Displacement counterweight mechanism

Abstract

A displacement counterweight mechanism relates to the field of engineering machinery and is characterized in that a primary telescopic mechanism is arranged on the lower portion of a counterweight support, one end of a swing support is connected with the primary telescopic mechanism, the other end of the swing support is connected with a counterweight bracket, and a counterweight block is placed on the counterweight bracket; the first-stage telescopic mechanism moves to drive the swing support to swing, the swing support drives the balance weight bracket to move together, and the balance weight block is placed on the balance weight bracket, so that the rotation radius and the gravity center position of the balance weight are changed; furthermore, a second-stage telescopic device can be additionally arranged between the counterweight bracket and the swinging bracket, and the counterweight bracket is driven to further swing through the movement of the second-stage telescopic device, so that a larger displacement distance is realized; the technical problem that the displacement distance of the balancing weight is limited is solved, and the tipping performance of the crane is further improved; and the problem that the counterweight bracket is time-consuming and labor-consuming to disassemble and assemble in a transition state is solved, the efficiency is improved, and the cost is saved.

Description

Technical Field

[0001] The invention relates to the field of engineering machinery, and in particular to a displacement balancing weight mechanism. Background Art

[0002] Cranes are widely used in hoisting operations in wind farms, large petrochemical projects, large bridges and other projects. At the same time, they are increasingly used in construction in cities and factories. Customers have higher and higher requirements for the performance and spatial adaptability of cranes. In order to improve the lifting performance of cranes, it is necessary to continuously increase the weight of the counterweight to increase the anti-overturning moment of the crane, which has caused various manufacturing and transportation costs to continue to increase. More importantly, it has limited the working conditions of cranes in many narrow working spaces.

[0003] At present, the most widely used variable position counterweight connected to the turntable is mainly a rotating swing counterweight structure, which includes a counterweight bracket, a rotating shaft, a swing cylinder, a rotating frame and a counterweight block. The rotating frames on the left and right sides are connected to the counterweight bracket through a rotating shaft, and the swing cylinders on the left and right sides are connected to the counterweight bracket and the rotating frame. The counterweight blocks on the left and right sides are placed on the rotating frame. Under the drive of the swing cylinder, the counterweight block in this structure can be swung back and forth around the rotating shafts on both sides to achieve the change of the counterweight position. Due to the layout restrictions of the rotating frame and the swing cylinder, the swing distance of the left and right rotating frames is limited, and the displacement distance of the counterweight is limited, which limits the further improvement of the crane's tipping performance. The transition state is limited by the road width, the width of the transport vehicle, etc. The counterweight block and the overall structure of the counterweight bracket connected to the turntable in the above scheme must be removed, which is time-consuming and labor-intensive, and reduces the working efficiency of the crane. Summary of the invention

[0004] In order to solve the existing technical problems of using as little counterweight as possible to maximize the lifting performance and adapt to more narrow working spaces, the present invention designs a counterweight displacement mechanism and method, which can reduce the weight of the counterweight and the turning radius of the crane under the same conditions to adapt to operations in narrow spaces.

[0005] A displacement counterweight mechanism, comprising a counterweight bracket, a primary telescopic mechanism, a swing bracket, a counterweight bracket and a counterweight block; The first-stage telescopic mechanism is arranged at the lower part of the counterweight bracket, one end of the swing bracket is connected to the first-stage telescopic mechanism, and the other end of the swing bracket is connected to the counterweight bracket, and the counterweight block is placed on the counterweight bracket; The counterweight bracket comprises a counterweight bracket body, a slide rail fixing device is fixedly arranged at one end of the bottom surface of the counterweight bracket body, a displacement slide rail is fixedly arranged on the slide rail fixing device, a telescopic device mounting hole is arranged on the slide rail fixing device, the displacement slide rail is nested and connected with a slider in a primary telescopic mechanism; the telescopic device mounting hole is connected with a telescopic device fixed shaft in the primary telescopic mechanism; The first-level telescopic mechanism includes two sliders, a telescopic device, a telescopic device fixed shaft and two swing bracket connecting shafts. The telescopic device fixed shaft is arranged in the middle of the telescopic device, the two swing bracket connecting shafts are arranged at both ends of the telescopic device, and the two sliders are respectively fixed on the sides of the two swing bracket connecting shafts; the telescopic device fixed shaft is connected to the telescopic device mounting hole for fixing the telescopic device; the swing bracket connecting shaft is connected to the swing bracket to transmit the power provided by the telescopic device to the swing bracket; The swing bracket is composed of a first swing bracket body, a second swing bracket body, and a centering connection block. The centering connection block connects the first swing bracket body and the second swing bracket body together. The first swing bracket body and the second swing bracket body are provided with a first connection hole at the same side end, and the first swing bracket body and the second swing bracket body are provided with a second connection hole and a third connection hole at the other side end; the first connection hole is connected to the swing bracket connecting shaft; the second connection hole is connected to the secondary telescopic device; the third connection hole is connected to the counterweight bracket; the centering connection block is connected to the centering slide rail to prevent the mechanism from eccentric movement; The counterweight bracket comprises a counterweight bracket body, a first connecting shaft and a second connecting shaft. The first connecting shaft and the second connecting shaft are arranged on the same side of the counterweight bracket body, and the first connecting shaft is connected to the swing bracket.

