CN211569802U

CN211569802U - Speed limiting device of elevator

Info

Publication number: CN211569802U
Application number: CN201922268456.7U
Authority: CN
Inventors: 徐志伟; 边会丽; 徐长岭
Original assignee: Qingdao Qingfang Construction And Installation Group Co ltd
Current assignee: Qingdao Qingfang Construction And Installation Group Co ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-09-25
Anticipated expiration: 2029-12-16

Abstract

A speed limiting device of a hoist relates to the technical field of building material transportation and comprises a vertical frame and a hopper clamped on the vertical frame and sliding vertically, wherein a winch is arranged at the lower end of the vertical frame, and the end part of a steel wire rope on the winch bypasses a fixed pulley at the upper end of the vertical frame and is fixedly connected with the hopper; the vertical frame is vertically connected with a safety rope, a clamping mechanism is arranged on the side face, facing the vertical frame, of the hopper, the clamping mechanism comprises a pair of clamping wheels, the mandrel of each clamping wheel is parallel to the mandrel of each clamping wheel, the two clamping wheels cannot rotate and can move transversely and oppositely, and the safety rope penetrates between the two clamping wheels. The device can play the effect of buffering speed reduction, makes the hopper have certain buffering time, reduces the inertial force of hopper, guarantees the security of material transportation.

Description

Speed limiting device of elevator

Technical Field

The utility model relates to a building material transportation technical field, concretely relates to lifting machine speed limiting device.

Background

The material lifting machine is a fixing device's mechanical conveying equipment, mainly be applicable to the likepowder, the continuous vertical lift of graininess and fritter material, in the use, the material lifting machine is provided with safety device usually, this safety device is generally being provided with the power-off action device for electromagnetic brake or on promoting the organism, when the lifting machine transportation breaks down, die the hoist engine lock or directly die the lock to promoting the organism, hopper speed snap falls to 0, the material in the hopper has very big inertial force this moment, when placing fragile article such as glass or ceramic tile in the hopper, very easily by inertial force "squat the bits of broken dregs, broken dregs flows down from the hopper, cause the secondary injury.

Disclosure of Invention

In order to solve the problems of the prior art, the utility model provides a lifting machine speed limiting device, the device can play the effect that the buffering slows down, makes the hopper have certain buffering time, reduces the inertial force of hopper, guarantees the security of material transport.

The purpose of the utility model can be realized by the following technical proposal: a speed limiting device of a hoist comprises a vertical frame and a hopper clamped on the vertical frame and sliding vertically, wherein a winch is installed at the lower end of the vertical frame, and the end part of a steel wire rope on the winch bypasses a fixed pulley at the upper end of the vertical frame and then is fixedly connected with the hopper; the vertical frame is vertically connected with a safety rope, a clamping mechanism is arranged on the side face, facing the vertical frame, of the hopper, the clamping mechanism comprises a pair of clamping wheels, the mandrel of each clamping wheel is parallel to the mandrel of each clamping wheel, the two clamping wheels cannot rotate and can move transversely and oppositely, and the safety rope penetrates between the two clamping wheels.

Preferably, torsion springs are sleeved between the wheel holes of the two clamping wheels and the wheel shaft, the rotating directions of the torsion springs are opposite, one ends of the torsion springs are inserted into the inner hole wall, and the other ends of the torsion springs are inserted into the wheel shaft; the vertical column faces the hopper direction, the rotating direction of the torsion spring on the left side is clockwise, and the rotating direction of the torsion spring on the right side is anticlockwise. When the hopper descends and exceeds speed limit, the clamping wheels are close to each other to clamp the safety rope, the pressing force acting on the safety rope is larger, the extruding positions of the two clamping wheels are subjected to upward friction force, the friction force enables the clamping wheels to rotate, during rotation, the torsion force of the torsion spring can balance partial friction force, the descending acceleration of the hopper is not too fast, when the torsion force of the torsion spring is balanced with the friction force, the hopper is decelerated to 0, and the buffering deceleration is completed.

