Manual power-assisted unlocking device of electromagnetic brake

Abstract

The utility model relates to the technical field of electromagnetic brakes, and discloses a manual power-assisted unlocking device of an electromagnetic brake, which comprises an electromagnetic brake body, a handle bottom draw hook and an actuating mechanism, an action mechanism is arranged at the lower end of the electromagnetic brake body and comprises a lantern ring and a screw rod, sliding grooves are formed in the middles of the upper end and the lower end of the lantern ring, through holes are formed in the inner walls of one sides of the sliding grooves, and a screw hole plate is fixedly connected to the lower end of the outer wall of one side of the electromagnetic brake body; and a groove is formed in the lower end of the outer wall of one side of the screw hole plate. According to the utility model, the operating rocking handle in the actuating mechanism drives the screw rod to rotate, and the screw rod is in threaded connection with the screw hole plate, so that the screw rod axially moves along the groove, the lantern ring is driven to pull the lever handle to release the braking force, and the screw rod is locked in cooperation with the tightening nut, so that the operation is simple, and more labor is saved.

Description

Technical Field

[0001] This utility model relates to the field of electromagnetic brake technology, and in particular to a manual-assisted unlocking device for an electromagnetic brake. Background Technology

[0002] Electromagnetic brakes are ideal automated actuators in modern industry. In mechanical transmission systems, they transmit torque from the active side to the passive side, primarily functioning to transmit power and control motion. They can be freely engaged, disengaged, or braked as needed. They offer advantages such as compact structure, simple operation, sensitive response, long lifespan, reliable use, and ease of remote control. They are widely used in machinery in metallurgy, construction, chemical, food processing, machine tools, stage equipment, elevators, ships, and packaging, as well as in applications requiring braking during power outages (as a safety precaution). However, due to the complex working environment of electromagnetic brakes, braking components are prone to damage, often resulting in malfunctions such as slow or erratic brake action, typically caused by mechanical or electrical faults.

[0003] However, current manual unlocking devices for electromagnetic brakes generally employ the lever principle. A lever is attached to the armature housing, with the short lever arm pressing against the friction plate and the long lever arm serving as a handle. Moving the unlocking handle separates the armature from the friction plate, allowing for manual release of the brake. Taking an electromagnetic brake with a braking torque of 300 N·m as an example, its friction coefficient is 0.35–0.65, and the friction disc diameter is 0.2 m. Therefore, the frictional force is F = 1500 N. Based on the frictional force calculation formula F = μ·Fn, the normal force Fn of the friction disc is calculated to be 2307–4285 N. Since the lever arm ratio is 1:10, the force required to pull the lever is approximately 230.7–428.5 N, equivalent to lifting a 23–42 kg weight. It is evident that manual unlocking requires considerable force and is difficult to maintain for extended periods. Therefore, in cases of electrical faults or emergencies, a convenient, labor-saving, and highly reliable manual unlocking device is needed to release the brake.

[0004] Therefore, those skilled in the art have provided a manual-assisted unlocking device for an electromagnetic brake to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a manual-assisted unlocking device for an electromagnetic brake. The device uses an operating handle in the action mechanism to drive the screw to rotate. The screw is threadedly connected to the screw hole plate, causing the screw to move axially along the groove. This drives the collar to pull the lever handle to release the braking force. The screw is then locked in place by tightening the nut. The device is simple to operate and requires less effort.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A manual-assisted unlocking device for an electromagnetic brake includes an electromagnetic brake body, a bottom hook of a handle, and an actuating mechanism. A lever handle is hinged to the middle of the outer wall of both the front and rear ends of the electromagnetic brake body. An actuating mechanism is provided at the lower end of the electromagnetic brake body. The actuating mechanism includes a collar and a screw. A groove is formed in the middle of the upper and lower ends of the collar. A through hole is formed on the inner wall of one side of the groove. A screw hole plate is fixedly connected to the lower end of one side of the outer wall of the electromagnetic brake body. A groove is formed at the lower end of one side of the outer wall of the screw hole plate. A nut is placed inside the groove and threadedly connected to the screw. The middle of the outer wall of the screw is threadedly connected to the screw hole plate. An operating handle is fixedly connected to the rear end of the screw.

