Multifunctional quick-change head tool for cigarette production

Abstract

The utility model relates to the technical field of auxiliary tools for cigarette production, in particular to a multifunctional quick-change head tool for cigarette production. The utility model aims to solve the problems that a plurality of working procedures have problems in the cigarette production process, special tools for solving the problems are lacked, the tools are frequently replaced, the operation is complicated, the efficiency is low and the like. By designing various quick-change heads such as the loosening head, the vertical rake head, the flat rake head, the cleaning shovel head and the valve switch sleeve head, quick response to problems occurring in different process links is achieved, quick connection and replacement are achieved through the quick-change male head assembly and the quick-change female head assembly, operation is easy and convenient, and working efficiency is improved. The quick-change head tool is compact in structure and easy to maintain, the types of the quick-change heads can be increased according to production requirements, and the quick-change head tool has high compatibility and expandability.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary tools for cigarette production, specifically to a multifunctional quick-change head tool for cigarette production. Background Technology

[0002] In cigarette production, various processes demand versatility and flexibility from auxiliary tools. Especially in handling tobacco leaves and waste tobacco, traditional tools often struggle to meet the needs of rapid changeover, efficient cleaning, and prevention of material breakage. Production personnel primarily face the following challenges:

[0003] The problem of blockage at the discharge port of the upstream drum feeder conveyor: Drum machine is used for processes such as loosening tobacco leaves, feeding, and flavoring tobacco shreds. Upstream of the drum machine, the feeder conveyor is responsible for transporting the tobacco leaves to the next process step, until they are fed into the drum. However, due to the irregular shape and moisture content of the tobacco leaves, they easily stick together and accumulate at the discharge port of the conveyor, causing blockages. This not only affects production efficiency but may also damage the equipment. Manual cleaning is inefficient and poses safety hazards; non-specialized tools can easily damage and break the tobacco leaves during cleaning, affecting the quality of subsequent tobacco shred processing products.

[0004] The issue of cleaning wet waste smoke from the discharge trough of the downstream drum conveyor: After processes such as loosening, feeding, and flavoring tobacco leaves, a lot of tobacco leaves and shreds adhere to the inner wall of the drum conveyor, which should be cleaned and disposed of according to regulations. After cleaning, the wet waste smoke accumulates in the discharge trough of the downstream drum conveyor. This trough is also used to transport normal tobacco leaves and shreds. If this wet waste smoke is not cleaned in time, it will not only affect the normal operation of subsequent processes but may also corrode the equipment. There are many electrical equipment and power pipelines around the discharge trough of the drum conveyor. High-powered high-pressure water guns cannot be used for direct washing to avoid water splashing onto the electrical equipment and power pipelines, causing short circuits and damage. Traditional cleaning tools are difficult to adapt to the shape of the trough and the accumulation of wet waste smoke in different locations, resulting in low cleaning efficiency.

[0005] Issues with transporting wet waste fumes from the cleaning tank: During the cleaning process, the wet waste fumes need to be transported from the cleaning tank to a special waste bin. The internal space of the cleaning tank is relatively narrow, so appropriate cleaning tools are required.

[0006] Issues with compressed air valves near high-temperature steam pipes: In cigarette production, some processes require the use of high-temperature steam and compressed air. The compressed air valves are not only located near the high-temperature steam pipes, but are also typically positioned high up (e.g.,...). Figure 5 As shown in the figure, operating the compressed air valve not only poses a risk of burns, but also requires climbing ladders to work at heights, which carries the risk of falls and presents a safety hazard. Utility Model Content

[0007] In response to the work requirements and existing problems in the aforementioned background technology, the inventors have considered and innovated, and designed a multi-functional quick-change head tool for cigarette production. Through quick-change heads with various functions, the tool can efficiently and flexibly handle problems in different process links during cigarette production.

[0008] To solve the above problems and achieve the above objectives, the present invention adopts the following technical solution:

[0009] A multi-functional quick-change head tool for cigarette production, comprising:

[0010] Loose head (1), the loose head (1) is composed of a triangular plate and a quick-change male head (6) connected together, and two cylindrical teeth are connected below the triangular plate;

[0011] Vertical rake head (2), the vertical rake head (2) is composed of a triangular plate and a quick-change male head (6) connected together, and several teeth are connected below the triangular plate, and the direction of the teeth is parallel to the triangular plate;

[0012] The flat rake head (3) is composed of a triangular plate and a quick-change male head (6). Several teeth are connected to the triangular plate, and the direction of the teeth is perpendicular to the triangular plate.

