Anti-overloading lithium battery energy storage device

Abstract

The invention provides an anti-overload lithium battery energy storage device which structurally comprises a through groove, an insulating base, an adsorption frame, a dustproof frame body and an anti-overload monitor, the through groove and the insulating base are integrated, the adsorption frame covers the edge position of the insulating base, the dustproof frame body is arranged at the upper end of the insulating base, and the anti-overload monitor is carried on the top of the dustproof frame body; according to the invention, on the basis that the anti-overload monitor is carried on the top of the dustproof frame body, the conductive shaft and the power-on insertion block at the bottom of the current overload protector can be electrically connected with the energy storage shop on the insulating base in a penetrating manner, so that original circuit connection can be replaced, and the overall power-on stability is improved; therefore, the current overload protector can continuously monitor the intensity of the current guided by the conductive shaft in real time, if the current exceeds the rated value of the equipment, the short circuit is automatically cut off, the effect of protecting the circuit and the equipment from being damaged is achieved, the power-on safety coefficient of the energy storage device and the equipment is improved, and the anti-overload effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery energy storage devices, and more particularly to an overload-proof lithium battery energy storage device. Background Art

[0002] A lithium battery is a battery containing lithium (including metallic lithium, lithium alloys, lithium ions, and lithium polymers) in an electrochemical system. It can be divided into two categories: lithium metal batteries and lithium ion batteries. The common difference between the two is whether they are non-rechargeable or rechargeable. Therefore, a lithium battery energy storage device refers to a device that absorbs, stores, and releases energy in the form of electricity. It is usually composed of battery modules, electrical systems, and control systems. Its main functions include improving energy utilization efficiency, enhancing power reliability, environmental protection and energy conservation, and responding to emergencies. In summary, the inventors have discovered that existing lithium battery energy storage devices have the following main defects: due to the relatively simple structure of the current lithium battery energy storage device during normal use, it is impossible to monitor the current when discharging to external equipment, which easily leads to overload caused by uncontrolled current release, thereby reducing the stability of the current lithium battery energy storage device. Summary of the Invention

[0003] The technical solution adopted by the present invention to achieve the technical purpose is: an overload-proof lithium battery energy storage device, whose structure includes: a through-groove, an insulating base, an adsorption frame, a dust-proof frame, and an overload protection monitor. The through-groove is integrated with the insulating base and the adsorption frame covers the edge of the insulating base. The dust-proof frame is arranged at the upper end of the insulating base and the overload protection monitor is mounted on the top.

[0004] As a further improvement of the present invention, the anti-overload monitor is provided with a vertical pull block, which is welded to the left and right sides of the current overload protector and the top of the current overload protector is connected to an electric energy output shaft. A conductive shaft is also provided at the lower end of the current overload protector, and a power plug is connected to the bottom of the conductive shaft.

[0005] As a further improvement of the present invention, a welding groove is further provided in the top area of the current overload protector, and the welding groove is opened on the left and right sides of the top cover. A fixed plug is connected to the lower corner area of the top cover, and a constant temperature module is also provided in the lower edge area of the top cover. Insulating clamping rings are fixed on the left and right sides of the constant temperature module to overlap and clamp the edge of the power output shaft.

[0006] As a further improvement of the present invention, the overload monitor is installed on the top of the dustproof frame to complete the electrical connection with the energy storage battery inside the insulating base in an interlaced manner, and then the overload monitor guides the electric energy through the power plug and the conductive shaft. When the electric energy is output, it is continuously monitored in real time by the current overload protector. At the same time, the constant temperature module on the inner side of the top cover of the current overload protector is connected to the inner side of the dustproof frame according to the covering position of the top cover, and then the insulating clamp ring is overlapped and fixed to the bottom edge of the electric energy output shaft.

[0007] As a further improvement of the present invention, the through grooves are distributed in the edge area of the insulating base and a group of adsorption frames are provided on both sides of the insulating base and the upper layer is perpendicular to the dustproof frame. The overload monitor is located at the upper center of the dustproof frame.

[0008] As a further improvement of the present invention, the vertical pull blocks are made of plastic and are located on the left and right sides of the current overload protector. The power output module is set in a vertical orientation. The number of conductive axes is consistent with the number of power output axes and is on the same vertical line. The power plug is a solid circular shape.

