WO2011120376A1

WO2011120376A1 - Balancing beam assembly, combined hoist mechanism and crane

Info

Publication number: WO2011120376A1
Application number: PCT/CN2011/071768
Authority: WO
Inventors: 詹纯新; 刘权; 高一平; 周红; 黎伟福
Original assignee: 长沙中联重工科技发展股份有限公司
Priority date: 2010-04-01
Filing date: 2011-03-14
Publication date: 2011-10-06
Also published as: CN102040156A; CN102040156B

Abstract

A balancing beam assembly, a combined hoisting mechanism and a crane are disclosed. The combined hoisting mechanism includes several hoisting mechanisms and one balancing beam assembly. Each hoisting mechanism includes a winding device (1), a wire rope (2) and a pulley block. Each pulley block includes a crown block portion and a movable block portion. The movable block portion comprises a pulley yoke (3) and a movable pulley (4) mounted on the pulley yoke (3). The balancing beam assembly includes a first grade balancing beam (10) and a second grade balancing beam (20). Pulley yokes (3) of the movable block portions of two hoisting mechanisms are symmetrically hinged at both ends of the first grade balancing beam (10). The first grade balancing beam (10) is hinged at the left end of the second grade balancing beam (20) to form a first joint (11). The pulley yoke (3) of the movable block portion of one hoisting mechanism is hinged at the right end of the second grade balancing beam (20) to form a second joint (12). There is a third joint (13) at the lower end of the second grade balancing beam (20) for hinging a hoisting mean (7). The load arm between the first joint (11) and the third joint (13) equals half the load arm between the second joint (12) and the third joint (13), so that the load of the first joint (11) is twice as much as the load of the second joint (12), and the load equality of every hoisting mechanism is achieved.

Description

Balance beam assembly, combined hoisting mechanism and crane

Technical field

The present invention relates to a hoisting mechanism in a hoisting machine, and more particularly to a balance beam assembly, a combined hoisting mechanism having the balance beam assembly, and a crane. Background technique

Usually, in a hoisting machine such as a crane, a tool such as a hook is lifted and lowered by a hoisting mechanism. The hoisting mechanism typically includes a hoisting device, a wire rope, and a pulley block. The hoisting device generally includes a reel and a driving device (such as a motor;), and the driving device is used to drive the reel to rotate to retract the wire rope. The pulley block generally includes a fixed pulley portion and a movable pulley portion, the movable pulley portion including a pulley frame and one or a set of movable pulleys mounted on the pulley frame. One end of the wire rope is wound around the reel, and the other end is wound around the pulley block, and is retracted by the rotation of the reel to drive the moving sheave portion up and down. The hook can be hinged on the pulley frame of the moving pulley portion, and the follower pulley portion is lifted and lowered to lift the weight.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an example of a prior art hoisting mechanism for lifting a hook. As shown in Fig. 1, the hoisting mechanism includes a hoisting device 1, a wire rope 2, and a pulley block. The pulley block includes a fixed pulley portion and a movable pulley portion, the movable pulley portion including a pulley frame 3 and a set of (6) movable pulleys 4 mounted on the pulley frame 3, the fixed pulley portion 8 also generally including a pulley frame 5 and mounting The number of fixed pulleys 6, the movable pulley 4 and the fixed pulley 6 on the pulley frame 5 are generally equal. The fixed pulley portion is usually fixed by its pulley frame, for example, it can be mounted on the head of the crane boom. The hook 7 is hinged to the pulley frame 3 of the movable pulley portion, one end of which is wound around the reel in the hoisting device 1, and the other end is bypassed by the pulley block. By hoisting the wire rope by the hoisting device 1, the moving pulley portion and the hook 7 can be lifted and lowered.

Since a set of (six) movable pulleys 4 is used, the load on the hoisting device 1 and the wire rope 2 will be approximately equal to 1/6 of the load that the hook 7 is subjected to. Therefore, by using a plurality of movable pulleys 4, the lifting weight of the hoisting device 1 and the wire rope 2 can be increased.

In some large or very large hoisting machines, the use of multiple moving pulleys to increase the lifting capacity of the hoisting device and the wire rope is not sufficient. Therefore, a plurality of hoisting mechanisms can be used to lift a hook, that is, a combined hoisting mechanism.

Fig. 2 is a combined hoisting mechanism of the prior art which uses two hoisting mechanisms to lift a hook. As shown in Fig. 1, the combined hoisting mechanism comprises two hoisting mechanisms, each hoisting mechanism comprising a hoisting device 1, a wire rope 2 and a pulley block, each pulley block comprising a fixed pulley portion and a moving pulley portion. The fixed pulley portion includes a pulley frame 5 and a set of fixed pulleys 6 mounted on the pulley frame 5. The moving pulley part includes a slip The wheel carrier 3 and a set of movable pulleys 4 mounted on the pulley frame 3 (6 fixed pulleys and 6 movable pulleys are shown in Fig. 2). In addition, the combined hoisting mechanism also includes a balance beam 10. The hook 7 is hinged to the lower end of the balance beam 10, and the pulley frames 3 of the two movable pulley portions are respectively symmetrically hinged to the left and right ends of the balance beam 10. Therefore, each hoisting mechanism will be subjected to a load equal to half the load that the hook is subjected to, thereby increasing the overall lifting capacity of the combined hoisting mechanism.

