Large braking force spring cylinder brake structure

Abstract

This invention discloses a high-force spring-cylinder brake structure, including a brake box, a hydraulic supply device, and a cable winch drum. The invention relies on the preload of a spring to lift the left end of the drive arm upwards. The drive arm rotates along the upper rotating seat, tightening the brake band and ensuring the cable winch drum is in a braking state. When the brake needs to be released, the hydraulic supply device provides power to the brake cylinder, causing the piston in the brake cylinder to retract and the left end of the drive arm to move downwards, thereby releasing the brake band. The included hydraulic accumulator, in the event of power source failure or power outage, controls the hydraulic accumulator to drive the brake cylinder via a pilot-operated check valve and a high-pressure brake valve, enabling emergency release of the drum. During drum release, the tension spring between the support plate and the brake band lifts the upper half of the brake band's annular structure, preventing the upper part of the brake band from remaining in contact with the drum when the brake is released, allowing for free drum release.

Description

Technical Field

[0001] This invention relates to the field of towing winch brake structure technology, and more particularly to a high-braking-force spring-cylinder brake structure. Background Technology

[0002] A towing winch is a type of marine equipment. A typical towing winch includes a hydraulic motor, a rotating mechanism, a cable-laying device, and a braking system. The winch's braking system primarily serves to secure and release the ship's cables.

[0003] The braking devices of existing winches are generally brake bands. Early braking operations generally relied on manual operation to tighten and release the brake bands to control the rotation of the drum. Manual operation usually cannot meet the working conditions of heavy-load marine machinery, and it is very dangerous for workers to crank the screw by hand, which can easily cause safety accidents.

[0004] To improve safety and adapt to the braking of large winches, many large winches use hydraulic cylinders to drive the brake bands. The tension and release of the brake band are generally driven by the extension and retraction of the hydraulic cylinder. However, existing hydraulically driven braking structures generally have the following problems: First, after prolonged use, the rebound force of the brake band deteriorates. When the brake band is released, the lower part of the brake band has already detached from the drum, while the upper part of the brake band remains in contact with the drum due to its own weight, resulting in poor drum rotation and continuous wear of the brake band. Second, the brake band needs to be taut in most situations and only released when the drum is working. Typical braking systems require the hydraulic cylinder to remain in a contracted state at all times, and the components in the hydraulic circuit are always in a working state. This results in a shorter lifespan for the hydraulic components and makes them prone to damage. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a high-braking-force spring-cylinder brake structure.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: It includes a brake box, a hydraulic supply device, and a towing cable winch drum. A connecting seat is fixedly connected to the right wall of the brake box near its lower wall. A brake band is rotatably connected to the end of the connecting seat away from the brake box. An inner frame is fixedly connected to the inner wall of the brake box. An upper rotating seat is fixedly connected to the upper inner wall of the inner frame. A drive arm is rotatably connected to the lower end of the upper rotating seat. The drive arm is rotatably connected to the upper rotating seat at its central position along its length. The end of the drive arm located on the right side of the upper rotating seat is rotatably connected to the end of the brake band away from the connecting seat. The brake band is formed into a ring-like structure by the drive arm and connecting seat. The towing winch drum is located inside the ring-like structure of the brake band. A bracket plate is fixedly connected to the upper wall of the brake box. The bracket plate is Z-shaped. A first lug is provided on the lower wall of the end of the bracket plate away from the brake box. A reset structure for lifting the brake band when not braking is provided between the first lug and the brake band. A drive structure for driving the brake band to tighten and loosen is provided between the end of the drive arm away from the brake band and the inner frame. An emergency structure for controlling the drive structure in an emergency is also provided on the lower inner wall of the inner frame.

[0007] As a further description of the above technical solution:

[0008] The reset structure includes a second lug and a tension spring. The second lug is fixedly connected to the outer wall of the brake band and located at the upper edge of the annular structure. The tension spring is sleeved between the second lug and the first lug.

