Hanging basket steel plate sling limiting device

Abstract

The invention provides a hanging basket steel plate sling limiting device, and relates to the technical field of continuous beam cantilever casting auxiliary tools, the hanging basket steel plate sling limiting device comprises a steel plate sling, a clamping plate, a working pin and a limiting assembly; the limiting assembly comprises a placing plate, a supporting plate and fixing plates, the supporting plate is arranged at the lower end of the placing plate, fixing assemblies for connecting the supporting plate and the clamping plates are arranged in the supporting plate, the two fixing plates are symmetrically arranged, connecting pipes are connected to the outer sides of the fixing plates, and the ends, away from the fixing plates, of the connecting pipes are connected with moving plates which are connected with fixing rods; an inner rod is elastically arranged in the fixing rod, one end of the inner rod extends out of the fixing rod and is fixedly provided with a limiting plate, through holes for the limiting plate to penetrate through are correspondingly formed in the clamping plate and the fixing plate, and a control assembly for controlling the connecting pipe to move in the direction perpendicular to the fixing plate is arranged on the fixing plate. The invention solves the problems that the sling is not positioned in the middle of a working pin, so that the distribution of load on the sling is influenced, the deflection of a hanging system is further caused, and local overload or uneven stress is caused.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary tools for cantilever casting of continuous beams, and particularly relates to a limit device for steel plate slings of a hanging basket. Background Art

[0002] As the most common process in continuous beam construction, the cantilever casting construction of a hanging basket for a suspended casting beam is widely used in long-span bridges and is a common construction process. The hanging basket mainly includes a main truss structure, a rear anchor and a walking system, a suspension system, a bottom basket system, a formwork system, etc. Among them, the rear sling of the bottom basket in the hanging members of the bottom basket system is anchored on the bottom slab of the already cast section, and holes are reserved during the casting of the bottom slab. When the hanging basket walks, the anchor is released, and the adjustment can be achieved through the cooperation of a working pin, a sling hole and a limit device. However, if the sling is not in the middle position of the working pin, it will affect the distribution of the load on the sling, and then cause the deflection of the hanging system, resulting in local overload or uneven stress. Summary of the Invention

[0003] Aiming at the deficiencies in the prior art, the present invention provides a limit device for steel plate slings of a hanging basket, which solves the problem that if the sling is not in the middle position of the working pin, it will affect the distribution of the load on the sling, and then cause the deflection of the hanging system, resulting in local overload or uneven stress.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A limit device for steel plate slings of a hanging basket, comprising: a steel plate sling, clamping plates, a working pin and a limit component;

[0006] There are two clamping plates, which are respectively arranged on both sides of the steel plate sling, and the two clamping plates can be fixed on the side of the steel plate sling through the working pin;

[0007] The limit component includes a placement plate, a support plate and a fixing plate. The placement plate is arranged vertically, the support plate is arranged horizontally at the lower end of the placement plate, one end of the support plate is fixed to the placement plate, the support plate is located between the bottoms of the two clamping plates, a fixing component for connecting the support plate and the clamping plates is arranged in the support plate, there are two fixing plates, the two fixing plates are symmetrically arranged at the left and right ends on the same side of the placement plate and the fixing plates extend into the space between the two clamping plates, a connecting pipe is connected to the outer side of the fixing plate, a moving plate is vertically and fixedly connected to the end of the connecting pipe away from the fixing plate, a fixing rod is fixedly connected to the side of the moving plate close to the fixing plate, an inner rod is elastically arranged along the length direction of the fixing rod in the fixing rod, one end of the inner rod extends out of the fixing rod and is fixed with a limit plate, through holes for the limit plate to pass through are correspondingly formed on both the clamping plate and the fixing plate, and a control component for controlling the connecting pipe to move in a direction perpendicular to the fixing plate is arranged on the fixing plate.

[0008] Preferably, the control assembly includes a rotating rod, a gear, and a toothed plate. The surface of the rotating rod is provided with external threads, and the connecting pipe is threadedly connected to the outside of the rotating rod. The rotating rod is rotationally connected to the fixed plate along the axial direction of the rotating rod. One end of the rotating rod passes through the fixed plate and is coaxially connected to the gear. A toothed plate is elastically arranged on the side wall of the placement plate in the vertical direction. The toothed plate meshes with the gear. When the toothed plate moves downward, it drives the connecting pipe to move towards the fixed plate.

