Electric failure safety type executing device for braking monorail crane

Abstract

The invention provides an electric fail-safe execution device for braking a monorail crane, which comprises two opposite electric cylinders, an actuating mechanism, a braking mechanism, a braking mechanism, a braking mechanism, a braking mechanism and a braking mechanism, and is characterized in that the output end of each electric cylinder is horizontally arranged; the first connecting lug is arranged at the neck part of the electric cylinder; the brake sleeve is arranged on the outer side of the electric cylinder in a sleeving mode and is in sliding connection with the outer surface of the electric cylinder, and the side, close to the output end of the electric cylinder, of the brake sleeve is closed and connected to a brake shoe; the second connecting lug is arranged on the peripheral side of the closed end of the brake sleeve; the brake spring is arranged between the first connecting lug and the second connecting lug; and the failure safety mechanism is arranged between the output end of the electric cylinder and the closed end of the brake sleeve and enables the second connecting lug to be located at a brake position or an idle position. The monorail crane locomotive can not be provided with a hydraulic station any more, hydraulic systems are reduced, the failure rate of the monorail crane can be effectively reduced, the reliability of the locomotive is improved, and the monorail crane locomotive is suitable for the underground coal mine environment with the anti-explosion requirement.

Description

Technical Field

[0001] This invention belongs to the technical field of mine machinery safety equipment, and in particular relates to an electric fail-safe actuator for braking monorail cranes. Background Technology

[0002] Traditional monorail cranes use battery-powered motors and hydraulic cylinders for braking systems, which have the following drawbacks: 1. Electrical energy is converted into high-pressure hydraulic oil to drive the brake cylinder, resulting in low energy conversion efficiency and high energy loss.

[0003] 2. Hydraulic braking relies on a hydraulic station and a quick return valve, which poses a risk of oil leakage and contamination. In addition, the hydraulic station requires additional explosion-proof treatment downhole.

[0004] 3. The hydraulic system has high maintenance requirements and a high failure rate under harsh underground working conditions. Summary of the Invention

[0005] One object of the present invention is to provide an electrically operated fail-safe actuator for braking a monorail crane locomotive, and to provide at least the advantages described below.

[0006] This invention provides an electric fail-safe actuator for braking monorail locomotives. The monorail locomotive no longer needs to be equipped with a hydraulic station. By reducing the hydraulic system, the failure rate of the monorail locomotive can be effectively reduced, and the reliability of the locomotive can be improved. It is suitable for underground coal mine environments with explosion-proof requirements.

[0007] The technical solution of the present invention is as follows: An electrically operated fail-safe actuator for braking monorail cranes, comprising two oppositely arranged devices, includes: The electric cylinder has its output end set horizontally. A first connecting lug is disposed at the neck of the electric cylinder; A brake sleeve is fitted on the outside of the electric cylinder and slidably connected to the outer surface of the electric cylinder, and is closed and connected to the brake shoe on the side near the output end of the electric cylinder. The second connecting lug is disposed on the outer periphery of the closed end of the brake sleeve; A braking spring is disposed between the first connecting lug and the second connecting lug; And a fail-safe mechanism, which is disposed between the output end of the electric cylinder and the closed end of the brake sleeve and such that the second connecting lug is in the brake position or the idle position.

[0008] Preferably, in the electric fail-safe actuator for braking a monorail crane, the fail-safe mechanism includes: At least two movable hooks are hinged within the brake sleeve, and each movable hook includes a first limiting block near the closed end, a second limiting block near the output end of the electric cylinder, and a third limiting block located between the first limiting block and the second limiting block. The hinge point of the movable hook is located near the third limiting block. A limiting retaining ring is disposed at the head end of the output end of the electric cylinder; An electromagnet is disposed inside the closed end of the brake sleeve; And a movable soft iron, which is set on the side of the third limiting block near the second limiting block by a tension spring; in; When the tension spring is in its natural state, the movable soft iron and the electromagnet are not in contact. The outer diameter of the limiting ring is larger than the inner diameter of the shape formed by the second limiting block.