[0009] As a further description of the above technical solution:

[0010] The inner wall of the bracket plate away from the brake box is provided with a sliding groove, and a slider is slidably connected to the inner side wall of the sliding groove. The first hanging ear is threadedly connected to the slider by a hexagonal screw.

[0011] As a further description of the above technical solution:

[0012] The drive structure is a brake cylinder, which is rotatably connected to the lower inner wall of the inner frame via a lower rotating seat. The end of the brake cylinder's extension shaft is rotatably connected to the end of the drive arm away from the brake band. The brake cylinder is a spring cylinder with a heavy-load spring inside, which is located between the lower inner wall of the brake cylinder and the piston.

[0013] As a further description of the above technical solution:

[0014] The emergency structure is a hydraulic accumulator, which is fixedly connected to the lower inner wall of the inner frame. The hydraulic accumulator is connected to the hydraulic supply device and drive structure through a pilot-operated check valve, a high-pressure stop valve, and oil pipes.

[0015] As a further description of the above technical solution:

[0016] The drive arm has a cylindrical cross-section. The frontal projection of the drive arm consists of two parallel and staggered straight sections and two arc segments connecting the two straight sections. The openings of the two arc segments are opposite, and the inner sidewalls of the arc segments are provided with reinforcing ribs.

[0017] The present invention has the following beneficial effects:

[0018] 1. Compared with existing technologies, this high-force spring cylinder brake structure is always in a normally closed state due to the compression of the heavy-load spring. It relies on the preload of the spring to push the left end of the drive arm upward. The drive arm rotates along the upper rotating seat to tighten the brake band, ensuring that the cable winch drum is in a braking state. When it is necessary to release the brake, the hydraulic supply device provides power to the brake cylinder, which drives the piston of the brake cylinder to retract and drives the left end of the drive arm to move downward, thereby releasing the brake band. The hydraulic accumulator can control the hydraulic accumulator to drive the brake cylinder and release the drum in case of power source failure or power outage through the pilot-operated check valve and high-pressure brake valve.

[0019] 2. Compared with the existing technology, this high braking force spring cylinder brake structure lifts the upper part of the brake band ring structure through the tension spring between the bracket plate and the brake band when the drum is released, so as to avoid the upper part of the brake band still being in contact with the drum when the brake is released, thus making the drum release free. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the high braking force spring cylinder brake structure proposed in this invention.

[0021] Figure 2 This is a partial cross-sectional view of the internal structure of the brake box of the high braking force spring cylinder brake structure proposed in this invention.

[0022] Figure 3 This is a partial cross-sectional view of the bracket plate, slider, and first lug connection structure of the high braking force spring cylinder brake structure proposed in this invention.

[0023] Legend:

[0024] 1. Brake box; 2. Connecting seat; 3. Brake band; 4. Brake plate; 5. Slider; 6. Slide groove; 7. First hanging ear; 8. Second hanging ear; 9. Inner frame; 10. Lower rotating seat; 11. Brake cylinder; 12. Hydraulic accumulator; 13. Upper rotating seat; 14. Drive arm; 15. Reinforcing rib; 16. Tension spring. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Reference Figures 1 to 3 The present invention provides a high-force spring-cylinder brake structure comprising a brake box 1, a hydraulic supply device, and a cable winch drum. A connecting seat 2 is fixedly connected to the right wall of the brake box 1 near its lower wall. A brake band 3 is rotatably connected to the end of the connecting seat 2 away from the brake box 1. An inner frame 9 is fixedly connected to the inner wall of the brake box 1. An upper rotating seat 13 is fixedly connected to the upper inner wall of the inner frame 9. A drive arm 14 is rotatably connected to the lower end of the upper rotating seat 13. The drive arm 14 is rotatably connected to the upper rotating seat 13 at its central position along its length. The end of the drive arm 14 located on the right side of the upper rotating seat 13 is rotatably connected to the end of the brake band 3 away from the connecting seat 2. The brake band 3 is formed into a ring-like structure by the drive arm 14 and the connecting seat 2. The cable winch drum is located on the brake band. Inside the annular structure 3, a bracket plate 4 is fixedly connected to the upper wall of the brake box 1. The bracket plate 4 is Z-shaped. A first lug 7 is provided on the lower wall of the end of the bracket plate 4 away from the brake box 1. A reset structure for lifting the brake band 3 when not braking is provided between the first lug 7 and the brake band 3. The reset structure includes a second lug 8 and a tension spring 16. The second lug 8 is fixedly connected to the outer wall of the brake band 3 and is located at the upper edge of the annular structure. The tension spring 16 is sleeved between the second lug 8 and the first lug 7. When the drum needs to be released, the lower half of the annular structure of the brake band 3 is released from the towing winch drum by its own weight, and the upper half is lifted by the tension of the tension spring 16, so that the brake band 3 does not contact the towing winch drum, the drum releases smoothly, and the wear of the brake band 3 is reduced during non-braking periods.

