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CN-118598006-B - Telescopic supporting leg system and crane

CN118598006BCN 118598006 BCN118598006 BCN 118598006BCN-118598006-B

Abstract

The invention discloses a telescopic support leg system and a crane, wherein the telescopic support leg comprises a fixed support leg box with an opening at one end and a movable support leg sleeved in the fixed support leg box, the movable support leg is driven to extend or retract by a horizontal oil cylinder, a through hole for a transmission shaft to pass through is formed in the front panel and the rear panel of the fixed support leg, a transverse U-shaped plate is arranged in the middle of the movable support leg, the transmission shaft passing through the through hole is avoided through the U-shaped plate when the movable support leg extends or retracts, a supporting block for overlapping a top plate and a bottom plate of the U-shaped plate is arranged on the closed side of the U-shaped plate, and a driving mechanism for driving the supporting block to be close to the opening or the through hole at the end part of the fixed support leg box when the movable support leg stretches is arranged in the movable support leg. The through holes are used for the transmission shafts of the transmission system to penetrate, the supporting blocks are driven to be close to the end openings of the fixed leg boxes, the movable legs extend out of the supporting blocks and are located on the opening sides of the U-shaped plates, the top plates and the bottom plates of the movable legs are overlapped, the bearing capacity of loss of the movable legs is complemented, the supporting blocks are driven to be close to the through holes, and the movable legs are fully retracted and hidden.

Inventors

  • CUI SHUWEN
  • LI HU
  • ZHOU NAN
  • LIN TIANYU

Assignees

  • 徐州重型机械有限公司

Dates

Publication Date
20260505
Application Date
20240621

Claims (6)

  1. 1. The telescopic support leg system comprises a fixed support leg box (11) with one end being opened and a movable support leg (12) sleeved in the fixed support leg box, wherein the movable support leg is driven to extend or retract by a horizontal oil cylinder (17), the telescopic support leg system is characterized in that a front panel and a rear panel of the fixed support leg box (11) are provided with through holes (111) for a transmission shaft to pass through, the middle part of the movable support leg (12) is provided with a transverse U-shaped plate (125), the movable support leg (12) is provided with a transmission shaft which passes through the through holes in an avoidance mode through the U-shaped plate (125) when extending or retracting, a supporting block (13) which can slide in a cavity formed by encircling the U-shaped plate and the front panel and the rear panel of the fixed support leg box (11) is arranged in the U-shaped plate, a panel between the through holes (111) of the fixed support leg box and the end opening is provided with baffle plates or bulges, the baffle plates or bulges are not less than 2, one end of each supporting block (13) is provided with a limit groove (136) matched with the baffle plates or bulges, the other end wall is provided with a chute (135) matched with the baffle plates or bulges, the U-shaped plate (125) is arranged on one end, the other end wall is provided with a guide pin roll (14) is arranged on the end of the supporting block (13) and the driving mechanism is arranged on the signal transmission module, and the signal transmission module (14) is arranged on the driving module, and the signal transmission module is arranged on the driving module is in a sliding module, and the driving module is arranged on the driving module and has a pin 14, the guide groove is internally symmetrically provided with a front inclined plane (132) and a rear inclined plane (133), an electromagnet is electrified or a pin shaft (14) stretches out to drive a supporting block (13) to slide, when the movable supporting leg (12) stretches out relative to the fixed supporting leg box (11), the supporting block (13) is close to an opening at the end part of the fixed supporting leg box (11) and is positioned at the opening end of the U-shaped plate of the movable supporting leg (12) so as to overlap the top plate and the bottom plate, and when the movable supporting leg (12) stretches back relative to the fixed supporting leg box (11), the supporting block (13) is positioned at the closed end of the U-shaped plate (125) and is close to the end part of the through hole (111).
  2. 2. The telescopic leg system according to claim 1, wherein the pin (14) comprises a sleeve (141) for connecting with the top plate or the bottom plate of the U-shaped plate (125), a mandrel (142) in the sleeve, the mandrel is slidably connected with the sleeve through a waist boss (1422), the top is sleeved with a return spring, and the bottom is provided with an inclined plane matched with the supporting block (13).
  3. 3. The telescoping leg system as in claim 1, wherein the pin (14) is provided on a closed end top plate of the U-shaped plate (125).
  4. 4. Telescopic leg system according to claim 1, characterized in that the support block (13) is trapezoidal in cross section and rectangular in cross section.
  5. 5. The telescopic support leg system according to claim 1, wherein the movable support leg (12) is of a hollow box type structure, one end of the horizontal oil cylinder is connected with the side wall of the fixed support leg box (11), and the other end of the horizontal oil cylinder extends into the movable support leg (12) to be connected with the side wall of the movable support leg.
  6. 6. A crane comprising the telescopic leg system according to any one of claims 1 to 5, said telescopic leg system being a front leg system.

