Permanent magnet direct drive three-axle bogie and vehicle

Abstract

The application discloses a permanent magnet direct drive three-axle bogie and a vehicle, the bogie comprises a frame and a direct drive wheel set unit arranged on the frame, the direct drive wheel set unit adopts a hollow shaft diaphragm coupling, permanent magnet motors of the three axles all adopt interchangeable frame suspension structures, a suspension arm on one side of the permanent magnet motor and two swing rods arranged on the other side of the permanent magnet motor are provided with rubber joints on the suspension arm and the swing rods, and are connected with the frame through the rubber joints, two motor stop plates connected with the permanent magnet motor are arranged between the two swing rods, a transverse stop plate is fixedly arranged on the frame and extends into the two motor stop plates, and elastic stop blocks are arranged on both sides of the end portion of the transverse stop plate, the elastic stop blocks are located between the two motor stop plates, the free clearance of the middle axle is set as zero clearance, and the end axles have appropriate stop clearances. The application can make the diaphragm coupling transverse displacement adaptive amount, especially the middle axle, and meet the transverse displacement amount of the motor and the wheel set of the elastic frame suspension structure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rail transit vehicles, in particular to a permanent magnet direct drive three-axle bogie and vehicle. BACKGROUND

[0002] The bogie with permanent magnet direct drive wheel sets eliminates the traditional gear transmission device, has no gear meshing noise, is more quiet, has no transmission energy loss, is more energy-saving, does not need to use gear lubricating oil, is more environmentally friendly, has a simple direct drive system structure, is more reliable, and the direct drive system is all metal, so that maintenance-free can be realized in the maintenance period.

[0003] Patent CN110962873B discloses a high-power permanent magnet direct drive three-axle bogie, which adopts a hollow shaft diaphragm coupling to couple the rotation of the motor and the wheel, adopts a pull rod positioning for the first series, adopts a single pull rod traction to connect the bogie end beam and the middle part of the vehicle body, and the end beam of the frame is of an upper flat and lower protruding structure.

[0004] Generally, a certain amount of transverse movement is arranged between the end shaft of the three-axle bogie and the frame, and a larger amount of transverse movement is arranged between the middle shaft and the frame compared with the end shaft, so as to ensure good adaptability of the large-axle-distance three-axle bogie in curve passing. In order to reduce the guiding force of the middle shaft and avoid faster wear caused by bidirectional guiding compared with the end shaft, a certain amount of transverse movement is usually arranged on the shaft box bearing of the middle shaft. In addition, the three-axle bogie has a large wheel rail angle and a large head inertia due to a large end shaft distance, and the wheel rail dynamic action and wear are large, so the adaptability to mountain curves is poor. The elastic frame suspension that releases the transverse motor mass is an important technical means to reduce the wheel rail transverse dynamic action.

[0005] The transverse displacement adaptation amount of the hollow shaft diaphragm coupling is limited, and the limit displacement is usually less than 18mm, and the dynamic displacement is usually less than 12mm. If the middle shaft of the three-axle bogie adopts the hollow shaft diaphragm coupling, the transverse displacement adaptation amount of the middle shaft cannot meet the transverse displacement amount of the motor and the wheel set of the elastic frame suspension structure, and the motor and the wheel set may move in the opposite direction with a large displacement during operation. At this time, the diaphragm may be damaged, the corresponding reliability requirement cannot be met, and the 2.4 million kilometer maintenance cycle requirement cannot be met.

[0006] Therefore, in view of the above technical problems, how to make the transverse displacement adaptation amount of the diaphragm coupling meet the transverse displacement amount of the motor and the wheel set of the elastic frame suspension structure is a technical problem to be solved by those skilled in the art. SUMMARY

[0007] The purpose of the present application is to provide a permanent magnet direct drive three-axle bogie and vehicle, which solves the problem of transverse displacement adaptation of the diaphragm coupling.

