Movable supporting leg of crane

Abstract

The utility model discloses a movable supporting leg of a crane, and relates to the technical field of cranes. The movable supporting leg of the crane comprises a crane platform, a supporting leg platform, a hydraulic supporting leg and an auxiliary supporting leg, the supporting leg platform is installed at the bottom end of the crane platform through a hinge rod, and the supporting leg platform changes the relative positions of the hydraulic supporting leg and the auxiliary supporting leg on the supporting leg platform below the crane platform with the hinge rod as a base point. The crane platform is provided with a hydraulic oil way, a hydraulic pump and an oil tank which are matched with the hydraulic supporting legs to stretch out and draw back; the auxiliary supporting legs are hinged with the supporting leg platform. According to the utility model, the landing leg platform is arranged, and the relative position of the landing leg platform is changed below the crane platform by taking the hinge rod as a base point; the bearing capacity of the hydraulic supporting legs is high, control is accurate, and the corresponding speed is high; the auxiliary supporting legs can indirectly prolong the service life of the supporting leg platform. The hydraulic supporting legs and the auxiliary supporting legs are matched, so that the supporting effect and stability of the crane are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hoist, more specifically to the movable supporting leg of hoist. BACKGROUND

[0002] The hoist is a kind of mechanical equipment for hoisting, transporting and installing heavy objects.According to different classification standards, the hoist can be divided into different types, and the truck-mounted or floor-mounted hoist is a common hoist type.The conventional hoist makes the whole hoist more stable by symmetrical supporting legs at side ends, and a single movable supporting leg is usually arranged at one side, but when the hoist hoists heavy objects, it puts forward higher requirements for the strength of the platform where the supporting leg is located, and only relying on the bending resistance of the platform material itself is prone to deformation in long-term use. SUMMARY

[0003] The utility model discloses a movable supporting leg of hoist to solve the above technical problems.

[0004] The utility model discloses a movable supporting leg of hoist to solve the above technical problems.

[0005] A movable supporting leg of hoist, including hoist platform, supporting leg platform, hydraulic supporting leg, auxiliary supporting leg, supporting leg platform is installed to the hoist platform bottom end by hinged lever, and the relative position of hydraulic supporting leg and auxiliary supporting leg on supporting leg platform is changed below the hoist platform with hinged lever as base point, the hydraulic oil circuit for cooperating with the expansion of hydraulic supporting leg is arranged on the hoist platform, hydraulic pump, oil tank, auxiliary supporting leg is hinged to supporting leg platform, and auxiliary supporting leg and hydraulic supporting leg are distributed to both sides of supporting leg platform, and the hinged lever is installed on one side of auxiliary supporting leg.

[0006] The utility model discloses a movable supporting leg platform, and the overlapping area of supporting leg platform and hoist platform accounts for more than half of the corresponding size of supporting leg platform, and the corresponding position is assisted and supported by auxiliary supporting leg, the risk of deformation of supporting leg platform is reduced by the high-strength steel material of supporting leg platform.

[0007] A preferred technical solution: the hydraulic supporting leg includes a sleeve, a supporting leg and a flat foot, the supporting leg is slidably installed in the sleeve, the top end of the supporting leg and the inner wall of the sleeve form a sealed oil cavity, and the flat foot is welded and fixed at the bottom end of the supporting leg.

[0008] An auxiliary foot can also be provided in the auxiliary supporting leg, which has a similar structure to the hydraulic supporting leg, i.e., a T-shaped piece is provided, but the control mode of the auxiliary supporting leg is manual, and after the hydraulic supporting leg is extended to support, the T-shaped piece is controlled to screw out the auxiliary foot to assist in supporting.

[0009] A preferred technical solution: the hydraulic oil circuit comprises an oil inlet pipe and an oil return pipe, both ends of the oil inlet pipe are respectively connected with the sealed oil cavity and the oil tank, both ends of the oil return pipe are respectively connected with the sealed oil cavity and the oil tank. The oil inlet pipe and the oil return pipe can be made of a hose with sufficient length, so that the relative position of the support leg platform is not limited by the hydraulic oil circuit.

