CN212764267U

CN212764267U - Articulated arm structure for rotating wind turbine blade moulds

Info

Publication number: CN212764267U
Application number: CN202020660048.6U
Authority: CN
Inventors: M·罗比塔耶; K·休斯顿; M·布罗德尔
Original assignee: Guruite Mould Taicang Co ltd
Current assignee: Guruite Mould Taicang Co ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2021-03-23
Anticipated expiration: 2030-04-27
Also published as: WO2021218636A1

Abstract

The utility model discloses an articulated arm structure for rotating wind turbine blade mould, it includes the rotating pin, through the top articulated arm and the bottom articulated arm that the rotating pin rotationally connects. The pivot pin is rotatable about a hinge axis at least in the bottom hinge arm and is translationally fixed in the bottom hinge arm by a fixing mechanism comprising a mounting plate, a washer and a fixing member. The top articulated arm obtained by welding the two top articulated arm plates is light in weight, high in structural strength and low in cost; the use of an articulated beam tie-down plate to connect with the bottom articulated arm through one or more cylindrical pins reduces production costs; the hinge arm and the hinge beam are connected by the hinge beam binding plate and the fastener, which can increase the connection point therebetween and improve the stress structure at the joint of the hinge arm and the hinge beam. The pivot pin connecting the top and bottom hinge arms is characterized by low cost, high manufacturing throughput, and ease of operation without the need for any special installation kit.

Description

Articulated arm structure for rotating wind turbine blade moulds

Technical Field

The utility model relates to a wind turbine blade mould field of making, specifically speaking relates to an articulated arm structure for rotating wind turbine blade mould.

Background

It is known in the art to provide an articulated arm structure for turning wind turbine blade moulds. Typically, the articulated arm structure comprises a bottom articulated arm for fitting to a lower mould section of a wind turbine blade mould and a top articulated arm for fitting to an upper mould section of a wind turbine blade mould. A hinge mechanism pivotally connects the top hinge arm to the bottom hinge arm to allow the top hinge arm to pivot about a hinge axis between a lower position and an upper position. In the lower position the wind turbine blade mould is in the open configuration and the upper mould part is transverse to the lower mould part, whereas in the upper position the wind turbine blade mould is in the closed configuration and the upper mould part is above the lower mould part.

In the prior art, there are two main techniques to open and close a wind turbine blade mould. The first technique is to use a double cylinder to drive a hydraulic mold opening and closing mechanism for the purpose of opening and closing the mold, or to connect a motor with a decelerator as a driving source for opening and closing the wind turbine blades. The disadvantages of this method are: in driving the wind turbine blade mold for opening and closing, the hydraulic mold opening and closing mechanism driven by the double cylinders has two mechanical dead points, and the cylinders cannot switch the moving direction without the help of the electromagnetic directional valves. In that case, the wind turbine blade mould connected to the hydraulic mould opening and closing mechanism will vibrate and the hydraulic system will also be subjected to shocks, which will in the long term have an effect on both the hydraulic system and the wind turbine blade mould.

The second technique is to use a single cylinder to drive the hydraulic mold opening and closing mechanism. Although this structure solves the problem of the first technique, it requires the bottom articulated arm to be integrally connected to the articulated beam tie plate by a main cylindrical pin, and the articulated arm to be assembled with the articulated beam by a fastener passing through a fixing hole of the articulated beam tie plate, which is complicated in structure and high in cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims at: in order to overcome the disadvantages of the prior art, the articulated arm for rotating a wind turbine blade mould according to the invention is of low construction cost and simple construction.

The solution is as follows: in order to achieve the above object, the hinge arm structure for turning wind turbine blade moulds according to the invention is characterized in that the hinge mechanism comprises a swivel pin defining a hinge axis, the top hinge arm comprises a pair of top hinge arms assembled together by a first top hinge arm plate and a second top hinge arm plate to form a space between them, the bottom hinge arm is received in said space, and the swivel pin extends through said pair of top hinge arms and a bottom hinge arm located between said pair of top hinge arms, the swivel pin extends through a first hole in the bottom hinge arm and through a pair of second holes, each second hole is located in a respective top hinge arm plate of the top hinge arm, the first hole and the second hole are aligned.

