Novel smart parking lot

Abstract

The invention discloses a novel intelligent parking lot which comprises a site, a plurality of parking spaces are drawn on the site, gates are arranged at an entrance and an exit of a main passage of the site, a plurality of monitoring assemblies are arranged on the site, and the monitoring assemblies are arranged in a scattered mode and arranged above the independent connected parking spaces respectively. The monitoring assembly is electrically connected with a control box on the site; the monitoring assembly comprises a supporting cable, a pulling rope, a camera shooting mechanism and two supports, the supporting cable and the pulling rope are arranged in parallel, the two ends of the supporting cable and the two ends of the pulling rope are connected with the two supports, and the camera shooting mechanism is adjustably arranged on the supporting cable; the monitoring assembly is arranged to monitor whether a vehicle is parked in a parking space in the parking lot or not in real time, the monitoring condition is transmitted to the control box, the control box puts the condition of an unoccupied parking space on the display screen, and then a driver is reminded to control the vehicle to drive to the unoccupied parking space; and the current situation that a long time is consumed to find an unoccupied parking space in the parking lot is changed.

Description

Technical Field

[0001] The present invention relates to the field of parking lots, and in particular to a novel smart parking lot. Background Art

[0002] The main purpose of building parking lots in different areas of the city is to park vehicles. Since there are multiple regularly distributed parking spaces in the parking lot, the parked vehicles can be arranged in an orderly manner. This operation reduces road traffic pressure, ensures vehicle safety, and provides convenience for car owners and passengers to carry out other activities, such as shopping, dining or working.

[0003] With the development of science and technology, the management of parking lots has gradually become intelligent. For example, by setting up gates and scanners at the entrances and exits of parking lots, vehicle information can be input into the control device by scanning the license plate number, and the control device notifies the gate to open so that vehicles can enter and exit the parking lot. At the same time, the number of vehicles parked in the parking lot can be counted, and later vehicles can be reminded whether there are vacant parking spaces in the parking lot. The above management method has been widely used in parking lots. For example, a Chinese patent with publication number CN107743641A discloses a method for managing parking lots, and the parking lot is set up for parking motor vehicles. The method includes the following steps: determining the maximum number of motor vehicles that can be parked in the parking lot; counting the motor vehicles that enter and leave; determining the number of motor vehicles that have been parked in the parking lot based on the counted motor vehicles; and determining the number of motor vehicles that can be additionally parked in the parking lot.

[0004] Although the above parking lot management method can count the number of vehicles parked in the parking lot, and calculate whether there are vacant parking spaces, and can remind later vehicles. However, when the later vehicles are reminded that there are vacant parking spaces in the parking lot, the later vehicles need to find the vacant parking spaces when they enter the parking lot. If the vacant parking space is located on the side of the main thoroughfare of the parking lot, the later vehicles cannot spend a long time to park. If the vacant parking space is far away from the main thoroughfare of the parking lot and the area of ​​the parking lot is large, it is very likely that the later vehicles will have to travel a long distance in the parking lot to find the vacant parking space, and even more so that multiple vehicles come in at the same time, and multiple vehicles are looking for vacant parking spaces at the same time. When the driver of a vehicle finds a vacant parking space, it is very likely that due to the long distance, when it drives to the vacant parking space, other vehicles have already parked. In this case, it greatly affects the driver's mood and even causes disputes. If the existing smart parking lot is added with real-time monitoring of whether there are vacant parking spaces, and the information of vacant parking spaces is projected on the display screen, and the above-mentioned status of taking a long time to find parking spaces is changed. Summary of the invention

[0005] The purpose of the present invention is to provide a new type of smart parking lot, aiming to improve the problem that drivers need to spend a long time looking for vacant parking spaces in the parking lot.

[0006] The present invention is implemented as follows: a new type of smart parking lot includes a site, multiple parking spaces are drawn on the site, gates are set at the entrances and exits of the main passage of the site, multiple groups of monitoring components are set on the site, the multiple groups of monitoring components are dispersedly arranged, and are respectively arranged above multiple independent contiguous parking spaces, and the monitoring components are electrically connected to the control box on the site; the monitoring components include a supporting cable, a pulling rope, a camera mechanism and two brackets, the supporting cable and the pulling rope are arranged in parallel, and both ends are connected to the two brackets, the camera mechanism is adjustably arranged on the supporting cable and connected to the pulling rope, and the pulling rope controls the camera mechanism to move back and forth along the supporting cable.