[0010] A preferred technical solution: a one-way valve is arranged on the oil inlet pipe, and the control direction of the one-way valve is changed from the oil tank side to the sealed oil cavity side.

[0011] A preferred technical solution: an oil return valve is arranged on the oil return pipe.

[0012] A preferred technical solution: the oil inlet pipe is connected to the bottom of the oil tank.

[0013] A preferred technical solution: the oil return pipe is connected to the top of the oil tank.

[0014] The beneficial effects of the present application are as follows:

[0015] The present application sets up a support leg platform, and the relative position of the support leg platform is changed below the crane platform by taking the hinge rod as a base point, so that the hydraulic support legs and the auxiliary support legs on the support leg platform are movable support legs. The hydraulic support legs have strong bearing capacity, accurate control and high speed; the auxiliary support legs can indirectly prolong the service life of the support leg platform. The multiple hydraulic support legs and auxiliary support legs are matched to improve the supporting effect and stability of the crane. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The structure of the present application is shown in the figure;

[0017] Figure 2 The structure of the present application is shown in the figure; Figure 1 The local enlarged view of A in the figure;

[0018] Reference signs: 1, crane platform; 2, support leg platform; 21, hinge rod; 3, hydraulic support leg; 31, sleeve; 311, sealed oil cavity; 32, support foot; 33, plane foot; 4, auxiliary support leg; 41, auxiliary foot; 5, hydraulic oil circuit; 51, oil inlet pipe; 511, one-way valve; 52, oil return pipe; 521, oil return valve; 6, hydraulic pump; 7, oil tank. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0021] like Figures 1 to 2 As shown, this embodiment provides a movable outrigger for a crane, including a crane platform 1, an outrigger platform 2, a hydraulic outrigger 3, and an auxiliary outrigger 4. The outrigger platform 2 is installed at the bottom of the crane platform 1 via a hinge rod 21. The outrigger platform 2 changes the relative position of the hydraulic outrigger 3 and the auxiliary outrigger 4 below the crane platform 1 with the hinge rod 21 as the base point. The crane platform 1 is equipped with a hydraulic oil circuit 5, a hydraulic pump 6, and an oil tank 7 for cooperating with the extension and retraction of the hydraulic outrigger 3. The auxiliary outrigger 4 is hinged to the outrigger platform 2, and the auxiliary outrigger 4 and the hydraulic outrigger 3 are distributed on both sides of the outrigger platform 2. A hinge rod 21 is installed on one side of the auxiliary outrigger 4 to reflect the relative position of the auxiliary outrigger 4 and the hinge rod 21. The auxiliary outrigger 4 and the hinge rod 21 are structurally adjacent and relatively close, which improves the structural stability of the outrigger platform 2 near the hinge rod 21.

[0022] This utility model reduces the risk of deformation of the outrigger platform 2 by setting up a movable outrigger platform 2, with the overlapping area between the outrigger platform 2 and the crane platform 1 being at least half of the corresponding size of the outrigger platform 2, and by using auxiliary outriggers 4 to provide auxiliary support at the corresponding positions, combined with the high-strength steel material of the outrigger platform 2.

[0023] Furthermore, the hydraulic outrigger 3 includes a sleeve 31, a support foot 32, and a flat foot 33. The support foot 32 is slidably installed inside the sleeve 31. The top of the support foot 32 forms a sealed oil cavity 311 with the inner wall of the sleeve 31. The flat foot 33 is welded and fixed to the bottom of the support foot 32.

[0024] An auxiliary foot 41 can also be installed inside the auxiliary outrigger 4. The structure of the auxiliary foot 41 is similar to that of the hydraulic outrigger 3, that is, it is equipped with a T-shaped component. However, the auxiliary outrigger 4 is controlled manually. After the hydraulic outrigger 3 extends to provide support, the T-shaped component is screwed out of the auxiliary foot 41 to provide auxiliary support. The hydraulic outrigger 3 is controlled by hydraulic drive and has the advantages of high load-bearing capacity, precise control, and fast response.

