Counterweight lifting mechanism and hoisting equipment

Abstract

The utility model discloses a counterweight lifting mechanism and hoisting equipment, and relates to the technical field of cranes, the counterweight lifting mechanism comprises a mounting turntable, a counterweight bracket and a driving structure, the mounting turntable is provided with a mounting side wall; the counterweight support is provided with a first end and a second end which are opposite, the first end is rotationally arranged on the mounting side wall along the axis in the horizontal direction, the second end can be at least higher than the first end in the rotating stroke of the first end, and the second end is provided with a counterweight part; and the driving structure is arranged between the counterweight bracket and the mounting side wall so as to drive the counterweight bracket to move. According to the technical scheme provided by the utility model, the counterweight bracket is arranged on the mounting side wall of the mounting rotary table, so that a larger swing range is provided for the counterweight bracket, the counterweight part can be lifted to a higher position and lowered to a lower position, and the position of the gravity center can be lowered to a greater extent.

Description

Technical Field

[0001] The utility model relates to the technical field of cranes, in particular to a counterweight lifting mechanism and a lifting device. Background Art

[0002] The counterweight frame of an existing crane is usually arranged below the winch box, and the counterweight frame is pushed to swing by a hydraulic cylinder to achieve the displacement of the center of gravity. However, due to the obstruction of the winch box, the swing range of the counterweight frame is limited, making it difficult to lift and lower the center of gravity to the maximum extent. Utility Model Content

[0003] The main purpose of the utility model is to provide a counterweight lifting mechanism and a lifting device, aiming to improve the problem that the swing amplitude of the counterweight frame of the existing crane is small and it is difficult to lift and lower the center of gravity to the maximum extent.

[0004] To achieve the above purpose, the counterweight lifting mechanism proposed by the utility model includes:

[0005] An installation turntable having an installation side wall;

[0006] A counterweight bracket, having a first end and a second end opposite to each other, wherein the first end is rotatably arranged on the mounting side wall along an axis in a first direction so that the second end can swing, and the second end can be at least higher than the first end in its swing stroke, and the second end is provided with a counterweight portion; and

[0007] The telescopic driving structure is arranged between the counterweight bracket and the mounting side wall to drive the counterweight bracket to move.

[0008] The technical solution of the utility model is to connect the counterweight bracket to the mounting side wall of the mounting turntable. Since the flipping stroke of the second end of the counterweight bracket is only limited by the mounting side wall, its swing amplitude is large, so that the center of gravity of the counterweight bracket and the counterweight part can be lowered to a lower position. At the same time, its second end can be lifted to be higher than the first end, and the counterweight bracket can also lift the counterweight part to the maximum extent. This arrangement allows the counterweight part to avoid the obstacle by lifting it if it is blocked by an external obstacle in the horizontal direction during the rotation of the mounting turntable.

[0009] In some embodiments, the counterweight bracket includes two counterweight connecting arms that are opposite to each other in the second direction and have the same length, and two ends of the counterweight connecting arms are rotatably connected to the counterweight portion and the mounting side wall respectively;

[0010] The first end and the second end of the counterweight bracket are respectively formed at two ends of the counterweight connecting arm;

[0011] The telescopic driving structure drives at least one of the counterweight connecting arms to move.

[0012] Among them, during the flipping process of the counterweight bracket, since the relative positions of the first ends of the two counterweight connecting arms are fixed, the relative positions of the second ends of the two counterweight connecting arms are also fixed, which can ensure that the counterweight part moves in parallel without tilting, ensuring that the counterweight bracket can stably lift the counterweight.

[0013] In some embodiments, the mounting turntable has a rotating mounting end;

[0014] The two counterweight connecting arms include a counterweight cantilever and a matching support arm, wherein the counterweight cantilever is arranged in the second direction relative to the matching support arm away from the rotating mounting end;

[0015] The telescopic driving structure is configured to drive the counterweight cantilever to move.

[0016] Among them, the counterweight cantilever is set higher than the matching arm in the second direction, and it serves as the main counterweight bearing arm. It can be understood that at this time, the center of gravity of the counterweight part is at the bottom of the counterweight cantilever, and the force exerted by the counterweight cantilever on it is a lifting force, which can stably maintain the position of the counterweight part, and the matching arm is an auxiliary adjustment structure, which is only used to maintain the translational state of the counterweight part, and can simplify the structural setting of the matching arm.

[0017] In some embodiments, the counterweight bracket and the telescopic drive structure correspond one-to-one to form a connection drive group, and multiple groups of the connection drive groups are arranged along the first direction.

