Landing leg for crane

Abstract

The utility model discloses a landing leg for a crane, and relates to the technical field of landing legs for cranes, in particular to a landing leg for a crane, which comprises a foundation wall and a telescopic arm, the telescopic arm is movably connected in the foundation wall through a straight groove, an oil box is fixedly connected on the upper side in the telescopic arm, an oil filling mechanism is arranged in the oil box, and the oil filling mechanism is arranged in the oil box. The oiling mechanism comprises a volute spiral spring, the right side of the volute spiral spring is movably connected with a steel rope disc, the right side of the steel rope disc is fixedly connected with a wave ring, the right side of the wave ring is in contact with a passive wave ring, the right side of the passive wave ring is fixedly connected with a piston column, and the outer surface of the piston column is sleeved with a piston shell. According to the crane supporting leg lubricating device, through the wave surface matching structure of the wave ring and the driven wave ring, the rotating motion of the steel rope disc is converted into the left-right reciprocating motion of the driven wave ring, the piston column is driven to do piston motion in the piston shell, and the effect of achieving lubrication according to needs according to the telescopic motion of the supporting leg is achieved.

Description

Technical Field

[0001] This utility model relates to the field of crane outrigger technology, specifically a crane outrigger. Background Technology

[0002] Cranes are indispensable heavy machinery in modern engineering construction and port loading and unloading, undertaking critical tasks such as lifting and installing heavy objects. Crane outriggers are important components related to the stability and safety of crane operations. When a crane lifts a heavy object, the outriggers increase the contact area with the ground, evenly distributing the weight of the crane and the object, effectively preventing the crane from tipping over and ensuring safe and efficient operation.

[0003] Currently, the lubrication and maintenance of crane outriggers is quite complicated. Due to the frequent extension, retraction, and load-bearing processes, the friction between the moving parts of the outriggers is intense, resulting in severe wear. To ensure their normal operation and service life, lubrication is usually required every 50 to 80 working hours. In harsh working environments, such as high temperature, high dust, and high humidity scenarios, the lubrication frequency may even need to be shortened to once every 20 to 30 hours.

[0004] Commercially available automatic lubrication devices typically rely on electronic detection systems to monitor the working status of outrigger components in real time, or to lubricate them periodically according to a pre-set program, and require a stable power supply to operate normally. Their manufacturing costs are high, encompassing precision electronic components and complex control systems, significantly increasing equipment procurement costs. In harsh environments such as high temperatures, high dust levels, and high humidity at construction sites, electronic components are easily damaged by moisture, and mechanical parts become loose and wear-prone due to frequent vibrations, leading to frequent malfunctions, high maintenance costs, and long repair cycles, severely impacting the normal operating efficiency and service life of cranes. Therefore, there is an urgent need for a new type of crane outrigger lubrication device that does not require electronic detection or power supply to meet the needs of actual engineering operations. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] In view of the shortcomings of the prior art, this utility model provides a crane outrigger that solves the problems mentioned in the background art.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a crane outrigger, comprising a base wall and a telescopic boom, wherein the telescopic boom is movably connected to the interior of the base wall via a straight groove, and an oil box is fixedly connected to the upper side of the interior of the telescopic boom. The oil box contains an oiling mechanism, which includes a spiral spring. A steel cable reel is movably connected to the right side of the spiral spring, and a wave ring is fixedly connected to the right side of the steel cable reel. A passive wave ring contacts the right side of the wave ring, and a piston rod is fixedly connected to the right side of the passive wave ring. A piston shell is fitted onto the outer surface of the piston rod.

[0009] Optionally, a hydraulic telescopic rod is installed inside the foundation wall. A connecting rod is fixedly connected to the extended end of the hydraulic telescopic rod. Telescopic arms are fixedly connected to both ends of the connecting rod. A sliding groove is provided on the side of the telescopic arm. A slider corresponding to the telescopic arm is formed on the inner side of the foundation wall. A support foot is fixedly connected to the right end of the telescopic arm.

[0010] Optionally, the upper end of the oil box is provided with an oil filling port, the telescopic arm is provided with a through hole at the position of the oil filling port, and an oil cap is installed on the top of the oil filling port.

[0011] Optionally, the oil box is provided with an oil pipe on its side, the lower end of the oil pipe enters the interior of the oil box, a conduit is fixedly connected to the upper part of the oil pipe, the other end of the conduit is fixed to the inner side of the telescopic arm, and its outlet is located at the connection between the foundation wall and the telescopic arm.

[0012] Optionally, the left end of the central shaft of the steel rope reel is movably connected to the inside of the oil box, allowing it to rotate around the axis but not move. The center of the spiral spring is fixedly connected to the outer surface of the central shaft. The outer surface of the steel rope reel is wound with steel rope. One end of the steel rope extending out of the oil box is fixedly connected to a fixing box, which is fixed to the inner side of the foundation wall.