Figure 3 is another illustration of the use of the combined hoisting mechanism of Figure 2. As shown in Fig. 3, during use, if the weight of the weight is relatively small, only one lifting mechanism is required to work, the hinge between the pulley frame and the balance beam of one moving pulley portion can be removed, that is, only one is used. Lift the mechanism to lift the hook. Therefore, the combined hoisting mechanism has wide applicability and is convenient to use.

Figure 4 is another combined hoisting mechanism of the prior art which uses four hoisting mechanisms to lift a hook. As shown in Figure 4 (the hoisting device, the wire rope and the fixed pulley portion are omitted), the combined hoisting mechanism comprises a hook and four hoisting mechanisms, each hoisting mechanism comprising a hoisting device and a wire rope And a pulley block, each pulley block including a fixed pulley portion and a movable pulley portion. The movable sheave portion includes a sheave frame 3 and a set of (6) movable sheaves 4 mounted on the sheave frame 3. In addition, the combined hoisting mechanism also includes a balance beam assembly including two first stage balance beams 10 and a second stage balance beam 20. The hook 7 is hinged to the lower end of the second-stage balance beam 20, and the two first-stage balance beams 10 are respectively symmetrically hinged to the left and right ends of the second-stage balance beam 20, and the pulley frames 3 of the two movable pulley portions are respectively symmetrically It is hinged to the left and right ends of each of the first stage balance beams 10. That is, in the order from top to bottom, the combined hoisting mechanism includes four hoisting mechanisms, two first-stage balance beams 10, and a second-stage balance beam 20, and the hooks 7 are hinged to the second stage. The lower end of the balance beam 20. Therefore, each hoisting mechanism will be subjected to a load equal to 1/4 of the load that the hook is subjected to, thereby further increasing the overall lifting capacity of the combined hoisting mechanism.

Figure 5 is a second mode of use of the combined hoist mechanism of Figure 4. As shown in Fig. 5, during use, the hinge between the second-stage balance beam and a first-stage balance beam can be removed, that is, only two lifting mechanisms are used to lift the hook, and the two can be guaranteed. The lifting mechanism is subjected to the same load. Therefore, the combined hoisting mechanism has wide applicability and is convenient to use.

Figure 6 is a third mode of use of the combined hoisting mechanism of Figure 4. As shown in FIG. 6, during use, it is also possible to simultaneously remove the hinge between each of the first-stage balance beam 10 and the pulley frame 3 of one of the movable pulley portions, that is, use two lifting mechanisms to lift the hook Ί, and It is also possible to ensure that the loads of the two hoisting mechanisms are equal.

According to the above principle, the combined hoisting mechanism can also use eight, sixteen or more hoisting mechanisms to lift one hook, and can remove half of the hoisting mechanism of the combined hoisting mechanism as needed. Lift The hook is raised, and by making the remaining hoisting mechanism symmetrical with respect to the hook, it is possible to ensure that the loads of the remaining hoisting mechanisms coincide with each other.

That is to say, in the above-mentioned combined hoisting mechanism, half of the hoisting mechanism can be removed, and at the same time, the remaining half of the hoisting mechanisms (for example, 1, 2, 4, etc.) can be equally loaded. . However, in the existing combined hoisting mechanism, it is impossible to use three hoisting mechanisms to lift one hook and ensure that each hoisting mechanism is subjected to the same load, and by removing one hoisting mechanism, the remaining two can be secured. The loads carried by the hoisting mechanisms are still equal to each other. Summary of the invention

It is an object of the present invention to provide a balance beam assembly that can use a plurality of hoisting mechanisms to lift a hook and ensure that each hoisting mechanism is subjected to equal loads and that by removing one or more hoisting mechanisms, It is possible to ensure that the loads of the remaining hoisting mechanisms are still equal to each other.

It is an object of the present invention to provide a combined hoist mechanism that includes the balance beam assembly described above.

Another object of the present invention is to provide a crane including the above-described balance beam assembly or combined hoist mechanism.

According to an aspect of the present invention, a balance beam assembly is provided, the balance beam assembly including a first stage balance beam and a second stage balance beam, the first stage balance beam being hinged at one end of the second stage balance beam Forming a first hinge point, the other end of the second stage balance beam is provided with a second hinge point, and the second stage balance beam further has a third hinge point, between the first hinge point and the third hinge point The force arm is equal to the force arm between the second hinge point and the third hinge point.

