Crawler crane main machine tail balance structure

Abstract

The utility model discloses a caterpillar crane main machine tail balance structure, including caterpillar crane and several counterweight blocks, caterpillar crane tail portion is equipped with two tail frames, and the rotation link is installed between two tail frames, wherein, the rotation link outside middle part is equipped with the rotation support frame, the rotation support frame outside is equipped with several support rings, and the connecting screw rod is rotatably connected to the inner wall of several support rings, and the threaded groove is set up on several counterweight blocks, and one tail frame side wall is equipped with the drive portion, the installation and dismounting of counterweight block are realized through motor drive connecting screw rod and threaded groove carries out the screw thread connection, do not need to rely on external hoisting equipment or caterpillar crane own boom and carry out the auxiliary hoisting, and the cumbersome link of hoisting counterweight block in traditional mode is saved, and the operation process is simplified, and the time required for counterweight adjustment when the multiple working conditions continuous operation is reduced, and the operation efficiency is improved, and the construction cost is also reduced.

Description

Technical Field

[0001] This utility model relates to the field of crane technology, specifically a tracked crane main tail balance structure. Background Technology

[0002] In the field of engineering construction, crawler cranes, as heavy lifting equipment, are widely used in major projects such as bridge construction and large equipment installation due to their strong load-bearing capacity and adaptability to complex terrain. When a crawler crane lifts a heavy object, the weight of the object borne by the boom will create an overturning moment on the track's ground contact edge. If this balance cannot be achieved, the equipment will become unstable and overturn. The main unit's tail balancing structure generates a counterbalancing moment through the weight of the tail counterweights, achieving mechanical balance with the overturning moment, which is the fundamental guarantee for safe operation. Currently, the main unit's tail balancing structure consists of a connecting frame and several counterweights. The connecting frame is fixed to the tail of the main unit, and the counterweights are installed one by one using pins, bolts, etc., to adjust the total weight. However, this method has obvious limitations: installation and disassembly rely on external lifting equipment or the assistance of the crane's own boom, and each item must be lifted and fixed or removed for storage, making the operation cumbersome and time-consuming. This significantly reduces efficiency and increases construction costs when operating continuously under multiple conditions. Meanwhile, the weight of a single counterweight can reach several tons or even tens of tons. During the lifting, docking or disassembly process, the posture must be precisely controlled to avoid collisions. Furthermore, the swaying of the counterweight, the stability of the rigging and the precision of personnel coordination all bring high safety risks. It is easy for it to fall or collide due to operational errors or equipment accidents, threatening the safety of personnel and equipment.

[0003] Therefore, this utility model provides a tracked crane main tail balancing structure. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a tracked crane main tail balancing structure to solve the aforementioned problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tracked crane tail balance structure, comprising a tracked crane and several counterweights. Two tail frames are installed at the tail of the tracked crane, and a rotating rod is installed between the two tail frames. A rotating support frame is installed on the outer center of the rotating rod, and several support rings are installed on the outer side of the rotating support frame. Connecting screws are rotatably connected to the inner walls of each of the support rings. Threaded grooves are formed on each of the counterweights, and the connecting screws are threadedly connected to the inner walls of the threaded grooves. A drive unit is installed on the side wall of one of the tail frames, and the output end of the drive unit is installed at the end of the rotating rod.

[0006] Preferably, side baffles are installed at both ends of the rotating rod, and the two side baffles are rotatably connected to the inner wall of the corresponding drive unit, and the counterweight is slidably connected between the two side baffles.

[0007] Preferably, each of the two side baffles is provided with a plurality of limiting guide plates on one side, the counterweight is slidably connected between the corresponding two limiting guide plates, and each of the two side baffles is provided with a clearance through hole, the clearance through hole being located between the corresponding four limiting guide plates.

[0008] Preferably, the inner walls of both side baffles are slidably connected to limit wedges, and the sides of several counterweights are provided with slots. Magnetic plates are installed on the inner walls of the slots, and the limit wedges are magnetically attracted to the magnetic plates. The two tailstocks are provided with notches on one side for the limit wedges to make way.

[0009] Preferably, a fixing rod is slidably connected to the inner wall of the limiting wedge, one end of the fixing rod is fixedly connected to an end plate, the other end of the fixing rod is installed on the side corresponding to the side plate, and a return spring is sleeved on the side wall of the fixing rod, the return spring being located between the limiting wedge and the end plate.

[0010] Preferably, one end of the limiting wedge is provided with a protrusion, and there is a gap between the protrusion and the corresponding side baffle.

