Pressing buckle pushing press-fitting mechanism of airborne transmission line broken strand repairing robot

Abstract

The invention discloses a pressing, buckling, pushing and press-fitting mechanism of an airborne broken strand repairing robot for a power transmission line. The pressing, buckling, pushing and press-fitting mechanism comprises a rack, a pressing and buckling part and a pushing part, the rack comprises a top plate capable of being connected with the unmanned aerial vehicle and side plates which are fixedly connected with the left side and the right side of the top plate and extend downwards, and an avoiding channel for avoiding the power transmission line is formed between the side plates; the pressing buckle part comprises a driving mechanism and two clamping blocks, the pushing part comprises a pressing buckle lifting mechanism and a pressing buckle supply mechanism, the pressing buckle supply mechanism is installed on the outer side of the side plate and used for conveying pressing buckles to the pressing buckle lifting mechanism, the pressing buckle lifting mechanism comprises a support, a rotating arm and a bracket, and the pressing buckle lifting mechanism further comprises a rotating mechanism and a transmission mechanism. According to the pressing, buckling, pushing and press-fitting mechanism of the machine-mounted broken strand repairing robot for the power transmission line, when the repairing robot vertically goes on the line downwards, the rack, the pushing part and the press-fitting part do not interfere with the power transmission line.

Description

Technical Field

[0001] The invention relates to the technical field of power transmission line broken strand repair, and in particular to a buckle pushing and pressing mechanism of an airborne power transmission line broken strand repair robot. Background Art

[0002] The existing broken strand repair robot can refer to the patent with application number CN2022108257899, which includes a control platform, a walking mechanism, a repair mechanism and a clip supply mechanism. The walking mechanism, the repair mechanism and the clip supply mechanism are all installed on the upper side of the control platform. When the repair robot is working, the walking mechanism walks on the transmission line, the clip supply mechanism delivers clips to the repair mechanism, the repair mechanism moves vertically upward, and crimps the clip onto the transmission line.

[0003] The control platform of the existing repair robot is basically a rectangular flat plate structure, without a long groove to avoid the transmission line, and the clip supply mechanism and the repair mechanism are basically located directly below the walking axis of the walking mechanism. When the repair robot goes online vertically downward, the control platform, the clip supply mechanism and the repair mechanism will interfere with the transmission line, making it impossible to use a drone to bring the repair robot online; when bringing this type of repair robot online, the operator needs to use a lifting device, such as a safety rope, to lift the repair robot upward close to the transmission line. The operator works at high altitude to install the walking mechanism of the repair robot on the transmission line, which is very troublesome. Summary of the invention

[0004] In order to solve the shortcomings of the clip supply mechanism and the repair mechanism of the existing repair robot, that is, when the repair robot is vertically downward to go online, the control platform, the clip supply mechanism and the repair mechanism will interfere with the transmission line, the present invention proposes an airborne transmission line broken strand repair robot buckle pushing and pressing mechanism, when the repair robot is vertically downward to go online, the frame, the pushing part and the pressing part will not interfere with the transmission line.

[0005] To achieve the above object, the present invention adopts the following technical solution: A pressing and pushing mechanism of an airborne transmission line broken strand repair robot, comprising: a frame, a pressing part and a pushing part; the frame comprises a top plate that can be connected to a drone, and side plates that are fixedly connected to the left and right sides of the top plate and extend downward, the walking mechanism of the repair robot is installed on the lower side of the top plate, and an avoidance channel for avoiding the transmission line is formed between the side plates; the pressing part comprises a driving mechanism and two clamping blocks, the upper ends of the clamping blocks are slidably connected to the top plate, the two clamping blocks are arranged on the left and right sides of the walking axis of the walking mechanism, and the driving mechanism is used to drive the two clamping blocks to open and close so as to press the buckle onto the transmission line; the pushing part comprises a buckle lifting mechanism The buckle lifting mechanism comprises a bracket, a rotating arm and a support, the bracket is vertically mounted on the outer side of the side plate, the upper end of the rotating arm is rotatably connected to the upper end of the bracket, the support is rotatably connected to the lower end of the rotating arm and is close to the output port of the buckle feeding mechanism to support the buckle, the buckle lifting mechanism also includes a rotating mechanism and a transmission mechanism, the rotating mechanism is connected to the bracket through the transmission mechanism, the rotating mechanism drives the rotating arm to rotate, the opening of the buckle is always upward, the support is close to the lower side of the transmission line, and the buckle is buckled on the lower side of the transmission line.

