

[0012] Preferably, the depth of the triangular inner hole is 1 / 3 to 1 / 2 of the length of the inner pipe.

[0013] Preferably, the spring is made of elastic steel.

[0014] Preferably, the compression pin is fixedly connected to the inner wall of the outer sleeve by welding.

[0015] Preferably, the length of the outer tube is greater than the sum of the lengths of the inner tube and the limiting tube.

[0016] This utility model has the following beneficial effects:

[0017] 1. In view of the problems of traditional connection methods that require additional tools and have a cumbersome connection process, this utility model achieves fixation by quickly connecting the triangular inner hole and the triangular connector, and by cooperating the compression pin and the limiting hole. The connection can be completed without additional tools, which greatly simplifies the operation process, saves connection time, and improves work efficiency.

[0018] 2. In the event of wear and loosening of connecting parts due to frequent disassembly and assembly, the connecting rod, limiting tube, and inner tube of this telescopic sleeve are integrally forged, ensuring the strength and stability of the overall structure and reducing the risk of loosening of the connecting parts. At the same time, the reliable cooperation between the compression pin and the limiting hole can effectively prevent the triangular joint from falling off during use, avoid severe vibration caused by loose connection, ensure the accuracy of hole opening, and reduce the occurrence of problems such as hole size deviation and uneven edges.

[0019] 3. In terms of safety, the secure connection avoids potential safety hazards caused by loose connections during high-speed rotation operations, providing a more reliable guarantee for the personal safety of operators.

[0020] 4. To address the issue of poor compatibility between existing extension rods and triangular connector hole openers, the two sets of first mounting slots and two sets of second mounting slots, which are symmetrically distributed in a cross shape on the extension rod, can be easily connected with different types of extension rods, improving the versatility of the telescopic sleeve. This eliminates the need for construction personnel to carry multiple extension rods of different specifications, reducing the burden of equipment carrying and the complexity of management.

[0021] 5. In terms of usage cost, because this utility model has good versatility, when the connecting rod or hole opener is damaged, there is no need to replace the relevant parts as a whole, which reduces the usage cost.

[0022] 6. In addition, the connecting rod, limiting tube, inner tube, limiting pressure ring, and outer tube are all made of stainless steel, which has good corrosion resistance and wear resistance, reduces jamming caused by rust, dust accumulation, etc., reduces disassembly difficulty, ensures the continuity and convenience of operation, and extends the service life of the equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is a top view of the present invention;

[0025] Figure 3 This is an exploded view of the structure of this utility model;

[0026] In the attached figures, the following labels are used:

[0027] First mounting slot 1, second mounting slot 2, connecting rod 3, limiting tube 4, inner tube 5, limiting hole 6, inner concave ring groove 7, triangular inner connecting hole 8, limiting pressure ring 9, spring 10, compression pin 11, outer sleeve 12. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] like Figure 1-3As shown, a telescopic sleeve for connecting rod conversion includes an inner tube 5. The inner tube 5 is connected to a connecting rod 3 via a limiting tube 4. A triangular inner connection hole 8 is provided at the top of the inner tube 5. A limiting hole 6 communicating with the triangular inner connection hole 8 and an inner concave annular groove 7 distributed at the top of the limiting hole 6 are provided on the side wall of the inner tube 5. A limiting pressure ring 9 is sleeved on the inner concave annular groove 7. An outer tube 12 is movably inserted into the inner tube 5. The connecting rod 3 passes through the outer tube 12. The limiting pressure ring 9 is connected to the inner wall of the outer tube 12 via a spring 10 sleeved on the outside of the inner tube 5. A compression pin 11 is connected to the inner wall of the outer tube 12 and movably inserted into the limiting hole 6.

[0030] The connecting rod 3 has two sets of first mounting slots 1 and two sets of second mounting slots 2 arranged in a cross shape and symmetrically distributed. The advantages of the above configuration are: it can adapt to a variety of different types and specifications of connecting rods; by installing corresponding connectors in different mounting slots, it can achieve quick connection with various connecting rods, greatly improving the versatility and applicability of the telescopic sleeve and reducing the number of tools to carry.

[0031] Connecting rod 3, limiting tube 4, inner tube 5, limiting pressure ring 9, and outer tube 12 are all made of stainless steel. The advantages of the above configuration are: stainless steel has excellent corrosion resistance and wear resistance, which can effectively resist the corrosion of water vapor, dust and chemicals in the working environment, reduce the failure of parts due to rust or wear, significantly extend the service life of the telescopic sleeve, and ensure its stable operation in harsh environments.

