CN212339171U

CN212339171U - Lifting device with microswitch

Info

Publication number: CN212339171U
Application number: CN202021042870.2U
Authority: CN
Inventors: 郭传莉
Original assignee: Guangzhou Shengjiang Lighting Co ltd
Current assignee: Guangzhou Shengjiang Lighting Co ltd
Priority date: 2020-06-08
Filing date: 2020-06-08
Publication date: 2021-01-12
Anticipated expiration: 2030-06-08

Abstract

The utility model relates to a lifting device with a microswitch, which comprises a lifting hanging scaffold, a steel wire unreeling mechanism and a microswitch; the steel wire unwinding mechanism comprises an unwinding wheel and a driving unit for controlling the unwinding wheel to unwind and unwind steel wires, and the driving unit controls the unwinding wheel to unwind and unwind the steel wires connected with the lifting hanging scaffold to drive the lifting hanging scaffold to lift; the micro-gap switch be connected with the gravity switch subassembly that is used for the sensation to be connected with the lift platform sling with the steel wire gravity, micro-gap switch through with the contact of gravity switch subassembly connection control drive unit open or close. The utility model discloses a lifting device, when the lift platform contacted ground, the steel wire lost gravity and can't pull movable diverting pulley for movable contact frame triggers micro-gap switch control drive unit stop work, makes the unreeling wheel no longer unreel the steel wire, thereby can effectively avoid article whereabouts to lead to the steel wire to appear relaxing in disorder and the condition of being stuck in lifting device inside after to ground.

Description

Lifting device with microswitch

Technical Field

The utility model relates to an illumination lamps and lanterns elevating gear field, concretely relates to take micro-gap switch's elevating gear.

Background

In order to reduce the maintenance cost of high-altitude lamps, the lamps with the lifting function are widely applied to high-altitude space places such as stages, mines, stadiums, stations, wharfs and the like. The top of the existing high-altitude lamp mostly adopts a single-wire-moving structure lifting device to realize the lifting of the lamp. The single-wire-moving structure lifting device usually adopts a motor to drive an unwinding wheel to rotate, so that a steel wire is wound to realize the lifting function of the high-altitude lamp.

When a lamp descends to the ground, the motor cannot automatically stop operating, the motor continues to drive the unwinding wheel to unwind a steel wire, and the steel wire is loosened and messy in the lifting device, so that the steel wire is easily clamped.

Disclosure of Invention

The utility model aims at solving the not enough of prior art, thereby provide one kind when lamps and lanterns descend the ground motor stop operation avoid the steel wire by the take micro-gap switch's elevating gear.

The utility model adopts the technical proposal that: a lifting device with a microswitch comprises a lifting hanging scaffold, a steel wire unreeling mechanism and a microswitch;

the steel wire unwinding mechanism comprises an unwinding wheel and a driving unit for controlling the unwinding wheel to unwind and unwind steel wires, and the driving unit controls the unwinding wheel to unwind and unwind the steel wires connected with the lifting hanging scaffold to drive the lifting hanging scaffold to lift;

the micro-gap switch be connected with the gravity switch subassembly that is used for the sensation to be connected with the lift platform sling with the steel wire gravity, micro-gap switch through with the contact of gravity switch subassembly connection control drive unit open or close.

Preferably, the gravity switch assembly comprises a guide wheel, a fixed steering wheel, a movable steering pulley and a movable contact frame connected with the microswitch, the movable contact frame is hinged below the driving unit, and the movable steering pulley is arranged on the movable contact frame; the steel wire that unreels the wheel and receive and release is drawn to the activity diverting pulley through guide pulley, fixed diverting pulley to it is swing to drive the activity contact frame through dragging the activity diverting pulley and thus control activity contact frame and micro-gap switch touching or keeping away from.

Preferably, the movable contact frame is provided with a spring at one end connected with the microswitch, and a transmission plate in touch connection with a driving element of the microswitch is arranged at the joint of the movable contact frame and the spring.

Preferably, the movable contact frame is movably hinged below the driving unit, and the movable steering pulley is fixedly arranged on the movable contact frame.

Preferably, the movable diverting pulley is arranged at the right oblique lower part of the fixed diverting pulley, and the top of the movable diverting pulley is connected with the bottom of the fixed diverting pulley in a sliding way.