The assembly of the two top articulated arm panels results in a top articulated arm that is lightweight, structurally strong, and low cost. The pivot pin may exhibit high shear strength by passing through a pair of first and second top articulated armplates and a bottom articulated arm sandwiched between the pair of first and second top articulated armplates.

As another embodiment of the present invention, the articulated arm structure further comprises: a mounting plate having an inner surface abutting one end of the pivot pin and abutting a surface of the top hinge arm lateral to one of the second apertures, the mounting plate attached to the top hinge arm; a gasket located on an outer surface of the mounting plate; and a fixed member extending through the washer and the mounting plate and attached to the rotation pin such that the rotation pin is rotatable about the hinge axis at least in the first aperture, and the rotation pin is translationally fixed in the first and second apertures by the fixed member. This construction of the rotation pin and the associated fixing mechanism comprising the mounting plate, the washer and the fixing member is characterized by low cost, high manufacturing yield and easy operation without any special mounting kit.

As another embodiment of the present invention, the rotation pin is rotatable about the hinge axis in the pair of second holes.

As another embodiment of the present invention, the fixing member has a threaded end screwed into the rotation pin and an opposite head end adjacent to an outer surface of the washer.

As another embodiment of the present invention, the opposite head end can rotate against the outer surface of the washer.

As another embodiment of the present invention, the washer and the rotation pin are assembled together by the fixing member, and the washer and the rotation pin can rotate relative to the mounting plate.

As another embodiment of the present invention, the mounting plate is attached to the top hinge arm by a plurality of threaded members that extend through the mounting plate and are threaded to the top hinge arm.

As another embodiment of the present invention, a pair of top articulated arm plates are assembled together by welding. The welding of the two top articulating arm plates results in a top articulating arm that is lightweight, structurally strong, low cost, and easy to manufacture.

As another embodiment of the present invention, the pair of top articulated arm panels have matching shapes and sizes.

As another embodiment of the present invention, opposing inner surfaces of a pair of top articulating armplates are provided with opposing corresponding cylindrical pin housings for mounting an upper cylindrical mounting pin in a top articulating arm.

As another embodiment of the present invention, the opposite inner surfaces of the pair of top articulated arm plates are provided with respective structural spacers for providing a space having a predetermined width, and/or the pair of top articulated arm plates are connected by a jack-mounting spacer located on a first edge of the top articulated arm and/or by a climbing hook located on a second edge of the top articulated arm. These elements ensure a reliable connection between the top articulated arm panels to form a structurally strong top articulated arm.

As another embodiment of the invention, the articulated arm structure comprises a pair of articulated mechanisms spaced apart from each other by a spacing in a direction parallel to the articulation axis and the rotation pins of the respective articulated mechanisms are aligned along a common articulation axis, and wherein an upper cylindrical mounting pin is fitted in the spacing between the top articulated arms of the pair of articulated mechanisms.

As another embodiment of the present invention, the lower cylindrical mounting pin fits within the gap between the bottom hinge arms of the pair of hinge mechanisms.

As another embodiment of the present invention, the hydraulic cylinder and piston assembly is mounted between a pair of upper cylindrical mounting pins and lower cylindrical mounting pins.

As another embodiment of the present invention, the bottom articulated arm is assembled to the articulated beam by a fixing assembly comprising a pair of articulated beam tie plates mounted at respective opposite sides of a pair of articulated mechanisms, a lower cylindrical mounting pin passes through an upper end of each articulated beam tie plate and through the bottom articulated arm of a pair of articulated mechanisms, and a lower end of each articulated beam tie plate is assembled to the articulated beam. The use of an articulated beam tie-down plate to connect the bottom articulated arm by at least one lower cylindrical mounting pin reduces production costs. The bottom articulated arm and the articulated beam are connected by an articulated beam tie-down plate, which may increase the connection point between them and improve the stress structure at the joint of the bottom articulated arm and the articulated beam.

As another embodiment of the present invention, the fixing assembly comprises a first pair of articulated beam restraint plates and a second pair of articulated beam restraint plates, the articulated arm structure comprises a pair of lower cylindrical mounting pins, wherein the first pair of articulated beam restraint plates and the second pair of articulated beam restraint plates are spaced apart along a longitudinal direction of the articulated beam, and each of the first pair of articulated beam restraint plates and the second pair of articulated beam restraint plates are assembled to the articulated beam through the corresponding lower cylindrical mounting pins.

