CN202575788U

CN202575788U - Guyed arm support anti-back tilting device of crane

Info

Publication number: CN202575788U
Application number: CN 201220067650
Authority: CN
Inventors: 郑镇明
Original assignee: JIANGSU DATONG HEAVY INDUSTRY Co Ltd
Current assignee: JIANGSU DATONG HEAVY INDUSTRY Co Ltd
Priority date: 2012-02-28
Filing date: 2012-02-28
Publication date: 2012-12-05
Anticipated expiration: 2022-02-28

Abstract

The utility model discloses a guyed arm support anti-back tilting device of a crane. The guyed arm support anti-back tilting device comprises a disc spring device, a guy, a horizontal rod and a diagonal rod, wherein the top of the disc spring device is hinged below the arm support; one end of the horizontal rod and one end of the diagonal rod are vertically hinged with the front end of a table respectively; the other ends of the horizontal rod and the horizontal rod are mutually hinged to form a stable tripod structure; the upper end of the guy is hinged with the bottom of the disc spring device; and the upper end of the guy is hinged with a hinge point of the horizontal rod and the diagonal rod. The guyed arm support anti-back tilting device has the beneficial effects that the reliability of the arm support anti-back tilting safety protection device is effectively improved, the machining and manufacturing are simple, the field mounting is convenient and the manufacturing and mounting cost can be reduced.

Description

Hoisting crane drag-line jib anti-squat system

Technical field

This utility model relates to a kind of crane safety device, and particularly a kind of hoisting crane drag-line jib anti-squat system belongs to hoisting crane manufacturing technology field.

Background technology

Hoisting crane utilizes the mechanism of steel rope elevator luffing to have two kinds: a kind of is the luffing mechanism that load hook goes up and down along with the variation of jib work range, is complementary luffing mechanism; Another kind is that luffing mechanism that load hook can level of approximation moves along with the variation of jib work range is the workability luffing mechanism.The level of approximation of workability luffing mechanism suspension hook moves, and the way that relies on raising line in time to compensate the raising line of folding and unfolding certain-length realizes, therefore; In amplitude changing process, form an opposition naturally; Make the jib hypsokinesis, possibly make total luffing power negative value occur during particularly big by a small margin lifting, make the hypsokinesis of jib nature; The jib hypsokinesis that unexpected unloading during in addition, to big lifting by a small margin and unloaded by a small margin wind surface also possibly cause.

At present, existing jib anti-squat system is the Jackstay type anti-squat system that is located at the jib back, and it is made up of strut, disk spring and guide cylinder; Guide cylinder root and board are hinged; The strut head can only be worked as when jib is received the width of cloth to certain amplitude and could be contacted with the supporting base on being welded on the jib root segment, continues to receive the width of cloth, compact disc spring; Strut shortens, and also makes the flexural deformation of jib main chord simultaneously and pass to web member stressed.Here just have two problems, one of which: strut head in the relative motion and the supporting base on the jib must have the failure-free guide piece, both are effectively contacted, otherwise will not shield.Its two: the crooked web member pressurized of jib main chord, then claimed structure itself has enough strength and stiffness.Therefore the reliability of existing Jackstay type anti-squat system is not high, and is high to the strength and stiffness requirement of jib main chord and web member, increased the manufacturing cost of installation.

Summary of the invention

Goal of the invention: the purpose of the utility model provides a kind of reliability height, makes the low hoisting crane drag-line jib anti-squat system of cost of installation.

Technical scheme: a kind of hoisting crane drag-line jib anti-squat system, comprise dish spring arrangement, drag-line, horizon bar and brace, the top of said dish spring arrangement is articulated in the below of jib; One end of said horizon bar and brace is articulated in the front end of board respectively up and down, and the other end of horizon bar and brace is hinged and forms stable tripod structure; The bottom-hinged of the upper end of said drag-line and dish spring arrangement, the upper end of said drag-line is articulated in the hinge-point of horizon bar and brace.The utility model adopts radial type to connect; The situation that does not exist device and jib to throw off in the whole amplitude changing process; When receiving the width of cloth to certain by a small margin the time; Drag-line tensioning compact disc spring promptly begins to play anti-hypsokinesis effect, has solved the technical matters that just can play anti-hypsokinesis effect when the strut head must reliably get into supporting base.The stressed relative jib of the utility model is that the chord member compression web member is drawn, and does not need to improve especially the strength and stiffness of jib structure.Thereby also improved safety relatively, overcome the defective that the Jackstay type device might need local stiffening.

Beneficial effect: the utility model has improved the reliability of the anti-hypsokinesis safety guard of jib effectively, and processing and fabricating is simple, and on-site installation is convenient, can reduce and make cost of installation.

Description of drawings

Fig. 1 is the structural representation of the utility model.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is described further.

As shown in the figure, a kind of hoisting crane drag-line jib anti-squat system comprises dish spring arrangement 1, drag-line 2, horizon bar 3 and brace 4, and the top of said dish spring arrangement 1 is articulated in the below of jib 5; One end of said horizon bar 3 and brace 4 is articulated in the front end of board 6 respectively up and down, and the other end of horizon bar 3 and brace 4 is hinged and forms stable tripod structure; The bottom-hinged of the upper end of said drag-line 2 and dish spring arrangement 1, the upper end of said drag-line 2 are articulated in the hinge-point of horizon bar 3 and brace 4.The utility model adopts radial type to connect; The situation that does not exist device and jib 5 to throw off in the whole amplitude changing process; When receiving the width of cloth to certain by a small margin the time; Drag-line 2 tensioning compact disc springs 1 promptly begin to play anti-hypsokinesis effect, have solved the technical matters that just can play anti-hypsokinesis effect when the strut head must reliably get into supporting base.The stressed relative jib 5 of the utility model is that the chord member compression web member is drawn, and does not need to improve especially the strength and stiffness of jib structure.Thereby also improved safety relatively, overcome the defective that the Jackstay type device might need local stiffening.

Claims

1. hoisting crane drag-line jib anti-squat system, it is characterized in that: comprise dish spring arrangement (1), drag-line (2), horizon bar (3) and brace (4), the top of said dish spring arrangement (1) is articulated in the below of jib (5); One end of said horizon bar (3) and brace (4) is articulated in the front end of board (6) respectively up and down, and the other end of horizon bar (3) and brace (4) is hinged and forms stable tripod structure; The bottom-hinged of the upper end of said drag-line (2) and dish spring arrangement (1), the upper end of said drag-line (2) is articulated in the hinge-point of horizon bar (3) and brace (4).