Brake release device

Abstract

The utility model discloses a brake release device, which relates to the technical field of special equipment and comprises a driving lever component, an ejector rod and a locking component. The deflector rod assembly comprises a first deflector rod and a second deflector rod which are hinged to each other, a base is formed at the top end of the first deflector rod, an abutting part is formed at the top end of the second deflector rod, and a mounting cavity formed in the first direction is formed in the base; the ejector rod extends in the first direction and is movably arranged in the mounting cavity in a penetrating mode so that the position of the base relative to the ejector rod can be adjusted, the locking assembly comprises a sliding block and a maintaining piece, the sliding block is movably arranged in the mounting cavity, a through hole communicated with the mounting cavity is formed in the sliding block so that the ejector rod can penetrate through the through hole, and the maintaining piece is used for making the sliding block abut against the ejector rod in the natural state. And under the action of external force, the sliding block is separated from the ejector rod. According to the technical scheme provided by the utility model, the working distance of the brake releasing device in the brake can be quickly adjusted, and the working efficiency of inspection is improved.

Description

Technical Field

[0001] This utility model relates to the field of special equipment technology, and in particular to a brake release device. Background Technology

[0002] The brake is a crucial safety component of an elevator. Its failure can lead to serious consequences such as the car bottoming out, overshooting, or operating with the doors open. Therefore, in addition to electrical braking, the elevator braking system should also include a mechatronic friction brake, which combines the functions of parking and traveling brakes. The main types of elevator brakes are drum brakes and disc brakes. Drum brakes, due to their simple structure and lower cost, are widely used in asynchronous motor traction machines and a significant portion of synchronous motor traction machines, including the vast majority of freight elevators and a considerable number of passenger elevators.

[0003] To check the braking capacity of a single brake set, a manual release wrench that can open another brake set is needed. Existing manual release wrenches for drum brakes primarily use a screw-type adjustment mechanism. However, this design has the following drawbacks: In elevators, due to differences in brand, model, and specifications, the distance between the brake arm and the coil end cover varies. To accommodate brakes with different distances, the adjusting screw needs to be rotated to change the distance. When the distance difference between different brakes is significant, rotating the adjusting screw takes a considerable amount of time, significantly impacting inspection efficiency. Utility Model Content

[0004] The main purpose of this utility model is to propose a brake release device, which aims to quickly adjust the working distance of the brake release device in the brake and improve the efficiency of inspection work.

[0005] To achieve the above objectives, this utility model proposes a brake release device for use in elevator drum brakes, comprising:

[0006] The lever assembly includes a first lever and a second lever that are hinged to each other. The top end of the first lever has a base, and the top end of the second lever has a pressing part. The pressing part is used to press against the brake arm of the elevator drum brake. The base has an installation cavity that is opened along a first direction.

[0007] A push rod, extending along a first direction and movably passing through the mounting cavity, allows the position of the base relative to the push rod to be adjustable; the push rod is used to press against the coil end cover of the elevator drum brake; and...

[0008] The locking assembly includes a slider and a retainer. The slider is movably disposed within the mounting cavity, and the slider has a through hole communicating with the mounting cavity for the push rod to pass through. The retainer is used to allow the slider to abut against the push rod in its natural state, and to disengage the slider from the push rod under the action of an external force.

[0009] In one embodiment, a tooth is provided inside the through hole, and the tooth abuts against the top rod under the action of the retainer.

[0010] In one embodiment, the through hole includes a strip-shaped groove extending in a second direction, within which the push rod can slide.

[0011] In one embodiment, the through hole further includes a mounting groove, which communicates with the strip groove, and the insert tooth is disposed within the mounting groove.

[0012] In one embodiment, the push rod includes a screw that can engage with the insert teeth.

[0013] In one embodiment, the end of the screw that abuts against the coil end cap of the elevator drum brake is provided with a pointed angle.

[0014] In one embodiment, the retainer includes an elastic element disposed between the slider and the mounting cavity to provide elastic force to abut the slider against the push rod.

[0015] In one embodiment, the mounting cavity has a sliding channel in a second direction, and the slider has a button protruding outward from the sliding channel, the button being able to slide within the sliding channel.

