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CN-121990437-A - Freight elevator with car anti-falling braking mechanism

CN121990437ACN 121990437 ACN121990437 ACN 121990437ACN-121990437-A

Abstract

The invention belongs to the technical field of elevator anti-falling, and particularly relates to a cargo lift with a lift car anti-falling braking mechanism, which comprises a cargo platform, safety tongs, a traction rod, a sleeve, a speed limiting index and auxiliary clamps, wherein the cargo platform is arranged at the bottom of a lift car and is used for carrying passengers, guide rails are arranged at two sides of the cargo platform, the two safety tongs are arranged at the bottom of the cargo platform, lifting link mechanisms for triggering linkage are arranged on the side surfaces of the safety tongs and are used for enabling the safety tongs to grasp the guide rails, the traction rod is arranged between the two safety tongs, two ends of the traction rod are respectively connected with the lifting link mechanisms on the safety tongs, the sleeve is arranged at one side of the lifting link mechanisms and is used for limiting the movement range of the lifting link mechanisms, and the sleeve is sleeved outside the speed limiting index and forms sliding fit with the lifting link mechanisms. The invention can realize double-stage braking, ensure the quick and synchronous response of a plurality of groups of braking units when triggering, prolong the safety margin, ensure reliable parking in a preset distance and ensure the safety of personnel and equipment.

Inventors

  • WANG SHUYING
  • Jiang Tiesong

Assignees

  • 沈阳三洋电梯有限公司

Dates

Publication Date
20260508
Application Date
20260410

Claims (10)

  1. 1.A cargo lift with a car anti-falling braking mechanism is characterized by comprising The cargo carrying platform is arranged at the bottom of the lift car and used for carrying passengers, and guide rails are arranged on two sides of the cargo carrying platform; the safety tongs are arranged at the bottom of the cargo carrying platform, and the side surfaces of the safety tongs are provided with lifting link mechanisms for triggering linkage and used for driving the safety tongs to grasp the guide rail; The traction rod is arranged between the two safety tongs, and two ends of the traction rod are respectively connected with the lifting link mechanisms on the safety tongs; A sleeve disposed on one side of the rising link mechanism, the sleeve being for restricting a movement range of the rising link mechanism; The sleeve is sleeved outside the speed limiting index to form sliding fit with the speed limiting index, and when the car is overspeed down, the speed limiting index triggers the action of the lifting link mechanism along with the sleeve and triggers the safety tongs to link through the traction rod; the auxiliary clamp is arranged at the bottom of the safety clamp and synchronously clamps the guide rail along with the movement of the safety clamp, and the safety clamp and the auxiliary clamp form a double-stage braking clamping structure.
  2. 2. The freight elevator with car anti-falling braking mechanism of claim 1, wherein the cross section of the guide rail is of a T-shaped structure, the guide rail is longitudinally arranged on one side of the safety tongs and is provided with a guide head, and the side surface of the guide head is provided with a buffer groove.
  3. 3. The freight elevator with car anti-falling braking mechanism of claim 2, wherein the safety tongs comprise a mounting base, clamping plates which are oppositely arranged are arranged in the mounting base, two clamping cavities are formed between the two clamping plates, the two clamping cavities are symmetrically distributed, the clamping cavities are wedge-shaped rails which are obliquely upwards arranged, and lifting clamping jaws which slide along the rails are arranged in the clamping cavities.
  4. 4. The freight elevator with car anti-falling braking mechanism of claim 3, wherein the lifting connecting rod mechanism comprises a transmission shaft rod transversely inserted on the mounting base, a first hinged support is fixed at one end of the transmission shaft rod, a hinged head is movably connected with the traction rod in an extending mode at the bottom of the first hinged support, an extension arm plate is further arranged on the annular side of the first hinged support and fixedly connected with the sleeve, and the extension arm plate moves along with the sleeve to drive the first hinged support to rotate around the transmission shaft rod so as to link the traction rod.
  5. 5. The freight elevator with car anti-falling braking mechanism as set forth in claim 4, wherein a transmission clamping tongue is fixedly installed in the middle of the transmission shaft rod, two shaft seats for hinging are formed at the end parts of the transmission clamping tongue, a lifting pull rod is rotatably connected to the shaft seats, the lifting pull rod is vertically downward, and the bottom end of the lifting pull rod is rotatably connected with the lifting clamping jaw.
  6. 6. The freight elevator with car anti-falling braking mechanism of claim 4, wherein a second hinged support is installed at one end of the transmission shaft rod, which is away from the first hinged support, a tension spring is installed on the second hinged support, a reset pull rod is fixed on the installation base at a position matched with the tension spring, and the bottom end of the tension spring is hooked on the reset pull rod.
  7. 7. The cargo lift with the car anti-falling braking mechanism according to claim 3, wherein the auxiliary clamp comprises a fixed support, the fixed support is arranged below the installation base and is connected with the installation base through a fixed piece, an assembly plate is symmetrically fixed below the fixed support, silos are vertically arranged on the assembly plate along the plate surface, compression springs are arranged in the silos, and a pressing plate is arranged at the opening end of each silo; the compression spring is in a state of being compressed and to be released, and when the pressing plate is opened, the compression spring axially pops up along the silo.
  8. 8. The freight elevator with car anti-falling braking mechanism according to claim 7, wherein one surface of the pressing plate extends towards the axis of the silo and inclines to form an inclined plate, the pressing plate and the inclined plate are distributed in an annular array, the inclined plate is gathered at the center axis of the silo, a pull handle is fixed at the gathering position of the inclined plate, and the end part of the pull handle is obliquely tilted upwards; and a folding line is arranged at the connecting and fixing position of the pressing plate and the silo, and when the pull handle is pulled by external force, the folding line enables the pressing plate to break along the preset direction when being stressed.
  9. 9. The freight elevator with car fall prevention braking mechanism as set forth in claim 8, wherein the auxiliary clamp further comprises a connecting handle, the connecting handle is fixed at the bottom of the lifting clamping jaw, the two connecting handles are oppositely inclined and bent and extend downwards to form a pressed handle, and one end of the lifted pull handle is fixed with the pressed handle; The connecting handle moves upwards synchronously with the lifting clamping jaw.
  10. 10. The freight elevator with car fall prevention braking mechanism as set forth in claim 9, wherein the pressure handle is provided with a buffer convex surface facing the guide head, and adapted to the buffer groove.