[0013] Optionally, the oil box has a space for installing a refueling mechanism inside. A piston spring is fixedly connected to the right side of the passive wave ring, and the inside of the oil box is fixedly connected to the right side of the piston spring. Several wave ring sliders are fixedly connected to the side of the passive wave ring. A wave ring groove is provided inside the oil box at the location corresponding to the wave ring slider, so that the passive wave ring can move left and right but cannot rotate.

[0014] Optionally, the right side of the piston housing is connected to the oil pipe, and the oil pipe is equipped with two one-way valves, located inside the oil pipe on the upper and lower sides of the piston housing, respectively. Both one-way valves open to the upper side, and the oil can only pass through the one-way valves upward.

[0015] (III) Beneficial Effects

[0016] This utility model provides a crane outrigger, which has the following advantages:

[0017] 1. The crane outriggers, through the linkage design of steel ropes, steel rope reels and spiral springs, enable the steel ropes to drive the steel rope reels to rotate and cause the spiral springs to store / release energy during the extension and retraction of the telescopic boom. This converts the linear motion of the telescopic boom into the rotational motion of the steel rope reels, thereby utilizing the kinetic energy of the crane during operation to drive the lubrication device. This achieves the goal of eliminating the need for external power supply and reducing equipment energy consumption and operating costs.

[0018] 2. The crane outrigger lubrication device, through the corrugated surface cooperation structure of the corrugated ring and the passive corrugated ring, converts the rotational motion of the steel cable reel into the reciprocating motion of the passive corrugated ring, which drives the piston rod to perform piston motion in the piston housing. This achieves the function of lubrication on demand according to the extension and retraction of the outrigger, thus avoiding the waste of resources in traditional timed lubrication, improving lubrication efficiency, reducing the frequency of manual maintenance, reducing installation and maintenance costs, and preventing electronic components from being easily damaged in harsh environments. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the oil box of this utility model;

[0021] Figure 3 This is a cross-sectional structural diagram of the oil box of this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram of the refueling mechanism of this utility model.

[0023] Figure 5 This is a schematic diagram of the passive wave ring of this utility model being pushed out to the right.

[0024] In the diagram: 1. Base wall; 2. Telescopic boom; 3. Hydraulic telescopic rod; 4. Connecting rod; 5. Outrigger; 6. Oil box; 7. Filler port; 8. Oil cap; 9. Oil pipe; 10. Guide pipe; 11. Spiral spring; 12. Steel rope reel; 13. Steel rope; 14. Wave ring; 15. Passive wave ring; 16. Piston column; 17. Piston housing; 18. One-way valve; 19. Fixed box; 20. Central shaft; 21. Wave ring slider; 22. Wave ring groove; 23. Piston spring. Detailed Implementation

[0025] 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.

[0026] Example 1

[0027] Please see Figure 1 This utility model provides a technical solution: a crane outrigger, including a base wall 1 and a telescopic boom 2. The telescopic boom 2 is movably connected to the inside of the base wall 1 through a straight groove. An oil box 6 is fixedly connected to the upper side of the inside of the telescopic boom 2. An oil filling mechanism is provided inside the oil box 6. A hydraulic telescopic rod 3 is installed inside the base wall 1. A connecting rod 4 is fixedly connected to the extended end of the hydraulic telescopic rod 3. The telescopic boom 2 is fixedly connected to both ends of the connecting rod 4. A sliding groove is opened on the side of the telescopic boom 2. A slider corresponding to the telescopic boom 2 is formed on the inner side of the base wall 1. A support foot 5 is fixedly connected to the right end of the telescopic boom 2.

[0028] Specifically, suitable straight grooves are opened on the top and sides of the telescopic boom 2 to cooperate with the slider formed inside the base wall 1, ensuring stable linear movement of 1 and 2 during operation. The outriggers 5 are common crane outriggers, which extend by hydraulic means to lift the crane and raise the wheels off the ground, protecting the wheels and forming a larger and more stable support structure.

[0029] Please see Figures 2 to 3 The present invention provides the following technical solution: the upper end of the oil box 6 is provided with an oil filling port 7, the telescopic arm 2 is provided with a through hole at the position of the oil filling port 7, and an oil cap 8 is installed on the top of the oil filling port 7.

[0030] The oil box 6 has an oil pipe 9 on its side. The lower end of the oil pipe 9 enters the interior of the oil box 6. A conduit 10 is fixedly connected to the upper part of the oil pipe 9. The other end of the conduit 10 is fixed to the inner side of the telescopic arm 2, and its outlet is located at the connection between the base wall 1 and the telescopic arm 2.

