Heavy load mine dump truck wheel side reducer assembly and wheel side driving system

Abstract

The application provides a heavy-load mine self-unloading vehicle wheel-side reducer assembly and a wheel-side driving system, and belongs to the technical field of wheel-side reducers. The heavy-load mine self-unloading vehicle wheel-side reducer assembly comprises a torsion tube, a first-stage planetary wheel transmission mechanism and a second-stage planetary wheel transmission mechanism. The wheel-side driving system comprises a rack, a wheel hub, a brake sealing mechanism, the heavy-load mine self-unloading vehicle wheel-side reducer assembly and a half shaft. The application can reduce the overall parts, improve the space, reinforce the weak parts on the parts by widening, thickening, adding reinforcing members and the like, better seal the connection, reduce the possibility of structural damage, lubricating liquid leakage and external impurity intrusion, and slow down the wear; meanwhile, the internal heat dissipation is better, so as to comprehensively improve the service life of the whole machine, reduce the operation and maintenance frequency, and improve the use stability.

Description

Technical Field

[0001] This invention belongs to the field of wheel-side reducer technology, specifically relating to a heavy-duty mining dump truck wheel-side reducer assembly and wheel-side drive system. Background Technology

[0002] In large-scale open-pit mining, mining dump trucks are responsible for earthwork and ore transportation. They have large operating loads and significant instantaneous impact loads from starting, stopping, and bumping. In addition, the high ambient temperature and severe dust intrusion in the mining area cause the lubrication system of the wheel-side reducer to be unable to maintain ideal working conditions.

[0003] Traditional wheel-side reducers are limited by their structure, material selection, and sealing and lubrication design, resulting in complex structures with numerous components and weak points in transmission and support parts. Under combined conditions of heavy loads, impacts, high temperatures, poor heat dissipation, and inadequate lubrication, they are prone to premature failure, leading to short overall machine lifespan, high equipment maintenance frequency, and severely restricting the operational stability of mining transportation systems. To address this industry pain point, this invention patent provides a novel heavy-duty mining dump truck wheel-side reducer assembly, aiming to optimize structural performance and improve product quality and service life. Summary of the Invention

[0004] The purpose of this invention is to provide a heavy-duty mining dump truck wheel-side reducer assembly and wheel-side drive system to solve the technical problems of traditional wheel-side reducers in the prior art, which have short service life, high maintenance frequency and poor stability due to complex structure, many parts and many weak points.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A heavy-duty mining dump truck wheel-side reducer assembly is provided, comprising a torque tube, a primary planetary gear transmission mechanism, and a secondary planetary gear transmission mechanism. The primary planetary gear transmission mechanism is located inside the torque tube and is used to connect with the half-shaft to receive power. The secondary planetary gear transmission mechanism is connected to the primary planetary gear transmission mechanism and is used to connect with the wheel hub to transmit power. The primary planetary gear transmission mechanism includes a primary planetary carrier, which is sealed to one end of the torque tube. The secondary planetary gear transmission mechanism includes a secondary gear ring, one end of which is sealed to the torque tube, and the other end is sealed to the wheel hub. The primary planetary carrier, torque tube, and secondary gear ring form a barrel-shaped shell structure fastened to one end of the wheel hub.

[0006] Furthermore, the primary planetary gear transmission mechanism also includes a primary sun gear, multiple primary planet gears, a primary ring gear, and a gear disc. The primary sun gear is used to connect with the half shaft. The multiple primary planet gears are rotatably mounted on the primary planet carrier and arranged around the primary sun gear, and mesh with the primary sun gear. The primary ring gear is rotatably mounted inside the torque tube and located outside the multiple primary planet gears, and meshes with the primary planet gears. The gear disc is located on one side of the primary planet carrier and is connected and fixed to the primary ring gear.

[0007] Furthermore, a pressure plate is provided on the first-stage gear ring, and the gear disc and the pressure plate are detachably connected by the gear disc fastening bolts; the gear disc has a disc-shaped structure and multiple through holes are provided around the center; the first-stage sun gear is connected to the half shaft by a spline.

[0008] Furthermore, the secondary planetary gear transmission mechanism also includes a secondary sun gear, a secondary planetary carrier, and multiple secondary planetary gears. The secondary sun gear is used to be sleeved on the outside of the half shaft and connected to the gear disc; the secondary planetary carrier is used to be connected and fixed to the frame; the multiple secondary planetary gears are rotatably mounted on the secondary planetary carrier and located between the secondary sun gear and the secondary gear ring, and mesh with the secondary gear ring and the secondary sun gear respectively.

