CN215479032U

CN215479032U - Speed measuring mechanism and speed limiter for speed limiter

Info

Publication number: CN215479032U
Application number: CN202120835133.6U
Authority: CN
Inventors: 邹家春; 姚荣康; 刘坤; 马新峰; 车运通; 丁明星
Original assignee: Hangzhou Huning Elevator Parts Co Ltd
Current assignee: Hangzhou Huning Elevator Parts Co Ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2022-01-11
Anticipated expiration: 2031-04-22

Abstract

The utility model belongs to the technical field of elevator accessories, and particularly relates to a speed measuring mechanism for a speed limiter and the speed limiter. The speed measuring mechanism for the speed limiter comprises a magnetic cylinder and a magnetic encoder, wherein the magnetic cylinder is mounted on a rope wheel of the speed limiter through a mounting frame, and the magnetic cylinder and the rope wheel are coaxial and rotate synchronously; the magnetic encoder is arranged on a rope pulley shaft of the speed limiter so as to be in clearance fit with the magnetic cylinder; the rope wheel is rotationally matched with the rope wheel shaft. The speed measuring mechanism and the speed limiter for the speed limiter can acquire information such as lower trigger speed and displacement of the speed limiter with the rated speed lower than 0.5m/s by using the detection of the magnetic encoder and the magnetic cylinder, so that the intelligent control of the speed limiter is realized.

Description

Speed measuring mechanism and speed limiter for speed limiter

Technical Field

The utility model belongs to the technical field of elevator accessories, and particularly relates to a speed measuring mechanism for a speed limiter and the speed limiter.

Background

The speed limiter is an important guarantee for the safe operation of the elevator. When the elevator runs at an overspeed, the speed limiter triggers the electrical switch and generates mechanical action to drive the safety tongs to brake the car forcibly. Many types of conventional governors are known, and for example, the governor disclosed in patent document CN211733507U cannot achieve detection and control of a low trigger speed and a movement displacement at a rated speed of less than 0.5 m/s.

SUMMERY OF THE UTILITY MODEL

Based on the above-mentioned shortcomings and drawbacks of the prior art, it is an object of the present invention to at least solve one or more of the above-mentioned problems of the prior art, in other words, to provide a speed measuring mechanism and speed limiter for speed limiter that meets one or more of the above-mentioned needs.

In order to achieve the purpose of the utility model, the utility model adopts the following technical scheme:

a speed measuring mechanism for a speed limiter comprises a magnetic cylinder and a magnetic encoder, wherein the magnetic cylinder is installed on a rope wheel of the speed limiter through a mounting frame, and the magnetic cylinder and the rope wheel are coaxial and rotate synchronously; the magnetic encoder is arranged on a rope pulley shaft of the speed limiter so as to be in clearance fit with the magnetic cylinder; the rope wheel is rotationally matched with the rope wheel shaft.

Preferably, the axial direction of the rope wheel shaft is a hollow structure, and two ends of the rope wheel shaft are opened; the hollow structure is communicated with the outside through openings at two ends of the rope wheel shaft.

Preferably, the magnetic encoder is mounted on the rope wheel shaft adjacent to the end opening of the rope sheave.

Preferably, the lead wire of the magnetic encoder is arranged along the hollow structure of the rope wheel shaft and led out from the end opening, far away from the rope wheel, on the rope wheel shaft.

The utility model also provides a speed limiter, which comprises a base frame, a rope pulley and a rope pulley shaft, wherein the rope pulley is arranged on the base frame through the rope pulley shaft and is rotationally matched with the rope pulley shaft; the speed limiter further comprises a speed measuring mechanism for the speed limiter according to any one scheme.

As a preferred scheme, the speed limiter further comprises a centrifugal mechanism, the centrifugal mechanism comprises two centrifugal throwing blocks and a connecting rod, the two centrifugal throwing blocks are rotatably arranged on the rope wheel, the two centrifugal throwing blocks are positioned on the same side of the rope wheel and are respectively positioned on two sides of the axial direction of the rope wheel shaft, and the two centrifugal throwing blocks are respectively connected with two rotating pairs at two ends of the connecting rod; the base frame is provided with a plurality of braking steps arranged along the moving path of the centrifugal throw block, and the braking steps are used for being in braking fit with the centrifugal throw block when the speed limiter is over-speed.