Preferably, the wheel surface of the clamping wheel is coated with a ring of rubber rings with teeth. The rubber ring with teeth can increase the friction force of the two clamping wheels when clamping the safety rope, thereby playing a better role in limiting speed and preventing falling and further improving the safety coefficient.

Preferably, clamping mechanism includes the slide rail install a double threaded screw in the slide rail double threaded screw's both ends difference threaded connection has two sliders, the slider can slide in the slide rail, and two tight pulleys of clamp are installed respectively on two sliders double threaded screw's tip still installs the motor. When the motor is started, the double-end screw rod rotates, and the clamping wheel can move relatively under the drive of the sliding block to clamp the safety rope.

Preferably, a speed measuring module is installed on the safety rope, the safety rope penetrates through the speed measuring module, the speed measuring module is communicated with the controller, and the controller is communicated with the motor switch. The speed measuring module can detect the slip velocity of the hopper relative to the safety rope, and once the slip velocity exceeds the range value of a normal value, the speed measuring module transmits a signal to the controller, the controller controls the motor to start, and the clamping wheels clamp the safety rope for buffering and decelerating.

The utility model discloses the combined effect who brings includes: the utility model has the advantages of simple and reasonable structure, convenient to use, tight pulley ability relative motion, consequently when the hopper tenesmus is overspeed, tight pulley is close to each other and presss from both sides tight safety rope, and the clamp force that is used in safe ascending is bigger and bigger, makes the decline of hopper have the buffering of a segment time to can reduce the inertial force of hopper, can not the slump be zero, ensure the security of material transportation.

Drawings

Fig. 1 is a schematic side view of an embodiment of the present invention.

Fig. 2 is a schematic view of the structure in the direction a in fig. 1.

Fig. 3 is a schematic diagram of the structure at B in fig. 2.

Fig. 4 is a schematic view of the track structure in fig. 3.

FIG. 5 is a schematic view of the mounting structure of the pinch wheel and torsion spring.

Wherein like parts are designated by like reference numerals throughout the several views; the figures are not drawn to scale.

Detailed Description

The invention is further described with reference to the following figures and examples.

Examples

A speed limiting device of a hoist comprises a vertical frame 1 and a hopper 2 clamped on the vertical frame 1 and sliding vertically, wherein a winch 3 is arranged at the lower end of the vertical frame 1, and the end part of a steel wire rope on the winch 3 is fixedly connected with the hopper 2 after bypassing a fixed pulley 4 at the upper end of the vertical frame 1; the vertical frame 1 is vertically connected with a safety rope 5, a clamping mechanism 6 is arranged on the side face, facing the vertical frame 1, of the hopper 2, the clamping mechanism 6 comprises a pair of clamping wheels 7 with mandrels arranged in parallel, the two clamping wheels 7 cannot rotate and can move transversely and oppositely, and the safety rope 5 penetrates between the two clamping wheels 7. The wheel surface of the clamping wheel 7 is covered with a toothed rubber ring 71. The rubber ring 71 with teeth can increase the friction force of the two clamping wheels 7 when clamping the safety rope 5, thereby playing a better role in limiting speed and preventing falling and further improving the safety coefficient.

Torsion springs 8 are sleeved between wheel holes of the two clamping wheels 7 and the wheel shaft, the rotating directions of the torsion springs 8 are opposite, one ends of the torsion springs 8 are inserted into the inner hole wall, and the other ends of the torsion springs 8 are inserted into the wheel shaft; the vertical column faces the hopper 2, the rotating direction of the torsion spring 8 on the left side is clockwise, and the rotating direction of the torsion spring 8 on the right side is anticlockwise. When the hopper 2 falls down and exceeds the speed limit, the clamping wheels 7 are close to each other to clamp the safety rope 5, the pressing force acting on the safety rope 5 is larger, the extruding positions of the two clamping wheels 7 are subjected to upward friction force, the clamping wheels 7 are rotated by the friction force, during rotation, the torsion force of the torsion spring 8 can balance partial friction force, the descending acceleration of the hopper 2 is not too fast, when the torsion force of the torsion spring 8 is balanced with the friction force, the hopper 2 is decelerated to 0, and the buffering and deceleration are completed.

