Counterweight moving device and working machine

Abstract

The invention relates to the technical field of engineering machinery, and discloses a counterweight moving device and an operation machine, and the counterweight moving device comprises a first support, a second support, a counterweight and a driving part. The counter weight can slide on the first support and the second support, and the driving piece is used for driving the counter weight to move in the direction close to or away from the rotary table. The second support can be switched between a folded state and an unfolded state, and in the unfolded state, the second support is flush with the first support. The second support can be rotationally switched between the folded state and the unfolded state relative to the first support, so that when the second support is folded, the length of the whole vehicle is shortened, the road driving requirement is met, and potential safety hazards in the driving process are reduced; when the second support is unfolded, the driving piece can drive the balance weight to slide on the first support and the second support, the distance between the gravity center of the balance weight and the rotation center of the rotary table is adjusted, and therefore under the condition that the weight of the balance weight is not increased, the lifting performance of equipment is greatly improved, and the stability of the whole machine is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering machinery, and in particular to a counterweight moving device and an operating machine. Background Art

[0002] Construction machinery such as cranes are widely used in ports, docks, stations, warehouses, construction sites, etc. Among them, counterweight is an important part of the crane and an important guarantee for its lifting performance.

[0003] In order to improve the lifting performance and stability of the equipment at a lower cost, the crane uses a mobile counterweight, and improves the lifting performance and stability of the whole machine by adjusting the distance between the center of gravity of the counterweight and the rotation center of the turntable. However, this will cause the whole vehicle to be too long, which does not meet the road driving requirements, resulting in the equipment being unable to go on the road normally. At the same time, it increases the turning radius of the equipment, which poses certain safety hazards and affects the competitiveness of the product. Summary of the invention

[0004] The present invention provides a counterweight moving device and an operating machine to solve or improve the problem that in the related art, a crane adopts a mobile counterweight, which results in the entire vehicle being too long and not meeting road driving requirements, and increases the turning radius of the equipment, posing certain safety hazards and affecting product competitiveness.

[0005] In a first aspect, the present invention provides a counterweight moving device, comprising:

[0006] A first bracket, used for connecting with the turntable;

[0007] a counterweight connected to the first bracket and adapted to slide on the first bracket;

[0008] a second bracket, rotatably connected to a side of the first bracket away from the turntable, the second bracket being switchable between a retracted state and an extended state; wherein in the extended state, the second bracket is arranged flush with the first bracket, and the counterweight is capable of sliding from the first bracket to the second bracket and is suitable for sliding on the second bracket;

[0009] A driving member, one end of which is connected to the counterweight and the other end of which is connected to the turntable, wherein the driving member is used to drive the counterweight to move toward or away from the turntable.

[0010] In an optional embodiment, the first bracket is provided with a first track, and the counterweight is slidably connected to the first track;

[0011] The second bracket is provided with a second track, and the counterweight is slidably connected to the second track;

[0012] When the second bracket is in the unfolded state, the second track is aligned with and flush with the first track.

[0013] In an optional embodiment, the number of the first rails is at least two, the plurality of first rails are distributed at intervals along the width direction of the first bracket, and the second rails correspond to the first rails one by one.

[0014] In an optional implementation, it also includes:

[0015] The roller is rotatably connected to the counterweight, and when the counterweight moves, the roller is suitable for rolling on the first track and the second track.

[0016] In an optional implementation, it also includes:

[0017] A connecting frame connected to the turntable, wherein the first bracket is connected to the bottom of the connecting frame, and in the retracted state, the second bracket abuts against the side of the connecting frame;

[0018] The reinforcement member is in a foldable structure, one end of which is connected to the connecting frame and the other end of which is connected to the second bracket. In the retracted state, the reinforcement member is in a bent state; in the unfolded state, the reinforcement member is in an extended state.

[0019] In an optional implementation, it also includes:

[0020] The limiting mechanism is used to limit and fix the second bracket in the retracted state to prevent the second bracket from tipping over.

[0021] In an optional implementation, the limiting mechanism includes:

[0022] Matching limiting members and limiting holes, the connecting frame and the second bracket are respectively provided with relative limiting holes, and in the retracted state, the limiting members are inserted into the limiting holes to limit and fix the second bracket and the connecting frame.