[0018] Among them, by setting up multiple groups of connecting drive groups to drive the counterweight part to adjust the height, the driving pressure of a single group of connecting drive groups can be reduced. By ensuring that the center of gravity of the counterweight part is between multiple connecting drive groups, the structural stability of the counterweight lifting mechanism is ensured.

[0019] In some embodiments, the plurality of telescopic drive structures are configured to perform synchronous telescopic movements.

[0020] Among them, setting multiple telescopic drive structures to perform synchronous telescopic activities can ensure that the flipping activity of the counterweight bracket is carried out smoothly, thereby ensuring the stable operation of the counterweight lifting mechanism.

[0021] In some embodiments, the telescopic drive structure includes a cylinder;

[0022] A synchronization valve is connected between the plurality of oil cylinders.

[0023] Among them, when the telescopic driving structure is set as an oil cylinder, multiple oil cylinders can be connected to a synchronization valve. The synchronization valve can detect the oil pressure of multiple oil cylinders by itself. When the oil pressure of some of the oil cylinders is too high or too low, the synchronization valve can automatically open to adjust the oil pressure in multiple oil cylinders and ensure synchronous output of multiple oil cylinders.

[0024] In some embodiments, a limiting portion is provided at the bottom of the counterweight portion; and / or,

[0025] The connection point between the telescopic drive structure and the counterweight support is arranged close to the second end.

[0026] Among them, a limiting part is arranged at the bottom of the counterweight part. When the counterweight part descends in height, the limiting part can cooperate with the external matching part to limit the position of the counterweight part, thereby preventing the center of gravity of the counterweight part from shifting when the counterweight lifting mechanism is not working, thereby ensuring the structural stability of the counterweight lifting mechanism; the connection point between the telescopic drive structure and the counterweight bracket is arranged close to the second end, so that the driving force of the telescopic drive structure acts more directly, thereby reducing the driving force requirement for the telescopic drive structure to push the counterweight part to move, reducing the use cost of the telescopic drive structure, and allowing a lighter telescopic drive structure to be selected.

[0027] The utility model also provides a lifting device, which comprises a counterweight lifting mechanism as described in any one of the above embodiments.

[0028] In some embodiments, the lifting equipment includes a traveling body, and the mounting turntable is rotatably disposed on the traveling body.

[0029] Among them, the lifting equipment in this technical solution can move its position by itself because of the setting of the traveling body, so as to go to different lifting scenes.

[0030] In some embodiments, the bottom of the counterweight portion is arranged at a limiting portion, and a matching portion is arranged at a corresponding position of the traveling body. Within the swinging stroke of the second end of the counterweight bracket, the limiting portion can be adaptively connected with the matching portion.

[0031] Among them, by respectively arranging a limiting part and a matching part on the counterweight part and the traveling body, the position of the counterweight part at the second end of the counterweight bracket when it is in a low position can be limited to prevent the center of gravity of the counterweight part from shifting relative to the traveling body, thereby ensuring a safe and stable driving process. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0033] Figure 1 A side structural schematic diagram of an embodiment of a counterweight lifting mechanism (the counterweight part is in a lifted state) provided by the utility model;

[0034] Figure 2 It is a side structural schematic diagram of an embodiment of the counterweight lifting mechanism (the counterweight part is in a descending state) provided by the utility model.

[0035] Description of Figure Numbers:

[0036] 100. Counterweight lifting mechanism; 1. Install turntable; 11. Install side wall; 12. Rotate mounting end; 2. Counterweight bracket; 2a. First end; 2b. Second end; 21. Counterweight connecting arm; 211. Counterweight cantilever; 212. Matching support arm; 3. Telescopic drive structure; 31. Oil cylinder; 4. Counterweight part.

[0037] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0041] The counterweight frame of an existing crane is usually arranged below the winch box, and the counterweight frame is pushed to swing by a hydraulic cylinder to achieve the displacement of the center of gravity. However, due to the obstruction of the winch box, the swing range of the counterweight frame is limited, making it difficult to lift and lower the center of gravity to the maximum extent.