[0009] Preferably, in the electric fail-safe actuator for braking monorail cranes, The limiting ring is frustoconical and matches the shape of the third limiting block; The movable soft iron is truncated cone-shaped on the side closest to the electromagnet, and cylindrical on the side closest to the card spring, abutting against the inner side of the first limiting block.

[0010] The present invention has the following beneficial effects: It can replace the original hydraulic cylinders and hydraulic stations, reducing locomotive components and lowering the locomotive failure rate.

[0011] Its shape is similar to that of a hydraulic brake cylinder, and it can be directly replaced.

[0012] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0013] Figure 1 A schematic diagram of one embodiment of an electrically operated fail-safe actuator for braking a monorail locomotive provided for the invention; Figure 2 A partial structural schematic diagram of one embodiment of an electric fail-safe actuator for braking a monorail crane locomotive provided for the invention; Figure 3 A schematic diagram of a failure state in one embodiment of an electrically operated fail-safe actuator for braking a monorail crane provided for the invention. Detailed Implementation

[0014] The present invention will be further described in detail below with reference to embodiments, so that those skilled in the art can implement it based on the description.

[0015] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not imply the presence or addition of one or more other elements or combinations thereof.

[0016] This invention primarily addresses the problems existing in the hydraulic braking system of monorail cranes in underground coal mines. Traditional monorail crane braking systems use hydraulic cylinders, requiring the locomotive to be equipped with a hydraulic power station. This system is complex, with bulky and heavy components such as pump stations, oil tanks, pipelines, and valve groups, increasing the weight of the monorail crane. Furthermore, space constraints make maintenance inconvenient; hydraulic oil leaks pose a risk of environmental pollution. By adopting an electric actuator, the original hydraulic cylinders and hydraulic power station can be replaced, reducing locomotive components and lowering the locomotive failure rate.

[0017] like Figure 1 As shown, the present invention provides an electrically operated fail-safe actuator for braking a monorail crane locomotive, comprising two oppositely arranged devices, each including: Electric cylinder 1, its output end is set horizontally; A first connecting ear 2 is disposed at the neck of the electric cylinder 1; Brake sleeve 3 is sleeved on the outside of electric cylinder 1 and slidably connected to the outer surface of electric cylinder 1, and is closed and connected to brake shoe on the side near the output end of electric cylinder 1. The second connecting ear 4 is disposed on the outer periphery of the closed end of the brake sleeve 3; A braking spring 5 is disposed between the first connecting lug 2 and the second connecting lug 4; And fail-safe mechanism 6, which is disposed between the output end of the electric cylinder 1 and the closed end of the brake sleeve 3 and such that the second connecting lug 4 is in the brake position or the idle position.

[0018] This invention is similar in appearance to a hydraulic brake cylinder and can be directly replaced. The electric cylinder and the fail-safe mechanism are connected together via a brake sleeve, and both are equipped with connecting ears for easy installation. It can directly replace the hydraulic brake cylinder. When the brake spring is at its maximum compression state, the distance between the first and second connecting ears is at its minimum. At this time, the corresponding monorail is in the brake open state. The screw of the electric cylinder retracts, the fail-safe mechanism activates, and the brake is properly opened.

[0019] like Figure 2 As shown, in one embodiment of the electrically operated fail-safe actuator for braking a monorail crane provided by the present invention, the fail-safe mechanism 6 includes: At least two movable hooks 61 are hinged within the brake sleeve 3, and each movable hook 61 includes a first limiting block 611 near the closed end, a second limiting block 612 near the output end of the electric cylinder 1, and a third limiting block 613 located between the first limiting block 611 and the second limiting block 612. The hinge point of the movable hook 61 is located near the third limiting block 613. A limiting retaining ring 62 is disposed at the head end of the output end of the electric cylinder 1; Electromagnet 63 is disposed inside the closed end of the brake sleeve 3; And movable soft iron 64, which is provided by tension spring 65 on the side of the third limiting block 613 near the second limiting block 612; in; When the tension spring 65 is in its natural state, the movable soft iron 64 and the electromagnet 63 are not in contact. The outer diameter of the limiting ring 62 is larger than the inner diameter of the shape enclosed by the second limiting block 612.

