A tower crane bidirectional multi-purpose counterweight box

Abstract

A tower crane bidirectional multi-purpose counterweight box belongs to the technical field of construction machinery. The counterweight box comprises a front counterweight positioning stop, a rear counterweight positioning stop, counterweight blocks, a counterweight support shaft and a double-inclined-surface counterweight support plate. The counterweight blocks are multiple and are arranged in the counterweight box. The double-inclined-surface counterweight support plate is symmetrically and parallelly arranged on both sides of the counterweight blocks in the counterweight box. The double-inclined surface is located on the upper surface. The front counterweight positioning stop and the rear counterweight positioning stop are respectively arranged at both ends of the counterweight box. Each counterweight block is supported on one inclined surface of the double-inclined-surface counterweight support plate on both sides through the counterweight support shaft and is sequentially pressed to press the end counterweight block to the rear counterweight positioning stop or the front counterweight positioning stop corresponding to the inclined surface. The counterweight blocks can be all pressed to the front end and the rear end of the counterweight box or part of the counterweight blocks are pressed to the front end and the other part of the counterweight blocks are pressed to the rear end. The center of the selected counterweight block group has more positioning modes in the counterweight box, and the bending moment effect of the top of the tower body is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of construction machinery, and particularly relates to a bidirectional multi-application counterweight box of a tower crane. BACKGROUND

[0002] The counterweight supporting plate on the counterweight box of the current balance arm of a tower crane is single-beveled, so that the counterweight can only be pressed in one direction of the counterweight box, resulting in poor adjustability of the counterweight. The tower crane with variable arm length cannot well play the multi-adaptability balancing role of the counterweight on the tower crane, and the end bending moment of the tower body is increased, which is very unfavorable to the stress state of the tower crane. SUMMARY

[0003] In view of the above technical problems, the present application provides a bidirectional multi-application counterweight box of a tower crane. The counterweight supporting plate on the counterweight box is double-beveled, so that the counterweight block can be supported on any one of the two bevels in the counterweight box, so that the counterweight block can be pressed to the front end or the rear end of the counterweight box, or part of the counterweight block is pressed to the front end and the other part is pressed to the rear end. The center of the selected counterweight block group has more positioning modes in the counterweight box, forming more values of the center of rotation moment, so as to balance the various front inclination moments formed by different arm lengths and different lifting characteristics, and reduce the bending moment effect of the top of the tower body.

[0004] The purpose of the present application is achieved by the following technical scheme:

[0005] The bidirectional multi-application counterweight box of the tower crane comprises a front counterweight positioning stop, a rear counterweight positioning stop, counterweight blocks, counterweight supporting shafts and double-beveled counterweight supporting plates. The counterweight blocks are multiple and arranged in the counterweight box. The double-beveled counterweight supporting plates are symmetrically and parallelly arranged on both sides of the counterweight blocks in the counterweight box. The double-beveled counterweight supporting plates are located on the upper surface. The front counterweight positioning stop and the rear counterweight positioning stop are respectively arranged at the two ends of the counterweight box. Each counterweight block is supported on one side of the double-beveled counterweight supporting plate on the two sides through the counterweight supporting shaft, and the end counterweight block is pressed to the corresponding rear counterweight positioning stop or front counterweight positioning stop through the bevels.

[0006] Further, the two counterweight supporting bevels on the double-beveled counterweight supporting plate correspond to the front counterweight positioning stop and the rear counterweight positioning stop of the counterweight box, so that the counterweight block pressed on the counterweight supporting plate through the supporting shaft has the tendency to slide to the front counterweight positioning stop or the rear counterweight positioning stop in this direction, so as to keep the counterweight blocks in the counterweight box pressed against each other.

[0007] Further, the angle between the bevel of the double-beveled counterweight supporting plate facing the front counterweight positioning stop of the counterweight box and the horizontal line is 45°. Satisfies:

[0008] ,

[0009] Wherein: is the friction coefficient between the counterweight supporting shaft and the counterweight supporting plate, is the acceleration of gravity, is the rotating speed of the tower crane, is the first is the distance from the gravity center of the counterweight block to the rotating center.

[0010] Further, the angle between the inclined surface of the double-inclined-surface counterweight supporting plate facing the positioning stop of the counterweight in the counterweight box and the horizontal line is Satisfies: .

[0011] Further, the angle between the double-inclined surface of the double-inclined-surface counterweight supporting plate and the horizontal line is equal, that is .

