A swinging guide pulley with a limited swing angle range and a braking function

Abstract

The present invention relates to a swinging guide pulley with a swing angle range limitation and braking function, which comprises a pulley body, an electromagnetic brake, a rotating frame and a limiting plate; the pulley body is installed at the front end of the rotating frame through a pin shaft; the rotating frame comprises a rotating shaft, and the upper end of the rotating shaft is connected with the electromagnetic brake rotor of the electromagnetic brake; the friction plate of the electromagnetic brake is sleeved at the lower end of the electromagnetic brake rotor and fixed on the installation device; when the electromagnetic brake is powered on, the electromagnetic brake rotor rotates to contact the friction plate to generate frictional force, and the rotating shaft stops rotating through the frictional force; the limiting plate is installed on the electromagnetic brake rotor, a limiting groove is arranged on the limiting plate, and a limiting bolt passes through the limiting groove and is fixed on the installation device; when the pulley body swings, the swinging range of the pulley body is limited by the limitation of the limiting bolt by the limiting groove. The present invention can limit the allowable swinging range during work, can be safely braked when not working, can meet the cable guiding requirements at the same time, and ensure the safety of operation and storage.

Description

Technical Field

[0001] The present invention relates to a swing guiding pulley for marine lifting operations, and particularly to a swing guiding pulley with a swing angle range limitation and a braking function. Background Art

[0002] Swing guiding pulleys are widely used in ocean scientific research and offshore lifting operations. For typical swing guiding pulleys, as described in patents CN202415025U, CN111153342A, CN214187259U, etc., in addition to being able to rotate around the return rotation shaft to guide the cable, the pulley and its bracket can also swing integrally around the swing shaft to adapt to the adjustment and change of the cable direction during the operation. Some swing guiding pulleys (such as CN111153342A) also add a spring support device to limit the working angle of the pulley.

[0003] In practical applications, according to the cable guiding requirements, sometimes it is necessary to limit the swing angle of the swing guiding pulley, that is, only allow the pulley to swing within a certain angle range. Although the spring support device can also limit the swing angle of the pulley to a certain extent, this solution is more suitable for the situation where the pulley has a stable working swing direction and swings at a small angle near this position. When the swing pulley needs to swing back and forth within a larger angle range, the spring restoring force at the larger swing angle position will cause a large lateral extrusion and wear between the cable and the edge of the pulley rope groove, which will have an adverse impact on the equipment in the long term.

[0004] In addition, when the cable has an external load traction during the working state, the swing direction of the swing pulley can be in a stable state; when the swing pulley loses external traction during the non-working or storage state, due to the lack of swing shaft braking measures, there are significant irregular movements of the ship and platform under the conditions of navigation or high sea states, and the swing pulley will be affected and generate a large swing amplitude and impact, which will greatly increase the risk of collision with the hull structure, and at the same time increase the risk of cable wear and failure.

[0005] Due to the reciprocating swing working characteristics of the swing pulley, when using conventional cable anti-jumping pins or adding anti-jumping cable blocks at the gaps on both sides of the pulley and the bracket, the continuous extrusion and friction between the cable and the side wall of the rope groove cannot be completely eliminated. When the cable tension fluctuates greatly, there is still a risk of the cable jumping out of the rope groove and causing an operation accident. Summary of the Invention

[0006] To solve the problems existing in the above-mentioned prior art, the present invention provides a swinging guide pulley with a swing angle range limitation and braking function, which can solve the problems of large lateral extrusion and wear between the cable and the edge of the pulley rope groove when the conventional swinging pulley swings back and forth in a large angle range, and when in a non-working or storage state, due to the lack of a swing shaft braking measure for the swinging pulley, it is affected by navigation or high sea state conditions and generates a large swing amplitude and impact, resulting in risks such as collision with the hull structure, cable wear and failure risks. At the same time, it avoids the risk problem of the cable jumping out of the rope groove and causing an operation accident when the conventional anti-jumping cable measure continuously squeezes and rubs the cable against the side wall of the rope groove and the cable tension fluctuates greatly.