[0008] In order to achieve the above object, the application provides a permanent magnet direct drive three-axle bogie, which comprises a frame and a direct drive wheel set unit arranged on the frame, the direct drive wheel set unit directly transmits torque of a permanent magnet motor to a wheel by using a hollow shaft diaphragm coupling, further comprises a suspension arm arranged on one side of the permanent magnet motor and two swing rods arranged on the other side of the permanent magnet motor, so as to form a three-point connection structure, the suspension arm and the swing rods are both provided with rubber joints and are connected with the frame through the rubber joints, two motor stop plates connected with the permanent magnet motor are arranged between the two swing rods, a transverse stop plate is fixedly arranged on the frame and extends into the two motor stop plates, elastic stop blocks are arranged on both sides of the end of the transverse stop plate, adjustment shims are arranged between the elastic stop blocks and the transverse stop plate, the elastic stop blocks are located between the two motor stop plates, and the stop gap between the elastic stop blocks and the motor stop plates is adjusted by increasing or decreasing the adjustment shims, the stop gap at the end shaft is preset, the stop gap at the middle shaft is zero, and the elastic stop blocks at the middle shaft enter between the two motor stop plates in a pre-compressed state.

[0009] Preferably, opposite parallel pressing plates are arranged outside the two elastic stop blocks of the middle shaft, and the upper and lower ends of the two pressing plates are connected by process bolts, so that the elastic stop blocks enter between the two motor stop plates in a pre-compressed state, and the process bolts are removed after installation is completed.

[0010] Preferably, a flange surface is arranged on one side of the suspension arm and is fixedly connected with the shell of the permanent magnet motor, and a rubber joint is arranged on the other side of the suspension arm, a first joint shaft is arranged in the rubber joint, and the first joint shaft is connected with the frame by bolts.

[0011] Preferably, the swing rods are both provided with the rubber joints and second joint shafts, the second joint shafts are arranged in the rubber joints, and the two second joint shafts are connected with the shell of the permanent magnet motor and the frame by bolts.

[0012] Preferably, the frame comprises a pair of side beams, a plurality of cross beams and a traction beam connected with the pair of side beams, the cross beams and the traction beam are arranged at intervals, so that the frame is in a "eye" shape, and the cross beams and the traction beam are in a middle sunken structure.

[0013] Preferably, the cross beams comprise a first cross beam, a second cross beam and a third cross beam, the first cross beam, the second cross beam and the third cross beam are provided with swing rod mounting seats corresponding to the second joint shafts, and the second cross beam, the third cross beam and the traction beam are provided with suspension arm mounting seats corresponding to the first joint shafts.

[0014] Preferably, the root of the suspension arm mounting seat is provided with an anti-loosening bolt mounted by a bolt, the anti-loosening bolt is located at the lower side of the suspension arm mounting seat, and there is a gap between the anti-loosening bolt and the suspension arm, the gap is smaller than the height difference between the lower surface of the suspension arm mounting seat and the upper surface of the first joint shaft.

[0015] Preferably, the traction beam is located at the end of the frame, and the traction device is arranged on the traction beam, the traction device adopts a single-pole structure of a cable-stayed type and is arranged towards the center of the vehicle body.

[0016] Preferably, the suspension device further comprises a primary suspension device arranged at the lower side of the side beam, the primary suspension device adopts a steel round spring, a single pull rod and a vertical damper, wherein the shaft box pull rod of the end shaft is arranged towards the center of the frame, and the shaft box pull rod of the intermediate shaft is installed together with the shaft box pull rod of the other end shaft on the pull rod seat of the frame.

[0017] Preferably, the suspension device further comprises a secondary suspension device arranged at the upper side of the side beam, the secondary suspension device comprises a high deflection steel round spring arranged at the center of the side beam to support the vehicle body, a vertical damper and a lateral damper.

[0018] A vehicle comprising the permanent magnet direct drive three-axle bogie described above.