[0009] Preferably, the other end of the inner rod slides out of the fixed rod and passes through the moving plate and then is connected to a pulling block. A first spring is sleeved outside the fixed rod, and both ends of the first spring are fixedly connected to the limiting plate and the moving plate respectively.

[0010] Preferably, the side cross-section of the toothed plate is in the shape of a similar "L", including a horizontal plate portion and a vertical plate portion that are perpendicularly connected to each other. The teeth of the toothed plate are arranged on the vertical plate portion. A groove is formed on the surface of the placement plate, and the vertical plate portion is slidably arranged in the groove in the vertical direction. A telescopic rod is arranged between the lower surface of the toothed plate and the inner wall of the groove, and a second spring is sleeved on the surface of the telescopic rod.

[0011] Preferably, a first sliding groove is arranged on the side wall of the groove, and a first sliding block is fixed on the side wall of the vertical plate portion. The first sliding block is slidably connected in the first sliding groove.

[0012] Preferably, there are two limiting components, and the two limiting components are symmetrically arranged on both sides of the working pin.

[0013] Preferably, a transmission chamber is arranged inside the support plate. The fixing assembly includes a motor, a threaded rod, a threaded pipe, and a fixing block. The motor is arranged in the transmission chamber. The output end of the motor is coaxially connected to the screw rod. The threaded pipe is threadedly connected to one end of the threaded rod. The end of the threaded pipe away from the threaded rod is fixedly connected to the fixing block. A transmission groove is arranged on the inner wall of the transmission chamber. A second sliding block is fixedly connected to the threaded pipe, and the second sliding block is slidably connected in the transmission groove along the length direction of the threaded rod. An opening communicating with the transmission chamber is arranged on the side of the support plate. A fixing groove is formed on the clamping plate, and the fixing block can be clamped in the fixing groove.

[0014] Preferably, there is one motor, and the motor is a double-shaft motor, and the thread directions of the threaded rods connected to the two output shafts are opposite.

[0015] Preferably, one end of the fixed block away from the threaded pipe is connected to a circular end fixing plate. A first hinge block is fixed on the end fixing plate and on the side of the fixed block. A long groove is arranged on the fixed block along the length direction of the threaded rod. A second hinge block is slidably connected in the long groove. A first connecting rod is hinged to the first hinge block. One end of the first connecting rod not connected to the first hinge block is hinged to a second connecting rod. The second connecting rod is hinged to the second hinge block. A third spring is sleeved on the fixed block. When the second hinge block is located at the end of the long groove away from the end fixing plate, the third spring is located between the end fixing plate and the second hinge block. An arc-shaped inner wall is arranged in the fixed groove. When the fixed block is clamped in the fixed groove, the hinged part of the first connecting rod and the second connecting rod abuts against the arc-shaped inner wall.

[0016] Preferably, the diameter of the end fixing plate is smaller than the diameter of the opening hole and smaller than the diameter of the notch of the fixed groove.

[0017] The present invention has the following beneficial effects:

[0018] Through the limiting component, the present invention can limit the steel plate sling to the middle position of the working pin, so that the load distribution on the steel plate sling is more uniform, which helps to reduce the risk of local overload. It can also effectively support the installation of the steel plate sling, the splint and the working pin, making the adjustment and limitation process of the steel plate sling proceed smoothly, avoiding operation failure caused by the sling not being centered. At the same time, by ensuring that the steel plate sling is always in the middle position, the contact with other components can be reduced, thereby reducing the probability of wear and damage and prolonging the service life of the steel plate sling and other related components.

[0019] Other advantages, objectives and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present invention. Brief Description of the Drawings

[0020] Figure 1 is a three-dimensional structural schematic diagram of the present invention;

[0021] Figure 2 is a top view schematic diagram of the overall structure of the present invention;

[0022] Figure 3 is a connection schematic diagram of the splint and the working pin of the present invention;

[0023] Figure 4 is a three-dimensional structural schematic diagram of the limiting component of the present invention;

[0024] Figure 5 is a partial structural cross-sectional schematic diagram of the limiting component of the present invention;

[0025] Figure 6 is a side cross-sectional structural schematic diagram of the limiting component of the present invention;

[0026] Figure 7 Schematic diagram of the fixed component structure of the present invention;

[0027] Figure 8 Partial schematic diagram of the fixed component structure of the present invention;

[0028] Figure 9 Schematic diagram of the state during the clamping process of the fixing block of the present invention;

[0029] Figure 10 Schematic diagram of the state after the fixing block of the present invention is clamped.

