A crane luffing counterweight mechanism that is easy to assemble
By designing a counterweight lifting bracket and arranging hydraulic pipelines within the cavity, the problem of excessively long assembly distances in variable amplitude counterweight mechanisms is solved, achieving convenient assembly and space optimization, making it suitable for short-distance transportation by cranes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU HONGCHANG TIANMA LOGISTICS EQUIP CO LTD
- Filing Date
- 2025-07-15
- Publication Date
- 2026-07-24
AI Technical Summary
In existing variable amplitude counterweight mechanisms, the assembly distance between the counterweight lifting cylinder and the counterweight block is too long, resulting in long assembly time and space occupation, which affects the overall vehicle transportation efficiency.
A counterweight lifting support was designed, including a connecting frame and a boom, which shortened the distance between the counterweight lifting cylinder and the counterweight block. The hydraulic pipeline was arranged in the inner cavity of the connecting frame, and a flexible hose was used instead of a rigid pipe. The column height was increased to facilitate the direct hanging of the counterweight block.
It enables convenient assembly of counterweights, shortens assembly time, reduces space occupation, and is suitable for short-distance vehicle transportation.
Smart Images
Figure CN224547940U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a crane luffing counterweight mechanism that is easy to assemble, and belongs to the field of crane technology. Background Technology
[0002] In the operation of large-tonnage articulated boom cranes, a counterweight mechanism is added to improve the crane's stability. Existing counterweight mechanisms are mostly fixed, luffing, or telescopic. To achieve the desired overall crane length, luffing counterweight mechanisms are widely used.
[0003] Existing variable-amplitude counterweight mechanisms generally include: a turntable, a vertical frame, a counterweight luffing cylinder, a counterweight fixed support, a counterweight telescopic cylinder, a counterweight telescopic support, a counterweight lifting cylinder, and a counterweight block. The vertical frame connects the turntable and the counterweight fixed support. The vertical frame is also connected to the counterweight fixed support via the counterweight luffing cylinder, the counterweight fixed support is connected to the counterweight telescopic support via the counterweight telescopic cylinder, and the counterweight telescopic support is connected to the counterweight block via the counterweight lifting cylinder.
[0004] Because the counterweight lifting cylinder is mounted on a relatively high counterweight telescopic bracket, and due to the limitation of its telescopic stroke, there is a certain distance between the cylinder and the counterweight. This prevents the cylinder from directly hooking the counterweight, requiring the assistance of pads or a crane, and also results in a long hooking and unhooking time. Furthermore, the existing variable-amplitude counterweight mechanism occupies considerable space in crane operations, hindering the transport of the entire vehicle with the counterweight. Utility Model Content
[0005] The purpose of this utility model is to address the shortcomings of the prior art by providing a crane luffing counterweight mechanism that is easy to assemble. This mechanism shortens the assembly distance between the counterweight lifting cylinder and the counterweight block, facilitates the loading and unloading of the counterweight block, reduces assembly time, and also saves space, enabling short-distance transportation of the entire vehicle with the counterweight.
[0006] The technical solution of this utility model is as follows: A crane luffing counterweight mechanism that is easy to assemble includes: a turntable, a vertical frame, a counterweight luffing cylinder, a counterweight fixing bracket, a counterweight telescopic cylinder, a counterweight telescopic bracket, a counterweight lifting cylinder, and a counterweight block. The vertical frame connects the turntable and the counterweight fixing bracket. The vertical frame is also connected to the counterweight fixing bracket via the counterweight luffing cylinder. The counterweight fixing bracket is connected to the counterweight telescopic bracket via the counterweight telescopic cylinder. The counterweight telescopic bracket is connected to the counterweight block via the counterweight lifting cylinder. Its characteristic is that the front end of the counterweight telescopic support is provided with a counterweight lifting support, which is composed of a middle connecting frame and two side booms; the connecting frame is fixedly installed at the end of the counterweight telescopic support, and the two booms are symmetrically arranged and inclined downwards; the high ends of the two booms are respectively fixedly installed at the two sides of the connecting frame, and the low ends are respectively connected to a pair of counterweight lifting cylinders. The boom includes a straight inclined part and a horizontal part, and the counterweight lifting cylinder is installed in the horizontal part, and the counterweight lifting cylinder is lower than the counterweight telescopic support.