[0042] Analysis of the above problems shows that the obstruction of the winch box makes the counterweight frame only swing to a horizontal position at most, and cannot continue to swing higher. The source of the counterweight frame's swinging force is usually the drive cylinder, which is limited by the telescopic drive position of the drive cylinder (the drive cylinder usually drives the middle part of the counterweight frame to move). The counterweight frame cannot droop too much (the counterweight frame is designed to droop downward due to its large size. When it swings to a horizontal position, it is affected by the long force arm. The drive cylinder needs to be able to provide a very large support force, which makes it difficult to select the drive cylinder), thus limiting the lowering of the center of gravity of the counterweight frame. These problems all arise from the limitations of the counterweight frame's installation position, so you can consider changing the installation position of the counterweight frame to overcome the above problems.

[0043] In view of this, the utility model proposes a counterweight lifting mechanism and lifting equipment, aiming to improve the problem that the swing amplitude of the counterweight frame of the existing crane is small and it is difficult to lift and lower the center of gravity to the maximum extent. Figure 1 A side structural schematic diagram of an embodiment of a counterweight lifting mechanism (the counterweight part is in a lifted state) provided by the utility model; Figure 2 It is a side structural schematic diagram of an embodiment of the counterweight lifting mechanism (the counterweight part is in a descending state) provided by the utility model.

[0044] See also Figure 1 and Figure 2 In one embodiment of the utility model, the counterweight lifting mechanism 100 includes a mounting turntable 1, a counterweight bracket 2 and a telescopic driving structure 3. The mounting turntable 1 has a mounting side wall 11; the counterweight bracket 2 has a first end 2a and a second end 2b opposite to each other, and the first end 2a is rotatably arranged on the mounting side wall 11 along an axis in a first direction so that the second end 2b can swing and move, and the second end 2b can be at least higher than the first end 2a in its swing stroke, and the second end 2b is provided with a counterweight part 4; the telescopic driving structure 3 is arranged between the counterweight bracket 2 and the mounting side wall 11 to drive the counterweight bracket 2 to move.

[0045] It should be noted that the mounting turntable 1 serves as the mounting base of the counterweight bracket 2, and it also has the function of being rotatably mounted to the lifting equipment. Generally speaking, the lifting arm of the lifting equipment is also mounted on the mounting turntable 1; the mounting side wall 11 of the mounting turntable 1 belongs to the side wall extending along the gravity direction after the mounting turntable 1 is correctly mounted to the lifting equipment; the function of the counterweight bracket 2 in this embodiment is to connect the counterweight part 4 and the mounting side wall 11, and to rotatably mount the first end 2a and the mounting side wall 11 so that the second end 2b can swing. The rotation of the first end 2a along the axis in the first direction can be understood as that, after the mounting turntable 1 is correctly mounted to the lifting equipment, the rotation axis of the first end 2a is oriented to the horizontal direction, combined with Figure 1 It can be understood that the first direction is a direction perpendicular to the accompanying drawing; the specific structure of the counterweight bracket 2 has various forms. For example, in one case, the counterweight bracket 2 includes a single cantilever connecting the counterweight part 4 and the mounting side wall 11, which is not limited in this embodiment; there are various ways to connect the counterweight part 4 to the counterweight bracket 2, which can be a fixed connection or a rotating connection, which is not limited in this embodiment; the telescopic drive structure 3 usually has two ends, and the distance between the two ends is adjustable. The telescopic drive structure 3 is arranged between the counterweight bracket 2 and the mounting side wall 11, which means that the two ends of the telescopic drive structure 3 are respectively connected to the corresponding positions of the mounting side wall 11 and the counterweight bracket 2. The telescopic drive structure 3 can drive the counterweight bracket 2 to move by "stretching" or "pulling", and this embodiment does not limit the specific form of the telescopic drive structure.

[0046] The technical solution of the utility model is to connect the counterweight bracket 2 to the mounting side wall 11 of the mounting turntable 1. Since the flipping stroke of the second end 2b of the counterweight bracket 2 is only limited by the mounting side wall 11, its swing amplitude is large, so that the center of gravity of the counterweight bracket 2 and the counterweight part 4 can be lowered to a lower position. At the same time, its second end 2b can be lifted to be higher than the first end 2a, and the counterweight bracket 2 can also lift the counterweight part 4 to the maximum extent. This arrangement enables the counterweight part 4 to avoid the obstacle by lifting it during the rotation of the mounting turntable 1.

[0047] Regarding the specific structure of the counterweight bracket 2, in some embodiments, the counterweight bracket 2 includes two counterweight connecting arms 21 that are opposite to each other and have the same length in the second direction, and the two ends of the counterweight connecting arms 21 are respectively rotatably connected to the counterweight part 4 and the mounting side wall 11; the first end 2a and the second end 2b of the counterweight bracket 2 are respectively formed at the two ends of the counterweight connecting arm 21; the telescopic drive structure 3 drives at least one of the counterweight connecting arms 21 to move.

