Maintenance method for electric wheels of mining truck

Abstract

According to the maintenance method for the electric wheel of the mining truck, the electric wheel can be overturned, rotated and lifted through the overturning table, and therefore the labor intensity of operators and the risk of high-altitude operation are reduced. By using the overall automatic disassembly and assembly robot, the large-torque bolt can be quickly disassembled or tightened, and the time and the labor intensity of manual operation are reduced. An operator can work on the electric moving platform, the operator can quickly reach different working points through the horizontal moving and lifting functions of the electric moving platform, and the working efficiency is improved. And the assistance arm provides assistance for manual operation, so that the consumption of an operator during disassembly and tightening of a large-torque bolt is reduced, and the injury risk is reduced. And the positioning tool can be used for accurately clamping and positioning the parts, the assembling accuracy is ensured, the walking mechanism can drive the positioning tool to move linearly, the labor intensity of workers is reduced, and the working efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric wheel maintenance for mining trucks, and in particular to a method for maintenance of electric wheels for mining trucks. Background Art

[0002] As the most widely used and important means of transportation in open-pit mines, electric wheels for mining trucks need to operate for a long time and at high intensity in harsh environments, and internal parts often wear out or even get damaged. Therefore, maintenance personnel need to regularly inspect and repair electric wheels for mining trucks to ensure that they do not affect work efficiency.

[0003] At present, all maintenance work is done manually, but the electric wheel is large in size, the overall structure is complex, manual disassembly and assembly are difficult, and the work efficiency is low. Therefore, an intelligent and automated electric wheel maintenance method is needed to solve the above problems. Summary of the invention

[0004] The invention provides a method for repairing electric wheels of a mining truck, so as to solve the problem of low repair efficiency in the prior art.

[0005] In order to solve the above problems, the present invention provides a method for repairing electric wheels of mining trucks, comprising an overall disassembly step, a component disassembly step, a component assembly step and an overall assembly step, wherein the overall disassembly step comprises the overall disassembly of multiple components in the electric wheel, and the overall assembly step comprises the overall assembly of multiple components in the electric wheel; the equipment used in the overall disassembly step and the overall assembly step comprises a turning table, an overall automatic disassembly and assembly robot, an electric mobile platform, a disassembly assisting arm, and a tightening assisting arm, the turning table is used for turning, rotating and lifting the electric wheel, the overall automatic disassembly and assembly robot is used for disassembling or tightening the high-torque bolts of the electric wheel located on the turning table, the electric mobile platform serves as an operator's working platform, and the electric mobile platform can move horizontally and lifting, the disassembly assist arm and the tightening assist arm are both located on the electric mobile platform, the disassembly assist arm is used for manually assisting the disassembly of the high-torque bolts of the electric wheel, and the tightening assist arm is used for manually assisting the tightening of the high-torque bolts of the electric wheel; the component disassembly step includes the disassembly of parts from multiple components in the electric wheel, and the component assembly step includes the assembling of parts from multiple components in the electric wheel; the equipment used in the component disassembly step and the component assembly step include a positioning tool, a running mechanism and an automatic component disassembly and assembly robot, the positioning tool is used to clamp and position parts, the positioning tool is installed on the running mechanism, the running mechanism is used to drive the positioning tool to move in a straight line, and the automatic component disassembly and assembly robot is used to disassemble or tighten the high-torque bolts of the components located on the positioning tool.

[0006] Furthermore, the equipment used in the electric wheel maintenance method for mining trucks also includes an electric control cabinet, a robot control cabinet, a hydraulic pump station, a tool platform, a bolt placement box and a safety fence.

[0007] Furthermore, the overall disassembly steps include: disassembling the motor: placing the electric wheel horizontally, removing the 12 hexagonal bolts connecting the motor and the frame, and separating the motor from the frame; draining the gearbox lubricating oil: removing the drain bolt on the secondary planetary carrier to drain the gearbox lubricating oil; draining the brake oil: turning the electric wheel over, opening the oil valve to drain the brake oil, and removing the 8 twelve-pointed bolts; disassembling the secondary sun gear end cover: removing the 11 hexagonal bolts on the end cover, and separating the end cover from the low-speed planetary carrier; disassembling the secondary planetary carrier assembly and the secondary sun gear: first remove the 8 square-headed magnetic plugs on the end face of the secondary planetary carrier, and then remove the 35 twelve-pointed bolts on the secondary planetary carrier to separate the secondary planetary carrier from the torque tube; disassembling the first-level planetary carrier assembly and the first-level sun gear: separate the first-level planetary carrier assembly from the first-level sun gear.

[0008] Furthermore, the overall disassembly steps also include: disassembling the torque tube, the ring gear, and the sprocket: disassembling the 18 hexagon socket head bolts, 9 sets of hexagon nuts and studs between the torque tube and the wheel hub, separating the torque tube from the wheel hub, and then disassembling the 8 sets of hexagon head bolts connecting the ring gear and the sprocket, separating the ring gear from the baffle, and continuing to disassemble the 16 twelve-pointed head bolts between the sprocket and the frame, and separating the sprocket from the frame; disassembling the wheel hub and the bearing: disassembling the 27 twelve-pointed head bolts between the wheel hub and the wheel hub connecting frame, separating the wheel hub from the wheel hub connecting frame, continuing to disassemble the upper shaft inner ring of the lower wheel hub, and then disassembling the bearing outer ring, and finally disassembling the bearing inner ring on the frame; disassembling the floating seal seat: disassembling the floating oil seal between the floating seal seat and the wheel hub connecting frame; disassembling the brake: disassembling the 27 twelve-pointed head bolts connecting the frame and the piston end cover, and separating the brake from the frame.

[0009] Furthermore, the component disassembly steps include: wheel hub connecting frame disassembly: disassembly of the 12 hexagonal bolts of the wheel hub connecting frame and the seal bracket, and then disassembly of the 32 twelve-pointed bolts of the wheel hub gear ring and the wheel hub connecting frame, and separation of the wheel hub gear ring, the seal bracket and the wheel hub connecting frame; wet brake disassembly: disassembly of the 6 sets of brackets on the brake inner gear ring, a total of 12 external hexagonal bolts, and then disassembly of the 48 twelve-pointed bolts of the brake upper end cover and the inner gear ring, separation of the upper end cover, and then disassembly of the 54 twelve-pointed bolts of the brake piston end cover and the inner gear ring, and then disassembly Remove the 12 hexagonal bolts on the end face of the brake piston, separate the inner gear ring, piston and piston end cover, and finally remove the plug on the piston end cover and the brake oil drain tool; Disassemble the secondary planetary carrier assembly: remove the 8 twelve-pointed head bolts on the secondary planetary carrier, pull out the 4 secondary planetary pins, separate the secondary planetary gear from the secondary planetary carrier, repeat the separation of the remaining three secondary planetary gears, continue to remove the 6 twelve-pointed head bolts on the primary planetary carrier, pull out the 3 primary planetary pins, separate the 3 primary planetary gears on the primary planetary carrier, and remove the bearings on the primary planetary gears.

[0010] Furthermore, the component assembly steps include: hub pre-assembly: with the motor side facing upward, heat the hub bearing outer ring installation position to 60°C, take the outer ring of a tapered roller bearing, install the large end of the bearing outer ring to the hub bearing stop, and tap with a nylon hammer to ensure that the gap between the bearing end face and the stop shoulder is no more than 0.03mm, turn the gear box side upward, and repeat this step; ring and gear disc pre-assembly: align the gear disc with the center of the ring gear, drop it smoothly, take 2 hexagonal bolts and 1 anti-loosening washer, install the baffle on the ring gear, and repeat this step to install another 7 baffles; first-stage planetary wheel assembly: heat the first-stage planetary wheel to 110°C, place a spherical roller bearing on the bearing pad, align the planetary wheel with the center of the bearing, and install Another spherical roller bearing is in the inner hole of the upper end of the planetary gear. Use a nylon hammer to knock on the gear and the end face of the outer ring of the bearing to ensure that the end face of the outer ring of the bearing fits with the shoulder. Repeat this step to assemble the other two first-level planetary gears; first-level planetary carrier assembly: apply blue oil to the two groups of four consecutive tooth surfaces on the three first-level planetary gears, assemble the two first-level planetary gears into the first-level planetary carrier, and align the inner holes and pin holes of the planetary gear bearings, install the limit ring assembly in the step hole on the lower side of the first-level planetary carrier spline, assemble the third first-level planetary gear in the first-level planetary carrier, align the inner holes and pin holes of the planetary gear bearings; freeze the planetary pin and install it in the pin hole of the planetary carrier, use a nylon hammer to knock on the end face, so that the planetary pin shoulder fits with the end face of the inner ring of the bearing, and then proceed After rust prevention treatment, take 6 twelve-point head bolts and lubricate, prevent loosening, and lock glue treatment, and install them in 3 planetary pins respectively; Secondary planetary gear assembly: place a spherical roller bearing in the center of the bearing pad, heat the secondary planetary gear to 110℃, align the planetary gear with the center of the bearing and drop it, install another spherical roller bearing in the inner hole of the planetary gear, and use a nylon hammer to knock the gear and the end face of the outer ring of the bearing to ensure that the end face of the outer ring of the bearing fits the shoulder, and repeat this step to install the other 2 secondary planetary gears; Secondary planetary carrier assembly: freeze 4 secondary planetary pins, apply blue oil on 2 groups of 4 continuous tooth surfaces on these secondary planetary gears, and assemble 4 secondary planetary gears in the secondary planetary carrier in turn, align the inner hole of the planetary gear bearing and the row Planetary carrier pin hole, install the frozen planetary pin in the pin hole, knock the planetary pin end face with a nylon hammer to make the planetary pin shoulder fit with the end face of the inner ring of the bearing, and carry out rust-proof treatment. Then take 8 twelve-point head bolts, lubricate, prevent loosening and lock glue treatment, and install them in 4 planetary pins respectively. Take 8 square-head magnetic screw plugs and install them at the ends of the secondary planetary carrier in turn, and then install the end cover locating pin on the secondary planetary carrier; Assembly of secondary planetary carrier and torque tube: heat the torque tube to 80℃, freeze the locating pin, apply sealant on the torque tube joint surface, install the locating pin in the torque tube pin hole, align the secondary planetary carrier with the center and pin hole of the torque tube, take 35 twelve-point head bolts, and fix the secondary planetary carrier assembly on the torque tube.

