A telescopic hinged leg structure

Abstract

The application discloses a telescopic hinged support leg structure, which comprises a fixed support leg, a movable support leg nested in the fixed support leg, a horizontal oil cylinder for pushing the movable support leg to move horizontally, a hinged assembly installed in the movable support leg, a hinged hole for the hinged assembly to extend out of the movable support leg, and a connecting hole corresponding to the position of the hinged hole on the fixed support leg; when the movable support leg extends out of the fixed support leg and reaches a set position, the hinged assembly extends out of the hinged hole and into the connecting hole to hinge the fixed support leg and the movable support leg. The hinged assembly is used for hinging the completely extended movable support leg and fixed support leg, thereby improving the stability of the connection between the movable support leg and the fixed support leg; compared with the lap joint mode, the required connection length of the movable support leg and the fixed support leg is shortened, the lateral span of the crane support leg is effectively increased without increasing the length of the movable support leg; the hinged assembly is arranged in the box-shaped structure of the movable support leg, does not occupy extra space, and is simple in structure and convenient to operate.

Description

TECHNICAL FIELD

[0001] The present application relates to the crane technology field, especially to a telescopic hinged outrigger structure. BACKGROUND

[0002] Mobile crane is generally equipped with four movable outriggers, when lifting operation, four outriggers are extended to support the whole crane, and bear the whole weight of the crane during lifting operation. Figure 1 and Figure 2 As shown in the drawings, the existing movable outrigger telescopic system of wheel type crane includes fixed outrigger 12, movable outrigger 13, horizontal oil cylinder 14 and vertical oil cylinder 15, wherein the fixed outrigger 12 and the vehicle frame 11 are generally connected by welding; the movable outrigger 13 is a box type structure, which is nested in the fixed outrigger 12; the horizontal oil cylinder 14 is used to push the movable outrigger 13 to move in and out of the box type of the fixed outrigger 12; the vertical oil cylinder 15 is used to support the whole vehicle off the ground. When lifting operation, the movable outrigger 13 is extended outside the fixed outrigger 12; when driving, the movable outrigger 13 is retracted into the fixed outrigger 12 to ensure that the vehicle does not exceed the width. After the movable outrigger 13 is fully extended, the lateral span is a1; in order to ensure the reliability of the structure, the movable outrigger 13 must have a lap length b1 in the fixed outrigger 12.

[0003] If you want to increase the length of the movable outrigger, you can achieve it by the following two ways: (1) under the condition of ensuring the lap length b1 unchanged, the length of the movable outrigger 13 is increased to increase the lateral span of the outrigger; but due to the limitation of the regulation on the width of the mobile crane, the length of the movable outrigger cannot be continuously increased, thereby limiting the continuous increase of the lateral span. (2) under the condition of the length of the movable outrigger 13 unchanged, the lap length b1 is shortened to increase the lateral span of the outrigger; but this way will increase the load borne by the movable outrigger 13, and increase the probability of reliability risk of the structure. SUMMARY

[0004] The present application provides a telescopic hinged outrigger structure which can realize telescopic first and hinged later, aiming at the above shortcomings, on the basis of ensuring the width of the vehicle and the load bearing performance of the movable outrigger, the lateral span of the whole vehicle can be maximized.

[0005] Technical scheme: in order to solve the above problems, the present application adopts a telescopic hinged outrigger structure, which includes a fixed outrigger, a movable outrigger nested in the fixed outrigger, a driving oil cylinder for pushing the movable outrigger to move horizontally, characterized in that it further includes a hinged assembly installed in the movable outrigger, the movable outrigger is provided with a hinged hole for the hinged assembly to extend out, and the fixed outrigger is provided with a connecting hole corresponding to the position of the hinged hole; when the movable outrigger is extended out of the fixed outrigger, the hinged assembly extends out of the hinged hole and into the connecting hole to hinge the fixed outrigger and the movable outrigger.

[0006] Further, the movable leg is internally provided with an oil cylinder mounting seat, the oil cylinder mounting seat comprises a first connecting surface and a second connecting surface arranged in parallel, and an oil cylinder mounting hole and two notches for the horizontal oil cylinder to pass through are arranged between the first connecting surface and the second connecting surface.