[0012] Further, the length of the double-inclined-surface counterweight supporting plate Satisfies:

[0013] ,

[0014] Wherein: is the minimum gap left at one end or in the middle of the counterweight box under the full loading state of the counterweight in the counterweight box, is the number of counterweight blocks in the counterweight box under the full loading state, is the positive tolerance of the thickness of the counterweight block, is the thickness of the counterweight block, is the diameter of the counterweight supporting shaft.

[0015] Further, the distance between adjacent double-inclined-surface counterweight supporting plates Satisfies:

[0016] ,

[0017] Further, the double-inclined-surface counterweight supporting plate is further provided with a counterweight supporting shaft baffle on both outer sides in the counterweight box, and the height H of the counterweight supporting shaft baffle satisfies:

[0018] ,

[0019] Wherein: h is the height of the double-inclined-surface counterweight supporting plate.

[0020] The beneficial effects of the present application are:

[0021] 1. The invention is characterized in that a plurality of counterweight blocks are arranged in the counterweight box, double-inclined counterweight support plates are symmetrically arranged on both sides of the counterweight blocks in the counterweight box, a front counterweight positioning stopper and a rear counterweight positioning stopper are arranged at both ends of the counterweight box respectively, each counterweight block is supported on one side of the double-inclined counterweight support plate on both sides through a counterweight support shaft, and the end counterweight block is positioned on the corresponding rear counterweight positioning stopper or front positioning stopper through the inclined surface in sequence. The double-inclined counterweight support plate makes the counterweight block supported on any one of the two inclined surfaces in the counterweight box, so that the counterweight block can be pressed to the front end and the rear end of the counterweight box, or a part of the counterweight block is pressed to the front end and the other part is pressed to the rear end. The center of gravity of the selected counterweight block group has more positioning modes in the counterweight box, more center of rotation torque values are formed, various forward inclination torques formed by different arm lengths and different lifting characteristics are balanced, and the bending moment effect of the top of the tower body is reduced.

[0022] 2. The inclination angle of the double-inclined counterweight support plate is limited, so that the counterweight block pressed on the counterweight support plate through the counterweight support shaft has the tendency to slide to the corresponding front positioning stopper or rear positioning stopper, so that the counterweight blocks in the counterweight box are kept pressed against each other. The length of the double-inclined counterweight support plate provides a basis for the selection of the geometric parameters of the double-inclined counterweight support plate.

[0023] 3. The counterweight block is fully utilized, and each tower crane only needs to be configured with the number of counterweight blocks that meet the maximum forward inclination torque to meet the counterweight requirements of all arm lengths, which is beneficial to reduce the one-time purchase cost and daily management cost.

[0024] 4. The invention can meet the requirements of different arm lengths corresponding to the lifting characteristics with a small unbalanced torque difference through different combinations and configurations of counterweight blocks, which is beneficial to reduce the unbalanced torque of the top of the tower crane tower.

[0025] 5. The invention is beneficial to the generalization of counterweights of similar models of tower cranes, reduces the number of models, and can reduce the production and use management cost. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a schematic diagram of the balance arm and counterweight installation of the tower crane of the invention.

[0027] Figure 2 It is a front view of Figure 1

[0028] Figure 3 It is a schematic diagram of the counterweight box part structure of the balance arm of the invention.

[0029] Figure 4 It is a front view of Figure 3

[0030] Figure 5 It is a front view of​​Figure 3 Sectional view of section AA.

[0031] Figure 6 This is a schematic diagram of the longitudinal section of the counterweight box of the balance arm in this invention.

[0032] Figure 7 This is a schematic diagram of the counterweight block pressing against the front positioning stop inside the counterweight box according to the present invention.

[0033] Figure 8 for Figure 7 Top view.

[0034] Figure 9 This is a schematic diagram of the positioning stop after the counterweight block is pressed into the counterweight box according to the present invention.

[0035] Figure 10 for Figure 9 Top view.

[0036] Figure 11 This is a schematic diagram showing that, in the counterweight box of the present invention, part of the counterweight block is pressed against the front positioning stop and the other part is pressed against the rear positioning stop.

[0037] Figure 12 for Figure 11 Top view.

