A buffer mechanism for gantry crane
By adopting cylinder structure and damping parts in the cushioning mechanism of the gantry crane, the problem of reverse pushing of the vehicle body after sliding and buffering in bad weather is solved, and the effect of rapid static of the vehicle body is achieved, and safety and stability are improved.
Patent Information
- Application Number
- CN202420919758.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-29
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-04-29
AI Technical Summary
When the buffer mechanism of the existing gantry crane encounters severe weather such as strong winds and rains, the vehicle body is prone to slide on the track, resulting in safety accidents. The reverse push of the spring is difficult to make the vehicle body stop quickly.
A buffer mechanism with a cylinder-type structure is provided with a damping member on the inner cavity wall of the cylinder seat. The kinetic energy during the deformation recovery of the compression spring is weakened through the damping member, reducing the reverse direction of the piston rod to ensure that the vehicle body is stopped quickly after contacting the buffer mechanism.
It effectively weakens the kinetic energy during the deformation recovery of compression springs, reduces the reverse direction of the piston rod to the vehicle body, helps the vehicle body to stop quickly, and improves safety and stability.
Smart Images
Figure CN222702459U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gantry cranes, in particular to a buffer mechanism of a gantry crane. Background Art
[0002] Gantry crane is a variation of bridge crane. In ports, it is mainly used for loading and unloading of outdoor cargo yards, material yards, and bulk cargo. Its metal structure is like a door-shaped frame, with two legs installed under the main beam, which can walk directly on the track on the ground. Both ends of the main beam can have outward cantilever beams. Gantry cranes have the characteristics of high site utilization, large operating range, wide adaptability, and strong versatility, and are widely used in port cargo yards.
[0003] Since gantry cranes generally operate in the open air, when encountering severe weather such as strong winds and heavy rain, the body of the gantry crane is prone to slide on the track, causing safety accidents and endangering the safety of people and property. Therefore, anti-collision mechanisms are generally installed at the ends of the tracks.
[0004] A relatively simple way to prevent collision is to set up a spring buffer. However, it is found in actual use that although the spring can effectively alleviate the collision problem, the spring will release pressure after being compressed, and continue to push the gantry crane to move in the opposite direction. If the collision force is large, the gantry crane will easily produce continuous collision with gradually decreasing force under the action of external force factors and spring return elastic force, making it difficult for the vehicle body to quickly stop on the track. Utility Model Content
[0005] The purpose of the utility model is to propose a buffer mechanism for a gantry crane, which adopts a cylinder structure and is provided with a damping member on the inner wall of the cylinder seat to generate reverse resistance to the piston rod during the reciprocating sliding process, which can weaken the kinetic energy of the compression spring during deformation recovery and reduce the piston rod's push in the opposite direction of the vehicle body, which is conducive to the vehicle body coming to a rapid stop after contacting the buffer mechanism.
[0006] The technical solution adopted by the utility model is: a buffer mechanism of a gantry crane, comprising a gantry crane cross rail and cylinder seats fixed at both ends of the gantry crane cross rail;
[0007] The open end of one side of the cylinder seat is detachably connected to a cylinder cover, the inner cavity of the cylinder seat is provided with a piston rod that can move back and forth, the other end of the cylinder seat is provided with a through hole for the piston rod to pass through, and the outer end of the piston rod is connected to a pressure plate;
[0008] A ring seat is fixed in the middle of the piston rod, and a compression spring is sleeved on the outer side of the piston rod. One end of the compression spring is fixedly connected to the ring seat, and the other end is fixedly connected to the cylinder cover.
[0009] An extrusion seat is fixed on the piston rod and moves back and forth with the piston rod. A damping member is provided on the inner wall of the cylinder seat which can be twisted by the extrusion seat. An elastic retaining member is connected between the damping member and the cylinder seat to provide resistance when the extrusion seat squeezes the damping member and to restore the torsion of the damping member after the extrusion seat passes over the damping member.
[0010] As a preferred embodiment, the damping member includes a fixed column, a pendulum seat and a protrusion. The fixed column is fixed in the cylinder seat in a direction perpendicular to the piston rod. The fixed column passes through the axial hole in the middle of the pendulum seat. A protrusion is fixed on the side of the pendulum seat that can be squeezed into contact with the extrusion seat.
