CN113233346A

CN113233346A - Slewing assembly, upper support of slewing assembly, slewing assembly component and tower crane

Info

Publication number: CN113233346A
Application number: CN202110432462.0A
Authority: CN
Inventors: 张鹏; 李桂芳; 钱建军
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd; Zoomlion Construction Crane Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd; Zoomlion Construction Crane Co Ltd
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-08-10
Anticipated expiration: 2041-04-21
Also published as: WO2022222526A1; CN113233346B

Abstract

The invention relates to the field of engineering machinery, and discloses a slewing assembly, an upper support thereof, a slewing assembly component and a tower crane, wherein the upper support (10) comprises a support main body, a first connecting structure which is arranged on one side of the support main body and used for connecting a cargo boom (50), and a second connecting structure which is arranged on the other side of the support main body and used for connecting a balance arm (60). This application can utilize the bottom of the root of upper bracket connection jib loading boom and balance arm to the total height of gyration assembly and tower head is the sum of the height of jib loading boom and the slewing bearing of gyration assembly, the height of undersetting basically, has reduced the height of upper bracket, thereby can satisfy transportation's limit for height requirement, makes gyration assembly and tower head transport together after can assembling.

Description

Slewing assembly, upper support of slewing assembly, slewing assembly component and tower crane

Technical Field

The invention relates to the field of engineering machinery, in particular to a rotary assembly, an upper support of the rotary assembly, a rotary assembly component and a tower crane.

Background

In the prior art, the top end and the bottom end of the root of a cargo boom and a balance arm of a tower crane are both connected to a tower head, the tower head is connected with an upper support of a rotation assembly, and a lower support of the rotation assembly is connected to a tower body. Therefore, the height of the portion above the slewing assembly is the sum of the height of the slewing assembly (the sum of the heights of the upper support, the slewing bearing and the lower support) and the height of the tower head (the height of the tower head basically corresponds to the height of the boom and the balance arm). During transition, the tower head and the slewing assembly need to be assembled and transported together, so that the transportation height limit can be exceeded (for example, the height of a road section passing through the transition can be limited to 4.5m, and the total height of the tower head and the slewing assembly cannot exceed 3.3m if the chassis of a transport vehicle is 1.2 m).

Therefore, the prior art has the problem that the tower head and the total height of the rotating assembly are ultrahigh and cannot be transported together during transition.

Disclosure of Invention

The invention aims to overcome the problem that a tower head and a rotary assembly cannot be transported together due to overhigh height in the prior art, and provides an upper support of the rotary assembly.

In order to achieve the above object, an aspect of the present invention provides an upper bracket of a slewing assembly, wherein the upper bracket includes a bracket main body, a first connecting structure provided at one side of the bracket main body for connecting a boom, and a second connecting structure provided at the other side of the bracket main body for connecting a balance arm.

Optionally, the first connecting structure includes a pair of first ear plates arranged in parallel, and the first ear plates are provided with first pin holes; the second connecting structure comprises a pair of second ear plates which are arranged in parallel, and second pin holes are formed in the second ear plates.

Optionally, the support main body comprises an upper cover plate, a lower cover plate and a surrounding cylinder connected with the upper cover plate and the lower cover plate, and the first ear plate and the second ear plate are fixed on the upper cover plate and the lower cover plate.

Optionally, a third connecting structure for connecting with a tower head is arranged at the top of the support main body.

Optionally, the first ear plate and the second ear plate include ear plate portions protruding from the upper cover plate, and the third connecting structure includes a third pin hole disposed on the ear plate portions.

The present application further provides a slewing assembly, wherein, slewing assembly includes upper bracket, undersetting and connect in the upper bracket with slewing bearing between the undersetting, the upper bracket is the upper bracket of the present application.

The present application further provides a slewing assembly component, wherein, the slewing assembly component includes the slewing assembly and the tower head of the present application, the tower head install in the upper bracket, the tower head has a fourth connection structure for connecting the jib loading boom and a fifth connection structure for connecting the balance arm.

Optionally, the tower head includes a truss structure, a triangular plate and a connecting beam, the triangular plate is mounted at the top of the truss structure, the connecting beam is mounted at the bottom of the truss structure, the fourth connecting structure is arranged at one vertex of the triangular plate, the fifth connecting structure is arranged at the other two vertices, and the connecting beam is connected to the upper support.

Optionally, the fourth connecting structure includes a third ear plate disposed at a vertex of the triangular plate, a fourth pin hole is disposed on the third ear plate, the fifth connecting structure includes a fourth ear plate disposed at another two vertices of the triangular plate, a fifth pin hole is disposed on the fourth ear plate, and a sixth pin hole is disposed on the connecting beam.

