CN217458352U - Speed governor and elevator - Google Patents

Abstract

The utility model belongs to the technical field of elevator part, concretely relates to overspeed governor and elevator, the overspeed governor, including shaft and the rope sheave of rotation installation in the shaft, still include the centrifugal mechanism who locates the rope sheave, the centrifugal mechanism includes two centrifugation flail blocks and connecting rod, and two centrifugation flail blocks rotatable are installed in the rope sheave, and are connected with the both ends revolute pair of connecting rod respectively; the throwing-out side of one centrifugal throwing block is rotatably connected with a braking piece, and correspondingly, a brake disc is coaxially arranged on the wheel shaft; when the speed limiter is in an overspeed state, the centrifugal swinging block is used for linking the braking piece to move to be attached to the brake disc so as to be in braking fit. The utility model discloses a speed limiter, under the effect of centrifugal force, the braking piece is thrown away the piece and is directly stimulateeed by the centrifugation, and the braking piece is through the auto-lock between brake disc and rope sheave to make rope sheave stall and realize carrying and drawing, examine time measuring at the hypervelocity, have the characteristics that trigger in the twinkling of an eye, quick response, thereby promoted the response time of safety arrangement braking.

Description

Speed limiter and elevator

technical field

The utility model belongs to the technical field of elevator components, in particular to a speed limiter and an elevator.

Background technique

According to the requirements of the new elevator standard, in order to ensure that the speed limiter operates before reaching the dangerous speed, the maximum distance corresponding to the movement of the speed limiter rope between the action points of the speed limiter that triggers the progressive safety gear should not be greater than 250mm. The maximum distance corresponding to the movement of the speed limiter rope between the action points of the speed limiter that triggers the instantaneous safety gear should not be greater than 100mm. When some existing speed limiters are triggered, the centrifugal block cooperates with the braking step, that is, several braking points are set after the centrifugal block is triggered, which has the characteristics of long capture time and slow response, and cannot achieve instant triggering; moreover, When the brake is triggered, the centrifugal block and the bracket carry a large impact force, and the overall structural strength is required to be high to ensure stability, and a limit should be designed on the centrifugal block to ensure the safety of the centrifugal mechanism. In addition, when three braking steps are set on the bracket as trigger points, the processing and manufacturing requirements are high;

In the prior art, when the trigger point is increased in order to improve the response, it cannot be triggered as the speed increases, and it is difficult to achieve high speed.

Utility model content

Based on the above-mentioned shortcomings and deficiencies in the prior art, one of the purposes of the present invention is to at least solve one or more of the above-mentioned problems existing in the prior art. One or more of a speed governor and an elevator.

In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical solutions:

A speed limiter includes an axle and a sheave rotatably mounted on the axle, and also includes a centrifugal mechanism arranged on the sheave, the centrifugal mechanism includes two centrifugal throwing blocks and a connecting rod, and the two centrifugal throwing blocks can be rotatably mounted on the sheave , and are respectively connected with the rotating pairs at both ends of the connecting rod; the throwing side of a centrifugal throwing block is rotatably connected with a braking member, and correspondingly, the axle is coaxially provided with a braking disc;

When the speed limiter is in an overspeed state, the centrifugal throwing block links the brake to move to fit the brake disc for braking cooperation.

As a preferred solution, the sheave is provided with a guide member, and the guide member is used to guide and lock the movement of the brake member.

As a preferred solution, the guide member is a guide column or a guide block, and the brake member has a limit hole; the guide member is movably fitted in the limit hole to limit the reset stroke of the centrifugal throwing block.

As a preferred solution, the braking surface of the braking member is an inclined surface or an arc surface.

As a preferred solution, the braking surface of the braking member has a knurling pattern.

As a preferred solution, the outer peripheral surface of the brake disc is a braking surface, which is used for braking cooperation with the braking surface of the braking member; the braking surface of the braking disc has a knurling pattern.

As a preferred solution, the sheave comprises an outer ring of the sheave and an inner ring of the sheave installed coaxially, and a friction plate is provided between the outer ring of the sheave and the inner ring of the sheave.

As a preferred solution, the inner ring of the sheave includes a main rim and a friction adjusting ring that is coaxially fixed on the main rim. The outer edge of the main rim and the outer edge of the friction adjusting ring form an installation groove, and the outer The inner ring of the ring is embedded in the installation groove, and the two sides of the inner ring of the outer ring of the sheave are respectively frictionally matched with the main wheel ring and the friction force adjusting ring through friction plates.

As a preferred solution, one of the centrifugal throwing blocks is correspondingly provided with a speed regulating assembly, which is used to adjust the speed limit of the speed limiter and reset the speed limiter.

The utility model also provides an elevator, which is characterized in that the speed limiter described in any one of the above solutions is adopted.

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

In the speed limiter of the utility model, under the action of centrifugal force, the braking element is directly pulled by the centrifugal throwing block, and the braking element is self-locked between the braking disc and the sheave, so that the sheave stops rotating to realize the pulling , In the overspeed detection, it has the characteristics of instant trigger and fast response, thus improving the response time of the safety protection device braking.