[0007] In the above solution, by designing a counterweight lifting bracket, the front end of the counterweight telescopic bracket is widened and lowered to both sides, which shortens the assembly distance between the counterweight lifting cylinder and the counterweight block, solves the problem of insufficient cylinder stroke, and makes it easier for the counterweight lifting cylinder to directly hook the counterweight block; through the counterweight lifting bracket, the top of the counterweight lifting cylinder does not exceed the counterweight bracket, does not occupy the space above the counterweight telescopic bracket, does not interfere with the outside, reduces space, and is easy to retract and fold.
[0008] Furthermore, the connecting frame has an inner cavity to facilitate the routing of hydraulic pipelines.
[0009] In the existing technology, a pair of counterweight lifting cylinders are mounted on a counterweight telescopic support, and the matching balance valve is also mounted on the counterweight telescopic support. The related hydraulic pipes are exposed and require rigid pipes, which is inconvenient for hydraulic pipe management, aesthetically unappealing, and costly. With the above solution, the balance valve is mounted on the corresponding counterweight lifting cylinder, and the related hydraulic pipes, valve bodies, etc., can be arranged inside the connecting frame cavity, facilitating hydraulic pipe management and improving aesthetics. Furthermore, the hydraulic pipes located inside the connecting frame cavity can be made of flexible hoses, reducing costs.
[0010] Furthermore, the topmost counterweight has two pillars at its top, which connect to a pair of counterweight lifting cylinders. By adding two large pillars to the topmost counterweight, the height of the counterweight lifting lugs is increased, further solving the problem that the previous counterweight lifting cylinders could not be directly loaded and unloaded due to insufficient stroke.
[0011] Furthermore, the distance between the two columns is greater than the maximum width of the boom. After the counterweight telescopic bracket is widened on both sides (i.e., a counterweight lifting bracket is added), the distance between the two columns of the counterweight block is also increased, which can ensure that the boom does not interfere with the counterweight block when it is laid flat, further reducing the overall vehicle space and facilitating short-distance transport of the whole vehicle with the counterweight.
[0012] Furthermore, the distance between a pair of counterweight lifting cylinders is greater than the maximum width of the upright, which ensures that after the luffing is fully folded, the pair of counterweight lifting cylinders will not interfere with the upright, allowing for further folding and space reduction.
[0013] Furthermore, the piston rod of the counterweight lifting cylinder has a connector at its end, and the top of the column has a receiving cavity that matches the connector; the horizontal parts of a pair of booms are each provided with a lifting lug 1, the lifting lug 1 has a connecting hole 1, a fixing pad is provided between the pair of lifting lugs 1, and the bottom of the fixing pad is provided with an adjusting pad that is detachably and fixedly connected to it (the adjusting pad is installed at the bottom of the fixing pad by connecting bolts); the top of the column is provided with a lifting lug 2, the lifting lug 2 has a connecting hole 2; the lifting lug 1 and lifting lug 2 are connected as one unit by a pin passing through the connecting hole 1 and the connecting hole 2.
[0014] In the above scheme, during the upward movement of the piston rod of the counterweight lifting cylinder, when the second lug of the counterweight block abuts against the adjusting shim, the connecting hole of the boom lug aligns perfectly with the connecting hole of the counterweight block lug, facilitating shaft insertion. The adjusting shim is connected to the fixed shim via connecting bolts, and adjusting shims of different thicknesses can be replaced as needed. The specific method for hanging and removing the counterweight block is as follows: First, the turntable rotates the counterweight lifting cylinder to the relative position of the counterweight block; Then, start the counterweight luffing cylinder to extend and unfold the counterweight mechanism, and start the counterweight lifting cylinder to extend so that the connector at the end of the piston rod of the counterweight lifting cylinder is roughly aligned with the receiving cavity at the top of the counterweight block column. Next, activate the counterweight telescopic cylinder to extend, fine-tune the counterweight lifting cylinder, extend the connector into the receiving cavity, and enter the receiving cavity; Finally, the counterweight lifting cylinder is activated to retract upwards, and through the connection of the connector and the receiving cavity, it moves the column upwards until the second lifting lug of the column contacts the adjusting pad of the first lifting lug of the boom. At this time, the connecting holes of the first and second lifting lugs are aligned, and the pin is inserted into the first and second connecting holes to enable the counterweight lifting cylinder to directly pick up the counterweight block.