Preferably, the sheave is integrally formed.

As a preferred scheme, one centrifugal throwing block is correspondingly provided with a speed regulating assembly for regulating the speed limit of the speed limiter.

As a preferred scheme, the speed regulation assembly comprises a speed regulation spring, a regulation rod and a limit seat, wherein one end of the speed regulation spring is connected to the position, far away from the rotation center, of the centrifugal throwing block, the other end of the speed regulation spring is connected to one end of the regulation rod, and the regulation rod is in telescopic fit with the limit seat to regulate the elongation of the speed regulation spring so as to control the throwing of the centrifugal throwing block; when the adjusting rod moves to the target position, the adjusting rod is fixed on the limiting seat.

Preferably, the speed limiter further comprises a reset switch for resetting the speed limiter.

Compared with the prior art, the utility model has the beneficial effects that:

according to the speed measuring mechanism and the speed limiter for the speed limiter, parameters such as lower trigger speed and displacement of the speed limiter with the rated speed lower than 0.5m/s can be obtained by matching the magnetic encoder with the magnetic cylinder, so that the intelligent control of the speed limiter is realized, and the detection problems of low speed, displacement and the like are solved; in addition, the lead of the magnetic encoder is led out from the hollow structure of the rope pulley shaft, and the structure layout is reasonable and compact.

Drawings

Fig. 1 is a schematic structural view of a speed governor according to embodiment 1 of the present invention;

fig. 2 is a schematic structural view of a base frame of a speed governor in embodiment 1 of the present invention;

fig. 3 is a schematic structural view of a sheave shaft of a speed governor according to embodiment 1 of the present invention;

fig. 4 is a schematic structural diagram of a governor according to another view angle in embodiment 1 of the present invention;

FIG. 5 is a cross-sectional view of section A-A in FIG. 4;

fig. 6 is a schematic structural view of a speed governor in embodiment 1 of the present invention (with sheaves omitted);

fig. 7 is a schematic structural view of a governor according to another perspective of embodiment 1 of the present invention.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention, the following description will explain the embodiments of the present invention with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the utility model, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

Example 1:

as shown in fig. 1 to 7, the speed measuring mechanism for a governor of the present embodiment is applied to a governor.

Specifically, the speed governor comprises a base frame 1, a rope pulley 2, a rope pulley shaft 3, a centrifugal mechanism, a speed regulation assembly and a speed measurement mechanism.

Wherein, rope sheave 2 passes through rope sheave axle 3 and installs on bed frame 1, and rope sheave 2 rotation cooperation is in rope sheave axle 3. Specifically, the base frame 1 of the present embodiment is an L-shaped structure, and includes a horizontal mounting portion 1-1 and a vertical mounting portion 1-2 vertically extending therefrom, the horizontal mounting portion 1-1 has a mounting fixing hole 1a of the governor and a through hole 1b through which the wire rope passes, and a positioning hole 1c is formed in the middle of the vertical mounting portion 1-2.

The rope wheel 2 of the embodiment is integrally formed, and is low in processing cost and high in efficiency. The outer ring of the rope wheel 2 is provided with a steel wire rope groove, and lifting force is generated through the steel wire rope groove and a steel wire rope so as to lift the safety tongs to perform safety braking. The sheave 2 may be configured by a sheave mechanism disclosed in patent document CN 211733507U.