[0009] Furthermore, a first-stage planetary carrier is provided with a first-stage planetary gear shaft, a first-stage planetary gear shaft is provided with a first-stage planetary gear bearing, and a first-stage planetary gear is mounted on the first-stage planetary gear bearing; a first-stage cooling oil passage is provided on the first-stage planetary gear shaft, the first-stage cooling oil passage extends from one end of the first-stage planetary gear bearing to the first-stage planetary gear bearing, and a first-stage oil collecting device is provided on the first-stage planetary carrier to collect oil into the first-stage cooling oil passage.

[0010] The secondary planetary carrier is equipped with a secondary planetary gear shaft, the secondary planetary gear shaft is equipped with a secondary planetary gear bearing, the secondary planetary gears are mounted on the secondary planetary gear bearing, the secondary planetary gear shaft is equipped with a secondary cooling oil passage, the secondary cooling oil passage extends from one end of the secondary planetary gear shaft to the secondary planetary gear bearing, and the secondary planetary carrier is equipped with a secondary oil collector to collect oil into the secondary cooling oil passage.

[0011] Furthermore, both the primary and secondary oil collecting components include a mounting plate. The mounting plate has two oil-blocking protrusions spaced apart, forming an oil guiding channel between the two protrusions. One end of the oil guiding channel has a large opening, and the other end has a small opening. The opposite side of the two oil-blocking protrusions is a slope, so that the oil guiding channel has a funnel-shaped groove structure. The side of the two oil-blocking protrusions facing away from the mounting plate is also a slope, and the distance between the part closer to the oil guiding channel and the mounting plate is smaller, and the distance between the part farther away from the primary or secondary planetary gear shaft and the mounting plate is also smaller.

[0012] Furthermore, both the first-stage planetary carrier and the second-stage planetary carrier are provided with axle mounting slots. One end of both the first-stage and second-stage planetary gear axles is inserted into the axle mounting slots and fixed by axle fixing bolts. The first-stage planetary gear axle and the first-stage planetary carrier are sealed by axle sealing rings.

[0013] To achieve the above objectives, the present invention further adopts the following technical solution: A wheel-side drive system is provided, comprising a frame, a wheel hub, a brake sealing mechanism, the aforementioned heavy-duty mining dump truck wheel-side reducer assembly, and a half-shaft. The frame is used for vehicle body connection; the wheel hub is sleeved on one end of the frame and rotatably connected to the frame via a wheel hub positioning bearing; the brake sealing mechanism is located between the frame and the wheel hub; the aforementioned heavy-duty mining dump truck wheel-side reducer assembly is connected and sealed to one end of the wheel hub; the half-shaft passes through the frame, and one end is connected to the heavy-duty mining dump truck wheel-side reducer assembly to transmit power.

[0014] Furthermore, the braking sealing mechanism includes a brake hub, a sealing ring, and a brake. One side of the brake hub is sealed to the wheel hub. The sealing ring is located on the frame and is rotatably sealed to the brake hub. The brake is connected to the frame and the brake hub respectively to brake the wheel hub. A bearing seat is provided in the middle of the half shaft inside the frame. The bearing seat is rotatably connected to the half shaft through the half shaft positioning bearing.

[0015] The secondary planetary carrier has a flange-shaped structure. One end of the frame that is inserted into the hub is a tubular structure with a slot. One end of the secondary planetary carrier is inserted and fixed in the slot and connected and fixed to the frame.

[0016] The hub positioning bearing includes two sets of oppositely arranged tapered roller bearings. One set of tapered roller bearings is limited by a sealing ring, and the slot opening of the frame is provided with an adjusting plate to limit the other set of tapered roller bearings.

[0017] Furthermore, the brake gear hub and the wheel hub are connected by fasteners, and a gear hub sealing ring is provided on the contact surface for sealing; the brake gear hub and the sealing seat ring are connected by an inner floating oil seal for rotational sealing; the brake gear hub and the brake are connected by an outer floating oil seal for rotational sealing.

[0018] The beneficial effects of the heavy-duty mining dump truck wheel-side reducer assembly and wheel-side drive system provided by this invention are as follows: Compared with the prior art, this invention reduces the number of overall parts and increases space by directly exposing and protruding the primary planetary carrier and secondary gear ring as end caps and outer shell. Weak parts of components such as the primary planetary carrier and secondary gear ring can be reinforced by widening, thickening, and adding reinforcing parts. The connection points are also better sealed, reducing the possibility of structural component damage, lubricant leakage, and external impurity intrusion, and slowing down wear. Simultaneously, the direct exposure of the primary planetary carrier and secondary gear ring allows for better internal heat dissipation, thereby comprehensively improving the service life of the entire machine, reducing maintenance frequency, and enhancing operational stability. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a partial cross-sectional view of the heavy-duty mining dump truck wheel-side reducer assembly and wheel-side drive system provided in an embodiment of the present invention.