[0013] The cleaning shovel head (4) is composed of a shovel blade and a quick-change male head (6). The shovel blade is composed of an irregularly shaped connecting plate, a rectangular bottom plate, and two rectangular side plates.

[0014] Valve switch sleeve head (5), the valve switch sleeve head (5) is composed of a sleeve (51), a rotating shaft (52), a first connecting rod (53) and a quick-change male head (6). The sleeve (51) is a hollow cylindrical structure connected to a flared mouth. The sleeve (51) is fixedly connected to one end of the rotating shaft (52) and can rotate through the rotating shaft (52) on the opening of the first connecting rod (53).

[0015] Quick-change male head (6), the quick-change male head (6) is connected to the loosening head (1), the vertical rake head (2), the flat rake head (3), the cleaning shovel head (4), and the valve switch sleeve head (5) respectively;

[0016] Quick-change female connector assembly (7), one end of which is connected to quick-change male connector (6), and the other end is connected to extension handle (8);

[0017] The extended handle (8) is a cylindrical rod with a threaded post at one end and anti-slip texture at the other end. The length of the extended handle (8) can be customized according to requirements.

[0018] As a preferred embodiment of the present invention, the quick-change male connector (6) is composed of a cylindrical connecting post and a hollow octagonal prism-shaped first connecting prism (61). At least four sets of eight first limiting grooves (611) are evenly distributed on the first connecting prism (61). The quick-change male connector (6) and the quick-change female connector assembly (7) are matched in shape and structure.

[0019] As a preferred embodiment of this utility model, the quick-change female connector assembly (7) includes:

[0020] The second connecting rod (71) is connected to the extended handle (8). The second connecting rod (71) is a hollow cylindrical rod with a thread inside one end.

[0021] The second connecting prism (72) is connected to one end of the second connecting rod (71). The second connecting prism (72) is a hollow octagonal prism structure with at least four sets of eight limiting locking ball grooves (721) evenly distributed on it. At least four sets of eight limiting locking balls (722) are nested inside the limiting locking ball grooves (721).

[0022] A return spring (73) is nested between the second connecting prism (72) and the sliding sleeve (74);

[0023] The sliding sleeve (74) is connected to the second connecting prism (72) via a limiting locking ball (722) and a return spring (73). The sliding sleeve (74) is a hollow cylindrical structure with an inner ring that is an octagonal prism shape that matches the second connecting prism (72). At least four sets of eight second limiting grooves (741) are evenly distributed on the upper part. When the return spring (73) is not compressed, the limiting locking ball (722) is nested between the limiting locking ball groove (721) and the second limiting groove (741).

[0024] This utility model designs a multifunctional quick-change head tool for cigarette production. Its working principle is based on multiple quick-change heads with different functions. The various operating tools assembled using these quick-change heads can flexibly and efficiently handle various problems encountered in the cigarette production process. The working principle of this utility model is as follows:

[0025] Working principle of loosening head (1):

[0026] The loose head (1) adopts a cylindrical tooth design and only has two teeth. Compared with the common rake head and rake teeth, it can reduce the friction on the tobacco leaves (A2) and effectively reduce the breakage of tobacco leaves (A2).

[0027] In use, the loosening head (1) is connected to the extension handle (8) via the quick-change female head assembly (7) to complete the assembly of the loosening rake. When the feed conveyor (A1) of the roller equipment upstream of the roller equipment becomes blocked, the operator can use the loosening rake to loosen and clear the blocked tobacco leaves (A2) to solve the blockage problem. Similarly, it can be applied to workstations in cigarette production where similar blockage problems occur.

[0028] Working principles of vertical rake head (2) and flat rake head (3):

[0029] The vertical rake head (2) and the flat rake head (3) are also composed of a triangular plate and a quick-change male head (6), but the direction of the teeth is different.

[0030] In use, the vertical rake head (2) or the flat rake head (3) is connected to the extended handle (8) via the quick-change female head assembly (7) to complete the assembly of the cleaning rake. When cleaning the wet waste smoke (B2) in the discharge trough (B) of the drum, the two types of rake heads can be quickly replaced through the quick-change mechanism. The teeth in different directions can clean the wet waste smoke (B2) in the gaps of the trough from different angles, making the cleaning more thorough. Similarly, it can be applied to similar cleaning stations in cigarette production.