[0011] Beneficial effects

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] This utility model utilizes a motor-driven connecting screw to a threaded groove for the installation and removal of the counterweight. It eliminates the need for external hoisting equipment or the crane's own boom for assisted lifting, thus removing the cumbersome steps of traditional counterweight hoisting methods. This simplifies the operation process, reduces the time required for counterweight adjustment during continuous multi-condition operations, improves work efficiency, and lowers construction costs. Furthermore, by preventing potential swaying of the counterweight during hoisting, it effectively reduces the safety risks of the counterweight falling or colliding due to operational errors or equipment accidents, ensuring the safety of personnel and equipment. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0015] Figure 2 This is a three-dimensional enlarged structural diagram of the present invention without the tracked crane;

[0016] Figure 3 This is an exploded and enlarged structural diagram of the rotating rod and counterweight in this utility model;

[0017] Figure 4 This is the utility model Figure 3 A magnified schematic diagram of the structure at point A in the middle.

[0018] In the diagram: 1. Tracked crane; 2. Tail frame; 21. Drive unit; 22. Notch; 3. Rotating rod; 31. Rotating support frame; 32. Support ring; 33. Connecting screw; 34. Side baffle; 341. Limiting guide plate; 342. Clearance through hole; 4. Counterweight; 41. Threaded groove; 42. Slot; 5. Limiting wedge; 51. Fixing rod; 511. End plate; 52. Return spring; 53. Protrusion. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-4 A tracked crane tail balance structure includes a tracked crane 1 and several counterweights 4. Two tail frames 2 are installed at the tail of the tracked crane 1, and a rotating rod 3 is installed between the two tail frames 2.

[0021] Among them, a rotating support frame 31 is installed on the middle of the outer side of the rotating rod 3, and several support rings 32 are installed on the outer side of the rotating support frame 31. The inner walls of the several support rings 32 are rotatably connected with connecting screws 33, and several counterweights 4 are provided with threaded grooves 41. The connecting screws 33 are threadedly connected to the inner walls of the threaded grooves 41.

[0022] It should be noted that the rotating support frame 31 described in this embodiment is equipped with several motors that drive the rotation of the connecting screw 33.

[0023] One of the tailstock 2 has a drive unit 21 installed on its side wall, and the output end of the drive unit 21 is installed at the end of the rotating rod 3.

[0024] It should be noted that the drive unit 21 described in this embodiment is a drive motor.

[0025] Specifically, the crawler crane 1 supports two tailstocks 2. A drive unit 21, installed on the side wall of one of the tailstocks 2, operates to rotate a rotating rod 3. This, in turn, causes the rotating support frame 31 and support ring 32 on the outer side of the rotating rod 3 to adjust their angles. The support ring 32 supports the connecting screw 33. When it is necessary to install the counterweight 4, the drive unit 21 controls the rotating rod 3 to rotate to a lower angle, allowing the counterweight 4 to be placed on the ground. The connecting screw 33 aligns with the threaded groove 41. Subsequently, the motor inside the rotating support frame 31 starts, driving the connecting screw 33 to rotate, precisely aligning the connecting screw 33 with the threaded groove 41 on the counterweight 4 and threading it in. The counterweight 4 rises to the position of the support ring 32, completing the installation of a single counterweight 4. The installation and fixing of multiple counterweight blocks 4 can be carried out sequentially through the connecting screws 33 on different support rings 32, thereby forming an overall counterweight structure. During the operation of the crawler crane, the counterweight block 4 is firmly fixed on the rotating rod 3 through the rotating support frame 31. Its gravity is transmitted to the tail frame 2 through the rotating rod 3, and then to the tail of the crawler crane 1 through the tail frame 2, generating a reverse balancing torque to counteract the overturning torque generated when the boom lifts heavy objects, ensuring the stable operation of the crawler crane equipment. When disassembling the counterweight block 4, the motor drives the connecting screw 33 to rotate in the opposite direction, causing it to disengage from the threaded groove 41. Then, the drive unit 21 adjusts the angle of the rotating rod 3 to move the counterweight block 4 to a suitable storage position, completing the disassembly.

[0026] In one embodiment of this utility model, such as Figures 1-4 As shown, side baffles 34 are installed at both ends of the rotating rod 3. Both side baffles 34 are rotatably connected to the inner wall of the corresponding drive unit 21, and the counterweight 4 is slidably connected between the two side baffles 34.