[0038] In the diagram: 1. counterweight arm, 2. counterweight arm cable, 3. counterweight block, 4. counterweight support shaft, 5. counterweight rear positioning stop, 6. counterweight support shaft baffle, 7. double-inclined counterweight support plate, 8. counterweight front positioning stop, A, B, and C are counterweight blocks of different masses. Detailed Implementation

[0039] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0040] Example: Figures 1-5 As shown, the present invention discloses a dual-action, multi-purpose counterweight box for tower cranes, comprising a counterweight front positioning stop 8, a counterweight rear positioning stop 5, counterweight blocks 3, a counterweight support shaft 4, and a double-inclined counterweight support plate 7. Multiple counterweight blocks 3 are placed inside the counterweight box. The double-inclined counterweight support plates 7 are symmetrically arranged on both sides of the counterweight blocks 3 within the counterweight box, with the double-inclined counterweight support plates 7 located on the upper surface. A counterweight front positioning stop 8 and a counterweight rear positioning stop 5 are respectively provided at both ends inside the counterweight box. Each counterweight block 3 is supported by the counterweight support shaft 4 on one side of the double-inclined counterweight support plate 7 via the counterweight support shaft 4. The end counterweight blocks 3 are pressed against the corresponding counterweight rear positioning stop 5 or the front positioning stop 8 by the sequential pressing of the inclined surfaces.

[0041] The counterweight 3 is a combination of various counterweights of different weights required for a tower crane. The counterweights can be assembled into the counterweight box or partially installed into the counterweight box as needed.

[0042] The counterweight 3 is supported on one of the inclined surfaces of the double-inclined counterweight support plate 7 by the counterweight support shaft 4, and then pressed onto the positioning stop in sequence. According to the different boom lengths and corresponding lifting characteristics of the upper part of the tower crane, the required counterweight and the position of the counterweight are selected in the counterweight group to minimize the maximum overturning moment formed by the upper structure.

[0043] Furthermore, such as Figure 6 As shown, the double-sloped counterweight support plate 7 has two counterweight support slopes, which correspond to the counterweight front positioning stop 8 and the counterweight rear positioning stop 5 of the counterweight box, respectively. This causes the counterweight block 3, which is pressed onto the counterweight support plate 7 by the counterweight support shaft 4, to have a tendency to slide towards the counterweight front positioning stop 8 or the counterweight rear positioning stop 5 in that direction, so that the counterweight blocks 3 in the counterweight box are kept pressed against each other.

[0044] Furthermore, such as Figure 6 As shown, the angle between the inclined surface of the double-sloped counterweight support plate 7 facing the counterweight front positioning stop 8 in the counterweight box and the horizontal line is... satisfy:

[0045] ,

[0046] in: The coefficient of friction between the counterweight support shaft 4 and the counterweight support plate 7. It is the acceleration due to gravity. This refers to the slewing speed of the tower crane. For the first The distance from the center of gravity of the counterweight to the center of rotation, where Take the maximum value hour, maximum.

[0047] Furthermore, the angle between the inclined surface of the double-sloped counterweight support plate 7 facing the counterweight positioning stop 5 in the counterweight box and the horizontal line is... satisfy: .

[0048] Furthermore, the angles between the double inclined planes of the double-inclined counterweight support plate 7 and the horizontal line are equal, that is... .

[0049] Furthermore, the length of the double-sloping counterweight support plate 7 satisfy:

[0050] ,

[0051] in: The minimum gap left in one end or middle of the counterweight box when the counterweight box is full of counterweights, The number of counterweights 3 in the counterweight box when it is full, The positive tolerance of the thickness of the counterweight 3, which is generally positive, The thickness of the counterweight, The diameter of the counterweight support shaft 4.

[0052] The distance between the two adjacent double-inclined counterweight support plates Satisfies:

[0053] ,

[0054] Further, the counterweight support shaft stop plate 6 is arranged outside the two double-inclined counterweight support plates in the counterweight box, which ensures that the counterweight support shaft 4 cannot come out of the counterweight 3. The height H of the counterweight support shaft stop plate satisfies:

[0055] ,

[0056] Wherein h is the height of the double-inclined counterweight support plate 7.

[0057] As shown in FIG. 1, the counterweight 3 is positioned on the rear counterweight front positioning stop 8 in the counterweight box through the counterweight support shaft 4 and the slope of the double-inclined counterweight support plate 7. Figures 7-8 As shown in FIG. 2, the counterweight 3 is positioned on the rear counterweight positioning stop 5 in the counterweight box through the counterweight support shaft 4 and the slope of the double-inclined counterweight support plate 7.

