Split heavy duty wheel support

Abstract

The application discloses a split heavy-load wheel supporting device, and belongs to the technical field of crane wheels. The split heavy-load wheel supporting device comprises a mounting hole arranged in the lower part of a web plate, a positioning disc fixed in the mounting hole through a first fastener, a wheel shaft fixed between the two positioning discs through a second fastener, a wheel supporting body sleeved on the outer periphery of the middle part of the wheel shaft, and a roller assembly abutting to the outer peripheral surface of the wheel supporting body. The application adopts the annular series roller assembly to replace the traditional integral wheel body. After local wear, only a single damaged cylindrical roller needs to be replaced, and the wheel does not need to be replaced as a whole. The intact parts can be reused. Meanwhile, the wheel shaft can be laterally extracted and disassembled, and the whole machine does not need to be jacked up or the end beam does not need to be disassembled. The on-site maintenance is convenient and efficient, and the whole life cycle operation and maintenance cost is greatly reduced.

Description

Technical Field

[0001] This invention belongs to the field of crane wheel technology, and particularly relates to a split-type heavy-duty wheel support device. Background Technology

[0002] Wheel assemblies are core components of the traveling mechanisms in heavy engineering fields such as cranes, port transportation equipment, and mining equipment. Their structural form and performance level directly determine the overall operational reliability, load-bearing capacity, and life-cycle economics of the machine. As the heavy equipment industry develops towards higher load capacities, compactness, and lower maintenance costs, the industry is placing higher demands on the structural compactness, load-bearing adaptability, and on-site maintainability of wheel assemblies. The currently mainstream driven-axle wheel assembly technology is gradually becoming insufficient to meet the comprehensive performance requirements of high-end working conditions. Its inherent shortcomings in structural cost, maintenance efficiency, and load-bearing characteristics are becoming increasingly apparent, necessitating technological breakthroughs in new wheel structures.

[0003] Existing wheel assemblies are mostly driven axle-type wheel sets with bearing housings on both sides. These assemblies have numerous components, complex structures, and high manufacturing costs. Furthermore, the wheel bodies are often made of integral forged steel, resulting in cumbersome manufacturing processes, large machining allowances, and long production cycles. Additionally, when severe localized wear occurs during operation, the integral wheel body cannot be replaced locally; the entire wheel set must be disassembled and replaced, leading to difficult disassembly and assembly, low reuse rates of intact parts, resource waste, and high maintenance costs. Moreover, traditional wheel-rail point contact has a small effective contact area. Under high wheel pressure conditions, the overall wheel size needs to be increased to meet load-bearing requirements, thus raising the overall height of the equipment and restricting the overall structural layout design. The point contact design also requires high precision in rail installation, making construction and commissioning difficult. Furthermore, existing wheels cannot adaptively adjust to stress conditions, making them prone to localized overload deformation or damage, resulting in insufficient operational stability. Therefore, there is an urgent need for a split-type heavy-duty wheel support device. Summary of the Invention

[0004] To address some or all of the technical problems existing in the prior art, the present invention provides a split-type heavy-duty wheel support device. The split-type heavy-duty wheel support device is connected to the end beam of the frame. Two parallel web plates are vertically arranged at the bottom of the end beam. The web plates are arranged above the track. The split-type heavy-duty wheel support device includes a mounting hole opened in the lower part of the web plate, a positioning plate fixed in the mounting hole by a first fastener, a wheel axle fixed between the two positioning plates by a second fastener, a wheel support body sleeved on the outer periphery of the middle part of the wheel axle, and a roller assembly abutting against the outer periphery of the wheel support body. The roller assembly is arranged between the wheel support body and the track. The roller assembly includes multiple chain plates and cylindrical rollers hinged between adjacent chain plates. The inner ends of the cylindrical rollers are rotatably connected to a spindle through bearings. The cylindrical rollers are hinged to the chain plates through the spindles. Protrusions are provided at the edges of both ends of the cylindrical rollers. The outer periphery of the wheel support body abuts between two protrusions.

