High sealing property clamp jaw for rare earth electrolytic furnace

Abstract

This utility model relates to a high-sealing gripper for a rare earth electrolysis furnace, comprising multiple gripping arms, each with a driving end and a clamping end, which move in opposite directions; a driving assembly located at the driving end of the gripping arm to drive the driving end; a hinge seat located inside the multiple gripping arms, with a hinge end on each gripping arm connected to the hinge seat, allowing the driving end and clamping end to rotate around the hinge end; the driving assembly includes a three-jaw chuck driven by a driving component, with the driving end of the gripping arm connected to the movable jaw of the three-jaw chuck, and the clamping end switching between a gripping position and an open position as the movable jaw moves radially along the chuck body of the three-jaw chuck; a dustproof disc is provided outside the driving assembly, with the three-jaw chuck located inside the dustproof disc and the gripping arms located outside the dustproof disc.

Description

Technical Field

[0001] This utility model relates to the field of auxiliary equipment for rare earth metal molten salt electrolysis, and in particular to a high-sealing gripper for a rare earth electrolysis furnace. Background Technology

[0002] The preparation of rare earth metals and alloys using oxide electrolysis technology has been developed in China for a long time, and the crucible method remains an important production method. The advantages of the crucible electrolysis method are: short metal tapping time, minimal impact on the normal operation of the electrolysis furnace, no need for long waiting periods for metal tapping, and simple operation. Although the technology for tapping metal from the electrolysis furnace is constantly improving, the crucible tapping method is still relatively outdated.

[0003] Traditional manual operation methods result in harsh working environments. Firstly, the high temperature of the electrolysis furnace and prolonged radiant heat can easily lead to heatstroke and skin burns for workers. Secondly, the labor intensity during the unloading process is high, and operational errors can easily cause workplace injuries, fires, and product losses. Furthermore, the harmful gases produced during electrolysis also damage the health of workers.

[0004] Chinese invention patent CN117845280A discloses a furnace unloading device for rare earth metal electrolysis, including a truss and a reciprocating wrench mounted on the truss. The wrench includes a mounting base, which comprises a base plate and a vertical plate perpendicular to the base plate. A cylinder mounting plate is provided at the upper end of the vertical plate, and a clamping cylinder is mounted on the cylinder mounting plate. The output end of the clamping cylinder passes through the cylinder mounting plate and is connected to a connecting shaft. The other end of the connecting shaft passes through the base plate and is slidably connected to the base plate. A connecting ring is sleeved on the upper end of the connecting shaft, and three connecting parts are evenly distributed on the outer side of the connecting ring. The connecting parts are hinged to a connecting rod, and the other end of the connecting rod is hinged to the upper end of a clamping arm. The base plate has clamping arm rotation fixing points evenly distributed around the connecting shaft, and the clamping arm rotation fixing points are hinged to the middle of the clamping arm. A clamping head is provided at the other end of the clamping arm. This invention provides a mechanized furnace unloading device to reduce labor intensity and minimize the harm of toxic and hazardous waste to workers.

[0005] However, in this device, the connecting parts and connecting rods used to drive the clamping arms are exposed to the outside. During the electrolysis process, the electrolytic furnace will generate electrolytic waste gas, which contains metal impurities. When these metal impurities float with the waste gas, they will enter the transmission parts at the upper end of the clamping arms, causing the transmission parts to stick to too many metal impurities and become stuck, thus making the transmission difficult and affecting the normal use of the device. Utility Model Content

[0006] In order to solve the above-mentioned problems in the prior art, this utility model provides a high-sealing gripper for rare earth electrolysis furnaces.

[0007] The above-mentioned problems of this utility model are solved by the following technical solution:

[0008] A high-sealing gripper for a rare earth electrolysis furnace, comprising,

[0009] Multiple clamping arms, each clamping arm having a driving end and a clamping end at its two ends, which move in opposite directions;

[0010] A drive assembly is located at the drive end of the clamping arm and drives the drive end.

[0011] A hinge seat is provided on the inner side of the plurality of clamping arms, and the clamping arms are provided with hinge ends connected to the hinge seat so that the driving end and the clamping end can rotate around the hinge ends.

