A tilting drive for a crane spreader

Abstract

The utility model discloses a kind of tilting drive devices for crane sling, including driving assembly, screw rod, shift fork, connecting rod, support roller assembly and steel wire rope, the driving assembly is connected with screw rod to drive screw rod linear reciprocating motion, one end of the screw rod is connected with shift fork, one end of the connecting rod is connected with steel wire rope, and the other end is hinged with shift fork;The support roller assembly includes roller and roller frame, the roller is rotatably connected with the side of connecting rod, the roller frame is equipped with guide rail groove, and the roller is arranged in guide rail groove by rolling. The utility model has the advantages of simple structure, easy to process and good transmission reliability.

Description

Technical Field

[0001] This utility model relates to the field of lifting equipment technology, and in particular to a tilting drive device for crane lifting devices. Background Technology

[0002] When aligning a container crane's spreader with a container, adjustments to the spreader's left-right, forward-backward, and rotational directions are necessary for convenient alignment. One type of container crane spreader adjustment utilizes a tilting mechanism to precisely attach and lower containers. This tilting mechanism adjusts the spreader system via a wire rope; the extension and retraction of the tilting mechanism's screw moves the wire rope, which in turn tilts the spreader system to align the container.

[0003] Chinese patent document CN201506674U discloses a tilting drive system for a container crane spreader. A threaded sleeve is mounted on the frame using bearings, and a screw rod is threaded into the sleeve. A slide is slidably connected to the frame, and a pressure plate is installed on the slide to fix the lifting wire rope to it. The pressure plate is hinged to one end of a connecting rod via a shaft, and the other end of the connecting rod is hinged to a shift fork via a pin. The end of the shift fork is connected to the end of the screw rod. The threaded sleeve is connected to a drive mechanism. By changing the tension of the lifting wire rope, the spreader can tilt forward / backward, tilt left / right, and rotate in a plane.

[0004] In this technical solution, the transmission of the screw's axial movement is ensured by sliding on the connecting slide. However, since the slide is exposed to salt spray for a long time, it is likely to rust due to environmental corrosion, which may obstruct the sliding and affect the screw transmission. It may also lead to inaccurate measurement by the lifting weight sensor. The slide needs to slide in contact with the frame, which requires high manufacturing precision, has a complex structure, complex manufacturing process, and high cost. The wire rope is fixed entirely by the friction generated by the tightening of the upper and lower pressure plates. Under heavy load and impact, the wire rope is prone to slippage, which poses a threat to the safety of the crane. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a tilting drive device for crane lifting equipment that has a simple structure, is easy to process, and has good transmission reliability.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A tilting drive device for a crane lifting device includes a drive assembly, a screw, a shift fork, a connecting rod, a support roller assembly, and a wire rope. The drive assembly is connected to the screw to drive the screw to reciprocate linearly. One end of the screw is connected to the shift fork, and one end of the connecting rod is connected to the wire rope, while the other end is hinged to the shift fork. The support roller assembly includes a roller and a roller frame. The roller is rotatably connected to the side of the connecting rod. The roller frame is provided with a guide rail groove, and the roller is rotatably disposed in the guide rail groove.

[0007] As a further improvement to the above technical solution: The guide rail groove is provided with limiting components at both ends for limiting the position of the rollers.

[0008] The support roller assembly also includes a support frame, bearings, and a connecting shaft. The support frame is connected to the side of the connecting rod, the connecting shaft is mounted on the support frame, and the rollers are mounted on the connecting shaft via bearings.

[0009] The bearing is a graphite bearing.

[0010] One end of the connecting rod is provided with a pin, and a collar is sleeved on the pin. The wire rope is wound around the collar and fixed by multiple rope clamps.

[0011] The tilt drive device for crane lifting equipment also includes a lifting capacity limiter for limiting the lifting load.

[0012] The lifting capacity limiter is a pin-type lifting capacity limiter, which is mounted on the shift fork, and the connecting rod is hinged to the shift fork through the lifting capacity limiter.

[0013] The tilting drive device for the crane lifting device further includes a first anti-breakage mechanism, which includes a flexible anti-breakage component. One end of the flexible anti-breakage component is connected to the shift fork, and the other end is connected to the crane.