[0023] In an optional implementation, it also includes:

[0024] An annular rib, arranged at one end of the limiting member;

[0025] A stopper, arranged at the other end of the limiting member, the stopper being detachably connected to the limiting member;

[0026] The annular rib and the stopper are suitable for preventing the limiting member from falling off from the limiting hole in the retracted state.

[0027] In an optional embodiment, the driving member is an oil cylinder or a pneumatic cylinder.

[0028] In a second aspect, the present invention further provides a working machine, comprising a counterweight moving device as described in any one of the above items.

[0029] The counterweight moving device provided by the present invention can be rotated and switched between a folded state and an unfolded state relative to the first bracket through the second bracket, so that when the second bracket is folded, the length of the entire vehicle is shortened to meet road driving requirements, and the turning radius of the equipment is reduced, thereby reducing safety hazards during driving; when the second bracket is unfolded, the driving member can drive the counterweight to slide on the first bracket and the second bracket, and adjust the distance between the center of gravity of the counterweight and the rotation center of the turntable, so as to greatly improve the lifting performance of the equipment without increasing the weight of the counterweight, improve the stability of the entire machine, and enhance the product competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a schematic diagram of the structure of the counterweight moving device in the stowed state according to an embodiment of the present invention;

[0032] Figure 2 This is a second structural schematic diagram of the counterweight moving device in the stowed state according to an embodiment of the present invention;

[0033] Figure 3 It is a schematic structural diagram of a counterweight moving device in an expanded state according to an embodiment of the present invention;

[0034] Figure 4 Schematic diagram of the structure of a limiter according to an embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 1. First bracket; 101. First track; 1011. First slide; 2. Turntable; 201. First hinged seat; 3. Counterweight; 301. Second hinged seat; 4. Second bracket; 401. Second track; 4011. Second slide; 402. Ear plate; 5. Driving member; 6. Roller; 7. Reinforcement member; 8. Limiting member; 801. Annular rib; 802. Stopper; 9. Limiting hole; 10. Connecting frame; 1001. Bottom; 1002. Side. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0038] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" refers to two or more, unless otherwise clearly and specifically defined.

[0039] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0041] Combine the following Figures 1 to 4, describing the counterweight moving device and working machinery of the embodiments of the present invention.

[0042] According to an embodiment of the present invention, on the one hand, a counterweight moving device is provided, which is suitable for use in cranes, excavators, rotary drilling rigs, etc. The counterweight moving device includes a first bracket 1, a counterweight 3, a second bracket 4, and a driving member 5. Specifically, as Figure 1 As shown, the first bracket 1 is used to connect with the turntable 2. The counterweight 3 is connected with the first bracket 1 and is suitable for sliding on the first bracket 1. Therefore, the counterweight 3 can rotate with the turntable 2, and the counterweight 3 can also slide on the first bracket 1 to change the distance between the center of gravity of the counterweight 3 and the rotation center of the turntable 2.

[0043] The second bracket 4 is rotatably connected to the first bracket 1 at a side away from the turntable 2, for example, by a hinge. The second bracket 4 can be switched between a stowed state and an unfolded state. Specifically, Figure 1 As shown, in the stowed state, the second bracket 4 can be rotated to a vertical position, at which time the counterweight 3 is located on the first bracket 1. Figure 3 As shown, in the unfolded state, the second bracket 4 can be rotated to a horizontal position. At this time, the second bracket 4 is arranged flush with the first bracket 1, and the counterweight 3 can slide from the first bracket 1 to the second bracket 4 and is suitable for sliding on the second bracket 4, thereby expanding the movement range of the counterweight 3, and then the distance between the center of gravity of the counterweight 3 and the rotation center of the turntable 2 can be increased as needed.

[0044] One end of the driving member 5 is connected to the counterweight 3, and the other end is connected to the turntable 2. The driving member 5 is used to drive the counterweight 3 to move toward or away from the turntable 2. Specifically, Figure 1 As shown, the driving member 5 is connected to the counterweight 3 through its telescopic end to drive the counterweight 3 to reciprocate therewith, thereby realizing the displacement function of the counterweight 3.

