Mine car wheel repairing device
By designing a mine car wheel repair device, utilizing a rotary positioning mechanism and MIG welding technology, the problem of frequent replacement of worn mine car wheels was solved, improving repair efficiency and wear resistance, and reducing operating costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG JIANHUI MINING CONSTRUCTION GROUP CO LTD
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-12
AI Technical Summary
In existing technologies, severe wear on mining car wheels leads to frequent replacements, increasing operating costs and safety hazards. Traditional repair methods suffer from problems such as reduced material toughness, peeling of wear-resistant coatings, and inconvenient positioning.
设计了一种矿车轮修复装置，利用旋转定位机构和伺服电机驱动矿车轮转动，进行加宽加厚修复，采用二保焊堆焊技术在轮辋磨损部位堆焊耐磨材料，并在外圈机械加工钢筋以提高耐磨性能。
It achieves high-precision positioning, reduces rotational vibration, improves repair efficiency, extends wheel life, and reduces maintenance costs.
Smart Images
Figure CN224222924U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mining machinery maintenance technology, specifically a mine car wheel repair device. Background Technology
[0002] As the component of an electric mining car that directly contacts the track, the wheels are subjected to complex mechanical stresses, friction, and impact loads over a long period, resulting in widespread wear. Severe wheel wear can not only cause the locomotive to derail, disrupting transportation, but may even lead to major safety accidents such as equipment damage and personal injury. Furthermore, frequent replacement of worn wheels consumes significant manpower and resources, increases operating costs for enterprises, and has many adverse effects on production.
[0003] In the study of wear mechanisms, theories from materials mechanics and tribology were used to deeply analyze the stress distribution, frictional characteristics, and material failure mechanisms during wheel wear. Regarding solutions, on the one hand, efforts were made to improve wheel wear resistance by developing new wear-resistant materials and optimizing wheel manufacturing processes; on the other hand, abnormal forces between wheels and tracks were reduced and wear was decreased by improving track structure and optimizing locomotive operation control strategies. Traditional solutions primarily involve replacing wheels directly after they have worn to a certain extent. While simple and direct, this method is costly, requiring not only the purchase of new wheels but also significant manpower and time for replacement. Furthermore, frequent wheel replacements increase locomotive downtime, impacting production efficiency; alternatively, single wear-resistant technologies such as surface hardening treatment or adding wear-resistant coatings can be used to improve wheel wear resistance.
[0004] However, these technologies have certain limitations in practical applications. For example, surface hardening treatment may reduce the toughness of the wheel material, increasing the risk of wheel breakage; the adhesion and durability of wear-resistant coatings are limited, and they are prone to peeling off under complex working conditions, failing to fundamentally solve the problems of wheel wear and derailment. Furthermore, due to the metal material of the wheels, there are problems such as insufficient positioning and inconvenient movement and adjustment during maintenance.
[0005] Therefore, this technical solution addresses the above-mentioned problems by designing a mine car wheel repair device. Summary of the Invention
[0006] The purpose of this invention is to provide a mine car wheel repair device to solve the problems mentioned in the background art.
[0007] To achieve the above objectives, this utility model provides the following technical solution:
[0008] A mine car wheel repair device includes a mine car wheel and a repair platform. A rotary positioning mechanism is installed on the top of the repair platform. The wheel hub (which is connected to the axle of the locomotive to transmit power, and the mine car wheel is removed from the axle during repair, at which point its center is in a through-hole state) of the mine car wheel to be repaired is inserted into the outside of the rotary positioning mechanism. The rotary positioning mechanism expands radially to support and fix the wheel wheel. A servo motor installed on the top of the repair platform is connected to one side of the rotary positioning mechanism. The servo motor is started to drive the rotary positioning mechanism to control the rotation of the fixed mine car wheel, thereby widening and thickening the rim (the part of the wheel that directly contacts the rail, whose surface quality and geometry are crucial to the wear resistance and running stability of the wheel). Specifically, a layer of wear-resistant material is welded onto the worn part of the rim, and then steel bars are machined on the outer ring to widen and thicken it.
[0009] In this embodiment of the invention, the hub and the rim are connected by spokes. A support sleeve with its bottom fixed to the top of the repair platform is mounted on the output shaft located on the upper side of the repair platform to maintain the stability of the output shaft. At the same time, balance tubes are mounted on both sides of the support sleeve to increase the gravity at the output shaft located on the upper side of the repair platform, so as to ensure the balance of both sides of the output shaft after the rotary positioning mechanism placed outside the repair platform is fixed to the mine car wheel.
