Shoe assembly and elevator

Abstract

The utility model discloses a brake shoe assembly and elevator relates to elevator technical field, wherein, a brake shoe assembly, include: base, brake piece and friction piece, base has opposite first side and second side in first direction, the first side is used for setting to brake wheel, brake piece fixed setting in the first side of base is used for with brake wheel abut, friction piece sets up the circumferential side of brake piece, and one end is connected with base, and the other end is located between the position of two sides of brake piece in first direction, is used for abutting with brake wheel after brake piece wear, the utility model discloses the technical scheme that provides through the abutment of friction piece and brake wheel after brake piece wear a certain amount, when brake wheel rotates, the friction between friction piece and brake wheel emits sharp noise, to reach the technical effect of prompting maintenance personnel to replace brake piece in time.

Description

Technical Field

[0001] This utility model relates to the field of elevator technology, and in particular to a brake shoe assembly and an elevator. Background Technology

[0002] Elevators play an increasingly important role in vertical transportation in modern buildings and transportation systems. Their operation must meet core performance indicators such as safety and reliability, high efficiency, precise leveling, and passenger comfort. To ensure equipment safety, elevator systems must be equipped with comprehensive safety protection devices to enable emergency braking in the event of a malfunction.

[0003] Currently, elevators and escalators generally use friction-type electromechanical brakes as their core braking system. The working principle of this system is as follows: when the power supply or control circuit fails, the brake spring drives the brake arm to move, causing the brake shoes to engage with the rotating brake wheel through friction, thus stopping the elevator. However, when the brake shoes wear down, the braking torque decreases. This can affect the elevator's normal braking performance, or even lead to brake failure and serious safety accidents.

[0004] Under the current maintenance system, the wear condition of brake shoes relies entirely on manual periodic inspections. This model has obvious management defects: on the one hand, excessive wear of brake shoes and pads may not be detected in time due to maintenance oversights; on the other hand, between two maintenance intervals, brake shoes and pads may have exceeded the safe wear limit but are still in use, creating a major safety hazard. Utility Model Content

[0005] The main purpose of this utility model is to propose a brake shoe assembly and an elevator, which can automatically alarm when the brake pads are worn to a certain extent, so as to remind maintenance personnel to replace the brake pads in time.

[0006] To achieve the above objectives, the brake shoe assembly proposed in this utility model includes: a base, a brake pad, and a friction element; the base has a first side and a second side facing each other in a first direction, the first side being arranged towards the brake wheel; the brake pad is fixedly disposed on the first side of the base for contacting the brake wheel; the friction element is disposed on the periphery of the brake pad, with one end connected to the base and the other end located between the two sides of the brake pad in the first direction, for contacting the brake wheel after the brake pad wears down.

[0007] In one embodiment, two friction elements are provided, respectively disposed on both sides of the base in a second direction.

[0008] In one embodiment, the friction element is disposed on one side of the brake pad in a second direction, and the friction element includes:

[0009] The connecting part extends along the second direction and is fixedly connected to the base at one end;

[0010] The friction part extends along a first direction, with one end located between the two sides of the brake pad in the first direction. The other end of the friction part in the first direction is fixedly connected to the other end of the connecting part in the second direction, and the friction part and the brake pad are spaced apart in the second direction.

[0011] In one embodiment, the friction element is at least partially elastically configured.

[0012] In one embodiment, the brake shoe assembly further includes a scale, which is fixedly installed on one side of the base in a third direction. The scale has a measuring portion extending in a first direction, and the measuring portion is provided with length graduations.

[0013] In one embodiment, mounting grooves are provided on both third-direction sides of the base to accommodate a portion of the scale; and / or,

[0014] The scale is riveted to the base by three rivets, and the line connecting the riveting positions of the three rivets forms a triangle.

[0015] In one embodiment, the ruler includes a plastic ruler.

[0016] In one embodiment, the first side of the base is provided with a plurality of threaded holes, and the brake pad is provided with a plurality of countersunk holes that extend along a first direction. The plurality of threaded holes and the plurality of countersunk holes are provided in correspondence for the plurality of studs to be connected through.

[0017] In one embodiment, the brake pad has a heat dissipation groove on the side opposite to the base, the heat dissipation groove extends along a third direction, and a plurality of grooves are spaced apart along a second direction.