[0031] Specifically, the oil box 6 is filled with oil through the filling port 7, and the oil cap 8 is used to close the oil to prevent it from being contaminated by the outside. The conduit 10 is installed inside the telescopic arm 2 by a frame or directly fixed inside it, and is kept in a state that bypasses the connecting rod 4. During the extension and retraction of the telescopic arm 2, the conduit 10 remains inside the telescopic arm 2 and is not affected by its movement. The end of the conduit 10 is set at the connection between the base arm 1 and the telescopic arm 2 to achieve point-to-point delivery of lubricating oil.

[0032] Please see Figures 4 to 5 The present invention provides the following technical solution: the refueling mechanism includes a spiral spring 11, a steel rope reel 12 is movably connected to the right side of the spiral spring 11, a wave ring 14 is fixedly connected to the right side of the steel rope reel 12, a passive wave ring 15 is contacted to the right side of the wave ring 14, a piston column 16 is fixedly connected to the right side of the passive wave ring 15, and a piston shell 17 is sleeved on the outer surface of the piston column 16.

[0033] The left end of the central shaft 20 of the steel rope reel 12 is movably connected to the inside of the oil box 6, so that it can rotate around the axis but cannot move. The center of the spiral spring 11 is fixedly connected to the outer surface of the central shaft 20. The outer surface of the steel rope reel 12 is wound with steel rope 13. One end of the steel rope 13 extending out of the oil box 6 is fixedly connected to a fixing box 19. The fixing box 19 is fixed to the inner side of the foundation wall 1.

[0034] The oil box 6 has a space for installing a refueling mechanism inside. A piston spring 23 is fixedly connected to the right side of the passive wave ring 15. The inside of the oil box 6 is fixedly connected to the right side of the piston spring 23. Several wave ring sliders 21 are fixedly connected to the side of the passive wave ring 15. A wave ring groove 22 is provided inside the oil box 6 at the position corresponding to the wave ring slider 21, so that the passive wave ring 15 can move left and right but cannot rotate.

[0035] The piston housing 17 is connected to the oil pipe 9 on the right side. The oil pipe 9 is equipped with two one-way valves 18, which are located inside the oil pipe 9 on the upper and lower sides of the piston housing 17, respectively. Both one-way valves 18 open to the upper side, and the oil can only pass through the one-way valves 18 upwards.

[0036] Specifically, the outer end of the spiral spring 11 is fixedly connected to the outer shell and the oil box 6, while the inner end is connected to the central shaft 20, thus storing energy when the central shaft 20 rotates. The right side of the wave ring 14 is a wave surface, and the left side of the passive wave ring 15 is a wave surface. Since the passive wave ring 15 is restricted from rotation by the wave ring slider 21 and the wave ring groove 22, it can only slide axially. When the crests (or troughs) of the two wave surfaces coincide, the passive wave ring 15 reaches its right (or left) limit position, forming a periodic displacement. The steel cable 13 is located near the side arm of the telescopic arm 2, and the fixing box 19 is located on the side of the corresponding base arm 1. Therefore, the steel cable 13 is installed close to the sides of the two arms and will not contact the connecting rod 4.

[0037] During the operation of the crane outriggers, the outriggers extend or retract the telescopic boom 2 via the hydraulic telescopic rod 3. The outriggers 5 then contact the ground through the supporting structure to complete the overall support of the crane. During the extension or retraction of the telescopic boom 2, one end of the steel cable 13 is fixed to the foundation wall 1 via the fixing box 19, and the other end is fixed to the telescopic boom 2 via the oil box 6. When the telescopic boom 2 moves outward, the steel cable 13 is pulled, causing the steel cable reel 12 to rotate. At this time, the spiral spring 11 is stretched and stores energy. When the telescopic boom 2 retracts inward, the spiral spring 11 releases its elastic potential energy, driving the steel cable reel 12 to rotate in the opposite direction, thus achieving automatic winding of the steel cable 13. This ensures that the steel cable reel 12 rotates accordingly regardless of whether the telescopic boom 2 moves inward or outward. The rotation of the steel cable reel 12 drives the wave ring 14 to rotate. When the wave ring 14 rotates, its right-side wave surface contacts the left-side wave surface of the passive wave ring 15. Since the passive wave ring 15 is restricted from rotation by 21 and 22, the wave ring 14 pushes the passive wave ring 15 to the right, and then resets it via the piston spring 23. When the crests of the two waves correspond, the passive wave ring 15 is at the rightmost end; when one crest corresponds to another trough, the passive wave ring 15 is at the leftmost end. This converts the rotation of the wave ring 14 into the reciprocating motion of the passive wave ring 15, thereby driving the piston rod 16 to move within the piston housing 17. Furthermore, regardless of the displacement of the telescopic arm 2, it is converted into a proportional displacement of the piston rod 16 through the wave ring 14 and the passive wave ring 15, ensuring a response even with small displacements of the telescopic arm 2. Because the oil pipe 9 is equipped with a one-way valve 18, the piston movement of the piston rod 16 draws oil from the lower oil box 6 and discharges it from the top. Finally, the fluid flows into the conduit 10 and into the connection between the foundation wall 1 and the telescopic boom 2, thereby converting the linear motion of the telescopic boom 2 into periodic hydraulic supply. This ensures that critical hinge parts are automatically lubricated during the extension and retraction of the crane outriggers, effectively reducing the frequency of manual maintenance and lowering the installation and maintenance costs of the device.