[0011] As a preferred solution, one end of the elastic retaining member is connected to the inner wall of the cylinder seat, and the other end is connected to a position of the pendulum seat deviating from the rotation center.
[0012] As a preferred solution, the elastic retaining member is a coil spring.
[0013] As a preferred solution, the cross section of the protrusion is triangular.
[0014] As a preferred solution, a shaft seat extending into the inner cavity of the cylinder seat is fixed on the cylinder head, and one end of the piston rod extends into the shaft hole of the shaft seat.
[0015] As a preferred solution, a ventilation nozzle is provided at the outer end of the shaft seat, a piston is provided at the end of the piston rod away from the pressure plate, and the inner cavity of the shaft seat between the ventilation nozzle and the piston is a ventilation cavity.
[0016] As a preferred solution, the extrusion seat is spindle-shaped, and has an axial hole at the center for the piston rod to pass through.
[0017] As a preferred solution, a track frame is fixed to the outer side of the cylinder seat, and the track frame is slidably connected to the pressure plate.
[0018] As a preferred solution, a rubber plate is fixed to the side surface of the pressure-bearing plate.
[0019] The beneficial effects of the utility model are:
[0020] Based on the defects of the prior art, a buffer mechanism of a gantry crane is provided. Compared with the existing buffer mechanism:
[0021] 1. A damping member is provided on the inner wall of the cylinder seat to generate reverse resistance to the extrusion seat during the reciprocating sliding process, which can weaken the kinetic energy of the compression spring during deformation recovery and reduce the push of the piston rod on the vehicle body in the opposite direction, which is conducive to the vehicle body coming to a rapid stop after contacting the buffer mechanism.
[0022] 2. When the vehicle body hits the pressure plate, the combination of the positioning spring and the compression spring produces a greater buffering force.
[0023] 3. When the piston rod recovers and resets with the deformation of the compression spring, the extrusion seat needs to pass over the swing seat with the piston rod. The protrusion gives the extrusion seat a torsion barrier through the positioning spring to buffer the reset of the piston rod and inhibit the reverse push;
[0024] 4. The track frame is easy to install and improves the stability of the pressure plate when it is hit by the vehicle body. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0026] Figure 1 It is a schematic diagram of the overall installation of the utility model;
[0027] Figure 2 It is a cross-sectional schematic diagram of a cylinder seat of the utility model in one state;
[0028] Figure 3 It is a cross-sectional schematic diagram of another state of the cylinder seat of the utility model;
[0029] Figure 4 for Figure 2 A magnified schematic diagram of the local structure;
[0030] Figure 5 This is a schematic diagram of the utility model after the track frame is installed;
[0031] Figure 6 It is a schematic diagram of the position of the pendulum seat of the utility model on the cross section of the cylinder seat.
[0032] Figure numerals: 1. cylinder seat, 2. cylinder head, 3. shaft seat, 4. piston rod, 5. through hole, 6. pressure plate, 7. ring seat, 8. extrusion seat, 9. compression spring, 10. fixing column, 11. swing seat, 12. protrusion, 13. positioning spring, 14. ventilation nozzle, 15. piston, 16. track frame, 17. rubber sheet, 18. gantry crane cross rail. DETAILED DESCRIPTION
[0033] The present invention is described in detail below by way of exemplary embodiments. However, it should be understood that, without further description, elements, structures and features in one embodiment may also be beneficially combined in other embodiments.
[0034] It should be noted that: unless otherwise defined, the technical terms or scientific terms used in this article should be understood by people with ordinary skills in the field to which the utility model belongs. The words "one", "an" or "the" and the like used in the patent application specification and claims of this utility model do not express quantitative restrictions, but indicate the existence of at least one; the "first", "second" and "third" used in this article should not be regarded as restrictions on the order of components, but are only used to distinguish different components; "include" or "comprise" and other similar words indicate that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, but do not exclude other elements or objects with the same function.
