Novel supporting leg structure and crane thereof

Abstract

The invention discloses a novel landing leg structure and a crane thereof. The novel landing leg structure comprises a fixed landing leg, a first-section movable landing leg, a second-section movable landing leg, a vertical oil cylinder, a horizontal oil cylinder and a third-stage landing leg, the three-stage supporting leg comprises a vertical oil cylinder and a three-section supporting leg, and the vertical oil cylinder of the three-stage supporting leg is independently assembled or assembled after being disassembled and assembled from an original supporting leg mechanism. By assembling the three-stage supporting leg mechanism, the purpose of increasing the span of the supporting legs is achieved; the problem that the span of supporting legs is limited due to the width of a vehicle is solved by adding a three-section supporting leg structure; meanwhile, the three-level supporting leg structure technology can be achieved under the condition that the height of an existing supporting leg box is not changed, and the problem that the height of the supporting leg is limited is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cranes, in particular to a novel outrigger structure and a crane thereof. BACKGROUND

[0002] A crane is a heavy machinery widely used in construction, logistics transportation and industrial fields, and the outrigger part is an important supporting structure for the stability and safety of the crane. The main function of the outrigger of the crane is to bear the weight of the crane itself and the hoisted heavy objects, and at the same time to expand the supporting area of the crane and enhance the stability of the equipment during operation, so as to prevent the risk of overturning due to the shift of the center of gravity or uneven ground.

[0003] During the operation of the crane, the performance of the outrigger directly affects the carrying capacity and operation efficiency of the crane. In particular, the outrigger span plays an important role in the operation stability of the crane. However, the outrigger span is limited by the vehicle width and the form of the outrigger mechanism. Taking a 3m vehicle width product with H-type outrigger as an example, in order to meet the requirements of national standards, the vehicle design width is 2.98m, and the maximum transverse span in the crane industry is 9.6m, and the length of one outrigger is 2.937m, which is basically close to the vehicle width. In the case of constant outrigger length, if the span is to be increased, the overlap must be reduced, which has a great impact on the stress of the outrigger.

[0004] Prior art 1 such as "a three-stage telescopic outrigger device and an aerial work platform" (CN202211424785.6) uses a zipper transmission mechanism and a hydraulic assembly to realize the telescopic function of the three-stage outrigger.

[0005] Prior art 2 such as "a three-stage telescopic outrigger structure of a truck-mounted crane" (CN201220422117.5) uses two oil cylinders and a rope arrangement mechanism to realize the telescopic function of the three-stage outrigger.

[0006] The H-type two-stage outrigger product of prior art 3 has the outrigger in the fully retracted state when the vehicle is running, and the outrigger in the fully extended state when the crane is operating. The outrigger mechanism includes a fixed outrigger, one movable outrigger, two movable outriggers, a vertical oil cylinder, a horizontal oil cylinder and other parts. The size L is the half span of the product, and the larger the L, the better the stability of the product during hoisting operation.

[0007] The larger the outrigger span of the crane, the better the stability of the hoisting operation, so the outrigger span will be as large as possible during the design of the crane product. Due to the requirements of national standards on vehicle width, the outrigger cannot exceed the vehicle width after being fully retracted, so as to ensure that the vehicle can run on the road. Therefore, the prior arts 1-3 have the following shortcomings:

[0008] (1) In the case of unchanged vehicle width, the leg span has basically reached the maximum state. If you want to increase the leg span without changing the leg structure, you can only reduce the lap length, that is, increase the extension length of each leg section, but this will cause the leg square box to bear a large force, which is not conducive to product design, and the length of the increased span is limited. Considering the weight, cost and performance of the leg, it is not the best solution.

[0009] (2) In order to realize the three-stage leg extension function, the oil cylinder, rope row and other mechanisms need to be arranged inside the leg box to realize the extension function, and the leg box needs a certain height space. This is relatively easy to achieve by increasing the height of the box for vehicles with small leg load and small leg box height. However, for large-tonnage products, the leg load is large, and the box height is high. It is difficult to achieve three-stage leg extension function by increasing the height of the box due to the limitation of vehicle height space.