[0027] Specifically, the side baffles 34 installed at both ends of the rotating rod 3 rotate synchronously with the rotating rod 3 when the driving part 21 drives the rotating rod 3 to rotate; on the other hand, the counterweight 4 is slidably connected between the two side baffles 34, and the side baffles 34 play a lateral limiting role for the counterweight 4, preventing the counterweight 4 from shifting laterally, shaking or even falling off during the rotation of the rotating rod 3 or the operation of the crawler crane.

[0028] In one embodiment of this utility model, such as Figures 1-4 As shown, each of the two side baffles 34 has several limiting guide plates 341 on one side. The counterweight 4 is slidably connected between the corresponding two limiting guide plates 341. Each of the two side baffles 34 has a clearance through hole 342, which is located between the corresponding four limiting guide plates 341.

[0029] Specifically, several limiting guide plates 341 provided on one side of the two side baffles 34 provide a sliding guide channel for the counterweight 4, so that the counterweight 4 can slide accurately and stably between the corresponding two limiting guide plates 341, further limiting the sliding trajectory of the counterweight 4 and ensuring its positional accuracy in the lateral and sliding directions. At the same time, the clearance through holes 342 opened on the side baffles 34 are located between the corresponding four limiting guide plates 341, making it easy to observe the installation or disassembly process of the counterweight 4.

[0030] In one embodiment of this utility model, such as Figures 1-4 As shown, the inner walls of the two side baffles 34 are slidably connected with limit wedges 5, and several counterweights 4 are provided with slots 42 on both sides. Magnetic plates are installed on the inner walls of the slots 42. The limit wedges 5 are magnetically attracted to the magnetic plates. The two tail frames 2 are provided with notches 22 on one side for the limit wedges 5 to make way.

[0031] Specifically, the limiting wedges 5, which are slidably connected to the inner walls of the two side baffles 34, can be adjusted by sliding along the inner walls of the side baffles. When the counterweight 4 slides to the installation position via the limiting guide plate 341, the limiting wedges 5 slide into the slots 42 on both sides of the counterweight 4, forming a magnetic attraction with the magnetic plate on the inner wall of the slots 42, thereby longitudinally limiting and fixing the counterweight 4 and preventing it from sliding axially during the rotation of the rotating rod 3 or during operation. At the same time, the notches 22 on one side of the two tailstocks 2 provide clearance space for the limiting wedges 5 when the rotating rod 3 drives the side baffles 34 and the counterweight 4 to rotate to a specific angle, avoiding mutual interference between the tailstocks 2 and the sliding operation of the limiting wedges 5.

[0032] In one embodiment of this utility model, such as Figures 1-4 As shown, a fixed rod 51 is slidably connected to the inner wall of the limiting wedge 5. One end of the fixed rod 51 is fixedly connected to an end plate 511, and the other end of the fixed rod 51 is installed on the side of the corresponding side baffle 34. A return spring 52 is sleeved on the side wall of the fixed rod 51, and the return spring 52 is located between the limiting wedge 5 and the end plate 511.

[0033] Specifically, the limiting wedge 5 is connected to the side baffle 34 via a fixing rod 51. One end of the fixing rod 51 is fixed to one side of the side baffle 34, and the other end is limited by the end plate 511, allowing the limiting wedge 5 to slide axially along the fixing rod 51. The return spring 52, sleeved on the side wall of the fixing rod 51, is located between the limiting wedge 5 and the end plate 511. When the counterweight 4 slides to the installation position, the elastic force of the return spring 52 pushes the limiting wedge 5 to slide towards the slot 42, so that it is embedded in the slot 42 and magnetically attracted to the magnetic plate, thereby achieving automatic limiting and fixing of the counterweight 4. When it is necessary to remove the counterweight 4, the external force pushes the limiting wedge 5 to compress the return spring 52 and disengage from the slot 42, releasing the limiting. At this time, the return spring 52 stores elastic potential energy, and after the external force disappears, it can push the limiting wedge 5 to reset, waiting for the next limiting operation.

[0034] In one embodiment of this utility model, such as Figures 1-4 As shown, a protrusion 53 is provided at one end of the limiting wedge block 5, and there is a gap between the protrusion 53 and the corresponding side baffle 34.

