Movable counterweight displacement lifting structure for crane

Abstract

The utility model belongs to the technical field of crane counterweights, and particularly relates to a movable counterweight displacement lifting structure for a crane, which adopts the following scheme that the movable counterweight displacement lifting structure comprises a base, the balancing weight is connected to the top of the base in a sliding manner; the fixing frame is fixedly mounted at the top of the base; the fixing mechanism is matched with the fixing frame and the unlocking mechanism respectively; the moving mechanism comprises a motor, a threaded rod and a threaded sleeve; the electric push rod is arranged on the fixing frame, the positioning disc and the threaded rod can be unlocked by starting the electric push rod on the fixing frame, then the motor is started, the motor drives the threaded rod to rotate, the threaded rod can drive the threaded sleeve and the balancing weight to move, and the position of the balancing weight can be freely adjusted. And the use requirements of the crane on long arm length and long lifting working conditions are met, and the performance of the crane is fully exerted.

Description

Technical Field

[0001] This utility model relates to the field of crane counterweight technology, and in particular to a movable counterweight displacement and lifting structure for cranes. Background Technology

[0002] The movable counterweight is an important component of wheeled cranes. Installed at the rear of the turntable during crane operation, it balances the crane's lifting torque and prevents tipping during loading. When relocating the crane, the movable counterweight is typically removed from the turntable and transported by truck. Generally, the larger the crane's tonnage, the more movable counterweights it carries; typically, a 100-ton crane is equipped with around 50 tons of movable counterweight. The movable counterweight is mounted on the crane's turntable, and its slewing radius must be considered during design to prevent interference with other components on the chassis during turntable rotation. Therefore, the distance between the movable counterweight and the center of rotation is constant. Achieving a greater balancing torque primarily relies on increasing the weight of the movable counterweight.

[0003] In the prior art, the movable counterweight is limited by the design space, which restricts the total weight of the movable counterweight and cannot meet the usage requirements of cranes with long booms and long lifting distances, thus failing to fully utilize the performance of the crane. Therefore, this utility model proposes a movable counterweight displacement lifting structure for cranes to solve the above problems. Utility Model Content

[0004] The purpose of this utility model is to solve the problem that the design space of the movable counterweight is limited when it is used, which results in a limited total weight of the movable counterweight and cannot meet the usage requirements of long boom and long lifting distance of cranes, thus failing to give full play to the performance shortcomings of cranes. Therefore, a movable counterweight displacement lifting structure for cranes is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A movable counterweight displacement lifting structure for a crane, comprising:

[0007] Base;

[0008] A counterweight, which is slidably connected to the top of the base;

[0009] A mounting bracket, which is fixedly installed on the top of the base;

[0010] A fixing mechanism and an unlocking mechanism, wherein the fixing mechanism cooperates with the fixing frame and the unlocking mechanism, respectively;

[0011] A moving mechanism, comprising: a motor, a threaded rod, and a threaded sleeve;

[0012] The motor is fixedly mounted on the fixed frame, the motor output shaft passes through the fixed frame, the threaded rod is fixedly connected to the motor output shaft, the outer side of the threaded rod is threadedly connected to the inner wall of the threaded sleeve, and the threaded sleeve is fixedly connected to the counterweight.

[0013] As a preferred embodiment of this utility model, the fixing mechanism includes: a positioning plate and a positioning frame;

[0014] The positioning plate is fixedly sleeved on the outside of the threaded rod, and the positioning frame is slidably connected to the fixed frame, with the positioning frame cooperating with the positioning plate.

[0015] As a preferred embodiment of this utility model, the unlocking mechanism includes: a driving block, a pushing rod, a rotating rod, a pressing block, and an electric push rod;

[0016] The drive block is fixedly installed on the positioning frame. The drive block is rotatably connected to the push rod. The push rod is rotatably connected to the rotating rod. The rotating rod is rotatably connected to the fixed frame. The electric push rod is fixedly connected to the fixed frame. The output shaft of the electric push rod is fixedly connected to the pressing block. The bottom of the pressing block slides in contact with the top of the rotating rod and the push rod, respectively.

[0017] As a preferred embodiment of this utility model, the outer side of the positioning disk is provided with a plurality of positioning grooves arranged at equal intervals, and a positioning block is fixedly installed on the rear side of the positioning frame. The outer side of the positioning block can be detachably engaged with the inner wall of the positioning groove.

[0018] As a preferred embodiment of this utility model, two symmetrically arranged springs are fixedly installed on the left side of the positioning frame. Each spring has a fixing block fixedly installed on its left end, and the fixing block is fixedly connected to the fixing frame.

[0019] As a preferred embodiment of this utility model, mounting brackets are fixedly installed on both the left and right sides of the base.

[0020] Beneficial effects:

[0021] 1. After the positioning frame and the positioning plate are engaged, the positioning frame can connect the positioning plate to the fixed frame to block the rotation of the positioning plate on the fixed frame. The positioning plate is fixedly connected to the threaded rod, which can realize the positioning of the positioning plate and the threaded rod to prevent external factors from affecting the position of the counterweight and to prevent vibration and accidental contact from affecting the rotation of the threaded rod.

