Landing leg with horizontal telescopic hinged structure

Abstract

The invention discloses a supporting leg with a horizontal telescopic hinged structure, which is characterized in that a fixed supporting leg and a movable supporting leg are arranged on a frame, the movable supporting leg is connected with a horizontal oil cylinder, the horizontal oil cylinder pushes the movable supporting leg to telescopically move in a box type of the fixed supporting leg to reach the required transverse span, and the end part of the movable supporting leg is connected with a vertical oil cylinder; the fixed supporting leg and the movable supporting leg are connected through an upper pin shaft and a lower pin shaft. The movable supporting leg disclosed by the invention can realize first telescoping and then hinging, and breaks through the span limitation of the existing supporting leg structure on the basis of ensuring that the width of the vehicle and the length of the movable supporting leg are not increased and the bearing performance is not reduced, so that the supporting leg structure can further increase the transverse span of the whole vehicle, and the hoisting capacity of the crane is effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of cranes, and particularly to a horizontally telescopic articulated structure outrigger. Background Art

[0002] Mobile cranes are generally equipped with four movable outriggers. During lifting operations, the four outriggers extend to support the entire crane and bear all the weight during the lifting operation of the crane. To improve the stability of the crane during lifting, it is necessary to increase the outrigger span, which requires increasing the length of the movable outriggers. Since relevant regulations have strict restrictions on the overall width of mobile cranes, this restricts the further increase of the outrigger span.

[0003] The existing movable outrigger structure of wheeled cranes, such as the double-pole telescopic outrigger introduced in Patent US14165861, includes a fixed outrigger, a movable outrigger, a horizontal oil cylinder, and a vertical oil cylinder. Among them, the fixed outrigger and the vehicle frame are generally connected by welding; the movable outrigger is of a box structure and is nested inside the fixed outrigger; to increase the outrigger span, the movable outrigger consists of two freely telescopic movable outrigger sections. The horizontal oil cylinder is used to push the movable outrigger to telescopic movement inside the fixed outrigger box; the vertical oil cylinder is used to support the whole vehicle off the ground. During lifting operations, the movable outrigger extends outside the fixed outrigger box; during the driving state, the movable outrigger retracts inside the fixed outrigger box to ensure that the vehicle does not exceed the width limit. After the movable outrigger is fully extended, its lateral span is a1; to ensure the reliability of the structural members, a lap length b1 must be reserved between the movable outrigger and the fixed outrigger, and a lap length b2 must be reserved between the movable outriggers.

[0004] However, the prior art has the following problems: 1. Without changing the lap lengths b1 and b2, the lateral span of the outrigger is increased by increasing the length of the movable outrigger. However, due to the restrictions of regulations on the overall width of mobile cranes, the length of the movable outrigger cannot be continuously increased, thus limiting the further increase of the lateral span. 2. Without changing the length of the movable outrigger, the lateral span of the outrigger is increased by shortening the lap lengths b1 and b2. However, this method will increase the load borne by the movable outrigger and increase the probability of reliability risks of the structural members.

[0005] Therefore, it is necessary to develop a new type of outrigger structure specifically to enable the outrigger to obtain a larger lateral span without reducing the performance of other structures. Summary of the Invention

[0006] Objective of the Invention: Aiming at the deficiencies and defects of the prior art, the present invention provides a horizontally telescopic articulated structure leg. This movable leg can first telescope and then articulate. On the basis of ensuring that the vehicle width and the length of the movable leg do not increase while the load-bearing performance does not decrease, it breaks through the span limit of the existing leg structure, enabling the leg structure to further increase the lateral span of the whole vehicle, thereby effectively improving the lifting capacity of the crane.

[0007] Technical Solution: A horizontally telescopic articulated structure leg of the present invention is characterized in that: a fixed leg and a movable leg are provided on the vehicle frame. The movable leg is connected to a horizontal oil cylinder. The horizontal oil cylinder pushes the movable leg to telescopic movement within the fixed leg box to reach the required lateral span. The end of the movable leg is connected to a vertical oil cylinder. The fixed leg and the movable leg are connected by an upper pin shaft and a lower pin shaft.

[0008] Among them, the fixed leg includes a fixed leg main structure, an upper pin shaft connecting plate, a lower pin shaft connecting plate, an upper lapping block and a lower lapping block.

[0009] Among them, the fixed leg main structure is a box structure; the upper pin shaft connecting plate and the lower pin shaft connecting plate are the load-bearing parts of the fixed leg. After the movable leg is fully extended, the two round holes on the upper pin shaft connecting plate and the lower pin shaft connecting plate are respectively used to connect the upper pin shaft and the lower pin shaft.

