Device for quickly disassembling and assembling low-voltage current transformer

Abstract

The invention solves the problems that manual disassembly and assembly are difficult to operate and the efficiency is low when an idle gap in a power distribution cabinet is narrow, and relates to the technical field of mutual inductor disassembly and assembly, in particular to a device for quickly disassembling and assembling a low-voltage current transformer. The disassembling and assembling mechanism comprises a connecting pipeline located on one side of the mutual inductor body, the rear end of the connecting pipeline is rotationally connected with a butt joint plate, an electric driving assembly is inserted into the connecting pipeline, the rear surface of the butt joint plate is rotationally connected with a sleeve assembly meshed with the electric driving assembly, and the electric driving assembly drives the sleeve assembly to rotate. And a shifting assembly is installed on the front face of the butt joint plate, and when the butt joint plate is controlled by the shifting assembly to rotate by 180 degrees relative to the connection pipeline, the position where the sleeve assembly is located is switched between the two sides of the connection pipeline. The hexagon bolt on the mutual inductor body can be quickly disassembled and assembled, and the device is suitable for a power distribution cabinet environment with a narrow gap.

Description

Technical Field

[0001] The invention relates to the technical field of mutual inductor disassembly and assembly, in particular to a device for quickly disassembling and assembling a low-voltage current mutual inductor. Background Art

[0002] Low-voltage current transformers play an important monitoring role in power distribution systems. However, when inspecting, maintaining, or replacing equipment, disassembling and installing current transformers usually takes a lot of time, especially in distribution cabinets with narrow spaces and complex cable wiring.

[0003] Traditional disassembly and assembly methods rely on manual operation and cumbersome tools. Manual operation usually involves rotating a wrench to disassemble and assemble the hexagonal bolts that come with the low-voltage current transformer. Therefore, a large space is required for operation, which increases the difficulty of operation for distribution cabinets with narrow free space. In addition, since manual wrenches need to be rotated repeatedly for disassembly and assembly, the difficulty of disassembly and assembly is further increased and efficiency is reduced. Summary of the Invention

[0004] In view of the deficiencies in the prior art, the present invention aims to provide a device for quickly disassembling and assembling a low-voltage current transformer, so as to solve the problem in the background art mentioned above that manual disassembly and assembly is difficult and inefficient when the free space in the distribution cabinet is narrow.

[0005] To achieve the above object, the present invention provides the following technical solution: a device for quickly disassembling and assembling a low-voltage current transformer, comprising a disassembly mechanism and a transformer body, wherein a collection assembly is installed on the disassembly mechanism;

[0006] The disassembly and assembly mechanism includes a connecting pipe located on one side of the transformer body, the rear end of the connecting pipe is rotatably connected to a connecting plate, an electric drive component is inserted into the connecting pipe, the rear surface of the connecting plate is rotatably connected to a sleeve component that engages with the electric drive component, the electric drive component drives the sleeve component to rotate, thereby driving the hexagonal bolt inserted in the sleeve component to rotate accordingly, and a toggle component is installed on the front side of the connecting plate. When the toggle component controls the connecting plate to rotate 180 degrees relative to the connecting pipe, the position of the sleeve component is switched between the two sides of the connecting pipe;

[0007] The toggle assembly includes a positioning shaft fixedly mounted on the front surface of the docking plate, the surface of the positioning shaft is connected to a sleeve rod in a front-to-rear axial sliding manner, the outer surface of the sleeve rod is fixedly connected to an extension rod, and the center of the rear end of the extension rod is coaxial with the center of the sleeve assembly.

[0008] Preferably, the connecting pipe is rotatably connected to the docking plate, limit blocks are installed on both sides of the connecting pipe surface, and a lap block is installed on the front of the docking plate. The rotation angle of the docking plate relative to the tail end of the connecting pipe is between 0°-180°.

[0009] Preferably, a connecting strip inserted into the sleeve assembly is installed on the back of the docking plate. The connecting strip is arranged in a semicircular shape, and its cross-sectional shape is either T-shaped or L-shaped.

