Sleeve taking-out mechanism and sleeve taking-out device

Abstract

The utility model discloses a sleeve taking-out mechanism and a sleeve taking-out device. The sleeve taking-out mechanism comprises a rotating seat and a screwing module, the rotating seat is connected with the screwing module in a sliding fit manner; a connecting hole is vertically formed in the central position of the rotating seat in a penetrating manner; the screwing module comprises a connecting rod and a screwing column which are vertically distributed; the top end of the connecting rod is positioned in the connecting hole of the rotating seat; after the connecting rod penetrates through the connecting hole, the bottom end of the connecting rod is connected with the top of the screwing column; the top end of the connecting rod is used for being connected with an internal hexagonal wrench or a power output end of an external electric tool; an external thread is arranged on the circumferential outer wall of the screwing column; the screwing column is used for being in threaded connection with the interior of the hollow nylon sleeve needing to be taken out; the bottom end of the rotating seat is connected with the top of the nylon sleeve. According to the utility model, the nylon sleeve can be conveniently and quickly taken out from the stainless steel sleeve, the working time for replacing the nylon sleeve is shortened, and the daily maintenance quality and maintenance efficiency of the embedded nut group are ensured.

Description

Technical Field

[0001] This utility model relates to the field of railway transportation technology, and in particular to a sleeve removal mechanism and sleeve removal device. Background Technology

[0002] See Figures 1 to 4 As shown, for the railway concrete track slab 1 (i.e. railway hump yard sleeper), most of the embedded parts are embedded nut groups 2. The embedded nut group 2 includes a stainless steel sleeve 21 and a nylon sleeve 22. The hollow nylon sleeve 22 is embedded in the hollow stainless steel sleeve 21, and the connection between the nylon sleeve 22 and the stainless steel sleeve 21 is threaded (the external thread on the nylon sleeve 22 is threadedly connected to the internal thread of the stainless steel sleeve 21).

[0003] Among them, the stainless steel sleeve 21 will be poured together with the cement after the concrete track slab 1 is poured. After the cement solidifies, the stainless steel sleeve 21 cannot be disassembled. However, if the nylon sleeve 22 is damaged during use, it needs to be replaced, that is, the old nylon sleeve is removed and a new nylon sleeve is installed.

[0004] It should be noted that the inner wall of the nylon sleeve 22 has nylon threads, which are threaded to the wire thread sleeve 23 placed inside the nylon sleeve 22.

[0005] In practical applications, for external railway equipment that needs to be fixed to the concrete track slab 1 of the railway, the pre-embedded nut group 2 is fixedly connected by fastening bolts. Specifically, the bolt thread passes through the bolt through hole on the mounting seat of the external railway equipment from top to bottom, and then the bolt thread part of the fastening bolt is threadedly connected to the wire thread sleeve 23 inside the nylon sleeve 22, thereby ensuring the fixing effect.

[0006] In practice, to prevent the bolts from becoming loose, the on-site personnel used a high-torque wrench for tightening. Due to the excessive tightening torque, the wire thread insert 23 inside the nylon sleeve 22 gradually contracts and tightens with the threads of the bolt. The bolt causes the wire thread insert 23 to rotate continuously. Since the strength of the nylon threads on the inner wall of the nylon sleeve 22 (used to match the threads of the wire thread insert 23) is lower than the thread strength of the wire thread insert 23, the wire thread insert 23 is prone to damage to the nylon threads inside the nylon sleeve 22 during rotation, or even wear down the nylon threads inside the nylon sleeve 22. Ultimately, this prevents the bolt from being tightened again, rendering the nylon sleeve unusable.

