A special motor dismounting and mounting auxiliary tool for mine cards

Abstract

The application provides a special motor dismounting and mounting auxiliary tool for a mine card, which comprises a top guiding assembly and a bottom fixing assembly. By arranging the top guiding assembly, the uniform distance between the rotor and the stator in each direction can be ensured during hoisting in the dismounting or mounting process, so that the rotor and the stator are prevented from colliding due to being too close in a direction under the action of suction. By arranging the bottom fixing assembly, the position of the casing and the stator can be kept fixed during the dismounting and mounting process, so that the casing position is prevented from deviating or toppling to cause motor damage or personnel injury. Through cooperation of the top guiding assembly and the bottom fixing assembly, the lower part is fixed and the upper part is guided, the shaking of the mine card motor during the dismounting and mounting process is prevented, and safety and stability are ensured.

Description

Technical Field

[0001] This utility model relates to the field of motors, specifically to an auxiliary tooling for disassembling and assembling a special motor for mining trucks. Background Technology

[0002] Mining truck motors are core components ensuring the power output of mining trucks, mainly consisting of stators, rotors, end covers, and bearings. Currently used permanent magnet motors for mining trucks are characterized by their large size and overall weight due to the high power and load requirements of mining applications. Furthermore, the strong magnetic attraction between the permanent magnet rotor and the high-permeability material used in the stator presents significant challenges for motor assembly and disassembly.

[0003] During the disassembly and assembly of mining truck motors, the core requirement is that the rotor must maintain a uniform and stable posture during the stator insertion process to avoid collisions and shaking. However, due to the characteristics of mining truck motors, existing disassembly and assembly processes face numerous technical challenges.

[0004] The existing disassembly method for mining truck motors is as follows: place the motor upright on a stand, first remove the connecting bolts between the upper end cover and the casing, then connect the motor shaft using hoisting equipment, and directly pull the rotor upwards.

[0005] However, during disassembly, the rotor is prone to swaying due to uneven lifting force or attraction, which can cause it to collide with the stator and casing, resulting in core deformation, damage to permanent magnets, or even casing tipping over, thus posing a safety risk.

[0006] The existing assembly method for mining truck motors is as follows: the motor is placed upright on a stand, and the rotor and upper end cover are assembled and then hoisted into the casing. Due to the strong magnetic attraction between the rotor and stator, the operator needs to apply considerable downward pressure to stably push the assembly process; otherwise, the rotor and stator will attract each other. Therefore, the usual practice is to pass the connecting bolts through the bolt holes of the end cover to the casing during the rotor lowering process, thereby indirectly increasing the downward pressure of the assembly with the bolt preload, and simultaneously tightening all the connecting bolts between the end cover and the casing to finally complete the assembly.

[0007] However, this method has significant drawbacks: the force transmission path is unreasonable, and some of the force is transmitted to the bearing through the end cover, causing the axial force on the bearing to far exceed the design tolerance range, which directly affects the subsequent operating accuracy and life of the motor.

[0008] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this application. Utility Model Content

[0009] The purpose of this utility model is to provide an auxiliary tool for disassembling and assembling a special motor for mining trucks, so as to ensure safety and stability during the disassembly and assembly process of the special motor for mining trucks.

[0010] To achieve the above objectives, the technical solution adopted by this utility model is: an auxiliary tooling for disassembling and assembling a mining truck motor, used in the disassembly and assembly process of the mining truck motor. The mining truck motor includes a rotor, a stator, a shaft, a bearing, an end cover, and a housing. The end cover has a first axial hole, the upper end face of the housing has a second axial threaded hole, and the outer side of the housing has feet. The auxiliary tooling for disassembling and assembling the special motor for mining trucks includes a top guide assembly and a bottom fixing assembly; The top guide assembly includes a ring seat, an extension arm, and a long bolt. The ring seat is fitted onto the output end of the rotating shaft, and a thread is provided on the inner side of the ring seat. The ring seat and the output end of the rotating shaft are locked together by the thread. The first end of the extension arm is bolted to the ring seat, and the second end extends above the first axial hole of the end cap, and a through hole corresponding to the first axial hole is provided on the second end. The long bolt passes through the through hole, the first axial hole, and the second axial threaded hole in sequence. The long bolt is clearance-fitted with the through hole and the first axial hole, and is threaded or clearance-fitted with the second axial threaded hole. The bottom fixing assembly includes a base plate and a connecting plate, which are connected vertically in an L-shape. The connecting plate has a housing connection hole and is connected to the base foot by bolts. The base plate has a frame connection hole and is connected to the frame by bolts.