Preferably, the fixed steerable wheel is provided with a stopper rod for preventing the wire from being displaced on a side with respect to the spring.

Preferably, the guide wheel is arranged on the movable contact frame.

Preferably, the movable contact frame is provided with a platform for supporting a guide wheel at the other end opposite to the spring, and the guide wheel swings along with the movable contact frame.

Preferably, the lifting device further comprises a base, a support is arranged on the base, the steel wire unwinding mechanism, the microswitch and the gravity switch assembly are arranged on the support, a wire outlet hole is formed in the base, and the movable steering pulley is located above the wire outlet hole; the steel wire wound and unwound by the unwinding wheel penetrates out of the wire outlet hole through the movable steering pulley and then is fixedly connected with the lifting hanging scaffold.

Preferably, one end of the spring is connected with the transmission plate of the movable contact frame, and the other end of the spring is connected with the bracket.

Preferably, the fixed steering wheel is fixedly arranged on the bracket, and the movable contact frame is movably hinged on the bracket.

Preferably, the bottom of the lifting platform is provided with a hook for hanging the lamp.

Compared with the prior art, the utility model has the following advantage: the utility model discloses a lifting device is provided with micro-gap switch on its unwinding mechanism, when the lift platform contacted ground, the steel wire lost gravity and can't be dragged movable diverting pulley for the driving plate touching on the movable contact frame to the drive element on the micro-gap switch, trigger micro-gap switch, micro-gap switch control drive unit stop work, make the unwinding wheel no longer unreel the steel wire, thereby can effectively avoid article whereabouts to lead to the steel wire to appear relaxing in disorder and the condition by card in lifting device inside after ground.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a front view of the present invention.

The numbers in the figures indicate:

1-lifting hanging scaffold, 2-steel wire unreeling mechanism, 21-unreeling wheel, 22-driving unit, 221-driving motor, 222-driving controller, 3-microswitch, 31-gravity switch component, 311-guide wheel, 312-fixed steering wheel, 313-movable steering pulley, 314-movable contact frame, 3141-platform, 3142-driving plate, 315-spring, 316-limiting rod, 32-driving element, 4-hook, 5-base, 51-wire outlet hole, 6-support and 7-steel wire.

The specific implementation mode is as follows:

in order to enhance the understanding of the present invention, the following detailed description will be made in conjunction with the embodiments and the accompanying drawings. The utility model discloses the accessible is implemented as follows:

referring to fig. 1-2, a lifting device with a microswitch comprises a lifting platform 1, a steel wire unreeling mechanism 2 and a microswitch 3. The steel wire unwinding mechanism 2 comprises an unwinding wheel 21 and a driving unit 22 for controlling the unwinding wheel 21 to unwind and unwind steel wires, and the driving unit 22 controls the unwinding wheel 21 to unwind and unwind the steel wires 7 connected with the lifting platform sling 1 so as to drive the lifting platform sling 1 to lift. The bottom of the lifting hanging scaffold 1 is provided with a hook 4 for hanging lamps, and the hook can be used for hanging lamps. The driving unit 22 includes a driving motor 221 and a driving controller 222, and mainly controls the driving motor 221 to rotate forward, backward, and stop. The microswitch 3 is a common microswitch on the market, and the working principle is as follows: the external mechanical force acts on the action reed through a transmission element (a press pin, a button, a lever, a roller and the like), and when the action reed is displaced to a critical point, instantaneous action is generated, so that a movable contact at the tail end of the action reed is quickly connected with or disconnected from a fixed contact. The micro switch 3 is connected with a gravity switch component 31 used for sensing the gravity of a steel wire connected with the lifting hanging scaffold 1, and the micro switch 3 is in touch connection with the gravity switch component 31 to control the on or off of the driving unit 22. When the gravity switch assembly 31 is not touched with the micro switch 3, the driving unit 22 is powered on; when the gravity switch assembly 31 touches the micro switch 3, the micro switch 3 controls the driving unit 22 to stop working.