[0035] In order to more clearly describe the specific structural composition of the buffer mechanism of the gantry crane, Figure 1-6 Describe this embodiment:
[0036] like Figure 1 As shown, a buffer mechanism of a gantry crane comprises a gantry crane cross rail 18 and a cylinder seat 1 fixed at both ends of the gantry crane cross rail 18, a cylinder cover 2 is detachably connected to an open end on one side of the cylinder seat 1, a piston rod 4 which can move back and forth is provided in the inner cavity of the cylinder seat 1, a through hole 5 for the piston rod 4 to pass through is provided at the other end of the cylinder seat 1, a pressure plate 6 is connected to the outer end of the piston rod 4, a ring seat 7 is fixed to the middle part of the piston rod 4, a compression spring 9 is sleeved on the outer side of the piston rod 4, one end of the compression spring 9 is fixedly connected to the ring seat 7, and the other end is fixedly connected to the cylinder cover 2; a vehicle body (not shown in the figure) slides along the gantry crane cross rail 18, and the buffer mechanism is installed at both ends of the gantry crane cross rail 18, and when the vehicle body has a tendency to collide, it first contacts the pressure plate 6 and starts to buffer, and will not directly collide with the two ends of the gantry crane cross rail 18.
[0037] like Figure 2 or Figure 3 As shown, an extrusion seat 8 is fixed on the piston rod 4 and moves back and forth with the piston rod 4. The inner wall of the cylinder seat 1 is provided with a damping member that can be squeezed and twisted by the extrusion seat 8. An elastic retaining member 13 is connected between the damping member and the cylinder seat 1 to provide resistance when the extrusion seat 8 squeezes the damping member and to restore the damping member after the extrusion seat 8 passes over the damping member. During use, the pressure plate 6 pushes the piston rod 4 to move when it is subjected to the pressure of the vehicle body, and compresses the compression spring 9 to shorten, and the impact force is relieved by the compression spring 9. However, when the compression spring 9 is released, it will also generate a reverse thrust on the vehicle body, making it difficult for the vehicle body to stabilize quickly. In order to reduce the reverse push of the piston rod 4 on the vehicle body, a damping member that generates reverse resistance is provided on the inner wall of the cylinder seat 1, which can weaken the kinetic energy of the compression spring 9 when the deformation is restored. The main function is to reduce the reverse thrust, which is conducive to the vehicle body to quickly stop after contacting the buffer mechanism.
[0038] See also Figure 4 The specific structure of the damping member is as follows: it includes a fixed column 10, a pendulum seat 11 and a protrusion 12. The fixed column 10 is fixed in the cylinder seat 1 in a direction perpendicular to the piston rod 4. The fixed column 10 passes through the axial hole in the middle of the pendulum seat 11. A protrusion 12 that can be pressed and contacted with the extrusion seat 8 is fixed on the side of the pendulum seat 11. The cross-section of the protrusion 12 is triangular or arc-shaped. During use, the protrusion 12 is in a static state (such as Figure 2 or Figure 3 As shown in the figure, the extrusion seat 8 cannot pass through. As the extrusion seat 8 contacts and squeezes, the protrusion 12 and the swing seat 11 are twisted to an inclined angle. At this time, the extrusion seat 8 can pass over the position of the protrusion 12. When there is no pressure, the protrusion 12 and the swing seat 11 return to a static state under the action of the positioning spring 13. When the compression spring 9 is extended, the extrusion seat 8 needs to pass over the swing seat 11 with the piston rod 4, that is, from Figure 3 to Figure 2 In this process, the protrusion 12 rotates to the inclined state together with the pendulum seat 11 as it is squeezed, so that the extrusion seat 8 passes through, and the protrusion 12 gives the extrusion seat 8 a torsional barrier through the positioning spring 13, thereby restricting the movement of the piston rod 4 in the reverse direction; it should be noted that the spring force value of the compression spring 9 is greater than the spring force value of the positioning spring 13, so that when the compression spring 9 is extended, the extrusion seat 8 can push the protrusion 12 and the pendulum seat 11 to twist, thereby restoring to the state. Figure 2 The status shown;
[0039] like Figure 6 As shown, the damping members can be provided in multiple groups and installed on the inner wall of the cylinder base 1 around the piston rod 4 .