[0007] However, there are currently no convenient tools for removing nylon sleeves. Only a flat tool (knife) with a tapered tip can be used, and the tool's end must be struck with a hammer to enter the nylon sleeve. Because the hollow nylon sleeve 22 contains spirally distributed wire threaded inserts 23, the flat tool cannot properly engage with the sleeve. If the striking force is too great, the nylon sleeve may break. Once broken, removal becomes much more difficult, and the nylon sleeve 22 cannot be removed as a whole. If the striking force is too small, the nylon sleeve and tool will not be securely engaged (i.e., not firmly secured), and the nylon sleeve cannot be removed. Therefore, disassembling the nylon sleeve is extremely difficult, severely impacting the quality and efficiency of daily maintenance of the embedded nut assembly and increasing the workload of the workers.

[0008] It should be noted that the wire thread insert 23 and the nylon sleeve 22 are connected by a threaded installation structure. Nylon itself has a certain degree of plastic deformation. After the disc tool penetrates into the nylon sleeve, it contacts the internal thread of the wire thread insert 23. Due to the high strength of the internal thread of the wire thread insert 23, the disc tool cannot fully embed itself into the thread. Instead, the disc tool can only gradually force the wire thread insert 23 into the nylon thread of the nylon sleeve 22. Because this connection is flexible, the disc tool cannot be properly secured to the nylon sleeve 22. Therefore, there is an urgent need to develop a technology that can solve the above technical problems. Utility Model Content

[0009] The purpose of this utility model is to address the technical deficiencies of the existing technology by providing a cannula removal mechanism and a cannula removal device.

[0010] Therefore, this utility model provides a sleeve removal mechanism, which includes a rotating seat and a tightening module;

[0011] The rotating base and the tightening module are connected by a sliding fit.

[0012] A connection hole is vertically inserted through the center of the rotating base;

[0013] The tightening module includes vertically distributed connecting rods and tightening pins;

[0014] The top of the connecting rod is located in the connecting hole of the rotating seat;

[0015] After the connecting rod passes through the connecting hole, its bottom end is connected to the top of the tightening column;

[0016] The top of the connecting rod is used to connect to an Allen wrench or to the power output of an external power tool;

[0017] The outer circumferential wall of the screw-in column is provided with external threads;

[0018] The screw-on pin is used for threaded connection to the inside of the hollow nylon sleeve that needs to be removed.

[0019] In addition, this utility model also provides a cannula removal device, which includes the cannula removal mechanism as described above, and an electric wrench;

[0020] The power output end of the electric wrench is connected to the top of the connecting rod in the sleeve removal mechanism.

[0021] As can be seen from the technical solution provided by this utility model above, compared with the prior art, this utility model provides a sleeve removal mechanism and sleeve removal device. Its structure is scientifically designed, which can conveniently and quickly remove the nylon sleeve from the stainless steel sleeve, shorten the working time of replacing the nylon sleeve, thereby ensuring the quality and efficiency of daily maintenance of the pre-embedded nut group, reducing the workload of the staff, and has great practical significance.

[0022] By applying this invention, the nylon sleeve can be completely removed from the stainless steel sleeve, significantly improving work efficiency. Attached Figure Description

[0023] Figure 1 A schematic diagram of a structure with multiple pre-embedded nut groups installed on a concrete track slab for railway use;

[0024] Figure 2 This is a structural diagram of a complete pre-embedded nut assembly. At this point, the nylon sleeve is in a normal, undamaged state.

[0025] Figure 3 This is a three-dimensional structural diagram of a stainless steel sleeve included in a pre-embedded nut assembly.

[0026] Figure 4 This is a three-dimensional structural diagram of a nylon sleeve included in a pre-embedded nut assembly.