[0010] Therefore, it is necessary to develop a new leg structure and its crane to overcome the above problems. SUMMARY

[0011] The purpose of the present application is to overcome the shortcomings and defects of the prior art. The present application provides a new leg structure and its crane, which realizes the purpose of increasing the leg span by assembling a three-stage leg mechanism. The problem of limited vehicle width span is solved by increasing the three-stage leg structure technology. The three-stage leg structure technology can be realized without changing the height of the existing leg box, solving the problem of limited leg height.

[0012] Technical scheme: The new leg structure of the present application comprises a fixed leg, a one-stage movable leg, a two-stage movable leg, a vertical oil cylinder, a horizontal oil cylinder and a three-stage leg. The three-stage leg comprises a vertical oil cylinder and three-stage legs. The vertical oil cylinder of the three-stage leg is independently assembled or assembled after being disassembled from the original leg mechanism.

[0013] Among them, the two-stage leg lap block I of the two-stage movable leg is a half-span state lap block, and the two-stage leg lap block II of the two-stage movable leg is a 75% span state lap block.

[0014] Among them, when the three-stage leg is assembled, the leg lengthening block II and the leg lengthening block I of the three-stage leg are matched and connected with the two-stage leg lap block I and the two-stage leg lap block II of the two-stage movable leg respectively, and the force is transmitted during the lifting operation.

[0015] Among them, when the three-stage leg is assembled, the leg is positioned by the leg pin, and the gap between the legs is adjusted by adjusting the bolt combination. The leg pin and the mounting hole are the original structure of the two-stage movable leg.

[0016] The fixed branch leg is connected with a movable branch leg through a horizontal oil cylinder.

[0017] The movable branch leg is connected with a two-section movable branch leg.

[0018] The two-section movable branch leg is connected with a vertical oil cylinder.

[0019] The three-section branch leg is connected with the two-section movable branch leg.

[0020] The crane of the application is characterized in that the novel branch leg structure is used.

[0021] Compared with the prior art, the application has the following advantages: the application can increase the branch leg span without changing the original branch leg structure (prior art 3), thereby improving the stability of the vehicle in the lifting operation. In the state of not changing the original technology (prior art 3), the lateral span of the vehicle is greatly improved through the gapless cooperation between the overlapping blocks, thereby improving the lifting performance and operation stability of the crane and greatly meeting the customer demand. The original technology itself can meet the demand of the lifting performance of the vehicle, and the vehicle does not need to carry the three-section branch leg in the atypical working condition, thereby reducing the operation cost. The original branch leg vertical cylinder can be reused in the three-section branch leg, thereby reducing the customer procurement cost. The assembly structure is simple, convenient and fast, and conforms to the humanized design. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of the full retracted state of the branch leg structure of the prior art 3.

[0023] Figure 2 It is a structure schematic view of the full extended state of the branch leg structure of the prior art 3.

[0024] Figure 3 It is a structure schematic view of the application.

[0025] Figure 4 It is an A-A sectional view of the application.

[0026] Figure 5 It is a structure schematic view of the three-section branch leg of the application.

[0027] In the figure, 1 is a fixed branch leg, 2 is a one-section movable branch leg, 3 is a two-section movable branch leg, 4 is a vertical oil cylinder, 5 is a horizontal oil cylinder, 6 is a two-section branch leg overlapping block I, 7 is a two-section branch leg overlapping block II, 8 is a branch leg lengthening section overlapping block I, 9 is a branch leg lengthening section overlapping block II, 10 is a three-section branch leg, 11 is a three-section branch leg, 12 is a branch leg pin, and 13 is an adjusting bolt combination. DETAILED DESCRIPTION

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

[0029] The outrigger mechanism of the present invention is a mechanism for crane lifting operations. It is not only an important load-bearing mechanism of the crane, but also a guarantee for the safe operation of the crane. Its design and use directly affect the performance and safety of the crane.

[0030] like Figure 1 , 2 The existing H-type double-stage outrigger product (technology 3) has its outriggers fully retracted when the vehicle is in motion and fully extended when the crane is operating. The outrigger mechanism includes several parts such as a fixed outrigger 1, a single movable outrigger 2, a second movable outrigger 3, a vertical hydraulic cylinder 4, and a horizontal hydraulic cylinder 5. The dimension L is the product's half-span; the larger L is, the better the product's stability during lifting operations.