[0011] In the above scheme, the top guide assembly is used to ensure that the rotor and stator maintain a uniform distance in all directions during the disassembly or assembly hoisting process, so as to avoid them getting too close in one direction and thus colliding under the action of suction.

[0012] The bottom fixing component is used to keep the housing and stator in place during disassembly and assembly, preventing the housing from shifting or tipping over, which could cause damage to the motor or personal injury.

[0013] The combination of the top guide component and the bottom fixing component achieves lower fixing and upper guidance, preventing shaking during disassembly and assembly, and ensuring safety and stability.

[0014] In addition, the top guide assembly and the bottom fixing assembly make full use of the structure of the mining truck motor itself. The ring seat is connected by the thread of the output end of the shaft itself, the extension arm and the long bolt are matched by the openings of the end cover and the housing itself, and the bottom fixing assembly is connected to the housing by the feet on the housing itself, thus assisting the disassembly and assembly process without changing the motor structure.

[0015] In a further technical solution, when disassembling the mining truck motor, the top guide assembly also includes a washer and a nut. The washer is placed on the second axial threaded hole, the nut is placed below the first axial hole, and the long bolt passes through the through hole and the first axial hole and is threadedly connected to the nut. The end of the long bolt rests against the washer.

[0016] In the above solution, by adding shims and nuts during the disassembly process, the long bolts can be tightened with a counter-rotating force to achieve uniform and stable separation of the stator and rotor.

[0017] In a further technical solution, a slot is provided on the outer side of the ring seat, at least a portion of the first end of the extension arm is inserted into the slot, an axial connection hole is provided on the ring seat, and the ring seat and the extension arm are connected by an axial connection bolt passing through the axial connection hole.

[0018] In the above solution, by setting a slot, a dual connection of slot engagement and bolt fixation can be formed, which strengthens the structure at the connection between the ring seat and the extension arm, and distributes the bolt force to the contact surface between the slot and the bolt, avoiding local stress concentration, reducing the risk of component damage, and ensuring structural stability during hoisting.

[0019] In a further technical solution, the first end of the extension arm includes a first support arm and a second support arm, with an insertion interface formed between the first support arm and the second support arm. The first support arm rests on the upper surface of the ring seat, and the second support arm is inserted into the slot of the ring seat. The insertion interface is engaged with the outer side of the ring seat above the slot. The axial connecting bolt passes sequentially through the first support arm, the ring seat above the slot, the second support arm, and the ring seat below the slot.

[0020] In the above scheme, the first and second arms of the extension arm form a U-shaped groove structure, which wraps around the upper and lower surfaces and sides of the ring seat. The extension arm and the ring seat form a nested structure that interlocks with each other, which further strengthens the structure of this part and distributes the force of the extension arm to the two arms, avoiding deformation of a single arm under stress.

[0021] In a further technical solution, multiple extension arms are provided, and they are symmetrically arranged about the center of the ring base.

[0022] In the above scheme, the extension arm, which is centrally symmetrically arranged, can reduce the tilt angle of the rotor during hoisting, thus avoiding scratching with the stator; and can also ensure that the force distribution on the ring seat is uniform, thus preventing deformation of the ring seat.

[0023] In a further technical solution, the first end of the extension arm is connected to the ring seat by two axial connecting bolts. The ring seat has two axial connecting holes corresponding to each extension arm, and the two axial connecting holes are arranged parallel to each other in the radial direction of the ring seat.

[0024] In the above solution, the double axial connecting bolts installed inside and outside can prevent the extension arm from twisting during hoisting, increase redundancy, and improve hoisting safety.

[0025] In a further technical solution, a reinforcing rib is provided between the connecting plate and the base plate of the bottom fixing component. In the above solution, by providing reinforcing ribs, the overall strength of the bottom fixing component can be improved.

