CN211338415U

CN211338415U - Mechanical trigger device

Info

Publication number: CN211338415U
Application number: CN201921065758.8U
Authority: CN
Inventors: 本村和彦; 胡永刚
Original assignee: Ningbo Yuanji Intelligent Technology Co ltd Suzhou Branch
Current assignee: Suzhou Puletai Automatic Control Technology Co ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-08-25
Anticipated expiration: 2029-07-09

Abstract

The utility model provides a mechanical trigger device, it includes: rope sheave subassembly, pituitary subassembly, dog subassembly, pawl subassembly. In the mechanical trigger device of the utility model, the pituitary moves linearly in the process of speed-limiting operation; when the pituitary triggers the mechanical screw, the striking rod on the pituitary and the screw on the stop block do not have an included angle.

Description

Mechanical trigger device

Technical Field

The utility model relates to an elevator technical field especially relates to a mechanical trigger device.

Background

The speed limiter is one of safety control components in an elevator safety protection system. When the elevator runs, the elevator car is overspeed due to any reason, and even the elevator runs in a falling danger. At the moment, after the main machine fails, the speed limiter of the safety part of the elevator acts, the linkage lifting structure is linked with the safety tongs, and the car (counterweight) is stopped on the guide rail.

However, the existing speed governor rope pulley and the existing ratchet wheel are two separated parts, the number of the integral parts of the speed governor is increased, the existing speed governor ratchet wheel device is connected through a welding process, and instability in the welding process can cause instability of the ratchet wheel device. In addition, after the electric trigger fails, the speed limiter continues to run in an overspeed mode, mechanical action is triggered after a certain speed (equal to spring force), and an included angle also exists in a pituitary assembly when the mechanical action is triggered, so that the speed of the electric trigger is influenced. Therefore, it is necessary to provide a further solution to the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a mechanical trigger device to overcome the not enough that exists among the prior art.

In order to solve the technical problem, the technical scheme of the utility model is that:

a mechanical trigger device, comprising: the rope wheel component, the pituitary component, the stop block component and the pawl component;

the sheave assembly includes: the rope wheel comprises a rope wheel body and convex teeth arranged on the peripheral edge of one side wall surface of the rope wheel body; the pituitary assembly comprises: the striking rod is arranged on the axial outer side surface of the pituitary body and triggers the stop block assembly along with the centrifugally moving pituitary body; the stop block subassembly distribute in the border position of rope sheave body, it includes: the pawl component comprises a stop block and a screw arranged on the end face of one end of the stop block, wherein the end face of the other end of the stop block presses the pawl component, and the screw is separated from the pawl component when triggered by the pituitary.

As the utility model discloses a mechanical trigger device's improvement, arbitrary dogtooth forms an engagement point, and a plurality of dogteeth are followed rope sheave body circumference equidistant distribution, the angle value of the central angle that the circular arc between the adjacent dogtooth corresponds is at most 20.

As the utility model discloses a mechanical trigger device's improvement, be provided with the first waist hole that radial extension set up on the rope sheave body, the pituitary passes through the bearing edge on it first waist hole slides and sets up, and follows the pivot of rope sheave body carries out centrifugal motion.

As the utility model discloses a mechanical trigger device's improvement, the pituitary subassembly is two, two pituitary subassemblies central symmetry distribute in on the rope sheave body.

As the utility model discloses a mechanical trigger device's improvement, screw vertically ground spiro union in the screw of terminal surface, the terminal surface of the dog other end be one with the sunken arcwall face of pawl subassembly looks adaptation.

As an improvement of the mechanical triggering device of the present invention, the stop pivotally disengages from the pawl assembly when the screw is triggered by the pituitary.

As the utility model discloses a mechanical trigger device's improvement, mechanical trigger device still includes the support, and it includes: the rope wheel assembly, the pituitary assembly, the stop block assembly and the pawl assembly are integrated on the bracket.

Compared with the prior art, the beneficial effects of the utility model are that: in the mechanical trigger device of the utility model, the pituitary moves linearly in the process of speed-limiting operation; when the pituitary triggers the mechanical screw, the striking rod on the pituitary and the screw on the stop block do not have an included angle.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic perspective view of the mechanical trigger device of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

As shown in fig. 1, the utility model provides a mechanical trigger device, it has small, light in weight, and can effectively limit the speed, advantage of braking. The mechanical trigger device includes: the device comprises a bracket 1, a rope wheel component 2, a pituitary component 3, a stop component 4 and a pawl component 5.

The support 1 is used for providing the basis for the installation of other subassemblies is fixed, support 1 includes: a bottom plate 11 and side surfaces 12 extending from both side edges of the bottom plate 11 and held in opposed arrangement.

The sheave assembly 2 includes: a rope wheel body 21 and convex teeth 22 arranged on the periphery of one side wall surface of the rope wheel body 21.