According to another aspect of the present invention, a balance beam assembly is provided, the balance beam assembly including a first stage balance beam and a second stage balance beam, the first stage balance beam being hinged at one end of the second stage balance beam To form a first hinge point, the other end of the second stage balance beam is provided with a second hinge point, the second stage balance beam has a plurality of third hinge points symmetrically disposed, the first hinge point and the The force arm between the symmetrical centerlines of the third hinge point is equal to 1 /2 of the force arm between the second hinge point and the symmetrical centerline of the plurality of third hinge points.

According to another aspect of the present invention, a combined hoisting mechanism is provided, the combined hoisting mechanism comprising a plurality of hoisting mechanisms and a balance beam assembly, each hoisting mechanism comprising a hoisting device, a wire rope and a pulley block, each The pulley block includes a fixed pulley portion and a movable pulley portion, the movable pulley portion includes a pulley frame and a movable pulley mounted on the pulley frame, wherein the balance beam assembly includes a first-stage balance beam and a second-stage balance beam, and the pulleys of the two movable pulley portions The frame is symmetrically hinged at the left and right ends of the first stage balance beam, and the first stage balance beam is hinged at the second stage balance a left end of the beam to form a first hinge point, a pulley frame of a moving pulley portion is hinged at a right end of the second stage balance beam to form a second hinge point, and a lower end of the second stage balance beam has a third hinge point The force arm between the first hinge point and the third hinge point is equal to 1 /2 of the force arm between the second hinge point and the third hinge point.

According to another aspect of the present invention, a combined hoisting mechanism is provided, the combined hoisting mechanism comprising a plurality of hoisting mechanisms and a balance beam assembly, each hoisting mechanism comprising a hoisting device, a wire rope and a pulley block, each The pulley block includes a fixed pulley portion and a movable pulley portion, the movable pulley portion includes a pulley frame and a movable pulley mounted on the pulley frame, wherein the balance beam assembly includes a first-stage balance beam and a second-stage balance beam, and the pulleys of the two movable pulley portions The frame is symmetrically hinged at both ends of the first stage balance beam, the first stage balance beam is hinged at one end of the second stage balance beam to form a first hinge point, and the pulley frame of one moving pulley portion is hinged at the The other end of the second-stage balance beam is formed to form a second hinge point, the second-stage balance beam further has a plurality of third hinge points symmetrically disposed, and the first hinge point is symmetric with the plurality of third hinge points The force arm between the centerlines is equal to 1/2 of the force arm between the second hinge point and the symmetrical centerline of the plurality of third hinge points.

According to another aspect of the present invention, there is provided a crane comprising the balance beam assembly described above or a combined hoisting mechanism.

In the present invention, since the force arm between the first hinge point and the third hinge point is equal to 1 /2 of the force arm between the second hinge point and the third hinge point, the load of the first hinge point is equal to the first 2 times the load of the two hinge points, and because the two lifting mechanisms are symmetrically hinged to the first hinge point through their pulley frame, a lifting mechanism is hinged to the second hinge point through its pulley frame, so multiple lifting The loads that the mechanism is subjected to are equal to each other. When the third hinge point is used to articulate the hook, each hoisting mechanism will withstand 1 / 3 of the hook load.

Further, in the present invention, by removing the connection between a hoisting mechanism and the second hinge point, the remaining two hoisting mechanisms can be used, and the loads received by the two hoisting mechanisms are still equal to each other. In addition, it is also possible to remove only one hoisting mechanism by removing the hinge between the first-stage balance beam and the second-stage balance beam. Therefore, the combined hoisting mechanism of the present invention has wide applicability and is convenient to use.

Further, in the above combined hoisting mechanism, the third hinge point of the second-stage balance beam may be directly hinged with a lifting tool such as a hook to utilize the combined hoisting mechanism to lift the hook; The third hinge point of the beam can also be hinged with another balance beam to be combined as a basic unit into other combined hoisting mechanisms, so that the versatility is strong, the structure is simple, and the use is convenient.

Other embodiments, features, and advantages of the invention will be described in detail in the Detailed Description. DRAWINGS

Figure 1 is an example of a prior art employing a hoisting mechanism to lift a hook.

2 is a combined hoisting mechanism of the prior art that employs two hoisting mechanisms to lift a hook. Figure 3 is another illustration of the use of the combined hoisting mechanism of Figure 2.

Figure 4 is another combined hoisting mechanism of the prior art that employs four hoisting mechanisms to lift a hook.

Figure 5 is a second use of the combined hoisting mechanism of Figure 4, which employs two hoisting mechanisms to lift a hook.

Figure 6 is a third use of the combined hoisting mechanism of Figure 4, which uses two hoisting mechanisms to lift a hook „

7 is a combined hoisting mechanism that uses three hoisting mechanisms to lift a hook in accordance with an embodiment of the present invention.

