Support damper for a tower crane

Abstract

The utility model relates to a kind of tower crane support shock absorber, comprising: bottom plate (1), annular groove is provided on bottom plate (1), the inside of metal sleeve (12) is provided with annular bending ring (1201), bending ring (1201) is set into annular groove;Elastic wear layer (5) is provided on bottom plate (1) inside metal sleeve (12), and the conical space is formed in elastic wear layer (5) inside, and pressure sleeve (6) is provided on the upper portion of elastic wear layer (5);Metal sleeve (12) further includes the curved bottom (1201) of connecting bending ring (1201), curved bottom (1201) is formed annular cavity by arching upwards on bottom plate (1), further include the metal sleeve outer wall of connecting curved bottom (1201);Damping mechanism is provided between metal sleeve outer wall and elastic wear layer (5).The device can be applied to tower crane support as shock absorber.

Description

Technical Field

[0001] This utility model relates to a shock absorber, specifically a shock absorber for a tower crane support. Background Technology

[0002] A tower crane, also known as a tower hoist, originated in Western Europe. It is a rotating crane with its boom mounted on a tall tower. It offers a large working space and is mainly used for the vertical and horizontal transport of materials and the installation of building components in construction. It consists of three main parts: the metal structure, the working mechanism, and the electrical system. The metal structure includes the tower, boom, and base. The working mechanism comprises four parts: hoisting, luffing, slewing, and traveling. The electrical system includes motors, controllers, distribution cabinets, wiring, signaling, and lighting devices.

[0003] Tower cranes typically consist of multiple steel structural components connected by foundations, such as standard sections. These standard sections are connected to the tower crane base, and the standard sections are interconnected. The connection between the standard sections and the tower crane base usually requires connecting brackets. In existing technologies, vibration damping bases are often installed on the brackets. For example, CN216072795U has four vibration damping pads on the connecting brackets. However, these vibration damping pads only rely on vulcanized rubber inside for vibration damping, resulting in weak vibration damping effect and poor performance in high-vibration working environments. Utility Model Content

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a tower crane support shock absorber with good shock absorption effect.

[0005] The technical solution of this utility model is as follows: A shock absorber for a tower crane support, characterized in that it comprises: The base plate (1) has an annular groove, and the metal sleeve (12) has an annular bending ring (1201) inside, which is disposed in the annular groove. An elastic wear-resistant layer (5) is provided on the base plate (1) inside the metal sleeve (12). A conical space is formed inside the elastic wear-resistant layer (5), and a pressure sleeve (6) is provided on the upper part of the elastic wear-resistant layer (5). The metal sleeve (12) also includes a curved bottom (1202) that connects to the bending ring (1201), the curved bottom (1202) arches upward on the base plate (1) to form an annular cavity, and also includes the outer wall of the metal sleeve that connects to the curved bottom (1202); A shock-absorbing mechanism is provided between the outer wall of the metal sleeve and the elastic wear-resistant layer (5).

[0006] Furthermore, the pressure sleeve (6) includes an upper pressure plate and a pressure platform located below the pressure plate, the pressure platform being in the shape of a frustum.

[0007] Furthermore, an upper spring groove (4) is provided at the bottom of the pressure table, and a lower spring groove (2) is provided on the bottom plate (1) inside the elastic wear-resistant layer (5). A first spring (3) is provided between the upper spring groove (4) and the lower spring groove (2).

[0008] Furthermore, a guide post is provided at the lower part of the upper spring groove (4), and a guide sleeve is provided at the upper part of the lower spring groove (2), with the guide post at least partially located in the guide sleeve.

[0009] Furthermore, the shock absorption mechanism includes a third rubber layer (11), a second metal plate (10), a second rubber layer (9), a first metal plate (8), and a first rubber layer (7) sequentially disposed between the outer wall of the metal sleeve and the elastic wear-resistant layer (5).

[0010] Furthermore, the first metal plate (8) is provided with a plurality of first partitions extending into the first rubber layer (7) at equal intervals, and the second metal plate (10) is provided with a plurality of second partitions extending into the second rubber layer (9) at equal intervals.

[0011] Furthermore, the angle between the first partition and the first metal plate (8) is 30°-60°; the angle between the second partition and the second metal plate (10) is 30°-60°. Furthermore, the first metal plate (8) is provided with a plurality of third partitions extending into the interior of the second rubber layer (9) at equal intervals, and the second metal plate (10) is provided with a plurality of fourth partitions extending into the interior of the third rubber layer (11) at equal intervals.

[0012] Furthermore, the annular cavity contains a series of second springs (14) arranged in a transformation array.

[0013] Furthermore, the pressure plate of the pressure sleeve (6) is provided with a plurality of mounting posts (13).

[0014] By means of the above solution, this utility model has at least the following advantages: The system employs a four-level energy dissipation system consisting of a spring, a three-layer rubber-metal composite, and a curved bottom spring. This system can simultaneously cover high-frequency micro-vibrations, medium-load impacts, and extreme large deformations. The vibration reduction efficiency is more than 60% higher than that of a single-layer rubber pad, effectively suppressing tower crane swaying and structural resonance.

