Sliding rotary counterweight system and use method thereof

Abstract

The invention discloses a sliding and rotating type counterweight system which comprises a sliding and rotating device and a counterweight block, the counterweight block is assembled on the sliding and rotating device, and the counterweight block is driven to move through simultaneous sliding and rotating movement of a base on a support, so that the gyration radius and the gravity center position of a counterweight are changed. And a larger displacement distance is realized. Meanwhile, the invention discloses a using method of the balancing weight system. The gravity center position and the turning radius of the balancing weight are variable, and the larger displacement distance of the balancing weight is achieved; under the same condition, the weight of the balancing weight is reduced, the crane turning radius is reduced, the system reliability is improved, and narrow space operation is adapted.

Description

Technical Field

[0001] The invention relates to the field of counterweights, and in particular to a sliding and rotating counterweight system and a use method thereof. 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] Prior art such as patent CN202210508741.5 provides a rotary counterweight, which mainly includes a base frame, a bracket, a rocker arm, a telescopic mechanism and a counterweight, and the bracket and the base frame are connected by a rotating shaft. The counterweight in this mechanism can push the bracket to swing back and forth around the base frame through the telescopic mechanism to achieve the change of the counterweight position. However, the rotary counterweight is limited by the structure and the travel of the telescopic mechanism, and the displacement distance of the counterweight is limited. If the displacement distance is increased by moving the center of gravity of the counterweight block outward, the bending moment on the rotating shaft will increase sharply, and the reliability of the counterweight system will be greatly reduced.

[0004] In order to solve the technical problems of using as little counterweight as possible to maximize lifting performance and adapt to more narrow working spaces, it is necessary to develop new counterweight displacement mechanisms and methods in a targeted manner, which can reduce the weight of the counterweight and the slewing radius of the crane under the same conditions, improve system reliability, and adapt to operations in narrow spaces. Summary of the invention

[0005] Purpose of the invention: In view of the shortcomings and defects of the prior art, the present invention provides a sliding rotating counterweight system and a method of using the same, so as to realize variable center of gravity position and turning radius of the counterweight and achieve a larger displacement distance of the counterweight; under the same conditions, the weight of the counterweight is reduced, the turning radius of the crane is reduced, the reliability of the system is improved, and the system is adapted to operations in narrow spaces.

[0006] Technical solution: A sliding and rotating counterweight system of the present invention is characterized in that it includes a sliding and rotating device and a counterweight block, wherein the counterweight block is assembled on the sliding and rotating device, and the base simultaneously slides and rotates on the bracket to drive the counterweight block to move, thereby changing the turning radius and center of gravity position of the counterweight and achieving a larger displacement distance.

[0007] Among them, the sliding and rotating device includes a bracket, a slide, a telescopic device, a connecting device and a base. The bracket and the slide are connected by a slide rail and a slide groove, the slide is connected to the base by a hinge point, and the base can rotate relative to the slide; the telescopic device provides power for the sliding and rotating device; the two ends of the connecting device are respectively connected to the bracket and the base, and the connecting device drives the base to rotate while the slide slides.

[0008] Among them, the bracket is provided with a slide rail, a connection point one and a connection point two, and the slide rail serves as a relative sliding mechanism between the bracket and the slide frame to provide guidance and support for the sliding mechanism; the connection point one is connected to the connecting device, and the connecting device can rotate around the connection point one, and the connection point two is connected to the telescopic device.

[0009] Among them, the slide is provided with a slide groove, a connection point three and a connection point four, and the slide groove and the slide rail cooperate with each other to realize the sliding of the slide; the connection point three is connected to the telescopic device, the connection point four is connected to the base, and the base rotates around the connection point four.

[0010] Wherein, the slide is a single-stage or multi-stage slide, and when the slide slides, it drives the base to slide.

[0011] Among them, one end of the telescopic device is connected to the bracket, and the other end is connected to the slide; the telescopic device serves as a power device in the sliding and rotating device to provide power for the sliding and rotation of the sliding and rotating device.

[0012] Among them, one end of the connecting device is connected to the bracket, and the other end is connected to the base. When the slide frame slides, the base is driven to rotate through the connection of the connecting device. The connecting device is a rigid mechanism or a retractable mechanism.

[0013] Wherein, the base is provided with connection point five and connection point six, connection point five is connected to the connection device, and connection point six is ​​connected to the slide.