[0020] In one embodiment of the electrically operated fail-safe actuator for braking a monorail crane provided by the present invention, in the electrically operated fail-safe actuator for braking a monorail crane, The limiting ring 62 is frustoconical and matches the shape of the third limiting block 613; The movable soft iron 64 is truncated cone-shaped on the side near the electromagnet 63, and cylindrical on the side near the tension spring 65, abutting against the inner side of the first limiting block 611.

[0021] When the monorail crane needs to brake, the electromagnet 63 inside the fail-safe mechanism 6 is de-energized, and the movable soft iron 64 loses the attraction of the electromagnet 63. Under the action of the tension spring 65, it moves to the left. At the same time, the first limit block 611 slides inward, the third limit block 613 rotates, and the output end of the electric cylinder 1 separates from the third limit block 613, causing the electric cylinder 1 to disengage from the fail-safe mechanism 6. Under the action of the braking spring 5, the distance between the first connecting ear 2 and the second connecting ear 4 increases, and the force of the braking spring 5 is applied to the brake shoes of the monorail crane, realizing the braking of the monorail crane. At this time, the electric cylinder 1 is energized and rotates, pushing the output end of the electric cylinder 1 to the right, pushing the movable soft iron 64 to the right, and causing the first limit block 611 to slide outward. The second limit block 612 rotates and resets. When the output end of the electric cylinder 1 contacts the third limit block 613, the rotation of the electric cylinder 1 stops, and the actuator is in the extended state. At this time, the monorail crane is braked.

[0022] When the monorail needs to be operated and the brake needs to be released, the electromagnet 63 is energized, attracting the movable soft iron 64. At the same time, the electric cylinder 1 is energized and rotates, pulling the output end back to the left. The distance between the first connecting ear 2 and the second connecting ear 4 is shortened, compressing the brake spring 5, releasing the brake, and the locomotive starts to run.

[0023] like Figure 3 As shown, when a locomotive malfunction causes the actuator to lose power, the fail-safe mechanism 6 stops working, the electric cylinder 1 disengages from the fail-safe mechanism 6, and under the action of the brake spring 5, the distance between the first connecting ear 2 and the second connecting ear 4 increases, so that the force of the brake spring 5 is applied to the brake shoes, thereby realizing the emergency braking of the monorail.

[0024] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. They can be applied to various fields suitable for the present invention. For those skilled in the art, other modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details.

Claims

1. An electrically operated fail-safe actuator for braking a monorail crane locomotive, comprising two oppositely arranged actuators, characterized in that, include: The electric cylinder has its output end set horizontally. A first connecting lug is disposed at the neck of the electric cylinder; A brake sleeve is fitted on the outside of the electric cylinder and slidably connected to the outer surface of the electric cylinder, and is closed and connected to the brake shoe on the side near the output end of the electric cylinder. The second connecting lug is disposed on the outer periphery of the closed end of the brake sleeve; A braking spring is disposed between the first connecting lug and the second connecting lug; And a fail-safe mechanism, which is disposed between the output end of the electric cylinder and the closed end of the brake sleeve and such that the second connecting lug is in the brake position or the idle position.

2. The electrically operated fail-safe actuator for braking a monorail crane locomotive as described in claim 1, characterized in that, The fail-safe mechanism includes: At least two movable hooks are hinged within the brake sleeve, and each movable hook includes a first limiting block near the closed end, a second limiting block near the output end of the electric cylinder, and a third limiting block located between the first limiting block and the second limiting block. The hinge point of the movable hook is located near the third limiting block. A limiting retaining ring is disposed at the head end of the output end of the electric cylinder; An electromagnet is disposed inside the closed end of the brake sleeve; And a movable soft iron, which is set on the side of the third limiting block near the second limiting block by a tension spring; in; When the tension spring is in its natural state, the movable soft iron and the electromagnet are not in contact. The outer diameter of the limiting ring is larger than the inner diameter of the shape formed by the second limiting block.

3. The electrically operated fail-safe actuator for braking a monorail crane locomotive as described in claim 2, characterized in that, The limiting ring is frustoconical and matches the shape of the third limiting block; The movable soft iron is truncated cone-shaped on the side closest to the electromagnet, and cylindrical on the side closest to the card spring, abutting against the inner side of the first limiting block.

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