[0015] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show a certain embodiment of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a cross-sectional view of the present invention. Figure 1 ; Figure 3 This is a cross-sectional view of the present invention. Figure 2 ; In the diagram: 1-Base plate; 2-Lower spring groove; 3-First spring; 4-Upper spring groove; 5-Wear-resistant rubber layer; 6-Pressure sleeve; 7-First rubber layer; 8-First metal plate; 9-Second rubber layer; 10-Second metal plate; 11-Third rubber layer; 12-Metal sleeve; 1201-Bending ring; 1202-Curved bottom; 13-Mounting post; 14-Second spring. Detailed Implementation

[0018] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0019] See Figures 1-3 The preferred embodiment of this utility model describes a tower crane support shock absorber, which is installed at the four corners of the lower part of the support to provide shock absorption for the support.

[0020] The shock absorber in this utility model specifically includes a base plate 1, which is circular and made of Q345B low alloy high strength steel. After quenching and tempering, the yield strength is ≥345 MPa. The surface is hot-dip galvanized to 80μm or sprayed with aluminum to 150μm to meet the C4 environment corrosion protection requirements.

[0021] An annular groove is provided on the base plate 1. The depth of the annular groove is half the thickness of the base plate 1, and its depth is usually 10-20mm.

[0022] The metal sleeve 12 is installed on the base plate 1. The metal sleeve 12 is the housing part of the entire shock absorber. Specifically, it includes an annular bending ring 1201 inside, which is set in an annular groove. The metal sleeve 12 also includes a curved bottom 1201 connected to the bending ring 1201. The curved bottom 1201 arches upward on the base plate 1 to form an annular cavity. It also includes an outer wall of the metal sleeve connected to the curved bottom 1201. The outer wall of the metal sleeve and the base plate 1 only contact each other and are not fixedly connected. During the deformation of the curved bottom 1201, the outer wall of the metal sleeve can slide relative to the base plate 1.

[0023] An elastic wear-resistant layer 5, typically made of hydrogenated nitrile rubber, is provided on the base plate 1 inside the metal sleeve 12. A conical space is formed inside the elastic wear-resistant layer 5, and a pressure sleeve 6 is provided on top of the elastic wear-resistant layer 5. A shock-absorbing mechanism is provided between the outer wall of the metal sleeve and the elastic wear-resistant layer 5. The shock-absorbing mechanism supports the elastic wear-resistant layer 5. During downward pressure, the pressure sleeve 6 compresses the elastic wear-resistant layer 5, allowing it to move downwards to further compress the shock-absorbing mechanism. The vibration of the pressure sleeve 6 is thus absorbed through the damping effect of the shock-absorbing mechanism.

[0024] In this utility model, the pressure sleeve 6 includes an upper pressure plate and a pressure platform located below the pressure plate. The pressure platform is in the shape of a frustum, and the pressure sleeve 6 is for the upper support to contact.

[0025] The bottom of the pressure table is provided with an upper spring groove 4, and the bottom plate 1 is provided with a lower spring groove 2 located inside the elastic wear-resistant layer 5. A first spring 3 is provided between the upper spring groove 4 and the lower spring groove 2. A guide post is provided at the lower part of the upper spring groove 4, and a guide sleeve is provided at the upper part of the lower spring groove 2. The guide post is at least partially located in the guide sleeve. The function of the guide post and the guide sleeve is to limit the movement of the pressure table to the vertical direction, and the first spring 3 can play a role in shock absorption.

[0026] The shock absorption mechanism includes a third rubber layer 11, a second metal plate 10, a second rubber layer 9, a first metal plate 8, and a first rubber layer 7 arranged sequentially between the outer wall of the metal sleeve and the elastic wear-resistant layer 5. The first metal plate 8 is provided with a plurality of first partitions extending into the interior of the first rubber layer 7 at equal intervals, and the second metal plate 10 is provided with a plurality of second partitions extending into the interior of the second rubber layer 9 at equal intervals.

[0027] The angle between the first partition and the first metal plate 8 is 30°-60°; the angle between the second partition and the second metal plate 10 is 30°-60°. Specific angles can be found in the accompanying drawings. Multiple third partitions extending into the second rubber layer 9 are equidistantly spaced on the first metal plate 8, and multiple fourth partitions extending into the third rubber layer 11 are equidistantly spaced on the second metal plate 10. The partitions provide better support for the rubber layers; however, there is a risk of tearing at the point where the partition ends contact the rubber. The upward-extending angle of the partitions prevents tearing at the point where the partition ends contact the rubber.

[0028] The annular cavity is arranged in a transformation array with multiple second springs 14. The second springs 14 can support the annular cavity. This is used when the entire device is subjected to a large impact. When a large impact force is received, the pressure sleeve 6 will move downward with a large stroke. The pressure sleeve 6 will continue to squeeze downward. At this time, the squeezing force will be transmitted to the curved bottom 1202, which will force the curved bottom 1202 to deform, that is, the top of the curved bottom 1202 will move downward. At this time, the second springs 14 can provide support force to the top of the curved bottom 1202 and also help to dissipate the force at the top of the curved bottom 1202, further realizing the shock absorption effect.

