Hardware machining anti-splashing structure

Abstract

The utility model relates to a hardware machining anti -spatter structure of iron chip, including the protection cover, support subassembly and fixed subassembly that connect gradually, the protection cover is used for preventing iron chip splashing, support subassembly is used for making the protection cover be in the state of suspension, fixed subassembly is used for with support subassembly and protection cover fixed on hardware machining device, through the clamp will be processed sheet -shaped iron -based hardware fixed, and put on the workbench, open switch button, make the annular electromagnet piece of protection cover inner wall power supply produces magnetism, drive protection cover adsorption and cover processing area, when operating drill passes through protection cover top hollow area operation, protection cover horn -like structure and guide camber block and guide iron chip gathering, simultaneously annular electromagnet piece adsorption iron chip to avoid its splashing.

Description

Technical Field

[0001] This utility model belongs to the field of hardware processing technology, specifically relating to a structure for preventing iron filings from splashing during hardware processing. Background Technology

[0002] The processing of hardware components involves transforming raw metal materials into hardware products with specific shapes, sizes, and properties through a series of processes. The processing techniques are diverse, and the appropriate method must be selected based on the characteristics of the raw materials, the specific requirements of the product, and the scale of production.

[0003] Taking bench drill processing as an example, when drilling holes in sheet-shaped iron-based hardware, the material must first be firmly fixed, and then the operator operates the handle to drive the drill bit down to complete the drilling of the material.

[0004] However, with existing bench drills, the processing area of ​​the material is exposed after it is fixed in place. Since this type of material is mainly composed of iron, iron filings are generated when the drill bit contacts the material for cutting. These filings can fly in all directions, easily causing injury to workers, such as skin abrasions or getting into their eyes. To address this problem, we have proposed a structure to prevent iron filings from flying during the processing of hardware parts. Utility Model Content

[0005] The purpose of this utility model is to provide a structure for preventing iron filings from splashing during hardware processing, in order to solve the problems existing in the background art.

[0006] To achieve the above technical objectives, the technical solution adopted by this utility model is as follows:

[0007] A structure for preventing iron filings from splashing during hardware processing includes a protective cover, a support assembly, and a fixing assembly connected in sequence.

[0008] The protective cover is used to prevent iron filings from flying;

[0009] The support component is used to keep the protective cover in a suspended state;

[0010] The fixing component is used to fix the support component and the protective cover to the hardware processing device.

[0011] Further specifying, the support component includes:

[0012] Two connecting blocks are symmetrically fixed to the outside of the protective cover, and grooves are provided on the same side of both connecting blocks;

[0013] Two connecting plates are respectively disposed inside the two grooves;

[0014] A T-shaped mounting plate is fixedly connected to the end of the two connecting plates away from the protective cover;

[0015] A rotating rod, one end of which is fixedly connected to the lower part of the T-shaped mounting plate;

[0016] An extension plate, with the other end of the rotating rod rotatably connected to the upper part of the extension plate.

[0017] Further specifying, a battery and a switch button are installed on the T-shaped mounting plate, and an annular electromagnet is provided on the lower side of the inner wall of the protective cover. The annular electromagnet, the switch button, and the battery are sequentially electrically connected.

[0018] Further specifying, each of the two grooves is provided with a spring-back assembly, the spring-back assembly comprising:

[0019] A spring, wherein the spring is disposed between the connecting plate and the groove;

[0020] A stabilizer bar is provided inside the groove, and the spring and the connecting plate are both sleeved on the outside of the stabilizer bar.

[0021] Further specifying, a locking assembly is provided between the rotating rod and the extension plate, the locking assembly comprising:

[0022] The rotating block has a cavity inside the extension plate, and the rotating block is rotatably disposed inside the cavity. The extension plate has a through hole communicating with the cavity, and one end of the rotating rod passing through the through hole is fixedly connected to the rotating block.

[0023] The locking bolt has a threaded hole on the side of the extension plate that communicates with the cavity. The locking bolt is threadedly connected to the threaded hole. The outer side of the rotating block has four evenly distributed friction surfaces, and one end of the locking bolt that extends into the cavity presses against the friction surfaces.

[0024] Further specifying, the fixing component includes:

[0025] The fixing seat has an internal threaded groove.