[0027] Figure 5 A three-dimensional structural diagram of a cannula removal mechanism provided by this utility model. Figure 1 ;

[0028] Figure 6 A three-dimensional structural diagram of a cannula removal mechanism provided by this utility model. Figure 2 ;

[0029] Figure 7 A three-dimensional structural diagram of the rotating seat in a sleeve removal mechanism provided by this utility model. Figure 1 ;

[0030] Figure 8 A three-dimensional structural diagram of the rotating seat in a sleeve removal mechanism provided by this utility model. Figure 2;

[0031] Figure 9 A three-dimensional structural diagram of the tightening module in a sleeve removal mechanism provided by this utility model;

[0032] Figure 10 A schematic diagram of the three-dimensional structure of the connecting rod in the tightening module of the sleeve removal mechanism provided by this utility model. Figure 1 ;

[0033] Figure 11 A schematic diagram of the three-dimensional structure of the connecting rod in the tightening module of the sleeve removal mechanism provided by this utility model. Figure 2 ;

[0034] Figure 12 A three-dimensional structural diagram of the tightening column in the tightening module of a sleeve removal mechanism provided by this utility model;

[0035] In the diagram: 1. Concrete track slab for railway; 2. Embedded nut assembly; 21. Stainless steel sleeve; 22. Nylon sleeve.

[0036] 3. Rotary seat; 4. Tightening module;

[0037] 31. Connecting hole;

[0038] 41. Connecting rod; 42. Tightening post. Detailed Implementation

[0039] 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 protection scope of the present utility model.

[0040] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0041] In the description of this patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection or setting, a detachable connection or setting, or an integral connection or setting. Those skilled in the art can understand the specific meaning of the above terms in this patent according to the specific circumstances.

[0042] Furthermore, the terms "first" and "second" 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 indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] See Figures 1 to 12 This utility model provides a sleeve removal mechanism, including: a rotating seat 3 and a tightening module 4;

[0044] The rotating base 3 and the tightening module 4 are connected by a sliding fit;

[0045] A connecting hole 31 is vertically provided through the center of the rotating base 3;

[0046] The tightening module 4 includes a vertically distributed connecting rod 41 and a tightening column 42;

[0047] The top end of the connecting rod 41 is located in the connecting hole 31 of the rotating seat 3;

[0048] After the connecting rod 41 passes through the connecting hole 31, its bottom end is connected to the top of the tightening post 42;

[0049] The top end of the connecting rod 41 is used to connect to an internal hex wrench or to the power output end (e.g., a collet, specifically a hexagonal connecting rod mounted on the collet) of an external power tool (e.g., an electric wrench).

[0050] The outer circumferential wall of the screw-in column 42 is provided with external threads;

[0051] The tightening post 42 is used to connect with the inside of the hollow nylon sleeve 22 that needs to be removed (specifically, it is to be fixedly connected with the internal thread of the wire thread sleeve 23 set inside the nylon sleeve 22).

[0052] The bottom end of the rotating seat 3 (specifically the support bar 330 and the positioning cylinder 331) is connected to the top of the nylon sleeve 22 that needs to be removed.

[0053] It should be noted that the nylon sleeve 22 is installed inside the stainless steel sleeve 21; the stainless steel sleeve 21 is fixedly installed in the railway concrete track slab 1. The wire thread insert 23 is located in the middle and lower regions inside the nylon sleeve 22.

[0054] In this utility model, specifically, the upper part of the rotating base 3 is an outer hexagonal block 32;

[0055] The upper section of the connecting hole 31 is located at the center of the outer hexagonal block 32.

[0056] In practice, the lower part of the rotating seat 3 is the rotating base 33;

[0057] The lower section of the connecting hole 31 is located at the center of the rotating base 33.

[0058] The bottom surface of the rotating base 33 has four radially distributed support bars 330 protruding downwards;

[0059] The connecting hole 31 is located on the inner side of the four support bars 330;

[0060] Between any two adjacent support bars 330, there are radially distributed positioning grooves;

[0061] A positioning cylinder 331 is provided protruding downwards on the bottom surface of the rotating base 33;

[0062] Positioning cylinder 331 fits against the inside of the top opening of the nylon sleeve 22 that needs to be removed;

[0063] The radial inner end of the support bar 330 is connected to the circumferential outer wall of the positioning cylinder 331.

[0064] Furthermore, the four support bars 330 are inserted into the four grooves 220 on the top of the nylon sleeve 22 that needs to be removed.

