A combined wheel for remanufacturing waste crane wheels

Abstract

The present invention discloses a modular wheel for remanufacturing scrap crane wheels, comprising a modular wheel inner ring, a modular wheel outer ring, a tensioning connection assembly, and a U-groove working sleeve. The center hole of the modular wheel inner ring is connected to the crane axle, the modular wheel inner ring and two modular wheel outer rings are connected via a tensioning connection assembly, and the U-groove working sleeve is mounted on the U-shaped surface of the outer ring of the modular wheel outer ring. The U-groove working sleeve is used to mate with an external track. Compared with the prior art, the present invention facilitates the installation and removal of the axle and the inner hole of the modular wheel inner ring, and the modular wheel outer ring and the working sleeve. The entire wheel assembly does not need to be disassembled for maintenance and wheel replacement. The wheel or working sleeve can be replaced online, significantly reducing maintenance time and production downtime, and significantly improving production efficiency. Furthermore, the use of scrap wheels for reprocessing not only allows for the recycling of scrap crane wheels, but also significantly increases the wheel's service life.

Description

Technical Field

[0001] The invention belongs to the field of crane wheels, in particular to a combined wheel remanufactured from waste crane wheels. Background Art

[0002] Wheel replacement, due to wheel wear, accounts for a significant portion of crane operating and maintenance costs. Disassembly and reassembly during the replacement process are time-consuming, labor-intensive, and involve confined working space and overhead work. Each wheel replacement requires 8-10 fitters and 8-10 hours of maintenance time. In particular, prolonged downtime for maintenance after a wheel failure in the crane's running mechanism can result in significant financial losses for steel mills. Furthermore, wheel replacement requires the entire wheel assembly to be disassembled and hoisted to a designated location. The axle and bearings must then be removed before the new wheel, along with the axle and bearings, can be reassembled. Therefore, the quality and performance of large cast crane wheels are crucial. Improving the strength, hardness, and hardened layer depth of the tread working layer of crane wheels, as well as improving their wear resistance, can extend wheel life, reduce replacement frequency, and ultimately reduce costs and increase efficiency for steel mills.

[0003] Currently, one-piece forged wheels generally use materials such as 42CrMo and 65Mn, and the forging and heat treatment processes are relatively mature, leaving little room for further performance improvement in their working layer. If the original working layer of scrapped crane wheels is removed and the wheel tread annular working sleeve is separately forged and heat-treated using Cr3 and Cr5 support rollers discarded by steel mills, the working layer's grain size, yield strength, tensile strength, hardness uniformity, and hardened layer depth can be improved. This working sleeve, assembled integrally with the wheel inner ring and axle through mechanical tensioning, can not only improve and enhance the performance of the wheel tread working layer, but also enable rapid and efficient replacement and assembly of the wheel working layer without disassembling the axle. Summary of the Invention

[0004] The present invention aims to provide a new modular wheel for remanufacturing scrap crane wheels. This can improve and enhance the performance of the wheel tread working layer, and enable the rapid and efficient replacement and assembly of the wheel working layer without disassembling the axle.

[0005] The technical solution for achieving the purpose of the present invention is: a modular wheel for remanufacturing waste crane wheels, including a modular wheel inner ring, a modular wheel outer ring, a tensioning connection assembly, and a U-shaped groove working sleeve; the center hole of the modular wheel inner ring is connected to the crane axle, the modular wheel inner ring and the two modular wheel outer rings are connected by a tensioning connection assembly, the U-shaped groove working sleeve is installed on the U-shaped surface of the outer ring of the modular wheel outer ring, and the U-shaped groove working sleeve is used to cooperate with the external track.

[0006] Furthermore, the inner ring of the combined wheel is a symmetrical structure with the central plane in the thickness direction of the wheel as the symmetry plane, with an annular boss arranged in the middle and through holes evenly distributed on the boss.

[0007] Furthermore, symmetrical annular ramp structures are provided on both sides of the annular boss of the inner ring of the combined wheel; the inner ring of the outer ring of the combined wheel is provided with an annular ramp structure and the ramp structure is symmetrical with the central plane in the thickness direction of the wheel as the symmetry plane.

[0008] Furthermore, the tensioning connection assembly includes a tensioning ring; the tensioning ring is an annular structure with the combined wheel as the axis, the inner ring and the outer ring of the tensioning ring are both provided with inclined surfaces and the inclined surfaces are symmetrical with the central plane in the thickness direction of the wheel as the symmetry plane, and are used to cooperate with the inner ring and the outer ring of the combined wheel.

