Power transmission line iron tower anti-falling device

Abstract

The utility model relates to the technical field of safety protection devices, in particular to an anti-falling device for a power transmission line iron tower, which not only has double anti-falling measures to ensure that a worker does not fall suddenly during climbing, but also does not need to adjust the position of the device repeatedly, simplifies the steps in the climbing process of the worker, can help the worker climb, and improves the safety of the worker. Labor of workers is saved; comprising a backpack mechanism; the device further comprises a fixing mechanism, a protection mechanism, an anti-falling mechanism and two sets of clamping mechanisms, the fixing mechanism is installed on the backpack mechanism and fixes a worker, the protection mechanism is installed on the backpack mechanism and protects the head of the worker, and the anti-falling mechanism is installed on the backpack mechanism and prevents the worker from falling. The two clamping mechanisms are installed on the backpack mechanism, serve as backups of the anti-falling mechanism and are started when the anti-falling mechanism breaks down.

Description

Technical Field

[0001] The utility model relates to the technical field of safety protection devices, in particular to a transmission line iron tower anti-falling device. Background Art

[0002] At present, the anti-fall solution for transmission line towers is generally a rail-type anti-fall method. This device permanently installs the anti-fall track on the tower. The self-locking device is connected to the human body through the safety belt hanging point. It slides up and down with the workers in the process of going up and down the tower. When an accident occurs, it can be effectively locked to prevent falling.

[0003] The existing transmission line tower anti-falling device, for example, a transmission line tower anti-falling device disclosed in the utility model patent with application number 201920223802.7, has a main structure including an upper fixing structure, a tower main material structure and a lower ring bolt, wherein the upper fixing structure and the lower fixing structure are respectively fixedly arranged at the upper and lower ends of the tower main material, and an upper ring bolt and a lower ring bolt are respectively arranged on the upper fixing structure and the lower fixing structure, the upper end of the anti-falling wire rope is connected to the upper ring bolt, the lower end of the anti-falling wire rope is connected to the lower ring bolt, the anti-falling lock is arranged on the anti-falling wire rope, and the anti-falling lock is connected to the safety belt on the human body through a safety rope. When in use, the eccentric body of the anti-fall lock is connected to the safety belt through the safety rope, the front wall body of the anti-fall lock is opened, the anti-fall lock is installed on the anti-fall steel wire rope near the lower fixed structure and the front wall body of the anti-fall lock is closed. After the safety bolt is closed, the operator can carry the anti-fall lock along the anti-fall steel wire rope to climb the main material of the iron tower to perform tower climbing operations. When a fall from a high altitude occurs, the operator falls down at a higher instantaneous speed with the anti-fall lock, and the eccentric body of the anti-fall lock moves quickly with the falling person, squeezing the space between the eccentric body and the front wall body, so that the anti-fall steel wire rope cannot continue to pass through, thereby locking the operator on the anti-fall steel wire rope, effectively preventing the fall from occurring.

[0004] However, most of the existing fall prevention devices require the climbers to repeatedly adjust the position of the device, which is very cumbersome, and most of them only provide one fall prevention measure and cannot effectively ensure the safety of workers. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a transmission line tower anti-fall device which not only sets up double anti-fall measures to ensure that workers will not fall suddenly when climbing, but also does not need to repeatedly adjust the position of the device, simplifies the steps of the workers' climbing process, and can also help workers climb and save workers' physical strength.

[0006] The utility model discloses a transmission line iron tower anti-falling device, which comprises a backpack mechanism; a fixing mechanism, a protective mechanism, an anti-falling mechanism and two groups of clamping mechanisms, wherein the fixing mechanism is installed on the backpack mechanism to fix the worker, the protective mechanism is installed on the backpack mechanism to protect the worker's head, the anti-falling mechanism is installed on the backpack mechanism to prevent the worker from falling, and the two groups of clamping mechanisms are both installed on the backpack mechanism and serve as backups of the anti-falling mechanism, and are activated when the anti-falling mechanism fails; the worker fixes the backpack mechanism on his back through the fixing mechanism, and then protects his head through the protective mechanism, and the worker climbs upward with the backpack mechanism on his back, and the anti-falling mechanism continuously reels a safety rope, which can not only prevent the worker from falling, but also help the worker to climb upward by adjusting the reeling speed of the anti-falling mechanism, and when the worker suddenly falls but the anti-falling mechanism fails, the safety rope can be clamped and fixed by feeding through the clamping mechanism to prevent the worker from falling, and the safety of the worker when climbing the transmission line tower is improved by double anti-falling.