[0011] Furthermore, the component assembly steps also include: wet brake assembly: install 3 external hexagonal O-ring plugs on the plane of the piston end cover, then take 1 external hexagonal O-ring plug and install it on the lower plane of the piston end cover, take 8 hexagonal head bolts and 8 flat washers to install 2 oil baffles and O-rings on the motor side end face of the piston end cover, install the large circular groove and the small circular groove of the grid ring in the groove, and apply brake oil, align the piston installation return mechanism with the countersunk hole to the piston end cover, take 12 hexagonal head bolts, spring sleeves, and return springs for assembly, and fix the piston on the piston end cover, apply locking glue to the threads, take 1 sealing ring and install it in the groove on the end face of the gear ring, align the inner gear ring with the mounting hole of the piston end cover, apply sealant to the joint surface, take 54 twelve-pointed head bolts and flat washers to fix the piston end cover and the inner gear ring, align the wheel hub with the center of the inner hole of the piston, install the damping plate, Friction plate and isolation plate, take 1 sealing ring and install it to the groove on the end face of the gear ring, install the skeleton oil seal on the inner hole of the upper end cover, align the upper end cover with the stop and mounting hole of the inner gear ring, take 48 twelve-point bolts and flat washers, fix the brake upper end cover and the inner gear ring, measure the depth H1 of the two end faces of the upper end cover and the depth H2 of the two end faces of the seal bracket, take 6 hexagonal heads and flat washers to install the bracket to the side end face position of the gear box of the upper end cover, and install half of the floating sealing ring on the hub connecting frame; Assembly of the hub connecting frame: install the sealing ring to the hub connecting frame, install the floating sealing ring in the installation position of the upper end cover, take 12 bolts, hexagonal bolts, and anti-loosening washers, install the sealing bracket to the hub connecting frame, add adjustment gaskets, align the brake hub gear ring with the hub connecting frame, take 32 twelve-point bolts and thickened flat washers and install them on the hub gear ring and the hub connecting frame in sequence.

[0012] Furthermore, the overall assembly steps include: assembling the brake: installing a hollow O-ring in the hollow cylindrical joint groove of the frame, and aligning it with the center of the gearbox motor interface hole, taking 12 hexagonal bolts and flat washers, fixing the test fixture on the frame, locking the brake with locking bolts, installing a sealing ring in the root groove of the frame mounting surface, applying sealant on the joint surface of the frame and the brake, aligning the brake with the center of the frame and the mounting hole, taking 27 twelve-point bolts and flat washers, installing the brake on the frame, and using Calculate the internal clearance using the cross-measurement method to ensure that it is no greater than 1mm. Install the O-ring in the ring groove of the floating seal seat, install the elastic cylindrical pin in the pin hole of the floating seal seat, align the pin hole of the floating seal seat with the cylindrical pin groove of the frame, and ensure that it fits the shoulder; Install the inner ring of the bearing: find the corresponding tapered roller bearing, heat the inner ring of the bearing to 110℃, and install the large end face of the inner ring of the bearing facing up at the bearing stop position at the end of the frame; cross-measure the distance between the inner ring of the bearing and the end face of the frame, and knock the end face of the inner ring of the bearing with a copper rod to ensure that the deviation is not More than 0.03mm; Assemble the wheel hub: find the corresponding tapered roller bearing inner ring, heat the bearing inner ring to 110℃, install the bearing inner ring with the large end face downward on the frame, hit the bearing inner ring end face with a nylon hammer to ensure that the clearance between the bearing end face and the shoulder is no more than 0.03mm, install a sealing ring in the groove at the root of the hub connecting frame, apply sealant on the joint surface between the hub connecting frame and the hub, align the straight tooth bolt side of the hub downward with the center of the frame and the mounting hole, take 27 twelve-point head bolts and flat washers, and install the hub connecting frame. The connecting frame is fixed on the wheel hub, and the external clearance between the wheel hub connecting frame and the upper end cover is measured; Clearance adjustment: Use a dial indicator and a depth gauge to measure the dimensions that affect the clearance, and select a suitable clearance adjustment gasket, ensuring that its thickness is within ±0.07mm, and install the clearance adjustment gasket on the end face of the inner ring of the bearing; Assembly of the gear plate assembly and frame: Install the gear plate locating pin, freeze 16 hollow pins, align the gear ring assembly with the locating pin hole, install the hollow pins in the pin holes in sequence, and take 16 twelve-point head bolts to fix the gear ring assembly to the frame.

[0013] Furthermore, the overall assembly steps also include: installing the first-stage sun gear and the first-stage planetary carrier assembly: freezing the limit pin, installing the rear small end downward in the center hole of the first-stage sun gear end, aligning the first-stage sun gear gear upward to the center of the frame, installing the first-stage friction plate on the limit pin, aligning the first-stage planetary carrier assembly with the center of the gear ring to ensure meshing; installing the second-stage planetary carrier assembly: leveling the torque tube with a spirit level, arranging the press-fit studs, heating the small end of the torque tube to 40°C, freezing the positioning pin, applying sealant to the joint surface between the second-stage planetary carrier and the torque tube, and fixing the positioning pin. Install it in the torque tube pin hole, align the secondary planetary carrier with the center of the torque tube and the pin hole, take 4-6 nuts and install them to the end of the press-fit stud; assemble the torque tube and secondary planetary carrier assembly to the wheel hub: apply sealant on the joint surface of the wheel hub and the torque tube, align the torque tube and the secondary planetary carrier with the center and hole position of the wheel hub, take 18 hexagon socket round head bolts, and fix the torque tube on the wheel hub; Install the secondary sun gear: align the secondary sun gear with the center and spline of the secondary planetary carrier during installation, turn the gearbox over, and use a dial indicator and cross measurement method to select a suitable adjustment pad.

[0014] Furthermore, the overall assembly steps also include: installation of studs on the gearbox side of the electric wheel: take 54 studs into the threaded holes of the wheel hub on the side of the electric gearbox, install 9 stud sleeves, nuts, and flat washers, and install the nameplate to the milled end face of the arc groove on the large end of the electric wheel frame; motor assembly: install the O-ring in the ring groove, apply sealant on the frame and the motor installation end face, align the motor with the gearbox motor interface and engage the spline, take 12 hexagonal bolts and flat washers, and fix the motor on the frame; adjust the clearance: use a dial indicator and cross measurement method to select a suitable adjustment pad; assembly of the sun gear end cover and the secondary planetary carrier end face: install the end cover locating pin on the secondary planetary carrier, install the secondary friction plate on the end of the secondary sun gear, put on the O-ring, take 11 hexagonal bolts and flat washers, and fix the end cover on the end face of the secondary planetary carrier.

[0015] By applying the technical solution of the present invention, the electric wheel can be turned over, rotated and lifted by the turning table, so that the electric wheel can be repaired in a safe state, reducing the risk of operators working at high altitudes. By using the overall automatic disassembly and assembly robot, high-torque bolts can be quickly disassembled or tightened, reducing the time and labor intensity of manual operation. The operator can work on the electric mobile platform, and the horizontal movement and lifting functions of the electric mobile platform enable the operator to quickly reach different work points, improving the work efficiency. The disassembly assist arm and the tightening assist arm provide assistance for manual operation, reducing the consumption of the operator when disassembling and tightening high-torque bolts, and reducing the risk of injury. The setting of the positioning tool can be used to accurately clamp and position the parts, ensuring the accuracy of the assembly of the parts. The running mechanism can drive the positioning tool to move in a straight line, without the need for manpower to carry, reducing the labor intensity of the manual work and improving the work efficiency. By using the method in this solution, the maintenance cycle of the electric wheel of the large mining truck is significantly shortened, and the efficiency and accuracy of the maintenance are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 The following is a flowchart of a method for repairing electric wheels of a mining truck provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] like Figure 1As shown, an embodiment of the present invention provides a method for repairing an electric wheel of a mining truck, comprising an overall disassembly step, a component disassembly step, a component assembly step and an overall assembly step, wherein the overall disassembly step comprises the overall disassembly of multiple components in the electric wheel, and the overall assembly step comprises the overall assembly of multiple components in the electric wheel; the equipment used in the overall disassembly step and the overall assembly step comprises a turning table, an overall automatic disassembly and assembly robot, an electric mobile platform, a disassembly assisting arm, and a tightening assisting arm, the turning table is used for turning, rotating and lifting the electric wheel, the overall automatic disassembly and assembly robot is used for disassembling or tightening the high-torque bolts of the electric wheel located on the turning table, and the electric mobile platform serves as an operating platform for operators, and the electric mobile platform can move horizontally and The lifting, disassembly assist arm and the tightening assist arm are all located on the electric mobile platform. The disassembly assist arm is used for manually assisting the disassembly of the high-torque bolts of the electric wheel, and the tightening assist arm is used for manually assisting the tightening of the high-torque bolts of the electric wheel; the component disassembly step includes the disassembly of parts from multiple components in the electric wheel, and the component assembly step includes the assembly of parts from multiple components in the electric wheel; the equipment used in the component disassembly step and the component assembly step include positioning tooling, running mechanism and automatic component disassembly and assembly robot, the positioning tooling is used to clamp and position parts, the positioning tooling is installed on the running mechanism, the running mechanism is used to drive the positioning tooling to move in a straight line, and the automatic component disassembly and assembly robot is used to disassemble or tighten the high-torque bolts of components located on the positioning tooling.