[0006] Through the above arrangement, when the repair robot goes online vertically downward, the frame, the pressing part and the pushing part will not interfere with the power transmission line.

[0007] Furthermore, the driving mechanism includes: a guide rail, a screw and a first motor; the guide rail is installed on the lower side of the top plate, and the upper ends of the two clamps are slidably connected to the lower side of the guide rail; the screw is connected to the lower side of the guide rail for parallel rotation, and the screw includes a first threaded portion threadedly connected to one of the clamps, and a second threaded portion threadedly connected to the other clamp, and the thread directions of the first threaded portion and the second threaded portion are opposite; the first motor is installed on the top plate, and the first motor is connected to the screw.

[0008] Through the above arrangement, the clamping block is slidably connected to the lower side of the top plate through the guide rail, and the clamping block is more stable when moving; the first motor drives the two clamping block switches through the lead screw.

[0009] Furthermore, the rotating mechanism includes: a second motor, a first pulley, a second pulley, a synchronous belt and a rotating shaft; the second motor is installed at the lower end of the bracket; the first pulley is installed on the output shaft of the second motor; the second pulley is rotatably connected to the upper end of the bracket; the first pulley and the second pulley are connected through a synchronous belt transmission; one end of the rotating shaft is coaxially fixedly connected to the second pulley, and the other end of the rotating shaft is fixedly connected to the upper end of the rotating arm.

[0010] Through the above arrangement, the second motor drives the rotating arm to rotate via the first pulley, the synchronous belt, the second pulley and the rotating shaft.

[0011] Furthermore, the transmission mechanism includes: a first transmission wheel, a second transmission wheel and a transmission belt; the first transmission wheel is fixedly mounted on the upper end of the bracket, and the rotating shaft coaxially passes through the first transmission wheel and is rotationally connected to the first transmission wheel; the second transmission wheel has the same outer diameter as the first transmission wheel, the second transmission wheel is rotationally connected to the lower end of the rotating arm, and is fixedly connected to the bracket; the first transmission wheel is transmission-connected to the second transmission wheel through a transmission belt.

[0012] Through the above arrangement, the bracket is prevented from self-rotating during the rotation of the rotating arm.

[0013] Furthermore, a storage groove with an upward opening and adapted to the buckle is provided on the bracket, a feed port is provided on one side of the bracket close to the buckle supply mechanism, and the buckle supply mechanism delivers the buckle to the storage groove through the feed port, and avoidance grooves for avoiding clamping blocks are provided on the left and right sides of the bracket.

[0014] Through the above arrangement, the stability of the buckle on the bracket is increased.

[0015] Furthermore, the buckle supply mechanism includes: a silo and an electric push rod; the silo is vertically installed on the outer side of the side plate, the silo is used for vertically stacking buckles, and the output port of the buckle supply mechanism is arranged on the bottom side of the silo close to the bracket, the output port faces the feed port of the bracket, and a through hole is arranged on the side of the silo away from the output port; the electric push rod is installed on the outer side of the side plate, the output shaft of the electric push rod is close to the bottom of the silo, and can pass through the through hole to push the buckle at the bottom of the silo to the bracket.

[0016] Through the above settings, the electric push rod pushes the buckles at the bottom of the silo to the bracket one by one. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of the buckle pushing and pressing mechanism of the embodiment.

[0018] Figure 2 for Figure 1 Enlarged view of point A.

[0019] Figure 3 It is a side view of the buckle pushing and pressing mechanism of the embodiment.

[0020] Figure 4 A cross-sectional view of the buckle push-fitting mechanism of the embodiment Figure 1 .

[0021] Figure 5 A cross-sectional view of the buckle push-fitting mechanism of the embodiment Figure 2 .