[0045] With such an arrangement, the second bracket 4 can be rotated and switched between a folded state and an unfolded state relative to the first bracket 1, so that when the second bracket 4 is folded, the length of the entire vehicle is shortened to meet road driving requirements, ensure that the equipment can be driven on the road normally, and reduce the turning radius of the equipment to reduce safety hazards during driving; when the second bracket 4 is unfolded, the driving member 5 can drive the counterweight 3 to slide on the first bracket 1 and the second bracket 4, and adjust the distance between the center of gravity of the counterweight 3 and the rotation center of the turntable 2, so as to greatly improve the lifting performance of the equipment without increasing the weight of the counterweight, improve the stability of the entire machine, and enhance the competitiveness of the product.

[0046] In some embodiments of the present invention, Figure 3 As shown, the first bracket 1 is provided with a first track 101, and the counterweight 3 is slidably connected to the first track 101. Specifically, as Figure 1As shown, the first track 101 can be formed by bending a metal plate in one piece, so that it not only has the advantages of high precision, high strength and good surface quality, but also can ensure that the track meets various performance requirements. The first track 101 has a first slide groove 1011, and the counterweight 3 can slide along the first slide groove 1011, so as to ensure that the counterweight 3 can slide in a certain direction, ensuring the safe operation of the entire system.

[0047] The second bracket 4 is provided with a second track 401, and the counterweight 3 is slidably connected to the second track 401. Figure 2 As shown, the second rail 401 can be formed by bending a metal plate in one piece, thereby ensuring that the rail has good load-bearing capacity, high precision and strength, and extending its service life. The second rail 401 has a second slide groove 4011. When the counterweight 3 slides onto the second bracket 4, the counterweight 3 can slide along the second slide groove 4011, thereby providing a certain movement path for the counterweight 3, realizing precise mechanical positioning and movement control.

[0048] like Figure 3 As shown, when the second bracket 4 is in the unfolded state, the second track 401 is aligned and flush with the first track 101. In this way, the counterweight 3 can smoothly transition from the first track 101 to the second track 401 and slide along a predetermined track, thereby improving the stability of the movement and enhancing the safety and reliability of the device.

[0049] Further, in some embodiments of the present invention, Figure 2 As shown, the number of first rails 101 is at least two, and the plurality of first rails 101 are spaced apart along the width direction of the first bracket 1, and the second rails 401 correspond one to one with the first rails 101. It should be noted that the number of first rails 101 and second rails 401 can be specifically determined according to actual design requirements.

[0050] In this way, by arranging multiple sets of opposite first rails 101 and second rails 401, the gravity of the weight 3 can be dispersed, the stability and balance of the device can be improved, the reliable sliding of the weight 3 can be fully guaranteed, and the safety of the device can be improved. Figure 2 As for the placement position of the counterweight moving device shown in the figure, the direction indicated by the arrow in the figure is the width direction of the first bracket 1.

[0051] Preferably, in some embodiments of the present invention, Figure 1As shown, the counterweight moving device further includes a roller 6, which is rotatably connected to the counterweight 3. When the counterweight 3 moves, the roller 6 is suitable for rolling on the first track 101 and the second track 401. Specifically, there are multiple rollers 6, and the multiple rollers 6 are evenly distributed at the contact positions between the counterweight 3 and the track. The number of rollers 6 needs to be specifically determined according to actual design requirements.

[0052] In this way, by arranging the roller 6, the friction between the counterweight 3 and the track can be reduced, so that the movement of the counterweight 3 is more flexible, smooth and efficient. In addition, the roller 6 can also protect the track from wear to a certain extent, and improve the working efficiency and service life of the device.

[0053] In some embodiments of the present invention, Figure 3 As shown, the counterweight moving device further includes a reinforcement member 7 and a connecting frame 10. Specifically, the connecting frame 10 is connected to the turntable 2, for example, by welding, bolting, etc. Figure 1 As shown, the first bracket 1 is connected to the bottom 1001 of the connecting frame 10 , for example, by welding, bolting, etc. And in the retracted state, the second bracket 4 abuts against the side 1002 of the connecting frame 10 .

[0054] like Figure 3 As shown, one end of the reinforcement member 7 is connected to the connecting frame 10, and the other end of the reinforcement member 7 is connected to the second bracket 4. The reinforcement member 7 is a foldable structure. Figure 1 As shown in FIG. 1 , when the second bracket 4 is in the retracted state, the reinforcement member 7 is in a bent state. Figure 1 As shown, when the second bracket 4 is in the unfolded state, the reinforcing member 7 is in the straightened state. Specifically, the reinforcing member 7 can be a component with folding characteristics such as a chain, a rope or a connecting rod mechanism, and the two ends of the reinforcing member 7 are respectively hinged to the connecting frame 10 and the second bracket 4 to ensure its flexibility and convenience in use.