[0007] Preferably, the backpack mechanism includes a shell, a hinge, a carbon fiber door, a door lock, a rangefinder, a sponge pad and a partition. The interior of the shell is provided with a cavity, a rope inlet is provided at the top of the shell and an open opening is provided at the front end of the shell, a hinge is rotatably installed at the open opening of the shell, the carbon fiber door is installed on the hinge, the door lock is installed on the carbon fiber door, the rangefinder is installed on the left side wall of the shell, the sponge pad is installed on the rear side wall of the shell, the partition is installed in the cavity of the shell and divides the cavity of the shell into two upper and lower cavities, and the left and right side walls of the shell are provided with taking openings which are connected with the interior of the lower cavity of the shell; the worker places the relevant equipment in the lower cavity of the shell, then closes the carbon fiber door, and locks it with the door lock to prevent the carbon fiber door from opening naturally during the climbing process, and can take the relevant equipment through the taking opening of the shell when it is needed, which facilitates the work of the worker, and measures the climbing height by setting the rangefinder, and starts the clamping mechanism when the rangefinder detects a sharp drop in height, and can make the worker's back more comfortable by setting the sponge pad.

[0008] Preferably, the shell is made of carbon fiber material; carbon fiber material refers to high-strength and high-modulus fiber with a carbon content of more than 90%, which has the characteristics of high strength, light weight, corrosion resistance, etc., which can reduce the weight of workers and facilitate workers to climb.

[0009] Preferably, the fixing mechanism includes a waist safety belt, a safety belt buckle, two sets of shoulder safety belts and two sets of buckles, the waist safety belt is installed on the shell, the safety belt buckle is installed on the waist safety belt, the two sets of shoulder safety belts are installed on the shell, and the two sets of buckles are respectively installed on the two sets of shoulder safety belts; the worker wears the waist safety belt around the waist, then passes the two sets of shoulder safety belts through the shoulders and inserts the two sets of buckles into the safety belt buckle, thereby fixing the device on the worker, and by providing the waist safety belt and two sets of shoulder safety belts, the worker is fixed in all directions, and the worker can be pulled in time when the worker slips and falls.

[0010] Preferably, the protective mechanism includes a telescopic plate, a support plate, a safety helmet and a telescopic belt, the bottom end of the telescopic plate is connected to the top end of the shell, the bottom end of the support plate is connected to the top end of the telescopic plate, the top end of the safety helmet is connected to the bottom end of the support plate, and the telescopic belt is installed on the safety helmet; the worker adjusts the height of the support plate and the safety helmet by adjusting the telescopic degree of the telescopic plate, the worker wears the safety helmet on his head and fixes the safety helmet to the head through the telescopic belt to protect the head.

[0011] Preferably, the anti-fall mechanism includes a battery, a servo motor, a pulley 1, a bracket, a rotating shaft 1, a pulley 2, a belt, a tensioner, a fixing belt, a spring buckle and a safety rope. The bottom end of the battery is connected to the top end of the partition, the bottom end of the servo motor is connected to the top end of the partition, the pulley 1 is installed on the servo motor, the bracket is installed in the cavity of the shell, the rotating shaft 1 is rotatably installed on the bracket, the pulley 2 is installed on the rotating shaft 1, the belt tensioning is installed between the pulley 1 and the pulley 2, the tensioner is installed in the cavity of the shell, the fixing belt is installed on the rotating shaft 1, one end of the spring buckle is fixedly installed on the top end of the transmission line tower, and the other end of the spring buckle is fixed to the mounting hole. Full rope connection; the worker passes the spring buckle and safety rope through the rope inlet of the shell, the safety rope is buckled on the fixed belt, and then closes the carbon fiber door. In the process of the worker climbing up, the rangefinder measures the height from the ground and transmits the data to the servo motor. The battery transmits power to the servo motor. The servo motor rotates according to the data of the rangefinder. The servo motor drives pulley one to rotate, and pulley one drives pulley two to rotate through the belt. Pulley two drives shaft one to rotate, and shaft one drives the fixed belt to rotate. The fixed belt pulls the safety rope and spring buckle, thereby reeling the spring buckle and matching the reeling speed of the spring buckle with the climbing speed of the worker.