[0029] The pressure plate of the pressure sleeve 6 is provided with multiple mounting posts 13, which are used to connect to or position the upper bracket.

[0030] The technical principle of this device is as follows: This invention reduces the vertical and horizontal impact loads of the tower crane layer by layer through four energy dissipation paths, and provides secondary stiffness and restoring force under extreme displacement.

[0031] The specific process is as follows: The tower crane's own weight and lifting load are transmitted downward through the pressure plate of the pressure sleeve 6. After the first spring 3 is compressed, the initial filtering of high-frequency small-amplitude vibration is achieved. Then the pressure plate enters the conical space of the elastic wear-resistant layer 5, and through the wedge action of the conical surface, part of the horizontal force is converted into circumferential tension, which suppresses lateral displacement.

[0032] The multi-stage rubber-metal composite energy dissipation process allows residual energy to continue radially outward, passing sequentially through the first rubber layer 7 → the first metal plate 8 → the second rubber layer 9 → the second metal plate 10 → the third rubber layer 11. Each rubber layer generates hysteretic energy dissipation under shear and compression coupling, while the metal partitions, through a 30°–60° bevel angle, form an interlocking structure that enhances the tear resistance of the interface.

[0033] The curved bottom provides secondary stiffness and reset. When the impact load exceeds the set threshold, the pressure sleeve 6 moves downward in its large stroke, pushing the curved bottom 1202 of the metal sleeve 12 to arch downward, compressing the second spring 14 in the annular cavity. The arched geometry of the curved bottom 1202 generates nonlinear hardening characteristics during deformation, providing secondary stiffness to the system and preventing bottoming out failure. After the impact is unloaded, the second spring 14 and the first spring 3 work together to achieve rapid reset.

[0034] This device has the following advantages: The system employs a four-level energy dissipation system consisting of a spring, a three-layer rubber-metal composite, and a curved bottom spring. This system can simultaneously cover high-frequency micro-vibrations, medium-load impacts, and extreme large deformations. The vibration reduction efficiency is more than 60% higher than that of a single-layer rubber pad, effectively suppressing tower crane swaying and structural resonance.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A shock absorber for a tower crane support, characterized in that, include: The base plate (1) has an annular groove, and the metal sleeve (12) has an annular bending ring (1201) inside, which is disposed in the annular groove. An elastic wear-resistant layer (5) is provided on the base plate (1) inside the metal sleeve (12). A conical space is formed inside the elastic wear-resistant layer (5), and a pressure sleeve (6) is provided on the upper part of the elastic wear-resistant layer (5). The metal sleeve (12) also includes a curved bottom (1202) that connects to the bending ring (1201), the curved bottom (1202) arches upward on the base plate (1) to form an annular cavity, and also includes the outer wall of the metal sleeve that connects to the curved bottom (1202); A shock-absorbing mechanism is provided between the outer wall of the metal sleeve and the elastic wear-resistant layer (5).

2. The tower crane support shock absorber according to claim 1, characterized in that, The pressure sleeve (6) includes an upper pressure plate and a pressure platform located below the pressure plate, the pressure platform being in the shape of a frustum.

3. The tower crane support shock absorber according to claim 2, characterized in that, The bottom of the pressure table is provided with an upper spring groove (4), and the bottom plate (1) is provided with a lower spring groove (2) located inside the elastic wear-resistant layer (5). A first spring (3) is provided between the upper spring groove (4) and the lower spring groove (2).

4. The tower crane support shock absorber according to claim 3, characterized in that, The upper spring groove (4) is provided with a guide post at the lower part, and the lower spring groove (2) is provided with a guide sleeve at the upper part, with the guide post at least partially located in the guide sleeve.

5. The tower crane support shock absorber according to claim 1, characterized in that, The shock absorption mechanism includes a third rubber layer (11), a second metal plate (10), a second rubber layer (9), a first metal plate (8), and a first rubber layer (7) arranged sequentially between the outer wall of the metal sleeve and the elastic wear-resistant layer (5).

6. The tower crane support shock absorber according to claim 5, characterized in that, The first metal plate (8) is provided with a plurality of first partitions extending into the first rubber layer (7) at equal intervals, and the second metal plate (10) is provided with a plurality of second partitions extending into the second rubber layer (9) at equal intervals.

7. The tower crane support shock absorber according to claim 6, characterized in that, The angle between the first partition and the first metal plate (8) is 30°-60°; the angle between the second partition and the second metal plate (10) is 30°-60°.

8. The tower crane support shock absorber according to claim 6, characterized in that, The first metal plate (8) is provided with a plurality of third partitions that extend into the second rubber layer (9) at equal intervals, and the second metal plate (10) is provided with a plurality of fourth partitions that extend into the third rubber layer (11) at equal intervals.

9. The tower crane support shock absorber according to claim 1, characterized in that, The annular cavity contains a transformation array with multiple second springs (14).

10. The tower crane support shock absorber according to claim 2, characterized in that, The pressure plate of the pressure sleeve (6) is provided with multiple mounting posts (13).

Images