[0055] Such an arrangement, on the one hand, ensures that when in the retracted state, the reinforcement 7 can be easily folded and stored without interfering with the second bracket 4, adapting to the compact structural form so as not to affect the movement of the second bracket 4; on the other hand, when in the unfolded state, the reinforcement 7 is straightened, which can provide certain support and reinforcement for the second bracket 4, thereby improving the rigidity and strength of the second bracket 4, so that it can reliably carry the counterweight 3 and enhance the stability and safety of the device.

[0056] In addition, if Figure 3 As shown, the number of the reinforcing members 7 is at least two, and the plurality of reinforcing members 7 are spaced apart along the width direction of the second bracket 4, thereby further improving the structural stability of the second bracket 4. Figure 3As for the placement position of the counterweight moving device shown in the figure, the direction indicated by the arrow in the figure is the width direction of the second bracket 4.

[0057] Furthermore, in some embodiments of the present invention, the counterweight moving device further includes a limiting mechanism, which is used to limit and fix the second bracket 4 in the retracted state to prevent the second bracket 4 from tipping over. This arrangement plays a key role in fixing and limiting when the second bracket 4 is retracted. By providing a stable fixing point, the limiting mechanism can prevent the second bracket 4 from tipping over when not acted upon by external forces, thereby ensuring the safety and stability of the entire device. In addition, the device is made more compact in structure in the retracted state and is convenient for road transportation.

[0058] Specifically, in some embodiments of the present invention, Figure 1 As shown, the limiting mechanism includes a matching limiting member 8 and a limiting hole 9, and the limiting member 8 can be a pin. Figure 3 As shown, the connecting frame 10 and the second bracket 4 are respectively provided with relative limiting holes 9. Figure 1 As shown, when the second bracket 4 is in the retracted state, the connecting frame 10 is aligned with the limiting hole 9 on the second bracket 4, and the limiting member 8 is inserted into the limiting hole 9 to limit and fix the second bracket 4 and the connecting frame 10.

[0059] With such arrangement, when the second bracket 4 is in the retracted state, the second bracket 4 is fixed to the connecting frame 10 through the cooperation between the limiting member 8 and the limiting hole 9, thereby providing a stable and reliable fixing point, limiting the movement range of the second bracket 4, and preventing the second bracket 4 from tipping over or unfolding by itself when not affected by external force, thereby avoiding possible safety hazards or damage.

[0060] In addition, if Figure 3 As shown, at least two limiting holes 9 are respectively provided on the connecting frame 10 and the second bracket 4, and accordingly, the number of limiting members 8 is at least two, so as to ensure that the second bracket 4 remains stable in the retracted state and avoids accidental tipping. Further, the second bracket 4 is provided with an ear plate 402, and the ear plate 402 is provided with a limiting hole 9, so as to align and cooperate with the limiting hole 9 on the connecting frame 10.

[0061] Of course, in other embodiments, the limiting mechanism includes but is not limited to the matching form of the pin shaft and the pin hole, and other forms such as the snap form and the hook form can also be used to prevent the second bracket 4 from tipping over.

[0062] Preferably, in some embodiments of the present invention, the counterweight moving device further comprises an annular rib 801 and a stopper 802. The annular rib 801 and the stopper 802 are adapted to prevent the limiting member 8 from falling off from the limiting hole 9 in the retracted state. Figure 4As shown, the annular rib 801 is arranged at one end of the stopper 8, for example, the annular rib 801 and the stopper 8 can be integrally formed. The stopper 802 is arranged at the other end of the stopper 8, and the stopper 802 is detachably connected to the stopper 8. Specifically, the other end of the stopper 8 is provided with a through hole, and the stopper 802 can be a cotter pin, and the cotter pin is inserted into the through hole. Alternatively, the other end of the stopper 8 is provided with a threaded hole, and the stopper 802 can be a bolt, and the bolt is screwed into the threaded hole.

[0063] In this way, when the second bracket 4 is in the retracted state, Figure 1 As shown, the limiting member 8 is inserted into the limiting hole 9. At this time, the annular retaining edge 801 and the retaining member 802 at both ends of the limiting member 8 cooperate with each other, which can effectively prevent the limiting member 8 from falling off from the limiting hole 9, ensuring that the second bracket 4 is reliably fixed.