[0012] Preferably, the clamping mechanism includes a motor, a transmission shaft, a bevel gear 1, a rotating shaft 2, a bevel gear 2, an electric cylinder and a clamping plate. The motor is installed in the cavity of the shell, the transmission shaft is rotatably installed on the motor, the bevel gear 1 is installed on the transmission shaft, the rotating shaft 2 is rotatably installed in the cavity of the shell, the bevel gear 2 is installed on the rotating shaft 2, the electric cylinder is installed on the rotating shaft 2, and the clamping plate is installed on the electric cylinder. Two sets of clamping mechanisms are installed relatively to each other and are respectively located on the left and right sides of the spring buckle; after the rangefinder detects a sharp drop in height, the rangefinder starts the electric cylinder through an electrical signal, the electric cylinder pushes the clamping plate, and the clamping plates on the two sets of clamping mechanisms cooperate to clamp the spring buckle, and at the same time the motor is started, the motor drives the transmission shaft to rotate, the transmission shaft drives the bevel gear 1 to rotate, the bevel gear 1 drives the bevel gear 2 to rotate, the bevel gear 2 drives the rotating shaft 2 and the electric cylinder to rotate, and the electric cylinder drives the clamping plate and the spring buckle to rotate, thereby enhancing the fixation of the spring buckle to prevent workers from falling.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the worker fixes the backpack mechanism on the back through the fixing mechanism, and then protects and fixes the head through the protective mechanism; the worker climbs upward with the backpack mechanism on his back, and the anti-fall mechanism continuously reels the safety rope, which can not only prevent the worker from falling, but also help the worker to climb upward by adjusting the reeling speed of the anti-fall mechanism; when the worker suddenly falls but the anti-fall mechanism fails, the safety rope can be urgently clamped and fixed by the clamping mechanism to prevent the worker from falling, thereby improving the safety of the worker when climbing the transmission line tower through double fall protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a front view structural schematic diagram of the utility model;

[0015] Figure 2 It is a schematic diagram of the axonometric structure of the backpack mechanism of the utility model;

[0016] Figure 3 It is an axonometric structural diagram of the backpack mechanism, fixing mechanism and protection mechanism of the utility model;

[0017] Figure 4 It is a cross-sectional axonometric structural diagram of the backpack mechanism and the anti-fall mechanism of the utility model;

[0018] Figure 5 It is a partially enlarged cross-sectional axonometric structural schematic diagram of the clamping mechanism of the utility model.

[0019] Markings in the attached drawings: 01, backpack mechanism; 11, shell; 12, hinge; 13, carbon fiber door; 14, door lock; 15, rangefinder; 16, sponge pad; 17, partition; 02, fixing mechanism; 21, waist safety belt; 22, safety belt buckle; 23, shoulder safety belt; 24, buckle; 03, protection mechanism; 31, telescopic plate; 32, support plate; 33, safety helmet; 34, telescopic belt; 04, protection Falling mechanism; 41. Battery; 42. Servo motor; 43. Pulley 1; 44. Bracket; 45. Rotating shaft 1; 46. Pulley 2; 47. Belt; 48. Tensioner; 49. Fixing belt; 50. Spring buckle; 51. Safety rope; 06. Clamping mechanism; 61. Motor; 62. Transmission shaft; 63. Bevel gear 1; 64. Rotating shaft 2; 65. Bevel gear 2; 66. Electric cylinder; 67. Clamp. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0021] Example 1

