A self-locking and power-off lifting device

Abstract

The present invention relates to a self-locking power-off lifting device, comprising a fixed base plate, a composite shaft and a self-locking unit. The fixed base plate is hollowed out in the center with a guide hole tube, the composite shaft passes through the guide hole tube, the top end is connected to an external lifting device, and the bottom end is connected to an electrical device. The self-locking unit comprises a locking motor and a plurality of clamping blocks, the plurality of clamping blocks are located above the guide hole tube, a first conductive copper sheet is provided on the side wall of the composite shaft, and a second conductive copper sheet connected to a power source is provided on the inner wall of the clamping block; when the lifting device drives the composite shaft to rise, the plurality of clamping blocks come close to each other to clamp the composite shaft, and the first conductive copper sheet contacts the second conductive copper sheet to supply power to the electrical device. Compared with the prior art, the present invention replaces the redundant wires that are lifted and lowered with the electrical device with conductive copper sheets, reduces the volume space, and avoids the problem of redundant wires winding and heating; the self-locking unit and the composite shaft are clamped by mechanical force, and the weight of the electrical device is effectively transmitted by mechanical force, which significantly improves safety.

Description

Technical Field

[0001] The invention relates to the field of aerial mechanical equipment, in particular to a self-locking and power-off lifting device. Background Art

[0002] In some large buildings such as shopping malls, factories, waiting halls, etc., when overhead lighting and other hanging and suspended equipment reach the end of their service life or need to be replaced due to a fault, other aerial platforms must be used to assist in operation due to height restrictions, so that staff can reach the vicinity of the aerial equipment for manual repairs. The use fee and entry and exit fees of the aerial platform are very high, which makes the repair and maintenance cost several times the cost of the equipment itself, which is a huge expense for the user unit. In addition, the aerial platform itself must occupy a certain ground position and needs to be driven directly under the equipment, which also has high requirements for the ground environment.

[0003] In order to solve the above problems, the Chinese invention application with application number 202010480851.6 discloses a lifting device, which makes it possible to repair or replace high-altitude equipment without using a climbing vehicle, thus saving costs. However, the device still has the following inconveniences: 1. The hanging electrical equipment itself needs to carry a large number of energized wires. The wires take up a lot of space as the lifting device rises and falls, are prone to entanglement, and generate a lot of heat. 2. When performing maintenance, it is necessary to ensure that the electrical equipment is powered off, which may cause safety problems. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and provide a self-locking and power-off lifting device, which can save wires, reduce volume, reduce heat generation, and improve safety during maintenance.

[0005] The purpose of the present invention can be achieved by the following technical solutions:

[0006] A self-locking power-off and power-off lifting device comprises a fixed base plate, a composite shaft and a self-locking unit. The fixed base plate is hollowed out in the center to provide a guide hole tube. The composite shaft passes through the guide hole tube, the top end is connected to an external lifting device, and the bottom end is connected to an electrical device. The self-locking unit comprises a locking motor and a plurality of clamping blocks. The plurality of clamping blocks are mounted on the fixed base plate and are located above the guide hole tube. A first conductive copper sheet is provided on the side wall of the composite shaft, and a second conductive copper sheet connected to a power source is provided on the inner wall of the clamping block. When the lifting device drives the composite shaft to rise to a certain position, the plurality of clamping blocks are driven by the locking motor to move closer to each other to clamp the composite shaft, thereby the first conductive copper sheet contacts the second conductive copper sheet, so that the circuit in the composite shaft is connected to supply power to the electrical device.

[0007] Furthermore, the composite shaft includes a first connection end, a shaft body and a second connection end connected in sequence from top to bottom, the first connection end is connected to a lifting device, the second connection end is connected to an electrical device, the first conductive copper sheet is an annular ring structure, and at least two first conductive copper sheets are wound around the shaft body in parallel with each other.

[0008] Furthermore, a hanging hole is provided on the first connecting end, and the hanging hole is connected to the lifting device through a traction line.

[0009] Furthermore, the second connection end is a threaded connection port or a device connector.

[0010] Furthermore, at least one clamping block is provided with a circular groove for fitting against the outer wall of the composite shaft, and the second conductive copper sheet is arranged in the circular groove.

[0011] Furthermore, the wire passes through the side wall of the circular groove and is connected to the back side of the second conductive copper sheet, and the other end of the wire is connected to a power source.

[0012] Furthermore, the self-locking unit includes two clamping blocks.

[0013] Furthermore, it also includes an outer shell, the lower end of which is connected to a fixed bottom plate, the composite shaft and the self-locking unit are located in the outer shell, and a through hole is provided at the top of the outer shell for passing the lifting device.

[0014] Furthermore, a limit sensor is installed on the fixed bottom plate. When the lifting device drives the composite shaft to move to a certain position, the limit sensor is triggered, and then the locking motor is triggered to work.

[0015] Furthermore, the lifting device is a lifting motor or a lifting cylinder.