[0026] A threaded rod, wherein the threaded rod is threadedly connected to the internal thread groove;

[0027] A positioning head, which is fixedly connected to the threaded rod;

[0028] The mounting ring is fixedly disposed on the outside of the threaded rod, and the extension plate damping sleeve is disposed on the outside of the mounting ring.

[0029] The beneficial effects of this utility model are:

[0030] 1. By setting up a protective cover, its horn-shaped structure and guide arc surface can physically block iron filings from flying and guide them to gather. Compared with the existing exposed processing area of ​​bench drills, this can directly avoid injury to workers from iron filings.

[0031] 2. An electrical connection is formed between the battery and switch button on the T-shaped mounting plate and the annular electromagnet plate on the inner wall of the protective cover. During processing, the electromagnet plate generates magnetism to attract iron filings. After the switch is turned off, the magnetism disappears, making it easy to clean. Compared with existing iron filings without the iron filings attraction function, this can prevent iron filings from scattering or splashing again inside the protective cover, thus improving the ease of cleaning. Attached Figure Description

[0032] This utility model can be further illustrated by the non-limiting embodiments given in the accompanying drawings.

[0033] Figure 1 This is a schematic diagram of the structure of the anti-splattering structure for hardware processing according to this utility model. Figure One ;

[0034] Figure 2 This is a schematic diagram of the structure of the anti-splattering structure for hardware processing according to this utility model. Figure Two ;

[0035] Figure 3 This is a partial cross-sectional view of a metal chip anti-splash structure for metal processing according to this utility model. Figure One ;

[0036] Figure 4 This is a partial cross-sectional view of a metal chip anti-splash structure for metal processing according to this utility model. Figure Two ;

[0037] Figure 5 This is a schematic diagram of the installation structure of the anti-splatter structure for hardware processing according to this utility model. Figure One ;

[0038] Figure 6 This is a schematic diagram of the installation structure of the anti-splatter structure for hardware processing according to this utility model. Figure Two .

[0039] The symbols for the main components are explained below:

[0040] Protective cover 100, connecting block 101, groove 102, connecting plate 103, T-shaped mounting plate 104, rotating rod 105, extension plate 106.

[0041] Battery 200, switch button 201, annular electromagnet 202, spring 203, stabilizer bar 204.

[0042] Rotating block 300, cavity 301, locking bolt 302, threaded hole 303

[0043] Fixed base 400, internal thread groove 401, threaded rod 402, positioning head 403, mounting ring 404. Detailed Implementation

[0044] To enable those skilled in the art to better understand this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] like Figures 1-6 As shown, a structure for preventing iron filings from splashing during hardware processing includes a protective cover 100, a support assembly, and a fixing assembly connected in sequence.

[0046] Protective cover 100 is used to prevent iron filings from flying;

[0047] Support components are used to keep the protective cover 100 suspended in the air;

[0048] A fixing component is used to fix the support component and the protective cover 100 to the hardware processing device.

[0049] The core function of the protective cover 100 is to physically block the iron filings generated during the processing, preventing them from flying around and directly avoiding injuries such as cuts or eye contact to workers.

[0050] The protective cover 100 is designed in a trumpet shape, with a smaller top and a larger bottom. Its top center is hollow to provide a working channel for the drill bit, ensuring that the protective cover 100 can cover the drilling area during processing.

[0051] The upper end of the protective cover 100 is set with a guide arc surface that rolls inward toward its inner wall to further optimize the guidance of iron filings;

[0052] The protective cover is made of transparent elastic rubber material such as silicone or polyurethane rubber, which not only meets the need for visualization of the processing status, but also buffers the impact of external forces through elastic deformation. It has wear-resistant and shatter-resistant properties, ensuring the long-term stable use of the protective structure.

[0053] The support component, as an intermediate structure connecting the protective cover 100 and the fixing component, supports the protective cover 100 so that it is suspended in the air, ensuring that the protective cover 100 is accurately aligned with the processing position, maintaining its protective function without affecting the processing operation.

[0054] The fixing component securely fixes the support component and the protective cover 100 to the hardware processing device, ensuring that the entire anti-splash structure does not loosen or shift during processing, thus guaranteeing the stability of the protection.

