CN215626359U

CN215626359U - Arm head structure and crane

Info

Publication number: CN215626359U
Application number: CN202122223372.9U
Authority: CN
Inventors: 聂书才; 徐金
Original assignee: Sany America Inc
Current assignee: Sany America Inc
Priority date: 2021-09-14
Filing date: 2021-09-14
Publication date: 2022-01-25
Anticipated expiration: 2031-09-14

Abstract

The utility model relates to the technical field of engineering machinery, in particular to an arm head structure and a crane. The arm head structure includes: an arm head; the lifting pulley block comprises a left lifting pulley and a right lifting pulley, the left lifting pulley is rotatably arranged on the left side of the arm head, and the right lifting pulley is rotatably arranged on the right side of the arm head. According to the utility model, the left lifting pulley and the right lifting pulley are arranged on the left side and the right side of the arm head, so that the steel wire rope cannot interfere with the abdominal tube at the bottom of the truss arm, and the hoisting capacity of the arm frame is greatly improved.

Description

Arm head structure and crane

Technical Field

The utility model relates to the technical field of engineering machinery, in particular to an arm head structure and a crane.

Background

At present, a truss arm of a crane comprises an arm support and an arm head, wherein a pulley block on the arm head is positioned on the inner side of the arm support, the pulley block is symmetrically arranged relative to the central plane of the arm support, and a hook and the pulley block are correspondingly arranged on a vertical line. In order to avoid the interference between the steel wire rope positioned between the pulley block and the lifting hook and the abdominal tube at the bottom of the truss arm when the truss arm is hoisted at a large angle, the upper half abdominal tube at the bottom of the truss arm needs to be hollowed, and the hoisting capacity of the truss arm is greatly weakened.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide an arm head structure and a crane, and aims to solve the problem that the hoisting capacity of a truss arm is greatly weakened due to the fact that a belly pipe which interferes with a steel wire rope is hollowed when a pulley block is positioned on the inner side of the boom in the prior art.

To achieve the above object, the present invention provides an arm head structure comprising: an arm head; the lifting pulley block comprises a left lifting pulley and a right lifting pulley, the left lifting pulley is rotatably arranged on the left side of the arm head, and the right lifting pulley is rotatably arranged on the right side of the arm head.

Optionally, the arm head comprises two transverse pipes which are oppositely arranged, the two transverse pipes are arranged along the front and back direction of the arm head, each transverse pipe comprises a first pipe section, a second pipe section and a third pipe section which are sequentially connected, the outer diameter of the first pipe section and the outer diameter of the third pipe section are larger than that of the second pipe section, the wall thickness of the first pipe section and the wall thickness of the third pipe section are larger than that of the second pipe section, and the transverse pipes are suitable for being connected with the chord pipes of the middle arm.

Optionally, the arm head structure still includes the guide pulley group, and the guide pulley group includes left guide pulley and right guide pulley, and left guide pulley is rotatable to be set up in the left side of arm head, and right guide pulley is rotatable to be set up in the right side of arm head, and left lifting pulley corresponds with left guide pulley position in the left and right directions of arm head structure, and right lifting pulley corresponds with right guide pulley position in the left and right directions of arm head structure.

Optionally, the guide pulley block further comprises a middle guide pulley, the middle guide pulley is rotatably arranged on the arm head and located between the left guide pulley and the right guide pulley, the arm head structure further comprises a lengthening arm, the lengthening arm is connected with the arm head, the lengthening arm comprises a lengthening arm frame and a middle lifting pulley, and the middle lifting pulley is rotatably arranged on the lengthening arm frame and corresponds to the middle guide pulley in the left-right direction of the arm head structure.

Optionally, the lengthened arm support comprises a first arm support, a second arm support and a pulley seat, one end of the first arm support is connected with the pulley seat, the other end of the first arm support is connected with a part of the arm head close to the lifting pulley block, one end of the second arm support is connected with the pulley seat, and the other end of the second arm support is connected with a part of the arm head close to the guide pulley block.