[0020] In this embodiment, the electric wheel can be turned over, rotated and lifted by the turning table, so that the electric wheel can be repaired in a safe state, reducing the risk of operators working at high altitudes. By using the overall automatic disassembly and assembly robot, high-torque bolts can be quickly disassembled or tightened, reducing the time and labor intensity of manual operation. The operator can work on the electric mobile platform, and the horizontal movement and lifting function of the electric mobile platform enable the operator to quickly reach different work points, improving the work efficiency. The disassembly booster arm and the tightening booster arm provide assistance for manual operation, reducing the consumption of the operator when disassembling and tightening the high-torque bolts, and reducing the risk of injury. The setting of the positioning tool can be used to accurately clamp and position the parts, ensuring the accuracy of the assembly of the parts. The running mechanism can drive the positioning tool to move in a straight line, without the need for manpower to carry, reducing the labor intensity of the manual work, improving the work efficiency, and can also isolate the manual operation space of the operator and the automatic operation space of the robot, maximizing the personal safety of the operator. By using the method in this scheme, the maintenance cycle of the electric wheel of the large mining truck is significantly shortened, and the efficiency and accuracy of the maintenance are improved.

[0021] Specifically, the maintenance method of the electric wheel of a mining truck in this scheme is as follows: the electric wheel to be repaired is placed on a turning table, the bolts on the electric wheel are removed by an overall automatic disassembly and assembly robot and a component automatic disassembly and assembly robot, and then the electric wheel assembly is disassembled, and the disassembled components are cleaned. After cleaning, the components are disassembled by an overall automatic disassembly and assembly robot and a component automatic disassembly and assembly robot. If there are parts with severe wear or damage, they are repaired. When all parts have been repaired, they are assembled into individual components, and finally the components are placed on a turning table, the bolts are installed back into the individual components and tightened, and finally the complete electric wheel is installed. After the installation is completed, a load test is performed, and after the test is normal, the electric wheel is loaded back onto the mining truck.

[0022] Furthermore, the equipment used in the electric wheel maintenance method for mining trucks also includes an electric control cabinet, a robot control cabinet, a hydraulic pump station, a tool platform, a bolt placement box and a safety fence.

[0023] In this embodiment, the electric control cabinet can provide a stable power supply and control signal to ensure the power supply and operation control during the maintenance of the electric wheel. Through the electric control cabinet, the operator can remotely control the start, stop and other functions of the electric wheel to improve the automation of the maintenance process. The robot control cabinet can control the overall automatic disassembly and assembly robot and the component automatic disassembly and assembly robot, so that the overall automatic disassembly and assembly robot and the component automatic disassembly and assembly robot can realize multi-angle and multi-directional automatic bolt disassembly and assembly operations, reduce manual participation, and improve efficiency and safety. The hydraulic pump station is installed on the hydraulic system bracket, and the hydraulic system bracket is fixedly set to provide good support and stability for the hydraulic pump station. The hydraulic pump station can provide power to the hydraulic wrench at the end of the overall automatic disassembly and assembly robot and the component automatic disassembly and assembly robot, and can provide stable pressure and flow to ensure that the hydraulic wrench can work efficiently. The tool platform provides a safe and orderly tool storage and management platform to ensure that all maintenance tools are in an easy-to-reach position, which is convenient for operators to quickly use and reduces the risk of tool loss or damage. The bolt placement box is used to place the bolts that are automatically removed and taken out by the robot, ensuring that the bolts will not be lost or mixed up during the maintenance process. The bolt placement box helps to keep the work area clean, prevent the loss of bolts, and ensure that each bolt can be properly returned to its original position. The safety fence can enclose the work area, isolate these potential danger areas, and protect the safety of surrounding personnel. It can also effectively prevent operators and unrelated personnel or objects from accidentally entering the robot's work area, reduce interference with equipment operation and potential accidents, and reduce the risk of injury. The electrical control cabinet and the robot control cabinet are placed outside the safety fence.

[0024] Among them, the overall disassembly steps include: disassembling the motor: placing the electric wheel horizontally, removing the 12 hexagonal bolts connecting the motor and the frame, and separating the motor from the frame; draining the gearbox lubricating oil: removing the drain bolt on the secondary planetary carrier to drain the gearbox lubricating oil; draining the brake oil: turning the electric wheel over, opening the oil valve to drain the brake oil, and removing the 8 twelve-pointed bolts; disassembling the secondary sun gear end cover: removing the 11 hexagonal bolts on the end cover, and separating the end cover from the low-speed planetary carrier; disassembling the secondary planetary carrier assembly and the secondary sun gear: first remove the 8 square-headed magnetic plugs on the end face of the secondary planetary carrier, and then remove the 35 twelve-pointed bolts on the secondary planetary carrier to separate the secondary planetary carrier from the torque tube; disassembling the first-level planetary carrier assembly and the first-level sun gear: separate the first-level planetary carrier assembly from the first-level sun gear.

[0025] In this embodiment, the overall disassembly steps are as follows:

[0026] Step 1: Remove the motor, place the electric wheel horizontally, use the overall automatic disassembly and assembly robot to remove the 12 hexagonal bolts connecting the motor and the frame, and slowly separate the motor from the frame. In this step, placing the electric wheel horizontally can prevent accidental injury and damage, and removing the bolts between the motor and the frame can safely remove the motor from the frame for subsequent inspection or replacement.

[0027] Step 2: Drain the gearbox lubricant. Use the overall automatic disassembly and assembly robot to remove the drain bolt on the secondary planetary carrier and drain the lubricant in the gearbox. In this step, draining the lubricant in the gearbox can ensure that the lubricant in the gearbox is replaced in time, remove possible contaminants and wear metals, and avoid further damage to gears and bearings.

[0028] Step 3: Drain the brake oil, turn the electric wheel over using a turning table, open the oil valve to drain the brake oil, and then use the overall automatic disassembly and assembly robot to remove the 8 12-point head bolts on the electric wheel. In this step, draining the brake oil can prevent the brake oil from losing its braking effect due to long-term use, and can also remove the old oil and possible air in the system to ensure that the brake system can work normally after refilling with new oil.

[0029] Step 4: Remove the secondary sun gear cover, use the overall automatic disassembly and assembly robot to remove the 11 hexagonal bolts on the secondary sun gear cover, and separate the secondary sun gear cover from the low-speed planet carrier. In this step, the secondary sun gear cover can be separated to check the wear of the secondary sun gear cover and the planetary gear, and to make necessary replacements or repairs.

[0030] Step 5: Disassemble the secondary planet carrier assembly and the secondary sun gear. First, use the overall automatic disassembly and assembly robot to remove the 8 square head magnetic screw plugs on the end face of the secondary planet carrier, and then remove the 35 12-point head bolts on the secondary planet carrier to separate the secondary planet carrier from the torque tube. In this step, disassembling the secondary planet carrier and the secondary sun gear can check the wear of the gears and replace the damaged parts to ensure the efficiency and life of the transmission system.

[0031] Step 6: Disassemble the primary planet carrier assembly and the primary sun gear, and use the overall automatic disassembly and assembly robot to directly separate the primary planet carrier and the primary sun gear. In this step, separating the primary planet carrier and the primary sun gear can check the wear of the primary planet gear and ensure the stability and efficiency of the transmission system.

[0032] In this embodiment, the standardized disassembly steps ensure accurate separation of each component, reduce damage to parts caused by improper disassembly, and are suitable for regular maintenance and troubleshooting of electric wheels, improving the quality and efficiency of maintenance. Moreover, the standardized process reduces the reliance on operator skills, making maintenance work easier to operate and manage.

[0033] Furthermore, the overall disassembly steps also include: disassembling the torque tube, the ring gear, and the sprocket: disassembling the 18 hexagon socket head bolts, 9 sets of hexagon nuts and studs between the torque tube and the wheel hub, separating the torque tube from the wheel hub, and then disassembling the 8 sets of hexagon head bolts connecting the ring gear and the sprocket, separating the ring gear from the baffle, and continuing to disassemble the 16 twelve-pointed head bolts between the sprocket and the frame, and separating the sprocket from the frame; disassembling the wheel hub and the bearing: disassembling the 27 twelve-pointed head bolts between the wheel hub and the wheel hub connecting frame, separating the wheel hub from the wheel hub connecting frame, continuing to disassemble the upper shaft inner ring of the lower wheel hub, and then disassembling the bearing outer ring, and finally disassembling the bearing inner ring on the frame; disassembling the floating seal seat: disassembling the floating oil seal between the floating seal seat and the wheel hub connecting frame; disassembling the brake: disassembling the 27 twelve-pointed head bolts connecting the frame and the piston end cover, and separating the brake from the frame.

[0034] In this embodiment, the overall disassembly step further includes:

[0035] Step 7: Disassemble the torque tube, gear ring, and gear plate. Use the overall automatic disassembly and assembly robot to remove the 18 hexagon socket head bolts, 9 sets of hexagon nuts and studs between the torque tube and the wheel hub, and separate the torque tube from the wheel hub. Then use the overall automatic disassembly and assembly robot to remove the 8 sets of hexagon head bolts connecting the gear ring and the gear plate, separate the gear ring from the baffle, and continue to use the overall automatic disassembly and assembly robot to remove the 16 twelve-pointed head bolts between the gear plate and the frame, and separate the gear plate from the frame. In this step, by disassembling these parts that are often subjected to high loads and wear, the degree of wear can be checked, and necessary repairs or replacements can be made to ensure the stability and efficiency of the transmission system.

[0036] Step 8: Remove the wheel hub and bearings. Use the overall automatic disassembly and assembly robot to remove the 27 twelve-point bolts of the wheel hub and the wheel hub connecting frame, separate the wheel hub from the wheel hub connecting frame, continue to remove the upper shaft inner ring of the lower wheel hub, then remove the bearing outer ring, and finally remove the bearing inner ring on the frame. In this step, the wheel hub and bearing are key components for supporting and rotating the wheel. By removing these components, the wheel hub and bearing can be inspected and maintained in depth, which can reduce the failure rate, extend the service life, and improve the operating efficiency.