[0005] Furthermore, in the aforementioned split-type heavy-duty wheel support device, a lubricating bushing is provided between the wheel support body and the wheel axle.

[0006] Furthermore, in the aforementioned split-type heavy-duty wheel support device, the middle part of the lubrication bushing is a split structure, with positioning blocks provided on the outer sides of both ends, and positioning grooves provided on the inner sides of both ends of the wheel support body, with the positioning blocks embedded in the positioning grooves.

[0007] Furthermore, in the aforementioned split-type heavy-duty wheel support device, an adjusting sleeve fitted around the outer periphery of the wheel axle is provided between the positioning disc and the wheel support body.

[0008] Furthermore, in the above-mentioned split-type heavy-duty wheel support device, one end of the positioning plate is provided with an end plate, and the other end is provided with a fixing groove. The end plate is fixed to the web plate by a first fastener, and the end of the wheel axle is embedded in the fixing groove and fixed by a second fastener.

[0009] Furthermore, in the aforementioned split-type heavy-duty wheel support device, the axis of the outer circumferential surface of the positioning plate is eccentrically set with respect to the axis of the inner circumferential surface of the fixing groove.

[0010] Furthermore, in the aforementioned split-type heavy-duty wheel support device, the cylindrical roller has an I-shaped cross-section.

[0011] Furthermore, in the aforementioned split-type heavy-duty wheel support device, the cross-section of the wheel support body perpendicular to the axial direction is elliptical.

[0012] Furthermore, in the aforementioned split-type heavy-duty wheel support device, the axial length of the wheel axle is less than the distance between the inner sides of the two web plates.

[0013] The split-type heavy-duty wheel support device of the present invention has the following advantages and positive effects: (1) The present invention uses a ring-connected roller assembly to replace the traditional integral wheel body. After local wear, only a single damaged cylindrical roller needs to be replaced, without replacing the entire wheel. Intact parts can be reused. At the same time, the wheel axle can be pulled out and disassembled laterally without lifting the whole machine or disassembling the end beam. On-site maintenance is convenient and efficient, greatly reducing the maintenance cost throughout the entire life cycle. (2) The roller assembly of the present invention forms a multi-point line contact with the track, which effectively disperses the wheel pressure load, optimizes the contact stress distribution, and can reduce the overall size of the wheel under the same load requirements, avoid raising the height of the whole machine, adapt to the compact overall layout requirements, and is especially suitable for high wheel pressure heavy load conditions. (3) The wheel support body of the present invention can swing slightly around the wheel axle, which can automatically adjust the force state, so that the load of each cylindrical roller is evenly distributed, avoiding local roller overload damage. At the same time, it can absorb the influence of the off-center load caused by the track installation deviation, reduce the requirements for track installation accuracy, and reduce the difficulty of on-site construction and debugging. (4) The positioning plate of the present invention adopts an eccentric structure design, which can adjust the wheel installation height and horizontal position, compensate for processing and installation errors, avoid rail biting problems, and can flexibly adjust the wheel axial span with the adjustment sleeve. It can be adapted to end beams and rails of different specifications and has a wide range of applications. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a schematic diagram of the structure of the split heavy-duty wheel support device of the present invention; Figure 2 This is a side view of the split heavy-duty wheel support device of the present invention.