As another embodiment of the present invention, a pair of upper cylindrical mounting pins are fitted within the gap between the top articulated arms of a pair of articulated mechanisms, and a corresponding hydraulic cylinder and piston assembly is installed between each pair of upper cylindrical mounting pins and lower cylindrical mounting pins.

As another embodiment of the present invention, the lower end of each articulated beam tie plate is assembled to the articulated beam through a plurality of threaded elements and a corresponding articulated beam interface plate attached to the articulated beam, the plurality of threaded elements assemble the lower end of the corresponding articulated beam tie plate to the corresponding articulated beam interface plate. The hinge beam tie plate and threaded hinge beam interface plate increase the connection point between the bottom hinge arm and the hinge beam and improve the stress structure at the junction of the bottom hinge arm and the hinge beam.

As another embodiment of the present invention, the leveling mechanism is disposed between the bottom articulated arm and the articulated beam, wherein the leveling mechanism includes a partially circular locating pin attached to the articulated beam, the partially circular locating pin having a partially circular upper support surface.

As another embodiment of the present invention, the part-circular positioning pin is semicircular, and the upper supporting surface is semicircular.

As another embodiment of the present invention, the leveling mechanism includes a plurality of shims between the bottom articulated arm and the articulated beam.

Has the advantages that: compared with the prior art, an articulated arm structure for rotating wind turbine blade mould has following advantage:

1. the top articulated arm obtained by welding the two top articulated arm plates has light weight, high structural strength and low cost;

2. the use of the articulated beam tie plate and the connection of the lower cylindrical mounting pin to the bottom articulated arm reduces production costs;

3. the bottom articulated arm and the articulated beam can increase the connection point between the bottom articulated arm and the articulated beam and improve the stress structure at the joint of the bottom articulated arm and the articulated beam through the articulated beam connecting plate and the articulated beam interface plate and the connection of the bottom articulated arm and the articulated beam interface plate through the threaded element;

4. the top and bottom articulated arms connected by the main pivot pin are characterized by low cost, high manufacturing throughput, and ease of operation without the need for any special installation kits.

Drawings

Embodiments of the invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

fig. 1a and 1b are schematic side views of a wind turbine blade mould comprising an articulated arm structure according to an embodiment of the invention, the wind turbine blade mould being in an open position in fig. 1a and in a closed position in fig. 1 b;

FIG. 2 is a detailed schematic perspective view of a top articulated arm structure on an articulated beam of the wind turbine blade mould of FIGS. 1a and 1b, FIG. 2 omitting an upper mould and a lower mould, the articulated arm structure being illustrated in an open position;

FIG. 3 is an enlarged schematic perspective view of an upper portion of the hinged arm structure shown in FIG. 2, with a portion of the hinged arm structure cut away;

FIG. 4 is an exploded schematic perspective view of a top hinged arm of the hinged arm construction shown in FIG. 2;

FIG. 5 is a schematic perspective view of the interior surface of the top hinge plate of the top hinge arm of the hinge arm construction shown in FIG. 2;

FIG. 6 is a schematic perspective view of a top hinge arm of the hinge arm construction shown in FIG. 2 assembled from a pair of top hinge plates; and

fig. 7 is an exploded schematic perspective view of the hinge arm structure of the hinge beam shown in fig. 2, showing the hinge arm structure assembled to the hinge beam.

Detailed Description

The invention is further described with reference to the following figures and examples.

Referring to fig. 1 to 7, the present invention provides in a preferred embodiment an articulated arm structure for rotating a wind turbine blade mould 2.

As shown in particular in fig. 1a and 1b, the articulated arm structure 100 comprises an articulated mechanism 1, the articulated mechanism 1 comprising a bottom articulated arm 3 and a top articulated arm 5, the bottom articulated arm 3 being for fitting to a lower mould part 4 of a wind turbine blade mould 2 and the top articulated arm 5 being for fitting to an upper mould part 6 of the wind turbine blade mould 2. The hinge mechanism 1 pivotally connects the top hinge arm 5 to the bottom hinge arm 3 to allow the top hinge arm 5 to pivot about a hinge axis between a lower position as shown in fig. 1a and an upper position as shown in fig. 1 b. In the lower position the wind turbine blade mould 2 is in the open configuration and the upper mould portion 6 is transverse to the lower mould portion 4, whereas in the upper position the wind turbine blade mould 2 is in the closed configuration and the upper mould portion 6 is above the lower mould portion 4.

