Loop chain type lifting point lifting equipment

Abstract

The utility model belongs to the technical field of electric hoists, and particularly relates to loop chain type lifting point lifting equipment which comprises a machine shell and a brake motor installed in the machine shell, a lock chain is wound on a main shaft of the brake motor, a through hole is formed in the bottom of the machine shell, the lock chain penetrates through the through hole, and a plurality of protection plates are distributed on the outer edge of the through hole in a circumferential array mode. The bottoms of the protection plates are bent in the direction deviating from the through holes, reset pieces are arranged at the bent positions, guide rollers are rotationally installed on the edges, away from the machine shell, of the protection plates, tough pieces are fixed between the side faces of every two adjacent protection plates, and each reset piece comprises a rubber ring fixed to the corresponding bent position. The top of the rubber ring is connected to the bottom of the machine shell, and two crossed return elastic pieces are fixed in the rubber ring. The petal-shaped limiting structure is additionally arranged to protect and prevent the chain from being clamped, so that the degree of damage caused by friction between the chain and teeth of the chain wheel is reduced, and the anti-rust performance of the exposed part of the chain is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to electric hoist technical field, concretely relates to a kind of ring chain type lifting point lifting equipment. BACKGROUND

[0002] Ring chain type lifting equipment is a kind of electric hoist, when motor rotates, the rotational speed is reduced by speed reducer, and then is transmitted to chain.The chain is composed of multiple links, which are linked together by connecting pins and meshed with sprocket.When the motor drives the sheave (or sprocket) to rotate, the chain will move along the wheel groove, thereby converting the torque into a straight-line traction force, achieving the lifting of heavy objects.

[0003] In the aspect of architectural design or architectural audio and video hoisting, the use of ring chain type lifting equipment can save manpower and resources, such as hoisting display equipment, effect lighting equipment, sound amplification equipment, etc., which can be freely lifted.By searching, there is a Chinese utility model with announcement number CN111776968A, which provides a relatively closed sliding channel and storage space for the chain by setting a protective cover and a chain storage box, avoiding the entry of foreign matter and rainwater into the chain storage box, and avoiding the rusting of the chain.

[0004] When hoisting audio and video components, the chain is protected by the protective cover and the chain storage box, as most of the chain is exposed and hangs down, and the center of gravity of the large-width audio and video components such as lamp holders or display screens is difficult to coincide with the chain, which is prone to swing, causing the chain to scratch the teeth of the sprocket, which may scratch or fall off the coating, resulting in a decrease in the rust-proof performance of the exposed part. UTILITY MODEL CONTENTS

[0005] The utility model aims to provide a ring chain type lifting point lifting equipment, which is equipped with a petal-shaped limiting structure to protect and avoid locking the chain, thereby reducing the degree of damage to the chain and sprocket teeth caused by friction, and facilitating the protection of the rust-proof performance of the exposed part of the chain.

[0006] The technical solutions adopted by the utility model are as follows:

[0007] A ring chain type lifting point lifting equipment includes a housing and a brake motor installed inside the housing, a lock chain is wound around the main shaft of the brake motor, a through hole is formed in the bottom of the housing and penetrated by the lock chain, a plurality of protective plates are arranged in a circumferential array on the outer edge of the through hole, the bottom of each protective plate is bent away from the through hole, and a reset member is arranged at the bent portion, a guide roller is rotatably installed on the edge of each protective plate away from the housing, and a flexible sheet is fixed between the side surfaces of two adjacent protective plates.

[0008] As an option, the reset member comprises a rubber ring fixed at the bending part, the top of the rubber ring is connected to the bottom of the machine shell, and two cross recovery elastic sheets are fixed inside the rubber ring.

[0009] As an option, the rubber ring is further provided with micro air capsules staggered with the recovery elastic sheets inside the rubber ring, the micro air capsules are parallel to the adjacent protective plates, so that the elastic deformation of the micro air capsules is used to supplement the elasticity of the recovery elastic sheets, the smoothness of the petal-shaped limiting structure in blocking the chain is increased, and the quick rebound of the reset deformation of the micro air capsules after unloading is used, and the adhesive grooves are formed on the outside of the micro air capsules, so that the rubber ring is firmly grabbed after gluing, and is not easy to fall off or open.