[0021] Figure 2 This is a partial cross-sectional view of the primary planetary gear transmission mechanism of the heavy-duty mining dump truck wheel-side reducer assembly provided in an embodiment of the present invention.

[0022] Figure 3 This is a partial sectional view of the first-stage planetary gear transmission mechanism of the heavy-duty mining dump truck wheel-side reducer assembly provided in an embodiment of the present invention.

[0023] Figure 4 This is a side view of the primary oil collection component of the heavy-duty mining dump truck wheel-side reducer assembly provided in an embodiment of the present invention.

[0024] The labels for the attached figures are as follows:

[0025] 1. Gear disc; 2. Torque tube; 3. First-stage gear ring; 4. First-stage planetary carrier; 5. First-stage sun gear; 6. Half shaft; 7. First-stage planetary gears; 8. Axle seal; 9. Axle fixing bolt; 10. First-stage planetary gear shaft; 11. First-stage planetary gear bearing; 12. First-stage oil collector; 13. Pressure plate; 14. Gear disc fastening bolt; 15. Second-stage sun gear; 16. Second-stage planetary gear shaft; 17. Second-stage planetary gear bearing; 18. Second-stage planetary gear; 19. Second-stage planetary carrier; 20. Fixing bolt; 21. Second-stage oil collector; 22. Bearing pressure plate; 23. Hub fixing bolt. 24. External floating oil seal; 25. Internal floating oil seal; 26. Frame; 27. Brake; 28. Brake gear hub; 29. ​​Gear hub fastening bolt; 30. Sealing seat ring; 31. Gear hub sealing ring; 32. Half shaft positioning bearing; 33. Wheel hub; 34. Adjusting shim; 35. Bolt; 36. Secondary gear ring; 38. Bearing housing; 39. Bearing housing fastening bolt; 40. Primary cooling oil passage; 41. Secondary cooling oil passage; 42. Mounting plate; 43. Oil baffle protrusion; 44. Oil guide channel; 45. Chip collection groove; 46. Chip collection hole; 47. Magnet. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application.

[0027] It should be further noted that the accompanying drawings and embodiments of the present invention mainly describe the concept of the present invention. Based on this concept, some specific forms and arrangements of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of the present invention, they can implement the above-mentioned specific forms and arrangements in a well-known manner.

[0028] When an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on that other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to that other element. In the description of this invention, "a plurality of" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0029] The present invention will now describe the heavy-duty mining dump truck wheel-side reducer assembly and wheel-side drive system provided by the present invention.

[0030] like Figures 1 to 3 As shown, the heavy-duty mining dump truck wheel-side reducer assembly provided in the first embodiment of the present invention includes a torque tube 2, a primary planetary gear transmission mechanism, and a secondary planetary gear transmission mechanism. The primary planetary gear transmission mechanism is located inside the torque tube 2 and is used to connect with the half-shaft 6 to receive power. The secondary planetary gear transmission mechanism is connected to the primary planetary gear transmission mechanism and is used to connect with the wheel hub 33 to transmit power. The primary planetary gear transmission mechanism includes a primary planetary carrier 4, which is sealed to one end of the torque tube 2. The secondary planetary gear transmission mechanism includes a secondary gear ring 36, which is sealed to the torque tube 2 at one end and sealed to the wheel hub 33 at the other end. The primary planetary carrier 4, the torque tube 2, and the secondary gear ring 36 form a barrel-shaped shell structure fastened to one end of the wheel hub 33.

[0031] Compared with the prior art, the heavy-duty mining dump truck wheel-side reducer assembly provided in this embodiment reduces the number of components and increases space by directly exposing and protruding the first-stage planetary carrier 4 and the second-stage gear ring 36 as end caps and outer shell. Weak parts of components such as the first-stage planetary carrier 4 and the second-stage gear ring 36 can be reinforced by widening, thickening, and adding reinforcing parts. The connection is also better sealed, reducing the possibility of structural component damage, lubricant leakage, and intrusion of external impurities, and slowing down wear. At the same time, the direct exposure of the first-stage planetary carrier 4 and the second-stage gear ring 36 allows for better internal heat dissipation, thereby comprehensively improving the service life of the whole machine, reducing maintenance frequency, and improving operational stability.