[0009] Furthermore, threaded holes and through holes are evenly spaced on the tensioning ring. During installation, the threaded holes on one tensioning ring on both sides of the inner ring of the combined wheel are aligned with the axes of the through holes on the other tensioning ring.

[0010] Furthermore, the tensioning connection assembly also includes screws and spring washers; during installation, the screw rod passes through the spring washer, the through hole on the tensioning ring, the through hole on the inner ring boss of the combined wheel, and the threaded hole on the tensioning ring on the other side in sequence, and the screw is gradually tightened so that the distance between the tensioning rings on both sides gradually becomes smaller.

[0011] Furthermore, a groove is machined on the combined wheel inner ring and the combined wheel outer ring in a direction perpendicular to the end face to release stress generated during the installation process.

[0012] Furthermore, the surfaces of the U-groove working sleeve and the combined wheel outer ring that cooperate with each other are set to a tapered structure, wherein the U-shaped cross-sectional opening of the U-groove working sleeve is larger than the bottom, and the U-shaped cross-sectional opening of the combined wheel outer ring is smaller than the bottom; this is used to enable the U-groove working sleeve to have an automatic centering function after installation; and the two sides of the U-groove working sleeve are squeezed inward by the two combined wheel outer rings.

[0013] Furthermore, it also includes a pressure-injection oil cup and an annular oil-storage porous friction-reducing ring; the outer corners of the U-groove working sleeve are machined with chamfers, and after assembly, a closed oil storage cavity is formed with the transition fillet inside the outer ring of the combined wheel to store lubricating oil; an oil filling hole is machined on the side of the outer ring of the combined wheel for installing a straight-through pressure-injection oil cup, and the oil cup 6 is opened to inject lubricating oil into the closed oil storage cavity.

[0014] Furthermore, it also includes an annular oil storage type porous anti-friction ring, an annular groove is processed at the rounded corner of the U-shaped groove type working sleeve, and the annular groove is connected to the closed oil storage cavity through an oil hole; an annular oil storage type porous anti-friction ring is installed in the annular groove, and the material of the annular oil storage type porous anti-friction ring 8 is a porous cotton sheet, which realizes lubrication between the U-shaped groove type working sleeve and the external track.

[0015] Compared with the prior art, the present invention has the following significant advantages:

[0016] 1. The structure of the combined wheel, comprising a modular wheel inner ring, a modular wheel outer ring, and a tensioning connection assembly, facilitates installation and removal of the axle from the inner hole of the modular wheel inner ring and from the modular wheel outer ring to the work sleeve. Maintenance and replacement of wheels do not require disassembly of the entire wheel assembly. This allows for online wheel or work sleeve replacement, significantly reducing maintenance time and production downtime, and significantly improving production efficiency. The interference fit between the wheel axle and the modular wheel inner ring is achieved using the simple tensioning principle, avoiding the complex and costly press-fit process.

[0017] 2. The combined wheel of the present invention is made by reprocessing waste wheels. The worn and failed parts of the waste wheels only account for a small part of the entire wheel, and the rest can be recycled. Only high-performance U-shaped groove working sleeves are manufactured separately, which improves the strength, wear resistance and other working performance of the working layer. Not only can waste crane wheels be recycled, but the service life of the wheels can also be greatly extended.

[0018] 3. The mating surface of the U-groove working sleeve and the combined wheel inner ring of the present invention is designed to be a tapered structure, which has an automatic centering function. After assembly is completed, the two sides of the U-groove working sleeve are squeezed inward by the two combined wheel outer rings, and the working sleeve is in a state of micro-compressive stress, which is beneficial to suppressing the initiation and expansion of fatigue cracks and can increase the service life of the working sleeve.

[0019] 4. The present invention provides a lubrication structure at the corner of the U-groove working sleeve. When the wheel and rail move along the wheel axis, the anti-friction cotton sheet first contacts the side of the crane rail. After being squeezed, the lubricating oil flows along the side of the rail and the wheel rim, providing targeted lubrication only on the side of the rail and the wheel rim. This can effectively reduce the sliding friction coefficient between the wheel rim and the side of the crane rail, and has a significant effect on alleviating severe dry sliding friction wear on the wheel rim side. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the three-dimensional structure of the combined wheel of the present invention;

[0021] Figure 2 A two-dimensional structural cross-sectional view of the combined wheel of the present invention;

[0022] Figure 3Schematic diagram of the two-dimensional structure of the combined wheel of the present invention;

[0023] Figure 4 This is an enlarged view of the local structure of the combined wheel of the present invention. Figure 1 ;

[0024] Figure 5 This is an enlarged view of the local structure of the combined wheel of the present invention. Figure 2 ;