[0022] 2. After the electric push rod is started, the electric push rod presses down on the push block, which causes the push block to press down and rotate the rotating rod and the push rod, so that the push rod can push the positioning frame to disengage from the positioning plate, thereby unlocking the positioning plate and the threaded rod;

[0023] In this invention, by activating the electric push rod on the fixed frame, the positioning plate and the threaded rod can be unlocked. Then, the motor is started, and the motor drives the threaded rod to rotate. The threaded rod can then move the threaded sleeve and the counterweight, allowing the position of the counterweight to be freely adjusted to meet the usage requirements of long boom and long lifting distances of the crane, thus fully utilizing the performance of the crane. Attached Figure Description

[0024] Figure 1 This is a three-dimensional front view of the present invention;

[0025] Figure 2 This is a top-view three-dimensional view of the present invention;

[0026] Figure 3 This is a rear-view three-dimensional view of the present invention;

[0027] Figure 4 This is a magnified 3D front view of the auxiliary mechanism of this utility model.

[0028] In the diagram: 1. Base; 2. Mounting bracket; 3. Fixing bracket; 4. Motor; 5. Threaded rod; 6. Threaded sleeve; 7. Counterweight; 8. Positioning plate; 9. Positioning frame; 10. Spring; 11. Fixing block; 12. Driving block; 13. Push rod; 14. Rotating rod; 15. Pressing block; 16. Electric push rod. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] Example

[0031] Reference Figures 1-4 A movable counterweight displacement lifting structure for a crane, comprising:

[0032] Base 1;

[0033] Counterweight 7 is slidably connected to the top of base 1;

[0034] Fixture 3 is fixedly installed on the top of base 1;

[0035] The fixing mechanism and the unlocking mechanism are respectively matched with the fixing frame 3 and the unlocking mechanism;

[0036] The moving mechanism includes: motor 4, threaded rod 5, and threaded sleeve 6;

[0037] Motor 4 is fixedly mounted on fixed frame 3. The output shaft of motor 4 passes through fixed frame 3. Threaded rod 5 is fixedly connected to the output shaft of motor 4. The outer side of threaded rod 5 is threadedly connected to the inner wall of threaded sleeve 6. Threaded sleeve 6 is fixedly connected to counterweight 7.

[0038] With the above structure, by activating the electric push rod 16 on the fixed frame 3, the positioning plate 8 and the threaded rod 5 can be unlocked. Then, the motor 4 is started, and the motor 4 drives the threaded rod 5 to rotate. The threaded rod 5 can then drive the threaded sleeve 6 and the counterweight 7 to move. The position of the counterweight 7 can be freely adjusted to meet the usage requirements of the crane's long boom and long lifting distance, so as to give full play to the performance of the crane.

[0039] As a preferred embodiment of the present invention, the fixing mechanism includes: a positioning plate 8 and a positioning frame 9;

[0040] The positioning disc 8 is fixedly sleeved on the outside of the threaded rod 5. The positioning frame 9 is slidably connected to the fixed frame 3. The positioning frame 9 cooperates with the positioning disc 8. After the positioning frame 9 and the positioning disc 8 are engaged, the positioning frame 9 can connect the positioning disc 8 to the fixed frame 3 to block the rotation of the positioning disc 8 on the fixed frame 3. The positioning disc 8 is fixedly connected to the threaded rod 5, which can realize the positioning of the positioning disc 8 and the threaded rod 5 to prevent external factors from affecting the position of the counterweight 7 and to prevent vibration and accidental contact from affecting the rotation of the threaded rod 5.

[0041] As a preferred embodiment of this utility model, the unlocking mechanism includes: a driving block 12, a pushing rod 13, a rotating rod 14, a pressing block 15, and an electric push rod 16;

[0042] The drive block 12 is fixedly installed on the positioning frame 9. The drive block 12 is rotatably connected to the push rod 13. The push rod 13 is rotatably connected to the rotating rod 14. The rotating rod 14 is rotatably connected to the fixed frame 3. The electric push rod 16 is fixedly connected to the fixed frame 3. The output shaft of the electric push rod 16 is fixedly connected to the push block 15. The bottom of the push block 15 slides in contact with the top of the rotating rod 14 and the push rod 13 respectively. After the electric push rod 16 is started, the electric push rod 16 presses the push block 15 down, so that the push block 15 can press down and rotate the rotating rod 14 and the push rod 13, so that the push rod 13 can push the positioning frame 9 to disengage from the positioning disk 8, thereby unlocking the positioning disk 8 and the threaded rod 5.

[0043] As a preferred embodiment of this utility model, the outer side of the positioning disk 8 is provided with a plurality of positioning grooves arranged at equal intervals, and a positioning block is fixedly installed on the rear side of the positioning frame 9. The outer side of the positioning block can be detachably engaged with the inner wall of the positioning groove. After the positioning block is inserted into the inner side of the positioning groove, the positioning block can prevent the positioning disk 8 from rotating, thereby achieving the positioning of the positioning disk 8 and the threaded rod 5.