[0037] Step 9: Remove the floating seal seat and use the overall automatic disassembly and assembly robot to remove the floating oil seal between the floating seal seat and the hub connecting frame. In this step, the maintenance of the floating seal seat helps to keep the bearing clean and lubricated, prevent grease leakage and contaminants from entering, reduce wear, and increase the service life of the bearing.

[0038] Step 10: Disassemble the brake and use the overall automatic disassembly and assembly robot to remove the 27 twelve-point head bolts connecting the frame and the piston end cover to separate the brake from the frame. In this step, the brake can be fully inspected and maintained. Brake maintenance can ensure that it can effectively slow down or stop when needed, reduce accident risks, and improve operational safety.

[0039] In this embodiment, the overall disassembly process ensures that each component is intact, lays a solid foundation for subsequent maintenance and assembly, is suitable for in-depth maintenance and component replacement of the electric wheel, and ensures the long-term reliable operation of the electric wheel.

[0040] like Figure 1 As shown in the figure, the steps of component disassembly include: wheel hub connecting frame disassembly: disassemble the 12 hexagonal bolts of the wheel hub connecting frame and the seal bracket, then disassemble the 32 twelve-pointed bolts of the wheel hub gear ring and the wheel hub connecting frame, and separate the wheel hub gear ring, the seal bracket and the wheel hub connecting frame; wet brake disassembly: disassemble the 6 sets of brackets on the brake inner gear ring, a total of 12 external hexagonal bolts, then disassemble the 48 twelve-pointed bolts of the brake upper end cover and the inner gear ring, separate the upper end cover, and then disassemble the 54 twelve-pointed bolts of the brake piston end cover and the inner gear ring, and then disassemble the system Remove the 12 external hexagonal bolts on the end face of the brake piston, separate the inner gear ring, piston and piston end cover, and finally remove the screw plug on the piston end cover and the brake oil drain tool; Disassemble the secondary planetary carrier assembly: remove the 8 twelve-pointed head bolts on the secondary planetary carrier, pull out the 4 secondary planetary pins, separate the secondary planetary gear and the secondary planetary carrier, repeat the separation of the remaining three secondary planetary gears, continue to remove the 6 twelve-pointed head bolts on the primary planetary carrier, pull out the 3 primary planetary pins, separate the 3 primary planetary gears on the primary planetary carrier, and remove the bearings on the primary planetary gear.

[0041] In this embodiment, the steps of component disassembly are as follows:

[0042] Step 1: Disassemble the hub frame, use the automatic disassembly robot to remove the 12 hexagonal bolts of the hub frame and the seal bracket, and then remove the 32 twelve-pointed bolts of the wheel ring gear and the hub frame, and separate the wheel ring gear, the seal bracket and the hub frame. In this step, the wheel ring gear, the seal bracket and the hub frame are separated, and the wear and damage of these parts can be checked, and the damaged parts can be replaced in time to ensure the stable operation and sealing performance of the wheel.

[0043] Step 2: Wet brake disassembly, use the automatic component disassembly robot to remove the 6 sets of brackets on the inner gear ring of the brake, a total of 12 external hexagonal bolts, then remove the 48 twelve-pointed bolts between the upper end cover and the inner gear ring of the brake, separate the upper end cover, and then remove the 54 twelve-pointed bolts between the brake piston end cover and the inner gear ring, and then remove the 12 external hexagonal bolts on the end face of the brake piston, separate the inner gear ring, piston and piston end cover, and finally remove the screw plug on the piston end cover and the brake oil drain tool. In this step, the various components of the brake are disassembled to check the wear and damage of the brake to ensure the effectiveness and safety of the brake system. The use of the oil drain tool helps to discharge the old oil in the brake and reduce the impact of air and other pollutants.

[0044] Step 3: Disassemble the secondary planetary frame assembly. Use the automatic disassembly robot to remove the 8 twelve-point bolts on the primary planetary frame, pull out the 4 secondary planetary pins, separate the secondary planetary wheel from the secondary planetary frame, repeat the separation of the remaining three secondary planetary wheels, continue to disassemble the 6 twelve-point bolts on the primary planetary frame, pull out the 3 primary planetary pins, separate the 3 primary planetary wheels on the primary planetary frame, and remove the bearings on the primary planetary wheels. In this step, the planetary frame and planetary wheels are disassembled to check the wear of these components, and necessary repairs or replacements can be made to ensure the stability and efficiency of the transmission system.

[0045] In this embodiment, the component disassembly process can help maintenance personnel accurately locate faulty components, avoid improper disassembly of other components, improve the targetedness and efficiency of maintenance, reduce additional parts loss and labor costs, and is suitable for accurate fault diagnosis and component-level maintenance of electric wheels.

[0046] Furthermore, the component assembly steps include: hub pre-assembly: with the motor side facing upward, heat the hub bearing outer ring installation position to 60°C, take the outer ring of a tapered roller bearing, install the large end of the bearing outer ring to the hub bearing stop, and tap with a nylon hammer to ensure that the gap between the bearing end face and the stop shoulder is no more than 0.03mm, turn the gear box side upward, and repeat this step; ring and gear disc pre-assembly: align the gear disc with the center of the ring gear, drop it smoothly, take 2 hexagonal bolts and 1 anti-loosening washer, install the baffle on the ring gear, and repeat this step to install another 7 baffles; first-stage planetary wheel assembly: heat the first-stage planetary wheel to 110°C, place a spherical roller bearing on the bearing pad, align the planetary wheel with the center of the bearing, and install Another spherical roller bearing is in the inner hole of the upper end of the planetary gear. Use a nylon hammer to knock on the gear and the end face of the outer ring of the bearing to ensure that the end face of the outer ring of the bearing fits with the shoulder. Repeat this step to assemble the other two first-level planetary gears; first-level planetary carrier assembly: apply blue oil to the two groups of four consecutive tooth surfaces on the three first-level planetary gears, assemble the two first-level planetary gears into the first-level planetary carrier, and align the inner holes and pin holes of the planetary gear bearings, install the limit ring assembly in the step hole on the lower side of the first-level planetary carrier spline, assemble the third first-level planetary gear in the first-level planetary carrier, align the inner holes and pin holes of the planetary gear bearings; freeze the planetary pin and install it in the pin hole of the planetary carrier, use a nylon hammer to knock on the end face, so that the planetary pin shoulder fits with the end face of the inner ring of the bearing, and then proceed After rust prevention treatment, take 6 twelve-point head bolts and lubricate, prevent loosening, and lock glue treatment, and install them in 3 planetary pins respectively; Secondary planetary gear assembly: place a spherical roller bearing in the center of the bearing pad, heat the secondary planetary gear to 110℃, align the planetary gear with the center of the bearing and drop it, install another spherical roller bearing in the inner hole of the planetary gear, and use a nylon hammer to knock the gear and the end face of the outer ring of the bearing to ensure that the end face of the outer ring of the bearing fits the shoulder, and repeat this step to install the other 2 secondary planetary gears; Secondary planetary carrier assembly: freeze 4 secondary planetary pins, apply blue oil on 2 groups of 4 continuous tooth surfaces on these secondary planetary gears, and assemble 4 secondary planetary gears in the secondary planetary carrier in turn, align the inner hole of the planetary gear bearing and the row Planetary carrier pin hole, install the frozen planetary pin in the pin hole, knock the planetary pin end face with a nylon hammer to make the planetary pin shoulder fit with the end face of the inner ring of the bearing, and carry out rust-proof treatment. Then take 8 twelve-point head bolts, lubricate, prevent loosening and lock glue treatment, and install them in 4 planetary pins respectively. Take 8 square-head magnetic screw plugs and install them at the ends of the secondary planetary carrier in turn, and then install the end cover locating pin on the secondary planetary carrier; Assembly of secondary planetary carrier and torque tube: heat the torque tube to 80℃, freeze the locating pin, apply sealant on the torque tube joint surface, install the locating pin in the torque tube pin hole, align the secondary planetary carrier with the center and pin hole of the torque tube, take 35 twelve-point head bolts, and fix the secondary planetary carrier assembly on the torque tube.

[0047] In this embodiment, the steps of assembling components are as follows:

[0048] Step 1: Pre-assemble the wheel hub, turn the motor side up, heat the wheel hub bearing outer ring installation part to 60℃, take the outer ring of a tapered roller bearing, use the automatic component disassembly and assembly robot to install the large end of the bearing outer ring to the wheel hub bearing stop, and tap with a nylon hammer to ensure that the clearance between the bearing end face and the stop shoulder is no more than 0.03mm. Turn the gearbox side up and repeat this step. In this step, by heating the bearing outer ring installation part to the appropriate temperature and tapping to ensure the clearance between the bearing end face and the stop shoulder, the initial wear of the bearing can be reduced and its service life can be extended.

[0049] Step 2: Pre-assemble the gear ring and gear disc, align the gear disc with the center of the gear ring, drop it steadily, take 2 hexagonal bolts and 1 anti-loosening washer, use the automatic component disassembly and assembly robot to install the baffle on the gear ring, and repeat this step to install the other 7 baffles. In this step, using hexagonal bolts and anti-loosening washers to install the baffle can prevent the baffle from loosening during operation and ensure the stability of the gear transmission.

[0050] Step 3: Assemble the first-stage planetary gear. Heat the first-stage planetary gear to 110°C, place a spherical roller bearing on the bearing pad, align the planetary gear with the center of the bearing, use the automatic disassembly and assembly robot to install another spherical roller bearing in the inner hole at the upper end of the planetary gear, and use a nylon hammer to knock the gear and the end face of the outer ring of the bearing to ensure that the end face of the outer ring of the bearing fits the shoulder. Repeat this step to assemble the other two first-stage planetary gears. In this step, by heating the planetary gear and knocking to ensure that the end face of the bearing fits the shoulder, early damage to the bearing can be avoided and transmission efficiency can be improved.

