A buffer device for a slewing mechanism of a crane

Abstract

The utility model relates to rotary mechanism buffer device technical field, and disclose a kind of crane rotary mechanism buffer device, including rotary mechanism, rotary mechanism side is provided with hydraulic motor, and hydraulic motor is fixedly connected with hydraulic pipe and is passed through, and hydraulic pipe side is provided with adapter pipe, and the outer end of hydraulic pipe is screw pipe and is connected with screw pipe, and screw pipe side is provided with main body shell, through the equidistance type distribution of flow resistance piece and the design of unrelatedness between components, maintenance cost and time can be greatly reduced, maintenance efficiency is improved, the traditional maintenance predicament of "single component damage needs overall replacement" is completely avoided.When certain flow resistance piece or gear piece is damaged, the entire buffer device or all similar components do not need to be disassembled and replaced, only the faulty component needs to be disassembled and replaced, which not only reduces the parts procurement cost required for maintenance, but also greatly shortens the maintenance time, the maintenance operation is simpler, the maintenance time is shorter, and the maintenance cost and downtime of the equipment are effectively reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of buffer devices for slewing mechanisms, specifically a buffer device for a crane slewing mechanism. Background Technology

[0002] In various heavy-duty operation scenarios such as construction, port loading and unloading, and logistics transfer, cranes have become core equipment due to their efficient lifting capacity. The slewing mechanism, as a key component for realizing the horizontal rotation of the crane boom and the load, directly determines the safety and efficiency of the overall operation through its operational stability. Under current technology, the slewing mechanism of a crane is usually composed of a drive unit, a transmission unit, a slewing bearing, and a braking device working together to complete the precise slewing motion of the boom.

[0003] However, during actual operation, the slewing mechanism experiences significant inertial impact at the moment of starting or stopping due to the combined effects of its own structural mass, the load on the load, and the operating speed. Without effective buffering control, this inertial impact can cause excessive instantaneous loads on internal components of the slewing mechanism (such as gears and bearings), accelerating component wear and even causing structural damage and shortening equipment lifespan. It can also cause violent shaking of the hoisted load, increasing the risk of it falling. Furthermore, it often leads to collisions between the boom or auxiliary structures and surrounding equipment, buildings, pipelines, etc., during the slewing process, causing equipment malfunctions, line damage, and in severe cases, even personal injury or death, creating a major safety hazard. Although some buffer designs for rotary mechanisms exist in the existing technology, the existing designs generally have shortcomings such as limited buffering effect and poor adaptability (difficult to match different load and speed conditions). They cannot effectively solve the various risks caused by the inertial impact mentioned above, and cannot meet the stringent requirements of actual operation for the buffering performance of rotary mechanisms.

[0004] Therefore, we propose a buffer device for the slewing mechanism of a crane to solve the above problems. Utility Model Content

[0005] (a) Technical problem to be solved: In view of the shortcomings of the prior art, this utility model provides a buffer device for the slewing mechanism of a crane to solve the problems mentioned in the background art.

[0006] (II) Technical Solution: To achieve the above objectives, this utility model provides the following technical solution: A buffer device for a crane slewing mechanism, including a slewing mechanism, a hydraulic motor is provided on one side of the slewing mechanism, a hydraulic pipe is fixedly connected through the hydraulic motor, a connecting pipe is provided on one side of the hydraulic pipe, a threaded pipe is threaded to the outer end of the hydraulic pipe, and a main body shell is provided on one side of the threaded pipe.

[0007] Preferably, an annular groove is provided inside the main body shell, a gear disk is rotatably connected inside the annular groove, and drive teeth are fixedly connected at equal intervals on the inner annular wall of the main body shell.

[0008] Preferably, a spiral guide bar is fixedly connected to the gear disk, and square guide grooves are equidistantly penetrating the outer ring wall of the main body shell, with toothed components slidably connected inside the square guide grooves; The teeth of the toothed component are engaged in the gaps of the spiral guide bar.

[0009] Preferably, the main body shell is provided with an inner tube, and auxiliary grooves are equidistantly opened on the inner tube, with flow-blocking components slidably connected in the auxiliary grooves.