[0010] Preferably, the sleeve assembly includes a disassembly sleeve, a front surface of the disassembly sleeve is provided with an annular groove that fits the connection strip, and an outer surface of the disassembly sleeve is fixedly provided with a gear ring.

[0011] Preferably, the electric drive assembly consists of a hexagonal locking column, a rotating shaft, a spur gear and an electric wrench. The hexagonal locking column, the rotating shaft and the spur gear are fixedly connected in sequence from front to back. The electric wrench is arranged on the surface of the hexagonal locking column, and the spur gear is engaged with the gear ring.

[0012] Preferably, the connecting pipe is fixedly composed of a thin tube part and a thick tube part from back to front, a limiting ring is fixedly installed inside the thin tube part, and the inner diameter of the limiting ring is consistent with the diameter of the rotating shaft.

[0013] Preferably, a through slot is provided on the top of the thick tube portion, and a support bracket is installed on the bottom of the thick tube portion, and the support bracket is used to support the electric wrench.

[0014] Preferably, the collecting assembly includes a bracket fixedly mounted on the bottom of the connecting pipe, two telescopic frames arranged side by side are mounted on the back of the bracket, and an elastic structure is mounted on the bottom of the telescopic frame.

[0015] Preferably, the cross-section of the telescopic frame is arranged in a semicircular shape, and the telescopic frame is located below the sleeve assembly. When the hexagonal bolt is completely detached from the transformer body and the sleeve assembly, the hexagonal bolt falls straight down into the telescopic frame.

[0016] By means of the above technical solution, the present invention provides a device for quickly disassembling and assembling a low-voltage current transformer, which has at least the following beneficial effects:

[0017] 1. The present invention sleeves the sleeve assembly onto the hexagonal head of the hexagonal bolt, then docks the electric wrench onto the hexagonal locking column and activates it, utilizes the rotational force generated by the sleeve assembly, and controls the spur gear to rotate in a set direction through the hexagonal locking column and the rotating shaft. In addition, the meshing characteristics between the spur gear and the sleeve assembly are utilized to enable the sleeve assembly to drive the hexagonal bolt to rotate accordingly, thereby realizing rapid disassembly and assembly of the hexagonal bolt on the transformer body. The invention is suitable for distribution cabinet environments with narrow gaps and can effectively improve efficiency.

[0018] 2. The present invention provides a new path for transmitting torque through spur gears, avoiding the limitation of directly operating the socket assembly, and can effectively solve the problem of not being able to use an electric wrench to directly control the socket assembly to disassemble and assemble the hexagonal bolt.

[0019] 3. The present invention controls the docking plate to rotate along the tail end of the connecting pipe by a toggle assembly, so as to flip the sleeve assembly located on the right side of the spur gear to the left side, thereby making the disassembly and assembly mechanism suitable for the disassembly and assembly of the hexagonal bolts on both sides of the transformer body.

[0020] 4. After the sleeve assembly is docked with the hexagonal bolt, the present invention can be disassembled and assembled with one hand, which can improve the flexibility and efficiency of the operation, while also reducing the operational risks, making it safer and more convenient.

[0021] 5. After the hexagonal bolts on the transformer body are removed, the present invention controls the disassembly and assembly mechanism to move backward, and pushes the sleeve rod backward along the positioning axis, driving the expansion rod to push the hexagonal bolts clamped in the sleeve assembly backward, causing it to fall down inside the telescopic frame. This can effectively prevent the hexagonal bolts from falling into the gap of the distribution cabinet during the subsequent transfer, and can effectively improve the disassembly efficiency when removing the two hexagonal bolts on the transformer body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 Schematic diagram of the installation structure of the disassembly and assembly mechanism of the present invention;

[0025] Figure 3 This is a schematic diagram of the installation structure of the connecting pipe and the toggle assembly of the present invention;

[0026] Figure 4 This is a schematic diagram of the split structure of the connecting pipeline of the present invention;

[0027] Figure 5 It is a schematic structural diagram of the electric drive assembly of the present invention;

[0028] Figure 6 This is a schematic diagram of the disassembled structure of the hexagonal locking column and the electric wrench of the present invention;

[0029] Figure 7 It is a schematic diagram of the planar structure of the present invention;

[0030] Figure 8 Schematic diagram of the structure of the collection component of the present invention.