[0064] Of course, in other embodiments, the anti-slip structure of the limiter 8 includes but is not limited to a combination of an annular retaining edge 801 and a retainer 802, and may also adopt a pair of detachable retaining members 802, a snap-on structure, or the like to prevent the limiter 8 from falling off from the limiter hole 9.

[0065] In some embodiments of the present invention, the driving member 5 is an oil cylinder or a gas cylinder. Figure 3 As shown, the turntable 2 is provided with a first hinge seat 201, and one end of the driving member 5 is hinged to the first hinge seat 201 through a rotating shaft. Figure 1 As shown, a second hinge seat 301 is provided on the counterweight 3, and the other end of the driving member 5 is hinged to the second hinge seat 301 through a rotating shaft, thereby ensuring the flexibility of the movement of the driving member 5.

[0066] With such arrangement, the piston rod of the oil cylinder or the air cylinder can reliably drive the counterweight 3 to achieve the displacement function by making telescopic movement, and the oil cylinder or the air cylinder can also achieve the limiting function of the counterweight 3, ensuring that the counterweight 3 does not move again after displacement, thereby ensuring the reliability of the movement.

[0067] Of course, in other embodiments, the driving member 5 includes but is not limited to an oil cylinder or a pneumatic cylinder, and other linear driving mechanisms such as an electric telescopic rod and an electric cylinder may also be used. The specific selection type should be determined according to the actual application scenario and usage requirements to ensure that the counterweight moving device has stable and controllable telescopic or linear displacement capabilities.

[0068] In combination with the above embodiments, the counterweight moving device provided by the present invention is specifically described. In the embodiment of the present invention, the counterweight moving device is suitable for use in cranes, excavators, rotary drilling rigs, etc. The counterweight moving device includes a first bracket 1, a counterweight 3, a second bracket 4, a driving member 5, and a connecting frame 10. Specifically, as Figure 1As shown, the turntable 2 is connected to the connecting frame 10, and the first bracket 1 is connected to the bottom 1001 of the connecting frame 10. The counterweight 3 is connected to the first bracket 1 and is suitable for sliding on the first bracket 1. Therefore, the counterweight 3 can rotate with the turntable 2, and the counterweight 3 can also slide on the first bracket 1 to change the distance between the center of gravity of the counterweight 3 and the rotation center of the turntable 2.

[0069] The second bracket 4 is rotatably connected to the side of the first bracket 1 away from the turntable 2, for example, by a hinge connection, and the second bracket 4 can be switched between a retracted state and an extended state. Figure 1 As shown, when the second bracket 4 is in the retracted state, the second bracket 4 abuts against the side portion 1002 of the connecting frame 10. Figure 3 As shown, when the second bracket 4 is in the unfolded state, the second bracket 4 is arranged flush with the first bracket 1, and the counterweight 3 can slide from the first bracket 1 to the second bracket 4 and is suitable for sliding on the second bracket 4. Thus, the moving range of the counterweight 3 can be expanded, and then the distance between the center of gravity of the counterweight 3 and the rotation center of the turntable 2 can be increased as needed.

[0070] One end of the driving member 5 is connected to the counterweight 3, and the other end is connected to the turntable 2. The driving member 5 is used to drive the counterweight 3 to move toward or away from the turntable 2. Specifically, the driving member 5 is an oil cylinder or an air cylinder. Figure 3 As shown, the turntable 2 is provided with a first hinge seat 201, and one end of the driving member 5 is hinged to the first hinge seat 201 through a rotating shaft. Figure 1 As shown, a second hinge seat 301 is provided on the counterweight 3, and the other end of the driving member 5 is hinged to the second hinge seat 301 through a rotating shaft, thereby ensuring the flexibility of the movement of the driving member 5.

[0071] The counterweight moving device in this embodiment is simple to operate and has low implementation cost. The second bracket 4 can be rotated and switched relative to the first bracket 1 between a folded state and an unfolded state, so that when the second bracket 4 is folded, the length of the entire vehicle is shortened, road driving requirements are met, and safety hazards during driving are reduced; when the second bracket 4 is unfolded, the driving member 5 can drive the counterweight 3 to slide on the first bracket 1 and the second bracket 4, and adjust the distance between the center of gravity of the counterweight 3 and the rotation center of the turntable 2 to meet the requirements of different lifting performances of the equipment and improve the stability of the entire machine.