The lifting device further comprises a base 5, a support 6 is arranged on the base 5, the steel wire unwinding mechanism 2 and the microswitch 3 are arranged on the support 6, a wire outlet hole 51 is formed in the base 5, and a steel wire wound and unwound by the unwinding wheel 21 penetrates through the wire outlet hole 51 and then is fixedly connected with the lifting hanging scaffold 1. When lifting platform 1 contacts ground, the steel wire loses gravity and makes gravity switch subassembly 31 touch to micro-gap switch 3, and micro-gap switch 3 control drive unit stops the operation for unreeling wheel 21 no longer unreels the steel wire, thereby can effectively avoid article whereabouts to lead to the steel wire to appear relaxing in disorder and the condition of being blocked in elevating gear after to ground.

The gravity switch assembly 31 comprises a guide wheel 311, a fixed steering wheel 312, a movable steering pulley 313 and a movable contact frame 314 connected with a microswitch, wherein the movable contact frame 314 is movably hinged below the driving unit, and the movable steering pulley 313 is arranged on the movable contact frame 314; the steel wire 7 wound and unwound by the unwinding wheel 21 is pulled to the movable steering pulley 313 through the guide wheel 311 and the fixed steering wheel 312, and the movable contact frame 314 is driven to swing by pulling the movable steering pulley 313, so that the micro switch 3 is controlled to be turned on or turned off. A spring 315 is connected to one end of the movable contact frame 314 close to the micro switch, and a transmission plate 3142 in touch connection with the driving element 32 of the micro switch 3 is arranged at the connection position of the movable contact frame 314 and the spring 315. One end of the spring 315 is connected with the transmission plate 3142 of the movable contact frame 314, and the other end is connected with the bracket 6. When the transmission plate 3142 touches the driving element 32 of the micro switch, the driving motor 221 stops working; when the transmission plate 3142 contacts the drive element 32 of the microswitch, the drive motor 221 stops operating.

The movable diverting pulley 313 is arranged at the right oblique lower part of the fixed diverting pulley 312, so that when the steel wire pulls the movable diverting pulley 313 by gravity, the movable diverting pulley 313 can move forwards, and the movable diverting pulley 313 drives the movable contact frame 314 to swing forwards because the movable diverting pulley 313 is fixedly arranged on the movable contact frame 314. When a heavy object on the lifting hanging scaffold 1 descends, the steel wire is pressed downwards to pull the movable steering pulley 313 under the action of gravity, the movable steering pulley 313 drives the movable contact frame 314 to swing forwards (namely the transmission plate 3142 of the movable contact frame 314 is far away from the driving element 32 of the microswitch 3), the microswitch 3 controls the driving motor 221 to be powered on, and the driving motor 221 controls the unreeling wheel 21 to unreel the steel wire; when the heavy object on the lifting hanging scaffold 1 descends to the ground, the steel wire loses gravity, the movable steering pulley 313 is not pressed down any more, the movable contact frame 314 resets, the transmission plate 3142 of the movable contact frame 314 is contacted with the driving element 32 of the microswitch 3, the microswitch 3 controls the power-off of the driving motor 221, the driving motor 221 stops working, and the unwinding wheel 21 does not unwind the steel wire any more.

The top of the movable diverting pulley 313 is connected with the bottom of the fixed diverting pulley 312 in a sliding way, and the design can limit the back-and-forth movement track of the movable diverting pulley 313 and prevent deviation; and can effectively prevent the deviation of the steel wire in the process of entering the wire outlet hole 51 after being unreeled from the unreeling wheel 21, and ensure that the articles on the lifting hanging scaffold 1 are in a vertical state.

The fixed steering wheel 312 is provided with a limiting rod 316 for preventing the steel wire from shifting at the side opposite to the spring, and the limiting rod 316 can effectively prevent the steel wire from being separated from the fixed steering wheel 312. The guide wheel 311 is disposed on the movable contact frame 314. The movable contact frame 314 is provided with a platform 3141 for supporting the guide wheel 311 at the other end opposite to the spring, and the guide wheel 311 swings together with the movable contact frame 314.