[0051] Step 4: Assemble the first-level planetary carrier. Apply blue oil to the two groups of four continuous tooth surfaces on the three first-level planetary wheels. Use the automatic disassembly and assembly robot to assemble the two first-level planetary wheels into the first-level planetary carrier, and align the inner hole and pin hole of the planetary wheel bearing. Install the limit ring assembly in the step hole on the lower side of the first-level planetary carrier spline. Assemble the third first-level planetary wheel into the first-level planetary carrier, and align the inner hole and pin hole of the planetary wheel bearing. Freeze the planetary pin and install it in the pin hole of the planetary carrier. Use a nylon hammer to knock the end face so that the planetary pin shoulder fits the end face of the inner ring of the bearing. Then perform anti-rust treatment. Take 6 twelve-point head bolts, lubricate, prevent loosening, and lock the glue, and install them in the three planetary pins respectively. In this step, applying blue oil, aligning the inner hole and pin hole of the planetary wheel bearing, and installing the limit ring assembly can reduce the offset and wear of the planetary wheel and improve the reliability of the entire planetary gear system.

[0052] Step 5: Secondary planetary gear assembly, place a spherical roller bearing in the center of the bearing pad, heat the secondary planetary gear to 110°C, use the automatic component disassembly and assembly robot to align the planetary gear with the center of the bearing and drop it, install another spherical roller bearing in the inner hole of the planetary gear, tap the gear and the end face of the outer ring of the bearing with a nylon hammer to ensure that the end face of the outer ring of the bearing fits the shoulder, repeat this step once to install the other two secondary planetary gears. In this step, by heating the planetary gear and tapping to ensure that the end face of the bearing fits the shoulder, early damage to the bearing can be avoided and transmission efficiency can be improved.

[0053] Step 6: Secondary planetary carrier assembly, freeze 4 secondary planetary pins, apply blue oil on 2 groups of 4 continuous tooth surfaces on these secondary planetary wheels, assemble 4 secondary planetary wheels in the secondary planetary carrier using the automatic disassembly and assembly robot, align the inner hole of the planetary wheel bearing and the pin hole of the planetary carrier, install the frozen planetary pin in the pin hole, tap the end face of the planetary pin with a nylon hammer to make the planetary pin shoulder fit with the end face of the inner ring of the bearing, perform anti-rust treatment, then take 8 twelve-point head bolts, lubricate, prevent loosening and lock glue treatment, install them in the 4 planetary pins respectively, take 8 square head magnetic screw plugs, install them on the end of the secondary planetary carrier in turn, and then install the end cover locating pin on the secondary planetary carrier. In this step, the stability and durability of the planetary gear system can be improved by freezing the planetary pins and tapping to ensure that the planetary pin shoulder fits with the end face of the inner ring of the bearing.

[0054] Step 7: Assemble the secondary planetary carrier and torque tube, heat the torque tube to 80℃, freeze the positioning pin, apply sealant on the torque tube joint surface, use the automatic component disassembly robot to install the positioning pin in the torque tube pin hole, align the secondary planetary carrier with the center of the torque tube and the pin hole, take 35 twelve-point head bolts, and fix the secondary planetary carrier assembly on the torque tube. In this step, by heating the torque tube and freezing the positioning pin, and applying sealant on the joint surface, the tightness and sealing of the assembly can be improved to prevent lubricant leakage and contaminants from entering.

[0055] In this embodiment, through precise heating and cooling control, as well as strict requirements on clearance and fit, the assembly accuracy is ensured, and the operating stability and service life of the electric wheel are improved.

[0056] Among them, the component assembly steps also include: wet brake assembly: install 3 external hexagonal O-ring plugs on the plane of the piston end cover, and then take 1 external hexagonal O-ring plug to install it on the lower plane of the piston end cover, take 8 hexagonal head bolts and 8 flat washers to install 2 oil baffles and O-rings on the end face of the piston end cover motor side, install the large circular groove and the small circular groove of the grid ring in the groove, and apply brake oil, align the piston installation return mechanism with the countersunk hole to the piston end cover, take 12 hexagonal head bolts, spring sleeves, and return springs to assemble, and fix the piston on the piston end cover, apply locking glue to the threads, take 1 sealing ring to install it in the groove on the end face of the gear ring, align the inner gear ring with the mounting hole of the piston end cover, apply sealant to the joint surface, take 54 twelve-pointed head bolts and flat washers to fix the piston end cover and the inner gear ring, align the wheel hub with the center of the inner hole of the piston, install the damping plate, friction Wipe and spacer, take 1 sealing ring and install it to the groove on the end face of the gear ring, install the skeleton oil seal on the inner hole of the upper end cover, align the upper end cover with the stop and mounting hole of the inner gear ring, take 48 twelve-point bolts and flat washers, fix the brake upper end cover and the inner gear ring, measure the depth H1 of the two end faces of the upper end cover and the depth H2 of the two end faces of the seal bracket, take 6 hexagonal heads and flat washers to install the bracket to the side end face position of the gear box of the upper end cover, and install half of the floating sealing ring on the hub connecting frame; Assembly of the hub connecting frame: install the sealing ring to the hub connecting frame, install the floating sealing ring in the installation position of the upper end cover, take 12 bolts, hexagonal bolts, and anti-loosening washers, install the sealing bracket to the hub connecting frame, add adjustment gaskets, align the brake hub gear ring with the hub connecting frame, take 32 twelve-point bolts and thickened flat washers and install them on the hub gear ring and the hub connecting frame in sequence.

[0057] In this embodiment, the component assembly step further includes:

[0058] Step 8: Wet brake assembly, use the automatic component disassembly and assembly robot to install 3 SAE external hexagonal O-ring plugs on the plane of the piston end cover, and then take 1 SAE external hexagonal O-ring plug and install it on the lower plane of the piston end cover, take 8 hexagonal bolts and 8 flat washers to install 2 oil baffles and O-rings on the motor side of the piston end cover, install the large and small circular grooves of the grid ring in the groove, and apply brake oil, align the piston installation return mechanism with the countersunk hole on the piston end cover, take 12 hexagonal bolts, spring sleeves, and return springs, and fix the piston on the piston end cover, apply locking glue to the threads, do a piston leakage test, and take a sealing ring to install on the gear ring end face In the groove, align the inner gear ring with the mounting hole of the piston end cover, apply sealant to the joint surface, take 54 twelve-point bolts and flat washers to fix the piston end cover and the inner gear ring, align the wheel hub with the center of the piston inner hole, install the damping plate, friction plate and isolation plate, take 1 sealing ring to install it in the groove of the gear ring end face, install the skeleton oil seal in the inner hole of the upper end cover, align the upper end cover with the stopper and the mounting hole of the inner gear ring, take 48 twelve-point bolts and flat washers, fix the upper end cover of the brake and the inner gear ring, measure the depth H1 of the two end faces of the upper end cover and the depth H2 of the two end faces of the seal bracket, take 6 hexagonal heads and flat washers to install the bracket to the side end face position of the upper end cover gear box, and install half of the floating sealing ring on the wheel hub connecting frame. In this step, by installing the O-ring and the oil baffle, the internal sealing of the brake can be ensured, the internal of the brake can be effectively protected from contamination, and the pressure of the brake fluid can be maintained. The installation of the gray ring and the application of brake oil can reduce the friction loss during braking and improve the braking efficiency. The automatic component disassembly and assembly robot accurately assembles the piston and return mechanism to ensure that the brake responds quickly when needed and provides stable braking force. The automatic component disassembly and assembly robot accurately installs the seal ring and the inner gear ring to reduce the wear inside the brake and extend the service life of the brake. The automatic component disassembly and assembly robot uses twelve-pointed head bolts and washers to fix the upper end cover and the inner gear ring to ensure the stability and reliability of the brake under high load.

[0059] Step 9: Assemble the hub frame. Use the automatic component disassembly and assembly robot to install the seal ring to the hub frame, install the floating seal ring at the upper end cover installation position, take 12 hexagonal bolts and anti-loosening washers, install the seal bracket to the hub frame, add adjustment gaskets, align the brake hub gear ring with the hub frame, take 32 twelve-pointed bolts and thickened flat washers and install them on the hub gear ring and the hub frame in sequence. In this step, the seal ring and floating seal ring are accurately installed by the automatic component disassembly and assembly robot, which can protect the inside of the hub frame from environmental factors and improve its durability. In addition, by using the automatic component disassembly and assembly robot to firmly fix the brake hub gear ring and the hub frame with twelve-pointed bolts and thickened flat washers, the stability and load-bearing capacity under high load and high-speed operation can be guaranteed.

[0060] In this embodiment, a reasonable gap between the brake and the hub connecting frame is ensured through precise measurement and adjustment, the braking performance and sealing effect are improved, and the safety and efficiency of the maintenance work are guaranteed.

[0061] Furthermore, the overall assembly steps include: assembling the brake: installing a hollow O-ring in the hollow cylindrical joint groove of the frame, and aligning it with the center of the gearbox motor interface hole, taking 12 hexagonal bolts and flat washers, fixing the test fixture on the frame, locking the brake with locking bolts, installing a sealing ring in the root groove of the frame mounting surface, applying sealant on the joint surface of the frame and the brake, aligning the brake with the center of the frame and the mounting hole, taking 27 twelve-point bolts and flat washers, installing the brake on the frame, and using Calculate the internal clearance using the cross-measurement method to ensure that it is no greater than 1mm. Install the O-ring in the ring groove of the floating seal seat, install the elastic cylindrical pin in the pin hole of the floating seal seat, align the pin hole of the floating seal seat with the cylindrical pin groove of the frame, and ensure that it fits the shoulder; Install the inner ring of the bearing: find the corresponding tapered roller bearing, heat the inner ring of the bearing to 110℃, and install the large end face of the inner ring of the bearing facing up at the bearing stop position at the end of the frame; cross-measure the distance between the inner ring of the bearing and the end face of the frame, and knock the end face of the inner ring of the bearing with a copper rod to ensure that the deviation is not More than 0.03mm; Assemble the wheel hub: find the corresponding tapered roller bearing inner ring, heat the bearing inner ring to 110℃, install the bearing inner ring with the large end face downward on the frame, hit the bearing inner ring end face with a nylon hammer to ensure that the clearance between the bearing end face and the shoulder is no more than 0.03mm, install a sealing ring in the groove at the root of the hub connecting frame, apply sealant on the joint surface between the hub connecting frame and the hub, align the straight tooth bolt side of the hub downward with the center of the frame and the mounting hole, take 27 twelve-point head bolts and flat washers, and install the hub connecting frame. The connecting frame is fixed on the wheel hub, and the external clearance between the wheel hub connecting frame and the upper end cover is measured; Clearance adjustment: Use a dial indicator and a depth gauge to measure the dimensions that affect the clearance, and select a suitable clearance adjustment gasket, ensuring that its thickness is within ±0.07mm, and install the clearance adjustment gasket on the end face of the inner ring of the bearing; Assembly of the gear plate assembly and frame: Install the gear plate locating pin, freeze 16 hollow pins, align the gear ring assembly with the locating pin hole, install the hollow pins in the pin holes in sequence, and take 16 twelve-point head bolts to fix the gear ring assembly to the frame.