[0010] As an option, a steel wire ring is further provided around the protective plate, and the steel wire ring partially contacts the outside of the flaky piece.

[0011] As an option, limiting rings are fixed on both sides of the protective plate and are penetrated by the steel wire ring, and a space is left between the limiting rings and the recovery elastic sheets.

[0012] As an option, a flange plate is installed on the outside of the machine shell, and a hanging bag is installed at the bottom of the flange plate to cover one end of the chain.

[0013] As an option, a hook is rotatably installed at the end of the chain away from the hanging bag, and a limiting pin is hinged at the hook of the hook.

[0014] The technical effects achieved by the utility model are as follows:

[0015] The utility model is assembled with the petal-shaped limiting structure below the electric hoist, and once the chain swings, the chain is limited and blocked by the petals, the pressure deformation of the reset member can be buffered, the deformation angle is small, the swing friction between the chain wheel and the chain can be reduced, the chain is supported by the guide roller, the guide roller contacts the chain before the protective plate, when the chain rises and falls, the friction between the chain and the protective plate is removed by the rolling of the guide roller, the chain is prevented from being stuck, the degree of damage of the teeth of the chain wheel due to friction is reduced, and the anti-rust performance of the exposed part of the chain is improved.

[0016] When the protective plate is deflected, the deformation of the rubber ring is buffered by extrusion, a certain rigidity is provided, the recovery elastic sheet is used as an inner framework to support the rubber ring, the recovery elastic sheet is made of a memory alloy material, and after the deformation of the rubber ring, the recovery elastic sheet can return to the initial shape under the unloading state, so as to reset the rubber ring and drive the petal-shaped limiting structure to protect the chain. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1This is a front view of a chain-type lifting device according to this utility model;

[0018] Figure 2 This is a side view of a chain-type lifting device according to this utility model;

[0019] Figure 3 This is a front view of the annular array protective plate of this utility model;

[0020] Figure 4 This is a top view of the annular array protective plate of this utility model;

[0021] Figure 5 This is a front view of a single protective plate of this utility model;

[0022] Figure 6 This is the front view of the return spring of this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Housing; 2. Brake motor; 3. Chain; 4. Protective plate; 5. Guide roller; 6. Flexible plate; 7. Rubber ring; 701. Limiting ring; 8. Return spring; 9. Miniature air capsule; 10. Adhesive groove; 11. Steel wire ring; 12. Flange plate; 13. Lifting bag; 14. Lifting hook; 15. Limiting pin. Detailed Implementation

[0025] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0026] Architectural design is based on actual usage needs. For example, in places such as conference halls and exhibition halls, display equipment, effect lighting equipment, and sound reinforcement equipment are usually installed. During the installation process, using electric hoists for lifting and lowering is very time-saving and labor-saving, which can greatly reduce the traditional manual installation methods.

[0027] like Figures 1-6As shown, a kind of loop chain type lifting point lifting device, including shell 1 and brake motor 2 installed in the inside of shell 1, brake motor 2 model is YHPE750-4, brake motor 2 power is 750W, brake motor 2 rotation speed is 1380 revolutions / min, power supply voltage needs 380V, can be through the drag type remote control operation positive and negative rotation, brake motor 2 main shaft is wound with chain 3 by the sprocket with involute tooth shape, when brake motor 2 positive rotation, drive sprocket pay off chain 3, make chain 3 hang load, such as display equipment, effect light equipment, public address equipment etc., while when brake motor 2 reverses, wind chain 3, pull chain 3 to lift load, it is convenient to hang.

[0028] Display equipment, effect light equipment, public address equipment etc., they have greater width, after being hung by chain 3, their gravity center is easy to deviate from chain 3, in addition, shell 1 is often pre-installed to the height of building, make chain 3 induce swing, and the tooth of sprocket is rubbed intensively, even damage surface coating.