[0016] In one embodiment, the slider has a protrusion on one side in the third direction, and the elastic element is arranged along the second direction, with one end abutting against the protrusion and the other end abutting against the inner wall of the mounting cavity.

[0017] In one embodiment, the brake release device further includes a lever assembly comprising a first wall and a second arm hinged to each other, the top end of the first arm being hinged to the bottom end of the second lever, and the top end of the second arm being hinged to the bottom end of the first lever.

[0018] The technical solution of this utility model utilizes a first and second lever that are hinged together, with a base at the top of the first lever and a pressing part at the top of the second lever. This cleverly leverages the flexibility of the hinge structure, allowing the pressing part to easily press against the brake arm of the elevator drum brake, thus enabling operation of the brake arm. Simultaneously, the mounting cavity inside the base provides space and guidance for the movement of the push rod, ensuring the stability of the entire lever assembly. The push rod, extending along a first direction, moves through the mounting cavity of the base. This design allows for positional adjustment of the base relative to the push rod, enabling the adjustment of the distance between the push rod and the elevator drum brake coil end cover according to different working conditions and needs, thereby achieving precise control of braking and release. A slider is movably positioned within the mounting cavity, with a through hole communicating with the cavity for the push rod to pass through. In its natural state, a retainer keeps the slider abutting the push rod; under external force, the slider disengages from the push rod. This retainer controls the connection between the slider and the push rod, allowing the push rod to function normally when brake release is needed, and maintaining a stable state when brake release is not required. Because the base slides along the push rod, the working distance of the brake release device within the brake can be quickly adjusted, improving inspection efficiency. Attached Figure Description

[0019] 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.

[0020] Figure 1 A schematic diagram of an embodiment of the brake release device provided by this utility model;

[0021] Figure 2 for Figure 1 A magnified view of a section at point A in the middle;

[0022] Figure 3 for Figure 1 Sectional view at point AA;

[0023] Figure 4 for Figure 1 A cross-sectional view of point AA in another state;

[0024] Figure 5 This is a schematic diagram of one embodiment of the slider;

[0025] Figure 6 This is a rear view of the base.

[0026] Explanation of icon numbers:

[0027] 100. Brake release device;

[0028] 1. Lever assembly; 11. First lever; 111. Base; 112. Mounting cavity; 113. Sliding channel; 12. Second lever; 121. Pressing part;

[0029] 2. Push rod; 21. Screw;

[0030] 3. Locking assembly; 31. Slider; 311. Through hole; 3111. Strip groove; 3112. Mounting groove; 312. Tooth insert; 313. Button part; 314. Protrusion; 32. Retaining member; 321. Elastic member;

[0031] 4. Lever arm assembly; 41. First wall; 42. Second arm.

[0032] 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

[0033] 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.

[0034] 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.

[0035] 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 includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. 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.

[0036] The brake is a crucial safety component of an elevator. Its failure can lead to serious consequences such as the car bottoming out, overshooting, or operating with the doors open. Therefore, in addition to electrical braking, the elevator braking system should also include a mechatronic friction brake, which combines the functions of parking and traveling brakes. The main types of elevator brakes are drum brakes and disc brakes. Drum brakes, due to their simple structure and lower cost, are widely used in asynchronous motor traction machines and a significant portion of synchronous motor traction machines, including the vast majority of freight elevators and a considerable number of passenger elevators.

[0037] To check the braking capacity of a single brake set, a manual release wrench that can open another brake set is needed. Existing manual release wrenches for drum brakes primarily use a screw-type adjustment mechanism. However, this design has the following drawbacks: In elevators, due to differences in brand, model, and specifications, the distance between the brake arm and the coil end cover varies. To accommodate brakes with different distances, the adjusting screw needs to be rotated to change the distance. When the distance difference between different brakes is significant, rotating the adjusting screw takes a considerable amount of time, significantly impacting inspection efficiency.