[0031] Working principle of cleaning shovel head (4):

[0032] The blade design of the cleaning shovel (4) allows it to fit into the narrow interior space of the cleaning tank (B1) and effectively scoop up the wet waste smoke (B2) in the cleaning tank (B1).

[0033] When in use, the short-handled cleaning shovel is assembled by connecting the cleaning shovel head (4) and the quick-change female head assembly (7), and the operator can easily shovel wet waste smoke (B2) from the cleaning tank (B1) into the waste bin.

[0034] Working principle of valve switch sleeve head (5):

[0035] The valve switch sleeve head (5) is composed of a sleeve (51), a rotating shaft (52), a first connecting rod (53), and a quick-change male head (6). The hollow cylindrical structure of the sleeve (51) connected to the flared mouth can lock the compressed air valve (C), and the rotating shaft (52) can rotate on the first connecting rod (53) to adapt to the rotation of the compressed air valve (C), so that the valve switch sleeve head (5) can complete the opening and closing of the compressed air valve (C).

[0036] In use, the valve switch sleeve head (5) is connected to the extension handle (8) via the quick-change female head assembly (7) to complete the assembly of the valve switch operating rod. The operator can use the valve switch operating rod to safely and conveniently switch the compressed air valve (C) without directly contacting the high-temperature steam pipe (C1). Similarly, it can be applied to similar valves that need to be switched in cigarette production.

[0037] Working principle of quick-change male connector (6) and quick-change female connector assembly (7):

[0038] like Figure 10 , Figure 11 , Figure 12 As shown, when the quick-change male connector (6) is connected to the quick-change female connector assembly (7), while pulling the sliding sleeve (74) down, the quick-change male connector (6) is placed into the quick-change female connector assembly (7). At this time, the return spring (73) is compressed, the limit locking ball (722) is disengaged from the second limit groove (741), the sliding sleeve (74) is released, and under the action of the return spring (73), the sliding sleeve (74) is reset, and the limit locking ball (722) is inserted into the first limit groove (611), thereby realizing the connection and fixation of the quick-change male connector (6) and the quick-change female connector assembly (7).

[0039] The function of the extended handle (8):

[0040] The extended handle (8) is a cylindrical rod with anti-slip texture at one end for easy handling by the operator. By connecting with the quick-change female head assembly (7), the extended handle (8) can extend the operating distance and improve operating efficiency.

[0041] The beneficial effects of this utility model are:

[0042] 1. This utility model reduces tobacco leaf breakage: The loosening rake composed of the loosening head of this utility model has cylindrical teeth that can flexibly clear blocked tobacco leaves without easily causing damage, thereby reducing tobacco leaf breakage and waste, and improving the product quality of subsequent tobacco processing.

[0043] 2. This utility model improves production efficiency: By integrating multiple functions into the quick-change head, this utility model can quickly deal with various problems encountered in the cigarette production process, such as blockage, cleaning, and valve operation, reducing operation time and downtime, thereby significantly improving production efficiency.

[0044] 3. This invention reduces safety risks: Cigarette production lines involve numerous pieces of equipment and complex operating conditions. Many devices pose a threat to the personal safety of operators, especially when operating compressed air valves near high-temperature steam pipes, where working at heights carries the risk of burns and falls. This invention allows operators to work remotely, significantly reducing safety risks and ensuring operator safety.

[0045] 4. This utility model enhances operational flexibility and improves tool compatibility: The quick-change male and female connector assembly of this utility model is universally compatible and can be adapted to various tool heads of different shapes and sizes. Furthermore, as production needs change, the tool's functionality can be easily expanded and upgraded, improving its compatibility and scalability. Attached Figure Description

[0046] Figure 1 This is a schematic diagram of the working state of the present invention at the feeding belt conveyor of the roller equipment, which is Example 1;

[0047] Figure 2 This is one of the schematic diagrams of the working state of the present invention at the discharge vibrating trough of the roller equipment in Embodiment 2;

[0048] Figure 3 This is the second schematic diagram of the working state of the present invention at the discharge vibrating trough of the roller equipment, which is Example 2.