[0022] The utility model discloses a transmission line iron tower anti-falling device, comprising a backpack mechanism 01; further comprising a fixing mechanism 02, a protective mechanism 03, an anti-falling mechanism 04 and two groups of clamping mechanisms 06, wherein the fixing mechanism 02 is mounted on the backpack mechanism 01 and fixes the worker, the protective mechanism 03 is mounted on the backpack mechanism 01 and protects the worker's head, the anti-falling mechanism 04 is mounted on the backpack mechanism 01 and prevents the worker from falling, and the two groups of clamping mechanisms 06 are both mounted on the backpack mechanism 01 and serve as backups of the anti-falling mechanism 04, and are activated when the anti-falling mechanism 04 fails; the backpack mechanism 01 comprises a shell 11, a hinge 12, a carbon fiber door 13, a door lock 14, a rangefinder 15, a sponge pad 16 and a partition 17, and the shell 1 1 is provided with a cavity inside, a rope inlet is provided at the top of the shell 11 and an open mouth is provided at the front end of the shell 11, a hinge 12 is rotatably installed at the open mouth of the shell 11, a carbon fiber door 13 is installed on the hinge 12, a door lock 14 is installed on the carbon fiber door 13, a rangefinder 15 is installed on the left side wall of the shell 11, a sponge pad 16 is installed on the rear side wall of the shell 11, a partition 17 is installed in the cavity of the shell 11 and divides the cavity of the shell 11 into two upper and lower cavities, and a take-out port is provided on the left and right side walls of the shell 11 and communicates with the lower cavity of the shell 11; the shell 11 is also made of carbon fiber; the fixing mechanism 02 includes a waist safety belt 21, a safety belt buckle 22, and two sets of shoulder safety belts 23 and two sets of buckles 24, the waist safety belt 21 is installed on the shell 11, the safety belt buckle 22 is installed on the waist safety belt 21, the two sets of shoulder safety belts 23 are installed on the shell 11, and the two sets of buckles 24 are installed on the two sets of shoulder safety belts 23 respectively; the protection mechanism 03 includes a telescopic plate 31, a support plate 32, a safety helmet 33 and a telescopic belt 34, the bottom end of the telescopic plate 31 is connected to the top of the shell 11, the bottom end of the support plate 32 is connected to the top of the telescopic plate 31, the top of the safety helmet 33 is connected to the bottom of the support plate 32, and the telescopic belt 34 is installed on the safety helmet 33; the anti-fall mechanism 04 includes a battery 41, a servo motor 42, a pulley 43, a bracket 44, a rotating shaft 45, a leather Pulley 2 46, belt 47, tensioner 48, fixing belt 49, spring buckle 50 and safety rope 51, the bottom end of battery 41 is connected to the top end of partition 17, the bottom end of servo motor 42 is connected to the top end of partition 17, pulley 1 43 is installed on servo motor 42, bracket 44 is installed in the cavity of housing 11, shaft 1 45 is rotatably installed on bracket 44, pulley 2 46 is installed on shaft 1 45, belt 47 is tensioned and installed between pulley 1 43 and pulley 2 46, tensioner 48 is installed in the cavity of housing 11, fixing belt 49 is installed on shaft 1 45, one end of spring buckle 50 is fixedly installed on the top end of transmission line tower, and the other end of spring buckle 50 is connected to safety rope 51;When working, first, the worker places the relevant equipment in the lower cavity of the shell 11, passes the spring buckle 50 and the safety rope 51 through the rope inlet of the shell 11, and buckles the safety rope 51 on the fixing belt 49, then closes the carbon fiber door 13 and locks it through the door lock 14 to prevent the carbon fiber door 13 from opening naturally during the climbing process, and then the worker wears the waist safety belt 21 around the waist, and then passes the two sets of shoulder safety belts 23 through the shoulders and inserts the two sets of buckles 24 into the safety belt buckles 22, so as to fix the device on the worker, and adjusts the height of the support plate 32 and the safety helmet 33 by adjusting the telescopic degree of the telescopic plate 31, and the worker wears the safety helmet 33 on the head and fixes the safety helmet 33 on the head through the telescopic belt 34 to protect the head. In the process of the worker climbing up, the rangefinder 15 measures Measure the height from the ground, transmit the data to the servo motor 42, the battery 41 transmits power to the servo motor 42, the servo motor 42 rotates according to the data of the rangefinder 15, the servo motor 42 drives the pulley 1 43 to rotate, the pulley 1 43 drives the pulley 2 46 to rotate through the belt 47, the pulley 2 46 drives the shaft 1 45 to rotate, the shaft 1 45 drives the fixed belt 49 to rotate, the fixed belt 49 pulls the safety rope 51 and the spring buckle 50, so as to reel the spring buckle 50, and make the reeling speed of the spring buckle 50 match the climbing speed of the worker, when the rangefinder 15 detects a sharp drop in height, the clamping mechanism 06 is started, and the sponge pad 16 can make the worker's back more comfortable, and when it is necessary to take the relevant equipment, it can be taken through the taking port of the shell 11, which is convenient for the worker to work. ;