[0006] A secondary telescopic device is arranged between the counterweight bracket and the swing bracket, one end of the swing bracket is connected to the primary telescopic mechanism, the other end of the swing bracket is respectively connected to the secondary telescopic device and the counterweight bracket, the other end of the secondary telescopic device is connected to the other end of the counterweight bracket, the counterweight block is placed on the counterweight bracket, and the second connecting shaft is the secondary telescopic device.

[0007] The primary telescopic mechanism and the secondary telescopic device are oil cylinders.

[0008] The first-level telescopic mechanism is a double oil cylinder.

[0009] A centering slide rail is provided in the middle of the bottom surface of the main body of the counterweight support, and the centering slide rail is connected to the swing support to prevent the swing support from eccentric movement; The displacement slide rail is a linear rail or a circular rail.

[0010] The swing bracket is arranged in a left-right manner or in an up-down manner.

[0011] The ends of the first swing bracket body and the second swing bracket body where the second connecting hole and the third connecting hole are opened are single-layer or multi-layer board structures.

[0012] Working process and working principle of the present invention: The present invention drives the swing bracket to swing through the movement of the primary telescopic mechanism, and the swing bracket drives the counterweight bracket to move together, and the counterweight block is placed on the counterweight bracket, thereby changing the counterweight rotation radius and the center of gravity position. Furthermore, a secondary telescopic device can be added between the counterweight bracket and the swing bracket, and the counterweight bracket is driven to swing further through the movement of the secondary telescopic device to achieve a larger displacement distance.

[0013] The movement of the telescopic device in the primary telescopic mechanism drives the slider to slide back and forth on the counterweight bracket, and the sliding of the slider drives the swing bracket to swing. At this time, the secondary telescopic device, the counterweight bracket, the counterweight block and the swing bracket swing together to achieve the swing displacement of the counterweight block. After the swing displacement is completed, the movement of the secondary telescopic device drives the counterweight bracket to swing, achieving further displacement of the counterweight block.

[0014] The method of changing the counterweight in working state is as follows: Before work begins, the counterweight system is in the first position, at which time the primary telescopic mechanism is in a fully extended state and the secondary telescopic device is in an initial state.

[0015] At the beginning of the operation, the primary telescopic mechanism retracts, driving the swing bracket to swing to the rear side of the counterweight bracket. At this time, the secondary telescopic device, the counterweight bracket, the counterweight block and the swing bracket swing together. When the primary telescopic mechanism reaches the fully retracted state, the counterweight system swings to the second position to achieve the swing displacement of the counterweight system. After reaching the second position, the secondary telescopic device begins to extend, pushing the counterweight bracket to continue to swing to the rear side of the counterweight bracket. When the secondary telescopic device reaches the fully extended state, the counterweight system swings to the third position to achieve further displacement of the counterweight system. The counterweight system can be swung from the third position to the first position in the reverse order.

[0016] The method of changing the balance weight in transition state is as follows: Before starting work, remove the counterweight block in the counterweight system. If the counterweight system is in the first position, move the counterweight system to the second position according to the counterweight displacement method in the working state; if it is in the second position / third position, it can be directly shifted to the transition state.