[0009] As a further improvement of the present invention, the welding groove is a square concave shape and is provided on each of the left and right sides of the top cover. There are four fixed plug-ins at the lower corners of the top cover, and the constant temperature module and the insulating clamp ring are matched with each other in spacing.

[0010] As a further improvement of the present invention, the surface of the insulating base is also provided with a parallel plate, and partition fixings are connected on both sides of the center of the surface of the parallel plate. The connecting plate is fixed in the distance between the two groups of partition fixings. An energy storage battery is provided in the center of the connecting plate, and splicing blocks are connected on both sides of the edge of the energy storage battery. The splicing blocks are fixedly connected to one end of the support column through the splicing blocks. The support column is embedded in the center of the surface of the connecting plate, and the center of the energy storage battery is fixed to the power plug of the overload monitor.

[0011] As a further improvement of the present invention, three through grooves are opened on both sides of the edge of the parallel plate, and there is a distance between the partition fixing piece and the through groove and it is connected with the lower end of the dustproof frame. The connecting plate and the support column are parallel to each other and position the energy storage battery.

[0012] As a further improvement of the present invention, the partition fixing member is also provided with a fixing ring, which is embedded in the surface of the contact plate. The contact plate overlaps with the upper part of the solid plate and the lower end of the solid plate is also connected to a solid column, and a magnetic block is spliced at the lower end of the solid column.

[0013] As a further improvement of the present invention, the fixing ring is circular in shape and has a slot inside. The contact plate and the solid plate are parallel to each other, and multiple solid columns and magnetic blocks at the lower end of the solid plate are vertically inserted into the parallel plates for adsorption and fixed connection. There is a distance between the distribution positions of the solid columns and the magnetic blocks and the through slots.

[0014] As a further improvement of the present invention, the dustproof frame is further provided with a groove, which is opened at the corner of the frame, and a loading groove is provided on the inner side of the frame, through which the protrusion is installed in the inner wall of the frame.

[0015] As a further improvement of the present invention, the size of the groove matches the size of the fixing block of the top cover and the frame can be assembled by vertically embedding the internal protrusion into the fixing ring of the partition fixing piece of the insulating base.

[0016] As a further improvement of the present invention, the protrusion is further provided with a locking bolt, which passes through the center of the block and is connected to a magnetic suction cup at the bottom of the block.

[0017] As a further improvement of the present invention, the block is vertically installed in the inner wall of the frame through a magnetic suction cup and is assembled through a locking bolt, and the length of the locking bolt is greater than the length of the block and the magnetic suction cup combined.

[0018] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention is based on an overload monitor mounted on the top of a dustproof frame. The conductive shaft and power plug at the bottom of the current overload protector can be electrically connected to the energy storage device on the insulating base, thereby replacing the original line connection and improving the overall power-on stability. The current overload protector can continuously monitor the current intensity guided by the conductive shaft in real time. If the current exceeds the rated value of the equipment, it will automatically disconnect the short circuit, thereby protecting the circuit and equipment from damage, improving the power-on safety factor of the energy storage device and equipment, and forming an overload protection effect.

[0019] 2. The present invention is further improved by the insulating base. The energy storage battery can be vertically fixed by the separation fixing member on the parallel plate. After the energy storage battery is vertically fixed, the vertical connection accuracy with the current overload protector can be improved. Then, the fixing ring on the contact plate of the separation fixing member can be inserted and connected with the protrusion at the bottom of the dustproof frame, thereby effectively improving the convenience of vertical disassembly and assembly of the entire component.

[0020] 3. The present invention is further improved by the dustproof frame. The grooves at the four corners of the top of the frame can be inserted and connected with the fixed plugs at the corners of the lower layer of the top cover, thereby effectively improving the disassembly of the top of the current overload protector, so that it can improve the convenience of repairing and reconnecting related components after automatic power failure due to overload. Furthermore, the protrusions on the inner wall of the frame can be embedded in the fixing ring on the inner wall of the partition fixing part through the raised state of the block, achieving the effect of vertical loading. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The present invention is a structural diagram of an overload-proof lithium battery energy storage device.

[0022] Figure 2 The present invention is a schematic diagram of the improved three-dimensional structure of an anti-overload monitor.

