CN211366640U

CN211366640U - Tensioning device of elevator and speed limiter

Info

Publication number: CN211366640U
Application number: CN201922131595.5U
Authority: CN
Inventors: 张灵; 邹玮; 张耀文
Original assignee: Guangzhou Guangri Elevator Industry Co Ltd
Current assignee: Guangzhou Guangri Elevator Industry Co Ltd
Priority date: 2019-11-29
Filing date: 2019-11-29
Publication date: 2020-08-28
Anticipated expiration: 2029-11-29

Abstract

The utility model discloses a tensioning device of a speed limiter, which comprises a fixed frame, a swing arm rotationally connected with the fixed frame and used for installing a tensioning wheel, and a balancing weight acting on the swing arm; the swing arm is provided with a switch trigger part which is positioned right above the swing arm and the rotating shaft of the fixed frame; the overspeed governor tensioning apparatus still includes: the switch bracket is fixedly arranged on the guide rail; and the detection switch is arranged on the switch bracket, is positioned right above the switch trigger part and is used for generating a disconnection signal when the switch trigger part is not detected so as to disconnect a safety circuit. The utility model also provides an elevator that has the overspeed device tensioner of this overspeed governor. The utility model discloses can accurately detect the not enough condition of overspeed governor wire rope tensile force.

Description

Tensioning device of elevator and speed limiter

Technical Field

The utility model relates to an elevator equipment field, in particular to overspeed device tensioner of elevator and overspeed governor.

Background

The overspeed governor is a safety component for detecting the overspeed of an elevator, and when the elevator runs at the overspeed, the overspeed governor acts and provides enough lifting force to trigger a safety gear. The tensioning device of the speed limiter is placed in a well pit and used for applying certain tension to the speed limiter steel wire rope so as to ensure that enough friction force exists between the speed limiter steel wire rope and the speed limiter wheel and enable the rotating linear speed of the speed limiter wheel to be consistent with the up-and-down running speed of the speed limiter steel wire rope.

Currently, a tensioning device is mounted on an elevator guide rail, which comprises: the elevator safety device comprises a fixed frame fixed on an elevator guide rail, a detection switch connected with the fixed frame, a swing arm hinged with the fixed frame, and a speed governor tensioning wheel and a balancing weight arranged on the swing arm; the swing arm can rotate around the articulated shaft, utilizes the balancing weight of keeping away from the swing arm articulated shaft to produce required tensile force, and detects overspeed governor wire rope's lax through detecting switch. Adopt the overspeed device tensioner of above-mentioned structure, could trigger the detection switch in order to break off safety circuit only when the balancing weight is rotatory down to certain angle, and when the angle of balancing weight rotation down was too big, then probably hit the detection switch because of the angle is too big, and when the balancing weight upwards rotates certain angle or the unexpected whole of swing arm drops, all can't trigger the detection switch, can not guarantee sufficient tensile force, thereby can't guarantee to have sufficient pulling force to trigger safety tongs, there is the risk of elevator brake inefficacy.

Disclosure of Invention

The utility model aims at providing a overspeed device tensioner of overspeed device governor, the overspeed device tensioner of this overspeed device governor can accurately detect the not enough condition of overspeed device governor wire rope tensile force.

In order to realize the purpose, the technical scheme of the utility model is that:

a overspeed governor tensioning apparatus, comprising: the device comprises a fixed frame, a swing arm which is rotationally connected to the fixed frame and used for mounting a tension wheel, and a balancing weight which acts on the swing arm;

the swing arm is provided with a switch trigger part which is positioned right above the swing arm and the rotating shaft of the fixed frame;

the overspeed governor tensioning apparatus still includes:

the switch bracket is fixedly arranged on the guide rail;

and the detection switch is arranged on the switch bracket, is positioned right above the switch trigger part and is used for generating a disconnection signal when the switch trigger part is not detected so as to disconnect a safety circuit.

By adopting the tensioning device of the speed limiter with the structure, the switch support and the swing arm are separately arranged, the switch trigger part on the swing arm is detected through the detection switch on the switch support, when the swing arm rotates upwards or downwards or the swing arm drops integrally, the detection switch generates a disconnection signal because the switch trigger part cannot be detected so as to disconnect a safety loop, so that enough pulling force is ensured to trigger the safety tongs, the risk of brake failure of the elevator is avoided, and the safe and effective operation of the elevator is facilitated.