[0018] This utility model also proposes an elevator, which includes a brake shoe assembly. The brake shoe assembly includes a base, a brake pad, and a friction element. The base has a first side and a second side facing each other in a first direction. The first side is arranged facing the brake wheel. The brake pad is fixedly disposed on the first side of the base and is used to abut against the brake wheel. The friction element is disposed on the periphery of the brake pad, with one end connected to the base and the other end located between the two sides of the brake pad in the first direction, and is used to abut against the brake wheel after the brake pad wears out.

[0019] The technical solution of this utility model is that after the brake pads wear down to a certain extent, the friction component comes into contact with the brake wheel. When the brake wheel rotates, the friction between the friction component and the brake wheel generates a sharp noise, so as to remind maintenance personnel to replace the brake pads in time. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of an embodiment of the brake shoe assembly provided by this utility model;

[0022] Figure 2 for Figure 1 Front view of the central brake shoe assembly.

[0023] Explanation of icon numbers:

[0024] 100. Brake shoe assembly; 1. Base; 11. Mounting groove; 12. Countersunk hole; 13. Heat dissipation groove; 2. Brake pad; 3. Friction component; 31. Connecting part; 32. Friction component; 4. Scale; 41. Measuring part.

[0025] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0027] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0029] Under the current maintenance system, the wear condition of brake shoes relies entirely on manual periodic inspections. This model has obvious management defects: on the one hand, excessive wear of brake shoes and pads may not be detected in time due to maintenance oversights; on the other hand, between two maintenance intervals, brake shoes and pads may have exceeded the safe wear limit but are still in use, creating a major safety hazard.

[0030] This utility model proposes a brake shoe assembly.

[0031] Please see Figure 1 and Figure 2 In one embodiment of the present invention, the brake shoe assembly 100 includes: a base 1, a brake pad 2, and a friction member 3; the base 1 has a first side and a second side opposite to each other in a first direction, the first side being disposed toward the brake wheel; the brake pad 2 is fixedly disposed on the first side of the base 1 for abutting against the brake wheel; the friction member 3 is disposed on the periphery of the brake pad 2, with one end connected to the base 1 and the other end located between the two sides of the brake pad 2 in the first direction, for abutting against the brake wheel after the brake pad 2 wears.

[0032] In this invention, the base 1 serves as a connecting part 31 or a transmission component. The base 1 has a through-hole along a third direction for connecting with other components in the braking system. Reinforcing ribs are provided on the base 1 to enhance its overall strength. A brake pad 2 is positioned on the first side of the base 1 facing the brake wheel. After the brake pad 2 rubs against the brake wheel, the friction between them slows the brake wheel down, thereby reducing the elevator's operating speed. To prevent the brake pad 2 from becoming completely worn before contacting and rubbing against the brake wheel, which would pose a significant safety hazard, a friction element 3 is needed to contact the brake wheel when the brake pad 2 is partially worn. Therefore, one end of the friction element 3 is located between the two sides of the brake pad 2 in the first direction, allowing it to contact and rub against the brake wheel after the brake pad 2 has worn down, triggering an alarm sound. To produce a sharp alarm sound from the friction element 3 against the brake wheel, the friction element 3 is generally made of metal. Therefore, when a sharp alarm sound is heard during elevator operation, it indicates that the brake pad 2 needs to be replaced, providing a good warning effect.

[0033] Generally, the brake pad 2 is about the same thickness as the brake wheel, so when the friction element 3 is located on both sides of the base 1 in the first direction, it is difficult for the friction element 3 to abut against the brake wheel in the first direction. Therefore, the friction element 3 needs to be located on one side of the base 1 in the second direction. To improve the alarm sound generated by friction, multiple friction pads are provided. Generally, there are two friction elements 3, respectively located on both sides of the base 1 in the second direction. The friction element 3 is fixedly installed on the base 1, and the specific installation method can be riveting or screw connection.

[0034] In order to make the friction sound (i.e. the alarm sound) between the friction pad and the brake wheel sharper as the remaining thickness of the brake pad 2 is smaller, the friction element 3 is at least partially elastic. When the remaining thickness of the brake pad 2 is smaller, the elastic deformation of the friction element 3 is greater, the pressure between the two is greater, the friction force is greater, and the friction sound generated during rotation is greater.