[0019] With respect to the above background technology, the direct drive wheel set unit of the present application adopts a hollow shaft diaphragm coupling, which releases the degrees of freedom of the motor and the wheel set except for rotation to a certain extent, but the lateral displacement adaptability is limited; in view of this, the permanent magnet motor of the present application adopts a suspension mounting, which can adjust the stop gap between the elastic stop block and the motor stop plate, so that the intermediate shaft of the bogie is rigidly suspended, and the end shaft of the bogie is elastically suspended; specifically, the permanent magnet motor is connected to the frame through suspension arms and swing rods on both sides, forming a three-point structure, the stop gap of the intermediate shaft is zero, limiting the lateral swing of the motor and the frame, forming a rigid suspension, and the end shaft is provided with a certain stop gap and a coupling damper, forming an elastic suspension. In order to make the smaller guiding force on the intermediate shaft on the curve, the intermediate shaft bearing is provided with a certain amount of lateral movement, the maximum lateral movement between the permanent magnet motor and the wheel set is increased on the basis of the lateral movement of the end shaft bearing, which is greater than the lateral displacement adaptability of the diaphragm coupling, so that the stop gap of the intermediate shaft is set to zero, and the lateral displacement adaptability of the diaphragm coupling can meet the maximum lateral movement between the motor and the wheel set, thereby solving the problem of lateral displacement adaptability of the intermediate diaphragm coupling. In addition, the bogie adopts rigid suspension of the intermediate shaft and elastic suspension of the end shaft, which ensures the interchangeability of the motor, releases the yaw inertia at the end shaft and the lateral mass between the springs, reduces the original larger wheel rail effect of the end shaft, and improves the stability of the bogie, further improves the reliability and maintenance period of the wheel shaft drive unit. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description only belong to the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor based on the provided drawings.

[0021] Figure 1 A permanent magnet direct drive three-axle bogie structure schematic diagram provided by the embodiments of the present application;

[0022] Figure 2 A suspension arm setting structure schematic diagram provided by the embodiments of the present application;

[0023] Figure 3 A suspension arm sectional view provided by the embodiments of the present application;

[0024] Figure 4 A swing rod setting structure schematic diagram provided by the embodiments of the present application;

[0025] Figure 5 A transverse stop plate and motor stop plate structure schematic diagram provided by the embodiments of the present application;

[0026] Figure 6 A pressing plate setting structure schematic diagram provided by the embodiments of the present application;

[0027] Figure 7 A pressing plate and elastic stop block cooperation structure schematic diagram provided by the embodiments of the present application;

[0028] Figure 8 A frame structure schematic diagram provided by the embodiments of the present application;

[0029] Figure 9 An end shaft and intermediate shaft principle schematic diagram of a three-axle bogie provided by the embodiments of the present application.

[0030] In the figure: 1-permanent magnet motor; 2-suspension arm; 3-primary suspension device; 4-end shaft box; 5-intermediate shaft box; 6-frame; 7-traction device; 8-secondary suspension device; 9-braking device; 10-wheel; 11-swing rod; 12-second joint shaft; 13-first joint shaft; 14-anti-drop bolt; 15-motor stop plate; 16-transverse stop plate; 17-adjustment gasket; 18-elastic stop block; 19-side beam; 20-first cross beam; 21-second cross beam; 22-third cross beam; 23-traction beam; 24-swing rod mounting seat; 25-suspension arm mounting seat; 26-pull rod seat; 27-pressing plate. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present application.

[0032] It should be noted that in the present embodiment, the directions or position relationships indicated by "upper", "lower", "front", "rear" and the like are based on the directions or position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and thus cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus cannot be understood as limiting the present application. In addition, "first", "second", "third", "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0033] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0034] The hollow shaft diaphragm coupling is a key component of the permanent magnet direct drive locomotive. The permanent magnet direct drive transmission device using the hollow shaft diaphragm coupling has the hollow shaft of the diaphragm coupling sleeved on the axle, the hollow rotor of the direct drive motor is sleeved on the hollow shaft of the diaphragm coupling, one end of the diaphragm coupling is connected with the motor rotor, and the other end is connected with the driving wheel. The high flexibility in the thickness direction of the diaphragm is used to realize the axial and radial displacement, thereby restricting the rotation of the wheel set and the motor, transmitting the motor torque to the wheel, and releasing the freedom degree of displacement to a certain extent, thereby ensuring the feasibility of the bogie suspension type permanent magnet direct drive bogie drive device scheme.