[0014] The method for using the sliding and rotating counterweight system of the present invention is to drive the slide to slide back and forth on the bracket through the movement of the telescopic device in the sliding and rotating device, and the sliding of the slide drives the base and the counterweight to slide, thereby realizing the change of the center of gravity position and the rotation radius of the counterweight; while sliding, the bracket and the base are connected by a connecting device, and together with the slide, a connecting rod mechanism is formed to drive the base and the counterweight to rotate, thereby realizing a larger displacement distance of the counterweight.

[0015] Before the work starts, the slide is in the first position, and the telescopic device is in a fully retracted state; when the work starts, the telescopic device extends, driving the slide, the base and the counterweight to slide toward the rear side of the bracket. Since the bracket, the slide, the connecting device and the base form a connecting rod mechanism, the sliding of the slide drives the connecting device to rotate around the connecting point on the bracket, so that the base and the counterweight rotate around the connecting point while sliding, further increasing the displacement distance of the counterweight;

[0016] Or before work starts, the slide is in the second position, and the telescopic device is in a fully extended state; when work starts, the telescopic device retracts, driving the slide, base and counterweight to slide toward the front of the bracket. Since the bracket, slide, connecting device and base form a connecting rod mechanism, the sliding of the slide drives the connecting device to rotate around the connecting point on the bracket, so that the base and the counterweight rotate around the connecting point while sliding, further increasing the displacement distance of the counterweight.

[0017] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages: The counterweight system of the present invention is composed of a sliding rotating device and a counterweight block to form a stable and reliable connection mechanism. The sliding of the slide and the rotation of the connecting device enable the counterweight block to slide and rotate at the same time, change the center of gravity position of the counterweight and the rotation radius of the counterweight, and achieve a larger displacement distance of the counterweight. The center of gravity position and the rotation radius of the counterweight are variable, and a larger displacement distance of the counterweight is achieved; under the same conditions, the weight of the counterweight is reduced, the rotation radius of the crane is reduced, the system reliability is improved, and it is suitable for operations in narrow spaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural schematic diagram of a crane in the prior art;

[0019] Figure 2 The structure of the present invention is schematically shown Figure 1 ;

[0020] Figure 3 The structure of the present invention is schematically shown Figure 2 ;

[0021] Figure 4 It is a schematic diagram of the structure of the support of the present invention;

[0022] Figure 5 It is a structural schematic diagram of the slide of the present invention;

[0023] Figure 6 It is a structural schematic diagram of the base of the present invention;

[0024] Figure 7 It is a structural schematic diagram of the first position of the present invention;

[0025] Figure 8It is a structural schematic diagram of the second position of the present invention;

[0026] In the figure, 1 is a sliding rotating device; 2 is a counterweight; 11 is a bracket; 12 is a slide; 13 is a telescopic device; 14 is a connecting device; 15 is a base; 111 is a slide rail; 112 is a connection point one; 113 is a connection point two; 121 is a slide slot; 122 is a connection point three; 123 is a connection point four; 151 is a connection point five; and 152 is a connection point six. DETAILED DESCRIPTION

[0027] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0028] The crane of the present invention refers to a multi-action machine that can lift vertically and carry heavy objects horizontally within a certain range. The turntable refers to the structural component on the crane used for the vehicle rotation, and is the main force-bearing structure when the crane is lifting weights. The counterweight refers to the weight installed at the tail of the turntable, which is mainly used to balance the tipping moment generated when the crane is lifting weights, so as to maintain the stability of the whole machine. The center of gravity position refers to the position of the center of gravity of the counterweight relative to the center of rotation, which directly affects the tipping moment of the crane. The displacement distance refers to the change distance of the center of gravity position of the counterweight. The turning radius refers to the distance from the farthest point of the counterweight to the turning axis of the turntable.

[0029] like Figure 2 The sliding and rotating counterweight system of the present invention comprises a sliding and rotating device 1 and a counterweight block 2. The counterweight block 2 is assembled on the sliding and rotating device 1, and the base 15 simultaneously slides and rotates on the bracket 11 to drive the counterweight block 2 to move, thereby changing the turning radius and center of gravity position of the counterweight, and achieving a larger displacement distance. The counterweight system consists of a sliding and rotating device 1 and a counterweight block 2. The sliding and rotating device 1 is the main bearing part and function realization part of the counterweight system. The sliding and rotating device 1 is fixedly connected to the vehicle turntable part.

[0030] like Figure 3 The sliding and rotating device 1 includes a bracket 11, a slide 12, a telescopic device 13, a connecting device 14 and a base 15. The bracket 11 and the slide 12 are connected through a slide rail 111 and a slide groove 121. The slide 12 and the base 15 are connected through a hinge point, and the base 15 can rotate relative to the slide 12; the telescopic device 13 provides power for the sliding and rotating device 1; the two ends of the connecting device 14 are respectively connected to the bracket 11 and the base 15, and the connecting device 14 drives the base 15 to rotate while the slide 12 slides.