[0032] like Figures 1 to 4 As shown, based on the first embodiment, the present invention provides another specific embodiment as follows.

[0033] The primary planetary gear transmission mechanism also includes a primary sun gear 5, multiple primary planetary gears 7, a primary ring gear 3, and a gear disk 1. The primary sun gear 5 is used to connect with the half shaft 6. The multiple primary planetary gears 7 are rotatably mounted on the primary planetary carrier 4 and are arranged around the primary sun gear 5 and mesh with the primary sun gear 5. The primary ring gear 3 is rotatably mounted inside the torque tube 2 and is located outside the multiple primary planetary gears 7 and meshes with the primary planetary gears 7. The gear disk 1 is located on one side of the primary planetary carrier 4 and is connected and fixed to the primary ring gear 3.

[0034] The first-stage gear ring 3 is provided with a pressure plate 13. The gear disc 1 and the pressure plate 13 are detachably connected by the gear disc fastening bolts 14 to facilitate manufacturing and replacement. The gear disc 1 has a disc-shaped structure and multiple through holes around the center to reduce weight and reduce obstruction to the oil. The first-stage sun gear 5 is connected to the half shaft 6 by a spline.

[0035] The secondary planetary gear transmission mechanism also includes a secondary sun gear 15, a secondary planetary carrier 19, and multiple secondary planetary gears 18. The secondary sun gear 15 is used to be sleeved on the outside of the half shaft 6 and connected to the gear disk 1. The secondary planetary carrier 19 is used to be connected and fixed to the frame 26. The multiple secondary planetary gears 18 are rotatably mounted on the secondary planetary carrier 19 and located between the secondary sun gear 15 and the secondary gear ring 36, and mesh with the secondary gear ring 36 and the secondary sun gear 15 respectively.

[0036] There are typically three primary planetary gears 7 and three secondary planetary gears 18 to ensure fewer structural components and a more balanced distribution of forces, thereby improving operational stability. The primary sun gear 5 is connected and fixed to the half-shaft 6 via a spline, and the secondary sun gear 15 is connected and fixed to the gear disc 1 via a spline to balance forces and reduce wear.

[0037] like Figures 1 to 3 As shown, a primary planetary carrier 4 is provided with a primary planetary gear shaft 10, a primary planetary gear shaft 10 is provided with a primary planetary gear bearing 11, and a primary planetary gear 7 is mounted on the primary planetary gear bearing 11; a primary cooling oil passage 40 is provided on the primary planetary gear shaft 10, the primary cooling oil passage 40 extends from one end of the primary planetary gear bearing 11 to the primary planetary gear bearing 11, and a primary oil collector 12 is provided on the primary planetary carrier 4 to collect oil into the primary cooling oil passage 40.

[0038] like Figure 1 As shown, a secondary planetary carrier 19 is equipped with a secondary planetary gear shaft 16, and a secondary planetary gear bearing 17 is mounted on the secondary planetary gear shaft 16. Secondary planetary gears 18 are mounted on the secondary planetary gear bearing 17. A secondary cooling oil passage 41 is provided on the secondary planetary gear shaft 16, extending from one end of the secondary planetary gear shaft 16 to the secondary planetary gear bearing 17. A secondary oil collector 21 is provided on the secondary planetary carrier 19 to collect oil into the secondary cooling oil passage 41. Both the primary planetary gear bearing 11 and the secondary planetary gear bearing 17 are tapered roller bearings.

[0039] In some specific embodiments, such as Figure 4 As shown, both the primary oil collector 12 and the secondary oil collector 21 include a mounting plate 42. The front of the mounting plate 42 is provided with two oil-blocking protrusions 43 spaced apart, forming an oil guide channel 44 between the two oil-blocking protrusions 43. One end of the oil guide channel 44 has a large opening, and the other end has a small opening. The opposite side of the two oil-blocking protrusions 43 is a slope, so that the oil guide channel 44 has a funnel-shaped groove structure. The side of the two oil-blocking protrusions 43 facing away from the mounting plate 42 is also a slope. The closer the part is to the oil guide channel 44, the smaller the distance between it and the mounting plate 42. The farther the part is from the primary planetary gear shaft 10 or the secondary planetary gear shaft 16, the smaller the distance between it and the mounting plate 42.