The elevator of the utility model has a higher safety of the elevator overspeed braking due to the speed limiter's capturing response time and fast response.

Description of drawings

Fig. 1 is the front view structure schematic diagram of the speed limiter of Embodiment 1 of the present invention;

Fig. 2 is the rear view structure schematic diagram of the speed limiter of the utility model embodiment 1;

Fig. 3 is A-A part sectional view in Fig. 2;

Fig. 4 is an enlarged view of part I in Fig. 3;

Fig. 5 is the structural representation of the wheel axle of Embodiment 1 of the present invention;

Fig. 6 is the structural schematic diagram of the speed limiter of Embodiment 1 of the present utility model (omitting the outer ring of the sheave);

Fig. 7 is the structural schematic diagram of the brake block of Embodiment 1 of the present utility model;

8 is a schematic structural diagram of the speed limiter according to Embodiment 1 of the present invention.

Detailed ways

In order to illustrate the embodiments of the present utility model more clearly, the specific embodiments of the present utility model will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts. Obtain other implementations.

Example 1:

As shown in Figures 1-8, the speed limiter of this embodiment includes a wheel shaft 1, a sheave 2, a centrifugal mechanism and a brake block 3. The sheave 2 is coaxially mounted on the wheel shaft 1 through a bearing 4 to realize the rotation of the sheave. ; The brake block 3 and the centrifugal mechanism are installed on the sheave 2.

Specifically, the axle 1 includes a limit section 1a, a bearing installation section 1b, a shoulder section 1c, a brake disc 10 and an extended installation section 1e in sequence along its axial direction. The limit section 1a has a limit groove for installing the shaft. The retaining ring is used to limit the bearing 4 installed in the bearing installation section 1b. The outer diameter of the shoulder section 1c is larger than the outer diameter of the bearing installation section 1b. position, so as to limit the axial movement of the sheave 2. The brake disc 10 protrudes out of the sheave 2 for braking cooperation with the brake block 3 , and the extended installation section is used for the installation of the wheel axle 1 .

The sheave 2 includes the sheave outer ring 2a and the sheave inner ring 2b installed coaxially, and a friction plate 5 is arranged between the sheave outer ring 2a and the sheave inner ring 2b, so as to realize the sheave under the action of the spring force. A friction moment is generated between the outer ring 2a and the inner ring 2b of the sheave, thereby pulling the wire rope to generate a stable pulling force.

In order to facilitate the adjustment of the pulling force of the wire rope, the inner ring 2b of the sheave in this embodiment includes a main rim 2-1 and a friction adjusting ring 2-2 coaxially and fixedly installed on the main rim. The friction adjusting ring 2-1 and the Centrifugal mechanisms are located on both sides of the main rim 2-1 respectively. Adjustable elastic elements can be set between the friction adjusting ring 2-2 and the main rim 2-1 to preset positive pressure; The edge and the outer edge of the friction adjusting ring 2-2 form an installation groove, the inner ring 2-3 of the sheave outer ring 2a is embedded in the installation groove, and the two sides of the inner ring 2-3 of the sheave outer ring are The wheel rim 2-1 and the friction force adjusting ring 2-2 are frictionally matched by the friction plate 5, and the friction plate 5 has several pieces, which are evenly distributed along the circumferential direction of the installation groove.

The centrifugal mechanism of this embodiment includes a left centrifugal throwing block 6-1, a right centrifugal throwing block 6-2 and a connecting rod 7, and both the left centrifugal throwing block 6-1 and the right centrifugal throwing block 6-2 can be rotatably installed on the rope pulley. The main wheel rim 2-1 is connected with the rotating pair of both ends of the connecting rod 7 respectively, so as to realize the linkage of the left centrifugal throwing block 6-1 and the right centrifugal throwing block 6-2; wherein, the throwing of the right centrifugal throwing block 6-2 The output side is rotated to connect the brake block 3.

In addition, a guide column 8 is fixed to the main rim 2-1 of the sheave, and the guide column 8 is used to guide the movement of the braking member. The brake block 3 has a limit hole 3a, and the guide column 8 is movably fitted in the limit hole 3a to limit the reset stroke of the two centrifugal throwing blocks.

The braking surface of the brake pad 3 in this embodiment is an arc surface, and the braking surface of the brake pad has a knurling pattern 30 to increase the braking friction coefficient.

The outer peripheral surface of the brake disc 10 in this embodiment is a braking surface, which is used for braking cooperation with the braking surface of the brake pad; the braking surface of the brake disc 10 also has a knurling pattern 100, which further improves the braking friction coefficient .

When the speed limiter is in an overspeed state, the two centrifugal throwing blocks move together with the brake block until it fits the brake disc and locks itself to realize the sheave braking, so as to trigger instantaneously first, reduce the delay, improve the response, and avoid passing the brake step. Triggering affects the response time of the brake, and at the same time, the limit design on the structure of the centrifugal throwing block itself, the increase in impact strength, etc. can be omitted, thereby greatly reducing the manufacturing difficulty.