As shown in fig. 3, the sheave shaft 3 of the present embodiment sequentially includes a positioning section 3-1, a first mounting section 3-2, an avoiding section 3-3, a second mounting section 3-4, a limiting groove section 3-5, and an extending section 3-6 along an axial direction thereof, an outer diameter of the positioning section 3-1 is smaller than an outer diameter of the first mounting section 3-2, an outer diameter of the first mounting section 3-2 is larger than an outer diameter of the avoiding section 3-3, an outer diameter of the avoiding section 3-3 is larger than an outer diameter of the second mounting section 3-4, an outer diameter of the second mounting section 3-4 is larger than an outer diameter of the limiting groove section 3-5, and an outer diameter of the limiting groove section 3-5 is smaller than an outer diameter of the extending section 3-6. The outer diameter of the positioning section 3-1 of the rope pulley shaft 3 is matched with the aperture of the positioning hole of the vertical mounting part of the base frame, so that the positioning section 3-1 of the rope pulley shaft is inserted into the positioning hole 1c of the base frame, the first mounting section 3-2 of the rope pulley shaft is provided with a plurality of fixing holes along the axial direction, and the fixing holes are distributed along the circumferential direction of the first mounting section 3-2 and are fixedly matched with the fixing holes through fixing pieces (such as bolts or screws and the like) to mount and fix the rope pulley shaft 3 and the base frame 1.

The rope wheel 2 is arranged on the second mounting section 3-4 of the rope wheel shaft through a bearing 4, the inner ring of the bearing 4 is limited through the avoidance section 3-3 of the rope wheel shaft and the elastic retainer ring 5 arranged on the limiting groove section 3-5 of the rope wheel shaft, and the axial limiting of the rope wheel 2 is realized.

The centrifugal mechanism of the embodiment is mounted on the rope pulley 2 and is positioned between the rope pulley 2 and the vertical mounting part of the base frame. Specifically, the centrifugal mechanism comprises two centrifugal throwers 6 and a connecting rod 7 which are distributed on the left side and the right side, and the two centrifugal throwers are rotatably mounted on the rope wheel, for example, the centrifugal throwers are mounted on the rope wheel through a screw rod to realize rotatable mounting; the two centrifugal throwing blocks are positioned on the same side of the rope wheel and are respectively positioned on two sides of the axial direction of the rope wheel shaft, and the two centrifugal throwing blocks are respectively connected with two end rotating pairs of the connecting rod 7 to realize the linkage of the two centrifugal throwing blocks.

In addition, the vertical installation part of the base frame 1 is provided with three braking steps 100 arranged along the moving path of the centrifugal throw block, and the braking steps are uniformly distributed along the moving path of the centrifugal throw block; the braking step 100 is used to cooperate with the centrifugal thrower braking when the governor is overspeed.

The centrifugal block on the left side of the present embodiment is correspondingly provided with a speed regulation assembly for regulating the speed limit of the speed limiter. Specifically, the speed regulation assembly is installed on the rope pulley and comprises a speed regulation spring 8, a regulation rod 9 and a limiting seat 10, the left end of the speed regulation spring 8 is connected to a position (namely the lowest side) far away from a rotation center on the centrifugal throwing block, the right end of the speed regulation spring is connected to the left end of the regulation rod, the regulation rod is in telescopic fit with the limiting seat to regulate the elongation of the speed regulation spring, and the throwing of the centrifugal throwing block is controlled, so that the speed limit of the speed limiter can be controlled; when the adjusting rod 9 moves to the target position, the adjusting rod 9 is fixed to the limiting seat 10, and the specific fixing manner is not described herein, for example, by a fixing pin. In addition, the existing structure only needs to be capable of adjusting the extension amount of the speed adjusting spring, and the adjusting mode is not limited to the adjusting mode.

As shown in fig. 5 and 6, the speed measuring mechanism of the present embodiment includes a mounting frame 11, a magnetic cylinder 12 and a magnetic encoder 13, wherein the magnetic cylinder 12 is mounted on the mounting frame 11; the mounting frame 11 is arranged on the rope wheel to synchronously rotate with the rope wheel 2; magnetic encoder 13 is installed in the tip of rope sheave axle 3 to with 12 clearance fit of magnetic cylinder, thereby realize when rope sheave 2 rotates, magnetic cylinder 12 realizes the cooperation with magnetic encoder 13, realizes the coding function, can acquire the action parameter of overspeed governor, for example: the rotational speed, the displacement and the like of the rope wheel can obtain a lower triggering speed with a rated speed lower than 0.5 m/s. The axial direction of the rope wheel shaft 3 is a hollow structure, two ends of the rope wheel shaft are opened, a lead of the magnetic encoder is distributed along the hollow structure of the rope wheel shaft and is led out from the end opening, far away from the rope wheel, of the rope wheel shaft, namely, a lead 14 electrically connected with the encoder is led out, and the structure layout is reasonable and compact.