[0048] It should be noted that the "second direction" should generally be understood as a direction different from the "first direction", which can be perpendicular to the first direction or set at an angle to the first direction, and this is not limited in the present embodiment; the telescopic driving structure 3 drives at least one of the counterweight connecting arms 21 to move, which means that the telescopic driving structure 3 can drive any one of the counterweight connecting arms 21 to move, or can drive both counterweight connecting arms 21 to move at the same time; the two ends of the counterweight connecting arm 21 are respectively connected to the counterweight part 4 and the mounting side wall 11, which means that the counterweight connecting part has a longer length dimension in the relative direction of the counterweight part 4 and the mounting side wall 11, and the two counterweight connecting arms 21 are of the same length, which generally refers to that The spacing between the first end 2a and the second end 2b is consistent (the counterweight connecting arm 21 can be set to a long straight shape or a special shape), and the two counterweight connecting arms 21 are opposite to each other in the second direction, which means that the four connection points formed between the two counterweight connecting arms 21 and the counterweight part 4 and the mounting side wall 11 together constitute a plurality of vertices similar to a parallelogram. Based on the characteristics of the parallelogram, it can be known that during the flipping process of the counterweight bracket 2, since the relative positions of the first ends 2a of the two counterweight connecting arms 21 are fixed, the relative positions of the second ends 2b of the two counterweight connecting arms 21 are also fixed, which can ensure that the counterweight part 4 moves in parallel without tilting, thereby ensuring that the counterweight bracket 2 stably lifts the counterweight.

[0049] In a specific embodiment, the second direction is a gravity direction perpendicular to the first direction.

[0050] Further, in some embodiments, the mounting turntable 1 has a rotating mounting end 12; the two counterweight connecting arms 21 include a counterweight cantilever 211 and a matching support arm 212, and the counterweight cantilever 211 is arranged away from the rotating mounting end 12 relative to the matching support arm 212 in the second direction; the telescopic driving structure 3 is arranged to drive the counterweight cantilever 211 to move.

[0051] It should be noted that the rotating mounting end 12 usually includes one end of the mounting turntable 1 installed to the external structure, that is, the bottom end of the mounting turntable 1, and the counterweight cantilever 211 is arranged away from the rotating mounting end 12 relative to the matching support arm 212 in the second direction, which means that the counterweight cantilever 211 is arranged higher than the matching support arm 212 in the second direction.

[0052] According to the above technical solution, the counterweight cantilever 211 is arranged higher than the matching arm 212 in the second direction. As the main counterweight bearing arm, it can be understood that at this time, the center of gravity of the counterweight part 4 is at the bottom of the counterweight cantilever 211, and the force exerted by the counterweight cantilever 211 on it is a lifting force, which can stably maintain the position of the counterweight part 4, while the matching arm 212 is an auxiliary adjustment structure, which is only used to maintain the translational state of the counterweight part 4, and can simplify the structural setting of the matching arm 212. At the same time, due to the simplification of the structure of the matching arm 212, it has a certain giving way effect on the counterweight cantilever 211, that is, the counterweight cantilever 211 can be arranged close to the installation side wall 11, and the center of gravity of the counterweight part 4 can be placed lower.

[0053] Regarding the setting position of the telescopic driving structure 3, specifically, in some embodiments, the telescopic driving structure 3 is set between the counterweight cantilever 211 and the matching support arm 212. Such a setting can at least save the setting space occupied by the telescopic driving structure 3.

[0054] In some embodiments, the counterweight bracket 2 and the telescopic driving structure 3 correspond one to one to form a connection driving group, and multiple groups of the connection driving groups are arranged along the first direction.

[0055] It should be noted that, in this embodiment, since multiple connection drive groups are arranged in the first direction, it can be understood that the counterweight part 4 has a larger size in the first direction to facilitate the connection with the counterweight brackets 2 in multiple connection drive groups.

[0056] According to the above technical solution, by setting up multiple connection drive groups to drive the counterweight part 4 to adjust the height, the driving pressure of a single connection drive group can be reduced. By ensuring that the center of gravity of the counterweight part 4 is between multiple connection drive groups, the structural stability of the counterweight lifting mechanism 100 is ensured.

[0057] Specifically, two connection drive groups are provided, and are respectively provided corresponding to the two ends of the counterweight part 4 along the first direction.