[0032] The connecting rod 3, the limiting tube 4, and the inner tube 5 are forged as a single piece. The advantages of this design are: the single-piece forging makes the three parts form a whole structure, eliminating gaps and weak points at the connection points, greatly improving the overall structural strength and stability, and avoiding problems such as loosening or breakage of the connection when rotating at high speed or under great force, thus ensuring efficient and reliable power transmission.

[0033] The depth of the triangular inner connection hole 8 is 1 / 3 to 1 / 2 of the length of the inner tube 5. The advantages of the above setting are: this depth can ensure the effective insertion of the triangular connector and the inner tube 5, ensuring the stability of the connection and the reliability of power transmission, while not excessively weakening the structural strength of the inner tube 5 due to excessive hole depth, thus balancing the connection effect and the strength of the component itself.

[0034] Spring 10 is made of elastic steel. The advantages of the above configuration are: elastic steel has a high elastic limit and toughness, and can maintain stable elastic performance during repeated compression and reset, ensuring that the outer tube 12 can be accurately and quickly reset after operation, ensuring reliable cooperation between the compression pin 11 and the limiting hole 6, extending the service life of spring 10, and reducing failures caused by spring failure.

[0035] The compression pin 11 is fixedly connected to the inner wall of the outer sleeve 12 by welding. The advantages of the above configuration are: the welding connection can make the compression pin 11 and the outer sleeve 12 form a solid whole, avoiding loosening or falling off during long-term use or frequent operation, ensuring that the compression pin 11 can accurately fit with the limiting hole 6, and ensuring effective limiting of the triangular joint.

[0036] The length of the outer sleeve 12 is greater than the sum of the lengths of the inner sleeve 5 and the limiting sleeve 4. The advantages of the above arrangement are: it can ensure that the outer sleeve 12 completely covers the inner sleeve 5 and the limiting sleeve 4 and their connecting structures, such as the spring 10 and the limiting pressure ring 9, during the sliding process, effectively preventing dust and impurities from entering the interior, playing a good protective role, and reducing component wear and the risk of failure.

[0037] Working principle

[0038] When in use, first, according to the type of connecting rod to be connected, the telescopic sleeve is connected and fixed to the connecting rod through the first mounting groove 1 and the second mounting groove 2 on the connecting rod 3.

[0039] Then, pull the outer sleeve 12. The outer sleeve 12 will move the compression pin 11 connected to its inner wall together, so that the compression pin 11 disengages from the limiting hole 6 on the side wall of the inner tube 5. During this process, the spring 10 sleeved on the outside of the inner tube 5 will be compressed because one end of the spring 10 is connected to the limiting pressure ring 9 and the other end is connected to the inner wall of the outer sleeve 12. The limiting pressure ring 9 is sleeved in the concave annular groove 7 and its position is relatively fixed.

[0040] Next, insert the triangular connector of the triangular connector hole opener into the triangular inner hole 8 at the top of the inner tube 5.

[0041] Subsequently, the outer sleeve 12 is released, and under the elastic force of the spring 10, the outer sleeve 12 will return to its original position. At the same time, the compression pin 11 will be re-inserted into the limiting hole 6 to limit and fix the triangular connector inserted into the triangular inner connection hole 8, thereby completing the connection with the triangular connector hole opener.

[0042] When disassembly is required, pull the outer sleeve 12 again to disengage the compression pin 11 from the limiting hole 6. At this time, the triangular connector can be removed from the triangular inner connection hole 8 to complete the disassembly operation.

[0043] Among them, the limiting tube 4 serves to connect and limit the connecting rod 3 and the inner tube 5, ensuring the stability of the overall structure. Example 1

[0044] Machining scenarios

[0045] In a mechanical parts processing plant, workers need to drill holes of different specifications in various metal materials. Existing equipment, particularly drilling equipment, often features single-type connecting rod interfaces, making it difficult to adapt to various triangular connector hole openers. By introducing the connecting rod conversion telescopic sleeve of this invention, a commonly used connecting rod can be quickly connected via the first mounting groove 1 and the second mounting groove 2 on the connecting rod 3. When different sized triangular connector hole openers are needed, simply pull the outer sleeve 12 to disengage the compression pin 11 from the limiting hole 6, insert the corresponding triangular connector into the triangular inner hole 8 of the inner tube 5, and then release the outer sleeve 12 to complete the fixation. During continuous high-intensity machining, the stainless steel connecting rod 3, limiting tube 4, inner tube 5, limiting pressure ring 9, and outer sleeve 12 withstood the corrosion of metal shavings and coolant without rust or wear. The integrally forged connecting rod 3, limiting tube 4, and inner tube 5 ensured stable power transmission without loosening, effectively improving processing efficiency and hole quality. Example 2