[0031] like Figure 4The bracket 11 is provided with a slide rail 111, a connection point 112 and a connection point 2 113. The slide rail 111 serves as a relative sliding mechanism between the bracket 11 and the slide 12 to provide a guide and support function for the sliding mechanism; the connection point 112 is connected to the connecting device 14, and the connecting device 14 can rotate around the connection point 112; the connection point 2 113 is connected to the telescopic device 13.

[0032] like Figure 5 The slide 12 is provided with a slide groove 121, a third connection point 122 and a fourth connection point 123. The slide groove 121 cooperates with the slide rail 111 to realize the sliding of the slide 12. The third connection point 122 is connected to the telescopic device 13, and the fourth connection point 123 is connected to the base 15. The base 15 rotates around the fourth connection point 123. The slide 12 is a single-stage or multi-stage slide. When the slide 12 slides, it drives the base 15 to slide.

[0033] One end of the telescopic device 13 is connected to the bracket 11, and the other end is connected to the slide 12; the telescopic device 13 serves as a power device in the sliding and rotating device 1, providing power for the sliding and rotating device 1. One end of the connecting device 14 is connected to the bracket 11, and the other end is connected to the base 15. When the slide 12 slides, the base 15 is driven to rotate through the connection of the connecting device 14. The connecting device 14 is a rigid mechanism or a telescopic mechanism.

[0034] like Figure 6 The base 15 is provided with a connection point five 151 and a connection point six 152 , the connection point five 151 is connected to the connection device 14 , and the connection point six 152 is connected to the slide 12 .

[0035] In the present invention, the telescopic device 13 in the sliding rotation device 1 drives the slide 12 to slide back and forth on the bracket 11, and the sliding of the slide 12 drives the base 15 and the counterweight 2 to slide, thereby realizing the change of the center of gravity position and the rotation radius of the counterweight 2; while sliding, the bracket 11 and the base 15 are connected by the connecting device 14, and together with the slide 12, a connecting rod mechanism is formed to drive the base 15 and the counterweight 2 to rotate, thereby realizing a larger displacement distance of the counterweight 2.

[0036] like Figure 7 Before the work starts, the slide 12 is in the first position, and the telescopic device 13 is in a fully retracted state; when the work starts, the telescopic device 13 extends, driving the slide 12, the base 15 and the counterweight 2 to slide toward the rear side of the bracket 11. Since the bracket 11, the slide 12, the connecting device 14 and the base 15 form a connecting rod mechanism, the sliding of the slide 12 drives the connecting device 14 to rotate around the connecting point 112 on the bracket 11, so that the base 15 and the counterweight 2 rotate around the connecting point 123 while sliding, further increasing the displacement distance of the counterweight 2;

[0037] like Figure 8, or before the start of work, the slide 12 is in the second position, and the telescopic device 13 is in a fully extended state; when the work starts, the telescopic device 13 retracts, driving the slide 12, the base 15 and the counterweight 2 to slide toward the front side of the bracket 11. Since the bracket 11, the slide 12, the connecting device 14 and the base 15 form a connecting rod mechanism, the sliding of the slide 12 drives the connecting device 14 to rotate around the connecting point 112 on the bracket 11, so that the base 15 and the counterweight 2 rotate around the connecting point 123 while sliding, thereby further increasing the displacement distance of the counterweight 2.

[0038] The present invention can adopt a gear rack or pulley mechanism to replace the slide rail and slide groove mechanism; adopt a rolling guide pair to replace the sliding guide pair; the slide frame can be a single-stage or multi-stage slide frame; the slide rail and the slide groove can be used interchangeably.

[0039] The counterweight system of the present invention is composed of a sliding rotating device and a counterweight block to form a stable and reliable connection mechanism. The sliding of the carriage and the rotation of the connecting device enable the counterweight block to slide and rotate at the same time, change the center of gravity position of the counterweight and the rotation radius of the counterweight, and achieve a larger displacement distance of the counterweight. The center of gravity position and the rotation radius of the counterweight are variable, and a larger displacement distance of the counterweight is achieved; under the same conditions, the weight of the counterweight is reduced, the rotation radius of the crane is reduced, the system reliability is improved, and it is suitable for operations in narrow spaces.

Claims

1. A sliding rotary counterweight system, characterized in that: The invention comprises a sliding rotation device (1) and a balancing weight (2), wherein the balancing weight (2) is mounted on the sliding rotation device (1), and a base (15) is used to slide and rotate on a bracket (11) at the same time, thereby driving the balancing weight (2) to move, thereby changing the rotation radius and the center of gravity position of the balancing weight, and achieving a larger displacement distance.