[0040] When the compression spring 9 is shortened (i.e., the pressure plate 6 is impacted by the vehicle body), the extrusion seat 8 needs to pass over the swing seat along with the piston rod 4, i.e., Figure 2 to Figure 3 state, during which the protrusion 12 rotates to an inclined state together with the swing seat 11 as it is squeezed, allowing the extrusion seat 8 to pass through. The protrusion 12 provides a torsional obstacle to the extrusion seat 8 through the positioning spring 13, thereby restricting the movement of the piston rod 4 in the reverse direction.
[0041] The positioning spring 13 restores the pendulum seat 11 to a stationary state, and the force exerted on the extrusion seat 8 is always opposite to the movement direction of the piston rod 4, playing a role of reverse inhibition and buffering.
[0042] like Figure 5 As shown, in order to reduce the noise generated when the pressure-bearing plate 6 is subjected to pressure, a rubber plate 17 is fixed to the side of the pressure-bearing plate 6 , and the vehicle body is in contact with the rubber plate 17 .
[0043] Specifically, the elastic retainer 13 can be a coil spring or a torsion spring, one end of which is connected to the inner wall of the cylinder seat 1, and the other end is connected to a position deviating from the rotation center of the pendulum seat 11. Two corresponding positioning springs 13 can be provided on each pendulum seat 11, and the tension or thrust of the positioning spring 13 needs to be overcome when the pendulum seat 11 is twisted.
[0044] See also Figure 3 A shaft seat 3 extending to the inner cavity of the cylinder seat 1 is fixed on the cylinder head 2, and one end of the piston rod 4 extends into the shaft hole of the shaft seat 3. A ventilation nozzle 14 is provided at the outer end of the shaft seat 3, and a piston 15 is provided at the end of the piston rod 4 away from the pressure plate 6. The inner cavity of the shaft seat 3 between the ventilation nozzle 14 and the piston 15 is a ventilation cavity. The inner diameter of the ventilation nozzle 14 is much smaller than the inner diameter of the ventilation cavity. When the piston rod 4 is displaced, the volume and pressure of the ventilation cavity are changed, and the hysteresis of the gas medium entering and exiting the ventilation nozzle 14 can suppress the displacement of the piston rod 4 to a certain extent.
[0045] like Figure 4 As shown, the extrusion seat 8 adopts a spindle-shaped structure with thin ends and a thick middle, and has an axial hole in the center for the piston rod 4 to pass through. This shape is conducive to the extrusion seat 8 to extrude smoothly and pass over the protrusion 12.
[0046] A track frame 16 is fixed to the outside of the cylinder base 1, and the track frame 16 is slidably connected to the pressure plate 6. The track frame is convenient for connection with the gantry crane cross rail, and at the same time improves the stability of the pressure plate 6 when it is hit by a vehicle body. Specifically, a guide rod can be fixed on the side of the pressure plate 6 that is not subject to force, and a guide hole is set on the track frame 16, and the guide rod passes through the guide hole.
[0047] The following is a complete description of the process of the gantry crane's buffer mechanism being impacted by the vehicle body:
[0048] See also Figure 2 or Figure 3 , the car body moves toward one end of the gantry crane cross rail 18, and the car body first contacts the pressure plate 6 (or rubber plate 17) under the action of inertia, pushing the pressure plate 6, the piston rod 4 and the ring seat 7, and the ring seat 7 squeezes and shortens the compression spring 9, and the impact force is relieved by the compression spring 9;
[0049] When the compression spring 9 is shortened, the extrusion seat 8 needs to pass over the swing seat 11 along with the piston rod 4, the extrusion seat 8 squeezes and pushes the protrusion 12 and the extrusion seat 11 to twist, and then passes over the position of the protrusion 12, from Figure 2 to Figure 3 In the state, the protrusion 12 provides a torsional resistance to the extrusion seat 11 through the positioning spring. At this time, the resistance directions of the compression spring 9 and the positioning spring 13 to the piston rod 4 are the same;
[0050] However, when the compression spring 9 is released, it will also generate a reverse thrust on the vehicle body. When the compression spring 9 is extended, the extrusion seat 8 needs to pass over the swing seat 11 with the piston rod 4, and the extrusion seat 8 squeezes and pushes the protrusion 12 and the extrusion seat 11 to twist, and then passes over the position of the protrusion 12, from Figure 3 to Figure 2In this state, the protrusion 12 provides a torsional barrier to the extrusion seat 8 through the positioning spring 13, and reversely restricts the movement of the piston rod 4. At this time, the directions of the forces applied to the piston rod 4 by the compression spring 9 and the positioning spring 13 are opposite. The positioning spring 13 deforms to absorb the thrust of the compression spring 9 on the vehicle body, so that the vehicle body can stabilize faster.