[0058] The above embodiment defines that there are multiple groups of connection drive groups, which means that there are multiple telescopic drive structures 3. The inconsistent driving pace of the multiple telescopic drive structures 3 will cause the entire counterweight lifting mechanism 100 to have a large internal stress, which may cause the flipping of the counterweight bracket 2 to be stuck and not smooth. In severe cases, it may also cause the connection between the structures to fail. In view of this, in some embodiments, the multiple telescopic drive structures 3 are set to synchronize telescopic activities. Among them, setting the multiple telescopic drive structures 3 to synchronize telescopic activities can ensure that the flipping activity of the counterweight bracket 2 is carried out smoothly, thereby ensuring the stable operation of the counterweight lifting mechanism 100.

[0059] Specifically, in some embodiments, the telescopic drive structure 3 includes an oil cylinder 31; a synchronization valve is connected between the multiple oil cylinders 31. It should be noted that the synchronization valve is connected to the multiple oil cylinders 31 and can be opened to synchronize the oil pressure in the multiple oil cylinders 31. The specific structure of the synchronization valve is not described in detail in this embodiment.

[0060] According to the above technical solution, when the telescopic driving structure 3 is set as the oil cylinder 31, the multiple oil cylinders 31 can be connected to the synchronization valve. The synchronization valve can detect the oil pressure of the multiple oil cylinders 31 by itself. When the oil pressure of some of the oil cylinders 31 is too high or too low, the synchronization valve can automatically open to adjust the oil pressure in the multiple oil cylinders 31 to ensure the synchronous output of the multiple oil cylinders 31.

[0061] In other embodiments, the telescopic driving structure 3 includes a push rod motor, and multiple push rod motors are connected to the same control board, and synchronous operation is achieved by sending control signals through the control board.

[0062] The telescopic driving structure 3 introduced above includes a cylinder 31 or a push rod motor, both of which belong to the "expanding" driving mode. The telescopic driving structure 3 can also adopt a "pulling" driving mode. For example, the telescopic driving structure 3 includes a winch structure. The winch body of the winch structure is arranged on the installation side wall 11. The winch rope of the winch structure is connected to the counterweight bracket 2, and the second end 2b of the counterweight bracket 2 is flipped and lifted by pulling.

[0063] In some embodiments, a limiting portion is provided at the bottom of the counterweight portion 4. It should be noted that the function of the limiting portion is to be matched and connected with the external matching portion, so as to limit the position of the counterweight portion 4. There are many structural types of the limiting portion, such as a convex block or a groove, which is not limited in this embodiment; wherein, a limiting portion is provided at the bottom of the counterweight portion 4, and when the counterweight portion 4 is lowered, the limiting portion can cooperate with the external matching portion, so as to limit the position of the counterweight portion 4, prevent the center of gravity of the counterweight portion 4 from shifting when the counterweight lifting mechanism 100 is not working, and ensure the structural stability of the counterweight lifting mechanism 100.

[0064] In other embodiments, the connection point between the telescopic drive structure 3 and the counterweight bracket 2 is arranged close to the second end 2b. According to the analysis of mechanical principles, since the counterweight part 4 is arranged at the second end 2b of the counterweight bracket 2, the connection point between the telescopic drive structure 3 and the counterweight bracket 2 is arranged close to the second end 2b, so that the driving force of the telescopic drive structure 3 acts more directly, thereby reducing the driving force required for the telescopic drive structure 3 to push the counterweight part 4 to move, reducing the use cost of the telescopic drive structure 3, and a lighter telescopic drive structure 3 can be selected.

[0065] It should be noted that the above two parallel technical features "a limited position portion is provided at the bottom of the counterweight portion 4" and "the connection point between the telescopic drive structure 3 and the counterweight bracket 2 is provided close to the second end 2b" can be set selectively or simultaneously. Obviously, setting them simultaneously has more beneficial effects.

[0066] The utility model also proposes a lifting device, which includes a counterweight lifting mechanism 100. The specific structure of the counterweight lifting mechanism 100 refers to the above embodiment. Since the lifting device adopts all the technical solutions of all the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here. There are many specific types of the lifting device, but it should be noted that the lifting device belongs to the device that requires the counterweight lifting mechanism 100 to adjust the center of gravity during the lifting process.

[0067] Specifically, in some embodiments, the lifting equipment includes a traveling body, and the mounting turntable 1 is rotatably arranged on the traveling body. The traveling body refers to a device that can be moved on the ground, such as a trailer or a trailer. The lifting equipment in this embodiment can automatically move its position because of the setting of the traveling body, so as to go to different lifting scenes.