[0035] The transmission device has the advantages of canceling the complex gear box, eliminating the easily damaged gears and transmission bearings, eliminating the noise of gear meshing, not needing to use lubricating oil, avoiding a series of stubborn failures and shortcomings such as bearing corrosion and damage, gear wear and tooth breakage, shaft fatigue, gear box oil leakage and emulsification, gear meshing noise, and improving the reliability, availability and environmental protection performance. Another advantage of the direct drive structure is that the maintenance period is significantly improved. The bearing speed of the direct drive motor is low, the bearing rated load is large, and the calculated life far exceeds the life of the conventional motor bearing. The maintenance period is twice that of the conventional motor bearing, and is expected to reach 2.4 million kilometers. The motor bearing and transmission bearing of the original gear transmission are the bottleneck of the driving overhaul period. Now the direct drive structure is adopted, and there is no bottleneck restriction. In order to improve the overhaul period of the entire driving unit, it is necessary to ensure that the maintenance period of the diaphragm coupling reaches and synchronizes with the permanent magnet motor, so that the maintenance period of the entire drive can be improved to 2.4 million kilometers.

[0036] To improve the maintenance cycle of the direct drive structure, the overall structure of the bogie needs to ensure that the relative displacement of the direct drive motor and the wheel set in operation is small enough, so as to ensure that the service life of the diaphragm coupling is improved to 2.4 million kilometers. The diaphragm coupling is a full metal piece, and the maintenance cycle is long. Its weak part is the diaphragm group, and the high transverse deflection deformation is the main part of its fatigue damage. The load of the diaphragm group comes from three aspects: one, the pre-tightening pressure of the diaphragm group bolt installation, two, the large torque of the diaphragm group transmitted by the direct drive motor, and three, the diaphragm group adapts to the axial and radial displacement through elastic deformation. These three aspects together constitute the input of the diaphragm load. The former two are inherent inputs determined by the overall performance requirements of the locomotive, and the latter is the input brought by the structure of the bogie. To improve the service life of the diaphragm coupling, the displacement amount that the diaphragm group needs to adapt to should be reduced as much as possible from the structure.

[0037] Please refer to Figure 9 For a three-axle bogie, in order to ensure the adaptation of three wheel sets to the curve and good stability, the lateral displacement of the end shaft box bearing is basically zero, and the lateral displacement of the middle shaft box bearing is set to be large; relative to the end shaft, the motor and the wheel set of the middle shaft need to increase the lateral displacement of the wheel set required to adapt to the curve. If the middle shaft is not specially set, the diaphragm group of the middle shaft coupling needs to adapt to the maximum lateral displacement, and its service life will be significantly reduced, which may not reach 2.4 million kilometers.

[0038] The middle shaft elastic stop adopts a laminated rubber pre-compression installation method, and the stiffness is matched. In this way, the free gap of the stop is zero, but the elastic gap can be controlled within a certain range in normal operation, which can reduce the displacement of the middle shaft diaphragm coupling and effectively improve the service life of the diaphragm coupling, ensuring that the maintenance cycle reaches 2.4 million kilometers, so that the advantages of the three-axle direct drive bogie can be brought into play. In summary, the present application provides a technical scheme of a middle shaft transverse elastic stop, which is as follows:

[0039] As shown in Figures 1 to 8 In this embodiment, a permanent magnet direct drive three-axle bogie is provided, which includes a frame 6 and a direct drive wheel set unit arranged on the frame 6. The direct drive wheel set unit adopts a hollow shaft diaphragm coupling to directly transmit the torque of a permanent magnet motor 1 to a wheel 10. The permanent magnet motor 1 is suspendedly installed. Specifically, a suspension arm 2 is arranged on one side of the permanent magnet motor 1, and two swing rods 11 are arranged on the other side of the permanent magnet motor 1, thereby forming a three-point connection structure connected with the frame 6. The three-axle bogie is correspondingly provided with three permanent magnet motors 1, and the three permanent magnet motors 1 are indistinguishable and interchangeable.

