Adjustable crane balancing weight mounting structure

Abstract

The utility model discloses an adjustable crane balancing weight mounting structure, which belongs to the technical field of cranes, and adopts the technical scheme that the adjustable crane balancing weight mounting structure comprises a connecting block, a bearing frame is welded on the front side of the connecting block, and an adjusting assembly is arranged in the bearing frame. The right sliding block in threaded connection with the lead screw moves in the sliding groove, then the balance weight assembly is driven to adjust the position, precise balance weight is achieved, in the process, the rotating wheels rotationally connected into the grooves in the sliding blocks and the connecting blocks play a key role, the rotating wheels make contact with the inner wall of the sliding groove through the rotating shafts, traditional sliding friction is converted into rolling friction, and therefore the balance weight assembly is more precise. As the rolling friction coefficient is far lower than that of sliding friction, the friction force is greatly reduced, the moving efficiency is improved when the position of the counterweight assembly is adjusted, the energy loss is reduced, and the service life of each part of the adjusting assembly is effectively prolonged due to smaller abrasion.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, and in particular to an adjustable crane counterweight installation structure. Background Technology

[0002] A crane is a multi-action lifting machine that vertically lifts and horizontally moves heavy objects within a certain range. It is also known as an overhead crane, gantry crane, or hoist. Some lifting equipment has the characteristic of intermittent movement, that is, the corresponding mechanisms for picking up, moving, and unloading materials work alternately in a work cycle. Cranes are becoming increasingly widespread in the market. Due to the fact that they do not use outriggers to lift heavy objects and travel while lifting, some accidents often occur. The travel speed is also faster than that of crawler cranes. Cranes are stable in operation, have a large lifting capacity, and can travel while lifting heavy objects within a certain range. However, it is necessary to ensure that the road is flat and firm, the tire pressure meets the requirements, and the lifting height is not more than 50 cm off the ground. Long-distance travel with a load is prohibited. To ensure operational safety, lifting operations without outriggers are basically prohibited in China. The types of wire ropes used with cranes include phosphated coated wire ropes, galvanized wire ropes, and bright wire ropes.

[0003] Currently, most cranes on the market require counterweights to maintain their balance during operation. However, when assembling counterweights, they are usually simply placed on one side of the crane without being secured. This causes the counterweights to sway at high altitudes, and the swaying counterweights rub against the surface of the crane. Over time, this will cause wear and tear on the crane's surface, affecting its normal operation.

[0004] An existing patent (publication number: CN221165740U) discloses a crane counterweight block that is easy to assemble. This utility model can adjust the position of the counterweight box through the adjustment component, which ensures the balance of the crane. The counterweight block is fixed by the counterweight component to prevent the counterweight block from shaking during the operation of the crane and causing damage to the crane body. This device has a simple structure and is easy to use, which meets the current usage requirements.

[0005] To address the aforementioned issues, existing patents offer solutions. However, the adjustment components proposed in these patents have certain drawbacks. When adjusting the counterweight box position, the lead screw motor drives the lead screw to move the slider connected to the counterweight box along the guide rod surface within the lead screw groove. This results in contact friction between the slider surface and the inside of the lead screw groove. Simultaneously, the limiting slider connected to the other side of the counterweight box slides within the limiting groove inside the load-bearing frame, also resulting in contact friction. With the counterweight box being used for balancing, this friction not only affects the movement efficiency but also causes significant wear. After prolonged use, this can lead to uneven movement, increasing maintenance costs and affecting the normal operation of the equipment. Furthermore, the counterweight box in this patent has a limited volume. If the counterweight is still insufficient after being filled, it cannot be expanded to add more weight. This has limitations in practical use, making it difficult to meet the diverse needs for counterweight under different working conditions and hindering the efficient and stable operation of the crane.

[0006] To address this, an adjustable crane counterweight installation structure is proposed. Utility Model Content

[0007] The purpose of this utility model is to provide an adjustable crane counterweight installation structure that can solve certain defects of the adjustment components proposed in the above-mentioned patent. When adjusting the position of the counterweight box, the lead screw motor drives the lead screw to move the slider connected to the counterweight box along the guide rod surface in the lead screw groove. The slider surface and the inside of the lead screw groove will generate contact friction. At the same time, the limiting slider connected to the other side of the counterweight box slides in the limiting groove inside the load-bearing frame, which is also contact friction. When the counterweight box is used for balancing, this friction not only affects the movement efficiency, but also causes greater wear. After long-term use, the movement will become less smooth, increasing maintenance costs and affecting the normal operation of the equipment. In addition, the counterweight box in this patent has a limited volume. When it is full, if the counterweight is still insufficient, it cannot be expanded and added. This has certain limitations in practical use and is difficult to meet the diverse needs of counterweight under different working conditions, which is not conducive to the efficient and stable operation of the crane.