Optionally, an ear plate is arranged on the arm head, and the other end of the first arm support is matched with the ear plate.

Optionally, a connecting plate is arranged on the arm head, and the other end of the second arm support is connected with the connecting plate through a pin shaft.

Optionally, the guide pulley block further comprises a guide pulley shaft on which the left guide pulley and the right guide pulley are mounted, and/or the lifting pulley block further comprises a lifting pulley shaft on which the left lifting pulley and the right lifting pulley are mounted.

Alternatively, there are three left and right lift sheaves, respectively.

The present invention also provides a crane comprising: the arm head structure is provided.

The technical scheme of the utility model has the following advantages: with left lifting pulley and right lifting pulley setting in the left side and the right side of arm head, wire rope can not take place to interfere with the binder pipe of the bottom of truss arm, has improved the hoist and mount ability of cantilever crane greatly.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 shows a partial perspective view of a crane according to an embodiment of the utility model;

fig. 2 shows a schematic front view of a part of the crane of fig. 1.

Description of reference numerals:

10. an arm head; 11. a transverse tube; 12. an ear plate; 20. a guide pulley block; 21. a left guide pulley; 22. a right guide pulley; 23. a middle guide pulley; 31. a left lifting pulley; 32. a right lifting pulley; 40. a lengthening arm; 41. lengthening the arm support; 411. a first arm support; 412. a second arm support; 413. a pulley seat; 42. a middle lifting pulley; 50. a middle arm.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 and 2, the arm head structure of the present embodiment includes: arm head 10 and lifting pulley group, lifting pulley group include left lifting pulley 31 and right lifting pulley 32, and left lifting pulley 31 rotatable setting is in the left side of arm head 10, and right lifting pulley 32 rotatable setting is in the right side of arm head 10.

The arm head structure of this embodiment is used, and left lifting pulley 31 and right lifting pulley 32 can be rotationally arranged on the left side and the right side of arm head 10, and steel wire rope can not interfere with the abdominal tube at the bottom of the truss arm, thereby greatly improving the hoisting capacity of the arm support.

It should be noted that the arm head structure is installed on the platform of the crane, when the driver sits in the cab, the left side of the left hand of the driver is located, the right side of the right hand of the driver is located, the side of the driver facing forward is located forward, the side behind the driver is located backward, and the lifting pulley block is located at the front side of the guide pulley block 20.

In the present embodiment, the arm head 10 includes two transverse pipes 11 disposed oppositely, the two transverse pipes 11 are arranged along the front and rear direction of the arm head 10, each transverse pipe 11 includes a first pipe section, a second pipe section and a third pipe section connected in sequence, the outer diameters of the first pipe section and the third pipe section are larger than that of the second pipe section, the wall thicknesses of the first pipe section and the third pipe section are larger than that of the second pipe section, and the transverse pipes 11 are suitable for being connected with the chord pipes of the middle arm 50. The two transverse pipes 11 are in dumbbell-shaped structures, so that the structural strength and stability of the arm heads are guaranteed, and weight reduction and cost reduction are both considered.

In this embodiment, the arm head structure further includes a guide pulley block 20, the guide pulley block 20 includes a left guide pulley 21 and a right guide pulley 22, the left guide pulley 21 is rotatably disposed on the left side of the arm head 10, the right guide pulley 22 is rotatably disposed on the right side of the arm head 10, the left lifting pulley 31 corresponds in position to the left guide pulley 21 in the left-right direction of the arm head structure, and the right lifting pulley 32 corresponds in position to the right guide pulley 22 in the left-right direction of the arm head structure. The left guide pulley 21 and the right guide pulley 22 are provided on the left and right sides of the arm head 10 and are provided corresponding to the left lifting pulley 31 and the right lifting pulley 32, and the left guide pulley 21 and the right guide pulley 22 serve as a guide.