[0038] To solve the above technical problems, such as Figure 1 and Figure 2As shown, this utility model proposes a brake release device 100 for use in an elevator drum brake, including a lever assembly 1, a push rod 2, and a locking assembly 3. The lever assembly 1 includes a first lever 11 and a second lever 12 hinged to each other. The top end of the first lever 11 forms a base 111, and the top end of the second lever 12 forms a pressing part 121, which is used to press against the brake arm of the elevator drum brake. The base 111 has an installation cavity 112 opening along a first direction inside. The push rod 2 extends along the first direction. The base 111 is positioned and movably inserted into the mounting cavity 112 so that the position of the base 111 relative to the top rod 2 is adjustable. The top rod 2 is used to press against the coil end cover of the elevator drum brake. The locking assembly 3 includes a slider 31 and a retainer 32. The slider 31 is movably disposed in the mounting cavity 112, and the inside of the slider 31 is provided with a through hole 311 communicating with the mounting cavity 112 for the top rod 2 to pass through. The retainer 32 is used to make the slider 31 abut against the top rod 2 in the natural state, and to make the slider 31 disengage from the top rod 2 under the action of external force.

[0039] The technical solution of this utility model utilizes a first lever 11 and a second lever 12 that are hinged together, with a base 111 at the top of the first lever 11 and a pressing part 121 at the top of the second lever 12. This cleverly leverages the flexibility of the hinge structure, allowing the pressing part 121 to easily press against the brake arm of the elevator drum brake, thus enabling operation of the brake arm. Simultaneously, the mounting cavity 112 inside the base 111 provides space and guidance for the movement of the push rod 2, ensuring the stability of the entire lever assembly 1. The push rod 2, extending along a first direction, movably passes through the mounting cavity 112 of the base 111. This design allows the base 111 to be adjusted relative to the push rod 2, thereby adjusting the distance between the push rod 2 and the elevator drum brake coil end cover according to different working conditions and needs, achieving precise control of braking and release. The slider 31 is movably disposed within the mounting cavity 112, and a through hole 311 communicating with the mounting cavity 112 is provided inside for the push rod 2 to pass through. The retaining member 32 keeps the slider 31 in contact with the push rod 2 in its natural state, and disengages the slider 31 from the push rod 2 under external force. The retaining member 32 controls the connection state between the slider 31 and the push rod 2, thus releasing the slider 31 from the push rod 2 when brake release is needed, allowing the push rod 2 to work normally, and maintaining a stable state when brake release is not required. Since the base 111 slides along the push rod 2, the working distance of the brake release device 100 in the brake can be quickly adjusted, improving inspection efficiency.

[0040] It is understandable that, such as Figure 3 and Figure 4As shown, the slider 31 presses against the push rod 2 to prevent relative movement between the push rod 2 and the base 111, thus ensuring the stability of the brake release. To this end, in one embodiment, a toothed insert 312 is provided inside the through hole 311. The toothed insert 312 abuts against the push rod 2 under the action of the retaining member 32. This arrangement increases the contact area and friction between the toothed insert 312 and the push rod 2, effectively reducing the possibility of the push rod 2 moving freely on the base 111. This allows the push rod 2 to maintain a relatively stable position during brake release, thereby ensuring the accuracy and reliability of the brake release action.

[0041] In one embodiment, the through hole 311 includes a strip groove 3111 extending in the second direction, within which the push rod 2 can slide. This arrangement provides a specific path for the sliding of the push rod 2, allowing it to move smoothly in the second direction and disengage from the slider 31, thereby enabling relative displacement between the base 111 and the push rod 2.

[0042] It is understood that the insert tooth 312 is disposed inside the through hole 311 to abut against the top rod 2. However, to improve the stability of the insert tooth 312 installation, in one embodiment, the through hole 311 further includes a mounting groove 3112, which communicates with the strip groove 3111, and the insert tooth 312 is disposed within the mounting groove 3112. This arrangement provides a dedicated installation position for the insert tooth 312 by providing the mounting groove 3112 within the through hole 311, allowing the insert tooth 312 to be more securely fixed within the through hole 311. The presence of the mounting groove 3112 increases the contact area and connection strength between the insert tooth 312 and the wall of the through hole 311, reducing the possibility of loosening or displacement of the insert tooth 312 during operation, thereby improving the stability of the insert tooth 312 installation. In addition, the mounting groove 3112 is connected to the strip groove 3111, which not only ensures that the insert tooth 312 can smoothly abut against the top rod 2, but also makes the installation and maintenance of the insert tooth 312 more convenient through the separate setting of the mounting groove 3112.