[0030] In the above-mentioned drawings: 1. Steel plate sling; 2. Splint; 202. Fixed groove; 3. Working pin; 4. Limiting component; 41. Placing plate; 42. Support plate; 43. Fixed plate; 44. Rotating rod; 46. Tooth plate; 47. Gear; 45. Connecting pipe; 48. Moving plate; 49. Fixed rod; 491. Inner rod; 492. Pulling block; 410. Limiting plate; 412. Telescopic rod; 413. Transmission bin; 414. First slider; 5. Fixed component; 51. Motor; 53. Threaded rod; 54. Threaded pipe; 55. Fixed block; 551. End fixing plate; 57. Second slider; 6. Through hole; 7. First spring; 8. Second spring; 91. First hinge block; 92. Second hinge block; 93. First connecting rod; 94. Second connecting rod; 95. Third spring. Specific embodiments

[0031] In order to make the technical means, creative features, achieved purposes and functions of the present invention clearer and easier to understand, the technical solutions in the present invention will be further described below with reference to the drawings and embodiments.

[0032] Please refer to Figures 1 to 10As shown in the figure, a limit device for the steel plate sling of a hanging basket includes: a steel plate sling 1, clamping plates 2, a working pin 3, and a limit component 4; there are two clamping plates 2, which are respectively arranged on both sides of the steel plate sling 1, and the two clamping plates 2 can be fixed to the side of the steel plate sling 1 through the working pin 3; the limit component 4 includes a placement plate 41, a support plate 42, and a fixing plate 43. The placement plate 41 is arranged vertically, the support plate 42 is horizontally arranged at the lower end of the placement plate 41, one end of the support plate 42 is fixed to the placement plate 41, the support plate 42 is located between the bottoms of the two clamping plates 2, and a fixing component 5 for connecting the support plate 42 and the clamping plate 2 is arranged in the support plate 42. There are two fixing plates 43, which are symmetrically arranged at the left and right ends on the same side of the placement plate 41, and the fixing plates 43 extend into the space between the two clamping plates 2. A connecting pipe 45 is connected to the outer side of the fixing plate 43. One end of the connecting pipe 45 away from the fixing plate 43 is vertically and fixedly connected to a moving plate 48. A fixing rod 49 is fixedly connected to the side of the moving plate 48 close to the fixing plate 43. An inner rod 491 is elastically arranged along the length direction of the fixing rod 49 in the fixing rod 49. One end of the inner rod 491 extends out of the fixing rod 49 and is fixed with a limit plate 410. Through holes 6 for the limit plate 410 to pass through are correspondingly formed on both the clamping plate 2 and the fixing plate 43. A control component for controlling the movement of the connecting pipe 45 along the direction perpendicular to the fixing plate 43 is arranged on the fixing plate 43.

[0033] When the working pin 3 fixes the clamping plate 2, it passes through the clamping plate 2, which is a prior art and will not be elaborated. The technology of the present invention lies in the limiting effect of the limit component 4 on the steel plate sling 1, making it located in the middle position. Specifically, the support plate 42 and the clamping plate 2 can be clamped through the fixing component 5, so as to connect the limit component 4 and the clamping plate 2. Through the fixing component 5, the limit component 4 can be fixed to the side of the clamping plate 2, ensuring that it remains stable during the hanging process and is not prone to deviation or displacement, thereby improving the overall stability of the hanging system. And by precisely fixing the limit component 4, the matching accuracy between the limit component 4 and the working pin 3 can be greatly improved, enabling the limit device to effectively play its adjustment and limitation roles, and ensuring that the steel plate sling 1 is in the middle position of the working pin 3.

