Block brake with adaptive brake shoes and elevator traction machine

Abstract

This application relates to a block brake with adaptive brake shoes and an elevator traction machine, belonging to the field of mechanical braking technology. The block brake with adaptive brake shoes is signal-connected to a control device and includes: an armature capable of changing its distance from the stationary iron core under the action of the on / off energization of an electromagnetic coil; a base fixedly connected to the armature; and a braking mechanism connected to the base and rotatable relative to the base, capable of moving with the armature to have braking and release states. In the braking state, the braking mechanism clamps the brake drum; in the release state, the braking mechanism separates from the brake drum. The braking mechanism includes a braking element rotatably connected to the base and an adjusting assembly. The adjusting assembly is configured to adjust the rotation angle of the braking element when the braking mechanism is in the release state, thereby preventing the braking element from contacting the brake drum. Through the above method, the contact area between the friction pad and the braking surface can be increased, while also improving the service life of the friction pad.

Description

[Technical Field]

[0001] This application relates to a block brake with adaptive brake shoes and an elevator traction machine, belonging to the field of mechanical braking technology. [Background Technology]

[0002] An elevator typically consists of a car and a traction machine. The car and traction machine are connected by steel cables, which are wound around the traction sheave of the traction machine. The traction sheave has deep grooves to ensure the steel cables are securely fixed and to provide friction. When the traction sheave rotates, the winding of the steel cables causes the car to rise or fall, thus achieving the elevator's movement.

[0003] The traction machine is also known as the elevator's drive unit. Currently, the drive unit using a block brake is the mainstream. In the block brake, the friction pads can slide back and forth along the hollow bolts under the drive of the armature. However, under the complex operating conditions of elevators, such as different system masses, different lifting heights, and whether the car is empty or full, the radial load on the drive unit varies greatly. This leads to significant differences in the displacement and deformation of the brake drum, making it difficult for the friction pads of the block brake to fully adhere to the braking surface. When the brake is applied, the contact area of ​​the braking surface is reduced, which can lead to a decrease in braking torque and safety hazards in severe cases. At the same time, due to the partial contact of the friction pads, the pressure increases, which greatly reduces the service life of the friction pads.

[0004] Therefore, it is necessary to improve the existing technology to overcome the aforementioned defects. [Summary of the Invention]

[0005] The purpose of this application is to provide a block brake with adaptive brake shoes and an elevator traction machine that can increase the contact area between the friction pad and the braking surface while also increasing the service life of the friction pad.

[0006] The purpose of this application is achieved through the following technical solution: a block brake with adaptive brake shoes, signal-connected to a control device, comprising:

[0007] The armature is configured to change the distance between itself and the stationary iron core under the action of switching the electromagnetic coil on and off;

[0008] The base is fixedly connected to the armature;

[0009] A braking mechanism, connected to the base and rotatable relative to the base, is configured to move with the armature to have a braking state and a released state; in the braking state, the braking mechanism holds the brake drum; in the released state, the braking mechanism separates from the brake drum.

[0010] The braking mechanism includes a brake element rotatably connected to the base and an adjustment assembly connecting the base and the brake element. The adjustment assembly is configured to adjust the rotation angle of the brake element when the braking mechanism is in the released state, so as to avoid the brake element contacting the brake drum.

[0011] In one embodiment, the braking member has a first end and a second end disposed opposite to each other, and the adjusting assembly includes a biasing member connecting the first end and the base, and an adjusting member connecting the second end and the armature;

[0012] The biasing member always applies a biasing force to the braking member so that the braking member always rotates toward the brake drum, so that there is a first gap between the first end and the base.

[0013] The adjusting member is used to adjust the second distance between the second end and the base so that the second distance is always equal to the first distance.

[0014] In one embodiment, the adjustment component further includes a first detection element disposed at the first end and a second detection element disposed at the second end, the first detection element being configured to detect the first spacing and the second end being configured to detect the second spacing;

[0015] When the first spacing and the second spacing are inconsistent, the control device controls the adjusting member to adjust the second spacing.

[0016] In one embodiment, the biasing member includes a guide post connected to the base and an elastic body sleeved on the guide post.

[0017] In one embodiment, the adjusting member includes a connector and a force-applying body connected to the connector;

[0018] The force-applying body is connected to an external robotic arm, and the control device controls the robotic arm to rotate and move the adjusting component.

[0019] In one embodiment, the biasing member has a first connection point with the first end, and the adjusting member has a second connection point with the second end;

[0020] Along the height direction of the armature, the first connection point and the second connection point are located on the same vertical line; or, the first connection point and the second connection point are arranged diagonally.

[0021] In one embodiment, the braking element is connected to the base via a rotating shaft;

[0022] The base has a first central portion, the brake has a second central portion, and the rotating shaft connects the first central portion and the second central portion.

