Crane girder lifting device

Abstract

The utility model relates to a crane main beam lifting device which is characterized in that a crane is movably arranged on a main beam, the lower ends of the two sides of the main beam are respectively arranged on the middle parts of end beams on the two sides, and crane main beam lifting devices are respectively arranged between the two sides of the main beam and the end beams on the two sides. The device comprises hydraulic cylinders, main beam connecting plates, end beam connecting plates and high-strength bolts, the lower ends of the two sides of a main beam are each provided with one main beam connecting plate, a groove is formed in the middle of each end beam, the hydraulic cylinders are installed in the grooves in the middles of the end beams, and the telescopic ends of the upper ends of the hydraulic cylinders are connected with the middle positions of the lower ends of the end beam connecting plates; the periphery of the end beam connecting plate is fixed to the lower end of the main beam connecting plate through a plurality of high-strength bolts. The lifting device has the advantages that the design is ingenious, the structure is reasonable and compact, the main beam can be lifted through the hydraulic cylinders on the two sides under the condition that the cranes on the upper layer and the lower layer are staggered, the cranes are lifted to a certain height, and the ideal lifting height can be obtained when the cranes are lifted.

Description

Technical Field

[0001] The utility model relates to the field of cranes, in particular to a crane main beam lifting device. Background Art

[0002] Currently, in the crane field, bolts are used to fix the main beam and end beam. When there are cranes on both the upper and lower floors, the lower crane is often unable to achieve the ideal lifting height due to the size limitation of the upper crane. Summary of the Invention

[0003] In order to solve the above technical problems, the utility model proposes a crane main beam lifting device with ingenious design, reasonable and compact structure, which can ensure that the main beam can be lifted to obtain an ideal lifting height when the upper and lower cranes are staggered.

[0004] The technical solution of this utility model:

[0005] A crane main beam lifting device, the crane is movably installed on the main beam, the lower ends of both sides of the main beam are respectively installed on the middle of the end beam on each side, and the crane main beam lifting device is respectively installed between the two sides of the main beam and the end beams on both sides. It is characterized in that it includes a hydraulic cylinder, a main beam connecting plate, an end beam connecting plate, and high-strength bolts. A main beam connecting plate is respectively installed on the lower ends of both sides of the main beam, a groove is opened in the middle of the end beam, the hydraulic cylinder is installed in the groove in the middle of the end beam, and the upper telescopic end of the hydraulic cylinder is connected to the middle position of the lower end of the end beam connecting plate; the end beam connecting plate is fixed to the lower end of the main beam connecting plate by a number of high-strength bolts around it.

[0006] A step groove is designed around the mouth of the groove, and a connecting plate guide positioning block is designed on the front and rear sides of the step groove on the end beam respectively; after the hydraulic cylinder contracts, the edge of the end beam connecting plate is located in the step groove, and the main beam connecting plate is located between the two connecting plate guide positioning blocks on the end beam.

[0007] The depth of the step groove is the same as the thickness of the end beam connecting plate; the height of the connecting plate guide positioning block is the same as the thickness of the main beam connecting plate.

[0008] Guide rods are respectively installed on both sides of the lower end of the end beam connecting plate, and guide sleeves are correspondingly installed in the grooves. The guide rods are slidably installed in the guide sleeves.

[0009] The lower end and the middle of the hydraulic cylinder are connected to the groove through reinforcing plates respectively.

[0010] The advantages of this utility model are ingenious design and reasonable and compact structure. It can ensure that when the upper and lower cranes are staggered, the main beam can be lifted by the hydraulic cylinders on both sides to lift the crane to a certain height, so that the ideal lifting height can be obtained during crane lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of a crane of the present invention.

[0012] Figure 2 It is a schematic diagram of the normal state of the crane main beam lifting device of the present utility model.

