DD266790A1 - EXCAVATORS, ESPECIALLY FOR CRANES - Google Patents

Abstract

The invention is particularly suitable for cranes, which are used in flat and steep boom position, at maximum lifting height and maximum load freedom to the boom. The aim and object of the invention is to provide a boom with a boom head, in the flat position of the boom a maximum lifting height and in the steep position of the boom maximum load freedom is achieved to the boom. According to the invention the object is achieved in that the boom head is pivotally and adjustably connected to a fixed boom part and is rigidly connected by a movable locking wedge with the fixed boom part. Through the hook block and the lifting mechanism of the locking wedge is relieved and moved by a moving mechanism in an unloaded unlocking position. By lowering the hook block by means of the hoist, the boom head can be brought into a lowered position.

Description

For this 3 pages drawings

Field of application of the invention

The invention relates to the formation of the upper end einos boom for cranes, especially telescopic cranes. It is applicable both to freely mobile cranes, as well as to hoists, in which the boom in (punch and steep position used used.

Characteristic of the known technical solutions

There are cranes, in particular cranes rr.it telescopic jibs known whose hochgozogono jib tip in horizontal working position have a highly arranged upper bottle to erroichon a large lifting height. Kn nausleger continue to be known, equipped with a hammer telescopic boom to reach a maximum lifting height and optimal Last'roiheit to the boom. Farner are known boom with odostost odor gradual luffing luffing jibs, which have an upper auxiliary lug, with the help of a largoio '.ai tfreihoit is reached to the boom to overcome building protrusions. These lopsided Spitzenauslegor have «.ten disadvantage that with increased projection and Lastfroiheit to the boom only small load capacities can be realized.

information:

DE-PS 1965 118 IPKB66C; 4.23

US Pat. No. 3,620,379 IPK B 66 C; 6.23

US-PS 3715039 IPK B 66 C; 6.23

GB-PS 1221 510 IPKB66C; 6.23

Object of the invention

The aim of the invention is to provide a logger which ensures optimal crane paramotor operation both in the steep and in the horizontal working position of the boom.

Diiiiigung the nature of the invention

The invention has for its object to develop an upper boom end, which guarantees in the steep Arbeltsstellung of the boom a large Lnstfreiheit to the boom and in the horizontal working position of the Auslogers a large lifting height.

The solution of the problem is inventively characterized in that a jib head is pivotally connected to a jib tip. In the raised position, the boom head is locked by means of a locking wedge with the jib tip. In the lowered position, an arranged on the boom head I agerteil lays against a stop which is arranged on the jib tip. The adjustment of the boom head from the raised to the lowered position is done with the hoist and hook block. The hook block moves controlled in the upper, raised position against a Mitnohmerstütze, which is articulated in the boom head. The Mitnehmerstütze is designed so that the hook bottle is positively centered. The boom support raises the boom head, turning it around the pivot point on the jib tip and relieving the locking wedge. By actuating the adjusting mechanism, the locking wedge is brought into an ontritgelte position. By lowering the hook block with the hoist the boom is lowered until it touches the stop of the extension lever.

Ausführungsbolsplol

In the drawing, an Ausführungsboispiol the invention is shown. Show it:

Fig. 1: a view of the locked boom head in hochgezogenor position at horizontal Auslogerstollung, Fig. 2: oine front view of Auslegorkopfos

Flg. 3: a view of the boom head in abgosonktor position with steep boom position

Referring to Fig. 1, a log-out head 1 is movably disposed on a log-out chip 2. On boom head 1 oine hook bottle 3 is attached. Furthermore, a driver support 4 is articulated on the boom head 1, which centriort in a cup-shaped design of the hook bottle 3, For cluttering and releasing the boom head 1 is a Verstollmechanismus 5 is arranged, which is hydraulically, pneumatically, mechanically or electrically driven. By the adjusting mechanism 5, a Verriogolungskoil 6 is advanced, which is guided between a arranged in the Auslogerspitze 2 thrust bearing 7 and a arranged in the boom head 1 bearing part 9. An arranged in Auslogerkopf 1 stop 8 is provided to Anlago dos Lagererteilos 9 in the ontriegelton and around the pivot point 10 goschwonkton working position of the boom head 1. Fig. 1 shows the hochgezogono working position dos boom head 1, which is locked by the adjusting mechanism 5 by the pushed between the Goyan bearing 7 and the bearing part 9 locking corner 6. The hook bottle 3 v.ird centered by the rViitnehmerstütze 4 positively.

According to Figure 3, the boom is erected by the angle α and has reached a steep position. The locking wedge 6 was brought by the Verstollmechanismus 5 in an unlocked position. By means of the hook bottle 3 and de Mitnehmerstütze 4 of the boom head 1 was struck by rotation about the pivot point 10 and is held by the stop 8 on the jib tip 2 and the bearing part 9 on Auslogerkopf 1. The Hakenflascho 3 can be solved by the Mitnohmorstützo 4 and is ready for the load-carrying robot.

With such an arrangement of the cantilever head, the advantages oinor raised hook flax for flat Auslegerarbeitsstollungen and the advantages of the rigid Iwmmorkopfartigen cantilever tip have been combined.

Claims (3)

1. Ausjeger, especially for cranes, preferably; Telescopic jib cranes, working in both a horizontal and a make working position and where a hook block is attached to a boom head, characterized in that the boom head (1) by means of hook hook (3) and a driving support (4) is adjustably arranged, wherein for the determination in the raised position of the boom head (1) an adjusting mechanism (5) and a Vorriegelungskeil (6) and for the lowered position on the boom head (1) a bearing part (9) and on the jib tip (2) a stop (8) are arranged. 2. boom according to item 1, characterized in that the hook flanges (3) by the driving support (4) is positively zei.triert. 3. boom according to item I and 2, characterized in that the adjusting mechanism (5) is hydraulically, pneumatically, mechanically or electrically driven.