[0026] A further technical solution involves designing the frame connection hole as an oblong hole, extending in a direction perpendicular to the connecting plate. This oblong hole design increases the adjustment range, making it suitable for motors of different diameters.

[0027] The auxiliary tooling for disassembling and assembling a special motor for mining trucks provided in this application has the following beneficial effects: By incorporating a top guide assembly, a uniform distance is maintained between the rotor and stator in all directions during disassembly or assembly, preventing them from getting too close in one direction and colliding under suction. The bottom fixing assembly keeps the housing and stator in place during disassembly and assembly, preventing housing displacement or tipping that could damage the motor or cause injury. The combined use of the top guide and bottom fixing assemblies provides both lower fixation and upper guidance, preventing shaking during disassembly and assembly of the mining truck motor and ensuring safety and stability. Furthermore, the core components of the auxiliary tooling used in both disassembly and assembly processes are identical; only a few parts need to be changed to switch operating conditions, achieving structural reuse and reducing the number of tooling components. Attached Figure Description

[0028] Appendix Figure 1 This is a schematic diagram of a mining truck motor structure; Appendix Figure 2 This is a schematic diagram illustrating the disassembly process of an existing mining truck motor. Appendix Figure 3 This is a schematic diagram of the assembly process for an existing mining truck motor. Appendix Figure 4 This is a schematic diagram of force transmission during the assembly process of an existing mining truck motor. Appendix Figure 5 This is a schematic diagram illustrating the assembly and disassembly auxiliary tooling for the mining truck motor and its installation with the motor, according to an embodiment of this utility model. Appendix Figure 6 for Figure 4 A magnified view of a portion of the image; Appendix Figure 7This is a structural diagram of the top guide component; Appendix Figure 8 This is a top view of the top guide assembly; Appendix Figure 9 For the appendix Figure 8 Schematic diagram of section AA; Appendix Figure 10 This is a schematic diagram showing the installation and assembly of the bottom fixing component and the motor. Appendix Figure 11 This is a structural diagram of the bottom fixing component; In the attached diagrams: 1. Mining truck motor; 11. Rotor; 12. Stator; 13. Shaft; 14. Bearing; 15. End cover; 151. First axial hole; 16. Housing; 161. Second axial threaded hole; 162. Foot; 17. Connecting bolt; 2. Top guide assembly; 21. Ring seat; 21a. Slot; 22. Extension arm; 221. First end; 221a. First support arm; 221b. Second support arm; 222. Second end; 223. Connecting part; 23. Long bolt; 24. Axial connecting bolt; 25. Through hole; 3. Bottom fixing assembly; 31. Base plate; 311. Stand connection hole; 32. Connecting plate; 321. Housing connection hole; 33. Reinforcing rib; 4. Platform; 5. Lifting rings; 6. Lifting equipment. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0030] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0031] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0032] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0033] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0034] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0035] The most common type of motor used in mining trucks is the permanent magnet synchronous motor, and its main structure is shown in the attached figure. Figure 1 As shown, the assembly includes a rotor 11, a stator 12, a shaft 13, a bearing 14, an end cover 15, and a housing 16. The assembly relationship and function of each component are as follows: The stator 12 is fixedly installed inside the housing 16, and the rotor 11 is coaxially embedded inside the stator 12, forming an "inner rotor-outer stator" structure. Three-phase windings are wound in the slots of the stator core, and permanent magnets (such as neodymium iron boron magnets) are embedded on the surface or inside the rotor core. A uniform air gap is reserved between the stator 12 and the rotor 11. When energized, the stator windings generate a rotating magnetic field, which interacts with the magnetic field of the rotor permanent magnets, driving the rotor 11 to rotate synchronously, and then outputting power through the shaft 13.

[0036] Even when not powered on, the residual magnetism of the rotor permanent magnet will still generate a magnetic attraction force between it and the stator core. This attraction force increases significantly as the gap between the stator and rotor decreases, which can easily lead to component misalignment or collision during motor assembly and disassembly.

[0037] The rotor 11 is coaxially fixedly connected to the shaft 13 by a flat key or interference fit. The power output end of the shaft 13 extends axially from the end cover 15 on the upper part of the housing 16, and the outer circular surface of the output end is machined with external threads. This structure is used to connect with the transmission system of a mining truck to transmit power to the wheels.