[0055] Supporting components include:

[0056] Two connecting blocks 101 are symmetrically fixed to the outside of the protective cover 100, and grooves 102 are provided on the same side of both connecting blocks 101.

[0057] Two connecting plates 103 are respectively disposed inside two grooves 102;

[0058] T-shaped mounting plate 104, T-shaped mounting plate 104 is fixedly connected to the end of two connecting plates 103 away from the protective cover 100;

[0059] Rotating rod 105, one end of which is fixedly connected to the lower part of T-shaped mounting plate 104;

[0060] The other end of the extension plate 106 and the rotating rod 105 are rotatably connected to the upper part of the extension plate 106.

[0061] The connecting block 101 is symmetrically fixed on the outside of the protective cover 100. The groove 102 on the same side provides installation space for the connecting plate 103, which serves as a bridge connecting the protective cover 100 and the connecting plate 103, so that the protective cover 100 can form a stable connection with the subsequent components through the connecting block 101.

[0062] The connecting plate 103 is respectively set inside the two grooves 102. One end is indirectly connected to the protective cover 100 through the connecting block 101, and the other end is fixedly connected to the T-shaped mounting plate 104. Its main function is to transmit the force of the protective cover 100 to the T-shaped mounting plate 104. At the same time, it can move a certain amount within the groove 102, providing the possibility for adjusting the position of the protective cover 100.

[0063] The T-shaped mounting plate 104 is fixedly connected to the end of the two connecting plates 103 away from the protective cover 100. On the one hand, it serves as a load-bearing component, where other components such as the battery 200 and the switch button 201 can be installed. On the other hand, it further transmits the force transmitted by the connecting plate 103 to the rotating rod 105, so that the rotating rod 105 can support the protective cover 100, the connecting plate 103 and the T-shaped mounting plate 104.

[0064] The rotating rod 105 is fixedly connected at one end to the lower part of the T-shaped mounting plate 104 and rotatably connected at the upper part of the extension plate 106. It can rotate around the connection point with the extension plate 106, thereby driving the T-shaped mounting plate 104, the connecting plate 103 and the protective cover 100 to rotate together, so that the protective cover 100 can rotate in the horizontal direction.

[0065] The extension plate 106 is rotatably connected to the end of the rotating rod 105 away from the T-shaped mounting plate 104. As an intermediate transition component in the support assembly, it connects the rotating rod 105 to the fixed assembly, providing support and force transmission, while also providing a stable fulcrum for the rotation of the rotating rod 105.

[0066] A battery 200 and a switch button 201 are installed on the T-shaped mounting plate 104. An annular electromagnet 202 is provided on the lower side of the inner wall of the protective cover 100. The annular electromagnet 202, the switch button 201 and the battery 200 are electrically connected in sequence.

[0067] The storage battery 200, as a power supply device, provides electrical energy to the ring electromagnet 202 and is the energy source of the entire electrical circuit.

[0068] The switch button 201, as the control component of the circuit, is connected in series between the battery 200 and the ring electromagnet 202, and controls the opening or closing of the circuit through its own on / off state.

[0069] When the switch button 201 is in the open state, the circuit is connected and the annular electromagnet 202 receives electrical energy.

[0070] When the switch button 201 is in the closed state, the circuit is broken and the annular electromagnet stops working.

[0071] An annular electromagnet piece 202 is installed on the lower side of the inner wall of the protective cover 100;

[0072] When the circuit is connected, it generates magnetism under the action of electrical energy, which can attract iron filings generated during the processing, preventing the iron filings from falling randomly inside the protective cover or splashing again due to vibration.

[0073] When the circuit is disconnected, the magnetism disappears, making it easier for staff to clean up the adsorbed iron filings.

[0074] The connecting plate 103 and the T-shaped mounting plate 104 are both hollow to accommodate wires. The battery 200, the switch button 201 and the annular electromagnet 202 are all electrically connected by wires, so that the annular electromagnet 202 can generate magnetic force.

[0075] When the annular electromagnet 202 generates magnetic force, it will move the protective cover 100 closer to the sheet-like iron-based hardware to be processed. In order to prevent the protective cover 100 from pulling on the wire and causing damage when it moves, a corrugated tube is wrapped around the outside of the wire. This can prevent damage to the wire and thus affect the normal operation of the annular electromagnet 202.