[0062] In this embodiment, the electric wheel assembly steps are as follows:

[0063] Step 1: Assemble the brake. Use the overall automatic disassembly and assembly robot to install the hollow O-ring in the hollow cylindrical joint groove of the frame, and align it with the center of the gearbox motor interface hole. Take 12 hexagonal bolts and flat washers, fix the test fixture on the frame, lock the brake with locking bolts, install a sealing ring in the groove at the root of the frame installation surface, apply sealant on the joint surface of the frame and the brake, align the brake with the center of the frame and the installation hole, take 27 twelve-point bolts and flat washers, install the brake on the frame, calculate the internal clearance using the cross-cross measurement method, and ensure that it is no more than 1mm, install the O-ring in the ring groove of the floating seal seat, install the elastic cylindrical pin in the pin hole of the floating seal seat, align the pin hole of the floating seal seat with the cylindrical pin groove of the frame, and ensure that it fits with the shoulder. In this step, the overall automatic disassembly and assembly robot is used to correctly install the O-ring and align the gearbox motor interface hole to ensure the sealing and stability of the brake and prevent brake fluid leakage. The cross-measurement method is used to calculate the internal clearance, ensuring that the internal clearance is no more than 1mm, which helps maintain the best performance and life of the brake. The overall automatic disassembly and assembly robot is used to accurately install the floating seal seat, which can ensure that the floating seal seat fits the shoulder and reduces the wear and maintenance requirements inside the brake.

[0064] Step 2: Install the inner ring of the bearing, find the corresponding tapered roller bearing, heat the inner ring of the bearing to 110°C, and use the overall automatic disassembly and assembly robot to install the large end face of the inner ring of the bearing facing up at the bearing stop position at the end of the frame. Cross-measure the distance between the inner ring of the bearing and the end face of the frame, and tap the end face of the inner ring of the bearing with a copper rod so that the deviation does not exceed 0.03mm. In this step, by heating the inner ring of the bearing to an appropriate temperature and tapping it accurately, the installation accuracy of the inner ring of the bearing can be ensured, the early wear of the bearing can be reduced, and its service life can be extended.

[0065] Step 3: Assemble the wheel hub, find the corresponding tapered roller bearing inner ring, heat the bearing inner ring to 110℃, use the overall automatic disassembly and assembly robot to install the bearing inner ring with the large end face facing down on the frame, tap the end face of the bearing inner ring with a nylon hammer to ensure that the gap between the bearing end face and the shoulder is no more than 0.03mm, install a sealing ring in the groove at the root of the hub connecting frame, apply sealant on the joint surface between the hub connecting frame and the hub, align the hub spur bolt side downward to the center of the frame and the mounting hole, take 27 twelve-point head bolts and flat washers, fix the hub connecting frame on the wheel hub, and measure the external gap between the hub connecting frame and the upper end cover. In this step, the overall automatic disassembly and assembly robot can accurately install and tap, which can ensure the installation accuracy of the hub bearing, as well as the stability of the hub bearing and reduce the need for subsequent maintenance.

[0066] Step 4: Clearance adjustment, use a dial indicator and depth gauge to measure the dimensions that affect the clearance, select a suitable clearance adjustment washer, ensure that its thickness is within ±0.07mm, and install the clearance adjustment washer on the end face of the inner ring of the bearing. In this step, by accurately adjusting the clearance to ensure that the bearing clearance is within the specified range, the friction loss and heat generation of the bearing can be reduced, and the overall operating efficiency can be improved.

[0067] Step 5: Assemble the gear disc assembly and the frame, use the overall automatic disassembly and assembly robot to install the gear disc positioning pin, freeze 16 hollow pins, align the gear ring assembly with the positioning pin hole, install the hollow pins in the pin holes in turn, and take 16 twelve-point head bolts to fix the gear ring assembly to the frame. In this step, by using positioning pins and frozen hollow pins, the long-term stability of the gear disc and gear ring can be ensured and the transmission error can be reduced.

[0068] In this embodiment, the precise assembly and good sealing performance of the electric wheel are ensured by adjusting the clearance and using the sealant, thereby improving the transmission efficiency and durability of the electric wheel.

[0069] Among them, the overall assembly steps also include: installing the first-stage sun gear and the first-stage planetary carrier assembly: freezing the limit pin, installing the rear small end downward in the center hole of the first-stage sun gear end, aligning the first-stage sun gear gear upward to the center of the frame, installing the first-stage friction plate on the limit pin, aligning the first-stage planetary carrier assembly with the center of the gear ring to ensure meshing; installing the second-stage planetary carrier assembly: leveling the torque tube with a spirit level, arranging the press-fit studs, heating the small end of the torque tube to 40°C, freezing the positioning pin, applying sealant on the joint surface between the second-stage planetary carrier and the torque tube, and installing the positioning pin. Install it in the pin hole of the torque tube, align the secondary planetary carrier with the center of the torque tube and the pin hole, take 4-6 nuts and install them to the end of the press-fit stud; assemble the torque tube and secondary planetary carrier assembly to the wheel hub: apply sealant on the joint surface of the wheel hub and the torque tube, align the torque tube and the secondary planetary carrier with the center and hole position of the wheel hub, take 18 hexagon socket round head bolts, and fix the torque tube on the wheel hub; Install the secondary sun gear: align the secondary sun gear with the center and spline of the secondary planetary carrier during installation, turn the gearbox over, and use a dial indicator and cross measurement method to select a suitable adjustment pad.

[0070] In this embodiment, the electric wheel assembly step further includes:

[0071] Step 6: Install the primary sun gear and primary planet carrier assembly, freeze the limit pin, and use the overall automatic disassembly and assembly robot to install the small end of the limit pin downward in the center hole of the primary sun gear end, align the primary sun gear gear upward to the center of the frame, install the primary friction plate on the limit pin, and align the primary planet carrier assembly with the center of the ring gear to ensure meshing. In this step, the positioning stability during installation is increased by freezing the limit pin, ensuring the correct installation of the primary sun gear and the correct meshing of the gears. In addition, installing the primary friction plate on the limit pin and aligning the primary planet carrier assembly with the center of the ring gear can accurately align the primary planet carrier assembly with the center of the ring gear, ensuring the accuracy of gear meshing and reducing noise and wear during transmission.

[0072] Step 7: Install the secondary planetary carrier assembly, use a level to level the torque tube, arrange the press-fit studs, heat the small end of the torque tube to 40°C, freeze the locating pins, apply sealant to the joint surface between the secondary planetary carrier and the torque tube, and then use the overall automatic disassembly and assembly robot to install the locating pins in the torque tube pin holes, align the secondary planetary carrier with the center of the torque tube and the pin holes, take 4-6 nuts, and install them to the ends of the press-fit studs. In this step, by using a level and press-fit studs, the level and precise position of the torque tube during installation can be ensured, reducing installation errors. In addition, heating the torque tube and freezing the locating pins can help improve the sealing of the joint surface and prevent lubricating oil leakage and the intrusion of external contaminants.

[0073] Step 8: Assemble the torque tube and secondary planetary carrier assembly to the wheel hub, apply sealant to the joint surface between the wheel hub and the torque tube, use the overall automatic disassembly and assembly robot to align the torque tube and the secondary planetary carrier with the center and hole of the wheel hub, take 18 hexagon socket round head bolts, and fix the torque tube to the wheel hub. In this step, apply sealant to the joint surface between the wheel hub and the torque tube, and use hexagon socket round head bolts to fix the torque tube, which can improve the stability and sealing of the entire assembly and reduce maintenance requirements.

[0074] Step 9: Install the secondary sun gear. When using the overall automatic disassembly and assembly robot to install, align the secondary sun gear with the center and spline of the secondary planet carrier, turn the gear box over, and use the dial indicator and cross measurement method to select the appropriate adjustment pad. In this step, by aligning the secondary sun gear with the center and spline of the planet carrier, and then using the dial indicator and cross measurement method to select the appropriate adjustment pad, you can ensure the accuracy of the gear meshing between the secondary sun gear and the planet carrier, and reduce noise and wear during the transmission process.

[0075] In this embodiment, the correct position of the primary and secondary sun gears is ensured by the precise installation of the limit pins and the adjustment pads, thereby improving the transmission accuracy and power output efficiency of the electric wheel.

[0076] Furthermore, the overall assembly steps also include: installation of studs on the gearbox side of the electric wheel: take 54 studs into the threaded holes of the wheel hub on the side of the electric gearbox, install 9 stud sleeves, nuts, and flat washers, and install the nameplate to the milled end face of the arc groove on the large end of the electric wheel frame; motor assembly: install the O-ring in the ring groove, apply sealant on the frame and the motor installation end face, align the motor with the gearbox motor interface and engage the spline, take 12 hexagonal bolts and flat washers, and fix the motor on the frame; adjust the clearance: use a dial indicator and cross measurement method to select a suitable adjustment pad; assembly of the sun gear end cover and the secondary planetary carrier end face: install the end cover locating pin on the secondary planetary carrier, install the secondary friction plate on the end of the secondary sun gear, put on the O-ring, take 11 hexagonal bolts and flat washers, and fix the end cover on the end face of the secondary planetary carrier.