[0038] A bearing 14, such as a deep groove ball bearing or a cylindrical roller bearing, is fitted at the mating point between the shaft 13 and the end cover 15. The inner ring of the bearing 14 is interference-fitted with the shaft 13, and the outer ring is interference-fitted with the end cover 15. Its core function is to limit the radial displacement of the shaft 13 while ensuring the high-speed and smooth rotation of the shaft 13. Therefore, the bearing 14 mainly bears radial force and only bears a small amount of axial force caused by assembly deviation.

[0039] See Figure 6The end cap 15 has multiple first axial holes 151, which are evenly distributed around the circumference. On the upper surface of the housing, corresponding to the positions of the first axial holes 151, there is an equal number of second axial threaded holes 161. During assembly... Figure 1 As shown, by sequentially passing the connecting bolts 17 through the first axial hole 151 and screwing them into the second axial threaded hole 161 to lock them in place, the end cover 15 and the housing 16 can be sealed together.

[0040] like Figure 1 As shown, the housing 16 has an overall cylindrical structure with annular and axial reinforcing ribs on its outer surface to enhance its resistance to deformation and adapt to the impact load under the bumpy conditions of the mining truck. On the opposite sides of the outer surface of the housing 16, there are also 2-4 feet 162 along the axial direction. These feet 162 are integrally cast with the housing 16. Each foot 162 has a threaded hole on its end face for fixing the housing 16 to the frame (or motor mounting bracket) of the mining truck with bolts to ensure that the motor remains stable during the movement of the mining truck and to prevent the parts from loosening or shifting due to vibration.

[0041] like Figure 2 As shown, in the disassembly process of existing mining truck motors, the motor must first be placed upright on a stand. After removing the connecting bolts 17 between the upper end cover 15 and the housing 16, a lifting ring 5 is installed in the threaded hole at the top of the shaft. The lifting ring is then connected via a lifting device 6 to pull the rotor 11 out of the stator 12. During this process, it is necessary to strictly ensure that the lifting direction is vertically upward to avoid collision between the rotor 11 and the stator 12. However, due to the large size and weight of the mining truck motor, it is difficult to ensure that the center of gravity and the lifting force line are on the same straight line when lifting the rotor. Furthermore, the magnetic attraction between the stator and rotor will further amplify the offset tendency, increasing the risk of component scratch damage. At the same time, the attraction between the stator and rotor during disassembly will generate an upward pulling force on the stator, making it difficult to ensure the stability of the housing 16. The housing 16 may be pulled up or tipped over, posing a safety hazard. Moreover, the overall operation requires multiple people to cooperate, resulting in poor disassembly convenience. Collisions may also cause component deformation and damage, leading to economic losses.

[0042] like Figure 3 As shown, in the assembly process of existing mining truck motors, the motor needs to be placed upright on the platform first, and then the rotor 11 and the upper end cover 15 are hoisted into the housing 16 as a whole. However, due to the large suction between the stator and rotor, insufficient downward pressure during assembly will lead to unstable lowering, making assembly difficult.

[0043] In traditional manual assembly methods, to increase downward pressure, the connecting bolts 17 between the end cover 15 and the housing 16 are tightened simultaneously during the lowering process, using the tightening force of the connecting bolts 17 to press the rotor down. However, as... Figure 4As shown, the reaction force generated in this manner is transmitted to the end cap 15 through the connecting bolt 17, and then to the bearing 14 between the end cap 15 and the rotating shaft 13, as follows. Figure 4 As shown by the red arrow in the figure. At the same time, the force generated by the hoisting shaft is also transmitted to bearing 14, as shown by the green arrow in the figure, causing the axial force on bearing 14 to far exceed the design tolerance range, which can easily cause damage to bearing 14.

[0044] Figure 5 The illustration shows the auxiliary tooling for disassembling and assembling a mining truck motor provided in this embodiment and the assembly state of the mining truck motor. The auxiliary tooling for disassembling and assembling a mining truck motor includes a top guide assembly 2 and a bottom fixing assembly 3. The top guide assembly 2 is used to connect and guide the rotor 11 during motor disassembly and assembly, and the bottom fixing assembly 3 is used to fix the positions of the housing 16 and the stator 12.

