WO2013023347A1

WO2013023347A1 - Foldable boom structure and method for unfolding and folding the foldable boom structure

Info

Publication number: WO2013023347A1
Application number: PCT/CN2011/078382
Authority: WO
Inventors: 涂凌志; 王金华; 王洪海
Original assignee: 长沙中联重工科技发展股份有限公司; 湖南中联重科专用车有限责任公司
Priority date: 2011-08-12
Filing date: 2011-08-12
Publication date: 2013-02-21

Abstract

Disclosed are a foldable boom structure and a folding and unfolding method thereof. The foldable boom structure comprises a main arm (10), a strut mechanism (20) and a secondary arm (30) mounted on the main arm, and a steel rope (40) wound by a winch and supported by the strut mechanism. The secondary arm comprises a secondary arm front segment (31) and a secondary arm rear segment (32) pivotably connected with each other. An end of the steel rope is connected to the secondary arm in a dismountable manner. The foldable boom structure further comprises a pulling plate (50). The pulling plate at least comprises a dismountable first part (51) and second part (52) that are pivotably connected with each other. The first part and the second part are respectively connected to the secondary arm front segment and the strut mechanism. By means of the foregoing technical solution, the secondary arm may be folded or unfolded through the pulling plate and the steel rope, thereby improving the lifting performance and reducing the requirement on the strength of the steel rope. In addition, auxiliary devices such as an auxiliary crane are no longer required, and dangerous operations are no longer required to be performed manually.

Description

Folding boom structure and method of unfolding and folding the folding boom structure

The present invention relates to a folding boom structure and a method of unfolding and folding the folding boom structure. Background technique

For large engineering equipment such as cranes, in order to reduce the assembly time of the boom system, and to reduce the height of the crane transition and improve the driving stability, a folding boom structure is usually adopted, for example, it is particularly suitable for a hoisting crane for a wind farm. Boom system.

The existing folding boom structure is as shown in FIGS. 1 to 4, and includes a main arm 10, a support rod mechanism 20 and a sub-arm 30 mounted on the main arm 10, a hoist and a winding machine and a support rod mechanism. The 20-supported cable 40, the jib 30 includes a jib front section 31 and a jib rear section 32 that are pivotally coupled to each other. The support rod mechanism 20 includes a fixed support rod 21 and a pitch support rod 22 fixed to the main arm 10, the pitch support rod 22 is pivotally connected to the fixed support rod 21, and one end of the cable 40 is connected to The front end of the anterior segment 31 of the jib.

Figure 1 shows a schematic view of the folding boom structure in a folded state, in which the jib 30 of the folding boom structure needs to be deployed to the unfolded state shown in Figure 4. The specific unfolding operation is as follows: First pivoting the pitch support rod 22 and releasing the cable 40 through the hoist, so that the jib front section 31 pivots relative to the jib rear section 32 and lowers the position (eg, lowered to the ground, as shown in FIG. 2) Then, the cable 40 is wound by a hoist and the pivotal position of the jib rear section 32 and the jib front section 31 is lifted by an auxiliary crane (not shown), as shown in FIG. 3; finally, the jib front section 31 and the jib rear section are finally made. 32 is flush (ie unfolded) and the cable 40 is tensioned, as shown in FIG. When not in use or maintenance, the jib 30 needs to be folded from the unfolded state to the folded state, the order of operation being reversed from the order of the above-described unfolding operation.

During the above operation, the cable 40 functions as a deployment control in the process of lowering the front section 31 of the jib, and functions as a lifting force to balance the lifting weight during operation. Due to rope The cable is limited by the diameter and provides a limited pulling force, so the lifting weight is generally small, about 100 tons or less. In addition, in the unfolding operation, the auxiliary crane is required to complete the unfolding action, and the auxiliary equipment is highly dependent, the preparation time is long, and the efficiency is low. In addition, when using the auxiliary crane, it is necessary to manually climb to the pivot joint of the front section 31 of the jib and the rear section 32 of the jib (up to more than 20 meters). The hook of the auxiliary crane is connected, which is labor intensive, difficult and safe to operate. Poor sex. Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to provide a folding boom structure that facilitates folding and unfolding and that ensures high hoisting performance and safety, as well as a method of folding and unfolding thereof.

