Elastic coupling for lifting system of crane
By using elastic couplings in the crane lifting system, the left half coupling, right half coupling and spring-type elastic components are connected, the safety hazards caused by external forces of the rigid coupling are solved, and the stable operation and simple installation of the crane are achieved.
Patent Information
- Application Number
- CN202422188743.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-06
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-06
AI Technical Summary
In the existing crane lifting system, the rigid coupling is affected by external forces such as axial bleeding and radial pulsation during operation, resulting in larger connection gaps and damage to the limiting device, which poses safety hazards.
The left half coupling, right half coupling and spring-type elastic element are connected. The elastic element compensates for the axial and radial deviations, eliminates the influence of external forces, ensures that the driving shaft is coaxially connected to the driven shaft, and fixes the driven shaft with a pinch tightening mechanism.
It effectively avoids impact damage between the coupling and the driven shaft, ensures the safe and stable operation of the crane, is easy to install, adapts to different driven shaft lengths, and meets rigid requirements.
Smart Images
Figure CN223136759U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical transmission equipment, and particularly relates to an elastic coupling for a crane lifting system. Background Technique
[0002] The statements in this part are only to provide background information related to the technical solution of this application to help understanding, and they do not necessarily constitute the prior art for the technical solution of this application.
[0003] The crane lifting limit device is an important component of the crane. Its main function is to be connected to the crane lifting drum, and use the rotation of the drum to drive the rotation of the gear structure in the limit device. When the gear structure rotates a certain number of turns, the contacts in the limit device will disconnect the electrical circuit to achieve the limitation of the crane lifting height. In actual use, the driving shaft of the crane lifting drum is connected to the driven shaft of the lifting limit device through a rigid coupling. When the driving force of the lifting motor is relatively large, external forces such as axial displacement and radial runout that affect the running stability of the coupling will be generated during the operation of the coupling. Due to the influence of the external force and the fact that the rigid coupling does not have the condition of deformation, a gap appears between the rigid coupling and the driven shaft of the lifting limit device. After long-term operation, due to the increase in the gap, the center of the rigid coupling and the driven shaft cannot be on the same axis, the coupling hits the driven shaft, and then the limit device is damaged. Even the rigid coupling falls off and the hook head hits the top, which brings risks to the safe and stable operation of the crane. Summary of the Utility Model
[0004] The utility model provides an elastic coupling for a crane lifting system to solve the problems existing in the prior art.
[0005] The technical scheme adopted by the utility model is as follows: An elastic coupling for a crane lifting system includes a left half coupling, a right half coupling, and a spring-type elastic element arranged between the left half coupling and the right half coupling. One end of the left half coupling has a protruding horizontal one-word structure, and the other end is an embedded structure with a groove. One end of the right half coupling has a cylindrical structure with an axial hole in the center, and a tightening mechanism is arranged thereon. The other end is an embedded structure with a groove. The two ends of the spring-type elastic element are respectively embedded into the grooves of the left half coupling and the right half coupling to connect the left half coupling and the right half coupling together. The left half coupling is clamped to the driving shaft of the lifting drum of the crane lifting system through the horizontal one-word structure at one end. The driven shaft of the lifting limit device of the crane lifting system is inserted into the axial hole of the cylindrical structure of the right half coupling, and the tightening mechanism is used to tighten the driven shaft of the lifting limit device.
[0006] In one embodiment, the tightening mechanism includes at least one through hole that runs through the cylindrical structure in the radial direction.
[0007] In one embodiment, the through hole is a tightening screw hole, and the tightening mechanism further includes a tightening screw that is adapted to the tightening screw hole. The tightening screw passes through the tightening screw hole to tighten the driven shaft of the lifting limit device.
[0008] In one embodiment, the tightening mechanism further includes a fixing agent for fixing the tightening screw in the tightening screw hole.
[0009] In one embodiment, the tightening mechanism includes two or more through holes that run through the cylindrical structure in the radial direction.
[0010] In one embodiment, the spring-type elastic element is made of spring steel.
[0011] In one embodiment, the central axes of the left half coupling, the right half coupling, the spring-type elastic element, the driving shaft of the lifting drum, and the driven shaft of the lifting limit device are on the same line.
[0012] In one embodiment, anti-slip textures are provided on the inner surfaces of the grooves of the left half coupling and the right half coupling.
[0013] The utility model has the following beneficial effects:
[0014] (1) An elastic coupling for a crane lifting system provided by the utility model, by connecting the left half coupling and the right half coupling with a spring-type elastic element, enables a certain amount of deformation at the connection between the driving shaft of the lifting drum and the driven shaft of the lifting limit device, eliminating the external forces such as axial movement and radial runout during the operation of the coupling that affect the operation stability of the coupling when the driving force of the motor is relatively large, avoiding the occurrence of gaps at the connection between the coupling and the driven shaft, the situation where the center of the rigid coupling and the driven shaft cannot be on the same axis, and the coupling hitting the driven shaft, thereby damaging the limit device, and ensuring the safe and stable operation of the crane.