[0031] In the picture:

[0032] 1. Assembly and disassembly mechanism; 101. Connecting pipe; 1011. Thin tube portion; 1012. Thick tube portion; 1013. Stop ring; 1014. Through groove; 1015. Support bracket; 102. Docking plate; 1021. Overlap block; 1022. Connecting strip; 103. Electric drive assembly; 1031. Hexagonal locking column; 1032. Rotating shaft; 1033. Spur gear; 1034. Electric wrench; 104. Sleeve assembly; 1041. Assembly and disassembly sleeve; 1042. Annular groove; 1043. Gear ring; 105. Toggle assembly; 1051. Positioning shaft; 1052. Sleeve rod; 1053. Extension rod; 106. Stop block;

[0033] 2. Collection component; 201. Bracket; 202. Telescopic frame; 203. Elastic structure;

[0034] 3. Transformer body; 4. Hexagonal bolt. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] Example 1

[0037] See also Figures 1-8This embodiment provides a device for quickly disassembling and assembling a low-voltage current transformer, which can achieve rapid disassembly and assembly of the low-voltage current transformer. The transformer disassembly and assembly tool mainly consists of a disassembly and assembly mechanism 1 and a collection component 2, while the hexagonal bolt 4 matched with the transformer body 3 serves as the object to be disassembled and assembled. The disassembly and assembly mechanism 1 includes a connecting pipe 101 located on one side of the transformer body 3, and the rear end of the connecting pipe 101 is rotatably connected to the docking plate 102. An electric drive component 103 is inserted into the connecting pipe 101, and the electric drive component 103 is composed of a hexagonal locking column 1031, a rotating shaft 1032, a spur gear 1033 and an electric wrench 1034. The hexagonal locking column 1031, the rotating shaft 1032 and the spur gear 1033 are fixedly connected in sequence from front to back, and the electric wrench 1034 is sleeved on the surface of the hexagonal locking column 1031. The rear surface of the docking plate 102 is rotatably connected to the sleeve assembly 104 that engages with the electric drive assembly 103. The electric drive assembly 103 drives the sleeve assembly 104 to rotate, thereby driving the hexagonal bolt 4 inserted in the sleeve assembly 104 to rotate. The low-voltage current transformer body 3 is typically used in conjunction with a power distribution cabinet. When the low-voltage current transformer body 3 needs to be disassembled and assembled with the power distribution cabinet, the sleeve assembly 104 is aligned with the hexagonal bolt 4 and fitted over the hexagonal head of the hexagonal bolt 4. The power wrench 1034 in the power drive assembly 103 is then operated, driving the hexagonal locking column 1031 and the rotating shaft 1032 to cause the spur gear 1033 to rotate steadily in the set direction. As the rotating shaft 1032 rotates, it drives the meshed sleeve assembly 104 to rotate along with it, thereby controlling the forward or backward rotation of the hexagonal bolt 4 connected to the sleeve assembly 104, prompting it to adjust its position relative to the rear wall of the power distribution cabinet, thereby achieving the rapid assembly and disassembly function of the hexagonal bolt 4.

[0038] In addition, since the hole groove for installing the hexagonal bolt 4 in the conventional transformer body 3 extends close to the side of the main body of the transformer body 3, the structure for driving the sleeve assembly 104 to rotate is arranged in front of the hole groove, which will be affected by insufficient space. In this embodiment, Figure 1As shown, when the hexagonal bolt 4 assembled between the transformer body 3 and the distribution cabinet needs to be disassembled, the front end of the disassembly mechanism 1 is extended along the aperture in the distribution cabinet to the vicinity of the hexagonal bolt 4. Then, by controlling the lateral and rearward movement of the disassembly mechanism 1, the sleeve assembly 104 is sleeved onto the hexagonal head of the hexagonal bolt 4 to be disassembled. Since the additional spur gear 1033 is located on the side of the sleeve assembly 104 and the two mesh with each other, the additional spur gear 1033 provides a new path for transmitting torque. The electric wrench 1034 drives the spur gear 1033 to rotate via the hexagonal locking column 1031 and the rotating shaft 1032, avoiding the limitation of directly operating the sleeve assembly 104 and effectively solving the problem of being unable to use the electric wrench 1034 to directly control the sleeve assembly 104 to disassemble and assemble the hexagonal bolt 4. In actual application, the outer sides of the spur gear 1033 and the sleeve assembly 104 are wrapped with protective covers to prevent scratches on the lines inside the distribution cabinet. In this embodiment, they are not shown only to more clearly express the meshing condition of the spur gear 1033 and the sleeve assembly 104.