[0007] Further, the hinged assembly comprises a first oil cylinder mounted on the first connecting surface, a first pin shaft connected with the first oil cylinder, a second oil cylinder mounted on the second connecting surface, and a second pin shaft connected with the second oil cylinder, when the movable leg extends out of the fixed leg, the first oil cylinder and the second oil cylinder push the first pin shaft and the second pin shaft to extend out of the hinged hole and into the connecting hole.

[0008] Further, the first oil cylinder and the second oil cylinder are arranged in a manner that the axes thereof are perpendicular to the first connecting surface and the second connecting surface.

[0009] Further, a plurality of bolt mounting holes are formed on the first connecting surface and the second connecting surface, and the first oil cylinder and the second oil cylinder are mounted on the first connecting surface and the second connecting surface through bolts.

[0010] Further, the fixed leg is internally provided with a first pin shaft connecting plate for connecting with the first pin shaft and a second pin shaft connecting plate for connecting with the second pin shaft, a first connecting hole for the first pin shaft to pass through is formed on the first pin shaft connecting plate, and a second connecting hole for the second pin shaft to pass through is formed on the second pin shaft connecting plate.

[0011] Further, the fixed leg is internally provided with a first pin shaft connecting plate for connecting with the first pin shaft and a second pin shaft connecting plate for connecting with the second pin shaft, a first connecting hole for the first pin shaft to pass through is formed on the first pin shaft connecting plate, and a second connecting hole for the second pin shaft to pass through is formed on the second pin shaft connecting plate.

[0012] Further, a vertical oil cylinder for controlling the up-and-down movement of the movable leg is mounted on one end of the movable leg extending out of the fixed leg.

[0013] Further, the fixed leg is internally provided with a first pin shaft connecting plate for connecting with the first pin shaft and a second pin shaft connecting plate for connecting with the second pin shaft, a first connecting hole for the first pin shaft to pass through is formed on the first pin shaft connecting plate, and a second connecting hole for the second pin shaft to pass through is formed on the second pin shaft connecting plate.

[0014] The application also provides a crane comprising the telescopic hinged leg structure.

[0015] Advantages: Compared with the prior art, the application has the following advantages: the movable leg and the fixed leg are hinged through the hinged assembly when the movable leg is fully extended, thereby improving the stability of the connection between the movable leg and the fixed leg; compared with the lap joint mode, the required connection length of the movable leg and the fixed leg is shortened, the lateral span of the crane is effectively increased without increasing the length of the movable leg; the hinged assembly is arranged inside the box-shaped structure of the movable leg, thereby not occupying extra space and being simple in structure and convenient to operate. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a top view of a prior art telescopic leg structure;

[0017] Figure 2 is a front view of a prior art telescopic leg structure;

[0018] Figure 3 is a front view of a telescopic leg structure of the present application;

[0019] Figure 4 is a perspective view of the inside of a telescopic leg structure of the present application;

[0020] Figure 5 is a schematic view of the overall structure of a transfer assembly of the present application;

[0021] Figure 6 is a schematic view of a movable leg structure of the present application;

[0022] Figure 7 is a schematic view of a cylinder mounting seat structure of the present application;

[0023] Figure 8 is a schematic view of a fixed leg structure of the present application;

[0024] Figure 9 is a schematic view of a hinge assembly in a retracted state of the present application;

[0025] Figure 10 is a schematic view of a hinge assembly in an extended state of the present application. DETAILED DESCRIPTION

[0026] As shown in Figure 3 and Figure 4 , a telescopic hinge leg structure in this embodiment includes a frame 1, fixed legs 2, a movable leg 3, a horizontal cylinder 4, and a vertical cylinder 5. Four fixed legs 2 are welded to the frame 1, and the movable leg 3 is nested in the fixed legs 2. As shown in Figure 6 , the movable leg 3 is of a box type structure, and the movable leg 3 is provided with a cylinder mounting seat 33 at one end thereof which is always nested in the fixed legs 2, as shown in Figure 7 , the cylinder mounting seat 33 is of an H type as a whole, and includes parallel upper and lower connecting surfaces 335 and 333, and between which are provided a cylinder mounting hole 332 through which the horizontal cylinder 4 passes, and two cutouts 334 for passing hydraulic and electrical pipelines. The horizontal cylinder 4 is mounted through the cylinder mounting hole 332, and the horizontal cylinder 4 pushes the movable leg 3 to move telescopically in the fixed legs 2. The end of the movable leg 3 extending out of the fixed legs 2 is provided with the vertical cylinder 5 for supporting the frame 1 and controlling the movable leg 3 to move up and down.