The present application further provides a tower crane, wherein, tower crane includes the gyration assembly subassembly, jib loading boom and balance arm of this application, the top and the bottom of the root of jib loading boom connect respectively in the fourth connection structure with first connection structure, the top and the bottom of the root of balance arm connect respectively in the fifth connection structure with the second connection structure.

Through the technical scheme, the upper support can be used for connecting the bottom ends of the roots of the cargo boom and the balance arm, so that the total height of the slewing assembly and the tower head is basically the sum of the height of the cargo boom, the height of the slewing bearing and the height of the lower support, the height of the upper support is reduced, the height limit requirement of traffic transportation can be met, and the slewing assembly and the tower head can be assembled and transported together.

Drawings

FIG. 1 is a perspective view of one embodiment of an upper support of the present application;

FIG. 2 is a schematic view of a swing assembly and structure at a tower head of one embodiment of a tower crane of the present application;

FIG. 3 is a perspective view of the tower head of FIG. 2;

fig. 4 is a schematic diagram illustrating the force applied to the first ear plate of the upper support in fig. 2.

Description of the reference numerals

10. An upper support; 11. a first ear plate; 111. a first pin hole; 12. a second ear panel; 121. a second pin hole; 13. an upper cover plate; 14. a lower cover plate; 15. a surrounding cylinder; 16. a third pin hole; 20. a tower head; 21. a truss structure; 211. a straight web member; 212. a diagonal web member; 213. a diagonal brace; 22. a set square; 23. connecting the cross beam; 231. a sixth pin hole; 24. a third ear panel; 241. a fourth pin hole; 25. a fourth ear panel; 251. a fifth pin hole; 30. a lower support; 40. a slewing bearing; 50. a cargo boom; 60. a balance arm; 70. a tower body; p1, a first pin; p2 and a second pin shaft; p3 and a third pin shaft; p4 and a fourth pin shaft; p5 and a fifth pin shaft.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

In the present invention, the use of directional terms such as "upper, lower, left, right" generally means upper, lower, left, right as viewed with reference to the accompanying drawings, unless otherwise specified; "inner and outer" refer to the inner and outer relative to the profile of the components themselves. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

According to an aspect of the present application, there is provided an upper bracket of a slewing assembly, wherein the upper bracket 10 includes a bracket body, a first connecting structure provided at one side of the bracket body for connecting a boom 50, and a second connecting structure provided at the other side of the bracket body for connecting a balance arm 60.

The upper support 10 of the present application can be used to connect the bottom ends of the root portions of the jib 50 and the balance arm 60, so that the total height of the slewing assembly and the tower head 20 is substantially the sum of the height of the jib 50 and the height of the slewing assembly slewing bearing 40 and the height of the lower support 30, and the height of the upper support 10, namely the height H (approximately 0.2m-0.4m) in fig. 2, is substantially reduced compared with the prior art, so that the height limit requirement of transportation can be met, and the slewing assembly and the tower head can be transported together after being assembled.

It is understood that in the present application, the height of the lift arm 50 (h2) and the height of the balance arm 60 (h1) need not be changed to reduce the heights, but the heights of the lift arm 50 and the balance arm 60 are very important parameters for the performance (strength, etc.) of the lift arm 50 and the balance arm 60. Therefore, in the present application, the total height (H 'in fig. 2) of the slewing assembly (the height of the slewing assembly is H3 in fig. 2) and the tower head (H') can be reduced while maintaining the performance of the crane arm 50 and the balance arm 60, and the requirement of traffic height limit can be met.

The first and second connecting structures may be provided in a corresponding manner as needed to connect the boom 50 and the balance arm 60. For example, the first connecting structure includes a pair of first ear plates 11 arranged in parallel, and the first ear plates 11 are provided with first pin holes 111; the second connecting structure comprises a pair of second ear plates 12 arranged in parallel, and a second pin hole 121 is formed in each second ear plate 12. The root portion of the lift arm 50 may be provided with a pin hole that mates with the first pin hole 111 to connect the root portion of the lift arm 50 to the first ear plate 11 via the first pin shaft P1. Similarly, the root of the balance arm 60 may be provided with a pin hole that mates with the second pin hole 121 to connect the root of the balance arm 60 to the second ear plate 12 via the second pin axis P2.

Wherein the first and

second ear plates

11, 12 can be arranged at appropriate positions of the bracket body for connecting the lifting arm 50 and the balance arm 60. Specifically, as shown in fig. 1, the holder body may include an upper cover plate 13, a lower cover plate 14, and a surrounding tube 15 connecting the upper cover plate 13 and the lower cover plate 14, and the first ear plate 11 and the second ear plate 12 are fixed to the upper cover plate 13 and the lower cover plate 14. The first ear plate 11 and the second ear plate 12 can be fixed to the upper cover plate 13 and the lower cover plate 14 by any suitable means, such as welding.