[0007] To achieve the above object, the specific technical solution of the present invention is as follows:

[0008] A swinging guide pulley with a swing angle range limitation and braking function, the swinging guide pulley includes a pulley body, an electromagnetic brake, a rotating frame and a limiting plate;

[0009] The pulley body is installed at the front end of the rotating frame through a pin shaft; the pulley body can rotate around the pin shaft;

[0010] The rotating frame is installed at the working position of the swinging guide pulley through an installation device; the rotating frame includes a rotating shaft, and the upper end of the rotating shaft is connected to the electromagnetic brake rotor of the electromagnetic brake; the friction plate of the electromagnetic brake is sleeved on the lower end of the electromagnetic brake rotor and fixed on the installation device; when the electromagnetic brake is energized, the electromagnetic brake rotor rotates and contacts the friction plate to generate a frictional force, and the rotating shaft stops rotating through the frictional force;

[0011] The limiting plate is installed on the electromagnetic brake rotor, and a limiting groove is provided on the limiting plate. The limiting bolt passes through the limiting groove and is fixed on the installation device; the limiting groove is an arc groove concentric with the limiting plate; when the pulley body swings, the swinging range of the pulley body is limited by the limitation of the limiting bolt through the limiting groove.

[0012] Further, the swinging guide pulley further includes a guiding device, and the guiding device is sleeved on the pin shaft of the pulley body through an opening.

[0013] Further, the guiding device includes a support arm and a four-roller structure. One end of the support arm is provided with the opening, and the other end is installed with the four-roller structure; the cable passes through the four-roller structure and extends towards the pulley body.

[0014] Further, the four-roller structure includes a transverse roller and a longitudinal roller; the two transverse rollers are horizontally arranged at intervals above and below on the support arm; two support plates are symmetrically installed above and below at the end of the support arm, and the two longitudinal rollers are longitudinally arranged at intervals left and right between the two support plates; there is a predetermined interval between the transverse roller and the longitudinal roller.

[0015] Further, the electromagnetic brake further includes a shaft key, and the upper end of the rotating shaft is connected to the electromagnetic brake rotor through the shaft key.

[0016] Further, the friction plate is sleeved on the upper end of the electromagnetic brake rotor and placed below the limit plate, and the friction plate and the limit plate are fixed on the electromagnetic brake rotor together through fixing bolts.

[0017] Further, the installation device is a bearing seat, and the two bearing seats are respectively placed on the upper and lower sides of the rotating frame; the bearing seat includes a bearing base and a shaft end cover plate; the bearing base is fixed on the installation base; the shaft end cover plate is installed above the bearing base; a rolling bearing is arranged in the bearing base and is in rolling contact with the rotating shaft; the rotating frame is placed on the shaft end cover plate of the lower bearing seat, the friction plate at the lower end of the electromagnetic brake rotor is placed on the shaft end cover plate of the upper bearing seat, and the friction plate at the lower end of the electromagnetic brake rotor and the shaft end cover plate are fixed on the bearing base through installation bolts.

[0018] Further, the limit plate is of a circular structure, and a plurality of limit grooves with different arc lengths are arranged on the limit plate, and the diameters of the plurality of limit grooves are the same.

[0019] Further, the rotating frame further includes a fixing plate, the fixing plate is of a U-shaped structure, the rotating shaft is fixed at the center of the inner end of the fixing plate, and both ends of the pin shaft of the pulley body are symmetrically installed on the inner side of the front end of the fixing plate.

[0020] Further, a bearing is arranged at the center of the pulley body, the pin shaft passes through the bearing and is hinged to the rotating frame; a rope groove is arranged on the circumference of the pulley body.