[0012] The drive assembly includes a three-jaw chuck driven by a drive member. The drive end of the clamping arm is connected to the movable jaw of the three-jaw chuck, and as the movable jaw moves radially along the chuck body of the three-jaw chuck, the clamping end switches between a gripping position and an opening position.

[0013] A dustproof disc is provided on the outside of the drive assembly, the three-jaw chuck is located inside the dustproof disc, and the clamping arm is located outside the dustproof disc.

[0014] A further provision of the above technical solution is as follows: a transmission rod is radially movably arranged inside the dustproof disc, one end of the transmission rod is limited and connected to the movable chuck, and the other end extends out to the outside of the dustproof disc and is hinged to the drive end of the clamping arm.

[0015] A further provision of the above technical solution is that: the inner end of the transmission rod is provided with a connecting groove facing the movable pawl, and the pawl part of the movable pawl extends into the connecting groove.

[0016] A further provision of the above technical solution is that a guide seat is provided inside the dustproof tray, and the transmission rod is slidably disposed in the guide groove of the guide seat;

[0017] The guide groove is provided with a sliding groove that can accommodate the movable claw to extend into and slide along the axial direction.

[0018] By adopting the above technical solution, the transmission rod slides through the guide groove of the guide seat and is limited by the connecting groove of the claw of the movable pawl, ensuring the stability of the transmission rod moving radially.

[0019] A further provision of the above technical solution is that the dustproof disc is provided with a clearance hole that can accommodate the extension of the transmission rod, and a sealing ring is provided in the clearance hole to seal the hole wall and the transmission rod.

[0020] A further provision of the above technical solution is that: the interior of the clearance hole is provided with an abutment part, and a sealing cover is installed on the outside, the sealing cover limiting the sealing ring within the clearance hole.

[0021] A further provision of the above technical solution is that: an adjustment hole is provided at the end of the transmission rod in the radial direction, and the driving end of the clamping arm is provided in the adjustment hole through a short shaft.

[0022] By adopting the above technical solution, the moving rod and the clamping arm drive end are hinged through the adjustment hole, which makes the reverse movement of the clamping arm drive end and the clamping end more coordinated and the clamping action more accurate.

[0023] A further provision of the above technical solution is that: a fixing rod extends from the lower end of the dustproof tray, the hinge seat is disposed on the fixing rod, and a hinge clamp extends outward.

[0024] A further provision of the above technical solution is that the dustproof tray is also provided with a wrench, which extends into the dustproof tray and connects to the three-jaw chuck for manually driving the three-jaw chuck.

[0025] By adopting the above technical solution, a wrench is installed on the dustproof tray, which can manually drive the three-jaw chuck when the drive component fails, avoiding production interruption caused by power failure and ensuring the emergency operation capability of the equipment.

[0026] A further configuration of the above technical solution is as follows: the clamping arm includes a detachably mounted section and a movable section, the clamping end is located at the lower end of the movable section, and the driving end is located at the upper end of the mounted section;

[0027] The mounting section and the movable section are connected by a locking block and a locking slot.

[0028] The hinged end is located at the lower part of the mounting section.

[0029] By adopting the above technical solution, the clamping arm is detachably connected by the mounting section and the movable section through the cooperation of the locking block and the locking slot. Only the movable section needs to be replaced to adapt to molybdenum pots of different sizes or shapes, which reduces the equipment maintenance and modification costs and improves the flexibility of the device.

[0030] Compared with the prior art, the beneficial effects of this utility model are as follows: a dustproof disc is set on the outside of the drive assembly, and the clearance hole between the transmission rod and the dustproof disc is double-sealed by a sealing ring and a sealing cover, effectively preventing the waste gas containing metal impurities generated by the electrolytic furnace from entering the transmission component. This avoids the transmission jamming problem caused by the accumulation of metal impurities in traditional devices and significantly improves the long-term operational reliability of the gripper. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model.

[0032] Figure 2 This is an exploded structural diagram of the present invention.

[0033] Figure 3 This is a schematic diagram of the exploded structure of the driving component.

[0034] Figure 4 for Figure 3 Enlarged structural diagram of part A in the middle.

[0035] Figure 5 This is a schematic diagram showing the position and structure of the guide seat and guide rod within the dustproof tray.