[0045] Among them, the top guide component 2, such as Figures 6 to 9 As shown, it includes a ring seat 21, an extension arm 22, and a long bolt 23. In this embodiment, the ring seat 21 is generally circular, with its inner diameter matching the output end of the motor shaft. The inner side is provided with an internal thread (which is adapted to the external thread of the output end of the shaft). The threaded engagement enables the ring seat 21 to be circumferentially positioned and axially locked with the shaft 13, preventing the ring seat 21 from slipping during hoisting.

[0046] The extension arm 22 includes a horizontally arranged first end 221 and second end 222, and an inclined connecting portion 223 connecting the first end 221 and the second end 222. The first end 221 is used to connect to the rotor seat 21, and the second end 222 is used to connect the end cover 15 and the housing 16. The connecting portion 223 of the extension arm 22 is thickened to meet strength requirements. In this embodiment, a total of six extension arms 22 are provided, with three extension arms forming a group. The two groups of extension arms are symmetrically arranged about the center of the rotor seat 21 to ensure that the gap between the rotor and the stator is basically consistent in all radial directions, achieving uniform guidance. At the same time, it can also make the rotor seat evenly distributed with force, avoiding deformation of the rotor seat due to unbalanced force.

[0047] The length of the long bolt 23 should be at least able to pass through the through hole 25, the first axial hole 151, and the second axial threaded hole 161 in sequence. Its diameter should be 0.5mm-1mm smaller than the inner diameter of the through hole 25 and the first axial hole 151 to achieve a clearance fit between the long bolt and the through hole and the first axial hole.

[0048] By tightening the long bolt 23, downward pressure can be stably applied, thereby effectively balancing the suction force between the stator and rotor during assembly and solving the problem of unstable downward pressure during assembly. Figure 6As shown, by setting the top guide component 2, the reaction force during the pressing process is no longer transmitted to the bearing 14 through the end cap 15, but is transmitted to the ring seat 21 through the extension arm 22. The ring seat 21 transmits the force to the rotating shaft 13, directly balancing the tension on the rotating shaft 13, thereby avoiding excessive axial force on the bearing 14.

[0049] During the disassembly process of the mining truck motor, the top guide assembly 2 also includes a washer and a nut. The washer is placed on the second axial threaded hole 161, and the nut is placed below the first axial hole 151. The long bolt 23 passes through the through hole 25 and the first axial hole 151 and is threadedly connected to the nut, with the end of the long bolt 23 abutting against the washer. At this time, by tightening the long bolt 23, its lower end can extend out of the nut, thereby turning the top cover 15 and achieving separation between the stator and rotor. During this process, at least part of the force on the long bolt 23 is transmitted to the bearing seat 21 through the extension arm 22, and the bearing seat 21 transmits it to the rotating shaft 13, thereby reducing the axial force on the bearing 14.

[0050] The top guide assembly provided in this embodiment is adaptable to both disassembly and assembly processes, achieving bidirectional reuse: during assembly, the extended arm positions the long bolt, and the threaded connection applies downward pressure to the rotor; during disassembly, the threaded engagement of the long bolt and nut, along with the reaction force of the lower end of the long bolt against the washer, helps to achieve uniform and smooth separation of the stator and rotor. The top guide assembly achieves bidirectional adaptability for disassembly and assembly, avoiding the need to design two separate guide structures for disassembly and assembly, reducing the number of tooling components, and lowering the cost of carrying and storing in the mine; simultaneously, operators do not need to replace core components, only need to add washer and nut to switch operating conditions, simplifying the operation process.

[0051] like Figure 10 and Figure 11 As shown, the bottom fixing component 3 includes a base plate 31 and a connecting plate 32, which are vertically welded together in an L-shape.

[0052] The connecting plate 32 has four housing connection holes 321, which correspond to the connection holes on the base feet 162 on the outer side of the housing. The connecting plate 32 and the base feet 162 are fixed together by bolts. The base plate 31 has two oblong holes extending perpendicular to the connecting plate, which serve as frame connection holes 311. The oblong holes are designed to accommodate the foot spacing deviations of different models of mining truck motors.