[0065] It should be noted that the support bar 330 corresponds to and matches the shape and size of the groove 220 on the top of the nylon sleeve 22.

[0066] Furthermore, the multiple support bars 330 are rotationally symmetrically distributed, specifically in a cross shape.

[0067] It should be noted that the upper part of the rotating base 3 is an external hexagonal structure (external hexagonal block 32), and there is a connecting hole 31 inside the external hexagonal block 32 to facilitate the free movement of the tightening module 4. The bottom of the rotating base 3 is a four-corner structure, and the connecting rod 41 in the tightening module 4 can move freely in the connecting hole 31.

[0068] In this utility model, specifically, the connecting rod 41 includes a tool docking block 411 and a tightening column docking rod 412 distributed vertically.

[0069] Tool docking block 411 is located in the connecting hole 31 of the rotary seat 3;

[0070] The tool docking block 411 is connected to the top of the tightening column docking rod 412;

[0071] The tool docking block 411 is provided with an internal hexagonal hole 4110 with a top opening;

[0072] The 4110 internal hexagonal hole is used to connect to an internal hexagonal wrench, or to a hexagonal mating rod (i.e., a hexagonal head) mounted on the power output end (e.g., a chuck) of an external power tool (e.g., an electric wrench).

[0073] It should be noted that the shape and size of the hexagonal mating rod installed on the power output end (e.g., chuck) of the external power tool (e.g., electric wrench) correspond to and match the shape and size of the internal hexagonal hole 4110 at the top of the connecting rod 41.

[0074] It should be noted that the shape and size of the hex wrench correspond to and match the shape and size of the hexagonal hole 4110 at the top of the connecting rod 41.

[0075] In practice, the screw-on rod 412 is cylindrical in shape.

[0076] In specific implementation, the connecting hole 31 of the rotating seat 3 is a stepped hole;

[0077] The connecting hole 31 includes an upper hole section 311 and a lower hole section 312 that are interconnected.

[0078] The upper hole section 311 is located at the top of the lower hole section 312;

[0079] The diameter of the upper hole section 311 is larger than the diameter of the lower hole section 312;

[0080] Furthermore, the center points of the upper hole section 311 and the lower hole section 312 are located on the same vertical center line.

[0081] Furthermore, the diameter of the tool docking block 411 is larger than the diameter of the lower hole section 312 of the connecting hole 31, and smaller than the diameter of the upper hole section 311 of the connecting hole 31.

[0082] Furthermore, the diameter of the screw-on rod 412 is smaller than the diameter of the lower section 312 of the connecting hole 31.

[0083] In practice, a square docking block 4120 (shaped like a cuboid) is provided at the lower end of the screw-tightening column docking rod 412;

[0084] The top of the screw-in post 42 has an upward-opening inner square hole 420;

[0085] The square connecting block 4120 of the tightening post connecting rod 412 is inserted into the inner square hole 420 of the tightening post 42.

[0086] It should be noted that, for this utility model, the tightening module 4 includes a connecting rod 41 and a tightening column 42. The head of the connecting rod 41 is a hexagonal structure, which is convenient for tightening with an internal hex wrench. The bottom of the connecting rod 41 is a square structure (square mating block 4120).

[0087] The tightening post 42 has an external M24 thread structure and an internal square structure on the top surface (internal square hole 420);

[0088] The square structure (square mating block 4120) at the bottom of the connecting rod 41 fits tightly with the square structure (inner square hole 420) inside the tightening column 42, and the two are connected together to form a whole, forming the tightening module 4.

[0089] Based on the sleeve removal mechanism provided by the present invention, the present invention also provides a sleeve removal device, which includes the sleeve removal mechanism 100 as described above, and an electric wrench.

[0090] The power output end (e.g., the chuck) of the electric wrench is connected to the top end (specifically, the internal hexagonal hole 4110 at the top) of the connecting rod 41 in the sleeve removal mechanism 100.