Figure 8 is a second use of the combined hoisting mechanism of Figure 7, which employs two hoisting mechanisms to lift a hook.

Figure 9 is a third use of the combined hoisting mechanism of Figure 7, which uses a hoisting mechanism to lift a hook.

Figure 10 is a combined hoist mechanism in accordance with another embodiment of the present invention that employs four hoisting mechanisms to lift a hook.

Figure 11 is a simplified representation of the combined hoisting mechanism of Figure 10.

Figure 12 is a combined hoisting mechanism employing five hoisting mechanisms to lift a hook in accordance with another embodiment of the present invention.

Figure 13 shows an alternative use of the combined hoisting mechanism of Figure 12, which uses three hoisting mechanisms to lift a hook.

Figure 14 shows another use of the combined hoisting mechanism in Figure ,, which uses two hoisting mechanisms to lift a hook.

Figure 15 is a simple variant of the combined hoisting mechanism of Figure 12.

Figure 16 is a combined hoisting mechanism employing three hoisting mechanisms to lift two hooks in accordance with another embodiment of the present invention.

Figures 1 6a to 16d respectively show different ways of using the combined hoisting mechanism of Figure 16.

Figures 17a to 17d show an embodiment of several lifting tools for lifting using a combined hoisting mechanism

^ Ϊ page (Article 91) detailed description

Figure 7 shows a typical combined hoisting mechanism with three hoisting mechanisms of the present invention, which can be used directly for lifting tools or as a basic unit in combination with other balance beams to constitute A combined hoisting mechanism for multiple hoisting mechanisms. The lifting tool can be a hook, a lifting eye, a lifting cup, a clamp, a fork, a grab, and the like. In the following detailed description, the hook is mainly explained as an example.

As shown in FIG. 7, the balance beam assembly provided by the present invention includes a first stage balance beam 10 and a second stage balance beam 20, and the first stage balance beam 10 is hinged at one end of the second stage balance beam 20 (for example The left end) is formed with a first hinge point 11 , and the other end of the second stage balance beam 20 (for example, the right end) is provided with a second hinge point 12 , and the second stage balance beam 20 (for example, the lower end) further has a third hinge Point 1 3 , the force arm between the first hinge point 11 and the third hinge point 13 is equal to 1 /2 of the force arm between the second hinge point 12 and the third hinge point 13 .

As also shown in FIG. 7, the combined hoisting mechanism provided by the present invention includes three hoisting mechanisms and a balance beam assembly, each hoisting mechanism may include a hoisting device 1, a wire rope 2, and a pulley block, each of which generally includes a pulley portion and a movable pulley portion, the movable pulley portion including a pulley frame 3 and a movable pulley 4 mounted on the pulley frame 3, the balance beam assembly including a first-stage balance beam 10 and a second-stage balance beam 20, and two movable pulley portions The pulley frame 3 is symmetrically hinged at the left and right ends of the first stage balance beam 10, and the first stage balance beam 10 is hinged at the left end of the second stage balance beam 20 to form a first hinge point 11 and a movable pulley A portion of the pulley frame 3 is hinged at a right end of the second stage balance beam 20 to form a second hinge point 12, and a lower end of the second stage balance beam 20 has a third hinge point 13, the first hinge point 11 The force arm between the third hinge point 13 and the third hinge point 13 is equal to 1 /2 of the force arm between the second hinge point 12 and the third hinge point 13. The third hinge point 12 at the lower end of the second stage balance beam 20 can be hinged directly to the hook 7.

In the combined hoisting mechanism of the present invention, each hoisting mechanism can employ any suitable hoisting mechanism of the prior art, which is not limited in the present invention. Typically, each hoisting mechanism can include a hoisting device 1, a wire rope 2, and a pulley block. The hoisting device 1 generally includes a reel and a driving device for driving the reel, such as a motor, etc., and the present invention will not be described again. Each pulley block can include a fixed pulley portion and a moving pulley portion. The fixed pulley portion may include a pulley frame 5 and one or a set of fixed pulleys 6 mounted on the pulley frame 5. The movable sheave portion may include a pulley frame 4 and one or a set of movable pulleys 4 mounted on the pulley frame 4. In the embodiment shown in Fig. 7, the number of the movable pulley 4 and the fixed pulley 6 is six, so that the load on the wire rope can be reduced to 1 / 6 of the load per pulley frame. The fixed sheave portion is typically secured by a pulley frame 5, such as to the head of a crane boom. The moving pulley part will be lifted and lowered by the wire rope along with the hook.