[0053] Preferably, a reinforcing rib 33 is also provided between the connecting plate 32 and the base plate 31. The reinforcing rib 33 is a right-angled triangle, and its two right-angled sides are fixedly connected to the connecting plate 32 and the base plate 31 by welding or other means to improve the overall strength of the bottom fixing assembly. In addition, multiple reinforcing ribs can be arranged in parallel as needed, distributed at intervals along the length of the connecting plate, which can distribute the overturning force of the casing to the base plate and the frame to prevent the connecting plate 32 from deforming.

[0054] The same bottom fixing component 3 is used in both the disassembly and assembly processes, but the stress on the bottom fixing component 3 differs: during disassembly, the bottom fixing component 3 mainly holds the casing in place to resist the magnetic attraction when the stator and rotor separate; during assembly, the bottom fixing component 3 mainly maintains the lateral stability of the casing and prevents it from tipping over. This embodiment achieves bidirectional reuse by optimizing the structure of the bottom fixing component 3, making its structural strength and installation position suitable for both disassembly and assembly processes.

[0055] During disassembly or assembly, the top guide assembly 2 ensures a uniform distance between the rotor and stator in all directions, preventing them from getting too close in one direction or even colliding under suction. The bottom fixing assembly 3 keeps the housing and stator in a fixed position, preventing the housing from shifting or tipping over, which could damage the motor or cause injury to personnel. The auxiliary tooling for disassembly and assembly of mining truck motors provided in this application, through the cooperation of the top guide assembly and the bottom fixing assembly, achieves lower fixing and upper guidance, preventing shaking during motor disassembly and assembly and ensuring safety and stability.

[0056] In addition, the top guide assembly 2 and the bottom fixing assembly 3 make full use of the structure of the mining truck motor itself. The ring seat 21 is connected by the thread of the output end of the shaft 13. The extension arm 22 and the long bolt 23 are matched by the openings of the end cover 15 and the housing 16 itself. The bottom fixing assembly 3 is connected by the foot 162 on the housing 16 itself, so as to assist the disassembly and assembly process without changing the motor structure.

[0057] As a further improvement, two symmetrical slots 21a are formed on the outer surface of the ring seat 21. Three extension arms 22 form a group, and the first end 221 of each group of extension arms 22 is inserted into the corresponding slot 21a. An axial connection hole is provided on the ring seat, located within the vertical projection plane of the slot. The ring seat 21 and the first end 221 of the extension arms 22 are connected by axial connecting bolts 24. This structural design achieves a dual connection of snap-fit ​​and bolt fixation, strengthening the structure at the connection between the ring seat and the extension arms, distributing the bolt stress to the contact surface between the slot and the bolt, avoiding localized stress concentration, reducing the risk of component damage, and ensuring structural stability during hoisting. The number, position, and size of the slots 21a, as well as the number and position of the extension arms 22, can be adjusted as needed.

[0058] Furthermore, the structure of the first end 221 of the extension arm 22 can be optimized. For example, the first end of the extension arm may include a first arm 221a and a second arm 221b, with an insertion interface formed between the first arm 221a and the second arm 221b. The first arm 221a rests on the upper surface of the ring seat 21, and the second arm 221b is inserted into the slot 21a of the ring seat 21. The insertion interface is engaged with the outer side of the ring seat above the slot. The axial connecting bolt 24 passes sequentially through the first arm, the ring seat above the slot, the second arm, and the ring seat below the slot. The extension arm 22 and the ring seat 21 form a nested structure that engages with each other, further strengthening the structure of this part and forming a whole, avoiding stress on a single bolt.

[0059] It is readily conceivable that the first arm 221a can be inserted into the slot 21a, and the second arm 221b can be placed on the lower surface of the ring base. In a possible embodiment, three arms can also be provided at the first end of the extension arm, with the first arm placed on the upper surface of the ring base and the second arm inserted into the slot of the ring base.

[0060] If the first end of the extension arm is connected to the ring seat by only one bolt, although the vertical strength can be met by the slotted nesting design, the single-bolt structure may still twist during the hoisting of a heavy rotor, causing instability. Therefore, two axial connecting bolts 24 can be set at the connection position between the extension arm and the ring seat. These two axial connecting bolts 24 are arranged inside and outside along the radial direction of the ring seat 21, which can prevent the extension arm from twisting during hoisting, increase redundancy, and improve hoisting safety.