[0040] Rubber joints are arranged on the suspension arm 2 and the swing rod 11, and the suspension arm 2 and the swing rod 11 are connected with the frame 6 through the rubber joints. Please refer to Figure 4 andFigure 5 Two motor stop plates 15 connected with the permanent magnet motor 1 are arranged between the two swing rods 11, and a transverse stop plate 16 extending into the space between the two motor stop plates 15 is fixed on the frame 6, and elastic stop blocks 18 are arranged on both sides of the end of the transverse stop plate 16, and the adjustment gaskets 17 are arranged between the elastic stop blocks 18 and the transverse stop plate 16, the elastic stop blocks 18 are located between the two motor stop plates 15, and the stop gap between the elastic stop blocks 18 and the motor stop plates 15 is adjusted by increasing or decreasing the adjustment gaskets 17.

[0041] It is emphasized that the intermediate shaft in the present application adopts rigid suspension, that is, the elastic stop blocks 18 at the intermediate shaft enter between the two motor stop plates 15 in a pre-compressed state, so that the stop gap between the elastic stop blocks 18 at the intermediate shaft and the motor stop plates 15 is zero, and the rigidity of the elastic stop blocks 18 of the intermediate shaft is designed to produce a suitable displacement within the transverse operating load of the permanent magnet motor 1, and the displacement value will not be greater than the pre-compressed amount, so that the permanent magnet motor 1 in normal operation always maintains contact with the frame 6 through the stop, and the displacement value can also ensure that the transverse relative displacement of the permanent magnet motor 1 of the intermediate shaft and the wheel set meets the displacement capacity of the diaphragm coupling; the vertical and longitudinal movement of the permanent magnet motor 1 relative to the frame can be adapted through the small shear stiffness of the laminated spring, so as to limit the transverse swing of the permanent magnet motor 1 and the frame 6 while adapting the micro-motion of the permanent magnet motor 1 and the wheel set in the longitudinal and vertical directions. The end shaft in the present application adopts elastic suspension, and the end shaft has a pre-set stop gap, that is, the end shaft is provided with a certain stop gap and a coupling shock absorber, and the size of the stop gap can be set according to actual conditions.

[0042] The direct drive transmission device adopts a hollow shaft diaphragm coupling, which releases the degrees of freedom of the permanent magnet motor 1 and the wheel set except rotation to a certain extent, but the transverse displacement adaptability is limited; the end shaft bearing has no lateral movement, and the size of the transverse stop gap of the end shaft permanent magnet motor 1 is set to be less than the transverse displacement adaptability of the hollow shaft diaphragm coupling; in order to obtain a smaller guiding force on the curve of the intermediate shaft, the intermediate shaft bearing is provided with a certain lateral movement, and the maximum transverse movement between the permanent magnet motor 1 and the wheel set is increased on the basis of the lateral movement of the bearing, which is greater than the transverse displacement adaptability of the hollow shaft diaphragm coupling, so that the transverse stop gap of the intermediate shaft permanent magnet motor 1 is set to zero, and the transverse displacement adaptability of the hollow shaft diaphragm coupling can meet the maximum transverse movement between the permanent magnet motor 1 and the wheel set.

[0043] In addition, the intermediate shaft rigid suspension and the end shaft elastic suspension release the head inertia and the lateral mass of the spring at the end shaft, the originally larger wheel rail effect at the end shaft is reduced, and the running stability of the bogie is improved.

[0044] Please refer to Figure 6 and Figure 7, two elastic stop blocks 18 outside the intermediate shaft are provided with relatively parallel pressing plates 27, the upper and lower ends of the two pressing plates 27 are connected through process bolts, the elastic stop block 18 is in a compressed state by tightening the process bolts, during installation, the intermediate shaft transverse stop plate 16 in the compressed state is placed between the two motor stop plates 15, and then the process bolts are removed, so that the elastic stop block 18 is in a pre-compressed state between the two motor stop plates 15. The elastic stop block 18 is designed as a metal laminated rubber part, which has the characteristics of large axial stiffness and small tangential stiffness, the intermediate shaft transverse stop plate 16 limits the transverse swing of the permanent magnet motor 1 and the frame 6, and the intermediate shaft is not provided with a coupling damper.