[0040] During installation, use screws or other fasteners to fix the mounting plate 42 to the primary planetary carrier 4 on one side of the primary planetary gear shaft 10 or the secondary planetary carrier 19 on one side of the secondary planetary gear shaft 16. Align the small opening of the oil guide channel 44 with the inlet of the primary cooling oil channel 40 or the secondary cooling oil channel 41, ensuring that the small opening of the oil guide channel 44 and the inlet of the primary cooling oil channel 40 or the secondary cooling oil channel 41 are on the same line of gravity or centrifugal force. During equipment operation, splashed oil is collected on the mounting plate 42 and the oil baffle protrusion 43, and under the action of gravity or centrifugal force, it gathers in the oil guide channel 44. The oil is then guided through the oil guide channel 44 into the inlet of the primary cooling oil channel 40 or the secondary cooling oil channel 41, and then flows from the other end of the primary cooling oil channel 40 or the secondary cooling oil channel 41 into the primary planetary gear bearing 11 or the secondary planetary gear bearing 17. The use of this type of primary oil collector 12 and secondary oil collector 21 can significantly increase the oil intake of the primary cooling oil passage 40 or the secondary cooling oil passage 41, significantly improve the lubrication and heat dissipation effect, thereby reducing the wear of weak parts such as bearings and helping to extend the service life of the whole machine.

[0041] The oil guide channel 44 is provided with a chip collection groove 45, which is set at an acute angle to the oil flow direction within the oil guide channel 44. The chip collection groove 45 extends to the oil-blocking protrusion 43. A chip collection hole 46 is provided at the contact point between the oil-blocking protrusion 43 and the chip collection groove 45. A magnet mounting groove is provided on the back of the mounting plate 42, and a magnet 47 is installed in the magnet mounting groove. The chip collection hole 46 communicates with both the chip collection groove 45 and the magnet mounting groove. The outer diameter of the magnet 47 is larger than the inner diameter of the chip collection hole 46 to prevent the magnet 47 from falling out of the chip collection hole 46. The chip collection groove 45 can be straight or curved.

[0042] To reduce the possibility of magnetic impurities such as iron filings flowing back along the chip collecting groove 45 during operation, threaded grooves are provided on the inner walls of the chip collecting groove 45 and the chip collecting hole 46. The threaded grooves are preferably in the form of a reverse toothed cross-section, so that magnetic impurities or other non-magnetic impurities flow in the direction of flow into the chip collecting hole 46 without much obstruction, while flowing against the flow direction out of the chip collecting hole 46 and being obstructed by the reverse toothed threaded groove. At the same time, this type of threaded groove can be manufactured using taps or other tapping tools with a reverse toothed cross-section, making production relatively convenient.

[0043] During installation, the mounting plate 42 is fixed to the first-stage planetary carrier 4 on one side of the first-stage planetary gear shaft 10 or the second-stage planetary carrier 19 on one side of the second-stage planetary gear shaft 16 using screws or other fasteners. The magnet 47 is confined between the mounting plate 42 and the planetary carrier and will not fall out.

[0044] During operation, when the oil flows through the oil guide channel 44, magnetic impurities such as iron filings in the oil settle into the chip collection groove 45 under the magnetic force of the magnet. The chip collection groove 45 adopts a zigzag or arc shape to facilitate the entry of magnetic impurities such as iron filings into the chip collection hole 46 along the chip collection groove 45, where they are firmly attracted by the magnet 47 and stored in the chip collection hole 46. This reduces the amount of magnetic impurities such as iron filings entering the primary cooling oil channel 40 or the secondary cooling oil channel 41, reducing the possibility of blockage in the primary cooling oil channel 40 or the secondary cooling oil channel 41. At the same time, it can also reduce the content of magnetic impurities such as iron filings in the oil, reduce the mechanical wear of the whole machine, and extend its service life.

[0045] During maintenance, since the chip collection hole 46, chip collection groove 45 and magnet mounting slot are connected, after removing the mounting plate 42 and taking off the magnet 47, the magnetic impurities such as iron filings can be removed by directly rinsing the chip collection hole 46, which is simple and convenient.

[0046] like Figure 1 As shown, both the first-stage planetary carrier 4 and the second-stage planetary carrier 19 are provided with axle mounting grooves. One end of the first-stage planetary gear axle 10 and the second-stage planetary gear axle 16 are inserted into the axle mounting grooves and fixed by axle fixing bolts 9. The first-stage planetary gear axle 10 and the first-stage planetary carrier 4 are sealed by axle sealing rings 8.