[0007] Preferably, a supporting mechanism is connected to both ends of the supporting cable and the pulling rope, and the supporting mechanism includes a supporting frame, a transverse plate, a first pulley and a second pulley. Three first pulleys are provided, and the three first pulleys are all provided on the supporting frame and distributed in the upper, middle and lower parts. The second pulley is provided at the end of the transverse plate, and the other end of the transverse plate is detachably connected to the supporting frame, and the supporting frame is connected to the bracket.

[0008] Preferably, the supporting cable comprises a first cable and a second cable, the two ends of the first cable are respectively supported on the upper first pulleys, the second cable is arranged below the first cable and contacts the two lower first pulleys in sequence, and the end is connected to the first cable.

[0009] Preferably, the pulling rope is arranged in an annular structure, and both ends are respectively mounted on the second pulleys, a motor is arranged below a second pulley, and the output shaft of the motor is connected to the central axis of the second pulley.

[0010] Preferably, the imaging mechanism comprises a camera, a top column is fixedly arranged on the top of the camera, the top column passes through the traveling mechanism, and a nut is threadedly sleeved on the end of the top column protruding from the traveling mechanism.

[0011] Preferably, the walking mechanism includes a chassis, a clamping plate, a frame and two limiting pulleys. The clamping plate is vertically arranged above the chassis and the top is detachably mounted on the frame. The frame is arranged as an H-shaped structure and is fixedly connected to one side of the pulling rope. The two limiting pulleys are respectively arranged at the upper and lower ends of the frame. The two limiting pulleys are both arranged between the first cable and the second cable, and the ends away from each other are in contact with the first cable and the second cable.

[0012] Preferably, limiting rods are hingedly provided at both upper and lower ends of the frame, the length of the two limiting rods is greater than the thickness of the limiting pulley, and the limiting rods are arranged adjacent to the limiting pulley, and the cable passes through the gap formed by the limiting rods and the pulley.

[0013] Preferably, a fastening mechanism is arranged on the side of the supporting mechanism, and the fastening mechanism includes a top plate, a threaded rod, a first splicing plate and a second splicing plate, the second splicing plate is detachably arranged on the first splicing plate, the threaded rod thread penetrates the second splicing plate, and the top is connected to the top plate through a bearing.

[0014] Preferably, a bottom plate is provided at the lower end of the bracket, and the top is arranged to be open, a first notch is provided on the side wall of the opening, a covering shell is provided above the bracket, a second notch is provided on the covering shell, and a connecting plate is provided at the bottom, the connecting plate is detachably connected to the bracket, and the second notch is opposite to the first notch; the top plate is detachably arranged at the upper end of the bracket, the first splicing plate and the second splicing plate are located in the bracket, and are in sliding contact with the side walls of the bracket.

[0015] Preferably, a through hole is provided on the first splicing plate, and an annular groove is provided on the upper side, the annular groove is located on the outside of the through hole, a bottom column is fixedly provided below the second splicing plate, and an annular groove is also provided on the lower side of the second splicing plate, threaded holes are provided on the bottom column and the second splicing plate, the bottom column extends into the through hole 732, and the threaded rod thread passes through the threaded hole; the end of the first cable is bent into a ring shape, and the ring is located in the space formed by the two annular grooves.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention is provided with a monitoring component to monitor in real time whether there are vehicles parked in the parking spaces in the parking lot, and transmit the monitoring situation to the control box, which projects the situation of vacant parking spaces on the display screen, thereby reminding the driver to control the vehicle to drive to the vacant parking space, changing the current situation where the driver spends a long time looking for vacant parking spaces in the parking lot.

