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Title:
SHACKLE
Document Type and Number:
WIPO Patent Application WO/2017/153635
Kind Code:
A1
Abstract:
The invention relates to a shackle that is meant to be fastened at an end of a boom structure that is to be used by a working machine, in order to couple therewith one or more organs, such as a rotator, a grip loader and/or the like, to be driven by power transmission transmitted from a hydraulic system of the working machine. The shackle has as a frame structure that rotates around two axes of rotation (x, y) perpendicular to each other and that is to be fastened by its opposite ends in longitudinal direction (s) to the boom structure and to the organ, and an actuator arrangement (2) that is driven by auxiliary power, advantageously operating by transmission of the working machine's hydraulic system, for dampening/locking of the shackle's swinging and for releasing the same to rotate around its axes of rotation. The shackle's (RP) actuator arrangement (2) is arranged to dampen/lock and to release the rotation of in respect with each other separate frame parts (1a, 1b) of the shackle by changing a mutual distance (e) of the shackle's axes of rotation (x, y).

Inventors:
VALLIUS, Lauri (Patapuronkatu 8 C 34, JOENSUU, 80160, FI)
KORPELAINEN, Urho (Vanha Kaltimontie 1051, AHVENINEN, 81260, FI)
Application Number:
FI2017/050150
Publication Date:
September 14, 2017
Filing Date:
March 06, 2017
Export Citation:
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Assignee:
VALLIUS FORESTRY OY LTD (Vanha Kaltimontie 1051, AHVENINEN, 81260, FI)
International Classes:
B66C3/00; B66C13/06; F16C11/10
Domestic Patent References:
2009-12-17
Foreign References:
EP2455321A12012-05-23
US4099762A1978-07-11
Attorney, Agent or Firm:
KANGASMÄKI, Reijo (Finnish Patent Consulting FPC, PL 25, Tampere, 33401, FI)
Download PDF:
Claims:
Claims :

1. Shackle that is meant to be fastened at an end of a boom structure (P) that is, to be used by a working machine, in order to couple therewith one or more organs (T) , such as a rotator, a grip loader and/or the like, to be driven by power transmission transmitted from a hydraulic system of the working machine, the shackle having as a frame structure that rotates (w) around two axes of rotation (x, y) perpendicular to each other and that is to be fastened by its opposite ends in longitudinal direction (s) to the boom structure (P) and to the organ (T) , and an actuator arrangement (2) that is driven by auxiliary power, preferably operating by transmission of the working machine's hydraulic system, for dampening/locking of the shackle's swinging and for releasing the same to rotate around its axes of rotation, characterized in that, the shackle's (RP) actuator arrangement (2) is arranged to dampen/lock and to release the rotating motion (w) of in respect with each other separate frame parts (la, lb) of the shackle by changing a mutual distance (e) of the shackle's axes of rotation (x, y) , which is made possible by means of an intermediate piece (2a) that is to be coupled movably in the shackle's longitudinal direction (s) with joint shafts (2al) existing in joint holes (R) in the frame parts (la, lb), the holes being parallel with the axes of rotation (x, y) , wherein fastening ears (K) of the intermediate piece have joint holes (NR) that are elongated in the longitudinal direction (s) .

2. Shackle according to claim 1, characterized in that, the intermediate piece (2a) is coupled with the frame parts' (la, lb) joint holes (R) by joint shafts (2al) that are coupled with each other by means of an actuator (2a2) that enables the changing of the mutual distance (e; el, e2) thereof.

3. Shackle according to claim 2, characterized in that, the actuator (2a2) comprises a hydraulic cylinder that is coupled between the joint shafts (2al) rotatively, such as by sleeve pieces (H) or correspondingly .

4. Shackle according to any of the preceding claims 1 - 3, characterized in that, the locking of the frame parts (la, lb) is arranged by mutual form locking arrangements (M) of joint ears (N) thereof and the intermediate piece (2a) coupled therebetween. 5. Shackle according to claim 4, characterized in that, the form locking arrangements (M) are arranged by cylindrical surfaces between end surfaces of the frame parts' (la, lb) joint ears (N) and the intermediate piece's (2a) locking surfaces (Lp) .

6. Shackle according to any of the preceding claims

1 - 5, characterized in that, the locking of the mutual distance (e) of the frame parts' (la, lb) axes of rotation (x, y) is arranged by joint holes (NR) in the intermediate pieces' fastening ears (K) that are essentially longer than the actuator's (2a2) stroke length .