[0036] Figure 6 This is a cross-sectional structural diagram of the dustproof tray.

[0037] The attached diagram is labeled as follows: 100, clamping arm; 101, drive end; 102, clamping end; 103, hinge end; 110, mounting section; 120, movable section; 121, locking block.

[0038] 200. Three-jaw chuck; 210. Movable jaw; 211. Jaw section;

[0039] 300. Dustproof tray; 301. Clearance hole; 301.1. Abutment part;

[0040] 400. Hinge base; 410. Hinge clamp;

[0041] 500, transmission rod; 501, connecting groove; 502, adjusting hole;

[0042] 600. Transmission assembly; 610. Drive pulley; 620. Driven pulley; 630. Transmission belt;

[0043] 700, guide seat; 701, guide groove; 701.1, sliding groove;

[0044] 1. Wrench; 2. Molybdenum pot; 3. Transmission box; 4. Drive rod; 5. Bushing; 6. Sealing ring; 7. Sealing cover; 7.1. Pressure ring; 8. Drive component. Detailed Implementation

[0045] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0046] like Figure 1-6 As shown in the figure, this embodiment discloses a high-sealing gripper for a rare earth electrolysis furnace.

[0047] A high-sealing gripper for a rare earth electrolysis furnace, comprising,

[0048] Multiple clamping arms 100, each clamping arm 100 having a driving end 101 and a clamping end 102 at its two ends, and the driving end 101 and the clamping end 102 moving in opposite directions;

[0049] A drive assembly is provided at the drive end 101 of the clamping arm 100 to drive the drive end 101.

[0050] A hinge base 400 is provided inside the plurality of clamping arms 100. The clamping arms 100 are provided with a hinge end 103 connected to the hinge base 400, so that the driving end 101 and the clamping end 102 rotate around the hinge end 103.

[0051] The drive assembly includes a three-jaw chuck 200 driven by a drive member 8. The drive end 101 of the clamping arm 100 is connected to the movable jaw 210 of the three-jaw chuck 200. As the movable jaw 210 moves radially along the chuck body of the three-jaw chuck 200, the clamping end 102 switches between a gripping position and an open position.

[0052] A dustproof disc 300 is provided on the outside of the drive assembly, the three-jaw chuck 200 is located inside the dustproof disc 300, and the clamping arm 100 is located outside the dustproof disc 300.

[0053] Specific reference Figure 1 and Figure 2 As shown, the driving component 8 is located outside the dustproof tray 300 and drives the three-jaw chuck 200 inside the dustproof tray 300. Under the action of the driving component 8, the three-jaw chuck 200 drives the movable jaw 210 to move radially along the chuck body of the three-jaw chuck 200. The movable jaw 210 drives the driving end 101 of the clamping arm 100 to move synchronously. Since the hinge seat 400 connects the hinge end 103 of the clamping arm 100, the driving end 101 and the clamping end 102 of the clamping arm 100 form a seesaw state. That is, when the driving end 101 moves outward under the action of the movable jaw 210, the clamping end 102 moves inward. That is, multiple clamping ends 102 form a close-up shape, thereby clamping the molybdenum pot 2 in the electrolytic cell.

[0054] When the drive end 101 moves inward under the action of the movable jaw 210, the clamping end 102 moves outward synchronously, and the multiple clamping ends 102 form an outward opening shape.

[0055] In this embodiment, the driving component 8 is a cylinder or a hydraulic cylinder.

[0056] In this embodiment, a dustproof disc 300 is provided on the outside of the three-jaw chuck 200. The dustproof disc 300 is used as a carrier for the transmission component, and only the drive component 8 and the chuck arm are located outside the dustproof disc 300.

[0057] Based on the above settings, the exhaust gas generated by the electrolytic furnace cannot enter the dustproof disc 300, ensuring the cleanliness of the inside of the dustproof disc 300 and preventing metal impurities from accumulating at the transmission position and causing the transmission to jam.

[0058] In this embodiment, the three-jaw chuck 200 is a three-jaw chuck structure commonly used in machining equipment in the prior art. For example, the Chinese utility model patent with authorization announcement number CN222222079U discloses a surface treatment device for spherical castings, which discloses a three-jaw chuck 200 structure. The jaws are adjusted in the radial direction by the adjustment mechanism so that the three jaws are in a clamping state or an open state.