[0014] The tilting drive device for the crane lifting device further includes a second anti-breakage mechanism, which includes a stop fixed on the crane. The stop has a through hole for the wire rope and rope clamp to pass through, and for blocking the shift fork and connecting rod.

[0015] The drive assembly includes a support, on which a motor and a reducer are mounted. The motor is connected to the reducer via a coupling, and the reducer is connected to a screw.

[0016] Compared with the prior art, the advantages of this utility model are: 1. The tilting drive device for crane lifting devices of this utility model transmits the movement of the screw by setting a support roller assembly on the side of the connecting rod. It eliminates the need for structures such as a slide, making the structure simple, easy to process, and low in cost. The connecting rod is supported by the rollers rolling in the guide rail groove. Compared with the sliding method of the slide, it avoids poor transmission caused by the slide being stuck due to corrosion, making the transmission of the screw more reliable.

[0017] 2. The tilting drive device for crane lifting devices of this utility model limits the movement distance of the screw by limiting the limit component, which can prevent the screw from exceeding its designed stroke during movement, thus improving safety and stability.

[0018] 3. The tilting drive device for crane lifting gear of this utility model uses a rope clamp to fix the wire rope, which has a simple structure, is easy to disassemble and assemble, and has a reliable connection, which can reduce the phenomenon of rope slippage caused by the loosening of the pressure plate friction.

[0019] 4. The tilting drive device for crane lifting devices of this utility model, the pin-type lifting capacity limiter can directly sense the tension borne by the connecting rod, reduce intermediate connecting parts, has a compact structure, and avoids the influence of multi-stage force transmission on the measurement accuracy of the lifting capacity limiter, thereby more accurately judging the load status.

[0020] 5. The tilting drive device for crane lifting equipment of this utility model can buffer and protect the crane if components such as screws break during lifting operations, thereby reducing the risk of the load falling and improving the safety of lifting operations.

[0021] 6. The tilting drive device for crane lifting equipment of this utility model has a through hole size larger than that of the wire rope and rope clamp, but smaller than that of the shift fork and connecting rod. If components such as the screw break, the shift fork and connecting rod can be blocked by the stop, reducing the risk of the suspended load falling and further improving the safety of lifting operations. Moreover, the safety is even better through the dual protection of the first anti-breakage mechanism and the second anti-breakage mechanism. Attached Figure Description

[0022] Figure 1 This is a front view of the tilting drive device for crane lifting devices according to this utility model.

[0023] Figure 2 This is a top view of the tilting drive device for crane lifting devices according to this utility model.

[0024] Figure 3 This is a cross-sectional view of the support roller assembly in the tilting drive device for crane lifting devices according to this utility model.

[0025] Legend: 1. Drive assembly; 11. Support; 12. Motor; 13. Reducer; 14. Coupling; 2. Screw; 3. Shift fork; 4. Connecting rod; 41. Pin; 42. Collar; 43. Rope clamp; 5. Support roller assembly; 51. Roller; 52. Roller frame; 53. Guide rail groove; 54. Limiting component; 55. Support frame; 56. Bearing; 57. Connecting shaft; 6. Lifting capacity limiter; 7. Flexible anti-breakage component; 8. Stop; 81. Through hole; 9. Wire rope. Detailed Implementation

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "assembly," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] like Figures 1 to 3 As shown, the tilting drive device for crane lifting device in this embodiment includes a drive assembly 1, a screw 2, a shift fork 3, a connecting rod 4, a support roller assembly 5, and a wire rope 9. The drive assembly 1 is connected to the screw 2 to drive the screw 2 to reciprocate linearly. One end of the screw 2 is connected to the shift fork 3, and one end of the connecting rod 4 is connected to the wire rope 9, while the other end is hinged to the shift fork 3. The support roller assembly 5 includes a roller 51 and a roller frame 52. The roller 51 is rotatably connected to the side of the connecting rod 4. The roller frame 52 is provided with a guide rail groove 53, and the roller 51 is rotatably disposed in the guide rail groove 53.

[0031] In this embodiment, the tilting drive device for a crane lifting device operates by driving component 1 driving screw 2 in linear reciprocating motion. Screw 2 drives shift fork 3 to move synchronously. The movement of shift fork 3 is transmitted to connecting rod 4 through hinge point. When connecting rod 4 moves, roller 51 rolls in guide rail groove 53 to support connecting rod 4. Finally, connecting rod 4 drives wire rope 9 to move to change the horizontal component of wire rope 9, thereby realizing the tilting of crane lifting device.