[0076] Both grooves 102 are equipped with spring-loaded components, which include:

[0077] Spring 203 is disposed between connecting plate 103 and groove 102;

[0078] The stabilizer bar 204 is located inside the groove 102, and the spring 203 and the connecting plate 103 are both sleeved on the outside of the stabilizer bar 204.

[0079] Spring 203 is in a pre-compressed state under natural conditions;

[0080] When the protective cover 100 moves downward, the spring 203 is further compressed and stores elastic potential energy.

[0081] When the external force disappears, the spring 203 releases its elastic potential energy, generating a reverse thrust to push the protective cover 100 back to its original position, thus achieving automatic rebound.

[0082] The stabilizer bar 204 restricts the movement direction of the spring 203 and the connecting plate 103, prevents the spring 203 from shifting laterally or twisting during compression or extension, and ensures that the connecting plate 103 can only move along the axial direction of the stabilizer bar, thus ensuring the stability and accuracy of the rebound process.

[0083] A locking assembly is provided between the rotating rod 105 and the extension plate 106. The locking assembly includes:

[0084] The rotating block 300 has a cavity 301 inside the extension plate 106. The rotating block 300 is rotatably disposed inside the cavity 301. The extension plate 106 has a through hole communicating with the cavity 301. One end of the rotating rod 105 passing through the through hole is fixedly connected to the rotating block 300.

[0085] The locking bolt 302 and the extension plate 106 have a threaded hole 303 on the side that communicates with the cavity 301. The locking bolt 302 and the threaded hole 303 are threadedly connected. The rotating block 300 has four evenly distributed friction surfaces on its outer side, and the end of the locking bolt 302 that extends into the cavity 301 presses against each other with the friction surfaces.

[0086] The rotating block 300 is located in the cavity 301 inside the extension plate and is fixedly connected to one end of the rotating rod 105 that passes through the through hole.

[0087] The cross-sectional area of ​​the rotating block 300 is larger than that of the rotating rod 105, and the cross-sectional area of ​​the cavity 301 is larger than the opening area of ​​the through hole. Therefore, the rotating rod 105 will not detach from the extension plate 106, and at the same time, it can drive the rotating block 300 to rotate inside the cavity 301.

[0088] The locking bolt 302 is threadedly connected to the threaded hole 303 on the side of the extension plate 106. It can move axially along the threaded hole 303 by rotation. One end of the bolt extending into the cavity 301 can press against the friction surface of the rotating block 300. The pressing force locks the rotating block 300, so that the rotating rod 105 cannot rotate, thereby indirectly controlling the rotation of the protective cover 100.

[0089] The cavity 301 is a cylindrical cavity, and the rotating block 300 is a cylindrical block. Four friction surfaces are evenly distributed on the arc-shaped side of the rotating block 300. When the locking bolt 302 extends into the cavity 301 and abuts against any of the friction surfaces, the rotating block 300 can be locked.

[0090] The four friction surfaces are evenly distributed on the outside of the rotating block 300. Each time a friction surface rotates past the threaded hole 303, the rotating rod 105, the T-shaped mounting plate 104, the connecting plate 103, the connecting block 101, and the protective cover 100 will rotate 90 degrees around the rotating rod 105 as the rotation center.

[0091] The fixed components include:

[0092] The fixing seat 400 has an internal threaded groove 401.

[0093] Threaded rod 402, threaded connection between threaded rod 402 and internal thread groove 401;

[0094] Positioning head 403 is fixedly connected to threaded rod 402;

[0095] Mounting ring 404 is fixedly mounted on the outside of threaded rod 402, and extension plate 106 is damped and sleeved on the outside of mounting ring 404.

[0096] The mounting base 400 serves as the basic carrier of the fixing components, providing an installation reference for the entire fixing structure. It is directly or indirectly connected to the hardware processing device and is the core support component for fixing the entire anti-chip splash structure onto the processing device.

[0097] The threaded rod 402 is threadedly connected to the internal thread groove 401. By rotating, it can move axially along the internal thread groove 401, thereby driving the positioning head 403 and the mounting ring 404 to move synchronously, so as to adjust the overall position of the fixed component to adapt to the installation requirements of different processing devices.