[0068] The above-mentioned embodiments have defined the lifting equipment as having the function of self-movement. Therefore, in the process of driving and moving, if the counterweight part 4 with a larger mass is not limited, it is easy to cause the overall center of gravity of the lifting equipment to be unstable, and there is a risk of rollover. In view of this, in some embodiments, the bottom of the counterweight part 4 is arranged at the limiting part, and a matching part is arranged at the corresponding position of the driving body. Within the swinging stroke of the second end 2b of the counterweight bracket 2, the limiting part can be adapted and connected with the matching part.

[0069] It should be noted that the limiting part and the matching part are components that can cooperate with each other. After the two are matched, they can produce a movable limiting effect in a certain direction, wherein the limiting part and the matching part can be a protrusion and a groove, or a pin shaft and a pin hole, and this embodiment does not limit this; it is easy to understand that within the swinging stroke of the second end 2b of the counterweight bracket 2, the limiting part can be adaptively connected with the matching part, which means that when the second end 2b is in the lowest position, the limiting part on the counterweight part 4 can be compatible with the matching part of the traveling body.

[0070] According to the above technical solution, by respectively arranging a limiting portion and a matching portion on the counterweight part 4 and the traveling body, the position of the counterweight part 4 at the second end 2b of the counterweight bracket 2 when in a low position can be limited to prevent the center of gravity of the counterweight part 4 from shifting relative to the traveling body, thereby ensuring a safe and stable driving process.

[0071] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A counterweight lifting mechanism, characterized in that: include: The turntable (1) is installed with a side wall (11), A counterweight bracket (2) having a first end (2a) and a second end (2b) opposite to each other, wherein the first end (2a) is rotatably arranged on the mounting side wall (11) along an axis located in a first direction so that the second end (2b) can swing, and the second end (2b) can be at least higher than the first end (2a) in its swing stroke, and the second end (2b) is provided with a counterweight portion (4); and A telescopic driving structure (3) is arranged between the counterweight bracket (2) and the mounting side wall (11) to drive the counterweight bracket (2) to move.

2. The counterweight lifting mechanism according to claim 1, characterized in that: The counterweight bracket (2) comprises two counterweight connecting arms (21) which are opposite to each other in the second direction and have the same length, and two ends of the counterweight connecting arms (21) are rotatably connected to the counterweight portion (4) and the mounting side wall (11) respectively; The first end (2a) and the second end (2b) of the counterweight bracket (2) are respectively formed at two ends of the counterweight connecting arm (21); The telescopic driving structure (3) drives at least one of the counterweight connecting arms (21) to move.

3. The counterweight lifting mechanism according to claim 2, characterized in that: The mounting turntable (1) has a rotating mounting end (12); The two counterweight connecting arms (21) comprise a counterweight cantilever arm (211) and a matching support arm (212); the counterweight cantilever arm (211) is arranged in a second direction relative to the matching support arm (212) and away from the rotating mounting end (12); The telescopic driving structure (3) is configured to drive the counterweight cantilever (211) to move.

4. The counterweight lifting mechanism according to claim 1, characterized in that: The counterweight bracket (2) and the telescopic drive structure (3) correspond one to one to form a connection drive group, and a plurality of connection drive groups are arranged along the first direction.

5. The counterweight lifting mechanism according to claim 4, characterized in that: The two telescopic drive structures (3) are arranged to perform synchronous telescopic activities.

6. The counterweight lifting mechanism according to claim 5, characterized in that: The telescopic driving structure (3) comprises an oil cylinder (31); A synchronization valve is connected between the plurality of oil cylinders (31).

7. The counterweight lifting mechanism according to claim 1, characterized in that: The bottom of the counterweight part (4) is provided with a limiting part and / or, The connection point between the telescopic drive structure (3) and the counterweight bracket (2) is arranged close to the second end.

8. A lifting device, characterized in that: It comprises a counterweight lifting mechanism as claimed in any one of claims 1 to 7.

9. The lifting device according to claim 8, characterized in that The lifting equipment comprises a travelling body, and the mounting turntable (1) is rotatably arranged on the travelling body.

10. The lifting device according to claim 9, characterized in that The bottom of the counterweight part (4) is arranged at a limiting part, and a matching part is arranged at a corresponding position of the traveling body. Within the swinging stroke of the second end (2b) of the counterweight bracket (2), the limiting part can be adaptively connected with the matching part.

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