[0023] In one embodiment, the brake has a clearance portion adapted to accommodate the base so that the first central portion and the second central portion at least partially overlap.

[0024] In one embodiment, the block brake with adaptive brake shoes further includes a third detection element for detecting the thickness of the brake element, and the control device issues an alarm when the detected thickness value of the third detection element is less than or equal to a preset thickness value in the control device.

[0025] This application also provides an elevator traction machine, which includes at least the block brake with adaptive brake shoes as described above.

[0026] Compared with the prior art, this application has the following beneficial effects: The braking mechanism of this application includes a braking element rotatably connected to the base, and an adjusting assembly connecting the base and the braking element. When the braking element is in contact with the brake drum after displacement and / or deformation, it can rotate relative to the brake drum to contact the brake surface of the brake drum, thereby increasing the contact area and avoiding local contact between the braking element and the brake surface of the brake drum, which would cause greater local wear on the braking element and improve the overall service life of the braking element and the brake. Furthermore, the adjusting assembly is configured to adjust the rotation angle of the braking element when the braking mechanism is in the released state to avoid contact between the braking element and the brake drum, thereby preventing one end of the braking element from contacting the brake surface of the brake drum when the braking mechanism is in the released state, which would cause wear on the braking element caused by the brake drum, further improving the service life of the braking element and the brake. [Attached Image Description]

[0027] Figure 1 This is a schematic diagram of the block brake with adaptive brake shoes according to this application.

[0028] Figure 2 This is a cross-sectional schematic diagram of the block brake with adaptive brake shoes according to this application.

[0029] Figure 3 This is a control schematic diagram of the block brake with adaptive brake shoes according to this application.

Detailed Implementation Methods

[0030] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0031] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0032] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0033] Please see Figures 1 to 3 As shown, a preferred embodiment of this application discloses a block brake with adaptive brake shoes, installed in an elevator traction machine. It is suitable for engaging or disengaging the brake drum in the elevator traction machine, thereby braking the brake drum. Specifically, when the elevator needs to stop, the block brake with adaptive brake shoes applies pressure to the brake drum, generating friction to prevent the brake drum from rotating, thus stopping the elevator car. When the block brake with adaptive brake shoes disengages from the brake drum, the brake drum continues to rotate, driving the elevator car to continue operating.

[0034] The block brake with adaptive brake shoes is signal-connected to the control device 7. The block brake with adaptive brake shoes can send signals to the control device 7, and the control device 7, based on the received signal information, controls the block brake with adaptive brake shoes to execute corresponding commands. For example, it controls the block brake with adaptive brake shoes to engage with or disengage from the brake drum; or it controls the components of the block brake with adaptive brake shoes to perform relevant angle adjustments, etc., which will be described in detail below.

[0035] The control device 7 is the same as the control device 7 in the elevator, which includes control circuits, microcontrollers, etc., and has a conventional structure, which will not be described in detail here. It is worth noting that this application does not improve the control program of the control device 7, and its conventional comparison and judgment can be implemented by conventional circuits such as logic circuits.

[0036] Specifically, the block brake with adaptive brake shoes includes an armature 1, a base 2 fixedly connected to the armature 1, and a braking mechanism 3 connected to the base 2.

[0037] Armature 1 is configured to change its distance from the stationary iron core under the influence of the switching on and off of the electromagnetic coil. When the electromagnetic coil is energized, a magnetic field is generated, and armature 1 is attracted to the stationary iron core under the influence of the magnetic field, thus moving towards the stationary iron core and causing the braking mechanism 3 to disengage from the brake drum. When the electromagnetic coil is de-energized, the magnetic field disappears, and armature 1 returns to its original position under the action of the return spring, thereby pushing the braking mechanism 3 to press against the brake drum. That is, armature 1 can convert electrical energy into mechanical displacement, controlling the "brake engagement" and "brake release" of the braking mechanism 3. The aforementioned "brake engagement" can also be referred to as the braking state, and the "brake release" can also be referred to as the release state, which are described in detail below.

[0038] As mentioned above, since armature 1 can move under the influence of a magnetic field, the material used to manufacture armature 1 can be a high-permeability soft magnetic material, such as electrical pure iron or silicon steel. No specific limitation is made here; the choice depends on the actual situation. The aforementioned materials ensure rapid magnetization or demagnetization, with a response time typically less than or equal to 0.1 seconds. Furthermore, the surface of armature 1 needs to be rust-proofed, for example, by galvanizing the surface to prevent adhesion and failure due to the humid environment of the elevator shaft.

[0039] The base 2 is fixedly connected to the armature 1. In this embodiment, the armature 1 and the base 2 are fixedly connected by fixing bolts. In other embodiments, the base 2 and the armature 1 can also be fixedly connected by welding or other methods. This is not specifically limited and depends on the actual situation.