[0029] Referring to the accompanying drawings Figure 1 、 Figure 3 And Figure 5 , the embodiment is provided with 8 protective plates 4, also can be 10, which are circumferentially distributed on the outer edge of the through hole, and are connected to the lower surface of shell 1 by hinged shaft, since the side surface between two adjacent protective plates 4 is fixed with flexible sheet 6, these protective plates 4 are petal-shaped and surround chain 3, once chain 3 swings, it is limited and blocked by the petals, in addition, the bottom of protective plate 4 is bent away from the direction of through hole, and reset member is arranged at the bent part, which can buffer through the pressure deformation of reset member, wherein the deformation angle is small, which can reduce the swing friction between sprocket and chain 3, and guide roller 5, which is rotatably installed on the edge of protective plate 4 away from shell 1, supports chain 3, so that guide roller 5 contacts chain 3 before protective plate 4, when chain 3 lifts, the rolling of guide roller 5 removes the friction between chain 3 and protective plate 4, to avoid jamming chain 3, so as to reduce the damage degree of chain 3 and the tooth of sprocket due to friction, which is beneficial to protect the antirust performance of exposed part of chain 3, and flexible sheet 6 made of rubber material connects all protective plates 4, which can disperse the load of single protective plate 4 to each reset member and protective plate 4, to prevent single protective plate 4 from being damaged due to excessive pressure.

[0030] Referring to the accompanying drawings Figure 4 、 Figure 5 And Figure 6To ensure the smooth reset of the petal-shaped limiting structure, the reset component used in this embodiment includes a rubber ring 7 bonded to the bend. Alternatively, the rubber ring 7 can be welded to the bend using a heat gun. This allows for buffering by compressing the deformation of the rubber ring 7 when the protective plate 4 deflects. To provide a certain rigidity, the top of the rubber ring 7 is connected to the bottom of the housing 1, and two intersecting return springs 8 are bonded inside the rubber ring 7. The return springs 8 serve as an inner skeleton to support the rubber ring 7. The return springs 8 are made of shape memory alloy, which can return to their initial shape after the rubber ring 7 is deformed and the load is removed, thereby pushing the rubber ring 7 to reset and causing the petal-shaped limiting structure to center and protect the chain 3.

[0031] Furthermore, the length of one return spring 8 is greater than the length of the other return spring 8, which can leave a larger deformation space between the two. This is used for the two to be pressed close together, and for the stretching or compression deformation of the rubber ring 7. Moreover, the thickness of the return spring 8 is two-thirds of the thickness of the end of the return spring 8. The end of the return spring 8 is set to be arc-shaped to avoid cutting the rubber ring 7.

[0032] See attached document Figure 5 and Figure 6 Inside the rubber ring 7, there are also micro gas capsules 9 that are interwoven with the return spring 8. The micro gas capsules 9 are filled with inert gas and are parallel to the adjacent protective plate 4. The compression deformation of the micro gas capsules 9 supplements the elasticity of the return spring 8, increases the smoothness of the petal-shaped limiting structure blocking the chain 3, and allows for rapid rebound after unloading by restoring the deformation of the micro gas capsules 9. In addition, an adhesive groove 10 is provided on the outside of the micro gas capsules 9. After applying the adhesive, the rubber ring 7 is firmly gripped over a large area, making it less likely to fall off or come apart.

[0033] See attached document Figure 3 and Figure 4 This embodiment also includes a wire ring 11 surrounding the protective plate 4. Since the wire ring 11 partially contacts the outer side of the ligament 6, it will not be touched by the chain 3. When the petal-shaped limiting structure is squeezed by the chain 3, it is pulled by the traction of the wire ring 11 to ensure the integrity of the ligament 6. Moreover, the wire ring 11 is looser than the ligament 6 and will not hinder the deformation of the ligament 6.

[0034] See attached document Figure 3 , Figure 4 and Figure 5 Both sides of the protective plate 4 are integrally installed with limiting rings 701 through which the steel wire ring 11 passes. The limiting rings 701 can also be welded to both sides of the protective plate 4 later, depending on the actual process selection. They are used to suspend the steel wire ring 11 and prevent the steel wire ring 11 from drooping and getting caught in the guide roller 5. There is a gap between the limiting ring 701 and the return spring 8 to prevent them from rubbing against each other.

[0035] See attached document Figure 1And Figure 2 The end of the chain 3 away from the bag 13 is rotatably installed with a hook 14 through a shaft sleeve, when the chain 3 falls, the goods are first bound with the rope in an inverted "V" shape, then the midpoint of the rope is hooked with the hook 14, the cover of the hook is covered with the limiting pin 15 through the hinge of the hook, and the limiting pin 15 has magnetism and can naturally attract the hook to prevent the rope from slipping.