[0015] (2) An elastic coupling for a crane lifting system provided by the utility model, this coupling does not need to change the original structures of the driving shaft of the lifting drum and the driven shaft of the lifting limit device. Tightening screw holes are provided on the circumferential surface of the right half coupling, and the driven shaft of the lifting limit device is tightened by a tightening screw passing through the tightening screw hole, and the threaded hole at a suitable position can be selected according to the length of the driven shaft. The operation is simple and feasible, and it is convenient for on-site installation and disassembly;
[0016] (3) The elastic coupling for a crane lifting system provided by the present utility model has both ends of the spring-type elastic element embedded in the grooves of the left half-coupling and the right half-coupling, connecting the left half-coupling and the right half-coupling together. The spring-type elastic element is made of spring steel, and the spring steel can effectively compensate for radial, axial, and angular deviations, while meeting the rigidity requirements for connecting the driving shaft and the driven shaft. Brief Description of the Drawings
[0017] The following further describes the embodiments of the present utility model with reference to the accompanying drawings, where:
[0018] Figure 1 is a schematic diagram of the overall structure of the elastic coupling for a crane lifting system according to an embodiment of the present utility model.
[0019] In the figure, 1 - driven shaft of the lifting limit device, 2 - tightening mechanism, 3 - right half-coupling, 4 - spring-type elastic element, 5 - left half-coupling, 6 - driving shaft of the lifting drum. Detailed Embodiment
[0020] In order to make the purpose, technical solutions, and advantages of the present utility model clearer, the following further details the present utility model through specific embodiments with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.
[0021] Figure 1 is a schematic diagram of the overall structure of the elastic coupling for a crane lifting system according to an embodiment of the present utility model. The crane lifting system includes a driving shaft 6 of the lifting drum and a driven shaft 1 of the lifting limit device. The elastic coupling for the crane lifting system includes a left half-coupling 5, a right half-coupling 3, and a spring-type elastic element 4 disposed between the left half-coupling 5 and the right half-coupling 3. One end of the left half-coupling 5 has a protruding horizontal one-word structure, and the other end is an embedded structure with a groove. One end of the right half-coupling 3 has a cylindrical structure with an axial hole in the center, and is provided with a tightening mechanism 2 for tightening the driven shaft 1 of the lifting limit device. The other end is an embedded structure with a groove. Both ends of the spring-type elastic element 4 are respectively embedded in the grooves of the left half-coupling 5 and the right half-coupling 3, connecting the left half-coupling 5 and the right half-coupling 3 together. The left half-coupling 5 is clamped to the driving shaft 6 of the lifting drum of the crane lifting system through the horizontal one-word structure at one end. The driven shaft 1 of the lifting limit device of the crane lifting system is inserted into the axial hole of the cylindrical structure of the right half-coupling 3, and the tightening mechanism 2 is used to tighten the driven shaft 1 of the lifting limit device.
[0022] In one embodiment, the tightening mechanism 2 includes at least one through hole that penetrates the cylindrical structure and is opened radially. In one embodiment, the tightening mechanism 2 includes two or more through holes that penetrate the cylindrical structure and are opened radially.
[0023] In one embodiment, the through hole is a tightening screw hole, and the tightening mechanism 2 further includes a tightening screw that is adapted to the tightening screw hole. The tightening screw passes through the tightening screw hole to tighten the lifting limit device driven shaft 1. In one embodiment, the tightening mechanism 2 further includes a fastening agent for fixing the tightening screw in the tightening screw hole.
[0024] In one embodiment, the spring-type elastic element 4 is made of spring steel, and the spring steel can effectively compensate for radial, axial, and angular deviations, while meeting the rigidity requirements for connecting the driving shaft and the driven shaft.
[0025] In one embodiment, anti-slip textures are provided on the inner surfaces of the grooves of the left half coupling 5 and the right half coupling 3 to enhance the connection stability with the spring-type elastic element 4.
[0026] In one embodiment, the central axes of the left half coupling 5, the right half coupling 3, the spring-type elastic element 4, the lifting drum driving shaft 6, and the lifting limit device driven shaft 1 are on the same line.
[0027] When the elastic coupling of the present utility model is specifically used, the left half coupling 5 is clamped to the lifting drum driving shaft 6 through the transverse one-word structure at one end. The two ends of the spring-type elastic element 4 are respectively inserted into the grooves of the left half coupling 5 and the right half coupling 3 to connect the left half coupling 5 and the right half coupling 3 together. The lifting limit device driven shaft 1 is connected to the cylindrical structure with an axial hole of the right half coupling 3 by an insertion method. The tightening screw adapted to the tightening screw hole installed on the tightening mechanism 2 passes through the tightening screw hole to tighten the lifting limit device driven shaft 1 and is fixed in the threaded hole by a screw fastening agent. The spring-type elastic element 4 can be made of spring steel, and the spring steel can effectively compensate for radial, axial, and angular deviations, while meeting the rigidity requirements for connecting the driving shaft and the driven shaft.