As shown in particular in fig. 2 to 6, the upper and

lower mould portions

4, 6 have been omitted for clarity, the articulated arm structure 100 comprising a pair of articulated mechanisms 1 spaced from each other by a spacing S1 in a direction parallel to the articulation axis H-H. The bottom articulated arm 3 is attached, preferably by welding, to a transverse support plate 95 which helps to define the spacing S1 between the pair of articulated mechanisms 1. The transverse support plate 95 is provided with mounting points 99 for mounting the lower mould section 4 to the articulated arm structure 100. Each hinge mechanism 1 comprises a rotation pin 8 defining a hinge axis H-H. The rotation pins 8 of the respective hinge mechanisms 1 are aligned along a common hinge axis H-H.

The pivot pin 8 extends through a first hole 9 in the bottom hinge arm 3 and a second hole 10 in the top hinge arm 5, the first hole 9 and the second hole 10 being aligned.

The mounting plate 11 has an inner surface 12 that abuts an end 20 of the pivot pin 8. The inner surface 12 also abuts a surface 13 of the top hinge arm 5 flanking the second hole 10.

A mounting plate 11 is attached to the top articulating arm 5. In the illustrated embodiment, the mounting plate 11 is attached to the top hinge arm 5 by a plurality of threaded members that extend through the mounting plate 11 and are threaded to the top hinge arm 5.

The gasket 14 is located on the outer surface 23 of the mounting plate 11. The fixing member 15 extends through the washer 14 and the mounting plate 11 and is attached to the rotation pin 8.

The rotation pin 8 is rotatable around the hinge axis H-H within at least the first hole 9 and is fixed in translation in the first hole 9 and in the second hole 10 by means of a fixing member 15.

The fixing member 15 has a threaded end 16, which threaded end 16 is screwed into the rotation pin 8, and an opposite head end 17, which is adjacent to a washer outer surface 18 of the washer 14. Generally, the opposite head end 17 is rotatable relative to the washer outer surface 18 of the washer 14. The washer 14 and the rotation pin 8 are assembled together by the fixing member 15. Preferably, the washer 14 and the rotation pin 8 are rotatable relative to the mounting plate 11.

In the shown embodiment the rotation pin 8 is also rotatable in the second hole 10 around the hinge axis H-H, so that the rotation pin 8 is freely rotatable in both the first hole 9 and the second hole 10. This may be achieved by mounting the washer 14 to be rotatable relative to the fixed mounting plate 11.

In an alternative embodiment, the rotation pin 8 is not yet able to rotate in the second hole 10 around the hinge axis H-H, so that the rotation pin 8 is free to rotate in the first hole 9 but not in the second hole 10. This may be achieved by mounting the washer 14 attached to the fixed mounting plate 11 and thus not rotatable relative to the fixed mounting plate 11.

In each embodiment of the present invention, the top articulated arm 5 is fitted with a mounting plate 11 and a washer 14 to limit the translational movement of the rotation pin 8. The mounting plate 11, washer 14 and securing member 15 serve to prevent the pivot pin 8 from accidentally, partially or completely sliding out of the top articulating arm 5. However, the rotation pin 8 can be easily mounted in the top hinge arm 5 by sliding the rotation pin 8 from the outside of the hinge arm structure 1 into the second hinge hole 10 and also into the first hole 9 of the bottom hinge arm. The pivot pin 8 is then securely and easily translationally secured in the top hinge arm 5 by securing the mounting plate 11 to the top hinge arm 5 and then securing the washer 14 to the pivot pin by the securing member 15.

The structure of the top articulating arm 5 will now be described with particular reference to figures 4 to 6.

In the illustrated embodiment, the top hinge arm 5 includes a pair of top hinge arm plates 19 that are assembled together, preferably by welding, to form a space S2 therebetween. Typically, the pair of top articulated arm plates 19 are of matching shape and size.

The bottom articulated arm 3 is received within space S2. The pivot pin 8 extends through the pair of top hinge arms 19 and the bottom hinge arm 3 between the pair of top hinge arms 19.