[0034] When the control component controls the connecting pipe 45 to move towards the fixing plate 43, it drives the moving plate 48 to move towards the clamping plate 2, so that the through holes 6 on the clamping plate 2 and the fixing plate 43 are in coaxial positions. After the limiting plate 410 passes through the through holes 6 on the clamping plate 2 and the fixing plate 43, it can contact the steel plate sling 1. The structures on the two fixing plates 43 are symmetrical, that is, the two limiting plates 410 are respectively located on both sides of the steel plate sling 1. The two limiting plates 410 move towards each other and jointly act on the steel plate sling 1 to limit the steel plate sling 1; to improve stability, two connecting pipes 45 and two fixing rods 49 are arranged on each moving plate 48; an inner rod 491 is elastically arranged on the fixing rod 49, so that the limiting plate 410 on the inner rod 491 can be closely attached to the steel plate sling 1; through the limiting component 4, the steel plate sling 1 can be limited to the middle position of the working pin 3, so that the load is more evenly distributed on the steel plate sling 1, which helps to reduce the risk of local overload, and can also effectively support the installation of the steel plate sling 1, the clamping plate 2 and the working pin 3, making the adjustment and limitation process of the steel plate sling 1 proceed smoothly, avoiding operation failure caused by misalignment. At the same time, by ensuring that the steel plate sling 1 is always in the middle position, the contact with other components can be reduced, thereby reducing the probability of wear and damage and prolonging the service life of the steel plate sling 1 and other related components.

[0035] Further, as Figure 1 , Figure 2 , Figure 4 and Figure 6 shown, the control component includes a rotating rod 44, a gear 47 and a toothed plate 46. The surface of the rotating rod 44 is provided with external threads. The connecting pipe 45 is threadedly connected outside the rotating rod 44. The rotating rod 44 is rotatably connected to the fixing plate 43 along the axial direction of the rotating rod 44. One end of the rotating rod 44 passes through the fixing plate 43 and is coaxially connected to the gear 47. The side wall of the placing plate 41 is elastically provided with a toothed plate 46 in the vertical direction. The toothed plate 46 meshes with the gear 47. When the toothed plate 46 moves downward, it drives the connecting pipe 45 to move towards the fixing plate 43. When the toothed plate 46 moves downward, it drives the gear 47 to rotate, so that the rotating rod 44 rotates. The connecting pipe 45 is provided with internal threads that cooperate with the external threads on the rotating rod 44. The elastically arranged inner rod 491 will pass through the through hole 6 under the action of elastic force. The inner rod 491 is connected to the moving plate 48 through the fixing rod 49, and the connecting pipe 45 is also connected to the moving plate 48, restricting the rotation of the connecting pipe 45, so that the connecting pipe 45 moves along the length direction of the rotating rod 44, thereby realizing the movement control of the connecting pipe 45.

[0036] Further, as Figure 2 , Figure 4 and Figure 5As shown, the other end of the inner rod 491 slides out of the fixed rod 49 and passes through the moving plate 48 and then is connected to the pulling block 492. A first spring 7 is sleeved outside the fixed rod 49, and both ends of the first spring 7 are fixedly connected to the limiting plate 410 and the moving plate 48 respectively. By setting the pulling block 492, before the steel plate sling 1 is placed between the two clamping plates 2, the pulling block 492 can be pulled to compress the first spring 7, so that the two limiting plates 410 on both sides of the clamping plate 2 move away from each other, avoiding interference with the placement of the steel plate sling 1; after placement, the pulling block 492 is released, the first spring 7 restores its deformation, drives the moving plate 48 to move through the control connecting pipe 45, so that the limiting plate 410 contacts the steel plate sling 1, and then the moving plate 48 is controlled to continue to move, and the first spring 7 is compressed again. The inner rod 491 will slide relative to the fixed rod 49, and during this process, the limiting plate 410 always contacts the steel plate sling 1 until one side of the limiting plate 410 contacts the fixed rod 49 and the inner rod 491 can no longer move. At this time, the limiting plate 410 reliably abuts against the steel plate sling 1 to limit the steel plate sling 1.

[0037] Further, as Figure 6 shown, the side cross-section of the toothed plate 46 is in a shape similar to "L", including a horizontal plate portion and a vertical plate portion that are perpendicularly connected. The teeth of the toothed plate 46 are arranged on the vertical plate portion. A groove is formed on the surface of the placing plate 41, and the vertical plate portion is slidably arranged in the groove in the vertical direction. A telescopic rod 412 is arranged between the lower surface of the toothed plate 46 and the inner wall of the groove, and a second spring 8 is sleeved on the surface of the telescopic rod 412. By setting the second spring 8, the toothed plate 46 can slide in the groove under the action of elastic force. Specifically, the telescopic rod 412 includes a telescopic inner rod and a telescopic outer rod. The bottom of the telescopic outer rod is fixedly connected to the groove, the lower end of the telescopic inner rod is slidably connected inside the telescopic outer rod, and the upper end extends outside the telescopic outer rod and is fixedly connected to the toothed plate 46.