[0023] Example 2

[0024] like Figures 1 to 5As shown, a transmission line tower anti-falling device of the utility model is based on Example 1; the clamping mechanism 06 includes a motor 61, a transmission shaft 62, a bevel gear 1 63, a rotating shaft 2 64, a bevel gear 2 65, an electric cylinder 66 and a clamping plate 67, the motor 61 is installed in the cavity of the housing 11, the transmission shaft 62 is rotatably installed on the motor 61, the bevel gear 1 63 is installed on the transmission shaft 62, the rotating shaft 2 64 is rotatably installed in the cavity of the housing 11, the bevel gear 2 65 is installed on the rotating shaft 2 64, the electric cylinder 66 is installed on the rotating shaft 2 64, and the clamping plate 67 is installed on the electric cylinder 66, and the two sets of clamping mechanisms 06 are relatively installed and are respectively located on the left and right sides of the spring buckle 50. Right sides; when working, first, the worker places the relevant equipment in the lower cavity of the shell 11, passes the spring buckle 50 and the safety rope 51 through the rope inlet of the shell 11, and buckles the safety rope 51 on the fixing belt 49, then closes the carbon fiber door 13, and locks it through the door lock 14 to prevent the carbon fiber door 13 from opening naturally during the climbing process, and then the worker wears the waist safety belt 21 around the waist, and then passes the two sets of shoulder safety belts 23 through the shoulders and inserts the two sets of buckles 24 into the safety belt buckle 22, so as to fix the device on the worker, and adjusts the height of the support plate 32 and the safety helmet 33 by adjusting the telescopic degree of the telescopic plate 31, and the worker wears the safety helmet 33 on the head and through The retractable belt 34 fixes the safety helmet 33 on the head to protect the head. When the worker climbs up, the rangefinder 15 measures the height from the ground and transmits the data to the servo motor 42. The battery 41 transmits power to the servo motor 42. The servo motor 42 rotates according to the data of the rangefinder 15. The servo motor 42 drives the pulley 1 43 to rotate. The pulley 1 43 drives the pulley 2 46 to rotate through the belt 47. The pulley 2 46 drives the rotating shaft 1 45 to rotate. The rotating shaft 1 45 drives the fixed belt 49 to rotate. The fixed belt 49 pulls the safety rope 51 and the spring buckle 50, thereby winding the spring buckle 50 and making the winding speed of the spring buckle 50 and the climbing speed of the worker equal. In cooperation, when the rangefinder 15 detects a sharp drop in height, the electric cylinder 66 is started through an electrical signal, and the electric cylinder 66 pushes the clamping plate 67. The clamping plates 67 on the two sets of clamping mechanisms 06 cooperate to clamp the spring buckle 50. At the same time, the motor 61 is started, and the motor 61 drives the transmission shaft 62 to rotate. The transmission shaft 62 drives the bevel gear 1 63 to rotate, and the bevel gear 1 63 drives the bevel gear 2 65 to rotate. The bevel gear 2 65 drives the rotating shaft 2 64 and the electric cylinder 66 to rotate, and the electric cylinder 66 drives the clamping plate 67 and the spring buckle 50 to rotate, thereby enhancing the fixation of the spring buckle 50 to prevent workers from falling. When relevant equipment needs to be taken, it can be taken through the taking port of the shell 11, which is convenient for workers to work.

[0025] The servo motor 42 and the electric motor 61 of the utility model are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manuals, without the need for technicians in the field to make creative efforts.

[0026] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A transmission line tower anti-falling device, comprising a backpack mechanism (01); characterized in that: The invention also comprises a fixing mechanism (02), a protection mechanism (03), an anti-fall mechanism (04) and two sets of clamping mechanisms (06). The fixing mechanism (02) is installed on the backpack mechanism (01) and fixes the worker. The protection mechanism (03) is installed on the backpack mechanism (01) and protects the worker's head. The anti-fall mechanism (04) is installed on the backpack mechanism (01) and prevents the worker from falling. The two sets of clamping mechanisms (06) are installed on the backpack mechanism (01) and serve as backups for the anti-fall mechanism (04) and are activated when the anti-fall mechanism (04) fails.