[0059] In this embodiment, when the three movable claws 210 are in the open state, that is, the driving end 101 of the clamping arm 100 is pushed outward, the clamping end 102 is located at the innermost position, and the three clamping arms 100 are in the gripping position.

[0060] When the three movable jaws 210 are in the gripping state, the drive end 101 of the gripping arm 100 is located at the innermost side. At this time, the gripping end 102 is open, and the three gripping arms 100 are in the open position.

[0061] Specifically, since the moving distance of the movable claw 210 is limited, in order to connect the clamping arm 100, in this embodiment, a transmission rod 500 is radially movably arranged inside the dustproof disc 300. One end of the transmission rod 500 is limited to the movable claw 210, and the other end extends to the outside of the dustproof disc 300 and is hinged to the driving end 101 of the clamping arm 100.

[0062] Specific reference Figure 3 As shown, the transmission rod 500 is inserted radially into the dustproof disc 300 and connected to the movable jaw 210 of the three-jaw chuck 200 inside the dustproof disc 300. The movement of the movable jaw 210 drives it to move axially, extending or retracting relative to the dustproof disc 300.

[0063] A transmission box 3 is provided on the dustproof disc 300, and a transmission assembly 600 is provided inside the transmission box 3. The transmission assembly 600 is a pulley assembly, including a drive pulley 610 connected to the output shaft of the drive component, a driven pulley 620 connected to the three-jaw chuck 200, and a transmission belt 630 connected to the drive pulley 610 and the driven pulley 620. At the same time, a drive rod 4 is provided on the driven pulley 620, which extends into the three-jaw chuck 200 to drive the three-jaw chuck 200.

[0064] Specifically, the inner end of the transmission rod 500 is provided with a connecting groove 501 facing the movable pawl 210, and the claw portion 211 of the movable pawl 210 extends into the connecting groove 501. See details. Figure 4As shown, the connecting groove 501 is provided on the inner side of the transmission rod 500, and the connecting groove 501 extends radially through the rod. It has two limiting surfaces in the axial direction, and its width in the axial direction is consistent with the claw portion 211 of the movable claw 210. The connecting groove 501 constrains the movement of the movable claw 210 along the axial direction of the transmission rod 500, so that when the movable claw 210 moves radially along the three-jaw chuck 200, it drives the transmission rod 500, thereby driving the drive end 101 of the clamping arm 100 to move closer to the dustproof disc 300 and further away from the dustproof disc 300.

[0065] In order to ensure the stable movement of the transmission rod 500, in this embodiment, a guide seat 700 is also provided inside the dustproof disc 300, and the transmission rod 500 is slidably disposed in the guide groove 701 of the guide seat 700;

[0066] The guide groove 701 is provided with a sliding groove 701.1 that can accommodate the movable claw 210 to extend into and slide along the axial direction.

[0067] In this embodiment, the dustproof disc 300 is also provided with a wrench 1, which extends into the dustproof disc 300 and is connected to the three-jaw chuck 200 for manual driving of the three-jaw chuck 200.

[0068] When the drive component 8 fails, the three-jaw chuck 200 can be driven by manually operating the wrench 1.

[0069] The connection method between the wrench 1 and the three-jaw chuck 200 is the same as the connection method between the drive rod 4 and the three-jaw chuck 200, and will not be described in detail here.

[0070] To avoid interference between the manual operation components and the drive unit 8 when driving the three-jaw chuck 200, the wrench 1 can be removed or disengaged from the transmission components of the three-jaw chuck 200 when driving the three-jaw chuck 200 via the drive unit 8.

[0071] Specific reference Figure 4 and Figure 5 As shown, the guide seat 700 is fixed inside the dustproof disc 300 and extends from below the movable jaw 210 of the three-jaw chuck 200 to the side of the dustproof disc 300; the guide groove 701 is axially disposed on the guide seat 700, consistent with the moving direction of the transmission rod 500, and has at least an outer end opening, so that the outer end of the transmission rod 500 extends out from the opening.