[0015] Explanation of reference numerals in the attached figures: 1. Wheel support; 2. Wheel axle; 3. Roller assembly; 31. Bearing; 32. Cylindrical roller; 33. Spindle; 34. Chain plate; 4. Adjusting sleeve; 5. Positioning plate; 6. Lubrication bushing; 7. First fastener; 8. Second fastener; 9. Web plate; 10. Track. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0017] This invention provides a split-type heavy-duty wheel support device, such as... Figure 1 , Figure 2 As shown, the split-type heavy-duty wheel support device is connected to the end beam of the frame. Two parallel web plates 9 are vertically arranged at the bottom of the end beam, positioned above the track 10. The split-type heavy-duty wheel support device includes a mounting hole in the lower part of the web plate 9, a positioning disc 5 fixed in the mounting hole by a first fastener 7, a wheel axle 2 fixed between the two positioning discs 5 by a second fastener 8, a wheel support body 1 sleeved on the outer periphery of the middle part of the wheel axle 2, and a roller assembly 3 abutting against the outer periphery of the wheel support body 1. The roller assembly 3 is positioned between the wheel support body 1 and the track 10. The roller assembly 3 includes multiple chain plates 34 and cylindrical rollers 32 hinged between adjacent chain plates 34. The cylindrical rollers 32 have shafts at both ends inside. The bearing 31 is rotatably connected to the spindle 33, and the cylindrical roller 32 is hinged to the chain plate 34 via the spindle 33. This structure allows the cylindrical roller 32 to rotate around its own spindle 33 and also to revolve around the outer periphery of the wheel support 1 along the annular chain. Through the combined motion of rotation and revolution, the wheel assembly can travel continuously and smoothly along the track 10. The cylindrical roller 32 has protrusions at both ends, and the outer periphery of the wheel support 1 abuts against the area between the two protrusions. The protrusions on both sides can axially limit the wheel support 1, preventing the roller assembly 3 from axially shifting relative to the wheel support 1 during operation and ensuring the stability of the motion trajectory. Simultaneously, when the I-shaped cylindrical roller 32 is engaged with the track 10, the protrusions at both ends can engage with the sides of the head of the track 10, providing lateral guidance and effectively preventing derailment during wheel operation, thus improving the safety of the operation.

[0018] In one specific embodiment, in the split heavy-duty wheel support device of the present invention, a lubricating bushing 6 is provided between the wheel support body 1 and the wheel axle 2. The lubricating bushing 6 has good friction reduction and load-bearing performance, which can reduce the frictional resistance when the wheel support body 1 swings relative to the wheel axle 2, reduce wear on the mating surfaces, and stably transmit radial loads. At the same time, it can isolate external dust, rainwater and other impurities from entering the mating surfaces, protect the mating surfaces from corrosion, and extend the service life of the components. The wheel support body 1 can swing slightly around the wheel axle 2 through the lubricating bushing 6, and has an adaptive self-aligning function. When there is an installation deviation in the track 10 or the load is uneven, the wheel support body 1 can automatically adjust the swing angle so that the outer roller assembly 3 always maintains a uniform contact force state, and evenly distributes the load to each load-bearing roller, avoiding deformation or damage of individual rollers due to overload. At the same time, it effectively absorbs the vibration and impact during operation, improving the stability and reliability of the device operation.

[0019] As a specific embodiment, in the split heavy-duty wheel support device of the present invention, the lubrication bushing 6 has a split structure in the middle, and positioning blocks are provided on the outer sides of both ends. Positioning grooves are provided on the inner sides of both ends of the wheel support body 1. The positioning blocks are embedded in the positioning grooves to realize the axial positioning of the lubrication bushing 6 and the wheel support body 1, prevent the lubrication bushing 6 from axially moving during relative motion, and ensure the stability and reliability of the lubrication fit.

[0020] In one specific embodiment, in the split-type heavy-duty wheel support device of the present invention, an adjusting sleeve 4 is provided between the positioning disc 5 and the wheel support body 1, sleeved on the outer periphery of the wheel axle 2. Its two ends abut against the inner end face of the positioning disc 5 and the side end face of the lubrication bushing 6, respectively. By selecting adjusting sleeves 4 with different axial specifications, the axial position of the wheel support body 1 on the wheel axle 2 can be flexibly adjusted, thereby precisely controlling the installation span of the entire wheel device to adapt to rails 10 of different widths and end beam webs 9 with different spacing, improving the device's adaptability to various working conditions.