[0015] This utility model has a simple and reasonable structure and is easy to manufacture. The counterweight lifting cylinder can directly hang the counterweight block, realizing convenient self-assembly of the counterweight block. After the luffing mechanism is fully folded, the counterweight lifting cylinder does not interfere with the upright frame, and after the boom is flattened, it does not interfere with the counterweight block, which can solve the problem of short-distance transportation of the whole vehicle with counterweight. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the counterweight mechanism of this utility model. Figure 1 (Expanded state); Figure 2 This is a schematic diagram of the counterweight mechanism of this utility model. Figure 2 (Expanded state); Figure 3 This is a schematic diagram of the connection between the boom and the column in this utility model. Figure 1 ; Figure 4This is a schematic diagram of the connection between the boom and the column in this utility model. Figure 2 ; Figure 5 This is a schematic diagram of the counterweight mechanism of this utility model. Figure 3 (Fully folded); Figure 6 This is a schematic diagram showing the connection between the counterweight lifting bracket and the counterweight lifting cylinder in this utility model; Figure 7 This is a schematic diagram showing the connection between the counterweight lifting bracket and the counterweight telescopic bracket in this utility model; Figure 8 This is a schematic diagram of the crane body when the crane boom is folded (the counterweight mechanism is not shown). In the diagram: 1. Counterweight luffing cylinder; 2. Counterweight fixed bracket; 3. Counterweight telescopic cylinder; 4. Counterweight telescopic bracket; 5. Counterweight lifting cylinder; 6. Counterweight block; 7. Turntable; 8. Frame; 9. Counterweight lifting bracket; 9-1. Connecting frame; 9-2. Boom; 9-2-1. Inclined section; 9-2-2. Horizontal section; 10. Balance valve; 11. Column; 12. Boom; 13. Connecting connector; 14. Lifting lug 1; 15. Connecting hole 1; 16. Fixing pad; 17. Adjusting pad; 18. Lifting lug 2; 19. Connecting hole 2; 20. Car body; 21. Detailed Implementation
[0017] A crane luffing counterweight mechanism that is easy to assemble, such as Figure 1 , Figure 2 , Figure 5 As shown, it includes: a counterweight luffing cylinder 1, a counterweight fixed bracket 2, a counterweight telescopic cylinder 3, a counterweight telescopic bracket 4, a counterweight lifting cylinder 5, a counterweight block 6, a turntable 7, and a vertical frame 8. The vertical frame connects the turntable and the counterweight fixed bracket. The bottom of the vertical frame is connected to the counterweight fixed bracket via the counterweight luffing cylinder, which is used to luff and fold the bracket (e.g., ...). Figure 5 (As shown). The counterweight telescopic bracket and the counterweight fixed bracket are connected by a counterweight telescopic cylinder. The counterweight telescopic bracket is connected to the counterweight block via a counterweight lifting cylinder, and the counterweight block extends and retracts vertically via the counterweight lifting cylinder.
[0018] like Figure 2 , Figure 6 , Figure 7As shown, the front end of the counterweight telescopic support is equipped with a counterweight lifting support 9, which is composed of a connecting frame 9-1 in the middle and two booms 9-2 on both sides. The booms include a straight section 9-2-1 and a horizontal section 9-2-2. The connecting frame is fixedly installed at the end of the counterweight telescopic support, and the two booms are arranged symmetrically and inclined downwards. The high ends (straight sections) of the two booms are fixedly installed on both sides of the connecting frame, and the low ends (horizontal sections) are connected to a pair of counterweight lifting cylinders. The counterweight lifting cylinders are lower than the counterweight telescopic support, which shortens the assembly distance between the counterweight lifting cylinders and the counterweight, making it easier to directly hang the counterweight without occupying the space above the counterweight telescopic support, and facilitating retraction and folding.
[0019] In one embodiment of this utility model, such as Figure 2 , Figure 6 As shown, the connecting frame 9-1 has an inner cavity, on which the balance valve 10 is installed on the corresponding counterweight lifting cylinder. Related hydraulic pipes, valve bodies, etc. can be arranged in the inner cavity of the connecting frame. The hydraulic pipes in the inner cavity of the connecting frame are selected as hoses.