2. A transmission line tower anti-falling device as claimed in claim 1, characterized in that: The backpack mechanism (01) comprises a shell (11), a hinge (12), a carbon fiber door (13), a door lock (14), a rangefinder (15), a sponge pad (16) and a partition (17). A cavity is arranged inside the shell (11). A rope inlet is provided at the top of the shell (11) and an open opening is provided at the front end of the shell (11). The hinge (12) is rotatably mounted at the open opening of the shell (11). The carbon fiber door (13) is mounted on the hinge (12). The door lock (14) is mounted on the carbon fiber door (13). The rangefinder (15) is mounted on the left side wall of the shell (11). The sponge pad (16) is mounted on the rear side wall of the shell (11). The partition (17) is mounted in the cavity of the shell (11) and divides the cavity of the shell (11) into two upper and lower cavities. The left and right side walls of the shell (11) are provided with access openings and are communicated with the lower cavity of the shell (11).

3. A transmission line tower anti-falling device as claimed in claim 2, characterized in that: The shell (11) is also made of carbon fiber material.

4. A transmission line tower anti-falling device as claimed in claim 2, characterized in that: The fixing mechanism (02) comprises a waist safety belt (21), a safety belt buckle (22), two groups of shoulder safety belts (23) and two groups of buckles (24); the waist safety belt (21) is mounted on a housing (11); the safety belt buckle (22) is mounted on the waist safety belt (21); the two groups of shoulder safety belts (23) are both mounted on the housing (11); and the two groups of buckles (24) are respectively mounted on the two groups of shoulder safety belts (23).

5. A transmission line tower anti-falling device as claimed in claim 2, characterized in that: The protective mechanism (03) comprises a telescopic plate (31), a support plate (32), a safety helmet (33) and a telescopic belt (34); the bottom end of the telescopic plate (31) is connected to the top end of the shell (11); the bottom end of the support plate (32) is connected to the top end of the telescopic plate (31); the top end of the safety helmet (33) is connected to the bottom end of the support plate (32); and the telescopic belt (34) is installed on the safety helmet (33).

6. A transmission line tower anti-falling device as claimed in claim 2, characterized in that: The anti-fall mechanism (04) comprises a storage battery (41), a servo motor (42), a pulley 1 (43), a bracket (44), a rotating shaft 1 (45), a pulley 2 (46), a belt (47), a tensioner (48), a fixing belt (49), a spring buckle (50) and a safety rope (51). The bottom end of the storage battery (41) is connected to the top end of the partition (17), the bottom end of the servo motor (42) is connected to the top end of the partition (17), the pulley 1 (43) is installed on the servo motor (42), and the bracket ( The invention relates to a transmission line transmission device comprising a first rotating shaft (44) and a second rotating shaft (45). The first rotating shaft (45) is rotatably mounted on the bracket (44). The second pulley (46) is mounted on the first rotating shaft (45). The belt (47) is tensioned and mounted between the first pulley (43) and the second pulley (46). The tensioner (48) is mounted in the cavity of the housing (11). The fixing belt (49) is mounted on the first rotating shaft (45). One end of the spring buckle (50) is fixedly mounted on the top of the transmission line tower. The other end of the spring buckle (50) is connected to a safety rope (51).

7. A transmission line tower anti-falling device as claimed in claim 6, characterized in that: The clamping mechanism (06) comprises a motor (61), a transmission shaft (62), a bevel gear one (63), a rotating shaft two (64), a bevel gear two (65), an electric cylinder (66) and a clamping plate (67). The motor (61) is mounted in a cavity of a housing (11). The transmission shaft (62) is rotatably mounted on the motor (61). The bevel gear one (63) is mounted on the transmission shaft (62). The rotating shaft two (64) is rotatably mounted in the cavity of the housing (11). The bevel gear two (65) is mounted on the rotating shaft two (64). The electric cylinder (66) is mounted on the rotating shaft two (64). The clamping plate (67) is mounted on the electric cylinder (66). Two sets of clamping mechanisms (06) are mounted opposite to each other and are respectively located on the left and right sides of the spring buckle (50).

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