7. Shackle according to any of the preceding claims 1 - 6, characterized in that, in connection therewith is arranged a levelling arrangement (V) for determining a mass of a load hanging on the shackle.

8. Shackle according to any of the preceding claims 1 - 7, characterized in that, its one or both frame parts (la, lb) is/are arranged by structural parts (laP, lbT) that are built-in at the end of the boom structure (P) and/or in the organ (T) .

Description:
Shackle

The invention relates to a shackle according to the preamble of the independent claim directed thereto.

Shackles are being used for the coupling of an organ that is to be coupled at an end of a boom structure, such as e.g. a rotator and a grip loader coupled therewith, with the boom structure, the organ being driven typically by power transmission transmitted from a hydraulic system of the working machine.

In the international application publication WO 2014/129954 is presented a so called cross-jointed shackle, which is arranged rotatable by joints at opposite ends thereof with respect to two axes of rotation perpendicular to each other. Upper end of the shackle is coupled at an end of a boom unit and lower end thereof with a rotator, wherein in the solution in question hydraulic couplings of the rotator are arranged at opposite sides of the shackle's lower end joint part. The purpose of the solution is to lead hydraulic pipes e.g. of a rotator in connection with the shackle in a protected manner and so that, thanks to being installed at opposite sides of the rotator, they dampen the shackle's swinging motion.

The rotating motion of the type of shackle as described above is thus dampened only by the hydraulic pipes, in which case use of the shackle in practice by locking it in desired positions is practically impossible, which is why the shackle in question, despite enabling protection of the hydraulic pipes, does not have a concrete meaning in practice, but in limited operating purposes.

On the other hand, in the application publication SE 1051216 is presented in a corresponding manner cross- linked shackle with a brake for dampening the swinging of a tool to be used e.g. by a rotator. The solution in question has an actuator arrangement that is arranged to restrict the rotating motion of the shackle's one or both joint shafts by means of a hydraulically operated brake.

This solution is very disadvantageous in practice, because the power needed for braking is at its highest when the power influence is directed to the joint shaft, a consequence of which is a high temperature strain directed to structures of the shackle and in longer-term use deformations and fatigue thereof. Thus, the solution in question does not enable in practical use a very long-lasting shackle particularly for the part of the dampening action of its swinging motion.

It is the aim of the shackle according to the present invention to achieve a decisive improvement to the aforementioned problems and thus to raise essentially the level of prior art in the field. In order to achieve this aim, the the shackle according to the invention is mainly defined by the disclosure of the characterizing part of the independent claim directed thereto. As the most important advantages of the shackle according to the invention may be mentioned the simplicity of the operating principle and the part entireties thereof as well as the efficiency of the shackle's functioning, thanks to which it is possible to make sure optimal and reliable functioning of the shackle in its operating purpose with as simple constructions and as low use of power as possible in a way, that both dampening of the shackle' s swinging motion and locking and releasing thereof are enabled in a totally controllable and stepless manner in all operating positions of the shackle. The shackle according to the invention comprises an intermediate piece that is coupled with the shackle' s in respect with each other separate frame parts and, in which joint shafts, being coupled with the frame parts' joint holes, are coupled with each other by means of an actuator that enables the changing of the mutual distance thereof at its simplest by one hydraulic cylinder to be controlled from the working machine's cabin and to be driven by transmission of the hydraulic system thereof.

The shackle according to the invention thus makes possible a continuous and trouble-free functioning of the working machine, wherein by locking the shackle in a suitable working position, the tool being used in the working can be used in its best possible position at any given time. In this case, the shackle can be rapidly released free to move by a short stroke of the actuator, or arranged, when needed, just to enable dampening of the shackle's swinging motion by fine adjusting the actuator's pressure. One crucial advantage of the invention is also the fact that a friction surface of the shackle according to the invention gets increased along with wearing, when instead in existing solutions the same gets decreased.

Other advantageous embodiments of the shackle according to the invention are presented in the dependent claims directed thereto.

