WO2019184415A1

WO2019184415A1 - Elevator speed limiter

Info

Publication number: WO2019184415A1
Application number: PCT/CN2018/118129
Authority: WO
Inventors: 王国成; 潘连宏; 朱雷龙
Original assignee: 苏州尼隆电梯部件有限公司
Priority date: 2018-03-28
Filing date: 2018-11-29
Publication date: 2019-10-03
Also published as: CN108275534A

Abstract

Disclosed is an elevator speed limiter. A rope wheel (2) is rotatably fixed inside a box body (1), the rope wheel (2) is fixed inside the box body (1) by a rotation centre shaft (21), a ratchet wheel (3) is fixed on the rotation centre shaft (21), the ratchet wheel (3) rotates coaxially with the rope wheel (2), a pawl shaft (4) is provided inside the box body (1) above the ratchet wheel (3), an oscillating rod (5) is rotatably fixed on the pawl shaft (4), a rotation wheel (51) is provided on an end of the oscillating rod (5), a pawl (52) is provided in the middle of the oscillating rod (5), the ratchet wheel (3) comprises a cam (31) and multiple ratchets (32) provided on a back face of the cam (31), and the surface of the rotation wheel (51) is in contact with the surface of the cam (31). When the elevator stalls, the oscillation amplitude of the rotation wheel (51) increases under the action of the cam (31), then the pawl (52) is driven to increase the oscillation amplitude and come into contact with the ratchets (32) on the back face of the cam (31), and the pawl (52) is clamped with the ratchets (32). The elevator speed limiter can be applied to an elevator without a machine room and can improve the reliability of elevator braking.

Description

Elevator speed limiter

Technical field

The invention relates to the technical field of elevator safety components, in particular to an elevator speed limiter.

Background technique

Elevators are widely used in people's daily life, but because elevator maintenance is not timely or other failure reasons, it often causes some troubles in the elevator, and even leads to accidents, while elevators, speeding down, etc. are more common elevators. The cause of the accident, there have been some detection devices to prevent accidental movement of the elevator car. When the elevator car stops in the hoistway, if there is a stop and stop, the detection device sends a brake electric signal to the elevator brake device. The moving device brakes the elevator car upon receiving the above braking signal, wherein the elevator speed limiter is the main safety control component.

Household ladders are more widely promoted and used, especially in elevator renovation of old houses. Due to space constraints, existing elevator speed limiters are difficult to be applied to household ladders because they are more suitable for organic room elevators. Therefore, it is necessary to design a new elevator speed limiter to be able to adapt to the characteristics of the machine room-less elevator and improve the work safety of the elevator.

Summary of the invention

The object of the present invention is to provide an elevator speed limiter which can be applied to a machine room-less elevator and at the same time can improve the reliability of the elevator brake.

In order to achieve the above object, the technical solution adopted by the present invention is:

The invention provides an elevator speed limiter, comprising a box body for fixing a sheave, wherein the rope body is rotatably fixed with a rope wheel, and the rope wheel is fixed in the box body by a rotating middle shaft, A ratchet is fixed on the intermediate shaft, the ratchet rotates coaxially with the sheave, and a pawl shaft is disposed above the ratchet in the casing, and a swing is fixedly fixed on the pawl shaft. a rod having a rotating wheel fixed at one end thereof, a middle portion of the swinging rod is provided with a pawl, wherein the ratchet includes a cam and a plurality of ratchet teeth disposed on a back surface of the cam, the rotating wheel and the cam Surface contact;

When the elevator stalls, the swinging amplitude of the rotating wheel in the cam is increased, thereby driving the pawl to increase the swinging amplitude and contacting the ratchet teeth on the back surface of the cam, and the pawl is engaged with the ratchet.

For the above technical solutions, the inventors have further optimization measures.

Further, a top of the box is provided with a contact switch, and the swinging rod is connected to a vertically disposed striking rod, and the other end of the striking rod passes out of the top of the box and is close to the contact of the contact switch. According to the point setting, the swinging amplitude of the swinging rod is increased when the elevator stalls, thereby driving the touch rod to swing greatly and touching the contact of the contact switch, and the contact switch is powered off to stop the elevator after the touch rod touches the electric shock.

Further, an electromagnet is fixed on the top of the box, the electromagnet is disposed near the contact switch, and the electromagnet is energized when the elevator performs the safety clamp linkage test, so that the electromagnet attracts the touch rod to make the pawl card The ratchet at the ratchet causes the speed limiter to move, and finally the safety gear is actuated.

Further, the box body comprises two side panels arranged in parallel, and the upper part of the two side panels is fixedly connected by a cover plate, and the lower part of the two side panels is fixedly connected by a bottom plate, and the contact switch is fixed at the The upper part of the cover,

Further, a speed regulating spring is disposed in the box body, and one end of the speed regulating spring is fixed at the box body, and the other end is fixedly connected to the swinging rod for limiting the swinging rod.