The opposite inner surfaces 21 of the pair of top articulated arm panels 19 are provided with respective structural spacers 24 for providing a space S2 of a predetermined width. In the assembled top articulated arm 5, the pair of top articulated arm plates 19 are connected by a jack mount spacer 25 located on a first edge 26 of the top articulated arm 5 and by a climbing hook 27 located on a second edge 28 of the top articulated arm 5.

The opposite inner surfaces 21 of the pair of top articulated arm plates 19 are provided with respective opposite cylindrical pin housings 22. The upper cylindrical mounting pin 52 is mounted in the opposed cylindrical pin housings 22 of the pair of top hinge arm plates 19, and the upper cylindrical mounting pin 52 fits within the space S1 between the top hinge arms 5 of the pair of hinge mechanisms 1.

The lower cylindrical mounting pin 54 fits within the space S1 between the bottom hinge arms 3 of the pair of hinge mechanisms 1.

In the articulated arm structure 1, a hydraulic cylinder and piston assembly 90 is mounted between a pair of upper 52 and lower 54 cylindrical mounting pins. Extension of the hydraulic cylinder and piston assembly raises the top articulated arm 5 to close the mould 2, whereas retraction of the hydraulic cylinder and piston assembly lowers the top articulated arm 5 to open the mould 2. In one embodiment of the present invention, only one hydraulic cylinder and piston assembly is provided.

In the preferred embodiment illustrated, two upper cylindrical mounting pins 52 are provided, and correspondingly two lower cylindrical mounting pins 54 are provided. A respective hydraulic cylinder and piston assembly 90 is mounted between each pair of respective upper and lower cylindrical mounting pins 52, 54. The preferred arrangement of the two mounted hydraulic cylinders and piston assemblies avoids any mechanical dead-spots during the opening and closing of the mould 2. In the shown preferred embodiment, it is also possible to open and close the mould 2 without any undesired vibrations.

As shown particularly in fig. 7, the bottom articulated arm 3 is mounted to the articulated beam 50 by a fixed assembly 56 comprising a pair of articulated beam tie plates 58. The hinge beam trap plates 58 are mounted on opposite sides of the pair of hinge mechanisms 1. A lower cylindrical mounting pin 54 passes through the upper end 60 of each hinge beam tie-down plate 58 and through the bottom hinge arm 3 of the pair of hinge mechanisms 1. The lower end 62 of each hinge beam tie plate 58 is assembled to the hinge beam 50. In the illustrated embodiment, the securing assembly 56 includes first and second pairs of hinged beam restraint panels 58, wherein the first and second pairs of hinged beam restraint panels 58 are spaced apart along the longitudinal direction L-L of the hinged beam 50.

The lower end 62 of each articulated beam restraint plate 58 is assembled to the articulated beam 50 by being attached (preferably by welding) to a respective articulated beam interface plate 70 of the articulated beam 50. A plurality of threaded elements 72 assemble the lower end 62 of the respective hinge beam tie plate 58 to the respective hinge beam interface plate 70.

In the embodiment shown, the leveling mechanism 80 is provided between the bottom articulated arm 3 and the articulated beam 50. The leveling mechanism 80 includes a partially circular (preferably semi-circular) locating pin 82 attached to an upper surface 96 of the articulated beam 50, the partially circular locating pin 82 having an upper support surface 84 that is partially circular, preferably semi-circular. Typically, the leveling mechanism 80 further comprises a plurality of shims 86 between the bottom articulated arm 3 and the articulated beam 50.

To assemble the articulated arm structure 1, an articulated beam interface plate 70, which is provided with threaded bores 98 for receiving the threaded elements 72, is typically welded to the articulated beam 50. The bottom articulated arm 3 is assembled with the articulated beam tie-down plate 58 using the lower cylindrical mounting pin 54 to form an integral component before the bottom articulated arm 3 is placed on the articulated beam 50. Thereafter, the hinge beams 50 and the bottom hinge arm 3 are secured together using the spacer 86 and the threaded member 72 that assembles the lower end 62 of the respective hinge beam restraint plate 58 to the respective hinge beam interface plate 70. Threaded member 72 passes through a hole 97 in hinge beam tie plate 58 and screws into a threaded hole 98 in hinge beam interface plate 70. The semi-circular locating pins 82 and spacers 86 (if required) provide a supporting contact between the bottom hinge arm 3 and the hinge beam 50 to level the bottom hinge arm 3. After leveling, the semi-circular locating pin 82 may be welded to the upper surface 96 of the hinge beam 50 at a desired location.