[0017] Beneficial effects of the present invention: 1. The present invention solves the technical problem of limited displacement distance of the counterweight, and the tipping performance of the crane is further improved.

[0018] 2. The present invention solves the problem of time-consuming and labor-intensive disassembly and assembly of the counterweight bracket during transfer, thereby improving efficiency and saving costs.

[0019] Crane: A multi-action machine that lifts heavy objects vertically and moves them horizontally within a certain range.

[0020] Turntable: A structural component on a crane used for the rotation of the upper vehicle. It is the main force-bearing structure when the crane is lifting.

[0021] Counterweight: Installed at the tail of the turntable, it is mainly used to balance the tipping moment generated when the crane is lifting weights to maintain the stability of the entire machine.

[0022] Center of gravity position: The position of the counterweight's center of gravity relative to the center of rotation directly affects the crane's overturning moment.

[0023] Distance of displacement: the distance the center of gravity of the balance weight changes.

[0024] Turning radius: The distance from the farthest point of the counterweight to the turntable's rotation axis. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention.

[0026] Figure 2 Schematic diagram of the structure of a counterweight bracket according to an embodiment of the present invention.

[0027] Figure 3 It is a structural schematic diagram of a primary telescopic mechanism according to an embodiment of the present invention.

[0028] Figure 4 It is a schematic structural diagram of a swing bracket according to an embodiment of the present invention.

[0029] Figure 5 Schematic diagram of the structure of a counterweight bracket according to an embodiment of the present invention.

[0030] Figure 6 It is a structural schematic diagram of a counterweight system in a first position according to an embodiment of the present invention.

[0031] Figure 7 A structural diagram of a counterweight system in a second position according to an embodiment of the present invention Figure 8 A schematic diagram of the structure of the counterweight system of an embodiment of the present invention located at the third position Fig. 9 A structural diagram of a counterweight system in a fourth position according to an embodiment of the present invention DETAILED DESCRIPTION

[0032] See also Figures 1 to 9 Shown is an embodiment of the present invention.

[0033] A displacement counterweight mechanism, comprising a counterweight bracket 1, a primary telescopic mechanism 2, a swing bracket 3, a secondary telescopic device 4, a counterweight bracket 5 and a counterweight block 6; The counterweight bracket 1 is the basic structure for connecting the counterweight system with the turntable. The primary telescopic mechanism 2 is arranged at the lower part of the counterweight bracket 1. One end of the swing bracket 3 is connected to the primary telescopic mechanism 2. The other end of the swing bracket 3 is respectively connected to the secondary telescopic device 4 and the counterweight bracket 5. The other end of the secondary telescopic device 4 is connected to the other end of the counterweight bracket 5. The counterweight block 6 is placed on the counterweight bracket 5. The counterweight support 1 includes a counterweight support body 11, a centering slide rail 12 is arranged in the middle of the bottom surface of the counterweight support body 11, a side plate 13 is fixedly arranged at one end of the bottom surface of the counterweight support body 11, a displacement slide rail 14 is fixedly arranged on the side plate 13, a telescopic device mounting hole 15 is arranged on the side plate 13, the displacement slide rail 14 is nested and connected with a slider 21 in the primary telescopic mechanism 2; the telescopic device mounting hole 15 is connected with the telescopic device fixed shaft 23 in the primary telescopic mechanism 2; the centering slide rail 12 is connected with the swing support 3 to prevent the swing support 3 from eccentric movement; The primary telescopic mechanism 2 includes two sliders 21, a telescopic device 22, a telescopic device fixed shaft 23 and two swing bracket connecting shafts 24. The telescopic device fixed shaft 23 is arranged in the middle of the telescopic device 22, and the two swing bracket connecting shafts 24 are arranged at both ends of the telescopic device 22. The two sliders 21 are respectively fixedly arranged on the sides of the two swing bracket connecting shafts 24; the telescopic device fixed shaft 23 is connected to the telescopic device mounting hole 12 for fixing the telescopic device 22; the swing bracket connecting shaft 24 is connected to the swing bracket 3 to transmit the power provided by the telescopic device 22 to the swing bracket 3; the swing displacement of the counterweight system is realized; the slider 21 is connected to the displacement slide rail 14 and can slide relatively; the telescopic device 22 is the power mechanism of the displacement counterweight system, which provides power for the displacement of the counterweight system; The swing bracket 3 is X-shaped, and is composed of a first swing bracket body 31, a second swing bracket body 32, and a centering connection block 33. The centering connection block 33 superimposes the first swing bracket body 31 and the second swing bracket body 32 together. The first swing bracket body 31 and the second swing bracket body 32 have a first connection hole 34 at the same side end, and the first swing bracket body 31 and the second swing bracket body 32 have a second connection hole 35 and a third connection hole 36 at the other side end; the first connection hole 34 is connected to the swing bracket connecting shaft 24; the second connection hole 35 is connected to the secondary telescopic device 4; the third connection hole 36 is connected to the counterweight bracket 5; the centering connection block 33 is connected to the centering slide rail 12 to prevent the mechanism from eccentric movement The counterweight bracket 5 includes a counterweight bracket body 51, a first connecting shaft 52 and a second connecting shaft 53. The first connecting shaft 52 and the second connecting shaft 53 are arranged on the same side of the counterweight bracket body 51. The first connecting shaft 52 and the second connecting shaft 53 are respectively connected to the swing bracket 3 and the secondary telescopic device 4.