[0039] Example 2

[0040] like Figure 1-Figure 3 As shown, the connecting pipe 101 is rotatably connected to the docking plate 102. A toggle assembly 105 is mounted on the front of the docking plate 102. When the docking plate 102 rotates 180 degrees relative to the connecting pipe 101 via the toggle assembly 105, the position of the sleeve assembly 104 switches between the two sides of the connecting pipe 101. The toggle assembly 105 includes a positioning shaft 1051 fixedly mounted on the front surface of the docking plate 102. A sleeve rod 1052 is slidably connected to the surface of the positioning shaft 1051 along the front-to-back axial direction. Following the above-mentioned embodiment 1, two holes are usually provided on the rear side of the transformer body 3 to ensure the firmness of the transformer body 3 when assembled with the rear wall of the distribution cabinet. Therefore, after the hexagonal bolt 4 in one of the holes is removed by using the disassembly and assembly mechanism 1, it is necessary to apply external force to the toggle assembly 105 to drive the docking plate 102 to rotate along the rear end of the connecting pipe 101, so as to flip the sleeve assembly 104 located on the right side of the spur gear 1033 to the left, thereby making the disassembly and assembly mechanism 1 suitable for the disassembly and assembly of the hexagonal bolts 4 on both sides of the transformer body 3.

[0041] Specifically, limit blocks 106 are installed on both sides of the surface of the connecting pipe 101, and a lap block 1021 is installed on the front of the docking plate 102. The docking plate 102 can rotate between 0° and 180° relative to the rear end of the connecting pipe 101. The two limit blocks 106 define the rotation trajectory and angle of the docking plate 102, ensuring that the sleeve assembly 104 is on the same horizontal line before and after a 180° rotation.

[0042] Example 3

[0043] The back of the docking plate 102 is equipped with a connecting strip 1022 that is inserted into the sleeve assembly 104. The connecting strip 1022 is arranged in a semicircular shape, and its cross-sectional shape is either T-shaped or L-shaped. The sleeve assembly 104 includes a disassembly sleeve 1041. The front of the disassembly sleeve 1041 is provided with an annular groove 1042 that fits the connecting strip 1022, which is intended to prevent the disassembly sleeve 1041 from being separated from the connecting strip 1022. The outer surface of the disassembly sleeve 1041 is fixedly covered with a gear ring 1043, and the spur gear 1033 is engaged with the gear ring 1043. The gear ring 1043 receives the rotational driving force from the rotation of the spur gear 1033, controls the disassembly sleeve 1041 to rotate accordingly, and cooperates with the staff to drive the disassembly mechanism 1 forward or backward according to the advancement rate of the hexagonal bolt 4 disassembly and assembly, and finally realizes the disassembly and assembly operation of the hexagonal bolt 4 inserted in the sleeve assembly 104.