[0061] The assembly process of the mining truck motor based on the above-mentioned auxiliary tooling for disassembling and assembling mining truck motors is as follows: Step S1: Place the motor housing upright on the load-bearing platform and adjust the position of the housing so that the stator axis is perpendicular to the plane of the platform; attach the connecting plate of the bottom fixing component to the bottom foot of the housing, and tighten the bolts through the housing connecting hole of the connecting plate and the horizontal connecting hole of the bottom foot to fix the connecting plate to the housing; then, through the waist-shaped hole of the base plate and the preset threaded hole of the platform, adjust the position of the base plate to center the housing, and tighten the bolts to achieve a stable fixation between the housing and the platform.

[0062] Step S2: Clean the external threads of the shaft output end (remove oil and impurities), align the internal threads of the ring seat with the shaft output end, and turn the ring seat clockwise until it fits against the shaft shoulder; snap the first end of the extension arm into the slot of the ring seat, aligning the through hole of the first end of the extension arm with the axial connection hole on the ring seat, and fix each extension arm with two axial connection bolts to ensure that there is no looseness between the extension arm and the ring seat.

[0063] Step S3: Use an electric hoist to connect the hook to the lifting ring installed at the threaded hole at the top of the shaft, slowly lift the rotor and end cover assembly, adjust the lifting height to make the rotor axis coincide with the stator axis, and then slowly lower the assembly until the end cover is about 50mm away from the upper surface of the casing.

[0064] Step S4: Take 6 long bolts and pass them through the through holes at the second end of the 6 extension arms and the first axial hole of the end cap, respectively. Align them with the second axial threaded hole of the housing and tighten them clockwise. Tighten each bolt 5 turns first to ensure stable thread engagement. Use a torque wrench to tighten the long bolts in sequence. Apply downward pressure to the rotor through the thread engagement of the bolts to balance the magnetic attraction force between the stator and rotor.

[0065] Step S5: Tighten the long bolts gradually in a diagonal sequence. At this time, the rotor will drop about 3mm. Repeat the diagonal tightening operation. After each tightening, the rotor will drop 2-3mm until the end cover is attached to the upper surface of the housing.

[0066] Step S6: Loosen and remove the 6 long bolts in diagonal order, then remove the axial connecting bolts between the extension arm and the ring seat, and the threaded connection between the ring seat and the rotating shaft. Remove the top guide assembly. Finally, pass the connecting bolts through the first axial hole of the end cover and the second axial threaded hole of the housing to complete the fixing of the end cover and the housing. The assembly process is now complete.

[0067] The disassembly process of the mining truck motor based on the above-mentioned auxiliary tooling for disassembling and assembling mining truck motors is as follows: Step S1: Same as assembly step S1, place the motor upright on the stand, fix it to the bottom feet of the housing through the connecting plate of the bottom fixing component, and fix the bottom plate to the stand to ensure that the housing does not shake.

[0068] Step S2: Use a torque wrench to loosen the connecting bolts between the end cover and the housing in a diagonal sequence. After removing the bolts, the end cover is connected to the rotor via a bearing (at this time, the end cover can move synchronously with the rotor).

[0069] Step S3: Tighten the threads of the ring seat and the output end of the shaft, and fix the six extension arms to the ring seat respectively (same as assembly step S2); place six washers on the second axial threaded holes respectively, and place a nut below the first axial hole. Then, pass the six long bolts through the through holes of the extension arms and the first axial hole of the end cap respectively, and connect them to the nuts with threads. The lower ends of the long bolts 23 rest against the washers. At this time, by tightening the long bolts, their lower ends can protrude from the nuts, thereby turning the end cap upside down and realizing the separation between the stator and rotor.

[0070] Step S4: Connect the electric hoist hook to the lifting ring installed at the threaded hole at the top of the shaft, slowly lift it upwards, and at the same time tighten each long bolt in a diagonal order. Under the action of the reverse push of the long bolts and the pulling force of the electric hoist, the rotor rises smoothly and evenly along the axis. During the lifting process, observe the relative position of the rotor and stator to ensure there is no scraping, until the rotor is completely separated from the stator, completing the separation of the rotor and stator; finally, remove the long bolts, nuts, washers, extension arms, ring seats and bottom fixing components, and the disassembly process is complete.