[0025] Figure 6 A two-dimensional partial view of the combined wheel of the present invention;

[0026] Figure 7 This is a schematic diagram of the combined wheel inner ring (inner tensioning sleeve);

[0027] Figure 8 Schematic diagram of the tensioning ring;

[0028] Figure 9 Schematic diagram of the combined wheel outer ring (external tensioning sleeve);

[0029] Figure 10 It is a schematic diagram of a U-shaped groove type working sleeve;

[0030] Figure 11 Schematic diagram of the structure of the hexagonal cylindrical head screw for connection;

[0031] Figure 12 This is a schematic diagram of the structure of a heavy-duty spring washer;

[0032] Figure 13 This is a schematic diagram of the straight-through pressure injection oil cup structure;

[0033] Figure 14 Schematic diagram of the structure of an annular oil storage porous anti-friction ring.

[0034] Reference numerals:

[0035] 1-Assembled wheel inner ring (inner tensioning sleeve); 2-Hexagonal cylindrical head screw; 3-Heavy-duty spring washer; 4-Tensioning ring; 5-Assembled wheel outer ring (outer tensioning sleeve); 6-Straight-through pressure injection oil cup; 7-U-shaped groove working sleeve; 8-Annular oil storage porous anti-friction ring; DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-14 The present invention is further described with reference to the accompanying drawings and specific embodiments.

[0037] The present invention is a modular wheel for remanufacturing waste crane wheels. It can improve and enhance the performance of the crane wheel tread working layer and enable the independent, rapid and efficient replacement and assembly and disassembly of the wheel working layer without disassembling the axle.

[0038] A modular wheel for remanufacturing waste crane wheels mainly comprises a modular wheel inner ring (inner tensioning sleeve) 1, a modular wheel outer ring (outer tensioning sleeve) 5, a tensioning connection assembly, a straight-through pressure-injection oil cup 6, a U-shaped groove working sleeve 7, and an annular oil storage porous friction-reducing ring 8.

[0039] The combined wheel inner ring 1 is an axisymmetric structure symmetrical about the thickness center plane, with an annular boss arranged in the middle, and the boss is evenly distributed with six through holes. The middle hole of the combined wheel inner ring 1 is mounted on the axle.

[0040] Combined wheel outer rings 5 ​​, each combined wheel is provided with two combined wheel outer rings 5 ​​, which are symmetrically arranged outside the combined wheel inner ring 1 and connected to the combined wheel inner ring 1 through a tensioning connection assembly.

[0041] like Figure 4 As shown, the contact surface between the inner ring 1 of the combined wheel and the tensioning ring 4 in the tensioning connection assembly is a tapered annular slope structure; the contact surface between the outer ring 5 of the combined wheel and the tensioning ring 4 in the tensioning connection assembly is a tapered annular slope structure.

[0042] The tensioning connection assembly includes: a hexagonal cylindrical head screw 2, a heavy spring washer 3 and a tensioning ring 4;

[0043] The tensioning ring 4 is an annular structure centered on the assembled wheel. After assembly, the inner bevel of the tensioning ring 4 contacts the annular slope of the assembled wheel inner ring 1, while the outer bevel of the tensioning ring 4 contacts the inner annular slope of the assembled wheel outer ring 5. The tensioning ring 4 has three threaded holes and three through holes evenly spaced apart.

[0044] When the wheel is assembled, the tensioning rings 4 are symmetrically arranged on both sides of the combined wheel inner ring 1, and the threaded hole on the tensioning ring 4 on one side is aligned with the central axis of the through hole on the tensioning ring on the other side; the hexagonal cylindrical head screws 2 are distributed on both sides of the tensioning ring 4, with three evenly distributed on each side; the screw of the hexagonal cylindrical head screw 2 passes through the heavy spring washer 3, the through hole on the tensioning ring 4, the through hole on the boss of the combined wheel inner ring 1 and the threaded hole on the tensioning ring 4 on the other side in sequence, and the hexagonal cylindrical head screw 2 is gradually tightened so that the distance between the tensioning rings 4 on both sides gradually becomes smaller, and the outer ring inclined surfaces of the tensioning rings on both sides squeeze the inner ring inclined surfaces of the two combined wheel outer rings 5 ​​toward each other, and the inner ring inclined surfaces of the tensioning rings on both sides squeeze the inclined surfaces of the combined wheel inner ring 1 toward each other, and then rely on the plane pressure and friction generated during tightening to achieve the connection between the combined wheel inner ring (inner tensioning sleeve) 1 and the combined wheel outer ring (outer tensioning sleeve) 5.