[0098] The positioning head 403 is fixedly connected to the threaded rod 402 and moves with the movement of the threaded rod 402. Its end can abut against a specific part of the hardware processing device. The tightening force of the threaded rod 402 makes the positioning head 403 press tightly against the processing device, and together with the fixed seat 400, it forms a tight fixation, which enhances the stability of the overall structure.

[0099] The mounting ring 404 is fixed to the outside of the threaded rod 402 and serves as the mounting fulcrum for the extension plate 106. The extension plate 106 is damped and sleeved on its outside. The damping allows the extension plate 106 to rotate or finely adjust its position around the mounting ring 404, but it can maintain its current position when there is no external force. This provides a certain degree of flexibility for the support assembly and ensures that it will not shake randomly during processing.

[0100] The aforementioned anti-splash structure is mainly used in devices similar to "bench drills";

[0101] The existing bench drill structure includes a base, column, spindle box, feed mechanism, worktable, chuck, drill bit, etc. These are all existing bench drill structures and will not be described in detail here.

[0102] S1. When installing a structure to prevent metal shavings from flying:

[0103] 1) Connection of the fixing component to the bench drill:

[0104] Place the fixing seat 400 against a suitable position on the upper part of the base of the bench drill (such as directly below the round hole on the worktable), rotate the threaded rod 402 to move it axially along the internal thread groove 401 of the fixing seat 400, and drive the positioning head 403 to approach the worktable of the bench drill until the positioning head 403 contacts the inner wall of the round hole on the worktable. Through the interaction force between the fixing seat 400 and the positioning head 403, the entire fixing assembly is firmly installed on the bench drill.

[0105] The workbench has a round hole, which serves as the base positioning point for the drill bit of the bench drill. The positioning head 403 is inserted into the round hole, so that the installed protective cover 100 is also on the moving path of the drill bit.

[0106] The fixing component prevents the support component from contacting the workbench, making it easier for workers to place the materials to be processed onto the workbench.

[0107] 2) Adjust the position of the support components:

[0108] Since the extension plate 106 is damped and sleeved on the outside of the mounting ring 404, the angle of the support component can be adjusted by rotating the extension plate 106 to expose the workbench surface. This makes it convenient for workers to place the clamped material directly onto the workbench for processing. At the same time, the damping characteristics between the mounting ring 404 and the extension plate 106 can ensure that the extension plate maintains its current position when there is no external force.

[0109] The extension plate 106 is located below the workbench, so that the installed rotating rod 105 is located on the outside of the workbench. This ensures that one side of the workbench is unobstructed, making it convenient for workers to place the clamped and fixed materials.

[0110] 3) Lock the protective shield angle:

[0111] Loosen the locking bolt 302, and the rotating rod 105 can be rotated, causing the protective cover 100 to rotate around the rotating block 300 on the extension plate 106. When the protective cover 100 is directly above the round hole of the worktable, the hollow part of the protective cover 100 and the drill bit path are on the same vertical axis. At this time, tighten the locking bolt 302 so that its end is in close contact with the friction surface of the rotating block 300, thereby locking the position of the rotating rod 105 and ensuring that the angle of the protective cover 100 is fixed.

[0112] The total length of the connecting plate 103 and the T-shaped mounting plate 104 is equal to the length of the extension plate 106. This ensures that the hollow part of the installed protective cover 100 and the positioning head 403 are on the same vertical axis, which facilitates the rapid positioning of the protective cover 100.

[0113] S2. When using a bench drill:

[0114] 1) Pre-treatment preparation:

[0115] The sheet-shaped iron-based hardware to be processed is fixed by a fixing fixture, and the entire fixture is placed on the worktable. The switch button 201 on the T-shaped mounting plate 104 is turned on, so that the battery 200 supplies power to the annular electromagnet 202 on the inner wall of the protective cover 100. The annular electromagnet 202 generates magnetism, which will drive the protective cover 100 to approach the sheet-shaped iron-based hardware and gradually compress the spring 203. When the protective cover 100 completely covers the processing area of ​​the sheet-shaped iron-based hardware, the processing of the sheet-shaped iron-based hardware can begin.

[0116] 2) Processing protection:

[0117] ①. The feed mechanism of the operating bench drill moves the drill bit down, and the drill bit passes through the hollow area at the top of the protective cover 100 to contact the sheet-like iron-based hardware for processing. The trumpet-shaped structure of the protective cover 100 physically blocks iron chips from splashing in all directions, and the guide arc surface further guides the iron chips to gather inside the protective cover, making them less likely to splash out.

