Lamp lifter

Abstract

The utility model relates to a lamp lifter which comprises a rack, a controller, a rotating shaft rotatably arranged on the rack, a wire spool sleeved on the rotating shaft and used for winding a lifting wire, and a rotation driving mechanism connected with the rotating shaft, and the rotation driving mechanism is electrically connected with the controller. The rotating shaft is connected with a motion conversion mechanism used for converting the rotating motion of the rotating shaft into linear motion, a limiting trigger piece is arranged at the linear motion output end of the motion conversion mechanism, the lamp lifter further comprises an upper limiting travel switch used for limiting the highest rising position, and the upper limiting travel switch is electrically connected with the controller. And when the limiting triggering piece triggers the upper limiting travel switch, the controller controls the rotary driving mechanism to stop running. The structure has a limiting protection function and can automatically stop after reaching a preset position, excessive damage caused by lifting is avoided, and the use safety is higher.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, and in particular to a lighting lifting device. Background Technology

[0002] Lighting fixture lifters are specifically designed for high-altitude lighting applications such as industrial and mining lighting, large sports facilities, cultural venues, large shopping malls, and railway stations and docks. Their advantage lies in transforming high-altitude cleaning and maintenance of lighting fixtures into ground-level operations, saving significant maintenance costs and time, and ensuring the safety of maintenance personnel. Existing lighting fixture lifters generally use a motor or other drive mechanism to rotate a shaft and an integrated winding reel, thereby winding or releasing the lifting cable to achieve the lifting function of the lighting fixture at height. However, existing structures lack lifting limit protection functions, and lifting limit control is usually done manually. If the user fails to stop the lift in time, the winding reel continues to wind, causing the lighting fixture to rise continuously, potentially leading to collision damage. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the above-mentioned problems and provide a lamp lifter with limit protection function.

[0004] The technical solution of this utility model is as follows: A lamp lifting device according to this utility model includes a frame, a controller, a rotating shaft rotatably mounted on the frame, a winding reel fitted on the rotating shaft for winding the lifting wire, and a rotary drive mechanism connected to the rotating shaft. The rotary drive mechanism is electrically connected to the controller. The rotating shaft is characterized by having a motion conversion mechanism connected to it for converting the rotational motion of the rotating shaft into linear motion. The linear motion output end of the motion conversion mechanism is provided with a limit trigger. The lamp lifting device also includes an upper limit travel switch for limiting the highest lifting position. The upper limit travel switch is electrically connected to the controller. When the limit trigger activates the upper limit travel switch, the controller controls the rotary drive mechanism to stop operating.

[0005] In the above structure, this utility model utilizes the cooperation of a motion conversion mechanism, an upper limit travel switch, and a limit trigger to automatically stop the lamp at the set highest position after the rotating shaft rotates to a preset number of revolutions, effectively improving safety in use. It eliminates the need for manual control and avoids situations such as collision damage caused by untimely control.

[0006] Furthermore, the lamp lifter described in this utility model also includes a lower limit travel switch for limiting the lowest descent position. The lower limit travel switch is electrically connected to the controller. When the limit trigger activates the lower limit travel switch, the controller stops the rotary drive mechanism. The cooperation of the lower limit travel switch and the limit trigger allows the lamp to automatically stop at the set lowest position, further ensuring safety during use.

[0007] Furthermore, in the lamp lifting device described in this utility model, the motion conversion mechanism adopts a lead screw and nut mechanism. The lead screw is coaxially connected to the rotating shaft, the nut is fitted on the lead screw and moves linearly along the lead screw axis, and the limiting trigger is provided on the nut. The lead screw and nut mechanism has a simple and compact structure and is easy to implement.

[0008] Furthermore, in the lamp lifter described in this utility model, there are at least two rotating shafts arranged around the same center, and the motion conversion mechanism is disposed on one of the rotating shafts. The synchronous rotation of multiple rotating shafts drives the synchronous winding of each lifting line, thereby achieving multi-point synchronous suspension and lifting of the lamp, ensuring a more stable and balanced lifting process and preventing swaying or tilting.