[0021] In one specific embodiment, in the split heavy-duty wheel support device of the present invention, the positioning plate 5 has an end plate at one end and a fixing groove at the other end. The end plate is fixed to the web plate 9 by the first fastener 7. During assembly, the inner end face of the end plate is attached to the outer side of the web plate 9. The first fastener 7 passes through the end plate and the web plate 9 to lock and fix them, ensuring the connection strength between the positioning plate 5 and the web plate 9. It can stably bear the combined radial and axial loads and avoid loosening and movement during operation. The end of the wheel axle 2 is embedded in the fixing groove and fixed by the second fastener 8, so that the wheel axle 2 is horizontally mounted between the two web plates 9, serving as the central bearing shaft of the entire device and providing a stable transmission path for the upper load.

[0022] In one specific embodiment, in the split heavy-duty wheel support device of the present invention, the axis of the outer peripheral surface of the positioning disk 5 is eccentrically set with the axis of the inner peripheral surface of the fixing groove. With this setting, by rotating and adjusting the installation angle of the positioning disk 5 in the mounting hole, the spatial position of the fixing groove can be changed, thereby adjusting the installation height and horizontal position of the wheel axle 2. This can effectively compensate for the processing error of the end beam web 9 and the installation deviation of the rail 10, avoid problems such as rail biting and uneven load during wheel operation, significantly reduce the requirements for the processing accuracy of the web 9 and the installation accuracy of the rail 10, and reduce the workload of on-site construction and debugging.

[0023] In one specific embodiment, in the split heavy-duty wheel support device of the present invention, the cylindrical roller 32 has an I-shaped cross-section.

[0024] In one specific embodiment, in the split-type heavy-duty wheel support device of the present invention, the cross-section of the wheel support body 1 perpendicular to the axial direction is elliptical, and the roller assembly 3 is fitted onto the outer periphery of the elliptical contour, enabling stable cyclic revolution along the contour surface. The elliptical contour design allows the roller assembly 3 to form multiple uniform contacts in the load-bearing area, effectively dispersing the upper load, optimizing the contact stress distribution, and improving the overall load-bearing performance of the device.

[0025] In one specific implementation, in the split heavy-duty wheel support device of the present invention, the axial length of the wheel axle 2 is less than the distance between the inner sides of the two web plates 9. When the device needs to be overhauled or its components replaced, it is only necessary to remove the first fasteners 7 of the positioning discs 5 on both sides and take the positioning discs 5 out of the mounting holes. The wheel axle 2, together with the wheel support body 1, roller assembly 3 and other components mounted on it, can be pulled out of the lateral space of the web plate 9 as a whole. There is no need to disassemble the main structure of the end beam or lift the whole machine, which greatly reduces the difficulty of on-site disassembly and assembly operations and improves maintenance efficiency.

[0026] The working principle of the split heavy-duty wheel support device of the present invention is as follows: When the whole machine is working, the upper load borne by the end beam of the frame is transmitted to the positioning discs 5 on both sides through the web plate 9, and then to the wheel axle 2 through the positioning discs 5. The wheel axle 2 transmits the load to the wheel support body 1 through the lubricating bushing 6, and finally to the outer roller assembly 3 through the wheel support body 1. The cylindrical rollers 32 evenly transmit the load to the track 10. During the movement, the cylindrical rollers 32 rotate around their own spindle 33, and at the same time, the roller assembly 3 as a whole revolves along the elliptical contour of the wheel support body 1 to achieve continuous movement along the track 10.

[0027] When localized wear occurs during long-term operation of the device, if the wear of a single cylindrical roller 32 exceeds the limit, it is only necessary to disassemble the corresponding chain plate 34 connection, remove the damaged cylindrical roller 32, and replace it with a new one. There is no need to replace the entire wheel assembly; the remaining intact parts can continue to be used, effectively reducing maintenance costs and resource consumption. If a comprehensive overhaul of the device's interior is required, the internal components can be pulled out laterally after removing the fasteners from the two side positioning discs 5. The operation process is simple and suitable for rapid on-site maintenance.