[0091] In this utility model, specifically, a hexagonal connecting rod is provided on the power output end (e.g., the chuck) of the electric wrench;

[0092] The hexagonal connecting rod is connected (e.g., plugged in) to the internal hexagonal hole 4110 at the top of the connecting rod 41 in the sleeve removal mechanism 100.

[0093] In practice, the hexagonal connecting rod can be a vertically distributed, elongated rod-shaped joint, and its cross-sectional shape is a regular hexagon.

[0094] It should be noted that the shape and size of the hexagonal mating rod installed on the power output end (e.g., chuck) of the external power tool (e.g., electric wrench) correspond to and match the shape and size of the internal hexagonal hole 4110 at the top of the connecting rod 41.

[0095] In this utility model, specifically, the power output end of the electric wrench, for example, is the chuck of the electric wrench, which is connected to one end of the hexagonal connecting rod (clamping connection or snap-fit ​​connection), and the other end of the hexagonal connecting rod is connected to the inner hexagonal hole 4110 at the top of the connecting rod 41 (for example, plug-in connection).

[0096] It should be noted that the connection between the power output end of the electric wrench and the hexagonal connecting rod can be a clamping connection, a snap-fit ​​connection, or other reliable connection methods. This is a conventional and mature technology, and will not be elaborated further here.

[0097] It should be noted that the preferred electric wrench is a brushless electric wrench. Electric wrenches are also known as electric screwdrivers or electric hand drills. They are a mature and widely used general-purpose tool, and will not be elaborated on here.

[0098] To better understand the technical solution of this utility model, the working principle of this utility model is explained below.

[0099] It should be noted that, for this utility model, an electric wrench can be used, with the end of the wrench holding an internal hex wrench (or an internal hex wrench can be used directly). The hex wrench is placed in the internal hexagonal hole 4110 at the top of the connecting rod 41. The electric wrench rotates clockwise (tightens), driving the tightening module 4 to enter the interior of the nylon sleeve 22 through the external thread of the tightening column 42 and to achieve a secure fastening with the internal thread of the wire thread sleeve 23. After tightening, the bottom of the cylindrical head (i.e., the tool docking block 41) at the top of the connecting rod 41 is tightly attached to the upper side of the connecting hole 31 of the rotating seat 3, and the rotating seat 3 is pressed. At this time, an electric wrench with a square head (i.e., a socket head) is replaced, and a socket wrench is installed on the square head. The socket wrench is placed on the outside of the external hexagonal block 32 at the top of the rotating shaft.

[0100] The cross groove structure at the bottom of the rotating seat 3 (i.e., the positioning groove between the support bars 330) cooperates with the cross groove structure at the top of the nylon sleeve 22 (i.e., the groove 220 at the top). The middle cylinder of the cross groove structure (i.e., the positioning cylinder 331) serves as a positioning post, closely attached to the inner side of the top opening of the nylon sleeve 22, as a positioning structure. At this time, when the electric wrench is turned in reverse, the socket head rotates in the opposite direction, driving the rotating seat 3 to rotate. The cross groove structure of the rotating seat 3 (i.e., the positioning groove between the support bars 330) simultaneously drives the nylon sleeve 22 to rotate. At the same time, the tightening module 4 at the bottom drives the steel wire thread sleeve 23 inside the nylon sleeve. The two rotate together, allowing the nylon sleeve 22 to be removed from the stainless steel sleeve 21.

[0101] It should be noted that because nylon material is prone to aging and its strength is easily reduced, a single unscrewing structure can easily cause the nylon sleeve to break when it is removed. Only when two structures (i.e., the tightening structure with tightening module 4 as the main body and the cross groove structure with rotating seat 3 as the main body) are used together can the nylon sleeve in the pre-embedded nut be effectively removed.

[0102] To better understand the technical solution of this utility model, the specific operation process of this utility model is described below.