[0008] To achieve the above objectives, this utility model provides the following technical solution: an adjustable crane counterweight installation structure, including a connecting block, a load-bearing frame welded to the front side of the connecting block, an adjustment component inside the load-bearing frame, and a counterweight component inside the adjustment component.

[0009] The adjustment assembly includes sliding grooves on both sides inside the load-bearing frame. A motor is installed on the front side of the load-bearing frame, and a lead screw is fixedly connected to the output end of the motor. The lead screw is located inside the right sliding groove. A slider is slidably connected inside the sliding groove. The inner side of the slider is fixedly connected to the counterweight assembly. The right slider is threadedly connected to the outer side of the lead screw. A connecting block is welded to the outer side of the slider. Grooves are provided on the top and bottom of the slider and on the top, bottom, and inner side of the connecting block. A rotating wheel is rotatably connected inside the groove. Rotating shafts are provided on the top and bottom of both sides of the slider. The outer sides of the rotating wheel and the rotating shaft are in contact with the inner wall of the sliding groove.

[0010] Preferably, the counterweight assembly includes a counterweight box fixedly connected to the inside of the slider, and limit sleeves are fixedly connected to the top of both sides inside the counterweight box.

[0011] Preferably, the limiting sleeve is provided with a counterweight plate inside, and the counterweight plate is located inside the counterweight box.

[0012] Preferably, a rubber buffer pad is provided on the bottom side inside the counterweight box, the top of the rubber buffer pad is in contact with the bottom of the counterweight plate, and an expansion structure is provided on the front side of the counterweight box.

[0013] Preferably, the expansion structure includes a support plate welded to the bottom front side of the counterweight box, a reinforcing rod welded to the top of the support plate, and the top of the reinforcing rod welded to the top front side of the counterweight box.

[0014] Preferably, a fixing rod is welded to the inner side of the reinforcing rod, a threaded rod is threaded to the inside of the fixing rod, a pressure plate is rotatably connected to the bottom of the threaded rod, and auxiliary rods are welded to both sides of the top of the pressure plate, with the top of the auxiliary rod penetrating the bottom of the fixing rod.

[0015] Preferably, a rotating column is fixedly connected to the bottom of the connecting block, a vertical column is rotatably connected to the bottom of the rotating column, a connecting plate is fixedly connected to the right side of the connecting block, and an operating compartment is provided on the top of the connecting plate.

[0016] Preferably, an anti-slip pad is adhered to the bottom of the pressure plate, and the anti-slip pad is made of rubber material.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This application, by setting an adjustment component, after the motor is started, the motor output drives the lead screw to rotate, and the right slider connected to the lead screw moves in the slide groove accordingly, thereby driving the counterweight component to adjust its position and achieve precise counterweight. In this process, the rotating wheel connected to the groove on the slider and the connecting block plays a key role. The rotating wheel contacts the inner wall of the slide groove through the rotating shaft, transforming the traditional sliding friction into rolling friction. Since the coefficient of rolling friction is much lower than that of sliding friction, the friction force is greatly reduced. This not only improves the moving efficiency when adjusting the position of the counterweight component and reduces energy loss, but also effectively extends the service life of each component of the adjustment component due to less wear. In this way, the equipment is guaranteed to operate stably and smoothly in long-term use, and the maintenance cost is greatly reduced. It successfully solves the problems of low moving efficiency, high wear and high maintenance cost caused by friction in the prior art.

[0019] 2. This application, by setting up a counterweight component, allows for flexible adjustment of the counterweight according to the diverse needs of different working conditions when the counterweight component itself reaches its maximum capacity but still fails to meet the counterweight requirements. This overcomes the limitations of the fixed volume of the traditional counterweight box, improves the adaptability of the crane in various operating scenarios, and facilitates the efficient and stable operation of the crane. Attached Figure Description

[0020] Figure 1 This is an overall structural diagram of the adjustable crane counterweight mounting structure of this utility model;

[0021] Figure 2 This is a structural diagram of the load-bearing frame of this utility model;

[0022] Figure 3 This is a structural diagram of the adjustment component of this utility model;

[0023] Figure 4 This is a structural diagram of the counterweight component of this utility model;

[0024] Figure 5 This is a structural diagram of the expanded structure of this utility model.