[0021] Advantages of the present invention:

[0022] The swing guiding pulley with a swing angle range limitation and braking function provided by the present invention can solve the problems that when a conventional swing pulley swings back and forth within a large angle range, there is a large lateral extrusion and wear between the cable and the edge of the pulley rope groove, and when in a non-working or storage state, due to the lack of a swing shaft braking measure for the swing pulley, it will generate a large swing amplitude and impact under the influence of navigation or high sea state conditions, resulting in risks of collision with the hull structure, cable wear and failure, etc. At the same time, it can avoid the risk problem that when the conventional anti-jumping cable measure continuously squeezes and rubs between the cable and the side wall of the rope groove and the cable tension fluctuates greatly, the cable jumps out of the rope groove, leading to operation accidents. In addition, the swing guiding pulley of the present invention is installed by bolt hinge, with high flexibility, and is suitable for operations such as offshore lifting and scientific research exploration.

[0023] The swing guiding pulley of the present invention integrates main components such as a limit plate, an electromagnetic brake, and a guiding device. Through the limit plate, the swing angle range is limited, reducing the lateral extrusion and wear between the cable and the edge of the pulley rope groove, and extending the service life of the product. Through the frictional force generated when the electromagnetic brake is energized, the swing guiding pulley realizes swing braking in a non-working or storage state, reducing the risk of collision with the hull structure, as well as cable wear and failure risks under navigation or high sea state conditions. Through the four-roller structure of the guiding device, the cable can be limited in four directions of up, down, left, and right. Compared with the existing measures of using pins, blocks, etc. to prevent the cable from jumping out, it can not only completely eliminate the extrusion and friction between the cable and the side wall of the rope groove, but also ensure that when the cable tension fluctuates greatly, the cable will not jump out of the rope groove, thus causing operation accidents, improving the operation safety of the swing guiding pulley, and at the same time, it can also ensure the angle at which the cable extends into the rope groove on the pulley body, further preventing the cable from jumping out of the rope groove. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the overall structure of the swing guiding pulley with a swing angle range limitation and braking function of the present invention;

[0025] Figure 2 It is a top view of the limit plate and the mounting base in the present invention;

[0026] Figure 3 is Figure 2 a partial cross-sectional view of the bearing seat and the electromagnetic brake in it.

[0027] Wherein: 1 - guiding device, 2 - pulley body, 3 - electromagnetic brake, 4 - rotating frame, 5 - limit plate, 6 - bearing seat, 7 - mounting base, 8 - limit bolt, 9 - bearing base, 10 - rolling bearing, 11 - mounting bolt, 12 - shaft end cover plate, 13 - rotating shaft, 14 - friction plate, 15 - electromagnetic brake rotor, 16 - fixing bolt, 17 - shaft key, 18 - support arm, 19 - transverse roller, 20 - longitudinal roller, 21 - support plate, 22 - limit groove. Detailed implementation mode

[0028] In order to enable those skilled in the art to better understand the technical solution of the present application, the present invention will be further described in detail below in conjunction with the drawings and embodiments.

[0029] The orientation terms such as up, down, left, right, front and back in the present application document are established based on the positional relationship shown in the drawings. If the drawings are different, the corresponding positional relationship may also change accordingly, so it cannot be understood as a limitation of the protection scope.

[0030] In the present invention, terms such as "installation", "connection", "engagement", "connection", "fixation" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection or a connection that can communicate with each other, a direct connection, or an indirect connection through an intermediate medium. It can be the connection inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] This embodiment records a swinging guide pulley with a swing angle range limitation and a braking function. When it works, it can limit the allowable range of the swing angle, and can be safely braked when it is not working.

[0032] As Figure 1 and Figure 3 shown, the swinging guide pulley is composed of components such as a guiding device 1, a pulley body 2, an electromagnetic brake 3, a rotating frame 4, a limiting plate 5, a bearing seat 6, etc. The pulley body 2 is connected to the electromagnetic brake 3 through the rotating frame 4, and the electromagnetic brake 3 is used to stop the swing of the pulley body 2. The guiding device 1 is hinged and installed on the pulley body 2 for guiding the cable. Two bearing seats 6 are respectively placed on the upper and lower sides of the rotating frame 4 and are respectively fixed on the installation base 7. The limiting plate 5 is arranged above the electromagnetic brake 3 for limiting the swing angle of the swinging guide pulley.