[0045] Please refer to Figure 2 and Figure 3 , one side of the suspension arm 2 is provided with a flange surface, which is fixedly connected with the shell of the permanent magnet motor 1 through the flange surface, and the other side of the suspension arm 2 is provided with a rubber joint, a first joint shaft 13 is arranged in the rubber joint, and the first joint shaft 13 is connected with the frame 6 through bolts; please refer to Figure 4 , the two ends of the swing rod 11 are provided with rubber joints and second joint shafts 12, the second joint shafts 12 are arranged in the rubber joints, and the two second joint shafts 12 are connected with the shell of the permanent magnet motor 1 and the frame 6 through bolts. In order to ensure the interchangeability of the permanent magnet motor 1, the suspension arm 2 and the swing rod 11 on each permanent magnet motor 1 are arranged in the same way, and the motor stop plate 15, the transverse stop plate 16, and the matched elastic stop block 18 and adjusting gasket 17 are arranged in the same way, the elastic suspension and the rigid suspension are switched by adjusting the stop gap, the installation interface of the permanent magnet motor 1 is ensured to be consistent, and the interchangeability of the motor is realized.

[0046] Please refer to Figure 8 , the frame 6 includes a pair of side beams 19 and a plurality of cross beams and a traction beam 23 connected with the pair of side beams 19, the cross beams and the traction beam 23 are arranged at intervals, so that the frame 6 is in the shape of “eye”, and the traction beam 23 is arranged at the end beam. In order to adapt to the installation of the suspension of the permanent magnet motor 1, the cross beams and the traction beam 23 are in a middle sunken structure.

[0047] Further, the cross beam includes a first cross beam 20, a second cross beam 21 and a third cross beam 22, the first cross beam 20, the second cross beam 21 and the third cross beam 22 are provided with swing rod mounting seats 24 connected with the second joint shafts 12 correspondingly, and the second cross beam 21, the third cross beam 22 and the traction beam 23 are provided with suspension arm mounting seats 25 connected with the first joint shafts 13 correspondingly. The suspension arm mounting seat 25 is an integral machining part, which is arranged on the vertical plate of the second cross beam 21, the third cross beam 22 and the traction beam 23, and forms a combined part with the vertical plate through butt welding.

[0048] Please refer to Figure 2 and Figure 3The root of the suspension arm mounting seat 25 is provided with an anti-falling bolt 14 through bolt mounting, and the anti-falling function of the permanent magnet motor 1 is realized by the anti-falling bolt 14 and the swing rod 11. The first joint shaft 13 of the suspension arm 2 is connected with the suspension arm mounting seat 25 through two bolts, and the flange surface at the other end is provided with a plurality of mounting bolts connected with the shell of the permanent magnet motor 1. The weakest position is the mounting bolt at the connection between the suspension arm 2 and the suspension arm mounting seat 25. The first swing rod and the second swing rod are connected with the shell of the permanent magnet motor 1 and the swing rod mounting seat 24 through swing rod mounting bolts, and the weakest position is the mounting bolt at the swing rod mounting seat 24. On this basis, the anti-falling bolt 14 is located below the suspension arm mounting seat 25 and has a gap with the suspension arm 2, and the gap is smaller than the height difference between the lower surface of the suspension arm mounting seat 25 and the upper surface of the first joint shaft 13. Therefore, even if the mounting bolt at the connection of the suspension arm mounting seat 25 is loose, the suspension arm 2 and the first joint shaft 13 cannot be separated from the locking of the anti-falling bolt 14 and the suspension arm mounting seat 25, forming anti-falling protection. The two swing rods 11 on the other side, the loosening of the mounting bolt of any swing rod 11, has the remaining another swing rod 11 connecting the permanent magnet motor 1 and the frame 6. The realization of the anti-falling function of the whole motor is realized only by adding one anti-falling bolt 14 part, which is simple and reliable in structure.

[0049] The traction device 7 is arranged on the traction beam 23, and the traction device 7 adopts a single-pole structure of a cable-stayed type and is arranged towards the center of the vehicle body, which is not limited here any more, and can be referred to the prior art.