[0010] Among them, the upper stepped plane above the upper pin shaft connecting plate and the lower pin shaft connecting plate, the upper lapping block and the lower lapping block are the load-bearing parts of the leg under the non-full extension span.

[0011] Among them, the movable leg includes a first-stage leg and a second-stage leg. The first-stage leg includes an upper pin shaft connection hole, a lower pin shaft connection hole and a reinforcing plate.

[0012] Among them, the upper pin shaft connection hole and the lower pin shaft connection hole are the load-bearing parts after the movable leg is fully extended, and are respectively used to connect the upper pin shaft and the lower pin shaft after the movable leg is fully extended.

[0013] Among them, the reinforcing plate is fixed outside the connection hole of the first-stage leg by welding. There are chamfers on both sides of the reinforcing plate, which play a guiding role when telescoping to the upper pin shaft connecting plate and the lower pin shaft connecting plate, and can increase the stress area between the movable leg and the upper pin shaft and the lower pin shaft, reducing the gap between the movable leg and the upper pin shaft connecting plate and the lower pin shaft connecting plate.

[0014] Among them, after the movable leg is fully extended, the upper pin shaft and the lower pin shaft are used to connect the fixed leg and the movable leg, playing a role in load-bearing and force transmission.

[0015] Non-full extension state: The horizontal oil cylinder extends outwards, driving the movable outrigger to the required position. At this time, the upper pin shaft and the lower pin shaft are not installed and do not participate in bearing. When the crane is hoisting, the upper pin shaft connecting plate, the lower pin shaft connecting plate, the upper lapping block and the lower lapping block of the fixed outrigger are in direct contact with the main structure of the movable outrigger, playing a role in bearing force transmission.

[0016] Full extension state: The horizontal oil cylinder extends outwards completely, driving the movable outrigger to the outermost end. The upper pin shaft and the lower pin shaft are installed, and the two pin shafts participate in bearing. At this time, the force on the vertical direction of the contact surface between the fixed outrigger and the movable outrigger is changed to the force on the horizontal direction connected by the pin shafts. With the increase of the height of the outrigger box, the distance between the upper pin shaft and the lower pin shaft can be increased to improve the force conditions of the fixed outrigger, the movable outrigger and the pin shafts. At this time, the transverse span of the outrigger reaches the maximum value a2, and a2 > a1.

[0017] A crane, characterized in that: the outrigger with the horizontal telescopic hinge structure of the present invention is used.

[0018] Beneficial effects: Compared with the prior art, the present invention has the following remarkable advantages: Without reducing the performance of other structures, the present invention enables the outrigger to obtain a larger transverse span without increasing the vehicle width; it meets the requirements of relevant regulations for the overall width of the crane, effectively improves the transverse span of the whole vehicle, and enhances the hoisting stability of the whole vehicle; after the outrigger is fully extended, the movable outrigger and the fixed outrigger are connected by pin shafts, with strong bearing capacity and higher reliability. Description of the Drawings

[0019] Figure 1 Structural schematic diagram of the movable outrigger structure of the prior art Figure 1 ;

[0020] Figure 2 Structural schematic diagram of the movable outrigger structure of the prior art Figure 2 ;

[0021] Figure 3 Structural schematic diagram of the present invention;

[0022] Figure 4 Structural schematic diagram of the horizontal oil cylinder of the present invention;

[0023] Figure 5 Structural schematic diagram of the installation structure of the present invention;

[0024] Figure 6 Structural schematic diagram of the fixed outrigger of the present invention;

[0025] Figure 7 Structural schematic diagram of the movable outrigger of the present invention;

[0026] Figure 8 Structural schematic diagram of one section of the outrigger of the present invention;

[0027] In the figure, 1 is the vehicle frame; 2 is the fixed support leg; 21 is the main structure of the fixed support leg; 22 is the upper pin connection plate; 23 is the lower pin connection plate; 24 is the upper overlapping block; 25 is the lower overlapping block; 3 is the movable support leg; 31 is the first-stage support leg; 32 is the second-stage support leg; 311 is the upper pin connection hole; 312 is the lower pin connection hole; 313 is the reinforcing plate; 4 is the horizontal oil cylinder; 5 is the vertical oil cylinder; 6 is the upper pin; 7 is the lower pin. Specific embodiments

[0028] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] The lateral span of the support legs of the present invention: the left-right lateral distance at the center of the four support leg support points of the crane.