Due to the above technical solutions, the present invention has the following advantages over the prior art:

The elevator speed limiter of the present invention is provided with a ratchet rotating coaxially with the sheave, wherein the ratchet has a cam associated with the rotating wheel at the swinging rod, and the cam can drive the rotating wheel to rotate, thereby causing the swinging rod to swing left and right, normal When the rotation, the pawl on the swinging rod does not touch the ratchet at the ratchet. When the elevator overspeeds, the rotation speed of the cam is increased, and the rotation of the rotating wheel is driven to increase the swinging amplitude of the swinging rod, and then the pawl tooth card is increased. The ratchet in the ratchet causes the speed limiter to stop rotating, and the speed limiter wire rope pulls the safety clamp to stop the elevator, so that the speed limit stop of the home machine roomless elevator can be realized, and the elevator speed limiter has a simple and convenient structure. And work safely and with high reliability.

Further, the present invention further provides a striking rod connected to the swinging rod. Through the structural design of the striking rod and the contact switch, the striking rod does not contact the switch under normal conditions. When the elevator overspeeds, the swinging rod swing increases and drives The additional swing of the striking rod enables the striking rod to touch the switch to make the switch act, and stop the work of the elevator, thereby further improving the working safety of the elevator.

DRAWINGS

Some specific embodiments of the present invention are described in detail below by way of example, and not limitation. The same reference numbers in the drawings identify the same or similar parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the figure:

1 is a front view showing the structure of an elevator speed limiter according to an embodiment of the present invention;

Figure 2 is a schematic left side view of the elevator speed limiter shown in Figure 1;

3 is a schematic right side view of the elevator speed limiter shown in FIG. 1.

Among them, the reference numerals are as follows:

1, box, 11, side panels, 12, cover, 13, bottom plate;

2, the sheave, 21, the rotating shaft;

3, ratchet, 31, cam, 32, ratchet;

4, the pawl shaft;

5, swinging rod, 51, runner, 52, pawl, 53, speed governing spring;

6, touch rod; 7, contact switch; 8, electromagnet.

detailed description

The technical solutions of the present invention will be clearly and completely described in the following with reference to the accompanying drawings. It is obvious that the described embodiments are a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In the description of the present invention, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. The orientation or positional relationship of the indications is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the invention and the simplified description, rather than indicating or implying that the device or component referred to has a specific orientation, in a specific orientation. The construction and operation are therefore not to be construed as limiting the invention. Moreover, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Further, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not constitute a conflict with each other.

The invention describes an elevator speed limiter, comprising a box 1 for fixing a sheave 2, as shown in Fig. 2 and Fig. 3, the box body 1 comprises two side plates 11 arranged in parallel, on two side plates The upper portion of the upper portion 11 is fixedly connected by the cover plate 12, and the lower portion of the two side plates 11 is fixedly connected by the bottom plate 13, and the sheave 2 is rotatably fixed in the casing 1, and the rotating central shaft 21 is fixed at the bottom. Between the two side plates 11 and substantially in the middle of the side plate 11, the sheave 2 is fixed in the casing 1 by a rotating middle shaft 21, and a ratchet 3 is fixed on the intermediate shaft, the ratchet 3 Rotating coaxially with the sheave 2, a pawl shaft 4 is fixed between the two side plates 11 in the casing 1, and the pawl shaft 4 is located above the ratchet 3 A swing lever 5 is rotatably fixed to the pawl shaft 4, and a swing wheel 51 is fixed to one end of the swing lever 5, and a pawl 52 is disposed at a middle portion of the swing lever 5, wherein the ratchet 3 includes a cam 31. And a plurality of ratchet teeth 32 disposed on the back of the cam 31, the runner 51 being in contact with the surface of the cam 31.

It can be understood that, in the case of normal operation of the elevator, the runner 51 follows the rotation of the cam 31, and drives the swing lever 5 connected to the runner 51 to swing left and right, and the pawl 52 does not cooperate with the normal swing. The ratchet 3 ratchet 32 is touched, and when the elevator stalls, the rotation of the sheave 2 is instantaneously accelerated, and the cam 31 of the ratchet 3 rotating coaxially with the sheave 2 is accelerated, and the rotary wheel 51 is at the cam The action swing amplitude is increased, which in turn drives the pawl 52 to increase in swing amplitude and contacts the ratchet teeth 32 on the back side of the cam 31, and the pawl 52 is engaged with the ratchet teeth 32.

That is, the elevator speed limiter of the present embodiment is provided with a ratchet wheel 3 that rotates coaxially with the sheave 2, and the ratchet wheel 3 has a cam 31 that is interlocked with the turning wheel 51 at the swinging lever 5, and the cam 31 can drive The runner 51 rotates, so that the swing lever 5 swings left and right. When normally rotating, the pawl 52 on the swing lever 5 does not touch the ratchet 32 at the ratchet wheel 3. When the elevator overspeeds, the rotation speed of the cam 31 is increased, and the lift is released. The rotation of the runner 51 causes the swinging amplitude of the swinging lever 5 to increase, and then the teeth of the pawl 52 are caught in the ratchet teeth 32 of the ratchet wheel 3 so that the speed limiter stops rotating, and the speed limiter wire rope pulls the safety gear to stop the elevator. In this way, the speed limit stop of the home machine roomless elevator can be realized, and the elevator speed limiter has a simple and convenient structure, and is safe in work and high in reliability.