[0022] Figure 6 It is a schematic diagram of the buckle pushing and pressing mechanism of the embodiment. DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0024] See also Figures 1 to 6 , a buckle pushing and pressing mechanism of an airborne power transmission line broken strand repair robot, comprising: a frame 3, a pressing part 4 and a pushing part 5; the frame 3 comprises a top plate 31 that can be connected to a drone, and side plates 32 that are fixedly connected to the left and right sides of the top plate 31 and extend downward, wherein, Figure 1 The front, back, left and right directions of the repair robot are indicated in the figure. The walking mechanism of the repair robot is installed on the lower side of the top plate 31, and an avoidance channel 6 for avoiding the transmission line 200 is formed between the side plates 32; the pressing part 4 includes a driving mechanism 41 and two clamping blocks 42. The upper ends of the clamping blocks 42 are slidably connected to the top plate 31. The two clamping blocks 42 are arranged on the left and right sides of the walking axis of the walking mechanism. The driving mechanism 41 is used to drive the two clamping blocks 42 to open and close so as to press the buckle 300 onto the transmission line 200; the pushing part 5 includes a buckle lifting mechanism 51 and a buckle supply mechanism 52. The buckle supply mechanism 52 is installed on the outer side of the side plate 32 and is used to convey the buckle 300 to the buckle lifting mechanism 51. 51 includes a bracket 511, a rotating arm 512 and a bracket 513. The bracket 511 is vertically installed on the outer side of the side plate 32. The upper end of the rotating arm 512 is rotatably connected to the upper end of the bracket 511. The bracket 513 is rotatably connected to the lower end of the rotating arm 512 and is close to the output port 7 of the buckle supply mechanism 52 so as to support the buckle 300. The buckle lifting mechanism 51 also includes a rotating mechanism 514 and a transmission mechanism 515. The rotating mechanism 514 is connected to the bracket 513 through the transmission mechanism 515. The rotating mechanism 514 drives the rotating arm 512 to rotate. The opening of the buckle 300 is always upward. The bracket 513 is close to the lower side of the transmission line 200 and buckles the buckle 300 on the lower side of the transmission line 200.

[0025] Through the above arrangement, when the repair robot goes online vertically downward, the frame, the pressing part 4 and the pushing part 5 will not interfere with the power transmission line 200, making it possible to bring the repair robot online downward by a drone.

[0026] The repair robot with the push-pressing mechanism of the present application is put online through a drone. The lower side of the drone is equipped with an electric clamp. The electric clamp and the drone can be purchased from the market. Both the electric clamp and the drone can be remotely controlled. The upper side of the top plate 31 can be fixed with a lifting ring to facilitate the clamping connection of the electric clamp. Initially, see Figure 4, the rotating arm 512 is vertically downward, the entire buckle lifting mechanism 51 is located outside the avoidance channel 6, the two clamping blocks 42 are opened, so that the distance between the two clamping blocks 42 is greater than the outer diameter of the transmission line 200; the UAV lifts the repair robot to the top of the transmission line 200, lowers the repair robot, and the side panels 32 move downward through the left and right sides of the transmission line 200. The transmission line 200 enters the avoidance channel 6, and the buckle supply mechanism 52 and the buckle lifting mechanism 51 are both located outside the side panels 32, which will not hinder the downward movement of the repair robot. Finally, the repair robot is directly erected on the transmission line 200 through the walking mechanism. After the electric clamp on the lower side of the UAV is opened, the UAV returns to the ground, and the transmission line 200 is located between the two clamping blocks 42. The walking mechanism can refer to the existing repair robot. In this application, the walking mechanism is a roller arranged at the front and rear ends of the top plate 31. When the lower side of the roller contacts the transmission line 200, the walking mechanism is erected on the transmission line 200. At this time, the axis of the transmission line 200 is the walking axis of the walking mechanism; The buckle supply mechanism 52 delivers the buckle 300 to the upper side of the bracket 513, and the bracket 513 supports the buckle 300. The buckle 300 and the buckle supply mechanism 52 can refer to the existing repair robot. The buckle 300 is basically a U-shaped structure with an opening upward. Initially, the buckle 300 on the bracket 513 is lower than the transmission line 200 and is located outside the avoidance channel 6. A notch is provided on the side wall to facilitate the inward rotation of the rotating arm 512. The rotating mechanism 514 drives the rotating arm 512, and the rotating arm 512 rotates around the upper The end of the bracket 510 rotates inwardly. During the rotation process, the rotating mechanism 514 rotates the bracket 513 through the transmission mechanism 515. The bracket 513 rotates relative to the rotating arm 512, so that the bracket 513 does not rotate on its own, so that the opening of the buckle 300 on the upper side of the bracket 513 is always upward. Finally, the buckle 300 buckles upward on the lower side of the transmission line 200, and the driving mechanism 41 drives the two clamping blocks 42 to close. The two clamping blocks 42 clamp the buckle 300, and the buckle 300 is deformed to press the broken strand on the transmission line 200. See Figure 6 After the press-fitting of the buckle 300 is completed, the driving mechanism 41 drives the two clamping blocks 42 to separate, and the rotating mechanism 514 drives the rotating arm 512, and the rotating arm 512 rotates downward to the initial state, and the buckle supply mechanism 52 conveys the buckle 300 to the upper side of the bracket 513 to prepare for the next press-fitting, and after the walking mechanism moves forward a distance along the transmission line 200, the above process is repeated to continue to press-fit the buckle 300 onto the transmission line 200.