[0030] As Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8 For example, in the horizontally telescopic articulated structure support legs of the present invention, a fixed support leg 2 and a movable support leg 3 are provided on the vehicle frame 1. The movable support leg 3 is connected to the horizontal oil cylinder 4. The horizontal oil cylinder 4 pushes the movable support leg 3 to telescopically move within the box of the fixed support leg 2 to reach the required lateral span. The end of the movable support leg 3 is connected to the vertical oil cylinder 5. The fixed support leg 2 and the movable support leg 3 are connected by an upper pin 6 and a lower pin 7.

[0031] The fixed support leg 2 includes a main structure 21 of the fixed support leg, an upper pin connection plate 22, a lower pin connection plate 23, an upper overlapping block 24 and a lower overlapping block 25. The main structure 21 of the fixed support leg is a box structure; the upper pin connection plate 22 and the lower pin connection plate 23 are the load-bearing parts of the fixed support leg. After the movable support leg 3 is fully extended, the two round holes on the upper pin connection plate 22 and the lower pin connection plate 23 are respectively used to connect the upper pin 6 and the lower pin 7. The stepped planes above the upper pin connection plate 22 and the lower pin connection plate 23, and the upper overlapping block 24 and the lower overlapping block 25 are the load-bearing parts of the support legs at non-full extension spans.

[0032] The movable outrigger 3 includes a first-stage outrigger 31 and a second-stage outrigger 32. The first-stage outrigger 31 includes an upper pin connection hole 311, a lower pin connection hole 312, and a reinforcing plate 313. The upper pin connection hole 311 and the lower pin connection hole 312 are the load-bearing parts after the movable outrigger 3 is fully extended, and are respectively used to connect the upper pin 6 and the lower pin 7 after the movable outrigger 3 is fully extended. The reinforcing plate 313 is fixed outside the connection hole of the first-stage outrigger 31 by welding. There are chamfers on both sides of the reinforcing plate 313, which play a guiding role when telescoping to the upper pin connection plate 22 and the lower pin connection plate 23, and can increase the force-bearing area between the movable outrigger 3 and the upper pin 6 and the lower pin 7, and reduce the gap between the movable outrigger 3 and the upper pin connection plate 22 and the lower pin connection plate 23. After the movable outrigger 3 is fully extended, the upper pin 6 and the lower pin 7 are used to connect and fix the fixed outrigger 2 and the movable outrigger 3, playing a role in load-bearing and force transmission.

[0033] Non-fully extended state: The horizontal oil cylinder 4 extends outwards, driving the movable outrigger 3 to the required position. At this time, the upper pin 6 and the lower pin 7 are not installed and do not participate in load-bearing; during the crane's hoisting operation, the upper pin connection plate 22, the lower pin connection plate 23, the upper overlapping block 24, and the lower overlapping block 25 of the fixed outrigger 2 are in direct contact with the main structure of the movable outrigger 3, playing a role in load-bearing and force transmission;

[0034] Fully extended state: The horizontal oil cylinder 4 extends outwards completely, driving the movable outrigger 3 to the outermost end. The upper pin 6 and the lower pin 7 are installed, and the two pins participate in load-bearing. At this time, the force on the fixed outrigger 2 and the movable outrigger 3 changes from the vertical direction of the original contact surface to the horizontal direction of connection through the pins; as the height of the outrigger box increases, the distance between the upper pin 6 and the lower pin 7 can be increased to improve the force conditions of the fixed outrigger 2, the movable outrigger 3, and the pins; at this time, the lateral span of the outrigger reaches the maximum value a2, and a2 > a1.

[0035] The upper pin and the lower pin of the present invention can be short shafts with pins on both sides, or long shafts with pins from one end to the other end; the pins can be manually installed, or can be automatically or semi-automatically installed through the control of an oil cylinder or a motor, etc.

[0036] The mounting holes on both sides of the fixed outrigger door panel and the movable outrigger web of the present invention are connected by a connecting shaft, changing the force-bearing mode of the outrigger support in the prior art, and enabling large-span support to be achieved. While not reducing the performance of other structures, the present invention enables the outrigger to obtain a larger lateral span without increasing the vehicle width; it meets the requirements of relevant regulations for the overall width of the crane, and at the same time effectively improves the lateral span of the whole vehicle and the hoisting stability of the whole vehicle; after the outrigger is fully extended, the movable outrigger and the fixed outrigger are connected by pins, with strong load-bearing capacity and higher reliability.