[0047] In some specific embodiments, in the primary planetary gear transmission mechanism, the primary planetary gear shaft 19 is a T-shaped longitudinal section shaft, that is, one end is provided with an annular protrusion for limiting the side of the primary planetary gear bearing 11. The primary planetary gear bearing 11 is a tapered roller bearing. The shaft fixing bolt 9 fixes the primary planetary gear shaft 10 to the primary planetary carrier 4, so that the annular protrusion of the primary planetary gear shaft 10 and the primary planetary carrier 4 cooperate to clamp and press the tapered roller bearing. In the secondary planetary gear transmission mechanism, the secondary planetary gear shaft 16 is also a T-shaped longitudinal section shaft, that is, one end is provided with an annular protrusion for limiting the side of the secondary planetary gear bearing 17. The secondary planetary gear bearing 17 is a tapered roller bearing. The shaft fixing bolt 9 fixes the secondary planetary gear shaft 16 to the secondary planetary carrier 19, so that the annular protrusion of the secondary planetary gear shaft 16 and the secondary planetary carrier 19 cooperate to clamp and press the tapered roller bearing. This allows for controllable preload on the tapered roller bearing by adjusting the tightness of the wheel axle fixing bolt 9 and by adding shims to the wheel axle fixing bolt 9. This ensures stable bearing clearance, avoids excessive clearance or jamming under heavy loads, thereby reducing wear and extending the overall machine life.

[0048] like Figure 1As shown, the wheel-side drive system provided in the second embodiment of the present invention includes a frame 26, a wheel hub 33, a brake sealing mechanism, the aforementioned heavy-duty mining dump truck wheel-side reducer assembly, and a half-shaft 6. The frame 26 is used for vehicle body connection; the wheel hub 33 is sleeved on one end of the frame 26 and rotatably connected to the frame 26 via a wheel hub positioning bearing 23; the brake sealing mechanism is located between the frame 26 and the wheel hub 33; the aforementioned heavy-duty mining dump truck wheel-side reducer assembly is connected and sealed to one end of the wheel hub 33; the half-shaft 6 passes through the frame 26 and one end is connected to the heavy-duty mining dump truck wheel-side reducer assembly to transmit power.

[0049] The braking sealing mechanism includes a brake hub 28, a sealing ring 30, and a brake 27. One side of the brake hub 28 is sealed to the wheel hub 33. The sealing ring 30 is mounted on the frame 26 and is rotatably sealed to the brake hub 28. The brake 27 is connected to both the frame 26 and the brake hub 28 to brake the wheel hub 33. A bearing seat 38 is located in the middle of the half-shaft 6 within the frame 26. The bearing seat 38 is connected to the frame 26 via detachable connections such as bearing seat fastening bolts 39 to facilitate manufacturing and replacement. The bearing seat 38 is rotatably connected to the half-shaft 6 via a half-shaft positioning bearing 32. The part of the half-shaft 6 used for connecting with the half-shaft positioning bearing 32 has a thickened section. The outer diameter of the thickened section is larger than the outer diameters on both sides to facilitate the installation of the half-shaft 6.

[0050] One end of the half-shaft 6 is connected and fixed to a power output device or transmission device such as a motor, engine, or gearbox via a spline, and the other end is connected and fixed to the first-stage sun gear 5 via a spline. Because the half-shaft 6 has a certain length, the bearing housing 38 and the half-shaft positioning bearing 32 can center the half-shaft 6, improving the coaxiality of the splines at both ends of the half-shaft 6. This prevents excessive spline diameter runout due to the half-shaft 6 being too long, which could lead to unstable transmission and premature half-shaft failure. This helps reduce the failure rate and extend the overall machine lifespan.

[0051] To further increase the oil intake of the primary cooling oil passage 40, an oil slinger can be installed on the half-shaft 6 at the position corresponding to the primary oil collector 12, that is, on the half-shaft 6 located outside the primary planetary carrier 4 and close to the primary oil collector 12. The oil slinger is a disc-shaped structure fixed on the half-shaft 6, with its edge bent toward the primary oil collector 12, so that more oil is slinged onto the primary oil collector 12 when the half-shaft 6 rotates.

[0052] Similarly, to further increase the oil intake of the secondary cooling oil passage 41, an oil slinger can be installed on the half shaft 6 at the position corresponding to the secondary oil collector 21, that is, on the half shaft 6 located outside the secondary planetary carrier 19 and close to the secondary oil collector 21. The oil slinger is a disc-shaped structure fixed on the half shaft 6, and its edge is bent towards the secondary oil collector 21, so that more oil is slinged onto the secondary oil collector 21 when the half shaft 6 rotates.