[0103] First, place the four corner structures (including four support bars 330) at the bottom of the rotating seat 3 into the four grooves 220 on the upper part of the nylon sleeve 22 in the pre-embedded nut group 2, and press down by hand so that the tightening module 4 slides into the nylon sleeve 22 inside the pre-embedded nut group 2 through the connecting hole 31 in the rotating seat 3. Then, rotate the tightening module 4 by hand so that a part of the thread on the outside of the tightening column 42 in the tightening module 4 (i.e. a small section) engages with the internal thread (i.e. the internal thread of the wire thread insert 23) inside the nylon sleeve 22, and thus slowly screw it into the nylon sleeve 22.

[0104] The second step is to use a power tool (such as an electric wrench) with a hexagonal head (i.e., a hexagonal connecting rod) to insert the hexagonal head (i.e., a hexagonal connecting rod) into the internal hexagonal hole 4110 (hexagonal structure) at the top of the connecting rod 41 to tighten the connecting rod. The connecting rod 41 drives the tightening column 42, which is quickly screwed into the nylon sleeve 22 inside the pre-embedded nut group 2 (i.e., the inside of the wire thread sleeve 23 installed inside the hollow nylon sleeve 22) through its external thread. After a firm connection, the bottom surface of the head of the connecting rod 41 (i.e., the tool connecting block 411) is attached to and tightened with the upper surface of the connecting hole 31 of the rotating seat 3 (because the tool connecting block 411 has pressed down on the upper surface of the connecting hole 31).

[0105] Third, use the socket head that comes with the electric wrench (the electric wrench comes with a socket head, which is installed on the power output end of the electric wrench. The socket head has an internal hexagonal hole with an opening at the bottom, which corresponds to the shape and size of the external hexagonal block 32. The socket head is placed on the outside of the external hexagonal block 32 of the rotating seat 3) to align with the external hexagonal block 32. Then, control the power output end of the electric wrench to rotate in the opposite direction. At this time, the reverse force of the electric wrench and the force of the thread being unscrewed combine to screw the nylon sleeve 22 inside the pre-embedded nut group 2 upward and outward, thus achieving the purpose of disassembling the entire nylon sleeve 22.

[0106] It should be noted that for this utility model, the nylon sleeve 22 that needs to be removed and taken out must have a groove 220 on the top of the nylon sleeve 22 that can be used normally, so that the rotating seat 3 can reliably position and connect the nylon sleeve 22, and then, under the drive of external force, the rotating seat 3 can drive the nylon sleeve 22 to rotate together.

[0107] Compared with the prior art, the cannula removal mechanism and cannula removal device provided by this utility model have the following advantages:

[0108] 1. By applying this utility model, the operation is convenient. It only requires the use of general tools (internal hex wrench and extension wrench with socket) or electric universal wrench to complete the removal of nylon sleeves.

[0109] 2. The tightening module 4 of this utility model has a positioning rod (i.e., connecting rod 41). The external thread on the tightening column 42 at the bottom of the tightening module 4 tightens the wire thread sleeve 23 inside the nylon sleeve 22 and positions it with the rotating seat 3.

[0110] 3. The rotating seat 3 has a cross-groove positioning structure (i.e., the positioning groove between the support bars 330), which is positioned with the existing structure outside the nylon sleeve 22 (i.e., the groove 220 on the top).

[0111] 4. In this utility model, the tightening structure (i.e., tightening module 4) and the cross groove positioning structure on the rotating seat 3 are used together to remove the nylon sleeve 22 from the stainless steel sleeve without damaging it.

[0112] 5. The connecting rod 41 in the rotating seat 3 can move freely through the connecting hole 31, which facilitates the tightening of the external thread of the tightening column 42 in the module 4 and the internal wire thread sleeve 23 of the nylon sleeve 22.