Further, as shown in FIG. 1, the top of the cover plate 12 of the casing 1 is provided with a contact switch 7, and the swinging lever 5 is connected to a vertically disposed striking rod 6, and the other end of the striking rod 6 is worn. Opening the top of the box 1 and approaching the contact of the contact switch 7, the swinging amplitude of the swinging rod 5 is increased when the elevator stalls, thereby driving the striking rod 6 to swing greatly and touching the contact of the contact switch 7. After the touch rod 6 touches the electric shock, the contact switch 7 is powered off to stop the elevator.

In this embodiment, by setting the striking rod 6 connected to the swinging rod 5, the structural design of the striking rod 6 combined with the contact switch 7 realizes the auxiliary stopping of the elevator. Under normal circumstances, the touch rod 6 will not touch the switch 7, and when the elevator overspeeds, the swing rod 5 swings to increase, and the swing rod 6 is swung to increase the swing, so that the touch rod 6 can touch the switch to make the switch act, and stop the elevator. Work to further improve the safety of the elevator work.

An electromagnet 8 for performing linkage test is further fixed on the top of the cover plate 12, and the electromagnet 8 is disposed adjacent to the contact switch 7. When the elevator performs a safety clamp linkage test, the electromagnet 8 is energized to trigger the electromagnet. 8 The suction bar 6 causes the pawl 52 to snap into the ratchet 32 at the ratchet wheel 3 to actuate the speed limiter, and finally the safety gear is actuated. The electromagnet 8 is tested to facilitate the safety clamp linkage test after the elevator is installed, and the test can be completed more quickly and conveniently, and the safety verification can be realized, and the detection cost can be saved.

In addition, in order to restrain the resetting and limiting of the swinging lever 5 in the swinging state, a speed regulating spring 53 is disposed in the casing 1, and one end of the speed regulating spring 53 is fixed at the casing 1 and the other end is fixedly connected. The swinging lever 5 is used for limiting the swinging lever 5 so that the swinging lever 5 is not forced to be ejected or lost, thereby ensuring the normal operation of the swinging lever 5.

The above embodiments are only intended to illustrate the technical idea and the features of the present invention, and the purpose of the present invention is to enable those skilled in the art to understand the contents of the present invention and to implement the present invention. Equivalent changes or modifications made to the spirit of the spirit should be covered by the scope of the present invention.

Claims

An elevator speed limiter includes a case for fixing a sheave, wherein the case is rotatably fixed with a sheave, and the sheave is fixed in the case by a rotating middle shaft, wherein A ratchet is fixed on the intermediate shaft, the ratchet rotates coaxially with the sheave, and a pawl shaft is disposed above the ratchet in the casing, and a swing is fixedly fixed on the pawl shaft. a rod having a rotating wheel fixed at one end thereof, a middle portion of the swinging rod is provided with a pawl, wherein the ratchet includes a cam and a plurality of ratchet teeth disposed on a back surface of the cam, the rotating wheel and the cam Surface contact;

When the elevator stalls, the swinging amplitude of the rotating wheel in the cam is increased, thereby driving the pawl to increase the swinging amplitude and contacting the ratchet teeth on the back surface of the cam, and the pawl is engaged with the ratchet.
The elevator speed limiter according to claim 1, wherein a top of the box is provided with a contact switch, the swinging rod is connected to a vertically disposed striking rod, and the other end of the striking rod is worn out. The top of the box is disposed close to the contact of the contact switch, and the swinging amplitude of the swinging rod is increased when the elevator stalls, thereby driving the hitting rod to swing greatly and touching the contact of the contact switch, at the touch rod touch point After the electric shock, the contact switch is powered off to stop the elevator.
The elevator speed limiter according to claim 2, wherein an electromagnet is fixed on the top of the box, the electromagnet is arranged close to the contact switch, and the electromagnet is energized when the elevator performs the safety clamp linkage test. The ratchet is moved by the electromagnet to attract the ratchet to the ratchet, and the speed limiter is actuated, and finally the safety gear is operated.
The elevator speed limiter according to claim 2, wherein the box body comprises two side plates arranged in parallel, and the upper part of the two side plates is fixedly connected by a cover plate, and the two side plates are fixedly connected The lower portion is fixedly connected by a bottom plate, and the contact switch is fixed to an upper portion of the cover plate.
The elevator speed limiter according to any one of claims 1 to 4, wherein a speed regulating spring is disposed in the box body, and one end of the speed regulating spring is fixed at the box body, and the other end is fixedly connected The swinging lever is used for limiting the swinging lever.