A crane girder for a double girder crane

Abstract

The utility model relates to double -beam crane technical field, concretely is a kind of crane beam for double -beam crane, including first crane beam, the surface of first crane beam is slidably connected with second crane beam, the top of first crane beam is fixedly connected with machine arm, the top of machine arm is fixedly connected with connecting table, the inner wall of connecting table is rotatably connected with fixed link. In the utility model, adopt pure mechanical linkage design, drive lubrication system by the self-motion of crane operation, need not additional power source, both energy saving and environmental protection and reduce maintenance cost;Innovative staggered helical gear transmission cooperates four groups of oil outlet cotton roller layout, realizes the lubrication coverage of crane beam all directions, no dead angle, effectively solve the problem that traditional lubrication mode is difficult to even cover, still keep stable performance under metallurgical high temperature environment, greatly reduce equipment maintenance frequency and repair cost, with significant economic benefits and practical value.

Description

Technical Field

[0001] This utility model relates to the field of double-girder crane technology, specifically a crane beam for a double-girder crane. Background Technology

[0002] In the operation of traditional double-girder cranes, friction and wear between the sliding beams have always been a key factor affecting the service life and operating efficiency of the equipment. Currently, common lubrication methods mainly involve manual periodic application of grease or centralized lubrication systems. These methods have obvious limitations: manual lubrication is not only inefficient, but also difficult to guarantee the uniformity and timeliness of lubrication, especially under harsh conditions such as high altitude and high temperature. While centralized lubrication systems have a high degree of automation, they require additional power units and complex piping systems, increasing equipment costs and maintenance difficulty. In addition, existing lubrication technologies often cannot adapt to the special needs of cranes under different working conditions, such as the easy failure of conventional lubricants in high-temperature environments and uneven lubrication under heavy load conditions. As cranes develop towards larger and more intelligent models, there is an urgent need to develop a new type of lubrication system that can automatically adapt to different working conditions, requires no external power, and is easy to maintain, in order to solve the technical bottlenecks of traditional lubrication methods. Utility Model Content

[0003] Therefore, this utility model provides a crane beam for a double-girder crane to solve the above-mentioned problems.

[0004] This utility model provides the following technical solution: a crane beam for a double-girder crane, comprising a first crane beam, a second crane beam slidably connected to the surface of the first crane beam, a boom fixedly connected to the top of the first crane beam, a connecting platform fixedly connected to the top of the boom, a fixed rod rotatably connected to the inner wall of the connecting platform, a hook provided on the surface of the fixed rod, and a lubrication mechanism provided on the surface of the first crane beam.

[0005] As a preferred embodiment of this utility model, the lubrication mechanism includes a first support plate, a toothed plate fixedly connected to the inner wall of the first support plate, first rotating rods movably mounted on both the left and right sides of the second crane beam via bearings, a ratchet fixedly connected to one end of each first rotating rod, the surface of the ratchet meshing with the surface of the toothed plate, second support plates fixedly connected to the front and rear sides of both the left and right sides of the second crane beam, a third support plate fixedly mounted on the top of the second support plate, a second rotating rod movably connected to the inner wall of the third support plate via bearings, a fourth support plate fixedly connected to the left rear and right front sides of the top of the second crane beam, a third rotating rod movably connected to the inner wall of the fourth support plate via bearings, and lubrication components fixedly mounted on the surfaces of both the second and third rotating rods.

[0006] As a preferred embodiment of this utility model, a first interlaced helical gear is fixedly sleeved on the surface of the third rotating rod, and a second interlaced helical gear is fixedly sleeved on the surface of the second rotating rod, wherein the surface of the second interlaced helical gear meshes with the surface of the first interlaced helical gear.

[0007] As a preferred embodiment of this utility model, a synchronous wheel is fixedly sleeved on the surface of both the first rotating rod and the second rotating rod, and a synchronous belt is movably sleeved on the surface of the synchronous wheel.

[0008] As a preferred embodiment of this utility model, the surface of the synchronous pulley is provided with several toothed grooves, and the inner ring of the synchronous belt meshes with the surface of the synchronous pulley.