[0045] After assembly, the annular slope structure of the combined wheel inner ring 1 and the two combined wheel outer rings 5 ​​forms a small middle space and large spaces on both sides; the two tensioning rings 4 form a structure with a small middle entity and a large outer ring entity.

[0046] Heavy-duty spring washer 3: The structure is the same as that of ordinary spring washers, suitable for larger loads and vibration environments.

[0047] like Figure 6 As shown, the inner ring 1 of the combined wheel is machined with a small groove perpendicular to the end face to release the stress generated during the installation process; Figure 8 As shown, a small groove is machined into the outer ring 5 of the combined wheel in a direction perpendicular to the end face to release the stress generated during the installation process.

[0048] The outer rings of the two symmetrically arranged combined wheel outer rings 5 ​​cooperate with the U-shaped groove type working sleeve 7; Figure 5 As shown, the outer ring surfaces of the two combined wheel outer rings 5 ​​are provided with a taper, so that the U-shaped cross-section communicating between the two combined wheel outer rings 5 ​​has a small opening and a large bottom;

[0049] like Figure 3 As shown, the U-shaped groove working sleeve 7 and the internal matching surface of the combined wheel outer ring 5 are designed to have a tapered structure with a larger outer side and a smaller inner side (so that the U-shaped cross-section opening of the U-shaped groove working sleeve 7 is larger and the bottom is smaller), so that the U-shaped cross-section opening is larger than the bottom, so that it has an automatic centering function after installation; after the assembly is completed, the two sides of the U-shaped groove working sleeve 7 are squeezed inward by the two combined wheel outer rings, and the working sleeve is in a state of micro-compression stress, so that the fit is reliable, and the U-shaped groove working sleeve 7 is restricted from coming out of the outer rings of the two symmetrically arranged combined wheel outer rings 5 ​​(as shown in FIG. Figure 5 shown).

[0050] The U-shaped groove type working sleeve 7 is cut and processed with a large bevel chamfer at the outer corner. After assembly, it forms a closed oil storage cavity with the transition fillet inside the outer ring 5 of the combined wheel to store lubricating oil (such as Figure 3 shown);

[0051] An oil filling hole is processed on the side of the combined wheel outer ring 5 for installing a straight-through pressure oil filling cup 6. By opening the oil cup 6, lubricating oil can be injected into the closed oil storage cavity formed by the U-shaped groove working sleeve 7 and the inner transition fillet of the combined wheel outer ring 5.

[0052] An annular groove is machined at the rounded corner of the U-shaped groove working sleeve 7, and the annular groove is connected to the oil storage cavity through an oil hole; an annular oil storage type porous anti-friction ring 8 is installed in the annular groove, and the material of the annular oil storage type porous anti-friction ring 8 is a porous cotton sheet to achieve lubrication between the U-shaped groove working sleeve and the external track.

[0053] When the wheel and rail move axially, the annular, oil-reservoir, porous anti-friction ring 8 first contacts the side of the crane rail. Lubricating oil is squeezed and flows along the rail side and wheel rim, providing targeted lubrication only to the rail side and wheel rim. (The wheel tread and rail tread should not be lubricated, otherwise the wheel will slip on the rail.) This effectively reduces the coefficient of sliding friction between the wheel rim and the crane rail side, significantly alleviating severe dry sliding friction wear on the wheel rim side.

[0054] The present invention utilizes waste crane wheels, cuts off the worn area (working layer), and then replaces the original wheel working layer with a separately forged, heat-treated, high-strength, high-wear-resistant annular U-shaped grooved working sleeve. This not only greatly increases the service life of the wheel, but also allows the annular working sleeve to be quickly replaced after reaching the end of its service life, without having to replace other parts of the wheel, thus significantly reducing material consumption.

[0055] The internal sleeve combined wheel can achieve efficient interference fit between the wheel and the axle, and between the wheel and the annular working sleeve, and can realize rapid, efficient and non-destructive online disassembly, which can significantly reduce wheel maintenance time and downtime;

[0056] The outer rim of the combined wheel is machined with an oiling hole to accommodate a straight-through pressure-filled oiling cup (GB152). A large chamfer is machined at the outer corner of the U-groove sleeve. After assembly, this creates a closed oil storage cavity with the inner radius of the combined wheel outer rim. An annular groove is machined into the radius of the U-groove sleeve, housing a porous cotton pad. This annular groove connects to the oil storage cavity via an oil hole. When the wheel and track move axially, the friction-reducing cotton pad first contacts the side of the crane track. After being squeezed, the lubricating oil flows along the track side and wheel rim, providing targeted lubrication only to the track side and wheel rim. (The wheel tread and track tread cannot be lubricated, otherwise the wheel will slip on the track.) This effectively reduces the coefficient of sliding friction between the wheel rim and the side of the crane track, significantly alleviating severe dry sliding friction wear on the wheel rim.