[0009] Furthermore, in the lamp lifting device described in this utility model, the rotary drive mechanism includes multiple drive motors connected one-to-one with each rotating shaft, and each drive motor is electrically connected to the controller. This structure adopts a one-to-one drive method between the motor and the rotating shaft, and the controller controls each motor to ensure the synchronous rotation of each rotating shaft. Each group of drives is independent of each other, and can be independently controlled when there is a lifting error adjustment, ensuring the precise winding movement of each lifting rope.

[0010] Furthermore, in the lamp lifter described in this utility model, the rotary drive mechanism includes a drive motor electrically connected to the controller and a transmission assembly disposed between every two adjacent rotating shafts. The drive motor connects to one of the rotating shafts and drives each rotating shaft to rotate synchronously through the transmission assembly. This structure achieves the synchronicity of rotation of each rotating shaft by using a single motor paired with multiple sets of transmission assemblies, eliminating the need to set multiple sets of motor parameters and reducing the complexity of system coordinated control.

[0011] Furthermore, in the lamp lifter described in this utility model, the transmission component includes a pair of bevel gear transmission pairs mounted on two adjacent rotating shafts.

[0012] Furthermore, in the lamp lifting device described in this utility model, the lifting line is conductive. One end of the lifting line is connected and fixed inside the winding reel and electrically connected to the controller through a conductive slip ring, while the other end is electrically connected to the lamp. Using the lifting line directly as a power supply conductor allows it to provide power to the lamp while simultaneously performing its lifting and traction function.

[0013] Furthermore, in the lamp lifting device described in this utility model, a guide wheel is rotatably provided on the frame. After the lifting line is led out from the winding reel, it passes around the guide wheel and connects to the lamp, which has a good guiding effect and avoids the lifting line from shifting or deviating during the lifting process.

[0014] The beneficial effects of this utility model are:

[0015] 1. This utility model has a simple structure and reasonable design, featuring limit protection. It can automatically stop when reaching the preset highest and lowest rising positions, preventing collision damage due to excessive lifting and lowering, thus enhancing safety. Furthermore, the limit protection is achieved by converting the rotating shaft's motion into linear motion and controlling it based on the arrival trigger sensor, resulting in more precise limit control. This allows the lifting cable to be used directly as a power supply conductor, providing power to the lighting fixtures while simultaneously performing the lifting and traction function.

[0016] 2. This utility model allows for flexible adjustment of the lamp height according to requirements, and adopts a multi-point synchronous and stable lifting method to increase the number of suspension points for lamp lifting and improve the stability of lamp lifting.

[0017] 3. This utility model combines the lifting line with the power supply line, so that it can have the function of lifting and traction while also supplying power to the lamps. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of Example 1.

[0019] Figure 2 This is a schematic diagram of the structure of Example 2. Detailed Implementation

[0020] The present invention will now be further described with reference to the accompanying drawings: Example 1

[0021] Reference Figure 1 As shown in this embodiment, a lamp lifting device includes a frame 1, a controller 2, a rotating shaft 3 rotatably mounted on the frame 1, a winding reel 4 mounted on the rotating shaft 3 for winding the lifting line 5, and a rotary drive mechanism connected to the rotating shaft 3. The rotary drive mechanism is electrically connected to the controller 2. Specifically, there are at least two rotating shafts 3 arranged around the same center. The rotary drive mechanism includes multiple drive motors 6 connected one-to-one with each rotating shaft 3, and each drive motor 6 is electrically connected to the controller 2. A guide wheel 7 is rotatably mounted on the frame 1. The lifting line 5 is led out from the winding reel 4, passes around the guide wheel 7, and connects to the lamp. Ideally, there are three rotating shafts 3 arranged in a triangular pattern. The lamp is triangularly balanced and synchronously suspended by the three concentrically arranged lifting lines 5, ensuring a more stable lifting process and preventing swaying or tilting. It has a multi-point, directional, stable, and synchronous lifting and traction function. The number of rotating shafts 3 can also be increased and arranged in a polygonal pattern according to the shape of the lamp.