[0013] Figure 3 It is a schematic diagram of the lifting state of the crane main beam lifting device of the present invention. DETAILED DESCRIPTION

[0014] Refer to the attached Figure 1-3 A crane main beam lifting device, a crane 20 is movably installed on the main beam 1, the lower ends of both sides of the main beam 1 are respectively installed on the middle of the end beam 2 on each side, and the crane main beam 1 lifting device is respectively installed between the two sides of the main beam 1 and the end beams 2 on both sides. It includes a hydraulic cylinder 3, a main beam connecting plate 4, an end beam connecting plate 5, and high-strength bolts 6. A main beam connecting plate 4 is respectively installed on the lower ends of both sides of the main beam 1, and a groove 7 is opened in the middle of the end beam 2. The hydraulic cylinder 3 is installed in the groove 7 in the middle of the end beam 2. The upper telescopic end of the hydraulic cylinder 3 is connected to the middle position of the lower end of the end beam connecting plate 5; the end beam connecting plate 5 is fixed to the lower end of the main beam connecting plate 4 by a number of high-strength bolts 6 around it.

[0015] The groove 7 has a stepped groove 8 around its mouth. A connecting plate guide block 9 is located on both sides of the stepped groove 8, located on the end beam 2. When the hydraulic cylinder 3 is retracted, the edge of the end beam connecting plate 5 lies within the stepped groove 8, while the main beam connecting plate 4 lies between the two connecting plate guide blocks 9 on the end beam 2. The depth of the stepped groove 8 is the same as the thickness of the end beam connecting plate 5; the height of the connecting plate guide blocks 9 is the same as the thickness of the main beam connecting plate 4. This design ensures stable structural coordination and smooth operation.

[0016] Guide rods 10 are respectively installed on both sides of the lower end of the end beam connecting plate 5, and guide sleeves 11 are correspondingly installed in the grooves 7. The guide rods 10 are slidably installed in the guide sleeves 11.

[0017] The lower end and the middle of the hydraulic cylinder 3 are connected to the groove 7 through a reinforcing plate 12. The reinforcing plate design ensures a stable connection. The hydraulic cylinder adopts an electric hydraulic cylinder.

[0018] When the utility model is used, the crane can move left and right at the lower end of the main beam, and the main beam moves forward and backward along the guide rails through the end beams on both sides (the motor drives the guide wheels to move along the guide rails). These are all existing technologies. The utility model is simply described as follows: when the crane of the lower layer of the double-deck crane needs to continue to lift the weight to a certain height, the hydraulic cylinder is controlled to extend, and the main beams on both sides are lifted to a certain height at the same time to meet the requirements of a wider lifting height; to avoid interference problems with some large equipment, when it is not necessary to lift to a certain height, the hydraulic cylinder is retracted, and the end beam connecting plate is stuck in the step groove and the height is the same, and the main beam connecting plate is stuck between the connecting plate guide positioning blocks and the height is the same, so that effective positioning and limiting are performed, which is safe and reliable; the guide rod and guide sleeve ensure that the lifting process is stable and smooth, and the main beam will not move.

Claims

1. A crane main beam lifting device, wherein the crane is movably mounted on the main beam, the lower ends of the main beam are respectively mounted on the middle of the end beams on each side, and the crane main beam lifting device is respectively installed between the two sides of the main beam and the end beams on both sides, characterized in that: It includes a hydraulic cylinder, a main beam connecting plate, an end beam connecting plate, and high-strength bolts. A main beam connecting plate is installed at the lower end of each side of the main beam. A groove is opened in the middle of the end beam. The hydraulic cylinder is installed in the groove in the middle of the end beam. The upper telescopic end of the hydraulic cylinder is connected to the middle position of the lower end of the end beam connecting plate; the end beam connecting plate is fixed to the lower end of the main beam connecting plate by a number of high-strength bolts around it.

2. A crane main beam lifting device according to claim 1, characterized in that: A step groove is designed around the mouth of the groove, and a connecting plate guide positioning block is designed on the front and rear sides of the step groove on the end beam respectively; after the hydraulic cylinder contracts, the edge of the end beam connecting plate is located in the step groove, and the main beam connecting plate is located between the two connecting plate guide positioning blocks on the end beam.

3. The crane main beam lifting device according to claim 2, characterized in that: The depth of the step groove is the same as the thickness of the end beam connecting plate; the height of the connecting plate guide positioning block is the same as the thickness of the main beam connecting plate.

4. The crane main beam lifting device according to claim 1, characterized in that: Guide rods are respectively installed on both sides of the lower end of the end beam connecting plate, and guide sleeves are correspondingly installed in the grooves. The guide rods are slidably installed in the guide sleeves.

5. The crane main beam lifting device according to claim 1, characterized in that: The lower end and the middle of the hydraulic cylinder are connected to the groove through reinforcing plates respectively.

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