[0040] The base 2 includes a first base 21, a second base 22 arranged symmetrically, and a connecting base 23 connecting the first base 21 and the second base 22. Fixing bolts are provided at the first base 21 and the second base 22.

[0041] The braking mechanism 3 is connected to the base 2 and can rotate relative to the base 2. The braking mechanism 3 is configured to move with the armature 1 to have a braking state and a release state. When in the braking state, the braking mechanism 3 clamps the brake drum; when in the release state, the braking mechanism 3 separates from the brake drum. The braking state and release state here are the "brake holding" and "brake releasing" mentioned above.

[0042] The braking mechanism 3 includes a brake element 31 rotatably connected to the base 2 and an adjustment assembly connecting the base 2 and the brake element 31. The adjustment assembly is configured to adjust the rotation angle of the brake element 31 when the braking mechanism 3 is in the released state, so as to avoid the brake element 31 contacting the brake drum. That is, when the braking mechanism 3 is in the released state, since the brake element 31 can rotate relative to the base 2, and the brake drum may deform and displace during operation due to factors such as weight and lifting height. By setting the brake element 31 to be rotatable relative to the base 2, even if the brake drum is displaced, it can still be brought into contact with the brake drum and the corresponding angle can be adjusted, avoiding damage to the brake element 31 due to an insufficient contact area between the brake element 31 and the brake drum.

[0043] In this embodiment, the brake element 31 is connected to the base 2 via a rotating shaft 34; the base 2 has a first central portion, and the brake element 31 has a second central portion 313, with the rotating shaft 34 connecting the first central portion and the second central portion 313. This arrangement allows the brake element 31 to rotate based on the central portion, thereby better adapting and fitting to the braking surface of the brake drum, further ensuring the contact area between the two.

[0044] The first central portion of the base 2 is disposed on the connecting seat 23. The brake member 31 includes a brake shoe 311 and a mounting portion 312 connected to the brake shoe 311, and a second central portion 313 is disposed on the mounting portion 312.

[0045] The brake member 31 has a clearance portion adapted to accommodate the base 2 so that the first center portion and the second center portion 313 at least partially overlap. In this embodiment, the clearance portion is formed on the mounting portion 312.

[0046] Furthermore, the brake member 31 has a first end and a second end that are disposed opposite to each other. The adjustment assembly includes a biasing member 32 that connects the first end and the base 2, and an adjustment member 33 that connects the second end and the armature 1. The biasing member 32 always applies a biasing force to the brake member 31 so that the brake member 31 always rotates toward the brake drum so that there is a first gap between the first end and the base 2. The adjustment member 33 is used to adjust the second gap between the second end and the base 2 so that the second gap is always equal to the first gap.

[0047] With the above configuration, when the braking mechanism 3 is in the released state, since the braking mechanism 3 is separated from the brake drum, the first end of the braking element 31 may continue to contact the brake surface of the brake drum under the action of the biasing element 32, while the adjusting element 33 drives the second end to move away from the base 2. Because the braking element 31 rotates relative to the second center portion 313 via the rotating shaft 34, when the second end moves away from the base 2, the first end moves closer to the base 2. When the second distance is equal to the first distance, the distance between the braking element 31 and the brake surface of the brake drum can be kept uniform.

[0048] When the brake element 31 is in the braking state, the biasing element 32 always applies a biasing force to the brake element 31, causing it to rotate towards the brake drum, thus keeping the brake element 31 in contact with the brake surface of the brake drum. At this time, because the armature 1 drives the entire brake to move towards the brake drum, the adjusting element 33 can drive the second end to move away from the base 2, so that both the first end and the second end can contact the brake surface of the brake drum, ensuring the contact area between the brake element 31 and the brake surface.

[0049] The biasing component 32 includes a guide post connected to the base 2 and an elastic body sleeved on the guide post. In this embodiment, the elastic body is a spring. The adjusting component 33 includes a connecting body and a force-applying body connected to the connecting body; the force-applying body is connected to an external robot, and the control device 7 controls the robot to rotate the adjusting component 33.

[0050] The biasing member 32 has a first connection point with the first end, and the adjusting member 33 has a second connection point with the second end; along the height direction of the armature 1, the first connection point and the second connection point are located on the same vertical line; or, the first connection point and the second connection point are set diagonally. The purpose of this arrangement is to further ensure that the first distance between the first end and the base 2 and the second distance between the second end and the base 2 remain equal during the adjustment process of the adjusting member 33.

[0051] The adjustment assembly further includes a first detection element 4 disposed at a first end and a second detection element 5 disposed at a second end. The first detection element 4 is configured to detect a first gap, and the second end is configured to detect a second gap. When the first gap and the second gap are inconsistent, the control device 7 controls the adjustment element 33 to adjust the second gap. In this embodiment, the first detection element 4 and the second detection element 5 are distance sensors or infrared sensors, etc.