[0025] In the diagram: 1. Connecting block; 2. Rotating column; 3. Column; 4. Support frame; 5. Adjustment component; 51. Slide groove; 52. Motor; 53. Lead screw; 54. Sliding block; 55. Connecting block; 56. Groove; 57. Rotating wheel; 58. Rotating shaft; 6. Counterweight component; 61. Counterweight box; 62. Limiting sleeve; 63. Counterweight plate; 64. Rubber buffer pad; 65. Expansion structure; 651. Bearing plate; 652. Reinforcing rod; 653. Fixing rod; 654. Threaded rod; 655. Pressure plate; 656. Auxiliary rod; 7. Connecting plate; 8. Operating chamber; 9. Anti-slip pad. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 The present invention provides the following technical solution:

[0028] An adjustable crane counterweight mounting structure includes a connecting block 1, a load-bearing frame 4 welded to the front side of the connecting block 1, an adjustment component 5 disposed inside the load-bearing frame 4, and a counterweight component 6 disposed inside the adjustment component 5.

[0029] The adjusting component 5 includes slide grooves 51 on both sides inside the load-bearing frame 4. A motor 52 is installed on the front side of the load-bearing frame 4. A lead screw 53 is fixedly connected to the output end of the motor 52. The lead screw 53 is located inside the right slide groove 51. A slider 54 is slidably connected inside the slide groove 51. The inner side of the slider 54 is fixedly connected to the counterweight component 6. The right slider 54 is threaded to the outer side of the lead screw 53. A connecting block 55 is welded to the outer side of the slider 54. Grooves 56 are provided on the top and bottom of the slider 54 and on the top, bottom and inner side of the connecting block 55. A rotating wheel 57 is rotatably connected inside the groove 56. A rotating shaft 58 is provided on the top and bottom of both sides of the slider 54. The outer sides of the rotating wheel 57 and the rotating shaft 58 are in contact with the inner wall of the slide groove 51.

[0030] In this embodiment: By setting the adjustment component 5 and the counterweight component 6, when the position of the counterweight component 6 needs to be adjusted, the motor 52 is started. The output end of the motor 52 drives the lead screw 53 to rotate. Since the right slider 54 is threadedly connected to the lead screw 53, when the lead screw 53 rotates, the slider 54 will move along the right slide groove 51. At the same time, the left slider 54 will also slide synchronously in the corresponding slide groove 51, ensuring the smooth movement of the counterweight component 6. In this process, the slider 54 and the rotating wheel 57 on the connecting block 55 play an important role. The rotating wheel 57 contacts the inner wall of the slide groove 51 through the rotating shaft 58, changing the traditional sliding friction into rolling friction. The low coefficient of dynamic friction makes the slider 54 move more easily, reducing friction and thus improving adjustment efficiency and reducing energy loss. Moreover, the wear caused by rolling friction is much less than that caused by sliding friction, which extends the service life of each component of the adjustment assembly 5, ensures long-term stable and smooth operation of the equipment, and reduces maintenance costs. In addition, the counterweight assembly 6 not only has a certain counterweight capacity, but more importantly, it has an expandable design to increase the counterweight weight. When the counterweight carried by the counterweight assembly 6 alone cannot meet the needs of the crane under different working conditions, the counterweight can be increased by expanding the structure, so that the counterweight can be increased flexibly.

[0031] Specifically, such as Figure 4 As shown, the counterweight assembly 6 includes a counterweight box 61 fixedly connected to the inside of the slider 54, and limit sleeves 62 are fixedly connected to the top of both sides inside the counterweight box 61.

[0032] Specifically, such as Figure 4 As shown, a counterweight plate 63 is provided inside the limiting sleeve 62, and the counterweight plate 63 is located inside the counterweight box 61.

[0033] Specifically, such as Figure 4 As shown, a rubber buffer pad 64 is provided on the bottom side inside the counterweight box 61, and the top of the rubber buffer pad 64 contacts the bottom of the counterweight plate 63. An expansion structure 65 is provided on the front side of the counterweight box 61.