[0058] As shown in FIG. 3, a part of the counterweight 3 is positioned on the rear counterweight positioning stop 5 in the counterweight box through the counterweight support shaft 4 and the slope of the double-inclined counterweight support plate 7, and the other part is positioned on the rear counterweight front positioning stop 8 in the counterweight box through the counterweight support shaft 4 and the slope of the double-inclined counterweight support plate 7. Figures 9-10 As shown in FIG. 4, a part of the counterweight 3 is positioned on the rear counterweight positioning stop 5 in the counterweight box through the counterweight support shaft 4 and the slope of the double-inclined counterweight support plate 7, and the other part is positioned on the rear counterweight front positioning stop 8 in the counterweight box through the counterweight support shaft 4 and the slope of the double-inclined counterweight support plate 7.

[0059] Figures 11-12 As shown in FIG. 5, a part of the counterweight 3 is positioned on the rear counterweight positioning stop 5 in the counterweight box through the counterweight support shaft 4 and the slope of the double-inclined counterweight support plate 7, and the other part is positioned on the rear counterweight front positioning stop 8 in the counterweight box through the counterweight support shaft 4 and the slope of the double-inclined counterweight support plate 7.

[0060] The present application has multiple combinations of counterweights 3, and the two slopes of the double-inclined counterweight support plate 7 can ensure that the counterweight 3 is positioned in front or behind, and the generated balance moment can more accurately balance the front unbalance moment, thereby reducing the maximum unbalance moment at the top of the tower.

[0061] The present application can make the center of the selected counterweight group have more positioning modes in the counterweight box, form more counterweight moments, balance various forward moments formed by different arm lengths and different lifting characteristics, and reduce the bending moment effect at the top of the tower

[0062] ​It can be understood that the above specific description of the present application is only for illustrating the present application and is not limited to the technical solutions described in the embodiments of the present application. Those skilled in the art should understand that the present application can still be modified or replaced equivalently to achieve the same technical effects. As long as the use needs are met, it is within the protection scope of the present application.

Claims

1. A counterweight box for a tower crane with bidirectional action and multiple applications, characterized in that: The system includes a front counterweight positioning stop, a rear counterweight positioning stop, a counterweight block, a counterweight support shaft, and a double-sloped counterweight support plate. Multiple counterweight blocks are placed inside a counterweight box. The double-sloped counterweight support plates are symmetrically arranged on both sides of the counterweight blocks within the counterweight box, with the double-sloped counterweight support plates located on the upper surface. A front counterweight positioning stop and a rear counterweight positioning stop are respectively installed at both ends of the counterweight box. Each counterweight block is supported by a counterweight support shaft on one side of the double-sloped counterweight support plate, and the end counterweight blocks are pressed against the corresponding rear or front counterweight positioning stop by the sloped surface. The angle between the inclined surface of the double-sloped counterweight support plate facing the front positioning stop of the counterweight in the counterweight box and the horizontal line is... satisfy: ， in: The coefficient of friction between the counterweight support shaft and the counterweight support plate. It is the acceleration due to gravity. This refers to the slewing speed of the tower crane. For the first The distance from the center of gravity of the counterweight to the center of rotation; The angle between the inclined surface of the double-sloped counterweight support plate facing the counterweight positioning stop in the counterweight box and the horizontal line is... satisfy: .

2. The tower crane bidirectional multi-purpose counterweight box according to claim 1, characterized in that: The double-sloping counterweight support plate has two counterweight support slopes, which correspond to the counterweight front positioning stop and the counterweight rear positioning stop of the counterweight box, respectively. This causes the counterweight blocks pressed against the counterweight support plate by the support shaft to have a tendency to slide towards the counterweight front positioning stop or the counterweight rear positioning stop in that direction, so as to keep the counterweight blocks in the counterweight box pressed against each other.

3. The tower crane bidirectional multi-purpose counterweight box according to claim 1, characterized in that: The angles between the two inclined planes of the double-inclined counterweight support plate and the horizontal line are equal, that is... .

4. The tower crane bidirectional multi-purpose counterweight box according to claim 1, characterized in that: The length of the double-sloping counterweight support plate satisfy: ， in: This refers to the minimum clearance left at one end or in the middle of the counterweight box when it is fully loaded with counterweights. This represents the number of counterweights in the counterweight box when fully loaded. For the positive tolerance of the counterweight thickness, For the thickness of the counterweight, This is the diameter of the counterweight support shaft.

5. The tower crane bidirectional multi-purpose counterweight box according to claim 4, characterized in that: The distance between adjacent double-sloping counterweight support plates satisfy: .

6. The tower crane bidirectional multi-purpose counterweight box according to claim 4, characterized in that: Counterweight support shaft baffles are also provided on both outer sides of the double-sloped counterweight support plate inside the counterweight box, and the height H of the counterweight support shaft baffles satisfies: , Where: h is the height of the double-sloping counterweight support plate.

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