[0057] The above shows and describes the basic principles, main features, and advantages of this invention. This invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of this invention. Various changes and improvements are possible without departing from the spirit and scope of this invention. Such changes and improvements are within the scope of the invention claimed. The scope of protection claimed is defined by the appended claims and their equivalents.

Claims

1. A modular wheel remanufactured from scrap crane wheels, characterized in that: The U-shaped groove working sleeve comprises a combined wheel inner ring, a combined wheel outer ring, a tensioning connection assembly, and a U-shaped groove working sleeve; the center hole of the combined wheel inner ring is connected to the crane axle, the combined wheel inner ring and the two combined wheel outer rings are connected by a tensioning connection assembly, the U-shaped groove working sleeve is installed on the U-shaped surface of the outer ring of the combined wheel outer ring through the tensioning connection assembly, and the U-shaped groove working sleeve is used to cooperate with the external track; the surfaces of the combined wheel outer rings that cooperate with each other are all set to a tapered structure, the U-shaped cross-section opening of the U-shaped groove working sleeve is larger than the bottom, and the U-shaped cross-section opening of the outer ring of the combined wheel outer ring is smaller than the bottom, so that the U-shaped groove working sleeve has an automatic centering function after installation; the two sides of the U-shaped groove working sleeve are squeezed inward by the two combined wheel outer rings, so that the working sleeve is in a micro-compressive stress state, which is used to suppress the initiation and expansion of fatigue cracks and increase the service life of the working sleeve; Among them, the U-shaped groove type working sleeve is made by cutting off the worn area of ​​the waste crane wheel and then processing it; A groove is machined on the inner ring and outer ring of the combined wheel in a direction perpendicular to the end face to release stress generated during installation; The combined wheel also includes a pressure-injection oil cup; a chamfered surface is provided at the outer corner of the U-shaped groove working sleeve, which, after assembly, forms a closed oil storage cavity with the transition fillet inside the outer ring of the combined wheel for storing lubricating oil; an oil filling hole is machined on the side of the outer ring of the combined wheel, and a straight-through pressure-injection oil cup is installed to inject lubricating oil into the closed oil storage cavity; The combined wheel also includes an annular oil-storage porous anti-friction ring. An annular groove is processed at the rounded corner of the U-shaped groove working sleeve, and the annular groove is connected to the closed oil storage cavity through an oil hole. An annular oil-storage porous anti-friction ring is installed in the annular groove. The material of the annular oil-storage porous anti-friction ring is a porous cotton sheet, which realizes lubrication between the U-shaped groove working sleeve and the external track.

2. The combined wheel remanufactured from scrap crane wheels according to claim 1, characterized in that: The inner ring of the combined wheel is a symmetrical structure with the central plane in the thickness direction of the wheel as the symmetry plane, with an annular boss arranged in the middle and through holes evenly distributed on the boss.

3. The combined wheel remanufactured from scrap crane wheels according to claim 1, characterized in that: Symmetrical annular slope structures are provided on both sides of the annular boss of the inner ring of the combined wheel; the inner ring of the outer ring of the combined wheel is also provided with an annular slope structure and the slope structure is symmetrical with the central plane in the thickness direction of the wheel as the symmetry plane.

4. The combined wheel remanufactured from scrap crane wheels according to claim 1, characterized in that: The tensioning connection assembly includes a tensioning ring; the tensioning ring is an annular structure with the axis of the combined wheel as the axis center, the inner ring and the outer ring of the tensioning ring are both provided with inclined surfaces, and the inclined surfaces are symmetrical with the central plane in the thickness direction of the wheel as the symmetry plane, and are used to cooperate with the inner ring and the outer ring of the combined wheel.

5. The combined wheel remanufactured from scrap crane wheels according to claim 4, characterized in that: The threaded holes and through holes are evenly spaced on the tensioning ring. During installation, the threaded holes on one side of the tensioning ring located on both sides of the inner ring of the combined wheel are aligned with the axes of the through holes on the other side of the tensioning ring.

6. The combined wheel remanufactured from scrap crane wheels according to claim 4, characterized in that: The tensioning connection assembly also includes screws and spring washers. During installation, the screw rod passes through the spring washer, the through hole on the tensioning ring, the through hole on the boss of the inner ring of the combined wheel, and the threaded hole on the tensioning ring on the other side in sequence. The screw is gradually tightened so that the distance between the tensioning rings on both sides gradually becomes smaller.

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