[0049] Figure 4 This is a schematic diagram of the working state of the present invention at the cleaning tank in Embodiment 3;

[0050] Figure 5 This is a schematic diagram showing the location and structure of the compressed air valve;

[0051] Figure 6 This is a schematic diagram of the working state of the present invention with the valve open at the compressed air valve in Embodiment 4.

[0052] Figure 7 This is a schematic diagram of the working state of the present invention with the valve closed at the compressed air valve in Embodiment 4;

[0053] Figure 8 This is a schematic diagram of the working principle of the valve switch sleeve head and a structural schematic diagram of the quick-change male head;

[0054] Figure 9 This is a structural schematic diagram and a three-dimensional assembly drawing of the quick-change female connector assembly;

[0055] Figure 10 This is one of the structural schematic diagrams of the assembly of the vertical rake head in this utility model;

[0056] Figure 11 This is the second structural schematic diagram of the assembly of the vertical rake head in this utility model;

[0057] Figure 12 yes Figure 11 The diagram shows a cross-sectional view at point AA and a schematic diagram illustrating the connection and separation principle of the quick-change male and quick-change female connectors.

[0058] Figure 13This is a schematic diagram of the overall three-dimensional structure of the multifunctional quick-change head tool of this utility model;

[0059] The following labels are used in the diagram: 1—Loosening head; 2—Vertical rake head; 3—Flat rake head; 4—Cleaning shovel head; 5—Valve switch sleeve head; 51—Sleeve; 52—Rotating shaft; 53—First connecting rod; 6—Quick-change male head; 61—First connecting prism; 611—First limiting groove; 7—Quick-change female head assembly; 71—Second connecting rod; 72—Second connecting prism; 721—Limit locking ball groove; 722—Limit locking ball; 73—Reset spring; 74—Sliding sleeve; 741—Second limiting groove; 8—Extended handle; A—Roller feeding belt conveyor; A1—Discharge port; A2—Tobacco leaf; B—Roller discharge vibrating trough; B1—Cleaning trough; B2—Wet waste smoke; C—Compressed air valve; C1—High-temperature steam pipe. Detailed Implementation

[0060] To make the purpose, technical solution and advantages of this utility model patent clearer, the present utility model patent will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that these descriptions are exemplary only and are not intended to limit the scope of this utility model patent. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concept of this utility model patent.

[0061] In this specific embodiment, extended handles 8 with lengths of 0.8 meters, 1.2 meters, and 2 meters are processed respectively, and all other components are prefabricated in the factory.

[0062] like Figure 1 — Figure 13 The illustrated multi-functional quick-change head tool for cigarette production includes:

[0063] Loose head 1, which is composed of a triangular plate and a quick-change male head 6 connected together, and two cylindrical teeth are connected below the triangular plate;

[0064] The vertical rake head 2 is composed of a triangular plate and a quick-change male head 6. Several teeth are connected below the triangular plate, and the direction of the teeth is parallel to the triangular plate.

[0065] The flat rake head 3 is composed of a triangular plate and a quick-change male head 6. Several teeth are connected to the triangular plate, and the direction of the teeth is perpendicular to the triangular plate.

[0066] The cleaning shovel head 4 is composed of a shovel blade and a quick-change male head 6. The shovel blade is composed of an irregularly shaped connecting plate, a rectangular base plate, and two rectangular side plates.

[0067] The valve switch sleeve head 5 is composed of a sleeve 51, a rotating shaft 52, a first connecting rod 53 and a quick-change male head 6. The sleeve 51 is a hollow cylindrical structure with a flared mouth. The sleeve 51 is fixedly connected to one end of the rotating shaft 52 and can rotate through the opening of the first connecting rod 53 via the rotating shaft 52.

[0068] Quick-change male head 6, which is connected to loosening head 1, vertical rake head 2, flat rake head 3, cleaning shovel head 4, and valve switch sleeve head 5 respectively;

[0069] Quick-change female connector assembly 7, one end of which is connected to quick-change male connector 6, and the other end of which is connected to extension handle 8;

[0070] The extended handle 8 is a cylindrical rod with a threaded post at one end and an anti-slip texture at the other end. The length of the extended handle 8 can be customized according to requirements.

[0071] Furthermore, such as Figure 8 As shown, the quick-change male connector 6 is composed of a cylindrical connecting post and a hollow octagonal prism-shaped first connecting prism 61. At least four sets of eight first limiting grooves 611 are evenly distributed on the first connecting prism 61. The quick-change male connector 6 and the quick-change female connector assembly 7 are matched in shape and structure.