[0023] Figure 3 The present invention is a schematic diagram of the three-dimensional structure of the improved top of a current overload protector.

[0024] Figure 4 The present invention is a schematic diagram of the structure of an improved insulating base when viewed from above.

[0025] Figure 5 The present invention is a schematic diagram of the cross-sectional structure of an improved partition fixing member.

[0026] Figure 6 The present invention is a schematic diagram of the structure of an improved dustproof frame, viewed from the bottom.

[0027] Figure 7 The present invention is a schematic diagram of the three-dimensional structure of an improved bump.

[0028] In the figure: through slot 1, insulating base 2, adsorption frame 3, dustproof frame 4, overload monitor 5; Vertical pull block-51, current overload protector-52, power output shaft-53, conductive shaft-54, power plug-in block-55; Welding groove 521, top cover 522, fixing plug 523, constant temperature module 524, insulating clamp ring 525; Parallel plate 21, partition fixing piece 22, connecting plate 23, energy storage battery 24, splicing block 25, support column 26; Fixed ring 221, contact plate 222, solid plate 223, solid column 224, magnetic block 225; Groove-41, frame-42, loading slot-43, protrusion-44; Locking bolt-441, block-442, magnetic suction cup-443. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings: Example

[0030] Figures 1 to 5 As shown: The present invention provides an overload-proof lithium battery energy storage device. Its structure includes a through slot 1, an insulating base 2, an adsorption frame 3, a dustproof frame 4, and an anti-overload monitor 5. The through slot 1 and the insulating base 2 are integrated and the adsorption frame 3 covers the edge of the insulating base 2. The dustproof frame 4 is arranged at the upper end of the insulating base 2 and the anti-overload monitor 5 is mounted on the top.

[0031] Among them, the anti-overload monitor 5 is provided with a vertical pull block 51, which is welded to the left and right sides of the current overload protector 52 and the top of the current overload protector 52 is connected to the power output shaft 53. The lower end of the current overload protector 52 is also provided with a conductive shaft 54, and the bottom of the conductive shaft 54 is connected to a power plug 55.

[0032] Among them, the top area of the current overload protector 52 is also provided with a welding groove 521, and the welding groove 521 is opened on the left and right sides of the top cover 522. The lower corner area of the top cover 522 is connected with a fixed plug 523, and the lower edge area of the top cover 522 is also provided with a constant temperature module 524. Insulating clamping rings 525 are fixed on the left and right sides of the constant temperature module 524 to overlap and clamp the edge of the power output shaft 53.

[0033] Among them, the overload protection monitor 5 is installed on the top of the dustproof frame 4 to complete the electrical connection with the energy storage battery inside the insulating base 2 in an interlaced manner, and then the overload protection monitor 5 guides the electric energy through the power plug 55 and the conductive shaft 54, and is continuously monitored in real time by the current overload protector 52 when the electric energy is output. At the same time, the constant temperature module 524 on the inner side of the top cover 522 of the current overload protector 52 is connected to the inner side of the dustproof frame 4 according to the covering position of the top cover 522, and then the insulating clamp ring 525 is overlapped and fixed with the bottom edge of the electric energy output shaft 53.

[0034] Among them, the through groove 1 is distributed in the edge area of the insulating base 2 and a group of adsorption frames 3 are provided on the left and right sides of the insulating base 2, and the upper layer is perpendicular to the dustproof frame 4, and the overload monitor 5 is located at the upper end center of the dustproof frame 4.

[0035] Among them, the vertical pull block 51 is made of plastic and is located on the left and right sides of the current overload protector 52. The power output module 53 is set in a vertical orientation. The number of conductive shafts 54 is consistent with the number of power output shafts 53 and is on the same vertical line. The power plug 55 is a solid circular shape.

[0036] The welding groove 521 is a square concave shape and is provided on each of the left and right sides of the top cover 522 . Four fixing plugs 523 are provided at the lower corners of the top cover 522 . The constant temperature module 524 and the insulating clamp ring 525 are spaced in accordance with each other.