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

[0017] 1. The present invention is widely applicable to the hoisting of electrical equipment such as high-altitude lighting in large shopping malls, airport terminals, and factories, automobile traction equipment in the civilian field, and small and medium-sized tools in construction. The present invention cleverly replaces the existing redundant wires that are lifted and lowered with the electrical equipment through the design of the composite shaft and the conductive copper sheet on the self-locking unit, effectively reducing the volume space and avoiding the problem of redundant wires being entangled and heated; at the same time, when the electrical equipment is maintained, the lowering of the electrical equipment can automatically trigger a power outage, which significantly improves the safety of use.

[0018] 2. The present invention fixes the composite shaft by means of a self-locking unit, which provides auxiliary support for the electrical equipment hung below and improves the stability and safety of the hoisting. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a structural schematic diagram of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the present invention from another angle.

[0021] Figure 3 Schematic diagram of the structure of the composite shaft.

[0022] Figure 4 It is a schematic diagram of the structure of the outer shell.

[0023] Figure numerals: 1. Fixed base plate, 11. Guide hole tube, 2. Composite shaft, 21. First connecting end, 21a. Hanging hole, 21b. Convex ring, 22. Shaft body, 22a. First conductive copper sheet, 23. Second connecting end, 3. Self-locking unit, 31. Locking motor, 32. Clamping block, 32a. Circular groove, 33. Second conductive copper sheet, 4. Outer shell, 41. Through hole, 5. Limit sensor. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0025] Embodiment 1

[0026] like Figures 1-2 As shown, this embodiment provides a self-locking power-off lifting device, including a fixed base plate 1, a composite shaft 2 and a self-locking unit 3.

[0027] The fixed bottom plate 1 is generally fixedly installed at the lower edge of the indoor space roof, such as installed on a beam. A guide hole tube 11 is hollowed out in the center, and the diameter of the guide hole tube 11 is larger than the diameter of the composite shaft 2, and is used to pass the composite shaft 2.

[0028] The self-locking unit 3 generally includes a locking motor 31 and a plurality of clamping blocks 32 connected to each other. The locking motor 31 controls the separation and combination of the clamping blocks 32 to clamp the composite shaft 2. The specific form is not limited. The self-locking unit 3 is installed on the fixed base plate 1, and the clamping block 32 is located directly above the guide hole tube 11. In this embodiment, the self-locking unit 3 includes a locking motor 31 and two clamping blocks 32. Specifically, the two clamping blocks 32 are connected to each other through a guide column in the form of a worm, wherein a threaded hole is provided on the clamping block 32 on the right side to pass through the guide column. Thus, the locking motor 31 drives the guide column to rotate, and the guide column drives the clamping block 32 on the right side to move closer to the clamping block 32 on the left side. A circular groove 32a is provided on the inner side wall of the clamping block 32 on the left side for fitting the outer wall of the composite shaft 2. Two horizontal second conductive copper sheets 33 are provided in the circular groove 32a, and a wire is connected to the clamping block 32 on the left side, and the wire passes through the side wall of the circular groove 32a to connect to the back of the second conductive copper sheet 33, and the other end of the wire is connected to a power supply. The power source can be a battery built into the organization or an external power grid line.

[0029] Composite axis 2 Figure 3 As shown, the composite shaft 2 includes a first connection end 21, an axle body 22, and a second connection end 23 connected in sequence from top to bottom. The first connection end 21 is used to adapt to the lifting device of the external device. In this embodiment, the structure of the hanging hole 21a is adopted, and the lifting device above is connected through the traction line. The lower end of the first connection end 21 also has a convex ring 21b. When the self-locking unit 3 clamps the composite shaft 2, the convex ring 21b is mounted on the upper surface of the clamping block 32, so that the weight of the electrical equipment is effectively transmitted through mechanical force, avoiding the traction line of the external device from being stressed during daily work, thereby increasing the safety factor. The second connection end 23 is used to adapt to the connection of the hoisted electrical equipment. The electrical equipment in this embodiment is a lamp, such as a large household chandelier, an airport terminal roof lamp, a factory lamp, etc. The second connection end 23 can use a threaded connection port to directly connect a light bulb, or it can be adapted to connect a device connector and a lamp. At least two first conductive copper sheets 22a are arranged on the shaft body 22. In this embodiment, the first conductive copper sheets 22a are annular ring structures. The two first conductive copper sheets 22a are wound around the shaft body 22 in parallel with each other, and their positions correspond to the second conductive copper sheets 33 on the clamping block 32. The first conductive copper sheets 22a are connected to the circuit inside the shaft body 22 and are connected to the electrical equipment.

[0030] In this embodiment, a limit sensor 5 is further installed on the fixed base plate 1. When the lifting device drives the composite shaft 2 to move to a certain position, the limit sensor 5 is triggered, and then the locking motor 31 is triggered to work.

[0031] The external lifting device is generally a lifting motor or a lifting cylinder. In this embodiment, a lifting motor is used, and the motor is connected to the lifting hole 21a on the composite shaft 2 through a traction line. The traction line is used as a power transmission body during lifting and lowering, and its material is not limited to metal, and can also be non-metallic fiber.