[0027] A groove 6 is provided on the inner wall of the bracket plate 4 away from the brake box 1. A slider 5 is slidably connected to the inner wall of the groove 6. The first lug 7 is threadedly connected to the slider 5 by a hexagonal screw. By loosening the hexagonal screw, the position of the slider 5 and the first lug 7 can be moved along the groove 6, thereby adjusting the correct force direction of the tension spring 16.

[0028] A drive structure for tightening and loosening the brake band 3 is provided between the end of the drive arm 14 away from the brake band 3 and the inner frame 9. The drive structure is a brake cylinder 11. The brake cylinder 11 is rotatably connected to the lower inner wall of the inner frame 9 through the lower rotating seat 10. The end of the extended shaft of the brake cylinder 11 is rotatably connected to the end of the drive arm 14 away from the brake band 3. The brake cylinder 11 is a spring cylinder with a heavy-load spring inside. The heavy-load spring is located between the lower inner wall of the brake cylinder 11 and the piston. During normal use, the brake cylinder 11 is in a non-powered state and braking is performed by the preload force of the heavy-load spring. The heavy-load spring can provide braking force of 80-250T.

[0029] The inner lower wall of the inner frame 9 is also provided with an emergency structure for controlling the drive structure in an emergency. The emergency structure is a hydraulic accumulator 12, which is fixedly connected to the inner lower wall of the inner frame 9. The hydraulic accumulator 12 is connected to the hydraulic supply device and drive structure through a pilot-operated check valve, a high-pressure stop valve and oil pipes. When the power source is lost or the power is cut off, the brake cylinder 11 can be controlled through the pilot-operated check valve and the high-pressure stop valve via the hydraulic accumulator 12, thereby realizing the emergency function.

[0030] The drive arm 14 has a cylindrical cross-section. The frontal projection of the drive arm 14 consists of two parallel and staggered straight sections and two arc sections connecting the two straight sections. The openings of the two arc sections are opposite, and the inner sidewalls of the arc sections are provided with reinforcing ribs 15. The reinforcing ribs 15 make the structure of the drive arm 14 more stable, ensuring that it will not deform under long-term stress and improving its service life.

[0031] Working principle: During normal use, the brake cylinder 11 is in a non-powered state and braking is achieved through the preload of the heavy-load spring. The hydraulic accumulator 12 is connected to the hydraulic supply device and drive structure through a pilot-operated check valve, a high-pressure stop valve, and oil pipes. When the power source is lost or the power is cut off, the brake cylinder 11 can be controlled through the pilot-operated check valve and the high-pressure stop valve via the hydraulic accumulator 12 to achieve emergency function. The setting of the reinforcing rib 15 makes the structure of the drive arm 14 more stable, ensuring that it will not deform under long-term stress and improving its service life. When the drum needs to be released, the lower half of the annular structure of the brake band 3 is detached from the towing winch drum by its own weight, while the upper half is lifted by the tension of the tension spring 16, so that the brake band 3 does not contact the towing winch drum, the drum release is smooth, and the wear of the brake band 3 is reduced during non-braking periods. By loosening the hexagonal screw, the position of the slider 5 and the first lug 7 can be moved along the slide groove 6, thereby adjusting the correct force direction of the tension spring 16.