[0072] Specifically, in this embodiment, the first bracket 1 is provided with a first track 101, and the counterweight 3 is slidably connected to the first track 101. The second bracket 4 is provided with a second track 401, and the counterweight 3 is slidably connected to the second track 401. When the second bracket 4 is in the unfolded state, the second track 401 is aligned and flush with the first track 101. Therefore, the counterweight 3 can smoothly transition from the first track 101 to the second track 401 and slide along a predetermined track, thereby improving the stability of the movement and enhancing the safety and reliability of the device.

[0073] Preferably, there are at least two first rails 101, and the plurality of first rails 101 are spaced apart along the width direction of the first bracket 1, and the second rails 401 correspond to the first rails 101 one by one. This can further improve the stability and balance of the device and fully ensure the reliable sliding of the counterweight 3.

[0074] Furthermore, in this embodiment, the counterweight moving device further includes a roller 6, which is rotatably connected to the counterweight 3, and when the counterweight 3 moves, the roller 6 is suitable for rolling on the first track 101 and the second track 401. The number of rollers 6 can be multiple, and the multiple rollers 6 are evenly distributed at the contact position between the counterweight 3 and the track. Thereby, the friction between the counterweight 3 and the track can be reduced, making the movement of the counterweight 3 more flexible, smooth and efficient. In addition, the roller 6 can also protect the track from wear to a certain extent, thereby improving the working efficiency and service life of the device.

[0075] like Figure 3 As shown, in this embodiment, the counterweight moving device also includes a reinforcement member 7 in a foldable structure, and the reinforcement member 7 can be a chain, a rope or a connecting rod mechanism, etc. One end of the reinforcement member 7 is connected to the connecting frame 10, and the other end of the reinforcement member 7 is connected to the second bracket 4. When the second bracket 4 is in a retracted state, the reinforcement member 7 is in a bent state, thereby ensuring that the reinforcement member 7 can be easily folded and stored, does not interfere with the second bracket 4, adapts to a compact structural form, and does not affect the movement of the second bracket 4. When the second bracket 4 is in an unfolded state, the reinforcement member 7 is in an extended state, thereby being able to provide certain support and reinforcement for the second bracket 4, improve the rigidity and strength of the second bracket 4, reliably carry the counterweight 3, and enhance the stability and safety of the device.

[0076] Preferably, in this embodiment, the counterweight moving device further includes a limiting mechanism, which is used to limit and fix the second bracket 4 in the retracted state to prevent the second bracket 4 from tipping over. Specifically, the limiting mechanism includes a matching limiting member 8 and a limiting hole 9, and the limiting member 8 can be a pin. The connecting frame 10 and the second bracket 4 are respectively provided with relative limiting holes 9. When the second bracket 4 is in the retracted state, the limiting holes 9 on the connecting frame 10 and the second bracket 4 are aligned, and the limiting member 8 is inserted into the limiting hole 9 to limit and fix the second bracket 4 and the connecting frame 10. Thereby, it plays a fixing and limiting role when the second bracket 4 is retracted. By providing a stable fixing point, the limiting mechanism can prevent the second bracket 4 from tipping over when not subjected to external force, thereby ensuring the safety and stability of the entire device. In addition, it also makes the device more compact in structure in the retracted state and convenient for road transportation.

[0077] Furthermore, in the embodiment of the present invention, the counterweight moving device further includes an annular rib 801 and a stopper 802. Figure 4 As shown, the annular rib 801 is arranged at one end of the limiting member 8, and the annular rib 801 and the limiting member 8 can be integrally formed. The stopper 802 is arranged at the other end of the limiting member 8, and the stopper 802 is detachably connected to the limiting member 8. Specifically, a through hole is provided at the other end of the limiting member 8, and the stopper 802 can be a cotter pin, which is inserted into the through hole. When the second bracket 4 is in the retracted state, the annular rib 801 and the stopper 802 cooperate with each other to prevent the limiting member 8 from falling off from the limiting hole 9, thereby further ensuring that the second bracket 4 is reliably fixed.