[0046] Architectural decoration scene

[0047] A construction and renovation team needs to drill holes in various materials, including wood and stone, to install hardware and pipes during interior decoration work. Previously, carrying multiple extension poles of different specifications not only increased the burden of tool transportation but also easily led to confusion on the construction site. After adopting this extension pole conversion telescopic sleeve, its versatility becomes apparent. When drilling holes in wood, the telescopic sleeve is connected to the extension pole of the woodworking drill, and different sizes of triangular connector hole saws can be quickly changed through the triangular inner connector hole 8 to complete the drilling of wood with different diameters. The same operation is performed when drilling holes in stone. Because the spring 10 is made of elastic steel, its elasticity is long-lasting and stable. Even during frequent pulling of the outer sleeve 12 to change hole saws, the outer sleeve 12 can always be accurately reset, ensuring a reliable engagement between the compression pin 11 and the limiting hole 6. Furthermore, the longer outer sleeve 12 effectively prevents dust from the construction site from entering the internal structure, reducing component wear and ensuring the smooth progress of the decoration work. Example 3

[0048] Pipeline installation scenarios

[0049] In urban water supply pipeline installation projects, construction workers need to drill holes in pipes of different diameters to connect branch pipes or install valves and other components. Due to the complex environment at construction sites, with high levels of moisture and corrosive substances, the stainless steel properties of this telescopic sleeve adapter play a crucial role. Construction workers connect the telescopic sleeve to the adapter of the pipe drilling equipment and use the triangular inner connection hole 8 to connect a triangular connector suitable for the pipe material. During the drilling process, the tight fit between the compression pin 11 and the limiting hole 6 ensures that the hole cutter will not loosen during high-speed rotation, guaranteeing drilling accuracy. Furthermore, because the compression pin 11 is fixedly connected to the inner wall of the outer sleeve 12 by welding, it has not loosened or fallen off even in the long-term humid construction environment, making the entire pipeline installation process more efficient and safer, and reducing project delays caused by tool malfunctions.

[0050] The examples provided in this utility model are not intended to limit the implementation methods. Those skilled in the art will recognize that various variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementation methods, but any obvious variations or modifications derived therefrom are still within the protection scope of this utility model.

Claims

1. A telescopic sleeve for converting a connecting rod, characterized in that, The device includes an inner tube (5), which is connected to a connecting rod (3) via a limiting tube (4). The top of the inner tube (5) has a triangular inner connection hole (8). The side wall of the inner tube (5) has a limiting hole (6) communicating with the triangular inner connection hole (8) and an inner concave annular groove (7) distributed on the top of the limiting hole (6). The inner concave annular groove (7) is fitted with a limiting pressure ring (9). The inner tube (5) is movably inserted with an outer tube (12). The connecting rod (3) passes through the outer tube (12). The limiting pressure ring (9) is connected to the inner wall of the outer tube (12) via a spring (10) fitted on the outside of the inner tube (5). The inner wall of the outer tube (12) is connected with a compression pin (11) that is movably inserted with the limiting hole (6).

2. The telescopic sleeve for connecting rods according to claim 1, characterized in that, The connecting rod (3) has two sets of first mounting slots (1) and two sets of second mounting slots (2) that are cross-shaped and symmetrically distributed.

3. The telescopic sleeve for connecting rods according to claim 1, characterized in that, The connecting rod (3), limiting tube (4), inner tube (5), limiting pressure ring (9), and outer tube (12) are all made of stainless steel.

4. The telescopic sleeve for connecting rods according to claim 3, characterized in that, The connecting rod (3), the limiting tube (4), and the inner tube (5) are integrally forged.

5. The telescopic sleeve for connecting rods according to claim 1, characterized in that, The depth of the triangular inner hole (8) is 1 / 3 to 1 / 2 of the length of the inner pipe (5).

6. The telescopic sleeve for connecting rods according to claim 1, characterized in that, The spring (10) is made of elastic steel.

7. The telescopic sleeve for connecting rods according to claim 1, characterized in that, The compression pin (11) is fixedly connected to the inner wall of the outer sleeve (12) by welding.

8. The telescopic sleeve for connecting rods according to claim 1, characterized in that, The length of the outer tube (12) is greater than the sum of the lengths of the inner tube (5) and the limiting tube (4).

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