[0077] In this embodiment, the electric wheel assembly step further includes:

[0078] Step 10: Install the studs on the side of the electric wheel gearbox. Take 54 studs and install them into the threaded holes of the wheel hub on the side of the electric gearbox. Install 9 stud sleeves, nuts, and flat washers, and install the nameplate to the milled end face of the arc groove on the large end of the electric wheel frame. In this step, the studs are installed into the threaded holes of the wheel hub on the side of the electric gearbox by the overall automatic disassembly and assembly robot, and stud sleeves, nuts, and flat washers are used to enhance the connection strength and stability of the wheel hub on the gearbox side and reduce vibration and looseness during operation. In addition, the installed nameplate usually contains the model, specifications, and manufacturing information of the equipment, which is convenient for operators to manage and maintain the equipment.

[0079] Step 11: Motor assembly, use the overall automatic disassembly and assembly robot to install the O-ring in the ring groove, apply sealant to the frame and motor mounting end face, align the motor with the gearbox motor interface and engage the spline, take 12 hexagonal bolts and flat washers, and fix the motor on the frame. In this step, applying sealant on the frame and motor mounting end face and installing the O-ring can improve the sealing performance of the motor, reduce maintenance requirements and extend the life of the motor. In addition, the overall automatic disassembly and assembly robot uses hexagonal bolts and flat washers to fix the motor on the frame, which can ensure the stability of the motor during operation and reduce the adverse effects on the gearbox.

[0080] Step 12: Adjust the clearance and select the appropriate adjustment pad using the dial indicator and cross measurement method. In this step, by accurately measuring and selecting the appropriate adjustment pad, the meshing clearance of the gear can be optimized, the noise and wear during the transmission process can be reduced, and the transmission efficiency can be improved.

[0081] Step 13: Assemble the end cover of the sun gear and the end face of the secondary planetary carrier. Use the overall automatic disassembly and assembly robot to install the end cover locating pin on the secondary planetary carrier, install the secondary friction plate and the end of the secondary sun gear, put on the O-ring, take 11 hexagonal bolts and flat washers, and fix the end cover on the end face of the secondary planetary carrier. In this step, by installing the end cover locating pin and the secondary friction plate, the connection strength and stability between the end cover and the secondary planetary carrier can be improved, and vibration and looseness during operation can be reduced. In addition, by using the overall automatic disassembly and assembly robot to fix the end cover on the end face of the secondary planetary carrier with hexagonal bolts and flat washers, the sealing performance of the end cover can be improved, and the intrusion of pollutants and leakage of lubricating oil can be reduced.

[0082] In this embodiment, the balance and sealing of the electric wheel are ensured through precise gap adjustment and end cover fixation, thereby improving the overall performance and operation stability of the electric wheel.

[0083] The electric wheel maintenance method for mining trucks provided by the present application effectively improves the maintenance efficiency and assembly accuracy through the automated equipment operation process, reduces the maintenance cost, and improves the operating efficiency and safety of mining trucks. In addition, through precise measurement and adjustment, the reasonable gap between the various components of the electric wheel is guaranteed, the overall performance and reliability of the electric wheel are improved, and it is suitable for the maintenance and maintenance of the electric wheel under complex working conditions. Especially in large-scale mining operation environments, the application of this method can reduce the downtime caused by electric wheel failure and improve work efficiency. Moreover, the electric wheel maintenance method for mining trucks provided by the present application interacts with each work step in the process, can identify the work content of the personnel at different stages of each step, realize the guidance of automated maintenance, effectively improve the process standardization and reliability of automated maintenance, and at the same time can greatly improve work efficiency and achieve the purpose of lean production. It can also effectively improve the work efficiency of digital maintenance, reduce the work intensity of maintenance personnel, reduce labor costs, greatly shorten the maintenance cycle, thereby improving the quality of maintenance, and ultimately achieve the purpose of reducing costs and increasing efficiency. It can also effectively reduce the work intensity of operators and reduce the adverse effects of dust, noise, etc. on the environment and physical and mental health.

[0084] The above is only an optional embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0085] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0086] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of this solution. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being only exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so that once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0087] In the description of this scheme, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing this scheme and simplifying the description. Unless otherwise stated, these directional words 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. Therefore, they cannot be understood as limiting the scope of protection of this scheme; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0088] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0089] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only to facilitate the distinction between corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this scheme.

Claims

1. A method for repairing electric wheels of mining trucks, characterized in that: It includes overall disassembly step, component disassembly step, component assembly step and overall assembly step, wherein: The overall disassembly step includes the overall disassembly of multiple components in the electric wheel, and the overall assembly step includes the overall assembly of multiple components in the electric wheel; the equipment used in the overall disassembly step and the overall assembly step includes a flip table, an overall automatic disassembly and assembly robot, an electric mobile platform, a disassembly assist arm, and a tightening assist arm, the flip table is used to flip, rotate and lift the electric wheel, the overall automatic disassembly and assembly robot is used to disassemble or tighten the high-torque bolts of the electric wheel located on the flip table, the electric mobile platform serves as an operator's working platform, the electric mobile platform can be moved and lifted horizontally, the disassembly assist arm and the tightening assist arm are both located on the electric mobile platform, the disassembly assist arm is used to manually assist in disassembling the high-torque bolts of the electric wheel, and the tightening assist arm is used to manually assist in tightening the high-torque bolts of the electric wheel; The component disassembly step includes disassembling parts from multiple components in the electric wheel, and the component assembly step includes assembling parts from multiple components in the electric wheel; the equipment used in the component disassembly step and the component assembly step includes a positioning tool, a running mechanism and an automatic component disassembly and assembly robot, the positioning tool is used to clamp and position parts, the positioning tool is installed on the running mechanism, the running mechanism is used to drive the positioning tool to move in a straight line, and the automatic component disassembly and assembly robot is used to disassemble or tighten the high-torque bolts of the components located on the positioning tool.

2. The method for repairing electric wheels of mining trucks according to claim 1, characterized in that: The equipment used in the electric wheel maintenance method for mining trucks also includes an electric control cabinet, a robot control cabinet, a hydraulic pump station, a tool platform, a bolt placement box and a safety fence.

3. The method for repairing electric wheels of mining trucks according to claim 1, characterized in that: The overall disassembly steps include: Disassemble the motor: Place the electric wheel horizontally, remove the 12 hexagonal bolts connecting the motor and the frame, and separate the motor and the frame; Drain the gearbox lubricating oil: Remove the drain bolt on the secondary planetary carrier and drain the gearbox lubricating oil; Drain the brake oil: turn the electric wheel over, open the oil valve to drain the brake oil, and remove the 8 twelve-point head bolts; Disassemble the secondary sun gear end cover: Remove the 11 hexagonal bolts on the end cover and separate the end cover from the low-speed planet carrier; Disassemble the secondary planetary carrier assembly and the secondary sun gear: first remove the 8 square-head magnetic plugs on the end face of the secondary planetary carrier, and then remove the 35 twelve-point head bolts on the secondary planetary carrier to separate the secondary planetary carrier from the torque tube; Disassemble the primary planetary carrier assembly and the primary sun gear: separate the primary planetary carrier assembly from the primary sun gear.

4. The method for repairing electric wheels of mining trucks according to claim 3, characterized in that: The overall disassembly step also includes: Disassemble the torque tube, gear ring, and sprocket: Remove the 18 hexagon socket head bolts, 9 sets of hexagon nuts and studs between the torque tube and the wheel hub, separate the torque tube from the wheel hub, then remove the 8 sets of hexagon head bolts connecting the gear ring and the sprocket, separate the gear ring from the baffle, and continue to remove the 16 twelve-pointed head bolts between the sprocket and the frame, and separate the sprocket from the frame; Disassemble the wheel hub and bearing: remove the 27 twelve-point bolts of the wheel hub and the wheel hub connecting frame, separate the wheel hub from the wheel hub connecting frame, continue to disassemble the upper shaft inner ring of the lower wheel hub, then disassemble the bearing outer ring, and finally disassemble the bearing inner ring on the frame; Disassemble the floating seal seat: Disassemble the floating oil seal between the floating seal seat and the wheel hub connecting frame; Disassembling the brake: Remove the 27 twelve-point head bolts connecting the frame and the piston end cover, and separate the brake from the frame.

5. The method for repairing electric wheels of mining trucks according to claim 1, characterized in that: The component disassembly step comprises: Disassembly of the hub connecting frame: remove the 12 hexagonal bolts of the hub connecting frame and the seal bracket, then remove the 32 twelve-pointed bolts of the hub gear ring and the hub connecting frame, and separate the hub gear ring, the seal bracket and the hub connecting frame; Wet brake disassembly: remove the 6 sets of brackets on the inner gear ring of the brake, a total of 12 external hexagonal bolts, then remove the 48 twelve-pointed bolts between the upper end cover and the inner gear ring of the brake, separate the upper end cover, and then remove the 54 twelve-pointed bolts between the brake piston end cover and the inner gear ring, then remove the 12 external hexagonal bolts on the end face of the brake piston, separate the inner gear ring, piston and piston end cover, and finally remove the screw plug on the piston end cover and the brake oil drain tooling; Disassembly of the secondary planetary carrier assembly: Remove the 8 twelve-point head bolts on the secondary planetary carrier, pull out the 4 secondary planetary pins, separate the secondary planetary gear and the secondary planetary carrier, repeat to separate the remaining three secondary planetary gears, continue to remove the 6 twelve-point head bolts on the primary planetary carrier, pull out the 3 primary planetary pins, separate the 3 primary planetary gears on the primary planetary carrier, and remove the bearings on the primary planetary gears.