[0032] The tilting drive device for crane lifting devices in this embodiment transmits the movement of screw 2 by setting a support roller assembly 5 on the side of the connecting rod 4. It eliminates the need for structures such as a slide, making the structure simple, easy to manufacture, and low in cost. The connecting rod 4 is supported by the roller 51 rolling in the guide rail groove 53. Compared with the sliding method of the slide, this avoids poor transmission caused by the slide getting stuck due to corrosion, making the transmission of screw 2 more reliable.

[0033] Preferably, in this embodiment, each crane is equipped with multiple tilt drive devices to ensure that the lifting device can tilt in three directions: left, right, forward, backward, and slewing, making it more flexible and reliable.

[0034] Preferably, in this embodiment, the guide rail groove 53 is fixed to the crane by the roller frame 52, which provides good stability.

[0035] Furthermore, in this embodiment, the guide rail groove 53 is provided with limiting members 54 at both ends for limiting the roller 51. By limiting the roller 51 with the limiting members 54, the movement distance of the screw 2 is limited, which can prevent the screw 2 from exceeding its designed stroke during movement, thus improving safety and stability.

[0036] Furthermore, in this embodiment, the support roller assembly 5 also includes a support frame 55, a bearing 56, and a connecting shaft 57. The support frame 55 is connected to the side of the connecting rod 4, the connecting shaft 57 is mounted on the support frame 55, and the roller 51 is mounted on the connecting shaft 57 via the bearing 56. When the screw 2 reciprocates linearly, the roller 51 rolls in the guide groove 53. The support frame 55 only provides support and does not come into contact with other components. Compared to the sliding method of the carriage, the structure is simpler, reduces the machining precision of the support frame 55, and lowers the cost.

[0037] Furthermore, in this embodiment, bearing 56 is a graphite bearing. Graphite bearings can prevent corrosion caused by the environment and have better reliability.

[0038] Furthermore, in this embodiment, one end of the connecting rod 4 is provided with a pin 41, and a collar 42 is sleeved on the pin 41. The wire rope 9 is wound around the collar 42 and fixed by multiple rope clamps 43. The method of fixing the wire rope 9 with rope clamps 43 is simple in structure, convenient to disassemble and assemble, and reliable in connection, which can reduce the phenomenon of rope slippage caused by the loosening of the pressure plate friction.

[0039] Furthermore, in this embodiment, the tilting drive device for the crane lifting device also includes a lifting capacity limiter 6 for limiting the lifting load. The lifting capacity limiter 6 judges the load status by the tension of the wire rope 9. When the load exceeds the set value, the lifting capacity limiter 6 can issue an alarm or cut off the power source in a timely manner, effectively preventing the crane from having a safety accident due to overload and ensuring the safety of lifting operations.

[0040] Furthermore, in this embodiment, the lifting capacity limiter 6 is a pin-type lifting capacity limiter, which is mounted on the shift fork 3, and the connecting rod 4 is hinged to the shift fork 3 through the lifting capacity limiter 6. The pin-type lifting capacity limiter can directly sense the tension borne by the connecting rod 4, reducing intermediate connecting parts, making the structure compact, and avoiding the influence of multi-stage force transmission on the measurement accuracy of the lifting capacity limiter 6, thereby more accurately judging the load status.

[0041] Furthermore, in this embodiment, the tilting drive device for the crane lifting device also includes a first anti-breakage mechanism, which includes a flexible anti-breakage component 7. One end of the flexible anti-breakage component 7 is connected to the shift fork 3, and the other end is connected to the crane. During the lifting operation, if components such as the screw 2 break, the flexible anti-breakage component 7 can act as a buffer and protector, reducing the risk of the suspended load falling and improving the safety of the lifting operation.

[0042] Furthermore, in this embodiment, the tilting drive device for the crane lifting device also includes a second anti-breakage mechanism. The second anti-breakage mechanism includes a stop 8 fixed on the crane. The stop 8 has a through hole 81, which is used for the wire rope 9 and rope clamp 43 to pass through and to block the shift fork 3 and connecting rod 4. That is, the size of the through hole 81 is larger than the size of the wire rope 9 and rope clamp 43, but smaller than the size of the shift fork 3 and connecting rod 4. If the screw 2 or other components break, the shift fork 3 and connecting rod 4 can be blocked by the stop 8, reducing the risk of the load falling and further improving the safety of the lifting operation. Moreover, the safety is better due to the dual protection of the first and second anti-breakage mechanisms.