[0009] As a preferred embodiment of this utility model, the lubrication assembly includes an oil-discharging cotton roller, the surface of which abuts against the surface of the first crane beam, and an oil storage cavity is fixedly provided on the inner wall of the oil-discharging cotton roller. There are four sets of oil-discharging cotton rollers, and the surfaces of the four sets of oil-discharging cotton rollers abut against the surface of the first crane beam.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This invention employs a purely mechanical linkage design, driving the lubrication system through the crane's own motion during operation, eliminating the need for an additional power source. This approach is energy-efficient, environmentally friendly, and reduces maintenance costs. The innovative staggered helical gear transmission, combined with a four-set oil-dispensing cotton roller layout, achieves comprehensive, all-around lubrication coverage of the crane beam, effectively solving the problem of uneven coverage inherent in traditional lubrication methods. The modular lubrication components can be flexibly adjusted according to different working conditions. At normal temperatures, polyurethane synchronous belts and conventional lubricants are used, while at high temperatures, they can be upgraded to ceramic ratchet wheels, graphite lubricants, and a water-cooling system, demonstrating exceptional adaptability. Practical verification has shown that this mechanism significantly extends the service life of the crane beam, achieving three months of maintenance-free operation in port settings and maintaining stable performance even in high-temperature metallurgical environments. This greatly reduces equipment maintenance frequency and costs, demonstrating significant economic benefits and practical value. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0013] Figure 2 This utility model Figure 1 A schematic diagram of a local structure in the image;

[0014] Figure 3 This utility model Figure 2 A schematic diagram of a local structure in the image;

[0015] Figure 4 This utility model Figure 3 A schematic diagram of a local structure in the image;

[0016] Figure 5 This utility model Figure 4 A partial structural cross-sectional view.

[0017] In the diagram: 1. Hook; 2. Fixed rod; 3. Connecting platform; 4. Second crane beam; 5. Arm; 6. Lubrication mechanism; 601. First support plate; 602. Toothed plate; 603. Second support plate; 604. Third support plate; 605. Fourth support plate; 606. First interlocking helical gear; 607. Ratchet; 608. Third rotating rod; 609. Second rotating rod; 610. Second interlocking helical gear; 611. Synchronous pulley; 612. Synchronous belt; 613. First rotating rod; 7. First crane beam; 8. Lubrication assembly; 801. Oil outlet roller; 802. Oil storage chamber. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-5 The technical solution provided by this utility model specifically includes the following embodiments:

[0020] Example: A crane beam for a double-girder crane includes a first crane beam 7, a second crane beam 4 slidably connected to the surface of the first crane beam 7, a boom 5 fixedly connected to the top of the first crane beam 7, a connecting platform 3 fixedly connected to the top of the boom 5, a fixing rod 2 rotatably connected to the inner wall of the connecting platform 3, a hook 1 provided on the surface of the fixing rod 2, and a lubrication mechanism 6 provided on the surface of the first crane beam 7.

[0021] The lubrication mechanism 6 includes a first support plate 601, a toothed plate 602 fixedly connected to the inner wall of the first support plate 601, first rotating rods 613 movably connected to the left and right sides of the second crane beam 4 via bearings, a ratchet 607 fixedly connected to one end of the first rotating rod 613, the surface of the ratchet 607 meshing with the surface of the toothed plate 602, second support plates 603 fixedly connected to the front and rear sides of the left and right sides of the second crane beam 4, a third support plate 604 fixedly connected to the top of the second support plate 603, a second rotating rod 609 movably connected to the inner wall of the third support plate 604 via bearings, a fourth support plate 605 fixedly connected to the left rear side and right front side of the top of the second crane beam 4, a third rotating rod 608 movably connected to the inner wall of the fourth support plate 605 via bearings, and lubrication components 8 fixedly sleeved on the surfaces of the second rotating rod 609 and the third rotating rod 608.

