CN220201234U

CN220201234U - Goose head arm

Info

Publication number: CN220201234U
Application number: CN202321695411.8U
Authority: CN
Inventors: 刘栋; 朱发浩; 宋世全; 韩雷
Original assignee: Construction Machinery Branch of XCMG
Current assignee: Construction Machinery Branch of XCMG
Priority date: 2023-06-30
Filing date: 2023-06-30
Publication date: 2023-12-19
Anticipated expiration: 2033-06-30

Abstract

The utility model discloses a gooseneck boom, which comprises a main boom section, wherein the main boom section comprises a first upper chord member and a first lower chord member; the gooseneck boom arm section comprises a second upper chord member and a second lower chord member, wherein the second upper chord member is connected with the first upper chord member through a pin shaft, the second lower chord member is connected with the first lower chord member through a mutually clamped gooseneck boom side butt joint and a main boom side butt joint.

Description

Goose head arm

Technical Field

The utility model relates to a gooseneck boom, and belongs to the technical field of crawler cranes.

Background

The crawler crane is mechanical equipment which adopts a crawler walking chassis and can lift heavy objects to a certain height. The crawler crane mainly comprises a lower crane, an upper crane and a boom system, wherein the boom can be divided into a main boom, an auxiliary boom, a mast, a bracket and the like according to the action. The goose head arm in this scheme has increased hoist and mount radius on the basis of original main arm, has promoted the volume of liftable object than main arm head.

The existing gooseneck boom is connected with the main boom through 4 pin shafts on the main boom, wherein the joint of the upper boom is a closed joint, the joint of the lower boom is an open joint, the constraint mode of the original closed joint, which is used for limiting the linear motion at the hinged position, is adjusted to be capable of moving along the joint opening to the plane in the fixed direction, the upper joint and the lower joint are connected by the pin shafts, the stress at the joint is larger, the material strength requirements on the joint and the pin shafts are very high, and the manufacturing and using cost of the gooseneck boom is greatly improved.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art, and provides the gooseneck boom, which reduces the requirement on the strength of materials at the joint by reasonably applying the stress condition of the materials, thereby reducing the manufacturing and using cost.

In order to achieve the above purpose, the utility model is realized by adopting the following technical scheme:

in a first aspect, the present utility model provides a gooseneck boom comprising:

a main arm segment comprising a first upper chord and a first lower chord;

the goose head arm section comprises a second upper chord member and a second lower chord member, the second upper chord member is connected with the first upper chord member through a pin shaft, and the second lower chord member is connected with the first lower chord member through a goose head arm side butt joint and a main arm side butt joint which are mutually clamped.

Further, the second upper chord member is rotatably connected with the first upper chord member.

Further, a main arm connecting rod is arranged on the first upper chord member, a gooseneck connecting rod is arranged on the second upper chord member, and the main arm connecting rod is connected with the gooseneck connecting rod through a pin shaft.

Further, the main arm connecting rod is composed of two connecting rods with pin holes, the gooseneck arm connecting rod is located between the two connecting rods with the pin holes, through holes corresponding to the pin holes are formed in the gooseneck arm connecting rod, and the pin shafts sequentially penetrate through the pin holes and the through holes to fix the main arm connecting rod and the gooseneck arm connecting rod.

Furthermore, the goose head arm side butt joint is of a square structure, and clamping blocks and clamping grooves are respectively arranged on two sides of the surface of the goose head arm side butt joint, which is positioned at opposite angles.

Furthermore, a gap is arranged between two adjacent clamping blocks on the butt joint of the side of the gooseneck boom.

Further, the main arm side butt joint and the gooseneck arm side butt joint have the same structure.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model provides a gooseneck boom, which only bears pressure at the joint of the lower chord member of the gooseneck boom, so that a pin shaft is removed, the contact is changed into planar contact, the contact area is increased, the contact stress is greatly reduced, the same load is reduced, and the requirement of external force on the joint of the gooseneck boom is reduced.

2. The utility model provides a goose head arm, which reduces manufacturing and using cost and saves working hours after a pin shaft is removed, thereby reducing operation time of a user and the like.

Drawings

FIG. 1 is a schematic illustration of a structure of a gooseneck boom according to an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIGS. 3 and 4 are side views of a gooseneck boom side abutment provided by an embodiment of the utility model;

FIG. 5 is a top view of a gooseneck boom provided by an embodiment of the present utility model;

fig. 6 and 7 are enlarged schematic views at B in fig. 1.

1. A goose head arm section; 2. a main arm section; 3. the goose head arm side butt joint; 4. a main arm side butt joint; 5. a connection part; 6. pulley block; 7. a main arm connecting rod; 8. a gooseneck arm connecting rod; 9. a pin shaft; 10. a clamping block; 11. a clamping groove; 12. a gap.

Detailed Description

The utility model is further described below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in a specific case.