In order to achieve the above object, the present invention provides a folding boom structure including a main arm, a support rod mechanism and a sub-arm mounted on the main arm, a hoist and being wound by the hoist and by the a steel cable supported by the support rod mechanism, the auxiliary arm including a jib front section and a jib rear section pivotally coupled to each other, wherein one end of the cable is detachably coupled to the jib, the folding arm The frame structure further includes a pull plate, the pull plate including at least a first portion and a second portion that are detachably and pivotally connected, the first portion and the second portion respectively associated with the jib front portion and the support rod mechanism connection.

Preferably, one end of the cable is selectively coupled to the front section of the jib and the rear section of the jib.

Preferably, one end of the cable is selectively coupled to a front end of the front section of the jib and a front end of the rear section of the jib.

Preferably, the pull plate comprises a plurality of pull plate units that are pivotally and detachably connected to each other. Preferably, the pull plate comprises a wire rope connecting at least two adjacent ones of the pull plate units.

Preferably, the folding boom structure includes locking means for locking the pivotal connection of the front section of the jib and the rear section of the jib.

Preferably, the jib front section and the jib rear section are each provided with a pin hole, and the lock is mounted A lock pin that can be inserted into the pin hole and a drive device that drives the lock pin are included.

Preferably, the support bar mechanism includes a fixed support bar and a pitch support bar, the fixed support bar is fixed on the main arm, and the pitch support bar is pivotally connected to the fixed support bar, Two parts are connected to the pitch support bar.

The present invention also provides a method of unfolding a folding boom structure, the method comprising: (a) releasing the cable by the hoist such that the front section of the jib pivots relative to the rear section of the jib and lowers Positioning; (b) connecting the first portion and the second portion; (c) detaching one end of the cable from the jib and connecting to the jib downstream of the original joint; (d) winding the wire by the hoist to tension the pull plate and extending the front section of the jib to be flush with the rear section of the jib.

Preferably, in step (C), one end of the cable is detached from the front end of the front section of the jib and connected to the front end of the rear section of the jib.

Preferably, the method further comprises: (e) locking the front section of the jib and the rear section of the jib in a state of being stretched to a flush state.

The present invention also provides a folding method of a folding boom structure, the method comprising: (a) releasing the cable by the hoist such that the front section of the jib pivots relative to the rear section of the jib and lowers Positioning; (b) disconnecting the first portion and the second portion; (c) detaching one end of the cable from the jib and connecting to the jib at the original joint Upstream; (d) winding the wire by the hoist to fold the front section of the jib and bringing the first portion and the second portion into close proximity to each other.

Preferably, in step (C), one end of the cable is detached from the front end of the rear section of the jib and connected to the front end of the front section of the jib.

Through the above technical solution, the jib can be folded or unfolded together by the pull plate and the steel cable, so that the pull plate and the steel cable are subjected to the load together, the hoisting performance is improved and the requirement for the strength of the steel cable is lowered. In addition, by changing the connection position of the cable and the jib, it can be folded or unfolded only by the cable and the pull plate, thereby eliminating the need for auxiliary equipment such as auxiliary cranes, and eliminating the need for manual danger. Sexual operation.

Other features and advantages of the invention will be described in detail in the detailed description which follows. DRAWINGS

The drawings are intended to provide a further understanding of the invention, and are in the In the drawing:

1 to 4 are schematic views illustrating a developing operation of a folding arm frame structure of the prior art; and Figs. 5 to 9 are views showing a developing operation of an embodiment of the folding arm frame structure of the present invention;

Fig. 10 is a view showing the structure of a pull plate composed of a pull plate unit of the present invention. Description of the reference numerals

10: Main arm 20: Support rod mechanism 21: Fixed support rod 22: Pitch support rod 30: Sub-arm 31: Front side of jib 32: Rear part of jib 40: Steel rope

50: Pull plate 51 : Part 1 52: Part 2 53: Pull plate

60: pulley, specific implementation

The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are intended to be illustrative and not restrictive.