[0078] According to an embodiment of the present invention, on the other hand, a working machine is also provided. It can be understood that the working machine includes but is not limited to a crane, an excavator, a rotary drilling rig, etc. Specifically, taking a crane as an example to illustrate this embodiment, the working machine includes a counterweight moving device as in the above-mentioned embodiments. In this way, the second bracket 4 can be rotated and switched between the retracted state and the unfolded state relative to the first bracket 1, so that when the second bracket 4 is retracted, the length of the whole vehicle is shortened to meet the road driving requirements, ensure that the equipment can be driven on the road normally, and reduce the turning radius of the equipment to reduce the safety hazards during driving; when the second bracket 4 is unfolded, the driving member 5 can drive the counterweight 3 to slide on the first bracket 1 and the second bracket 4, and adjust the distance between the center of gravity of the counterweight 3 and the rotation center of the turntable 2, so as to greatly improve the lifting performance of the equipment without increasing the weight of the counterweight, improve the stability of the whole machine, and improve the competitiveness of the product. The derivation process of this beneficial effect is roughly similar to the derivation process of the beneficial effect of the above-mentioned counterweight moving device, so it will not be repeated here.

[0079] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A counterweight moving device, characterized in that: include: A first bracket (1) used for connecting to a turntable (2); A counterweight (3) connected to the first bracket (1) and adapted to slide on the first bracket (1); A second bracket (4) is rotatably connected to a side of the first bracket (1) away from the turntable (2), and the second bracket (4) is switchable between a retracted state and an unfolded state; wherein, in the unfolded state, the second bracket (4) is arranged flush with the first bracket (1), and the counterweight (3) is able to slide from the first bracket (1) to the second bracket (4), and is suitable for sliding on the second bracket (4); A driving member (5) has one end connected to the counterweight (3) and the other end connected to the turntable (2), and the driving member (5) is used to drive the counterweight (3) to move in a direction close to the turntable (2) or away from the turntable (2).

2. The counterweight moving device according to claim 1, characterized in that: The first bracket (1) is provided with a first track (101), and the counterweight (3) is slidably connected to the first track (101); The second bracket (4) is provided with a second track (401), and the counterweight (3) is slidably connected to the second track (401); When the second bracket (4) is in the unfolded state, the second track (401) is aligned with and flush with the first track (101).

3. The counterweight moving device according to claim 2, characterized in that: The number of the first rails (101) is at least two, and the plurality of first rails (101) are distributed at intervals along the width direction of the first bracket (1), and the second rails (401) correspond to the first rails (101) one by one.

4. The counterweight moving device according to claim 2, characterized in that: Also includes: The roller (6) is rotatably connected to the counterweight (3), and when the counterweight (3) moves, the roller (6) is suitable for rolling on the first track (101) and the second track (401).

5. The counterweight moving device according to any one of claims 1 to 4, characterized in that: Also includes: A connecting frame (10) connected to the turntable (2), the first bracket (1) connected to the bottom (1001) of the connecting frame (10), and in the retracted state, the second bracket (4) abuts against the side (1002) of the connecting frame (10); A reinforcing member (7) having a foldable structure has one end connected to the connecting frame (10) and the other end connected to the second bracket (4); in the retracted state, the reinforcing member (7) is in a bent state; in the unfolded state, the reinforcing member (7) is in an extended state.

6. The counterweight moving device according to claim 5, characterized in that: Also includes: A limiting mechanism is used to limit and fix the second bracket (4) in the retracted state to prevent the second bracket (4) from tipping over.

7. The counterweight moving device according to claim 6, characterized in that: The limiting mechanism comprises: The connecting frame (10) and the second bracket (4) are respectively provided with corresponding limiting holes (9). In the retracted state, the limiting member (8) is inserted into the limiting hole (9) to limit and fix the second bracket (4) and the connecting frame (10).

8. The counterweight moving device according to claim 7, characterized in that: Also includes: An annular rib (801) is arranged at one end of the limiting member (8); A stopper (802) is arranged at the other end of the limiting member (8), and the stopper (802) is detachably connected to the limiting member (8); The annular retaining edge (801) and the retaining member (802) are suitable for preventing the limiting member (8) from falling out of the limiting hole (9) in the retracted state.

9. The counterweight moving device according to any one of claims 1 to 4, characterized in that: The driving member (5) is an oil cylinder or an air cylinder.

10. A working machine, characterized in that: The device comprises a counterweight moving device as claimed in any one of claims 1 to 9.

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