[0033] In this embodiment, a bearing is provided at the center of the pulley body 2, and a pin shaft passes through the bearing and is hinged to the rotating frame 4. The pulley body 2 can rotate around the pin shaft to realize the cable guiding function of the swinging guide pulley. In addition, a rope groove is provided on the circumference of the pulley body 2, and different rope grooves and pulley diameters can be designed according to the cable specifications to meet the cable guiding requirements of different types of cables.

[0034] The guiding device 1 includes a support arm 18, a transverse roller 19, a longitudinal roller 20, and a support plate 21. One end of the support arm 18 has an opening, and through the opening, the support arm 18 is sleeved on the pin shaft of the pulley body 2, and the support arm 18 can swing around the pin shaft together with the cable. The other end of the support arm 18 is used to install the transverse roller 19 and the support plate 21. Specifically, two transverse rollers 19 are horizontally arranged at an upper and lower interval and are respectively installed on the support arm 18 through their ends, and are located on the side close to the pulley body 2. Two support plates 21 are symmetrically installed at the end of the support arm 18 up and down, and two longitudinal rollers 20 are placed between the two support plates 21 in a longitudinally arranged manner with a left and right interval, and both ends of the longitudinal roller 20 are respectively installed on the two support plates 21. There is a predetermined interval between the transverse roller 19 and the longitudinal roller 20, and the two transverse rollers 19 and the two longitudinal rollers 20 form a four-roller structure. The cable passes through the four-roller structure (i.e., between the two longitudinal rollers 20 and between the two transverse rollers 19) to prevent the cable from jumping off the cable.

[0035] In this embodiment, both the transverse roller 19 and the longitudinal roller 20 are composed of a support shaft and a drum. The support shaft is used to connect with the support plate 21, and the drum is sleeved on the support shaft and can rotate around the support shaft. When the transverse roller 19 and the longitudinal roller 20 are in contact with the cable, while the drum limits the cable, it also reduces the friction of the cable on the guiding device.

[0036] Or in another embodiment, the guiding device 1 can also use two support arms 18 to support the four-roller structure to achieve cable guiding. One end of the two support arms 18 is symmetrically installed at both ends of the pin shaft of the pulley body 2, and the other ends are respectively connected to the two support plates 21.

[0037] The rotating frame 4 of this embodiment at least includes a rotating shaft 13 and a fixing plate. The fixing plate is a U-shaped structure. The rotating shaft 13 is fixed at the center of the inner end of the fixing plate, and its upper and lower ends are respectively in rolling contact with the bearing seat 6 through the rolling bearings 10 arranged in the bearing seat 6. The upper end of the rotating shaft 13 is connected to the electromagnetic brake rotor 15 through the rolling bearing 10. Both ends of the pin shaft of the pulley body 2 are symmetrically hinged to the inner side of the front end of the fixing plate. When the pulley body 2 swings, it drives the rotating frame 4 to rotate around the rotating shaft 13.

[0038] An installation through hole is provided on the side of the bearing base 9 of the bearing seat 6 and is fixed on the installation base 7 through bolts. The installation base 7 is located at the position where the swinging guiding pulley needs to work. The rolling bearing 10 is arranged at the center of the bearing base 9, and a shaft end cover plate 12 is provided on the upper part of the bearing base 9. The rotating frame 4 is placed on the shaft end cover plate 12 of the lower bearing seat 6, and the shaft end cover plate 12 of the upper bearing seat 6 is connected to the electromagnetic brake 3.