[0034] In this embodiment: by setting the counterweight assembly 6, the counterweight box 61 is fixed inside the slider 54 and can move precisely to the appropriate position with the slider 54 to achieve balanced counterweight. The limiting sleeves 62 on the top of both sides inside can position the counterweight plate 63 to prevent it from shaking randomly inside the counterweight box 61, ensuring the stability of the counterweight during crane operation. The rubber buffer pad 64 at the bottom of the counterweight box 61 plays a buffering role when the counterweight plate 63 is placed, reducing the collision between the counterweight plate 63 and the bottom of the counterweight box 61, which not only protects the counterweight box 61 and the counterweight plate 63, but also further reduces the vibration that may be generated during operation. The expansion structure 65 on the front side of the counterweight box 61 gives the counterweight assembly 6 the ability to expand. When the existing counterweight is insufficient, the counterweight can be increased to meet the needs of different working conditions, improving the applicability of the crane in complex working environments.

[0035] Specifically, such as Figure 5 As shown, the expansion structure 65 includes a bearing plate 651 welded to the bottom front side of the counterweight box 61, and a reinforcing rod 652 welded to the top of the bearing plate 651. The top of the reinforcing rod 652 is welded to the top front side of the counterweight box 61.

[0036] Specifically, such as Figure 5 As shown, a fixing rod 653 is welded to the inner side of the reinforcing rod 652. A threaded rod 654 is threadedly connected to the inside of the fixing rod 653. A pressure plate 655 is rotatably connected to the bottom of the threaded rod 654. Auxiliary rods 656 are welded to both sides of the top of the pressure plate 655. The top of the auxiliary rod 656 passes through the bottom of the fixing rod 653.

[0037] In this embodiment: by setting up the expansion structure 65, the bearing plate 651 and the reinforcing rod 652 form a stable bearing frame, which enhances the overall stability of the expansion structure 65 and provides reliable support for the additional counterweight. When it is necessary to add counterweight, the new counterweight is placed on the bearing plate 651. By rotating the threaded rod 654, since the threaded rod 654 is threadedly connected to the fixed rod 653, the rotation of the threaded rod 654 will drive the pressure plate 655 to move up and down. The through design of the auxiliary rods 656 on both sides of the top of the pressure plate 655 at the bottom of the fixed rod 653 ensures the stability of the movement of the pressure plate 655 and prevents it from shifting. When pressing the new counterweight downward, it can effectively prevent it from slipping, ensuring that the additional counterweight is stably installed, thereby achieving the purpose of flexibly adding counterweight and meeting the counterweight requirements of different crane operations.

[0038] Specifically, such as Figure 1 As shown, a rotating column 2 is fixedly connected to the bottom of the connecting block 1, and a column 3 is rotatably connected to the bottom of the rotating column 2. A connecting plate 7 is fixedly connected to the right side of the connecting block 1, and an operating chamber 8 is provided on the top of the connecting plate 7.

[0039] Specifically, such as Figure 5 As shown, an anti-slip pad 9 is adhered to the bottom of the pressure plate 655. The anti-slip pad 9 is made of rubber material.

[0040] In this embodiment: through the rotation column 2, column 3, connecting plate 7, operating compartment 8, and anti-slip pad 9, the cooperation of the rotation column 2 and column 3 allows the connecting block 1 and its connected adjusting components 5 and counterweight components 6 to rotate flexibly, facilitating the adjustment of the counterweight position when the crane is operating in different directions, thus enhancing the operational flexibility of the equipment. The operating compartment 8 on the connecting plate 7 provides a convenient operating space for the operator, making it easy to control and adjust components such as the motor 52 using the built-in controller, ensuring normal human-machine interaction. The anti-slip pad 9 is made of rubber material, which not only prevents the counterweight from slipping when the pressure plate 655 presses the counterweight, but also ensures the stability of the counterweight during crane operation, even if it encounters bumps or vibrations, reducing the safety risks caused by counterweight movement, and comprehensively ensuring the safety and efficiency of crane operation.