[0072] Furthermore, such as Figure 9 — Figure 12 As shown, the quick-change female connector assembly 7 includes:

[0073] The second connecting rod 71 is connected to the extended handle 8. The second connecting rod 71 is a hollow cylindrical rod with a thread inside one end.

[0074] The second connecting prism 72 is connected to one end of the second connecting rod 71. The second connecting prism 72 is a hollow octagonal prism structure. At least four sets of eight limiting locking ball grooves 721 are evenly distributed on the top. At least four sets of eight limiting locking balls 722 are nested inside the limiting locking ball grooves 721.

[0075] A return spring 73 is nested between the second connecting prism 72 and the sliding sleeve 74;

[0076] The sliding sleeve 74 is connected to the second connecting prism 72 via a limiting locking ball 722 and a return spring 73. The sliding sleeve 74 is a hollow cylindrical structure with an inner ring that is an octagonal prism shape that matches the second connecting prism 72. At least four sets of eight second limiting grooves 741 are evenly distributed on the sleeve. When the return spring 73 is not compressed, the limiting locking ball 722 is nested between the limiting locking ball groove 721 and the second limiting groove 741.

[0077] Example 1

[0078] In this embodiment, a loosening head 1, a quick-change female head assembly 7, and a 1.2-meter extended handle 8 are used to assemble a loosening rake to solve the problem of blockage at the discharge port A1 of the upstream roller feeding belt conveyor A.

[0079] The specific usage process of this utility model in this embodiment is as follows:

[0080] First, the loosening head 1 is fixed by connecting the quick-change male head 6 on the loosening head 1 to the quick-change female head assembly 7. Then, the extended handle 8 is connected to the quick-change female head assembly 7 by threads to complete the assembly of the loosening rake.

[0081] Furthermore, such as Figure 1 As shown, the operator holds a loosening rake and uses the cylindrical teeth of the loosening head 1 to gently loosen and clear the tobacco leaves A2 that are blocked at the discharge port A1 of the roller feeding conveyor A. The operation is repeated until the feeding conveyor A is completely unblocked.

[0082] Example 2

[0083] In this embodiment, a cleaning rake is assembled using a vertical rake head 2, a flat rake head 3, a quick-change female head assembly 7, and a 0.8-meter extended handle 8. This is to solve the problem of cleaning the wet waste smoke B2 from the discharge trough B downstream of the drum equipment.

[0084] The specific usage process of this utility model in this embodiment is as follows:

[0085] First, fix the vertical rake head 2 / flat rake head 3 by connecting the quick-change male head 6 on the vertical rake head 2 / flat rake head 3 to the quick-change female head assembly 7. Then, connect the extended handle 8 to the quick-change female head assembly 7 by thread to complete the assembly of the cleaning rake.

[0086] Furthermore, such as Figure 2 , Figure 3 As shown, after the drum equipment is stopped and cleaned, a cleaning rake is used to clean the wet waste smoke B2 in the drum discharge trough B. Through the quick-change mechanism of this utility model, the vertical rake head 2 / flat rake head 3 can be quickly replaced. The wet waste smoke B2 in the gap of the drum discharge trough B is cleaned from different angles by the rake teeth in different directions. At the same time, a low-power water pipe is used to further rinse carefully, making the cleaning more thorough.

[0087] Example 3

[0088] In this embodiment, a short-handled cleaning shovel is assembled from a cleaning shovel head 4 and a quick-change female head assembly 7 to solve the problem of transporting wet waste smoke B2 within the cleaning tank B1.

[0089] First, the cleaning shovel head 4 is fixed by connecting and fixing the quick-change male head 6 on the cleaning shovel head 4 to the quick-change female head assembly 7, thus completing the assembly of the short-handled cleaning shovel.

[0090] Furthermore, such as Figure 4 As shown, after the roller discharge trough B is cleaned, use a short-handled cleaning shovel to shovel the wet waste smoke B2 in the cleaning trough B1 into the waste bin, repeating this process until all waste is removed.

[0091] Example 4

[0092] In this embodiment, a loosening rake is assembled from a valve switch sleeve head 5, a quick-change female head assembly 7, and a 2-meter extended handle 8. This is to solve the problem of switching the compressed air valve C near the high-temperature steam pipe C1.