In the following description, the invention is presented in detail in conjunction with the accompanying drawings, in which figures la, lb and lc

show by way of example as a front view and as a side view an advantageous shackle according to the invention, in which the frame parts (figures la, lb) are locked in the longitudinal direction of the shackle, and (figure lc) released, figures 2a and 2b

show as a perspective view and as an enlarged detail view a locked and a released shackle according to the invention at an end of a boom structure to be coupled with a working machine, re 3

shows an explosion view of an advantageous shackle according to the invention, and figure 4

show as a perspective view an advantageous shackle according to the invention utilizing part entireties therein that are in common with the boon structure and the organ. The invention relates to a shackle that is meant to be fastened at an end of a boom structure P, that is to be used by a working machine, in order to couple therewith one or more organs T, such as a rotator, a grip loader and/or the like, to be driven by power transmission transmitted from a hydraulic system of the working machine. The shackle has a frame structure that rotates w around two axes of rotation x, y perpendicular to each other and that is to be fastened by its opposite ends in longitudinal direction s to the boom structure P and to the organ T, and an actuator arrangement 2 that is driven by auxiliary power, advantageously operating by transmission of the working machine's hydraulic system, for dampening/locking of the shackle's swinging and for releasing the same to rotate around its axes of rotation. The shackle's RP actuator arrangement 2 is arranged e.g. with reference to figures la and lc to dampen/lock and to release in respect with each other separate frame parts la, lb of the shackle by changing a mutual distance e of the shackle's axes of rotation x, y, which is made possible especially with reference to figure 3 by means of an intermediate piece 2a that is to be coupled movably in the longitudinal direction s with joint shafts 2al existing in joint holes R in the frame parts la, lb, the holes being parallel with the axes of rotation x, y, wherein fastening ears K of the intermediate piece have joint holes NR that are elongated in the longitudinal direction s. As an advantageous embodiment of the shackle according to the invention, the intermediate piece 2a is coupled with the frame parts' la, lb joint holes R by joint shafts 2al that are coupled with each other by means of an actuator 2a2 that enables the changing of the mutual distance e; el, e2 thereof.

Furthermore as an advantageous embodiment of the shackle according to the invention, the actuator 2a2 comprises a hydraulic cylinder that is coupled between the joint shafts 2al rotatively e.g. by sleeve pieces H.

As a further advantageous embodiment of the shackle according to the invention, the locking of the frame parts la, lb is arranged especially with reference to figures la-lc and 2a, 2b by mutual form locking arrangements M of joint ears N thereof and the intermediate piece 2a coupled therebetween. As a further advantageous embodiment of the shackle according to the invention, the form locking arrangements M are arranged by cylindrical surfaces between end surfaces of the frame parts' la, lb joint ears N and the intermediate piece' s 2a locking surfaces Lp.

As a further advantageous embodiment of the shackle according to the invention, the locking of the mutual distance e of the frame parts' la, lb axes of rotation x, y is arranged by joint holes NR in the intermediate pieces' fastening ears K that are essentially longer than the actuator's 2a2 stroke length.

When the joint holes in the fastening ears are longer than the actuator' s 2a2 stroke length, it is made sure that the locking takes place between the frame parts la, lb thanks to an adequate clearance in the intermediate piece 2a. In this context, a total locking of the shackle is achieved by coupling full pressure with the hydraulic cylinder 2a2, in which case by adjusting its pressure, the dampening of the shackle's swinging motion can be controlled partly to yield as needed, thanks to which device damages e.g. due to sudden powerful impacts can be avoided. The shackle is rapidly releasable in all its operating positions into a fully movable state thanks to the short stroke length of the hydraulic cylinder .

As an advantageous embodiment of the invention, in connection therewith is arranged especially with reference to figure 3 a levelling arrangement V for determining a mass of a load hanging on the shackle.

As a further advantageous embodiment of the invention with reference to figure 4, its one or both frame parts la, lb is/are arranged by structural parts laP, lbT that are built-in at the end of the boom structure P and/or in the organ T.

The invention makes possible a very short shackle, having advantageously a length e.g. of -370 mm, in which case the needed stroke length of the hydraulic cylinder is correspondingly just about 26 mm.

It is clear that the invention is not limited to the previously illustrated or described embodiments, but instead it can be modified within the scope of the invention's basic idea as required by the operating purposes and load bearing requirements at any given time. The embodiments shown in the drawings are exemplary in such respect that instead of the shapes with sharp angles, it is profitable from the point of view of the shackle's strength properties to implement the same for certain parts thereof with rounded shapes. On the other hand, it is possible that the shackle according to the invention does not have either one of the frame parts e.g. when coupling the other end thereof with a frame part that is built-in with the boom structure or the organ, or with a separate coupling part provided for the purpose. In certain embodiments, an elongated joint hole can be utilized in only one of the intermediate part's jointing points.