[0035] The friction element 3 is disposed on one side of the brake pad 2 in the second direction. If the friction element 3 is in close contact with the brake pad 2 and the base 1, the brake wheel will rotate in both directions. When the brake wheel rotates forward, the friction element 3 will deform in the direction away from the brake pad 2. When the brake wheel rotates in the reverse direction, the friction element 3 will deform in the direction closer to the brake pad 2. Because the friction element 3 is in close contact with the brake pad 2, it cannot deform in this direction and can only deform towards the base 1. This results in significant stress at the connection between the friction element 3 and the base 1, which can easily cause the friction element 3 to break at the connection. To avoid this situation, the part of the friction element 3 that rubs against the brake wheel needs to be spaced apart from the brake pad 2 in the second direction. Please refer to [link to relevant documentation]. Figure 1Regardless of whether the brake wheel rotates clockwise or counterclockwise, the contact portion of the friction element 3 can generate displacement in the corresponding second direction. Therefore, in one embodiment, specifically, the friction element 3 is disposed on one side of the brake pad 2 in the second direction. The friction element 3 includes: a connecting portion 31 extending along the second direction, one end of which is fixedly connected to the base 1; and a friction portion 32 extending along the first direction, one end of which is located between the two sides of the brake pad 2 in the first direction. The other end of the friction portion 32 in the first direction is fixedly connected to the other end of the connecting portion 31 in the second direction, such that the friction portion 32 and the brake pad 2 are spaced apart in the second direction.

[0036] Before the brake pad 2 wears down to the point where the friction element 3 can contact the brake wheel, maintenance personnel need to understand the condition of the brake pad 2 during inspections (already worn thickness, remaining thickness, and the approximate remaining service life can be estimated based on the remaining thickness). Therefore, the brake shoe assembly 100 also includes a scale 4, which is fixedly installed on one side of the base 1 in a third direction, that is, on the side of the brake pad 2 in a third direction. The scale 4 has a measuring part 41 extending in a first direction, and the measuring part 41 is provided with length graduations. The remaining thickness of the brake pad 2 can be determined from the graduations on the measuring part 41. To facilitate reading during maintenance, two scales 4 are provided, one on each side of the base 1 in a third direction, so that maintenance personnel can read and measure from either side of the brake pad 2 in a third direction. If the length of the scale 4 protrudes beyond the side of the brake pad 2 facing the brake wheel in the first direction, it will affect the contact between the brake pad 2 and the brake wheel. Therefore, the scale 4 is made of a wear-resistant material so that the scale 4 wears down synchronously with the brake pad 2. The maximum remaining reading on the scale 4 is the thickness of the brake pad 2. In one embodiment, the ruler 4 includes a plastic ruler 4.

[0037] If the scale 4 is riveted to the base 1 by only one rivet, the scale 4 can rotate along the riveted joint. Especially due to the friction of the brake wheel, the extension direction of the measuring part 41 of the scale 4 and the thickness direction of the brake pad 2 are no longer in the same direction, causing a deflection and resulting in inaccurate readings. To solve this problem, it is necessary to prevent the scale 4 from rotating. In one embodiment, mounting grooves 11 are provided on both sides of the base 1 in the third direction to partially accommodate the scale 4, thus limiting the scale 4 and preventing it from swinging in the second direction. In another embodiment, three rivets are used to rivet the scale 4 to the base 1, with the lines connecting the three rivet positions forming a triangle. This triangle provides stability and prevents the scale 4 from swinging or rotating in the second direction. In yet another embodiment, mounting grooves 11 can be provided on the base 1 simultaneously, and then connected by rivets to achieve complete positioning of the scale 4.

[0038] To securely mount the brake pad 2 to the base 1, the base 1 has multiple threaded holes on its first side, and the brake pad 2 has multiple countersunk holes 12 extending along a first direction. The threaded holes and countersunk holes 12 correspond to each other, allowing multiple studs to pass through and connect. The countersunk holes 12 on the brake pad 2 are provided to prevent contact between the studs and the brake wheel. Furthermore, considering the mounting method of the friction element 3, the friction element 3 can also be connected via screw connections. Therefore, the mounting position of the friction element 3 can correspond to the threaded holes, which are through holes. This allows the same stud to pass through the brake pad 2, the base 1, and the friction connection, fixing the three together. This simplifies the installation process and reduces the number of screw connections.