As a specific embodiment, the detection switch is a contact type detection switch;

the switch trigger part is a switch pressing plate, and the switch pressing plate is in contact with the contact type detection switch when the tension of the steel wire rope is normal.

Further, the contact detection switch is a micro switch.

Further, the switch press plate includes:

a first contact portion that comes into contact with the contact detection switch when the tension of the wire rope is normal;

the first arc part is connected with one end, close to the balancing weight, of the first contact part;

and the second arc part is connected with one end, far away from the balancing weight, of the first contact part.

Further, when the swing arm rotates downwards for a certain angle, the contact detection switch moves along the first contact part to the direction of the second arc part and leaves the switch pressing plate;

when the swing arm rotates upwards for a certain angle, the contact type detection switch moves towards the first arc part along the first contact part and leaves the switch pressing plate.

As a specific embodiment, the detection switch is a non-contact detection switch.

Furthermore, the switch bracket is provided with an installation groove which is vertical to the length direction of the guide rail;

still be equipped with two in the mounting groove and be used for with the switch support is fixed the fixed sign indicating number of pressing on the guide rail, two fixed sign indicating numbers of pressing are followed the fluting direction motion of mounting groove, so that detection switch is located directly over the switch trigger part.

The utility model also provides an elevator, it includes the aforesaid overspeed device tensioner of overspeed device governor.

For a better understanding and an implementation, the present invention is described in detail below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic view of a prior art overspeed governor tensioner;

fig. 2 is a schematic view of the swing arm rotating downward in the tensioner of a prior art governor;

fig. 3 is a schematic view of the upward rotation of the swing arm in the tensioner of a prior art governor;

fig. 4 is a schematic view of a tensioner of the governor of the present invention;

fig. 5 is an elevation view of the overspeed governor tensioning apparatus of the present invention;

fig. 6 is a schematic view of the swing arm of the overspeed governor tensioner of the present invention rotated downward by a certain angle;

fig. 7 is a partial schematic view of the swing arm of the overspeed governor tensioner of the present invention rotated downward by a certain angle;

fig. 8 is a schematic diagram of the swing arm of the overspeed governor tensioner of the present invention rotating upward by a certain angle.

[ reference numerals ]

1 fixing frame 2 swing arm 3 balancing weight

4 switch pressing plate 5 switch support 6 detection switch

7 fixed pressing code of guide rail 8 and rotating shaft 9

10 tensioning wheel 11 wire rope 12 first contact part

13 first arc portion 14 second arc portion

Detailed Description

In order to fully understand the objects, features and effects of the present invention, the conception, specific structure and technical effects of the present invention will be further described with reference to the accompanying drawings.

As shown in fig. 4 to 8, a tension device of a speed governor includes: the device comprises a fixed frame 1, a swing arm 2 which is rotatably connected to the fixed frame 1 and used for mounting a tension wheel 10, and a balancing weight 3 acting on the swing arm 2;

the swing arm 2 is provided with a switch triggering part which is positioned right above the swing arm 2 and the rotating shaft 8 of the fixed frame;

the overspeed governor tensioning apparatus still includes:

a switch bracket 5 fixedly arranged on the guide rail 7;

and the detection switch 6 is arranged on the switch bracket, is positioned right above the switch trigger part and is used for generating an off signal to break a safety circuit when the switch trigger part is not detected.

The rotating shaft, the switch triggering part and the detection switch are positioned on the same straight line, so that the situation that the detection switch is damaged due to an overlarge rotating angle can be effectively prevented.

the switch trigger part is a switch pressing plate 4, and the switch pressing plate 4 is contacted with the contact type detection switch when the tension of the steel wire rope 11 is normal.