The above-mentioned embodiments are only used for illustrating the technical idea and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention is not limited by the embodiments. Any equivalent variations or modifications made according to the spirit of the present invention shall fall within the protection scope of the present invention.

Claims

1. An articulated arm structure for turning a wind turbine blade mould (2), wherein the articulated arm structure (100) comprises: a bottom articulated arm (3) fitted to a lower mould part (4) of a wind turbine blade mould (2); a top articulated arm (5) fitted to an upper mould part (6) of a wind turbine blade mould (2); and a hinge mechanism (1), said hinge mechanism (1) pivotally connecting the top hinge arm (5) to the bottom hinge arm (3) to allow the top hinge arm (5) to pivot about a hinge axis (H-H) between a lower position and an upper position, characterized in that said hinge mechanism (1) comprises a pivot pin (8) defining the hinge axis (H-H), the top hinge arm (5) comprises a pair of top hinge arms (19) assembled together by a first top hinge arm plate and a second top hinge arm plate to form a space (S2) therebetween, the bottom hinge arm (3) is received within said space (S2), and the pivot pin (8) extends through said pair of top hinge arms (19) and the bottom hinge arm (3) between said pair of top hinge arms, the pivot pin (8) extends through a first hole (9) in the bottom hinge arm (3) and through a pair of second holes (10) ) Each second hole (10) is located in a respective top articulated arm plate (19) of the top articulated arm (5), the first holes (9) and the second holes (10) being aligned.

2. The articulated arm structure for turning wind turbine blade moulds of claim 1, characterised in that the articulated arm structure (100) further comprises: a mounting plate (11), the inner surface (12) of which abuts against the end (20) of the rotation pin (8) and against a surface (13) of the top articulated arm (5) lateral to one of the second holes (10), the mounting plate (11) being attached to the top articulated arm (5); a gasket (14) located on an outer surface (23) of the mounting plate (11); and a fixing member (15) extending through the washer (14) and the mounting plate (11) and attached to the rotation pin (8), wherein the rotation pin (8) is rotatable around the hinge axis (H-H) at least in the first hole (9) and the rotation pin is translationally fixed in the first hole (9) and the second hole (10) by the fixing member (15).

3. The articulated arm structure for turning wind turbine blade moulds according to claim 2, characterised in that the turning pin (8) is turnable around the hinge axis (H-H) in the pair of second holes (10).

4. The articulated arm structure for turning wind turbine blade moulds as claimed in claim 2, characterised in that the fixating member (15) has a threaded end (16) and an opposite head end (17), the threaded end (16) being screwed into the turning pin (8), the opposite head end being adjacent to a washer outer surface (18) of a washer (14).

5. The articulated arm structure for turning wind turbine blade moulds of claim 4, wherein the opposite head end (17) is rotatable against a washer outer surface (18) of the washer (14).

6. The articulated arm structure for turning wind turbine blade moulds according to claim 2, characterised in that the washer (14) and the turning pin (8) are fitted together by the fixing member (15), the washer (14) and the turning pin (8) being turnable in relation to the mounting plate (11).

7. The articulated arm structure for turning wind turbine blade moulds of claim 2, characterized in that the mounting plate (11) is attached to the top articulated arm (5) by a plurality of threaded members extending through the mounting plate (11) and screwed into the top articulated arm (5).

8. The articulated arm structure for turning wind turbine blade moulds of claim 1, characterised in that the pair of top articulated arm plates (19) are assembled together by welding.

9. The articulated arm structure for turning wind turbine blade moulds of claim 1, characterised in that the pair of top articulated arm plates (19) have matching shape and size.

10. The articulated arm structure for turning wind turbine blade moulds of claim 1, characterised in that the opposite inner surfaces (21) of the pair of top articulated arm plates (19) are provided with opposite respective cylindrical pin housings (22) for mounting an upper cylindrical mounting pin (52) in the top articulated arm (5).