[0018] 2. The present invention is provided with a supporting cable, which can realize stable support for the camera mechanism through the cooperation of the first cable and the second cable. Under the action of the pulling rope and the motor, the camera mechanism can be controlled to move back and forth on the supporting cable, thereby realizing the monitoring of the parking space. The fastening mechanism can force the supporting cable to be in a more taut state. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic structural diagram of an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of the structure of the monitoring component of the present invention;

[0021] Figure 3 It is a schematic diagram of the structure of the support of the present invention;

[0022] Figure 4 is a schematic structural diagram of the covering shell of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the support cable and the pulling rope of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the fastening mechanism of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the first splicing plate and the second splicing plate of the present invention;

[0026] Figure 8 It is a structural schematic diagram of the support mechanism of the present invention;

[0027] Fig. 9 It is a structural schematic diagram of the support mechanism and the support cable of the present invention;

[0028] Fig.10 It is a structural schematic diagram of the camera mechanism of the present invention;

[0029] Fig.11 It is a structural schematic diagram of the walking mechanism of the present invention.

[0030] In the figure: 1, site; 11, display screen; 12, control box; 13, gate machine; 2, monitoring component; 3, camera mechanism; 31, camera; 32, top column; 4, bracket; 41, bottom plate; 42, first gap; 43, open; 44, cover shell; 45, connecting plate; 46, second gap; 5, supporting cable; 51, first cable; 52, second cable; 53, ring; 6, pulling rope; 61, motor; 7 , fastening mechanism; 71, top plate; 72, threaded rod; 73, first splicing plate; 731, annular groove; 732, through hole; 74, second splicing plate; 741, threaded hole; 742, bottom column; 8, supporting mechanism; 81, supporting frame; 82, first pulley; 83, cross plate; 84, second pulley; 9, walking mechanism; 91, clamping plate; 92, chassis; 93, limiting pulley; 94, frame; 95, limiting rod. DETAILED DESCRIPTION

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0033] Example 1

[0034] It is recorded in the background technology that the existing smart parking lot can recognize the license plate and control the gate 13 to open to realize the entry and exit of the vehicle without human operation, and display whether there are vacant parking spaces in the parking lot. However, due to the large area of ​​the parking lot and the large number of parking spaces, it takes a long time for vehicles to find vacant parking spaces. In order to solve the above problems, this embodiment adds a monitoring component 2 to the existing smart parking lot, so that the monitoring component 2 can monitor many parking spaces and display the information of vacant parking spaces, so that vehicles can park in a shorter time.

[0035] like Figure 1 As shown, since the existing smart parking lot is easy to be widely used, it is a public existing technology. Here is a brief introduction to the existing smart parking lot. The smart parking lot includes a site 1, on which multiple parking spaces are drawn. The multiple parking spaces are divided into multiple opposing parking areas, and each parking area is distributed with multiple connected parking spaces. A main passage and multiple branch passages are distributed in the site 1. Gates 13 and cameras are set at the entrances and exits of the main passage. The gates 13 and the cameras are connected to a control device (such as a database server, an application server). When a vehicle drives to the gate 13, the camera recognizes the license plate number and inputs the license plate number into the control device (which can be set to a control box 12), and the control device controls the gate 13 to open and release the vehicle.

[0036] like Figure 1 As shown, multiple monitoring components 2 are set in the above-mentioned existing smart parking lot. Multiple groups of monitoring components 2 are dispersed and respectively set above multiple independent contiguous parking spaces. The monitoring components 2 are electrically connected to the control box 12, and the control box 12 is electrically connected to the display screen 11. The control box 12 is provided with a control system (such as a microcontroller or PLC), a sensor and actuator interface, a communication and network device (such as a network switch or router), a data storage and backup device (such as a hard disk), etc. Since the control box 12 is a prior art, it will not be described in detail here. The control box 12 controls the monitoring component 2 to work, monitors in real time whether there are vehicles parked in the parking spaces in the parking lot, and transmits the monitoring situation to the control box 12. The control box 12 projects the situation of the vacant parking spaces on the display screen 11, thereby reminding the driver to control the vehicle to drive to the vacant parking space, changing the current situation where it takes a long time to find vacant parking spaces in the parking lot.