[0008] The above technical solution involves rotating a crank handle to drive a screw fixedly connected to it. The screw is threadedly connected to a screw hole plate fixedly connected to the electromagnetic brake body, causing the screw to move axially along the threaded hole. This causes the collar to move closer to the screw hole plate, and the lever handle is pulled by the hook at the bottom of the handle to release the braking force. The nut threadedly connected to the screw is then tightened to lock the screw in place. When the fault is cleared, the nut can be loosened, and the crank handle can be rotated in the opposite direction to move the collar away from the screw hole plate, thus restoring the braking force.

[0009] Furthermore, the middle part of the lower end of the lever handle is fixedly connected to the bottom hook of the handle, and the lower end of the bottom hook of the handle passes through the groove to the outside of the collar;

[0010] The above technical solution allows the lower end of the bottom hook of the handle to pass through the groove to the outside of the collar, so that the bottom hook of the handle can hook the collar, and then the lever handle is fixedly connected to the bottom hook of the handle, so that the movement of the collar can drive the lever handle to move through the bottom hook of the handle.

[0011] Furthermore, the inner wall on the other side of the slide is provided with a cylindrical surface, which is slidably connected to the bottom hook of the handle;

[0012] By using the above technical solution, a cylindrical surface is provided on the inner wall of the other side of the slide groove, and the cylindrical surface is slidably connected to the bottom hook of the handle. This ensures that the contact surface remains stable during the movement of the ring.

[0013] Furthermore, one side of the through hole extends to the outer wall of one side of the collar, and the diameter of the groove is larger than the diameter of the nut;

[0014] The above technical solution allows the screw to pass through the through hole and into the groove on the collar by extending one side of the through hole to the outer wall of the collar. The diameter of the groove is larger than the diameter of the nut, so that the nut can move in and out of the groove normally as the screw moves.

[0015] Furthermore, the front end of the screw passes through the through hole into the interior of the slide groove and is fixedly connected with a shoulder, the diameter of which is larger than the diameter of the through hole;

[0016] By using the above technical solution, by making the diameter of the fixed shoulder on the screw larger than the diameter of the through hole, when the screw approaches the screw hole plate, the shoulder restricts the movement of the collar as the screw rotates, which in turn drives the lever handle to move via the hook at the bottom of the handle.

[0017] Furthermore, the operating handle includes, but is not limited to, a manual handle and a motor-driven handle;

[0018] The above technical solution allows operators to easily crank the screw by fixing a crank handle to the screw, making operation easier and less strenuous. The crank handle can be either manual or electric.

[0019] This utility model has the following beneficial effects:

[0020] 1. This utility model proposes a manual-assisted unlocking device for an electromagnetic brake. The operating handle in the actuating mechanism drives a screw fixedly connected to it to rotate. The screw is threadedly connected to a screw hole plate fixedly connected to the electromagnetic brake body, causing the screw to move axially along the threaded hole. This drives the collar to approach the screw hole plate, and the lever handle is pulled by the hook at the bottom of the handle to release the braking force. Tightening the nut threadedly connected to the screw locks it in place. When the fault is cleared, the nut can be loosened, and the operating handle can be rotated in the opposite direction to move the collar away from the screw hole plate, thus restoring the braking force. This device is simple to operate, requires less effort, has a self-locking function, and is highly stable. Furthermore, the mechanism is simple and inexpensive. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the main structure of a manual-assisted unlocking device for an electromagnetic brake proposed in this utility model;

[0022] Figure 2 An isometric view of the electromagnetic brake body, lever handle, and screw hole plate of a manual-assisted unlocking device for an electromagnetic brake proposed in this utility model.

[0023] Figure 3 An isometric view of the collar of a manual-assisted unlocking device for an electromagnetic brake proposed in this utility model.