11. The articulated arm structure for turning wind turbine blade moulds of claim 1, characterised in that the opposite inner surfaces (21) of the pair of top articulated arm panels (19) are provided with respective structural spacers (24) for providing a space (S2) having a predetermined width.

12. The articulated arm structure for turning wind turbine blade moulds of claim 1, c h a r a c t e r i z e d in that the pair of top articulated arm plates (19) are connected by a jack mounting spacer (25) on the first edge (26) of the top articulated arm (5).

13. The articulated arm structure for turning wind turbine blade moulds of claim 1, characterised in that the pair of top articulated arm plates (19) are connected by climbing hooks (27) on the second edge (28) of the top articulated arm (5).

14. The articulated arm structure for turning wind turbine blade moulds of claim 1, characterised in that the articulated arm structure (100) comprises a pair of articulated mechanisms (1) spaced apart from each other by a spacing (S1) in a direction parallel to the articulation axis (H-H), the turning pins (8) of the respective articulated mechanisms (1) are aligned along the same articulation axis (H-H), and the upper cylindrical mounting pin (52) is fitted within the spacing (S1) between the top articulated arms (5) of a pair of articulated mechanisms (1).

15. The articulated arm structure for turning wind turbine blade moulds of claim 14, characterised in that the lower cylindrical mounting pin (54) is fitted within the space (S1) between the bottom articulated arms (3) of the pair of articulated mechanisms (1).

16. The articulated arm structure for turning wind turbine blade moulds of claim 15, characterised in that a hydraulic cylinder and piston assembly (90) is mounted between a pair of upper cylindrical mounting pins (52) and lower cylindrical mounting pins (54).

17. The articulated arm structure for turning wind turbine blade moulds according to claim 15, characterised in that the bottom articulated arm (3) is fitted on the articulated beam (50) by a fixing assembly (56) comprising a pair of articulated beam tie plates (58), wherein the articulated beam tie plates (58) are mounted on respective opposite sides of the pair of articulated mechanisms (1), a lower cylindrical mounting pin (54) passes through an upper end (60) of each articulated beam tie plate (58) and through the bottom articulated arm (3) of the pair of articulated mechanisms (1), a lower end (62) of each articulated beam tie plate (58) being fitted to the articulated beam (50).

18. The articulated arm structure for turning wind turbine blade moulds of claim 17, wherein the fixing assembly (56) comprises a first and a second pair of articulated beam tie plates (58) and the articulated arm structure comprises a pair of lower cylindrical mounting pins (54), the first and second pair of articulated beam tie plates (58) being spaced apart along the longitudinal direction (LL) of the articulated beam (50), each of the first and second pair of articulated beam tie plates (58) being fitted to the articulated beam (50) by a respective lower cylindrical mounting pin (54).

19. The articulated arm structure for turning wind turbine blade moulds of claim 18, characterised in that a pair of upper cylindrical mounting pins (52) is fitted within the space (S1) between the top articulated arms (5) of the pair of articulated mechanisms (1), a respective hydraulic cylinder and piston assembly (90) being mounted between each pair of respective upper cylindrical mounting pins (52) and lower cylindrical mounting pins (54).

20. The articulated arm structure for turning a wind turbine blade mould according to claim 18, wherein the lower end (62) of each articulated beam tie plate (58) is fitted to the articulated beam (50) by a respective articulated beam interface plate (70) attached to the articulated beam (50), the plurality of threaded elements fitting the lower end (62) of the respective articulated beam tie plate (58) to the respective articulated beam interface plate (70).

21. The articulated arm structure for turning wind turbine blade moulds of claim 17, wherein a leveling mechanism (80) is provided between the base articulated arm (3) and the articulated beam (50), wherein the leveling mechanism (80) comprises a part circular positioning pin (82) attached to the upper surface (96) of the articulated beam (50), the part circular positioning pin (82) having a part circular upper support surface (84).

22. The articulated arm structure for turning wind turbine blade moulds of claim 21, wherein the part circular positioning pin (82) is semi-circular and the upper support surface (84) is semi-circular.

23. The articulated arm structure for turning wind turbine blade moulds of claim 21, wherein the levelling mechanism (80) comprises a plurality of shims (86) between the bottom articulated arm (3) and the articulated beam (50).