Description

Freight elevator with car anti-falling braking mechanism Technical Field The invention belongs to the technical field of elevator anti-falling, and particularly relates to a cargo lift with a lift car anti-falling braking mechanism. Background The elevator is used as the core equipment for vertical transportation, the operation safety of the elevator is directly related to the life and property safety of passengers and the reliability of cargo transportation, in particular to a cargo elevator, because the cargo elevator has large load and complex operation working conditions (such as cargo loading and unloading impact, uneven load and the like), higher requirements are put on the reliability and redundancy of a safety braking system, and an anti-falling braking mechanism is the last and most critical mechanical guarantee in the elevator safety system and has the function of preventing overspeed falling accidents of a car under the extreme conditions of failure of an elevator control system, insufficient power of a traction mechanism and the like. The existing elevator safety tongs braking system mainly depends on a single-stage triggering and clamping mechanism, and the common working principle is that when the running speed of a car exceeds the rated speed limit, a speed limiter acts, an operating mechanism of the safety tongs is pulled through a steel wire rope or a connecting rod system to enable a wedge block or a tongs body of the safety tongs to be in contact with a guide rail and generate friction force, so that emergency braking of the car is realized. In summary, the above-mentioned problems may be that the braking actions are not synchronous, the braking margin is insufficient to generate additional torsional load, which may impact the car frame and the guide rail system, or the secondary braking lacks effective triggering conditions after the primary braking is effective, and the like, so that the graded and progressive braking effect cannot be achieved, and the safety redundancy is not substantially improved, so that the braking system needs to have a wider braking force adaptation range and a more reliable progressive clamping capability. Disclosure of Invention The invention aims to provide a cargo lift with a car anti-falling braking mechanism, which can realize double-stage braking, ensure quick and synchronous response of a plurality of groups of braking units during triggering, prolong safety margin, ensure reliable parking within a preset distance and ensure safety of personnel and equipment. The technical scheme adopted by the invention is as follows: The utility model provides a cargo lift with car anti-falling braking mechanism, includes cargo platform, safety tongs, traction lever, sleeve, speed limit index and auxiliary clamp, the cargo platform disposes the bottom at the car and is used for carrying passengers, the both sides of cargo platform are provided with the guide rail, two the safety tongs are a pair of, two the safety tongs are provided with the bottom at cargo platform, the side of safety tongs is provided with the rising link mechanism that triggers the linkage for order about the safety tongs to grasp the guide rail, the traction lever disposes between two the safety tongs, its both ends connect respectively in rising link mechanism on the safety tongs, the sleeve disposes one side at rising link mechanism, the sleeve is used for limiting rising link mechanism's range of motion, the sleeve cover is located the outside of speed limit index, forms sliding fit with it, and when the car overspeed down, the speed limit index triggers rising link mechanism's action along with the sleeve to trigger the safety tongs through the traction lever, auxiliary clamp disposes the bottom at the safety tongs, along with safety tongs synchronous clamp guide rail, safety tongs and auxiliary clamp form the auxiliary clamp and stop-down structure. In a preferred scheme, the cross section of guide rail is T shape structure, the guide rail vertically sets up in the one side of safety tongs and is the guide head, the buffer tank has been seted up to the side of guide head. In a preferred scheme, the safety tongs comprise a mounting base, clamping plates which are oppositely arranged are arranged in the mounting base, two clamping cavities are formed between the two clamping plates and are symmetrically distributed, the clamping cavities are wedge-shaped rails which are obliquely upwards arranged, and lifting clamping jaws which slide along the rails are arranged in the clamping cavities. In a preferred scheme, the lifting link mechanism comprises a transmission shaft rod transversely inserted on the mounting base, a first hinged support is fixed at one end of the transmission shaft rod, a hinged head is extended from the bottom of the first hinged support and is movably connected with the traction rod, an extension arm plate is further arranged on the annular side of the first hinged support, th