CN214693011U

CN214693011U - Square arm

Info

Publication number: CN214693011U
Application number: CN202022846605.6U
Authority: CN
Inventors: 童凡凡
Original assignee: Guangdong Anjiu Heavy Technology Equipment Co ltd
Current assignee: Guangdong Anjiu Heavy Technology Equipment Co ltd
Priority date: 2020-11-30
Filing date: 2020-11-30
Publication date: 2021-11-12
Anticipated expiration: 2030-11-30

Abstract

The utility model belongs to the tower crane field, which discloses a square arm, comprising a pair of upper truss main rods arranged side by side and a pair of lower truss main rods arranged side by side, wherein the upper truss main rods and the lower truss main rods form a square column frame structure, the upper truss main rods, the lower truss main rods and the upper truss main rods which are adjacent to each other up and down are connected through reinforcing rods, and the upper truss main rods are formed by bending a first section bar; one end of each of the two upper truss main rods is an asymptotic end, the other end of each of the two upper truss main rods is a parallel end, and the asymptotic ends of the two upper truss main rods converge to one place and are connected through a connecting piece. This side that square arm and tripod are connected is buckled through two first section bars and is formed a triangle-shaped structure like the round steel, realizes the connection with the tripod, and it does not need large tracts of land cutting, welding requirement among the traditional scheme, and its production is simple to can reduce equipment weight and reach hundreds of kilograms.

Description

Square arm

Technical Field

The utility model relates to a tower crane field, especially a four directions arm.

Background

CN201820938498.X discloses a screw square frame, including square frame main part, square frame main part both ends are provided with the truss port, four edges of truss port are the rectangle and distribute and have the arc recess, the joint has the truss to be responsible for between the arc recess, and is adjacent the equidistant interval has the truss standpipe between being responsible for of truss, the slope of square frame main part both sides is equipped with truss inclined support pipe, be connected with the stay tube between truss inclined support pipe and the truss port, the welding has the anchor strut between the middle and truss standpipe in truss port both ends.

The proposal discloses a square frame, not all parts on the suspension arm of the tower crane are square frames, the lifting end of the suspension arm is generally a triangular frame with a triangular section along the vertical surface, and the connection relationship between the triangular frame and the square frame is as follows: the main rod of the upper truss of the square frame needs to be transited to the tripod frame. In the transition process, in order to ensure that the stress is dispersed uniformly, the traditional mode is that a triangular plate is connected between a square frame and a triangular frame, the triangular plate C is an upper steel plate and a lower steel plate, and the middle of the triangular plate is hollowed to form a triangular frame. As shown in fig. 1.

The disadvantage of this solution is that the triangular frame requires cutting, large area welding, etc., which is very wasteful of manpower and material resources.

Therefore, the first problem to be solved by the technical scheme is as follows: how to realize the firm connection between tripod, the square frame, the material resources of using manpower sparingly simultaneously.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a square arm, one side that this square arm and tripod are connected is buckled through two round steel and is formed a triangle-shaped structure, realizes the connection with the tripod, and it does not need large tracts of land cutting, welding requirement in the traditional scheme, and its production is simple to can reduce equipment weight and reach hundreds of kilograms.

The utility model provides a technical scheme does: a square arm comprises a pair of upper truss main rods arranged side by side and a pair of lower truss main rods arranged side by side, wherein the upper truss main rods and the lower truss main rods form a square cylindrical frame structure, the upper truss main rods, the lower truss main rods and the upper and lower truss main rods which are adjacent to each other are connected through reinforcing rods, and the upper truss main rods are formed by bending a first section bar; one end of each of the two upper truss main rods is an asymptotic end, the other end of each of the two upper truss main rods is a parallel end, and the asymptotic ends of the two upper truss main rods converge to one place and are connected through a connecting piece.

The first section bar is a steel bar body, and the section of the first section bar is circular, oval or square.

It should be noted that the shape and structure of the first profile do not need to be strictly limited, but the first profile needs to meet the basic limitation of strength requirement. For example, if the first profile is a hollow tube, the wall thickness must be relatively thick to provide sufficient support strength. If the first profile is a solid round bar, the diameter can certainly be a little bit thinner. Therefore, the material selection of the first section bar is not limited too much, and the only limitation is that the strength is enough, and the first section bar cannot be deformed and bent in the using process.

In the above-mentioned square arm, the connecting member is located on a horizontal midperpendicular of a line connecting the parallel ends of the two upper truss main rods.

In the above-mentioned square arm, the connecting piece includes an upper connecting plate, a lower connecting plate, a U-shaped plate, one end of the U-shaped plate is welded on the upper surface of the upper connecting plate, the other end of the U-shaped plate is welded on the lower surface of the lower connecting plate, and the approaching ends of the two upper truss main rods are welded between the upper connecting plate and the lower connecting plate.

In the square arm, the U-shaped plate is connected with the lower truss main rod through a connecting rod.

In the above-mentioned square arm, the lower truss main rod is a second section bar, and the second section bar is one of a square steel pipe, a square steel column, a round steel pipe and a round steel column.