[0041] Working Principle: During crane operation, when the counterweight position needs adjustment, the operator starts the motor 52 via the controller in the operating compartment 8. The output of the motor 52 drives the lead screw 53 to rotate. The right slider 54, being threadedly connected to the lead screw 53, moves along the right slide groove 51. Simultaneously, the left slider 54 slides synchronously within its corresponding slide groove 51, ensuring the smooth movement of the counterweight box 61 fixed inside the slider 54. During this process, the rollers 57 on the slider 54 and connecting block 55 play a crucial role. The rollers 57 contact the inner wall of the slide groove 51 via the rotating shaft 58, transforming traditional sliding friction into rolling friction, reducing friction, improving adjustment efficiency, reducing energy loss, extending the service life of the adjustment component 5, and reducing maintenance costs. Furthermore, the limiting sleeves 62 on the top of both sides of the counterweight box 61 position the counterweight plate 63 to prevent it from wobbling. The rubber buffer pad 64 reduces collisions and vibrations during the placement of the counterweight plate 63. When encountering complex working conditions, if the existing counterweight plate 63 in the counterweight box 61 is insufficient to meet the requirements, the expansion structure 65 begins to play its role. The bearing plate 651 and the reinforcing rod 652 form a stable frame, and the new counterweight is placed on the bearing plate 651. The operator operates in the operating chamber 8, and by rotating the threaded rod 654, the pressure plate 655 is moved up and down by its threaded connection with the fixed rod 653. The auxiliary rods 656 on both sides of the top of the pressure plate 655 ensure that its movement is stable and does not deviate. The rubber anti-slip pad 9 at the bottom of the pressure plate 655 increases the friction between it and the new counterweight to prevent slippage, thus realizing flexible addition of counterweight. In addition, the rubber anti-slip pad 9 can ensure the stability of the counterweight when pressing the counterweight and when the crane is running bumpy and vibrating, reducing safety risks and comprehensively ensuring the safety and efficiency of crane operation.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An adjustable counterweight mounting structure for a crane comprising a link block (1), characterised in that: The front side of the connecting block (1) is welded with a load-bearing frame (4), the inside of the load-bearing frame (4) is provided with an adjusting assembly (5), and the inner side of the adjusting assembly (5) is provided with a counterweight assembly (6). The adjusting assembly (5) comprises a sliding groove (51) opened on both sides of the inside of the load-bearing frame (4), a motor (52) is arranged on the front side of the load-bearing frame (4), the output end of the motor (52) is fixedly connected with a lead screw (53), the lead screw (53) is located in the inside of the right sliding groove (51), a sliding block (54) is slidably connected in the inside of the sliding groove (51), the inner side of the sliding block (54) is fixedly connected with the counterweight assembly (6), the right sliding block (54) is threadedly connected on the outside of the lead screw (53), the outside of the sliding block (54) is welded with a connecting block (55), and the top and bottom of the sliding block (54) and the top, bottom and inner side of the connecting block (55) are all provided with a recess (56), a rotating wheel (57) is rotatably connected in the recess (56), and the top and bottom of the sliding block (54) on both sides are provided with a rotating shaft (58). The outer sides of the rotating wheel (57) and the rotating shaft (58) are in contact with the inner wall of the inside of the sliding groove (51).

2. An adjustable counterweight block mounting structure according to claim 1, characterized in that: The counterweight assembly (6) comprises a counterweight box (61) fixedly connected to the inner side of the sliding block (54), and the top of both sides of the inside of the counterweight box (61) is fixedly connected with a limiting sleeve (62).

3. An adjustable counterweight block mounting structure according to claim 2, characterized in that: The inside of the limiting sleeve (62) is provided with a counterweight plate (63), and the counterweight plate (63) is located in the inside of the counterweight box (61).

4. An adjustable counterweight block mounting structure according to claim 3, characterized in that: The bottom side of the inside of the counterweight box (61) is provided with a rubber buffer pad (64), the top of the rubber buffer pad (64) is in contact with the bottom of the counterweight plate (63), and the front side of the counterweight box (61) is provided with an expansion structure (65).

5. An adjustable counterweight block mounting structure according to claim 4, characterized in that: The expansion structure (65) comprises a bearing plate (651) welded to the bottom of the front side of the counterweight box (61), the top of the bearing plate (651) is welded with a reinforcing rod (652), and the top of the reinforcing rod (652) is welded to the top of the front side of the counterweight box (61).

6. An adjustable counterweight block mounting structure according to claim 5, characterized in that: The inner side of the reinforcing rod (652) is welded with a fixing rod (653), the inside of the fixing rod (653) is threadedly connected with a threaded rod (654), the bottom of the threaded rod (654) is rotatably connected with a pressing plate (655), both sides of the top of the pressing plate (655) are welded with an auxiliary rod (656), and the top of the auxiliary rod (656) penetrates through the bottom of the fixing rod (653).

7. An adjustable counterweight block mounting structure according to claim 1, characterized in that: The bottom of the pressing plate (655) is bonded with a non-slip pad (9) made of rubber material.

8. An adjustable counterweight block mounting structure according to claim 6, characterized in that: ​

Images