[0043] Furthermore, in this embodiment, the drive assembly 1 includes a support 11, on which a motor 12 and a reducer 13 are mounted. The motor 12 is connected to the reducer 13 via a coupling 14, and the reducer 13 is connected to the screw 2. After the motor 12 starts, its output torque is transmitted to the reducer 13 through the coupling 14. After the reducer 13 reduces speed and increases torque, the torque is then transmitted to the screw 2, driving the screw 2 to perform linear reciprocating motion. This drive method can provide stable and sufficient power, ensuring that the screw 2 can work reliably under various working conditions, thereby ensuring the normal operation of the entire tilting drive device.

[0044] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to preferred embodiments, it is not intended to limit the present utility model. Any person skilled in the art can make many possible variations and modifications to the technical solution of the present utility model using the methods and techniques disclosed above, or modify it into equivalent embodiments with equivalent changes, without departing from the spirit and technical solution of the present utility model. Therefore, any simple modifications, equivalent substitutions, equivalent changes and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A tilting drive device for a crane lifting device, characterized in that: It includes a drive assembly (1), a screw (2), a shift fork (3), a connecting rod (4), a support roller assembly (5), and a steel wire rope (9). The drive assembly (1) is connected to the screw (2) to drive the screw (2) to reciprocate linearly. One end of the screw (2) is connected to the shift fork (3), and one end of the connecting rod (4) is connected to the steel wire rope (9), while the other end is hinged to the shift fork (3). The support roller assembly (5) includes a roller (51) and a roller frame (52). The roller (51) is rotatably connected to the side of the connecting rod (4). The roller frame (52) is provided with a guide rail groove (53). The roller (51) is rotatably disposed in the guide rail groove (53).

2. The tilting drive device for a crane lifting device according to claim 1, characterized in that: The guide rail groove (53) is provided with limiting members (54) at both ends for limiting the roller (51).

3. The tilting drive device for a crane lifting device according to claim 1, characterized in that: The support roller assembly (5) also includes a support frame (55), a bearing (56) and a connecting shaft (57). The support frame (55) is connected to the side of the connecting rod (4). The connecting shaft (57) is mounted on the support frame (55). The roller (51) is mounted on the connecting shaft (57) via the bearing (56).

4. The tilting drive device for a crane lifting device according to claim 3, characterized in that: The bearing (56) is a graphite bearing.

5. The tilting drive device for a crane lifting device according to claim 1, characterized in that: One end of the connecting rod (4) is provided with a pin (41), and a collar (42) is sleeved on the pin (41). The wire rope (9) is wound around the collar (42) and fixed by multiple rope clamps (43).

6. The tilting drive device for a crane lifting device according to claim 1, characterized in that: The tilt drive device for the crane spreader also includes a lifting capacity limiter (6) for limiting the lifting load.

7. The tilting drive device for a crane lifting device according to claim 6, characterized in that: The lifting capacity limiter (6) is a pin-type lifting capacity limiter. The lifting capacity limiter (6) is located on the shift fork (3). The connecting rod (4) is hinged to the shift fork (3) through the lifting capacity limiter (6).

8. The tilting drive device for a crane lifting device according to claim 1, characterized in that: The tilting drive device for the crane lifting device also includes a first anti-breakage mechanism, which includes a flexible anti-breakage component (7). One end of the flexible anti-breakage component (7) is connected to the shift fork (3), and the other end is connected to the crane.

9. The tilting drive device for a crane lifting device according to claim 1, characterized in that: The tilting drive device for the crane lifting device also includes a second anti-breakage mechanism, which includes a stop (8) fixed on the crane. The stop (8) has a through hole (81) for the wire rope (9) and rope clamp (43) to pass through, and for blocking the fork (3) and connecting rod (4).

10. The tilting drive device for a crane lifting device according to any one of claims 1 to 9, characterized in that: The drive assembly (1) includes a support (11), on which a motor (12) and a reducer (13) are provided. The motor (12) is connected to the reducer (13) via a coupling (14), and the reducer (13) is connected to the screw (2).

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