[0037] Among them, the surface of the insulating base 2 is also provided with a parallel plate 21, and the two sides of the center of the surface of the parallel plate 21 are connected with partition fixings 22. The connecting plate 23 is fixed in the distance between the two groups of partition fixings 22. A storage battery 24 is provided in the center of the connecting plate 23, and splicing blocks 25 are connected on both sides of the edge of the energy storage battery 24. The splicing blocks 25 are fixedly connected to one end of the support column 26 through the splicing blocks 26. The support column 26 is embedded in the center of the surface of the connecting plate 23, and the center of the energy storage battery 24 is fixed with the power plug 55 of the anti-overload monitor 5.

[0038] Among them, three through grooves 1 are opened on both sides of the edge of the parallel plate 21, and there is a gap between the partition fixing piece 22 and the through groove 1, and it is connected with the lower end of the dustproof frame 4. The connecting plate 23 and the support column 26 are parallel to each other and position the energy storage battery 24.

[0039] Among them, the partition fixing member 22 is also provided with a fixing ring 221, and the fixing ring 221 is embedded in the surface of the contact plate 222. The contact plate 222 overlaps the upper part of the solid plate 223 and the lower end of the solid plate 223 is also connected to a solid column 224, and a magnetic block 225 is spliced at the lower end of the solid column 224.

[0040] Among them, the fixing ring 221 is circular in shape and has a slot inside. The contact plate 222 and the solid plate 223 are parallel to each other, and the multiple solid columns 224 and the magnetic block 225 at the lower end of the solid plate 223 are vertically inserted into the parallel plate 21 for adsorption and fixed connection. There is a distance between the distribution position of the solid column 224 and the magnetic block 225 and the through slot 1.

[0041] Specific functions and operation procedures of this embodiment: In the present invention, the overload-proof lithium battery energy storage device can vertically install the entire component at the use origin through the insulating base 2 and the through slot 1, and then the adsorption frame 3 on the edge of the insulating base 2 can improve the stability of the origin positioning by adsorption, and then the upper dustproof frame 4 can cover the energy storage battery 24, so that it can be stably installed at the origin and electrically connected to the top anti-overload monitor 5, thereby avoiding damage to related equipment and circuits caused by overload problems when powered on. Then the anti-overload monitor 5 can remove or embed the current overload protector 52 vertically from the top of the dustproof frame 4 according to the vertical pull block 51, and then the current overload protector 52 can use the upper power output shaft 53 to pull the conductive shaft 54 and the power plug 55 to the energy storage battery 2 4 is guided to the relevant equipment area. During the process, the conductive shaft 54 can complete the interlaced electrical connection with the energy storage battery 24 through the power plug block 55. The current data guided during conduction will be monitored by the current overload protector 52, so that the current overload protector 52 can compare the guided current rating according to its own current protection data. If an abnormality occurs, the power-off program will be automatically triggered, so that the circuit can be automatically disconnected to protect the circuit and equipment from damage. Therefore, the safety factor of the overall device can be improved and the overload protection feature can be achieved. After the power is cut off, the operator can complete the fixed connection with the vertical pull block 51 through the welding grooves 521 on the left and right sides of the top cover 522 of the current overload protector 52, so the vertical After the straight pull block 51 is pulled upward, it can force the power plug block 55 to separate from the top connection area of the energy storage battery 24. Therefore, the original line connection is replaced by the interlacing method, which is difficult to disassemble, and then the fixed plug block 523 at the lower corner of the top cover 522 can be separated from the top corner area of the dustproof frame 4, and then the central insulating clamping block 525 is separated from the edge of the power output shaft 53 at the same time. Therefore, after the top cover 522 is separated from the upper end of the current overload protector 52, the internal power components of the current overload protector 52 can be inspected and the disconnected circuit can be manually connected again. After the overload cause of the entire circuit and equipment is resolved, the top cover 522 covers the top of the current overload protector 52 again, achieving the effect of covering and energizing it again, thereby improving the automatic disconnection. The convenience of post-electric processing, at the same time, during operation, the inner constant temperature module 524 can balance the temperature inside the dustproof frame 4 and the current overload protector 52 according to its own constant temperature effect, avoiding the difficulty of dissipating the internal temperature caused by the covering operation, thereby improving the stability of the energy storage device. The parallel plate 21 of the insulating base 2 can fix the connecting plate 23 in parallel through the separating fixing piece 22, and then the connecting plate 23 uses the supporting column 26 and the splicing block 25 it carries to determine the position of the energy storage battery 24, so that the energy storage battery 24 can be installed and used in a vertical position and then electrically connected with the power plug 55. Finally, the solid plate 223 of the separating fixing piece 22 can install the fixing ring 221 through the contact plate 222.The circular shape of the fixing ring 221 allows it to intersperse and connect parallel to the bottom of the dustproof frame 4 to prevent tilting. After the dustproof frame 4 is disassembled, the contact plate 222 can be manually disengaged from the inner side of the parallel plate 21 through the solid column 224 at the lower end of the solid plate 223 and the magnetic block 225. Therefore, the overall fixed connection through interspersed adsorption can facilitate subsequent disassembly and maintenance of the single group of components. Example