[0113] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A cannula removal mechanism, characterized in that, Includes a rotating base (3) and a tightening module (4); The rotating seat (3) and the tightening module (4) are connected by a sliding fit; A connecting hole (31) is vertically provided through the center of the rotating base (3); The tightening module (4) includes vertically distributed connecting rods (41) and tightening pins (42); The top of the connecting rod (41) is located in the connecting hole (31) of the rotating seat (3); After the connecting rod (41) passes through the connecting hole (31), its bottom end is connected to the top of the tightening post (42); The top of the connecting rod (41) is used to connect to an internal hex wrench or to the power output of an external power tool; The outer circumferential wall of the screw-in column (42) is provided with external threads; Tightening post (42) is used to connect with the inside of the hollow nylon sleeve (22) that needs to be removed by thread; The bottom end of the rotating seat (3) is connected to the top of the nylon sleeve (22).

2. The cannula removal mechanism as described in claim 1, characterized in that, The upper part of the rotating base (3) is an outer hexagonal block (32); The upper section of the connecting hole (31) is located at the center of the outer hexagonal block (32).

3. The cannula removal mechanism as described in claim 1, characterized in that, The lower part of the rotating seat (3) is the rotating base (33); The lower section of the connecting hole (31) is located at the center of the rotating base (33); The bottom surface of the rotating base (33) is provided with four radially distributed support bars (330) protruding downwards; The connecting hole (31) is located on the inner side of the four support bars (330); Between any two adjacent support bars (330), there are radially distributed positioning grooves.

4. The cannula removal mechanism as described in claim 3, characterized in that, A positioning cylinder (331) is provided protruding downward on the bottom surface of the rotating base (33); The positioning cylinder (331) fits against the inside of the top opening of the nylon sleeve (22) that needs to be removed; The radial inner end of the support bar (330) is connected to the circumferential outer wall of the positioning cylinder (331).

5. The cannula removal mechanism as described in claim 3, characterized in that, Four support bars (330) are inserted into four grooves (220) on the top of the nylon sleeve (22) to be removed; The support bar (330) is shaped and matched to the groove (220) at the top of the nylon sleeve (22).

6. The cannula removal mechanism as described in any one of claims 1 to 5, characterized in that, The connecting rod (41) includes a tool docking block (411) distributed vertically and a tightening column docking rod (412); The tool docking block (411) is located in the connecting hole (31) of the rotary seat (3); The tool docking block (411) is connected to the top of the tightening column docking rod (412); The tool docking block (411) is provided with an internal hexagonal hole (4110) with a top opening; The internal hexagonal hole (4110) is used to connect to an internal hexagonal wrench or to a hexagonal mating rod mounted on the power output end of an external power tool.

7. The cannula removal mechanism as described in claim 1, characterized in that, The connecting hole (31) of the rotating seat (3) is a stepped hole; The connecting hole (31) includes an upper hole section (311) and a lower hole section (312) that are interconnected; The upper hole section (311) is located at the top of the lower hole section (312); The diameter of the upper hole section (311) is larger than the diameter of the lower hole section (312).

8. The cannula removal mechanism as described in claim 7, characterized in that, The center points of the upper hole section (311) and the lower hole section (312) are located on the same vertical center line; The diameter of the tool docking block (411) is larger than the diameter of the lower hole section (312) of the connecting hole (31) and smaller than the diameter of the upper hole section (311) of the connecting hole (31); The diameter of the screw-on rod (412) is smaller than the diameter of the lower section (312) of the connecting hole (31).

9. The cannula removal mechanism as described in claim 6, characterized in that, A square connecting block (4120) is provided at the lower end of the screw-in column connecting rod (412); The top of the screw-in column (42) has an inner square hole (420) with the opening facing upward; The square connecting block (4120) of the screw-tightening post connecting rod (412) is inserted into the inner square hole (420) of the screw-tightening post (42).

10. A cannula removal device, characterized in that, Includes a cannula removal mechanism as described in any one of claims 1 to 9, and an electric wrench; The power output end of the electric wrench is connected to the top of the connecting rod (41) in the sleeve removal mechanism (100).

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