In this embodiment, the guide pulley block 20 further includes a middle guide pulley 23, the middle guide pulley 23 is rotatably disposed on the arm head 10 and located between the left guide pulley 21 and the right guide pulley 22, the arm head structure further includes an extension arm 40, the extension arm 40 is connected with the arm head 10, the extension arm 40 includes an extension arm support 41 and a middle lifting pulley 42, and the middle lifting pulley 42 is rotatably disposed on the extension arm support 41 and corresponds to the middle guide pulley 23 in the left-right direction of the arm head structure. Wire rope's one end is fixed on the reel, and wire rope's the other end is walked around middle guide pulley 23 and middle lifting pulley 42 and is connected with the lifting hook, rotates through the reel and promotes the lifting hook or make the lifting hook descend, and middle guide pulley 23 makes the hoist have two hoist mechanism with the setting of extension arm 40, satisfies the different promotion collocation demand of customer.

In this embodiment, as shown in fig. 2, the lengthened arm support 41 includes a first arm support 411, a second arm support 412 and a pulley seat 413, one end of the first arm support 411 is connected to the pulley seat 413, the other end of the first arm support 411 is connected to a portion of the arm head 10 close to the lifting pulley block, one end of the second arm support 412 is connected to the pulley seat 413, and the other end of the second arm support 412 is connected to a portion of the arm head 10 close to the guide pulley block 20. The pulley seat 413 is convenient for installing the middle lifting pulley 42, and the first arm frame 411 and the second arm frame 412 are used for supporting the pulley seat 413, so that the supporting is more stable.

In this embodiment, the arm head 10 is provided with an ear plate 12, and the other end of the first arm frame 411 is matched with the ear plate 12, so that the connection is simple. The ear plate 12 is provided with a chute, and the lengthened arm support 41 can be scratched into the chute under the action of gravity to lift a heavy object; when the arm transportation of lying prone of arm head, the extension arm can break away from the spout voluntarily under the supporting role on ground, reduces the transportation height.

In this embodiment, a connecting plate is disposed on the arm head 10, and the other end of the second arm support 412 is connected to the connecting plate through a pin, so as to facilitate connection.

In this embodiment, as shown in fig. 1, the guide pulley block 20 further includes a guide pulley shaft, and the left guide pulley 21 and the right guide pulley 22 are mounted on the guide pulley shaft. The guide pulley shaft facilitates installation of the left guide pulley 21 and the right guide pulley 22. An intermediate guide pulley 23 is also mounted on the guide pulley shaft.

In this embodiment, the lifting pulley block further comprises a lifting pulley shaft, on which the left lifting pulley 31 and the right lifting pulley 32 are mounted. The lift pulley shaft facilitates mounting of the left lift pulley 31 and the right lift pulley 32.

In the present embodiment, three left lifting pulleys 31 and three right lifting pulleys 32 are provided, and the outermost left lifting pulley 31 and the outermost right lifting pulley 32 are provided corresponding to the left guide pulley 21 and the right guide pulley 22, respectively.

The present invention also provides a crane, comprising: the arm head structure is provided.

In this embodiment, the crane further includes a truss arm and a platform, the truss arm includes a lower arm, a middle arm 50 and an arm head that are connected in sequence, the lower arm is hinged on the platform, and the arm head is provided with a guide pulley block 20, a lifting pulley block and a lengthening arm 40.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

1. the arm head structure includes arm head 10, guide pulley block 20, promote the assembly pulley and lengthen arm 40, the left and right sides symmetrical arrangement at the rear portion of arm head 10 has guide pulley, a guide pulley is arranged in the centre at the rear portion of arm head 10, three promotion pulley is respectively arranged to the anterior left and right sides of arm head, the promotion pulley in the outside corresponds the setting with guide pulley, the promotion pulley and the guide pulley of the left and right sides have avoided wire rope and the binder of truss arm bottom to take place the condition of interfering, more traditional arm head has higher lifting capacity, the problem of having solved wire rope and truss arm bottom's binder and taking place the interference has improved the hoist and mount ability of cantilever crane greatly.