[0027] The process of the repair robot going offline is the opposite of the process of going online. The driving mechanism 41 drives the two clamps 42, the two clamps 42 open, the rotating mechanism 514 drives the rotating arm 512, the rotating arm 512 rotates to a vertical downward state, and the ground operator controls the drone to fly to the upper side of the top plate 31. After the electric clamp clamps the lifting ring on the upper side of the top plate 31, the electric clamp clamps the lifting ring, and the drone carries the repair robot away from the transmission line 200, and finally brings the repair robot to the ground.

[0028] As an implementation method, the driving mechanism 41 includes: a guide rail 411, a screw and a first motor 412; the guide rail 411 is installed on the lower side of the top plate 31, and the upper ends of the two clamps 42 are slidably connected to the lower side of the guide rail 411; the screw is connected to the lower side of the guide rail 411 by parallel rotation, and the screw includes a first threaded portion 413 threadedly connected to one of the clamps 42, and a second threaded portion 414 threadedly connected to the other clamp 42, and the thread directions of the first threaded portion 413 and the second threaded portion 414 are opposite; the first motor 412 is installed on the top plate 31, and the first motor 412 is connected to the screw.

[0029] Through the above arrangement, the clamping block 42 is slidably connected to the lower side of the top plate 31 through the guide rail 411, and the clamping block 42 is more stable when moving; the first motor 412 drives the two clamping blocks 42 to switch through the screw rod.

[0030] In the present application, after the first motor 412 drives the screw rod, the first threaded portion 413 and the second threaded portion 414 rotate synchronously, the first threaded portion 413 and the clamping block 42 rotate relative to each other, and the second threaded portion 414 and the clamping block 42 rotate relative to each other. When the thread directions of the first threaded portion 413 and the second threaded portion 414 are opposite, the movement directions of the two clamping blocks 42 are opposite, that is, the two clamping blocks 42 approach each other or move away from each other. The first motor 412 can adopt a servo motor with a torque feedback function. After the clamping block 42 presses the buckle 300, when the torque of the first motor 412 reaches a preset value, it indicates that the clamping force of the clamping block 42 on the buckle 300 meets the requirement, and the first motor 412 rotates in the opposite direction to open the two clamping blocks 42.

[0031] As an implementation method, the rotating mechanism 514 includes: a second motor 5141, a first pulley 5142, a second pulley 5143, a synchronous belt 5144 and a rotating shaft 5145; the second motor 5141 is installed at the lower end of the bracket 511; the first pulley 5142 is installed on the output shaft of the second motor 5141; the second pulley 5143 is rotatably connected to the upper end of the bracket 511; the first pulley 5142 and the second pulley 5143 are connected through a synchronous belt 5144; one end of the rotating shaft 5145 is coaxially fixedly connected to the second pulley 5143, and the other end of the rotating shaft 5145 is fixedly connected to the upper end of the rotating arm 512.

[0032] Through the above arrangement, the second motor 5141 drives the rotating arm 512 to rotate via the first pulley 5142 , the synchronous belt 5144 , the second pulley 5143 and the rotating shaft 5145 .

[0033] In the present application, the radius of the first pulley 5142 is smaller than the radius of the second pulley 5143, thereby achieving the effect of deceleration and increasing torque; the second motor 5141 can adopt a servo motor with an angle feedback function, which facilitates the precise control of the rotation angle of the rotating arm 512, so that the buckle 300 can be accurately buckled on the lower side of the transmission line 200, and accurately return to the initial position to welcome the next buckle 300.