2. The sliding and rotating counterweight system according to claim 1, characterized in that: The sliding and rotating device (1) comprises a bracket (11), a slide (12), a telescopic device (13), a connecting device (14) and a base (15); the bracket (11) and the slide (12) are connected via a slide rail (111) and a slide groove (121); the slide (12) and the base (15) are connected via a hinge point; the base (15) can rotate relative to the slide (12); the telescopic device (13) provides power for the sliding and rotating device (1); the two ends of the connecting device (14) are respectively connected to the bracket (11) and the base (15); the connecting device (14) drives the base (15) to rotate while the slide (12) slides.

3. The sliding and rotating counterweight system according to claim 2, characterized in that: The support (11) is provided with a slide rail (111), a connection point 1 (112) and a connection point 2 (113); the slide rail (111) serves as a relative sliding mechanism between the support (11) and the slide frame (12) to provide a guide and support function for the sliding mechanism; the connection point 1 (112) is connected to a connecting device (14), and the connecting device (14) can rotate around the connection point 1 (112); the connection point 2 (113) is connected to the telescopic device (13).

4. The sliding and rotating counterweight system according to claim 1, characterized in that: The slide (12) is provided with a slide groove (121), a connection point three (122) and a connection point four (123), and the slide groove (121) and the slide rail (111) cooperate with each other to realize the sliding of the slide (12); the connection point three (122) is connected to the telescopic device (13), the connection point four (123) is connected to the base (15), and the base (15) rotates around the connection point four (123).

5. The sliding and rotating counterweight system according to claim 4, characterized in that: The slide (12) is a single-stage or multi-stage slide, and when the slide (12) slides, it drives the base (15) to slide.

6. The sliding and rotating counterweight system according to claim 1, characterized in that: One end of the telescopic device (13) is connected to the bracket (11), and the other end is connected to the slide (12); the telescopic device (13) serves as a power device in the sliding and rotating device (1), providing power for the sliding and rotating device (1).

7. The sliding and rotating counterweight system according to claim 1, characterized in that: One end of the connecting device (14) is connected to the bracket (11), and the other end is connected to the base (15). When the slide (12) slides, the base (15) is driven to rotate through the connection of the connecting device (14). The connecting device (14) is a rigid mechanism or a retractable mechanism.

8. The sliding and rotating counterweight system according to claim 1, characterized in that: The base (15) is provided with a fifth connection point (151) and a sixth connection point (152), wherein the fifth connection point (151) is connected to the connection device (14), and the sixth connection point (152) is connected to the slide frame (12).

9. The method for using the sliding rotary counterweight system according to any one of claims 1 to 8, characterized in that: The telescopic device (13) in the sliding rotation device (1) drives the slide (12) to slide back and forth on the bracket (11), and the sliding of the slide (12) drives the base (15) and the counterweight (2) to slide, thereby achieving changes in the center of gravity position and the rotation radius of the counterweight (2); while sliding, the bracket (11) and the base (15) are connected by a connecting device (14), and together with the slide (12), a connecting rod mechanism is formed to drive the base (15) and the counterweight (2) to rotate, thereby achieving a larger displacement distance of the counterweight (2).

10. The method for using the sliding rotary counterweight system according to claim 9, characterized in that: Before the operation starts, the slide (12) is in the first position, at which time the telescopic device (13) is in a fully retracted state; when the operation starts, the telescopic device (13) extends, driving the slide (12), the base (15) and the counterweight (2) to slide toward the rear side of the bracket (11); since the bracket (11), the slide (12), the connecting device (14) and the base (15) form a connecting rod mechanism, the sliding of the slide (12) drives the connecting device (14) to rotate around the connecting point (112) on the bracket (11), so that the base (15) and the counterweight (2) rotate around the connecting point (123) while sliding, thereby further increasing the displacement distance of the counterweight (2); Alternatively, before the start of work, the slide (12) is in the second position, at which time the telescopic device (13) is in a fully extended state; when the work starts, the telescopic device (13) retracts, driving the slide (12), the base (15) and the counterweight (2) to slide toward the front side of the bracket (11); since the bracket (11), the slide (12), the connecting device (14) and the base (15) form a connecting rod mechanism, the sliding of the slide (12) drives the connecting device (14) to rotate around the connecting point (112) on the bracket (11), so that the base (15) and the counterweight (2) rotate around the connecting point (123) while sliding, thereby further increasing the displacement distance of the counterweight (2).

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