6. The method for repairing electric wheels of mining trucks according to claim 1, characterized in that: The component assembly steps include: Hub pre-assembly: With the motor side facing upward, heat the hub bearing outer ring installation part to 60°C, take the outer ring of a tapered roller bearing, install the large end of the bearing outer ring to the hub bearing stop, and tap with a nylon hammer to ensure that the clearance between the bearing end face and the stop shoulder is no more than 0.03mm, and repeat this step with the gearbox side facing upward; Pre-assembly of the gear ring and the toothed disc: Align the toothed disc with the center of the gear ring, drop it steadily, take two hexagonal bolts and one anti-loosening washer, install the baffle on the gear ring, and repeat this step to install the other 7 baffles; First-stage planetary gear assembly: Heat the first-stage planetary gear to 110°C, place a spherical roller bearing on the bearing pad, align the planetary gear with the center of the bearing, install another spherical roller bearing in the inner hole at the upper end of the planetary gear, use a nylon hammer to knock the gear and the end face of the outer ring of the bearing to ensure that the end face of the outer ring of the bearing fits the shoulder, and repeat this step to assemble the other two first-stage planetary gears; Assembly of the first-stage planetary carrier: Apply blue oil to the two groups of four continuous tooth surfaces on the three first-stage planetary wheels, assemble the two first-stage planetary wheels into the first-stage planetary carrier, and align the inner holes and pin holes of the planetary wheel bearings. Install the limit ring assembly in the step hole on the lower side of the first-stage planetary carrier spline. Assemble the third first-stage planetary wheel into the first-stage planetary carrier, align the inner holes and pin holes of the planetary wheel bearings; freeze the planetary pins and install them in the pin holes of the planetary carrier. Use a nylon hammer to knock the end faces so that the planetary pin shoulder fits with the end face of the inner ring of the bearing, and then perform anti-rust treatment. Take 6 twelve-point head bolts, lubricate, prevent loosening, and lock glue them, and install them in the three planetary pins respectively. Secondary planetary gear assembly: Place a spherical roller bearing on the bearing pad in the center, heat the secondary planetary gear to 110°C, align the planetary gear with the center of the bearing and drop it, install another spherical roller bearing in the inner hole of the planetary gear, and use a nylon hammer to hit the gear and the end face of the outer ring of the bearing to ensure that the end face of the outer ring of the bearing fits the shoulder, and repeat this step to install the other two secondary planetary gears; Secondary planetary carrier assembly: Freeze 4 secondary planetary pins, apply blue oil on 2 groups of 4 continuous tooth surfaces on these secondary planetary wheels, assemble 4 secondary planetary wheels in the secondary planetary carrier in turn, align the inner hole of the planetary wheel bearing and the pin hole of the planetary carrier, install the frozen planetary pins in the pin holes, hit the end faces of the planetary pins with a nylon hammer to make the planetary pin shoulder fit with the end face of the inner ring of the bearing, perform anti-rust treatment, then take 8 twelve-point head bolts, lubricate, prevent loosening and lock with glue, and install them in the 4 planetary pins respectively, take 8 square head magnetic screw plugs, install them in turn at the ends of the secondary planetary carrier, and then install the end cover locating pins on the secondary planetary carrier; Assembly of the secondary planetary carrier and torque tube: Heat the torque tube to 80°C, freeze the locating pins, apply sealant on the torque tube joint surface, install the locating pins in the torque tube pin holes, align the secondary planetary carrier with the center of the torque tube and the pin holes, take 35 twelve-point head bolts, and fix the secondary planetary carrier assembly on the torque tube.

7. The method for repairing electric wheels of mining trucks according to claim 6, characterized in that: The component assembly step also includes: Wet brake assembly: install 3 hexagonal O-ring plugs on the plane of the piston end cover, and then install 1 hexagonal O-ring plug on the lower plane of the piston end cover, take 8 hexagonal bolts and 8 flat washers, install 2 oil baffles and O-rings on the motor side of the piston end cover, install the large and small circular grooves of the grid ring in the groove, and apply brake oil, align the piston installation return mechanism with the countersunk hole on the piston end cover, take 12 hexagonal bolts, spring sleeves, return springs, and fix the piston on the piston end cover, apply locking glue to the threads, take 1 sealing ring and install it in the groove on the end face of the gear ring, align the inner gear ring with the piston end cover Install the holes, apply sealant on the joint surface, take 54 twelve-point bolts and flat washers to fix the piston end cover and the inner gear ring, align the wheel hub with the center of the piston inner hole, install the damping plate, friction plate and isolation plate, take a sealing ring and install it to the groove on the end face of the gear ring, install the skeleton oil seal in the inner hole of the upper end cover, align the upper end cover with the stopper and the installation hole of the inner gear ring, take 48 twelve-point bolts and flat washers, fix the brake upper end cover and the inner gear ring, measure the depth H1 of the two end faces of the upper end cover and the depth H2 of the two end faces of the seal bracket, take 6 hexagonal heads and flat washers to install the bracket to the end face position of the gear box side of the upper end cover, and install half of the floating sealing ring on the wheel hub connecting frame; Assembly of the wheel hub frame: Install the sealing ring to the wheel hub frame, install the floating sealing ring in the upper end cover installation position, take 12 hexagonal bolts and anti-loosening washers, install the sealing bracket to the wheel hub frame, add adjustment gaskets, align the brake hub gear ring with the wheel hub frame, take 32 twelve-pointed bolts and thickened flat washers and install them on the hub gear ring and the wheel hub frame in sequence.

8. The method for repairing electric wheels of mining trucks according to claim 1, characterized in that: The overall assembly steps include: Assemble the brake: install the hollow O-ring in the hollow cylindrical joint groove of the frame, and align it with the center of the gearbox motor interface hole. Take 12 hexagonal bolts and flat washers, fix the test fixture on the frame, lock the brake with locking bolts, install a sealing ring in the groove at the root of the frame installation surface, apply sealant on the joint surface of the frame and the brake, align the brake with the center of the frame and the installation hole, take 27 twelve-point bolts and flat washers, install the brake on the frame, calculate the internal clearance using the cross measurement method, and ensure that it is no more than 1mm, install the O-ring in the ring groove of the floating seal seat, install the elastic cylindrical pin in the pin hole of the floating seal seat, align the pin hole of the floating seal seat with the cylindrical pin groove of the frame to ensure that it fits the shoulder; Install the inner ring of the bearing: find the corresponding tapered roller bearing, heat the inner ring of the bearing to 110℃, and install the inner ring of the bearing with the large end facing upwards at the bearing stop position at the end of the frame; measure the distance between the inner ring of the bearing and the end face of the frame in a cross shape, and knock the end face of the inner ring of the bearing with a copper rod to ensure that the deviation does not exceed 0.03mm; Assemble the wheel hub: find the corresponding inner ring of the tapered roller bearing, heat the inner ring of the bearing to 110℃, install the large end of the inner ring of the bearing on the frame with the face downward, hit the end face of the inner ring of the bearing with a nylon hammer to ensure that the clearance between the end face of the bearing and the shoulder is no more than 0.03mm, install a sealing ring in the groove at the root of the hub connecting frame, apply sealant on the joint surface between the hub connecting frame and the hub, install the hub spur bolt side downward to the center of the frame and the mounting hole, take 27 twelve-point head bolts and flat washers, fix the hub connecting frame on the wheel hub, and measure the external clearance between the hub connecting frame and the upper end cover; Clearance adjustment: Use a dial indicator and a depth gauge to measure the dimensions that affect the clearance, and select a suitable clearance adjustment washer to ensure that its thickness is within ±0.07mm, and install the clearance adjustment washer on the end face of the inner ring of the bearing; Assembly of the gear disc assembly and the frame: Install the gear disc locating pins, freeze 16 hollow pins, align the gear ring assembly with the locating pin holes, install the hollow pins in the pin holes one by one, and use 16 twelve-point head bolts to fix the gear ring assembly to the frame.

9. The method for repairing electric wheels of mining trucks according to claim 8, characterized in that: The overall assembly step also includes: Install the primary sun gear and primary planet carrier assembly: freeze the limit pin, install the small end downward in the center hole of the primary sun gear end, align the primary sun gear gear upward to the center of the frame, install the primary friction plate on the limit pin, align the primary planet carrier assembly with the center of the gear ring to ensure meshing; Install the secondary planet carrier assembly: Use a level to level the torque tube, arrange the press-fit studs, heat the small end of the torque tube to 40°C, freeze the positioning pins, apply sealant to the joint surface between the secondary planet carrier and the torque tube, install the positioning pins in the torque tube pin holes, align the secondary planet carrier with the center of the torque tube and the pin holes, and install them. Take 4-6 nuts and install them to the ends of the press-fit studs; Assemble the torque tube and secondary planet carrier assembly to the wheel hub: Apply sealant to the joint surface between the wheel hub and the torque tube, align the torque tube and the secondary planet carrier with the center and hole position of the wheel hub, and take 18 hexagon socket head bolts to fix the torque tube on the wheel hub; Install the secondary sun gear: During installation, align the secondary sun gear with the center and spline of the secondary planetary carrier, turn the gearbox over, and use a dial indicator and cross measurement method to select the appropriate adjustment pad.

10. The method for repairing electric wheels of mining trucks according to claim 9, characterized in that: The overall assembly step also includes: Installation of studs on the side of the electric wheel gearbox: Take 54 studs and put them into the threaded holes of the wheel hub on the side of the electric gearbox, install 9 stud sleeves, nuts, and flat washers, and install the nameplate to the milled end face of the arc groove on the large end of the electric wheel frame; Motor assembly: Install the O-ring in the groove, apply sealant on the frame and the motor mounting end surface, align the motor with the gearbox motor interface and engage the spline, take 12 hexagonal bolts and flat washers, and fix the motor on the frame; Adjust the gap: Use a dial indicator and the cross measurement method to select the appropriate adjustment pad; Assemble the sun gear end cover and the secondary planet carrier end face: install the end cover locating pin on the secondary planet carrier, install the secondary friction plate on the end of the secondary sun gear, put on the O-ring, take 11 hexagonal bolts and flat washers, and fix the end cover on the end face of the secondary planet carrier.

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