[0035] Specifically, a gap is maintained between the protrusion 53 at one end of the limiting wedge 5 and the corresponding side baffle 34. This gap provides space for the sliding operation of the limiting wedge 5. When it is necessary to disassemble the counterweight 4, the operator can apply external force to the protrusion 53 through this gap, such as pushing or pulling, to drive the limiting wedge 5 to slide along the fixed rod 51 and compress the return spring 52, causing it to disengage from the slot 42 of the counterweight 4 and release the limiting fixation of the counterweight. At the same time, the protrusion 53 facilitates the application of external force to the limiting wedge 5, ensuring precise and effortless force application during operation, avoiding operational difficulties caused by the smooth surface of the limiting wedge 5 or limited space, ensuring that the limiting wedge 5 can smoothly complete the separation action from the slot 42, and achieve subsequent reset with the elasticity of the return spring 52, further improving the convenience of the counterweight installation and disassembly process.

[0036] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0037] Working principle: The crawler crane 1 supports two tail frames 2. The drive unit 21 on the tail frame 2 drives the rotating rod 3 to rotate, which in turn drives the rotating support frame 31 and support ring 32 to adjust their angles. When installing the counterweight 4, the rotating rod 3 rotates to the bottom, and the counterweight 4 is placed on the ground. The motor inside the rotating support frame 31 drives the connecting screw 33 to rotate, which is threadedly connected to the threaded groove 41 of the counterweight 4, raising it to the position of the support ring 32 and fixing it. Multiple counterweights 4 are installed sequentially through different support rings 32 to form an overall counterweight. During operation, the gravity of the counterweight 4 is distributed through the rotating rod 3 and the tail frame 2. The frame 2 is transmitted to the rear of the main unit, generating a reverse balancing torque to counteract the overturning torque. During disassembly, the motor drives the connecting screw 33 to rotate in the opposite direction and disengage from the threaded groove 41. The drive unit 21 adjusts the angle of the rotating rod 3 to move the counterweight 4 to the storage position. The side baffle 34 and the limiting guide plate 341 limit and guide the counterweight 4. The limiting wedge 5 is embedded in the slot 42 and attracted and fixed to the magnetic plate under the action of the return spring 52. The protrusion 53 facilitates the external force to drive the limiting wedge 5 to disengage from the slot 42, and provides operating space for the through hole 342 and the notch 22, ensuring convenient and safe installation and disassembly.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tracked crane tail balancing structure, comprising a tracked crane (1) and a plurality of counterweights (4), characterized in that, The tracked crane (1) has two tail frames (2) installed at its rear, and a rotating rod (3) is installed between the two tail frames (2). A rotating support frame (31) is installed on the middle of the outer side of the rotating rod (3). Several support rings (32) are installed on the outer side of the rotating support frame (31). A connecting screw (33) is rotatably connected to the inner wall of each of the several support rings (32). A threaded groove (41) is opened on each of the several counterweights (4). The connecting screw (33) is threaded to the inner wall of the threaded groove (41). One of the tailstocks (2) has a drive unit (21) mounted on its side wall, and the output end of the drive unit (21) is mounted on the end of the rotating rod (3).

2. The tracked crane main tail balancing structure according to claim 1, characterized in that, Both ends of the rotating rod (3) are equipped with side baffles (34), and both side baffles (34) are rotatably connected to the inner wall of the corresponding drive unit (21). The counterweight (4) is slidably connected between the two side baffles (34).

3. The tracked crane main tail balancing structure according to claim 2, characterized in that, Each of the two side baffles (34) is provided with a plurality of limiting guide plates (341) on one side. The counterweight (4) is slidably connected between the two corresponding limiting guide plates (341). Each of the two side baffles (34) is provided with a clearance through hole (342), which is located between the four corresponding limiting guide plates (341).

4. The tracked crane main tail balancing structure according to claim 3, characterized in that, Both side baffles (34) have slidably connected limit wedges (5) on their inner walls. Several counterweights (4) have slots (42) on both sides. The inner walls of the slots (42) are fitted with magnetic plates. The limit wedges (5) are magnetically attracted to the magnetic plates. Both tail frames (2) have notches (22) on one side for the limit wedges (5) to make way.

5. The tracked crane main tail balancing structure according to claim 4, characterized in that, A fixing rod (51) is slidably connected to the inner wall of the limiting wedge (5). One end of the fixing rod (51) is fixedly connected to an end plate (511), and the other end of the fixing rod (51) is installed on the side corresponding to the side baffle (34). A return spring (52) is sleeved on the side wall of the fixing rod (51), and the return spring (52) is located between the limiting wedge (5) and the end plate (511).

6. The tracked crane main tail balancing structure according to claim 5, characterized in that, One end of the limiting wedge (5) is provided with a protrusion (53), and there is a gap between the protrusion (53) and the corresponding side baffle (34).

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