In addition, to facilitate the connection of the tower head 20, the top of the stand body may be provided with a third connection structure for connection with the tower head 20. Wherein a mounting member such as an ear plate may be separately provided on the top of the holder main body to provide the third connecting structure, and preferably, the third connecting structure may be provided by using the first and

second ear plates

11 and 12. Specifically, the first ear plate 11 and the second ear plate 12 may include ear plate portions protruding from the upper cover plate 13, and the third connecting structure includes a third pin hole 16 disposed on the ear plate portions. The tower head 20 may be provided with a pin hole that mates with the third pin hole 16 to connect to the first and

second ear plates

11, 12 via a third pin axis P3.

To facilitate the arrangement of the first and

second ear plates

11 and 12 so that the upper portions thereof can protrude from the upper cover plate 13, as shown in fig. 1, both side edges of the corresponding lift arm 50 and balance arm 60 of the upper and

lower cover plates

13 and 14 are provided with slots penetrating the upper and

lower cover plates

13 and 14, and the first and

second ear plates

11 and 12 can be arranged through the slots so as to protrude from the upper cover plate 13.

According to another aspect of the present application, a swing assembly is provided, wherein the swing assembly includes an upper support 10, a lower support 30, and a swing bearing 40 connected between the upper support 10 and the lower support 30, and the upper support is the upper support 10 of the present application. Through the gyration assembly of this application, can reduce the total height of gyration assembly and tower head 20 to satisfy the requirement of traffic limit for height. In use, the lower support 30 is attached to the top of the tower body 70 of a tower crane.

According to another aspect of the present application, there is provided a swing assembly, wherein the swing assembly comprises the swing assembly of the present application and a tower head 20, the tower head 20 is mounted to the upper base 10, and the tower head 20 has a fourth connecting structure for connecting a crane arm 50 and a fifth connecting structure for connecting a balance arm 60.

Through the slewing assembly component, the top end and the bottom end of the root part of the crane boom 50 can be respectively connected to one side of the tower head 20 and the upper support 10, and the top end and the bottom end of the root part of the balance arm 60 can be respectively connected to the other side of the tower head 20 and the upper support 10, so that the height of the part above the upper support 10 is equivalent to the height of the crane boom 50 and the balance arm 60, the total height of the slewing assembly component is reduced, and the requirement of traffic height limitation is met.

The tower head 20 may take on a variety of suitable configurations to mate with the upper support base 10 and connect the jib boom 50 and the counterweight arm 60. Specifically, as shown in fig. 3, the tower head 20 may include a truss structure 21, a triangular plate 22, and a connecting beam 23. Wherein the truss structure 21 may comprise a plurality of straight web members 211 and a plurality of diagonal web members 212 to form a lattice structure to obtain a desired structural strength. To facilitate the connection of the triangular plates 22, the truss structure 21 includes diagonal braces 213, the top ends of the diagonal braces 213 being adjacent to each other to form a triangle at the upper end of the truss structure 21 and a quadrilateral at the lower end.

Wherein, the top two ends of the tower head 20 can be connected to the crane arm 50 and the balance arm 60 respectively. Specifically, the triangular plate 22 is installed on the top of the truss structure 21, the fourth connecting structure is arranged at one vertex of the triangular plate 22, and the fifth connecting structure is arranged at the other two vertices. The bottom of the tower head 20 may be attached to the upper support 10. Specifically, the connecting beams 23 may be installed at the bottom of the truss structure 21 to connect the ends of the straight web members 211, the diagonal web members 212, and the diagonal braces 213. The tower head 20 can thereby be connected to the upper support 10 via the connecting cross member 23.

In addition, the first ear plate 11 and the second ear plate 12 are connected to the boom 50 and the balance arm 60, and connected to the tower head 20, so as to provide a more reasonable stress state, the positions of the corresponding pin holes on the first ear plate 11 and the second ear plate 12 can be set correspondingly. Specifically, as shown in fig. 4, the force F1 applied to the first pin hole 111 and the force F2 applied to the third pin hole 16 have portions that cancel each other out. That is, the first pin hole 111 is provided on the outer side of the first lug plate 11, and the third pin hole 16 of the first lug plate 11 is provided on the upper inner side of the first lug plate 11, so that F1 is in the horizontal direction, and F2 is in the oblique direction (the force receiving direction coincides with the extending direction of the diagonal web member 212) and has a horizontal component opposite to F1.