[0044] Example 4

[0045] Under normal circumstances, the staff puts the sleeve assembly 104 on the hexagonal head of the corresponding hexagonal bolt 4, and the staff needs to hold the connecting pipe 101 and the power wrench 1034 with both hands. At the moment when the two hexagonal bolts 4 on the transformer body 3 are removed, the transformer body 3 will fall down, and the collision between it and the bottom wall of the distribution cabinet will easily cause scratches on the surface of the transformer body 3. In order to effectively solve this problem, Figure 1 、 Figure 4 and Figure 5 As shown, the connecting pipe 101 is composed, from back to front, of a thin tube portion 1011 and a thick tube portion 1012. A limit ring 1013 is fixedly mounted inside the thin tube portion 1011. The inner diameter of the limit ring 1013 is consistent with the diameter of the rotating shaft 1032, ensuring that the rotating shaft 1032, which passes through the limit ring 1013, is not easily eccentric during rotation. A support bracket 1015 is mounted at the bottom of the thick tube portion 1012. After the sleeve assembly 104 is mounted on the hexagonal bolt, the power wrench 1034 is inserted into the hexagonal locking column 1031. The handle of the power wrench 1034 rests on the flat plate of the support bracket 1015, and the handle and the handle of the support bracket 1015 are parallel. Therefore, in subsequent use, a worker can grasp the handle and the handle with one hand, achieving simultaneous support of the power wrench 1034 and the connecting pipe 101. At this time, the worker can use his other hand to lift the transformer body 3 to prevent it from falling down after the two hexagonal bolts 4 are disassembled.

[0046] Specifically, a through slot 1014 is provided at the top of the thick tube portion 1012 , so that the front end of the hexagonal locking column 1031 is exposed to the outside and can be easily observed, thereby facilitating docking when the electric wrench 1034 is inserted.

[0047] Example 5

[0048] like Figure 1 and Figure 8 As shown, continuing with the first embodiment described above, the collection assembly 2 includes a bracket 201 fixedly mounted at the bottom of the connecting pipe 101. Two telescopic frames 202 are mounted on the back of the bracket 201, and an elastic structure 203 is mounted on the bottom of the telescopic frames 202. The telescopic frames 202 have a semicircular cross-section and are positioned below the sleeve assembly 104. When the sleeve assembly 104 is fitted over the hexagonal bolt 4 to initiate disassembly, the rear end of the telescopic frame 202 abuts against the rear wall of the distribution cabinet where the transformer body 3 is mounted, and is subjected to a compressive force, causing the telescopic frame 202 to contract, and the elastic structure 203 to follow suit. As the hexagonal bolt 4 gradually rotates out of the hole groove area on the rear wall of the distribution cabinet and the transformer body 3, the extrusion force on the elastic structure 203 gradually decreases until it is eliminated, which drives the telescopic frame 202 to return to its original state. When the hexagonal bolt 4 is completely separated from the transformer body 3 and the sleeve assembly 104, the hexagonal bolt 4 falls straight down into the telescopic frame 202. After that, by turning the assembly 105 to flip the docking plate 102 180 degrees and adjusting the sleeve assembly 104 to the other side of the connecting pipe 101, the disassembly tool can be directly moved to the location of the hexagonal bolt 4 on the other side of the transformer body 3 for disassembly. There is no need to retract the disassembly tool and remove the disassembled hexagonal bolt 4. When space conditions permit, the efficiency of disassembly of the transformer body 3 can be improved, and the situation of the disassembled hexagonal bolt 4 falling into the gap of the distribution cabinet between disassembly and transfer can be effectively avoided.

[0049] Example 6

[0050] Continuing with the fifth embodiment described above, an extension rod 1053 is fixedly connected to the outer surface of the sleeve rod 1052, and the center of the rear end of the extension rod 1053 is coaxial with the center of the sleeve assembly 104. After the hexagonal nut 4 is removed, the sleeve rod 1052 is pushed backward along the positioning axis 1051, which drives the extension rod 1053 to move backward with it. The rear end of the extension rod 1053 exerts a backward force on the hexagonal bolt 4 inside the sleeve assembly 104, easily transferring the hexagonal bolt 4 into the telescopic frame 202.