The sheave body 21 can perform pivotal motion with its own central axis as a rotating shaft 211, and a circumferential surface thereof has a groove for assisting the wire rope to pass around. Under the action of friction force, the rope wheel body 21 can generate tension on a steel wire rope wound on the rope wheel body. In order to facilitate the movement of the sheave body 21, the center positions of the two side wall surfaces of the sheave body 21 are pivotally connected to the two side surfaces 12 through a rotating shaft 211, and correspondingly, the two side surfaces 12 are provided with through holes 121 through which the rotating shaft 211 passes. Preferably, the through hole 121 is a slot structure opened at an upper edge of the side surface 12 and capable of being in interference fit with the rotating shaft 211. Meanwhile, a ball bearing for assisting the rotating shaft 211 of the rope pulley body 21 is further arranged between the rotating shaft 211 and the rope pulley body 21.

The teeth 22 are adapted to engage the pawl assembly 5. The number of the convex teeth 22 is multiple, any one of the convex teeth 22 forms a meshing point, and the multiple convex teeth 22 are distributed at equal intervals along the circumferential direction of the rope pulley body 21. Preferably, the circular arcs between adjacent teeth 22 correspond to central angles having a value of at most 20 °. So arranged, the rope pulley body 21 can quickly form linkage relation with the pawl component 5.

The lobe assembly 3 is used to activate the stop assembly 4 to effect engagement between the pawl assembly 5 and the cam 22 on the sheave body 21. Specifically, the pituitary assembly 3 is slidably mounted on the sheave body 21, and includes: a pituitary body 31 and a striking rod 32 arranged on the pituitary body 31. The rope pulley body 21 is provided with a waist hole extending in the radial direction, and the pituitary 31 is arranged along the waist hole in a sliding manner through a bearing on the pituitary 31 and performs centrifugal motion along with the pivoting of the rope pulley body 21.

The striking rod 32 is disposed on the axial outer side surface 12 of the pituitary body 31. So that the radius of motion of the lobe body 31 gradually increases with the centrifugal motion of the lobe body 31, and the striking rod 32 can collide with the stop block assembly 4 to trigger the centrifugal motion.

In one embodiment, there are two lobe members 3, and the two lobe members 3 are symmetrically distributed on the sheave body 21. Thus, when performing centrifugal motion, the radial distance of the lobes 31 in the two lobe assemblies 3 increases gradually, which facilitates a fast mechanical triggering.

The stop block assembly 4 is used for braking the pawl assembly 5, is mounted on the bracket 1, and is distributed at the edge position of the rope wheel body 21, and the stop block assembly 4 comprises: a stop block 41 and a screw 42 provided on an end surface of one end of the stop block 41. The screw 42 is vertically screwed into the screw hole of the end face, the stop block 41 is pivotally mounted on the side face 12 of the bracket 1, and the end face of the other end of the stop block 41 is a concave arc-shaped face to be matched with the pawl assembly 5.

When the stop 41 is in the initial position, the end surface of the stop presses against the pawl assembly 5 to separate the pawl assembly 5 from the teeth 22 on the sheave body 21 to prevent engagement therebetween. When the sheave body 21 rotates at a normal rotation speed, the pituitary 31 is located at an initial position. When the sheave body 21 rotates at a faster and faster speed, the pituitary 31 performs a centrifugal motion along the waist hole under an increasing centrifugal force. When the movement radius of the pituitary 31 reaches the distance between the screw 42 and the center of the rope pulley body 21, the striking rod 32 collides with the screw 42, and then the trigger stop 41 pivots, and further the acting force applied to the pawl assembly 5 is released, so that the pawl assembly 5 can be engaged with the rope pulley body 21.

In summary, in the mechanical trigger device of the present invention, the pituitary moves linearly during the speed-limiting operation; when the pituitary triggers the mechanical screw, the striking rod on the pituitary and the screw on the stop block do not have an included angle.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A mechanical trigger device, characterized in that the mechanical trigger device comprises: the rope wheel component, the pituitary component, the stop block component and the pawl component;

2. The mechanical trigger device of claim 1, wherein any one of the teeth forms an engagement point, and a plurality of the teeth are equally spaced circumferentially along the sheave body, and the circular arcs between adjacent teeth have center angles of at most 20 °.

3. The mechanical trigger device of claim 1, wherein the sheave body is provided with a first waist hole extending radially, and the lobe body is slidably disposed along the first waist hole via a bearing thereon and performs a centrifugal motion in response to the pivoting of the sheave body.

4. The mechanical trigger apparatus of claim 1, wherein the two lobe members are symmetrically disposed about the center of the sheave body.

5. The mechanical trigger device of claim 1, wherein the screw is vertically threaded into a threaded hole in the end face, and the end face at the other end of the stop is an arcuate recessed surface adapted to the pawl assembly.

6. The mechanical trigger apparatus of claim 1, wherein the stop is pivotally disengaged from the pawl assembly when the screw is activated by the lobe.

7. The mechanical trigger device of claim 1, further comprising a bracket comprising: the rope wheel assembly, the pituitary assembly, the stop block assembly and the pawl assembly are integrated on the bracket.