[0034] As an implementation method, the transmission mechanism 515 includes: a first transmission wheel 5151, a second transmission wheel 5152 and a transmission belt 5153; the first transmission wheel 5151 is fixedly installed on the upper end of the bracket 511, and the rotating shaft 5145 coaxially passes through the first transmission wheel 5151 and is rotatably connected to the first transmission wheel 5151; the second transmission wheel 5152 has the same outer diameter as the first transmission wheel 5151, and the second transmission wheel 5152 is rotatably connected to the lower end of the rotating arm 512 and fixedly connected to the bracket 513; the first transmission wheel 5151 is transmission-connected to the second transmission wheel 5152 via the transmission belt 5153.

[0035] Through the above arrangement, the rotating arm 512 can prevent the bracket 513 from rotating during the rotation process.

[0036] In the present application, when the rotating arm 512 rotates, the first transmission wheel 5151 does not rotate. When the second transmission wheel rotates around the axis of the rotating shaft 5145, the first transmission wheel 5151 prevents the second transmission wheel 5152 from rotating through the transmission belt 5153, thereby preventing the bracket 513 fixedly connected to the second transmission wheel 5152 from rotating.

[0037] As an implementation method, a storage groove with an upward opening and adapted to the buckle 300 is provided on the bracket 513, a feed port 5131 is provided on the side of the bracket 513 close to the buckle supply mechanism 52, and the buckle supply mechanism 52 delivers the buckle 300 to the storage groove through the feed port 5131, and avoidance grooves 5132 for avoiding the clamping block 42 are provided on the left and right sides of the bracket 513.

[0038] Through the above arrangement, the stability of the buckle 300 on the bracket 513 is increased.

[0039] In the present application, when the bracket 513 is close to the output port 7 of the buckle supply mechanism 52, the feed port 5131 is aligned with the output port 7, and the buckle supply mechanism 52 places the buckle 300 into the discharge trough of the bracket 513 through the output port 7 and the feed port 5131. The side wall of the discharge trough supports the buckle 300 to prevent the buckle 300 from falling off the bracket 513. A notch for avoiding the transmission line 200 is provided on the side of the bracket 513 away from the feed port 5131. After the bracket 513 buckles the buckle 300 on the lower side of the transmission line 200, the bracket 513 supports the buckle 300, and the two clamps 42 press the buckle 300 onto the transmission line 200 through the avoidance groove 5132.

[0040] As an implementation method, the buckle supply mechanism 52 includes: a material bin 521 and an electric push rod 522; the material bin 521 is vertically installed on the outside of the side plate 32, and the material bin 521 is used to vertically stack the buckles 300, and the output port 7 of the buckle supply mechanism 52 is arranged on the bottom of the material bin 521 close to the side of the bracket 513, the output port 7 faces the feed port 5131 of the bracket 513, and a through hole 523 is arranged on the side of the material bin 521 away from the output port 7; the electric push rod 522 is installed on the outside of the side plate 32, and the output shaft of the electric push rod 522 is close to the bottom of the material bin 521 and can pass through the through hole 523 to push the buckle 300 at the bottom of the material bin 521 to the bracket 513.

[0041] Through the above arrangement, the electric push rod 522 pushes the buckles 300 at the bottom of the silo 521 to the bracket 513 one by one.

[0042] In the present application, multiple buckles 300 are stacked with their openings facing upward in a silo 521, which is a long box placed vertically. The electric push rod 522 pushes the bottom buckle 300 in the silo 521 out of the output port 7 and into the storage slot of the bracket 513. After the electric push rod 522 retracts, the buckles 300 in the silo 521 automatically fall a distance of the height of the buckle 300 under the action of gravity, which is convenient for the next discharge.

[0043] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the appended claims of the present invention.