[0034] The primary telescopic mechanism 2 and the secondary telescopic device 4 are oil cylinders.

[0035] The displacement slide rail 14 is a linear rail.

[0036] The swing bracket 3 is arranged in left and right manner.

[0037] The first swing bracket body 31 and the second swing bracket body 32 are provided with a second connection hole 35 and a third connection hole 36 at one end thereof, and are of a multi-layer plate structure.

[0038] The working process and working principle of this embodiment: The movement of the telescopic device 22 in the primary telescopic mechanism 2 drives the slider 21 to slide back and forth on the counterweight bracket 1, and the sliding of the slider 21 drives the swing bracket 3 to swing. At this time, the secondary telescopic device 4, the counterweight bracket 5, the counterweight block 6 and the swing bracket 3 swing together to achieve the swing displacement of the counterweight block 6. After the swing displacement is completed, the movement of the secondary telescopic device 4 drives the counterweight bracket 5 to swing, and further displacement of the counterweight block 6 is achieved.

[0039] The method of changing the counterweight in working state is as follows: Before the work starts, the counterweight system is in the first position, at which time the primary telescopic mechanism 2 is in a fully extended state, and the secondary telescopic device 4 is in an initial state.

[0040] At the beginning of the operation, the primary telescopic mechanism 2 retracts, driving the swing bracket 3 to swing toward the rear side of the counterweight bracket 1. At this time, the secondary telescopic device 4, the counterweight bracket 5, and the counterweight block 6 swing together with the swing bracket 3. When the primary telescopic mechanism 2 reaches the fully retracted state, the counterweight system swings to the second position to achieve the swing displacement of the counterweight system. After reaching the second position, the secondary telescopic device 4 begins to extend, pushing the counterweight bracket 5 to continue to swing toward the rear side of the counterweight bracket 1. When the secondary telescopic device 4 reaches the fully extended state, the counterweight system swings to the third position to achieve further displacement of the counterweight system. The counterweight system can be swung from the third position to the first position in the reverse order.

[0041] The method of changing the balance weight in transition state is as follows: Before starting work, remove the counterweight block 6 in the counterweight system. If the counterweight system is in the first position, the counterweight system is shifted to the second position according to the counterweight shifting method in the working state; if it is in the second position / third position, it can be directly shifted to the transition state.

[0042] At the beginning of work, the first-level telescopic mechanism 2 is fixed, and the second-level telescopic device 4 retracts, pushing the counterweight bracket 5 to swing toward the front side of the counterweight bracket 1. When the second-level telescopic device 4 reaches the fully retracted state, the counterweight system swings to the fourth position. At this time, the width of the counterweight system meets the road driving requirements, realizing the transition state displacement of the counterweight system.

[0043] The counterweight system can be swung from the fourth position to the previous position in the reverse order.