[0010] Preferably, the two spiral tubes are grouped together and symmetrically arranged on both sides of the main shell.

[0011] Preferably, the main shell consists of two semi-circular shells, which are fixed to the inner tube by screwing on.

[0012] Preferably, the spiral tube and the inner tube can be combined to form a channel for the flow of hydraulic oil.

[0013] (III) Beneficial Effects: Compared with the prior art, this utility model provides a buffer device for a crane slewing mechanism, which has the following beneficial effects: 1. This utility model, through adjusting the hydraulic pipe diameter using a flow-blocking component, throttling damping for energy absorption, and auxiliary deceleration at the drive end, offers the following advantages: Enhancing buffer reliability and addressing shortcomings in existing technologies: The core pain point of insufficient buffering in existing technologies is "passively bearing impacts," while this design actively intervenes from the drive end; that is, by adjusting the hydraulic pipe diameter through flow-blocking components, the drive speed of the hydraulic motor can be controlled, and in conjunction with throttling damping, the inertial impact energy during the start and stop of the rotary mechanism can be directly absorbed, avoiding the limitations of relying solely on traditional braking-end buffering; the above combination of "active speed control + passive energy absorption" can decelerate in advance when the rotary mechanism approaches the predetermined position, making the buffering process more controllable and stable, effectively solving the problem of "limited buffering effect" in existing technologies; Improving operational safety and mitigating safety risks: On the one hand, throttling and damping energy absorption and early deceleration can significantly reduce the swaying amplitude of hoisted heavy objects and reduce the risk of heavy objects falling; on the other hand, avoiding collisions between the boom and surrounding buildings, equipment or pipelines can prevent secondary risks such as equipment failure and pipeline leakage caused by collisions, while reducing safety threats to personnel in the work area, thus improving the overall safety of operations from three dimensions: "weight object safety", "equipment safety" and "personnel safety".

[0014] 2. This utility model, through the equidistant distribution of flow-blocking components and the design of no correlation between components, can bring the following advantages: Significantly reducing maintenance costs and time, and improving maintenance efficiency: The independent design of flow obstruction components and related gear components completely avoids the traditional maintenance dilemma of "replacing the entire system when a single component fails." When a flow obstruction component or gear component fails, it is not necessary to disassemble the entire buffer device or replace all similar components. Only the faulty component needs to be disassembled and replaced individually. This not only reduces the cost of purchasing spare parts for maintenance, but also significantly shortens maintenance time. Maintenance operations are simpler and less time-consuming, effectively reducing equipment maintenance costs and downtime for maintenance. Minimize resource waste and maximize resource utilization: The equidistant and independent design allows each flow-blocking component and gear to operate and be replaced independently. When a single component fails, other intact components continue to function normally, eliminating the need to discard the entire assembly due to a single failure. This fundamentally avoids the resource waste of having intact components discarded along with the failed ones. This design aligns with industry trends towards energy conservation and emission reduction, reduces unnecessary resource investment for enterprises, and improves resource utilization efficiency throughout the equipment's lifecycle. Attached Figure Description

[0015] Figure 1 This is an external view of the main structure of this utility model; Figure 2 These are structural diagrams of the spiral tube, main shell, and toothed components in this utility model. Figure 3 This is a structural disassembly diagram of the present utility model; Figure 4 This is a structural diagram of the main shell after it has been cut open in this utility model; Figure 5 These are structural diagrams of the annular groove, gear disk, spiral guide bar, toothed component, and flow obstruction component of this utility model. Figure 6 This is a half-section rear side view of the main shell in this utility model.