In the square arm, the reinforcing rod is made of round steel, and the reinforcing rod is connected with the lower truss main rod and the upper truss main rod through the connecting lug plates in a welding mode.

After the technical scheme is adopted in the utility model, its beneficial effect who has is:

this scheme replaces the last truss mobile jib of square frame with a first section bar like the round steel, and it forms a triangle-shaped structure with the one end bending type of round steel, gathers together and connects through the connecting piece a bit, and the steel sheet that cuts into triangle-shaped with the needs in the traditional scheme replaces, the effectual manpower and materials of having practiced thrift, has reduced product weight.

Drawings

Fig. 1 is a structural view of a square arm in the background art of the present invention;

fig. 2 is a perspective view of embodiment 1 of the present invention;

fig. 3 is a front view of the tripod of the present invention.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the following detailed description, but the present invention is not limited thereto.

Example 1:

as shown in fig. 2-3, a square arm includes a pair of upper truss main rods 1 arranged side by side and a pair of lower truss main rods 2 arranged side by side, the upper truss main rods 1 and the lower truss main rods 2 form a square column frame structure, the upper truss main rods 1, the lower truss main rods 2, and the upper truss main rods 1 and the lower truss main rods 2 adjacent to each other are connected by reinforcing rods 3, and the upper truss main rods 1 are formed by bending a round steel; one end of each of the two upper truss main rods 1 is an asymptotic end B, the other end of each of the two upper truss main rods 1 is a parallel end A, and the asymptotic ends B of the two upper truss main rods 1 converge to one place and are connected through a connecting piece 4.

In this embodiment the progressive ends meet at the connector 4 to form a tip, the connector 4 at this tip being connected to the connector 4 on the external tripod. The tripod is shown in fig. 3, and the upper chord D of the tripod is connected with the connecting piece 4.

The benefit of this is that: compared with a triangular structure formed by cutting two steel plates, the steel plates and the upper truss main rod 1 of the square frame do not need to be welded, the structure is complete, and stress distribution is uniform; it is lighter in weight; the processing is simple, and manpower and material resources are effectively reduced.

Preferably, the connecting member 4 is located on the horizontal perpendicular bisector of the connecting line of the parallel ends a of the two upper truss main bars 1.

Preferably, the connecting member 4 includes an upper connecting plate 41, a lower connecting plate 42, and a U-shaped plate 43, one end of the U-shaped plate 43 is welded to the upper surface of the upper connecting plate 41, the other end of the U-shaped plate 43 is welded to the lower surface of the lower connecting plate 42, and the proximal ends B of the two upper main truss rods 1 are welded between the upper connecting plate 41 and the lower connecting plate 42. Of course, this embodiment does not exclude other connection manners, except that the connecting member 4 is a common connecting member 4 in the tower crane field, and the structural stability and reliability of the connecting member 4 have been tested by wide application.

In this embodiment, the U-shaped plate 43 is connected to the lower truss main rod 2 through a connecting rod 5, and the lower truss main rod 2 is a square steel pipe. In practical application, the lower truss main rod 2 can also be solid square steel, round steel and the like.

Preferably, the reinforcing rod 3 is made of round steel, and the reinforcing rod 3 is welded to the lower truss main rod 2 and the upper truss main rod 1 through connecting ear plates 6.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. A square arm comprises a pair of upper truss main rods arranged side by side and a pair of lower truss main rods arranged side by side, wherein the upper truss main rods and the lower truss main rods form a square cylindrical frame structure, and the adjacent upper truss main rods, the adjacent lower truss main rods, and the upper truss main rods and the lower truss main rods which are vertically adjacent are connected through reinforcing rods; one end of each of the two upper truss main rods is an asymptotic end, the other end of each of the two upper truss main rods is a parallel end, and the asymptotic ends of the two upper truss main rods converge to one place and are connected through a connecting piece.

2. A quadrilateral arm according to claim 1 wherein the connector is located on the horizontal mid-vertical line of the line connecting the parallel ends of the two upper truss main bars.

3. A quadrilateral arm according to claim 1 wherein the connecting member comprises an upper connecting plate, a lower connecting plate, a U-shaped plate, one end of the U-shaped plate being welded to the upper surface of the upper connecting plate, the other end of the U-shaped plate being welded to the lower surface of the lower connecting plate, the proximal ends of the two upper truss main bars being welded between the upper connecting plate and the lower connecting plate.

4. The square arm of claim 3, wherein the U-shaped plate is connected with the lower truss main rod through a connecting rod.

5. The square arm of claim 1, wherein the lower truss main rod is a second section bar, and the second section bar is one of a square steel tube, a square steel column, a round steel tube and a round steel column.

6. The square arm according to claim 1, wherein the reinforcing rod is made of round steel, and the reinforcing rod is connected with the lower truss main rod and the upper truss main rod through connection lug plates in a welding mode.

7. A quadrilateral arm according to any one of claims 1 to 6 wherein the first profile is a steel bar and the cross-section of the first profile is circular or elliptical or square.