[0050] The bogie further comprises a primary suspension device 3 arranged on the lower side of the side beam 19, which adopts a steel round spring, a single pull rod and a vertical damper. The shaft box pull rod of the end shaft is arranged towards the center of the bogie, and the shaft box pull rod of the middle shaft and the shaft box pull rod of the other end shaft are mounted on the pull rod seat 26 of the frame 6 together, which ensures the compactness of the overall structure of the bogie and realizes the maximum shortening of the wheelbase.

[0051] In addition, the end shaft of the end shaft box 4 is configured without a lateral displacement bearing, and the end shaft box 4 and the frame are provided with a primary lateral displacement; the middle shaft of the middle shaft box 5 is configured with a lateral displacement bearing, and the middle shaft box 5 and the frame 6 are provided with a primary lateral displacement to adapt to the curve passing of the three-axle bogie.

[0052] The bogie further comprises a secondary suspension device 8 arranged on the upper side of the side beam 19, which comprises a high-flex steel round spring arranged in the center of the side beam 19 to support the vehicle body, and is assisted by a vertical damper and a lateral damper.

[0053] The brake device 9 can be provided with a wheel disc foundation brake or a tread foundation brake; the space between the two wheels 10 on the same side can only ensure the normal operation and maintenance function requirements of the brake device 9, thereby, the wheelbase of the bogie is maximally shortened, the bogie yaw inertia and the end shaft lateral mass are significantly reduced, the wheel pair power action is significantly reduced, and the wheel 10 wear is significantly reduced.

[0054] In combination with the above embodiments, in the hollow shaft diaphragm coupling direct drive system of the application, the intermediate shaft adopts rigid suspension, and the end shaft adopts elastic suspension, and based on this core, the traction device 7 is arranged at the end of the frame 6, the motor anti-falling structure composed of the suspension arm mounting seat 25, the suspension arm 2 and the anti-falling bolt 14, the primary single pull rod positioning and the arrangement mode thereof jointly constitute the compact structure of the bogie assembly, this compact structure enables the wheelbase of the bogie to be maximally shortened, not only reduces the lateral movement amount of the intermediate shaft passing through the curve, but also significantly reduces the bogie yaw inertia, in combination with the rigid suspension direct drive system, the unsprung weight is significantly reduced, the wheel pair power action is significantly reduced, the wheel 10 wear is significantly reduced, further in combination with the use of the simple structure hollow shaft diaphragm coupling direct drive device, the reliability of the wheel pair driving unit is significantly improved, the maintenance period is significantly improved, and the advantages of the permanent magnet direct drive technology on the three-axle bogie are fully utilized.

[0055] The application also provides a vehicle comprising the above-mentioned permanent magnet direct drive three-axle bogie.

[0056] It should be noted that in the present specification, the relationship terms such as first and second are only used to distinguish one entity from another entity, and do not necessarily require or imply any such actual relationship or order between the entities.

[0057] The principles and implementation modes of the application are described by using specific examples in the present specification, and the above embodiment descriptions are only used to help understand the method of the application and its core idea. It should be noted that for ordinary skilled persons in the art, some improvements and modifications can be made to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A permanent magnet direct drive three-axle bogie, comprising a frame (6) and a direct drive wheelset unit provided on the frame (6), wherein the direct drive wheelset unit uses a hollow shaft diaphragm coupling to directly transmit the torque of a permanent magnet motor (1) to a wheel (10), characterized in that: It further includes a suspension arm (2) provided on one side of the permanent magnet motor (1) and two swing rods (11) provided on the other side of the permanent magnet motor (1) to form a three-point connection structure. Rubber joints are provided on both the suspension arm (2) and the swing rods (11), and they are connected to the frame (6) through the rubber joints. Two motor stop baffles (15) connected to the permanent magnet motor (1) are provided between the two swing rods (11). A transverse stop baffle (16) extending between the two motor stop baffles (15) is fixedly provided on the frame (6), and elastic stop blocks (18) are provided on both sides of the end of the transverse stop baffle (16). An adjustment gasket (17) is provided between the elastic stop block (18) and the transverse stop baffle (16). The elastic stop block (18) is located between the two motor stop baffles (15), and the stop gap between the elastic stop block (18) and the motor stop baffle (15) is adjusted by increasing or decreasing the adjustment gasket (17). There is a preset stop gap at the end shaft, the stop gap at the intermediate shaft is zero, and the elastic stop block (18) at the intermediate shaft enters between the two motor stop baffles (15) in a pre-compressed state.