In the above combined hoisting mechanism, the force arm between the first hinge point 11 and the third hinge point 13 is equal to the second 1 /2 of the force arm between the hinge point 12 and the third hinge point 13, so the first hinge point 11 is subjected to a load equal to 1 times the load of the second hinge point 12, and because the two hoisting mechanisms pass through it The pulley frame 4 is symmetrically hinged to the first hinge point 11, and a hoisting mechanism is hinged by its pulley frame 4 to the second hinge point 12, so that the loads of the three hoisting mechanisms are equal to each other. When the third hinge point 13 is used to articulate the hook 7, each hoisting mechanism will withstand 1 / 3 of the load of the hook 7. When the number of fixed pulleys 6 and moving pulleys 4 in the pulley block are respectively 6, the load on the wire rope in each hoisting mechanism will be equal to 1 / 18 of the weight of the hook. Therefore, the overall lifting weight of the combined hoisting mechanism of the present invention is greatly improved.

Figure 8 shows another use of the combined hoisting mechanism of Figure 7, with the illustration of the hoisting device, the wire rope and the fixed pulley portion omitted. As shown in Fig. 8, the connection at the second hinge point 12 of the second stage balance beam 20 can be removed as needed, that is, the connection between the second stage balance beam 20 and a lifting mechanism at the right end thereof is removed, and only the retention is retained. Two lifting mechanisms at the left end. Therefore, the remaining two hoisting mechanisms will evenly share the load of the hook 7. The hinge between the pulley frame 4 of the movable pulley portion and the first-stage balance beam 10 or the second-stage balance beam 20, and the hinge between the first-stage balance beam 10 and the second-stage balance beam 20 can be used with the pin It is realized by conventional means, which is convenient to disassemble and easy to operate.

Figure 9 shows another use of the combined hoisting mechanism of Figure 7, with the illustration of the hoisting device, the wire rope and the fixed pulley portion omitted. As shown in FIG. 9, the hinge between the first-stage balance beam 10 and the second-stage balance beam 20 can be removed as needed, so that only one hoisting mechanism of the right end of the second-stage balance beam 20 is retained, that is, the hook 7 is only Lifting is performed by the one hoisting mechanism, and the effect is similar to the case where the single hoisting mechanism is used to lift the hook as shown in FIG.

In the above embodiment, the third hinge point 13 at the lower end of the second stage balance beam 20 is directly hinged to the hook 7 to lift the hook. The combined hoisting mechanism can be modified to use only one hoisting mechanism to lift the hook or to use two hoisting mechanisms by removing the hinge at the first hinge point 11 or the second hinge point 12 as needed for different situations. The hook is lifted, so it has wide applicability and is easy to use.

In other embodiments, the combined hoist mechanism shown in Figure 7 can also be used as a base unit in combination with other balance beams to form a structure that includes more hoisting mechanisms for use. Detailed description will be made below through specific embodiments.

Figure 10 is a combined hoist mechanism in accordance with another embodiment of the present invention, which employs four hoisting mechanisms to lift a hook.

As can be seen from Fig. 10, the combined hoisting mechanism includes the combined hoisting mechanism as a basic unit shown in Fig. 7. In addition, the combined hoisting mechanism further includes a third-stage balance beam 30, and is hinged to the third-stage balance beam Another lifting mechanism at the right end of 30.

Specifically, the third hinge point 13 on the second stage balance beam 20 is not used for the hinged hook 7, but is hinged to the left end of the third stage balance beam 30. At the same time, the right end of the third stage balance beam 30 is hinged to the other hoisting mechanism to form a fourth hinge point 14, and the lower end is hinged to the hook 7 to form a fifth hinge point 15. It should be noted that the fifth hinge point 15 at the lower end of the third-stage balance beam 30 can be directly hinged to the hook 7 to form the structure shown in FIG. 10, but as an option, it can be further combined with other The balance beam is hinged to form a more complex combined balance beam, which will be readily apparent to those of ordinary skill in the art and still be part of the present disclosure.

Because there are three lifting mechanisms on the left side of the fifth hinge point 15 of the third-stage balance beam 30, and only one lifting mechanism on the right side, the force arm between the third hinge point 13 and the fifth hinge point 15 It should be equal to 1 / 3 of the arm between the fourth hinge point 14 and the fifth hinge point 15, so that the loads of the four hoisting mechanisms can be guaranteed to be equal.

If necessary, the hoisting mechanism at the fourth hinge point 14 at the right end of the third-stage balance beam 30 can be removed, thereby retaining only the three hoisting mechanisms on the left side thereof, similar to the combined hoisting shown in FIG. The mechanism, that is, the load of the hook is equally shared by the three hoisting mechanisms.

Alternatively, the second stage balance beam 20 at the third hinge point 13 at the left end of the third stage balance beam 30 can be removed to retain only one hoisting mechanism on the right side thereof.

Fig. 11 is a simplified modification of the combined hoisting mechanism of Fig. 10, with the balance beam assembly (including the first stage balance beam 10 and the second stage balance beam 20) shown in Fig. 7 being disposed in a left-right direction as a basic unit.