[0010] Compared with the prior art, the beneficial effects of this utility model are: by radially expanding the arc-shaped positioning block, it can adapt to wheel hubs of different diameters, and the positioning accuracy is ≤0.5mm;
[0011] Rotational vibration is reduced by using a support sleeve and a balance tube.
[0012] By combining it with MIG welding, repair efficiency can be improved, wheel life can be extended, and maintenance costs can be reduced. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the connection and distribution structure between the mine car and the repair platform in a mine car repair device.
[0014] Figure 2 A side view schematic diagram of the connection distribution between the mine car and the repair platform in a mine car repair device;
[0015] Figure 3 This is a front view schematic diagram of the connection between a mine car wheel and a repair platform in a mine car wheel repair device.
[0016] Figure 4 This is a partial structural diagram of the rotary positioning mechanism in a mine car wheel repair device;
[0017] Figure 5 A schematic diagram of a mine car wheel repair device that thickens and widens the mine car wheel after welding reinforcing bars;
[0018] Among them: mine car wheel 10, repair platform 12, servo motor 13, output shaft 14, balance tube 15, screw 16, fixed ring 17, moving ring 18, threaded power ring 19, swing shaft block 20, swing shaft 21, U-shaped swing frame 22, arc-shaped positioning block 23, limit rotation ring 24, limit rotation groove 25, and steel bar 26. Detailed Implementation
[0019] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0020] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0022] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.
[0023] Please see Figures 1-5A mine car wheel repair device includes a mine car wheel 10 and a repair platform 12. A rotary positioning mechanism is installed on the top of the repair platform 12. The hub of the mine car wheel 10 to be repaired (the hub is connected to the axle of the locomotive to realize the transmission of power. During repair, the mine car wheel 10 is removed from the axle, and its center is in a through state) is inserted into the outside of the rotary positioning mechanism. The rotary positioning mechanism expands radially to support and fix it. A servo motor 13 is connected to one side of the rotary positioning mechanism and installed on the top of the repair platform 12. The servo motor 13 is started to drive the rotary positioning mechanism to control the fixed mine car wheel 10 to rotate, thereby widening and thickening its rim (the part of the wheel that directly contacts the rail, whose surface quality and geometry are crucial to the wear resistance and running stability of the wheel). That is, a layer of wear-resistant material is welded to the worn part of the rim, and then steel bars 26 are machined on the outer ring to widen and thicken it.
[0024] In this embodiment of the invention, the hub and the rim are connected by spokes. A support sleeve with its bottom fixed to the top of the repair platform 12 is mounted on the output shaft 14 located on the upper side of the repair platform 12 to maintain the stability of the output shaft 14. At the same time, balance tubes 15 are mounted on both sides of the support sleeve to increase the gravity at the output shaft 14 located on the upper side of the repair platform 12, so as to ensure the balance of both sides of the output shaft 14 after the rotation positioning mechanism placed outside the repair platform 12 is fixed to the mine car wheel 10.
[0025] In a preferred embodiment of the present invention, the rotary positioning mechanism includes an output shaft 14 connected to the output end of the servo motor 13. The end of the output shaft 14 extends to the outside of the top of the repair table 12. A screw cylinder 16 is fixedly installed on the outside of the output shaft 14, which is located in the area outside the top of the repair table 12. A fixing ring 17 is fixedly installed on the end of the screw cylinder 16 away from the servo motor 13. A movable ring 18 is slidably fitted on the screw cylinder 16 located on one side of the fixing ring 17. A threaded power ring 19 is rotatably connected to the upper limit of the side wall of the movable ring 18 away from the fixing ring 17. The threaded power ring 19 is threadedly connected to the screw cylinder 16. The manual rotation of the threaded power ring 19 controls its movement along the axis of the screw barrel 16, and drives the moving ring 18 to move synchronously. The fixed ring 17 and the moving ring 18 are connected by multiple sets of swing connectors with multiple arc-shaped positioning blocks 23 at equal intervals. Due to the fixed connection between the fixed ring 17 and the screw barrel 16 and the sliding connection between the moving ring 18 and the screw barrel 16, the swing connectors are controlled to swing synchronously to adjust the angle when the moving ring 18 moves, thereby controlling the arc-shaped positioning blocks 23 to move radially, and realizing the extended support positioning of the inner side of the wheel hub of the mine car 10, which is fitted on the outside of the arc-shaped positioning blocks 23.
