CN210795590U

CN210795590U - Crane jib

Info

Publication number: CN210795590U
Application number: CN201921722225.2U
Authority: CN
Inventors: 郜永法
Original assignee: Jiangsu Gangyun Machinery Co ltd
Current assignee: Xu Zhongliang
Priority date: 2019-10-15
Filing date: 2019-10-15
Publication date: 2020-06-19
Anticipated expiration: 2029-10-15

Abstract

The utility model discloses a crane jib, which comprises a main arm and an auxiliary arm, wherein three groups of lug plates are symmetrically welded on the auxiliary arm, the lug plates are fixed on the outer wall of the main arm through bolts, a fixed block is welded at the tail end of a piston rod of the main arm, a first groove is arranged on one side of the fixed block, which is far away from the main arm, four groups of first threaded holes are arranged on the fixed block, the auxiliary arm comprises a fixed frame and an extension arm, the extension arm is slidably connected in the fixed frame, two groups of second threaded holes are arranged at the bottom end of the fixed frame in a penetrating way, fixed plates are welded on both sides of the fixed frame, three threaded holes are arranged on the two groups of fixed plates corresponding to the bottom end of the extension arm, a wire take-up roller is arranged on the main arm, a hoisting rope is arranged, the construction stability is good.

Description

Crane jib

Technical Field

The utility model relates to a hoist technical field specifically is hoist davit.

Background

The crane is a multi-action hoisting machine for vertically lifting and horizontally carrying heavy objects within a certain range, and is also called a crown block, a navigation crane and a crane. The crane boom is an important device on the crane, commonly called as a boom and a suspension arm, is a bidirectional bending metal structural member for supporting a lifting rope, a fetching device or a variable amplitude trolley, and is generally supported on a rotary table or a tower body of the crane through a connecting pin shaft, a steel wire rope or a hydraulic cylinder. A crane boom is generally composed of a main jib and an auxiliary jib.

The conventional crane auxiliary jib is mostly composed of a metal frame with reinforcing ribs, the conventional crane auxiliary jib is generally arranged in a hollow mode in order to reduce weight, the length of the conventional crane auxiliary jib cannot be adjusted, meanwhile, the connection strength of the auxiliary jib and a main jib is low, and accidents are easily caused by bending of the auxiliary jib in the construction process.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a crane jib, fly jib length is convenient for adjust, and the fixed firm of fly jib, and construction stability is good to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: crane davit, including main arm and fly jib, the symmetrical welding has three otic placodes of group on the fly jib, the otic placode is fixed in on the main arm outer wall through the bolt, the welding of the piston rod end of main arm has the fixed block, keep away from one side of main arm on the fixed block and seted up first recess, four first screw holes of group have been seted up on the fixed block, the fly jib is including fixed frame and extension arm, extension arm sliding connection is in fixed frame, two sets of second screw holes have been seted up in running through to fixed frame bottom, the fixed plate has all been welded to both sides on the fixed frame, and is two sets of correspond with the extension arm bottom on the fixed plate and seted up the third screw hole, install the receipts line roller on the main arm, be equipped.

Preferably, the first threaded hole, the second threaded hole and the third threaded hole are matched with the bolt.

Preferably, the fixed frame is welded with reinforcing ribs at equal intervals, and the reinforcing ribs are X-shaped.

Preferably, the fixing plate is provided with through holes at equal intervals.

Preferably, a second groove is formed in one side of the fixing block, and the four groups of first threaded holes penetrate through the second groove.

Preferably, an elastic rubber pad is glued in the second groove.

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

the fly jib is including fixed frame and extension arm, set up extension arm sliding connection in fixed frame, run through and set up two sets of second screw holes in fixed frame bottom, the equal welding fixed plate in both sides on fixed frame, correspond with the extension arm bottom on two sets of fixed plates and seted up the third screw hole, six bolt fastening of accessible when the fly jib is idle are on the main arm, when main arm total length is less than the construction demand, four bolt fastening of fly jib accessible are on the fixed block, the third screw hole of suitable position on the extension arm of fly jib can select the fixed plate according to required length, fix on fixed frame through remaining two sets of bolt, thereby accomplish the extension to davit total length.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic side view of the auxiliary arm of the present invention;

fig. 3 is the schematic view of the sectional structure of the fixing block of the present invention.