[0032] This embodiment is used when the electrical equipment is lowered and raised.

[0033] The specific process of the electrical equipment rising is as follows: the lifting device drives the composite shaft 2 to rise to the specified position, triggering the limit sensor 5, at which time the lifting device stops working, and the clamping blocks 32 of the self-locking unit 3 move closer to each other and clamp the composite shaft 2 under the drive of the locking motor 31, thereby the first conductive copper sheet 22a contacts the second conductive copper sheet 33, so that the circuit in the composite shaft 2 is connected, and power is supplied to the electrical equipment.

[0034] The electrical equipment is lowered as follows: the clamping block 32 of the self-locking unit 3 separates the composite shaft 2 under the drive of the locking motor 31, the lifting device is reversed, and under the gravity of the electrical equipment and the composite shaft 2, the composite shaft 2 descends with the electrical equipment and comes out from under the guide hole tube 11. At this time, the first conductive copper sheet 22a contacts the second conductive copper sheet 33, so that the power supply of the electrical equipment is automatically disconnected, ensuring safety.

[0035] Embodiment 2

[0036] The basic principle and structure of this embodiment are the same as those of the first embodiment, except that it further comprises an outer shell 4. Figure 4 As shown. The lower end of the outer shell 4 is connected to a fixed bottom plate. The composite shaft and the self-locking unit are located in the outer shell 4. A through hole 41 is provided at the top of the outer shell 4 for passing the lifting and traction line. The outer shell 4 is the outer shape of this embodiment, and its shape can be any shape such as square, round, etc., and the material can be metal or non-metal. The non-metal material reaches Class A fire protection, or there is no fire protection requirement.

[0037] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A self-locking and power-off lifting device, characterized in that: The invention comprises a fixed base plate (1), a composite shaft (2) and a self-locking unit (3); the fixed base plate (1) is hollowed out in the center and provided with a guide hole tube (11); the composite shaft (2) passes through the guide hole tube (11); the top end of the composite shaft (2) is connected to an external lifting device; the bottom end of the composite shaft (2) is connected to an electrical device; the self-locking unit (3) comprises a locking motor (31) and a plurality of clamping blocks (32); the plurality of clamping blocks (32) are mounted on the fixed base plate (1) and are located at the guide hole tube (11). 11), at least two first conductive copper sheets (22a) are provided on the side wall of the composite shaft (2), and a second conductive copper sheet (33) connected to a power source is provided on the inner wall of the clamping block (32); when the lifting device drives the composite shaft (2) to rise to a certain position, the plurality of clamping blocks (32) are driven by the locking motor (31) to move closer to each other to clamp the composite shaft (2), thereby the first conductive copper sheet (22a) contacts the second conductive copper sheet (33), so that the circuit in the composite shaft (2) is connected, and power is supplied to the electrical equipment; The composite shaft (2) comprises a first connection end (21), a shaft body (22) and a second connection end (23) which are connected in sequence from top to bottom, the first connection end (21) is connected to a lifting device, the second connection end (23) is connected to an electrical device, the first conductive copper sheet (22a) is an annular ring structure, and at least two first conductive copper sheets (22a) are wound around the shaft body (22) in parallel with each other; The lower end of the first connecting end (21) also has a convex ring, and when the self-locking unit (3) clamps the composite shaft (2), the convex ring is mounted on the upper surface of the clamping block (32).

2. A self-locking and power-off lifting device according to claim 1, characterized in that: The first connection end (21) is provided with a hanging hole (21a), and the hanging hole (21a) is connected to the lifting device via a traction line.

3. A self-locking and power-off lifting device according to claim 1, characterized in that: The second connection end (23) is a threaded connection port or a device connector.

4. A self-locking and power-off lifting device according to claim 1, characterized in that: At least one clamping block (32) is provided with a circular groove (32a), the circular groove (32a) being used to fit the outer wall of the composite shaft (2), and the second conductive copper sheet (33) is arranged in the circular groove (32a).

5. A self-locking and power-off lifting device according to claim 4, characterized in that: One end of the wire passes through the side wall of the circular groove (32a) and is connected to the back side of the second conductive copper sheet (33), and the other end of the wire is connected to a power source.

6. A self-locking and power-off lifting device according to claim 1, characterized in that: The self-locking unit (3) comprises two clamping blocks (32).

7. A self-locking and power-off lifting device according to claim 2, characterized in that: It also includes an outer shell (4), the lower end of which is connected to a fixed base plate (1), the composite shaft (2) and the self-locking unit (3) are located inside the outer shell (4), and a through hole (41) is provided at the top end of the outer shell (4), and the through hole (41) is used to pass a traction line.

8. A self-locking and power-off lifting device according to claim 1, characterized in that: A limit sensor (5) is installed on the fixed base plate (1). When the lifting device drives the composite shaft (2) to move to a certain position, the limit sensor (5) is triggered, and then the locking motor (31) is triggered to work.

9. A self-locking and power-off lifting device according to claim 1, characterized in that: The lifting device is a lifting motor or a lifting cylinder.

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