[0051] The parts not described in detail in this embodiment are prior art.
[0052] It should be noted that although the utility model is described through the above embodiments, the utility model can also have other multiple embodiments. Without departing from the spirit and scope of the utility model, it is obvious that those skilled in the art can make various corresponding changes and deformations to the utility model, but these changes and deformations should all fall within the scope of protection of the attached claims of the utility model and their equivalents.
Claims
1. A buffer mechanism for a gantry crane, characterized in that: It comprises a gantry crane cross rail (18) and a cylinder seat (1) fixed at both ends of the gantry crane cross rail (18); The open end of one side of the cylinder base (1) is detachably connected to a cylinder cover (2); a piston rod (4) that can reciprocate is provided in the inner cavity of the cylinder base (1); a through hole (5) for the piston rod (4) to pass through is provided at the other end of the cylinder base (1); and a pressure plate (6) is connected to the outer end of the piston rod (4); A ring seat (7) is fixed to the middle of the piston rod (4), a compression spring (9) is sleeved on the outer side of the piston rod (4), one end of the compression spring (9) is fixedly connected to the ring seat (7), and the other end is fixedly connected to the cylinder cover (2); A compression seat (8) is fixed on the piston rod (4) and reciprocates with the piston rod (4); a damping member that can be twisted by the compression seat (8) is provided on the inner wall of the cylinder seat (1); and an elastic retaining member (13) is connected between the damping member and the cylinder seat (1) for providing resistance when the compression seat (8) compresses the damping member and restoring the torsion of the damping member after the compression seat (8) passes over the damping member.
2. The buffer mechanism of a gantry crane according to claim 1, characterized in that: The damping member comprises a fixed column (10), a pendulum seat (11) and a protrusion (12). The fixed column (10) is fixed in the cylinder seat (1) in a direction perpendicular to the piston rod (4). The fixed column (10) passes through an axial hole in the middle of the pendulum seat (11). A protrusion (12) capable of being pressed into contact with the extrusion seat (8) is fixed on the side of the pendulum seat (11).
3. The buffer mechanism of a gantry crane according to claim 2, characterized in that: One end of the elastic retaining member (13) is connected to the inner cavity wall of the cylinder seat (1), and the other end is connected to a position of the pendulum seat (11) that is offset from the rotation center.
4. The buffer mechanism of a gantry crane according to claim 2, characterized in that: The elastic retaining member (13) is a coil spring.
5. The buffer mechanism of a gantry crane according to claim 2, characterized in that: The protrusion (12) has a triangular cross-section.
6. The buffer mechanism of a gantry crane according to claim 1, characterized in that: A shaft seat (3) extending into the inner cavity of the cylinder base (1) is fixed on the cylinder head (2), and one end of the piston rod (4) extends into the shaft hole of the shaft seat (3).
7. The buffer mechanism of a gantry crane according to claim 6, characterized in that: The outer end of the shaft seat (3) is provided with a ventilation nozzle (14), the end of the piston rod (4) away from the pressure plate (6) is provided with a piston (15), and the inner cavity of the shaft seat (3) between the ventilation nozzle (14) and the piston (15) is a ventilation cavity.
8. The buffer mechanism of a gantry crane according to claim 1, characterized in that: The extrusion seat (8) is spindle-shaped and has an axial hole at the center for the piston rod (4) to pass through.
9. The buffer mechanism of a gantry crane according to claim 1, characterized in that: A track frame (16) is fixed to the outer side of the cylinder seat (1), and the track frame (16) is slidably connected to the pressure plate (6).
10. The buffer mechanism of a gantry crane according to claim 1, characterized in that: A rubber plate (17) is fixed to the side surface of the pressure-bearing plate (6).