In the present invention, the orientation words such as "up, down, left, and right" as used herein generally refer to the upper, lower, left, and right as shown in the accompanying drawings; "inside and outside". Means relative to The inside and outside of the outline of each component itself. In addition, the upstream and downstream directions refer to the direction from the front section of the jib to the rear section of the jib.

According to an aspect of the invention, there is provided a folding boom structure comprising a main arm 10, a support rod mechanism 20 and a sub-arm 30 mounted on the main arm 10, a hoist and winding by the hoist And a cable 40 supported by the support bar mechanism 20, the jib 30 includes a jib front section 31 and a jib rear section 32 pivotally coupled to each other, wherein one end of the cable 40 is detachably connected In the jib 30, the folding jib structure further includes a pull plate 50, the pull plate 50 including at least a first portion 51 and a second portion 52 that are detachably and pivotally connected, the first portion 51 and the The second portion 52 is coupled to the jib front section 31 and the support rod mechanism 20, respectively.

When folding or unfolding the folding boom structure of the present invention, the pull plate 50 can apply a pulling force to the secondary arm 30 together with the cable 40, so that the pull plate 50 and the cable 40 bear the load of the auxiliary arm 30. Therefore, the folding boom structure of the present invention can bear a larger load under the additional pulling force provided by the pull plate 50, thereby improving the lifting performance of the folding boom structure. In addition, since the auxiliary function is provided by the pull plate 50, the requirement for the strength of the cable 40 can be reduced, so that the cable 40 having a moderate strength can be used, which saves cost.

Preferably, as shown in Figures 6 and 7, one end of the cable 40 is selectively coupled to the jib front section 31 and the jib rear section 32. With this arrangement, in the process of folding or unfolding the jib 30, the cable 40 can be selectively coupled to the jib front section 31 and the jib rear section 32 in different steps, thereby assisting the pull plate 50. It is easy to complete the folding or unfolding operation. The specific operation will be described in detail below in connection with the method of folding and unfolding the boom structure of the present invention.

More preferably, one end of the cable 40 is selectively coupled to the front end of the jib front section 31 and the front end of the jib rear section 32 to be selectively coupled to the jib front section 31 and the jib At the time of the segment 32, the greatest possible moment is applied to the jib front section 31 or the jib rear section 32.

In a preferred embodiment of the present invention, as shown in FIG. 5 to FIG. 10, the pull plate 50 includes A plurality of pull plate units 53 that are pivotally and detachably connected to each other. The pull tab 50 can be made "flexible" and adjustable in length by providing pull tab units 53 that are pivotally and detachably coupled to each other.

Here, "flexible" means that the displacement can be adaptively applied according to the relative positions of the jib front section 31 and the jib rear section 32, and the jib 30 is gradually pulled with the displacement. It is to be understood that the first portion 51 and the second portion 52 shown in FIGS. 5 to 9 are "rigid" (linear shape) for convenience of explanation, but actually the first portion 51 and the second portion 52 may be "flexible" as described above. "Shows a curved shape. In addition, the length of the pull plate 50 can be adjusted by providing an appropriate number of pull plate units 53, so that it can be applied to different types of boom structures.

Further, when the folding boom structure is in the folded state, as shown in Fig. 5, the first portion 51 and the second portion 52 may interfere with each other by folding, and may thus be stuck to each other and cannot move. This interference can be avoided by adjusting the length of the pull plate 50 in a timely manner.

Preferably, the pull plate 50 may include a wire rope connecting at least two adjacent ones of the pull plate units 53. By using a wire rope instead of a partial length, the total weight of the pull plate 50 can be reduced and the cost can be saved.

Additionally, the folding boom structure includes a locking device for locking the pivotal connection of the jib front section 31 and the jib rear section 32, thereby locking the folding boom structure by the locking device Expand the state to work in the expanded state.