2. The permanent magnet direct drive three-axle bogie according to claim 1, characterized in that: On the outer sides of the two elastic stop blocks (18) of the intermediate shaft, there are relatively parallel pressing plates (27). The upper and lower ends of the two pressing plates (27) are connected by process bolts to make the elastic stop block (18) enter between the two motor stop baffles (15) in a pre-compressed state. After installation, the process bolts are removed.

3. The permanent magnet direct drive three-axle bogie according to claim 2, characterized in that: One side of the suspension arm (2) has a flange surface, which is fixedly connected to the outer shell of the permanent magnet motor (1) through the flange surface. The other side of the suspension arm (2) has the rubber joint, and a first joint core shaft (13) is inserted through the rubber joint. The first joint core shaft (13) is connected to the frame (6) by bolts.

4. The permanent magnet direct drive three-axle bogie according to claim 3, characterized in that: Both ends of the swing rod (11) have the rubber joints and second joint core shafts (12). The second joint core shafts (12) are inserted through the rubber joints, and the two second joint core shafts (12) are respectively connected to the outer shell of the permanent magnet motor (1) and the frame (6) by bolts.

5. The permanent magnet direct drive three-axle bogie according to claim 4, characterized in that: The frame (6) includes a pair of side beams (19) and a plurality of cross beams and a traction beam (23) connecting the pair of side beams (19). The cross beams and the traction beam (23) are arranged at intervals, making the frame (6) in a "mesh" shape. The cross beams and the traction beam (23) are of a structure with a sunken middle part.

6. The permanent magnet direct drive three-axle bogie according to claim 5, characterized in that: The cross beams include a first cross beam (20), a second cross beam (21) and a third cross beam (22). Swing rod mounting seats (24) corresponding to the second joint core shafts (12) are provided on the first cross beam (20), the second cross beam (21) and the third cross beam (22). Suspension arm mounting seats (25) corresponding to the first joint core shafts (13) are provided on the second cross beam (21), the third cross beam (22) and the traction beam (23).

7. The permanent magnet direct drive three-axle bogie according to claim 6, characterized in that: The root of the suspension arm mounting seat (25) is installed with an anti-slip bolt (14) by means of a bolt. The anti-slip bolt (14) is located on the lower side of the suspension arm mounting seat (25) and has a gap with the suspension arm (2). The gap is smaller than the height difference between the lower surface of the suspension arm mounting seat (25) and the upper surface of the first joint core shaft (13).

8. The permanent magnet direct drive three-axle bogie according to claim 5, characterized in that: The traction beam (23) is located at the end of the frame (6), and a traction device (7) is provided on the traction beam (23). The traction device (7) adopts an inclined single-rod structure and is arranged toward the center of the vehicle body.

9. The permanent magnet direct drive three-axle bogie according to claim 5, characterized in that: It also includes a first-stage suspension device (3) arranged on the lower side of the side beam (19), wherein the first-stage suspension device (3) adopts a steel coil spring, a single pull rod and a vertical shock absorber, wherein the axle box pull rod of the end shaft is arranged toward the center of the frame (6), and the axle box pull rod of the middle shaft and the axle box pull rod of the other end shaft are installed together on the pull rod seat (26) of the frame (6).

10. The permanent magnet direct drive three-axle bogie according to claim 5, characterized in that: The vehicle body is also provided with a secondary suspension device (8) disposed on the upper side of the side beam (19), wherein the secondary suspension device (8) comprises a high-flex steel coil spring disposed in the center of the side beam (19) to support the vehicle body, and is supplemented by a vertical shock absorber and a lateral shock absorber.

11. A vehicle, characterized in that: It comprises the permanent magnet direct drive three-axle bogie described in any one of claims 1-10.

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