[0032] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing 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 invention should be included within the protection scope of the present invention.

Claims

1. A high-braking-force spring-cylinder brake structure, comprising a brake box (1), a hydraulic supply device, and a cable winch drum, characterized in that: A connecting seat (2) is fixedly connected to the right wall of the brake box (1) near the lower wall. A brake band (3) is rotatably connected to the end of the connecting seat (2) away from the brake box (1). An inner frame (9) is fixedly connected to the inner side wall of the brake box (1). An upper rotating seat (13) is fixedly connected to the upper inner wall of the inner frame (9). A drive arm (14) is rotatably connected to the lower end of the upper rotating seat (13). The drive arm (14) is rotatably connected to the upper rotating seat (13) at the center of its length direction. The end of the drive arm (14) located on the right side of the upper rotating seat (13) is rotatably connected to the end of the brake band (3) away from the connecting seat (2). The brake band (3) is connected to the connecting seat (2) via the drive arm (14) and the connecting seat (2). 2) The limiting forms a ring-like structure. The towing cable winch drum is located inside the ring structure of the brake band (3). The upper wall of the brake box (1) is fixedly connected to a bracket plate (4). The bracket plate (4) is Z-shaped. The lower wall of the bracket plate (4) away from the brake box (1) is provided with a first hanging ear (7). A reset structure for lifting the brake band (3) when not braking is provided between the first hanging ear (7) and the brake band (3). A drive structure for driving the brake band (3) to tighten and loosen is provided between the end of the drive arm (14) away from the brake band (3) and the inner frame (9). An emergency structure for controlling the drive structure in an emergency state is also provided on the lower inner wall of the inner frame (9). The reset structure includes a second lug (8) and a tension spring (16). The second lug (8) is fixedly connected to the outer wall of the brake band (3) and located at the upper edge of the annular structure. The tension spring (16) is sleeved between the second lug (8) and the first lug (7). The inner wall of the bracket plate (4) away from the brake box (1) is provided with a groove (6). The inner side wall of the groove (6) is slidably connected to a slider (5). The first lug (7) is threadedly connected to the slider (5) by a hexagonal screw.

2. The high braking force spring-hydraulic cylinder brake structure according to claim 1, characterized in that: The drive structure is a brake cylinder (11). The brake cylinder (11) is rotatably connected to the lower inner wall of the inner frame (9) via a lower rotating seat (10). The end of the extended shaft of the brake cylinder (11) is rotatably connected to the end of the drive arm (14) away from the brake band (3). The brake cylinder (11) is a spring cylinder with a heavy-load spring inside. The heavy-load spring is located between the lower inner wall of the brake cylinder (11) and the piston.

3. The high braking force spring-hydraulic cylinder brake structure according to claim 2, characterized in that: The emergency structure is a hydraulic accumulator (12), which is fixedly connected to the lower inner wall of the inner frame (9). The hydraulic accumulator (12) is connected to the hydraulic supply device and drive structure through a pilot-operated check valve, a high-pressure stop valve and oil pipe.

4. The high braking force spring-hydraulic cylinder brake structure according to claim 3, characterized in that: The drive arm (14) has a cylindrical cross section in the transverse direction. The frontal projection of the drive arm (14) consists of two parallel and staggered straight sections and two arc sections connecting the two straight sections. The openings of the two arc sections are opposite and the inner sidewalls of the arc sections are provided with reinforcing ribs (15).

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