[0039] The electromagnetic brake 3 includes a friction plate 14, an electromagnetic brake rotor 15, and a shaft key 17. Two friction plates 14 are respectively sleeved on the upper and lower ends of the electromagnetic brake rotor 15. The upper friction plate 14 is placed between the limit plate 5 and the electromagnetic brake rotor 15, and the lower friction plate 14 is placed on the shaft end cover plate 12 of the upper bearing seat 6. The upper friction plate 14 is fixed to the electromagnetic brake rotor 15 together with the limit plate 5 by fixing bolts 16 and rotates together with the electromagnetic brake rotor 15. The lower friction plate 14 uses mounting bolts 11 to fix the friction plate 14 and the shaft end cover plate 12 together on the bearing base 9. The upper end of the rotating shaft 13 of the rotating frame 4 passes through the rolling bearing 10 and is connected to the electromagnetic brake rotor 15 through the shaft key 17. When the electromagnetic brake 3 is energized, it rotates with the electromagnetic brake rotor 15 to contact the friction plate 14 to generate frictional force, and uses the frictional force to stop the rotation of the rotating shaft 13 to achieve the swing stop of the pulley body 2. In this embodiment, the electromagnetic brake 3 can also be replaced with a manual magnetic brake.

[0040] The limit plate 5 is of a circular structure. As Figure 2 shown, it is evenly provided with a plurality of mounting holes around the center. Through the plurality of mounting holes, the limit plate 5 is mounted on the electromagnetic brake rotor 15 by fixing bolts 16. A plurality of limit grooves 22 with the same diameter and different arc lengths are also provided on the limit plate 5. The limit grooves 22 are arc-shaped grooves concentric with the limit plate 5, and different arc lengths can realize the limitation of different swing angle ranges. The limit bolt 8 passes through the limit groove 22 of the required swing angle range and is connected to the bearing base 9. When the pulley body 2 swings, the limit plate 5 rotates together with the electromagnetic brake 3, and the swing angle of the pulley is limited by the limitation of the limit bolt 8 through the limit groove 22.

[0041] When the swing guiding pulley of this embodiment is in use, the cable passes through the four-roller structure of the guiding device 1 and is guided in the rope groove of the pulley body 2. When the working direction of the cable changes, the guiding device 1, the pulley body 2, and the rotating frame 4 swing together with the cable to achieve the guiding function. At the same time, the limit plate 5 rotates together with the rotating frame 4, and the swing angle is limited by the limitation of the limit bolt 8 through the limit groove 22. When different angle limitations are required, the limit grooves 22 with different angle ranges on the limit plate 5 can be selected. When the swing guiding pulley is not working, the electromagnetic brake 3 is energized, and the frictional force is used to stop the swing of the rotating shaft 13 of the rotating frame 4 to brake the swing guiding pulley and ensure the storage safety.

[0042] Although the principles of the present invention have been described in detail above in connection with the preferred embodiments of the present invention, those skilled in the art should understand that the above embodiments are merely explanations of the illustrative implementation manners of the present invention and do not limit the scope of the present invention. The details in the embodiments do not constitute a limitation on the scope of the present invention. Without departing from the spirit and scope of the present invention, any obvious changes such as equivalent transformations and simple substitutions based on the technical solution of the present invention fall within the protection scope of the present invention.

Claims

1. A swing guiding pulley with a swing angle range limit and a braking function, characterized in that, the swing guiding pulley comprises a pulley body (2), an electromagnetic brake (3), a rotating frame (4) and a limiting plate (5); the pulley body (2) is installed at the front end of the rotating frame (4) through a pin shaft; the pulley body (2) can rotate around the pin shaft; the rotating frame (4) is installed at the working position of the swing guiding pulley through an installation device; the rotating frame (4) comprises a rotating shaft (13), and the upper end of the rotating shaft (13) is connected with an electromagnetic brake rotor (15) of the electromagnetic brake (3); a friction plate (14) of the electromagnetic brake (3) is sleeved at the lower end of the electromagnetic brake rotor (15) and fixed on the installation device; when the electromagnetic brake (3) is electrified, the electromagnetic brake rotor (15) rotates to contact the friction plate (14) to generate a frictional force, and the rotating shaft (13) stops rotating through the frictional force; the limiting plate (5) is installed on the electromagnetic brake rotor (15), a limiting groove (22) is arranged on the limiting plate (5), and a limiting bolt (8) passes through the limiting groove (22) and is fixed on the installation device; the limiting groove (22) is an arc groove concentric with the limiting plate (5); when the pulley body (2) swings, the swing range of the pulley body (2) is limited by the limitation of the limiting bolt (8) through the limiting groove (22).