The working principle is as follows: the steel wire wound and unwound by the unwinding wheel 21 is drawn to the movable steering pulley 313 through the guide wheel 311 and the fixed steering wheel 312, passes through the wire outlet hole 51 through the movable steering pulley 313, and is fixedly connected with the lifting platform 1. When an article hung on the lifting hanging scaffold 1 needs to descend, the article pulls a steel wire, the steel wire is pressed down by gravity to pull the movable steering pulley 313, the movable steering pulley 313 drives the movable contact frame 314 to swing forwards, the transmission plate 3142 on the movable contact frame 314 is not in contact with the microswitch 3, the microswitch 3 controls the driving motor 221 to be powered on for operation, and the unreeling wheel 21 unreels the steel wire; when the article falls to the ground, the steel wire loses gravity, the movable contact frame 314 resets, the transmission plate 3142 on the movable contact frame 314 is in contact with the driving element 32 of the microswitch 3, the microswitch 3 controls the driving motor 221 to be powered off to stop operation, and the unwinding wheel 21 stops unwinding the steel wire; when the lifting platform 1 needs to ascend again, the driving motor 221 is started only by remote control, the unreeling wheel 21 is used for reeling steel wires, and the lifting platform 1 ascends.

Finally, it should be noted that: the above description is only for the preferred embodiment of the present invention and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A lifting device with a microswitch is characterized by comprising a lifting hanging scaffold (1), a steel wire unreeling mechanism (2) and a microswitch (3);

the steel wire unreeling mechanism (2) comprises an unreeling wheel (21) and a driving unit (22) for controlling the unreeling wheel (21) to unreel and unreel steel wires, and the driving unit (22) controls the unreeling wheel (21) to unreel the steel wires connected with the lifting hanging scaffold (1) to drive the lifting hanging scaffold (1) to lift;

micro-gap switch (3) be connected with gravity switch subassembly (31) that are used for the sensation to be connected with lift platform sling (1), micro-gap switch (3) through with gravity switch subassembly (31) touching the opening or closing of connection control drive unit (22).

2. The lifting device with the microswitch as in claim 1, wherein the gravity switch assembly (31) comprises a guide wheel (311), a fixed steering wheel (312), a movable steering pulley (313) and a movable contact frame (314) in touch connection with the microswitch (3); the steel wire wound and unwound by the unwinding wheel (21) is pulled to the movable steering pulley (313) through the guide wheel (311) and the fixed steering wheel (312), and the movable contact frame (314) is driven to swing by pulling the movable steering pulley (313), so that the movable contact frame (314) is controlled to touch or be far away from the microswitch (3).

3. The lifting device with the microswitch as in claim 2, wherein the movable contact frame (314) is connected with a spring (315) at one end close to the microswitch, and the movable contact frame (314) is provided with a transmission plate (3142) in touch connection with the driving element (32) of the microswitch (3) at the connection part of the movable contact frame (314) and the spring (315).

4. A lifting device with microswitch as in claim 3, wherein the movable contact frame (314) is movably hinged under the driving unit, and the movable diverting pulley (313) is fixedly arranged on the movable contact frame (314).

5. A lifting device with microswitch as in claim 4, characterized in that the movable diverting pulley (313) is arranged obliquely right below the fixed diverting pulley (312); the top of the movable diverting pulley (313) is connected with the bottom of the fixed diverting pulley (312) in a sliding way.

6. The lifting device with the microswitch as in claim 3, 4 or 5, wherein the fixed steering wheel (312) is provided with a limiting rod (316) for preventing the wire from being displaced at a side opposite to the spring (315).

7. A lifting device with microswitch as in claim 3 or 4 or 5, characterized in that the guide wheel (311) is arranged on the movable contact frame (314).

8. The lifting device with the microswitch as in claim 7, wherein the movable contact frame (314) is provided with a platform (3141) for supporting the guide wheel (311) at the other end opposite to the spring (315), and the guide wheel (311) swings together with the movable contact frame (314).

9. The lifting device with the microswitch as in claim 2, 3, 4, 5 or 8, further comprising a base (5), wherein a support (6) is arranged on the base (5), the wire unwinding mechanism (2), the microswitch (3) and the gravity switch assembly (31) are arranged on the support (6), a wire outlet hole (51) is arranged on the base (5), and the movable diverting pulley (313) is positioned above the wire outlet hole (51); the steel wire wound and unwound by the unwinding wheel (21) passes through the wire outlet hole (51) through the movable diverting pulley (313) and then is fixedly connected with the lifting hanging scaffold (1).

10. The lifting device with the microswitch as in claim 9, wherein the fixed steering wheel (312) is fixedly arranged on a bracket, and the movable contact frame (314) is movably hinged on the bracket (6).