[0037] like Figure 2 , Fig.10As shown, specifically, the monitoring component 2 includes a supporting cable 5, a pulling rope 6, a camera mechanism 3, two brackets 4, two groups of supporting mechanisms 8 and two groups of fastening mechanisms 7. The supporting cable 5 and the pulling rope 6 are arranged in parallel, and both ends are connected to the supporting mechanism 8. The supporting mechanism 8 is arranged on the bracket 4 by bolts. In addition, the end of the supporting cable 5 can also be connected to the fastening mechanism 7. The fastening mechanism 7 is installed on the bracket 4 and can control the supporting cable 5 to be in a straight state. The camera mechanism 3 includes a camera 31 and a walking mechanism 9. The camera 31 has the function of adjusting the direction. A top column 32 is fixedly arranged on the top of the camera 31. The top column 32 passes through the walking mechanism 9, and a nut is threadedly provided on the end of the top column 32 protruding from the walking mechanism 9. The walking mechanism 9 is movably arranged on the supporting cable 5. The pulling rope 6 is arranged in a ring shape, one side of which is connected to the walking mechanism 9, and can be controlled by the motor 61 to rotate forward and backward. Under the action of the motor 61, the walking mechanism 9 can be controlled to drive the camera 31 to move back and forth along the length direction of the supporting cable 5, and the camera 31 is controlled by the control box 12 to adjust the direction of the lens so as to monitor the parking space it is responsible for. The camera 31 transmits the monitoring information to the control box 12 by wireless or wired means, and the control box 12 then transmits the information to the display screen 11. In order to realize the operation of the camera 31, the power cord of the camera 31 can be combined with the pulling rope 6, or the power cord can be supported on the supporting cable 5, and the state of the power cord can be adjusted according to the movement of the camera 31. In short, when installing the monitoring component 2, the installation method of the power cord is determined according to the actual situation to make the camera 31 work.

[0038] like Figure 3 , Figure 6 , Figure 7 , Figure 8 , Fig. 9As shown, in order to stably support the monitoring assembly 2 through the action of the support cable 5, the support cable 5 includes a first cable 51 and a second cable 52 arranged in parallel up and down. The support mechanism 8 includes a support frame 81 and three first pulleys 82. The support frame 81 is connected to the bracket 4. The three first pulleys 82 are all arranged on the support frame 81 and are distributed in the upper, middle and lower parts. The spacing between the three first pulleys 82 can be adjusted according to actual needs, such as welding the support frame 81 on site. The two ends of the first cable 51 are respectively supported on the upper first pulley 82, and the second cable 52 contacts the two lower first pulleys 82 in turn, and the end is connected to the first cable 51. In addition, the fastening mechanism 7 includes a top plate 71, a threaded rod 72, a first splicing plate 73 and a second splicing plate 74, the second splicing plate 74 is connected by bolts and can be detachably arranged on the first splicing plate 73, the first splicing plate 73 and the second splicing plate 74 are both provided with annular grooves 731 on the adjacent sides, the threaded rod 72 is threadedly penetrated through the second splicing plate 74, and the top is connected by a bearing and penetrates the top plate 71. The top of the bracket 4 is set as an opening 43, the side wall of the opening 43 is provided with a first notch 42, the top plate 71 is connected by bolts and can be detachably arranged on the upper end of the bracket 4, the first splicing plate 73 and the second splicing plate 74 are located in the bracket 4, and are in sliding contact with the side wall of the bracket 4. When installing the support cable 5, firstly wind the first cable 51 and the second cable 52 on the first pulley 82, and then use the cable connecting device to connect the first cable 51 and the second cable 52, and set the end of the first cable 51 through the notch and bend it into a ring 53, and place the ring 53 in the space formed by the two annular grooves 731, and use the bolts to make the first splicing plate 73 and the second splicing plate 74 close to each other and squeeze the first cable 51, so that the first cable 51 is stably connected relative to the fastening mechanism 7. The fastening mechanism 7 is installed on the top of the bracket 4, so the first splicing plate 73 and the second splicing plate 74 can be controlled by rotating the threaded rod 72 to drive the end of the first cable 51 to move, and then control the first cable 51 and the second cable 52 to be tightened. Because the first splicing plate 73 and the second splicing plate 74 are in sliding contact with the bracket 4, the fastening mechanism 7 can be stably installed relative to the bracket 4.