[0036] Refer to the attached Figure 1 And Figure 2 The flange plate 12 is installed on the outside of the shell 1 through screws or bolts, after unloading, the bag 13 covering one end of the chain 3 is installed on the bottom of the flange plate 12 to contain the chain 3, most of the idle chain 3 is put into the bag 13, the surface air flow is reduced, the chain 3 is in a low lubricating oil environment, and the rust possibility is reduced.

[0037] The working principle of the utility model is as follows: when working, the brake motor 2 drives the chain wheel to pay off the chain 3, so that the chain 3 falls to load the weight, and when the brake motor 2 reverses to wind the chain 3, the chain 3 is pulled to lift the weight.

[0038] At the same time, the protective plate 4 is connected to the lower surface of the shell 1 through the hinge shaft, and surrounds the chain 3 in a petal shape, once the chain 3 swings, the petal limits and blocks, and the protective plate 4 is pressed and deformed through the reset piece to buffer, wherein the deformation angle is small, the swing friction between the chain wheel and the chain 3 is reduced, the guide roller 5 supports the chain 3, the guide roller 5 contacts the chain 3 before the protective plate 4, the friction between the chain 3 and the protective plate 4 is removed through the rolling of the guide roller 5, the chain 3 is prevented from being stuck, the degree of damage of the chain 3 and the chain wheel due to friction is reduced, the rust prevention performance of the exposed part of the chain 3 is protected, and the tough piece 6 made of rubber material is connected to all the protective plates 4, the load of the single protective plate 4 is dispersed to each reset piece and protective plate 4, and the single protective plate 4 is prevented from being damaged due to excessive pressure.

[0039] The above is only the optional embodiment of the utility model, it should be pointed out that for ordinary skilled person in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, these improvements and refinements should also be regarded as the protection scope of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to the conventional means in the field without special description and limitation.

Claims

1. A ring chain type lifting device of a lifting point, comprising a casing (1) and a brake motor (2) installed inside the casing (1), a lock chain (3) being wound around a main shaft of the brake motor (2), characterized in that: The bottom of the casing (1) is provided with a through hole penetrated by the chain (3), and the outer edge of the through hole is circumferentially provided with a plurality of protective plates (4), the bottom of each protective plate (4) is bent away from the through hole, and the bent portion is provided with a reset member, the edge of each protective plate (4) away from the casing (1) is rotatably provided with a guide roller (5), and the side surface between two adjacent protective plates (4) is fixedly provided with a flexible sheet (6).

2. A link chain type lifting point lifting device according to claim 1, characterized in that: The reset member comprises a rubber ring (7) fixed to the bent portion, and the top of the rubber ring (7) is connected to the bottom of the casing (1), and the inside of the rubber ring (7) is fixedly provided with two mutually intersecting return springs (8).

3. A link chain type lifting point lifting device according to claim 2, characterized in that: The inside of the rubber ring (7) is further provided with a micro air capsule (9) staggered with the return spring (8), the micro air capsule (9) is parallel to the adjacent protective plate (4), and the outside of the micro air capsule (9) is provided with a glue groove (10).

4. A link chain type lifting device for lifting points according to claim 2, characterized in that: Further comprising a steel wire ring (11) surrounding the protective plate (4), and the steel wire ring (11) partially contacts the outside of the flexible sheet (6).

5. A link chain type lifting device for lifting points according to claim 4, characterized in that: The two sides of the protective plate (4) are fixedly provided with a limiting ring (701) penetrated by the steel wire ring (11), and a spacing is left between the limiting ring (701) and the return spring (8).

6. A link chain type lifting device for lifting points according to claim 1, characterized in that: The outside of the casing (1) is provided with a flange plate (12), and the bottom of the flange plate (12) is provided with a hanging bag (13) sleeving one end of the chain (3).

7. A link chain type lifting device for lifting points according to claim 6, characterized in that: The end of the chain (3) away from the hanging bag (13) is rotatably provided with a hook (14), and the hook (14) is hingedly provided with a limiting pin (15) at the bent portion.

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