Specifically, when the tension of the steel wire rope 11 is normal (that is, when the swing arm is in a balanced state, as shown in fig. 4 and 5), the contact detection switch is located right above the switch pressing plate and contacts with the switch pressing plate. When the tension of the steel wire rope is abnormal (namely the swing arm rotates upwards or downwards or falls), the contact detection switch is separated from the switch pressing plate, the contact detection switch generates a disconnection signal, and a safety loop is disconnected, so that enough lifting force is ensured to trigger safety tongs, and the risk of brake failure of the elevator is avoided. Compared with the prior art, the utility model, it generates the turn-off signal according to whether can detect the clamp plate through detection switch, and swing arm touching detection switch among the non-prior art breaks off the safety circuit, avoided as shown in fig. 3, the swing arm upwards rotates and can't trigger the condition emergence that detects switch disconnection safety circuit, also avoided as shown in fig. 2, the swing arm downward rotation angle is too big and damage the condition emergence that detects the switch, also avoided the swing arm whole to drop and can't trigger the condition emergence that detects switch disconnection safety circuit.

Preferably, the contact detection switch is a micro switch.

As shown in fig. 7, further, the switch press plate includes:

a first contact portion 12 that comes into contact with the contact detection switch when the tension of the wire rope is normal;

a first arc portion 13 connected to one end of the first contact portion 12 close to the weight member 3;

and a second arc portion 14 connected to an end of the first contact portion 12 away from the weight member 3. Through first circular arc portion with second circular arc portion with the both ends of first contact site are connected, make when the swing arm upwards rotates or rotates downwards, contact detection switch all can with the separation smoothly is realized to the switch clamp plate, prevents to damage detection switch because of turned angle is too big.

As shown in fig. 6 to 8, when the swing arm 2 rotates downward by a certain angle α, the contact detection switch moves in the direction of the first contact portion 12 toward the second arc portion 14 and moves away from the switch pressing plate 4; when the swing arm 2 rotates upward by a certain angle α, the contact detection switch moves along the first contact portion 12 toward the first arc portion 13 and leaves the switch pressing plate 4.

Further, the non-contact detection switch is a proximity switch. Preferably, the proximity switch is a photoelectric switch or a magnetic induction switch, and the switch trigger portion is a reflection component used in cooperation with the photoelectric switch or a magnetic component used in cooperation with the magnetic induction switch.

When the swing arm rotates upwards or downwards or falls integrally, the photoelectric switch can generate a disconnection signal because the switch trigger part cannot be detected so as to disconnect a safety circuit.

still be equipped with two in the mounting groove and be used for with the switch support is fixed press sign indicating number 9 on the guide rail, two fixed press sign indicating numbers 9 are followed the fluting direction motion of mounting groove, so that detection switch is located directly over the switch trigger part.

In the description of the present invention, it should be understood that the terms "vertical", "horizontal", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.

If the terms "first," "second," etc. are used herein to define parts, those skilled in the art will recognize that: the use of "first" and "second" is merely for convenience in describing the invention and to simplify the description, and the words are not intended to have a special meaning unless otherwise stated.

The present invention is not limited to the above embodiment, and if various modifications or variations of the present invention do not depart from the spirit and scope of the present invention, they are intended to be covered if they fall within the scope of the claims and the equivalent technology of the present invention.

Claims

1. A overspeed governor tensioning apparatus, comprising: mount, rotation are connected be used for installing the swing arm of take-up pulley on the mount and be used in balancing weight in the swing arm, its characterized in that:

the overspeed governor tensioning apparatus still includes:

the switch bracket is fixedly arranged on the guide rail;

2. The overspeed governor tensioning arrangement of claim 1, wherein:

the detection switch is a contact type detection switch;

3. The overspeed governor tensioning arrangement of claim 2, wherein:

the contact detection switch is a microswitch.

4. The governor tensioning device of claim 2, wherein the switch blade comprises: a first contact portion that comes into contact with the contact detection switch when the tension of the wire rope is normal;

5. The overspeed governor tensioning arrangement of claim 4, wherein:

when the swing arm rotates downwards for a certain angle, the contact type detection switch moves towards the second arc part along the first contact part and leaves the switch pressing plate;

6. The overspeed governor tensioning arrangement of claim 1, wherein:

the detection switch is a non-contact detection switch.

7. The overspeed governor tensioning arrangement of claim 1, wherein:

the switch bracket is provided with an installation groove which is vertical to the length direction of the guide rail;

8. An elevator characterized by comprising a tensioning device of a speed limiter according to any of claims 1-7.