[0022] When the second crane beam 4 slides along the first crane beam 7, the ratchet 607 on both sides of it meshes with the toothed plate 602 fixed on the first support plate 601, forcing the first rotating rod 613 to rotate. Through the transmission of the synchronous pulley 611 and the synchronous belt 612, the second rotating rod 609 rotates synchronously. Since the second interlocking helical gear 610 meshes with the first interlocking helical gear 606, the third rotating rod 608 rotates in the opposite direction, driving the four sets of lubrication components 8 to work synchronously. The oil-dispensing cotton roller 801 is in close contact with the surface of the first crane beam 7, and the lubricating oil in the oil storage chamber 802 slowly seeps out through the cotton material and is evenly coated on the surface of the beam, reducing sliding friction. This process does not require external power and is automatically triggered by the movement of the beam. It is suitable for frequent movement conditions, such as material handling in a workshop.

[0023] The surface of the third rotating rod 608 is fixedly fitted with a first interlaced helical gear 606, and the surface of the second rotating rod 609 is fixedly fitted with a second interlaced helical gear 610. The surface of the second interlaced helical gear 610 meshes with the surface of the first interlaced helical gear 606.

[0024] The lubrication mechanism 6 uses two sets of interlocking helical gears to link different rotating rods. When the second crane beam 4 slides to the left, the ratchet 607 rotates clockwise and transmits the rotation to the second rotating rod 609 via the synchronous belt 612. Then, through gear meshing, the third rotating rod 608 rotates counterclockwise. The four sets of oil-dispensing cotton rollers 801 roll in two different directions to ensure that the top, bottom, and sides of the first crane beam 7 are covered. The oil storage chamber 802 adopts a porous permeation design, and the lubricating oil is automatically replenished according to the pressure difference. This design is particularly suitable for heavy load scenarios, such as the hoisting of large components in steel plants, and can effectively deal with the problem of uneven lubrication caused by the deformation of the beam due to load.

[0025] Synchronous pulleys 611 are fixedly fitted on the surfaces of the first rotating rod 613 and the second rotating rod 609. Synchronous belts 612 are movably fitted on the surfaces of the synchronous pulleys 611. Several toothed grooves are opened on the surface of the synchronous pulleys 611. The inner ring of the synchronous belts 612 meshes with the surface of the synchronous pulleys 611.

[0026] In the high-temperature environment of the metallurgical workshop, the lubrication mechanism 6 is equipped with a heat-resistant coating, the ratchet 607 is made of ceramic material, and the toothed plate 602 is sprayed with aluminum-silicon alloy, which can stably mesh at 300℃. The oil storage cavity 802 inside the oil cotton roller 801 is filled with graphite-based lubricant, which forms a solid lubricating film at high temperature. When the width of the first crane beam 7 increases by 5% due to thermal expansion, the elastic synchronous belt 612 can still maintain transmission efficiency. In addition, the fourth support plate 605 adopts a water-cooled jacket design, which protects the bearings through circulating coolant and ensures reliability during continuous operation next to the continuous casting machine.

[0027] The lubrication assembly 8 includes an oil-discharging cotton roller 801, the surface of which abuts against the surface of the first crane beam 7. An oil storage cavity 802 is fixedly provided on the inner wall of the oil-discharging cotton roller 801. There are four sets of oil-discharging cotton rollers 801, and the surfaces of the four sets of oil-discharging cotton rollers 801 abut against the surface of the first crane beam 7.

[0028] The oil reservoir 802 of the lubrication component 8 is designed to be detachable, which facilitates the regular addition of high-viscosity grease. The oil outlet cotton roller 801 is wrapped with a wear-resistant carbon fiber layer, with a life of more than 5,000 cycles. Actual tests show that in port container hoisting, the mechanism can work continuously for 3 months without oiling, and there is no visible wear on the beam surface. The synchronous belt 612 is made of polyurethane material, which is moisture-proof and rust-proof and can adapt to ambient temperatures from -20℃ to 60℃.