2. The swing guiding pulley with a swing angle range limit and a braking function according to claim 1, characterized in that characterized in that, the swing guiding pulley further comprises a guiding device (1), and the guiding device (1) is sleeved on the pin shaft of the pulley body (2) through an opening.

3. The swing guiding pulley with a swing angle range limit and a braking function according to claim 2, characterized in that, the guiding device (1) comprises a support arm (18) and a four-roller structure, one end of the support arm (18) is provided with the opening, and the other end is installed with the four-roller structure; a cable passes through the four-roller structure and extends towards the pulley body (2).

4. The swing guiding pulley with a swing angle range limit and a braking function according to claim 3, characterized in that, the four-roller structure comprises a transverse roller (19) and a longitudinal roller (20); two of the transverse rollers (19) are horizontally arranged at intervals up and down on the support arm (18); two support plates (21) are symmetrically installed at the ends of the support arm (18) up and down, and two of the longitudinal rollers (20) are longitudinally arranged at intervals left and right between the two support plates (21); a predetermined interval is provided between the transverse roller (19) and the longitudinal roller (20).

5. The swing guiding pulley with a swing angle range limit and a braking function according to claim 1, characterized in that, the electromagnetic brake (3) further comprises a shaft key (17), and the upper end of the rotating shaft (13) is connected with the electromagnetic brake rotor (15) through the shaft key (17).

6. The swing guiding pulley with swing angle range limitation and braking function according to claim 1, characterized in that, the friction plate (14) is sleeved on the upper end of the electromagnetic brake rotor (15) and placed below the limit plate (5), and the friction plate (14) is fixed on the electromagnetic brake rotor (15) together with the limit plate (5) through fixing bolts (16).

7. The swing guiding pulley with swing angle range limitation and braking function according to claim 1, characterized in that, the mounting device is a bearing seat (6), and two bearing seats (6) are respectively placed on the upper and lower sides of the rotating frame (4); the bearing seat (6) includes a bearing base (9) and a shaft end cover plate (12); the bearing base (9) is fixed on the mounting base (7); the shaft end cover plate (12) is installed above the bearing base (9); a rolling bearing (10) is arranged in the bearing base (9) and is in rolling contact with the rotating shaft (13); the rotating frame (4) is placed on the shaft end cover plate (12) of the lower bearing seat (6), and the friction plate (14) at the lower end of the electromagnetic brake rotor (15) is placed on the shaft end cover plate (12) of the upper bearing seat (6), and the friction plate (14) at the lower end of the electromagnetic brake rotor (15) and the shaft end cover plate (12) are fixed on the bearing base (9) through mounting bolts (11).

8. The swing guiding pulley with swing angle range limitation and braking function according to claim 1, characterized in that, the limit plate (5) is of a circular structure, and a plurality of limit grooves (22) with different arc lengths are arranged on the limit plate (5), and the diameters of the plurality of limit grooves (22) are the same.

9. The swing guiding pulley with swing angle range limitation and braking function according to claim 1, characterized in that, the rotating frame (4) further includes a fixing plate, the fixing plate is of a U-shaped structure, the rotating shaft (13) is fixed at the center of the inner end of the fixing plate, and both ends of the pin shaft of the pulley body (2) are symmetrically installed on the inner side of the front end of the fixing plate.

10. The swing guiding pulley with swing angle range limitation and braking function according to claim 1, characterized in that, a bearing is arranged at the center of the pulley body (2), the pin shaft passes through the bearing and is hinged with the rotating frame (4); a rope groove is arranged on the circumference of the pulley body (2).

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