[0022] To ensure the safety of the lamp's lifting and lowering operation, this embodiment implements limit control for the highest and lowest lifting positions of the lamp. Specifically, one of the rotating shafts 3 is connected to a motion conversion mechanism 9, which converts the rotational motion of the rotating shaft 3 into linear motion. The linear motion output end of the motion conversion mechanism 9 is equipped with a limit trigger 10. The lamp lifter also includes an upper limit travel switch 11 for limiting the highest lifting position and a lower limit travel switch 8 for limiting the lowest lowering position. Both the upper limit travel switch 11 and the lower limit travel switch 8 are electrically connected to the controller 2. When the limit trigger 10 triggers the lower limit travel switch 8 or the upper limit travel switch 11, the controller 2 controls the rotation drive mechanism to stop operating. The motion conversion mechanism 9 adopts a screw and nut mechanism. The screw 9a is coaxially connected to the rotating shaft 3, and the nut 9b is fitted on the screw 9a and moves linearly along the axial direction of the screw 9a. The limit trigger 10 is located on the nut 9b.

[0023] One of the lifting lines 5 is conductive. One end of the lifting line 5 is connected and fixed inside the winding reel 4 and electrically connected to the controller 2 through the conductive slip ring 12. The other end is electrically connected to the lamp. Example 2

[0024] Reference Figure 2 As shown, this embodiment is basically the same as embodiment 1, except that the structure of the rotary drive mechanism is different. It includes a drive motor 6 electrically connected to the controller 2 and a transmission assembly located between every two adjacent rotating shafts 3. The drive motor 6 connects to one of the rotating shafts 3 and drives each of the rotating shafts 3 to rotate synchronously through the transmission assembly. The transmission assembly includes a pair of bevel gear transmission pairs 13 mounted on two adjacent rotating shafts 3. After the drive motor 6 drives one rotating shaft 3 to rotate, that rotating shaft 3 transmits its motion to the remaining rotating shafts 3 one by one through the bevel gear transmission pairs 13, thereby ensuring that all rotating shafts 3 can rotate synchronously and uniformly, and that the lifting lines 5 achieve synchronous winding to lift and pull the lamp.

[0025] The specific embodiments described herein are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A lamp lifting device, comprising a frame, a controller, a rotating shaft rotatably mounted on the frame, a winding reel fitted on the rotating shaft for winding a lifting cord, and a rotary drive mechanism connected to the rotating shaft, wherein the rotary drive mechanism is electrically connected to the controller, characterized in that: The rotating shaft is connected to a motion conversion mechanism to convert the rotational motion of the rotating shaft into linear motion. The linear motion output end of the motion conversion mechanism is equipped with a limit trigger. The lamp lifter also includes an upper limit limit switch for limiting the highest rising position and a lower limit limit switch for limiting the lowest falling position. Both the upper limit limit switch and the lower limit limit switch are electrically connected to the controller. When the limit trigger triggers the upper limit limit switch or the lower limit limit switch, the controller controls the rotation drive mechanism to stop running.

2. The lamp lifting device according to claim 1, characterized in that: The motion conversion mechanism adopts a lead screw and nut mechanism, with the lead screw and rotating shaft coaxially connected, the nut being fitted on the lead screw and moving linearly along the lead screw axis, and the limit triggering element being provided on the nut.

3. The lamp lifting device according to claim 1, characterized in that: There are at least two rotating shafts arranged around the same center, and the motion conversion mechanism is mounted on one of the rotating shafts.

4. The lamp lifting device according to claim 3, characterized in that: The rotary drive mechanism includes multiple drive motors that are connected to each of the rotating shafts in a one-to-one manner, and each drive motor is electrically connected to the controller.

5. The lamp lifting device according to claim 3, characterized in that: The rotary drive mechanism includes a drive motor electrically connected to the controller and a transmission assembly located between every two adjacent rotating shafts. The drive motor is connected to one of the rotating shafts and drives each rotating shaft to rotate synchronously through the transmission assembly.

6. The lamp lifting device according to claim 5, characterized in that: The transmission assembly includes a pair of bevel gears mounted on two adjacent rotating shafts.

7. The lamp lifting device according to claim 1, characterized in that: The lifting line is conductive. One end of the lifting line is connected and fixed inside the winding reel and electrically connected to the controller through a conductive slip ring. The other end is electrically connected to the lamp.

8. The lamp lifting device according to claim 1, characterized in that: The frame is rotatably equipped with a guide wheel, and the lifting line is led out from the winding reel, passes around the guide wheel, and connects to the lamp.

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