[0072] In this embodiment, in order to ensure the coaxiality of the transmission rod 500 and the guide groove 701, a bushing 5 is provided in the guide groove 701 to avoid wear between the transmission rod 500 and the guide groove 701, and to reduce noise generated during sliding.

[0073] In this embodiment, the dustproof disc 300 is provided with a clearance hole 301 that can accommodate the extension of the transmission rod 500. A sealing ring 6 is provided in the clearance hole 301 to seal the hole wall and the transmission rod 500.

[0074] The outer diameter of the sealing ring 6 is the same as or slightly larger than the clearance hole 301, thus forming a zero-clearance fit with the inner wall of the clearance hole 301; the inner diameter of the sealing ring 6 is the same as or slightly smaller than the diameter of the transmission rod 500, thus forming a zero-clearance fit with the transmission rod 500.

[0075] Based on the above configuration, the sealing ring 6 seals the transmission rod 500 and the clearance hole 301, thereby ensuring the dustproof function of the dustproof disc 300.

[0076] To prevent the sealing ring 6 from moving inside or outside the dustproof disc 300 during transmission, causing sealing failure, in this embodiment,

[0077] The clearance hole 301 has an abutment part 301.1 inside and a sealing cover 7 installed on the outside. The sealing cover 7 limits the sealing ring 6 inside the clearance hole 301.

[0078] Specific reference Figure 4 and Figure 6 As shown, the clearance hole 301 is configured as a horizontal stepped hole, with the inner diameter being smaller than the outer diameter, so that an abutment portion 301.1 is formed in the middle of the clearance hole 301, and the inner side of the sealing ring 6 abuts against the abutment portion 301.1.

[0079] Meanwhile, a clamping ring 7.1 is provided on the side of the sealing cover 7 facing the dustproof tray 300, and the clamping ring 7.1 can be inserted into the clearance hole 301 to clamp the sealing ring 6.

[0080] Furthermore, the sealing cover 7 is provided with a through hole that can accommodate the extension of the transmission rod 500, and the diameter of the through hole is larger than the diameter of the transmission rod 500.

[0081] The specific implementation of the connection between the transmission rod 500 and the clamping arm 100 in this embodiment is as follows: the end of the transmission rod 500 is provided with an adjustment hole 502 in the radial direction, and the driving end 101 of the clamping arm 100 is provided in the adjustment hole 502 through a short shaft.

[0082] Reference Figure 1 and Figure 2 As shown, due to the action of the adjusting hole 502 and the short shaft, when the transmission rod 500 moves radially along the dustproof disc 300, it drives the drive end 101 to generate displacement in the horizontal direction. Since the hinge end 103 in the middle of the clamping arm 100 is fixed in the horizontal direction, the drive end 101 rotates relative to the transmission rod 500 to ensure the consistency of the clamping arm 100.

[0083] In this embodiment, the lower end of the dustproof tray 300 is provided with a fixing rod, the hinge seat 400 is provided on the fixing rod, and a hinge clamp 410 extends outward.

[0084] The number of hinged clips 410 is the same as the number of clamping arms 100, extending to the outside of the clamping arms 100, and connected to the hinged ends 103 on the clamping arms 100 via hinged rods.

[0085] In this embodiment, the clamping arm 100 is configured as a replaceable structure. Specifically, the clamping arm 100 includes a detachable mounting section 110 and a movable section 120. The clamping end 102 is located at the lower end of the movable section 120, and the driving end 101 is located at the upper end of the mounting section 110.

[0086] The mounting section 110 and the movable section 120 are connected by a locking block 121 and a locking slot.

[0087] The hinge end 103 is located at the lower part of the mounting section 110.

[0088] Specific reference Figure 1 and Figure 2 As shown, the lower end of the mounting section 110 is provided with a slot, and the upper end of the movable section 120 is provided with a card block 121 that can be connected with the slot. The card block 121 is embedded into the slot, so that the mounting section 110 and the movable section 120 are connected vertically to form a complete integrated structure.

[0089] The locking block 121 and the locking slot constrain the movement of the movable section 120 and the mounting section 110 along the length of the locking arm.

[0090] When it is necessary to adapt to different molybdenum pots 2, the movable section 120 can be replaced so that the clamping arm 100 has a clamping end 102 that cooperates with the molybdenum pot 2.