[0051] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A device for quickly disassembling and assembling a low-voltage current transformer, characterized by: It comprises a disassembly and assembly mechanism (1) and a mutual inductor body (2), wherein a collecting assembly (2) is mounted on the disassembly and assembly mechanism (1); The disassembly and assembly mechanism (1) comprises a connecting pipe (101) located on one side of the mutual inductor body (3); the rear end of the connecting pipe (101) is rotatably connected to a docking plate (102); an electric drive assembly (103) is inserted into the connecting pipe (101); the rear surface of the docking plate (102) is rotatably connected to a sleeve assembly (104) engaged with the electric drive assembly (103); the electric drive assembly (103) drives the sleeve assembly (104) to rotate, thereby driving the hexagonal bolt (4) inserted into the sleeve assembly (104) to rotate accordingly; a toggle assembly (105) is installed on the front side of the docking plate (102); when the toggle assembly (105) controls the docking plate (102) to rotate 180° relative to the connecting pipe (101), the position of the sleeve assembly (104) is switched between the two sides of the connecting pipe (101); The toggle assembly (105) comprises a positioning shaft (1051) fixedly mounted on the front surface of the docking plate (102); the surface of the positioning shaft (1051) is slidably connected to a sleeve rod (1052) along the front-back axial direction; the outer surface of the sleeve rod (1052) is fixedly connected to an extension rod (1053); and the center of the rear end of the extension rod (1053) is coaxial with the center of the sleeve assembly (104).

2. The device for rapid disassembly and assembly of a low-voltage current transformer according to claim 1, characterized in that: The connecting pipe (101) is rotatably connected to the docking plate (102); limit blocks (106) are installed on both sides of the surface of the connecting pipe (101); a lap block (1021) is installed on the front of the docking plate (102); and the rotation angle of the docking plate (102) relative to the tail end of the connecting pipe (101) is between 0° and 180°.

3. The device for rapid disassembly and assembly of a low-voltage current transformer according to claim 1, characterized in that: A connecting strip (1022) inserted into the sleeve assembly (104) is installed on the back of the docking plate (102). The connecting strip (1022) is arranged in a semicircular shape, and its cross-sectional shape is either T-shaped or L-shaped.

4. The device for rapid assembly and disassembly of a low-voltage current transformer according to claim 1, characterized in that: The sleeve assembly (104) comprises a disassembly sleeve (1041), a front surface of the disassembly sleeve (1041) is provided with an annular groove (1042) that fits the connection strip (1022), and an outer surface of the disassembly sleeve (1041) is fixedly sleeved with a gear ring (1043).

5. The device for rapid disassembly and assembly of a low-voltage current transformer according to claim 1, characterized in that: The electric drive assembly (103) is composed of a hexagonal locking column (1031), a rotating shaft (1032), a spur gear (1033) and an electric wrench (1034). The hexagonal locking column (1031), the rotating shaft (1032) and the spur gear (1033) are fixedly connected in sequence from front to back. The electric wrench (1034) is sleeved on the surface of the hexagonal locking column (1031), and the spur gear (1033) is engaged with the gear ring (1043).

6. The device for rapid disassembly and assembly of a low-voltage current transformer according to claim 1, characterized in that: The connecting pipe (101) is fixedly composed of a thin tube part (1011) and a thick tube part (1012) from back to front, and a limiting ring (1013) is fixedly installed inside the thin tube part (1011), and the inner diameter of the limiting ring (1013) is consistent with the outer diameter of the rotating shaft (1032).

7. The device for rapid disassembly and assembly of a low-voltage current transformer according to claim 6, characterized in that: A through slot (1014) is provided on the top of the thick tube portion (1012), and a support bracket (1015) is installed on the bottom of the thick tube portion (1012), and the (1015) is used to support the electric wrench (1034).

8. The device for rapid assembly and disassembly of a low-voltage current transformer according to claim 1, characterized in that: The collecting assembly (2) comprises a bracket (201) fixedly mounted on the bottom of the connecting pipe (101); two telescopic frames (202) arranged side by side are mounted on the back of the bracket (201); and an elastic structure (203) is mounted on the bottom of the telescopic frames (202).

9. The device for rapid disassembly and assembly of a low-voltage current transformer according to claim 8, characterized in that: The cross-section of the telescopic frame (202) is arranged in a semicircular shape. The telescopic frame (202) is located below the sleeve assembly (104). When the hexagonal bolt (4) is completely separated from the mutual inductor body (3) and the sleeve assembly (104), the hexagonal bolt (4) falls straight down into the telescopic frame (202).

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