[0016] In the picture: 1. Rotary mechanism; 2. Hydraulic motor; 3. Hydraulic pipe; 4. Connecting pipe; 5. Spiral pipe; 6. Main shell; 7. Annular groove; 8. Gear disk; 9. Drive gear; 10. Spiral guide bar; 11. Square guide groove; 12. Toothed component; 13. Flow obstruction component; 14. Inner tube; 15. Auxiliary groove. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0019] Example: Please refer to Figures 1 to 6 As shown: A buffer device for a crane slewing mechanism 1 includes a slewing mechanism 1, a hydraulic motor 2 on one side of the slewing mechanism 1, a hydraulic pipe 3 fixedly connected through the hydraulic motor 2, a connecting pipe 4 on one side of the hydraulic pipe 3, a threaded pipe 5 at the outer end of the hydraulic pipe 3, a main body shell 6 on one side of the threaded pipe 5, an annular groove 7 inside the main body shell 6, a gear disk 8 rotatably connected inside the annular groove 7, drive teeth 9 fixedly connected at equal intervals on the inner annular wall of the main body shell 6, a spiral guide bar 10 fixedly connected to the gear disk 8, a square guide groove 11 equidistantly penetrating the outer annular wall of the main body shell 6, a toothed component 12 slidably connected inside the square guide groove 11, the teeth of the toothed component 12 being engaged in the gaps of the spiral guide bar 10, an inner tube 14 inside the main body shell 6, an auxiliary groove 15 equidistantly penetrating the inner tube 14, and a flow-blocking component 13 slidably connected inside the auxiliary groove 15.

[0020] in: Hydraulic pipe 3 is connected to the pump body and is used to regulate the flow rate of oil in the pipeline, thereby realizing the rotation of rotary mechanism 11.

[0021] Two spiral tubes 5 form a group, symmetrical on both sides of the main shell 6.

[0022] The main body shell 6 consists of two semi-circular shells, which are fixed together by screws.

[0023] The gear disk 8 is adapted to slide within the annular groove 7.

[0024] The drive gear 9 is driven by a drive motor; the teeth of the drive gear 9 are meshed with the teeth of the gear disk 8.

[0025] The teeth of the toothed component 12 are engaged in the gap of the spiral guide bar 10. When the spiral guide bar 10 rotates with the gear disk 8, the toothed component 12 will move during the relative position movement of the teeth and the gap. During this movement, the square guide groove 11 will provide guidance for the movement of the toothed component 12.

[0026] The spiral tube 5 and the inner tube 14 can be combined to form a hydraulic oil flow channel.

[0027] The auxiliary groove 15 is used for guiding and supporting the movement of the flow obstruction component 13.

[0028] Working principle: The working process of the crane's slewing mechanism 1 buffer device revolves around "hydraulic-driven slewing + mechanical linkage buffering," and proceeds in an orderly manner through four stages: "initial state → start-up operation → buffering adjustment → stop buffering," as detailed below: Phase 1: Initial State; Component Placement and Preparation The flow obstruction element 13 is initially placed in the auxiliary groove 15 of the inner tube 14 to maintain the basic flow cross section of the hydraulic oil channel in the inner tube 14, in preparation for subsequent flow rate adjustment.

[0029] The teeth of the toothed component 12 engage in the gap of the spiral guide bar 10 of the gear disk 8, and the toothed component 12 can slide freely in the square guide groove 11 of the main body shell 6.

[0030] The main body shell 6 is fixed by two semi-circular shells fastened together with screws. The screw tubes 5 are symmetrically distributed on both sides of the main body shell 6, forming a hydraulic oil flow channel together with the inner tube 14. One end of the hydraulic pipe 3 is connected to the pump body, and the other end is threaded to the screw tube 5, completing the initial assembly of the hydraulic system.

[0031] Phase Two: Start-up and Operation; Hydraulic Drive and Mechanical Linkage Hydraulic drive rotation: The pump body starts and delivers hydraulic oil to the system through the hydraulic pipe 3; the hydraulic oil flows along the channel formed by the solenoid 5 and the inner pipe 14, driving the hydraulic motor 2 to run, which in turn drives the slewing mechanism 1 to start horizontal slewing action, realizing the movement of the boom and the heavy object.

[0032] Mechanical synchronous linkage: At the same time, the drive motor starts and drives the drive gear 9 to rotate; because the teeth of the drive gear 9 mesh with the teeth of the gear disk 8, the drive gear 9 will drive the gear disk 8 to rotate synchronously in the annular groove 7 of the main body shell 6, providing a mechanical power basis for subsequent buffer adjustment.