[0038] Further, as Figure 2 shown, in order to limit the sliding of the toothed plate 46, a first sliding groove is arranged on the side wall of the groove, and a first sliding block 414 is fixedly connected to the side wall of the vertical plate portion. The first sliding block 414 is slidably connected in the first sliding groove. In order to improve stability, first sliding blocks 414 are arranged at both the left and right ends of the toothed plate 46.

[0039] Further, as Figure 2 shown, there are two limiting components 4, and the two limiting components 4 are symmetrically arranged on both sides of the working pin 3.

[0040] Further, as Figure 3 、 Figure 4 、 Figures 6 to 10As shown, a transmission chamber 413 is provided inside the support plate 42. The fixing assembly 5 includes a motor 51, a threaded rod 53, a threaded tube 54, and a fixing block 55. The motor 51 is arranged inside the transmission chamber 413. The output end of the motor 51 is coaxially connected to the threaded rod 53. The threaded tube 54 is threadedly connected to one end of the threaded rod 53. The end of the threaded tube 54 away from the threaded rod 53 is fixedly connected to the fixing block 55. A transmission groove is provided on the inner wall of the transmission chamber 413. A second slider 57 is fixedly connected to the threaded tube 54. The second slider 57 is slidably connected in the transmission groove along the length direction of the threaded rod 53. An opening communicating with the transmission chamber 413 is provided on the side of the support plate 42. A fixing groove 202 is provided in the clamping plate 2. The fixing block 55 can be clamped in the fixing groove 202. The threaded tube 54 is provided with a thread that cooperates with the threaded rod 53. The second slider 57 is provided to limit the threaded tube 54 connected thereto to only move along the length direction of the threaded rod 53. When the motor 51 is turned on, it drives the threaded rod 53 to rotate, so that the threaded tube 54 can drive the fixing block 55 to extend out of the transmission chamber 413 and be clamped in the fixing groove 202.

[0041] Further, as Figure 7 shown, there is one motor 51. The motor 51 is a double-shaft motor, and the thread directions of the threaded rods 53 connected to the two output shafts are opposite. This can make the threaded tubes 54 on the two threaded rods 53 move towards each other, so as to realize one motor 51 controlling two threaded tubes 54 and simultaneously controlling the fixing blocks 55 to be clamped in the fixing grooves 202.

[0042] Further, as Figures 8 to 10As shown in the figure, one end of the fixed block 55 away from the threaded pipe 54 is connected to a circular end fixing plate 551. A first hinge block 91 is fixed on the end fixing plate 551 and on the side of the fixed block 55. A long groove is provided on the fixed block 55 along the length direction of the threaded rod 53. A second hinge block 92 is slidably connected in the long groove. The first hinge block 91 is hinged to a first connecting rod 93. One end of the first connecting rod 93 not connected to the first hinge block 91 is hinged to a second connecting rod 94. The second connecting rod 94 is hinged to the second hinge block 92. A third spring 95 is sleeved on the fixed block 55. When the second hinge block 92 is located at the end of the long groove away from the end fixing plate 551, the third spring 95 is located between the end fixing plate 551 and the second hinge block 92. An arc-shaped inner wall is provided in the fixed groove 202. When the fixed block 55 is clamped in the fixed groove 202, the hinged part of the first connecting rod 93 and the second connecting rod 94 abuts against the arc-shaped inner wall. There are two first hinge blocks 91, second hinge blocks 92, first connecting rods 93 and second connecting rods 94; when the fixed block 55 extends out of the opening or extends into the fixed groove 202, the first connecting rod 93 is squeezed by the opening or the notch of the fixed groove 202, so that the two first connecting rods 93 rotate towards the direction close to the fixed block 55. At this time, the second connecting rod 94 also rotates under the influence of the first connecting rod 93, thereby driving the second hinge block 92 to slide towards the direction close to the end fixing plate 551 and compressing the third spring 95; when entering the fixed groove 202, the first connecting rod 93 is no longer restricted. Under the elastic force of the third spring 95, the second hinge block 92 moves away from the end fixing plate 551. At this time, the hinged part of the first connecting rod 93 and the second connecting rod 94 abuts against the arc-shaped inner wall.