[0052] The block brake with adaptive brake shoes also includes a third detection element 6 for detecting the thickness of the brake element 31. When the detected thickness value of the third detection element 6 is less than or equal to a preset thickness value in the control device 7, the control device 7 issues an alarm. In this embodiment, the third detection element 6 is a thickness sensor.

[0053] This application also provides an elevator traction machine, including at least the block brake with adaptive brake shoes as described above.

[0054] In summary, the braking mechanism 3 of this application includes a brake element 31 rotatably connected to the base 2 and an adjustment assembly connecting the base 2 and the brake element 31. When the brake element 31 is in contact with the brake drum after displacement and / or deformation, it can rotate relative to the brake drum to contact the brake surface of the brake drum, thereby increasing the contact area and avoiding local contact between the brake element 31 and the brake surface of the brake drum, which would cause greater local wear on the brake element 31 and improve the overall service life of the brake element 31 and the brake. Furthermore, the adjustment assembly is configured to adjust the rotation angle of the brake element 31 when the braking mechanism 3 is in the released state to avoid contact between the brake element 31 and the brake drum, thereby preventing one end of the brake element 31 from contacting the brake surface of the brake drum when the braking mechanism 3 is in the released state, which would cause wear on the brake element 31 caused by the brake drum, further improving the service life of the brake element 31 and the brake.

[0055] The above is only one specific implementation of this application, and any other improvements made based on the concept of this application shall be considered within the scope of protection of this application.

Claims

1. A block brake with self-adapting shoes, connected to a control device signal, characterized in that, include: The armature is configured to change the distance between itself and the stationary iron core under the action of switching the electromagnetic coil on and off; The base is fixedly connected to the armature; A braking mechanism, connected to the base and rotatable relative to the base, is configured to move with the armature to have a braking state and a released state; in the braking state, the braking mechanism holds the brake drum; in the released state, the braking mechanism separates from the brake drum. The braking mechanism includes a brake element rotatably connected to the base and an adjustment assembly connecting the base and the brake element. The adjustment assembly is configured to adjust the rotation angle of the brake element when the braking mechanism is in the released state, so as to avoid the brake element contacting the brake drum.

2. The block brake with self-adapting shoes as claimed in claim 1, characterized in that The braking component has a first end and a second end that are disposed opposite to each other, and the adjusting component includes a biasing component connecting the first end and the base, and an adjusting component connecting the second end and the armature; The biasing member always applies a biasing force to the braking member so that the braking member always rotates toward the brake drum, so that there is a first gap between the first end and the base. The adjusting member is used to adjust the second distance between the second end and the base so that the second distance is always equal to the first distance.

3. The block brake with adaptive brake shoes as described in claim 2, characterized in that, The adjustment component further includes a first detection element disposed at the first end and a second detection element disposed at the second end, wherein the first detection element is configured to detect the first spacing and the second end is configured to detect the second spacing; When the first spacing and the second spacing are inconsistent, the control device controls the adjusting member to adjust the second spacing.

4. The block brake with adaptive brake shoes as described in claim 2, characterized in that, The biasing component includes a guide post connected to the base and an elastic body sleeved on the guide post.

5. The block brake with adaptive brake shoes as described in claim 2, characterized in that, The adjusting component includes a connecting body and a force-applying body connected to the connecting body; The force-applying body is connected to an external robotic arm, and the control device controls the robotic arm to rotate and move the adjusting component.

6. The block brake with adaptive brake shoes as described in claim 2, characterized in that, The biasing member has a first connection point with the first end, and the adjusting member has a second connection point with the second end; Along the height direction of the armature, the first connection point and the second connection point are located on the same vertical line; or, the first connection point and the second connection point are arranged diagonally.

7. The block brake with adaptive brake shoes as described in any one of claims 1 to 5, characterized in that, The braking component is connected to the base via a rotating shaft; The base has a first central portion, the brake has a second central portion, and the rotating shaft connects the first central portion and the second central portion.

8. The block brake with adaptive brake shoes as described in claim 7, characterized in that, The brake member has a clearance portion adapted to accommodate the base so that the first central portion and the second central portion at least partially overlap.

9. The block brake with adaptive brake shoes as described in any one of claims 1 to 5, characterized in that, The block brake with adaptive brake shoes also includes a third detection element for detecting the thickness of the brake element. When the thickness value detected by the third detection element is less than or equal to a preset thickness value in the control device, the control device issues an alarm.

10. An elevator traction machine, characterized in that, It includes at least a block brake with adaptive brake shoes as claimed in any one of claims 1 to 9.

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