Here, the locking device may be any suitable mechanism as long as the folding boom structure can be locked in the unfolded state. For example, the jib front section 31 and the jib rear section 32 may each be provided with a pin hole, and the locking device includes a lock pin that can be inserted into the pin hole and a driving device that drives the lock pin. For ease of operation, the drive unit can be a hydraulic cylinder or the like.

In addition, as shown in FIGS. 5 to 9, the support bar mechanism 20 may include a fixed support bar 21 and a pitch support bar 22, and the fixed support bar 21 is fixed to the main arm 10, and the pitch support bar 22 It is pivotally connected to the fixed support rod 21, and the second portion 52 is connected to the pitch support rod 22. Among them, the cable 40 can be connected to the jib 30 by bypassing the pulley 60 provided on the fixed support rod 21 and bypassing the free end of the pitch support rod 22. Therefore, by making the pitch support The lever 22 pivots relative to the fixed support bar 21, and the length of the cable 40 and the pull plate 50 can be adjusted and can assist in lifting and lowering the jib 30 during folding or unfolding operations.

According to another aspect of the present invention, there is provided a method of unfolding a folding boom structure (previously the folding boom structure is in a folded state, as shown in Figure 5), the method comprising: (a) releasing the cable through the winch 40, causing the jib front section 31 to pivot relative to the jib rear section 32 and lowering the position (eg, to the ground), as shown in FIG. 6; (b) connecting the first portion 51 and the first a second portion 52; (c) detaching one end of the cable 40 from the jib 30 and connecting to the downstream of the jib 30 at the original joint, as shown in FIG. 7; (d), passing The hoist winds the cable 40 (shown in Figure 8) to tension the pull plate 50 and extend the jib front section 31 to be flush with the jib rear section 32 (Fig. 9). Shown).

Among them, it can be understood that "downstream" refers to the direction from the jib front section 31 to the jib rear section 32. In other words, the jib rear section 32 is located downstream of the jib front section 31.

To prevent the first portion 51 and the second portion 52 of the pull plate 50 from interfering with each other, the first portion 51 and the second portion 52 can be detached in a folded state as shown in FIG.

Preferably, in step (c), one end of the cable 40 may be from the front section of the jib

The front end of the 31 is detached and connected to the front end of the rear section 32 of the jib, thereby applying as much torque as possible to the jib front section 31 or the jib rear section 32 by the cable 40.

In addition, in the step (d), during the winding of the cable 40 by the hoist, the first portion 51 and the second portion 52 of the pull plate 50 are gradually displaced to a linear arrangement (ie, tensioned) and arranged in a straight line. The rear auxiliary cable 40 provides a pulling force to the jib 30.

When the jib 30 of the folding boom structure is unfolded, as shown in FIG. 9, the method further includes: (e) locking the jib front section 31 and the jib rear section 32 to be flushed to be flush Status (ie expanded state). For example, the jib 30 can be locked in the deployed state by the locking device, and then the jib 30 can be used for operation.

Therefore, the operation of unfolding the folding boom structure can be completed simply by winding and releasing the cable 40 by the hoist, which provides convenience and safety without the need for auxiliary equipment and manual operation. According to still another aspect of the present invention, there is provided a folding method of a folding boom structure, the method comprising: (a) releasing the cable 40 by the hoist such that the jib front section 31 is opposite to the The jib rear section 32 pivots and lowers the position; (b) disconnects the first portion 51 and the second portion 52; (c) passes one end of the cable 40 from the jib 30 Disassembled and connected to the upstream of the jib 30 at the original joint; (d) winding the cable 40 by the hoist to fold the jib front section 31 and the first portion 51 and The second part 52 is close to each other.

Among them, it can be understood that "upstream" refers to the direction from the jib front section 31 to the jib rear section 32. In other words, the jib front section 31 is located upstream of the jib rear section 32.

Also preferably, in step (c), one end of the cable 40 may be detached from the front end of the jib rear section 32 and connected to the front end of the jib front section 31, thereby passing the pair of cables 40 The arm front section 31 or the jib rear section 32 applies as much torque as possible.