[0024] Figure 4 for Figure 1 Enlarged view of point A in the middle;

[0025] Figure 5 for Figure 2Enlarged view of point B in the middle.

[0026] Legend:

[0027] 1. Electromagnetic brake body; 2. Lever handle; 3. Handle bottom hook; 4. Actuating mechanism; 401. Collar; 402. Slide groove; 403. Cylindrical surface; 404. Through hole; 405. Screw hole plate; 406. Groove; 407. Nut; 408. Screw; 409. Shoulder; 410. Operating crank. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of specific embodiments. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Reference Figure 1-5 This utility model provides a specific embodiment: a manual-assisted unlocking device for an electromagnetic brake, comprising an electromagnetic brake body 1, a handle bottom hook 3, and an actuation mechanism 4. A lever handle 2 is hinged to the middle of the outer wall of both the front and rear ends of the electromagnetic brake body 1. An actuation mechanism 4 is provided at the lower end of the electromagnetic brake body 1. The actuation mechanism 4 includes a collar 401 and a screw 408. A groove 402 is provided at the middle of both the upper and lower ends of the collar 401. A through hole 404 is provided on the inner wall of one side of the groove 402. A screw hole plate 405 is fixedly connected to the lower end of one side of the outer wall of the electromagnetic brake body 1. A groove 406 is provided at the lower end of one side of the outer wall of the screw hole plate 405. A nut 407 is provided inside the groove 406. The nut 407 is threadedly connected to the screw 408. The middle of the outer wall of the screw 408 is threadedly connected to the screw hole plate 405. An operating handle 410 is fixedly connected to the rear end of the screw 408.

[0030] The operating handle 410 in the action mechanism 4 drives the screw 408, which is fixedly connected to it, to rotate. The screw 408 is threadedly connected to the screw hole plate 405 fixedly connected to the electromagnetic brake body 1, so that the screw 408 moves axially along the threaded hole, causing the collar 401 to move closer to the screw hole plate 405. The lever handle 2 is then pulled by the pull hook 3 at the bottom of the handle to release the braking force. The nut 407, which is threadedly connected to the screw 408, is tightened to lock the screw 408. When the fault is cleared, the nut 407 can be loosened and the operating handle 410 can be rotated in the opposite direction to move the collar 401 away from the screw hole plate 405, thereby restoring the braking force. This makes the operation simple, less strenuous, and has a self-locking function, high stability. In addition, the mechanism is simple and low in cost.

[0031] The lower middle part of the lever handle 2 is fixedly connected to the bottom hook 3 of the handle. The lower end of the bottom hook 3 passes through the slide groove 402 to the outside of the collar 401. By allowing the lower end of the bottom hook 3 to pass through the slide groove 402 to the outside of the collar 401, the bottom hook 3 can hook the collar 401, thereby coordinating the fixed connection between the lever handle 2 and the bottom hook 3. This allows the movement of the collar 401 to drive the lever handle 2 through the bottom hook 3. A cylindrical surface 403 is provided on the inner wall of the other side of the slide groove 402. The cylindrical surface 403 is slidably connected to the bottom hook 3 of the handle. By setting the cylindrical surface 403 on the inner wall of the other side of the groove 402 and allowing the cylindrical surface 403 to be slidably connected to the bottom hook 3 of the handle, a good fit can be maintained with the bottom hook 3 of the handle, ensuring that the contact surface remains stable during the movement of the collar 401. One side of the through hole 404 extends to the outer wall of one side of the collar 401. The diameter of the groove 406 is larger than the diameter of the nut 407. By allowing one side of the through hole 404 to extend to the outer wall of the collar 401, the screw 40... The screw 408 can penetrate through the through hole 404 into the groove 402 on the collar 401, and the diameter of the groove 406 is larger than the diameter of the nut 407, so that the nut 407 can move normally in and out of the groove 406 as the screw 408 moves. The front end of the screw 408 penetrates through the through hole 404 into the groove 402 and is fixedly connected to a shoulder 409. The diameter of the shoulder 409 is larger than the diameter of the through hole 404. By making the diameter of the shoulder 409 fixedly connected to the screw 408 larger than the diameter of the through hole 404, the screw 408 can move in and out of the groove 406 as the screw 408 moves. When the orifice plate 405 approaches, the shoulder 409 restricts the movement of the collar 401 as the screw 408 rotates, which in turn drives the lever handle 2 to move via the bottom hook 3 of the handle. The operating handle 410 includes, but is not limited to, a manual handle and a motor-driven handle. The operating handle 410, which is fixedly connected to the screw 408, makes it convenient for the operator to crank the screw 408 and makes the operation more labor-saving. The form of the operating handle 410 is not fixed; it can be manual or electric.