The speed limiter of this embodiment further comprises a reset switch 15 mounted on the top of the base frame for resetting the speed limiter. The reset switch can refer to the prior art and is not described herein.

Example 2:

the speed measuring mechanism for the governor in this embodiment is different from that in embodiment 1 in that:

the rope wheel shaft can be not in a hollow structure and is directly externally connected with a lead; in addition, the centrifugal mechanism can also adopt a centrifugal mechanism commonly used in the prior art.

Other structures and structures of the governor may refer to embodiment 1.

Example 3:

the speed governor of the present embodiment is different from embodiment 1 in that:

the number of the braking steps is not limited to three in the embodiment, and can be four, five, six and the like, and the braking steps are designed according to the actual application requirements to meet the requirements of different application occasions.

Other structures can refer to embodiment 1.

The foregoing has outlined rather broadly the preferred embodiments and principles of the present invention and it will be appreciated that those skilled in the art may devise variations of the present invention that are within the spirit and scope of the appended claims.

Claims

1. A speed measuring mechanism for a speed limiter is characterized by comprising a magnetic cylinder and a magnetic encoder, wherein the magnetic cylinder is arranged on a rope wheel of the speed limiter through a mounting frame, and the magnetic cylinder and the rope wheel are coaxial and rotate synchronously; the magnetic encoder is arranged on a rope pulley shaft of the speed limiter so as to be in clearance fit with the magnetic cylinder; the rope wheel is rotationally matched with the rope wheel shaft.

2. The speed measuring mechanism for the speed limiter according to claim 1, wherein the axial direction of the rope pulley shaft is a hollow structure, and two ends of the rope pulley shaft are opened; the hollow structure is communicated with the outside through openings at two ends of the rope wheel shaft.

3. A speed measuring mechanism according to claim 1 wherein said magnetic encoder is mounted on the axle of the rope pulley adjacent to the end opening of the rope pulley.

4. A speed measuring mechanism according to claim 3 wherein the leads of said magnetic encoder are routed along the hollow structure of the sheave shaft and out of the end opening of the sheave shaft remote from the sheave.

5. A speed limiter comprises a base frame, a rope wheel and a rope wheel shaft, wherein the rope wheel is arranged on the base frame through the rope wheel shaft and is in rotating fit with the rope wheel shaft; the speed limiter is characterized by further comprising a speed measuring mechanism for the speed limiter according to any one of claims 1 to 4.

6. The speed governor of claim 5, further comprising a centrifugal mechanism, wherein the centrifugal mechanism comprises two centrifugal throwers and a connecting rod, the two centrifugal throwers are rotatably mounted on the sheave, the two centrifugal throwers are located on the same side of the sheave and located on two axial sides of the sheave shaft, respectively, and the two centrifugal throwers are connected with two end rotating pairs of the connecting rod, respectively; the base frame is provided with a plurality of braking steps arranged along the moving path of the centrifugal throw block, and the braking steps are used for being in braking fit with the centrifugal throw block when the speed limiter is over-speed.

7. The governor of claim 6, wherein the sheave is integrally formed.

8. The speed governor of claim 6, wherein a centrifugal throw block is associated with the governor assembly for adjusting the speed limit of the governor.

9. The speed governor of claim 8, wherein the governor assembly comprises a governor spring, an adjustment lever, and a limit seat, wherein one end of the governor spring is connected to a position on the centrifugal thrower away from the center of rotation, the other end of the governor spring is connected to one end of the adjustment lever, and the adjustment lever is telescopically engaged with the limit seat to adjust the elongation of the governor spring to control the throwing of the centrifugal thrower; when the adjusting rod moves to the target position, the adjusting rod is fixed on the limiting seat.

10. A speed limiter in accordance with any one of claims 5 to 9 further including a reset switch for resetting the speed limiter.