[0044] As a preferred embodiment of this utility model, two symmetrically arranged springs 10 are fixedly installed on the left side of the positioning frame 9. Each of the two springs 10 has a fixing block 11 fixedly installed on its left end. The fixing block 11 is fixedly connected to the fixing frame 3. The springs 10 are used to reset the position of the positioning frame 9, so that the positioning frame 9 can automatically engage with the positioning disk 8 and automatically position the positioning disk 8 and the threaded rod 5.

[0045] As a preferred embodiment of this utility model, mounting brackets 2 are fixedly installed on both the left and right sides of the base 1. The mounting brackets 2 are used to install the fixing bracket 3 and the base 1 on the crane by bolts.

[0046] It should be noted that the specific model of motor 4 and electric actuator 16 used shall be selected by those skilled in the art, and the above-mentioned motor 4 and electric actuator 16 are all existing technologies, which will not be elaborated in this solution.

[0047] The working principle of this utility model is as follows: Mounting brackets 2 are fixedly installed on both the left and right sides of the base 1. The mounting brackets 2 are used to install the fixing bracket 3 and the base 1 onto the crane using bolts. After the base 1 is installed with bolts, the counterweight 7 can be used. The base 1 can be installed vertically or horizontally. When the position of the counterweight 7 needs to be adjusted, simply start the electric push rod 16 on the fixing bracket 3. After the electric push rod 16 is started, it presses down on the push block 15, causing the push block 15 to press down and rotate the rotating rod 14 and the pushing rod 13. This allows the pushing rod 13 to push the positioning bracket 9 away from the positioning plate 8, thus unlocking the positioning plate 8 and the threaded rod 5. Then, the motor 4 is started, driving the threaded rod 5 to rotate, which in turn drives the threaded sleeve 6. By moving the counterweight 7, its position can be freely adjusted to meet the needs of long boom and long lifting distances of the crane, thus maximizing the crane's performance. Then, the electric push rod 13 is activated again, causing the electric push rod 16 to rise and retract, which in turn drives the push block 15 to release the rotating rod 14 and the push rod 13. This releases the positioning frame 9, allowing it to automatically engage with the positioning disc 8. After the positioning frame 9 engages with the positioning disc 8, it connects the positioning disc 8 to the fixed frame 3, preventing the positioning disc 8 from rotating. The positioning disc 8 is fixedly connected to the threaded rod 5, thus achieving the positioning of the positioning disc 8 and the threaded rod 5. This prevents external factors from affecting the position of the counterweight 7 and prevents vibration and accidental contact from affecting the rotation of the threaded rod 5.

[0048] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mobile counterweight displacement hoist structure for a crane, characterized by, The utility model relates to a kind of movable heavy block, including Base (1); Counterweight (7), the counterweight (7) slidingly connected in the top of base (1); Fixed frame (3), the fixed frame (3) is fixedly installed in the top of base (1); Fixed mechanism and unlocking mechanism, the fixed mechanism is respectively matched with fixed frame (3) and unlocking mechanism; Moving mechanism, the moving mechanism includes: motor (4), threaded rod (5) and threaded sleeve (6); Motor (4) is fixedly installed in fixed frame (3), motor (4) output shaft penetrates fixed frame (3), threaded rod (5) is fixedly connected with motor (4) output shaft, the outer side of threaded rod (5) is connected with the inner wall of threaded sleeve (6) in screw, and threaded sleeve (6) is fixedly connected with counterweight (7).

2. A mobile counterweight displacement hoist structure according to claim 1, characterized in that, The fixed mechanism includes: positioning disc (8) and positioning frame (9); Positioning disc (8) is fixedly sleeved in the outer side of threaded rod (5), and positioning frame (9) is slidingly connected with fixed frame (3), and positioning frame (9) is matched with positioning disc (8).

3. A mobile counterweight displacement hoist structure according to claim 1, characterized in that, The unlocking mechanism includes: driving block (12), push rod (13), rotary rod (14), push block (15) and electric push rod (16); Driving block (12) is fixedly installed on positioning frame (9), and driving block (12) is rotatably connected with push rod (13), and push rod (13) is rotatably connected with rotary rod (14), and rotary rod (14) is rotatably connected on fixed frame (3), and electric push rod (16) is fixedly connected with fixed frame (3), and the output shaft of electric push rod (16) is fixedly connected with push block (15), and the bottom of push block (15) is slidingly contacted with the top of rotary rod (14) and push rod (13) respectively.

4. A mobile counterweight displacement hoist structure according to claim 2, characterized in that, The outer side of the positioning disc (8) is provided with a plurality of positioning grooves arranged at equal intervals, the rear side of the positioning frame (9) is fixedly installed with a positioning block, and the outer side of the positioning block is detachably connected with the inner wall of the positioning groove.

5. A mobile counterweight displacement hoist structure according to claim 2, characterized by, The left side of the positioning frame (9) is fixedly installed with symmetrically arranged springs (10), the number of the springs (10) is two, the left end of the two springs (10) is fixedly installed with a fixed block (11), and the fixed block (11) is fixedly connected with the fixed frame (3).

6. A mobile counterweight displacement hoist structure according to claim 1, characterized in that, The left side and the right side of the base (1) are fixedly installed with mounting frames (2).

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