[0032] Working principle: When using the manual assisted unlocking device of this electromagnetic brake, the operator can first operate the crank handle 410 to rotate the screw 408 fixedly connected to it during troubleshooting. The screw 408 is threadedly connected to the screw hole plate 405 fixedly connected to the electromagnetic brake body 1, causing the screw 408 to move axially along the threaded hole, driving the collar 401 to move closer to the screw hole plate 405. The lever handle 2 is then pulled by the pull hook 3 at the bottom of the handle to release the braking force. Finally, the nut 407 threadedly connected to the screw 408 is tightened to lock the screw 408. After troubleshooting, the nut 407 can be loosened and the crank handle 410 can be rotated in the opposite direction to move the collar 401 away from the screw hole plate 405, thereby restoring the braking force.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing specific embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A manually assisted unlocking device for an electromagnetic brake, comprising an electromagnetic brake body (1), a handle bottom pull hook (3) and an action mechanism (4), characterized in that: The lever handle (2) is fixedly connected to the middle part of the lower end of the electromagnetic brake body (1), and the lower end of the electromagnetic brake body (1) is provided with an action mechanism (4), the action mechanism (4) comprises a sleeve ring (401) and a screw rod (408), the middle part of the upper end and the lower end of the sleeve ring (401) is provided with a sliding groove (402), the inner wall of one side of the sliding groove (402) is provided with a through hole (404), the lower end of the outer wall of one side of the electromagnetic brake body (1) is fixedly connected with a threaded hole plate (405), the lower end of the outer wall of one side of the threaded hole plate (405) is provided with a groove (406), the inside of the groove (406) is provided with a nut (407), the nut (407) is in threaded connection with the screw rod (408), the middle part of the outer wall of the rod body of the screw rod (408) is in threaded connection with the threaded hole plate (405), and the rear end of the screw rod (408) is fixedly connected with an operation crank (410).

2. A manually assisted release device for an electromagnetic brake according to claim 1, characterised in that: The middle part of the lower end of the lever handle (2) is fixedly connected with a handle bottom draw hook (3), and the lower end of the handle bottom draw hook (3) penetrates through the sliding groove (402) to the outside of the sleeve ring (401).

3. A manually assisted release device for an electromagnetic brake according to claim 1, wherein: The inner wall of the other side of the sliding groove (402) is provided with a cylindrical surface (403), and the cylindrical surface (403) is in sliding connection with the handle bottom draw hook (3).

4. A manually assisted release device for an electromagnetic brake according to claim 1, wherein: One side of the through hole (404) penetrates to the outer wall of one side of the sleeve ring (401), and the diameter of the groove (406) is greater than that of the nut (407).

5. A manually assisted release device for an electromagnetic brake according to claim 1, wherein: The front end of the screw rod (408) penetrates through the through hole (404) to the inside of the sliding groove (402) and is fixedly connected with an shaft shoulder (409), and the diameter of the shaft shoulder (409) is greater than that of the through hole (404).

6. A manually assisted release device for an electromagnetic brake according to claim 1, wherein: The operation crank (410) comprises but is not limited to a manual crank and a motor-driven crank.

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