[0043] Further, the diameter of the end fixing plate 551 is smaller than the diameter of the opening and smaller than the diameter of the notch of the fixed groove 202. This facilitates the smooth passage of the end fixing plate 551.

[0044] Working principle:

[0045] First, the staff places the device at the designated position and makes the fixing plate 43 fit with the clamping plate 2. Then the staff pulls the inner rod 491 to drive the limit plate 410 fixed at one end of it to move synchronously. When the limit plate 410 is aligned with the through hole 6 on the surface of the clamping plate 2, the staff releases the inner rod 491. Under the resilience of the first spring 7, the limit plate 410 penetrates through the through hole 6; subsequently, control the operation of the motor 51. The motor 51 drives the threaded rod 53 to rotate, and the threaded pipe 54 moves, thereby driving the fixed block 55 fixed at one end of the threaded pipe 54 to move. When the fixed block 55 is clamped in the fixed groove 202, control the motor 51 to stop operating.

[0046] Then, the staff moves the steel plate sling 1 to the middle of the splint 2 through the hoisting equipment, and makes the steel plate sling 1 move downward. At the same time, the position of the limit plate 410 is adjusted to avoid interfering with the steel plate sling 1. When the lower end of the steel plate sling 1 passes over the limit plate 410, under the resilience of the first spring 7, the limit plate 410 can pass through the through hole 6 and fit against the side of the steel plate sling 1. As the steel plate sling 1 gradually moves downward, the lower end of the steel plate sling 1 contacts the cross plate part of the toothed plate 46 and drives the toothed plate 46 to move downward. During the movement of the toothed plate 46, the gear 47 is driven to rotate. The gear 47 drives the rotating rod 44 to rotate, and the rotating rod 44 drives the connecting pipe 45 to move, thereby driving the moving plate 48 fixed at one end of the connecting pipe 45 to move. While the moving plate 48 moves, it can drive the fixed rod 49 to move, thereby squeezing the first spring 7, so that the steel plate sling 1 can be kept in the middle position; when the steel plate sling 1 moves to the designated position, the staff fixes the steel plate sling 1 to the side of the splint 2 through the working pin 3.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A hanging basket steel plate sling limiting device, characterized in that: include: Steel plate sling (1), clamping plate (2), working pin (3) and limiting assembly (4); The two clamping plates (2) are provided, and the two clamping plates (2) are respectively provided on both sides of the steel plate sling (1), and the two clamping plates (2) can be fixed to the side of the steel plate sling (1) by a working pin (3); The limiting assembly (4) comprises a placement plate (41), a support plate (42) and a fixing plate (43); the placement plate (41) is arranged vertically, the support plate (42) is arranged horizontally at the lower end of the placement plate (41), one end of the support plate (42) is fixed to the placement plate (41), the support plate (42) is located between the bottoms of the two clamping plates (2), a fixing assembly (5) for connecting the support plate (42) and the clamping plates (2) is arranged inside the support plate (42), two fixing plates (43) are arranged symmetrically at the left and right ends of the same side of the placement plate (41), and the fixing plate (43) extends between the two clamping plates (2), and the fixing plate (43) A connecting tube (45) is connected to the outer side, and one end of the connecting tube (45) away from the fixed plate (43) is vertically fixedly connected to the movable plate (48), and the side of the movable plate (48) close to the fixed plate (43) is fixedly connected to the fixed rod (49), and an inner rod (491) is elastically arranged inside the fixed rod (49) along the length direction of the fixed rod (49), and one end of the inner rod (491) extends out of the fixed rod (49) and is fixed to the limit plate (410), and the clamping plate (2) and the fixed plate (43) are respectively provided with through holes (6) for the limit plate (410) to pass through, and the fixed plate (43) is provided with a control component for controlling the movement of the connecting tube (45) in a direction perpendicular to the fixed plate (43).