In the figure: 1. a main arm; 2. an auxiliary arm; 3. a bolt; 4. a fixed block; 5. a first groove; 6. a first threaded hole; 7. a fixing frame; 8. an extension arm; 9. a second threaded hole; 10. a fixing plate; 11. a third threaded hole; 12. a wire take-up roller; 13. a hoisting rope; 14. a pulley block; 15. reinforcing ribs; 16. a through hole; 17. a second groove; 18. an elastic rubber pad; 19. an ear plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: the crane boom comprises a main boom 1 and an auxiliary boom 2, wherein the main boom 1 is driven by a built-in hydraulic system, three groups of lug plates 19 are symmetrically welded on the auxiliary boom 2, and the lug plates 19 are fixed on the outer wall of the main boom 1 through bolts 3;

the tail end of a piston rod of the main arm 1 is welded with a fixing block 4, one side, far away from the main arm 1, of the fixing block 4 is provided with a first groove 5, the fixing block 4 is provided with four groups of first threaded holes 6, one side of the fixing block 4 is provided with a second groove 17, and the four groups of first threaded holes 6 are arranged through the second groove 17, so that the bolt 3 can be installed on the fixing block 4 in a sinking mode when the auxiliary arm 2 is fixed, and in order to further increase the connection tightness of the bolt 3 and the first threaded hole 6, an elastic rubber pad 18 is glued in the second groove 17;

the auxiliary arm 2 comprises a fixing frame 7 and an extension arm 8, the extension arm 8 is connected in the fixing frame 7 in a sliding mode, two groups of second threaded holes 9 are formed in the bottom end of the fixing frame 7 in a penetrating mode, reinforcing ribs 15 are welded on the fixing frame 7 at equal intervals in order to enhance structural strength of the fixing frame 7, the reinforcing ribs 15 are X-shaped, fixing plates 10 are welded on two sides of the fixing frame 7, through holes 16 are formed in the fixing plates 10 at equal intervals, cost consumed by the fixing plates 10 is reduced, third threaded holes 11 are formed in the two groups of fixing plates 10 corresponding to the bottom end of the extension arm 8, and the first threaded holes 6, the second threaded holes 9 and;

the main arm 1 is provided with a wire take-up roller 12, the wire take-up roller 12 is provided with a hoisting rope 13, the hoisting rope 13 is a steel wire rope adopting a steel wire core, and the fixed block 4 and the top end of the extension arm 8 are provided with pulley blocks 14.

The working principle is as follows: when the total length of the main arm is smaller than the construction requirement, six groups of bolts 3 are screwed down, the auxiliary arm 2 is taken down, the bottom end of the auxiliary arm is placed in the first groove 5, the four groups of bolts 3 are respectively fixed in the four groups of first threaded holes 6, and the extension arm 8 is pulled out to a proper length. And the remaining two groups of bolts 3 are fixed into the third threaded holes in the extension arm 8 through the third threaded holes 11 in the fixing plate 10 to complete the assembly, and at the moment, an operator can control a hydraulic system in the main arm 1 through an external switch so as to control the whole suspension arm.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Crane jib, including main arm (1) and fly jib (2), its characterized in that: the auxiliary arm (2) is symmetrically welded with three groups of lug plates (19), the lug plates (19) are fixed on the outer wall of the main arm (1) through bolts (3), the tail end of a piston rod of the main arm (1) is welded with a fixing block (4), one side of the fixing block (4) far away from the main arm (1) is provided with a first groove (5), the fixing block (4) is provided with four groups of first threaded holes (6), the auxiliary arm (2) comprises a fixing frame (7) and an extension arm (8), the extension arm (8) is slidably connected in the fixing frame (7), the bottom end of the fixing frame (7) is provided with two groups of second threaded holes (9) in a penetrating way, both sides of the fixing frame (7) are welded with fixing plates (10), the two groups of fixing plates (10) are provided with third threaded holes (11) corresponding to the bottom end of the extension arm (8), and the main, the wire take-up roller (12) is provided with a hoisting rope (13), and the fixed block (4) and the top end of the extension arm (8) are provided with pulley blocks (14).

2. The crane boom of claim 1, wherein: the first threaded hole (6), the second threaded hole (9) and the third threaded hole (11) are matched with the bolt (3).

3. The crane boom of claim 1, wherein: the fixed frame (7) is equidistantly welded with reinforcing ribs (15), and the reinforcing ribs (15) are X-shaped.

4. The crane boom of claim 1, wherein: the fixing plate (10) is provided with through holes (16) at equal intervals.

5. The crane boom of claim 1, wherein: a second groove (17) is formed in one side of the fixing block (4), and the four groups of first threaded holes (6) penetrate through the second groove (17).

6. The crane boom of claim 5, wherein: an elastic rubber pad (18) is glued in the second groove (17).