[0027] As shown in Figure 5 , the movable leg 3 is also provided with a hinge assembly, which includes an upper oil cylinder 6 mounted on the upper connecting surface 335, an upper pin shaft 8 connected with the upper oil cylinder 6, a lower oil cylinder 7 mounted on the lower connecting surface 333, and a lower pin shaft 9 connected with the lower oil cylinder 7. The upper oil cylinder 6 is coaxially arranged with the lower oil cylinder 7, and the axes of the upper oil cylinder 6 and the lower oil cylinder 7 are perpendicular to the upper connecting surface 335 and the lower connecting surface 333. Four bolt mounting holes 331 are formed in the upper connecting surface 335 and the lower connecting surface 333, and the upper oil cylinder 6 and the lower oil cylinder 7 are mounted on the upper connecting surface 335 and the lower connecting surface 333 by bolts 10. The upper movable leg 3 is provided with upper hinge holes 31 and lower hinge holes 32 for the upper pin shaft 8 and the lower pin shaft 9 to extend out.

[0028] As shown in Figure 8 , the fixed leg 2 is provided with an upper lap block 24 and a lower lap block 25 protruding from the surface of the fixed leg 2, one side of the upper lap block 24 is flush with the outer edge of the fixed leg 2, and the lower lap block 25 is spaced apart from the outer edge of the fixed leg 2 by a predetermined distance. Each fixed leg 2 is provided with two upper lap blocks 24 and two lower lap blocks 25. The fixed leg 2 is provided with an upper pin shaft connecting plate 22 for connecting with the upper pin shaft 8 and a lower pin shaft connecting plate 23 for connecting with the lower pin shaft 9, and the upper and lower end surfaces of the upper pin shaft connecting plate 22 and the lower pin shaft connecting plate 23 are flush with the surface of the fixed leg 2. The upper pin shaft connecting plate 22 is provided with an upper connecting hole 221 for the upper pin shaft 8 to pass through, and the lower pin shaft connecting plate 23 is provided with a lower connecting hole 231 for the lower pin shaft 9 to pass through.

[0029] When the crane is in running state, the movable leg 3 is retracted into the fixed leg 2 to ensure that the vehicle does not exceed the width, at this time the hinge assembly does not need to be started, and the hinge assembly is in a retracted state, the upper pin shaft 8 and the lower pin shaft 9 do not extend out of the hinge hole, as shown in Figure 9 , when the crane is in running state, the movable leg 3 is retracted into the fixed leg 2 to ensure that the vehicle does not exceed the width, at this time the hinge assembly does not need to be started, and the hinge assembly is in a retracted state, the upper pin shaft 8 and the lower pin shaft 9 do not extend out of the hinge hole, as shown in Figure 10The connecting length of the articulated movable supporting leg 3 and the fixed supporting leg 2 is b2, which is smaller than the connecting length b1 required by the prior art in the lap joint mode. In the case that the length of the movable supporting leg cannot be further increased, the maximum supporting leg transverse span a2 of the present application is larger than the maximum supporting leg transverse span a1 of the prior art.

[0030] The present application improves the stability of the connection between the movable supporting leg and the fixed supporting leg by articulating the fully extended movable supporting leg and the fixed supporting leg through the articulated assembly. Meanwhile, compared with the lap joint mode, the connecting length of the movable supporting leg and the fixed supporting leg is shortened. In the case that the length of the movable supporting leg is not increased, the transverse span of the crane supporting leg is effectively increased. The articulated assembly is arranged inside the box-shaped structure of the movable supporting leg, does not occupy extra space, and has a simple structure and convenient operation.