[0038] In summary, this crane outrigger, through the linkage design of steel cable 13, steel cable reel 12, and spiral spring 11, allows the steel cable 13 to drive the steel cable reel 12 to rotate and the spiral spring 11 to store / release energy during the extension and retraction of the telescopic boom 2. This converts the linear motion of the telescopic boom 2 into the rotational motion of the steel cable reel 12, effectively utilizing the kinetic energy of the crane during operation to drive the lubrication device. This achieves the goal of eliminating the need for external power supply and reducing equipment energy consumption and operating costs. The crane outrigger lubrication device, through the corrugated surface mating structure of the corrugated ring 14 and the passive corrugated ring 15, converts the rotational motion of the steel cable reel 12 into the reciprocating motion of the passive corrugated ring 15, driving the piston rod 16 to perform piston movement within the piston housing 17. This provides on-demand lubrication based on the outrigger's extension and retraction, avoiding the resource waste of traditional timed lubrication, improving lubrication efficiency, reducing the frequency of manual maintenance, lowering installation and maintenance costs, and preventing damage to electronic components in harsh environments.

[0039] 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 crane outrigger, comprising a base wall (1) and a telescopic boom (2), characterized in that: The interior of the base wall (1) is movably connected to a telescopic arm (2) via a straight groove. An oil box (6) is fixedly connected to the upper side of the interior of the telescopic arm (2). An oil filling mechanism is provided inside the oil box (6). The oil filling mechanism includes a spiral spring (11). A steel rope reel (12) is movably connected to the right side of the spiral spring (11). A wave ring (14) is fixedly connected to the right side of the steel rope reel (12). A passive wave ring (15) contacts the right side of the wave ring (14). A piston column (16) is fixedly connected to the right side of the passive wave ring (15). A piston shell (17) is sleeved on the outer surface of the piston column (16).

2. The outrigger for a crane according to claim 1, characterized in that: A hydraulic telescopic rod (3) is installed inside the base wall (1). A connecting rod (4) is fixedly connected to the extended end of the hydraulic telescopic rod (3). Telescopic arms (2) are fixedly connected to both ends of the connecting rod (4). A sliding groove is provided on the side of the telescopic arm (2). A slider corresponding to the telescopic arm (2) is formed on the inner side of the base wall (1). A support foot (5) is fixedly connected to the right end of the telescopic arm (2).

3. A crane outrigger according to claim 1, characterized in that: The oil box (6) has an oil filling port (7) at its upper end. The telescopic arm (2) has a through hole at the position of the oil filling port (7). An oil cap (8) is installed on the top of the oil filling port (7).

4. A crane outrigger according to claim 1, characterized in that: The oil box (6) has an oil pipe (9) on its side. The lower end of the oil pipe (9) enters the interior of the oil box (6). A conduit (10) is fixedly connected to the upper part of the oil pipe (9). The other end of the conduit (10) is fixed to the inner side of the telescopic arm (2), and its outlet is located at the connection between the base wall (1) and the telescopic arm (2).

5. A crane outrigger according to claim 1, characterized in that: The left end of the central shaft (20) of the steel rope reel (12) is movably connected to the inside of the oil box (6), so that it can rotate around the axis but cannot move. The center of the spiral spring (11) is fixedly connected to the outer surface of the central shaft (20). The outer surface of the steel rope reel (12) is wound with steel rope (13). One end of the steel rope (13) extending out of the oil box (6) is fixedly connected to a fixing box (19). The fixing box (19) is fixed to the inner side of the foundation wall (1).

6. A crane outrigger according to claim 1, characterized in that: The oil box (6) has a space for installing a refueling mechanism inside. A piston spring (23) is fixedly connected to the right side of the passive wave ring (15). The inside of the oil box (6) is fixedly connected to the right side of the piston spring (23). Several wave ring sliders (21) are fixedly connected to the side of the passive wave ring (15). A wave ring groove (22) is provided inside the oil box (6) at the place corresponding to the wave ring slider (21), so that the passive wave ring (15) can move left and right but cannot rotate.

7. A crane outrigger according to claim 1, characterized in that: The piston housing (17) is connected to the oil pipe (9) on the right side. The oil pipe (9) is equipped with two one-way valves (18), which are located inside the oil pipe (9) on the upper and lower sides of the piston housing (17). The one-way valves (18) are open to the upper side, and the oil can only pass through the one-way valves (18) upward.

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