Claims

1. A horizontal telescopic hinged structure leg, characterized in that: A fixed leg (2) and a movable leg (3) are provided on the vehicle frame (1); the movable leg (3) is connected to a horizontal oil cylinder (4); the horizontal oil cylinder (4) pushes the movable leg (3) to telescope in the box of the fixed leg (2) to achieve a required lateral span; the end of the movable leg (3) is connected to a vertical oil cylinder (5); the fixed leg (2) and the movable leg (3) are connected via an upper pin shaft (6) and a lower pin shaft (7).

2. The horizontal telescopic hinged structure leg according to claim 1, characterized in that: The fixed leg (2) comprises a fixed leg main structure (21), an upper pin shaft connecting plate (22), a lower pin shaft connecting plate (23), an upper overlapping block (24) and a lower overlapping block (25).

3. The horizontal telescopic hinged structure leg according to claim 2, characterized in that: The fixed leg main structure (21) is a box-type structure; the upper pin shaft connecting plate (22) and the lower pin shaft connecting plate (23) are the bearing parts of the fixed leg. After the movable leg (3) is fully extended, the two circular holes on the upper pin shaft connecting plate (22) and the lower pin shaft connecting plate (23) are respectively used to connect the upper pin shaft (6) and the lower pin shaft (7).

4. The horizontal telescopic hinged structure leg according to claim 3, characterized in that: The stepped planes above the upper pin shaft connecting plate (22) and the lower pin shaft connecting plate (23), the upper overlapping block (24) and the lower overlapping block (25) are the bearing parts of the supporting legs under the non-fully extended span.

5. The horizontal telescopic hinged structure leg according to claim 1, characterized in that: The movable supporting leg (3) comprises a first supporting leg (31) and a second supporting leg (32), wherein the first supporting leg (31) comprises an upper pin shaft connecting hole (311), a lower pin shaft connecting hole (312) and a reinforcing plate (313).

6. The horizontal telescopic hinged structure leg according to claim 5, characterized in that: The upper pin shaft connection hole (311) and the lower pin shaft connection hole (312) are the bearing parts after the movable leg (3) is fully extended, and are used to connect the upper pin shaft (6) and the lower pin shaft (7) respectively after the movable leg (3) is fully extended.

7. The horizontal telescopic hinged structure leg according to claim 6, characterized in that: The reinforcing plate (313) is fixed to the outside of the connecting hole of a leg section (31) by welding. Both sides of the reinforcing plate (313) are chamfered. When the reinforcing plate (313) is extended to the upper pin connecting plate (22) and the lower pin connecting plate (23), it plays a guiding role and can increase the force-bearing area of ​​the movable leg (3) and the upper pin (6) and the lower pin (7), thereby reducing the gap between the movable leg (3) and the upper pin connecting plate (22) and the lower pin connecting plate (23).

8. The horizontal telescopic hinged structure leg according to claim 7, characterized in that: After the movable leg (3) is fully extended, the upper pin shaft (6) and the lower pin shaft (7) are used to connect the fixed leg (2) and the movable leg (3) to play a role in bearing and transmitting force.

9. The horizontal telescopic hinged structure leg according to any one of claims 1 to 8, characterized in that: In the non-fully extended state: the horizontal oil cylinder (4) extends outwards, driving the movable leg (3) to reach the desired position. At this time, the upper pin shaft (6) and the lower pin shaft (7) are not installed and do not participate in the load-bearing. When the crane is lifting, the upper pin shaft connecting plate (22), the lower pin shaft connecting plate (23), the upper lap block (24) and the lower lap block (25) of the fixed leg (2) are in direct contact with the main structure of the movable leg (3), playing a role in load-bearing and force transmission. Full extension state: the horizontal oil cylinder (4) is fully extended outward, driving the movable leg (3) to the outermost end, installing the upper pin shaft (6) and the lower pin shaft (7), and the two pin shafts participate in the load-bearing. At this time, the fixed leg (2) and the movable leg (3) are changed from being subjected to force in the vertical direction of the original contact surface to being subjected to force in the horizontal direction connected by the pin shaft; as the leg box type increases, the distance between the upper pin shaft (6) and the lower pin shaft (7) can be increased, improving the force conditions of the fixed leg (2), the movable leg (3) and the pin shaft; at this time, the lateral span of the leg reaches the maximum value a2, and a2>a1.

10. A crane, characterized in that: Use the horizontal telescopic hinged structure leg described in any one of claims 1-8.

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