[0025] Furthermore, the hydraulic circuit 5 includes an inlet pipe 51 and a return pipe 52. The two ends of the inlet pipe 51 are respectively connected to the sealed oil chamber 311 and the oil tank 7, and the two ends of the return pipe 52 are respectively connected to the sealed oil chamber 311 and the oil tank 7. The inlet pipe 51 and the return pipe 52 can be flexible hoses with sufficient length to allow the outrigger platform 2 to adjust its relative position without being restricted by the hydraulic circuit 5.

[0026] Further, the hydraulic oil circuit 5 can use a combination of hard pipes and flexible hoses, i.e. hard pipes are used in the fixed part, and flexible hoses are used in the remaining part.

[0027] Further, a one-way valve 511 is provided on the oil inlet pipe 51, and the control direction of the one-way valve 511 is changed from the oil tank 7 side to the sealed oil chamber 311 side.

[0028] Further, an oil return valve 521 is installed on the oil return pipe 52, which is an important component in the hydraulic system, mainly used to control the flow of hydraulic oil from the actuator (such as hydraulic cylinder or hydraulic motor) back to the oil tank 7. Its function is to regulate the return flow rate, pressure or direction of hydraulic oil, so as to ensure the stable operation and safety of the hydraulic system.

[0029] Further, the oil inlet pipe 51 is connected through to the bottom of the oil tank 7, which is convenient for preferentially pumping oil from the bottom of the oil tank 7.

[0030] Further, the oil return pipe 52 is connected through to the top of the oil tank 7, which is convenient for returning oil from the top of the oil tank 7.

[0031] In use, the relative positions of the leg platforms 2 are adjusted according to the needs, and when the leg platforms 2 are adjusted, the hydraulic legs 3 and auxiliary legs 4 on the leg platforms 2 are synchronously adjusted. Through the hydraulic pump 6, the oil in the oil tank 7 is transferred to the sealed oil chamber 311 in the sleeve 31, so that the support feet 32 are extended for support, and the plane feet 33 at the bottom end of the support feet 32 are in contact with the ground. When the hydraulic legs 3 on both sides of the leg platforms 2 support the whole crane, the auxiliary legs 4 can be used for auxiliary support.

Claims

1. A mobile support leg of a crane, characterized in that The crane platform, the leg platform, the hydraulic leg, and the auxiliary leg are included, the leg platform is installed at the bottom end of the crane platform through the hinge rod, the relative position of the hydraulic leg and the auxiliary leg on the leg platform is changed below the crane platform based on the hinge rod, the hydraulic oil circuit, the hydraulic pump, and the oil tank are installed on the crane platform to match the extension and contraction of the hydraulic leg, the auxiliary leg is hingedly connected with the leg platform, the auxiliary leg and the hydraulic leg are distributed on both sides of the leg platform, and the hinge rod is installed on one side of the auxiliary leg.

2. A mobile leg of a crane according to claim 1, characterized in that The hydraulic leg includes a sleeve, a support foot, and a flat foot, the support foot is slidably installed in the sleeve, the top end of the support foot and the inner wall of the sleeve form a sealed oil cavity, and the flat foot is welded and fixed at the bottom end of the support foot.

3. A mobile leg of a crane according to claim 2, characterized in that The hydraulic oil circuit includes an oil inlet pipe and an oil return pipe, the two ends of the oil inlet pipe are respectively connected with the sealed oil cavity and the oil tank, and the two ends of the oil return pipe are respectively connected with the sealed oil cavity and the oil tank.

4. A mobile leg of a crane according to claim 3, characterised in that A one-way valve is arranged on the oil inlet pipe, and the control direction of the one-way valve is transferred from the oil tank side to the sealed oil cavity side.

5. A mobile leg of a crane according to claim 3, characterized in that An oil return valve is arranged on the oil return pipe.

6. A mobile leg of a crane according to claim 3, characterised in that The oil inlet pipe is connected to the bottom of the oil tank.

7. A mobile leg of a crane according to claim 3, characterized in that The oil return pipe is connected to the top of the oil tank.

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