[0039] like Figure 5 , Figure 8 As shown, in order to stably arrange the pulling rope 6 on the side of the supporting cable 5, the supporting mechanism 8 further includes a second pulley 84 and a transverse plate 83. The second pulley 84 is arranged at the end of the transverse plate 83, and the other end of the transverse plate 83 is detachably connected to the supporting frame 81. The two ends of the pulling rope 6 are respectively sleeved on the second pulleys 84. A motor 61 is arranged below one of the second pulleys 84, and the output shaft of the motor 61 is connected to the central axis of the second pulley 84.

[0040] like Figure 6 , Figure 7As shown, in order to ensure that the first splicing plate 73 and the second splicing plate 74 are stably connected, a through hole 732 is provided on the first splicing plate 73, and the annular groove 731 is located on the outer side of the through hole 732. A bottom column 742 is fixedly provided below the second splicing plate 74, and threaded holes 741 are provided on the bottom column 742 and the second splicing plate 74. The bottom column 742 extends into the through hole 732, and the threaded rod 72 is threadedly penetrated through the threaded hole 741, thereby realizing that the threaded rod 72 is threadedly connected to the first splicing plate 73 and the second splicing plate 74.

[0041] like Fig.10 , Fig.11 As shown, in order to stably install the camera 31 on the supporting cable 5, the walking mechanism 9 includes a chassis 92, a clamping plate 91, a frame 94 and two limiting pulleys 93. The clamping plate 91 is vertically arranged above the chassis 92, and the top is connected by bolts and can be detachably mounted on the frame 94. The frame 94 is arranged as an H-shaped structure and is fixedly connected to one side of the pulling rope 6. The two limiting pulleys 93 are respectively arranged at the upper and lower ends of the frame 94. The two limiting pulleys 93 are both arranged between the first cable 51 and the second cable 52, and the ends away from each other are in contact with the first cable 51 and the second cable 52. Therefore, with the cooperation of the two limiting pulleys 93, the walking mechanism 9 is stably and movably arranged between the first cable 51 and the second cable 52, and the camera 31 is stably placed. In order to make the walking mechanism 9 placed more stably, limiting rods 95 are hingedly provided at the upper and lower ends of the frame 94. The length of the two limiting rods 95 is greater than the thickness of the limiting pulley 93, and the limiting rods 95 are arranged near the limiting pulley 93. The cable passes through the gap formed by the limiting rods 95 and the pulley. Under the action of the limiting rods 95, the position of the cable relative to the limiting pulley 93 is limited to avoid relative deviation under the action of external force.

[0042] Example 2

[0043] like Figure 3 , Figure 4 As shown, on the basis of Example 1, a bottom plate 41 is provided at the lower end of the bracket 4, a first notch 42 is provided on the side wall of the opening 43, a cover shell 44 is provided above the bracket 4, a second notch 46 is provided on the cover shell 44, and a connecting plate 45 is provided at the bottom, the connecting plate 45 is detachably connected to the bracket 4, and the second notch 46 is opposite to the first notch 42. The notch is provided to facilitate the installation of the cable through the bracket 4, and the cover shell 44 is provided to cover the top of the bracket 4 to prevent rainwater from entering the bracket 4 and accelerating its corrosion.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A new type of intelligent parking lot, comprising a site (1), on which a plurality of parking spaces are drawn, and gates (13) are arranged at the entrance and exit of the main passage of the site (1), characterized in that: A plurality of monitoring components (2) are arranged on the site (1). The plurality of monitoring components (2) are dispersedly arranged and respectively arranged above a plurality of independent contiguous parking spaces. The monitoring components (2) are electrically connected to a control box (12) on the site (1). The monitoring components (2) include a supporting cable (5), a pulling rope (6), a camera mechanism (3) and two brackets (4). The supporting cable (5) and the pulling rope (6) are arranged in parallel and both ends are connected to the two brackets (4). The camera mechanism (3) is adjustably arranged on the supporting cable (5) and connected to the pulling rope (6). The pulling rope (6) controls the camera mechanism (3) to move back and forth along the supporting cable (5).