As shown in fig. 1 and 2, the present embodiment describes a gooseneck arm, which includes a main arm section 2 and a gooseneck arm section 1, where the main arm section 2 includes a first upper chord member and a first lower chord member; the gooseneck boom arm section 1 comprises a second upper chord member and a second lower chord member, wherein the second upper chord member is connected with the first upper chord member through a pin shaft 9, the second lower chord member is connected with the first lower chord member through a gooseneck boom side butt joint 3 and a main boom side butt joint 4 which are mutually clamped, and the second upper chord member is rotatably connected with the first upper chord member.

One end of the main arm section 2 is provided with a connecting part 5 as shown in fig. 1, and the connecting part 5 is positioned at the joint of the main arm section and the connecting pin shaft 9 of other main arm sections 2; one end of the goose head arm section 1 is provided with a pulley block 6 for construction;

as shown in fig. 1, the first upper chord member is provided with a main arm connecting rod 7, the second upper chord member is provided with a gooseneck connecting rod 8, and the main arm connecting rod 7 and the gooseneck connecting rod 8 are connected through a pin shaft 9.

As shown in fig. 6 and 7, the main arm connecting rod 7 is composed of two connecting rods with pin holes, the gooseneck connecting rod 8 is located between the two connecting rods with pin holes, through holes corresponding to the pin holes are formed in the gooseneck connecting rod 8, and the pin shafts 9 sequentially penetrate through the pin holes and the through holes to fix the main arm connecting rod 7 and the gooseneck connecting rod 8.

As shown in fig. 3, 4 and 5, the gooseneck boom side butt joint 3 has a square structure, and two sides of the surface of the gooseneck boom side butt joint 3, which are positioned at opposite angles, are respectively provided with a clamping block 10 and a clamping groove 11; a gap 12 is arranged between two adjacent clamping blocks 10 on the gooseneck arm side butt joint 3; the main arm side butt joint 4 and the gooseneck arm side butt joint 3 have the same structure.

When the device is used, the pin shaft 9 at the lower chord member joint of the gooseneck arm is removed, the butt joint 3 at the side of the gooseneck arm and the butt joint 4 at the side of the main arm are mutually clamped and connected, the contact area is increased by changing the contact into the planar contact, so that the contact stress is greatly reduced, the lower chord member joint of the gooseneck arm only bears the pressure, the same load is reduced, and the requirement of external force on the joint of the gooseneck arm is reduced;

compared with the prior art, the utility model has the beneficial effects that:

1. the utility model provides a gooseneck boom, which only bears pressure at the joint of the lower chord member of the gooseneck boom, so that a pin shaft 9 is removed, the contact is changed into planar contact, the contact area is increased, the contact stress is greatly reduced, and the requirement of external force on the joint of the gooseneck boom is reduced under the same load.

2. The utility model provides a gooseneck boom, which reduces manufacturing and using cost and saves working hours after a pin shaft 9 is removed, thereby reducing operation time of a user and the like.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and variations could be made by those skilled in the art without departing from the technical principles of the present utility model, and such modifications and variations should also be regarded as being within the scope of the utility model.

Claims

1. A gooseneck boom, comprising:

a main arm section (2), the main arm section (2) comprising a first upper chord and a first lower chord;

the goose head arm section (1) comprises a second upper chord member and a second lower chord member, the second upper chord member is connected with the first upper chord member through a pin shaft (9), and the second lower chord member is connected with the first lower chord member through a goose head arm side butt joint (3) and a main arm side butt joint (4) which are mutually clamped.

2. A gooseneck boom as claimed in claim 1, wherein: the second upper chord member is rotatably connected with the first upper chord member.

3. A gooseneck boom as claimed in claim 1, wherein: the first upper chord member is provided with a main arm connecting rod (7), the second upper chord member is provided with a gooseneck connecting rod (8), and the main arm connecting rod (7) and the gooseneck connecting rod (8) are connected through a pin shaft (9).

4. A gooseneck boom as claimed in claim 3, wherein: the main arm connecting rod (7) is composed of two connecting rods with pin holes, the goose head arm connecting rod (8) is located between the two connecting rods with the pin holes, through holes corresponding to the pin holes are formed in the goose head arm connecting rod (8), and the pin shafts (9) sequentially penetrate through the pin holes and the through holes to fix the main arm connecting rod (7) and the goose head arm connecting rod (8).

5. A gooseneck boom as claimed in claim 1, wherein: the goose head arm side butt joint (3) is of a square structure, and clamping blocks (10) and clamping grooves (11) are respectively arranged on two sides of the surface of the goose head arm side butt joint (3) which are positioned at opposite angles.

6. A gooseneck boom as claimed in claim 1, wherein: and a gap (12) is arranged between two adjacent clamping blocks (10) on the goose head arm side butt joint (3).

7. A gooseneck boom as claimed in claim 1, wherein: the main arm side butt joint (4) and the gooseneck arm side butt joint (3) have the same structure.