Clamping mechanism 6 includes slide rail 9 install a double-threaded screw 10 in the slide rail 9 the both ends of double-threaded screw 10 threaded connection respectively have two sliders 11, slider 11 can slide in the slide rail 9, and two pinch rollers 7 are installed respectively on two sliders 11 motor 12 is still installed to the tip of double-threaded screw 10. When the motor 12 is started, the double-thread screw 10 rotates, and the clamping wheel 7 can move relatively under the drive of the sliding block 11 to clamp the safety rope 5.

Install the module 13 that tests the speed on the safety rope 5, safety rope 5 passes the module 13 that tests the speed, the module 13 that tests the speed communicates with the communication of controlling slide rail 9 controller, controller 14 with the communication of motor 12 switch communicates. The speed measuring module 13 can detect the sliding speed of the hopper 2 relative to the safety rope 5, once the sliding speed exceeds the normal value range value, the speed measuring module 13 transmits a signal to the controller 14, the controller 14 controls the motor 12 to start, and the clamping wheel 7 clamps the safety rope 5 for buffering and decelerating.

The embodiment of the utility model provides a comprehensive effect brought includes: the utility model has the advantages of simple and reasonable structure, convenient to use, tight pulley 7 can relative motion, consequently when hopper 2 tenesmus is overspeed, tight pulley 7 is close to each other and presss from both sides tight safety rope 5, and the clamp force that is used in safe ascending is bigger and bigger, makes the decline of hopper 2 have the buffering of a segment time to can reduce the inertia force of hopper 2, can not the slump be zero, ensure the security of material transportation.

The structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the purpose which can be achieved by the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

The present invention has been described above with reference to the preferred embodiments, but the scope of protection of the present invention is not limited thereto, and all technical solutions falling within the scope of the claims are within the scope of protection of the present invention. Various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict.

Claims

1. A speed limiting device of a hoist is characterized by comprising a vertical frame and a hopper clamped on the vertical frame and sliding vertically, wherein a winch is installed at the lower end of the vertical frame, and the end part of a steel wire rope on the winch bypasses a fixed pulley at the upper end of the vertical frame and then is fixedly connected with the hopper; the vertical frame is vertically connected with a safety rope, a clamping mechanism is arranged on the side face, facing the vertical frame, of the hopper, the clamping mechanism comprises a pair of clamping wheels, the mandrel of each clamping wheel is parallel to the mandrel of each clamping wheel, the two clamping wheels cannot rotate and can move transversely and oppositely, and the safety rope penetrates between the two clamping wheels.

2. The speed limiting device of the hoisting machine as claimed in claim 1, wherein torsion springs are sleeved between the wheel holes of the two clamping wheels and the wheel axle, the rotation directions of the torsion springs are opposite, one end of each torsion spring is inserted into the inner hole wall, and the other end of each torsion spring is inserted into the wheel axle; the vertical column faces the hopper direction, the rotating direction of the torsion spring on the left side is clockwise, and the rotating direction of the torsion spring on the right side is anticlockwise.

3. The elevator governor of claim 1, wherein the sheave surface of the gripping wheel is coated with a toothed rubber ring.

4. The elevator speed limiting device according to claim 2, wherein the clamping mechanism comprises a slide rail, a double-threaded screw is installed in the slide rail, two sliding blocks are respectively connected to two ends of the double-threaded screw in a threaded manner, the sliding blocks can slide in the slide rail, two clamping wheels are respectively installed on the two sliding blocks, and a motor is further installed at the end of the double-threaded screw.

5. The elevator speed limiting device according to claim 4, wherein a speed measuring module is mounted on the safety rope, the safety rope passes through the speed measuring module, the speed measuring module is communicated with a controller, and the controller is communicated with the motor switch.