[0028] In summary, an elastic coupling for a crane lifting system provided by the present utility model connects the left half coupling 5 and the right half coupling 3 with a spring-type elastic element 4, so that the coupling at the connection of the lifting drum driving shaft 6 and the limit device driven shaft 5 has a certain amount of deformation, eliminating the external forces that are likely to cause axial movement and radial runout during the operation of the rigid coupling, which affect the running stability of the coupling, when the driving force of the motor is relatively large. It avoids the occurrence of connection gaps due to wear between the rigid coupling and the driving shaft and the driven shaft, avoids the horizontal runout amount generated during the operation of the lifting drum from squeezing and damaging the lifting limit device, and prevents the hook head from hitting the top due to the damage of the lifting limit device, ensuring the long-term safe operation of the crane. This elastic coupling is convenient for installation and disassembly, and is simple and practical.
[0029] References herein to "each embodiment", "some embodiments", "an embodiment" or "embodiments" etc. refer to specific features, structures or properties described in connection with the embodiments being included in at least one embodiment. Thus, the appearances of the phrases "in each embodiment", "in some embodiments", "in an embodiment" or "in embodiments" etc. throughout this document are not necessarily referring to the same embodiment. Additionally, the specific features, structures or properties can be combined in any suitable manner in one or more embodiments. Therefore, the specific features, structures or properties shown or described in connection with one embodiment can be combined with the features, structures or properties of one or more other embodiments in whole or in part without limitation, as long as the combination is not illogical or inoperable. Expressions such as "in accordance with A", "based on A", "by A" or "using A" that appear in this document are meant to be non-exclusive, that is, "in accordance with A" can cover "only in accordance with A", and can also cover "in accordance with A and B", unless specifically stated to mean "only in accordance with A". In this application, for the sake of clear illustration, some illustrative operation steps are described in a certain order, but those skilled in the art can understand that each of these operation steps is not essential, some of the steps can be omitted or replaced by other steps. These operation steps do not necessarily have to be executed in the order shown. On the contrary, some of these operation steps can be executed in a different order according to actual needs, or executed in parallel, as long as the new execution method is not illogical or inoperable.
[0030] Some exemplary embodiments of the present utility model are described above. It can be understood that the above embodiments are only used to explain the present utility model and do not constitute a limitation to the protection scope of the present utility model. The features in these embodiments can be recombined in a suitable manner, and the solutions obtained thereby are still within the protection scope required by the present utility model. Based on the above embodiments, all other embodiments obtained by those skilled in the art without creative efforts, that is, all modifications, equivalent replacements, improvements, etc. made within the spirit and principle of this application, all fall within the protection scope required by the present utility model.
Claims
1. An elastic coupling for a crane lifting system, characterized in that: It includes a left half coupling (5), a right half coupling (3), and a spring-type elastic element (4) arranged between the left half coupling (5) and the right half coupling (3). One end of the left half coupling (5) has a protruding transverse one-word structure, and the other end is an embedded structure with a groove. One end of the right half coupling (3) has a cylindrical structure with an axial hole in the center, on which a tightening mechanism (2) is provided, and the other end is an embedded structure with a groove. The two ends of the spring-type elastic element (4) are respectively embedded in the grooves of the left half coupling (5) and the right half coupling (3) to connect the left half coupling (5) and the right half coupling (3) together. The left half coupling (5) is clamped with the driving shaft (6) of the hoisting drum of the crane lifting system through the transverse one-word structure at one end. The axial hole of the cylindrical structure of the right half coupling (3) inserts the driven shaft (1) of the lifting limit device of the crane lifting system, and the tightening mechanism (2) is used to tighten the driven shaft (1) of the lifting limit device.
2. The elastic coupling for a crane lifting system according to claim 1, characterized in that The tightening mechanism (2) includes at least one through hole radially opened through the cylindrical structure.
3. The elastic coupling for a crane lifting system according to claim 2, wherein The through hole is a tightening screw hole, and the tightening mechanism (2) further includes a tightening screw adapted to the tightening screw hole. The tightening screw passes through the tightening screw hole to tighten the driven shaft (1) of the lifting limit device.
4. The elastic coupling for a crane lifting system according to claim 3, characterized in that, The tightening mechanism (2) further includes a fixing agent for fixing the tightening screw in the tightening screw hole.
5. The elastic coupling for a crane lifting system according to claim 2, characterized in that, The tightening mechanism (2) includes two or more through holes radially opened through the cylindrical structure.
6. The elastic coupling for a crane lifting system according to claim 1, wherein The spring-type elastic element (4) is made of spring steel.
7. An elastic coupling for a crane lifting system according to claim 1, characterized in that, The central axes of the left half coupling (5), the right half coupling (3), the spring-type elastic element (4), the driving shaft (6) of the hoisting drum, and the driven shaft (1) of the lifting limit device are on the same line.
8. The elastic coupling for a crane lifting system according to claim 1, characterized in that, The inner surfaces of the grooves of the left half coupling (5) and the right half coupling (3) are both provided with anti-slip textures.