[0039] When brake pad 2 operates during prolonged or high-intensity braking, it generates a significant amount of heat. If this heat cannot dissipate in time, the temperature of brake pad 2 will rise rapidly, leading to a decline in its material properties, such as reduced rigidity and friction coefficient. This phenomenon is called thermal fade. Thermal fade directly affects braking performance and may even cause brake failure. Therefore, by providing heat dissipation grooves 13, the temperature of brake pad 2 can be effectively reduced, thereby delaying the occurrence of thermal fade. Heat dissipation grooves 13 are provided on the side of brake pad 2 facing away from the base 1. These grooves extend along a third direction and are spaced apart along a second direction. The design of the heat dissipation grooves 13 increases the contact area between brake pad 2 and air, promoting airflow and accelerating heat dissipation. This design not only aids in heat dissipation but also, to some extent, prevents the accumulation of debris and moisture on the surface of brake pad 2, maintaining good contact between brake pad 2 and the brake wheel. Furthermore, the heat dissipation grooves 13 also help remove wear debris generated during braking, preventing these impurities from affecting braking performance.

[0040] This utility model also proposes an elevator, which includes a brake shoe assembly 100. The specific structure of the brake shoe assembly 100 is as described in the above embodiments. Since this elevator adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be described in detail here. The brake shoe assembly 100 includes: a base 1, a brake pad 2, and a friction member 3; the base 1 has a first side and a second side opposite to each other in a first direction, the first side being arranged facing the brake wheel; the brake pad 2 is fixedly disposed on the first side of the base 1 for abutting against the brake wheel; the friction member 3 is disposed on the periphery of the brake pad 2, with one end connected to the base 1 and the other end located between the two sides of the brake pad 2 in the first direction, for abutting against the brake wheel after the brake pad 2 wears.

[0041] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A shoe assembly, comprising: include: The base has a first side and a second side opposite to each other in a first direction, the first side being positioned toward the brake wheel; A brake pad is fixedly disposed on the first side of the base and is used to abut against the brake wheel; A friction element is disposed on the periphery of the brake pad, with one end connected to the base and the other end located between the two sides of the brake pad in a first direction, for abutting against the brake wheel after the brake pad wears.

2. The shoe assembly of claim 1, wherein, Two friction elements are provided, respectively located on both sides of the base in the second direction.

3. The shoe assembly of claim 2, wherein, The friction element is disposed on one side of the brake pad in the second direction, and the friction element includes: The connecting part extends along the second direction and is fixedly connected to the base at one end; The friction part extends along a first direction, with one end located between the two sides of the brake pad in the first direction. The other end of the friction part in the first direction is fixedly connected to the other end of the connecting part in the second direction, and the friction part and the brake pad are spaced apart in the second direction.

4. The shoe assembly of claim 1, wherein, The friction element is at least partially elastically configured.

5. The shoe assembly of claim 1, wherein, The brake shoe assembly also includes a scale, which is fixedly installed on one side of the base in a third direction. The scale has a measuring part extending in a first direction, and the measuring part is provided with length graduations.

6. The shoe assembly of claim 5, wherein, The base has mounting slots on both sides in the third direction to accommodate a portion of the scale; and / or, The scale is riveted to the base by three rivets, and the line connecting the riveting positions of the three rivets forms a triangle.

7. The shoe assembly of claim 5, wherein, The ruler includes a plastic ruler.

8. The shoe assembly of claim 1, wherein, The base has multiple threaded holes on its first side, and the brake pad has multiple countersunk holes that extend along the first direction. The multiple threaded holes and the multiple countersunk holes are provided to allow multiple studs to be inserted and connected respectively.

9. The shoe assembly of claim 1, wherein, The brake pad has a heat dissipation groove on the side opposite to the base. The heat dissipation groove extends along a third direction and is spaced out in multiple places along a second direction.

10. An elevator characterized by Includes the brake shoe assembly as described in any one of claims 1 to 9.

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