[0031] The novel outrigger structure of this invention includes a fixed outrigger 1, a single movable outrigger 2, a second movable outrigger 3, a vertical hydraulic cylinder 4, a horizontal hydraulic cylinder 5, and a third-stage outrigger 10. The third-stage outrigger 10 includes the vertical hydraulic cylinder 4 and a three-section outrigger 11. The vertical hydraulic cylinder 4 of the third-stage outrigger 10 can be assembled independently or disassembled from the original outrigger mechanism and then assembled. The second-section outrigger overlap block I6 of the second movable outrigger 3 is a half-extension span overlap block, and the second-section outrigger overlap block II7 of the second movable outrigger 3 is a 75% span overlap block. During assembly of the third-stage outrigger 10, the outrigger extension section overlap blocks II9 and I8 of the third-section outrigger 11 are respectively matched and connected to the second-section outrigger overlap blocks I6 and II7 of the second movable outrigger 3 to transmit force during lifting operations. During assembly of the three-stage outrigger 10, the outrigger is positioned by the outrigger pin 12 and the outrigger gap is adjusted by the adjusting bolt assembly 13. The outrigger pin 12 and the mounting hole are the original structure of the two-section movable outrigger 3.

[0032] The fixed support leg 1 of this invention is connected to a movable support leg 2 via a horizontal hydraulic cylinder 5. The movable support leg 2 is connected to a second movable support leg 3. The second movable support leg 3 is connected to a vertical hydraulic cylinder 4. The third support leg 11 is connected to the second movable support leg 3.

[0033] like Figure 3 It can be seen that L1 is the new span after adding the third-level outrigger 10. With this structural form, the span is not limited by the vehicle width, and L1 can be increased significantly.

[0034] This invention, without altering the original technology, significantly increases the lateral span of the vehicle by adding three outrigger sections, thereby improving the crane's lifting capacity and operational stability, greatly meeting customer needs. During lifting operations, the three outrigger sections transmit force through the original overlapping block structure without changing the original technology; its innovative structure is novel.

Claims

1. A novel support leg structure, characterized in that: It includes a fixed support leg (1), a movable support leg (2), a movable support leg (3), a vertical cylinder (4), a horizontal cylinder (5), and a three-stage support leg (10); the three-stage support leg (10) includes a vertical cylinder (4) and a three-stage support leg (11), and the vertical cylinder (4) of the three-stage support leg (10) is either assembled independently or disassembled from the original support leg mechanism and then assembled.

2. The novel support leg structure according to claim 1, characterized in that: The two-section movable outrigger (3) has a two-section outrigger overlap block I (6) in a half-stretch span state, and a two-section outrigger overlap block II (7) in a 75% span state.

3. The novel support leg structure according to claim 2, characterized in that: When the three-stage outrigger (10) is assembled, the outrigger extension section lap block II (9) and outrigger extension section lap block I (8) in the three-section outrigger (11) are matched and connected with the two-section outrigger lap block I (6) and two-section outrigger lap block II (7) of the two-section movable outrigger (3) to transmit force during the lifting operation.

4. The novel support leg structure according to claim 1, characterized in that: When assembling the three-stage outrigger (10), the outrigger is positioned by the outrigger pin (12), and the gap between the outriggers is adjusted by the adjusting bolt assembly (13). The outrigger pin (12) and the mounting hole are the original structure of the two-section movable outrigger (3).

5. The novel support leg structure according to claim 1, characterized in that: The fixed support leg (1) is connected to a movable support leg (2) via a horizontal hydraulic cylinder (5).

6. The novel support leg structure according to claim 5, characterized in that: The first movable leg (2) is connected to the second movable leg (3).

7. The novel support leg structure according to claim 6, characterized in that: The two movable support legs (3) are connected to the vertical hydraulic cylinder (4).

8. The novel support leg structure according to claim 1, characterized in that: The three-section support leg (11) is connected to the two-section movable support leg (3).

9. A crane, characterized in that: The novel support leg structure used in any one of claims 1-8.

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