Figure 12 is a combined hoist mechanism in accordance with another embodiment of the present invention, which employs five hoisting mechanisms to lift a hook.

As can be seen from Fig. 12, the combined hoisting mechanism includes the combined hoisting mechanism as a basic unit shown in Fig. 7. Further, the combined hoisting mechanism further includes a third-stage balance beam 30 and another first-stage balance beam 10, and the other two hoisting mechanisms are symmetrically hinged at the left and right ends of the other first-stage balance beam 10.

Specifically, the third hinge point 13 on the second stage balance beam 20 is not used for the hinged hook 7, but is hinged to the left end of the third stage balance beam 30. At the same time, the right end of the third stage balance beam 30 is hinged to the lower end of the other first stage balance beam 10 to form a fourth hinge point 14, the lower end of which is hinged to the hook 7 to form a fifth hinge point 15. At the same time, the two hoisting mechanisms are symmetrically hinged to the left and right ends of the other first stage balance beam 10 by the pulley frame 4 of the movable pulley portion thereof. It should be noted that the fifth hinge point 15 at the lower end of the third-stage balance beam 30 can be directly hinged to the hook 7 to form the structure shown in FIG. 12, but as an option, it can be further combined with other The balance beam is hinged to form a more complex combined balance beam, which will be readily apparent to those of ordinary skill in the art and still be part of the present disclosure. Because there are three lifting mechanisms on the left side of the fifth hinge point 15 of the third-stage balance beam 30, and two lifting mechanisms on the right side, the force arm between the third hinge point 13 and the fifth hinge point 15 It should be equal to 2 / 3 of the force arm between the fourth hinge point 14 and the fifth hinge point 15, so that the loads of the five hoisting mechanisms can be ensured to be equal to each other.

Fig. 13 shows another use of the combined hoisting mechanism of Fig. 12, in which the illustration of the hoisting device, the wire rope and the fixed pulley portion is omitted. As shown in FIG. 13 , the connection at the fourth hinge point 14 at the right end of the third-stage balance beam 30 can be removed as needed, that is, the connection of the fourth-stage balance beam 40 to the right end thereof is removed, and only the three ends of the left end are retained. Lifting mechanism (ie the basic unit shown in Figure 7). Therefore, the remaining three hoisting mechanisms will evenly share the load of the hook 7.

Fig. 14 shows another use of the combined hoisting mechanism of Fig. 12, in which the illustration of the hoisting device, the wire rope and the fixed pulley portion is omitted. As shown in Fig. 14, the hinge between the third-stage balance beam 30 and the second-stage balance beam 20 can be removed as needed, so that only the two hoisting mechanisms at the right end of the third-stage balance beam 30 are retained. Therefore, the remaining two hoisting mechanisms will evenly share the load of the hook 7.

Fig. 15 is a simplified modification of the combined hoisting mechanism of Fig. 12, with the balance beam assembly (including the first stage balance beam 10 and the second stage balance beam 20) shown in Fig. 7 being disposed as a base unit in the left and right directions. Figure 16 is a combined hoisting mechanism for lifting two hooks with three hoisting mechanisms in accordance with another embodiment of the present invention.

The difference from the combined hoisting mechanism shown in Fig. 7 is that the combined hoisting mechanism comprises two hooks 7. Specifically, the lower end of the second stage balance beam 20 has two third hinge points 13 and a hook 7 is hinged. The connection relationship between the first hinge point 11 and the second hinge point 12 in the upper portion of the second-stage balance beam 20 is the same as that shown in FIG. 7, that is, the first hinge point 11 is hinged with the first-stage balance beam 10, and the two lifting mechanisms are The pulley frames 3 of the respective movable pulley portions are hinged to the left and right ends of the first stage balance beam 10, and a hoisting mechanism is hinged to the right end of the second stage balance beam 20 via the pulley frame 3 of the movable pulley portion. Since the two hooks 7 are used, the force arm between the first hinge point 11 and the symmetrical center line is equal to the second hinge point 12 and the symmetry based on the symmetrical center line between the two hooks 7. The 1 / 2 of the force arm between the center lines ensures that each hoisting mechanism carries a balance.

In this combined hoisting mechanism, it is also possible to remove a part of the hoisting mechanism as needed. As an example, Figs. 16a to 16d respectively show different states of use of the combined hoisting mechanism of Fig. 16.

As shown in FIG. 16a, the hoisting mechanism at the second hinge point 12 at the right end of the second-stage balance beam 20 can be removed, and the first-stage balance beam 10 and the two hoisting mechanisms above it can be retained, which can ensure the two The lifting mechanism is balanced.

As shown in Fig. 16b, while the hoisting mechanism at the right end of the second-stage balance beam 20 is removed, a hook 7 can be removed, that is, the two hoisting mechanisms balance the load of one hook 7 respectively.