[0028] In summary, compared with the prior art, the split-type heavy-duty wheel support device of the present invention has the following advantages and positive effects: (1) The present invention uses a ring-connected roller assembly 3 to replace the traditional integral wheel body. After local wear, only a single damaged cylindrical roller 32 needs to be replaced, without replacing the entire wheel. Intact parts can be reused. At the same time, the wheel axle 2 can be pulled out and disassembled laterally without lifting the whole machine or disassembling the end beam. On-site maintenance is convenient and efficient, greatly reducing the maintenance cost throughout the entire life cycle. (2) The roller assembly 3 of the present invention forms a multi-point line contact with the track 10, which effectively disperses the wheel pressure load, optimizes the contact stress distribution, and can reduce the overall size of the wheel under the same load requirements, avoid raising the height of the whole machine, adapt to the compact overall layout requirements, and is especially suitable for high wheel pressure heavy load conditions. (3) The wheel support body 1 of the present invention can swing slightly around the wheel axle 2, which can automatically adjust the force state, so that the load of each cylindrical roller 32 is evenly distributed, avoiding local roller overload damage. At the same time, it can absorb the off-center load caused by the installation deviation of the track 10, reduce the requirements for the installation accuracy of the track 10, and reduce the difficulty of on-site construction and debugging. (4) The positioning disk 5 of the present invention adopts an eccentric structure design, which can adjust the wheel installation height and horizontal position, compensate for processing and installation errors, avoid rail biting problems, and, together with the adjustment sleeve 4, can flexibly adjust the wheel shaft 2 span, which can be adapted to different specifications of end beams and rails 10, and has a wide range of applications.

[0029] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A split heavy-duty wheel supporting device connected to an end sill of a vehicle frame, the end sill having two parallel webs vertically arranged at the bottom of the end sill, the webs being arranged above a rail, characterized in that, The split-type heavy-duty wheel support device includes a mounting hole in the lower part of the web, a positioning plate fixed in the mounting hole by a first fastener, a wheel axle fixed between the two positioning plates by a second fastener, a wheel support body sleeved on the outer periphery of the middle part of the wheel axle, and a roller assembly abutting against the outer periphery of the wheel support body. The roller assembly is disposed between the wheel support body and the track. The roller assembly includes multiple chain plates and cylindrical rollers hinged between adjacent chain plates. The inner ends of the cylindrical rollers are rotatably connected to a spindle through bearings. The cylindrical rollers are hinged to the chain plates through the spindles. The edges of the cylindrical rollers are provided with protrusions, and the outer periphery of the wheel support body abuts between two protrusions.

2. The split heavy duty wheel support of claim 1, wherein, A lubricating bushing is provided between the wheel support and the wheel axle.

3. The split heavy duty wheel support of claim 2, wherein, The lubrication bushing has a split structure in the middle, with positioning blocks on the outer sides of both ends, and positioning grooves on the inner sides of both ends of the wheel support body, with the positioning blocks embedded in the positioning grooves.

4. The split heavy duty wheel support of claim 1 wherein, An adjusting sleeve is provided between the positioning plate and the wheel support body, and is fitted around the outer circumference of the wheel axle.

5. The split heavy duty wheel support of claim 1 wherein, The positioning plate has an end plate at one end and a fixing groove at the other end. The end plate is fixed to the web plate by a first fastener. The end of the wheel axle is embedded in the fixing groove and fixed by a second fastener.

6. The split heavy duty wheel support of claim 5, wherein, The axis of the outer circumference of the positioning plate is eccentrically set with respect to the axis of the inner circumference of the fixing groove.

7. The split heavy duty wheel support of claim 1 wherein, The cylindrical roller has an I-shaped cross-section.

8. The split heavy duty wheel support of claim 1, wherein, The cross-section of the wheel support body perpendicular to the axial direction is elliptical.

9. The split heavy duty wheel support of claim 1 wherein, The axial length of the wheel axle is less than the distance between the inner sides of the two webs.

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