[0042] Figures 6 and 7 As shown: The present invention provides an overload-proof lithium battery energy storage device. Its structure includes: the dustproof frame 4 is further provided with a groove 41, the groove 41 is opened at the corner of the frame 42, and a loading groove 43 is provided on the inner side of the frame 42, and the protrusion 44 is installed in the inner wall of the frame 42 through the loading groove 43.

[0043] The size of the groove 41 matches that of the fixing plug 523 of the top cover 522 and the frame 42 can be vertically embedded in the fixing ring 221 of the partition fixing member 22 of the insulating base 2 through the internal protrusion 44 to complete the assembly.

[0044] The protrusion 44 is further provided with a locking bolt 441 . The locking bolt 441 passes through the center of the block 442 and a magnetic suction cup 443 is connected to the bottom of the block 442 .

[0045] The block 442 is vertically mounted on the inner wall of the frame 42 via a magnetic suction cup 443 and assembled via a locking bolt 441 . The length of the locking bolt 441 is greater than the combined length of the block 442 and the magnetic suction cup 443 .

[0046] Specific functions and operation procedures of this embodiment: In the present invention, the frame 42 of the dustproof frame 4 can be connected with the fixed plugs 523 at the lower corners of the top cover 522 through the grooves 41 at the four corners of the upper end, and then the loading slot 43 on the inner side of the frame 42 can provide installation space for the energy storage battery 24, ensuring that the energy storage battery 24 can be positioned in the loading slot 43 through the frame 42 for use, and then the protrusion 44 on the inner wall of the frame 42 can install the cylindrical block 442 at the origin through the magnetic suction cup 443, and then use the locking bolt 441 to penetrate and lock it, so that it can improve its own origin positioning effect, and finally the block 442 can be inserted into the fixing ring 221 of the partition fixing part 22 through the cylindrical protrusion state, thereby achieving a stable effect of vertical fixed assembly, thereby effectively improving the convenience of use and disassembly of the overall components.

[0047] Utilizing the technical solution of the present invention, or those skilled in the art designing similar technical solutions inspired by the technical solution of the present invention to achieve the above technical effects, all fall within the scope of protection of the present invention.

Claims

1. An overload-proof lithium battery energy storage device, comprising: A through slot (1), an insulating base (2), an adsorption frame (3), a dustproof frame (4), and an anti-overload monitor (5), wherein the through slot (1) and the insulating base (2) are integrated and the adsorption frame (3) covers the edge of the insulating base (2), the dustproof frame (4) is arranged at the upper end of the insulating base (2) and the top is equipped with an anti-overload monitor (5), and is characterized in that: The anti-overload monitor (5) is provided with a vertical pull block (51), the vertical pull block (51) is welded to the left and right sides of the current overload protector (52), and the top of the current overload protector (52) is connected to an electric energy output shaft (53), and the lower end of the current overload protector (52) is also provided with a conductive shaft (54), and the bottom of the conductive shaft (54) is connected to a power plug (55); The top area of the current overload protector (52) is further provided with a welding groove (521), the welding groove (521) is opened on the left and right sides of the top cover (522), the lower corner area of the top cover (522) is connected with a fixed plug (523), the lower edge area of the top cover (522) is further provided with a constant temperature module (524), and insulating clamping rings (525) are fixed on the left and right sides of the constant temperature module (524) to overlap and clamp the edge of the power output shaft (53); The overload protection monitor (5) is installed on the top of the dustproof frame (4) to complete the electrical connection with the energy storage battery inside the insulating base (2) in an interlaced manner, and then the overload protection monitor (5) guides the electric energy through the power plug (55) and the conductive shaft (54), and is continuously monitored in real time by the current overload protector (52) when the electric energy is output. At the same time, the constant temperature module (524) inside the top cover (522) of the current overload protector (52) is communicated with the inside of the dustproof frame (4) according to the covering position of the top cover (522), and then the insulating clamp ring (525) is overlapped and fixed with the bottom edge of the electric energy output shaft (53).