The fourth and fifth connecting structures may be provided as needed to connect the lift and balance

arms

50 and 60. Specifically, as shown in fig. 3, the fourth connecting structure may include a third ear plate 24 disposed at one vertex of the triangle 22, the third ear plate 24 is provided with a fourth pin hole 241, the fifth connecting structure includes a fourth ear plate 25 disposed at the other two vertices of the triangle 22, the fourth ear plate 25 is provided with a fifth pin hole 251, and the connecting beam 23 is provided with a sixth pin hole 231. The third ear plate 24 can be welded to the triangle 22 and the corresponding diagonal brace 213, and the fourth ear plate 25 can be welded to the triangle 22 and the corresponding straight web member 211 and diagonal web member 212. The top end of the root portion of the lift arm 50 may be provided with a pin hole corresponding to the fourth pin hole 241 so as to be connected to the third lug plate 24 by the fourth pin shaft P4. The tip of the root of the balance arm 60 may be provided with a pin hole corresponding to the fifth pin hole 251 so as to be connected to the fourth lug plate 25 by a fifth pin shaft P5. The sixth pin hole 231 may correspond to the above third pin hole 16 and be connected by a pin shaft.

According to another aspect of the present application, a tower crane is provided, wherein the tower crane includes the slewing assembly of the present application, a jib boom 50 and a balance arm 60, the top end and the bottom end of the root of the jib boom 50 are connected to the fourth connection structure and the first connection structure, respectively, and the top end and the bottom end of the root of the balance arm 60 are connected to the fifth connection structure and the second connection structure, respectively.

The tower crane can transport the rotation assembly as a whole in the transition process, and meets the requirement of traffic height limitation. When the tower crane is constructed, the top end and the bottom end of the root of the jib boom 50 may be connected to one side of the tower head 20 and the upper support 10, respectively, and the top end and the bottom end of the root of the balance arm 60 may be connected to the other side of the tower head 20 and the upper support 10, respectively.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications can be made to the technical solution of the invention. The present application includes the combination of individual features in any suitable manner. The invention is not described in detail in order to avoid unnecessary repetition. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims

1. An upper support of a slewing assembly is characterized in that the upper support (10) comprises a support main body, a first connecting structure arranged on one side of the support main body and used for connecting a crane boom (50), and a second connecting structure arranged on the other side of the support main body and used for connecting a balance arm (60).

2. The upper bracket of a swing assembly according to claim 1, wherein the first connecting structure comprises a pair of first ear plates (11) arranged in parallel, the first ear plates (11) being provided with first pin holes (111); the second connecting structure comprises a pair of second lug plates (12) which are arranged in parallel, and second pin holes (121) are formed in the second lug plates (12).

3. Upper support of a swivel assembly according to claim 2, wherein the support body comprises an upper cover plate (13), a lower cover plate (14) and a skirt (15) connecting the upper cover plate (13) and the lower cover plate (14), the first ear plate (11) and the second ear plate (12) being fixed to the upper cover plate (13) and the lower cover plate (14).

4. Upper support of a swivel assembly according to claim 3, wherein the top of the support body is provided with a third connection structure for connection with a tower head (20).

5. An upper bracket of a swing assembly according to claim 4, wherein the first lug plate (11) and the second lug plate (12) comprise lug plate portions protruding from the upper cover plate (13), and the third connecting structure comprises a third pin hole (16) provided in the lug plate portions.

6. A slewing assembly, characterized in that it comprises an upper support (10), a lower support (30) and a slewing bearing (40) connected between the upper support (10) and the lower support (30), the upper support being an upper support (10) according to any one of claims 1-5.

7. A swing assembly, characterized in that it comprises a swing assembly according to claim 6 and a tower head (20), said tower head (20) being mounted to said upper support (10), said tower head (20) having a fourth connection structure for connecting a jib (50) and a fifth connection structure for connecting a jib (60).

8. The swing assembly according to claim 7, wherein the tower head (20) comprises a truss structure (21), a triangular plate (22) and a connecting beam (23), the triangular plate (22) is mounted on the top of the truss structure (21), the connecting beam (23) is mounted on the bottom of the truss structure (21), the fourth connecting structure is arranged at one vertex of the triangular plate (22), the fifth connecting structure is arranged at the other two vertices, and the connecting beam (23) is connected to the upper support (10).

9. The swing assembly according to claim 8, wherein the fourth connecting structure comprises a third lug plate (24) arranged at one vertex of the triangular plate (22), a fourth pin hole (241) is arranged on the third lug plate (24), the fifth connecting structure comprises a fourth lug plate (25) arranged at the other two vertices of the triangular plate (22), a fifth pin hole (251) is arranged on the fourth lug plate (25), and a sixth pin hole (231) is arranged on the connecting cross beam (23).

10. A tower crane, characterized in that the tower crane comprises a slewing assembly as claimed in any one of claims 7-9, a jib (50) and a jib (60), the top and bottom of the root of the jib (50) being connected to the fourth connection structure and the first connection structure, respectively, and the top and bottom of the root of the jib (60) being connected to the fifth connection structure and the second connection structure, respectively.