Description

Telescopic supporting leg system and crane Technical Field The invention relates to a telescopic support leg system of a crane and also relates to the crane. Background The wheeled crane is used as a special vehicle, and the frame is provided with a power transmission system such as an engine, a transmission shaft, an axle and the like which are necessary for the wheeled vehicle, and is also provided with a landing leg system which is required by hoisting the crane. Most wheeled cranes have a power system and drive axles arranged on both front and rear sides of the front fixed leg, which results in the transmission system having to bypass the front fixed leg. Because of the requirement of the lifting performance of the crane, the box type of the supporting leg is required to be as large as possible, and the arrangement space of the transmission system is compressed due to the increase of the box type of the supporting leg, so that the arrangement of the power transmission system is difficult, and the performance of a product is influenced. Therefore, a novel supporting leg structure is required to be designed, so that the arrangement requirement of a power transmission system of a crane can be met, and the lifting performance of the crane can be effectively improved. In order to solve the technical problems, the existing wheel crane transmission system bypasses the front fixed support leg in two ways, namely, the transmission shaft is arranged on the upper part and the transmission shaft is arranged under the lower part. The transmission shaft overhead scheme is shown in fig. 1, and a transmission shaft 3 of an engine and a gearbox 2 passes through the upper part of a front fixed support leg system 1, then an oil pump 4 and the like are connected, and the whole front fixed support leg is lower. In the scheme, due to the bearing requirement, the box-shaped height of the fixed support leg is large, the transmission shaft needs to be arranged in a segmented mode, a section above the fixed support leg is horizontally arranged, the fixed support leg is obliquely downwards arranged after crossing the fixed support leg, if the box-shaped size of the fixed support leg is increased upwards, the included angle between the horizontal section of the transmission shaft and the inclined section is further increased, the working of a transmission system is not facilitated, and if the box-shaped size of the fixed support leg is increased downwards, the ground clearance of the whole vehicle is reduced, and the passing performance of the vehicle is affected. The lower scheme of the transmission shaft is shown in fig. 2, the transmission shaft passes under the front fixing support leg, and the front fixing support leg is higher as a whole, for example, the technical scheme disclosed in patent 201110276240.0. The transmission shaft passes through from the fixed landing leg below, and the problem of transmission shaft contained angle can be solved, but because the fixed landing leg is higher, after the hoist and mount operating mode car, the complete machine focus becomes high, and vertical cylinder stretches out more simultaneously, and hoist and mount stability is impaired. Disclosure of Invention The invention aims to provide a telescopic support leg system which is beneficial to the arrangement of a power transmission system of a crane and meets the bearing requirement, and another aim of the invention is to provide a crane which meets the arrangement of the power transmission and the lifting performance simultaneously. According to the technical scheme, the telescopic support leg system comprises a fixed support leg box with an opening at one end and a movable support leg sleeved in the fixed support leg box, wherein the movable support leg is driven to extend or retract by a horizontal oil cylinder, a through hole for a transmission shaft to pass through is formed in the front panel and the rear panel of the fixed support leg, a transverse U-shaped plate is arranged in the middle of the movable support leg, the transmission shaft passing through the through hole is avoided through the U-shaped plate when the movable support leg extends or retracts, a supporting block for overlapping a top plate and a bottom plate of the U-shaped plate is arranged on the closed side of the U-shaped plate, and a driving mechanism for driving the supporting block to be close to the opening or the through hole at the end part of the fixed support leg box when the movable support leg stretches is arranged in the movable support leg. According to the invention, the through holes are used for the transmission shafts of the transmission system to pass through, so that the arrangement requirement of the power transmission system of the crane is met, the supporting blocks are added, the supporting blocks are driven to be close to the end openings of the fixed leg boxes, when the movable legs extend out, the supporting blocks are positioned at the o