[0020] In one embodiment of this utility model, such as Figure 2 As shown, the topmost counterweight 6 has two uprights 11 connected to a pair of counterweight lifting cylinders. The distance between the two uprights is greater than the maximum width of the boom 12. After the counterweight telescopic support is widened on both sides (i.e., a counterweight lifting support is added), the distance between the two uprights of the counterweight is also increased, ensuring that the boom does not interfere with the counterweight when it is laid flat (e.g., ...). Figure 8 As shown in the figure, the overall vehicle space is further reduced, making it easier to transport the whole vehicle with counterweight over short distances.
[0021] In one embodiment of this utility model, the distance between a pair of counterweight lifting cylinders is greater than the maximum width of the upright, which ensures that after the luffing is fully folded, the pair of counterweight lifting cylinders do not interfere with the turntable (e.g., Figure 5 (As shown), fold it further to reduce space.
[0022] In one embodiment of this utility model, such as Figure 3 , Figure 4 As shown, the piston rod of the counterweight lifting cylinder has a connector 13 at its end, and a receiving cavity 14 matching the connector is provided at the top of the column. A pair of booms have lifting lugs 15 on their horizontal sections, each lug having a connecting hole 16. A fixing pad 17 is provided between the two lugs, and an adjusting pad 18 is installed at the bottom of the fixing pad via connecting bolts. A second lifting lug 19 is provided at the top of the column, with a connecting hole 20. A pin passes through connecting holes 1 and 2, connecting lugs 1 and 2 together. During the upward movement of the piston rod of the counterweight lifting cylinder, when the second lifting lug of the counterweight block abuts against the adjusting pad, the connecting hole of the boom lug aligns with the connecting hole of the counterweight lug, facilitating the insertion of the pin.
Claims
1. A crane luffing counterweight mechanism that is easy to assemble, comprising: The system includes a turntable, a vertical frame, a counterweight luffing cylinder, a counterweight fixed support, a counterweight telescopic cylinder, a counterweight telescopic support, a counterweight lifting cylinder, and a counterweight block. The vertical frame connects the turntable and the counterweight fixed support. The vertical frame is also connected to the counterweight fixed support via the counterweight luffing cylinder. The counterweight fixed support is connected to the counterweight telescopic support via the counterweight telescopic cylinder. The counterweight telescopic support is connected to the counterweight block via the counterweight lifting cylinder. Its characteristic is that the front end of the counterweight telescopic support is provided with a counterweight lifting support, which is composed of a middle connecting frame and two side booms; the connecting frame is fixedly installed at the end of the counterweight telescopic support, and the two booms are arranged symmetrically and inclined downwards; the high ends of the two booms are respectively fixedly installed at the two sides of the connecting frame, and the low ends are respectively connected to a pair of counterweight lifting cylinders.
2. The crane luffing counterweight mechanism according to claim 1, characterized in that, The connecting frame has an inner cavity to facilitate the routing of hydraulic pipelines.
3. The crane luffing counterweight mechanism according to claim 2, characterized in that, The boom includes a vertical section and a horizontal section, and the counterweight lifting cylinder is installed on the horizontal section.
4. The crane luffing counterweight mechanism according to claim 3, characterized in that, The counterweight lifting cylinder is lower than the counterweight telescopic bracket.
5. A crane luffing counterweight mechanism that is easy to assemble according to claim 4, characterized in that, The topmost counterweight has two pillars on top, which are connected to a pair of counterweight lifting cylinders.
6. A crane luffing counterweight mechanism that is easy to assemble according to claim 5, characterized in that, The distance between the two columns is greater than the maximum width of the boom.
7. A crane luffing counterweight mechanism that is easy to assemble according to claim 6, characterized in that, The distance between a pair of counterweight lifting cylinders is greater than the maximum width of the upright.
8. A crane luffing counterweight mechanism that is easy to assemble according to claim 7, characterized in that, The piston rod of the counterweight lifting cylinder has a connector at its end, and the top of the column has a receiving cavity that matches the connector. Each of the horizontal sections of a pair of booms is provided with a lifting lug 1, the lifting lug 1 is provided with a connecting hole 1, a fixing pad is provided between the pair of lifting lug 1, and an adjusting pad is provided at the bottom of the fixing pad for detachable and fixed connection; the top of the column is provided with a lifting lug 2, the lifting lug 2 is provided with a connecting hole 2; the lifting lug 1 and lifting lug 2 are connected into one piece by passing a pin through the connecting hole 1 and the connecting hole 2.
9. A crane luffing counterweight mechanism that is easy to assemble according to claim 8, characterized in that, The adjusting pad is installed at the bottom of the fixing pad by connecting bolts.