[0029] The lubrication mechanism of this double-girder crane achieves automated lubrication through a mechanical linkage design. Its core lies in using the relative motion of the crane beams to drive the lubrication components. When the second crane beam 4 slides along the first crane beam 7, the ratchet 607 fixed to both sides of the beam engages with the toothed plate 602, driving the first rotating rod 613 to rotate. Then, through the transmission of the synchronous belt 612 and the interlaced helical gear set, the four sets of oil-dispensing cotton rollers 801 operate synchronously in different directions. The lubrication component 8 adopts a design combining a porous, permeable oil storage chamber 802 with the cotton rollers, which can evenly release lubricating oil to the contact surface of the beam, effectively reducing sliding friction. This mechanism has three major technical advantages: firstly, it is a completely mechanical transmission, requiring no external power, relying on the crane's own movement... First, it achieves lubrication; second, it adopts an interlaced gear and multi-set cotton roller layout to ensure all-round lubrication coverage of the upper, lower and side beams, which is particularly suitable for beam deformation under heavy loads; third, the modular design takes into account environmental adaptability, the oil storage chamber is detachable for easy maintenance, the synchronous belt is made of elastic polyurethane material to withstand temperature changes, and in high-temperature environments it can be upgraded to ceramic ratchet, graphite lubrication and water-cooled support plate and other configurations. Practical applications have shown that the mechanism performs well in harsh working conditions such as ports and metallurgy, can work continuously for 3 months without maintenance in container hoisting scenarios, and can still maintain stable lubrication performance in high-temperature environments. The overall design cleverly integrates mechanical automation, materials science and thermal management technology, which significantly improves the life and reliability of the crane's sliding parts.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A crane beam for a double-girder crane, characterized in that: The first crane beam (7) is slidably connected to the surface of the first crane beam (7), and the top of the first crane beam (7) is fixedly connected to the boom (5). The top of the boom (5) is fixedly connected to the connecting platform (3), and the inner wall of the connecting platform (3) is rotatably connected to the fixing rod (2). The surface of the fixing rod (2) is provided with a hook (1), and the surface of the first crane beam (7) is provided with a lubrication mechanism (6).

2. A crane beam for a double-girder crane according to claim 1, characterized in that: The lubrication mechanism (6) includes a first support plate (601), a toothed plate (602) is fixedly connected to the inner wall of the first support plate (601), and first rotating rods (613) are movably provided on both the left and right sides of the second crane beam (4) through bearings. A ratchet (607) is fixedly connected to one end of the first rotating rod (613), and the surface of the ratchet (607) meshes with the surface of the toothed plate (602). Second support plates (603) are fixedly connected to the front and rear sides of both the left and right sides of the second crane beam (4). The top of the second support plate (603) is fixedly provided with a third support plate (604). The inner wall of the third support plate (604) is movably connected to a second rotating rod (609) through a bearing. The left rear side and right front side of the top of the second crane beam (4) are both fixedly connected with a fourth support plate (605). The inner wall of the fourth support plate (605) is movably connected to a third rotating rod (608) through a bearing. The surfaces of the second rotating rod (609) and the third rotating rod (608) are both fixedly fitted with lubrication components (8).

3. A crane beam for a double-girder crane according to claim 2, characterized in that: The surface of the third rotating rod (608) is fixedly fitted with a first interlaced helical gear (606), and the surface of the second rotating rod (609) is fixedly fitted with a second interlaced helical gear (610). The surface of the second interlaced helical gear (610) meshes with the surface of the first interlaced helical gear (606).

4. A crane beam for a double-girder crane according to claim 2, characterized in that: The surfaces of the first rotating rod (613) and the second rotating rod (609) are both fixedly fitted with synchronous pulleys (611), and the surfaces of the synchronous pulleys (611) are movably fitted with synchronous belts (612).

5. A crane beam for a double-girder crane according to claim 4, characterized in that: The surface of the synchronous pulley (611) is provided with several toothed grooves, and the inner ring of the synchronous belt (612) meshes with the surface of the synchronous pulley (611).

6. A crane beam for a double-girder crane according to claim 2, characterized in that: The lubrication assembly (8) includes an oil-dispensing cotton roller (801), the surface of which abuts against the surface of the first crane beam (7), and an oil storage cavity (802) is fixedly provided on the inner wall of the oil-dispensing cotton roller (801). There are four sets of oil-dispensing cotton rollers (801), and the surfaces of the four sets of oil-dispensing cotton rollers (801) abut against the surface of the first crane beam (7).

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