2. A new type of smart parking lot according to claim 1, characterized in that: A support mechanism (8) is connected to both ends of the support cable (5) and the pulling rope (6), and the support mechanism (8) includes a support frame (81), a transverse plate (83), a first pulley (82) and a second pulley (84). Three first pulleys (82) are provided, and the three first pulleys (82) are all provided on the support frame (81) and are distributed in the upper, middle and lower parts. The second pulley (84) is provided at the end of the transverse plate (83), and the other end of the transverse plate (83) is detachably connected to the support frame (81), and the support frame (81) is connected to the bracket (4).

3. A new type of smart parking lot according to claim 2, characterized in that: The supporting cable (5) comprises a first cable (51) and a second cable (52), wherein both ends of the first cable (51) are respectively supported on the upper first pulley (82), and the second cable (52) is arranged below the first cable (51) and contacts the two lower first pulleys (82) in sequence, while the end portion is connected to the first cable (51).

4. A new type of smart parking lot according to claim 3, characterized in that: The pulling rope (6) is arranged in an annular structure, and both ends are respectively mounted on the second pulleys (84). A motor (61) is arranged below one of the second pulleys (84), and the output shaft of the motor (61) is connected to the central axis of the second pulley (84).

5. A new type of smart parking lot according to claim 4, characterized in that: The camera mechanism (3) comprises a camera (31), a top column (32) is fixedly arranged on the top of the camera (31), the top column (32) passes through the walking mechanism (9), and a nut is threadedly sleeved on the end of the top column (32) protruding from the walking mechanism (9).

6. A new type of smart parking lot according to claim 5, characterized in that: The walking mechanism (9) comprises a chassis (92), a clamping plate (91), a frame (94) and two limiting pulleys (93); the clamping plate (91) is vertically arranged above the chassis (92), and the top is detachably mounted on the frame (94); the frame (94) is arranged in an H-shaped structure and is fixedly connected to one side of the pulling rope (6); the two limiting pulleys (93) are respectively arranged at the upper and lower ends of the frame (94); the two limiting pulleys (93) are both arranged between the first cable (51) and the second cable (52), and the ends away from each other are in contact with the first cable (51) and the second cable (52).

7. A new type of smart parking lot according to claim 6, characterized in that: Limiting rods (95) are hingedly arranged at both upper and lower ends of the frame (94), the length of the two limiting rods (95) is greater than the thickness of the limiting pulley (93), and the limiting rods (95) are arranged adjacent to the limiting pulley (93), and the cable is arranged to pass through the gap formed by the limiting rods (95) and the pulley.

8. According to claim 3, a new type of smart parking lot is characterized in that: A fastening mechanism (7) is arranged on the side of the support mechanism (8), and the fastening mechanism (7) comprises a top plate (71), a threaded rod (72), a first splicing plate (73) and a second splicing plate (74), wherein the second splicing plate (74) is detachably arranged on the first splicing plate (73), the threaded rod (72) is threadedly penetrated through the second splicing plate (74), and the top is connected to the top plate (71) through a bearing.

9. A new type of smart parking lot according to claim 8, characterized in that: The lower end of the bracket (4) is provided with a bottom plate (41), and the top is provided with an opening (43), a first notch (42) is provided on the side wall of the opening (43), a covering shell (44) is provided above the bracket (4), a second notch (46) is provided on the covering shell (44), and a connecting plate (45) is provided at the bottom, the connecting plate (45) is detachably connected to the bracket (4), and the second notch (46) is opposite to the first notch (42); the top plate (71) is detachably provided at the upper end of the bracket (4), the first splicing plate (73) and the second splicing plate (74) are located in the bracket (4) and are in sliding contact with the side wall of the bracket (4).

10. A new type of intelligent parking lot according to claim 9, characterized in that: The first splicing plate (73) is provided with a through hole (732), and an annular groove (731) is provided on the upper side, and the annular groove (731) is located on the outer side of the through hole (732); a bottom column (742) is fixedly provided below the second splicing plate (74), and an annular groove (731) is also provided on the lower side of the second splicing plate (74); threaded holes (741) are provided on the bottom column (742) and the second splicing plate (74), and the bottom column (742) extends into the through hole (732), and the threaded rod (72) is threadedly inserted through the threaded hole (741); the end of the first cable (51) is bent into a ring shape, and the ring is located in the space formed by the two annular grooves (731).

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