[0043] It is understandable that the above-mentioned technical solution allows for rapid adjustment through relative movement between the base 111 and the push rod 2; however, the adjustment accuracy is low, which is not conducive to achieving precise adjustment. In one embodiment, the push rod 2 includes a screw 21, which can engage with the insert teeth 312. This configuration provides a new way to adjust the movement and lifting of the base 111 relative to the push rod 2 through the engagement of the screw 21 and the insert teeth 312. By rotating the screw 21, rotational motion can be converted into linear motion, and the precise engagement of the insert teeth 312 allows for more accurate adjustment and control of this linear motion. This, combined with rapid adjustment, achieves high-precision adjustment to meet the needs of different working conditions.

[0044] It is understandable that during the rotation of the screw 21, one end will abut against the coil end cover of the elevator drum brake and rotate. During this process, a planar end would increase the friction area. Therefore, in one embodiment, the end of the screw 21 that abuts against the coil end cover of the elevator drum brake is designed with a pointed angle. This design reduces the contact area when abutting against the coil end cover, lowers friction, and makes the screw 21 rotate more smoothly. It reduces the increase in rotational resistance or jamming caused by excessive friction, improving the overall system efficiency. Furthermore, the pointed angle design allows for more precise positioning and application to the coil end cover, facilitating accurate adjustment of the braking torque of the elevator drum brake. This avoids the problem of low adjustment accuracy caused by an excessively large contact area, thus better meeting the requirements of the elevator braking system for braking torque adjustment under different operating conditions. The shape of the pointed angle can be triangular, trapezoidal, or conical, and the specific shape is determined according to the actual application requirements to ensure optimal contact effect and adjustment accuracy.

[0045] It is understandable that the function of the retainer 32 is to fix the relative position of the screw 21 and the insert tooth 312, preventing relative displacement during operation. Therefore, the retainer 32 can be a retaining ring. The retaining ring can tightly fit at the connection between the screw 21 and the insert tooth 312, providing a reliable fixing force to ensure that they will not undergo relative displacement due to vibration, impact, or other factors during operation, thereby ensuring the stability and reliability of the entire system. Alternatively, the retainer 32 can also be a fastening bolt. The fastening bolt fixes their relative position by tightening it at the relevant parts of the screw 21 and the insert tooth 312, using the bolt's tightening force to prevent relative displacement. However, the retaining ring and fastening bolt cannot automatically reset after adjustment, requiring manual adjustment and reset, increasing operational complexity and time costs. Therefore, in one embodiment, the retainer 32 includes an elastic element 321, which is disposed between the slider 31 and the mounting cavity 112 to provide elastic force to make the slider 31 abut against the push rod 2. With this configuration, when an elastic element 321 is placed between the slider 31 and the mounting cavity 112, the elastic element 321 can automatically provide elastic force to keep the slider 31 and the push rod 2 in contact, depending on the system's operating state and changes in external factors. Under any circumstances, if the system is subjected to vibration, impact, or other minor changes, the elastic element 321 can react promptly, adjusting the position of the slider 31 through its own elastic deformation to ensure a tight fit with the push rod 2. This automatic adjustment function avoids the hassle of manual adjustment and resetting of retaining rings and fastening bolts, greatly reducing operational complexity and time costs. For example, during continuous operation, even if the relative position of the slider 31 and the push rod 2 is temporarily offset due to external interference, the elastic element 321 can quickly recover its elastic force, pushing the slider 31 back to the correct position and ensuring the normal operation of the system. Moreover, the elasticity of the elastic element 321 can be designed and adjusted according to specific working requirements to meet the different system's requirements for elastic force magnitude and stability, thereby further improving the system's adaptability and reliability.

[0046] like Figure 5 and Figure 6As shown, in one embodiment, the mounting cavity 112 has a sliding channel 113 in the second direction, and the slider 31 has a button portion 313 protruding outward from the sliding channel 113, which can slide within the sliding channel 113. This configuration, by opening the sliding channel 113 in the mounting cavity 112 and having the slider 31 have a corresponding protruding button portion 313 that can slide within the sliding channel 113, achieves precise guidance and restriction of the slider 31's movement. This allows the slider 31 to slide smoothly along a specific direction (the second direction), reducing the possibility of deviation or wobbling during movement, thereby ensuring stability in contact with the push rod 2. Furthermore, the button portion 313 provides the user with an intuitive operating interface. The user can control the position of the slider 31 within the sliding channel 113 by pressing or sliding the button portion 313, switching the slider 31 and push rod 2 between contact and separation states, thus facilitating user operation. It is worth noting that the elastic element 321 ensures that the slider 31 abuts against the push rod 2, guaranteeing tight contact between the two. Therefore, the elastic element 321 can be made of springs, sheet metal, or other materials with similar elasticity, and its elastic force and shape can be customized according to actual needs.