2. The extension arm 40 has a lifting pulley corresponding to the guide pulley in the middle, the extension arm is connected to the arm head by an ear plate and a pin, the load of the arm head is mainly transmitted downward through the main chord tube of the middle arm, and the abdominal tube of the middle arm is relatively less stressed. The ear plate 12 is provided with a chute, and the lengthened arm support 41 can be scratched into the chute under the action of gravity to lift a heavy object; when the arm transportation of lying prone of arm head, the extension arm can break away from the spout voluntarily under the supporting role on ground, reduces the transportation height.

3. The two transverse pipes 11 connected with the main chord pipes of the arm heads 10 and the middle arms adopt a dumbbell-shaped structure with strong two sides and weak middle, so that the strength and stability of the arm head structure are ensured, and the characteristics of weight reduction and cost reduction of the arm support are considered.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. An arm head structure, comprising:

an arm head (10);

the lifting pulley block comprises a left lifting pulley (31) and a right lifting pulley (32), the left lifting pulley (31) can be rotatably arranged on the left side of the arm head (10), and the right lifting pulley (32) can be rotatably arranged on the right side of the arm head (10).

2. The arm head structure according to claim 1, characterized in that the arm head (10) comprises two oppositely arranged transverse tubes (11), the two transverse tubes (11) are arranged along the front and back direction of the arm head (10), each transverse tube (11) comprises a first tube section, a second tube section and a third tube section which are connected in sequence, the outer diameter of the first tube section and the third tube section is larger than that of the second tube section, the wall thickness of the first tube section and the third tube section is larger than that of the second tube section, and the transverse tubes (11) are suitable for being connected with chord tubes of the middle arm (50).

3. The arm head structure according to claim 1, characterized in that the arm head structure further comprises a guide pulley block (20), the guide pulley block (20) comprises a left guide pulley (21) and a right guide pulley (22), the left guide pulley (21) is rotatably disposed at the left side of the arm head (10), the right guide pulley (22) is rotatably disposed at the right side of the arm head (10), the left lifting pulley (31) and the left guide pulley (21) are in position correspondence in the left-right direction of the arm head structure, and the right lifting pulley (32) and the right guide pulley (22) are in position correspondence in the left-right direction of the arm head structure.

4. The arm head structure of claim 3, characterized in that the guide pulley block (20) further comprises a middle guide pulley (23), the middle guide pulley (23) is rotatably disposed on the arm head (10) and located between the left guide pulley (21) and the right guide pulley (22), the arm head structure further comprises an extension arm (40), the extension arm (40) is connected with the arm head (10), the extension arm (40) comprises an arm extension arm (41) and a middle lifting pulley (42), and the middle lifting pulley (42) is rotatably disposed on the extension arm (41) and corresponds to the middle guide pulley (23) in the left-right direction of the arm head structure.

5. The arm head structure of claim 4, characterized in that the extension arm support (41) comprises a first arm support (411), a second arm support (412) and a pulley seat (413), wherein one end of the first arm support (411) is connected to the pulley seat (413), the other end of the first arm support (411) is connected to the portion of the arm head (10) close to the lifting pulley block, one end of the second arm support (412) is connected to the pulley seat (413), and the other end of the second arm support (412) is connected to the portion of the arm head (10) close to the guide pulley block (20).

6. The arm head structure of claim 5, characterized in that the arm head (10) is provided with an ear plate (12), and the other end of the first arm support (411) is matched with the ear plate (12).

7. The arm head structure of claim 5, characterized in that the arm head (10) is provided with a connecting plate, and the other end of the second arm support (412) is connected with the connecting plate through a pin shaft.

8. The arm head structure according to claim 3, characterized in that the guide pulley block (20) further comprises a guide pulley shaft on which the left guide pulley (21) and the right guide pulley (22) are mounted, and/or in that the lifting pulley block further comprises a lifting pulley shaft on which the left lifting pulley (31) and the right lifting pulley (32) are mounted.

9. The arm head structure according to claim 1, characterized in that there are three of the left lifting sheave (31) and the right lifting sheave (32), respectively.

10. A crane, comprising: the arm head structure of any one of claims 1 to 9.