2. The overload-proof lithium battery energy storage device according to claim 1, characterized in that: The through slots (1) are distributed in the edge area of the insulating base (2), and a set of adsorption frames (3) are provided on both the left and right sides of the insulating base (2), and the upper layer and the dustproof frame (4) are perpendicular to each other, and the overload protection monitor (5) is located at the center of the upper end of the dustproof frame (4).

3. The overload-proof lithium battery energy storage device according to claim 1, characterized in that: The vertical pull block (51) is made of plastic and is located on the left and right sides of the current overload protector (52). The power output module (53) is set in a vertical orientation. The number of the conductive shafts (54) is consistent with the number of the power output shafts (53) and is located on the same vertical line. The power plug (55) is a solid circular shape.

4. The overload-proof lithium battery energy storage device according to claim 1, characterized in that: The welding groove (521) is in a square concave shape and is provided at one position on each of the left and right sides of the top cover (522). Four fixed plugs (523) are provided at the lower corners of the top cover (522). The constant temperature module (524) and the insulating clamp ring (525) are spaced in a coordinated manner.

5. The overload-proof lithium battery energy storage device according to claim 1, characterized in that: The surface of the insulating base (2) is further provided with a parallel plate (21), and the center of the parallel plate (21) is connected to two sides of the surface center with separation fixing members (22), and the connecting plate (23) is fixed in the interval between the two groups of separation fixing members (22). The center of the connecting plate (23) is provided with an energy storage battery (24), and the edges of the energy storage battery (24) are further connected with splicing blocks (25), which are fixedly connected to one end of the support column (26) through the splicing blocks (26). The support column (26) is embedded in the center of the surface of the connecting plate (23), and the center of the energy storage battery (24) is interlaced and fixed with the power plug (55) of the anti-overload monitor (5); Three through-grooves (1) are respectively opened on both sides of the edge of the parallel plate (21), and there is a spacing between the partition fixing piece (22) and the through-grooves (1), and the partition fixing piece (22) is interlaced and connected with the lower end of the dustproof frame (4). The connecting plate (23) and the supporting column (26) are parallel to each other and position the energy storage battery (24).

6. The overload-proof lithium battery energy storage device according to claim 5, characterized in that: The partition fixing member (22) is further provided with a fixing ring (221), wherein the fixing ring (221) is embedded in the surface layer of the contact plate (222), the contact plate (222) overlaps the upper portion of the solid plate (223), and the lower end of the solid plate (223) is further connected to a solid column (224), and a magnetic block (225) is spliced at the lower end of the solid column (224); The fixing ring (221) is circular in shape and has a slot therein. The contact plate (222) and the solid plate (223) are parallel to each other, and a plurality of solid columns (224) and a magnetic block (225) at the lower end of the solid plate (223) are vertically inserted into the parallel plate (21) for adsorption and fixed connection. There is a distance between the distribution position of the solid columns (224) and the magnetic block (225) and the through slot (1).

7. The overload-proof lithium battery energy storage device according to claim 1, characterized in that: The dustproof frame (4) is further provided with a groove (41), the groove (41) being opened at the corner of the frame (42), and a loading groove (43) being provided inside the frame (42), through which the protrusion (44) is mounted on the inner wall of the frame (42); The size of the groove (41) matches the size of the fixed plug (523) of the top cover (522), and the frame (42) can be vertically embedded in the fixing ring (221) of the partition fixing member (22) of the insulating base (2) through the internal protrusion (44) to complete the assembly.

8. The overload-proof lithium battery energy storage device according to claim 7, characterized in that: The protrusion (44) is further provided with a locking bolt (441), the locking bolt (441) passes through the center of the block (442), and a magnetic suction cup (443) is connected to the bottom of the block (442); The block (442) is vertically mounted on the inner wall of the frame (42) via the magnetic suction cup (443) and assembled via the locking bolt (441). The length of the locking bolt (441) is greater than the combined length of the block (442) and the magnetic suction cup (443).

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