[0091] Preferably, in this embodiment, in order to reduce the operation during replacement, the hinge end 103 is set in the section of the mounting section 110.

[0092] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-sealing clamping jaw for a rare earth electrolytic furnace, comprising, a plurality of clamping arms (100), two ends of the clamping arms (100) are driving end (101) and clamping end (102) respectively, and the driving end (101) and the clamping end (102) move reversely; a driving assembly provided at the driving end (101) of the clamping arm (100) to drive the driving end (101); a hinged seat (400) provided inside the plurality of clamping arms (100), a hinged end (103) is provided on the clamping arm (100) and connected to the hinged seat (400), so that the driving end (101) and the clamping end (102) rotate around the hinged end (103); characterized in that the driving assembly comprises a three-jaw chuck (200) driven by a driving member (8), the driving end (101) of the clamping arm (100) is connected to the movable jaw (210) of the three-jaw chuck (200), and moves along the radial direction of the chuck body of the three-jaw chuck (200) with the movable jaw (210), so as to switch the clamping end (102) between the grabbing position and the open position; a dustproof disc (300) is provided outside the driving assembly, the three-jaw chuck (200) is arranged in the dustproof disc (300), and the clamping arm (100) is located outside the dustproof disc (300).

2. The high sealing property gripper for a rare earth electrolytic cell according to claim 1, characterized by: a transmission rod (500) is radially movably arranged in the dustproof disc (300), one end of the transmission rod (500) is limitingly connected to the movable jaw (210), and the other end extends out of the dustproof disc (300) and is hinged to the driving end (101) of the clamping arm (100).

3. The high sealing property gripper for a rare earth electrolytic cell according to claim 2, characterized in that: The inner end of the transmission rod (500) is provided with a connecting groove (501) on the side facing the movable jaw (210), and the jaw part (211) of the movable jaw (210) extends into the connecting groove (501).

4. The high sealing property gripper for a rare earth electrolytic cell according to claim 2, characterized by: A guide seat (700) is further arranged in the dustproof disc (300), and the transmission rod (500) is slidingly arranged in the guide groove (701) of the guide seat (700). A sliding groove (701.1) capable of accommodating the movable jaw (210) extending in and sliding along the axial direction is formed in the guide groove (701).

5. The high sealing property gripper for a rare earth electrolytic cell according to claim 4, characterized in that: An avoiding hole (301) capable of accommodating the transmission rod (500) extending out is arranged on the dustproof disc (300), and a sealing ring (6) is arranged in the avoiding hole (301) to form a seal between the hole wall and the transmission rod (500).

6. The high sealing property gripper for a rare earth electrolytic cell according to claim 5, characterized in that: An abutting part (301.1) is arranged in the avoiding hole (301), and a sealing cover (7) is arranged on the outside, and the sealing cover (7) limits the sealing ring (6) in the avoiding hole (301).

7. The high sealing property gripper for a rare earth electrolytic cell according to claim 2, characterized in that: An adjusting hole (502) is radially arranged at the end of the transmission rod (500), and the driving end (101) of the clamping arm (100) is arranged in the adjusting hole (502) through a short shaft.

8. The high sealing property gripper for a rare earth electrolytic cell according to claim 1, characterized by: A fixed rod is arranged at the lower end of the dustproof disc (300), the hinged seat (400) is arranged on the fixed rod, and a hinged clamp (410) is arranged outwardly.

9. The high sealing property gripper for a rare earth electrolytic cell according to claim 1, characterized by: The dustproof disc (300) is further provided with a wrench (1) which extends into the dustproof disc (300) and is connected with the three-jaw chuck (200) for manually driving the three-jaw chuck (200).

10. The high sealing property gripper for a rare earth electrolytic cell according to claim 1, characterized by: The clamping arm (100) comprises a detachable mounting segment (110) and a movable segment (120), the clamping end (102) is located at the lower end of the movable segment (120), and the driving end (101) is located at the upper end of the mounting segment (110). The mounting segment (110) and the movable segment (120) are connected through the cooperation of the clamping block (121) and the clamping groove. The hinged end (103) is located at the lower part of the mounting segment (110).

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