As shown in FIG. 16c, the first-stage balance beam 10 on the left side of the second-stage balance beam 20 and the upper portion thereof can also be removed. Two hoisting mechanisms, at which point one hoisting mechanism bears the load of the two hooks 7.

As shown in Fig. 16d, on the basis of Fig. 14c, it is also possible to simultaneously remove a hook 7 so that one hoisting mechanism bears the load of one hook 7.

In the combined hoisting mechanism shown in FIG. 16, two hooks 7 are symmetrically disposed at the lower end of the second-stage balance beam 20, but the present invention does not limit this, that is, at the lower end of the second-stage balance beam 20 More hooks 7 are arranged symmetrically.

Figures 17a through 17d show an embodiment of several lifting tools that are lifted using a combined hoisting mechanism. Specifically, the lifting tool shown in Fig. 17a is a straight shank hook, the lifting tool shown in Fig. 17b is a straight shank, and the lifting tool shown in Fig. 17c is a tong, the hoisting shown in Fig. 17d. The tool is a grab. As described above, the tool to be used in the present invention is not limited to the above example, and any suitable tool in the prior art can be used, such as a straight shank double hook, an anchor hook, a straight shank hook, a double hook head, a lifting ring, and a lifting tool. Heavy suction cups, clamps, forks, etc.

Further, the present invention relates to a crane using the balance beam assembly or the combined hoisting mechanism of the present invention.

The present invention has been described in detail by the preferred embodiments thereof, but these embodiments are merely illustrative and not restrictive. Various changes or modifications can be made by those skilled in the art within the scope of the invention. For example, the combined hoisting mechanism shown in Figure 16 can lift more symmetrically arranged hooks; the combined hoisting mechanism as a basic unit shown in Figure 7 can be used with other balance beams and hoisting mechanisms. A variety of combinations to form a more complex combined hoisting mechanism. As a simple example, for the combined hoisting mechanism shown in Figure 7, two such combined hoisting mechanisms can be used, and then the two combined hoisting mechanisms are hingedly hinged in a third The left and right ends of the level balance beam, that is, the combined hoisting mechanism as the basic unit shown in FIG. 7 is used instead of each of the separate hoisting mechanisms shown in FIG. 1, so that six hoisting mechanisms can be realized. To lift the hook.

Claims

Claim

A balance beam assembly, characterized in that: the balance beam assembly comprises a first stage balance beam (10) and a second stage balance beam (20), the first stage balance beam (10) being hinged in the One end of the second stage balance beam (20) to form a first hinge point (11), and the other end of the second stage balance beam (20) is provided with a second hinge point (12), the second stage balance beam (20) further includes a third hinge point (13), said first arm between the articulation point (11) and the third hinge point (13) equal to the second articulation point (I ²⁾ and third hinge Point 11 (13) between the force arms.

2. Balance beam assembly according to claim 1, characterized in that the third hinge point (13) is used for the articulated tool (7).

3. The balance beam assembly of claim 1 wherein: said third hinge point (13) is for articulating to one end of a third stage balance beam (30), said third stage balance beam (30) The other end is provided with a fourth hinge point (I ⁴ ), the third stage balance beam (30) further has a fifth hinge point (I ⁵ ), the third hinge point ( 13 ) and the fifth hinge point between the arm (I ⁵⁾ equal to the fourth hinge point (I ⁴⁾ and a fifth arm between the articulation point (I ⁵⁾ 1/3.

4. A balance beam assembly according to claim 3, characterized in that said fifth hinge point (15) is used for the articulated tool (7).

5. The balance beam assembly of claim 1 wherein: said third hinge point (13) is for articulating to one end of a third stage balance beam (30), said third stage balance beam (30) The other end is hinged to another first stage balance beam (10) to form a fourth hinge point (14), the third stage balance beam (30) also having a fifth hinge point

(15), said third hinge point (13) and the fifth arm between the articulation point (I ⁵⁾ equal to the fourth hinge point (I ⁴⁾ of the fifth articulation point (I ⁵⁾ between ^{2/3 of the} arm.

6. Balance beam assembly according to claim 5, characterized in that the fifth hinge point (15) is used for the articulated tool (7).

7. A balance beam assembly according to claim 2, 4 or 6, characterized in that the lifting tool (7) comprises a hook, a lifting eye, a lifting cup, a clamp, a fork or a grab.

8. A balance beam assembly, characterized in that: the balance beam assembly comprises a first stage balance beam (10) and a second stage balance beam ( ²⁰ ), the first stage balance beam (10) being hinged at the one end of said second stage the balance beam ⁽²⁰⁾ to form a first articulation point (11), the other end of the second stage the balance beam (20) provided with a second hinge point (12), the second stage The balance beam ( ²⁰ ) has a plurality of third hinge points (13) symmetrically disposed, and the force arm between the first hinge point (11) and the symmetrical center line of the plurality of third hinge points (13) is equal to arm between the center line of symmetry of said second articulation point (the I ²⁾ with a plurality of the third hinge point (13) ^1/2.