Further, when folded in place, as shown in Fig. 5, the first portion 51 and the second portion 52 can be separated to avoid mutual interference of the first portion 51 and the second portion 52.

Similarly, in the folding operation, it is only necessary to wind or unwind the cable 40 through the hoist, which provides convenience and safety.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments, and various simple modifications of the technical solutions of the present invention may be made within the scope of the technical idea of the present invention. These simple variations are within the scope of the invention.

It should be further noted that the specific technical features described in the above specific embodiments may be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not be further described in various possible combinations.

In addition, any combination of various embodiments of the invention may be made, as long as it does not deviate from the idea of the invention, and should also be regarded as the disclosure of the invention.

Claims

Rights request

A folding boom structure comprising a main arm (10), a support rod mechanism (20) and a jib (30) mounted on the main arm (10), a hoist and a hoist a cable (40) wound and supported by the support bar mechanism (20), the jib (30) including a jib front section (31) and a jib rear section (32) pivotally coupled to each other, Characterized in that one end of the cable (40) is detachably coupled to the jib (30), the folding jib structure further includes a pull plate (50), the pull plate (50) including at least detachable a first portion (51) and a second portion (52) pivotally connected, the first portion (51) and the second portion (52) respectively associated with the jib front section (31) and the support rod mechanism (20) Connection.

The folding boom structure according to claim 1, wherein one end of the cable (40) is selectively coupled to the jib front section (31) and the jib rear section (32).

3. The folding boom structure according to claim 2, wherein one end of the cable (40) is selectively coupled to a front end of the front arm section (31) and a rear side of the sub-arm (32) Before

4. The folding boom structure according to claim 1, wherein the pull plate (50) comprises a plurality of pull plate units (53) that are pivotally and detachably connected to each other.

5. The folding boom structure according to claim 4, wherein the pull plate (50) comprises a wire rope connecting at least two adjacent ones of the pull plate units (53).

The folding boom structure according to any one of claims 1 to 5, wherein the folding boom structure includes a front section (31) for locking the jib and a rear section of the jib (32) Can A pivotally connected locking device.

7. The folding boom structure according to claim 6, wherein the jib front section (31) and the jib rear section (32) are each provided with a pin hole, and the locking device includes a a pin of the pin hole and a driving device for driving the pin.

The folding boom structure according to any one of claims 1 to 5, wherein the support rod mechanism (20) comprises a fixed support rod (21) and a pitch support rod (22), the fixed support rod (21) fixed to the main arm (10), the pitch support rod (22) is pivotally coupled to the fixed support rod (21), and the second portion (52) is coupled to the pitch Support rod (22).

9. A method of unfolding a folding boom structure according to any of claims 1-8, the method comprising:

(a) releasing the cable (40) by the hoist such that the jib front section (31) pivots relative to the jib rear section (32) and lowers the position;

(b) connecting the first portion (51) and the second portion (52);

(c) detaching one end of the cable (40) from the jib (30) and connecting to the downstream of the jib (30) at the original joint;

(d) winding the wire (40) by the hoist to tension the pull plate (50) and extending the jib front section (31) to the rear side of the jib (32) Flush.

10. The unfolding method according to claim 9, wherein in step (c), one end of the cable (40) is detached from the front end of the jib front section (31) and connected to the jib The front end of the rear section (32).

The expansion method according to claim 9 or 10, wherein the method further comprises: (e) locking the jib front section (31) and the jib rear section (32) in a state of being stretched to be flush.

12. A method of folding a folding boom structure according to any of claims 1-8, the method comprising:

(b) disconnecting the first portion (51) from the second portion (52);

(c) detaching one end of the cable (40) from the jib (30) and connecting to the upstream of the jib (30) at the original joint;

(d) winding the wire (40) by the hoist to fold the jib front section (31) and bringing the first portion (51) and the second portion (52) closer to each other.

13. The unfolding method according to claim 12, wherein in step (c), one end of the cable (40) is detached from the front end of the jib rear section (32) and connected to the pair The front end of the front section of the arm (31).