[0047] In one embodiment, the slider 31 has a protrusion 314 on one side in the third direction, and the elastic member 321 is arranged along the second direction, with one end abutting against the protrusion 314 and the other end abutting against the inner wall of the mounting cavity 112. This arrangement provides a reliable contact point for the elastic member 321 through the protrusion 314, allowing the force of the elastic member 321 to be accurately transmitted to the slider 31. This helps maintain the stability of the slider 31 during operation and reduces the possibility of it shifting or wobbling due to external forces or other factors. The elastic member 321 is arranged along the second direction, which is adapted to the movement of the slider 31 in that direction, allowing it to better exert its elastic effect and ensuring close contact and fixed relative position between the slider 31 and related components.

[0048] In one embodiment, the brake release device 100 further includes a lever assembly 4, which comprises a first arm 41 and a second arm 42 hinged together. The top end of the first arm is hinged to the bottom end of the second lever 12, and the top end of the second arm 42 is hinged to the bottom end of the first lever 11. This arrangement, through the hinges between the first arm and the bottom end of the second lever 12, and between the second arm 42 and the bottom end of the first lever 11, forms a relatively stable and continuous force transmission link. Force can be input from the outside and transmitted through the lever assembly 4, accurately acting on the first lever 11 and the second lever 12, enabling the brake release action to be performed efficiently. This force transmission method is more direct and reliable, reducing force loss and deviation during transmission, and improving the response speed and accuracy of the brake release device 100.

[0049] 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 brake release device for use in an elevator drum brake, characterized in that, include: The lever assembly includes a first lever and a second lever that are hinged to each other. The top end of the first lever has a base, and the top end of the second lever has a pressing part. The pressing part is used to press against the brake arm of the elevator drum brake. The base has an installation cavity that is opened along a first direction. A push rod extends along a first direction and is movably inserted through the mounting cavity so that the position of the base relative to the push rod is adjustable. The push rod is used to press against the coil end cover of the elevator drum brake. as well as, The locking assembly includes a slider and a retainer. The slider is movably disposed within the mounting cavity, and the slider has a through hole communicating with the mounting cavity for the push rod to pass through. The retainer is used to allow the slider to abut against the push rod in its natural state, and to disengage the slider from the push rod under the action of an external force.

2. The brake release device as described in claim 1, characterized in that, The through hole is provided with insert teeth, which abut against the top rod under the action of the retainer.

3. The brake release device as described in claim 1 or 2, characterized in that, The through hole includes a strip-shaped groove extending in a second direction, within which the push rod can slide.

4. The brake release device as described in claim 1, characterized in that, The through hole also includes a mounting groove, which communicates with the strip groove, and the insert tooth is disposed in the mounting groove.

5. The brake release device as described in claim 2, characterized in that, The push rod includes a screw rod that can engage with the insert teeth.

6. The brake release device as described in claim 5, characterized in that, The end of the screw that abuts against the coil end cap of the elevator drum brake is set at a sharp angle.

7. The brake release device as described in claim 1, characterized in that, The retaining member includes an elastic element disposed between the slider and the mounting cavity to provide elastic force to abut the slider against the push rod.

8. The brake release device as described in claim 7, characterized in that, The mounting cavity has a sliding channel in the second direction, and the slider has a button protruding outward from the sliding channel, and the button can slide within the sliding channel.

9. The brake release device as described in claim 7, characterized in that, The slider has a protrusion on one side in the third direction, and the elastic element is arranged along the second direction, with one end abutting against the protrusion and the other end abutting against the inner wall of the mounting cavity.

10. The brake release device as described in claim 1, characterized in that, The brake release device further includes a lever assembly, which includes a first wall and a second arm that are hinged to each other. The top end of the first arm is hinged to the bottom end of the second lever, and the top end of the second arm is hinged to the bottom end of the first lever.

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