[0053] The secondary planetary carrier 19 has a flange-shaped structure. One end of the frame 26, which is inserted into the hub 33, has a tubular structure and a slot. One end of the secondary planetary carrier 19 is inserted and fixed in the slot and connected and fixed to the frame 26.

[0054] The hub positioning bearing 23 includes two sets of oppositely arranged tapered roller bearings. One set of tapered roller bearings is limited by a sealing ring 30. The slot opening of the frame 26 is provided with an adjusting shim 34 to limit the other set of tapered roller bearings. The adjusting shim 34 is detachably connected to the frame 26 by fasteners such as bolts 35, so that adjusting shims 34 of appropriate thickness and shape can be replaced as needed to adjust the position of the tapered roller bearings. This ensures that the tapered roller bearings provide controllable preload, maintain stable bearing clearance, and avoid excessive clearance or jamming under heavy loads.

[0055] The brake hub 28 and the wheel hub 33 are connected by fasteners such as the hub fastening bolt 29, and a hub sealing ring 31 is provided on the contact surface for sealing; the brake hub 28 and the sealing seat ring 30 are connected by an inner floating oil seal 25 for rotational sealing; the brake hub 28 and the brake 27 are connected by an outer floating oil seal 24 for rotational sealing to prevent oil leakage from the brake 27.

[0056] In some specific embodiments, the primary planetary carrier 4 and the torque tube 2, the torque tube 2 and the secondary gear ring 36, the secondary gear ring 36 and the wheel hub 33, and the wheel hub 33 and the brake gear hub 28 are all connected by fasteners such as bolts. The contact surfaces between them are made of end face grooves, and an outwardly protruding O-ring is embedded in the end face grooves, so that the contact surfaces form a safe and reliable end face static seal, which prevents oil leakage and external impurities from entering, thereby improving the service life of the whole machine.

[0057] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A heavy-duty mining dump truck wheel-side reducer assembly, characterized in that, include: Torque tube (2); A primary planetary gear transmission mechanism is located inside the torque tube (2) and is used to connect with the half shaft (6) to receive power; The secondary planetary gear transmission mechanism is connected to the primary planetary gear transmission mechanism and is used to connect to the hub (33) to transmit power; The primary planetary gear transmission mechanism includes a primary planetary carrier (4), which is sealed to one end of the torque tube (2); the secondary planetary gear transmission mechanism includes a secondary gear ring (36), which is sealed to one end of the torque tube (2) and to the other end of the wheel hub (33); the primary planetary carrier (4), the torque tube (2) and the secondary gear ring (36) form a barrel-shaped shell structure fastened to one end of the wheel hub (33).

2. The heavy-duty mining dump truck wheel-side reducer assembly as described in claim 1, characterized in that, The primary planetary gear transmission mechanism also includes: A primary sun gear (5) is used to connect to the half shaft (6); Multiple first-stage planetary gears (7) are rotatably mounted on the first-stage planetary carrier (4), and are arranged around the first-stage sun gear (5) and mesh with the first-stage sun gear (5); The first-stage gear ring (3) is rotatably disposed inside the torque tube (2) and outside the plurality of first-stage planetary gears (7), and meshes with the first-stage planetary gears (7); The gear disc (1) is located on one side of the first-stage planetary carrier (4) and is connected and fixed to the first-stage gear ring (3).

3. The heavy-duty mining dump truck wheel-side reducer assembly as described in claim 2, characterized in that: The first-stage gear ring (3) is provided with a pressure plate (13), and the gear disc (1) and the pressure plate (13) are detachably connected by gear disc fastening bolts (14); the gear disc (1) is a disc-shaped structure and has multiple through holes around the center; the first-stage sun gear (5) and the half shaft (6) are connected by a spline.

4. The heavy-duty mining dump truck wheel-side reducer assembly as described in claim 2, characterized in that, The secondary planetary gear transmission mechanism also includes: The secondary sun gear (15) is used to be sleeved on the outside of the half shaft (6) and connected to the gear disk (1); Secondary planetary carrier (19) is used to connect and fix it to the frame (26); Multiple secondary planetary gears (18) are rotatably mounted on the secondary planetary carrier (19) and located between the secondary sun gear (15) and the secondary ring gear (36), respectively meshing with the secondary ring gear (36) and the secondary sun gear (15).