[0071] The embodiments provided in this application, by using auxiliary tooling for disassembling and assembling mining truck motors, not only achieve protection for personnel and motors during the disassembly and assembly process, making the process more stable and safer, but also improve operational efficiency. Traditional manual assembly and disassembly processes require 3-4 people working together and take about half an hour; the assembly and disassembly processes in this solution only require 2 people and take 10 to 20 minutes.

[0072] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. An auxiliary tooling for disassembling and assembling a mining truck motor, applied in the disassembly and assembly process of a mining truck motor, the mining truck motor comprising a rotor, a stator, a shaft, bearings, an end cover, and a housing, wherein the end cover has a first axial hole, the upper end face of the housing has a second axial threaded hole, and the outer side of the housing is provided with feet, characterized in that: The auxiliary tooling for disassembling and assembling the special motor for mining trucks includes a top guide assembly and a bottom fixing assembly; The top guide assembly includes a ring seat, an extension arm, and a long bolt. The ring seat is fitted onto the output end of the rotating shaft, and a thread is provided on the inner side of the ring seat. The ring seat and the output end of the rotating shaft are locked together by the thread. The extension arm has multiple arms, the first end of each extension arm is bolted to the ring seat, and the second end extends above the first axial hole of the end cap, and the second end has a through hole corresponding to the first axial hole. The long bolt passes through the through hole, the first axial hole, and the second axial threaded hole in sequence. The long bolt has a clearance fit with the through hole and the first axial hole, and the long bolt is threadedly connected to the second axial threaded hole. The bottom fixing components are provided in at least two sets, each set including a base plate and a connecting plate. The base plate and the connecting plate are connected vertically in an L-shape. The connecting plate has a housing connection hole and is connected to the base by bolts. The base plate has a frame connection hole and is connected to the frame by bolts. When there are two sets of bottom fixing components, the two sets of bottom fixing components are arranged opposite each other in the horizontal direction.

2. The auxiliary tooling for disassembling and assembling a mining truck-specific motor according to claim 1, characterized in that: During the disassembly process of the mining truck motor, the top guide assembly also includes a washer and a nut. The washer is placed on the second axial threaded hole, and the nut is placed below the first axial hole. The long bolt passes through the through hole and the first axial hole and is threadedly connected to the nut. The end of the long bolt rests against the washer.

3. The auxiliary tooling for disassembling and assembling a mining truck-specific motor according to claim 1, characterized in that: A slot is provided on the outer side of the ring seat, and at least a portion of the first end of the extension arm is inserted into the slot. An axial connection hole is provided on the ring seat, and the ring seat and the extension arm are connected by an axial connection bolt passing through the axial connection hole.

4. The auxiliary tooling for disassembling and assembling a mining truck-specific motor according to claim 3, characterized in that: The first end of the extension arm includes a first arm and a second arm, with an insertion interface formed between the first arm and the second arm. The first arm rests on the upper surface of the ring seat, and the second arm is inserted into the slot of the ring seat. The insertion interface is engaged with the outer side of the ring seat above the slot. The axial connecting bolt passes sequentially through the first arm, the ring seat above the slot, the second arm, and the ring seat below the slot.

5. The auxiliary tooling for disassembling and assembling a mining truck-specific motor according to claim 1, characterized in that: The multiple extension arms are arranged symmetrically about the center of the ring base in the horizontal direction.

6. The auxiliary tooling for disassembling and assembling a mining truck-specific motor according to claim 1, characterized in that: The first end of the extension arm is connected to the ring seat by two axial connecting bolts. The ring seat has two axial connecting holes for each extension arm, and the two axial connecting holes are arranged radially inside and outside the ring seat.

7. The auxiliary tooling for disassembling and assembling a mining truck-specific motor according to claim 1, characterized in that: The bottom fixing component has reinforcing ribs connecting the connecting plate and the base plate.

8. The auxiliary tooling for disassembling and assembling a mining truck-specific motor according to claim 1, characterized in that: The frame connection hole is an oblong hole, which extends in a direction perpendicular to the connection plate.

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