[0033] Phase Three: Buffering and Adjustment; Active Speed ​​Control and Inertial Energy Absorption Mechanical structure driving adjustment: When the gear disk 8 rotates, the helical guide bar 10 fixed on it rotates together; since the teeth of the toothed component 12 are engaged in the gap of the helical guide bar 10, the rotation of the helical guide bar 10 will push the toothed component 12 to slide back and forth in the square guide groove 11 through tooth meshing, forming mechanical damping and initially absorbing the inertial force of the rotary mechanism 1.

[0034] Precise control of hydraulic flow rate: The flow obstruction component 13 slides in the auxiliary groove 15 with the flow of hydraulic oil and mechanical linkage action. By changing its position in the inner tube 14, it adjusts the flow cross section of the hydraulic oil (i.e., adjusts the "diameter of hydraulic pipe 3"). The change in cross section directly controls the flow rate of hydraulic oil, thereby regulating the drive speed of hydraulic motor 2, realizing the "active deceleration" of rotary mechanism 1, and avoiding instantaneous impact during start-up and shutdown.

[0035] Combined buffering takes effect: Mechanical damping (reciprocating sliding of toothed component 12) and hydraulic throttling (speed control of flow-blocking component 13) work together to absorb the inertial impact energy of the rotary mechanism 1 on the one hand, and reduce the rotation speed in advance on the other hand, solving the problem of "passively bearing impact" and making the buffering process more controllable.

[0036] Phase Four: Stop Buffering; Smooth Braking and Reset Deceleration to stop: When the rotary mechanism 1 approaches the predetermined position and needs to stop, the pump body reduces or stops delivering hydraulic oil; the flow obstruction 13 slides further in the direction of narrowing the hydraulic oil channel, increasing the oil flow resistance and significantly slowing down the speed of the hydraulic motor 2; at the same time, the toothed part 12 decreases with the speed of the spiral guide bar 10, the sliding amplitude decreases, the auxiliary gear disk 8 decelerates smoothly, and finally drives the rotary mechanism 1 to stop without impact.

[0037] Component reset: After stopping, the pump body stops supplying oil, the flow obstruction component 13 returns to its initial position in the auxiliary groove 15, and the toothed component 12 also returns to its initial engagement state as the spiral guide bar 10 stops. The entire device waits for the next start command to complete a complete "rotation buffer" cycle.

[0038] Please refer to the above work process. Figures 1 to 6 .

[0039] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0040] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A buffer device for a crane slewing mechanism, comprising a slewing mechanism (1), characterized in that: A hydraulic motor (2) is provided on one side of the rotary mechanism (1), and a hydraulic pipe (3) is fixedly connected through the hydraulic motor (2). A connecting pipe (4) is provided on one side of the hydraulic pipe (3), and a threaded pipe (5) is threaded to the outer end of the hydraulic pipe (3). A main body shell (6) is provided on one side of the threaded pipe (5).

2. A buffer device for a crane slewing mechanism according to claim 1, characterized in that: An annular groove (7) is provided inside the main body shell (6), and a gear disk (8) is rotatably connected inside the annular groove (7). Drive teeth (9) are fixedly connected at equal intervals on the inner annular wall of the main body shell (6).

3. A buffer device for a crane slewing mechanism according to claim 2, characterized in that: A spiral guide bar (10) is fixedly connected to the gear disk (8), and a square guide groove (11) is equidistantly connected to the outer ring wall of the main body shell (6). A toothed component (12) is slidably connected inside the square guide groove (11). The teeth of the toothed component (12) are engaged in the gap of the spiral guide bar (10).

4. A buffer device for a crane slewing mechanism according to claim 2, characterized in that: The main body shell (6) is provided with an inner tube (14), and auxiliary grooves (15) are provided on the inner tube (14) at equal intervals. A flow-blocking component (13) is slidably connected in the auxiliary groove (15).

5. A buffer device for a crane slewing mechanism according to claim 1, characterized in that: The two solenoids (5) are a group, symmetrical on both sides of the main shell (6).

6. A buffer device for a crane slewing mechanism according to claim 4, characterized in that: The main shell (6) consists of two semi-circular shells, which are fixed to the inner tube (14) by screwing and fastening.

7. A buffer device for a crane slewing mechanism according to claim 4, characterized in that: The spiral tube (5) and the inner tube (14) can be combined to form a channel through which hydraulic oil flows.

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