[0026] The swing connector includes a swing shaft block 20 installed on the corresponding circumferential outer wall of the fixed ring 17 and the moving ring 18. A U-shaped swing frame 22 is swing-connected to the swing shaft block 20 through a swing shaft 21. The ends of the U-shaped swing frames 22 on both sides near the arc-shaped positioning block 23 are also connected to the bottom of the arc-shaped positioning block 23 through the swing shaft block 20 and the swing shaft 21. That is, by swinging the U-shaped swing frames 22 on both sides, and cooperating with the axial movement of the moving ring 18, the radial height of the arc-shaped positioning block 23 can be adjusted to achieve support and fixation of the inner side of the hub.
[0027] A limiting rotating ring 24 is installed on the side wall of the threaded power ring 19 facing the moving ring 18. A limiting rotating groove 25 is provided in the side wall of the moving ring 18 corresponding to the limiting rotating ring 24, which is rotatably connected to the limiting rotating ring 24. The vertical cross section of the limiting rotating ring 24 is set as a T-shaped structure to maintain the limiting connection between the two.
[0028] Multiple through holes are evenly opened on the outer circumferential wall of the threaded power ring 19. The through holes cooperate with the external pry bar to apply sufficient rotational force to the threaded power ring 19, thereby ensuring the contact force between the arc-shaped positioning block 23 and the wheel hub. Then, the return resistance of the threaded connection between the threaded power ring 19 and the screw barrel 16 is used to ensure the stability of the arc-shaped positioning block 23 in positioning the wheel hub.
[0029] As a preferred embodiment of the present invention, in one example of the present invention, it should be noted that, for the widening and thickening repair process, when the rim wear is relatively severe, the double-shielded welding repair technology is adopted. At the same time, before the steel bar 26 is processed on the outside of the rim of the mine car wheel 10, it can be bent into a circle by a bending machine, and then welded to the outer ring of the rim. At the same time, it is necessary to ensure that the mine car wheel 10 meets the specified size and precision requirements to achieve the effect of not easily derailing.
[0030] Secondly, for wheels with slight wear, after positioning the mine wheel 10 on the upper side of the repair table 12, the wear layer can be removed by turning to restore the geometry of the wheel.
[0031] MIG / MAG (Metallic Optical Fusion) welding repair technology is a semi-automatic arc welding process that uses CO2 as a shielding gas to repair worn, corroded, or defective parts. It is characterized by high efficiency, low cost, and applicability to carbon steel and low-alloy steel welding. MIG / MAG welding repair is a conventional repair technique and will not be elaborated upon further here.
[0032] As a preferred embodiment of the present invention, the widening and thickening repair process is as follows: (1) Preliminary preparation
[0033] Rim surface treatment:
[0034] Cleaning: Use an angle grinder or sandblaster to remove rust, oil, and oxide layers from the rim surface to expose the metal substrate.
[0035] Inspect for wear: Use calipers to measure the thickness and width of the rim and mark areas of severe wear (such as local dents or cracks).
[0036] (2) Material selection and pretreatment of steel bar 26
[0037] The material of the 26 steel bar must match the base material of the wheel rim (e.g., if the wheel rim is Q235 steel, use welding rods / wires of the same material or low alloy steel).
[0038] The diameter of the reinforcing bar is selected according to the repair thickness (usually Φ10-16mm), and the length is cut into sections according to the circumference of the wheel rim.
[0039] Pre-treatment: Use a hydraulic pipe bending machine to pre-bend the steel bars into a curve that matches the arc of the wheel rim (error ≤ 2mm).
[0040] End face grinding: The two ends of the steel bar are cut into 45° bevels to facilitate welding fusion (bevel gap 1-2mm).
[0041] (3) Reinforcing bar positioning and fixing
[0042] Positioning markings: Draw evenly on the surface of the wheel rim the lines for the location of the steel reinforcement welding (50-80mm spacing, covering the wear area).
[0043] Fix 10 to one side of 12 and spot weld every 200mm (weld length 10-15mm) to prevent displacement.
[0044] Welding process
[0045] Welding method selection: Gas shielded welding (MAG): Using ER50-6 welding wire, CO2 gas protection, high efficiency, and less spatter.
[0046] Parameter control:
[0047] Current: Φ3.2mm welding rod, 90-120A; Φ1.2mm welding wire, 180-220A.
[0048] Voltage: Arc voltage 22-28V, short arc operation to avoid air bubbles.
[0049] Welding sequence:
[0050] The segmented back welding method is adopted, with each segment having a welding length of ≤50mm, and welding is performed symmetrically to reduce thermal deformation.