Claims

1. A displacement counterweight mechanism, characterized in that: It comprises a counterweight bracket (1), a primary telescopic mechanism (2), a swing bracket (3), a counterweight bracket (5) and a counterweight block (6); The first-stage telescopic mechanism (2) is arranged at the lower part of the counterweight bracket (1), one end of the swing bracket (3) is connected to the first-stage telescopic mechanism (2), the other end of the swing bracket (3) is connected to the counterweight bracket (5), and the counterweight block (6) is placed on the counterweight bracket (5); The counterweight support (1) comprises a counterweight support body (11), a slide rail fixing device (13) is fixedly provided at one end of the bottom surface of the counterweight support body (11), a displacement slide rail (14) is fixedly provided on the slide rail fixing device (13), a telescopic device mounting hole (15) is provided on the slide rail fixing device (13), the displacement slide rail (14) is nestedly connected with a slider (21) in a first-stage telescopic mechanism (2); the telescopic device mounting hole (15) is connected with a telescopic device fixing shaft (23) in the first-stage telescopic mechanism (2); The primary telescopic mechanism (2) comprises two sliders (21), a telescopic device (22), a telescopic device fixing shaft (23) and two swing bracket connecting shafts (24); the telescopic device fixing shaft (23) is arranged in the middle of the telescopic device (22); the two swing bracket connecting shafts (24) are arranged at both ends of the telescopic device (22); the two sliders (21) are respectively fixedly arranged on the sides of the two swing bracket connecting shafts (24); the telescopic device fixing shaft (23) is connected to the telescopic device mounting hole (12) for fixing the telescopic device (22); the swing bracket connecting shaft (24) is connected to the swing bracket (3) for transmitting the power provided by the telescopic device (22) to the swing bracket (3); The swing bracket (3) is composed of a first swing bracket body (31), a second swing bracket body (32), and a centering connection block (33). The centering connection block (33) connects the first swing bracket body (31) and the second swing bracket body (32) together. The first swing bracket body (31) and the second swing bracket body (32) are provided with a first connection hole (34) at the same end, and the first swing bracket body (31) and the second swing bracket body (32) are provided with a second connection hole (35) and a third connection hole (36) at the other end. The first connection hole (34) is connected to the swing bracket connecting shaft (24). The second connection hole (35) is connected to the secondary telescopic device (4). The third connection hole (36) is connected to the counterweight bracket (5). The centering connection block (33) is connected to the centering slide rail (12) to prevent the mechanism from performing eccentric movement. The counterweight bracket (5) comprises a counterweight bracket body (51), a first connecting shaft (52) and a second connecting shaft (53), wherein the first connecting shaft (52) and the second connecting shaft (53) are arranged on the same side of the counterweight bracket body (51), and the first connecting shaft (52) is connected to the swing bracket (3).

2. A displacement counterweight mechanism according to claim 1, characterized in that: A secondary telescopic device (4) is provided between the counterweight bracket (5) and the swing bracket (3); one end of the swing bracket (3) is connected to the primary telescopic mechanism (2); the other end of the swing bracket (3) is respectively connected to the secondary telescopic device (4) and the counterweight bracket (5); the other end of the secondary telescopic device (4) is connected to the other end of the counterweight bracket (5); a counterweight block (6) is placed on the counterweight bracket (5); and a second connecting shaft (53) is connected to the secondary telescopic device (4).

3. A displacement counterweight mechanism according to claim 2, characterized in that: The primary telescopic mechanism (2) and the secondary telescopic device (4) are oil cylinders.

4. The displaceable counterweight mechanism according to claim 1, characterized in that: The first-stage telescopic mechanism (2) is a double oil cylinder.

5. The displaceable counterweight mechanism according to claim 1, characterized in that: A centering slide rail (12) is provided in the middle of the bottom surface of the counterweight support body (11), and the centering slide rail (12) is connected to the swing support (3) to prevent the swing support (3) from eccentric movement.

6. The displaceable counterweight mechanism according to claim 1, characterized in that: The displacement slide rail (14) is a linear rail or a circular rail.

7. The displaceable counterweight mechanism according to claim 1, characterized in that: The swing bracket (3) is arranged in a left-right manner or in an up-down manner.

8. The displaceable counterweight mechanism according to claim 1, characterized in that: One end of the first swing bracket body (31) and the second swing bracket body (32) where the second connection hole (35) and the third connection hole (36) are formed is a single-layer plate or a multi-layer plate structure.

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