Claims

1. A buckle pushing and pressing mechanism for an airborne power transmission line broken strand repair robot, characterized in that: include: A frame, the frame comprising a top plate that can be connected to the drone, and side plates that are fixedly connected to the left and right sides of the top plate and extend downward, the walking mechanism of the repair robot is installed on the lower side of the top plate, and an avoidance channel for avoiding the power transmission line is formed between the side plates; A press-fitting part, the press-fitting part comprises a driving mechanism and two clamping blocks, the upper end of the clamping block is slidably connected to the top plate, the two clamping blocks are arranged on the left and right sides of the walking axis of the walking mechanism, and the driving mechanism is used to drive the two clamping blocks to open and close, so as to press the buckle onto the transmission line; A pushing part, wherein the pushing part includes a buckle lifting mechanism and a buckle supply mechanism, wherein the buckle supply mechanism is installed on the outer side of the side plate and is used to deliver buckles to the buckle lifting mechanism, wherein the buckle lifting mechanism includes a bracket, a rotating arm and a support, wherein the bracket is vertically installed on the outer side of the side plate, the upper end of the rotating arm is rotatably connected to the upper end of the bracket, the support is rotatably connected to the lower end of the rotating arm and is close to the output port of the buckle supply mechanism so as to support the buckle, and the buckle lifting mechanism also includes a rotating mechanism and a transmission mechanism, wherein the rotating mechanism is transmission-connected to the support through the transmission mechanism, and the rotating mechanism drives the rotating arm to rotate, the opening of the buckle is always facing upward, and the support is close to the lower side of the transmission line and buckles the buckle on the lower side of the transmission line.

2. According to claim 1, the buckle pushing and pressing mechanism of the airborne power transmission line broken strand repair robot is characterized in that: The driving mechanism comprises: A guide rail, the guide rail is installed on the lower side of the top plate, and the upper ends of the two clamping blocks are slidably connected to the lower side of the guide rail; A screw rod, the screw rod is connected to the lower side of the guide rail for parallel rotation, the screw rod comprises a first threaded portion threadedly connected to one of the clamping blocks, and a second threaded portion threadedly connected to the other clamping block, and the thread directions of the first threaded portion and the second threaded portion are opposite; A first motor is mounted on the top plate and connected to the lead screw.

3. The buckle pushing and pressing mechanism of the airborne power transmission line broken strand repair robot according to claim 1 is characterized in that: The rotating mechanism comprises: a second motor, the second motor being mounted at the lower end of the bracket; a first pulley, the first pulley being mounted on an output shaft of the second motor; a second pulley, the second pulley being rotatably connected to the upper end of the bracket; A synchronous belt, wherein the first pulley and the second pulley are connected by the synchronous belt transmission; A rotating shaft, one end of which is coaxially fixedly connected to the second pulley, and the other end of which is fixedly connected to the upper end of the rotating arm.

4. The buckle pushing and pressing mechanism of the airborne power transmission line broken strand repair robot according to claim 3 is characterized in that: The transmission mechanism comprises: A first transmission wheel, wherein the first transmission wheel is fixedly mounted on the upper end of the bracket, and the rotating shaft coaxially passes through the first transmission wheel and is rotationally connected to the first transmission wheel; a second transmission wheel, the second transmission wheel having the same outer diameter as the first transmission wheel, the second transmission wheel being rotatably connected to the lower end of the rotating arm and fixedly connected to the bracket; A transmission belt, wherein the first transmission wheel is connected to the second transmission wheel through the transmission belt.

5. The buckle pushing and pressing mechanism of the airborne power transmission line broken strand repair robot according to claim 1, characterized in that: The bracket is provided with a storage groove which opens upward and is adapted to the buckle, a feed port is provided on a side of the bracket close to the buckle supply mechanism, and the buckle supply mechanism delivers the buckle to the storage groove through the feed port, and avoidance grooves for avoiding the clamping block are provided on the left and right sides of the bracket.

6. The buckle pushing and pressing mechanism of the airborne power transmission line broken strand repair robot according to claim 5, characterized in that: The buckle supply mechanism comprises: A silo, the silo is vertically mounted on the outside of the side plate, the silo is used to vertically stack the buckles, the output port of the buckle supply mechanism is arranged at the bottom of the silo on one side close to the bracket, the output port faces the feed port of the bracket, and a through hole is arranged on the side of the silo away from the output port; An electric push rod is installed on the outside of the side plate, and an output shaft of the electric push rod is close to the bottom of the silo and can pass through the through hole to push the buckle at the bottom of the silo to the bracket.

Images