5. The heavy-duty mining dump truck wheel-side reducer assembly as described in claim 4, characterized in that: The first-stage planetary carrier (4) is provided with a first-stage planetary gear shaft (10), the first-stage planetary gear shaft (10) is provided with a first-stage planetary gear bearing (11), and the first-stage planetary gear (7) is mounted on the first-stage planetary gear bearing (11); the first-stage planetary gear shaft (10) is provided with a first-stage heat dissipation oil passage (40), the first-stage heat dissipation oil passage (40) extends from one end of the first-stage planetary gear bearing (11) to the first-stage planetary gear bearing (11), and the first-stage planetary carrier (4) is provided with a first-stage oil collector (12) for collecting oil into the first-stage heat dissipation oil passage (40); The secondary planetary carrier (19) is provided with a secondary planetary gear shaft (16), the secondary planetary gear shaft (16) is provided with a secondary planetary gear bearing (17), the secondary planetary gear (18) is mounted on the secondary planetary gear bearing (17), the secondary planetary gear shaft (16) is provided with a secondary cooling oil passage (41), the secondary cooling oil passage (41) extends from one end of the secondary planetary gear shaft (16) to the secondary planetary gear bearing (17), and the secondary planetary carrier (19) is provided with a secondary oil collector (21) for collecting oil into the secondary cooling oil passage (41).

6. The heavy-duty mining dump truck wheel-side reducer assembly as described in claim 5, characterized in that, Both the primary oil collecting component (12) and the secondary oil collecting component (21) include a mounting plate (42). The mounting plate (42) is provided with two oil-blocking protrusions (43) spaced apart. An oil guiding channel (44) is formed between the two oil-blocking protrusions (43). One end of the oil guiding channel (44) is a large opening and the other end is a small opening. The opposite side of the two oil-blocking protrusions (43) is a slope, so that the oil guiding channel (44) has a trumpet-shaped groove structure. The side of the two oil-blocking protrusions (43) facing away from the mounting plate (42) is also a slope. The closer the part is to the oil guiding channel (44), the smaller the distance between it and the mounting plate (42). The farther the part is from the primary planetary gear shaft (10) or the secondary planetary gear shaft (16), the smaller the distance between it and the mounting plate (42).

7. The heavy-duty mining dump truck wheel-side reducer assembly as described in claim 4, characterized in that: Both the primary planetary carrier (4) and the secondary planetary carrier (19) are provided with axle mounting grooves. One end of the primary planetary gear axle (10) and the secondary planetary gear axle (16) are inserted into the axle mounting groove and fixed by axle fixing bolts (9). The primary planetary gear axle (10) and the primary planetary carrier (4) are sealed by axle sealing rings (8).

8. A wheel-side drive system, characterized in that, include: Frame (26), used for vehicle body connection; The hub (33) is sleeved on one end of the frame (26) and is rotatably connected to the frame (26) via a hub positioning bearing (23); A braking sealing mechanism is provided between the frame (26) and the wheel hub (33); The heavy-duty mining dump truck wheel-side reducer assembly as described in any one of claims 1-7 is connected and sealed to one end of the wheel hub (33); The half-shaft (6) is installed inside the frame (26) and one end is connected to the wheel-side reducer assembly of the heavy-duty mining dump truck to transmit power.

9. The wheel-side drive system as described in claim 8, characterized in that, The braking sealing mechanism includes: The brake hub (28) is sealed to the wheel hub (33) on one side. A sealing ring (30) is provided on the frame (26) and is rotatably and sealingly connected to the brake hub (28); Brake (27) is connected to the frame (26) and the brake hub (28) respectively to brake the hub (33); A bearing seat (38) is provided in the frame (26) at the middle part of the half shaft (6). The bearing seat (38) is rotatably connected to the half shaft (6) through the half shaft positioning bearing (32). The secondary planetary carrier (19) has a flange-shaped structure. One end of the frame (26) inserted into the hub (33) has a tubular structure and a slot. One end of the secondary planetary carrier (19) is inserted and fixed in the slot and connected and fixed to the frame (26). The hub positioning bearing (23) includes two sets of tapered roller bearings arranged opposite each other. One set of tapered roller bearings is limited by a sealing ring (30), and the slot opening of the frame (26) is provided with an adjusting piece (34) to limit the other set of tapered roller bearings.

10. The wheel-side drive system as described in claim 9, characterized in that: The brake hub (28) is connected to the wheel hub (33) by fasteners, and a hub seal ring (31) is provided on the contact surface for sealing; the brake hub (28) and the sealing seat ring (30) are connected by an inner floating oil seal (25) for rotational sealing; the brake hub (28) and the brake (27) are connected by an outer floating oil seal (24) for rotational sealing.

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