The right centrifugal throwing block in this embodiment is correspondingly provided with a speed regulating assembly, which is used to adjust the speed limit of the speed limiter and reset the speed limiter. Specifically, the speed control assembly is installed on the main rim 2-1 of the sheave, and includes a speed control spring 9-1, an adjustment rod 9-2 and a limit seat 9-3, and the right end of the speed control spring 9-1 is connected to On the right centrifugal throwing block away from its center of rotation (ie, the lowermost side), the left end of the speed regulating spring 9-1 is connected to the right end of the adjusting rod 9-2, and the adjusting rod 9-2 is telescopically fitted to the limit seat 9-3 To adjust the elongation of the speed regulating spring 9-1, so as to control the throwing out of the right centrifugal throwing block, the speed limit of the speed governor can be controlled; when the regulating rod 9-2 moves to the target position, the regulating rod 9-2 is fixed For the limiting seat 9-3, the specific fixing method is not described here, for example, fixing by fixing pins. In addition, it is not limited to the above-mentioned adjustment method as long as the existing structure can adjust the elongation of the speed control spring.

This embodiment also provides an elevator, using the speed limiter of this embodiment, the safety of overspeed braking is better.

Example 2:

The difference between the speed limiter of this embodiment and Embodiment 1 is:

The braking surface of the brake block is an inclined surface, or the brake block is a wedge block structure, and the guide column is replaced with the guide structure of the wedge block, as long as the brake block can be moved closer to the brake disc and fitted for braking;

For other structures, refer to Embodiment 1.

The elevator of this embodiment adopts the speed limiter of this embodiment.

Example 3:

The difference between the speed limiter of this embodiment and Embodiment 1 is:

The brake block and speed control assembly can also be installed on the left centrifugal throwing block to achieve structural diversification;

For other structures, refer to Embodiment 1.

The elevator of this embodiment adopts the speed limiter of this embodiment.

Example 4:

The difference between the speed limiter of this embodiment and Embodiment 1 is:

The outer ring of the sheave and the inner ring of the sheave are integrated in structure, instead of the friction plate and the spring adjustment structure, the friction force is generated by the wire rope and the rope groove. It is also possible to generate friction through an external brake wire rope.

For other structures, refer to Embodiment 1.

The elevator of this embodiment adopts the speed limiter of this embodiment.

It should be noted that the above embodiments can be freely combined as required. The above only describes the preferred embodiments and principles of the present invention in detail. For those of ordinary skill in the art, according to the idea provided by the present invention, there will be changes in the specific implementation, and these changes will It should also be regarded as the protection scope of the present invention.

Claims (10)

1. A speed limiter comprises a wheel shaft, a rope wheel rotatably arranged on the wheel shaft and a centrifugal mechanism arranged on the rope wheel, and is characterized in that the centrifugal mechanism comprises two centrifugal throwing blocks and a connecting rod, wherein the two centrifugal throwing blocks are rotatably arranged on the rope wheel and are respectively connected with rotating pairs at two ends of the connecting rod; the throwing-out side of one centrifugal throwing block is rotatably connected with a braking piece, and correspondingly, a brake disc is coaxially arranged on the wheel shaft;

when the speed limiter is in an overspeed state, the centrifugal swinging block is used for linking the braking piece to move to be attached to the brake disc so as to be in braking fit.

2. A speed limiter in accordance with claim 1 wherein the sheave is provided with guides for guiding and locking the movement of the braking member.

3. The speed governor of claim 2, wherein the guide is a guide post or block and the braking member has a limiting hole; the guide piece is movably matched with the limiting hole so as to limit the reset stroke of the centrifugal throwing block.

4. A speed limiter in accordance with any one of claims 1 to 3 wherein the braking surface of the brake is a ramped or cambered surface.

5. A speed limiter in accordance with claim 4 wherein the braking surface of the braking member has a knurl.

6. A speed limiter in accordance with claim 1 wherein the outer peripheral surface of the brake disc is a braking surface for braking engagement with a braking surface of a braking member; the braking surface of the brake disc has a knurl pattern.

7. The speed governor of any one of claims 1-3, wherein the sheave comprises an outer sheave ring and an inner sheave ring that are coaxially mounted, and a friction plate is disposed between the outer sheave ring and the inner sheave ring.

8. The speed governor of claim 7, wherein the inner sheave ring comprises a main rim and a friction force adjusting ring coaxially and fixedly mounted on the main rim, an outer edge of the main rim and an outer edge of the friction force adjusting ring form a mounting groove, an inner ring of the outer sheave ring is fitted in the mounting groove, and two sides of the inner ring of the outer sheave ring are respectively in friction fit with the main rim and the friction force adjusting ring through friction plates.

9. A speed limiter in accordance with any one of claims 1 to 3 wherein a centrifugal throw is provided with a speed regulation assembly for adjusting the speed limit of the speed limiter and for resetting the speed limiter.

10. Elevator, characterized in that a speed limiter according to any of claims 1-9 is used.

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