Claims

1. A telescopic articulated support leg structure, comprising a fixed support leg (2), a movable support leg (3) nested within the fixed support leg (2), and a drive cylinder (4) for horizontally moving the movable support leg (3), characterized in that, It also includes a hinge assembly installed in the movable leg (3), the movable leg (3) having a hinge hole for the hinge assembly to extend out, and the fixed leg (2) having a connection hole corresponding to the position of the hinge hole; when the movable leg (3) extends out of the fixed leg (2), the hinge assembly extends out of the hinge hole and into the connection hole to hinge the fixed leg (2) and the movable leg (3); The movable support leg (3) is provided with a cylinder mounting seat (33). The cylinder mounting seat (33) includes a first connecting surface (335) and a second connecting surface (333) arranged in parallel. Between the first connecting surface (335) and the second connecting surface (333), there is a cylinder mounting hole (332) for the horizontal cylinder (4) to pass through and two notches (334). The hinge assembly includes a first hydraulic cylinder (6) mounted on a first connecting surface (335), a first pin (8) connected to the first hydraulic cylinder (6), a second hydraulic cylinder (7) mounted on a second connecting surface (333), and a second pin (9) connected to the second hydraulic cylinder (7). When the movable support leg (3) extends out of the fixed support leg (2), the first hydraulic cylinder (6) and the second hydraulic cylinder (7) push the first pin (8) and the second pin (9) out of the hinge hole and into the connecting hole. The fixed support leg (2) is provided with a first pin connecting plate (22) for connecting with the first pin (8) and a second pin connecting plate (23) for connecting with the second pin (9). The first pin connecting plate (22) has a first connecting hole for the first pin (8) to pass through, and the second pin connecting plate (23) has a second connecting hole for the second pin (9) to pass through. It also includes a first overlapping block (24) disposed on the upper surface inside the fixed leg (2) and a second overlapping block (25) disposed on the lower surface inside the fixed leg (2). One side of the first overlapping block (24) is flush with the outer edge of the fixed leg (2), and the second overlapping block (25) is separated from the outer edge of the fixed leg (2) by a predetermined distance. If the movable outrigger (3) does not need to be fully extended during operation, there is no need to activate the hinge assembly. The movable outrigger (3) and the fixed outrigger (2) are connected by the upper overlapping block (24) and the lower overlapping block (25). The upper overlapping block (24) and the lower overlapping block (25) serve as support points, so that the movable outrigger (3) can stably extend the fixed outrigger (2). When the movable outrigger (3) needs to be fully extended, the horizontal cylinder (4) first pushes the movable outrigger (3) to fully extend. The upper cylinder (6) pushes the upper pin (8) to extend the upper hinge hole (31) and the upper connecting hole (221) in sequence. The lower cylinder (7) pushes the lower pin (9) to extend the lower hinge hole (32) and the lower connecting hole (231) in sequence. The movable outrigger (3) and the fixed outrigger (2) are hinged together by the upper pin (8) and the lower pin (9).

2. The telescopic hinged support leg structure as described in claim 1, characterized in that, The axes of the first hydraulic cylinder (6) and the second hydraulic cylinder (7) are perpendicular to the first connecting surface (335) and the second connecting surface (333).

3. The telescopic hinged support leg structure as described in claim 1, characterized in that, The first connecting surface (335) and the second connecting surface (333) are each provided with a plurality of bolt mounting holes (331). The first oil cylinder (6) and the second oil cylinder (7) are mounted on the first connecting surface (335) and the second connecting surface (333) by bolts (10).

4. The telescopic hinged support leg structure as described in claim 1, characterized in that, The movable support leg (3) is extended from the fixed support leg (2) and a vertical hydraulic cylinder (5) is installed on one end for controlling the up and down movement of the movable support leg (3).

5. The telescopic hinged support leg structure as described in claim 1, characterized in that, It also includes a frame (1) connected to the fixed legs (2), the frame (1) having four fixed legs (2) and four movable legs (3).

6. A crane, characterized in that, Includes the telescopic articulated support leg structure as described in any one of claims 1-5.

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