A crane, characterized in that the crane comprises the balance beam assembly of any one of claims 1-8.

10. A combined hoisting mechanism, the combined hoisting mechanism comprising a plurality of hoisting mechanisms and a balance beam assembly, each hoisting mechanism comprising a hoisting device (1;), a wire rope (2) and a pulley block, each The pulley block includes a fixed pulley portion and a movable pulley portion, the movable pulley portion including a pulley frame (3) and a movable pulley (4) mounted on the pulley frame (3), characterized in that:

The balance beam assembly includes a first stage balance beam (10) and a second stage balance beam (20), and the pulley frames (3) of the two movable pulley portions are symmetrically hinged to the two of the first stage balance beams (10) End, the first stage balance beam (10) is hinged at one end of the second stage balance beam (20) to form a first hinge point (11), and a pulley frame (3) of a movable pulley portion is hinged at the first the other end of two balance beams ⁽²⁰⁾ to form a second hinge point (I ^2), the second stage the balance beam (20) further includes a third hinge point (13), the first hinge point (11 ) arm and the third hinge point (13) between the hinge point equal to the second (I ²⁾ and the third hinge point (between the arm 13) \ 11.

11. Combined hoisting mechanism according to claim 10, characterized in that the third hinge point (13) is used for a hinged lifting tool (7).

12. The combined hoisting mechanism according to claim 10, wherein: said third hinge point (13) is for articulating to one end of the third-stage balance beam (30), and a pulley frame of the movable pulley portion ( 3) articulated in the third The other end of the balance beam stage (30) to form a fourth articulation point (14), the third stage of the balance beam (30) further includes a fifth hinge point (I ^5), said third hinge point (13) and The force arm between the fifth hinge point (I ⁵ ) is equal to ^1/3 of the force arm between the fourth hinge point (14) and the fifth hinge point (I ⁵ ).

13. Combined hoisting mechanism according to claim 12, characterized in that the fifth hinge point (15) is used for a hinged lifting tool (7).

14. The combined hoisting mechanism according to claim 10, wherein: said third hinge point (13) is for articulating to one end of a third-stage balance beam (30), said third-stage balance beam (30) and the other end is hinged to the other of the first stage of the balance beam (10) to form a fourth articulation point (I ^4), two portions of the movable pulley sheave frame (3) symmetrically articulated in the other of the first stage At both ends of the balance beam (10), the third stage balance beam (30) further has a fifth hinge point (I ⁵ ), between the third hinge point ( 13 ) and the fifth hinge point ( I ⁵ ) The force arm is equal to 2/3 of the force arm between the fourth hinge point (14) and the fifth hinge point (15).

15. Combined hoisting mechanism according to claim 14, characterized in that said fifth hinge point (15) is used for a hinged lifting tool (7).

16. Combined hoisting mechanism according to claim 11, 13 or 15, characterized in that the loading tool (7) comprises a hook, a lifting eye, a lifting cup, a clamp, a fork or a grab.

17. A combined hoist according to claim 10, wherein: each of the moving sheave portions comprises one or a set of moving sheaves (4) mounted on said sheave frame (3).

18. A combined hoisting mechanism according to claim 17, wherein: each fixed sheave portion comprises a fixed sheave frame (5) and one or a set of fixed sheaves mounted on the sheave frame (5) (6) ), and the moving pulley

(4) The number of fixed pulleys (6) is equal.

19. A combined hoisting mechanism, the combined hoisting mechanism comprising a plurality of hoisting mechanisms and a balance beam assembly, each hoisting mechanism comprising a hoisting device (1), a wire rope (2) and a pulley block, each pulley block Including the fixed pulley part and moving a pulley portion, the movable pulley portion comprising a pulley frame (3) and a movable pulley (4) mounted on the pulley frame (3), characterized in that:

The balance beam assembly includes a first stage balance beam (10) and a second stage balance beam (20), and the pulley frames (3) of the two movable pulley portions are symmetrically hinged to the two of the first stage balance beams (10) End, the first stage balance beam (10) is hinged at one end of the second stage balance beam (20) to form a first hinge point (11), and a pulley frame (3) of a moving pulley portion is hinged at the the other end of two balance beams ⁽²⁰⁾ to form a second hinge point (I ^2), the second stage the balance beam (20) having a plurality of further third articulation points (13) disposed symmetrically, the second A force arm between a hinge point (11) and a symmetrical center line of the plurality of third hinge points (13) is equal to a symmetrical center line of the second hinge point (I ² ) and the plurality of third hinge points ( 13 ) arm between ^1/2.

A crane, characterized in that the crane comprises the combined hoisting mechanism of any one of claims 10-19.