[0118] ②. The iron filings that splash into the protective cover 100 will also be attracted by the annular electromagnet 202, preventing the iron filings from scattering randomly inside the protective cover 100 or splashing again due to vibration.

[0119] 3) Post-processing:

[0120] When switch button 201 is turned off, the magnetism of the annular electromagnet 202 disappears, and the protective cover 100 detaches from the sheet-like iron-based hardware under the action of the spring 203. At the same time, iron filings will also detach from the annular electromagnet 202 and be attracted. Workers can then clean the iron filings from the protective cover 100 and the material, completing the processing procedure.

[0121] In this embodiment, the sheet-like iron-based hardware to be processed is fixed by a clamp and placed on the worktable. After the switch button is turned on, the battery powers the annular electromagnet plate on the inner wall of the protective cover to generate magnetism, which causes the protective cover to attract and cover the processing area. When the drill bit operates through the hollow area at the top of the protective cover, the funnel-shaped structure and guide arc surface of the protective cover block and guide the iron filings to gather. At the same time, the annular electromagnet plate attracts the iron filings to prevent them from splashing.

[0122] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A structure for preventing metal shavings from splashing during hardware processing, characterized in that, It includes a protective cover (100), a support assembly, and a fixing assembly connected in sequence; The protective cover (100) is used to prevent iron filings from flying; The support assembly is used to keep the protective cover (100) suspended in the air; The fixing component is used to fix the support component and the protective cover (100) to the hardware processing device.

2. The anti-splatter structure for metal parts processing according to claim 1, characterized in that: The support components include: Two connecting blocks (101) are symmetrically fixed to the outside of the protective cover (100), and grooves (102) are provided on the same side of both connecting blocks (101). Two connecting plates (103) are respectively disposed inside the two grooves (102); T-shaped mounting plate (104), the T-shaped mounting plate (104) is fixedly connected to one end of the two connecting plates (103) away from the protective cover (100); A rotating rod (105) is fixedly connected at one end to the lower part of the T-shaped mounting plate (104); The extension plate (106) has the other end of the rotating rod (105) rotatably connected to the upper part of the extension plate (106).

3. The anti-splatter structure for metal parts processing according to claim 2, characterized in that: A battery (200) and a switch button (201) are installed on the T-shaped mounting plate (104). An annular electromagnet (202) is provided on the lower side of the inner wall of the protective cover (100). The annular electromagnet (202), the switch button (201) and the battery (200) are electrically connected in sequence.

4. The anti-splatter structure for metal parts processing according to claim 2, characterized in that: Both grooves (102) are provided with spring-back components, the spring-back components including: A spring (203) is disposed between the connecting plate (103) and the groove (102); A stabilizer bar (204) is provided inside the groove (102), and the spring (203) and the connecting plate (103) are both sleeved on the outside of the stabilizer bar (204).

5. The anti-splatter structure for metal parts processing according to claim 2, characterized in that: A locking assembly is provided between the rotating rod (105) and the extension plate (106), the locking assembly comprising: The rotating block (300) has a cavity (301) inside the extension plate (106), the rotating block (300) is rotatably disposed inside the cavity (301), the extension plate (106) has a through hole communicating with the cavity (301), and one end of the rotating rod (105) passing through the through hole is fixedly connected to the rotating block (300). The locking bolt (302) has a threaded hole (303) on the side of the extension plate (106) that communicates with the cavity (301). The locking bolt (302) is threadedly connected to the threaded hole (303). The rotating block (300) has four evenly distributed friction surfaces on its outer side. The end of the locking bolt (302) that extends into the cavity (301) presses against the friction surfaces.

6. The anti-splatter structure for metal parts processing according to claim 2, characterized in that: The fixing component includes: A fixing seat (400) is provided with an internal threaded groove (401). A threaded rod (402) is threadedly connected to the internal thread groove (401); A positioning head (403) is fixedly connected to the threaded rod (402); Mounting ring (404) is fixedly disposed on the outside of the threaded rod (402), and extension plate (106) is damped and sleeved on the outside of the mounting ring (404).

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