[0051] Multi-layer, multi-pass welding: The first layer is a root pass weld (filling 80% of the bevel), and the temperature between subsequent passes is controlled to ≤150℃.
[0052] (5) Post-weld treatment
[0053] Stress relief: Flame heating: Use an oxyacetylene flame to locally heat the weld area to 600-650℃, then hold and cool slowly.
[0054] Vibration aging: Use vibration equipment to eliminate residual stress (optional).
[0055] Machining: Turning repair: Turn the outer diameter to the design dimension (tolerance ±0.5mm).
[0056] Use an angle grinder to trim the excess weld height to ensure a smooth surface (roughness Ra≤12.5μm).
[0057] (6) Non-destructive testing
[0058] Ultrasonic testing (UT): Detects porosity and slag inclusions inside welds (acceptance criteria according to AWS D1.1).
[0059] Magnetic particle inspection (MT): Inspecting surface microcracks.
[0060] Dynamic balancing test: When the wheel speed reaches the rated value (e.g., 200 r / min), the imbalance amount is ≤5 g·cm.
[0061] (7) Anti-corrosion treatment
[0062] The repaired area was sandblasted again (Sa2.5 grade) to remove rust.
[0063] Spray with epoxy zinc-rich primer (50μm) + polyurethane topcoat (50μm), or thermally spray with zinc-aluminum alloy coating.
[0064] The above-mentioned rapid positioning and widening / thickening repair treatment for the mine car wheel 10 can effectively reduce maintenance costs and improve production efficiency.
[0065] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.
Claims
1. A mine car wheel repair device, characterized in that, The equipment includes a mine car wheel (10) and a repair platform (12). A rotary positioning mechanism is installed on the top of the repair platform (12). The hub of the mine car wheel (10) to be repaired is inserted into the outside of the rotary positioning mechanism. The rotary positioning mechanism expands radially to support and fix the mine car wheel (10). A servo motor (13) is connected to one side of the rotary positioning mechanism and installed on the top of the repair platform (12). The rim of the mine car wheel (10) is treated with a widening and thickening repair process. A layer of wear-resistant material is welded to the worn part of the rim, and the outer ring is machined with steel bars (26).
2. The mine car wheel repair device according to claim 1, characterized in that, The hub and rim are connected by spokes. The output shaft (14) located on the upper side of the repair platform (12) is supported by a support sleeve rod whose bottom is fixed to the top of the repair platform (12). Balance tubes (15) are fitted on both sides of the support sleeve rod.
3. The mine car wheel repair device according to claim 1, characterized in that, The rotary positioning mechanism includes an output shaft (14) connected to the output end of the servo motor (13). The end of the output shaft (14) extends to the outside of the top of the repair table (12). A screw cylinder (16) is fixedly installed on the outside of the output shaft (14) located in the area outside the top of the repair table (12). A fixed ring (17) is fixedly installed on the end of the screw cylinder (16) away from the servo motor (13). A movable ring (18) is slidably fitted on the screw cylinder (16) on one side of the fixed ring (17). A threaded power ring (19) is rotatably connected to the upper limit of the side wall of the movable ring (18) away from the fixed ring (17). The threaded power ring (19) is threadedly connected to the screw cylinder (16). Multiple arc-shaped positioning blocks (23) are provided at equal intervals in an annular manner between the outer walls of the fixed ring (17) and the movable ring (18) through multiple sets of swing connectors.
4. A mine car wheel repair device according to claim 3, characterized in that, The swing connector includes a swing shaft block (20) installed on the corresponding circumferential outer wall of the fixed ring (17) and the moving ring (18). A U-shaped swing frame (22) is swayed on the swing shaft block (20) via a swing shaft (21). The ends of the U-shaped swing frames (22) on both sides near the arc-shaped positioning block (23) are also connected to the bottom of the arc-shaped positioning block (23) via the swing shaft block (20) and the swing shaft (21).
5. A mine car wheel repair device according to claim 4, characterized in that, The threaded power ring (19) is mounted on the side wall facing the moving ring (18) with a limiting rotating ring (24). The side wall of the moving ring (18) corresponding to the limiting rotating ring (24) is provided with a limiting rotating groove (25) that is rotatably connected to the limiting rotating ring (24). The vertical cross section of the limiting rotating ring (24) is set as a T-shaped structure.
6. A mine car wheel repair device according to claim 5, characterized in that, The threaded power ring (19) has multiple through holes evenly distributed on its outer circumferential wall, and the through holes are engaged with external pry bars.