[0093] First, fix the valve switch sleeve head 5 by connecting the quick-change male head 6 on the valve switch sleeve head 5 to the quick-change female head assembly 7. Then, connect the extended handle 8 to the quick-change female head assembly 7 by thread to complete the assembly of the valve switch operating rod.

[0094] Furthermore, such as Figure 5 , Figure 6 , Figure 8 As shown, when it is necessary to open the compressed air valve C, the operator uses the valve switch operating lever to lock the sleeve 51 into the compressed air valve C, and then, driven by the rotating shaft 52, turns the compressed air valve C from vertical to horizontal, so that the compressed air valve C can be opened without climbing or directly contacting the high-temperature steam pipe C1.

[0095] Furthermore, such as Figure 5 , Figure 7 , Figure 8 As shown, when it is necessary to close the compressed air valve C, the operator uses the valve switch operating lever to lock the sleeve 51 into the compressed air valve C, and then, driven by the rotating shaft 52, turns the compressed air valve C from horizontal to vertical, so that the compressed air valve C can be opened without climbing or directly contacting the high-temperature steam pipe C1.

[0096] Finally, it should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A multi-functional quick-change head tool for cigarette production, characterized in that, It includes: Loose head (1), the loose head (1) is composed of a triangular plate and a quick-change male head (6) connected together, and two cylindrical teeth are connected below the triangular plate; Vertical rake head (2), the vertical rake head (2) is composed of a triangular plate and a quick-change male head (6) connected together, and several teeth are connected below the triangular plate, and the direction of the teeth is parallel to the triangular plate; The flat rake head (3) is composed of a triangular plate and a quick-change male head (6). Several teeth are connected to the triangular plate, and the direction of the teeth is perpendicular to the triangular plate. The cleaning shovel head (4) is composed of a shovel blade and a quick-change male head (6). The shovel blade is composed of an irregularly shaped connecting plate, a rectangular bottom plate, and two rectangular side plates. Valve switch sleeve head (5), the valve switch sleeve head (5) is composed of a sleeve (51), a rotating shaft (52), a first connecting rod (53) and a quick-change male head (6). The sleeve (51) is a hollow cylindrical structure connected to a flared mouth. The sleeve (51) is fixedly connected to one end of the rotating shaft (52) and can rotate through the rotating shaft (52) on the opening of the first connecting rod (53). Quick-change male head (6), the quick-change male head (6) is connected to the loosening head (1), the vertical rake head (2), the flat rake head (3), the cleaning shovel head (4), and the valve switch sleeve head (5) respectively; Quick-change female connector assembly (7), one end of which is connected to quick-change male connector (6), and the other end is connected to extension handle (8); The extended handle (8) is a cylindrical rod with a threaded post at one end and anti-slip texture at the other end. The length of the extended handle (8) can be customized according to requirements.

2. The multi-functional quick-change head tool for cigarette production according to claim 1, characterized in that, The quick-change male connector (6) is composed of a cylindrical connecting post and a hollow octagonal prism-shaped first connecting prism (61). At least four sets of eight first limiting grooves (611) are evenly distributed on the first connecting prism (61). The quick-change male connector (6) and the quick-change female connector assembly (7) are matched in shape and structure.

3. The multi-functional quick-change head tool for cigarette production according to claim 1, characterized in that, The quick-change female connector assembly (7) includes: The second connecting rod (71) is connected to the extended handle (8). The second connecting rod (71) is a hollow cylindrical rod with a thread inside one end. The second connecting prism (72) is connected to one end of the second connecting rod (71). The second connecting prism (72) is a hollow octagonal prism structure with at least four sets of eight limiting locking ball grooves (721) evenly distributed on it. At least four sets of eight limiting locking balls (722) are nested inside the limiting locking ball grooves (721). A return spring (73) is nested between the second connecting prism (72) and the sliding sleeve (74); The sliding sleeve (74) is connected to the second connecting prism (72) via a limiting locking ball (722) and a return spring (73). The sliding sleeve (74) is a hollow cylindrical structure with an inner ring that is an octagonal prism shape that matches the second connecting prism (72). At least four sets of eight second limiting grooves (741) are evenly distributed on the upper part. When the return spring (73) is not compressed, the limiting locking ball (722) is nested between the limiting locking ball groove (721) and the second limiting groove (741).

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