2. A hanging basket steel plate sling limiting device as claimed in claim 1, characterized in that: The control assembly comprises a rotating rod (44), a gear (47) and a toothed plate (46); an external thread is arranged on the surface of the rotating rod (44); the connecting tube (45) is threadedly connected to the outside of the rotating rod (44); the rotating rod (44) is connected to the fixed plate (43) along the axial rotation of the rotating rod (44); one end of the rotating rod (44) passes through the fixed plate (43) and is coaxially connected to the gear (47); a toothed plate (46) is elastically arranged on the side wall of the placement plate (41) in the vertical direction; the toothed plate (46) is meshed with the gear (47); when the toothed plate (46) moves downward, it drives the connecting tube (45) to move in a direction close to the fixed plate (43).

3. A hanging basket steel plate sling limiting device as claimed in claim 1, characterized in that: The other end of the inner rod (491) slides out of the fixed rod (49) and passes through the movable plate (48) and then connects to the pull block (492). The fixed rod (49) is provided with a first spring (7) on its outer sleeve, and the two ends of the first spring (7) are respectively fixedly connected to the limit plate (410) and the movable plate (48).

4. A hanging basket steel plate sling limiting device as claimed in claim 2, characterized in that: The side cross-section of the tooth plate (46) is shaped like an "L", and includes a horizontal plate portion and a vertical plate portion which are vertically connected to each other. The teeth of the tooth plate (46) are arranged on the vertical plate portion. A groove is provided on the surface of the placement plate (41). The vertical plate portion is slidably arranged in the groove along the vertical direction. A telescopic rod (412) is arranged between the lower surface of the tooth plate (46) and the inner wall of the groove. A second spring (8) is sleeved on the surface of the telescopic rod (412).

5. A hanging basket steel plate sling limiting device as claimed in claim 4, characterized in that: The side wall of the groove is provided with a first sliding groove, and the side wall of the vertical plate portion is fixed with a first sliding block (414), and the first sliding block (414) is slidably connected in the first sliding groove.

6. The steel plate sling limit device for a hanging basket as claimed in claim 1, characterized in that: Two limit assemblies (4) are provided, and the two limit assemblies (4) are symmetrically arranged on both sides of the working pin (3).

7. The steel plate sling limiter for a hanging basket as claimed in claim 1, characterized in that: A transmission bin (413) is provided in the support plate (42); the fixing assembly (5) comprises a motor (51), a threaded rod (53), a threaded tube (54) and a fixing block (55); the motor (51) is provided in the transmission bin (413); the output end of the motor (51) is coaxially connected to the threaded rod (53); the threaded tube (54) is threadedly connected to one end of the threaded rod (53); the end of the threaded tube (54) away from the threaded rod (53) is fixedly connected to the fixing block (55); a transmission groove is provided on the inner wall of the transmission bin (413); a second slider (57) is fixedly connected to the threaded tube (54); the second slider (57) is slidably connected to the transmission groove along the length direction of the threaded rod (53); an opening communicating with the transmission bin (413) is provided on the side of the support plate (42); a fixing groove (202) is provided on the clamping plate (2); and the fixing block (55) can be clamped in the fixing groove (202).

8. A hanging basket steel plate sling limiting device as claimed in claim 7, characterized in that: The motor (51) is provided with one, the motor (51) is a double-shaft motor, and the thread directions of the threaded rods (53) connected to the two output shafts are opposite.

9. A hanging basket steel plate sling limiting device as claimed in claim 7, characterized in that: The end of the fixed block (55) away from the threaded tube (54) is connected to a circular end fixing plate (551), and a first hinge block (91) is fixed on the end fixing plate (551) and located on the side of the fixed block (55). A long groove is provided on the fixed block (55) along the length direction of the threaded rod (53), and a second hinge block (92) is slidably connected in the long groove. A first connecting rod (93) is hinged on the first hinge block (91), and a second connecting rod (94) is hinged on the end of the first connecting rod (93) not connected to the first hinge block (91). The rod (94) is hinged to the second hinge block (92), and a third spring (95) is sleeved on the fixed block (55). When the second hinge block (92) is located at the end of the long slot away from the end fixing plate (551), the third spring (95) is located between the end fixing plate (551) and the second hinge block (92). An arc-shaped inner wall is provided in the fixed slot (202). When the fixed block (55) is clamped in the fixed slot (202), the hinge of the first connecting rod (93) and the second connecting rod (94) abuts against the arc-shaped inner wall.

10. A hanging basket steel plate sling limiting device as claimed in claim 9, characterized in that: The diameter of the end fixing plate (551) is smaller than the diameter of the opening, and smaller than the diameter of the notch of the fixing groove (202).

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